--- /dev/null
+/*
+ * Remote VUB300 SDIO/SDmem Host Controller Driver
+ *
+ * Copyright (C) 2010 Elan Digital Systems Limited
+ *
+ * based on USB Skeleton driver - 2.2
+ *
+ * Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2
+ *
+ * VUB300: is a USB 2.0 client device with a single SDIO/SDmem/MMC slot
+ * Any SDIO/SDmem/MMC device plugged into the VUB300 will appear,
+ * by virtue of this driver, to have been plugged into a local
+ * SDIO host controller, similar to, say, a PCI Ricoh controller
+ * This is because this kernel device driver is both a USB 2.0
+ * client device driver AND an MMC host controller driver. Thus
+ * if there is an existing driver for the inserted SDIO/SDmem/MMC
+ * device then that driver will be used by the kernel to manage
+ * the device in exactly the same fashion as if it had been
+ * directly plugged into, say, a local pci bus Ricoh controller
+ *
+ * RANT: this driver was written using a display 128x48 - converting it
+ * to a line width of 80 makes it very difficult to support. In
+ * particular functions have been broken down into sub functions
+ * and the original meaningful names have been shortened into
+ * cryptic ones.
+ * The problem is that executing a fragment of code subject to
+ * two conditions means an indentation of 24, thus leaving only
+ * 56 characters for a C statement. And that is quite ridiculous!
+ *
+ * Data types: data passed to/from the VUB300 is fixed to a number of
+ * bits and driver data fields reflect that limit by using
+ * u8, u16, u32
+ */
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/kref.h>
+#include <linux/uaccess.h>
+#include <linux/usb.h>
+#include <linux/mutex.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio_func.h>
+#include <linux/mmc/sdio_ids.h>
+#include <linux/workqueue.h>
+#include <linux/ctype.h>
+#include <linux/firmware.h>
+#include <linux/scatterlist.h>
+
+struct host_controller_info {
+ u8 info_size;
+ u16 firmware_version;
+ u8 number_of_ports;
+} __packed;
+
+#define FIRMWARE_BLOCK_BOUNDARY 1024
+struct sd_command_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u8 command_type; /* Bit7 - Rd/Wr */
+ u8 command_index;
+ u8 transfer_size[4]; /* ReadSize + ReadSize */
+ u8 response_type;
+ u8 arguments[4];
+ u8 block_count[2];
+ u8 block_size[2];
+ u8 block_boundary[2];
+ u8 reserved[44]; /* to pad out to 64 bytes */
+} __packed;
+
+struct sd_irqpoll_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u8 command_type; /* Bit7 - Rd/Wr */
+ u8 padding[16]; /* don't ask why !! */
+ u8 poll_timeout_msb;
+ u8 poll_timeout_lsb;
+ u8 reserved[42]; /* to pad out to 64 bytes */
+} __packed;
+
+struct sd_common_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+} __packed;
+
+struct sd_response_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u8 command_type;
+ u8 command_index;
+ u8 command_response[0];
+} __packed;
+
+struct sd_status_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u16 port_flags;
+ u32 sdio_clock;
+ u16 host_header_size;
+ u16 func_header_size;
+ u16 ctrl_header_size;
+} __packed;
+
+struct sd_error_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u8 error_code;
+} __packed;
+
+struct sd_interrupt_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+} __packed;
+
+struct offload_registers_access {
+ u8 command_byte[4];
+ u8 Respond_Byte[4];
+} __packed;
+
+#define INTERRUPT_REGISTER_ACCESSES 15
+struct sd_offloaded_interrupt {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ struct offload_registers_access reg[INTERRUPT_REGISTER_ACCESSES];
+} __packed;
+
+struct sd_register_header {
+ u8 header_size;
+ u8 header_type;
+ u8 port_number;
+ u8 command_type;
+ u8 command_index;
+ u8 command_response[6];
+} __packed;
+
+#define PIGGYBACK_REGISTER_ACCESSES 14
+struct sd_offloaded_piggyback {
+ struct sd_register_header sdio;
+ struct offload_registers_access reg[PIGGYBACK_REGISTER_ACCESSES];
+} __packed;
+
+union sd_response {
+ struct sd_common_header common;
+ struct sd_status_header status;
+ struct sd_error_header error;
+ struct sd_interrupt_header interrupt;
+ struct sd_response_header response;
+ struct sd_offloaded_interrupt irq;
+ struct sd_offloaded_piggyback pig;
+} __packed;
+
+union sd_command {
+ struct sd_command_header head;
+ struct sd_irqpoll_header poll;
+} __packed;
+
+enum SD_RESPONSE_TYPE {
+ SDRT_UNSPECIFIED = 0,
+ SDRT_NONE,
+ SDRT_1,
+ SDRT_1B,
+ SDRT_2,
+ SDRT_3,
+ SDRT_4,
+ SDRT_5,
+ SDRT_5B,
+ SDRT_6,
+ SDRT_7,
+};
+
+#define RESPONSE_INTERRUPT 0x01
+#define RESPONSE_ERROR 0x02
+#define RESPONSE_STATUS 0x03
+#define RESPONSE_IRQ_DISABLED 0x05
+#define RESPONSE_IRQ_ENABLED 0x06
+#define RESPONSE_PIGGYBACKED 0x07
+#define RESPONSE_NO_INTERRUPT 0x08
+#define RESPONSE_PIG_DISABLED 0x09
+#define RESPONSE_PIG_ENABLED 0x0A
+#define SD_ERROR_1BIT_TIMEOUT 0x01
+#define SD_ERROR_4BIT_TIMEOUT 0x02
+#define SD_ERROR_1BIT_CRC_WRONG 0x03
+#define SD_ERROR_4BIT_CRC_WRONG 0x04
+#define SD_ERROR_1BIT_CRC_ERROR 0x05
+#define SD_ERROR_4BIT_CRC_ERROR 0x06
+#define SD_ERROR_NO_CMD_ENDBIT 0x07
+#define SD_ERROR_NO_1BIT_DATEND 0x08
+#define SD_ERROR_NO_4BIT_DATEND 0x09
+#define SD_ERROR_1BIT_UNEXPECTED_TIMEOUT 0x0A
+#define SD_ERROR_4BIT_UNEXPECTED_TIMEOUT 0x0B
+#define SD_ERROR_ILLEGAL_COMMAND 0x0C
+#define SD_ERROR_NO_DEVICE 0x0D
+#define SD_ERROR_TRANSFER_LENGTH 0x0E
+#define SD_ERROR_1BIT_DATA_TIMEOUT 0x0F
+#define SD_ERROR_4BIT_DATA_TIMEOUT 0x10
+#define SD_ERROR_ILLEGAL_STATE 0x11
+#define SD_ERROR_UNKNOWN_ERROR 0x12
+#define SD_ERROR_RESERVED_ERROR 0x13
+#define SD_ERROR_INVALID_FUNCTION 0x14
+#define SD_ERROR_OUT_OF_RANGE 0x15
+#define SD_ERROR_STAT_CMD 0x16
+#define SD_ERROR_STAT_DATA 0x17
+#define SD_ERROR_STAT_CMD_TIMEOUT 0x18
+#define SD_ERROR_SDCRDY_STUCK 0x19
+#define SD_ERROR_UNHANDLED 0x1A
+#define SD_ERROR_OVERRUN 0x1B
+#define SD_ERROR_PIO_TIMEOUT 0x1C
+
+#define FUN(c) (0x000007 & (c->arg>>28))
+#define REG(c) (0x01FFFF & (c->arg>>9))
+
+static int limit_speed_to_24_MHz;
+module_param(limit_speed_to_24_MHz, bool, 0644);
+MODULE_PARM_DESC(limit_speed_to_24_MHz, "Limit Max SDIO Clock Speed to 24 MHz");
+
+static int pad_input_to_usb_pkt;
+module_param(pad_input_to_usb_pkt, bool, 0644);
+MODULE_PARM_DESC(pad_input_to_usb_pkt,
+ "Pad USB data input transfers to whole USB Packet");
+
+static int disable_offload_processing;
+module_param(disable_offload_processing, bool, 0644);
+MODULE_PARM_DESC(disable_offload_processing, "Disable Offload Processing");
+
+static int force_1_bit_data_xfers;
+module_param(force_1_bit_data_xfers, bool, 0644);
+MODULE_PARM_DESC(force_1_bit_data_xfers,
+ "Force SDIO Data Transfers to 1-bit Mode");
+
+static int force_polling_for_irqs;
+module_param(force_polling_for_irqs, bool, 0644);
+MODULE_PARM_DESC(force_polling_for_irqs, "Force Polling for SDIO interrupts");
+
+static int firmware_irqpoll_timeout = 1024;
+module_param(firmware_irqpoll_timeout, int, 0644);
+MODULE_PARM_DESC(firmware_irqpoll_timeout, "VUB300 firmware irqpoll timeout");
+
+static int force_max_req_size = 128;
+module_param(force_max_req_size, int, 0644);
+MODULE_PARM_DESC(force_max_req_size, "set max request size in kBytes");
+
+#ifdef SMSC_DEVELOPMENT_BOARD
+static int firmware_rom_wait_states = 0x04;
+#else
+static int firmware_rom_wait_states = 0x1C;
+#endif
+
+module_param(firmware_rom_wait_states, bool, 0644);
+MODULE_PARM_DESC(firmware_rom_wait_states,
+ "ROM wait states byte=RRRIIEEE (Reserved Internal External)");
+
+#define ELAN_VENDOR_ID 0x2201
+#define VUB300_VENDOR_ID 0x0424
+#define VUB300_PRODUCT_ID 0x012C
+static struct usb_device_id vub300_table[] = {
+ {USB_DEVICE(ELAN_VENDOR_ID, VUB300_PRODUCT_ID)},
+ {USB_DEVICE(VUB300_VENDOR_ID, VUB300_PRODUCT_ID)},
+ {} /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, vub300_table);
+
+static struct workqueue_struct *cmndworkqueue;
+static struct workqueue_struct *pollworkqueue;
+static struct workqueue_struct *deadworkqueue;
+
+static inline int interface_to_InterfaceNumber(struct usb_interface *interface)
+{
+ if (!interface)
+ return -1;
+ if (!interface->cur_altsetting)
+ return -1;
+ return interface->cur_altsetting->desc.bInterfaceNumber;
+}
+
+struct sdio_register {
+ unsigned func_num:3;
+ unsigned sdio_reg:17;
+ unsigned activate:1;
+ unsigned prepared:1;
+ unsigned regvalue:8;
+ unsigned response:8;
+ unsigned sparebit:26;
+};
+
+struct vub300_mmc_host {
+ struct usb_device *udev;
+ struct usb_interface *interface;
+ struct kref kref;
+ struct mutex cmd_mutex;
+ struct mutex irq_mutex;
+ char vub_name[3 + (9 * 8) + 4 + 1]; /* max of 7 sdio fn's */
+ u8 cmnd_out_ep; /* EndPoint for commands */
+ u8 cmnd_res_ep; /* EndPoint for responses */
+ u8 data_out_ep; /* EndPoint for out data */
+ u8 data_inp_ep; /* EndPoint for inp data */
+ bool card_powered;
+ bool card_present;
+ bool read_only;
+ bool large_usb_packets;
+ bool app_spec; /* ApplicationSpecific */
+ bool irq_enabled; /* by the MMC CORE */
+ bool irq_disabled; /* in the firmware */
+ unsigned bus_width:4;
+ u8 total_offload_count;
+ u8 dynamic_register_count;
+ u8 resp_len;
+ u32 datasize;
+ int errors;
+ int usb_transport_fail;
+ int usb_timed_out;
+ int irqs_queued;
+ struct sdio_register sdio_register[16];
+ struct offload_interrupt_function_register {
+#define MAXREGBITS 4
+#define MAXREGS (1<<MAXREGBITS)
+#define MAXREGMASK (MAXREGS-1)
+ u8 offload_count;
+ u32 offload_point;
+ struct offload_registers_access reg[MAXREGS];
+ } fn[8];
+ u16 fbs[8]; /* Function Block Size */
+ struct mmc_command *cmd;
+ struct mmc_request *req;
+ struct mmc_data *data;
+ struct mmc_host *mmc;
+ struct urb *urb;
+ struct urb *command_out_urb;
+ struct urb *command_res_urb;
+ struct completion command_complete;
+ struct completion irqpoll_complete;
+ union sd_command cmnd;
+ union sd_response resp;
+ struct timer_list sg_transfer_timer;
+ struct usb_sg_request sg_request;
+ struct timer_list inactivity_timer;
+ struct work_struct deadwork;
+ struct work_struct cmndwork;
+ struct delayed_work pollwork;
+ struct host_controller_info hc_info;
+ struct sd_status_header system_port_status;
+ u8 padded_buffer[64];
+};
+
+#define kref_to_vub300_mmc_host(d) container_of(d, struct vub300_mmc_host, kref)
+#define SET_TRANSFER_PSEUDOCODE 21
+#define SET_INTERRUPT_PSEUDOCODE 20
+#define SET_FAILURE_MODE 18
+#define SET_ROM_WAIT_STATES 16
+#define SET_IRQ_ENABLE 13
+#define SET_CLOCK_SPEED 11
+#define SET_FUNCTION_BLOCK_SIZE 9
+#define SET_SD_DATA_MODE 6
+#define SET_SD_POWER 4
+#define ENTER_DFU_MODE 3
+#define GET_HC_INF0 1
+#define GET_SYSTEM_PORT_STATUS 0
+
+static void vub300_delete(struct kref *kref)
+{ /* kref callback - softirq */
+ struct vub300_mmc_host *vub300 = kref_to_vub300_mmc_host(kref);
+ struct mmc_host *mmc = vub300->mmc;
+ usb_free_urb(vub300->command_out_urb);
+ vub300->command_out_urb = NULL;
+ usb_free_urb(vub300->command_res_urb);
+ vub300->command_res_urb = NULL;
+ usb_put_dev(vub300->udev);
+ mmc_free_host(mmc);
+ /*
+ * and hence also frees vub300
+ * which is contained at the end of struct mmc
+ */
+}
+
+static void vub300_queue_cmnd_work(struct vub300_mmc_host *vub300)
+{
+ kref_get(&vub300->kref);
+ if (queue_work(cmndworkqueue, &vub300->cmndwork)) {
+ /*
+ * then the cmndworkqueue was not previously
+ * running and the above get ref is obvious
+ * required and will be put when the thread
+ * terminates by a specific call
+ */
+ } else {
+ /*
+ * the cmndworkqueue was already running from
+ * a previous invocation and thus to keep the
+ * kref counts correct we must undo the get
+ */
+ kref_put(&vub300->kref, vub300_delete);
+ }
+}
+
+static void vub300_queue_poll_work(struct vub300_mmc_host *vub300, int delay)
+{
+ kref_get(&vub300->kref);
+ if (queue_delayed_work(pollworkqueue, &vub300->pollwork, delay)) {
+ /*
+ * then the pollworkqueue was not previously
+ * running and the above get ref is obvious
+ * required and will be put when the thread
+ * terminates by a specific call
+ */
+ } else {
+ /*
+ * the pollworkqueue was already running from
+ * a previous invocation and thus to keep the
+ * kref counts correct we must undo the get
+ */
+ kref_put(&vub300->kref, vub300_delete);
+ }
+}
+
+static void vub300_queue_dead_work(struct vub300_mmc_host *vub300)
+{
+ kref_get(&vub300->kref);
+ if (queue_work(deadworkqueue, &vub300->deadwork)) {
+ /*
+ * then the deadworkqueue was not previously
+ * running and the above get ref is obvious
+ * required and will be put when the thread
+ * terminates by a specific call
+ */
+ } else {
+ /*
+ * the deadworkqueue was already running from
+ * a previous invocation and thus to keep the
+ * kref counts correct we must undo the get
+ */
+ kref_put(&vub300->kref, vub300_delete);
+ }
+}
+
+static void irqpoll_res_completed(struct urb *urb)
+{ /* urb completion handler - hardirq */
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+ if (urb->status)
+ vub300->usb_transport_fail = urb->status;
+ complete(&vub300->irqpoll_complete);
+}
+
+static void irqpoll_out_completed(struct urb *urb)
+{ /* urb completion handler - hardirq */
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+ if (urb->status) {
+ vub300->usb_transport_fail = urb->status;
+ complete(&vub300->irqpoll_complete);
+ return;
+ } else {
+ int ret;
+ unsigned int pipe =
+ usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
+ usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
+ &vub300->resp, sizeof(vub300->resp),
+ irqpoll_res_completed, vub300);
+ vub300->command_res_urb->actual_length = 0;
+ ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
+ if (ret) {
+ vub300->usb_transport_fail = ret;
+ complete(&vub300->irqpoll_complete);
+ }
+ return;
+ }
+}
+
+static void send_irqpoll(struct vub300_mmc_host *vub300)
+{
+ /* cmd_mutex is held by vub300_pollwork_thread */
+ int retval;
+ int timeout = 0xFFFF & (0x0001FFFF - firmware_irqpoll_timeout);
+ vub300->cmnd.poll.header_size = 22;
+ vub300->cmnd.poll.header_type = 1;
+ vub300->cmnd.poll.port_number = 0;
+ vub300->cmnd.poll.command_type = 2;
+ vub300->cmnd.poll.poll_timeout_lsb = 0xFF & (unsigned)timeout;
+ vub300->cmnd.poll.poll_timeout_msb = 0xFF & (unsigned)(timeout >> 8);
+ usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
+ usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep)
+ , &vub300->cmnd, sizeof(vub300->cmnd)
+ , irqpoll_out_completed, vub300);
+ retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
+ if (0 > retval) {
+ vub300->usb_transport_fail = retval;
+ vub300_queue_poll_work(vub300, 1);
+ complete(&vub300->irqpoll_complete);
+ return;
+ } else {
+ return;
+ }
+}
+
+static void new_system_port_status(struct vub300_mmc_host *vub300)
+{
+ int old_card_present = vub300->card_present;
+ int new_card_present =
+ (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
+ vub300->read_only =
+ (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
+ if (new_card_present && !old_card_present) {
+ dev_info(&vub300->udev->dev, "card just inserted\n");
+ vub300->card_present = 1;
+ vub300->bus_width = 0;
+ if (disable_offload_processing)
+ strncpy(vub300->vub_name, "EMPTY Processing Disabled",
+ sizeof(vub300->vub_name));
+ else
+ vub300->vub_name[0] = 0;
+ mmc_detect_change(vub300->mmc, 1);
+ } else if (!new_card_present && old_card_present) {
+ dev_info(&vub300->udev->dev, "card just ejected\n");
+ vub300->card_present = 0;
+ mmc_detect_change(vub300->mmc, 0);
+ } else {
+ /* no change */
+ }
+}
+
+static void __add_offloaded_reg_to_fifo(struct vub300_mmc_host *vub300,
+ struct offload_registers_access
+ *register_access, u8 func)
+{
+ u8 r = vub300->fn[func].offload_point + vub300->fn[func].offload_count;
+ memcpy(&vub300->fn[func].reg[MAXREGMASK & r], register_access,
+ sizeof(struct offload_registers_access));
+ vub300->fn[func].offload_count += 1;
+ vub300->total_offload_count += 1;
+}
+
+static void add_offloaded_reg(struct vub300_mmc_host *vub300,
+ struct offload_registers_access *register_access)
+{
+ u32 Register = ((0x03 & register_access->command_byte[0]) << 15)
+ | ((0xFF & register_access->command_byte[1]) << 7)
+ | ((0xFE & register_access->command_byte[2]) >> 1);
+ u8 func = ((0x70 & register_access->command_byte[0]) >> 4);
+ u8 regs = vub300->dynamic_register_count;
+ u8 i = 0;
+ while (0 < regs-- && 1 == vub300->sdio_register[i].activate) {
+ if (vub300->sdio_register[i].func_num == func &&
+ vub300->sdio_register[i].sdio_reg == Register) {
+ if (vub300->sdio_register[i].prepared == 0)
+ vub300->sdio_register[i].prepared = 1;
+ vub300->sdio_register[i].response =
+ register_access->Respond_Byte[2];
+ vub300->sdio_register[i].regvalue =
+ register_access->Respond_Byte[3];
+ return;
+ } else {
+ i += 1;
+ continue;
+ }
+ };
+ __add_offloaded_reg_to_fifo(vub300, register_access, func);
+}
+
+static void check_vub300_port_status(struct vub300_mmc_host *vub300)
+{
+ /*
+ * cmd_mutex is held by vub300_pollwork_thread,
+ * vub300_deadwork_thread or vub300_cmndwork_thread
+ */
+ int retval;
+ retval =
+ usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+ GET_SYSTEM_PORT_STATUS,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x0000, 0x0000, &vub300->system_port_status,
+ sizeof(vub300->system_port_status), HZ);
+ if (sizeof(vub300->system_port_status) == retval)
+ new_system_port_status(vub300);
+}
+
+static void __vub300_irqpoll_response(struct vub300_mmc_host *vub300)
+{
+ /* cmd_mutex is held by vub300_pollwork_thread */
+ if (vub300->command_res_urb->actual_length == 0)
+ return;
+
+ switch (vub300->resp.common.header_type) {
+ case RESPONSE_INTERRUPT:
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irq_enabled)
+ mmc_signal_sdio_irq(vub300->mmc);
+ else
+ vub300->irqs_queued += 1;
+ vub300->irq_disabled = 1;
+ mutex_unlock(&vub300->irq_mutex);
+ break;
+ case RESPONSE_ERROR:
+ if (vub300->resp.error.error_code == SD_ERROR_NO_DEVICE)
+ check_vub300_port_status(vub300);
+ break;
+ case RESPONSE_STATUS:
+ vub300->system_port_status = vub300->resp.status;
+ new_system_port_status(vub300);
+ if (!vub300->card_present)
+ vub300_queue_poll_work(vub300, HZ / 5);
+ break;
+ case RESPONSE_IRQ_DISABLED:
+ {
+ int offloaded_data_length = vub300->resp.common.header_size - 3;
+ int register_count = offloaded_data_length >> 3;
+ int ri = 0;
+ while (register_count--) {
+ add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
+ ri += 1;
+ }
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irq_enabled)
+ mmc_signal_sdio_irq(vub300->mmc);
+ else
+ vub300->irqs_queued += 1;
+ vub300->irq_disabled = 1;
+ mutex_unlock(&vub300->irq_mutex);
+ break;
+ }
+ case RESPONSE_IRQ_ENABLED:
+ {
+ int offloaded_data_length = vub300->resp.common.header_size - 3;
+ int register_count = offloaded_data_length >> 3;
+ int ri = 0;
+ while (register_count--) {
+ add_offloaded_reg(vub300, &vub300->resp.irq.reg[ri]);
+ ri += 1;
+ }
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irq_enabled)
+ mmc_signal_sdio_irq(vub300->mmc);
+ else if (vub300->irqs_queued)
+ vub300->irqs_queued += 1;
+ else
+ vub300->irqs_queued += 1;
+ vub300->irq_disabled = 0;
+ mutex_unlock(&vub300->irq_mutex);
+ break;
+ }
+ case RESPONSE_NO_INTERRUPT:
+ vub300_queue_poll_work(vub300, 1);
+ break;
+ default:
+ break;
+ }
+}
+
+static void __do_poll(struct vub300_mmc_host *vub300)
+{
+ /* cmd_mutex is held by vub300_pollwork_thread */
+ long commretval;
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ init_completion(&vub300->irqpoll_complete);
+ send_irqpoll(vub300);
+ commretval = wait_for_completion_timeout(&vub300->irqpoll_complete,
+ msecs_to_jiffies(500));
+ if (vub300->usb_transport_fail) {
+ /* no need to do anything */
+ } else if (commretval == 0) {
+ vub300->usb_timed_out = 1;
+ usb_kill_urb(vub300->command_out_urb);
+ usb_kill_urb(vub300->command_res_urb);
+ } else if (commretval < 0) {
+ vub300_queue_poll_work(vub300, 1);
+ } else { /* commretval > 0 */
+ __vub300_irqpoll_response(vub300);
+ }
+}
+
+/* this thread runs only when the driver
+ * is trying to poll the device for an IRQ
+ */
+static void vub300_pollwork_thread(struct work_struct *work)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = container_of(work,
+ struct vub300_mmc_host, pollwork.work);
+ if (!vub300->interface) {
+ kref_put(&vub300->kref, vub300_delete);
+ return;
+ }
+ mutex_lock(&vub300->cmd_mutex);
+ if (vub300->cmd) {
+ vub300_queue_poll_work(vub300, 1);
+ } else if (!vub300->card_present) {
+ /* no need to do anything */
+ } else { /* vub300->card_present */
+ mutex_lock(&vub300->irq_mutex);
+ if (!vub300->irq_enabled) {
+ mutex_unlock(&vub300->irq_mutex);
+ } else if (vub300->irqs_queued) {
+ vub300->irqs_queued -= 1;
+ mmc_signal_sdio_irq(vub300->mmc);
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ mutex_unlock(&vub300->irq_mutex);
+ } else { /* NOT vub300->irqs_queued */
+ mutex_unlock(&vub300->irq_mutex);
+ __do_poll(vub300);
+ }
+ }
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+}
+
+static void vub300_deadwork_thread(struct work_struct *work)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 =
+ container_of(work, struct vub300_mmc_host, deadwork);
+ if (!vub300->interface) {
+ kref_put(&vub300->kref, vub300_delete);
+ return;
+ }
+ mutex_lock(&vub300->cmd_mutex);
+ if (vub300->cmd) {
+ /*
+ * a command got in as the inactivity
+ * timer expired - so we just let the
+ * processing of the command show if
+ * the device is dead
+ */
+ } else if (vub300->card_present) {
+ check_vub300_port_status(vub300);
+ } else if (vub300->mmc && vub300->mmc->card &&
+ mmc_card_present(vub300->mmc->card)) {
+ /*
+ * the MMC core must not have responded
+ * to the previous indication - lets
+ * hope that it eventually does so we
+ * will just ignore this for now
+ */
+ } else {
+ check_vub300_port_status(vub300);
+ }
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+}
+
+static void vub300_inactivity_timer_expired(unsigned long data)
+{ /* softirq */
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
+ if (!vub300->interface) {
+ kref_put(&vub300->kref, vub300_delete);
+ } else if (vub300->cmd) {
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ } else {
+ vub300_queue_dead_work(vub300);
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ }
+}
+
+static int vub300_response_error(u8 error_code)
+{
+ switch (error_code) {
+ case SD_ERROR_PIO_TIMEOUT:
+ case SD_ERROR_1BIT_TIMEOUT:
+ case SD_ERROR_4BIT_TIMEOUT:
+ return -ETIMEDOUT;
+ case SD_ERROR_STAT_DATA:
+ case SD_ERROR_OVERRUN:
+ case SD_ERROR_STAT_CMD:
+ case SD_ERROR_STAT_CMD_TIMEOUT:
+ case SD_ERROR_SDCRDY_STUCK:
+ case SD_ERROR_UNHANDLED:
+ case SD_ERROR_1BIT_CRC_WRONG:
+ case SD_ERROR_4BIT_CRC_WRONG:
+ case SD_ERROR_1BIT_CRC_ERROR:
+ case SD_ERROR_4BIT_CRC_ERROR:
+ case SD_ERROR_NO_CMD_ENDBIT:
+ case SD_ERROR_NO_1BIT_DATEND:
+ case SD_ERROR_NO_4BIT_DATEND:
+ case SD_ERROR_1BIT_DATA_TIMEOUT:
+ case SD_ERROR_4BIT_DATA_TIMEOUT:
+ case SD_ERROR_1BIT_UNEXPECTED_TIMEOUT:
+ case SD_ERROR_4BIT_UNEXPECTED_TIMEOUT:
+ return -EILSEQ;
+ case 33:
+ return -EILSEQ;
+ case SD_ERROR_ILLEGAL_COMMAND:
+ return -EINVAL;
+ case SD_ERROR_NO_DEVICE:
+ return -ENOMEDIUM;
+ default:
+ return -ENODEV;
+ }
+}
+
+static void command_res_completed(struct urb *urb)
+{ /* urb completion handler - hardirq */
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+ if (urb->status) {
+ /* we have to let the initiator handle the error */
+ } else if (vub300->command_res_urb->actual_length == 0) {
+ /*
+ * we have seen this happen once or twice and
+ * we suspect a buggy USB host controller
+ */
+ } else if (!vub300->data) {
+ /* this means that the command (typically CMD52) suceeded */
+ } else if (vub300->resp.common.header_type != 0x02) {
+ /*
+ * this is an error response from the VUB300 chip
+ * and we let the initiator handle it
+ */
+ } else if (vub300->urb) {
+ vub300->cmd->error =
+ vub300_response_error(vub300->resp.error.error_code);
+ usb_unlink_urb(vub300->urb);
+ } else {
+ vub300->cmd->error =
+ vub300_response_error(vub300->resp.error.error_code);
+ usb_sg_cancel(&vub300->sg_request);
+ }
+ complete(&vub300->command_complete); /* got_response_in */
+}
+
+static void command_out_completed(struct urb *urb)
+{ /* urb completion handler - hardirq */
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)urb->context;
+ if (urb->status) {
+ complete(&vub300->command_complete);
+ } else {
+ int ret;
+ unsigned int pipe =
+ usb_rcvbulkpipe(vub300->udev, vub300->cmnd_res_ep);
+ usb_fill_bulk_urb(vub300->command_res_urb, vub300->udev, pipe,
+ &vub300->resp, sizeof(vub300->resp),
+ command_res_completed, vub300);
+ vub300->command_res_urb->actual_length = 0;
+ ret = usb_submit_urb(vub300->command_res_urb, GFP_ATOMIC);
+ if (ret == 0) {
+ /*
+ * the urb completion handler will call
+ * our completion handler
+ */
+ } else {
+ /*
+ * and thus we only call it directly
+ * when it will not be called
+ */
+ complete(&vub300->command_complete);
+ }
+ }
+}
+
+/*
+ * the STUFF bits are masked out for the comparisons
+ */
+static void snoop_block_size_and_bus_width(struct vub300_mmc_host *vub300,
+ u32 cmd_arg)
+{
+ if ((0xFBFFFE00 & cmd_arg) == 0x80022200)
+ vub300->fbs[1] = (cmd_arg << 8) | (0x00FF & vub300->fbs[1]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80022000)
+ vub300->fbs[1] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[1]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80042200)
+ vub300->fbs[2] = (cmd_arg << 8) | (0x00FF & vub300->fbs[2]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80042000)
+ vub300->fbs[2] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[2]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80062200)
+ vub300->fbs[3] = (cmd_arg << 8) | (0x00FF & vub300->fbs[3]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80062000)
+ vub300->fbs[3] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[3]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80082200)
+ vub300->fbs[4] = (cmd_arg << 8) | (0x00FF & vub300->fbs[4]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x80082000)
+ vub300->fbs[4] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[4]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800A2200)
+ vub300->fbs[5] = (cmd_arg << 8) | (0x00FF & vub300->fbs[5]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800A2000)
+ vub300->fbs[5] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[5]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800C2200)
+ vub300->fbs[6] = (cmd_arg << 8) | (0x00FF & vub300->fbs[6]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800C2000)
+ vub300->fbs[6] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[6]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800E2200)
+ vub300->fbs[7] = (cmd_arg << 8) | (0x00FF & vub300->fbs[7]);
+ else if ((0xFBFFFE00 & cmd_arg) == 0x800E2000)
+ vub300->fbs[7] = (0xFF & cmd_arg) | (0xFF00 & vub300->fbs[7]);
+ else if ((0xFBFFFE03 & cmd_arg) == 0x80000E00)
+ vub300->bus_width = 1;
+ else if ((0xFBFFFE03 & cmd_arg) == 0x80000E02)
+ vub300->bus_width = 4;
+}
+
+static void send_command(struct vub300_mmc_host *vub300)
+{
+ /* cmd_mutex is held by vub300_cmndwork_thread */
+ struct mmc_command *cmd = vub300->cmd;
+ struct mmc_data *data = vub300->data;
+ int retval;
+ int i;
+ u8 response_type;
+ if (vub300->app_spec) {
+ switch (cmd->opcode) {
+ case 6:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ if (0x00000000 == (0x00000003 & cmd->arg))
+ vub300->bus_width = 1;
+ else if (0x00000002 == (0x00000003 & cmd->arg))
+ vub300->bus_width = 4;
+ else
+ dev_err(&vub300->udev->dev,
+ "unexpected ACMD6 bus_width=%d\n",
+ 0x00000003 & cmd->arg);
+ break;
+ case 13:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 22:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 23:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 41:
+ response_type = SDRT_3;
+ vub300->resp_len = 6;
+ break;
+ case 42:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 51:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 55:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ default:
+ vub300->resp_len = 0;
+ cmd->error = -EINVAL;
+ complete(&vub300->command_complete);
+ return;
+ }
+ vub300->app_spec = 0;
+ } else {
+ switch (cmd->opcode) {
+ case 0:
+ response_type = SDRT_NONE;
+ vub300->resp_len = 0;
+ break;
+ case 1:
+ response_type = SDRT_3;
+ vub300->resp_len = 6;
+ break;
+ case 2:
+ response_type = SDRT_2;
+ vub300->resp_len = 17;
+ break;
+ case 3:
+ response_type = SDRT_6;
+ vub300->resp_len = 6;
+ break;
+ case 4:
+ response_type = SDRT_NONE;
+ vub300->resp_len = 0;
+ break;
+ case 5:
+ response_type = SDRT_4;
+ vub300->resp_len = 6;
+ break;
+ case 6:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 7:
+ response_type = SDRT_1B;
+ vub300->resp_len = 6;
+ break;
+ case 8:
+ response_type = SDRT_7;
+ vub300->resp_len = 6;
+ break;
+ case 9:
+ response_type = SDRT_2;
+ vub300->resp_len = 17;
+ break;
+ case 10:
+ response_type = SDRT_2;
+ vub300->resp_len = 17;
+ break;
+ case 12:
+ response_type = SDRT_1B;
+ vub300->resp_len = 6;
+ break;
+ case 13:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 15:
+ response_type = SDRT_NONE;
+ vub300->resp_len = 0;
+ break;
+ case 16:
+ for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
+ vub300->fbs[i] = 0xFFFF & cmd->arg;
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 17:
+ case 18:
+ case 24:
+ case 25:
+ case 27:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 28:
+ case 29:
+ response_type = SDRT_1B;
+ vub300->resp_len = 6;
+ break;
+ case 30:
+ case 32:
+ case 33:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 38:
+ response_type = SDRT_1B;
+ vub300->resp_len = 6;
+ break;
+ case 42:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ case 52:
+ response_type = SDRT_5;
+ vub300->resp_len = 6;
+ snoop_block_size_and_bus_width(vub300, cmd->arg);
+ break;
+ case 53:
+ response_type = SDRT_5;
+ vub300->resp_len = 6;
+ break;
+ case 55:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ vub300->app_spec = 1;
+ break;
+ case 56:
+ response_type = SDRT_1;
+ vub300->resp_len = 6;
+ break;
+ default:
+ vub300->resp_len = 0;
+ cmd->error = -EINVAL;
+ complete(&vub300->command_complete);
+ return;
+ }
+ }
+ /*
+ * it is a shame that we can not use "sizeof(struct sd_command_header)"
+ * this is because the packet _must_ be padded to 64 bytes
+ */
+ vub300->cmnd.head.header_size = 20;
+ vub300->cmnd.head.header_type = 0x00;
+ vub300->cmnd.head.port_number = 0; /* "0" means port 1 */
+ vub300->cmnd.head.command_type = 0x00; /* standard read command */
+ vub300->cmnd.head.response_type = response_type;
+ vub300->cmnd.head.command_index = cmd->opcode;
+ vub300->cmnd.head.arguments[0] = cmd->arg >> 24;
+ vub300->cmnd.head.arguments[1] = cmd->arg >> 16;
+ vub300->cmnd.head.arguments[2] = cmd->arg >> 8;
+ vub300->cmnd.head.arguments[3] = cmd->arg >> 0;
+ if (cmd->opcode == 52) {
+ int fn = 0x7 & (cmd->arg >> 28);
+ vub300->cmnd.head.block_count[0] = 0;
+ vub300->cmnd.head.block_count[1] = 0;
+ vub300->cmnd.head.block_size[0] = (vub300->fbs[fn] >> 8) & 0xFF;
+ vub300->cmnd.head.block_size[1] = (vub300->fbs[fn] >> 0) & 0xFF;
+ vub300->cmnd.head.command_type = 0x00;
+ vub300->cmnd.head.transfer_size[0] = 0;
+ vub300->cmnd.head.transfer_size[1] = 0;
+ vub300->cmnd.head.transfer_size[2] = 0;
+ vub300->cmnd.head.transfer_size[3] = 0;
+ } else if (!data) {
+ vub300->cmnd.head.block_count[0] = 0;
+ vub300->cmnd.head.block_count[1] = 0;
+ vub300->cmnd.head.block_size[0] = (vub300->fbs[0] >> 8) & 0xFF;
+ vub300->cmnd.head.block_size[1] = (vub300->fbs[0] >> 0) & 0xFF;
+ vub300->cmnd.head.command_type = 0x00;
+ vub300->cmnd.head.transfer_size[0] = 0;
+ vub300->cmnd.head.transfer_size[1] = 0;
+ vub300->cmnd.head.transfer_size[2] = 0;
+ vub300->cmnd.head.transfer_size[3] = 0;
+ } else if (cmd->opcode == 53) {
+ int fn = 0x7 & (cmd->arg >> 28);
+ if (0x08 & vub300->cmnd.head.arguments[0]) { /* BLOCK MODE */
+ vub300->cmnd.head.block_count[0] =
+ (data->blocks >> 8) & 0xFF;
+ vub300->cmnd.head.block_count[1] =
+ (data->blocks >> 0) & 0xFF;
+ vub300->cmnd.head.block_size[0] =
+ (data->blksz >> 8) & 0xFF;
+ vub300->cmnd.head.block_size[1] =
+ (data->blksz >> 0) & 0xFF;
+ } else { /* BYTE MODE */
+ vub300->cmnd.head.block_count[0] = 0;
+ vub300->cmnd.head.block_count[1] = 0;
+ vub300->cmnd.head.block_size[0] =
+ (vub300->datasize >> 8) & 0xFF;
+ vub300->cmnd.head.block_size[1] =
+ (vub300->datasize >> 0) & 0xFF;
+ }
+ vub300->cmnd.head.command_type =
+ (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
+ vub300->cmnd.head.transfer_size[0] =
+ (vub300->datasize >> 24) & 0xFF;
+ vub300->cmnd.head.transfer_size[1] =
+ (vub300->datasize >> 16) & 0xFF;
+ vub300->cmnd.head.transfer_size[2] =
+ (vub300->datasize >> 8) & 0xFF;
+ vub300->cmnd.head.transfer_size[3] =
+ (vub300->datasize >> 0) & 0xFF;
+ if (vub300->datasize < vub300->fbs[fn]) {
+ vub300->cmnd.head.block_count[0] = 0;
+ vub300->cmnd.head.block_count[1] = 0;
+ }
+ } else {
+ vub300->cmnd.head.block_count[0] = (data->blocks >> 8) & 0xFF;
+ vub300->cmnd.head.block_count[1] = (data->blocks >> 0) & 0xFF;
+ vub300->cmnd.head.block_size[0] = (data->blksz >> 8) & 0xFF;
+ vub300->cmnd.head.block_size[1] = (data->blksz >> 0) & 0xFF;
+ vub300->cmnd.head.command_type =
+ (MMC_DATA_READ & data->flags) ? 0x00 : 0x80;
+ vub300->cmnd.head.transfer_size[0] =
+ (vub300->datasize >> 24) & 0xFF;
+ vub300->cmnd.head.transfer_size[1] =
+ (vub300->datasize >> 16) & 0xFF;
+ vub300->cmnd.head.transfer_size[2] =
+ (vub300->datasize >> 8) & 0xFF;
+ vub300->cmnd.head.transfer_size[3] =
+ (vub300->datasize >> 0) & 0xFF;
+ if (vub300->datasize < vub300->fbs[0]) {
+ vub300->cmnd.head.block_count[0] = 0;
+ vub300->cmnd.head.block_count[1] = 0;
+ }
+ }
+ if (vub300->cmnd.head.block_size[0] || vub300->cmnd.head.block_size[1]) {
+ u16 block_size = vub300->cmnd.head.block_size[1] |
+ (vub300->cmnd.head.block_size[0] << 8);
+ u16 block_boundary = FIRMWARE_BLOCK_BOUNDARY -
+ (FIRMWARE_BLOCK_BOUNDARY % block_size);
+ vub300->cmnd.head.block_boundary[0] =
+ (block_boundary >> 8) & 0xFF;
+ vub300->cmnd.head.block_boundary[1] =
+ (block_boundary >> 0) & 0xFF;
+ } else {
+ vub300->cmnd.head.block_boundary[0] = 0;
+ vub300->cmnd.head.block_boundary[1] = 0;
+ }
+ usb_fill_bulk_urb(vub300->command_out_urb, vub300->udev,
+ usb_sndbulkpipe(vub300->udev, vub300->cmnd_out_ep),
+ &vub300->cmnd, sizeof(vub300->cmnd),
+ command_out_completed, vub300);
+ retval = usb_submit_urb(vub300->command_out_urb, GFP_KERNEL);
+ if (retval < 0) {
+ cmd->error = retval;
+ complete(&vub300->command_complete);
+ return;
+ } else {
+ return;
+ }
+}
+
+/*
+ * timer callback runs in atomic mode
+ * so it cannot call usb_kill_urb()
+ */
+static void vub300_sg_timed_out(unsigned long data)
+{
+ struct vub300_mmc_host *vub300 = (struct vub300_mmc_host *)data;
+ vub300->usb_timed_out = 1;
+ usb_sg_cancel(&vub300->sg_request);
+ usb_unlink_urb(vub300->command_out_urb);
+ usb_unlink_urb(vub300->command_res_urb);
+}
+
+static u16 roundup_to_multiple_of_64(u16 number)
+{
+ return 0xFFC0 & (0x3F + number);
+}
+
+/*
+ * this is a separate function to solve the 80 column width restriction
+ */
+static void __download_offload_pseudocode(struct vub300_mmc_host *vub300,
+ const struct firmware *fw)
+{
+ u8 register_count = 0;
+ u16 ts = 0;
+ u16 interrupt_size = 0;
+ const u8 *data = fw->data;
+ int size = fw->size;
+ u8 c;
+ dev_info(&vub300->udev->dev, "using %s for SDIO offload processing\n",
+ vub300->vub_name);
+ do {
+ c = *data++;
+ } while (size-- && c); /* skip comment */
+ dev_info(&vub300->udev->dev, "using offload firmware %s %s\n", fw->data,
+ vub300->vub_name);
+ if (size < 4) {
+ dev_err(&vub300->udev->dev,
+ "corrupt offload pseudocode in firmware %s\n",
+ vub300->vub_name);
+ strncpy(vub300->vub_name, "corrupt offload pseudocode",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ interrupt_size += *data++;
+ size -= 1;
+ interrupt_size <<= 8;
+ interrupt_size += *data++;
+ size -= 1;
+ if (interrupt_size < size) {
+ u16 xfer_length = roundup_to_multiple_of_64(interrupt_size);
+ u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
+ if (xfer_buffer) {
+ int retval;
+ memcpy(xfer_buffer, data, interrupt_size);
+ memset(xfer_buffer + interrupt_size, 0,
+ xfer_length - interrupt_size);
+ size -= interrupt_size;
+ data += interrupt_size;
+ retval =
+ usb_control_msg(vub300->udev,
+ usb_sndctrlpipe(vub300->udev, 0),
+ SET_INTERRUPT_PSEUDOCODE,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, 0x0000, 0x0000,
+ xfer_buffer, xfer_length, HZ);
+ kfree(xfer_buffer);
+ if (retval < 0) {
+ strncpy(vub300->vub_name,
+ "SDIO pseudocode download failed",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ } else {
+ dev_err(&vub300->udev->dev,
+ "not enough memory for xfer buffer to send"
+ " INTERRUPT_PSEUDOCODE for %s %s\n", fw->data,
+ vub300->vub_name);
+ strncpy(vub300->vub_name,
+ "SDIO interrupt pseudocode download failed",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ } else {
+ dev_err(&vub300->udev->dev,
+ "corrupt interrupt pseudocode in firmware %s %s\n",
+ fw->data, vub300->vub_name);
+ strncpy(vub300->vub_name, "corrupt interrupt pseudocode",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ ts += *data++;
+ size -= 1;
+ ts <<= 8;
+ ts += *data++;
+ size -= 1;
+ if (ts < size) {
+ u16 xfer_length = roundup_to_multiple_of_64(ts);
+ u8 *xfer_buffer = kmalloc(xfer_length, GFP_KERNEL);
+ if (xfer_buffer) {
+ int retval;
+ memcpy(xfer_buffer, data, ts);
+ memset(xfer_buffer + ts, 0,
+ xfer_length - ts);
+ size -= ts;
+ data += ts;
+ retval =
+ usb_control_msg(vub300->udev,
+ usb_sndctrlpipe(vub300->udev, 0),
+ SET_TRANSFER_PSEUDOCODE,
+ USB_DIR_OUT | USB_TYPE_VENDOR |
+ USB_RECIP_DEVICE, 0x0000, 0x0000,
+ xfer_buffer, xfer_length, HZ);
+ kfree(xfer_buffer);
+ if (retval < 0) {
+ strncpy(vub300->vub_name,
+ "SDIO pseudocode download failed",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ } else {
+ dev_err(&vub300->udev->dev,
+ "not enough memory for xfer buffer to send"
+ " TRANSFER_PSEUDOCODE for %s %s\n", fw->data,
+ vub300->vub_name);
+ strncpy(vub300->vub_name,
+ "SDIO transfer pseudocode download failed",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ } else {
+ dev_err(&vub300->udev->dev,
+ "corrupt transfer pseudocode in firmware %s %s\n",
+ fw->data, vub300->vub_name);
+ strncpy(vub300->vub_name, "corrupt transfer pseudocode",
+ sizeof(vub300->vub_name));
+ return;
+ }
+ register_count += *data++;
+ size -= 1;
+ if (register_count * 4 == size) {
+ int I = vub300->dynamic_register_count = register_count;
+ int i = 0;
+ while (I--) {
+ unsigned int func_num = 0;
+ vub300->sdio_register[i].func_num = *data++;
+ size -= 1;
+ func_num += *data++;
+ size -= 1;
+ func_num <<= 8;
+ func_num += *data++;
+ size -= 1;
+ func_num <<= 8;
+ func_num += *data++;
+ size -= 1;
+ vub300->sdio_register[i].sdio_reg = func_num;
+ vub300->sdio_register[i].activate = 1;
+ vub300->sdio_register[i].prepared = 0;
+ i += 1;
+ }
+ dev_info(&vub300->udev->dev,
+ "initialized %d dynamic pseudocode registers\n",
+ vub300->dynamic_register_count);
+ return;
+ } else {
+ dev_err(&vub300->udev->dev,
+ "corrupt dynamic registers in firmware %s\n",
+ vub300->vub_name);
+ strncpy(vub300->vub_name, "corrupt dynamic registers",
+ sizeof(vub300->vub_name));
+ return;
+ }
+}
+
+/*
+ * if the binary containing the EMPTY PseudoCode can not be found
+ * vub300->vub_name is set anyway in order to prevent an automatic retry
+ */
+static void download_offload_pseudocode(struct vub300_mmc_host *vub300)
+{
+ struct mmc_card *card = vub300->mmc->card;
+ int sdio_funcs = card->sdio_funcs;
+ const struct firmware *fw = NULL;
+ int l = snprintf(vub300->vub_name, sizeof(vub300->vub_name),
+ "vub_%04X%04X", card->cis.vendor, card->cis.device);
+ int n = 0;
+ int retval;
+ for (n = 0; n < sdio_funcs; n++) {
+ struct sdio_func *sf = card->sdio_func[n];
+ l += snprintf(vub300->vub_name + l,
+ sizeof(vub300->vub_name) - l, "_%04X%04X",
+ sf->vendor, sf->device);
+ };
+ snprintf(vub300->vub_name + l, sizeof(vub300->vub_name) - l, ".bin");
+ dev_info(&vub300->udev->dev, "requesting offload firmware %s\n",
+ vub300->vub_name);
+ retval = request_firmware(&fw, vub300->vub_name, &card->dev);
+ if (retval < 0) {
+ strncpy(vub300->vub_name, "vub_default.bin",
+ sizeof(vub300->vub_name));
+ retval = request_firmware(&fw, vub300->vub_name, &card->dev);
+ if (retval < 0) {
+ strncpy(vub300->vub_name,
+ "no SDIO offload firmware found",
+ sizeof(vub300->vub_name));
+ } else {
+ __download_offload_pseudocode(vub300, fw);
+ release_firmware(fw);
+ }
+ } else {
+ __download_offload_pseudocode(vub300, fw);
+ release_firmware(fw);
+ }
+}
+
+static void vub300_usb_bulk_msg_completion(struct urb *urb)
+{ /* urb completion handler - hardirq */
+ complete((struct completion *)urb->context);
+}
+
+static int vub300_usb_bulk_msg(struct vub300_mmc_host *vub300,
+ unsigned int pipe, void *data, int len,
+ int *actual_length, int timeout_msecs)
+{
+ /* cmd_mutex is held by vub300_cmndwork_thread */
+ struct usb_device *usb_dev = vub300->udev;
+ struct completion done;
+ int retval;
+ vub300->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!vub300->urb)
+ return -ENOMEM;
+ usb_fill_bulk_urb(vub300->urb, usb_dev, pipe, data, len,
+ vub300_usb_bulk_msg_completion, NULL);
+ init_completion(&done);
+ vub300->urb->context = &done;
+ vub300->urb->actual_length = 0;
+ retval = usb_submit_urb(vub300->urb, GFP_KERNEL);
+ if (unlikely(retval))
+ goto out;
+ if (!wait_for_completion_timeout
+ (&done, msecs_to_jiffies(timeout_msecs))) {
+ retval = -ETIMEDOUT;
+ usb_kill_urb(vub300->urb);
+ } else {
+ retval = vub300->urb->status;
+ }
+out:
+ *actual_length = vub300->urb->actual_length;
+ usb_free_urb(vub300->urb);
+ vub300->urb = NULL;
+ return retval;
+}
+
+static int __command_read_data(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd, struct mmc_data *data)
+{
+ /* cmd_mutex is held by vub300_cmndwork_thread */
+ int linear_length = vub300->datasize;
+ int padded_length = vub300->large_usb_packets ?
+ ((511 + linear_length) >> 9) << 9 :
+ ((63 + linear_length) >> 6) << 6;
+ if ((padded_length == linear_length) || !pad_input_to_usb_pkt) {
+ int result;
+ unsigned pipe;
+ pipe = usb_rcvbulkpipe(vub300->udev, vub300->data_inp_ep);
+ result = usb_sg_init(&vub300->sg_request, vub300->udev,
+ pipe, 0, data->sg,
+ data->sg_len, 0, GFP_KERNEL);
+ if (result < 0) {
+ usb_unlink_urb(vub300->command_out_urb);
+ usb_unlink_urb(vub300->command_res_urb);
+ cmd->error = result;
+ data->bytes_xfered = 0;
+ return 0;
+ } else {
+ vub300->sg_transfer_timer.expires =
+ jiffies + msecs_to_jiffies(2000 +
+ (linear_length / 16384));
+ add_timer(&vub300->sg_transfer_timer);
+ usb_sg_wait(&vub300->sg_request);
+ del_timer(&vub300->sg_transfer_timer);
+ if (vub300->sg_request.status < 0) {
+ cmd->error = vub300->sg_request.status;
+ data->bytes_xfered = 0;
+ return 0;
+ } else {
+ data->bytes_xfered = vub300->datasize;
+ return linear_length;
+ }
+ }
+ } else {
+ u8 *buf = kmalloc(padded_length, GFP_KERNEL);
+ if (buf) {
+ int result;
+ unsigned pipe = usb_rcvbulkpipe(vub300->udev,
+ vub300->data_inp_ep);
+ int actual_length = 0;
+ result = vub300_usb_bulk_msg(vub300, pipe, buf,
+ padded_length, &actual_length,
+ 2000 + (padded_length / 16384));
+ if (result < 0) {
+ cmd->error = result;
+ data->bytes_xfered = 0;
+ kfree(buf);
+ return 0;
+ } else if (actual_length < linear_length) {
+ cmd->error = -EREMOTEIO;
+ data->bytes_xfered = 0;
+ kfree(buf);
+ return 0;
+ } else {
+ sg_copy_from_buffer(data->sg, data->sg_len, buf,
+ linear_length);
+ kfree(buf);
+ data->bytes_xfered = vub300->datasize;
+ return linear_length;
+ }
+ } else {
+ cmd->error = -ENOMEM;
+ data->bytes_xfered = 0;
+ return 0;
+ }
+ }
+}
+
+static int __command_write_data(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd, struct mmc_data *data)
+{
+ /* cmd_mutex is held by vub300_cmndwork_thread */
+ unsigned pipe = usb_sndbulkpipe(vub300->udev, vub300->data_out_ep);
+ int linear_length = vub300->datasize;
+ int modulo_64_length = linear_length & 0x003F;
+ int modulo_512_length = linear_length & 0x01FF;
+ if (linear_length < 64) {
+ int result;
+ int actual_length;
+ sg_copy_to_buffer(data->sg, data->sg_len,
+ vub300->padded_buffer,
+ sizeof(vub300->padded_buffer));
+ memset(vub300->padded_buffer + linear_length, 0,
+ sizeof(vub300->padded_buffer) - linear_length);
+ result = vub300_usb_bulk_msg(vub300, pipe, vub300->padded_buffer,
+ sizeof(vub300->padded_buffer),
+ &actual_length, 2000 +
+ (sizeof(vub300->padded_buffer) /
+ 16384));
+ if (result < 0) {
+ cmd->error = result;
+ data->bytes_xfered = 0;
+ } else {
+ data->bytes_xfered = vub300->datasize;
+ }
+ } else if ((!vub300->large_usb_packets && (0 < modulo_64_length)) ||
+ (vub300->large_usb_packets && (64 > modulo_512_length))
+ ) { /* don't you just love these work-rounds */
+ int padded_length = ((63 + linear_length) >> 6) << 6;
+ u8 *buf = kmalloc(padded_length, GFP_KERNEL);
+ if (buf) {
+ int result;
+ int actual_length;
+ sg_copy_to_buffer(data->sg, data->sg_len, buf,
+ padded_length);
+ memset(buf + linear_length, 0,
+ padded_length - linear_length);
+ result =
+ vub300_usb_bulk_msg(vub300, pipe, buf,
+ padded_length, &actual_length,
+ 2000 + padded_length / 16384);
+ kfree(buf);
+ if (result < 0) {
+ cmd->error = result;
+ data->bytes_xfered = 0;
+ } else {
+ data->bytes_xfered = vub300->datasize;
+ }
+ } else {
+ cmd->error = -ENOMEM;
+ data->bytes_xfered = 0;
+ }
+ } else { /* no data padding required */
+ int result;
+ unsigned char buf[64 * 4];
+ sg_copy_to_buffer(data->sg, data->sg_len, buf, sizeof(buf));
+ result = usb_sg_init(&vub300->sg_request, vub300->udev,
+ pipe, 0, data->sg,
+ data->sg_len, 0, GFP_KERNEL);
+ if (result < 0) {
+ usb_unlink_urb(vub300->command_out_urb);
+ usb_unlink_urb(vub300->command_res_urb);
+ cmd->error = result;
+ data->bytes_xfered = 0;
+ } else {
+ vub300->sg_transfer_timer.expires =
+ jiffies + msecs_to_jiffies(2000 +
+ linear_length / 16384);
+ add_timer(&vub300->sg_transfer_timer);
+ usb_sg_wait(&vub300->sg_request);
+ if (cmd->error) {
+ data->bytes_xfered = 0;
+ } else {
+ del_timer(&vub300->sg_transfer_timer);
+ if (vub300->sg_request.status < 0) {
+ cmd->error = vub300->sg_request.status;
+ data->bytes_xfered = 0;
+ } else {
+ data->bytes_xfered = vub300->datasize;
+ }
+ }
+ }
+ }
+ return linear_length;
+}
+
+static void __vub300_command_response(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd,
+ struct mmc_data *data, int data_length)
+{
+ /* cmd_mutex is held by vub300_cmndwork_thread */
+ long respretval;
+ int msec_timeout = 1000 + data_length / 4;
+ respretval =
+ wait_for_completion_timeout(&vub300->command_complete,
+ msecs_to_jiffies(msec_timeout));
+ if (respretval == 0) { /* TIMED OUT */
+ /* we don't know which of "out" and "res" if any failed */
+ int result;
+ vub300->usb_timed_out = 1;
+ usb_kill_urb(vub300->command_out_urb);
+ usb_kill_urb(vub300->command_res_urb);
+ cmd->error = -ETIMEDOUT;
+ result = usb_lock_device_for_reset(vub300->udev,
+ vub300->interface);
+ if (result == 0) {
+ result = usb_reset_device(vub300->udev);
+ usb_unlock_device(vub300->udev);
+ }
+ } else if (respretval < 0) {
+ /* we don't know which of "out" and "res" if any failed */
+ usb_kill_urb(vub300->command_out_urb);
+ usb_kill_urb(vub300->command_res_urb);
+ cmd->error = respretval;
+ } else if (cmd->error) {
+ /*
+ * the error occured sending the command
+ * or recieving the response
+ */
+ } else if (vub300->command_out_urb->status) {
+ vub300->usb_transport_fail = vub300->command_out_urb->status;
+ cmd->error = -EPROTO == vub300->command_out_urb->status ?
+ -ESHUTDOWN : vub300->command_out_urb->status;
+ } else if (vub300->command_res_urb->status) {
+ vub300->usb_transport_fail = vub300->command_res_urb->status;
+ cmd->error = -EPROTO == vub300->command_res_urb->status ?
+ -ESHUTDOWN : vub300->command_res_urb->status;
+ } else if (vub300->resp.common.header_type == 0x00) {
+ /*
+ * the command completed successfully
+ * and there was no piggybacked data
+ */
+ } else if (vub300->resp.common.header_type == RESPONSE_ERROR) {
+ cmd->error =
+ vub300_response_error(vub300->resp.error.error_code);
+ if (vub300->data)
+ usb_sg_cancel(&vub300->sg_request);
+ } else if (vub300->resp.common.header_type == RESPONSE_PIGGYBACKED) {
+ int offloaded_data_length =
+ vub300->resp.common.header_size -
+ sizeof(struct sd_register_header);
+ int register_count = offloaded_data_length >> 3;
+ int ri = 0;
+ while (register_count--) {
+ add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+ ri += 1;
+ }
+ vub300->resp.common.header_size =
+ sizeof(struct sd_register_header);
+ vub300->resp.common.header_type = 0x00;
+ cmd->error = 0;
+ } else if (vub300->resp.common.header_type == RESPONSE_PIG_DISABLED) {
+ int offloaded_data_length =
+ vub300->resp.common.header_size -
+ sizeof(struct sd_register_header);
+ int register_count = offloaded_data_length >> 3;
+ int ri = 0;
+ while (register_count--) {
+ add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+ ri += 1;
+ }
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irqs_queued) {
+ vub300->irqs_queued += 1;
+ } else if (vub300->irq_enabled) {
+ vub300->irqs_queued += 1;
+ vub300_queue_poll_work(vub300, 0);
+ } else {
+ vub300->irqs_queued += 1;
+ }
+ vub300->irq_disabled = 1;
+ mutex_unlock(&vub300->irq_mutex);
+ vub300->resp.common.header_size =
+ sizeof(struct sd_register_header);
+ vub300->resp.common.header_type = 0x00;
+ cmd->error = 0;
+ } else if (vub300->resp.common.header_type == RESPONSE_PIG_ENABLED) {
+ int offloaded_data_length =
+ vub300->resp.common.header_size -
+ sizeof(struct sd_register_header);
+ int register_count = offloaded_data_length >> 3;
+ int ri = 0;
+ while (register_count--) {
+ add_offloaded_reg(vub300, &vub300->resp.pig.reg[ri]);
+ ri += 1;
+ }
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irqs_queued) {
+ vub300->irqs_queued += 1;
+ } else if (vub300->irq_enabled) {
+ vub300->irqs_queued += 1;
+ vub300_queue_poll_work(vub300, 0);
+ } else {
+ vub300->irqs_queued += 1;
+ }
+ vub300->irq_disabled = 0;
+ mutex_unlock(&vub300->irq_mutex);
+ vub300->resp.common.header_size =
+ sizeof(struct sd_register_header);
+ vub300->resp.common.header_type = 0x00;
+ cmd->error = 0;
+ } else {
+ cmd->error = -EINVAL;
+ }
+}
+
+static void construct_request_response(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd)
+{
+ int resp_len = vub300->resp_len;
+ int less_cmd = (17 == resp_len) ? resp_len : resp_len - 1;
+ int bytes = 3 & less_cmd;
+ int words = less_cmd >> 2;
+ u8 *r = vub300->resp.response.command_response;
+ if (bytes == 3) {
+ cmd->resp[words] = (r[1 + (words << 2)] << 24)
+ | (r[2 + (words << 2)] << 16)
+ | (r[3 + (words << 2)] << 8);
+ } else if (bytes == 2) {
+ cmd->resp[words] = (r[1 + (words << 2)] << 24)
+ | (r[2 + (words << 2)] << 16);
+ } else if (bytes == 1) {
+ cmd->resp[words] = (r[1 + (words << 2)] << 24);
+ }
+ while (words-- > 0) {
+ cmd->resp[words] = (r[1 + (words << 2)] << 24)
+ | (r[2 + (words << 2)] << 16)
+ | (r[3 + (words << 2)] << 8)
+ | (r[4 + (words << 2)] << 0);
+ }
+ if ((cmd->opcode == 53) && (0x000000FF & cmd->resp[0]))
+ cmd->resp[0] &= 0xFFFFFF00;
+}
+
+/* this thread runs only when there is an upper level command req outstanding */
+static void vub300_cmndwork_thread(struct work_struct *work)
+{
+ struct vub300_mmc_host *vub300 =
+ container_of(work, struct vub300_mmc_host, cmndwork);
+ if (!vub300->interface) {
+ kref_put(&vub300->kref, vub300_delete);
+ return;
+ } else {
+ struct mmc_request *req = vub300->req;
+ struct mmc_command *cmd = vub300->cmd;
+ struct mmc_data *data = vub300->data;
+ int data_length;
+ mutex_lock(&vub300->cmd_mutex);
+ init_completion(&vub300->command_complete);
+ if (likely(vub300->vub_name[0]) || !vub300->mmc->card ||
+ !mmc_card_present(vub300->mmc->card)) {
+ /*
+ * the name of the EMPTY Pseudo firmware file
+ * is used as a flag to indicate that the file
+ * has been already downloaded to the VUB300 chip
+ */
+ } else if (0 == vub300->mmc->card->sdio_funcs) {
+ strncpy(vub300->vub_name, "SD memory device",
+ sizeof(vub300->vub_name));
+ } else {
+ download_offload_pseudocode(vub300);
+ }
+ send_command(vub300);
+ if (!data)
+ data_length = 0;
+ else if (MMC_DATA_READ & data->flags)
+ data_length = __command_read_data(vub300, cmd, data);
+ else
+ data_length = __command_write_data(vub300, cmd, data);
+ __vub300_command_response(vub300, cmd, data, data_length);
+ vub300->req = NULL;
+ vub300->cmd = NULL;
+ vub300->data = NULL;
+ if (cmd->error) {
+ if (cmd->error == -ENOMEDIUM)
+ check_vub300_port_status(vub300);
+ mutex_unlock(&vub300->cmd_mutex);
+ mmc_request_done(vub300->mmc, req);
+ kref_put(&vub300->kref, vub300_delete);
+ return;
+ } else {
+ construct_request_response(vub300, cmd);
+ vub300->resp_len = 0;
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+ mmc_request_done(vub300->mmc, req);
+ return;
+ }
+ }
+}
+
+static int examine_cyclic_buffer(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd, u8 Function)
+{
+ /* cmd_mutex is held by vub300_mmc_request */
+ u8 cmd0 = 0xFF & (cmd->arg >> 24);
+ u8 cmd1 = 0xFF & (cmd->arg >> 16);
+ u8 cmd2 = 0xFF & (cmd->arg >> 8);
+ u8 cmd3 = 0xFF & (cmd->arg >> 0);
+ int first = MAXREGMASK & vub300->fn[Function].offload_point;
+ struct offload_registers_access *rf = &vub300->fn[Function].reg[first];
+ if (cmd0 == rf->command_byte[0] &&
+ cmd1 == rf->command_byte[1] &&
+ cmd2 == rf->command_byte[2] &&
+ cmd3 == rf->command_byte[3]) {
+ u8 checksum = 0x00;
+ cmd->resp[1] = checksum << 24;
+ cmd->resp[0] = (rf->Respond_Byte[0] << 24)
+ | (rf->Respond_Byte[1] << 16)
+ | (rf->Respond_Byte[2] << 8)
+ | (rf->Respond_Byte[3] << 0);
+ vub300->fn[Function].offload_point += 1;
+ vub300->fn[Function].offload_count -= 1;
+ vub300->total_offload_count -= 1;
+ return 1;
+ } else {
+ int delta = 1; /* because it does not match the first one */
+ u8 register_count = vub300->fn[Function].offload_count - 1;
+ u32 register_point = vub300->fn[Function].offload_point + 1;
+ while (0 < register_count) {
+ int point = MAXREGMASK & register_point;
+ struct offload_registers_access *r =
+ &vub300->fn[Function].reg[point];
+ if (cmd0 == r->command_byte[0] &&
+ cmd1 == r->command_byte[1] &&
+ cmd2 == r->command_byte[2] &&
+ cmd3 == r->command_byte[3]) {
+ u8 checksum = 0x00;
+ cmd->resp[1] = checksum << 24;
+ cmd->resp[0] = (r->Respond_Byte[0] << 24)
+ | (r->Respond_Byte[1] << 16)
+ | (r->Respond_Byte[2] << 8)
+ | (r->Respond_Byte[3] << 0);
+ vub300->fn[Function].offload_point += delta;
+ vub300->fn[Function].offload_count -= delta;
+ vub300->total_offload_count -= delta;
+ return 1;
+ } else {
+ register_point += 1;
+ register_count -= 1;
+ delta += 1;
+ continue;
+ }
+ }
+ return 0;
+ }
+}
+
+static int satisfy_request_from_offloaded_data(struct vub300_mmc_host *vub300,
+ struct mmc_command *cmd)
+{
+ /* cmd_mutex is held by vub300_mmc_request */
+ u8 regs = vub300->dynamic_register_count;
+ u8 i = 0;
+ u8 func = FUN(cmd);
+ u32 reg = REG(cmd);
+ while (0 < regs--) {
+ if ((vub300->sdio_register[i].func_num == func) &&
+ (vub300->sdio_register[i].sdio_reg == reg)) {
+ if (!vub300->sdio_register[i].prepared) {
+ return 0;
+ } else if ((0x80000000 & cmd->arg) == 0x80000000) {
+ /*
+ * a write to a dynamic register
+ * nullifies our offloaded value
+ */
+ vub300->sdio_register[i].prepared = 0;
+ return 0;
+ } else {
+ u8 checksum = 0x00;
+ u8 rsp0 = 0x00;
+ u8 rsp1 = 0x00;
+ u8 rsp2 = vub300->sdio_register[i].response;
+ u8 rsp3 = vub300->sdio_register[i].regvalue;
+ vub300->sdio_register[i].prepared = 0;
+ cmd->resp[1] = checksum << 24;
+ cmd->resp[0] = (rsp0 << 24)
+ | (rsp1 << 16)
+ | (rsp2 << 8)
+ | (rsp3 << 0);
+ return 1;
+ }
+ } else {
+ i += 1;
+ continue;
+ }
+ };
+ if (vub300->total_offload_count == 0)
+ return 0;
+ else if (vub300->fn[func].offload_count == 0)
+ return 0;
+ else
+ return examine_cyclic_buffer(vub300, cmd, func);
+}
+
+static void vub300_mmc_request(struct mmc_host *mmc, struct mmc_request *req)
+{ /* NOT irq */
+ struct mmc_command *cmd = req->cmd;
+ struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+ if (!vub300->interface) {
+ cmd->error = -ESHUTDOWN;
+ mmc_request_done(mmc, req);
+ return;
+ } else {
+ struct mmc_data *data = req->data;
+ if (!vub300->card_powered) {
+ cmd->error = -ENOMEDIUM;
+ mmc_request_done(mmc, req);
+ return;
+ }
+ if (!vub300->card_present) {
+ cmd->error = -ENOMEDIUM;
+ mmc_request_done(mmc, req);
+ return;
+ }
+ if (vub300->usb_transport_fail) {
+ cmd->error = vub300->usb_transport_fail;
+ mmc_request_done(mmc, req);
+ return;
+ }
+ if (!vub300->interface) {
+ cmd->error = -ENODEV;
+ mmc_request_done(mmc, req);
+ return;
+ }
+ kref_get(&vub300->kref);
+ mutex_lock(&vub300->cmd_mutex);
+ mod_timer(&vub300->inactivity_timer, jiffies + HZ);
+ /*
+ * for performance we have to return immediately
+ * if the requested data has been offloaded
+ */
+ if (cmd->opcode == 52 &&
+ satisfy_request_from_offloaded_data(vub300, cmd)) {
+ cmd->error = 0;
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+ mmc_request_done(mmc, req);
+ return;
+ } else {
+ vub300->cmd = cmd;
+ vub300->req = req;
+ vub300->data = data;
+ if (data)
+ vub300->datasize = data->blksz * data->blocks;
+ else
+ vub300->datasize = 0;
+ vub300_queue_cmnd_work(vub300);
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+ /*
+ * the kernel lock diagnostics complain
+ * if the cmd_mutex * is "passed on"
+ * to the cmndwork thread,
+ * so we must release it now
+ * and re-acquire it in the cmndwork thread
+ */
+ }
+ }
+}
+
+static void __set_clock_speed(struct vub300_mmc_host *vub300, u8 buf[8],
+ struct mmc_ios *ios)
+{
+ int buf_array_size = 8; /* ARRAY_SIZE(buf) does not work !!! */
+ int retval;
+ u32 kHzClock;
+ if (ios->clock >= 48000000)
+ kHzClock = 48000;
+ else if (ios->clock >= 24000000)
+ kHzClock = 24000;
+ else if (ios->clock >= 20000000)
+ kHzClock = 20000;
+ else if (ios->clock >= 15000000)
+ kHzClock = 15000;
+ else if (ios->clock >= 200000)
+ kHzClock = 200;
+ else
+ kHzClock = 0;
+ {
+ int i;
+ u64 c = kHzClock;
+ for (i = 0; i < buf_array_size; i++) {
+ buf[i] = c;
+ c >>= 8;
+ }
+ }
+ retval =
+ usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+ SET_CLOCK_SPEED,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x00, 0x00, buf, buf_array_size, HZ);
+ if (retval != 8) {
+ dev_err(&vub300->udev->dev, "SET_CLOCK_SPEED"
+ " %dkHz failed with retval=%d\n", kHzClock, retval);
+ } else {
+ dev_dbg(&vub300->udev->dev, "SET_CLOCK_SPEED"
+ " %dkHz\n", kHzClock);
+ }
+}
+
+static void vub300_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+ if (!vub300->interface)
+ return;
+ kref_get(&vub300->kref);
+ mutex_lock(&vub300->cmd_mutex);
+ if ((ios->power_mode == MMC_POWER_OFF) && vub300->card_powered) {
+ vub300->card_powered = 0;
+ usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+ SET_SD_POWER,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x0000, 0x0000, NULL, 0, HZ);
+ /* must wait for the VUB300 u-proc to boot up */
+ msleep(600);
+ } else if ((ios->power_mode == MMC_POWER_UP) && !vub300->card_powered) {
+ usb_control_msg(vub300->udev, usb_sndctrlpipe(vub300->udev, 0),
+ SET_SD_POWER,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x0001, 0x0000, NULL, 0, HZ);
+ msleep(600);
+ vub300->card_powered = 1;
+ } else if (ios->power_mode == MMC_POWER_ON) {
+ u8 *buf = kmalloc(8, GFP_KERNEL);
+ if (buf) {
+ __set_clock_speed(vub300, buf, ios);
+ kfree(buf);
+ }
+ } else {
+ /* this should mean no change of state */
+ }
+ mutex_unlock(&vub300->cmd_mutex);
+ kref_put(&vub300->kref, vub300_delete);
+}
+
+static int vub300_mmc_get_ro(struct mmc_host *mmc)
+{
+ struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+ return vub300->read_only;
+}
+
+static void vub300_enable_sdio_irq(struct mmc_host *mmc, int enable)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+ if (!vub300->interface)
+ return;
+ kref_get(&vub300->kref);
+ if (enable) {
+ mutex_lock(&vub300->irq_mutex);
+ if (vub300->irqs_queued) {
+ vub300->irqs_queued -= 1;
+ mmc_signal_sdio_irq(vub300->mmc);
+ } else if (vub300->irq_disabled) {
+ vub300->irq_disabled = 0;
+ vub300->irq_enabled = 1;
+ vub300_queue_poll_work(vub300, 0);
+ } else if (vub300->irq_enabled) {
+ /* this should not happen, so we will just ignore it */
+ } else {
+ vub300->irq_enabled = 1;
+ vub300_queue_poll_work(vub300, 0);
+ }
+ mutex_unlock(&vub300->irq_mutex);
+ } else {
+ vub300->irq_enabled = 0;
+ }
+ kref_put(&vub300->kref, vub300_delete);
+}
+
+void vub300_init_card(struct mmc_host *mmc, struct mmc_card *card)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = mmc_priv(mmc);
+ dev_info(&vub300->udev->dev, "NO host QUIRKS for this card\n");
+}
+
+static struct mmc_host_ops vub300_mmc_ops = {
+ .request = vub300_mmc_request,
+ .set_ios = vub300_mmc_set_ios,
+ .get_ro = vub300_mmc_get_ro,
+ .enable_sdio_irq = vub300_enable_sdio_irq,
+ .init_card = vub300_init_card,
+};
+
+static int vub300_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = NULL;
+ struct usb_host_interface *iface_desc;
+ struct usb_device *udev = usb_get_dev(interface_to_usbdev(interface));
+ int i;
+ int retval = -ENOMEM;
+ struct urb *command_out_urb;
+ struct urb *command_res_urb;
+ struct mmc_host *mmc;
+ char manufacturer[48];
+ char product[32];
+ char serial_number[32];
+ usb_string(udev, udev->descriptor.iManufacturer, manufacturer,
+ sizeof(manufacturer));
+ usb_string(udev, udev->descriptor.iProduct, product, sizeof(product));
+ usb_string(udev, udev->descriptor.iSerialNumber, serial_number,
+ sizeof(serial_number));
+ dev_info(&udev->dev, "probing VID:PID(%04X:%04X) %s %s %s\n",
+ udev->descriptor.idVendor, udev->descriptor.idProduct,
+ manufacturer, product, serial_number);
+ command_out_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!command_out_urb) {
+ retval = -ENOMEM;
+ dev_err(&vub300->udev->dev,
+ "not enough memory for the command_out_urb\n");
+ goto error0;
+ }
+ command_res_urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!command_res_urb) {
+ retval = -ENOMEM;
+ dev_err(&vub300->udev->dev,
+ "not enough memory for the command_res_urb\n");
+ goto error1;
+ }
+ /* this also allocates memory for our VUB300 mmc host device */
+ mmc = mmc_alloc_host(sizeof(struct vub300_mmc_host), &udev->dev);
+ if (!mmc) {
+ retval = -ENOMEM;
+ dev_err(&vub300->udev->dev,
+ "not enough memory for the mmc_host\n");
+ goto error4;
+ }
+ /* MMC core transfer sizes tunable parameters */
+ mmc->caps = 0;
+ if (!force_1_bit_data_xfers)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
+ if (!force_polling_for_irqs)
+ mmc->caps |= MMC_CAP_SDIO_IRQ;
+ mmc->caps &= ~MMC_CAP_NEEDS_POLL;
+ /*
+ * MMC_CAP_NEEDS_POLL causes core.c:mmc_rescan() to poll
+ * for devices which results in spurious CMD7's being
+ * issued which stops some SDIO cards from working
+ */
+ if (limit_speed_to_24_MHz) {
+ mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
+ mmc->caps |= MMC_CAP_SD_HIGHSPEED;
+ mmc->f_max = 24000000;
+ dev_info(&udev->dev, "limiting SDIO speed to 24_MHz\n");
+ } else {
+ mmc->caps |= MMC_CAP_MMC_HIGHSPEED;
+ mmc->caps |= MMC_CAP_SD_HIGHSPEED;
+ mmc->f_max = 48000000;
+ }
+ mmc->f_min = 200000;
+ mmc->max_blk_count = 511;
+ mmc->max_blk_size = 512;
+ mmc->max_segs = 128;
+ if (force_max_req_size)
+ mmc->max_req_size = force_max_req_size * 1024;
+ else
+ mmc->max_req_size = 64 * 1024;
+ mmc->max_seg_size = mmc->max_req_size;
+ mmc->ocr_avail = 0;
+ mmc->ocr_avail |= MMC_VDD_165_195;
+ mmc->ocr_avail |= MMC_VDD_20_21;
+ mmc->ocr_avail |= MMC_VDD_21_22;
+ mmc->ocr_avail |= MMC_VDD_22_23;
+ mmc->ocr_avail |= MMC_VDD_23_24;
+ mmc->ocr_avail |= MMC_VDD_24_25;
+ mmc->ocr_avail |= MMC_VDD_25_26;
+ mmc->ocr_avail |= MMC_VDD_26_27;
+ mmc->ocr_avail |= MMC_VDD_27_28;
+ mmc->ocr_avail |= MMC_VDD_28_29;
+ mmc->ocr_avail |= MMC_VDD_29_30;
+ mmc->ocr_avail |= MMC_VDD_30_31;
+ mmc->ocr_avail |= MMC_VDD_31_32;
+ mmc->ocr_avail |= MMC_VDD_32_33;
+ mmc->ocr_avail |= MMC_VDD_33_34;
+ mmc->ocr_avail |= MMC_VDD_34_35;
+ mmc->ocr_avail |= MMC_VDD_35_36;
+ mmc->ops = &vub300_mmc_ops;
+ vub300 = mmc_priv(mmc);
+ vub300->mmc = mmc;
+ vub300->card_powered = 0;
+ vub300->bus_width = 0;
+ vub300->cmnd.head.block_size[0] = 0x00;
+ vub300->cmnd.head.block_size[1] = 0x00;
+ vub300->app_spec = 0;
+ mutex_init(&vub300->cmd_mutex);
+ mutex_init(&vub300->irq_mutex);
+ vub300->command_out_urb = command_out_urb;
+ vub300->command_res_urb = command_res_urb;
+ vub300->usb_timed_out = 0;
+ vub300->dynamic_register_count = 0;
+
+ for (i = 0; i < ARRAY_SIZE(vub300->fn); i++) {
+ vub300->fn[i].offload_point = 0;
+ vub300->fn[i].offload_count = 0;
+ }
+
+ vub300->total_offload_count = 0;
+ vub300->irq_enabled = 0;
+ vub300->irq_disabled = 0;
+ vub300->irqs_queued = 0;
+
+ for (i = 0; i < ARRAY_SIZE(vub300->sdio_register); i++)
+ vub300->sdio_register[i++].activate = 0;
+
+ vub300->udev = udev;
+ vub300->interface = interface;
+ vub300->cmnd_res_ep = 0;
+ vub300->cmnd_out_ep = 0;
+ vub300->data_inp_ep = 0;
+ vub300->data_out_ep = 0;
+
+ for (i = 0; i < ARRAY_SIZE(vub300->fbs); i++)
+ vub300->fbs[i] = 512;
+
+ /*
+ * set up the endpoint information
+ *
+ * use the first pair of bulk-in and bulk-out
+ * endpoints for Command/Response+Interrupt
+ *
+ * use the second pair of bulk-in and bulk-out
+ * endpoints for Data In/Out
+ */
+ vub300->large_usb_packets = 0;
+ iface_desc = interface->cur_altsetting;
+ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+ struct usb_endpoint_descriptor *endpoint =
+ &iface_desc->endpoint[i].desc;
+ dev_info(&vub300->udev->dev,
+ "vub300 testing %s EndPoint(%d) %02X\n",
+ usb_endpoint_is_bulk_in(endpoint) ? "BULK IN" :
+ usb_endpoint_is_bulk_out(endpoint) ? "BULK OUT" :
+ "UNKNOWN", i, endpoint->bEndpointAddress);
+ if (endpoint->wMaxPacketSize > 64)
+ vub300->large_usb_packets = 1;
+ if (usb_endpoint_is_bulk_in(endpoint)) {
+ if (!vub300->cmnd_res_ep) {
+ vub300->cmnd_res_ep =
+ endpoint->bEndpointAddress;
+ } else if (!vub300->data_inp_ep) {
+ vub300->data_inp_ep =
+ endpoint->bEndpointAddress;
+ } else {
+ dev_warn(&vub300->udev->dev,
+ "ignoring"
+ " unexpected bulk_in endpoint");
+ }
+ } else if (usb_endpoint_is_bulk_out(endpoint)) {
+ if (!vub300->cmnd_out_ep) {
+ vub300->cmnd_out_ep =
+ endpoint->bEndpointAddress;
+ } else if (!vub300->data_out_ep) {
+ vub300->data_out_ep =
+ endpoint->bEndpointAddress;
+ } else {
+ dev_warn(&vub300->udev->dev,
+ "ignoring"
+ " unexpected bulk_out endpoint");
+ }
+ } else {
+ dev_warn(&vub300->udev->dev,
+ "vub300 ignoring EndPoint(%d) %02X", i,
+ endpoint->bEndpointAddress);
+ }
+ }
+ if (vub300->cmnd_res_ep && vub300->cmnd_out_ep &&
+ vub300->data_inp_ep && vub300->data_out_ep) {
+ dev_info(&vub300->udev->dev,
+ "vub300 %s packets"
+ " using EndPoints %02X %02X %02X %02X\n",
+ vub300->large_usb_packets ? "LARGE" : "SMALL",
+ vub300->cmnd_out_ep, vub300->cmnd_res_ep,
+ vub300->data_out_ep, vub300->data_inp_ep);
+ /* we have the expected EndPoints */
+ } else {
+ dev_err(&vub300->udev->dev,
+ "Could not find two sets of bulk-in/out endpoint pairs\n");
+ retval = -EINVAL;
+ goto error5;
+ }
+ retval =
+ usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+ GET_HC_INF0,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x0000, 0x0000, &vub300->hc_info,
+ sizeof(vub300->hc_info), HZ);
+ if (retval < 0)
+ goto error5;
+ retval =
+ usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+ SET_ROM_WAIT_STATES,
+ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ firmware_rom_wait_states, 0x0000, NULL, 0, HZ);
+ if (retval < 0)
+ goto error5;
+ dev_info(&vub300->udev->dev,
+ "operating_mode = %s %s %d MHz %s %d byte USB packets\n",
+ (mmc->caps & MMC_CAP_SDIO_IRQ) ? "IRQs" : "POLL",
+ (mmc->caps & MMC_CAP_4_BIT_DATA) ? "4-bit" : "1-bit",
+ mmc->f_max / 1000000,
+ pad_input_to_usb_pkt ? "padding input data to" : "with",
+ vub300->large_usb_packets ? 512 : 64);
+ retval =
+ usb_control_msg(vub300->udev, usb_rcvctrlpipe(vub300->udev, 0),
+ GET_SYSTEM_PORT_STATUS,
+ USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
+ 0x0000, 0x0000, &vub300->system_port_status,
+ sizeof(vub300->system_port_status), HZ);
+ if (retval < 0) {
+ goto error4;
+ } else if (sizeof(vub300->system_port_status) == retval) {
+ vub300->card_present =
+ (0x0001 & vub300->system_port_status.port_flags) ? 1 : 0;
+ vub300->read_only =
+ (0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
+ } else {
+ goto error4;
+ }
+ usb_set_intfdata(interface, vub300);
+ INIT_DELAYED_WORK(&vub300->pollwork, vub300_pollwork_thread);
+ INIT_WORK(&vub300->cmndwork, vub300_cmndwork_thread);
+ INIT_WORK(&vub300->deadwork, vub300_deadwork_thread);
+ kref_init(&vub300->kref);
+ init_timer(&vub300->sg_transfer_timer);
+ vub300->sg_transfer_timer.data = (unsigned long)vub300;
+ vub300->sg_transfer_timer.function = vub300_sg_timed_out;
+ kref_get(&vub300->kref);
+ init_timer(&vub300->inactivity_timer);
+ vub300->inactivity_timer.data = (unsigned long)vub300;
+ vub300->inactivity_timer.function = vub300_inactivity_timer_expired;
+ vub300->inactivity_timer.expires = jiffies + HZ;
+ add_timer(&vub300->inactivity_timer);
+ if (vub300->card_present)
+ dev_info(&vub300->udev->dev,
+ "USB vub300 remote SDIO host controller[%d]"
+ "connected with SD/SDIO card inserted\n",
+ interface_to_InterfaceNumber(interface));
+ else
+ dev_info(&vub300->udev->dev,
+ "USB vub300 remote SDIO host controller[%d]"
+ "connected with no SD/SDIO card inserted\n",
+ interface_to_InterfaceNumber(interface));
+ mmc_add_host(mmc);
+ return 0;
+error5:
+ mmc_free_host(mmc);
+ /*
+ * and hence also frees vub300
+ * which is contained at the end of struct mmc
+ */
+error4:
+ usb_free_urb(command_out_urb);
+error1:
+ usb_free_urb(command_res_urb);
+error0:
+ return retval;
+}
+
+static void vub300_disconnect(struct usb_interface *interface)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = usb_get_intfdata(interface);
+ if (!vub300 || !vub300->mmc) {
+ return;
+ } else {
+ struct mmc_host *mmc = vub300->mmc;
+ if (!vub300->mmc) {
+ return;
+ } else {
+ int ifnum = interface_to_InterfaceNumber(interface);
+ usb_set_intfdata(interface, NULL);
+ /* prevent more I/O from starting */
+ vub300->interface = NULL;
+ kref_put(&vub300->kref, vub300_delete);
+ mmc_remove_host(mmc);
+ pr_info("USB vub300 remote SDIO host controller[%d]"
+ " now disconnected", ifnum);
+ return;
+ }
+ }
+}
+
+#ifdef CONFIG_PM
+static int vub300_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+ if (!vub300 || !vub300->mmc) {
+ return 0;
+ } else {
+ struct mmc_host *mmc = vub300->mmc;
+ mmc_suspend_host(mmc);
+ return 0;
+ }
+}
+
+static int vub300_resume(struct usb_interface *intf)
+{
+ struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+ if (!vub300 || !vub300->mmc) {
+ return 0;
+ } else {
+ struct mmc_host *mmc = vub300->mmc;
+ mmc_resume_host(mmc);
+ return 0;
+ }
+}
+#else
+#define vub300_suspend NULL
+#define vub300_resume NULL
+#endif
+static int vub300_pre_reset(struct usb_interface *intf)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+ mutex_lock(&vub300->cmd_mutex);
+ return 0;
+}
+
+static int vub300_post_reset(struct usb_interface *intf)
+{ /* NOT irq */
+ struct vub300_mmc_host *vub300 = usb_get_intfdata(intf);
+ /* we are sure no URBs are active - no locking needed */
+ vub300->errors = -EPIPE;
+ mutex_unlock(&vub300->cmd_mutex);
+ return 0;
+}
+
+static struct usb_driver vub300_driver = {
+ .name = "vub300",
+ .probe = vub300_probe,
+ .disconnect = vub300_disconnect,
+ .suspend = vub300_suspend,
+ .resume = vub300_resume,
+ .pre_reset = vub300_pre_reset,
+ .post_reset = vub300_post_reset,
+ .id_table = vub300_table,
+ .supports_autosuspend = 1,
+};
+
+static int __init vub300_init(void)
+{ /* NOT irq */
+ int result;
+
+ pr_info("VUB300 Driver rom wait states = %02X irqpoll timeout = %04X",
+ firmware_rom_wait_states, 0x0FFFF & firmware_irqpoll_timeout);
+ cmndworkqueue = create_singlethread_workqueue("kvub300c");
+ if (!cmndworkqueue) {
+ pr_err("not enough memory for the REQUEST workqueue");
+ result = -ENOMEM;
+ goto out1;
+ }
+ pollworkqueue = create_singlethread_workqueue("kvub300p");
+ if (!pollworkqueue) {
+ pr_err("not enough memory for the IRQPOLL workqueue");
+ result = -ENOMEM;
+ goto out2;
+ }
+ deadworkqueue = create_singlethread_workqueue("kvub300d");
+ if (!deadworkqueue) {
+ pr_err("not enough memory for the EXPIRED workqueue");
+ result = -ENOMEM;
+ goto out3;
+ }
+ result = usb_register(&vub300_driver);
+ if (result) {
+ pr_err("usb_register failed. Error number %d", result);
+ goto out4;
+ }
+ return 0;
+out4:
+ destroy_workqueue(deadworkqueue);
+out3:
+ destroy_workqueue(pollworkqueue);
+out2:
+ destroy_workqueue(cmndworkqueue);
+out1:
+ return result;
+}
+
+static void __exit vub300_exit(void)
+{
+ usb_deregister(&vub300_driver);
+ flush_workqueue(cmndworkqueue);
+ flush_workqueue(pollworkqueue);
+ flush_workqueue(deadworkqueue);
+ destroy_workqueue(cmndworkqueue);
+ destroy_workqueue(pollworkqueue);
+ destroy_workqueue(deadworkqueue);
+}
+
+module_init(vub300_init);
+module_exit(vub300_exit);
+
+MODULE_AUTHOR("Tony Olech <tony.olech@elandigitalsystems.com>");
+MODULE_DESCRIPTION("VUB300 USB to SD/MMC/SDIO adapter driver");
+MODULE_LICENSE("GPL");
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff