+++ /dev/null
-/*
- * Intel Langwell USB OTG transceiver driver
- * Copyright (C) 2008 - 2010, Intel Corporation.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-/* This driver helps to switch Langwell OTG controller function between host
- * and peripheral. It works with EHCI driver and Langwell client controller
- * driver together.
- */
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/pci.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/kernel.h>
-#include <linux/device.h>
-#include <linux/moduleparam.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb.h>
-#include <linux/usb/otg.h>
-#include <linux/usb/hcd.h>
-#include <linux/notifier.h>
-#include <linux/delay.h>
-#include <asm/intel_scu_ipc.h>
-
-#include <linux/usb/langwell_otg.h>
-
-#define DRIVER_DESC "Intel Langwell USB OTG transceiver driver"
-#define DRIVER_VERSION "July 10, 2010"
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR("Henry Yuan <hang.yuan@intel.com>, Hao Wu <hao.wu@intel.com>");
-MODULE_VERSION(DRIVER_VERSION);
-MODULE_LICENSE("GPL");
-
-static const char driver_name[] = "langwell_otg";
-
-static int langwell_otg_probe(struct pci_dev *pdev,
- const struct pci_device_id *id);
-static void langwell_otg_remove(struct pci_dev *pdev);
-static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message);
-static int langwell_otg_resume(struct pci_dev *pdev);
-
-static int langwell_otg_set_host(struct otg_transceiver *otg,
- struct usb_bus *host);
-static int langwell_otg_set_peripheral(struct otg_transceiver *otg,
- struct usb_gadget *gadget);
-static int langwell_otg_start_srp(struct otg_transceiver *otg);
-
-static const struct pci_device_id pci_ids[] = {{
- .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe),
- .class_mask = ~0,
- .vendor = 0x8086,
- .device = 0x0811,
- .subvendor = PCI_ANY_ID,
- .subdevice = PCI_ANY_ID,
-}, { /* end: all zeroes */ }
-};
-
-static struct pci_driver otg_pci_driver = {
- .name = (char *) driver_name,
- .id_table = pci_ids,
-
- .probe = langwell_otg_probe,
- .remove = langwell_otg_remove,
-
- .suspend = langwell_otg_suspend,
- .resume = langwell_otg_resume,
-};
-
-/* HSM timers */
-static inline struct langwell_otg_timer *otg_timer_initializer
-(void (*function)(unsigned long), unsigned long expires, unsigned long data)
-{
- struct langwell_otg_timer *timer;
- timer = kmalloc(sizeof(struct langwell_otg_timer), GFP_KERNEL);
- if (timer == NULL)
- return timer;
-
- timer->function = function;
- timer->expires = expires;
- timer->data = data;
- return timer;
-}
-
-static struct langwell_otg_timer *a_wait_vrise_tmr, *a_aidl_bdis_tmr,
- *b_se0_srp_tmr, *b_srp_init_tmr;
-
-static struct list_head active_timers;
-
-static struct langwell_otg *the_transceiver;
-
-/* host/client notify transceiver when event affects HNP state */
-void langwell_update_transceiver(void)
-{
- struct langwell_otg *lnw = the_transceiver;
-
- dev_dbg(lnw->dev, "transceiver is updated\n");
-
- if (!lnw->qwork)
- return ;
-
- queue_work(lnw->qwork, &lnw->work);
-}
-EXPORT_SYMBOL(langwell_update_transceiver);
-
-static int langwell_otg_set_host(struct otg_transceiver *otg,
- struct usb_bus *host)
-{
- otg->host = host;
-
- return 0;
-}
-
-static int langwell_otg_set_peripheral(struct otg_transceiver *otg,
- struct usb_gadget *gadget)
-{
- otg->gadget = gadget;
-
- return 0;
-}
-
-static int langwell_otg_set_power(struct otg_transceiver *otg,
- unsigned mA)
-{
- return 0;
-}
-
-/* A-device drives vbus, controlled through IPC commands */
-static int langwell_otg_set_vbus(struct otg_transceiver *otg, bool enabled)
-{
- struct langwell_otg *lnw = the_transceiver;
- u8 sub_id;
-
- dev_dbg(lnw->dev, "%s <--- %s\n", __func__, enabled ? "on" : "off");
-
- if (enabled)
- sub_id = 0x8; /* Turn on the VBus */
- else
- sub_id = 0x9; /* Turn off the VBus */
-
- if (intel_scu_ipc_simple_command(0xef, sub_id)) {
- dev_dbg(lnw->dev, "Failed to set Vbus via IPC commands\n");
- return -EBUSY;
- }
-
- dev_dbg(lnw->dev, "%s --->\n", __func__);
-
- return 0;
-}
-
-/* charge vbus or discharge vbus through a resistor to ground */
-static void langwell_otg_chrg_vbus(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- u32 val;
-
- val = readl(lnw->iotg.base + CI_OTGSC);
-
- if (on)
- writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VC,
- lnw->iotg.base + CI_OTGSC);
- else
- writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_VD,
- lnw->iotg.base + CI_OTGSC);
-}
-
-/* Start SRP */
-static int langwell_otg_start_srp(struct otg_transceiver *otg)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val;
-
- dev_dbg(lnw->dev, "%s --->\n", __func__);
-
- val = readl(iotg->base + CI_OTGSC);
-
- writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HADP,
- iotg->base + CI_OTGSC);
-
- /* Check if the data plus is finished or not */
- msleep(8);
- val = readl(iotg->base + CI_OTGSC);
- if (val & (OTGSC_HADP | OTGSC_DP))
- dev_dbg(lnw->dev, "DataLine SRP Error\n");
-
- /* Disable interrupt - b_sess_vld */
- val = readl(iotg->base + CI_OTGSC);
- val &= (~(OTGSC_BSVIE | OTGSC_BSEIE));
- writel(val, iotg->base + CI_OTGSC);
-
- /* Start VBus SRP, drive vbus to generate VBus pulse */
- iotg->otg.set_vbus(&iotg->otg, true);
- msleep(15);
- iotg->otg.set_vbus(&iotg->otg, false);
-
- /* Enable interrupt - b_sess_vld*/
- val = readl(iotg->base + CI_OTGSC);
- dev_dbg(lnw->dev, "after VBUS pulse otgsc = %x\n", val);
-
- val |= (OTGSC_BSVIE | OTGSC_BSEIE);
- writel(val, iotg->base + CI_OTGSC);
-
- /* If Vbus is valid, then update the hsm */
- if (val & OTGSC_BSV) {
- dev_dbg(lnw->dev, "no b_sess_vld interrupt\n");
-
- lnw->iotg.hsm.b_sess_vld = 1;
- langwell_update_transceiver();
- }
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
- return 0;
-}
-
-/* stop SOF via bus_suspend */
-static void langwell_otg_loc_sof(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct usb_hcd *hcd;
- int err;
-
- dev_dbg(lnw->dev, "%s ---> %s\n", __func__, on ? "suspend" : "resume");
-
- hcd = bus_to_hcd(lnw->iotg.otg.host);
- if (on)
- err = hcd->driver->bus_resume(hcd);
- else
- err = hcd->driver->bus_suspend(hcd);
-
- if (err)
- dev_dbg(lnw->dev, "Fail to resume/suspend USB bus - %d\n", err);
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
-}
-
-static int langwell_otg_check_otgsc(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- u32 otgsc, usbcfg;
-
- dev_dbg(lnw->dev, "check sync OTGSC and USBCFG registers\n");
-
- otgsc = readl(lnw->iotg.base + CI_OTGSC);
- usbcfg = readl(lnw->usbcfg);
-
- dev_dbg(lnw->dev, "OTGSC = %08x, USBCFG = %08x\n",
- otgsc, usbcfg);
- dev_dbg(lnw->dev, "OTGSC_AVV = %d\n", !!(otgsc & OTGSC_AVV));
- dev_dbg(lnw->dev, "USBCFG.VBUSVAL = %d\n",
- !!(usbcfg & USBCFG_VBUSVAL));
- dev_dbg(lnw->dev, "OTGSC_ASV = %d\n", !!(otgsc & OTGSC_ASV));
- dev_dbg(lnw->dev, "USBCFG.AVALID = %d\n",
- !!(usbcfg & USBCFG_AVALID));
- dev_dbg(lnw->dev, "OTGSC_BSV = %d\n", !!(otgsc & OTGSC_BSV));
- dev_dbg(lnw->dev, "USBCFG.BVALID = %d\n",
- !!(usbcfg & USBCFG_BVALID));
- dev_dbg(lnw->dev, "OTGSC_BSE = %d\n", !!(otgsc & OTGSC_BSE));
- dev_dbg(lnw->dev, "USBCFG.SESEND = %d\n",
- !!(usbcfg & USBCFG_SESEND));
-
- /* Check USBCFG VBusValid/AValid/BValid/SessEnd */
- if (!!(otgsc & OTGSC_AVV) ^ !!(usbcfg & USBCFG_VBUSVAL)) {
- dev_dbg(lnw->dev, "OTGSC.AVV != USBCFG.VBUSVAL\n");
- goto err;
- }
- if (!!(otgsc & OTGSC_ASV) ^ !!(usbcfg & USBCFG_AVALID)) {
- dev_dbg(lnw->dev, "OTGSC.ASV != USBCFG.AVALID\n");
- goto err;
- }
- if (!!(otgsc & OTGSC_BSV) ^ !!(usbcfg & USBCFG_BVALID)) {
- dev_dbg(lnw->dev, "OTGSC.BSV != USBCFG.BVALID\n");
- goto err;
- }
- if (!!(otgsc & OTGSC_BSE) ^ !!(usbcfg & USBCFG_SESEND)) {
- dev_dbg(lnw->dev, "OTGSC.BSE != USBCFG.SESSEN\n");
- goto err;
- }
-
- dev_dbg(lnw->dev, "OTGSC and USBCFG are synced\n");
-
- return 0;
-
-err:
- dev_warn(lnw->dev, "OTGSC isn't equal to USBCFG\n");
- return -EPIPE;
-}
-
-
-static void langwell_otg_phy_low_power(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u8 val, phcd;
- int retval;
-
- dev_dbg(lnw->dev, "%s ---> %s mode\n",
- __func__, on ? "Low power" : "Normal");
-
- phcd = 0x40;
-
- val = readb(iotg->base + CI_HOSTPC1 + 2);
-
- if (on) {
- /* Due to hardware issue, after set PHCD, sync will failed
- * between USBCFG and OTGSC, so before set PHCD, check if
- * sync is in process now. If the answer is "yes", then do
- * not touch PHCD bit */
- retval = langwell_otg_check_otgsc();
- if (retval) {
- dev_dbg(lnw->dev, "Skip PHCD programming..\n");
- return ;
- }
-
- writeb(val | phcd, iotg->base + CI_HOSTPC1 + 2);
- } else
- writeb(val & ~phcd, iotg->base + CI_HOSTPC1 + 2);
-
- dev_dbg(lnw->dev, "%s <--- done\n", __func__);
-}
-
-/* After drv vbus, add 5 ms delay to set PHCD */
-static void langwell_otg_phy_low_power_wait(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
-
- dev_dbg(lnw->dev, "add 5ms delay before programing PHCD\n");
-
- mdelay(5);
- langwell_otg_phy_low_power(on);
-}
-
-/* Enable/Disable OTG interrupt */
-static void langwell_otg_intr(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val;
-
- dev_dbg(lnw->dev, "%s ---> %s\n", __func__, on ? "on" : "off");
-
- val = readl(iotg->base + CI_OTGSC);
-
- /* OTGSC_INT_MASK doesn't contains 1msInt */
- if (on) {
- val = val | (OTGSC_INT_MASK);
- writel(val, iotg->base + CI_OTGSC);
- } else {
- val = val & ~(OTGSC_INT_MASK);
- writel(val, iotg->base + CI_OTGSC);
- }
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
-}
-
-/* set HAAR: Hardware Assist Auto-Reset */
-static void langwell_otg_HAAR(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val;
-
- dev_dbg(lnw->dev, "%s ---> %s\n", __func__, on ? "on" : "off");
-
- val = readl(iotg->base + CI_OTGSC);
- if (on)
- writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HAAR,
- iotg->base + CI_OTGSC);
- else
- writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HAAR,
- iotg->base + CI_OTGSC);
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
-}
-
-/* set HABA: Hardware Assist B-Disconnect to A-Connect */
-static void langwell_otg_HABA(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val;
-
- dev_dbg(lnw->dev, "%s ---> %s\n", __func__, on ? "on" : "off");
-
- val = readl(iotg->base + CI_OTGSC);
- if (on)
- writel((val & ~OTGSC_INTSTS_MASK) | OTGSC_HABA,
- iotg->base + CI_OTGSC);
- else
- writel((val & ~OTGSC_INTSTS_MASK) & ~OTGSC_HABA,
- iotg->base + CI_OTGSC);
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
-}
-
-static int langwell_otg_check_se0_srp(int on)
-{
- struct langwell_otg *lnw = the_transceiver;
- int delay_time = TB_SE0_SRP * 10;
- u32 val;
-
- dev_dbg(lnw->dev, "%s --->\n", __func__);
-
- do {
- udelay(100);
- if (!delay_time--)
- break;
- val = readl(lnw->iotg.base + CI_PORTSC1);
- val &= PORTSC_LS;
- } while (!val);
-
- dev_dbg(lnw->dev, "%s <---\n", __func__);
- return val;
-}
-
-/* The timeout callback function to set time out bit */
-static void set_tmout(unsigned long indicator)
-{
- *(int *)indicator = 1;
-}
-
-void langwell_otg_nsf_msg(unsigned long indicator)
-{
- struct langwell_otg *lnw = the_transceiver;
-
- switch (indicator) {
- case 2:
- case 4:
- case 6:
- case 7:
- dev_warn(lnw->dev,
- "OTG:NSF-%lu - deivce not responding\n", indicator);
- break;
- case 3:
- dev_warn(lnw->dev,
- "OTG:NSF-%lu - deivce not supported\n", indicator);
- break;
- default:
- dev_warn(lnw->dev, "Do not have this kind of NSF\n");
- break;
- }
-}
-
-/* Initialize timers */
-static int langwell_otg_init_timers(struct otg_hsm *hsm)
-{
- /* HSM used timers */
- a_wait_vrise_tmr = otg_timer_initializer(&set_tmout, TA_WAIT_VRISE,
- (unsigned long)&hsm->a_wait_vrise_tmout);
- if (a_wait_vrise_tmr == NULL)
- return -ENOMEM;
- a_aidl_bdis_tmr = otg_timer_initializer(&set_tmout, TA_AIDL_BDIS,
- (unsigned long)&hsm->a_aidl_bdis_tmout);
- if (a_aidl_bdis_tmr == NULL)
- return -ENOMEM;
- b_se0_srp_tmr = otg_timer_initializer(&set_tmout, TB_SE0_SRP,
- (unsigned long)&hsm->b_se0_srp);
- if (b_se0_srp_tmr == NULL)
- return -ENOMEM;
- b_srp_init_tmr = otg_timer_initializer(&set_tmout, TB_SRP_INIT,
- (unsigned long)&hsm->b_srp_init_tmout);
- if (b_srp_init_tmr == NULL)
- return -ENOMEM;
-
- return 0;
-}
-
-/* Free timers */
-static void langwell_otg_free_timers(void)
-{
- kfree(a_wait_vrise_tmr);
- kfree(a_aidl_bdis_tmr);
- kfree(b_se0_srp_tmr);
- kfree(b_srp_init_tmr);
-}
-
-/* The timeout callback function to set time out bit */
-static void langwell_otg_timer_fn(unsigned long indicator)
-{
- struct langwell_otg *lnw = the_transceiver;
-
- *(int *)indicator = 1;
-
- dev_dbg(lnw->dev, "kernel timer - timeout\n");
-
- langwell_update_transceiver();
-}
-
-/* kernel timer used instead of HW based interrupt */
-static void langwell_otg_add_ktimer(enum langwell_otg_timer_type timers)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- unsigned long j = jiffies;
- unsigned long data, time;
-
- switch (timers) {
- case TA_WAIT_VRISE_TMR:
- iotg->hsm.a_wait_vrise_tmout = 0;
- data = (unsigned long)&iotg->hsm.a_wait_vrise_tmout;
- time = TA_WAIT_VRISE;
- break;
- case TA_WAIT_BCON_TMR:
- iotg->hsm.a_wait_bcon_tmout = 0;
- data = (unsigned long)&iotg->hsm.a_wait_bcon_tmout;
- time = TA_WAIT_BCON;
- break;
- case TA_AIDL_BDIS_TMR:
- iotg->hsm.a_aidl_bdis_tmout = 0;
- data = (unsigned long)&iotg->hsm.a_aidl_bdis_tmout;
- time = TA_AIDL_BDIS;
- break;
- case TB_ASE0_BRST_TMR:
- iotg->hsm.b_ase0_brst_tmout = 0;
- data = (unsigned long)&iotg->hsm.b_ase0_brst_tmout;
- time = TB_ASE0_BRST;
- break;
- case TB_SRP_INIT_TMR:
- iotg->hsm.b_srp_init_tmout = 0;
- data = (unsigned long)&iotg->hsm.b_srp_init_tmout;
- time = TB_SRP_INIT;
- break;
- case TB_SRP_FAIL_TMR:
- iotg->hsm.b_srp_fail_tmout = 0;
- data = (unsigned long)&iotg->hsm.b_srp_fail_tmout;
- time = TB_SRP_FAIL;
- break;
- case TB_BUS_SUSPEND_TMR:
- iotg->hsm.b_bus_suspend_tmout = 0;
- data = (unsigned long)&iotg->hsm.b_bus_suspend_tmout;
- time = TB_BUS_SUSPEND;
- break;
- default:
- dev_dbg(lnw->dev, "unknown timer, cannot enable it\n");
- return;
- }
-
- lnw->hsm_timer.data = data;
- lnw->hsm_timer.function = langwell_otg_timer_fn;
- lnw->hsm_timer.expires = j + time * HZ / 1000; /* milliseconds */
-
- add_timer(&lnw->hsm_timer);
-
- dev_dbg(lnw->dev, "add timer successfully\n");
-}
-
-/* Add timer to timer list */
-static void langwell_otg_add_timer(void *gtimer)
-{
- struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer;
- struct langwell_otg_timer *tmp_timer;
- struct intel_mid_otg_xceiv *iotg = &the_transceiver->iotg;
- u32 val32;
-
- /* Check if the timer is already in the active list,
- * if so update timer count
- */
- list_for_each_entry(tmp_timer, &active_timers, list)
- if (tmp_timer == timer) {
- timer->count = timer->expires;
- return;
- }
- timer->count = timer->expires;
-
- if (list_empty(&active_timers)) {
- val32 = readl(iotg->base + CI_OTGSC);
- writel(val32 | OTGSC_1MSE, iotg->base + CI_OTGSC);
- }
-
- list_add_tail(&timer->list, &active_timers);
-}
-
-/* Remove timer from the timer list; clear timeout status */
-static void langwell_otg_del_timer(void *gtimer)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct langwell_otg_timer *timer = (struct langwell_otg_timer *)gtimer;
- struct langwell_otg_timer *tmp_timer, *del_tmp;
- u32 val32;
-
- list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list)
- if (tmp_timer == timer)
- list_del(&timer->list);
-
- if (list_empty(&active_timers)) {
- val32 = readl(lnw->iotg.base + CI_OTGSC);
- writel(val32 & ~OTGSC_1MSE, lnw->iotg.base + CI_OTGSC);
- }
-}
-
-/* Reduce timer count by 1, and find timeout conditions.*/
-static int langwell_otg_tick_timer(u32 *int_sts)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct langwell_otg_timer *tmp_timer, *del_tmp;
- int expired = 0;
-
- list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
- tmp_timer->count--;
- /* check if timer expires */
- if (!tmp_timer->count) {
- list_del(&tmp_timer->list);
- tmp_timer->function(tmp_timer->data);
- expired = 1;
- }
- }
-
- if (list_empty(&active_timers)) {
- dev_dbg(lnw->dev, "tick timer: disable 1ms int\n");
- *int_sts = *int_sts & ~OTGSC_1MSE;
- }
- return expired;
-}
-
-static void reset_otg(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- int delay_time = 1000;
- u32 val;
-
- dev_dbg(lnw->dev, "reseting OTG controller ...\n");
- val = readl(lnw->iotg.base + CI_USBCMD);
- writel(val | USBCMD_RST, lnw->iotg.base + CI_USBCMD);
- do {
- udelay(100);
- if (!delay_time--)
- dev_dbg(lnw->dev, "reset timeout\n");
- val = readl(lnw->iotg.base + CI_USBCMD);
- val &= USBCMD_RST;
- } while (val != 0);
- dev_dbg(lnw->dev, "reset done.\n");
-}
-
-static void set_host_mode(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- u32 val;
-
- reset_otg();
- val = readl(lnw->iotg.base + CI_USBMODE);
- val = (val & (~USBMODE_CM)) | USBMODE_HOST;
- writel(val, lnw->iotg.base + CI_USBMODE);
-}
-
-static void set_client_mode(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- u32 val;
-
- reset_otg();
- val = readl(lnw->iotg.base + CI_USBMODE);
- val = (val & (~USBMODE_CM)) | USBMODE_DEVICE;
- writel(val, lnw->iotg.base + CI_USBMODE);
-}
-
-static void init_hsm(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val32;
-
- /* read OTGSC after reset */
- val32 = readl(lnw->iotg.base + CI_OTGSC);
- dev_dbg(lnw->dev, "%s: OTGSC init value = 0x%x\n", __func__, val32);
-
- /* set init state */
- if (val32 & OTGSC_ID) {
- iotg->hsm.id = 1;
- iotg->otg.default_a = 0;
- set_client_mode();
- iotg->otg.state = OTG_STATE_B_IDLE;
- } else {
- iotg->hsm.id = 0;
- iotg->otg.default_a = 1;
- set_host_mode();
- iotg->otg.state = OTG_STATE_A_IDLE;
- }
-
- /* set session indicator */
- if (val32 & OTGSC_BSE)
- iotg->hsm.b_sess_end = 1;
- if (val32 & OTGSC_BSV)
- iotg->hsm.b_sess_vld = 1;
- if (val32 & OTGSC_ASV)
- iotg->hsm.a_sess_vld = 1;
- if (val32 & OTGSC_AVV)
- iotg->hsm.a_vbus_vld = 1;
-
- /* defautly power the bus */
- iotg->hsm.a_bus_req = 1;
- iotg->hsm.a_bus_drop = 0;
- /* defautly don't request bus as B device */
- iotg->hsm.b_bus_req = 0;
- /* no system error */
- iotg->hsm.a_clr_err = 0;
-
- langwell_otg_phy_low_power_wait(1);
-}
-
-static void update_hsm(void)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 val32;
-
- /* read OTGSC */
- val32 = readl(lnw->iotg.base + CI_OTGSC);
- dev_dbg(lnw->dev, "%s: OTGSC value = 0x%x\n", __func__, val32);
-
- iotg->hsm.id = !!(val32 & OTGSC_ID);
- iotg->hsm.b_sess_end = !!(val32 & OTGSC_BSE);
- iotg->hsm.b_sess_vld = !!(val32 & OTGSC_BSV);
- iotg->hsm.a_sess_vld = !!(val32 & OTGSC_ASV);
- iotg->hsm.a_vbus_vld = !!(val32 & OTGSC_AVV);
-}
-
-static irqreturn_t otg_dummy_irq(int irq, void *_dev)
-{
- struct langwell_otg *lnw = the_transceiver;
- void __iomem *reg_base = _dev;
- u32 val;
- u32 int_mask = 0;
-
- val = readl(reg_base + CI_USBMODE);
- if ((val & USBMODE_CM) != USBMODE_DEVICE)
- return IRQ_NONE;
-
- val = readl(reg_base + CI_USBSTS);
- int_mask = val & INTR_DUMMY_MASK;
-
- if (int_mask == 0)
- return IRQ_NONE;
-
- /* clear hsm.b_conn here since host driver can't detect it
- * otg_dummy_irq called means B-disconnect happened.
- */
- if (lnw->iotg.hsm.b_conn) {
- lnw->iotg.hsm.b_conn = 0;
- if (spin_trylock(&lnw->wq_lock)) {
- langwell_update_transceiver();
- spin_unlock(&lnw->wq_lock);
- }
- }
-
- /* Clear interrupts */
- writel(int_mask, reg_base + CI_USBSTS);
- return IRQ_HANDLED;
-}
-
-static irqreturn_t otg_irq(int irq, void *_dev)
-{
- struct langwell_otg *lnw = _dev;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- u32 int_sts, int_en;
- u32 int_mask = 0;
- int flag = 0;
-
- int_sts = readl(lnw->iotg.base + CI_OTGSC);
- int_en = (int_sts & OTGSC_INTEN_MASK) >> 8;
- int_mask = int_sts & int_en;
- if (int_mask == 0)
- return IRQ_NONE;
-
- if (int_mask & OTGSC_IDIS) {
- dev_dbg(lnw->dev, "%s: id change int\n", __func__);
- iotg->hsm.id = (int_sts & OTGSC_ID) ? 1 : 0;
- dev_dbg(lnw->dev, "id = %d\n", iotg->hsm.id);
- flag = 1;
- }
- if (int_mask & OTGSC_DPIS) {
- dev_dbg(lnw->dev, "%s: data pulse int\n", __func__);
- iotg->hsm.a_srp_det = (int_sts & OTGSC_DPS) ? 1 : 0;
- dev_dbg(lnw->dev, "data pulse = %d\n", iotg->hsm.a_srp_det);
- flag = 1;
- }
- if (int_mask & OTGSC_BSEIS) {
- dev_dbg(lnw->dev, "%s: b session end int\n", __func__);
- iotg->hsm.b_sess_end = (int_sts & OTGSC_BSE) ? 1 : 0;
- dev_dbg(lnw->dev, "b_sess_end = %d\n", iotg->hsm.b_sess_end);
- flag = 1;
- }
- if (int_mask & OTGSC_BSVIS) {
- dev_dbg(lnw->dev, "%s: b session valid int\n", __func__);
- iotg->hsm.b_sess_vld = (int_sts & OTGSC_BSV) ? 1 : 0;
- dev_dbg(lnw->dev, "b_sess_vld = %d\n", iotg->hsm.b_sess_end);
- flag = 1;
- }
- if (int_mask & OTGSC_ASVIS) {
- dev_dbg(lnw->dev, "%s: a session valid int\n", __func__);
- iotg->hsm.a_sess_vld = (int_sts & OTGSC_ASV) ? 1 : 0;
- dev_dbg(lnw->dev, "a_sess_vld = %d\n", iotg->hsm.a_sess_vld);
- flag = 1;
- }
- if (int_mask & OTGSC_AVVIS) {
- dev_dbg(lnw->dev, "%s: a vbus valid int\n", __func__);
- iotg->hsm.a_vbus_vld = (int_sts & OTGSC_AVV) ? 1 : 0;
- dev_dbg(lnw->dev, "a_vbus_vld = %d\n", iotg->hsm.a_vbus_vld);
- flag = 1;
- }
-
- if (int_mask & OTGSC_1MSS) {
- /* need to schedule otg_work if any timer is expired */
- if (langwell_otg_tick_timer(&int_sts))
- flag = 1;
- }
-
- writel((int_sts & ~OTGSC_INTSTS_MASK) | int_mask,
- lnw->iotg.base + CI_OTGSC);
- if (flag)
- langwell_update_transceiver();
-
- return IRQ_HANDLED;
-}
-
-static int langwell_otg_iotg_notify(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = data;
- int flag = 0;
-
- if (iotg == NULL)
- return NOTIFY_BAD;
-
- if (lnw == NULL)
- return NOTIFY_BAD;
-
- switch (action) {
- case MID_OTG_NOTIFY_CONNECT:
- dev_dbg(lnw->dev, "Lnw OTG Notify Connect Event\n");
- if (iotg->otg.default_a == 1)
- iotg->hsm.b_conn = 1;
- else
- iotg->hsm.a_conn = 1;
- flag = 1;
- break;
- case MID_OTG_NOTIFY_DISCONN:
- dev_dbg(lnw->dev, "Lnw OTG Notify Disconnect Event\n");
- if (iotg->otg.default_a == 1)
- iotg->hsm.b_conn = 0;
- else
- iotg->hsm.a_conn = 0;
- flag = 1;
- break;
- case MID_OTG_NOTIFY_HSUSPEND:
- dev_dbg(lnw->dev, "Lnw OTG Notify Host Bus suspend Event\n");
- if (iotg->otg.default_a == 1)
- iotg->hsm.a_suspend_req = 1;
- else
- iotg->hsm.b_bus_req = 0;
- flag = 1;
- break;
- case MID_OTG_NOTIFY_HRESUME:
- dev_dbg(lnw->dev, "Lnw OTG Notify Host Bus resume Event\n");
- if (iotg->otg.default_a == 1)
- iotg->hsm.b_bus_resume = 1;
- flag = 1;
- break;
- case MID_OTG_NOTIFY_CSUSPEND:
- dev_dbg(lnw->dev, "Lnw OTG Notify Client Bus suspend Event\n");
- if (iotg->otg.default_a == 1) {
- if (iotg->hsm.b_bus_suspend_vld == 2) {
- iotg->hsm.b_bus_suspend = 1;
- iotg->hsm.b_bus_suspend_vld = 0;
- flag = 1;
- } else {
- iotg->hsm.b_bus_suspend_vld++;
- flag = 0;
- }
- } else {
- if (iotg->hsm.a_bus_suspend == 0) {
- iotg->hsm.a_bus_suspend = 1;
- flag = 1;
- }
- }
- break;
- case MID_OTG_NOTIFY_CRESUME:
- dev_dbg(lnw->dev, "Lnw OTG Notify Client Bus resume Event\n");
- if (iotg->otg.default_a == 0)
- iotg->hsm.a_bus_suspend = 0;
- flag = 0;
- break;
- case MID_OTG_NOTIFY_HOSTADD:
- dev_dbg(lnw->dev, "Lnw OTG Nofity Host Driver Add\n");
- flag = 1;
- break;
- case MID_OTG_NOTIFY_HOSTREMOVE:
- dev_dbg(lnw->dev, "Lnw OTG Nofity Host Driver remove\n");
- flag = 1;
- break;
- case MID_OTG_NOTIFY_CLIENTADD:
- dev_dbg(lnw->dev, "Lnw OTG Nofity Client Driver Add\n");
- flag = 1;
- break;
- case MID_OTG_NOTIFY_CLIENTREMOVE:
- dev_dbg(lnw->dev, "Lnw OTG Nofity Client Driver remove\n");
- flag = 1;
- break;
- default:
- dev_dbg(lnw->dev, "Lnw OTG Nofity unknown notify message\n");
- return NOTIFY_DONE;
- }
-
- if (flag)
- langwell_update_transceiver();
-
- return NOTIFY_OK;
-}
-
-static void langwell_otg_work(struct work_struct *work)
-{
- struct langwell_otg *lnw;
- struct intel_mid_otg_xceiv *iotg;
- int retval;
- struct pci_dev *pdev;
-
- lnw = container_of(work, struct langwell_otg, work);
- iotg = &lnw->iotg;
- pdev = to_pci_dev(lnw->dev);
-
- dev_dbg(lnw->dev, "%s: old state = %s\n", __func__,
- otg_state_string(iotg->otg.state));
-
- switch (iotg->otg.state) {
- case OTG_STATE_UNDEFINED:
- case OTG_STATE_B_IDLE:
- if (!iotg->hsm.id) {
- langwell_otg_del_timer(b_srp_init_tmr);
- del_timer_sync(&lnw->hsm_timer);
-
- iotg->otg.default_a = 1;
- iotg->hsm.a_srp_det = 0;
-
- langwell_otg_chrg_vbus(0);
- set_host_mode();
- langwell_otg_phy_low_power(1);
-
- iotg->otg.state = OTG_STATE_A_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.b_sess_vld) {
- langwell_otg_del_timer(b_srp_init_tmr);
- del_timer_sync(&lnw->hsm_timer);
- iotg->hsm.b_sess_end = 0;
- iotg->hsm.a_bus_suspend = 0;
- langwell_otg_chrg_vbus(0);
-
- if (lnw->iotg.start_peripheral) {
- lnw->iotg.start_peripheral(&lnw->iotg);
- iotg->otg.state = OTG_STATE_B_PERIPHERAL;
- } else
- dev_dbg(lnw->dev, "client driver not loaded\n");
-
- } else if (iotg->hsm.b_srp_init_tmout) {
- iotg->hsm.b_srp_init_tmout = 0;
- dev_warn(lnw->dev, "SRP init timeout\n");
- } else if (iotg->hsm.b_srp_fail_tmout) {
- iotg->hsm.b_srp_fail_tmout = 0;
- iotg->hsm.b_bus_req = 0;
-
- /* No silence failure */
- langwell_otg_nsf_msg(6);
- } else if (iotg->hsm.b_bus_req && iotg->hsm.b_sess_end) {
- del_timer_sync(&lnw->hsm_timer);
- /* workaround for b_se0_srp detection */
- retval = langwell_otg_check_se0_srp(0);
- if (retval) {
- iotg->hsm.b_bus_req = 0;
- dev_dbg(lnw->dev, "LS isn't SE0, try later\n");
- } else {
- /* clear the PHCD before start srp */
- langwell_otg_phy_low_power(0);
-
- /* Start SRP */
- langwell_otg_add_timer(b_srp_init_tmr);
- iotg->otg.start_srp(&iotg->otg);
- langwell_otg_del_timer(b_srp_init_tmr);
- langwell_otg_add_ktimer(TB_SRP_FAIL_TMR);
-
- /* reset PHY low power mode here */
- langwell_otg_phy_low_power_wait(1);
- }
- }
- break;
- case OTG_STATE_B_SRP_INIT:
- if (!iotg->hsm.id) {
- iotg->otg.default_a = 1;
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_chrg_vbus(0);
- set_host_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_A_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.b_sess_vld) {
- langwell_otg_chrg_vbus(0);
- if (lnw->iotg.start_peripheral) {
- lnw->iotg.start_peripheral(&lnw->iotg);
- iotg->otg.state = OTG_STATE_B_PERIPHERAL;
- } else
- dev_dbg(lnw->dev, "client driver not loaded\n");
- }
- break;
- case OTG_STATE_B_PERIPHERAL:
- if (!iotg->hsm.id) {
- iotg->otg.default_a = 1;
- iotg->hsm.a_srp_det = 0;
-
- langwell_otg_chrg_vbus(0);
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- set_host_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_A_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.b_sess_vld) {
- iotg->hsm.b_hnp_enable = 0;
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- iotg->otg.state = OTG_STATE_B_IDLE;
- } else if (iotg->hsm.b_bus_req && iotg->otg.gadget &&
- iotg->otg.gadget->b_hnp_enable &&
- iotg->hsm.a_bus_suspend) {
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- langwell_otg_HAAR(1);
- iotg->hsm.a_conn = 0;
-
- if (lnw->iotg.start_host) {
- lnw->iotg.start_host(&lnw->iotg);
- iotg->otg.state = OTG_STATE_B_WAIT_ACON;
- } else
- dev_dbg(lnw->dev,
- "host driver not loaded.\n");
-
- iotg->hsm.a_bus_resume = 0;
- langwell_otg_add_ktimer(TB_ASE0_BRST_TMR);
- }
- break;
-
- case OTG_STATE_B_WAIT_ACON:
- if (!iotg->hsm.id) {
- /* delete hsm timer for b_ase0_brst_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- iotg->otg.default_a = 1;
- iotg->hsm.a_srp_det = 0;
-
- langwell_otg_chrg_vbus(0);
-
- langwell_otg_HAAR(0);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- set_host_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_A_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.b_sess_vld) {
- /* delete hsm timer for b_ase0_brst_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- iotg->hsm.b_hnp_enable = 0;
- iotg->hsm.b_bus_req = 0;
-
- langwell_otg_chrg_vbus(0);
- langwell_otg_HAAR(0);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- } else if (iotg->hsm.a_conn) {
- /* delete hsm timer for b_ase0_brst_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- langwell_otg_HAAR(0);
- iotg->otg.state = OTG_STATE_B_HOST;
- langwell_update_transceiver();
- } else if (iotg->hsm.a_bus_resume ||
- iotg->hsm.b_ase0_brst_tmout) {
- /* delete hsm timer for b_ase0_brst_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- langwell_otg_HAAR(0);
- langwell_otg_nsf_msg(7);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- iotg->hsm.a_bus_suspend = 0;
- iotg->hsm.b_bus_req = 0;
-
- if (lnw->iotg.start_peripheral)
- lnw->iotg.start_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver not loaded.\n");
-
- iotg->otg.state = OTG_STATE_B_PERIPHERAL;
- }
- break;
-
- case OTG_STATE_B_HOST:
- if (!iotg->hsm.id) {
- iotg->otg.default_a = 1;
- iotg->hsm.a_srp_det = 0;
-
- langwell_otg_chrg_vbus(0);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- set_host_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_A_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.b_sess_vld) {
- iotg->hsm.b_hnp_enable = 0;
- iotg->hsm.b_bus_req = 0;
-
- langwell_otg_chrg_vbus(0);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- } else if ((!iotg->hsm.b_bus_req) ||
- (!iotg->hsm.a_conn)) {
- iotg->hsm.b_bus_req = 0;
- langwell_otg_loc_sof(0);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- iotg->hsm.a_bus_suspend = 0;
-
- if (lnw->iotg.start_peripheral)
- lnw->iotg.start_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver not loaded.\n");
-
- iotg->otg.state = OTG_STATE_B_PERIPHERAL;
- }
- break;
-
- case OTG_STATE_A_IDLE:
- iotg->otg.default_a = 1;
- if (iotg->hsm.id) {
- iotg->otg.default_a = 0;
- iotg->hsm.b_bus_req = 0;
- iotg->hsm.vbus_srp_up = 0;
-
- langwell_otg_chrg_vbus(0);
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.a_bus_drop &&
- (iotg->hsm.a_srp_det || iotg->hsm.a_bus_req)) {
- langwell_otg_phy_low_power(0);
-
- /* Turn on VBus */
- iotg->otg.set_vbus(&iotg->otg, true);
-
- iotg->hsm.vbus_srp_up = 0;
- iotg->hsm.a_wait_vrise_tmout = 0;
- langwell_otg_add_timer(a_wait_vrise_tmr);
- iotg->otg.state = OTG_STATE_A_WAIT_VRISE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.a_bus_drop && iotg->hsm.a_sess_vld) {
- iotg->hsm.vbus_srp_up = 1;
- } else if (!iotg->hsm.a_sess_vld && iotg->hsm.vbus_srp_up) {
- msleep(10);
- langwell_otg_phy_low_power(0);
-
- /* Turn on VBus */
- iotg->otg.set_vbus(&iotg->otg, true);
- iotg->hsm.a_srp_det = 1;
- iotg->hsm.vbus_srp_up = 0;
- iotg->hsm.a_wait_vrise_tmout = 0;
- langwell_otg_add_timer(a_wait_vrise_tmr);
- iotg->otg.state = OTG_STATE_A_WAIT_VRISE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.a_sess_vld &&
- !iotg->hsm.vbus_srp_up) {
- langwell_otg_phy_low_power(1);
- }
- break;
- case OTG_STATE_A_WAIT_VRISE:
- if (iotg->hsm.id) {
- langwell_otg_del_timer(a_wait_vrise_tmr);
- iotg->hsm.b_bus_req = 0;
- iotg->otg.default_a = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- set_client_mode();
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- } else if (iotg->hsm.a_vbus_vld) {
- langwell_otg_del_timer(a_wait_vrise_tmr);
- iotg->hsm.b_conn = 0;
- if (lnw->iotg.start_host)
- lnw->iotg.start_host(&lnw->iotg);
- else {
- dev_dbg(lnw->dev, "host driver not loaded.\n");
- break;
- }
-
- langwell_otg_add_ktimer(TA_WAIT_BCON_TMR);
- iotg->otg.state = OTG_STATE_A_WAIT_BCON;
- } else if (iotg->hsm.a_wait_vrise_tmout) {
- iotg->hsm.b_conn = 0;
- if (iotg->hsm.a_vbus_vld) {
- if (lnw->iotg.start_host)
- lnw->iotg.start_host(&lnw->iotg);
- else {
- dev_dbg(lnw->dev,
- "host driver not loaded.\n");
- break;
- }
- langwell_otg_add_ktimer(TA_WAIT_BCON_TMR);
- iotg->otg.state = OTG_STATE_A_WAIT_BCON;
- } else {
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_A_VBUS_ERR;
- }
- }
- break;
- case OTG_STATE_A_WAIT_BCON:
- if (iotg->hsm.id) {
- /* delete hsm timer for a_wait_bcon_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- iotg->otg.default_a = 0;
- iotg->hsm.b_bus_req = 0;
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- set_client_mode();
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.a_vbus_vld) {
- /* delete hsm timer for a_wait_bcon_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_A_VBUS_ERR;
- } else if (iotg->hsm.a_bus_drop ||
- (iotg->hsm.a_wait_bcon_tmout &&
- !iotg->hsm.a_bus_req)) {
- /* delete hsm timer for a_wait_bcon_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_WAIT_VFALL;
- } else if (iotg->hsm.b_conn) {
- /* delete hsm timer for a_wait_bcon_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- iotg->hsm.a_suspend_req = 0;
- iotg->otg.state = OTG_STATE_A_HOST;
- if (iotg->hsm.a_srp_det && iotg->otg.host &&
- !iotg->otg.host->b_hnp_enable) {
- /* SRP capable peripheral-only device */
- iotg->hsm.a_bus_req = 1;
- iotg->hsm.a_srp_det = 0;
- } else if (!iotg->hsm.a_bus_req && iotg->otg.host &&
- iotg->otg.host->b_hnp_enable) {
- /* It is not safe enough to do a fast
- * transition from A_WAIT_BCON to
- * A_SUSPEND */
- msleep(10000);
- if (iotg->hsm.a_bus_req)
- break;
-
- if (request_irq(pdev->irq,
- otg_dummy_irq, IRQF_SHARED,
- driver_name, iotg->base) != 0) {
- dev_dbg(lnw->dev,
- "request interrupt %d fail\n",
- pdev->irq);
- }
-
- langwell_otg_HABA(1);
- iotg->hsm.b_bus_resume = 0;
- iotg->hsm.a_aidl_bdis_tmout = 0;
-
- langwell_otg_loc_sof(0);
- /* clear PHCD to enable HW timer */
- langwell_otg_phy_low_power(0);
- langwell_otg_add_timer(a_aidl_bdis_tmr);
- iotg->otg.state = OTG_STATE_A_SUSPEND;
- } else if (!iotg->hsm.a_bus_req && iotg->otg.host &&
- !iotg->otg.host->b_hnp_enable) {
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_WAIT_VFALL;
- }
- }
- break;
- case OTG_STATE_A_HOST:
- if (iotg->hsm.id) {
- iotg->otg.default_a = 0;
- iotg->hsm.b_bus_req = 0;
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- set_client_mode();
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.a_bus_drop ||
- (iotg->otg.host &&
- !iotg->otg.host->b_hnp_enable &&
- !iotg->hsm.a_bus_req)) {
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_WAIT_VFALL;
- } else if (!iotg->hsm.a_vbus_vld) {
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_A_VBUS_ERR;
- } else if (iotg->otg.host &&
- iotg->otg.host->b_hnp_enable &&
- !iotg->hsm.a_bus_req) {
- /* Set HABA to enable hardware assistance to signal
- * A-connect after receiver B-disconnect. Hardware
- * will then set client mode and enable URE, SLE and
- * PCE after the assistance. otg_dummy_irq is used to
- * clean these ints when client driver is not resumed.
- */
- if (request_irq(pdev->irq, otg_dummy_irq, IRQF_SHARED,
- driver_name, iotg->base) != 0) {
- dev_dbg(lnw->dev,
- "request interrupt %d failed\n",
- pdev->irq);
- }
-
- /* set HABA */
- langwell_otg_HABA(1);
- iotg->hsm.b_bus_resume = 0;
- iotg->hsm.a_aidl_bdis_tmout = 0;
- langwell_otg_loc_sof(0);
- /* clear PHCD to enable HW timer */
- langwell_otg_phy_low_power(0);
- langwell_otg_add_timer(a_aidl_bdis_tmr);
- iotg->otg.state = OTG_STATE_A_SUSPEND;
- } else if (!iotg->hsm.b_conn || !iotg->hsm.a_bus_req) {
- langwell_otg_add_ktimer(TA_WAIT_BCON_TMR);
- iotg->otg.state = OTG_STATE_A_WAIT_BCON;
- }
- break;
- case OTG_STATE_A_SUSPEND:
- if (iotg->hsm.id) {
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- free_irq(pdev->irq, iotg->base);
- iotg->otg.default_a = 0;
- iotg->hsm.b_bus_req = 0;
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.a_bus_req ||
- iotg->hsm.b_bus_resume) {
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- free_irq(pdev->irq, iotg->base);
- iotg->hsm.a_suspend_req = 0;
- langwell_otg_loc_sof(1);
- iotg->otg.state = OTG_STATE_A_HOST;
- } else if (iotg->hsm.a_aidl_bdis_tmout ||
- iotg->hsm.a_bus_drop) {
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- free_irq(pdev->irq, iotg->base);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_WAIT_VFALL;
- } else if (!iotg->hsm.b_conn && iotg->otg.host &&
- iotg->otg.host->b_hnp_enable) {
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- free_irq(pdev->irq, iotg->base);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- iotg->hsm.b_bus_suspend = 0;
- iotg->hsm.b_bus_suspend_vld = 0;
-
- /* msleep(200); */
- if (lnw->iotg.start_peripheral)
- lnw->iotg.start_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver not loaded.\n");
-
- langwell_otg_add_ktimer(TB_BUS_SUSPEND_TMR);
- iotg->otg.state = OTG_STATE_A_PERIPHERAL;
- break;
- } else if (!iotg->hsm.a_vbus_vld) {
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- free_irq(pdev->irq, iotg->base);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_A_VBUS_ERR;
- }
- break;
- case OTG_STATE_A_PERIPHERAL:
- if (iotg->hsm.id) {
- /* delete hsm timer for b_bus_suspend_tmr */
- del_timer_sync(&lnw->hsm_timer);
- iotg->otg.default_a = 0;
- iotg->hsm.b_bus_req = 0;
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- set_client_mode();
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (!iotg->hsm.a_vbus_vld) {
- /* delete hsm timer for b_bus_suspend_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- langwell_otg_phy_low_power_wait(1);
- iotg->otg.state = OTG_STATE_A_VBUS_ERR;
- } else if (iotg->hsm.a_bus_drop) {
- /* delete hsm timer for b_bus_suspend_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_WAIT_VFALL;
- } else if (iotg->hsm.b_bus_suspend) {
- /* delete hsm timer for b_bus_suspend_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- if (lnw->iotg.start_host)
- lnw->iotg.start_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver not loaded.\n");
- langwell_otg_add_ktimer(TA_WAIT_BCON_TMR);
- iotg->otg.state = OTG_STATE_A_WAIT_BCON;
- } else if (iotg->hsm.b_bus_suspend_tmout) {
- u32 val;
- val = readl(lnw->iotg.base + CI_PORTSC1);
- if (!(val & PORTSC_SUSP))
- break;
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "client driver has been removed.\n");
-
- if (lnw->iotg.start_host)
- lnw->iotg.start_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev,
- "host driver not loaded.\n");
- langwell_otg_add_ktimer(TA_WAIT_BCON_TMR);
- iotg->otg.state = OTG_STATE_A_WAIT_BCON;
- }
- break;
- case OTG_STATE_A_VBUS_ERR:
- if (iotg->hsm.id) {
- iotg->otg.default_a = 0;
- iotg->hsm.a_clr_err = 0;
- iotg->hsm.a_srp_det = 0;
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.a_clr_err) {
- iotg->hsm.a_clr_err = 0;
- iotg->hsm.a_srp_det = 0;
- reset_otg();
- init_hsm();
- if (iotg->otg.state == OTG_STATE_A_IDLE)
- langwell_update_transceiver();
- } else {
- /* FW will clear PHCD bit when any VBus
- * event detected. Reset PHCD to 1 again */
- langwell_otg_phy_low_power(1);
- }
- break;
- case OTG_STATE_A_WAIT_VFALL:
- if (iotg->hsm.id) {
- iotg->otg.default_a = 0;
- set_client_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_B_IDLE;
- langwell_update_transceiver();
- } else if (iotg->hsm.a_bus_req) {
-
- /* Turn on VBus */
- iotg->otg.set_vbus(&iotg->otg, true);
- iotg->hsm.a_wait_vrise_tmout = 0;
- langwell_otg_add_timer(a_wait_vrise_tmr);
- iotg->otg.state = OTG_STATE_A_WAIT_VRISE;
- } else if (!iotg->hsm.a_sess_vld) {
- iotg->hsm.a_srp_det = 0;
- set_host_mode();
- langwell_otg_phy_low_power(1);
- iotg->otg.state = OTG_STATE_A_IDLE;
- }
- break;
- default:
- ;
- }
-
- dev_dbg(lnw->dev, "%s: new state = %s\n", __func__,
- otg_state_string(iotg->otg.state));
-}
-
-static ssize_t
-show_registers(struct device *_dev, struct device_attribute *attr, char *buf)
-{
- struct langwell_otg *lnw = the_transceiver;
- char *next;
- unsigned size, t;
-
- next = buf;
- size = PAGE_SIZE;
-
- t = scnprintf(next, size,
- "\n"
- "USBCMD = 0x%08x\n"
- "USBSTS = 0x%08x\n"
- "USBINTR = 0x%08x\n"
- "ASYNCLISTADDR = 0x%08x\n"
- "PORTSC1 = 0x%08x\n"
- "HOSTPC1 = 0x%08x\n"
- "OTGSC = 0x%08x\n"
- "USBMODE = 0x%08x\n",
- readl(lnw->iotg.base + 0x30),
- readl(lnw->iotg.base + 0x34),
- readl(lnw->iotg.base + 0x38),
- readl(lnw->iotg.base + 0x48),
- readl(lnw->iotg.base + 0x74),
- readl(lnw->iotg.base + 0xb4),
- readl(lnw->iotg.base + 0xf4),
- readl(lnw->iotg.base + 0xf8)
- );
- size -= t;
- next += t;
-
- return PAGE_SIZE - size;
-}
-static DEVICE_ATTR(registers, S_IRUGO, show_registers, NULL);
-
-static ssize_t
-show_hsm(struct device *_dev, struct device_attribute *attr, char *buf)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- char *next;
- unsigned size, t;
-
- next = buf;
- size = PAGE_SIZE;
-
- if (iotg->otg.host)
- iotg->hsm.a_set_b_hnp_en = iotg->otg.host->b_hnp_enable;
-
- if (iotg->otg.gadget)
- iotg->hsm.b_hnp_enable = iotg->otg.gadget->b_hnp_enable;
-
- t = scnprintf(next, size,
- "\n"
- "current state = %s\n"
- "a_bus_resume = \t%d\n"
- "a_bus_suspend = \t%d\n"
- "a_conn = \t%d\n"
- "a_sess_vld = \t%d\n"
- "a_srp_det = \t%d\n"
- "a_vbus_vld = \t%d\n"
- "b_bus_resume = \t%d\n"
- "b_bus_suspend = \t%d\n"
- "b_conn = \t%d\n"
- "b_se0_srp = \t%d\n"
- "b_sess_end = \t%d\n"
- "b_sess_vld = \t%d\n"
- "id = \t%d\n"
- "a_set_b_hnp_en = \t%d\n"
- "b_srp_done = \t%d\n"
- "b_hnp_enable = \t%d\n"
- "a_wait_vrise_tmout = \t%d\n"
- "a_wait_bcon_tmout = \t%d\n"
- "a_aidl_bdis_tmout = \t%d\n"
- "b_ase0_brst_tmout = \t%d\n"
- "a_bus_drop = \t%d\n"
- "a_bus_req = \t%d\n"
- "a_clr_err = \t%d\n"
- "a_suspend_req = \t%d\n"
- "b_bus_req = \t%d\n"
- "b_bus_suspend_tmout = \t%d\n"
- "b_bus_suspend_vld = \t%d\n",
- otg_state_string(iotg->otg.state),
- iotg->hsm.a_bus_resume,
- iotg->hsm.a_bus_suspend,
- iotg->hsm.a_conn,
- iotg->hsm.a_sess_vld,
- iotg->hsm.a_srp_det,
- iotg->hsm.a_vbus_vld,
- iotg->hsm.b_bus_resume,
- iotg->hsm.b_bus_suspend,
- iotg->hsm.b_conn,
- iotg->hsm.b_se0_srp,
- iotg->hsm.b_sess_end,
- iotg->hsm.b_sess_vld,
- iotg->hsm.id,
- iotg->hsm.a_set_b_hnp_en,
- iotg->hsm.b_srp_done,
- iotg->hsm.b_hnp_enable,
- iotg->hsm.a_wait_vrise_tmout,
- iotg->hsm.a_wait_bcon_tmout,
- iotg->hsm.a_aidl_bdis_tmout,
- iotg->hsm.b_ase0_brst_tmout,
- iotg->hsm.a_bus_drop,
- iotg->hsm.a_bus_req,
- iotg->hsm.a_clr_err,
- iotg->hsm.a_suspend_req,
- iotg->hsm.b_bus_req,
- iotg->hsm.b_bus_suspend_tmout,
- iotg->hsm.b_bus_suspend_vld
- );
- size -= t;
- next += t;
-
- return PAGE_SIZE - size;
-}
-static DEVICE_ATTR(hsm, S_IRUGO, show_hsm, NULL);
-
-static ssize_t
-get_a_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct langwell_otg *lnw = the_transceiver;
- char *next;
- unsigned size, t;
-
- next = buf;
- size = PAGE_SIZE;
-
- t = scnprintf(next, size, "%d", lnw->iotg.hsm.a_bus_req);
- size -= t;
- next += t;
-
- return PAGE_SIZE - size;
-}
-
-static ssize_t
-set_a_bus_req(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
-
- if (!iotg->otg.default_a)
- return -1;
- if (count > 2)
- return -1;
-
- if (buf[0] == '0') {
- iotg->hsm.a_bus_req = 0;
- dev_dbg(lnw->dev, "User request: a_bus_req = 0\n");
- } else if (buf[0] == '1') {
- /* If a_bus_drop is TRUE, a_bus_req can't be set */
- if (iotg->hsm.a_bus_drop)
- return -1;
- iotg->hsm.a_bus_req = 1;
- dev_dbg(lnw->dev, "User request: a_bus_req = 1\n");
- }
- if (spin_trylock(&lnw->wq_lock)) {
- langwell_update_transceiver();
- spin_unlock(&lnw->wq_lock);
- }
- return count;
-}
-static DEVICE_ATTR(a_bus_req, S_IRUGO | S_IWUSR, get_a_bus_req, set_a_bus_req);
-
-static ssize_t
-get_a_bus_drop(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct langwell_otg *lnw = the_transceiver;
- char *next;
- unsigned size, t;
-
- next = buf;
- size = PAGE_SIZE;
-
- t = scnprintf(next, size, "%d", lnw->iotg.hsm.a_bus_drop);
- size -= t;
- next += t;
-
- return PAGE_SIZE - size;
-}
-
-static ssize_t
-set_a_bus_drop(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
-
- if (!iotg->otg.default_a)
- return -1;
- if (count > 2)
- return -1;
-
- if (buf[0] == '0') {
- iotg->hsm.a_bus_drop = 0;
- dev_dbg(lnw->dev, "User request: a_bus_drop = 0\n");
- } else if (buf[0] == '1') {
- iotg->hsm.a_bus_drop = 1;
- iotg->hsm.a_bus_req = 0;
- dev_dbg(lnw->dev, "User request: a_bus_drop = 1\n");
- dev_dbg(lnw->dev, "User request: and a_bus_req = 0\n");
- }
- if (spin_trylock(&lnw->wq_lock)) {
- langwell_update_transceiver();
- spin_unlock(&lnw->wq_lock);
- }
- return count;
-}
-static DEVICE_ATTR(a_bus_drop, S_IRUGO | S_IWUSR, get_a_bus_drop, set_a_bus_drop);
-
-static ssize_t
-get_b_bus_req(struct device *dev, struct device_attribute *attr, char *buf)
-{
- struct langwell_otg *lnw = the_transceiver;
- char *next;
- unsigned size, t;
-
- next = buf;
- size = PAGE_SIZE;
-
- t = scnprintf(next, size, "%d", lnw->iotg.hsm.b_bus_req);
- size -= t;
- next += t;
-
- return PAGE_SIZE - size;
-}
-
-static ssize_t
-set_b_bus_req(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
-
- if (iotg->otg.default_a)
- return -1;
-
- if (count > 2)
- return -1;
-
- if (buf[0] == '0') {
- iotg->hsm.b_bus_req = 0;
- dev_dbg(lnw->dev, "User request: b_bus_req = 0\n");
- } else if (buf[0] == '1') {
- iotg->hsm.b_bus_req = 1;
- dev_dbg(lnw->dev, "User request: b_bus_req = 1\n");
- }
- if (spin_trylock(&lnw->wq_lock)) {
- langwell_update_transceiver();
- spin_unlock(&lnw->wq_lock);
- }
- return count;
-}
-static DEVICE_ATTR(b_bus_req, S_IRUGO | S_IWUSR, get_b_bus_req, set_b_bus_req);
-
-static ssize_t
-set_a_clr_err(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
-
- if (!iotg->otg.default_a)
- return -1;
- if (count > 2)
- return -1;
-
- if (buf[0] == '1') {
- iotg->hsm.a_clr_err = 1;
- dev_dbg(lnw->dev, "User request: a_clr_err = 1\n");
- }
- if (spin_trylock(&lnw->wq_lock)) {
- langwell_update_transceiver();
- spin_unlock(&lnw->wq_lock);
- }
- return count;
-}
-static DEVICE_ATTR(a_clr_err, S_IWUSR, NULL, set_a_clr_err);
-
-static struct attribute *inputs_attrs[] = {
- &dev_attr_a_bus_req.attr,
- &dev_attr_a_bus_drop.attr,
- &dev_attr_b_bus_req.attr,
- &dev_attr_a_clr_err.attr,
- NULL,
-};
-
-static struct attribute_group debug_dev_attr_group = {
- .name = "inputs",
- .attrs = inputs_attrs,
-};
-
-static int langwell_otg_probe(struct pci_dev *pdev,
- const struct pci_device_id *id)
-{
- unsigned long resource, len;
- void __iomem *base = NULL;
- int retval;
- u32 val32;
- struct langwell_otg *lnw;
- char qname[] = "langwell_otg_queue";
-
- retval = 0;
- dev_dbg(&pdev->dev, "\notg controller is detected.\n");
- if (pci_enable_device(pdev) < 0) {
- retval = -ENODEV;
- goto done;
- }
-
- lnw = kzalloc(sizeof *lnw, GFP_KERNEL);
- if (lnw == NULL) {
- retval = -ENOMEM;
- goto done;
- }
- the_transceiver = lnw;
-
- /* control register: BAR 0 */
- resource = pci_resource_start(pdev, 0);
- len = pci_resource_len(pdev, 0);
- if (!request_mem_region(resource, len, driver_name)) {
- retval = -EBUSY;
- goto err;
- }
- lnw->region = 1;
-
- base = ioremap_nocache(resource, len);
- if (base == NULL) {
- retval = -EFAULT;
- goto err;
- }
- lnw->iotg.base = base;
-
- if (!request_mem_region(USBCFG_ADDR, USBCFG_LEN, driver_name)) {
- retval = -EBUSY;
- goto err;
- }
- lnw->cfg_region = 1;
-
- /* For the SCCB.USBCFG register */
- base = ioremap_nocache(USBCFG_ADDR, USBCFG_LEN);
- if (base == NULL) {
- retval = -EFAULT;
- goto err;
- }
- lnw->usbcfg = base;
-
- if (!pdev->irq) {
- dev_dbg(&pdev->dev, "No IRQ.\n");
- retval = -ENODEV;
- goto err;
- }
-
- lnw->qwork = create_singlethread_workqueue(qname);
- if (!lnw->qwork) {
- dev_dbg(&pdev->dev, "cannot create workqueue %s\n", qname);
- retval = -ENOMEM;
- goto err;
- }
- INIT_WORK(&lnw->work, langwell_otg_work);
-
- /* OTG common part */
- lnw->dev = &pdev->dev;
- lnw->iotg.otg.dev = lnw->dev;
- lnw->iotg.otg.label = driver_name;
- lnw->iotg.otg.set_host = langwell_otg_set_host;
- lnw->iotg.otg.set_peripheral = langwell_otg_set_peripheral;
- lnw->iotg.otg.set_power = langwell_otg_set_power;
- lnw->iotg.otg.set_vbus = langwell_otg_set_vbus;
- lnw->iotg.otg.start_srp = langwell_otg_start_srp;
- lnw->iotg.otg.state = OTG_STATE_UNDEFINED;
-
- if (otg_set_transceiver(&lnw->iotg.otg)) {
- dev_dbg(lnw->dev, "can't set transceiver\n");
- retval = -EBUSY;
- goto err;
- }
-
- reset_otg();
- init_hsm();
-
- spin_lock_init(&lnw->lock);
- spin_lock_init(&lnw->wq_lock);
- INIT_LIST_HEAD(&active_timers);
- retval = langwell_otg_init_timers(&lnw->iotg.hsm);
- if (retval) {
- dev_dbg(&pdev->dev, "Failed to init timers\n");
- goto err;
- }
-
- init_timer(&lnw->hsm_timer);
- ATOMIC_INIT_NOTIFIER_HEAD(&lnw->iotg.iotg_notifier);
-
- lnw->iotg_notifier.notifier_call = langwell_otg_iotg_notify;
-
- retval = intel_mid_otg_register_notifier(&lnw->iotg,
- &lnw->iotg_notifier);
- if (retval) {
- dev_dbg(lnw->dev, "Failed to register notifier\n");
- goto err;
- }
-
- if (request_irq(pdev->irq, otg_irq, IRQF_SHARED,
- driver_name, lnw) != 0) {
- dev_dbg(lnw->dev, "request interrupt %d failed\n", pdev->irq);
- retval = -EBUSY;
- goto err;
- }
-
- /* enable OTGSC int */
- val32 = OTGSC_DPIE | OTGSC_BSEIE | OTGSC_BSVIE |
- OTGSC_ASVIE | OTGSC_AVVIE | OTGSC_IDIE | OTGSC_IDPU;
- writel(val32, lnw->iotg.base + CI_OTGSC);
-
- retval = device_create_file(&pdev->dev, &dev_attr_registers);
- if (retval < 0) {
- dev_dbg(lnw->dev,
- "Can't register sysfs attribute: %d\n", retval);
- goto err;
- }
-
- retval = device_create_file(&pdev->dev, &dev_attr_hsm);
- if (retval < 0) {
- dev_dbg(lnw->dev, "Can't hsm sysfs attribute: %d\n", retval);
- goto err;
- }
-
- retval = sysfs_create_group(&pdev->dev.kobj, &debug_dev_attr_group);
- if (retval < 0) {
- dev_dbg(lnw->dev,
- "Can't register sysfs attr group: %d\n", retval);
- goto err;
- }
-
- if (lnw->iotg.otg.state == OTG_STATE_A_IDLE)
- langwell_update_transceiver();
-
- return 0;
-
-err:
- if (the_transceiver)
- langwell_otg_remove(pdev);
-done:
- return retval;
-}
-
-static void langwell_otg_remove(struct pci_dev *pdev)
-{
- struct langwell_otg *lnw = the_transceiver;
-
- if (lnw->qwork) {
- flush_workqueue(lnw->qwork);
- destroy_workqueue(lnw->qwork);
- }
- intel_mid_otg_unregister_notifier(&lnw->iotg, &lnw->iotg_notifier);
- langwell_otg_free_timers();
-
- /* disable OTGSC interrupt as OTGSC doesn't change in reset */
- writel(0, lnw->iotg.base + CI_OTGSC);
-
- if (pdev->irq)
- free_irq(pdev->irq, lnw);
- if (lnw->usbcfg)
- iounmap(lnw->usbcfg);
- if (lnw->cfg_region)
- release_mem_region(USBCFG_ADDR, USBCFG_LEN);
- if (lnw->iotg.base)
- iounmap(lnw->iotg.base);
- if (lnw->region)
- release_mem_region(pci_resource_start(pdev, 0),
- pci_resource_len(pdev, 0));
-
- otg_set_transceiver(NULL);
- pci_disable_device(pdev);
- sysfs_remove_group(&pdev->dev.kobj, &debug_dev_attr_group);
- device_remove_file(&pdev->dev, &dev_attr_hsm);
- device_remove_file(&pdev->dev, &dev_attr_registers);
- kfree(lnw);
- lnw = NULL;
-}
-
-static void transceiver_suspend(struct pci_dev *pdev)
-{
- pci_save_state(pdev);
- pci_set_power_state(pdev, PCI_D3hot);
- langwell_otg_phy_low_power(1);
-}
-
-static int langwell_otg_suspend(struct pci_dev *pdev, pm_message_t message)
-{
- struct langwell_otg *lnw = the_transceiver;
- struct intel_mid_otg_xceiv *iotg = &lnw->iotg;
- int ret = 0;
-
- /* Disbale OTG interrupts */
- langwell_otg_intr(0);
-
- if (pdev->irq)
- free_irq(pdev->irq, lnw);
-
- /* Prevent more otg_work */
- flush_workqueue(lnw->qwork);
- destroy_workqueue(lnw->qwork);
- lnw->qwork = NULL;
-
- /* start actions */
- switch (iotg->otg.state) {
- case OTG_STATE_A_WAIT_VFALL:
- iotg->otg.state = OTG_STATE_A_IDLE;
- case OTG_STATE_A_IDLE:
- case OTG_STATE_B_IDLE:
- case OTG_STATE_A_VBUS_ERR:
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_A_WAIT_VRISE:
- langwell_otg_del_timer(a_wait_vrise_tmr);
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_A_WAIT_BCON:
- del_timer_sync(&lnw->hsm_timer);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(&pdev->dev, "host driver has been removed.\n");
-
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_A_HOST:
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(&pdev->dev, "host driver has been removed.\n");
-
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
-
- iotg->otg.state = OTG_STATE_A_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_A_SUSPEND:
- langwell_otg_del_timer(a_aidl_bdis_tmr);
- langwell_otg_HABA(0);
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(lnw->dev, "host driver has been removed.\n");
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_A_PERIPHERAL:
- del_timer_sync(&lnw->hsm_timer);
-
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(&pdev->dev,
- "client driver has been removed.\n");
- iotg->hsm.a_srp_det = 0;
-
- /* Turn off VBus */
- iotg->otg.set_vbus(&iotg->otg, false);
- iotg->otg.state = OTG_STATE_A_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_B_HOST:
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(&pdev->dev, "host driver has been removed.\n");
- iotg->hsm.b_bus_req = 0;
- iotg->otg.state = OTG_STATE_B_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_B_PERIPHERAL:
- if (lnw->iotg.stop_peripheral)
- lnw->iotg.stop_peripheral(&lnw->iotg);
- else
- dev_dbg(&pdev->dev,
- "client driver has been removed.\n");
- iotg->otg.state = OTG_STATE_B_IDLE;
- transceiver_suspend(pdev);
- break;
- case OTG_STATE_B_WAIT_ACON:
- /* delete hsm timer for b_ase0_brst_tmr */
- del_timer_sync(&lnw->hsm_timer);
-
- langwell_otg_HAAR(0);
-
- if (lnw->iotg.stop_host)
- lnw->iotg.stop_host(&lnw->iotg);
- else
- dev_dbg(&pdev->dev, "host driver has been removed.\n");
- iotg->hsm.b_bus_req = 0;
- iotg->otg.state = OTG_STATE_B_IDLE;
- transceiver_suspend(pdev);
- break;
- default:
- dev_dbg(lnw->dev, "error state before suspend\n");
- break;
- }
-
- return ret;
-}
-
-static void transceiver_resume(struct pci_dev *pdev)
-{
- pci_restore_state(pdev);
- pci_set_power_state(pdev, PCI_D0);
-}
-
-static int langwell_otg_resume(struct pci_dev *pdev)
-{
- struct langwell_otg *lnw = the_transceiver;
- int ret = 0;
-
- transceiver_resume(pdev);
-
- lnw->qwork = create_singlethread_workqueue("langwell_otg_queue");
- if (!lnw->qwork) {
- dev_dbg(&pdev->dev, "cannot create langwell otg workqueuen");
- ret = -ENOMEM;
- goto error;
- }
-
- if (request_irq(pdev->irq, otg_irq, IRQF_SHARED,
- driver_name, lnw) != 0) {
- dev_dbg(&pdev->dev, "request interrupt %d failed\n", pdev->irq);
- ret = -EBUSY;
- goto error;
- }
-
- /* enable OTG interrupts */
- langwell_otg_intr(1);
-
- update_hsm();
-
- langwell_update_transceiver();
-
- return ret;
-error:
- langwell_otg_intr(0);
- transceiver_suspend(pdev);
- return ret;
-}
-
-static int __init langwell_otg_init(void)
-{
- return pci_register_driver(&otg_pci_driver);
-}
-module_init(langwell_otg_init);
-
-static void __exit langwell_otg_cleanup(void)
-{
- pci_unregister_driver(&otg_pci_driver);
-}
-module_exit(langwell_otg_cleanup);
projects / GitHub / LineageOS / G12 / android_kernel_amlogic_linux-4.9.git / commitdiff