config USB_CHIPIDEA
tristate "ChipIdea Highspeed Dual Role Controller"
- depends on USB && USB_GADGET
- select USB_GADGET_DUALSPEED
+ depends on USB
help
Say Y here if your system has a dual role high speed USB
controller based on ChipIdea silicon IP. Currently, only the
peripheral mode is supported.
When compiled dynamically, the module will be called ci-hdrc.ko.
+
+if USB_CHIPIDEA
+
+config USB_CHIPIDEA_UDC
+ bool "ChipIdea device controller"
+ depends on USB_GADGET
+ select USB_GADGET_DUALSPEED
+ help
+ Say Y here to enable device controller functionality of the
+ ChipIdea driver.
+
+config USB_CHIPIDEA_DEBUG
+ bool "ChipIdea driver debug"
+ help
+ Say Y here to enable debugging output of the ChipIdea driver.
+
+endif
obj-$(CONFIG_USB_CHIPIDEA) += ci_hdrc.o
-ci_hdrc-y := ci13xxx_udc.o
+ci_hdrc-y := core.o
+ci_hdrc-$(CONFIG_USB_CHIPIDEA_UDC) += udc.o
+ci_hdrc-$(CONFIG_USB_CHIPIDEA_DEBUG) += debug.o
ifneq ($(CONFIG_PCI),)
obj-$(CONFIG_USB_CHIPIDEA) += ci13xxx_pci.o
--- /dev/null
+/*
+ * bits.h - register bits of the ChipIdea USB IP core
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_BITS_H
+#define __DRIVERS_USB_CHIPIDEA_BITS_H
+
+/* HCCPARAMS */
+#define HCCPARAMS_LEN BIT(17)
+
+/* DCCPARAMS */
+#define DCCPARAMS_DEN (0x1F << 0)
+#define DCCPARAMS_DC BIT(7)
+
+/* TESTMODE */
+#define TESTMODE_FORCE BIT(0)
+
+/* USBCMD */
+#define USBCMD_RS BIT(0)
+#define USBCMD_RST BIT(1)
+#define USBCMD_SUTW BIT(13)
+#define USBCMD_ATDTW BIT(14)
+
+/* USBSTS & USBINTR */
+#define USBi_UI BIT(0)
+#define USBi_UEI BIT(1)
+#define USBi_PCI BIT(2)
+#define USBi_URI BIT(6)
+#define USBi_SLI BIT(8)
+
+/* DEVICEADDR */
+#define DEVICEADDR_USBADRA BIT(24)
+#define DEVICEADDR_USBADR (0x7FUL << 25)
+
+/* PORTSC */
+#define PORTSC_FPR BIT(6)
+#define PORTSC_SUSP BIT(7)
+#define PORTSC_HSP BIT(9)
+#define PORTSC_PTC (0x0FUL << 16)
+
+/* DEVLC */
+#define DEVLC_PSPD (0x03UL << 25)
+#define DEVLC_PSPD_HS (0x02UL << 25)
+
+/* USBMODE */
+#define USBMODE_CM (0x03UL << 0)
+#define USBMODE_CM_IDLE (0x00UL << 0)
+#define USBMODE_CM_DEVICE (0x02UL << 0)
+#define USBMODE_CM_HOST (0x03UL << 0)
+#define USBMODE_SLOM BIT(3)
+#define USBMODE_SDIS BIT(4)
+
+/* ENDPTCTRL */
+#define ENDPTCTRL_RXS BIT(0)
+#define ENDPTCTRL_RXT (0x03UL << 2)
+#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
+#define ENDPTCTRL_RXE BIT(7)
+#define ENDPTCTRL_TXS BIT(16)
+#define ENDPTCTRL_TXT (0x03UL << 18)
+#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
+#define ENDPTCTRL_TXE BIT(23)
+
+#endif /* __DRIVERS_USB_CHIPIDEA_BITS_H */
--- /dev/null
+/*
+ * ci.h - common structures, functions, and macros of the ChipIdea driver
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_CI_H
+#define __DRIVERS_USB_CHIPIDEA_CI_H
+
+#include <linux/list.h>
+#include <linux/usb/gadget.h>
+
+/******************************************************************************
+ * DEFINE
+ *****************************************************************************/
+#define DMA_ADDR_INVALID (~(dma_addr_t)0)
+#define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */
+#define ENDPT_MAX 32
+
+/******************************************************************************
+ * STRUCTURES
+ *****************************************************************************/
+/* Extension of usb_ep */
+struct ci13xxx_ep {
+ struct usb_ep ep;
+ u8 dir;
+ u8 num;
+ u8 type;
+ char name[16];
+ struct {
+ struct list_head queue;
+ struct ci13xxx_qh *ptr;
+ dma_addr_t dma;
+ } qh;
+ int wedge;
+
+ /* global resources */
+ struct ci13xxx *udc;
+ spinlock_t *lock;
+ struct device *device;
+ struct dma_pool *td_pool;
+};
+
+struct hw_bank {
+ unsigned lpm; /* is LPM? */
+ void __iomem *abs; /* bus map offset */
+ void __iomem *cap; /* bus map offset + CAP offset */
+ void __iomem *op; /* bus map offset + OP offset */
+ size_t size; /* bank size */
+ void __iomem **regmap;
+};
+
+/* CI13XXX UDC descriptor & global resources */
+struct ci13xxx {
+ spinlock_t lock; /* ctrl register bank access */
+ void __iomem *regs; /* registers address space */
+
+ struct dma_pool *qh_pool; /* DMA pool for queue heads */
+ struct dma_pool *td_pool; /* DMA pool for transfer descs */
+ struct usb_request *status; /* ep0 status request */
+
+ struct device *dev;
+ struct usb_gadget gadget; /* USB slave device */
+ struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
+ u32 ep0_dir; /* ep0 direction */
+ struct ci13xxx_ep *ep0out, *ep0in;
+ unsigned hw_ep_max; /* number of hw endpoints */
+
+ bool setaddr;
+ u8 address;
+ u8 remote_wakeup; /* Is remote wakeup feature
+ enabled by the host? */
+ u8 suspended; /* suspended by the host */
+ u8 test_mode; /* the selected test mode */
+
+ struct hw_bank hw_bank;
+ int irq;
+ struct usb_gadget_driver *driver; /* 3rd party gadget driver */
+ struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
+ int vbus_active; /* is VBUS active */
+ struct usb_phy *transceiver; /* Transceiver struct */
+};
+
+/******************************************************************************
+ * REGISTERS
+ *****************************************************************************/
+/* register size */
+#define REG_BITS (32)
+
+/* register indices */
+enum ci13xxx_regs {
+ CAP_CAPLENGTH,
+ CAP_HCCPARAMS,
+ CAP_DCCPARAMS,
+ CAP_TESTMODE,
+ CAP_LAST = CAP_TESTMODE,
+ OP_USBCMD,
+ OP_USBSTS,
+ OP_USBINTR,
+ OP_DEVICEADDR,
+ OP_ENDPTLISTADDR,
+ OP_PORTSC,
+ OP_DEVLC,
+ OP_USBMODE,
+ OP_ENDPTSETUPSTAT,
+ OP_ENDPTPRIME,
+ OP_ENDPTFLUSH,
+ OP_ENDPTSTAT,
+ OP_ENDPTCOMPLETE,
+ OP_ENDPTCTRL,
+ /* endptctrl1..15 follow */
+ OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
+};
+
+
+/**
+ * ffs_nr: find first (least significant) bit set
+ * @x: the word to search
+ *
+ * This function returns bit number (instead of position)
+ */
+static inline int ffs_nr(u32 x)
+{
+ int n = ffs(x);
+
+ return n ? n-1 : 32;
+}
+
+/**
+ * hw_read: reads from a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_read(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask)
+{
+ return ioread32(udc->hw_bank.regmap[reg]) & mask;
+}
+
+/**
+ * hw_write: writes to a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ * @data: new value
+ */
+static inline void hw_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask, u32 data)
+{
+ if (~mask)
+ data = (ioread32(udc->hw_bank.regmap[reg]) & ~mask)
+ | (data & mask);
+
+ iowrite32(data, udc->hw_bank.regmap[reg]);
+}
+
+/**
+ * hw_test_and_clear: tests & clears a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_clear(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask)
+{
+ u32 val = ioread32(udc->hw_bank.regmap[reg]) & mask;
+
+ iowrite32(val, udc->hw_bank.regmap[reg]);
+ return val;
+}
+
+/**
+ * hw_test_and_write: tests & writes a hw register
+ * @reg: register index
+ * @mask: bitfield mask
+ * @data: new value
+ *
+ * This function returns register contents
+ */
+static inline u32 hw_test_and_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
+ u32 mask, u32 data)
+{
+ u32 val = hw_read(udc, reg, ~0);
+
+ hw_write(udc, reg, mask, data);
+ return (val & mask) >> ffs_nr(mask);
+}
+
+int hw_device_init(struct ci13xxx *udc, void __iomem *base,
+ uintptr_t cap_offset);
+int hw_device_reset(struct ci13xxx *ci);
+
+int hw_port_test_set(struct ci13xxx *ci, u8 mode);
+
+u8 hw_port_test_get(struct ci13xxx *ci);
+
+#endif /* __DRIVERS_USB_CHIPIDEA_CI_H */
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
+#include <linux/usb/chipidea.h>
-#include "ci13xxx_udc.h"
+#include "ci.h"
#define MSM_USB_BASE (udc->regs)
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/usb/gadget.h>
-
-#include "ci13xxx_udc.h"
+#include <linux/usb/chipidea.h>
/* driver name */
#define UDC_DRIVER_NAME "ci13xxx_pci"
+++ /dev/null
-/*
- * ci13xxx_udc.c - MIPS USB IP core family device controller
- *
- * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
- *
- * Author: David Lopo
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/*
- * Description: MIPS USB IP core family device controller
- * Currently it only supports IP part number CI13412
- *
- * This driver is composed of several blocks:
- * - HW: hardware interface
- * - DBG: debug facilities (optional)
- * - UTIL: utilities
- * - ISR: interrupts handling
- * - ENDPT: endpoint operations (Gadget API)
- * - GADGET: gadget operations (Gadget API)
- * - BUS: bus glue code, bus abstraction layer
- *
- * Compile Options
- * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
- * - STALL_IN: non-empty bulk-in pipes cannot be halted
- * if defined mass storage compliance succeeds but with warnings
- * => case 4: Hi > Dn
- * => case 5: Hi > Di
- * => case 8: Hi <> Do
- * if undefined usbtest 13 fails
- * - TRACE: enable function tracing (depends on DEBUG)
- *
- * Main Features
- * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
- * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
- * - Normal & LPM support
- *
- * USBTEST Report
- * - OK: 0-12, 13 (STALL_IN defined) & 14
- * - Not Supported: 15 & 16 (ISO)
- *
- * TODO List
- * - OTG
- * - Isochronous & Interrupt Traffic
- * - Handle requests which spawns into several TDs
- * - GET_STATUS(device) - always reports 0
- * - Gadget API (majority of optional features)
- * - Suspend & Remote Wakeup
- */
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/dmapool.h>
-#include <linux/dma-mapping.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/module.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/pm_runtime.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-
-#include "ci13xxx_udc.h"
-
-/******************************************************************************
- * DEFINE
- *****************************************************************************/
-
-#define DMA_ADDR_INVALID (~(dma_addr_t)0)
-
-/* control endpoint description */
-static const struct usb_endpoint_descriptor
-ctrl_endpt_out_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_OUT,
- .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
- .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
-};
-
-static const struct usb_endpoint_descriptor
-ctrl_endpt_in_desc = {
- .bLength = USB_DT_ENDPOINT_SIZE,
- .bDescriptorType = USB_DT_ENDPOINT,
-
- .bEndpointAddress = USB_DIR_IN,
- .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
- .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
-};
-
-/* Interrupt statistics */
-#define ISR_MASK 0x1F
-static struct {
- u32 test;
- u32 ui;
- u32 uei;
- u32 pci;
- u32 uri;
- u32 sli;
- u32 none;
- struct {
- u32 cnt;
- u32 buf[ISR_MASK+1];
- u32 idx;
- } hndl;
-} isr_statistics;
-
-/**
- * ffs_nr: find first (least significant) bit set
- * @x: the word to search
- *
- * This function returns bit number (instead of position)
- */
-static int ffs_nr(u32 x)
-{
- int n = ffs(x);
-
- return n ? n-1 : 32;
-}
-
-/******************************************************************************
- * HW block
- *****************************************************************************/
-
-/* MSM specific */
-#define ABS_AHBBURST (0x0090UL)
-#define ABS_AHBMODE (0x0098UL)
-/* UDC register map */
-static uintptr_t ci_regs_nolpm[] = {
- [CAP_CAPLENGTH] = 0x000UL,
- [CAP_HCCPARAMS] = 0x008UL,
- [CAP_DCCPARAMS] = 0x024UL,
- [CAP_TESTMODE] = 0x038UL,
- [OP_USBCMD] = 0x000UL,
- [OP_USBSTS] = 0x004UL,
- [OP_USBINTR] = 0x008UL,
- [OP_DEVICEADDR] = 0x014UL,
- [OP_ENDPTLISTADDR] = 0x018UL,
- [OP_PORTSC] = 0x044UL,
- [OP_DEVLC] = 0x084UL,
- [OP_USBMODE] = 0x068UL,
- [OP_ENDPTSETUPSTAT] = 0x06CUL,
- [OP_ENDPTPRIME] = 0x070UL,
- [OP_ENDPTFLUSH] = 0x074UL,
- [OP_ENDPTSTAT] = 0x078UL,
- [OP_ENDPTCOMPLETE] = 0x07CUL,
- [OP_ENDPTCTRL] = 0x080UL,
-};
-
-static uintptr_t ci_regs_lpm[] = {
- [CAP_CAPLENGTH] = 0x000UL,
- [CAP_HCCPARAMS] = 0x008UL,
- [CAP_DCCPARAMS] = 0x024UL,
- [CAP_TESTMODE] = 0x0FCUL,
- [OP_USBCMD] = 0x000UL,
- [OP_USBSTS] = 0x004UL,
- [OP_USBINTR] = 0x008UL,
- [OP_DEVICEADDR] = 0x014UL,
- [OP_ENDPTLISTADDR] = 0x018UL,
- [OP_PORTSC] = 0x044UL,
- [OP_DEVLC] = 0x084UL,
- [OP_USBMODE] = 0x0C8UL,
- [OP_ENDPTSETUPSTAT] = 0x0D8UL,
- [OP_ENDPTPRIME] = 0x0DCUL,
- [OP_ENDPTFLUSH] = 0x0E0UL,
- [OP_ENDPTSTAT] = 0x0E4UL,
- [OP_ENDPTCOMPLETE] = 0x0E8UL,
- [OP_ENDPTCTRL] = 0x0ECUL,
-};
-
-static int hw_alloc_regmap(struct ci13xxx *udc, bool is_lpm)
-{
- int i;
-
- kfree(udc->hw_bank.regmap);
-
- udc->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *),
- GFP_KERNEL);
- if (!udc->hw_bank.regmap)
- return -ENOMEM;
-
- for (i = 0; i < OP_ENDPTCTRL; i++)
- udc->hw_bank.regmap[i] =
- (i <= CAP_LAST ? udc->hw_bank.cap : udc->hw_bank.op) +
- (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
-
- for (; i <= OP_LAST; i++)
- udc->hw_bank.regmap[i] = udc->hw_bank.op +
- 4 * (i - OP_ENDPTCTRL) +
- (is_lpm
- ? ci_regs_lpm[OP_ENDPTCTRL]
- : ci_regs_nolpm[OP_ENDPTCTRL]);
-
- return 0;
-}
-
-/**
- * hw_ep_bit: calculates the bit number
- * @num: endpoint number
- * @dir: endpoint direction
- *
- * This function returns bit number
- */
-static inline int hw_ep_bit(int num, int dir)
-{
- return num + (dir ? 16 : 0);
-}
-
-static int ep_to_bit(struct ci13xxx *udc, int n)
-{
- int fill = 16 - udc->hw_ep_max / 2;
-
- if (n >= udc->hw_ep_max / 2)
- n += fill;
-
- return n;
-}
-
-/**
- * hw_read: reads from a hw register
- * @reg: register index
- * @mask: bitfield mask
- *
- * This function returns register contents
- */
-static u32 hw_read(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask)
-{
- return ioread32(udc->hw_bank.regmap[reg]) & mask;
-}
-
-/**
- * hw_write: writes to a hw register
- * @reg: register index
- * @mask: bitfield mask
- * @data: new value
- */
-static void hw_write(struct ci13xxx *udc, enum ci13xxx_regs reg, u32 mask,
- u32 data)
-{
- if (~mask)
- data = (ioread32(udc->hw_bank.regmap[reg]) & ~mask)
- | (data & mask);
-
- iowrite32(data, udc->hw_bank.regmap[reg]);
-}
-
-/**
- * hw_test_and_clear: tests & clears a hw register
- * @reg: register index
- * @mask: bitfield mask
- *
- * This function returns register contents
- */
-static u32 hw_test_and_clear(struct ci13xxx *udc, enum ci13xxx_regs reg,
- u32 mask)
-{
- u32 val = ioread32(udc->hw_bank.regmap[reg]) & mask;
-
- iowrite32(val, udc->hw_bank.regmap[reg]);
- return val;
-}
-
-/**
- * hw_test_and_write: tests & writes a hw register
- * @reg: register index
- * @mask: bitfield mask
- * @data: new value
- *
- * This function returns register contents
- */
-static u32 hw_test_and_write(struct ci13xxx *udc, enum ci13xxx_regs reg,
- u32 mask, u32 data)
-{
- u32 val = hw_read(udc, reg, ~0);
-
- hw_write(udc, reg, mask, data);
- return (val & mask) >> ffs_nr(mask);
-}
-
-static int hw_device_init(struct ci13xxx *udc, void __iomem *base,
- uintptr_t cap_offset)
-{
- u32 reg;
-
- /* bank is a module variable */
- udc->hw_bank.abs = base;
-
- udc->hw_bank.cap = udc->hw_bank.abs;
- udc->hw_bank.cap += cap_offset;
- udc->hw_bank.op = udc->hw_bank.cap + ioread8(udc->hw_bank.cap);
-
- hw_alloc_regmap(udc, false);
- reg = hw_read(udc, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
- ffs_nr(HCCPARAMS_LEN);
- udc->hw_bank.lpm = reg;
- hw_alloc_regmap(udc, !!reg);
- udc->hw_bank.size = udc->hw_bank.op - udc->hw_bank.abs;
- udc->hw_bank.size += OP_LAST;
- udc->hw_bank.size /= sizeof(u32);
-
- reg = hw_read(udc, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
- ffs_nr(DCCPARAMS_DEN);
- udc->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
-
- if (udc->hw_ep_max == 0 || udc->hw_ep_max > ENDPT_MAX)
- return -ENODEV;
-
- dev_dbg(udc->dev, "ChipIdea UDC found, lpm: %d; cap: %p op: %p\n",
- udc->hw_bank.lpm, udc->hw_bank.cap, udc->hw_bank.op);
-
- /* setup lock mode ? */
-
- /* ENDPTSETUPSTAT is '0' by default */
-
- /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
-
- return 0;
-}
-/**
- * hw_device_reset: resets chip (execute without interruption)
- * @base: register base address
- *
- * This function returns an error code
- */
-static int hw_device_reset(struct ci13xxx *udc)
-{
- /* should flush & stop before reset */
- hw_write(udc, OP_ENDPTFLUSH, ~0, ~0);
- hw_write(udc, OP_USBCMD, USBCMD_RS, 0);
-
- hw_write(udc, OP_USBCMD, USBCMD_RST, USBCMD_RST);
- while (hw_read(udc, OP_USBCMD, USBCMD_RST))
- udelay(10); /* not RTOS friendly */
-
-
- if (udc->udc_driver->notify_event)
- udc->udc_driver->notify_event(udc,
- CI13XXX_CONTROLLER_RESET_EVENT);
-
- if (udc->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
- hw_write(udc, OP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
-
- /* USBMODE should be configured step by step */
- hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
- hw_write(udc, OP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
- /* HW >= 2.3 */
- hw_write(udc, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
-
- if (hw_read(udc, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
- pr_err("cannot enter in device mode");
- pr_err("lpm = %i", udc->hw_bank.lpm);
- return -ENODEV;
- }
-
- return 0;
-}
-
-/**
- * hw_device_state: enables/disables interrupts & starts/stops device (execute
- * without interruption)
- * @dma: 0 => disable, !0 => enable and set dma engine
- *
- * This function returns an error code
- */
-static int hw_device_state(struct ci13xxx *udc, u32 dma)
-{
- if (dma) {
- hw_write(udc, OP_ENDPTLISTADDR, ~0, dma);
- /* interrupt, error, port change, reset, sleep/suspend */
- hw_write(udc, OP_USBINTR, ~0,
- USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
- hw_write(udc, OP_USBCMD, USBCMD_RS, USBCMD_RS);
- } else {
- hw_write(udc, OP_USBCMD, USBCMD_RS, 0);
- hw_write(udc, OP_USBINTR, ~0, 0);
- }
- return 0;
-}
-
-/**
- * hw_ep_flush: flush endpoint fifo (execute without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- *
- * This function returns an error code
- */
-static int hw_ep_flush(struct ci13xxx *udc, int num, int dir)
-{
- int n = hw_ep_bit(num, dir);
-
- do {
- /* flush any pending transfer */
- hw_write(udc, OP_ENDPTFLUSH, BIT(n), BIT(n));
- while (hw_read(udc, OP_ENDPTFLUSH, BIT(n)))
- cpu_relax();
- } while (hw_read(udc, OP_ENDPTSTAT, BIT(n)));
-
- return 0;
-}
-
-/**
- * hw_ep_disable: disables endpoint (execute without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- *
- * This function returns an error code
- */
-static int hw_ep_disable(struct ci13xxx *udc, int num, int dir)
-{
- hw_ep_flush(udc, num, dir);
- hw_write(udc, OP_ENDPTCTRL + num,
- dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
- return 0;
-}
-
-/**
- * hw_ep_enable: enables endpoint (execute without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- * @type: endpoint type
- *
- * This function returns an error code
- */
-static int hw_ep_enable(struct ci13xxx *udc, int num, int dir, int type)
-{
- u32 mask, data;
-
- if (dir) {
- mask = ENDPTCTRL_TXT; /* type */
- data = type << ffs_nr(mask);
-
- mask |= ENDPTCTRL_TXS; /* unstall */
- mask |= ENDPTCTRL_TXR; /* reset data toggle */
- data |= ENDPTCTRL_TXR;
- mask |= ENDPTCTRL_TXE; /* enable */
- data |= ENDPTCTRL_TXE;
- } else {
- mask = ENDPTCTRL_RXT; /* type */
- data = type << ffs_nr(mask);
-
- mask |= ENDPTCTRL_RXS; /* unstall */
- mask |= ENDPTCTRL_RXR; /* reset data toggle */
- data |= ENDPTCTRL_RXR;
- mask |= ENDPTCTRL_RXE; /* enable */
- data |= ENDPTCTRL_RXE;
- }
- hw_write(udc, OP_ENDPTCTRL + num, mask, data);
- return 0;
-}
-
-/**
- * hw_ep_get_halt: return endpoint halt status
- * @num: endpoint number
- * @dir: endpoint direction
- *
- * This function returns 1 if endpoint halted
- */
-static int hw_ep_get_halt(struct ci13xxx *udc, int num, int dir)
-{
- u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
-
- return hw_read(udc, OP_ENDPTCTRL + num, mask) ? 1 : 0;
-}
-
-/**
- * hw_test_and_clear_setup_status: test & clear setup status (execute without
- * interruption)
- * @n: endpoint number
- *
- * This function returns setup status
- */
-static int hw_test_and_clear_setup_status(struct ci13xxx *udc, int n)
-{
- n = ep_to_bit(udc, n);
- return hw_test_and_clear(udc, OP_ENDPTSETUPSTAT, BIT(n));
-}
-
-/**
- * hw_ep_prime: primes endpoint (execute without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- * @is_ctrl: true if control endpoint
- *
- * This function returns an error code
- */
-static int hw_ep_prime(struct ci13xxx *udc, int num, int dir, int is_ctrl)
-{
- int n = hw_ep_bit(num, dir);
-
- if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num)))
- return -EAGAIN;
-
- hw_write(udc, OP_ENDPTPRIME, BIT(n), BIT(n));
-
- while (hw_read(udc, OP_ENDPTPRIME, BIT(n)))
- cpu_relax();
- if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num)))
- return -EAGAIN;
-
- /* status shoult be tested according with manual but it doesn't work */
- return 0;
-}
-
-/**
- * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
- * without interruption)
- * @num: endpoint number
- * @dir: endpoint direction
- * @value: true => stall, false => unstall
- *
- * This function returns an error code
- */
-static int hw_ep_set_halt(struct ci13xxx *udc, int num, int dir, int value)
-{
- if (value != 0 && value != 1)
- return -EINVAL;
-
- do {
- enum ci13xxx_regs reg = OP_ENDPTCTRL + num;
- u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
- u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
-
- /* data toggle - reserved for EP0 but it's in ESS */
- hw_write(udc, reg, mask_xs|mask_xr,
- value ? mask_xs : mask_xr);
- } while (value != hw_ep_get_halt(udc, num, dir));
-
- return 0;
-}
-
-/**
- * hw_intr_clear: disables interrupt & clears interrupt status (execute without
- * interruption)
- * @n: interrupt bit
- *
- * This function returns an error code
- */
-static int hw_intr_clear(struct ci13xxx *udc, int n)
-{
- if (n >= REG_BITS)
- return -EINVAL;
-
- hw_write(udc, OP_USBINTR, BIT(n), 0);
- hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
- return 0;
-}
-
-/**
- * hw_intr_force: enables interrupt & forces interrupt status (execute without
- * interruption)
- * @n: interrupt bit
- *
- * This function returns an error code
- */
-static int hw_intr_force(struct ci13xxx *udc, int n)
-{
- if (n >= REG_BITS)
- return -EINVAL;
-
- hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
- hw_write(udc, OP_USBINTR, BIT(n), BIT(n));
- hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
- hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, 0);
- return 0;
-}
-
-/**
- * hw_is_port_high_speed: test if port is high speed
- *
- * This function returns true if high speed port
- */
-static int hw_port_is_high_speed(struct ci13xxx *udc)
-{
- return udc->hw_bank.lpm ? hw_read(udc, OP_DEVLC, DEVLC_PSPD) :
- hw_read(udc, OP_PORTSC, PORTSC_HSP);
-}
-
-/**
- * hw_port_test_get: reads port test mode value
- *
- * This function returns port test mode value
- */
-static u8 hw_port_test_get(struct ci13xxx *udc)
-{
- return hw_read(udc, OP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
-}
-
-/**
- * hw_port_test_set: writes port test mode (execute without interruption)
- * @mode: new value
- *
- * This function returns an error code
- */
-static int hw_port_test_set(struct ci13xxx *udc, u8 mode)
-{
- const u8 TEST_MODE_MAX = 7;
-
- if (mode > TEST_MODE_MAX)
- return -EINVAL;
-
- hw_write(udc, OP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
- return 0;
-}
-
-/**
- * hw_read_intr_enable: returns interrupt enable register
- *
- * This function returns register data
- */
-static u32 hw_read_intr_enable(struct ci13xxx *udc)
-{
- return hw_read(udc, OP_USBINTR, ~0);
-}
-
-/**
- * hw_read_intr_status: returns interrupt status register
- *
- * This function returns register data
- */
-static u32 hw_read_intr_status(struct ci13xxx *udc)
-{
- return hw_read(udc, OP_USBSTS, ~0);
-}
-
-/**
- * hw_register_read: reads all device registers (execute without interruption)
- * @buf: destination buffer
- * @size: buffer size
- *
- * This function returns number of registers read
- */
-static size_t hw_register_read(struct ci13xxx *udc, u32 *buf, size_t size)
-{
- unsigned i;
-
- if (size > udc->hw_bank.size)
- size = udc->hw_bank.size;
-
- for (i = 0; i < size; i++)
- buf[i] = hw_read(udc, i * sizeof(u32), ~0);
-
- return size;
-}
-
-/**
- * hw_register_write: writes to register
- * @addr: register address
- * @data: register value
- *
- * This function returns an error code
- */
-static int hw_register_write(struct ci13xxx *udc, u16 addr, u32 data)
-{
- /* align */
- addr /= sizeof(u32);
-
- if (addr >= udc->hw_bank.size)
- return -EINVAL;
-
- /* align */
- addr *= sizeof(u32);
-
- hw_write(udc, addr, ~0, data);
- return 0;
-}
-
-/**
- * hw_test_and_clear_complete: test & clear complete status (execute without
- * interruption)
- * @n: endpoint number
- *
- * This function returns complete status
- */
-static int hw_test_and_clear_complete(struct ci13xxx *udc, int n)
-{
- n = ep_to_bit(udc, n);
- return hw_test_and_clear(udc, OP_ENDPTCOMPLETE, BIT(n));
-}
-
-/**
- * hw_test_and_clear_intr_active: test & clear active interrupts (execute
- * without interruption)
- *
- * This function returns active interrutps
- */
-static u32 hw_test_and_clear_intr_active(struct ci13xxx *udc)
-{
- u32 reg = hw_read_intr_status(udc) & hw_read_intr_enable(udc);
-
- hw_write(udc, OP_USBSTS, ~0, reg);
- return reg;
-}
-
-/**
- * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
- * interruption)
- *
- * This function returns guard value
- */
-static int hw_test_and_clear_setup_guard(struct ci13xxx *udc)
-{
- return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, 0);
-}
-
-/**
- * hw_test_and_set_setup_guard: test & set setup guard (execute without
- * interruption)
- *
- * This function returns guard value
- */
-static int hw_test_and_set_setup_guard(struct ci13xxx *udc)
-{
- return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
-}
-
-/**
- * hw_usb_set_address: configures USB address (execute without interruption)
- * @value: new USB address
- *
- * This function explicitly sets the address, without the "USBADRA" (advance)
- * feature, which is not supported by older versions of the controller.
- */
-static void hw_usb_set_address(struct ci13xxx *udc, u8 value)
-{
- hw_write(udc, OP_DEVICEADDR, DEVICEADDR_USBADR,
- value << ffs_nr(DEVICEADDR_USBADR));
-}
-
-/**
- * hw_usb_reset: restart device after a bus reset (execute without
- * interruption)
- *
- * This function returns an error code
- */
-static int hw_usb_reset(struct ci13xxx *udc)
-{
- hw_usb_set_address(udc, 0);
-
- /* ESS flushes only at end?!? */
- hw_write(udc, OP_ENDPTFLUSH, ~0, ~0);
-
- /* clear setup token semaphores */
- hw_write(udc, OP_ENDPTSETUPSTAT, 0, 0);
-
- /* clear complete status */
- hw_write(udc, OP_ENDPTCOMPLETE, 0, 0);
-
- /* wait until all bits cleared */
- while (hw_read(udc, OP_ENDPTPRIME, ~0))
- udelay(10); /* not RTOS friendly */
-
- /* reset all endpoints ? */
-
- /* reset internal status and wait for further instructions
- no need to verify the port reset status (ESS does it) */
-
- return 0;
-}
-
-/******************************************************************************
- * DBG block
- *****************************************************************************/
-/**
- * show_device: prints information about device capabilities and status
- *
- * Check "device.h" for details
- */
-static ssize_t show_device(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- struct usb_gadget *gadget = &udc->gadget;
- int n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
- gadget->speed);
- n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed = %d\n",
- gadget->max_speed);
- /* TODO: Scheduled for removal in 3.8. */
- n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
- gadget_is_dualspeed(gadget));
- n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
- gadget->is_otg);
- n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
- gadget->is_a_peripheral);
- n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
- gadget->b_hnp_enable);
- n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
- gadget->a_hnp_support);
- n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
- gadget->a_alt_hnp_support);
- n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
- (gadget->name ? gadget->name : ""));
-
- return n;
-}
-static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
-
-/**
- * show_driver: prints information about attached gadget (if any)
- *
- * Check "device.h" for details
- */
-static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- struct usb_gadget_driver *driver = udc->driver;
- int n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- if (driver == NULL)
- return scnprintf(buf, PAGE_SIZE,
- "There is no gadget attached!\n");
-
- n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
- (driver->function ? driver->function : ""));
- n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
- driver->max_speed);
-
- return n;
-}
-static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
-
-/* Maximum event message length */
-#define DBG_DATA_MSG 64UL
-
-/* Maximum event messages */
-#define DBG_DATA_MAX 128UL
-
-/* Event buffer descriptor */
-static struct {
- char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
- unsigned idx; /* index */
- unsigned tty; /* print to console? */
- rwlock_t lck; /* lock */
-} dbg_data = {
- .idx = 0,
- .tty = 0,
- .lck = __RW_LOCK_UNLOCKED(lck)
-};
-
-/**
- * dbg_dec: decrements debug event index
- * @idx: buffer index
- */
-static void dbg_dec(unsigned *idx)
-{
- *idx = (*idx - 1) & (DBG_DATA_MAX-1);
-}
-
-/**
- * dbg_inc: increments debug event index
- * @idx: buffer index
- */
-static void dbg_inc(unsigned *idx)
-{
- *idx = (*idx + 1) & (DBG_DATA_MAX-1);
-}
-
-/**
- * dbg_print: prints the common part of the event
- * @addr: endpoint address
- * @name: event name
- * @status: status
- * @extra: extra information
- */
-static void dbg_print(u8 addr, const char *name, int status, const char *extra)
-{
- struct timeval tval;
- unsigned int stamp;
- unsigned long flags;
-
- write_lock_irqsave(&dbg_data.lck, flags);
-
- do_gettimeofday(&tval);
- stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
- stamp = stamp * 1000000 + tval.tv_usec;
-
- scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
- "%04X\t? %02X %-7.7s %4i ?\t%s\n",
- stamp, addr, name, status, extra);
-
- dbg_inc(&dbg_data.idx);
-
- write_unlock_irqrestore(&dbg_data.lck, flags);
-
- if (dbg_data.tty != 0)
- pr_notice("%04X\t? %02X %-7.7s %4i ?\t%s\n",
- stamp, addr, name, status, extra);
-}
-
-/**
- * dbg_done: prints a DONE event
- * @addr: endpoint address
- * @td: transfer descriptor
- * @status: status
- */
-static void dbg_done(u8 addr, const u32 token, int status)
-{
- char msg[DBG_DATA_MSG];
-
- scnprintf(msg, sizeof(msg), "%d %02X",
- (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
- (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
- dbg_print(addr, "DONE", status, msg);
-}
-
-/**
- * dbg_event: prints a generic event
- * @addr: endpoint address
- * @name: event name
- * @status: status
- */
-static void dbg_event(u8 addr, const char *name, int status)
-{
- if (name != NULL)
- dbg_print(addr, name, status, "");
-}
-
-/*
- * dbg_queue: prints a QUEUE event
- * @addr: endpoint address
- * @req: USB request
- * @status: status
- */
-static void dbg_queue(u8 addr, const struct usb_request *req, int status)
-{
- char msg[DBG_DATA_MSG];
-
- if (req != NULL) {
- scnprintf(msg, sizeof(msg),
- "%d %d", !req->no_interrupt, req->length);
- dbg_print(addr, "QUEUE", status, msg);
- }
-}
-
-/**
- * dbg_setup: prints a SETUP event
- * @addr: endpoint address
- * @req: setup request
- */
-static void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
-{
- char msg[DBG_DATA_MSG];
-
- if (req != NULL) {
- scnprintf(msg, sizeof(msg),
- "%02X %02X %04X %04X %d", req->bRequestType,
- req->bRequest, le16_to_cpu(req->wValue),
- le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
- dbg_print(addr, "SETUP", 0, msg);
- }
-}
-
-/**
- * show_events: displays the event buffer
- *
- * Check "device.h" for details
- */
-static ssize_t show_events(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- unsigned long flags;
- unsigned i, j, n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(dev->parent, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- read_lock_irqsave(&dbg_data.lck, flags);
-
- i = dbg_data.idx;
- for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
- n += strlen(dbg_data.buf[i]);
- if (n >= PAGE_SIZE) {
- n -= strlen(dbg_data.buf[i]);
- break;
- }
- }
- for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
- j += scnprintf(buf + j, PAGE_SIZE - j,
- "%s", dbg_data.buf[i]);
-
- read_unlock_irqrestore(&dbg_data.lck, flags);
-
- return n;
-}
-
-/**
- * store_events: configure if events are going to be also printed to console
- *
- * Check "device.h" for details
- */
-static ssize_t store_events(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- unsigned tty;
-
- if (attr == NULL || buf == NULL) {
- dev_err(dev, "[%s] EINVAL\n", __func__);
- goto done;
- }
-
- if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
- dev_err(dev, "<1|0>: enable|disable console log\n");
- goto done;
- }
-
- dbg_data.tty = tty;
- dev_info(dev, "tty = %u", dbg_data.tty);
-
- done:
- return count;
-}
-static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
-
-/**
- * show_inters: interrupt status, enable status and historic
- *
- * Check "device.h" for details
- */
-static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- u32 intr;
- unsigned i, j, n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
-
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "status = %08x\n", hw_read_intr_status(udc));
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "enable = %08x\n", hw_read_intr_enable(udc));
-
- n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
- isr_statistics.test);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
- isr_statistics.ui);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
- isr_statistics.uei);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
- isr_statistics.pci);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
- isr_statistics.uri);
- n += scnprintf(buf + n, PAGE_SIZE - n, "? sli = %d\n",
- isr_statistics.sli);
- n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
- isr_statistics.none);
- n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
- isr_statistics.hndl.cnt);
-
- for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
- i &= ISR_MASK;
- intr = isr_statistics.hndl.buf[i];
-
- if (USBi_UI & intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
- intr &= ~USBi_UI;
- if (USBi_UEI & intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
- intr &= ~USBi_UEI;
- if (USBi_PCI & intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
- intr &= ~USBi_PCI;
- if (USBi_URI & intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
- intr &= ~USBi_URI;
- if (USBi_SLI & intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
- intr &= ~USBi_SLI;
- if (intr)
- n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
- if (isr_statistics.hndl.buf[i])
- n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
- }
-
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return n;
-}
-
-/**
- * store_inters: enable & force or disable an individual interrutps
- * (to be used for test purposes only)
- *
- * Check "device.h" for details
- */
-static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- unsigned en, bit;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "EINVAL\n");
- goto done;
- }
-
- if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
- dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (en) {
- if (hw_intr_force(udc, bit))
- dev_err(dev, "invalid bit number\n");
- else
- isr_statistics.test++;
- } else {
- if (hw_intr_clear(udc, bit))
- dev_err(dev, "invalid bit number\n");
- }
- spin_unlock_irqrestore(&udc->lock, flags);
-
- done:
- return count;
-}
-static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
-
-/**
- * show_port_test: reads port test mode
- *
- * Check "device.h" for details
- */
-static ssize_t show_port_test(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- unsigned mode;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "EINVAL\n");
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- mode = hw_port_test_get(udc);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
-}
-
-/**
- * store_port_test: writes port test mode
- *
- * Check "device.h" for details
- */
-static ssize_t store_port_test(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- unsigned mode;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- goto done;
- }
-
- if (sscanf(buf, "%u", &mode) != 1) {
- dev_err(udc->dev, "<mode>: set port test mode");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (hw_port_test_set(udc, mode))
- dev_err(udc->dev, "invalid mode\n");
- spin_unlock_irqrestore(&udc->lock, flags);
-
- done:
- return count;
-}
-static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
- show_port_test, store_port_test);
-
-/**
- * show_qheads: DMA contents of all queue heads
- *
- * Check "device.h" for details
- */
-static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- unsigned i, j, n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- for (i = 0; i < udc->hw_ep_max/2; i++) {
- struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
- struct ci13xxx_ep *mEpTx =
- &udc->ci13xxx_ep[i + udc->hw_ep_max/2];
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "EP=%02i: RX=%08X TX=%08X\n",
- i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.dma);
- for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
- n += scnprintf(buf + n, PAGE_SIZE - n,
- " %04X: %08X %08X\n", j,
- *((u32 *)mEpRx->qh.ptr + j),
- *((u32 *)mEpTx->qh.ptr + j));
- }
- }
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return n;
-}
-static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
-
-/**
- * show_registers: dumps all registers
- *
- * Check "device.h" for details
- */
-#define DUMP_ENTRIES 512
-static ssize_t show_registers(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- u32 *dump;
- unsigned i, k, n = 0;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
- if (!dump) {
- dev_err(udc->dev, "%s: out of memory\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- k = hw_register_read(udc, dump, DUMP_ENTRIES);
- spin_unlock_irqrestore(&udc->lock, flags);
-
- for (i = 0; i < k; i++) {
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "reg[0x%04X] = 0x%08X\n",
- i * (unsigned)sizeof(u32), dump[i]);
- }
- kfree(dump);
-
- return n;
-}
-
-/**
- * store_registers: writes value to register address
- *
- * Check "device.h" for details
- */
-static ssize_t store_registers(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long addr, data, flags;
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- goto done;
- }
-
- if (sscanf(buf, "%li %li", &addr, &data) != 2) {
- dev_err(udc->dev,
- "<addr> <data>: write data to register address\n");
- goto done;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (hw_register_write(udc, addr, data))
- dev_err(udc->dev, "invalid address range\n");
- spin_unlock_irqrestore(&udc->lock, flags);
-
- done:
- return count;
-}
-static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
- show_registers, store_registers);
-
-/**
- * show_requests: DMA contents of all requests currently queued (all endpts)
- *
- * Check "device.h" for details
- */
-static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
- char *buf)
-{
- struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
- unsigned long flags;
- struct list_head *ptr = NULL;
- struct ci13xxx_req *req = NULL;
- unsigned i, j, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
-
- if (attr == NULL || buf == NULL) {
- dev_err(udc->dev, "[%s] EINVAL\n", __func__);
- return 0;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- for (i = 0; i < udc->hw_ep_max; i++)
- list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
- {
- req = list_entry(ptr, struct ci13xxx_req, queue);
-
- n += scnprintf(buf + n, PAGE_SIZE - n,
- "EP=%02i: TD=%08X %s\n",
- i % udc->hw_ep_max/2, (u32)req->dma,
- ((i < udc->hw_ep_max/2) ? "RX" : "TX"));
-
- for (j = 0; j < qSize; j++)
- n += scnprintf(buf + n, PAGE_SIZE - n,
- " %04X: %08X\n", j,
- *((u32 *)req->ptr + j));
- }
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return n;
-}
-static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
-
-/**
- * dbg_create_files: initializes the attribute interface
- * @dev: device
- *
- * This function returns an error code
- */
-__maybe_unused static int dbg_create_files(struct device *dev)
-{
- int retval = 0;
-
- if (dev == NULL)
- return -EINVAL;
- retval = device_create_file(dev, &dev_attr_device);
- if (retval)
- goto done;
- retval = device_create_file(dev, &dev_attr_driver);
- if (retval)
- goto rm_device;
- retval = device_create_file(dev, &dev_attr_events);
- if (retval)
- goto rm_driver;
- retval = device_create_file(dev, &dev_attr_inters);
- if (retval)
- goto rm_events;
- retval = device_create_file(dev, &dev_attr_port_test);
- if (retval)
- goto rm_inters;
- retval = device_create_file(dev, &dev_attr_qheads);
- if (retval)
- goto rm_port_test;
- retval = device_create_file(dev, &dev_attr_registers);
- if (retval)
- goto rm_qheads;
- retval = device_create_file(dev, &dev_attr_requests);
- if (retval)
- goto rm_registers;
- return 0;
-
- rm_registers:
- device_remove_file(dev, &dev_attr_registers);
- rm_qheads:
- device_remove_file(dev, &dev_attr_qheads);
- rm_port_test:
- device_remove_file(dev, &dev_attr_port_test);
- rm_inters:
- device_remove_file(dev, &dev_attr_inters);
- rm_events:
- device_remove_file(dev, &dev_attr_events);
- rm_driver:
- device_remove_file(dev, &dev_attr_driver);
- rm_device:
- device_remove_file(dev, &dev_attr_device);
- done:
- return retval;
-}
-
-/**
- * dbg_remove_files: destroys the attribute interface
- * @dev: device
- *
- * This function returns an error code
- */
-__maybe_unused static int dbg_remove_files(struct device *dev)
-{
- if (dev == NULL)
- return -EINVAL;
- device_remove_file(dev, &dev_attr_requests);
- device_remove_file(dev, &dev_attr_registers);
- device_remove_file(dev, &dev_attr_qheads);
- device_remove_file(dev, &dev_attr_port_test);
- device_remove_file(dev, &dev_attr_inters);
- device_remove_file(dev, &dev_attr_events);
- device_remove_file(dev, &dev_attr_driver);
- device_remove_file(dev, &dev_attr_device);
- return 0;
-}
-
-/******************************************************************************
- * UTIL block
- *****************************************************************************/
-/**
- * _usb_addr: calculates endpoint address from direction & number
- * @ep: endpoint
- */
-static inline u8 _usb_addr(struct ci13xxx_ep *ep)
-{
- return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
-}
-
-/**
- * _hardware_queue: configures a request at hardware level
- * @gadget: gadget
- * @mEp: endpoint
- *
- * This function returns an error code
- */
-static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
-{
- struct ci13xxx *udc = mEp->udc;
- unsigned i;
- int ret = 0;
- unsigned length = mReq->req.length;
-
- /* don't queue twice */
- if (mReq->req.status == -EALREADY)
- return -EALREADY;
-
- mReq->req.status = -EALREADY;
- if (length && mReq->req.dma == DMA_ADDR_INVALID) {
- mReq->req.dma = \
- dma_map_single(mEp->device, mReq->req.buf,
- length, mEp->dir ? DMA_TO_DEVICE :
- DMA_FROM_DEVICE);
- if (mReq->req.dma == 0)
- return -ENOMEM;
-
- mReq->map = 1;
- }
-
- if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
- mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
- &mReq->zdma);
- if (mReq->zptr == NULL) {
- if (mReq->map) {
- dma_unmap_single(mEp->device, mReq->req.dma,
- length, mEp->dir ? DMA_TO_DEVICE :
- DMA_FROM_DEVICE);
- mReq->req.dma = DMA_ADDR_INVALID;
- mReq->map = 0;
- }
- return -ENOMEM;
- }
- memset(mReq->zptr, 0, sizeof(*mReq->zptr));
- mReq->zptr->next = TD_TERMINATE;
- mReq->zptr->token = TD_STATUS_ACTIVE;
- if (!mReq->req.no_interrupt)
- mReq->zptr->token |= TD_IOC;
- }
- /*
- * TD configuration
- * TODO - handle requests which spawns into several TDs
- */
- memset(mReq->ptr, 0, sizeof(*mReq->ptr));
- mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES);
- mReq->ptr->token &= TD_TOTAL_BYTES;
- mReq->ptr->token |= TD_STATUS_ACTIVE;
- if (mReq->zptr) {
- mReq->ptr->next = mReq->zdma;
- } else {
- mReq->ptr->next = TD_TERMINATE;
- if (!mReq->req.no_interrupt)
- mReq->ptr->token |= TD_IOC;
- }
- mReq->ptr->page[0] = mReq->req.dma;
- for (i = 1; i < 5; i++)
- mReq->ptr->page[i] =
- (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
-
- if (!list_empty(&mEp->qh.queue)) {
- struct ci13xxx_req *mReqPrev;
- int n = hw_ep_bit(mEp->num, mEp->dir);
- int tmp_stat;
-
- mReqPrev = list_entry(mEp->qh.queue.prev,
- struct ci13xxx_req, queue);
- if (mReqPrev->zptr)
- mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
- else
- mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
- wmb();
- if (hw_read(udc, OP_ENDPTPRIME, BIT(n)))
- goto done;
- do {
- hw_write(udc, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
- tmp_stat = hw_read(udc, OP_ENDPTSTAT, BIT(n));
- } while (!hw_read(udc, OP_USBCMD, USBCMD_ATDTW));
- hw_write(udc, OP_USBCMD, USBCMD_ATDTW, 0);
- if (tmp_stat)
- goto done;
- }
-
- /* QH configuration */
- mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
- mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
- mEp->qh.ptr->cap |= QH_ZLT;
-
- wmb(); /* synchronize before ep prime */
-
- ret = hw_ep_prime(udc, mEp->num, mEp->dir,
- mEp->type == USB_ENDPOINT_XFER_CONTROL);
-done:
- return ret;
-}
-
-/**
- * _hardware_dequeue: handles a request at hardware level
- * @gadget: gadget
- * @mEp: endpoint
- *
- * This function returns an error code
- */
-static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
-{
- if (mReq->req.status != -EALREADY)
- return -EINVAL;
-
- if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
- return -EBUSY;
-
- if (mReq->zptr) {
- if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
- return -EBUSY;
- dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
- mReq->zptr = NULL;
- }
-
- mReq->req.status = 0;
-
- if (mReq->map) {
- dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
- mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- mReq->req.dma = DMA_ADDR_INVALID;
- mReq->map = 0;
- }
-
- mReq->req.status = mReq->ptr->token & TD_STATUS;
- if ((TD_STATUS_HALTED & mReq->req.status) != 0)
- mReq->req.status = -1;
- else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
- mReq->req.status = -1;
- else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
- mReq->req.status = -1;
-
- mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
- mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
- mReq->req.actual = mReq->req.length - mReq->req.actual;
- mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
-
- return mReq->req.actual;
-}
-
-/**
- * _ep_nuke: dequeues all endpoint requests
- * @mEp: endpoint
- *
- * This function returns an error code
- * Caller must hold lock
- */
-static int _ep_nuke(struct ci13xxx_ep *mEp)
-__releases(mEp->lock)
-__acquires(mEp->lock)
-{
- if (mEp == NULL)
- return -EINVAL;
-
- hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
-
- while (!list_empty(&mEp->qh.queue)) {
-
- /* pop oldest request */
- struct ci13xxx_req *mReq = \
- list_entry(mEp->qh.queue.next,
- struct ci13xxx_req, queue);
- list_del_init(&mReq->queue);
- mReq->req.status = -ESHUTDOWN;
-
- if (mReq->req.complete != NULL) {
- spin_unlock(mEp->lock);
- mReq->req.complete(&mEp->ep, &mReq->req);
- spin_lock(mEp->lock);
- }
- }
- return 0;
-}
-
-/**
- * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
- * @gadget: gadget
- *
- * This function returns an error code
- */
-static int _gadget_stop_activity(struct usb_gadget *gadget)
-{
- struct usb_ep *ep;
- struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
- unsigned long flags;
-
- if (gadget == NULL)
- return -EINVAL;
-
- spin_lock_irqsave(&udc->lock, flags);
- udc->gadget.speed = USB_SPEED_UNKNOWN;
- udc->remote_wakeup = 0;
- udc->suspended = 0;
- spin_unlock_irqrestore(&udc->lock, flags);
-
- /* flush all endpoints */
- gadget_for_each_ep(ep, gadget) {
- usb_ep_fifo_flush(ep);
- }
- usb_ep_fifo_flush(&udc->ep0out->ep);
- usb_ep_fifo_flush(&udc->ep0in->ep);
-
- if (udc->driver)
- udc->driver->disconnect(gadget);
-
- /* make sure to disable all endpoints */
- gadget_for_each_ep(ep, gadget) {
- usb_ep_disable(ep);
- }
-
- if (udc->status != NULL) {
- usb_ep_free_request(&udc->ep0in->ep, udc->status);
- udc->status = NULL;
- }
-
- return 0;
-}
-
-/******************************************************************************
- * ISR block
- *****************************************************************************/
-/**
- * isr_reset_handler: USB reset interrupt handler
- * @udc: UDC device
- *
- * This function resets USB engine after a bus reset occurred
- */
-static void isr_reset_handler(struct ci13xxx *udc)
-__releases(udc->lock)
-__acquires(udc->lock)
-{
- int retval;
-
- dbg_event(0xFF, "BUS RST", 0);
-
- spin_unlock(&udc->lock);
- retval = _gadget_stop_activity(&udc->gadget);
- if (retval)
- goto done;
-
- retval = hw_usb_reset(udc);
- if (retval)
- goto done;
-
- udc->status = usb_ep_alloc_request(&udc->ep0in->ep, GFP_ATOMIC);
- if (udc->status == NULL)
- retval = -ENOMEM;
-
- spin_lock(&udc->lock);
-
- done:
- if (retval)
- dev_err(udc->dev, "error: %i\n", retval);
-}
-
-/**
- * isr_get_status_complete: get_status request complete function
- * @ep: endpoint
- * @req: request handled
- *
- * Caller must release lock
- */
-static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
-{
- if (ep == NULL || req == NULL)
- return;
-
- kfree(req->buf);
- usb_ep_free_request(ep, req);
-}
-
-/**
- * isr_get_status_response: get_status request response
- * @udc: udc struct
- * @setup: setup request packet
- *
- * This function returns an error code
- */
-static int isr_get_status_response(struct ci13xxx *udc,
- struct usb_ctrlrequest *setup)
-__releases(mEp->lock)
-__acquires(mEp->lock)
-{
- struct ci13xxx_ep *mEp = udc->ep0in;
- struct usb_request *req = NULL;
- gfp_t gfp_flags = GFP_ATOMIC;
- int dir, num, retval;
-
- if (mEp == NULL || setup == NULL)
- return -EINVAL;
-
- spin_unlock(mEp->lock);
- req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
- spin_lock(mEp->lock);
- if (req == NULL)
- return -ENOMEM;
-
- req->complete = isr_get_status_complete;
- req->length = 2;
- req->buf = kzalloc(req->length, gfp_flags);
- if (req->buf == NULL) {
- retval = -ENOMEM;
- goto err_free_req;
- }
-
- if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
- /* Assume that device is bus powered for now. */
- *(u16 *)req->buf = udc->remote_wakeup << 1;
- retval = 0;
- } else if ((setup->bRequestType & USB_RECIP_MASK) \
- == USB_RECIP_ENDPOINT) {
- dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
- TX : RX;
- num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
- *(u16 *)req->buf = hw_ep_get_halt(udc, num, dir);
- }
- /* else do nothing; reserved for future use */
-
- spin_unlock(mEp->lock);
- retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
- spin_lock(mEp->lock);
- if (retval)
- goto err_free_buf;
-
- return 0;
-
- err_free_buf:
- kfree(req->buf);
- err_free_req:
- spin_unlock(mEp->lock);
- usb_ep_free_request(&mEp->ep, req);
- spin_lock(mEp->lock);
- return retval;
-}
-
-/**
- * isr_setup_status_complete: setup_status request complete function
- * @ep: endpoint
- * @req: request handled
- *
- * Caller must release lock. Put the port in test mode if test mode
- * feature is selected.
- */
-static void
-isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
-{
- struct ci13xxx *udc = req->context;
- unsigned long flags;
-
- if (udc->setaddr) {
- hw_usb_set_address(udc, udc->address);
- udc->setaddr = false;
- }
-
- spin_lock_irqsave(&udc->lock, flags);
- if (udc->test_mode)
- hw_port_test_set(udc, udc->test_mode);
- spin_unlock_irqrestore(&udc->lock, flags);
-}
-
-/**
- * isr_setup_status_phase: queues the status phase of a setup transation
- * @udc: udc struct
- *
- * This function returns an error code
- */
-static int isr_setup_status_phase(struct ci13xxx *udc)
-__releases(mEp->lock)
-__acquires(mEp->lock)
-{
- int retval;
- struct ci13xxx_ep *mEp;
-
- mEp = (udc->ep0_dir == TX) ? udc->ep0out : udc->ep0in;
- udc->status->context = udc;
- udc->status->complete = isr_setup_status_complete;
-
- spin_unlock(mEp->lock);
- retval = usb_ep_queue(&mEp->ep, udc->status, GFP_ATOMIC);
- spin_lock(mEp->lock);
-
- return retval;
-}
-
-/**
- * isr_tr_complete_low: transaction complete low level handler
- * @mEp: endpoint
- *
- * This function returns an error code
- * Caller must hold lock
- */
-static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
-__releases(mEp->lock)
-__acquires(mEp->lock)
-{
- struct ci13xxx_req *mReq, *mReqTemp;
- struct ci13xxx_ep *mEpTemp = mEp;
- int uninitialized_var(retval);
-
- if (list_empty(&mEp->qh.queue))
- return -EINVAL;
-
- list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
- queue) {
- retval = _hardware_dequeue(mEp, mReq);
- if (retval < 0)
- break;
- list_del_init(&mReq->queue);
- dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
- if (mReq->req.complete != NULL) {
- spin_unlock(mEp->lock);
- if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
- mReq->req.length)
- mEpTemp = mEp->udc->ep0in;
- mReq->req.complete(&mEpTemp->ep, &mReq->req);
- spin_lock(mEp->lock);
- }
- }
-
- if (retval == -EBUSY)
- retval = 0;
- if (retval < 0)
- dbg_event(_usb_addr(mEp), "DONE", retval);
-
- return retval;
-}
-
-/**
- * isr_tr_complete_handler: transaction complete interrupt handler
- * @udc: UDC descriptor
- *
- * This function handles traffic events
- */
-static void isr_tr_complete_handler(struct ci13xxx *udc)
-__releases(udc->lock)
-__acquires(udc->lock)
-{
- unsigned i;
- u8 tmode = 0;
-
- for (i = 0; i < udc->hw_ep_max; i++) {
- struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
- int type, num, dir, err = -EINVAL;
- struct usb_ctrlrequest req;
-
- if (mEp->ep.desc == NULL)
- continue; /* not configured */
-
- if (hw_test_and_clear_complete(udc, i)) {
- err = isr_tr_complete_low(mEp);
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
- if (err > 0) /* needs status phase */
- err = isr_setup_status_phase(udc);
- if (err < 0) {
- dbg_event(_usb_addr(mEp),
- "ERROR", err);
- spin_unlock(&udc->lock);
- if (usb_ep_set_halt(&mEp->ep))
- dev_err(udc->dev,
- "error: ep_set_halt\n");
- spin_lock(&udc->lock);
- }
- }
- }
-
- if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
- !hw_test_and_clear_setup_status(udc, i))
- continue;
-
- if (i != 0) {
- dev_warn(udc->dev, "ctrl traffic at endpoint %d\n", i);
- continue;
- }
-
- /*
- * Flush data and handshake transactions of previous
- * setup packet.
- */
- _ep_nuke(udc->ep0out);
- _ep_nuke(udc->ep0in);
-
- /* read_setup_packet */
- do {
- hw_test_and_set_setup_guard(udc);
- memcpy(&req, &mEp->qh.ptr->setup, sizeof(req));
- } while (!hw_test_and_clear_setup_guard(udc));
-
- type = req.bRequestType;
-
- udc->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
-
- dbg_setup(_usb_addr(mEp), &req);
-
- switch (req.bRequest) {
- case USB_REQ_CLEAR_FEATURE:
- if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
- le16_to_cpu(req.wValue) ==
- USB_ENDPOINT_HALT) {
- if (req.wLength != 0)
- break;
- num = le16_to_cpu(req.wIndex);
- dir = num & USB_ENDPOINT_DIR_MASK;
- num &= USB_ENDPOINT_NUMBER_MASK;
- if (dir) /* TX */
- num += udc->hw_ep_max/2;
- if (!udc->ci13xxx_ep[num].wedge) {
- spin_unlock(&udc->lock);
- err = usb_ep_clear_halt(
- &udc->ci13xxx_ep[num].ep);
- spin_lock(&udc->lock);
- if (err)
- break;
- }
- err = isr_setup_status_phase(udc);
- } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
- le16_to_cpu(req.wValue) ==
- USB_DEVICE_REMOTE_WAKEUP) {
- if (req.wLength != 0)
- break;
- udc->remote_wakeup = 0;
- err = isr_setup_status_phase(udc);
- } else {
- goto delegate;
- }
- break;
- case USB_REQ_GET_STATUS:
- if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
- type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
- type != (USB_DIR_IN|USB_RECIP_INTERFACE))
- goto delegate;
- if (le16_to_cpu(req.wLength) != 2 ||
- le16_to_cpu(req.wValue) != 0)
- break;
- err = isr_get_status_response(udc, &req);
- break;
- case USB_REQ_SET_ADDRESS:
- if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
- goto delegate;
- if (le16_to_cpu(req.wLength) != 0 ||
- le16_to_cpu(req.wIndex) != 0)
- break;
- udc->address = (u8)le16_to_cpu(req.wValue);
- udc->setaddr = true;
- err = isr_setup_status_phase(udc);
- break;
- case USB_REQ_SET_FEATURE:
- if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
- le16_to_cpu(req.wValue) ==
- USB_ENDPOINT_HALT) {
- if (req.wLength != 0)
- break;
- num = le16_to_cpu(req.wIndex);
- dir = num & USB_ENDPOINT_DIR_MASK;
- num &= USB_ENDPOINT_NUMBER_MASK;
- if (dir) /* TX */
- num += udc->hw_ep_max/2;
-
- spin_unlock(&udc->lock);
- err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
- spin_lock(&udc->lock);
- if (!err)
- isr_setup_status_phase(udc);
- } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
- if (req.wLength != 0)
- break;
- switch (le16_to_cpu(req.wValue)) {
- case USB_DEVICE_REMOTE_WAKEUP:
- udc->remote_wakeup = 1;
- err = isr_setup_status_phase(udc);
- break;
- case USB_DEVICE_TEST_MODE:
- tmode = le16_to_cpu(req.wIndex) >> 8;
- switch (tmode) {
- case TEST_J:
- case TEST_K:
- case TEST_SE0_NAK:
- case TEST_PACKET:
- case TEST_FORCE_EN:
- udc->test_mode = tmode;
- err = isr_setup_status_phase(
- udc);
- break;
- default:
- break;
- }
- default:
- goto delegate;
- }
- } else {
- goto delegate;
- }
- break;
- default:
-delegate:
- if (req.wLength == 0) /* no data phase */
- udc->ep0_dir = TX;
-
- spin_unlock(&udc->lock);
- err = udc->driver->setup(&udc->gadget, &req);
- spin_lock(&udc->lock);
- break;
- }
-
- if (err < 0) {
- dbg_event(_usb_addr(mEp), "ERROR", err);
-
- spin_unlock(&udc->lock);
- if (usb_ep_set_halt(&mEp->ep))
- dev_err(udc->dev, "error: ep_set_halt\n");
- spin_lock(&udc->lock);
- }
- }
-}
-
-/******************************************************************************
- * ENDPT block
- *****************************************************************************/
-/**
- * ep_enable: configure endpoint, making it usable
- *
- * Check usb_ep_enable() at "usb_gadget.h" for details
- */
-static int ep_enable(struct usb_ep *ep,
- const struct usb_endpoint_descriptor *desc)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- int retval = 0;
- unsigned long flags;
-
- if (ep == NULL || desc == NULL)
- return -EINVAL;
-
- spin_lock_irqsave(mEp->lock, flags);
-
- /* only internal SW should enable ctrl endpts */
-
- mEp->ep.desc = desc;
-
- if (!list_empty(&mEp->qh.queue))
- dev_warn(mEp->udc->dev, "enabling a non-empty endpoint!\n");
-
- mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
- mEp->num = usb_endpoint_num(desc);
- mEp->type = usb_endpoint_type(desc);
-
- mEp->ep.maxpacket = usb_endpoint_maxp(desc);
-
- dbg_event(_usb_addr(mEp), "ENABLE", 0);
-
- mEp->qh.ptr->cap = 0;
-
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
- mEp->qh.ptr->cap |= QH_IOS;
- else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
- mEp->qh.ptr->cap &= ~QH_MULT;
- else
- mEp->qh.ptr->cap &= ~QH_ZLT;
-
- mEp->qh.ptr->cap |=
- (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
- mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */
-
- /*
- * Enable endpoints in the HW other than ep0 as ep0
- * is always enabled
- */
- if (mEp->num)
- retval |= hw_ep_enable(mEp->udc, mEp->num, mEp->dir, mEp->type);
-
- spin_unlock_irqrestore(mEp->lock, flags);
- return retval;
-}
-
-/**
- * ep_disable: endpoint is no longer usable
- *
- * Check usb_ep_disable() at "usb_gadget.h" for details
- */
-static int ep_disable(struct usb_ep *ep)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- int direction, retval = 0;
- unsigned long flags;
-
- if (ep == NULL)
- return -EINVAL;
- else if (mEp->ep.desc == NULL)
- return -EBUSY;
-
- spin_lock_irqsave(mEp->lock, flags);
-
- /* only internal SW should disable ctrl endpts */
-
- direction = mEp->dir;
- do {
- dbg_event(_usb_addr(mEp), "DISABLE", 0);
-
- retval |= _ep_nuke(mEp);
- retval |= hw_ep_disable(mEp->udc, mEp->num, mEp->dir);
-
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
- mEp->dir = (mEp->dir == TX) ? RX : TX;
-
- } while (mEp->dir != direction);
-
- mEp->ep.desc = NULL;
-
- spin_unlock_irqrestore(mEp->lock, flags);
- return retval;
-}
-
-/**
- * ep_alloc_request: allocate a request object to use with this endpoint
- *
- * Check usb_ep_alloc_request() at "usb_gadget.h" for details
- */
-static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- struct ci13xxx_req *mReq = NULL;
-
- if (ep == NULL)
- return NULL;
-
- mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
- if (mReq != NULL) {
- INIT_LIST_HEAD(&mReq->queue);
- mReq->req.dma = DMA_ADDR_INVALID;
-
- mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
- &mReq->dma);
- if (mReq->ptr == NULL) {
- kfree(mReq);
- mReq = NULL;
- }
- }
-
- dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
-
- return (mReq == NULL) ? NULL : &mReq->req;
-}
-
-/**
- * ep_free_request: frees a request object
- *
- * Check usb_ep_free_request() at "usb_gadget.h" for details
- */
-static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
- unsigned long flags;
-
- if (ep == NULL || req == NULL) {
- return;
- } else if (!list_empty(&mReq->queue)) {
- dev_err(mEp->udc->dev, "freeing queued request\n");
- return;
- }
-
- spin_lock_irqsave(mEp->lock, flags);
-
- if (mReq->ptr)
- dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
- kfree(mReq);
-
- dbg_event(_usb_addr(mEp), "FREE", 0);
-
- spin_unlock_irqrestore(mEp->lock, flags);
-}
-
-/**
- * ep_queue: queues (submits) an I/O request to an endpoint
- *
- * Check usb_ep_queue()* at usb_gadget.h" for details
- */
-static int ep_queue(struct usb_ep *ep, struct usb_request *req,
- gfp_t __maybe_unused gfp_flags)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
- struct ci13xxx *udc = mEp->udc;
- int retval = 0;
- unsigned long flags;
-
- if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
- return -EINVAL;
-
- spin_lock_irqsave(mEp->lock, flags);
-
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
- if (req->length)
- mEp = (udc->ep0_dir == RX) ?
- udc->ep0out : udc->ep0in;
- if (!list_empty(&mEp->qh.queue)) {
- _ep_nuke(mEp);
- retval = -EOVERFLOW;
- dev_warn(mEp->udc->dev, "endpoint ctrl %X nuked\n",
- _usb_addr(mEp));
- }
- }
-
- /* first nuke then test link, e.g. previous status has not sent */
- if (!list_empty(&mReq->queue)) {
- retval = -EBUSY;
- dev_err(mEp->udc->dev, "request already in queue\n");
- goto done;
- }
-
- if (req->length > 4 * CI13XXX_PAGE_SIZE) {
- req->length = 4 * CI13XXX_PAGE_SIZE;
- retval = -EMSGSIZE;
- dev_warn(mEp->udc->dev, "request length truncated\n");
- }
-
- dbg_queue(_usb_addr(mEp), req, retval);
-
- /* push request */
- mReq->req.status = -EINPROGRESS;
- mReq->req.actual = 0;
-
- retval = _hardware_enqueue(mEp, mReq);
-
- if (retval == -EALREADY) {
- dbg_event(_usb_addr(mEp), "QUEUE", retval);
- retval = 0;
- }
- if (!retval)
- list_add_tail(&mReq->queue, &mEp->qh.queue);
-
- done:
- spin_unlock_irqrestore(mEp->lock, flags);
- return retval;
-}
-
-/**
- * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
- *
- * Check usb_ep_dequeue() at "usb_gadget.h" for details
- */
-static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
- unsigned long flags;
-
- if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
- mEp->ep.desc == NULL || list_empty(&mReq->queue) ||
- list_empty(&mEp->qh.queue))
- return -EINVAL;
-
- spin_lock_irqsave(mEp->lock, flags);
-
- dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
-
- hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
-
- /* pop request */
- list_del_init(&mReq->queue);
- if (mReq->map) {
- dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
- mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
- mReq->req.dma = DMA_ADDR_INVALID;
- mReq->map = 0;
- }
- req->status = -ECONNRESET;
-
- if (mReq->req.complete != NULL) {
- spin_unlock(mEp->lock);
- mReq->req.complete(&mEp->ep, &mReq->req);
- spin_lock(mEp->lock);
- }
-
- spin_unlock_irqrestore(mEp->lock, flags);
- return 0;
-}
-
-/**
- * ep_set_halt: sets the endpoint halt feature
- *
- * Check usb_ep_set_halt() at "usb_gadget.h" for details
- */
-static int ep_set_halt(struct usb_ep *ep, int value)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- int direction, retval = 0;
- unsigned long flags;
-
- if (ep == NULL || mEp->ep.desc == NULL)
- return -EINVAL;
-
- spin_lock_irqsave(mEp->lock, flags);
-
-#ifndef STALL_IN
- /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
- if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
- !list_empty(&mEp->qh.queue)) {
- spin_unlock_irqrestore(mEp->lock, flags);
- return -EAGAIN;
- }
-#endif
-
- direction = mEp->dir;
- do {
- dbg_event(_usb_addr(mEp), "HALT", value);
- retval |= hw_ep_set_halt(mEp->udc, mEp->num, mEp->dir, value);
-
- if (!value)
- mEp->wedge = 0;
-
- if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
- mEp->dir = (mEp->dir == TX) ? RX : TX;
-
- } while (mEp->dir != direction);
-
- spin_unlock_irqrestore(mEp->lock, flags);
- return retval;
-}
-
-/**
- * ep_set_wedge: sets the halt feature and ignores clear requests
- *
- * Check usb_ep_set_wedge() at "usb_gadget.h" for details
- */
-static int ep_set_wedge(struct usb_ep *ep)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- unsigned long flags;
-
- if (ep == NULL || mEp->ep.desc == NULL)
- return -EINVAL;
-
- spin_lock_irqsave(mEp->lock, flags);
-
- dbg_event(_usb_addr(mEp), "WEDGE", 0);
- mEp->wedge = 1;
-
- spin_unlock_irqrestore(mEp->lock, flags);
-
- return usb_ep_set_halt(ep);
-}
-
-/**
- * ep_fifo_flush: flushes contents of a fifo
- *
- * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
- */
-static void ep_fifo_flush(struct usb_ep *ep)
-{
- struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
- unsigned long flags;
-
- if (ep == NULL) {
- dev_err(mEp->udc->dev, "%02X: -EINVAL\n", _usb_addr(mEp));
- return;
- }
-
- spin_lock_irqsave(mEp->lock, flags);
-
- dbg_event(_usb_addr(mEp), "FFLUSH", 0);
- hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
-
- spin_unlock_irqrestore(mEp->lock, flags);
-}
-
-/**
- * Endpoint-specific part of the API to the USB controller hardware
- * Check "usb_gadget.h" for details
- */
-static const struct usb_ep_ops usb_ep_ops = {
- .enable = ep_enable,
- .disable = ep_disable,
- .alloc_request = ep_alloc_request,
- .free_request = ep_free_request,
- .queue = ep_queue,
- .dequeue = ep_dequeue,
- .set_halt = ep_set_halt,
- .set_wedge = ep_set_wedge,
- .fifo_flush = ep_fifo_flush,
-};
-
-/******************************************************************************
- * GADGET block
- *****************************************************************************/
-static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
-{
- struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
- unsigned long flags;
- int gadget_ready = 0;
-
- if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS))
- return -EOPNOTSUPP;
-
- spin_lock_irqsave(&udc->lock, flags);
- udc->vbus_active = is_active;
- if (udc->driver)
- gadget_ready = 1;
- spin_unlock_irqrestore(&udc->lock, flags);
-
- if (gadget_ready) {
- if (is_active) {
- pm_runtime_get_sync(&_gadget->dev);
- hw_device_reset(udc);
- hw_device_state(udc, udc->ep0out->qh.dma);
- } else {
- hw_device_state(udc, 0);
- if (udc->udc_driver->notify_event)
- udc->udc_driver->notify_event(udc,
- CI13XXX_CONTROLLER_STOPPED_EVENT);
- _gadget_stop_activity(&udc->gadget);
- pm_runtime_put_sync(&_gadget->dev);
- }
- }
-
- return 0;
-}
-
-static int ci13xxx_wakeup(struct usb_gadget *_gadget)
-{
- struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
- unsigned long flags;
- int ret = 0;
-
- spin_lock_irqsave(&udc->lock, flags);
- if (!udc->remote_wakeup) {
- ret = -EOPNOTSUPP;
- goto out;
- }
- if (!hw_read(udc, OP_PORTSC, PORTSC_SUSP)) {
- ret = -EINVAL;
- goto out;
- }
- hw_write(udc, OP_PORTSC, PORTSC_FPR, PORTSC_FPR);
-out:
- spin_unlock_irqrestore(&udc->lock, flags);
- return ret;
-}
-
-static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
-{
- struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
-
- if (udc->transceiver)
- return usb_phy_set_power(udc->transceiver, mA);
- return -ENOTSUPP;
-}
-
-static int ci13xxx_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver);
-static int ci13xxx_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver);
-/**
- * Device operations part of the API to the USB controller hardware,
- * which don't involve endpoints (or i/o)
- * Check "usb_gadget.h" for details
- */
-static const struct usb_gadget_ops usb_gadget_ops = {
- .vbus_session = ci13xxx_vbus_session,
- .wakeup = ci13xxx_wakeup,
- .vbus_draw = ci13xxx_vbus_draw,
- .udc_start = ci13xxx_start,
- .udc_stop = ci13xxx_stop,
-};
-
-static int init_eps(struct ci13xxx *udc)
-{
- int retval = 0, i, j;
-
- for (i = 0; i < udc->hw_ep_max/2; i++)
- for (j = RX; j <= TX; j++) {
- int k = i + j * udc->hw_ep_max/2;
- struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[k];
-
- scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i,
- (j == TX) ? "in" : "out");
-
- mEp->udc = udc;
- mEp->lock = &udc->lock;
- mEp->device = &udc->gadget.dev;
- mEp->td_pool = udc->td_pool;
-
- mEp->ep.name = mEp->name;
- mEp->ep.ops = &usb_ep_ops;
- mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
-
- INIT_LIST_HEAD(&mEp->qh.queue);
- mEp->qh.ptr = dma_pool_alloc(udc->qh_pool, GFP_KERNEL,
- &mEp->qh.dma);
- if (mEp->qh.ptr == NULL)
- retval = -ENOMEM;
- else
- memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr));
-
- /*
- * set up shorthands for ep0 out and in endpoints,
- * don't add to gadget's ep_list
- */
- if (i == 0) {
- if (j == RX)
- udc->ep0out = mEp;
- else
- udc->ep0in = mEp;
-
- continue;
- }
-
- list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
- }
-
- return retval;
-}
-
-/**
- * ci13xxx_start: register a gadget driver
- * @gadget: our gadget
- * @driver: the driver being registered
- *
- * Interrupts are enabled here.
- */
-static int ci13xxx_start(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
- unsigned long flags;
- int retval = -ENOMEM;
-
- if (driver->disconnect == NULL)
- return -EINVAL;
-
-
- udc->ep0out->ep.desc = &ctrl_endpt_out_desc;
- retval = usb_ep_enable(&udc->ep0out->ep);
- if (retval)
- return retval;
-
- udc->ep0in->ep.desc = &ctrl_endpt_in_desc;
- retval = usb_ep_enable(&udc->ep0in->ep);
- if (retval)
- return retval;
- spin_lock_irqsave(&udc->lock, flags);
-
- udc->driver = driver;
- pm_runtime_get_sync(&udc->gadget.dev);
- if (udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) {
- if (udc->vbus_active) {
- if (udc->udc_driver->flags & CI13XXX_REGS_SHARED)
- hw_device_reset(udc);
- } else {
- pm_runtime_put_sync(&udc->gadget.dev);
- goto done;
- }
- }
-
- retval = hw_device_state(udc, udc->ep0out->qh.dma);
- if (retval)
- pm_runtime_put_sync(&udc->gadget.dev);
-
- done:
- spin_unlock_irqrestore(&udc->lock, flags);
- return retval;
-}
-
-/**
- * ci13xxx_stop: unregister a gadget driver
- */
-static int ci13xxx_stop(struct usb_gadget *gadget,
- struct usb_gadget_driver *driver)
-{
- struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
- unsigned long flags;
-
- spin_lock_irqsave(&udc->lock, flags);
-
- if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) ||
- udc->vbus_active) {
- hw_device_state(udc, 0);
- if (udc->udc_driver->notify_event)
- udc->udc_driver->notify_event(udc,
- CI13XXX_CONTROLLER_STOPPED_EVENT);
- udc->driver = NULL;
- spin_unlock_irqrestore(&udc->lock, flags);
- _gadget_stop_activity(&udc->gadget);
- spin_lock_irqsave(&udc->lock, flags);
- pm_runtime_put(&udc->gadget.dev);
- }
-
- spin_unlock_irqrestore(&udc->lock, flags);
-
- return 0;
-}
-
-/******************************************************************************
- * BUS block
- *****************************************************************************/
-/**
- * udc_irq: global interrupt handler
- *
- * This function returns IRQ_HANDLED if the IRQ has been handled
- * It locks access to registers
- */
-static irqreturn_t udc_irq(int irq, void *data)
-{
- struct ci13xxx *udc = data;
- irqreturn_t retval;
- u32 intr;
-
- if (udc == NULL)
- return IRQ_HANDLED;
-
- spin_lock(&udc->lock);
-
- if (udc->udc_driver->flags & CI13XXX_REGS_SHARED) {
- if (hw_read(udc, OP_USBMODE, USBMODE_CM) !=
- USBMODE_CM_DEVICE) {
- spin_unlock(&udc->lock);
- return IRQ_NONE;
- }
- }
- intr = hw_test_and_clear_intr_active(udc);
- if (intr) {
- isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intr;
- isr_statistics.hndl.idx &= ISR_MASK;
- isr_statistics.hndl.cnt++;
-
- /* order defines priority - do NOT change it */
- if (USBi_URI & intr) {
- isr_statistics.uri++;
- isr_reset_handler(udc);
- }
- if (USBi_PCI & intr) {
- isr_statistics.pci++;
- udc->gadget.speed = hw_port_is_high_speed(udc) ?
- USB_SPEED_HIGH : USB_SPEED_FULL;
- if (udc->suspended && udc->driver->resume) {
- spin_unlock(&udc->lock);
- udc->driver->resume(&udc->gadget);
- spin_lock(&udc->lock);
- udc->suspended = 0;
- }
- }
- if (USBi_UEI & intr)
- isr_statistics.uei++;
- if (USBi_UI & intr) {
- isr_statistics.ui++;
- isr_tr_complete_handler(udc);
- }
- if (USBi_SLI & intr) {
- if (udc->gadget.speed != USB_SPEED_UNKNOWN &&
- udc->driver->suspend) {
- udc->suspended = 1;
- spin_unlock(&udc->lock);
- udc->driver->suspend(&udc->gadget);
- spin_lock(&udc->lock);
- }
- isr_statistics.sli++;
- }
- retval = IRQ_HANDLED;
- } else {
- isr_statistics.none++;
- retval = IRQ_NONE;
- }
- spin_unlock(&udc->lock);
-
- return retval;
-}
-
-/**
- * udc_release: driver release function
- * @dev: device
- *
- * Currently does nothing
- */
-static void udc_release(struct device *dev)
-{
-}
-
-/**
- * udc_probe: parent probe must call this to initialize UDC
- * @dev: parent device
- * @regs: registers base address
- * @name: driver name
- *
- * This function returns an error code
- * No interrupts active, the IRQ has not been requested yet
- * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
- */
-static int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
- void __iomem *regs, struct ci13xxx **_udc)
-{
- struct ci13xxx *udc;
- int retval = 0;
-
- if (dev == NULL || regs == NULL || driver == NULL ||
- driver->name == NULL)
- return -EINVAL;
-
- udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
- if (udc == NULL)
- return -ENOMEM;
-
- spin_lock_init(&udc->lock);
- udc->regs = regs;
- udc->udc_driver = driver;
-
- udc->gadget.ops = &usb_gadget_ops;
- udc->gadget.speed = USB_SPEED_UNKNOWN;
- udc->gadget.max_speed = USB_SPEED_HIGH;
- udc->gadget.is_otg = 0;
- udc->gadget.name = driver->name;
-
- INIT_LIST_HEAD(&udc->gadget.ep_list);
-
- dev_set_name(&udc->gadget.dev, "gadget");
- udc->gadget.dev.dma_mask = dev->dma_mask;
- udc->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask;
- udc->gadget.dev.parent = dev;
- udc->gadget.dev.release = udc_release;
-
- udc->dev = dev;
-
- /* alloc resources */
- udc->qh_pool = dma_pool_create("ci13xxx_qh", dev,
- sizeof(struct ci13xxx_qh),
- 64, CI13XXX_PAGE_SIZE);
- if (udc->qh_pool == NULL) {
- retval = -ENOMEM;
- goto free_udc;
- }
-
- udc->td_pool = dma_pool_create("ci13xxx_td", dev,
- sizeof(struct ci13xxx_td),
- 64, CI13XXX_PAGE_SIZE);
- if (udc->td_pool == NULL) {
- retval = -ENOMEM;
- goto free_qh_pool;
- }
-
- retval = hw_device_init(udc, regs, driver->capoffset);
- if (retval < 0)
- goto free_pools;
-
- retval = init_eps(udc);
- if (retval)
- goto free_pools;
-
- udc->gadget.ep0 = &udc->ep0in->ep;
-
- udc->transceiver = usb_get_transceiver();
-
- if (udc->udc_driver->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
- if (udc->transceiver == NULL) {
- retval = -ENODEV;
- goto free_pools;
- }
- }
-
- if (!(udc->udc_driver->flags & CI13XXX_REGS_SHARED)) {
- retval = hw_device_reset(udc);
- if (retval)
- goto put_transceiver;
- }
-
- retval = device_register(&udc->gadget.dev);
- if (retval) {
- put_device(&udc->gadget.dev);
- goto put_transceiver;
- }
-
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- retval = dbg_create_files(&udc->gadget.dev);
-#endif
- if (retval)
- goto unreg_device;
-
- if (udc->transceiver) {
- retval = otg_set_peripheral(udc->transceiver->otg,
- &udc->gadget);
- if (retval)
- goto remove_dbg;
- }
-
- retval = usb_add_gadget_udc(dev, &udc->gadget);
- if (retval)
- goto remove_trans;
-
- pm_runtime_no_callbacks(&udc->gadget.dev);
- pm_runtime_enable(&udc->gadget.dev);
-
- *_udc = udc;
- return retval;
-
-remove_trans:
- if (udc->transceiver) {
- otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
- usb_put_transceiver(udc->transceiver);
- }
-
- dev_err(dev, "error = %i\n", retval);
-remove_dbg:
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- dbg_remove_files(&udc->gadget.dev);
-#endif
-unreg_device:
- device_unregister(&udc->gadget.dev);
-put_transceiver:
- if (udc->transceiver)
- usb_put_transceiver(udc->transceiver);
-free_pools:
- dma_pool_destroy(udc->td_pool);
-free_qh_pool:
- dma_pool_destroy(udc->qh_pool);
-free_udc:
- kfree(udc);
- *_udc = NULL;
- return retval;
-}
-
-/**
- * udc_remove: parent remove must call this to remove UDC
- *
- * No interrupts active, the IRQ has been released
- */
-static void udc_remove(struct ci13xxx *udc)
-{
- int i;
-
- if (udc == NULL)
- return;
-
- usb_del_gadget_udc(&udc->gadget);
-
- for (i = 0; i < udc->hw_ep_max; i++) {
- struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
-
- dma_pool_free(udc->qh_pool, mEp->qh.ptr, mEp->qh.dma);
- }
-
- dma_pool_destroy(udc->td_pool);
- dma_pool_destroy(udc->qh_pool);
-
- if (udc->transceiver) {
- otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
- usb_put_transceiver(udc->transceiver);
- }
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
- dbg_remove_files(&udc->gadget.dev);
-#endif
- device_unregister(&udc->gadget.dev);
-
- kfree(udc->hw_bank.regmap);
- kfree(udc);
-}
-
-static int __devinit ci_udc_probe(struct platform_device *pdev)
-{
- struct device *dev = &pdev->dev;
- struct ci13xxx_udc_driver *driver = dev->platform_data;
- struct ci13xxx *udc;
- struct resource *res;
- void __iomem *base;
- int ret;
-
- if (!driver) {
- dev_err(dev, "platform data missing\n");
- return -ENODEV;
- }
-
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res) {
- dev_err(dev, "missing resource\n");
- return -ENODEV;
- }
-
- base = devm_request_and_ioremap(dev, res);
- if (!res) {
- dev_err(dev, "can't request and ioremap resource\n");
- return -ENOMEM;
- }
-
- ret = udc_probe(driver, dev, base, &udc);
- if (ret)
- return ret;
-
- udc->irq = platform_get_irq(pdev, 0);
- if (udc->irq < 0) {
- dev_err(dev, "missing IRQ\n");
- ret = -ENODEV;
- goto out;
- }
-
- platform_set_drvdata(pdev, udc);
- ret = request_irq(udc->irq, udc_irq, IRQF_SHARED, driver->name, udc);
-
-out:
- if (ret)
- udc_remove(udc);
-
- return ret;
-}
-
-static int __devexit ci_udc_remove(struct platform_device *pdev)
-{
- struct ci13xxx *udc = platform_get_drvdata(pdev);
-
- free_irq(udc->irq, udc);
- udc_remove(udc);
-
- return 0;
-}
-
-static struct platform_driver ci_udc_driver = {
- .probe = ci_udc_probe,
- .remove = __devexit_p(ci_udc_remove),
- .driver = {
- .name = "ci_udc",
- },
-};
-
-module_platform_driver(ci_udc_driver);
-
-MODULE_ALIAS("platform:ci_udc");
-MODULE_ALIAS("platform:ci13xxx");
-MODULE_LICENSE("GPL v2");
-MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
-MODULE_DESCRIPTION("ChipIdea UDC Driver");
+++ /dev/null
-/*
- * ci13xxx_udc.h - structures, registers, and macros MIPS USB IP core
- *
- * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
- *
- * Author: David Lopo
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Description: MIPS USB IP core family device controller
- * Structures, registers and logging macros
- */
-
-#ifndef _CI13XXX_h_
-#define _CI13XXX_h_
-
-/******************************************************************************
- * DEFINE
- *****************************************************************************/
-#define CI13XXX_PAGE_SIZE 4096ul /* page size for TD's */
-#define ENDPT_MAX 32
-#define CTRL_PAYLOAD_MAX 64
-#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */
-#define TX 1 /* similar to USB_DIR_IN but can be used as an index */
-
-/******************************************************************************
- * STRUCTURES
- *****************************************************************************/
-/* DMA layout of transfer descriptors */
-struct ci13xxx_td {
- /* 0 */
- u32 next;
-#define TD_TERMINATE BIT(0)
-#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
- /* 1 */
- u32 token;
-#define TD_STATUS (0x00FFUL << 0)
-#define TD_STATUS_TR_ERR BIT(3)
-#define TD_STATUS_DT_ERR BIT(5)
-#define TD_STATUS_HALTED BIT(6)
-#define TD_STATUS_ACTIVE BIT(7)
-#define TD_MULTO (0x0003UL << 10)
-#define TD_IOC BIT(15)
-#define TD_TOTAL_BYTES (0x7FFFUL << 16)
- /* 2 */
- u32 page[5];
-#define TD_CURR_OFFSET (0x0FFFUL << 0)
-#define TD_FRAME_NUM (0x07FFUL << 0)
-#define TD_RESERVED_MASK (0x0FFFUL << 0)
-} __attribute__ ((packed));
-
-/* DMA layout of queue heads */
-struct ci13xxx_qh {
- /* 0 */
- u32 cap;
-#define QH_IOS BIT(15)
-#define QH_MAX_PKT (0x07FFUL << 16)
-#define QH_ZLT BIT(29)
-#define QH_MULT (0x0003UL << 30)
- /* 1 */
- u32 curr;
- /* 2 - 8 */
- struct ci13xxx_td td;
- /* 9 */
- u32 RESERVED;
- struct usb_ctrlrequest setup;
-} __attribute__ ((packed));
-
-/* Extension of usb_request */
-struct ci13xxx_req {
- struct usb_request req;
- unsigned map;
- struct list_head queue;
- struct ci13xxx_td *ptr;
- dma_addr_t dma;
- struct ci13xxx_td *zptr;
- dma_addr_t zdma;
-};
-
-/* Extension of usb_ep */
-struct ci13xxx_ep {
- struct usb_ep ep;
- u8 dir;
- u8 num;
- u8 type;
- char name[16];
- struct {
- struct list_head queue;
- struct ci13xxx_qh *ptr;
- dma_addr_t dma;
- } qh;
- int wedge;
-
- /* global resources */
- struct ci13xxx *udc;
- spinlock_t *lock;
- struct device *device;
- struct dma_pool *td_pool;
-};
-
-struct ci13xxx;
-struct ci13xxx_udc_driver {
- const char *name;
- /* offset of the capability registers */
- uintptr_t capoffset;
- unsigned long flags;
-#define CI13XXX_REGS_SHARED BIT(0)
-#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
-#define CI13XXX_PULLUP_ON_VBUS BIT(2)
-#define CI13XXX_DISABLE_STREAMING BIT(3)
-
-#define CI13XXX_CONTROLLER_RESET_EVENT 0
-#define CI13XXX_CONTROLLER_STOPPED_EVENT 1
- void (*notify_event) (struct ci13xxx *udc, unsigned event);
-};
-
-struct hw_bank {
- unsigned lpm; /* is LPM? */
- void __iomem *abs; /* bus map offset */
- void __iomem *cap; /* bus map offset + CAP offset */
- void __iomem *op; /* bus map offset + OP offset */
- size_t size; /* bank size */
- void __iomem **regmap;
-};
-
-/* CI13XXX UDC descriptor & global resources */
-struct ci13xxx {
- spinlock_t lock; /* ctrl register bank access */
- void __iomem *regs; /* registers address space */
-
- struct dma_pool *qh_pool; /* DMA pool for queue heads */
- struct dma_pool *td_pool; /* DMA pool for transfer descs */
- struct usb_request *status; /* ep0 status request */
-
- struct device *dev;
- struct usb_gadget gadget; /* USB slave device */
- struct ci13xxx_ep ci13xxx_ep[ENDPT_MAX]; /* extended endpts */
- u32 ep0_dir; /* ep0 direction */
- struct ci13xxx_ep *ep0out, *ep0in;
- unsigned hw_ep_max; /* number of hw endpoints */
-
- bool setaddr;
- u8 address;
- u8 remote_wakeup; /* Is remote wakeup feature
- enabled by the host? */
- u8 suspended; /* suspended by the host */
- u8 test_mode; /* the selected test mode */
-
- struct hw_bank hw_bank;
- int irq;
- struct usb_gadget_driver *driver; /* 3rd party gadget driver */
- struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
- int vbus_active; /* is VBUS active */
- struct usb_phy *transceiver; /* Transceiver struct */
-};
-
-/******************************************************************************
- * REGISTERS
- *****************************************************************************/
-/* Default offset of capability registers */
-#define DEF_CAPOFFSET 0x100
-
-/* register size */
-#define REG_BITS (32)
-
-/* register indices */
-enum ci13xxx_regs {
- CAP_CAPLENGTH,
- CAP_HCCPARAMS,
- CAP_DCCPARAMS,
- CAP_TESTMODE,
- CAP_LAST = CAP_TESTMODE,
- OP_USBCMD,
- OP_USBSTS,
- OP_USBINTR,
- OP_DEVICEADDR,
- OP_ENDPTLISTADDR,
- OP_PORTSC,
- OP_DEVLC,
- OP_USBMODE,
- OP_ENDPTSETUPSTAT,
- OP_ENDPTPRIME,
- OP_ENDPTFLUSH,
- OP_ENDPTSTAT,
- OP_ENDPTCOMPLETE,
- OP_ENDPTCTRL,
- /* endptctrl1..15 follow */
- OP_LAST = OP_ENDPTCTRL + ENDPT_MAX / 2,
-};
-
-/* HCCPARAMS */
-#define HCCPARAMS_LEN BIT(17)
-
-/* DCCPARAMS */
-#define DCCPARAMS_DEN (0x1F << 0)
-#define DCCPARAMS_DC BIT(7)
-
-/* TESTMODE */
-#define TESTMODE_FORCE BIT(0)
-
-/* USBCMD */
-#define USBCMD_RS BIT(0)
-#define USBCMD_RST BIT(1)
-#define USBCMD_SUTW BIT(13)
-#define USBCMD_ATDTW BIT(14)
-
-/* USBSTS & USBINTR */
-#define USBi_UI BIT(0)
-#define USBi_UEI BIT(1)
-#define USBi_PCI BIT(2)
-#define USBi_URI BIT(6)
-#define USBi_SLI BIT(8)
-
-/* DEVICEADDR */
-#define DEVICEADDR_USBADRA BIT(24)
-#define DEVICEADDR_USBADR (0x7FUL << 25)
-
-/* PORTSC */
-#define PORTSC_FPR BIT(6)
-#define PORTSC_SUSP BIT(7)
-#define PORTSC_HSP BIT(9)
-#define PORTSC_PTC (0x0FUL << 16)
-
-/* DEVLC */
-#define DEVLC_PSPD (0x03UL << 25)
-#define DEVLC_PSPD_HS (0x02UL << 25)
-
-/* USBMODE */
-#define USBMODE_CM (0x03UL << 0)
-#define USBMODE_CM_IDLE (0x00UL << 0)
-#define USBMODE_CM_DEVICE (0x02UL << 0)
-#define USBMODE_CM_HOST (0x03UL << 0)
-#define USBMODE_SLOM BIT(3)
-#define USBMODE_SDIS BIT(4)
-
-/* ENDPTCTRL */
-#define ENDPTCTRL_RXS BIT(0)
-#define ENDPTCTRL_RXT (0x03UL << 2)
-#define ENDPTCTRL_RXR BIT(6) /* reserved for port 0 */
-#define ENDPTCTRL_RXE BIT(7)
-#define ENDPTCTRL_TXS BIT(16)
-#define ENDPTCTRL_TXT (0x03UL << 18)
-#define ENDPTCTRL_TXR BIT(22) /* reserved for port 0 */
-#define ENDPTCTRL_TXE BIT(23)
-
-#endif /* _CI13XXX_h_ */
--- /dev/null
+/*
+ * core.c - ChipIdea USB IP core family device controller
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/*
+ * Description: ChipIdea USB IP core family device controller
+ *
+ * This driver is composed of several blocks:
+ * - HW: hardware interface
+ * - DBG: debug facilities (optional)
+ * - UTIL: utilities
+ * - ISR: interrupts handling
+ * - ENDPT: endpoint operations (Gadget API)
+ * - GADGET: gadget operations (Gadget API)
+ * - BUS: bus glue code, bus abstraction layer
+ *
+ * Compile Options
+ * - CONFIG_USB_GADGET_DEBUG_FILES: enable debug facilities
+ * - STALL_IN: non-empty bulk-in pipes cannot be halted
+ * if defined mass storage compliance succeeds but with warnings
+ * => case 4: Hi > Dn
+ * => case 5: Hi > Di
+ * => case 8: Hi <> Do
+ * if undefined usbtest 13 fails
+ * - TRACE: enable function tracing (depends on DEBUG)
+ *
+ * Main Features
+ * - Chapter 9 & Mass Storage Compliance with Gadget File Storage
+ * - Chapter 9 Compliance with Gadget Zero (STALL_IN undefined)
+ * - Normal & LPM support
+ *
+ * USBTEST Report
+ * - OK: 0-12, 13 (STALL_IN defined) & 14
+ * - Not Supported: 15 & 16 (ISO)
+ *
+ * TODO List
+ * - OTG
+ * - Isochronous & Interrupt Traffic
+ * - Handle requests which spawns into several TDs
+ * - GET_STATUS(device) - always reports 0
+ * - Gadget API (majority of optional features)
+ * - Suspend & Remote Wakeup
+ */
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* MSM specific */
+#define ABS_AHBBURST (0x0090UL)
+#define ABS_AHBMODE (0x0098UL)
+/* UDC register map */
+static uintptr_t ci_regs_nolpm[] = {
+ [CAP_CAPLENGTH] = 0x000UL,
+ [CAP_HCCPARAMS] = 0x008UL,
+ [CAP_DCCPARAMS] = 0x024UL,
+ [CAP_TESTMODE] = 0x038UL,
+ [OP_USBCMD] = 0x000UL,
+ [OP_USBSTS] = 0x004UL,
+ [OP_USBINTR] = 0x008UL,
+ [OP_DEVICEADDR] = 0x014UL,
+ [OP_ENDPTLISTADDR] = 0x018UL,
+ [OP_PORTSC] = 0x044UL,
+ [OP_DEVLC] = 0x084UL,
+ [OP_USBMODE] = 0x068UL,
+ [OP_ENDPTSETUPSTAT] = 0x06CUL,
+ [OP_ENDPTPRIME] = 0x070UL,
+ [OP_ENDPTFLUSH] = 0x074UL,
+ [OP_ENDPTSTAT] = 0x078UL,
+ [OP_ENDPTCOMPLETE] = 0x07CUL,
+ [OP_ENDPTCTRL] = 0x080UL,
+};
+
+static uintptr_t ci_regs_lpm[] = {
+ [CAP_CAPLENGTH] = 0x000UL,
+ [CAP_HCCPARAMS] = 0x008UL,
+ [CAP_DCCPARAMS] = 0x024UL,
+ [CAP_TESTMODE] = 0x0FCUL,
+ [OP_USBCMD] = 0x000UL,
+ [OP_USBSTS] = 0x004UL,
+ [OP_USBINTR] = 0x008UL,
+ [OP_DEVICEADDR] = 0x014UL,
+ [OP_ENDPTLISTADDR] = 0x018UL,
+ [OP_PORTSC] = 0x044UL,
+ [OP_DEVLC] = 0x084UL,
+ [OP_USBMODE] = 0x0C8UL,
+ [OP_ENDPTSETUPSTAT] = 0x0D8UL,
+ [OP_ENDPTPRIME] = 0x0DCUL,
+ [OP_ENDPTFLUSH] = 0x0E0UL,
+ [OP_ENDPTSTAT] = 0x0E4UL,
+ [OP_ENDPTCOMPLETE] = 0x0E8UL,
+ [OP_ENDPTCTRL] = 0x0ECUL,
+};
+
+static int hw_alloc_regmap(struct ci13xxx *udc, bool is_lpm)
+{
+ int i;
+
+ kfree(udc->hw_bank.regmap);
+
+ udc->hw_bank.regmap = kzalloc((OP_LAST + 1) * sizeof(void *),
+ GFP_KERNEL);
+ if (!udc->hw_bank.regmap)
+ return -ENOMEM;
+
+ for (i = 0; i < OP_ENDPTCTRL; i++)
+ udc->hw_bank.regmap[i] =
+ (i <= CAP_LAST ? udc->hw_bank.cap : udc->hw_bank.op) +
+ (is_lpm ? ci_regs_lpm[i] : ci_regs_nolpm[i]);
+
+ for (; i <= OP_LAST; i++)
+ udc->hw_bank.regmap[i] = udc->hw_bank.op +
+ 4 * (i - OP_ENDPTCTRL) +
+ (is_lpm
+ ? ci_regs_lpm[OP_ENDPTCTRL]
+ : ci_regs_nolpm[OP_ENDPTCTRL]);
+
+ return 0;
+}
+
+/**
+ * hw_port_test_set: writes port test mode (execute without interruption)
+ * @mode: new value
+ *
+ * This function returns an error code
+ */
+int hw_port_test_set(struct ci13xxx *ci, u8 mode)
+{
+ const u8 TEST_MODE_MAX = 7;
+
+ if (mode > TEST_MODE_MAX)
+ return -EINVAL;
+
+ hw_write(ci, OP_PORTSC, PORTSC_PTC, mode << ffs_nr(PORTSC_PTC));
+ return 0;
+}
+
+/**
+ * hw_port_test_get: reads port test mode value
+ *
+ * This function returns port test mode value
+ */
+u8 hw_port_test_get(struct ci13xxx *ci)
+{
+ return hw_read(ci, OP_PORTSC, PORTSC_PTC) >> ffs_nr(PORTSC_PTC);
+}
+
+int hw_device_init(struct ci13xxx *udc, void __iomem *base,
+ uintptr_t cap_offset)
+{
+ u32 reg;
+
+ /* bank is a module variable */
+ udc->hw_bank.abs = base;
+
+ udc->hw_bank.cap = udc->hw_bank.abs;
+ udc->hw_bank.cap += cap_offset;
+ udc->hw_bank.op = udc->hw_bank.cap + ioread8(udc->hw_bank.cap);
+
+ hw_alloc_regmap(udc, false);
+ reg = hw_read(udc, CAP_HCCPARAMS, HCCPARAMS_LEN) >>
+ ffs_nr(HCCPARAMS_LEN);
+ udc->hw_bank.lpm = reg;
+ hw_alloc_regmap(udc, !!reg);
+ udc->hw_bank.size = udc->hw_bank.op - udc->hw_bank.abs;
+ udc->hw_bank.size += OP_LAST;
+ udc->hw_bank.size /= sizeof(u32);
+
+ reg = hw_read(udc, CAP_DCCPARAMS, DCCPARAMS_DEN) >>
+ ffs_nr(DCCPARAMS_DEN);
+ udc->hw_ep_max = reg * 2; /* cache hw ENDPT_MAX */
+
+ if (udc->hw_ep_max == 0 || udc->hw_ep_max > ENDPT_MAX)
+ return -ENODEV;
+
+ dev_dbg(udc->dev, "ChipIdea UDC found, lpm: %d; cap: %p op: %p\n",
+ udc->hw_bank.lpm, udc->hw_bank.cap, udc->hw_bank.op);
+
+ /* setup lock mode ? */
+
+ /* ENDPTSETUPSTAT is '0' by default */
+
+ /* HCSPARAMS.bf.ppc SHOULD BE zero for device */
+
+ return 0;
+}
+
+/**
+ * hw_device_reset: resets chip (execute without interruption)
+ * @ci: the controller
+ *
+ * This function returns an error code
+ */
+int hw_device_reset(struct ci13xxx *ci)
+{
+ /* should flush & stop before reset */
+ hw_write(ci, OP_ENDPTFLUSH, ~0, ~0);
+ hw_write(ci, OP_USBCMD, USBCMD_RS, 0);
+
+ hw_write(ci, OP_USBCMD, USBCMD_RST, USBCMD_RST);
+ while (hw_read(ci, OP_USBCMD, USBCMD_RST))
+ udelay(10); /* not RTOS friendly */
+
+
+ if (ci->udc_driver->notify_event)
+ ci->udc_driver->notify_event(ci,
+ CI13XXX_CONTROLLER_RESET_EVENT);
+
+ if (ci->udc_driver->flags & CI13XXX_DISABLE_STREAMING)
+ hw_write(ci, OP_USBMODE, USBMODE_SDIS, USBMODE_SDIS);
+
+ /* USBMODE should be configured step by step */
+ hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_IDLE);
+ hw_write(ci, OP_USBMODE, USBMODE_CM, USBMODE_CM_DEVICE);
+ /* HW >= 2.3 */
+ hw_write(ci, OP_USBMODE, USBMODE_SLOM, USBMODE_SLOM);
+
+ if (hw_read(ci, OP_USBMODE, USBMODE_CM) != USBMODE_CM_DEVICE) {
+ pr_err("cannot enter in device mode");
+ pr_err("lpm = %i", ci->hw_bank.lpm);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static int __devinit ci_udc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct ci13xxx_udc_driver *driver = dev->platform_data;
+ struct ci13xxx *udc;
+ struct resource *res;
+ void __iomem *base;
+ int ret;
+
+ if (!driver) {
+ dev_err(dev, "platform data missing\n");
+ return -ENODEV;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "missing resource\n");
+ return -ENODEV;
+ }
+
+ base = devm_request_and_ioremap(dev, res);
+ if (!res) {
+ dev_err(dev, "can't request and ioremap resource\n");
+ return -ENOMEM;
+ }
+
+ ret = udc_probe(driver, dev, base, &udc);
+ if (ret)
+ return ret;
+
+ udc->irq = platform_get_irq(pdev, 0);
+ if (udc->irq < 0) {
+ dev_err(dev, "missing IRQ\n");
+ ret = -ENODEV;
+ goto out;
+ }
+
+ platform_set_drvdata(pdev, udc);
+ ret = request_irq(udc->irq, udc_irq, IRQF_SHARED, driver->name, udc);
+
+out:
+ if (ret)
+ udc_remove(udc);
+
+ return ret;
+}
+
+static int __devexit ci_udc_remove(struct platform_device *pdev)
+{
+ struct ci13xxx *udc = platform_get_drvdata(pdev);
+
+ free_irq(udc->irq, udc);
+ udc_remove(udc);
+
+ return 0;
+}
+
+static struct platform_driver ci_udc_driver = {
+ .probe = ci_udc_probe,
+ .remove = __devexit_p(ci_udc_remove),
+ .driver = {
+ .name = "ci_udc",
+ },
+};
+
+module_platform_driver(ci_udc_driver);
+
+MODULE_ALIAS("platform:ci_udc");
+MODULE_ALIAS("platform:ci13xxx");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("David Lopo <dlopo@chipidea.mips.com>");
+MODULE_DESCRIPTION("ChipIdea UDC Driver");
--- /dev/null
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* Interrupt statistics */
+#define ISR_MASK 0x1F
+static struct isr_statistics {
+ u32 test;
+ u32 ui;
+ u32 uei;
+ u32 pci;
+ u32 uri;
+ u32 sli;
+ u32 none;
+ struct {
+ u32 cnt;
+ u32 buf[ISR_MASK+1];
+ u32 idx;
+ } hndl;
+} isr_statistics;
+
+void dbg_interrupt(u32 intmask)
+{
+ if (!intmask) {
+ isr_statistics.none++;
+ return;
+ }
+
+ isr_statistics.hndl.buf[isr_statistics.hndl.idx++] = intmask;
+ isr_statistics.hndl.idx &= ISR_MASK;
+ isr_statistics.hndl.cnt++;
+
+ if (USBi_URI & intmask)
+ isr_statistics.uri++;
+ if (USBi_PCI & intmask)
+ isr_statistics.pci++;
+ if (USBi_UEI & intmask)
+ isr_statistics.uei++;
+ if (USBi_UI & intmask)
+ isr_statistics.ui++;
+ if (USBi_SLI & intmask)
+ isr_statistics.sli++;
+}
+
+/**
+ * hw_register_read: reads all device registers (execute without interruption)
+ * @buf: destination buffer
+ * @size: buffer size
+ *
+ * This function returns number of registers read
+ */
+static size_t hw_register_read(struct ci13xxx *udc, u32 *buf, size_t size)
+{
+ unsigned i;
+
+ if (size > udc->hw_bank.size)
+ size = udc->hw_bank.size;
+
+ for (i = 0; i < size; i++)
+ buf[i] = hw_read(udc, i * sizeof(u32), ~0);
+
+ return size;
+}
+
+/**
+ * hw_register_write: writes to register
+ * @addr: register address
+ * @data: register value
+ *
+ * This function returns an error code
+ */
+static int hw_register_write(struct ci13xxx *udc, u16 addr, u32 data)
+{
+ /* align */
+ addr /= sizeof(u32);
+
+ if (addr >= udc->hw_bank.size)
+ return -EINVAL;
+
+ /* align */
+ addr *= sizeof(u32);
+
+ hw_write(udc, addr, ~0, data);
+ return 0;
+}
+
+/**
+ * hw_intr_clear: disables interrupt & clears interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_clear(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, OP_USBINTR, BIT(n), 0);
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ return 0;
+}
+
+/**
+ * hw_intr_force: enables interrupt & forces interrupt status (execute without
+ * interruption)
+ * @n: interrupt bit
+ *
+ * This function returns an error code
+ */
+static int hw_intr_force(struct ci13xxx *udc, int n)
+{
+ if (n >= REG_BITS)
+ return -EINVAL;
+
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, TESTMODE_FORCE);
+ hw_write(udc, OP_USBINTR, BIT(n), BIT(n));
+ hw_write(udc, OP_USBSTS, BIT(n), BIT(n));
+ hw_write(udc, CAP_TESTMODE, TESTMODE_FORCE, 0);
+ return 0;
+}
+
+/**
+ * show_device: prints information about device capabilities and status
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_device(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget *gadget = &udc->gadget;
+ int n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "speed = %d\n",
+ gadget->speed);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "max_speed = %d\n",
+ gadget->max_speed);
+ /* TODO: Scheduled for removal in 3.8. */
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_dualspeed = %d\n",
+ gadget_is_dualspeed(gadget));
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_otg = %d\n",
+ gadget->is_otg);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "is_a_peripheral = %d\n",
+ gadget->is_a_peripheral);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "b_hnp_enable = %d\n",
+ gadget->b_hnp_enable);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_hnp_support = %d\n",
+ gadget->a_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "a_alt_hnp_support = %d\n",
+ gadget->a_alt_hnp_support);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "name = %s\n",
+ (gadget->name ? gadget->name : ""));
+
+ return n;
+}
+static DEVICE_ATTR(device, S_IRUSR, show_device, NULL);
+
+/**
+ * show_driver: prints information about attached gadget (if any)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_driver(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ struct usb_gadget_driver *driver = udc->driver;
+ int n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ if (driver == NULL)
+ return scnprintf(buf, PAGE_SIZE,
+ "There is no gadget attached!\n");
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "function = %s\n",
+ (driver->function ? driver->function : ""));
+ n += scnprintf(buf + n, PAGE_SIZE - n, "max speed = %d\n",
+ driver->max_speed);
+
+ return n;
+}
+static DEVICE_ATTR(driver, S_IRUSR, show_driver, NULL);
+
+/* Maximum event message length */
+#define DBG_DATA_MSG 64UL
+
+/* Maximum event messages */
+#define DBG_DATA_MAX 128UL
+
+/* Event buffer descriptor */
+static struct {
+ char (buf[DBG_DATA_MAX])[DBG_DATA_MSG]; /* buffer */
+ unsigned idx; /* index */
+ unsigned tty; /* print to console? */
+ rwlock_t lck; /* lock */
+} dbg_data = {
+ .idx = 0,
+ .tty = 0,
+ .lck = __RW_LOCK_UNLOCKED(lck)
+};
+
+/**
+ * dbg_dec: decrements debug event index
+ * @idx: buffer index
+ */
+static void dbg_dec(unsigned *idx)
+{
+ *idx = (*idx - 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_inc: increments debug event index
+ * @idx: buffer index
+ */
+static void dbg_inc(unsigned *idx)
+{
+ *idx = (*idx + 1) & (DBG_DATA_MAX-1);
+}
+
+/**
+ * dbg_print: prints the common part of the event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ * @extra: extra information
+ */
+static void dbg_print(u8 addr, const char *name, int status, const char *extra)
+{
+ struct timeval tval;
+ unsigned int stamp;
+ unsigned long flags;
+
+ write_lock_irqsave(&dbg_data.lck, flags);
+
+ do_gettimeofday(&tval);
+ stamp = tval.tv_sec & 0xFFFF; /* 2^32 = 4294967296. Limit to 4096s */
+ stamp = stamp * 1000000 + tval.tv_usec;
+
+ scnprintf(dbg_data.buf[dbg_data.idx], DBG_DATA_MSG,
+ "%04X\t? %02X %-7.7s %4i ?\t%s\n",
+ stamp, addr, name, status, extra);
+
+ dbg_inc(&dbg_data.idx);
+
+ write_unlock_irqrestore(&dbg_data.lck, flags);
+
+ if (dbg_data.tty != 0)
+ pr_notice("%04X\t? %02X %-7.7s %4i ?\t%s\n",
+ stamp, addr, name, status, extra);
+}
+
+/**
+ * dbg_done: prints a DONE event
+ * @addr: endpoint address
+ * @td: transfer descriptor
+ * @status: status
+ */
+void dbg_done(u8 addr, const u32 token, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ scnprintf(msg, sizeof(msg), "%d %02X",
+ (int)(token & TD_TOTAL_BYTES) >> ffs_nr(TD_TOTAL_BYTES),
+ (int)(token & TD_STATUS) >> ffs_nr(TD_STATUS));
+ dbg_print(addr, "DONE", status, msg);
+}
+
+/**
+ * dbg_event: prints a generic event
+ * @addr: endpoint address
+ * @name: event name
+ * @status: status
+ */
+void dbg_event(u8 addr, const char *name, int status)
+{
+ if (name != NULL)
+ dbg_print(addr, name, status, "");
+}
+
+/*
+ * dbg_queue: prints a QUEUE event
+ * @addr: endpoint address
+ * @req: USB request
+ * @status: status
+ */
+void dbg_queue(u8 addr, const struct usb_request *req, int status)
+{
+ char msg[DBG_DATA_MSG];
+
+ if (req != NULL) {
+ scnprintf(msg, sizeof(msg),
+ "%d %d", !req->no_interrupt, req->length);
+ dbg_print(addr, "QUEUE", status, msg);
+ }
+}
+
+/**
+ * dbg_setup: prints a SETUP event
+ * @addr: endpoint address
+ * @req: setup request
+ */
+void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
+{
+ char msg[DBG_DATA_MSG];
+
+ if (req != NULL) {
+ scnprintf(msg, sizeof(msg),
+ "%02X %02X %04X %04X %d", req->bRequestType,
+ req->bRequest, le16_to_cpu(req->wValue),
+ le16_to_cpu(req->wIndex), le16_to_cpu(req->wLength));
+ dbg_print(addr, "SETUP", 0, msg);
+ }
+}
+
+/**
+ * show_events: displays the event buffer
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_events(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev->parent, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ read_lock_irqsave(&dbg_data.lck, flags);
+
+ i = dbg_data.idx;
+ for (dbg_dec(&i); i != dbg_data.idx; dbg_dec(&i)) {
+ n += strlen(dbg_data.buf[i]);
+ if (n >= PAGE_SIZE) {
+ n -= strlen(dbg_data.buf[i]);
+ break;
+ }
+ }
+ for (j = 0, dbg_inc(&i); j < n; dbg_inc(&i))
+ j += scnprintf(buf + j, PAGE_SIZE - j,
+ "%s", dbg_data.buf[i]);
+
+ read_unlock_irqrestore(&dbg_data.lck, flags);
+
+ return n;
+}
+
+/**
+ * store_events: configure if events are going to be also printed to console
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_events(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ unsigned tty;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &tty) != 1 || tty > 1) {
+ dev_err(dev, "<1|0>: enable|disable console log\n");
+ goto done;
+ }
+
+ dbg_data.tty = tty;
+ dev_info(dev, "tty = %u", dbg_data.tty);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(events, S_IRUSR | S_IWUSR, show_events, store_events);
+
+/**
+ * show_inters: interrupt status, enable status and historic
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_inters(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 intr;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ /*n += scnprintf(buf + n, PAGE_SIZE - n,
+ "status = %08x\n", hw_read_intr_status(udc));
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "enable = %08x\n", hw_read_intr_enable(udc));*/
+
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*test = %d\n",
+ isr_statistics.test);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? ui = %d\n",
+ isr_statistics.ui);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uei = %d\n",
+ isr_statistics.uei);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? pci = %d\n",
+ isr_statistics.pci);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? uri = %d\n",
+ isr_statistics.uri);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "? sli = %d\n",
+ isr_statistics.sli);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*none = %d\n",
+ isr_statistics.none);
+ n += scnprintf(buf + n, PAGE_SIZE - n, "*hndl = %d\n",
+ isr_statistics.hndl.cnt);
+
+ for (i = isr_statistics.hndl.idx, j = 0; j <= ISR_MASK; j++, i++) {
+ i &= ISR_MASK;
+ intr = isr_statistics.hndl.buf[i];
+
+ if (USBi_UI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "ui ");
+ intr &= ~USBi_UI;
+ if (USBi_UEI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uei ");
+ intr &= ~USBi_UEI;
+ if (USBi_PCI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "pci ");
+ intr &= ~USBi_PCI;
+ if (USBi_URI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "uri ");
+ intr &= ~USBi_URI;
+ if (USBi_SLI & intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "sli ");
+ intr &= ~USBi_SLI;
+ if (intr)
+ n += scnprintf(buf + n, PAGE_SIZE - n, "??? ");
+ if (isr_statistics.hndl.buf[i])
+ n += scnprintf(buf + n, PAGE_SIZE - n, "\n");
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+
+/**
+ * store_inters: enable & force or disable an individual interrutps
+ * (to be used for test purposes only)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_inters(struct device *dev, struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned en, bit;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ goto done;
+ }
+
+ if (sscanf(buf, "%u %u", &en, &bit) != 2 || en > 1) {
+ dev_err(udc->dev, "<1|0> <bit>: enable|disable interrupt\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (en) {
+ if (hw_intr_force(udc, bit))
+ dev_err(dev, "invalid bit number\n");
+ else
+ isr_statistics.test++;
+ } else {
+ if (hw_intr_clear(udc, bit))
+ dev_err(dev, "invalid bit number\n");
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(inters, S_IRUSR | S_IWUSR, show_inters, store_inters);
+
+/**
+ * show_port_test: reads port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_port_test(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "EINVAL\n");
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ mode = hw_port_test_get(udc);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return scnprintf(buf, PAGE_SIZE, "mode = %u\n", mode);
+}
+
+/**
+ * store_port_test: writes port test mode
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_port_test(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned mode;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%u", &mode) != 1) {
+ dev_err(udc->dev, "<mode>: set port test mode");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_port_test_set(udc, mode))
+ dev_err(udc->dev, "invalid mode\n");
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(port_test, S_IRUSR | S_IWUSR,
+ show_port_test, store_port_test);
+
+/**
+ * show_qheads: DMA contents of all queue heads
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_qheads(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ unsigned i, j, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max/2; i++) {
+ struct ci13xxx_ep *mEpRx = &udc->ci13xxx_ep[i];
+ struct ci13xxx_ep *mEpTx =
+ &udc->ci13xxx_ep[i + udc->hw_ep_max/2];
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: RX=%08X TX=%08X\n",
+ i, (u32)mEpRx->qh.dma, (u32)mEpTx->qh.dma);
+ for (j = 0; j < (sizeof(struct ci13xxx_qh)/sizeof(u32)); j++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X %08X\n", j,
+ *((u32 *)mEpRx->qh.ptr + j),
+ *((u32 *)mEpTx->qh.ptr + j));
+ }
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(qheads, S_IRUSR, show_qheads, NULL);
+
+/**
+ * show_registers: dumps all registers
+ *
+ * Check "device.h" for details
+ */
+#define DUMP_ENTRIES 512
+static ssize_t show_registers(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ u32 *dump;
+ unsigned i, k, n = 0;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ dump = kmalloc(sizeof(u32) * DUMP_ENTRIES, GFP_KERNEL);
+ if (!dump) {
+ dev_err(udc->dev, "%s: out of memory\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ k = hw_register_read(udc, dump, DUMP_ENTRIES);
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ for (i = 0; i < k; i++) {
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "reg[0x%04X] = 0x%08X\n",
+ i * (unsigned)sizeof(u32), dump[i]);
+ }
+ kfree(dump);
+
+ return n;
+}
+
+/**
+ * store_registers: writes value to register address
+ *
+ * Check "device.h" for details
+ */
+static ssize_t store_registers(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long addr, data, flags;
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ goto done;
+ }
+
+ if (sscanf(buf, "%li %li", &addr, &data) != 2) {
+ dev_err(udc->dev,
+ "<addr> <data>: write data to register address\n");
+ goto done;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (hw_register_write(udc, addr, data))
+ dev_err(udc->dev, "invalid address range\n");
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ done:
+ return count;
+}
+static DEVICE_ATTR(registers, S_IRUSR | S_IWUSR,
+ show_registers, store_registers);
+
+/**
+ * show_requests: DMA contents of all requests currently queued (all endpts)
+ *
+ * Check "device.h" for details
+ */
+static ssize_t show_requests(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct ci13xxx *udc = container_of(dev, struct ci13xxx, gadget.dev);
+ unsigned long flags;
+ struct list_head *ptr = NULL;
+ struct ci13xxx_req *req = NULL;
+ unsigned i, j, n = 0, qSize = sizeof(struct ci13xxx_td)/sizeof(u32);
+
+ if (attr == NULL || buf == NULL) {
+ dev_err(udc->dev, "[%s] EINVAL\n", __func__);
+ return 0;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ for (i = 0; i < udc->hw_ep_max; i++)
+ list_for_each(ptr, &udc->ci13xxx_ep[i].qh.queue)
+ {
+ req = list_entry(ptr, struct ci13xxx_req, queue);
+
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "EP=%02i: TD=%08X %s\n",
+ i % udc->hw_ep_max/2, (u32)req->dma,
+ ((i < udc->hw_ep_max/2) ? "RX" : "TX"));
+
+ for (j = 0; j < qSize; j++)
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ " %04X: %08X\n", j,
+ *((u32 *)req->ptr + j));
+ }
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return n;
+}
+static DEVICE_ATTR(requests, S_IRUSR, show_requests, NULL);
+
+/**
+ * dbg_create_files: initializes the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+int dbg_create_files(struct device *dev)
+{
+ int retval = 0;
+
+ if (dev == NULL)
+ return -EINVAL;
+ retval = device_create_file(dev, &dev_attr_device);
+ if (retval)
+ goto done;
+ retval = device_create_file(dev, &dev_attr_driver);
+ if (retval)
+ goto rm_device;
+ retval = device_create_file(dev, &dev_attr_events);
+ if (retval)
+ goto rm_driver;
+ retval = device_create_file(dev, &dev_attr_inters);
+ if (retval)
+ goto rm_events;
+ retval = device_create_file(dev, &dev_attr_port_test);
+ if (retval)
+ goto rm_inters;
+ retval = device_create_file(dev, &dev_attr_qheads);
+ if (retval)
+ goto rm_port_test;
+ retval = device_create_file(dev, &dev_attr_registers);
+ if (retval)
+ goto rm_qheads;
+ retval = device_create_file(dev, &dev_attr_requests);
+ if (retval)
+ goto rm_registers;
+ return 0;
+
+ rm_registers:
+ device_remove_file(dev, &dev_attr_registers);
+ rm_qheads:
+ device_remove_file(dev, &dev_attr_qheads);
+ rm_port_test:
+ device_remove_file(dev, &dev_attr_port_test);
+ rm_inters:
+ device_remove_file(dev, &dev_attr_inters);
+ rm_events:
+ device_remove_file(dev, &dev_attr_events);
+ rm_driver:
+ device_remove_file(dev, &dev_attr_driver);
+ rm_device:
+ device_remove_file(dev, &dev_attr_device);
+ done:
+ return retval;
+}
+
+/**
+ * dbg_remove_files: destroys the attribute interface
+ * @dev: device
+ *
+ * This function returns an error code
+ */
+int dbg_remove_files(struct device *dev)
+{
+ if (dev == NULL)
+ return -EINVAL;
+ device_remove_file(dev, &dev_attr_requests);
+ device_remove_file(dev, &dev_attr_registers);
+ device_remove_file(dev, &dev_attr_qheads);
+ device_remove_file(dev, &dev_attr_port_test);
+ device_remove_file(dev, &dev_attr_inters);
+ device_remove_file(dev, &dev_attr_events);
+ device_remove_file(dev, &dev_attr_driver);
+ device_remove_file(dev, &dev_attr_device);
+ return 0;
+}
--- /dev/null
+/*
+ * debug.h - ChipIdea USB driver debug interfaces
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_DEBUG_H
+#define __DRIVERS_USB_CHIPIDEA_DEBUG_H
+
+#ifdef CONFIG_USB_CHIPIDEA_DEBUG
+void dbg_interrupt(u32 intmask);
+void dbg_done(u8 addr, const u32 token, int status);
+void dbg_event(u8 addr, const char *name, int status);
+void dbg_queue(u8 addr, const struct usb_request *req, int status);
+void dbg_setup(u8 addr, const struct usb_ctrlrequest *req);
+int dbg_create_files(struct device *dev);
+int dbg_remove_files(struct device *dev);
+#else
+static inline void dbg_interrupt(u32 intmask)
+{
+}
+
+static inline void dbg_done(u8 addr, const u32 token, int status)
+{
+}
+
+static inline void dbg_event(u8 addr, const char *name, int status)
+{
+}
+
+static inline void dbg_queue(u8 addr, const struct usb_request *req, int status)
+{
+}
+
+static inline void dbg_setup(u8 addr, const struct usb_ctrlrequest *req)
+{
+}
+
+static inline int dbg_create_files(struct device *dev)
+{
+ return 0;
+}
+
+static inline int dbg_remove_files(struct device *dev)
+{
+ return 0;
+}
+#endif
+
+#endif /* __DRIVERS_USB_CHIPIDEA_DEBUG_H */
--- /dev/null
+/*
+ * udc.h - ChipIdea UDC driver
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dmapool.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/pm_runtime.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/chipidea.h>
+
+#include "ci.h"
+#include "udc.h"
+#include "bits.h"
+#include "debug.h"
+
+/* control endpoint description */
+static const struct usb_endpoint_descriptor
+ctrl_endpt_out_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_OUT,
+ .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
+ .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
+};
+
+static const struct usb_endpoint_descriptor
+ctrl_endpt_in_desc = {
+ .bLength = USB_DT_ENDPOINT_SIZE,
+ .bDescriptorType = USB_DT_ENDPOINT,
+
+ .bEndpointAddress = USB_DIR_IN,
+ .bmAttributes = USB_ENDPOINT_XFER_CONTROL,
+ .wMaxPacketSize = cpu_to_le16(CTRL_PAYLOAD_MAX),
+};
+
+/**
+ * hw_ep_bit: calculates the bit number
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns bit number
+ */
+static inline int hw_ep_bit(int num, int dir)
+{
+ return num + (dir ? 16 : 0);
+}
+
+static inline int ep_to_bit(struct ci13xxx *udc, int n)
+{
+ int fill = 16 - udc->hw_ep_max / 2;
+
+ if (n >= udc->hw_ep_max / 2)
+ n += fill;
+
+ return n;
+}
+
+/**
+ * hw_device_state: enables/disables interrupts & starts/stops device (execute
+ * without interruption)
+ * @dma: 0 => disable, !0 => enable and set dma engine
+ *
+ * This function returns an error code
+ */
+static int hw_device_state(struct ci13xxx *udc, u32 dma)
+{
+ if (dma) {
+ hw_write(udc, OP_ENDPTLISTADDR, ~0, dma);
+ /* interrupt, error, port change, reset, sleep/suspend */
+ hw_write(udc, OP_USBINTR, ~0,
+ USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
+ hw_write(udc, OP_USBCMD, USBCMD_RS, USBCMD_RS);
+ } else {
+ hw_write(udc, OP_USBCMD, USBCMD_RS, 0);
+ hw_write(udc, OP_USBINTR, ~0, 0);
+ }
+ return 0;
+}
+
+/**
+ * hw_ep_flush: flush endpoint fifo (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns an error code
+ */
+static int hw_ep_flush(struct ci13xxx *udc, int num, int dir)
+{
+ int n = hw_ep_bit(num, dir);
+
+ do {
+ /* flush any pending transfer */
+ hw_write(udc, OP_ENDPTFLUSH, BIT(n), BIT(n));
+ while (hw_read(udc, OP_ENDPTFLUSH, BIT(n)))
+ cpu_relax();
+ } while (hw_read(udc, OP_ENDPTSTAT, BIT(n)));
+
+ return 0;
+}
+
+/**
+ * hw_ep_disable: disables endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns an error code
+ */
+static int hw_ep_disable(struct ci13xxx *udc, int num, int dir)
+{
+ hw_ep_flush(udc, num, dir);
+ hw_write(udc, OP_ENDPTCTRL + num,
+ dir ? ENDPTCTRL_TXE : ENDPTCTRL_RXE, 0);
+ return 0;
+}
+
+/**
+ * hw_ep_enable: enables endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @type: endpoint type
+ *
+ * This function returns an error code
+ */
+static int hw_ep_enable(struct ci13xxx *udc, int num, int dir, int type)
+{
+ u32 mask, data;
+
+ if (dir) {
+ mask = ENDPTCTRL_TXT; /* type */
+ data = type << ffs_nr(mask);
+
+ mask |= ENDPTCTRL_TXS; /* unstall */
+ mask |= ENDPTCTRL_TXR; /* reset data toggle */
+ data |= ENDPTCTRL_TXR;
+ mask |= ENDPTCTRL_TXE; /* enable */
+ data |= ENDPTCTRL_TXE;
+ } else {
+ mask = ENDPTCTRL_RXT; /* type */
+ data = type << ffs_nr(mask);
+
+ mask |= ENDPTCTRL_RXS; /* unstall */
+ mask |= ENDPTCTRL_RXR; /* reset data toggle */
+ data |= ENDPTCTRL_RXR;
+ mask |= ENDPTCTRL_RXE; /* enable */
+ data |= ENDPTCTRL_RXE;
+ }
+ hw_write(udc, OP_ENDPTCTRL + num, mask, data);
+ return 0;
+}
+
+/**
+ * hw_ep_get_halt: return endpoint halt status
+ * @num: endpoint number
+ * @dir: endpoint direction
+ *
+ * This function returns 1 if endpoint halted
+ */
+static int hw_ep_get_halt(struct ci13xxx *udc, int num, int dir)
+{
+ u32 mask = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
+
+ return hw_read(udc, OP_ENDPTCTRL + num, mask) ? 1 : 0;
+}
+
+/**
+ * hw_test_and_clear_setup_status: test & clear setup status (execute without
+ * interruption)
+ * @n: endpoint number
+ *
+ * This function returns setup status
+ */
+static int hw_test_and_clear_setup_status(struct ci13xxx *udc, int n)
+{
+ n = ep_to_bit(udc, n);
+ return hw_test_and_clear(udc, OP_ENDPTSETUPSTAT, BIT(n));
+}
+
+/**
+ * hw_ep_prime: primes endpoint (execute without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @is_ctrl: true if control endpoint
+ *
+ * This function returns an error code
+ */
+static int hw_ep_prime(struct ci13xxx *udc, int num, int dir, int is_ctrl)
+{
+ int n = hw_ep_bit(num, dir);
+
+ if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num)))
+ return -EAGAIN;
+
+ hw_write(udc, OP_ENDPTPRIME, BIT(n), BIT(n));
+
+ while (hw_read(udc, OP_ENDPTPRIME, BIT(n)))
+ cpu_relax();
+ if (is_ctrl && dir == RX && hw_read(udc, OP_ENDPTSETUPSTAT, BIT(num)))
+ return -EAGAIN;
+
+ /* status shoult be tested according with manual but it doesn't work */
+ return 0;
+}
+
+/**
+ * hw_ep_set_halt: configures ep halt & resets data toggle after clear (execute
+ * without interruption)
+ * @num: endpoint number
+ * @dir: endpoint direction
+ * @value: true => stall, false => unstall
+ *
+ * This function returns an error code
+ */
+static int hw_ep_set_halt(struct ci13xxx *udc, int num, int dir, int value)
+{
+ if (value != 0 && value != 1)
+ return -EINVAL;
+
+ do {
+ enum ci13xxx_regs reg = OP_ENDPTCTRL + num;
+ u32 mask_xs = dir ? ENDPTCTRL_TXS : ENDPTCTRL_RXS;
+ u32 mask_xr = dir ? ENDPTCTRL_TXR : ENDPTCTRL_RXR;
+
+ /* data toggle - reserved for EP0 but it's in ESS */
+ hw_write(udc, reg, mask_xs|mask_xr,
+ value ? mask_xs : mask_xr);
+ } while (value != hw_ep_get_halt(udc, num, dir));
+
+ return 0;
+}
+
+/**
+ * hw_is_port_high_speed: test if port is high speed
+ *
+ * This function returns true if high speed port
+ */
+static int hw_port_is_high_speed(struct ci13xxx *udc)
+{
+ return udc->hw_bank.lpm ? hw_read(udc, OP_DEVLC, DEVLC_PSPD) :
+ hw_read(udc, OP_PORTSC, PORTSC_HSP);
+}
+
+/**
+ * hw_read_intr_enable: returns interrupt enable register
+ *
+ * This function returns register data
+ */
+static u32 hw_read_intr_enable(struct ci13xxx *udc)
+{
+ return hw_read(udc, OP_USBINTR, ~0);
+}
+
+/**
+ * hw_read_intr_status: returns interrupt status register
+ *
+ * This function returns register data
+ */
+static u32 hw_read_intr_status(struct ci13xxx *udc)
+{
+ return hw_read(udc, OP_USBSTS, ~0);
+}
+
+/**
+ * hw_test_and_clear_complete: test & clear complete status (execute without
+ * interruption)
+ * @n: endpoint number
+ *
+ * This function returns complete status
+ */
+static int hw_test_and_clear_complete(struct ci13xxx *udc, int n)
+{
+ n = ep_to_bit(udc, n);
+ return hw_test_and_clear(udc, OP_ENDPTCOMPLETE, BIT(n));
+}
+
+/**
+ * hw_test_and_clear_intr_active: test & clear active interrupts (execute
+ * without interruption)
+ *
+ * This function returns active interrutps
+ */
+static u32 hw_test_and_clear_intr_active(struct ci13xxx *udc)
+{
+ u32 reg = hw_read_intr_status(udc) & hw_read_intr_enable(udc);
+
+ hw_write(udc, OP_USBSTS, ~0, reg);
+ return reg;
+}
+
+/**
+ * hw_test_and_clear_setup_guard: test & clear setup guard (execute without
+ * interruption)
+ *
+ * This function returns guard value
+ */
+static int hw_test_and_clear_setup_guard(struct ci13xxx *udc)
+{
+ return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, 0);
+}
+
+/**
+ * hw_test_and_set_setup_guard: test & set setup guard (execute without
+ * interruption)
+ *
+ * This function returns guard value
+ */
+static int hw_test_and_set_setup_guard(struct ci13xxx *udc)
+{
+ return hw_test_and_write(udc, OP_USBCMD, USBCMD_SUTW, USBCMD_SUTW);
+}
+
+/**
+ * hw_usb_set_address: configures USB address (execute without interruption)
+ * @value: new USB address
+ *
+ * This function explicitly sets the address, without the "USBADRA" (advance)
+ * feature, which is not supported by older versions of the controller.
+ */
+static void hw_usb_set_address(struct ci13xxx *udc, u8 value)
+{
+ hw_write(udc, OP_DEVICEADDR, DEVICEADDR_USBADR,
+ value << ffs_nr(DEVICEADDR_USBADR));
+}
+
+/**
+ * hw_usb_reset: restart device after a bus reset (execute without
+ * interruption)
+ *
+ * This function returns an error code
+ */
+static int hw_usb_reset(struct ci13xxx *udc)
+{
+ hw_usb_set_address(udc, 0);
+
+ /* ESS flushes only at end?!? */
+ hw_write(udc, OP_ENDPTFLUSH, ~0, ~0);
+
+ /* clear setup token semaphores */
+ hw_write(udc, OP_ENDPTSETUPSTAT, 0, 0);
+
+ /* clear complete status */
+ hw_write(udc, OP_ENDPTCOMPLETE, 0, 0);
+
+ /* wait until all bits cleared */
+ while (hw_read(udc, OP_ENDPTPRIME, ~0))
+ udelay(10); /* not RTOS friendly */
+
+ /* reset all endpoints ? */
+
+ /* reset internal status and wait for further instructions
+ no need to verify the port reset status (ESS does it) */
+
+ return 0;
+}
+
+/******************************************************************************
+ * UTIL block
+ *****************************************************************************/
+/**
+ * _usb_addr: calculates endpoint address from direction & number
+ * @ep: endpoint
+ */
+static inline u8 _usb_addr(struct ci13xxx_ep *ep)
+{
+ return ((ep->dir == TX) ? USB_ENDPOINT_DIR_MASK : 0) | ep->num;
+}
+
+/**
+ * _hardware_queue: configures a request at hardware level
+ * @gadget: gadget
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ */
+static int _hardware_enqueue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
+{
+ struct ci13xxx *udc = mEp->udc;
+ unsigned i;
+ int ret = 0;
+ unsigned length = mReq->req.length;
+
+ /* don't queue twice */
+ if (mReq->req.status == -EALREADY)
+ return -EALREADY;
+
+ mReq->req.status = -EALREADY;
+ if (length && mReq->req.dma == DMA_ADDR_INVALID) {
+ mReq->req.dma = \
+ dma_map_single(mEp->device, mReq->req.buf,
+ length, mEp->dir ? DMA_TO_DEVICE :
+ DMA_FROM_DEVICE);
+ if (mReq->req.dma == 0)
+ return -ENOMEM;
+
+ mReq->map = 1;
+ }
+
+ if (mReq->req.zero && length && (length % mEp->ep.maxpacket == 0)) {
+ mReq->zptr = dma_pool_alloc(mEp->td_pool, GFP_ATOMIC,
+ &mReq->zdma);
+ if (mReq->zptr == NULL) {
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma,
+ length, mEp->dir ? DMA_TO_DEVICE :
+ DMA_FROM_DEVICE);
+ mReq->req.dma = DMA_ADDR_INVALID;
+ mReq->map = 0;
+ }
+ return -ENOMEM;
+ }
+ memset(mReq->zptr, 0, sizeof(*mReq->zptr));
+ mReq->zptr->next = TD_TERMINATE;
+ mReq->zptr->token = TD_STATUS_ACTIVE;
+ if (!mReq->req.no_interrupt)
+ mReq->zptr->token |= TD_IOC;
+ }
+ /*
+ * TD configuration
+ * TODO - handle requests which spawns into several TDs
+ */
+ memset(mReq->ptr, 0, sizeof(*mReq->ptr));
+ mReq->ptr->token = length << ffs_nr(TD_TOTAL_BYTES);
+ mReq->ptr->token &= TD_TOTAL_BYTES;
+ mReq->ptr->token |= TD_STATUS_ACTIVE;
+ if (mReq->zptr) {
+ mReq->ptr->next = mReq->zdma;
+ } else {
+ mReq->ptr->next = TD_TERMINATE;
+ if (!mReq->req.no_interrupt)
+ mReq->ptr->token |= TD_IOC;
+ }
+ mReq->ptr->page[0] = mReq->req.dma;
+ for (i = 1; i < 5; i++)
+ mReq->ptr->page[i] =
+ (mReq->req.dma + i * CI13XXX_PAGE_SIZE) & ~TD_RESERVED_MASK;
+
+ if (!list_empty(&mEp->qh.queue)) {
+ struct ci13xxx_req *mReqPrev;
+ int n = hw_ep_bit(mEp->num, mEp->dir);
+ int tmp_stat;
+
+ mReqPrev = list_entry(mEp->qh.queue.prev,
+ struct ci13xxx_req, queue);
+ if (mReqPrev->zptr)
+ mReqPrev->zptr->next = mReq->dma & TD_ADDR_MASK;
+ else
+ mReqPrev->ptr->next = mReq->dma & TD_ADDR_MASK;
+ wmb();
+ if (hw_read(udc, OP_ENDPTPRIME, BIT(n)))
+ goto done;
+ do {
+ hw_write(udc, OP_USBCMD, USBCMD_ATDTW, USBCMD_ATDTW);
+ tmp_stat = hw_read(udc, OP_ENDPTSTAT, BIT(n));
+ } while (!hw_read(udc, OP_USBCMD, USBCMD_ATDTW));
+ hw_write(udc, OP_USBCMD, USBCMD_ATDTW, 0);
+ if (tmp_stat)
+ goto done;
+ }
+
+ /* QH configuration */
+ mEp->qh.ptr->td.next = mReq->dma; /* TERMINATE = 0 */
+ mEp->qh.ptr->td.token &= ~TD_STATUS; /* clear status */
+ mEp->qh.ptr->cap |= QH_ZLT;
+
+ wmb(); /* synchronize before ep prime */
+
+ ret = hw_ep_prime(udc, mEp->num, mEp->dir,
+ mEp->type == USB_ENDPOINT_XFER_CONTROL);
+done:
+ return ret;
+}
+
+/**
+ * _hardware_dequeue: handles a request at hardware level
+ * @gadget: gadget
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ */
+static int _hardware_dequeue(struct ci13xxx_ep *mEp, struct ci13xxx_req *mReq)
+{
+ if (mReq->req.status != -EALREADY)
+ return -EINVAL;
+
+ if ((TD_STATUS_ACTIVE & mReq->ptr->token) != 0)
+ return -EBUSY;
+
+ if (mReq->zptr) {
+ if ((TD_STATUS_ACTIVE & mReq->zptr->token) != 0)
+ return -EBUSY;
+ dma_pool_free(mEp->td_pool, mReq->zptr, mReq->zdma);
+ mReq->zptr = NULL;
+ }
+
+ mReq->req.status = 0;
+
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
+ mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ mReq->req.dma = DMA_ADDR_INVALID;
+ mReq->map = 0;
+ }
+
+ mReq->req.status = mReq->ptr->token & TD_STATUS;
+ if ((TD_STATUS_HALTED & mReq->req.status) != 0)
+ mReq->req.status = -1;
+ else if ((TD_STATUS_DT_ERR & mReq->req.status) != 0)
+ mReq->req.status = -1;
+ else if ((TD_STATUS_TR_ERR & mReq->req.status) != 0)
+ mReq->req.status = -1;
+
+ mReq->req.actual = mReq->ptr->token & TD_TOTAL_BYTES;
+ mReq->req.actual >>= ffs_nr(TD_TOTAL_BYTES);
+ mReq->req.actual = mReq->req.length - mReq->req.actual;
+ mReq->req.actual = mReq->req.status ? 0 : mReq->req.actual;
+
+ return mReq->req.actual;
+}
+
+/**
+ * _ep_nuke: dequeues all endpoint requests
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ * Caller must hold lock
+ */
+static int _ep_nuke(struct ci13xxx_ep *mEp)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ if (mEp == NULL)
+ return -EINVAL;
+
+ hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
+
+ while (!list_empty(&mEp->qh.queue)) {
+
+ /* pop oldest request */
+ struct ci13xxx_req *mReq = \
+ list_entry(mEp->qh.queue.next,
+ struct ci13xxx_req, queue);
+ list_del_init(&mReq->queue);
+ mReq->req.status = -ESHUTDOWN;
+
+ if (mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+ }
+ return 0;
+}
+
+/**
+ * _gadget_stop_activity: stops all USB activity, flushes & disables all endpts
+ * @gadget: gadget
+ *
+ * This function returns an error code
+ */
+static int _gadget_stop_activity(struct usb_gadget *gadget)
+{
+ struct usb_ep *ep;
+ struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+
+ if (gadget == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->remote_wakeup = 0;
+ udc->suspended = 0;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ /* flush all endpoints */
+ gadget_for_each_ep(ep, gadget) {
+ usb_ep_fifo_flush(ep);
+ }
+ usb_ep_fifo_flush(&udc->ep0out->ep);
+ usb_ep_fifo_flush(&udc->ep0in->ep);
+
+ if (udc->driver)
+ udc->driver->disconnect(gadget);
+
+ /* make sure to disable all endpoints */
+ gadget_for_each_ep(ep, gadget) {
+ usb_ep_disable(ep);
+ }
+
+ if (udc->status != NULL) {
+ usb_ep_free_request(&udc->ep0in->ep, udc->status);
+ udc->status = NULL;
+ }
+
+ return 0;
+}
+
+/******************************************************************************
+ * ISR block
+ *****************************************************************************/
+/**
+ * isr_reset_handler: USB reset interrupt handler
+ * @udc: UDC device
+ *
+ * This function resets USB engine after a bus reset occurred
+ */
+static void isr_reset_handler(struct ci13xxx *udc)
+__releases(udc->lock)
+__acquires(udc->lock)
+{
+ int retval;
+
+ dbg_event(0xFF, "BUS RST", 0);
+
+ spin_unlock(&udc->lock);
+ retval = _gadget_stop_activity(&udc->gadget);
+ if (retval)
+ goto done;
+
+ retval = hw_usb_reset(udc);
+ if (retval)
+ goto done;
+
+ udc->status = usb_ep_alloc_request(&udc->ep0in->ep, GFP_ATOMIC);
+ if (udc->status == NULL)
+ retval = -ENOMEM;
+
+ spin_lock(&udc->lock);
+
+ done:
+ if (retval)
+ dev_err(udc->dev, "error: %i\n", retval);
+}
+
+/**
+ * isr_get_status_complete: get_status request complete function
+ * @ep: endpoint
+ * @req: request handled
+ *
+ * Caller must release lock
+ */
+static void isr_get_status_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ if (ep == NULL || req == NULL)
+ return;
+
+ kfree(req->buf);
+ usb_ep_free_request(ep, req);
+}
+
+/**
+ * isr_get_status_response: get_status request response
+ * @udc: udc struct
+ * @setup: setup request packet
+ *
+ * This function returns an error code
+ */
+static int isr_get_status_response(struct ci13xxx *udc,
+ struct usb_ctrlrequest *setup)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ struct ci13xxx_ep *mEp = udc->ep0in;
+ struct usb_request *req = NULL;
+ gfp_t gfp_flags = GFP_ATOMIC;
+ int dir, num, retval;
+
+ if (mEp == NULL || setup == NULL)
+ return -EINVAL;
+
+ spin_unlock(mEp->lock);
+ req = usb_ep_alloc_request(&mEp->ep, gfp_flags);
+ spin_lock(mEp->lock);
+ if (req == NULL)
+ return -ENOMEM;
+
+ req->complete = isr_get_status_complete;
+ req->length = 2;
+ req->buf = kzalloc(req->length, gfp_flags);
+ if (req->buf == NULL) {
+ retval = -ENOMEM;
+ goto err_free_req;
+ }
+
+ if ((setup->bRequestType & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
+ /* Assume that device is bus powered for now. */
+ *(u16 *)req->buf = udc->remote_wakeup << 1;
+ retval = 0;
+ } else if ((setup->bRequestType & USB_RECIP_MASK) \
+ == USB_RECIP_ENDPOINT) {
+ dir = (le16_to_cpu(setup->wIndex) & USB_ENDPOINT_DIR_MASK) ?
+ TX : RX;
+ num = le16_to_cpu(setup->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+ *(u16 *)req->buf = hw_ep_get_halt(udc, num, dir);
+ }
+ /* else do nothing; reserved for future use */
+
+ spin_unlock(mEp->lock);
+ retval = usb_ep_queue(&mEp->ep, req, gfp_flags);
+ spin_lock(mEp->lock);
+ if (retval)
+ goto err_free_buf;
+
+ return 0;
+
+ err_free_buf:
+ kfree(req->buf);
+ err_free_req:
+ spin_unlock(mEp->lock);
+ usb_ep_free_request(&mEp->ep, req);
+ spin_lock(mEp->lock);
+ return retval;
+}
+
+/**
+ * isr_setup_status_complete: setup_status request complete function
+ * @ep: endpoint
+ * @req: request handled
+ *
+ * Caller must release lock. Put the port in test mode if test mode
+ * feature is selected.
+ */
+static void
+isr_setup_status_complete(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx *udc = req->context;
+ unsigned long flags;
+
+ if (udc->setaddr) {
+ hw_usb_set_address(udc, udc->address);
+ udc->setaddr = false;
+ }
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (udc->test_mode)
+ hw_port_test_set(udc, udc->test_mode);
+ spin_unlock_irqrestore(&udc->lock, flags);
+}
+
+/**
+ * isr_setup_status_phase: queues the status phase of a setup transation
+ * @udc: udc struct
+ *
+ * This function returns an error code
+ */
+static int isr_setup_status_phase(struct ci13xxx *udc)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ int retval;
+ struct ci13xxx_ep *mEp;
+
+ mEp = (udc->ep0_dir == TX) ? udc->ep0out : udc->ep0in;
+ udc->status->context = udc;
+ udc->status->complete = isr_setup_status_complete;
+
+ spin_unlock(mEp->lock);
+ retval = usb_ep_queue(&mEp->ep, udc->status, GFP_ATOMIC);
+ spin_lock(mEp->lock);
+
+ return retval;
+}
+
+/**
+ * isr_tr_complete_low: transaction complete low level handler
+ * @mEp: endpoint
+ *
+ * This function returns an error code
+ * Caller must hold lock
+ */
+static int isr_tr_complete_low(struct ci13xxx_ep *mEp)
+__releases(mEp->lock)
+__acquires(mEp->lock)
+{
+ struct ci13xxx_req *mReq, *mReqTemp;
+ struct ci13xxx_ep *mEpTemp = mEp;
+ int uninitialized_var(retval);
+
+ if (list_empty(&mEp->qh.queue))
+ return -EINVAL;
+
+ list_for_each_entry_safe(mReq, mReqTemp, &mEp->qh.queue,
+ queue) {
+ retval = _hardware_dequeue(mEp, mReq);
+ if (retval < 0)
+ break;
+ list_del_init(&mReq->queue);
+ dbg_done(_usb_addr(mEp), mReq->ptr->token, retval);
+ if (mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ if ((mEp->type == USB_ENDPOINT_XFER_CONTROL) &&
+ mReq->req.length)
+ mEpTemp = mEp->udc->ep0in;
+ mReq->req.complete(&mEpTemp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+ }
+
+ if (retval == -EBUSY)
+ retval = 0;
+ if (retval < 0)
+ dbg_event(_usb_addr(mEp), "DONE", retval);
+
+ return retval;
+}
+
+/**
+ * isr_tr_complete_handler: transaction complete interrupt handler
+ * @udc: UDC descriptor
+ *
+ * This function handles traffic events
+ */
+static void isr_tr_complete_handler(struct ci13xxx *udc)
+__releases(udc->lock)
+__acquires(udc->lock)
+{
+ unsigned i;
+ u8 tmode = 0;
+
+ for (i = 0; i < udc->hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+ int type, num, dir, err = -EINVAL;
+ struct usb_ctrlrequest req;
+
+ if (mEp->ep.desc == NULL)
+ continue; /* not configured */
+
+ if (hw_test_and_clear_complete(udc, i)) {
+ err = isr_tr_complete_low(mEp);
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+ if (err > 0) /* needs status phase */
+ err = isr_setup_status_phase(udc);
+ if (err < 0) {
+ dbg_event(_usb_addr(mEp),
+ "ERROR", err);
+ spin_unlock(&udc->lock);
+ if (usb_ep_set_halt(&mEp->ep))
+ dev_err(udc->dev,
+ "error: ep_set_halt\n");
+ spin_lock(&udc->lock);
+ }
+ }
+ }
+
+ if (mEp->type != USB_ENDPOINT_XFER_CONTROL ||
+ !hw_test_and_clear_setup_status(udc, i))
+ continue;
+
+ if (i != 0) {
+ dev_warn(udc->dev, "ctrl traffic at endpoint %d\n", i);
+ continue;
+ }
+
+ /*
+ * Flush data and handshake transactions of previous
+ * setup packet.
+ */
+ _ep_nuke(udc->ep0out);
+ _ep_nuke(udc->ep0in);
+
+ /* read_setup_packet */
+ do {
+ hw_test_and_set_setup_guard(udc);
+ memcpy(&req, &mEp->qh.ptr->setup, sizeof(req));
+ } while (!hw_test_and_clear_setup_guard(udc));
+
+ type = req.bRequestType;
+
+ udc->ep0_dir = (type & USB_DIR_IN) ? TX : RX;
+
+ dbg_setup(_usb_addr(mEp), &req);
+
+ switch (req.bRequest) {
+ case USB_REQ_CLEAR_FEATURE:
+ if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) ==
+ USB_ENDPOINT_HALT) {
+ if (req.wLength != 0)
+ break;
+ num = le16_to_cpu(req.wIndex);
+ dir = num & USB_ENDPOINT_DIR_MASK;
+ num &= USB_ENDPOINT_NUMBER_MASK;
+ if (dir) /* TX */
+ num += udc->hw_ep_max/2;
+ if (!udc->ci13xxx_ep[num].wedge) {
+ spin_unlock(&udc->lock);
+ err = usb_ep_clear_halt(
+ &udc->ci13xxx_ep[num].ep);
+ spin_lock(&udc->lock);
+ if (err)
+ break;
+ }
+ err = isr_setup_status_phase(udc);
+ } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE) &&
+ le16_to_cpu(req.wValue) ==
+ USB_DEVICE_REMOTE_WAKEUP) {
+ if (req.wLength != 0)
+ break;
+ udc->remote_wakeup = 0;
+ err = isr_setup_status_phase(udc);
+ } else {
+ goto delegate;
+ }
+ break;
+ case USB_REQ_GET_STATUS:
+ if (type != (USB_DIR_IN|USB_RECIP_DEVICE) &&
+ type != (USB_DIR_IN|USB_RECIP_ENDPOINT) &&
+ type != (USB_DIR_IN|USB_RECIP_INTERFACE))
+ goto delegate;
+ if (le16_to_cpu(req.wLength) != 2 ||
+ le16_to_cpu(req.wValue) != 0)
+ break;
+ err = isr_get_status_response(udc, &req);
+ break;
+ case USB_REQ_SET_ADDRESS:
+ if (type != (USB_DIR_OUT|USB_RECIP_DEVICE))
+ goto delegate;
+ if (le16_to_cpu(req.wLength) != 0 ||
+ le16_to_cpu(req.wIndex) != 0)
+ break;
+ udc->address = (u8)le16_to_cpu(req.wValue);
+ udc->setaddr = true;
+ err = isr_setup_status_phase(udc);
+ break;
+ case USB_REQ_SET_FEATURE:
+ if (type == (USB_DIR_OUT|USB_RECIP_ENDPOINT) &&
+ le16_to_cpu(req.wValue) ==
+ USB_ENDPOINT_HALT) {
+ if (req.wLength != 0)
+ break;
+ num = le16_to_cpu(req.wIndex);
+ dir = num & USB_ENDPOINT_DIR_MASK;
+ num &= USB_ENDPOINT_NUMBER_MASK;
+ if (dir) /* TX */
+ num += udc->hw_ep_max/2;
+
+ spin_unlock(&udc->lock);
+ err = usb_ep_set_halt(&udc->ci13xxx_ep[num].ep);
+ spin_lock(&udc->lock);
+ if (!err)
+ isr_setup_status_phase(udc);
+ } else if (type == (USB_DIR_OUT|USB_RECIP_DEVICE)) {
+ if (req.wLength != 0)
+ break;
+ switch (le16_to_cpu(req.wValue)) {
+ case USB_DEVICE_REMOTE_WAKEUP:
+ udc->remote_wakeup = 1;
+ err = isr_setup_status_phase(udc);
+ break;
+ case USB_DEVICE_TEST_MODE:
+ tmode = le16_to_cpu(req.wIndex) >> 8;
+ switch (tmode) {
+ case TEST_J:
+ case TEST_K:
+ case TEST_SE0_NAK:
+ case TEST_PACKET:
+ case TEST_FORCE_EN:
+ udc->test_mode = tmode;
+ err = isr_setup_status_phase(
+ udc);
+ break;
+ default:
+ break;
+ }
+ default:
+ goto delegate;
+ }
+ } else {
+ goto delegate;
+ }
+ break;
+ default:
+delegate:
+ if (req.wLength == 0) /* no data phase */
+ udc->ep0_dir = TX;
+
+ spin_unlock(&udc->lock);
+ err = udc->driver->setup(&udc->gadget, &req);
+ spin_lock(&udc->lock);
+ break;
+ }
+
+ if (err < 0) {
+ dbg_event(_usb_addr(mEp), "ERROR", err);
+
+ spin_unlock(&udc->lock);
+ if (usb_ep_set_halt(&mEp->ep))
+ dev_err(udc->dev, "error: ep_set_halt\n");
+ spin_lock(&udc->lock);
+ }
+ }
+}
+
+/******************************************************************************
+ * ENDPT block
+ *****************************************************************************/
+/**
+ * ep_enable: configure endpoint, making it usable
+ *
+ * Check usb_ep_enable() at "usb_gadget.h" for details
+ */
+static int ep_enable(struct usb_ep *ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int retval = 0;
+ unsigned long flags;
+
+ if (ep == NULL || desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ /* only internal SW should enable ctrl endpts */
+
+ mEp->ep.desc = desc;
+
+ if (!list_empty(&mEp->qh.queue))
+ dev_warn(mEp->udc->dev, "enabling a non-empty endpoint!\n");
+
+ mEp->dir = usb_endpoint_dir_in(desc) ? TX : RX;
+ mEp->num = usb_endpoint_num(desc);
+ mEp->type = usb_endpoint_type(desc);
+
+ mEp->ep.maxpacket = usb_endpoint_maxp(desc);
+
+ dbg_event(_usb_addr(mEp), "ENABLE", 0);
+
+ mEp->qh.ptr->cap = 0;
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->qh.ptr->cap |= QH_IOS;
+ else if (mEp->type == USB_ENDPOINT_XFER_ISOC)
+ mEp->qh.ptr->cap &= ~QH_MULT;
+ else
+ mEp->qh.ptr->cap &= ~QH_ZLT;
+
+ mEp->qh.ptr->cap |=
+ (mEp->ep.maxpacket << ffs_nr(QH_MAX_PKT)) & QH_MAX_PKT;
+ mEp->qh.ptr->td.next |= TD_TERMINATE; /* needed? */
+
+ /*
+ * Enable endpoints in the HW other than ep0 as ep0
+ * is always enabled
+ */
+ if (mEp->num)
+ retval |= hw_ep_enable(mEp->udc, mEp->num, mEp->dir, mEp->type);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_disable: endpoint is no longer usable
+ *
+ * Check usb_ep_disable() at "usb_gadget.h" for details
+ */
+static int ep_disable(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int direction, retval = 0;
+ unsigned long flags;
+
+ if (ep == NULL)
+ return -EINVAL;
+ else if (mEp->ep.desc == NULL)
+ return -EBUSY;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ /* only internal SW should disable ctrl endpts */
+
+ direction = mEp->dir;
+ do {
+ dbg_event(_usb_addr(mEp), "DISABLE", 0);
+
+ retval |= _ep_nuke(mEp);
+ retval |= hw_ep_disable(mEp->udc, mEp->num, mEp->dir);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ } while (mEp->dir != direction);
+
+ mEp->ep.desc = NULL;
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_alloc_request: allocate a request object to use with this endpoint
+ *
+ * Check usb_ep_alloc_request() at "usb_gadget.h" for details
+ */
+static struct usb_request *ep_alloc_request(struct usb_ep *ep, gfp_t gfp_flags)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = NULL;
+
+ if (ep == NULL)
+ return NULL;
+
+ mReq = kzalloc(sizeof(struct ci13xxx_req), gfp_flags);
+ if (mReq != NULL) {
+ INIT_LIST_HEAD(&mReq->queue);
+ mReq->req.dma = DMA_ADDR_INVALID;
+
+ mReq->ptr = dma_pool_alloc(mEp->td_pool, gfp_flags,
+ &mReq->dma);
+ if (mReq->ptr == NULL) {
+ kfree(mReq);
+ mReq = NULL;
+ }
+ }
+
+ dbg_event(_usb_addr(mEp), "ALLOC", mReq == NULL);
+
+ return (mReq == NULL) ? NULL : &mReq->req;
+}
+
+/**
+ * ep_free_request: frees a request object
+ *
+ * Check usb_ep_free_request() at "usb_gadget.h" for details
+ */
+static void ep_free_request(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ unsigned long flags;
+
+ if (ep == NULL || req == NULL) {
+ return;
+ } else if (!list_empty(&mReq->queue)) {
+ dev_err(mEp->udc->dev, "freeing queued request\n");
+ return;
+ }
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ if (mReq->ptr)
+ dma_pool_free(mEp->td_pool, mReq->ptr, mReq->dma);
+ kfree(mReq);
+
+ dbg_event(_usb_addr(mEp), "FREE", 0);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+}
+
+/**
+ * ep_queue: queues (submits) an I/O request to an endpoint
+ *
+ * Check usb_ep_queue()* at usb_gadget.h" for details
+ */
+static int ep_queue(struct usb_ep *ep, struct usb_request *req,
+ gfp_t __maybe_unused gfp_flags)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ struct ci13xxx *udc = mEp->udc;
+ int retval = 0;
+ unsigned long flags;
+
+ if (ep == NULL || req == NULL || mEp->ep.desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL) {
+ if (req->length)
+ mEp = (udc->ep0_dir == RX) ?
+ udc->ep0out : udc->ep0in;
+ if (!list_empty(&mEp->qh.queue)) {
+ _ep_nuke(mEp);
+ retval = -EOVERFLOW;
+ dev_warn(mEp->udc->dev, "endpoint ctrl %X nuked\n",
+ _usb_addr(mEp));
+ }
+ }
+
+ /* first nuke then test link, e.g. previous status has not sent */
+ if (!list_empty(&mReq->queue)) {
+ retval = -EBUSY;
+ dev_err(mEp->udc->dev, "request already in queue\n");
+ goto done;
+ }
+
+ if (req->length > 4 * CI13XXX_PAGE_SIZE) {
+ req->length = 4 * CI13XXX_PAGE_SIZE;
+ retval = -EMSGSIZE;
+ dev_warn(mEp->udc->dev, "request length truncated\n");
+ }
+
+ dbg_queue(_usb_addr(mEp), req, retval);
+
+ /* push request */
+ mReq->req.status = -EINPROGRESS;
+ mReq->req.actual = 0;
+
+ retval = _hardware_enqueue(mEp, mReq);
+
+ if (retval == -EALREADY) {
+ dbg_event(_usb_addr(mEp), "QUEUE", retval);
+ retval = 0;
+ }
+ if (!retval)
+ list_add_tail(&mReq->queue, &mEp->qh.queue);
+
+ done:
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_dequeue: dequeues (cancels, unlinks) an I/O request from an endpoint
+ *
+ * Check usb_ep_dequeue() at "usb_gadget.h" for details
+ */
+static int ep_dequeue(struct usb_ep *ep, struct usb_request *req)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ struct ci13xxx_req *mReq = container_of(req, struct ci13xxx_req, req);
+ unsigned long flags;
+
+ if (ep == NULL || req == NULL || mReq->req.status != -EALREADY ||
+ mEp->ep.desc == NULL || list_empty(&mReq->queue) ||
+ list_empty(&mEp->qh.queue))
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "DEQUEUE", 0);
+
+ hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
+
+ /* pop request */
+ list_del_init(&mReq->queue);
+ if (mReq->map) {
+ dma_unmap_single(mEp->device, mReq->req.dma, mReq->req.length,
+ mEp->dir ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
+ mReq->req.dma = DMA_ADDR_INVALID;
+ mReq->map = 0;
+ }
+ req->status = -ECONNRESET;
+
+ if (mReq->req.complete != NULL) {
+ spin_unlock(mEp->lock);
+ mReq->req.complete(&mEp->ep, &mReq->req);
+ spin_lock(mEp->lock);
+ }
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return 0;
+}
+
+/**
+ * ep_set_halt: sets the endpoint halt feature
+ *
+ * Check usb_ep_set_halt() at "usb_gadget.h" for details
+ */
+static int ep_set_halt(struct usb_ep *ep, int value)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ int direction, retval = 0;
+ unsigned long flags;
+
+ if (ep == NULL || mEp->ep.desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+#ifndef STALL_IN
+ /* g_file_storage MS compliant but g_zero fails chapter 9 compliance */
+ if (value && mEp->type == USB_ENDPOINT_XFER_BULK && mEp->dir == TX &&
+ !list_empty(&mEp->qh.queue)) {
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return -EAGAIN;
+ }
+#endif
+
+ direction = mEp->dir;
+ do {
+ dbg_event(_usb_addr(mEp), "HALT", value);
+ retval |= hw_ep_set_halt(mEp->udc, mEp->num, mEp->dir, value);
+
+ if (!value)
+ mEp->wedge = 0;
+
+ if (mEp->type == USB_ENDPOINT_XFER_CONTROL)
+ mEp->dir = (mEp->dir == TX) ? RX : TX;
+
+ } while (mEp->dir != direction);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+ return retval;
+}
+
+/**
+ * ep_set_wedge: sets the halt feature and ignores clear requests
+ *
+ * Check usb_ep_set_wedge() at "usb_gadget.h" for details
+ */
+static int ep_set_wedge(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ unsigned long flags;
+
+ if (ep == NULL || mEp->ep.desc == NULL)
+ return -EINVAL;
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "WEDGE", 0);
+ mEp->wedge = 1;
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+
+ return usb_ep_set_halt(ep);
+}
+
+/**
+ * ep_fifo_flush: flushes contents of a fifo
+ *
+ * Check usb_ep_fifo_flush() at "usb_gadget.h" for details
+ */
+static void ep_fifo_flush(struct usb_ep *ep)
+{
+ struct ci13xxx_ep *mEp = container_of(ep, struct ci13xxx_ep, ep);
+ unsigned long flags;
+
+ if (ep == NULL) {
+ dev_err(mEp->udc->dev, "%02X: -EINVAL\n", _usb_addr(mEp));
+ return;
+ }
+
+ spin_lock_irqsave(mEp->lock, flags);
+
+ dbg_event(_usb_addr(mEp), "FFLUSH", 0);
+ hw_ep_flush(mEp->udc, mEp->num, mEp->dir);
+
+ spin_unlock_irqrestore(mEp->lock, flags);
+}
+
+/**
+ * Endpoint-specific part of the API to the USB controller hardware
+ * Check "usb_gadget.h" for details
+ */
+static const struct usb_ep_ops usb_ep_ops = {
+ .enable = ep_enable,
+ .disable = ep_disable,
+ .alloc_request = ep_alloc_request,
+ .free_request = ep_free_request,
+ .queue = ep_queue,
+ .dequeue = ep_dequeue,
+ .set_halt = ep_set_halt,
+ .set_wedge = ep_set_wedge,
+ .fifo_flush = ep_fifo_flush,
+};
+
+/******************************************************************************
+ * GADGET block
+ *****************************************************************************/
+static int ci13xxx_vbus_session(struct usb_gadget *_gadget, int is_active)
+{
+ struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+ int gadget_ready = 0;
+
+ if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS))
+ return -EOPNOTSUPP;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ udc->vbus_active = is_active;
+ if (udc->driver)
+ gadget_ready = 1;
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ if (gadget_ready) {
+ if (is_active) {
+ pm_runtime_get_sync(&_gadget->dev);
+ hw_device_reset(udc);
+ hw_device_state(udc, udc->ep0out->qh.dma);
+ } else {
+ hw_device_state(udc, 0);
+ if (udc->udc_driver->notify_event)
+ udc->udc_driver->notify_event(udc,
+ CI13XXX_CONTROLLER_STOPPED_EVENT);
+ _gadget_stop_activity(&udc->gadget);
+ pm_runtime_put_sync(&_gadget->dev);
+ }
+ }
+
+ return 0;
+}
+
+static int ci13xxx_wakeup(struct usb_gadget *_gadget)
+{
+ struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+ int ret = 0;
+
+ spin_lock_irqsave(&udc->lock, flags);
+ if (!udc->remote_wakeup) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+ if (!hw_read(udc, OP_PORTSC, PORTSC_SUSP)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ hw_write(udc, OP_PORTSC, PORTSC_FPR, PORTSC_FPR);
+out:
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return ret;
+}
+
+static int ci13xxx_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
+{
+ struct ci13xxx *udc = container_of(_gadget, struct ci13xxx, gadget);
+
+ if (udc->transceiver)
+ return usb_phy_set_power(udc->transceiver, mA);
+ return -ENOTSUPP;
+}
+
+static int ci13xxx_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver);
+static int ci13xxx_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver);
+/**
+ * Device operations part of the API to the USB controller hardware,
+ * which don't involve endpoints (or i/o)
+ * Check "usb_gadget.h" for details
+ */
+static const struct usb_gadget_ops usb_gadget_ops = {
+ .vbus_session = ci13xxx_vbus_session,
+ .wakeup = ci13xxx_wakeup,
+ .vbus_draw = ci13xxx_vbus_draw,
+ .udc_start = ci13xxx_start,
+ .udc_stop = ci13xxx_stop,
+};
+
+static int init_eps(struct ci13xxx *udc)
+{
+ int retval = 0, i, j;
+
+ for (i = 0; i < udc->hw_ep_max/2; i++)
+ for (j = RX; j <= TX; j++) {
+ int k = i + j * udc->hw_ep_max/2;
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[k];
+
+ scnprintf(mEp->name, sizeof(mEp->name), "ep%i%s", i,
+ (j == TX) ? "in" : "out");
+
+ mEp->udc = udc;
+ mEp->lock = &udc->lock;
+ mEp->device = &udc->gadget.dev;
+ mEp->td_pool = udc->td_pool;
+
+ mEp->ep.name = mEp->name;
+ mEp->ep.ops = &usb_ep_ops;
+ mEp->ep.maxpacket = CTRL_PAYLOAD_MAX;
+
+ INIT_LIST_HEAD(&mEp->qh.queue);
+ mEp->qh.ptr = dma_pool_alloc(udc->qh_pool, GFP_KERNEL,
+ &mEp->qh.dma);
+ if (mEp->qh.ptr == NULL)
+ retval = -ENOMEM;
+ else
+ memset(mEp->qh.ptr, 0, sizeof(*mEp->qh.ptr));
+
+ /*
+ * set up shorthands for ep0 out and in endpoints,
+ * don't add to gadget's ep_list
+ */
+ if (i == 0) {
+ if (j == RX)
+ udc->ep0out = mEp;
+ else
+ udc->ep0in = mEp;
+
+ continue;
+ }
+
+ list_add_tail(&mEp->ep.ep_list, &udc->gadget.ep_list);
+ }
+
+ return retval;
+}
+
+/**
+ * ci13xxx_start: register a gadget driver
+ * @gadget: our gadget
+ * @driver: the driver being registered
+ *
+ * Interrupts are enabled here.
+ */
+static int ci13xxx_start(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+ int retval = -ENOMEM;
+
+ if (driver->disconnect == NULL)
+ return -EINVAL;
+
+
+ udc->ep0out->ep.desc = &ctrl_endpt_out_desc;
+ retval = usb_ep_enable(&udc->ep0out->ep);
+ if (retval)
+ return retval;
+
+ udc->ep0in->ep.desc = &ctrl_endpt_in_desc;
+ retval = usb_ep_enable(&udc->ep0in->ep);
+ if (retval)
+ return retval;
+ spin_lock_irqsave(&udc->lock, flags);
+
+ udc->driver = driver;
+ pm_runtime_get_sync(&udc->gadget.dev);
+ if (udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) {
+ if (udc->vbus_active) {
+ if (udc->udc_driver->flags & CI13XXX_REGS_SHARED)
+ hw_device_reset(udc);
+ } else {
+ pm_runtime_put_sync(&udc->gadget.dev);
+ goto done;
+ }
+ }
+
+ retval = hw_device_state(udc, udc->ep0out->qh.dma);
+ if (retval)
+ pm_runtime_put_sync(&udc->gadget.dev);
+
+ done:
+ spin_unlock_irqrestore(&udc->lock, flags);
+ return retval;
+}
+
+/**
+ * ci13xxx_stop: unregister a gadget driver
+ */
+static int ci13xxx_stop(struct usb_gadget *gadget,
+ struct usb_gadget_driver *driver)
+{
+ struct ci13xxx *udc = container_of(gadget, struct ci13xxx, gadget);
+ unsigned long flags;
+
+ spin_lock_irqsave(&udc->lock, flags);
+
+ if (!(udc->udc_driver->flags & CI13XXX_PULLUP_ON_VBUS) ||
+ udc->vbus_active) {
+ hw_device_state(udc, 0);
+ if (udc->udc_driver->notify_event)
+ udc->udc_driver->notify_event(udc,
+ CI13XXX_CONTROLLER_STOPPED_EVENT);
+ udc->driver = NULL;
+ spin_unlock_irqrestore(&udc->lock, flags);
+ _gadget_stop_activity(&udc->gadget);
+ spin_lock_irqsave(&udc->lock, flags);
+ pm_runtime_put(&udc->gadget.dev);
+ }
+
+ spin_unlock_irqrestore(&udc->lock, flags);
+
+ return 0;
+}
+
+/******************************************************************************
+ * BUS block
+ *****************************************************************************/
+/**
+ * udc_irq: global interrupt handler
+ *
+ * This function returns IRQ_HANDLED if the IRQ has been handled
+ * It locks access to registers
+ */
+irqreturn_t udc_irq(int irq, void *data)
+{
+ struct ci13xxx *udc = data;
+ irqreturn_t retval;
+ u32 intr;
+
+ if (udc == NULL)
+ return IRQ_HANDLED;
+
+ spin_lock(&udc->lock);
+
+ if (udc->udc_driver->flags & CI13XXX_REGS_SHARED) {
+ if (hw_read(udc, OP_USBMODE, USBMODE_CM) !=
+ USBMODE_CM_DEVICE) {
+ spin_unlock(&udc->lock);
+ return IRQ_NONE;
+ }
+ }
+ intr = hw_test_and_clear_intr_active(udc);
+ dbg_interrupt(intr);
+
+ if (intr) {
+ /* order defines priority - do NOT change it */
+ if (USBi_URI & intr)
+ isr_reset_handler(udc);
+
+ if (USBi_PCI & intr) {
+ udc->gadget.speed = hw_port_is_high_speed(udc) ?
+ USB_SPEED_HIGH : USB_SPEED_FULL;
+ if (udc->suspended && udc->driver->resume) {
+ spin_unlock(&udc->lock);
+ udc->driver->resume(&udc->gadget);
+ spin_lock(&udc->lock);
+ udc->suspended = 0;
+ }
+ }
+
+ if (USBi_UI & intr)
+ isr_tr_complete_handler(udc);
+
+ if (USBi_SLI & intr) {
+ if (udc->gadget.speed != USB_SPEED_UNKNOWN &&
+ udc->driver->suspend) {
+ udc->suspended = 1;
+ spin_unlock(&udc->lock);
+ udc->driver->suspend(&udc->gadget);
+ spin_lock(&udc->lock);
+ }
+ }
+ retval = IRQ_HANDLED;
+ } else {
+ retval = IRQ_NONE;
+ }
+ spin_unlock(&udc->lock);
+
+ return retval;
+}
+
+/**
+ * udc_release: driver release function
+ * @dev: device
+ *
+ * Currently does nothing
+ */
+static void udc_release(struct device *dev)
+{
+}
+
+/**
+ * udc_probe: parent probe must call this to initialize UDC
+ * @dev: parent device
+ * @regs: registers base address
+ * @name: driver name
+ *
+ * This function returns an error code
+ * No interrupts active, the IRQ has not been requested yet
+ * Kernel assumes 32-bit DMA operations by default, no need to dma_set_mask
+ */
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc)
+{
+ struct ci13xxx *udc;
+ int retval = 0;
+
+ if (dev == NULL || regs == NULL || driver == NULL ||
+ driver->name == NULL)
+ return -EINVAL;
+
+ udc = kzalloc(sizeof(struct ci13xxx), GFP_KERNEL);
+ if (udc == NULL)
+ return -ENOMEM;
+
+ spin_lock_init(&udc->lock);
+ udc->regs = regs;
+ udc->udc_driver = driver;
+
+ udc->gadget.ops = &usb_gadget_ops;
+ udc->gadget.speed = USB_SPEED_UNKNOWN;
+ udc->gadget.max_speed = USB_SPEED_HIGH;
+ udc->gadget.is_otg = 0;
+ udc->gadget.name = driver->name;
+
+ INIT_LIST_HEAD(&udc->gadget.ep_list);
+
+ dev_set_name(&udc->gadget.dev, "gadget");
+ udc->gadget.dev.dma_mask = dev->dma_mask;
+ udc->gadget.dev.coherent_dma_mask = dev->coherent_dma_mask;
+ udc->gadget.dev.parent = dev;
+ udc->gadget.dev.release = udc_release;
+
+ udc->dev = dev;
+
+ /* alloc resources */
+ udc->qh_pool = dma_pool_create("ci13xxx_qh", dev,
+ sizeof(struct ci13xxx_qh),
+ 64, CI13XXX_PAGE_SIZE);
+ if (udc->qh_pool == NULL) {
+ retval = -ENOMEM;
+ goto free_udc;
+ }
+
+ udc->td_pool = dma_pool_create("ci13xxx_td", dev,
+ sizeof(struct ci13xxx_td),
+ 64, CI13XXX_PAGE_SIZE);
+ if (udc->td_pool == NULL) {
+ retval = -ENOMEM;
+ goto free_qh_pool;
+ }
+
+ retval = hw_device_init(udc, regs, driver->capoffset);
+ if (retval < 0)
+ goto free_pools;
+
+ retval = init_eps(udc);
+ if (retval)
+ goto free_pools;
+
+ udc->gadget.ep0 = &udc->ep0in->ep;
+
+ udc->transceiver = usb_get_transceiver();
+
+ if (udc->udc_driver->flags & CI13XXX_REQUIRE_TRANSCEIVER) {
+ if (udc->transceiver == NULL) {
+ retval = -ENODEV;
+ goto free_pools;
+ }
+ }
+
+ if (!(udc->udc_driver->flags & CI13XXX_REGS_SHARED)) {
+ retval = hw_device_reset(udc);
+ if (retval)
+ goto put_transceiver;
+ }
+
+ retval = device_register(&udc->gadget.dev);
+ if (retval) {
+ put_device(&udc->gadget.dev);
+ goto put_transceiver;
+ }
+
+ retval = dbg_create_files(&udc->gadget.dev);
+ if (retval)
+ goto unreg_device;
+
+ if (udc->transceiver) {
+ retval = otg_set_peripheral(udc->transceiver->otg,
+ &udc->gadget);
+ if (retval)
+ goto remove_dbg;
+ }
+
+ retval = usb_add_gadget_udc(dev, &udc->gadget);
+ if (retval)
+ goto remove_trans;
+
+ pm_runtime_no_callbacks(&udc->gadget.dev);
+ pm_runtime_enable(&udc->gadget.dev);
+
+ *_udc = udc;
+ return retval;
+
+remove_trans:
+ if (udc->transceiver) {
+ otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
+ usb_put_transceiver(udc->transceiver);
+ }
+
+ dev_err(dev, "error = %i\n", retval);
+remove_dbg:
+ dbg_remove_files(&udc->gadget.dev);
+unreg_device:
+ device_unregister(&udc->gadget.dev);
+put_transceiver:
+ if (udc->transceiver)
+ usb_put_transceiver(udc->transceiver);
+free_pools:
+ dma_pool_destroy(udc->td_pool);
+free_qh_pool:
+ dma_pool_destroy(udc->qh_pool);
+free_udc:
+ kfree(udc);
+ *_udc = NULL;
+ return retval;
+}
+
+/**
+ * udc_remove: parent remove must call this to remove UDC
+ *
+ * No interrupts active, the IRQ has been released
+ */
+void udc_remove(struct ci13xxx *udc)
+{
+ int i;
+
+ if (udc == NULL)
+ return;
+
+ usb_del_gadget_udc(&udc->gadget);
+
+ for (i = 0; i < udc->hw_ep_max; i++) {
+ struct ci13xxx_ep *mEp = &udc->ci13xxx_ep[i];
+
+ dma_pool_free(udc->qh_pool, mEp->qh.ptr, mEp->qh.dma);
+ }
+
+ dma_pool_destroy(udc->td_pool);
+ dma_pool_destroy(udc->qh_pool);
+
+ if (udc->transceiver) {
+ otg_set_peripheral(udc->transceiver->otg, &udc->gadget);
+ usb_put_transceiver(udc->transceiver);
+ }
+ dbg_remove_files(&udc->gadget.dev);
+ device_unregister(&udc->gadget.dev);
+
+ kfree(udc->hw_bank.regmap);
+ kfree(udc);
+}
--- /dev/null
+/*
+ * udc.h - ChipIdea UDC structures
+ *
+ * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
+ *
+ * Author: David Lopo
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __DRIVERS_USB_CHIPIDEA_UDC_H
+#define __DRIVERS_USB_CHIPIDEA_UDC_H
+
+#include <linux/list.h>
+
+#define CTRL_PAYLOAD_MAX 64
+#define RX 0 /* similar to USB_DIR_OUT but can be used as an index */
+#define TX 1 /* similar to USB_DIR_IN but can be used as an index */
+
+/* DMA layout of transfer descriptors */
+struct ci13xxx_td {
+ /* 0 */
+ u32 next;
+#define TD_TERMINATE BIT(0)
+#define TD_ADDR_MASK (0xFFFFFFEUL << 5)
+ /* 1 */
+ u32 token;
+#define TD_STATUS (0x00FFUL << 0)
+#define TD_STATUS_TR_ERR BIT(3)
+#define TD_STATUS_DT_ERR BIT(5)
+#define TD_STATUS_HALTED BIT(6)
+#define TD_STATUS_ACTIVE BIT(7)
+#define TD_MULTO (0x0003UL << 10)
+#define TD_IOC BIT(15)
+#define TD_TOTAL_BYTES (0x7FFFUL << 16)
+ /* 2 */
+ u32 page[5];
+#define TD_CURR_OFFSET (0x0FFFUL << 0)
+#define TD_FRAME_NUM (0x07FFUL << 0)
+#define TD_RESERVED_MASK (0x0FFFUL << 0)
+} __attribute__ ((packed));
+
+/* DMA layout of queue heads */
+struct ci13xxx_qh {
+ /* 0 */
+ u32 cap;
+#define QH_IOS BIT(15)
+#define QH_MAX_PKT (0x07FFUL << 16)
+#define QH_ZLT BIT(29)
+#define QH_MULT (0x0003UL << 30)
+ /* 1 */
+ u32 curr;
+ /* 2 - 8 */
+ struct ci13xxx_td td;
+ /* 9 */
+ u32 RESERVED;
+ struct usb_ctrlrequest setup;
+} __attribute__ ((packed));
+
+/* Extension of usb_request */
+struct ci13xxx_req {
+ struct usb_request req;
+ unsigned map;
+ struct list_head queue;
+ struct ci13xxx_td *ptr;
+ dma_addr_t dma;
+ struct ci13xxx_td *zptr;
+ dma_addr_t zdma;
+};
+
+#ifdef CONFIG_USB_CHIPIDEA_UDC
+irqreturn_t udc_irq(int irq, void *data);
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc);
+void udc_remove(struct ci13xxx *udc);
+#else
+static inline irqreturn_t udc_irq(int irq, void *data)
+{
+ return IRQ_NONE;
+}
+
+static inline
+int udc_probe(struct ci13xxx_udc_driver *driver, struct device *dev,
+ void __iomem *regs, struct ci13xxx **_udc)
+{
+ return -ENODEV;
+}
+
+static inline void udc_remove(struct ci13xxx *udc)
+{
+}
+#endif
+
+#endif /* __DRIVERS_USB_CHIPIDEA_UDC_H */
--- /dev/null
+/*
+ * Platform data for the chipidea USB dual role controller
+ */
+
+#ifndef __LINUX_USB_CHIPIDEA_H
+#define __LINUX_USB_CHIPIDEA_H
+
+struct ci13xxx;
+struct ci13xxx_udc_driver {
+ const char *name;
+ /* offset of the capability registers */
+ uintptr_t capoffset;
+ unsigned long flags;
+#define CI13XXX_REGS_SHARED BIT(0)
+#define CI13XXX_REQUIRE_TRANSCEIVER BIT(1)
+#define CI13XXX_PULLUP_ON_VBUS BIT(2)
+#define CI13XXX_DISABLE_STREAMING BIT(3)
+
+#define CI13XXX_CONTROLLER_RESET_EVENT 0
+#define CI13XXX_CONTROLLER_STOPPED_EVENT 1
+ void (*notify_event) (struct ci13xxx *udc, unsigned event);
+};
+
+/* Default offset of capability registers */
+#define DEF_CAPOFFSET 0x100
+
+#endif
projects / GitHub / LineageOS / android_kernel_motorola_exynos9610.git / commitdiff