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gerrit-public.fairphone.software / kernel / msm / 87c8d39d245b3ea0311e97e579ee5f83bb99ba25 / . / drivers / usb / otg / msm_otg.c
blob: ec9ac244bfe11d5776407a15f1e5b20d8bc5c7e3 [file] [log] [blame]
/* Copyright (c) 2009-2012, Code Aurora Forum. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that 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.
*
*/
#include <linux/module.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/err.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/uaccess.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/dma-mapping.h>
#include <linux/usb.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
#include <linux/usb/gadget.h>
#include <linux/usb/hcd.h>
#include <linux/usb/msm_hsusb.h>
#include <linux/usb/msm_hsusb_hw.h>
#include <linux/regulator/consumer.h>
#include <linux/mfd/pm8xxx/pm8921-charger.h>
#include <linux/pm_qos_params.h>
#include <linux/power_supply.h>
#include <mach/clk.h>
#include <mach/msm_xo.h>
#define MSM_USB_BASE (motg->regs)
#define DRIVER_NAME "msm_otg"
#define ID_TIMER_FREQ (jiffies + msecs_to_jiffies(2000))
#define ULPI_IO_TIMEOUT_USEC (10 * 1000)
#define USB_PHY_3P3_VOL_MIN 3050000 /* uV */
#define USB_PHY_3P3_VOL_MAX 3300000 /* uV */
#define USB_PHY_3P3_HPM_LOAD 50000 /* uA */
#define USB_PHY_3P3_LPM_LOAD 4000 /* uA */
#define USB_PHY_1P8_VOL_MIN 1800000 /* uV */
#define USB_PHY_1P8_VOL_MAX 1800000 /* uV */
#define USB_PHY_1P8_HPM_LOAD 50000 /* uA */
#define USB_PHY_1P8_LPM_LOAD 4000 /* uA */
#define USB_PHY_VDD_DIG_VOL_MIN 1045000 /* uV */
#define USB_PHY_VDD_DIG_VOL_MAX 1320000 /* uV */
static DECLARE_COMPLETION(pmic_vbus_init);
static struct msm_otg *the_msm_otg;
static bool debug_aca_enabled;
/* Prevent idle power collapse(pc) while operating in peripheral mode */
static void otg_pm_qos_update_latency(struct msm_otg *dev, int vote)
{
struct msm_otg_platform_data *pdata = dev->pdata;
u32 swfi_latency = 0;
if (!pdata || !pdata->swfi_latency)
return;
swfi_latency = pdata->swfi_latency + 1;
if (vote)
pm_qos_update_request(&dev->pm_qos_req_dma,
swfi_latency);
else
pm_qos_update_request(&dev->pm_qos_req_dma,
PM_QOS_DEFAULT_VALUE);
}
static struct regulator *hsusb_3p3;
static struct regulator *hsusb_1p8;
static struct regulator *hsusb_vddcx;
static struct regulator *vbus_otg;
static bool aca_id_turned_on;
static inline bool aca_enabled(void)
{
#ifdef CONFIG_USB_MSM_ACA
return true;
#else
return debug_aca_enabled;
#endif
}
static int msm_hsusb_init_vddcx(struct msm_otg *motg, int init)
{
int ret = 0;
if (init) {
hsusb_vddcx = regulator_get(motg->otg.dev, "HSUSB_VDDCX");
if (IS_ERR(hsusb_vddcx)) {
dev_err(motg->otg.dev, "unable to get hsusb vddcx\n");
return PTR_ERR(hsusb_vddcx);
}
ret = regulator_set_voltage(hsusb_vddcx,
USB_PHY_VDD_DIG_VOL_MIN,
USB_PHY_VDD_DIG_VOL_MAX);
if (ret) {
dev_err(motg->otg.dev, "unable to set the voltage "
"for hsusb vddcx\n");
regulator_put(hsusb_vddcx);
return ret;
}
ret = regulator_enable(hsusb_vddcx);
if (ret) {
regulator_set_voltage(hsusb_vddcx, 0,
USB_PHY_VDD_DIG_VOL_MIN);
regulator_put(hsusb_vddcx);
dev_err(motg->otg.dev, "unable to enable the hsusb vddcx\n");
return ret;
}
} else {
ret = regulator_disable(hsusb_vddcx);
if (ret) {
dev_err(motg->otg.dev, "unable to disable hsusb vddcx\n");
return ret;
}
ret = regulator_set_voltage(hsusb_vddcx, 0,
USB_PHY_VDD_DIG_VOL_MIN);
if (ret) {
dev_err(motg->otg.dev, "unable to set the voltage"
"for hsusb vddcx\n");
return ret;
}
regulator_put(hsusb_vddcx);
}
return ret;
}
static int msm_hsusb_ldo_init(struct msm_otg *motg, int init)
{
int rc = 0;
if (init) {
hsusb_3p3 = regulator_get(motg->otg.dev, "HSUSB_3p3");
if (IS_ERR(hsusb_3p3)) {
dev_err(motg->otg.dev, "unable to get hsusb 3p3\n");
return PTR_ERR(hsusb_3p3);
}
rc = regulator_set_voltage(hsusb_3p3, USB_PHY_3P3_VOL_MIN,
USB_PHY_3P3_VOL_MAX);
if (rc) {
dev_err(motg->otg.dev, "unable to set voltage level for"
"hsusb 3p3\n");
goto put_3p3;
}
hsusb_1p8 = regulator_get(motg->otg.dev, "HSUSB_1p8");
if (IS_ERR(hsusb_1p8)) {
dev_err(motg->otg.dev, "unable to get hsusb 1p8\n");
rc = PTR_ERR(hsusb_1p8);
goto put_3p3_lpm;
}
rc = regulator_set_voltage(hsusb_1p8, USB_PHY_1P8_VOL_MIN,
USB_PHY_1P8_VOL_MAX);
if (rc) {
dev_err(motg->otg.dev, "unable to set voltage level for"
"hsusb 1p8\n");
goto put_1p8;
}
return 0;
}
put_1p8:
regulator_set_voltage(hsusb_1p8, 0, USB_PHY_1P8_VOL_MAX);
regulator_put(hsusb_1p8);
put_3p3_lpm:
regulator_set_voltage(hsusb_3p3, 0, USB_PHY_3P3_VOL_MAX);
put_3p3:
regulator_put(hsusb_3p3);
return rc;
}
#ifdef CONFIG_PM_SLEEP
#define USB_PHY_SUSP_DIG_VOL 500000
static int msm_hsusb_config_vddcx(int high)
{
int max_vol = USB_PHY_VDD_DIG_VOL_MAX;
int min_vol;
int ret;
if (high)
min_vol = USB_PHY_VDD_DIG_VOL_MIN;
else
min_vol = USB_PHY_SUSP_DIG_VOL;
ret = regulator_set_voltage(hsusb_vddcx, min_vol, max_vol);
if (ret) {
pr_err("%s: unable to set the voltage for regulator "
"HSUSB_VDDCX\n", __func__);
return ret;
}
pr_debug("%s: min_vol:%d max_vol:%d\n", __func__, min_vol, max_vol);
return ret;
}
#else
static int msm_hsusb_config_vddcx(int high)
{
return 0;
}
#endif
static int msm_hsusb_ldo_enable(struct msm_otg *motg, int on)
{
int ret = 0;
if (IS_ERR(hsusb_1p8)) {
pr_err("%s: HSUSB_1p8 is not initialized\n", __func__);
return -ENODEV;
}
if (IS_ERR(hsusb_3p3)) {
pr_err("%s: HSUSB_3p3 is not initialized\n", __func__);
return -ENODEV;
}
if (on) {
ret = regulator_set_optimum_mode(hsusb_1p8,
USB_PHY_1P8_HPM_LOAD);
if (ret < 0) {
pr_err("%s: Unable to set HPM of the regulator:"
"HSUSB_1p8\n", __func__);
return ret;
}
ret = regulator_enable(hsusb_1p8);
if (ret) {
dev_err(motg->otg.dev, "%s: unable to enable the hsusb 1p8\n",
__func__);
regulator_set_optimum_mode(hsusb_1p8, 0);
return ret;
}
ret = regulator_set_optimum_mode(hsusb_3p3,
USB_PHY_3P3_HPM_LOAD);
if (ret < 0) {
pr_err("%s: Unable to set HPM of the regulator:"
"HSUSB_3p3\n", __func__);
regulator_set_optimum_mode(hsusb_1p8, 0);
regulator_disable(hsusb_1p8);
return ret;
}
ret = regulator_enable(hsusb_3p3);
if (ret) {
dev_err(motg->otg.dev, "%s: unable to enable the hsusb 3p3\n",
__func__);
regulator_set_optimum_mode(hsusb_3p3, 0);
regulator_set_optimum_mode(hsusb_1p8, 0);
regulator_disable(hsusb_1p8);
return ret;
}
} else {
ret = regulator_disable(hsusb_1p8);
if (ret) {
dev_err(motg->otg.dev, "%s: unable to disable the hsusb 1p8\n",
__func__);
return ret;
}
ret = regulator_set_optimum_mode(hsusb_1p8, 0);
if (ret < 0)
pr_err("%s: Unable to set LPM of the regulator:"
"HSUSB_1p8\n", __func__);
ret = regulator_disable(hsusb_3p3);
if (ret) {
dev_err(motg->otg.dev, "%s: unable to disable the hsusb 3p3\n",
__func__);
return ret;
}
ret = regulator_set_optimum_mode(hsusb_3p3, 0);
if (ret < 0)
pr_err("%s: Unable to set LPM of the regulator:"
"HSUSB_3p3\n", __func__);
}
pr_debug("reg (%s)\n", on ? "HPM" : "LPM");
return ret < 0 ? ret : 0;
}
static void msm_hsusb_mhl_switch_enable(struct msm_otg *motg, bool on)
{
static struct regulator *mhl_analog_switch;
struct msm_otg_platform_data *pdata = motg->pdata;
if (!pdata->mhl_enable)
return;
if (on) {
mhl_analog_switch = regulator_get(motg->otg.dev,
"mhl_ext_3p3v");
if (IS_ERR(mhl_analog_switch)) {
pr_err("Unable to get mhl_analog_switch\n");
return;
}
if (regulator_enable(mhl_analog_switch)) {
pr_err("unable to enable mhl_analog_switch\n");
goto put_analog_switch;
}
return;
}
regulator_disable(mhl_analog_switch);
put_analog_switch:
regulator_put(mhl_analog_switch);
}
static int ulpi_read(struct otg_transceiver *otg, u32 reg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
int cnt = 0;
/* initiate read operation */
writel(ULPI_RUN | ULPI_READ | ULPI_ADDR(reg),
USB_ULPI_VIEWPORT);
/* wait for completion */
while (cnt < ULPI_IO_TIMEOUT_USEC) {
if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
break;
udelay(1);
cnt++;
}
if (cnt >= ULPI_IO_TIMEOUT_USEC) {
dev_err(otg->dev, "ulpi_read: timeout %08x\n",
readl(USB_ULPI_VIEWPORT));
return -ETIMEDOUT;
}
return ULPI_DATA_READ(readl(USB_ULPI_VIEWPORT));
}
static int ulpi_write(struct otg_transceiver *otg, u32 val, u32 reg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
int cnt = 0;
/* initiate write operation */
writel(ULPI_RUN | ULPI_WRITE |
ULPI_ADDR(reg) | ULPI_DATA(val),
USB_ULPI_VIEWPORT);
/* wait for completion */
while (cnt < ULPI_IO_TIMEOUT_USEC) {
if (!(readl(USB_ULPI_VIEWPORT) & ULPI_RUN))
break;
udelay(1);
cnt++;
}
if (cnt >= ULPI_IO_TIMEOUT_USEC) {
dev_err(otg->dev, "ulpi_write: timeout\n");
return -ETIMEDOUT;
}
return 0;
}
static struct otg_io_access_ops msm_otg_io_ops = {
.read = ulpi_read,
.write = ulpi_write,
};
static void ulpi_init(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
int *seq = pdata->phy_init_seq;
if (!seq)
return;
while (seq[0] >= 0) {
dev_vdbg(motg->otg.dev, "ulpi: write 0x%02x to 0x%02x\n",
seq[0], seq[1]);
ulpi_write(&motg->otg, seq[0], seq[1]);
seq += 2;
}
}
static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
{
int ret;
if (assert) {
ret = clk_reset(motg->clk, CLK_RESET_ASSERT);
if (ret)
dev_err(motg->otg.dev, "usb hs_clk assert failed\n");
} else {
ret = clk_reset(motg->clk, CLK_RESET_DEASSERT);
if (ret)
dev_err(motg->otg.dev, "usb hs_clk deassert failed\n");
}
return ret;
}
static int msm_otg_phy_clk_reset(struct msm_otg *motg)
{
int ret;
if (IS_ERR(motg->phy_reset_clk))
return 0;
ret = clk_reset(motg->phy_reset_clk, CLK_RESET_ASSERT);
if (ret) {
dev_err(motg->otg.dev, "usb phy clk assert failed\n");
return ret;
}
usleep_range(10000, 12000);
ret = clk_reset(motg->phy_reset_clk, CLK_RESET_DEASSERT);
if (ret)
dev_err(motg->otg.dev, "usb phy clk deassert failed\n");
return ret;
}
static int msm_otg_phy_reset(struct msm_otg *motg)
{
u32 val;
int ret;
int retries;
ret = msm_otg_link_clk_reset(motg, 1);
if (ret)
return ret;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
ret = msm_otg_link_clk_reset(motg, 0);
if (ret)
return ret;
val = readl(USB_PORTSC) & ~PORTSC_PTS_MASK;
writel(val | PORTSC_PTS_ULPI, USB_PORTSC);
for (retries = 3; retries > 0; retries--) {
ret = ulpi_write(&motg->otg, ULPI_FUNC_CTRL_SUSPENDM,
ULPI_CLR(ULPI_FUNC_CTRL));
if (!ret)
break;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
}
if (!retries)
return -ETIMEDOUT;
/* This reset calibrates the phy, if the above write succeeded */
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
for (retries = 3; retries > 0; retries--) {
ret = ulpi_read(&motg->otg, ULPI_DEBUG);
if (ret != -ETIMEDOUT)
break;
ret = msm_otg_phy_clk_reset(motg);
if (ret)
return ret;
}
if (!retries)
return -ETIMEDOUT;
dev_info(motg->otg.dev, "phy_reset: success\n");
return 0;
}
#define LINK_RESET_TIMEOUT_USEC (250 * 1000)
static int msm_otg_link_reset(struct msm_otg *motg)
{
int cnt = 0;
writel_relaxed(USBCMD_RESET, USB_USBCMD);
while (cnt < LINK_RESET_TIMEOUT_USEC) {
if (!(readl_relaxed(USB_USBCMD) & USBCMD_RESET))
break;
udelay(1);
cnt++;
}
if (cnt >= LINK_RESET_TIMEOUT_USEC)
return -ETIMEDOUT;
/* select ULPI phy */
writel_relaxed(0x80000000, USB_PORTSC);
writel_relaxed(0x0, USB_AHBBURST);
writel_relaxed(0x00, USB_AHBMODE);
return 0;
}
static int msm_otg_reset(struct otg_transceiver *otg)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
int ret;
u32 val = 0;
u32 ulpi_val = 0;
/*
* USB PHY and Link reset also reset the USB BAM.
* Thus perform reset operation only once to avoid
* USB BAM reset on other cases e.g. USB cable disconnections.
*/
if (pdata->disable_reset_on_disconnect) {
if (motg->reset_counter)
return 0;
else
motg->reset_counter++;
}
clk_enable(motg->clk);
ret = msm_otg_phy_reset(motg);
if (ret) {
dev_err(otg->dev, "phy_reset failed\n");
return ret;
}
aca_id_turned_on = false;
ret = msm_otg_link_reset(motg);
if (ret) {
dev_err(otg->dev, "link reset failed\n");
return ret;
}
msleep(100);
ulpi_init(motg);
/* Ensure that RESET operation is completed before turning off clock */
mb();
clk_disable(motg->clk);
if (pdata->otg_control == OTG_PHY_CONTROL) {
val = readl_relaxed(USB_OTGSC);
if (pdata->mode == USB_OTG) {
ulpi_val = ULPI_INT_IDGRD | ULPI_INT_SESS_VALID;
val |= OTGSC_IDIE | OTGSC_BSVIE;
} else if (pdata->mode == USB_PERIPHERAL) {
ulpi_val = ULPI_INT_SESS_VALID;
val |= OTGSC_BSVIE;
}
writel_relaxed(val, USB_OTGSC);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_RISE);
ulpi_write(otg, ulpi_val, ULPI_USB_INT_EN_FALL);
}
return 0;
}
static int msm_otg_set_suspend(struct otg_transceiver *otg, int suspend)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
/*
* Allow bus suspend only for host mode. Device mode bus suspend
* is not implemented yet.
*/
if (!test_bit(ID, &motg->inputs) || test_bit(ID_A, &motg->inputs)) {
/*
* ID_GND --> ID_A transition can not be detected in LPM.
* Disallow host bus suspend when ACA is enabled.
*/
if (suspend && !aca_enabled())
pm_runtime_put(otg->dev);
else
pm_runtime_resume(otg->dev);
}
return 0;
}
#define PHY_SUSPEND_TIMEOUT_USEC (500 * 1000)
#define PHY_RESUME_TIMEOUT_USEC (100 * 1000)
#ifdef CONFIG_PM_SLEEP
static int msm_otg_suspend(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
struct usb_bus *bus = otg->host;
struct msm_otg_platform_data *pdata = motg->pdata;
int cnt = 0;
bool host_bus_suspend;
u32 phy_ctrl_val = 0, cmd_val;
unsigned ret;
u32 portsc;
if (atomic_read(&motg->in_lpm))
return 0;
disable_irq(motg->irq);
host_bus_suspend = otg->host && !test_bit(ID, &motg->inputs);
/*
* Chipidea 45-nm PHY suspend sequence:
*
* Interrupt Latch Register auto-clear feature is not present
* in all PHY versions. Latch register is clear on read type.
* Clear latch register to avoid spurious wakeup from
* low power mode (LPM).
*
* PHY comparators are disabled when PHY enters into low power
* mode (LPM). Keep PHY comparators ON in LPM only when we expect
* VBUS/Id notifications from USB PHY. Otherwise turn off USB
* PHY comparators. This save significant amount of power.
*
* PLL is not turned off when PHY enters into low power mode (LPM).
* Disable PLL for maximum power savings.
*/
if (motg->pdata->phy_type == CI_45NM_INTEGRATED_PHY) {
ulpi_read(otg, 0x14);
if (pdata->otg_control == OTG_PHY_CONTROL)
ulpi_write(otg, 0x01, 0x30);
ulpi_write(otg, 0x08, 0x09);
}
/*
* Turn off the OTG comparators, if depends on PMIC for
* VBUS and ID notifications.
*/
if ((motg->caps & ALLOW_PHY_COMP_DISABLE) && !host_bus_suspend) {
ulpi_write(otg, OTG_COMP_DISABLE,
ULPI_SET(ULPI_PWR_CLK_MNG_REG));
motg->lpm_flags |= PHY_OTG_COMP_DISABLED;
}
/* Set the PHCD bit, only if it is not set by the controller.
* PHY may take some time or even fail to enter into low power
* mode (LPM). Hence poll for 500 msec and reset the PHY and link
* in failure case.
*/
portsc = readl_relaxed(USB_PORTSC);
if (!(portsc & PORTSC_PHCD)) {
writel_relaxed(portsc | PORTSC_PHCD,
USB_PORTSC);
while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
if (readl_relaxed(USB_PORTSC) & PORTSC_PHCD)
break;
udelay(1);
cnt++;
}
}
if (cnt >= PHY_SUSPEND_TIMEOUT_USEC) {
dev_err(otg->dev, "Unable to suspend PHY\n");
msm_otg_reset(otg);
enable_irq(motg->irq);
return -ETIMEDOUT;
}
/*
* PHY has capability to generate interrupt asynchronously in low
* power mode (LPM). This interrupt is level triggered. So USB IRQ
* line must be disabled till async interrupt enable bit is cleared
* in USBCMD register. Assert STP (ULPI interface STOP signal) to
* block data communication from PHY.
*/
cmd_val = readl_relaxed(USB_USBCMD);
if (host_bus_suspend)
cmd_val |= ASYNC_INTR_CTRL | ULPI_STP_CTRL;
else
cmd_val |= ULPI_STP_CTRL;
writel_relaxed(cmd_val, USB_USBCMD);
if (motg->caps & ALLOW_PHY_RETENTION && !host_bus_suspend) {
phy_ctrl_val = readl_relaxed(USB_PHY_CTRL);
if (motg->pdata->otg_control == OTG_PHY_CONTROL)
/* Enable PHY HV interrupts to wake MPM/Link */
phy_ctrl_val |=
(PHY_IDHV_INTEN | PHY_OTGSESSVLDHV_INTEN);
writel_relaxed(phy_ctrl_val & ~PHY_RETEN, USB_PHY_CTRL);
motg->lpm_flags |= PHY_RETENTIONED;
}
/* Ensure that above operation is completed before turning off clocks */
mb();
clk_disable(motg->pclk);
clk_disable(motg->core_clk);
/* usb phy no more require TCXO clock, hence vote for TCXO disable */
ret = msm_xo_mode_vote(motg->xo_handle, MSM_XO_MODE_OFF);
if (ret)
dev_err(otg->dev, "%s failed to devote for "
"TCXO D0 buffer%d\n", __func__, ret);
if (motg->caps & ALLOW_PHY_POWER_COLLAPSE && !host_bus_suspend) {
msm_hsusb_ldo_enable(motg, 0);
motg->lpm_flags |= PHY_PWR_COLLAPSED;
}
if (motg->lpm_flags & PHY_RETENTIONED) {
msm_hsusb_config_vddcx(0);
msm_hsusb_mhl_switch_enable(motg, 0);
}
if (device_may_wakeup(otg->dev)) {
enable_irq_wake(motg->irq);
if (motg->pdata->pmic_id_irq)
enable_irq_wake(motg->pdata->pmic_id_irq);
}
if (bus)
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
atomic_set(&motg->in_lpm, 1);
enable_irq(motg->irq);
wake_unlock(&motg->wlock);
dev_info(otg->dev, "USB in low power mode\n");
return 0;
}
static int msm_otg_resume(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
struct usb_bus *bus = otg->host;
int cnt = 0;
unsigned temp;
u32 phy_ctrl_val = 0;
unsigned ret;
if (!atomic_read(&motg->in_lpm))
return 0;
wake_lock(&motg->wlock);
/* Vote for TCXO when waking up the phy */
ret = msm_xo_mode_vote(motg->xo_handle, MSM_XO_MODE_ON);
if (ret)
dev_err(otg->dev, "%s failed to vote for "
"TCXO D0 buffer%d\n", __func__, ret);
clk_enable(motg->core_clk);
clk_enable(motg->pclk);
if (motg->lpm_flags & PHY_PWR_COLLAPSED) {
msm_hsusb_ldo_enable(motg, 1);
motg->lpm_flags &= ~PHY_PWR_COLLAPSED;
}
if (motg->lpm_flags & PHY_RETENTIONED) {
msm_hsusb_mhl_switch_enable(motg, 1);
msm_hsusb_config_vddcx(1);
phy_ctrl_val = readl_relaxed(USB_PHY_CTRL);
phy_ctrl_val |= PHY_RETEN;
if (motg->pdata->otg_control == OTG_PHY_CONTROL)
/* Disable PHY HV interrupts */
phy_ctrl_val &=
~(PHY_IDHV_INTEN | PHY_OTGSESSVLDHV_INTEN);
writel_relaxed(phy_ctrl_val, USB_PHY_CTRL);
motg->lpm_flags &= ~PHY_RETENTIONED;
}
temp = readl(USB_USBCMD);
temp &= ~ASYNC_INTR_CTRL;
temp &= ~ULPI_STP_CTRL;
writel(temp, USB_USBCMD);
/*
* PHY comes out of low power mode (LPM) in case of wakeup
* from asynchronous interrupt.
*/
if (!(readl(USB_PORTSC) & PORTSC_PHCD))
goto skip_phy_resume;
writel(readl(USB_PORTSC) & ~PORTSC_PHCD, USB_PORTSC);
while (cnt < PHY_RESUME_TIMEOUT_USEC) {
if (!(readl(USB_PORTSC) & PORTSC_PHCD))
break;
udelay(1);
cnt++;
}
if (cnt >= PHY_RESUME_TIMEOUT_USEC) {
/*
* This is a fatal error. Reset the link and
* PHY. USB state can not be restored. Re-insertion
* of USB cable is the only way to get USB working.
*/
dev_err(otg->dev, "Unable to resume USB."
"Re-plugin the cable\n");
msm_otg_reset(otg);
}
skip_phy_resume:
/* Turn on the OTG comparators on resume */
if (motg->lpm_flags & PHY_OTG_COMP_DISABLED) {
ulpi_write(otg, OTG_COMP_DISABLE,
ULPI_CLR(ULPI_PWR_CLK_MNG_REG));
motg->lpm_flags &= ~PHY_OTG_COMP_DISABLED;
}
if (device_may_wakeup(otg->dev)) {
disable_irq_wake(motg->irq);
if (motg->pdata->pmic_id_irq)
disable_irq_wake(motg->pdata->pmic_id_irq);
}
if (bus)
set_bit(HCD_FLAG_HW_ACCESSIBLE, &(bus_to_hcd(bus))->flags);
atomic_set(&motg->in_lpm, 0);
if (motg->async_int) {
motg->async_int = 0;
enable_irq(motg->irq);
}
dev_info(otg->dev, "USB exited from low power mode\n");
return 0;
}
#endif
static int msm_otg_notify_power_supply(struct msm_otg *motg, unsigned mA)
{
struct power_supply *psy;
psy = power_supply_get_by_name("usb");
if (!psy)
goto psy_not_supported;
if (motg->cur_power == 0 && mA > 0) {
/* Enable charging */
if (power_supply_set_online(psy, true))
goto psy_not_supported;
} else if (motg->cur_power > 0 && mA == 0) {
/* Disable charging */
if (power_supply_set_online(psy, false))
goto psy_not_supported;
return 0;
}
/* Set max current limit */
if (power_supply_set_current_limit(psy, 1000*mA))
goto psy_not_supported;
return 0;
psy_not_supported:
dev_dbg(motg->otg.dev, "Power Supply doesn't support USB charger\n");
return -ENXIO;
}
static void msm_otg_notify_charger(struct msm_otg *motg, unsigned mA)
{
if ((motg->chg_type == USB_ACA_DOCK_CHARGER ||
motg->chg_type == USB_ACA_A_CHARGER ||
motg->chg_type == USB_ACA_B_CHARGER ||
motg->chg_type == USB_ACA_C_CHARGER) &&
mA > IDEV_ACA_CHG_LIMIT)
mA = IDEV_ACA_CHG_LIMIT;
if (motg->cur_power == mA)
return;
dev_info(motg->otg.dev, "Avail curr from USB = %u\n", mA);
/*
* Use Power Supply API if supported, otherwise fallback
* to legacy pm8921 API.
*/
if (msm_otg_notify_power_supply(motg, mA))
pm8921_charger_vbus_draw(mA);
motg->cur_power = mA;
}
static int msm_otg_set_power(struct otg_transceiver *otg, unsigned mA)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
/*
* Gadget driver uses set_power method to notify about the
* available current based on suspend/configured states.
*
* IDEV_CHG can be drawn irrespective of suspend/un-configured
* states when CDP/ACA is connected.
*/
if (motg->chg_type == USB_SDP_CHARGER)
msm_otg_notify_charger(motg, mA);
return 0;
}
static void msm_otg_start_host(struct otg_transceiver *otg, int on)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
struct usb_hcd *hcd;
if (!otg->host)
return;
hcd = bus_to_hcd(otg->host);
if (on) {
dev_dbg(otg->dev, "host on\n");
/*
* Some boards have a switch cotrolled by gpio
* to enable/disable internal HUB. Enable internal
* HUB before kicking the host.
*/
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_A_HOST);
usb_add_hcd(hcd, hcd->irq, IRQF_SHARED);
} else {
dev_dbg(otg->dev, "host off\n");
usb_remove_hcd(hcd);
/* HCD core reset all bits of PORTSC. select ULPI phy */
writel_relaxed(0x80000000, USB_PORTSC);
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_UNDEFINED);
}
}
static int msm_otg_usbdev_notify(struct notifier_block *self,
unsigned long action, void *priv)
{
struct msm_otg *motg = container_of(self, struct msm_otg, usbdev_nb);
struct usb_device *udev = priv;
if (!aca_enabled())
goto out;
if (action == USB_BUS_ADD || action == USB_BUS_REMOVE)
goto out;
if (udev->bus != motg->otg.host)
goto out;
/*
* Interested in devices connected directly to the root hub.
* ACA dock can supply IDEV_CHG irrespective devices connected
* on the accessory port.
*/
if (!udev->parent || udev->parent->parent ||
motg->chg_type == USB_ACA_DOCK_CHARGER)
goto out;
switch (action) {
case USB_DEVICE_ADD:
usb_disable_autosuspend(udev);
/* fall through */
case USB_DEVICE_CONFIG:
if (udev->actconfig)
motg->mA_port = udev->actconfig->desc.bMaxPower * 2;
else
motg->mA_port = IUNIT;
break;
case USB_DEVICE_REMOVE:
motg->mA_port = IUNIT;
break;
default:
break;
}
if (test_bit(ID_A, &motg->inputs))
msm_otg_notify_charger(motg, IDEV_ACA_CHG_MAX -
motg->mA_port);
out:
return NOTIFY_OK;
}
static void msm_hsusb_vbus_power(struct msm_otg *motg, bool on)
{
int ret;
static bool vbus_is_on;
if (vbus_is_on == on)
return;
if (motg->pdata->vbus_power) {
motg->pdata->vbus_power(on);
return;
}
if (!vbus_otg) {
pr_err("vbus_otg is NULL.");
return;
}
/*
* if entering host mode tell the charger to not draw any current
* from usb - if exiting host mode let the charger draw current
*/
pm8921_disable_source_current(on);
if (on) {
ret = regulator_enable(vbus_otg);
if (ret) {
pr_err("unable to enable vbus_otg\n");
return;
}
vbus_is_on = true;
} else {
ret = regulator_disable(vbus_otg);
if (ret) {
pr_err("unable to disable vbus_otg\n");
return;
}
vbus_is_on = false;
}
}
static int msm_otg_set_host(struct otg_transceiver *otg, struct usb_bus *host)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct usb_hcd *hcd;
/*
* Fail host registration if this board can support
* only peripheral configuration.
*/
if (motg->pdata->mode == USB_PERIPHERAL) {
dev_info(otg->dev, "Host mode is not supported\n");
return -ENODEV;
}
if (!motg->pdata->vbus_power && host) {
vbus_otg = regulator_get(motg->otg.dev, "vbus_otg");
if (IS_ERR(vbus_otg)) {
pr_err("Unable to get vbus_otg\n");
return -ENODEV;
}
}
if (!host) {
if (otg->state == OTG_STATE_A_HOST) {
pm_runtime_get_sync(otg->dev);
usb_unregister_notify(&motg->usbdev_nb);
msm_otg_start_host(otg, 0);
msm_hsusb_vbus_power(motg, 0);
otg->host = NULL;
otg->state = OTG_STATE_UNDEFINED;
schedule_work(&motg->sm_work);
} else {
otg->host = NULL;
}
if (vbus_otg)
regulator_put(vbus_otg);
return 0;
}
hcd = bus_to_hcd(host);
hcd->power_budget = motg->pdata->power_budget;
motg->usbdev_nb.notifier_call = msm_otg_usbdev_notify;
usb_register_notify(&motg->usbdev_nb);
otg->host = host;
dev_dbg(otg->dev, "host driver registered w/ tranceiver\n");
/*
* Kick the state machine work, if peripheral is not supported
* or peripheral is already registered with us.
*/
if (motg->pdata->mode == USB_HOST || otg->gadget) {
pm_runtime_get_sync(otg->dev);
schedule_work(&motg->sm_work);
}
return 0;
}
static void msm_otg_start_peripheral(struct otg_transceiver *otg, int on)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
struct msm_otg_platform_data *pdata = motg->pdata;
if (!otg->gadget)
return;
if (on) {
dev_dbg(otg->dev, "gadget on\n");
/*
* Some boards have a switch cotrolled by gpio
* to enable/disable internal HUB. Disable internal
* HUB before kicking the gadget.
*/
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_B_PERIPHERAL);
/*
* vote for minimum dma_latency to prevent idle
* power collapse(pc) while running in peripheral mode.
*/
otg_pm_qos_update_latency(motg, 1);
usb_gadget_vbus_connect(otg->gadget);
} else {
dev_dbg(otg->dev, "gadget off\n");
usb_gadget_vbus_disconnect(otg->gadget);
otg_pm_qos_update_latency(motg, 0);
if (pdata->setup_gpio)
pdata->setup_gpio(OTG_STATE_UNDEFINED);
}
}
static int msm_otg_set_peripheral(struct otg_transceiver *otg,
struct usb_gadget *gadget)
{
struct msm_otg *motg = container_of(otg, struct msm_otg, otg);
/*
* Fail peripheral registration if this board can support
* only host configuration.
*/
if (motg->pdata->mode == USB_HOST) {
dev_info(otg->dev, "Peripheral mode is not supported\n");
return -ENODEV;
}
if (!gadget) {
if (otg->state == OTG_STATE_B_PERIPHERAL) {
pm_runtime_get_sync(otg->dev);
msm_otg_start_peripheral(otg, 0);
otg->gadget = NULL;
otg->state = OTG_STATE_UNDEFINED;
schedule_work(&motg->sm_work);
} else {
otg->gadget = NULL;
}
return 0;
}
otg->gadget = gadget;
dev_dbg(otg->dev, "peripheral driver registered w/ tranceiver\n");
/*
* Kick the state machine work, if host is not supported
* or host is already registered with us.
*/
if (motg->pdata->mode == USB_PERIPHERAL || otg->host) {
pm_runtime_get_sync(otg->dev);
schedule_work(&motg->sm_work);
}
return 0;
}
static bool msm_chg_aca_detect(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 int_sts;
bool ret = false;
if (!aca_enabled())
goto out;
if (motg->pdata->phy_type == CI_45NM_INTEGRATED_PHY)
goto out;
int_sts = ulpi_read(otg, 0x87);
switch (int_sts & 0x1C) {
case 0x08:
if (!test_and_set_bit(ID_A, &motg->inputs)) {
dev_dbg(otg->dev, "ID_A\n");
motg->chg_type = USB_ACA_A_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
clear_bit(ID_B, &motg->inputs);
clear_bit(ID_C, &motg->inputs);
set_bit(ID, &motg->inputs);
ret = true;
}
break;
case 0x0C:
if (!test_and_set_bit(ID_B, &motg->inputs)) {
dev_dbg(otg->dev, "ID_B\n");
motg->chg_type = USB_ACA_B_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
clear_bit(ID_A, &motg->inputs);
clear_bit(ID_C, &motg->inputs);
set_bit(ID, &motg->inputs);
ret = true;
}
break;
case 0x10:
if (!test_and_set_bit(ID_C, &motg->inputs)) {
dev_dbg(otg->dev, "ID_C\n");
motg->chg_type = USB_ACA_C_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
clear_bit(ID_A, &motg->inputs);
clear_bit(ID_B, &motg->inputs);
set_bit(ID, &motg->inputs);
ret = true;
}
break;
case 0x04:
if (test_and_clear_bit(ID, &motg->inputs)) {
dev_dbg(otg->dev, "ID_GND\n");
motg->chg_type = USB_INVALID_CHARGER;
motg->chg_state = USB_CHG_STATE_UNDEFINED;
clear_bit(ID_A, &motg->inputs);
clear_bit(ID_B, &motg->inputs);
clear_bit(ID_C, &motg->inputs);
ret = true;
}
break;
default:
ret = test_and_clear_bit(ID_A, &motg->inputs) |
test_and_clear_bit(ID_B, &motg->inputs) |
test_and_clear_bit(ID_C, &motg->inputs) |
!test_and_set_bit(ID, &motg->inputs);
if (ret) {
dev_dbg(otg->dev, "ID A/B/C/GND is no more\n");
motg->chg_type = USB_INVALID_CHARGER;
motg->chg_state = USB_CHG_STATE_UNDEFINED;
}
}
out:
return ret;
}
static void msm_chg_enable_aca_det(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
if (!aca_enabled())
return;
switch (motg->pdata->phy_type) {
case SNPS_28NM_INTEGRATED_PHY:
/* Disable ID_GND in link and PHY */
writel_relaxed(readl_relaxed(USB_OTGSC) & ~(OTGSC_IDPU |
OTGSC_IDIE), USB_OTGSC);
ulpi_write(otg, 0x01, 0x0C);
ulpi_write(otg, 0x10, 0x0F);
ulpi_write(otg, 0x10, 0x12);
/* Enable ACA ID detection */
ulpi_write(otg, 0x20, 0x85);
aca_id_turned_on = true;
break;
default:
break;
}
}
static void msm_chg_enable_aca_intr(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
if (!aca_enabled())
return;
switch (motg->pdata->phy_type) {
case SNPS_28NM_INTEGRATED_PHY:
/* Enable ACA Detection interrupt (on any RID change) */
ulpi_write(otg, 0x01, 0x94);
break;
default:
break;
}
}
static void msm_chg_disable_aca_intr(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
if (!aca_enabled())
return;
switch (motg->pdata->phy_type) {
case SNPS_28NM_INTEGRATED_PHY:
ulpi_write(otg, 0x01, 0x95);
break;
default:
break;
}
}
static bool msm_chg_check_aca_intr(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
bool ret = false;
if (!aca_enabled())
return ret;
switch (motg->pdata->phy_type) {
case SNPS_28NM_INTEGRATED_PHY:
if (ulpi_read(otg, 0x91) & 1) {
dev_dbg(otg->dev, "RID change\n");
ulpi_write(otg, 0x01, 0x92);
ret = msm_chg_aca_detect(motg);
}
default:
break;
}
return ret;
}
static void msm_otg_id_timer_func(unsigned long data)
{
struct msm_otg *motg = (struct msm_otg *) data;
if (!aca_enabled())
return;
if (atomic_read(&motg->in_lpm)) {
dev_dbg(motg->otg.dev, "timer: in lpm\n");
return;
}
if (msm_chg_check_aca_intr(motg)) {
dev_dbg(motg->otg.dev, "timer: aca work\n");
schedule_work(&motg->sm_work);
}
if (!test_bit(ID, &motg->inputs) || test_bit(ID_A, &motg->inputs))
mod_timer(&motg->id_timer, ID_TIMER_FREQ);
}
static bool msm_chg_check_secondary_det(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
bool ret = false;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
ret = chg_det & (1 << 4);
break;
case SNPS_28NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x87);
ret = chg_det & 1;
break;
default:
break;
}
return ret;
}
static void msm_chg_enable_secondary_det(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
/* Turn off charger block */
chg_det |= ~(1 << 1);
ulpi_write(otg, chg_det, 0x34);
udelay(20);
/* control chg block via ULPI */
chg_det &= ~(1 << 3);
ulpi_write(otg, chg_det, 0x34);
/* put it in host mode for enabling D- source */
chg_det &= ~(1 << 2);
ulpi_write(otg, chg_det, 0x34);
/* Turn on chg detect block */
chg_det &= ~(1 << 1);
ulpi_write(otg, chg_det, 0x34);
udelay(20);
/* enable chg detection */
chg_det &= ~(1 << 0);
ulpi_write(otg, chg_det, 0x34);
break;
case SNPS_28NM_INTEGRATED_PHY:
/*
* Configure DM as current source, DP as current sink
* and enable battery charging comparators.
*/
ulpi_write(otg, 0x8, 0x85);
ulpi_write(otg, 0x2, 0x85);
ulpi_write(otg, 0x1, 0x85);
break;
default:
break;
}
}
static bool msm_chg_check_primary_det(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
bool ret = false;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
ret = chg_det & (1 << 4);
break;
case SNPS_28NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x87);
ret = chg_det & 1;
break;
default:
break;
}
return ret;
}
static void msm_chg_enable_primary_det(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
/* enable chg detection */
chg_det &= ~(1 << 0);
ulpi_write(otg, chg_det, 0x34);
break;
case SNPS_28NM_INTEGRATED_PHY:
/*
* Configure DP as current source, DM as current sink
* and enable battery charging comparators.
*/
ulpi_write(otg, 0x2, 0x85);
ulpi_write(otg, 0x1, 0x85);
break;
default:
break;
}
}
static bool msm_chg_check_dcd(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 line_state;
bool ret = false;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
line_state = ulpi_read(otg, 0x15);
ret = !(line_state & 1);
break;
case SNPS_28NM_INTEGRATED_PHY:
line_state = ulpi_read(otg, 0x87);
ret = line_state & 2;
break;
default:
break;
}
return ret;
}
static void msm_chg_disable_dcd(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
chg_det &= ~(1 << 5);
ulpi_write(otg, chg_det, 0x34);
break;
case SNPS_28NM_INTEGRATED_PHY:
ulpi_write(otg, 0x10, 0x86);
break;
default:
break;
}
}
static void msm_chg_enable_dcd(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 chg_det;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
/* Turn on D+ current source */
chg_det |= (1 << 5);
ulpi_write(otg, chg_det, 0x34);
break;
case SNPS_28NM_INTEGRATED_PHY:
/* Data contact detection enable */
ulpi_write(otg, 0x10, 0x85);
break;
default:
break;
}
}
static void msm_chg_block_on(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 func_ctrl, chg_det;
/* put the controller in non-driving mode */
func_ctrl = ulpi_read(otg, ULPI_FUNC_CTRL);
func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
ulpi_write(otg, func_ctrl, ULPI_FUNC_CTRL);
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
/* control chg block via ULPI */
chg_det &= ~(1 << 3);
ulpi_write(otg, chg_det, 0x34);
/* Turn on chg detect block */
chg_det &= ~(1 << 1);
ulpi_write(otg, chg_det, 0x34);
udelay(20);
break;
case SNPS_28NM_INTEGRATED_PHY:
/* Clear charger detecting control bits */
ulpi_write(otg, 0x1F, 0x86);
/* Clear alt interrupt latch and enable bits */
ulpi_write(otg, 0x1F, 0x92);
ulpi_write(otg, 0x1F, 0x95);
udelay(100);
break;
default:
break;
}
}
static void msm_chg_block_off(struct msm_otg *motg)
{
struct otg_transceiver *otg = &motg->otg;
u32 func_ctrl, chg_det;
switch (motg->pdata->phy_type) {
case CI_45NM_INTEGRATED_PHY:
chg_det = ulpi_read(otg, 0x34);
/* Turn off charger block */
chg_det |= ~(1 << 1);
ulpi_write(otg, chg_det, 0x34);
break;
case SNPS_28NM_INTEGRATED_PHY:
/* Clear charger detecting control bits */
ulpi_write(otg, 0x3F, 0x86);
/* Clear alt interrupt latch and enable bits */
ulpi_write(otg, 0x1F, 0x92);
ulpi_write(otg, 0x1F, 0x95);
break;
default:
break;
}
/* put the controller in normal mode */
func_ctrl = ulpi_read(otg, ULPI_FUNC_CTRL);
func_ctrl &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
func_ctrl |= ULPI_FUNC_CTRL_OPMODE_NORMAL;
ulpi_write(otg, func_ctrl, ULPI_FUNC_CTRL);
}
static const char *chg_to_string(enum usb_chg_type chg_type)
{
switch (chg_type) {
case USB_SDP_CHARGER: return "USB_SDP_CHARGER";
case USB_DCP_CHARGER: return "USB_DCP_CHARGER";
case USB_CDP_CHARGER: return "USB_CDP_CHARGER";
case USB_ACA_A_CHARGER: return "USB_ACA_A_CHARGER";
case USB_ACA_B_CHARGER: return "USB_ACA_B_CHARGER";
case USB_ACA_C_CHARGER: return "USB_ACA_C_CHARGER";
case USB_ACA_DOCK_CHARGER: return "USB_ACA_DOCK_CHARGER";
default: return "INVALID_CHARGER";
}
}
#define MSM_CHG_DCD_POLL_TIME (100 * HZ/1000) /* 100 msec */
#define MSM_CHG_DCD_MAX_RETRIES 6 /* Tdcd_tmout = 6 * 100 msec */
#define MSM_CHG_PRIMARY_DET_TIME (40 * HZ/1000) /* TVDPSRC_ON */
#define MSM_CHG_SECONDARY_DET_TIME (40 * HZ/1000) /* TVDMSRC_ON */
static void msm_chg_detect_work(struct work_struct *w)
{
struct msm_otg *motg = container_of(w, struct msm_otg, chg_work.work);
struct otg_transceiver *otg = &motg->otg;
bool is_dcd, tmout, vout, is_aca;
unsigned long delay;
dev_dbg(otg->dev, "chg detection work\n");
switch (motg->chg_state) {
case USB_CHG_STATE_UNDEFINED:
msm_chg_block_on(motg);
msm_chg_enable_dcd(motg);
msm_chg_enable_aca_det(motg);
motg->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
motg->dcd_retries = 0;
delay = MSM_CHG_DCD_POLL_TIME;
break;
case USB_CHG_STATE_WAIT_FOR_DCD:
is_aca = msm_chg_aca_detect(motg);
if (is_aca) {
/*
* ID_A can be ACA dock too. continue
* primary detection after DCD.
*/
if (test_bit(ID_A, &motg->inputs)) {
motg->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
} else {
delay = 0;
break;
}
}
is_dcd = msm_chg_check_dcd(motg);
tmout = ++motg->dcd_retries == MSM_CHG_DCD_MAX_RETRIES;
if (is_dcd || tmout) {
msm_chg_disable_dcd(motg);
msm_chg_enable_primary_det(motg);
delay = MSM_CHG_PRIMARY_DET_TIME;
motg->chg_state = USB_CHG_STATE_DCD_DONE;
} else {
delay = MSM_CHG_DCD_POLL_TIME;
}
break;
case USB_CHG_STATE_DCD_DONE:
vout = msm_chg_check_primary_det(motg);
if (vout) {
if (test_bit(ID_A, &motg->inputs)) {
motg->chg_type = USB_ACA_DOCK_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
delay = 0;
break;
}
msm_chg_enable_secondary_det(motg);
delay = MSM_CHG_SECONDARY_DET_TIME;
motg->chg_state = USB_CHG_STATE_PRIMARY_DONE;
} else {
if (test_bit(ID_A, &motg->inputs)) {
motg->chg_type = USB_ACA_A_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
delay = 0;
break;
}
motg->chg_type = USB_SDP_CHARGER;
motg->chg_state = USB_CHG_STATE_DETECTED;
delay = 0;
}
break;
case USB_CHG_STATE_PRIMARY_DONE:
vout = msm_chg_check_secondary_det(motg);
if (vout)
motg->chg_type = USB_DCP_CHARGER;
else
motg->chg_type = USB_CDP_CHARGER;
motg->chg_state = USB_CHG_STATE_SECONDARY_DONE;
/* fall through */
case USB_CHG_STATE_SECONDARY_DONE:
motg->chg_state = USB_CHG_STATE_DETECTED;
case USB_CHG_STATE_DETECTED:
msm_chg_block_off(motg);
msm_chg_enable_aca_det(motg);
msm_chg_enable_aca_intr(motg);
dev_dbg(otg->dev, "chg_type = %s\n",
chg_to_string(motg->chg_type));
schedule_work(&motg->sm_work);
return;
default:
return;
}
schedule_delayed_work(&motg->chg_work, delay);
}
/*
* We support OTG, Peripheral only and Host only configurations. In case
* of OTG, mode switch (host-->peripheral/peripheral-->host) can happen
* via Id pin status or user request (debugfs). Id/BSV interrupts are not
* enabled when switch is controlled by user and default mode is supplied
* by board file, which can be changed by userspace later.
*/
static void msm_otg_init_sm(struct msm_otg *motg)
{
struct msm_otg_platform_data *pdata = motg->pdata;
u32 otgsc = readl(USB_OTGSC);
switch (pdata->mode) {
case USB_OTG:
if (pdata->otg_control == OTG_USER_CONTROL) {
if (pdata->default_mode == USB_HOST) {
clear_bit(ID, &motg->inputs);
} else if (pdata->default_mode == USB_PERIPHERAL) {
set_bit(ID, &motg->inputs);
set_bit(B_SESS_VLD, &motg->inputs);
} else {
set_bit(ID, &motg->inputs);
clear_bit(B_SESS_VLD, &motg->inputs);
}
} else if (pdata->otg_control == OTG_PHY_CONTROL) {
if (otgsc & OTGSC_ID)
set_bit(ID, &motg->inputs);
else
clear_bit(ID, &motg->inputs);
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
else
clear_bit(B_SESS_VLD, &motg->inputs);
} else if (pdata->otg_control == OTG_PMIC_CONTROL) {
if (pdata->pmic_id_irq) {
if (irq_read_line(pdata->pmic_id_irq))
set_bit(ID, &motg->inputs);
else
clear_bit(ID, &motg->inputs);
}
/*
* VBUS initial state is reported after PMIC
* driver initialization. Wait for it.
*/
wait_for_completion(&pmic_vbus_init);
}
break;
case USB_HOST:
clear_bit(ID, &motg->inputs);
break;
case USB_PERIPHERAL:
set_bit(ID, &motg->inputs);
if (pdata->otg_control == OTG_PHY_CONTROL) {
if (otgsc & OTGSC_BSV)
set_bit(B_SESS_VLD, &motg->inputs);
else
clear_bit(B_SESS_VLD, &motg->inputs);
} else if (pdata->otg_control == OTG_PMIC_CONTROL) {
/*
* VBUS initial state is reported after PMIC
* driver initialization. Wait for it.
*/
wait_for_completion(&pmic_vbus_init);
}
break;
default:
break;
}
}
static void msm_otg_sm_work(struct work_struct *w)
{
struct msm_otg *motg = container_of(w, struct msm_otg, sm_work);
struct otg_transceiver *otg = &motg->otg;
pm_runtime_resume(otg->dev);
switch (otg->state) {
case OTG_STATE_UNDEFINED:
dev_dbg(otg->dev, "OTG_STATE_UNDEFINED state\n");
msm_otg_reset(otg);
msm_otg_init_sm(motg);
otg->state = OTG_STATE_B_IDLE;
if (!test_bit(B_SESS_VLD, &motg->inputs) &&
test_bit(ID, &motg->inputs)) {
pm_runtime_put_noidle(otg->dev);
pm_runtime_suspend(otg->dev);
break;
}
/* FALL THROUGH */
case OTG_STATE_B_IDLE:
dev_dbg(otg->dev, "OTG_STATE_B_IDLE state\n");
if ((!test_bit(ID, &motg->inputs) ||
test_bit(ID_A, &motg->inputs)) && otg->host) {
if (motg->chg_type == USB_ACA_DOCK_CHARGER)
msm_otg_notify_charger(motg,
IDEV_ACA_CHG_MAX);
else if (test_bit(ID_A, &motg->inputs))
msm_otg_notify_charger(motg,
IDEV_ACA_CHG_MAX - IUNIT);
else
msm_hsusb_vbus_power(motg, 1);
msm_otg_start_host(otg, 1);
/*
* Link can not generate PHY_ALT interrupt
* in host mode when no device is attached
* to the port. It is also observed PHY_ALT
* interrupt missing upon Micro-A cable disconnect.
* Hence disable PHY_ALT interrupt and perform
* polling to detect RID change.
*/
msm_chg_enable_aca_det(motg);
msm_chg_disable_aca_intr(motg);
mod_timer(&motg->id_timer, ID_TIMER_FREQ);
otg->state = OTG_STATE_A_HOST;
} else if (test_bit(B_SESS_VLD, &motg->inputs)) {
switch (motg->chg_state) {
case USB_CHG_STATE_UNDEFINED:
msm_chg_detect_work(&motg->chg_work.work);
break;
case USB_CHG_STATE_DETECTED:
switch (motg->chg_type) {
case USB_DCP_CHARGER:
msm_otg_notify_charger(motg,
IDEV_CHG_MAX);
pm_runtime_put_noidle(otg->dev);
pm_runtime_suspend(otg->dev);
break;
case USB_ACA_B_CHARGER:
msm_otg_notify_charger(motg,
IDEV_ACA_CHG_MAX);
/*
* (ID_B --> ID_C) PHY_ALT interrupt can
* not be detected in LPM.
*/
break;
case USB_CDP_CHARGER:
msm_otg_notify_charger(motg,
IDEV_CHG_MAX);
msm_otg_start_peripheral(otg, 1);
otg->state = OTG_STATE_B_PERIPHERAL;
break;
case USB_ACA_C_CHARGER:
msm_otg_notify_charger(motg,
IDEV_ACA_CHG_MAX);
msm_otg_start_peripheral(otg, 1);
otg->state = OTG_STATE_B_PERIPHERAL;
break;
case USB_SDP_CHARGER:
msm_otg_notify_charger(motg, IUNIT);
msm_otg_start_peripheral(otg, 1);
otg->state = OTG_STATE_B_PERIPHERAL;
break;
default:
break;
}
break;
default:
break;
}
} else {
cancel_delayed_work_sync(&motg->chg_work);
msm_otg_notify_charger(motg, 0);
motg->chg_state = USB_CHG_STATE_UNDEFINED;
motg->chg_type = USB_INVALID_CHARGER;
msm_otg_reset(otg);
pm_runtime_put_noidle(otg->dev);
pm_runtime_suspend(otg->dev);
}
break;
case OTG_STATE_B_PERIPHERAL:
dev_dbg(otg->dev, "OTG_STATE_B_PERIPHERAL state\n");
if (!test_bit(B_SESS_VLD, &motg->inputs) ||
!test_bit(ID, &motg->inputs) ||
!test_bit(ID_C, &motg->inputs)) {
msm_otg_start_peripheral(otg, 0);
otg->state = OTG_STATE_B_IDLE;
schedule_work(w);
} else if (test_bit(ID_C, &motg->inputs)) {
msm_otg_notify_charger(motg, IDEV_ACA_CHG_MAX);
}
break;
case OTG_STATE_A_HOST:
dev_dbg(otg->dev, "OTG_STATE_A_HOST state\n");
if (test_bit(ID, &motg->inputs) &&
!test_bit(ID_A, &motg->inputs)) {
msm_otg_start_host(otg, 0);
msm_hsusb_vbus_power(motg, 0);
msleep(100); /* TA_WAIT_VFALL */
/*
* Exit point of host mode.
*
* 1. Micro-A cable disconnect: Just schedule
* the work. PHY is reset in B_IDLE and LPM
* is allowed.
* 2. ID_GND --> ID_B: No need to reset the PHY.
* HCD core clears all PORTSC bits and initializes
* the controller to host mode in remove_hcd.
* Restore PORTSC transceiver select bits (ULPI)
* and reset the controller to change MODE bits.
* PHY_ALT interrupt can not occur in host mode.
*/
del_timer_sync(&motg->id_timer);
if (motg->chg_state != USB_CHG_STATE_UNDEFINED) {
msm_otg_link_reset(motg);
msm_chg_enable_aca_intr(motg);
}
otg->state = OTG_STATE_B_IDLE;
schedule_work(w);
} else if (test_bit(ID_A, &motg->inputs)) {
msm_hsusb_vbus_power(motg, 0);
msm_otg_notify_charger(motg,
IDEV_ACA_CHG_MAX - motg->mA_port);
} else if (!test_bit(ID, &motg->inputs)) {
msm_otg_notify_charger(motg, 0);
msm_hsusb_vbus_power(motg, 1);
}
break;
default:
break;
}
}
static irqreturn_t msm_otg_irq(int irq, void *data)
{
struct msm_otg *motg = data;
struct otg_transceiver *otg = &motg->otg;
u32 otgsc = 0, usbsts;
if (atomic_read(&motg->in_lpm)) {
pr_debug("OTG IRQ: in LPM\n");
disable_irq_nosync(irq);
motg->async_int = 1;
pm_request_resume(otg->dev);
return IRQ_HANDLED;
}
usbsts = readl(USB_USBSTS);
if ((usbsts & PHY_ALT_INT)) {
dev_dbg(otg->dev, "PHY_ALT interrupt\n");
writel(PHY_ALT_INT, USB_USBSTS);
if (msm_chg_check_aca_intr(motg)) {
dev_dbg(otg->dev, "ACA work from IRQ\n");
schedule_work(&motg->sm_work);
}
return IRQ_HANDLED;
}
otgsc = readl(USB_OTGSC);
if (!(otgsc & (OTGSC_IDIS | OTGSC_BSVIS)))
return IRQ_NONE;
if ((otgsc & OTGSC_IDIS) && (otgsc & OTGSC_IDIE)) {
if (otgsc & OTGSC_ID) {
dev_dbg(otg->dev, "ID set\n");
set_bit(ID, &motg->inputs);
} else {
dev_dbg(otg->dev, "ID clear\n");
clear_bit(ID, &motg->inputs);
msm_chg_enable_aca_det(motg);
}
schedule_work(&motg->sm_work);
} else if ((otgsc & OTGSC_BSVIS) && (otgsc & OTGSC_BSVIE)) {
if (otgsc & OTGSC_BSV) {
dev_dbg(otg->dev, "BSV set\n");
set_bit(B_SESS_VLD, &motg->inputs);
} else {
dev_dbg(otg->dev, "BSV clear\n");
clear_bit(B_SESS_VLD, &motg->inputs);
msm_chg_check_aca_intr(motg);
}
schedule_work(&motg->sm_work);
}
writel(otgsc, USB_OTGSC);
return IRQ_HANDLED;
}
static void msm_otg_set_vbus_state(int online)
{
static bool init;
struct msm_otg *motg = the_msm_otg;
if (online) {
pr_debug("PMIC: BSV set\n");
set_bit(B_SESS_VLD, &motg->inputs);
} else {
pr_debug("PMIC: BSV clear\n");
clear_bit(B_SESS_VLD, &motg->inputs);
}
if (!init) {
init = true;
complete(&pmic_vbus_init);
pr_debug("PMIC: BSV init complete\n");
return;
}
schedule_work(&motg->sm_work);
}
static irqreturn_t msm_pmic_id_irq(int irq, void *data)
{
struct msm_otg *motg = data;
if (aca_id_turned_on)
return IRQ_HANDLED;
if (irq_read_line(motg->pdata->pmic_id_irq)) {
pr_debug("PMIC: ID set\n");
set_bit(ID, &motg->inputs);
} else {
pr_debug("PMIC: ID clear\n");
clear_bit(ID, &motg->inputs);
}
if (motg->otg.state != OTG_STATE_UNDEFINED)
schedule_work(&motg->sm_work);
return IRQ_HANDLED;
}
static int msm_otg_mode_show(struct seq_file *s, void *unused)
{
struct msm_otg *motg = s->private;
struct otg_transceiver *otg = &motg->otg;
switch (otg->state) {
case OTG_STATE_A_HOST:
seq_printf(s, "host\n");
break;
case OTG_STATE_B_PERIPHERAL:
seq_printf(s, "peripheral\n");
break;
default:
seq_printf(s, "none\n");
break;
}
return 0;
}
static int msm_otg_mode_open(struct inode *inode, struct file *file)
{
return single_open(file, msm_otg_mode_show, inode->i_private);
}
static ssize_t msm_otg_mode_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
struct seq_file *s = file->private_data;
struct msm_otg *motg = s->private;
char buf[16];
struct otg_transceiver *otg = &motg->otg;
int status = count;
enum usb_mode_type req_mode;
memset(buf, 0x00, sizeof(buf));
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count))) {
status = -EFAULT;
goto out;
}
if (!strncmp(buf, "host", 4)) {
req_mode = USB_HOST;
} else if (!strncmp(buf, "peripheral", 10)) {
req_mode = USB_PERIPHERAL;
} else if (!strncmp(buf, "none", 4)) {
req_mode = USB_NONE;
} else {
status = -EINVAL;
goto out;
}
switch (req_mode) {
case USB_NONE:
switch (otg->state) {
case OTG_STATE_A_HOST:
case OTG_STATE_B_PERIPHERAL:
set_bit(ID, &motg->inputs);
clear_bit(B_SESS_VLD, &motg->inputs);
break;
default:
goto out;
}
break;
case USB_PERIPHERAL:
switch (otg->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_A_HOST:
set_bit(ID, &motg->inputs);
set_bit(B_SESS_VLD, &motg->inputs);
break;
default:
goto out;
}
break;
case USB_HOST:
switch (otg->state) {
case OTG_STATE_B_IDLE:
case OTG_STATE_B_PERIPHERAL:
clear_bit(ID, &motg->inputs);
break;
default:
goto out;
}
break;
default:
goto out;
}
pm_runtime_resume(otg->dev);
schedule_work(&motg->sm_work);
out:
return status;
}
const struct file_operations msm_otg_mode_fops = {
.open = msm_otg_mode_open,
.read = seq_read,
.write = msm_otg_mode_write,
.llseek = seq_lseek,
.release = single_release,
};
static int msm_otg_show_chg_type(struct seq_file *s, void *unused)
{
struct msm_otg *motg = s->private;
seq_printf(s, "%s\n", chg_to_string(motg->chg_type));
return 0;
}
static int msm_otg_chg_open(struct inode *inode, struct file *file)
{
return single_open(file, msm_otg_show_chg_type, inode->i_private);
}
const struct file_operations msm_otg_chg_fops = {
.open = msm_otg_chg_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int msm_otg_aca_show(struct seq_file *s, void *unused)
{
if (debug_aca_enabled)
seq_printf(s, "enabled\n");
else
seq_printf(s, "disabled\n");
return 0;
}
static int msm_otg_aca_open(struct inode *inode, struct file *file)
{
return single_open(file, msm_otg_aca_show, inode->i_private);
}
static ssize_t msm_otg_aca_write(struct file *file, const char __user *ubuf,
size_t count, loff_t *ppos)
{
char buf[8];
memset(buf, 0x00, sizeof(buf));
if (copy_from_user(&buf, ubuf, min_t(size_t, sizeof(buf) - 1, count)))
return -EFAULT;
if (!strncmp(buf, "enable", 6))
debug_aca_enabled = true;
else
debug_aca_enabled = false;
return count;
}
const struct file_operations msm_otg_aca_fops = {
.open = msm_otg_aca_open,
.read = seq_read,
.write = msm_otg_aca_write,
.llseek = seq_lseek,
.release = single_release,
};
static struct dentry *msm_otg_dbg_root;
static struct dentry *msm_otg_dbg_mode;
static struct dentry *msm_otg_chg_type;
static struct dentry *msm_otg_dbg_aca;
static int msm_otg_debugfs_init(struct msm_otg *motg)
{
msm_otg_dbg_root = debugfs_create_dir("msm_otg", NULL);
if (!msm_otg_dbg_root || IS_ERR(msm_otg_dbg_root))
return -ENODEV;
if (motg->pdata->mode == USB_OTG &&
motg->pdata->otg_control == OTG_USER_CONTROL) {
msm_otg_dbg_mode = debugfs_create_file("mode", S_IRUGO |
S_IWUSR, msm_otg_dbg_root, motg,
&msm_otg_mode_fops);
if (!msm_otg_dbg_mode) {
debugfs_remove(msm_otg_dbg_root);
msm_otg_dbg_root = NULL;
return -ENODEV;
}
}
msm_otg_chg_type = debugfs_create_file("chg_type", S_IRUGO,
msm_otg_dbg_root, motg,
&msm_otg_chg_fops);
if (!msm_otg_chg_type) {
debugfs_remove_recursive(msm_otg_dbg_root);
return -ENODEV;
}
msm_otg_dbg_aca = debugfs_create_file("aca", S_IRUGO | S_IWUSR,
msm_otg_dbg_root, motg,
&msm_otg_aca_fops);
if (!msm_otg_dbg_aca) {
debugfs_remove_recursive(msm_otg_dbg_root);
return -ENODEV;
}
return 0;
}
static void msm_otg_debugfs_cleanup(void)
{
debugfs_remove_recursive(msm_otg_dbg_root);
}
static u64 msm_otg_dma_mask = DMA_BIT_MASK(64);
static struct platform_device *msm_otg_add_pdev(
struct platform_device *ofdev, const char *name)
{
struct platform_device *pdev;
const struct resource *res = ofdev->resource;
unsigned int num = ofdev->num_resources;
int retval;
pdev = platform_device_alloc(name, -1);
if (!pdev) {
retval = -ENOMEM;
goto error;
}
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
pdev->dev.dma_mask = &msm_otg_dma_mask;
if (num) {
retval = platform_device_add_resources(pdev, res, num);
if (retval)
goto error;
}
retval = platform_device_add(pdev);
if (retval)
goto error;
return pdev;
error:
platform_device_put(pdev);
return ERR_PTR(retval);
}
static int msm_otg_setup_devices(struct platform_device *ofdev,
enum usb_mode_type mode, bool init)
{
const char *gadget_name = "msm_hsusb";
const char *host_name = "msm_hsusb_host";
static struct platform_device *gadget_pdev;
static struct platform_device *host_pdev;
int retval = 0;
if (!init) {
if (gadget_pdev)
platform_device_unregister(gadget_pdev);
if (host_pdev)
platform_device_unregister(host_pdev);
return 0;
}
switch (mode) {
case USB_OTG:
/* fall through */
case USB_PERIPHERAL:
gadget_pdev = msm_otg_add_pdev(ofdev, gadget_name);
if (IS_ERR(gadget_pdev)) {
retval = PTR_ERR(gadget_pdev);
break;
}
if (mode == USB_PERIPHERAL)
break;
/* fall through */
case USB_HOST:
host_pdev = msm_otg_add_pdev(ofdev, host_name);
if (IS_ERR(host_pdev)) {
retval = PTR_ERR(host_pdev);
if (mode == USB_OTG)
platform_device_unregister(gadget_pdev);
}
break;
default:
break;
}
return retval;
}
struct msm_otg_platform_data *msm_otg_dt_to_pdata(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct msm_otg_platform_data *pdata;
int len = 0;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata) {
pr_err("unable to allocate platform data\n");
return NULL;
}
of_get_property(node, "qcom,hsusb-otg-phy-init-seq", &len);
if (len) {
pdata->phy_init_seq = devm_kzalloc(&pdev->dev, len, GFP_KERNEL);
if (!pdata->phy_init_seq)
return NULL;
of_property_read_u32_array(node, "qcom,hsusb-otg-phy-init-seq",
pdata->phy_init_seq,
len/sizeof(*pdata->phy_init_seq));
}
of_property_read_u32(node, "qcom,hsusb-otg-power-budget",
&pdata->power_budget);
of_property_read_u32(node, "qcom,hsusb-otg-mode",
&pdata->mode);
of_property_read_u32(node, "qcom,hsusb-otg-otg-control",
&pdata->otg_control);
of_property_read_u32(node, "qcom,hsusb-otg-default-mode",
&pdata->default_mode);
of_property_read_u32(node, "qcom,hsusb-otg-phy-type",
&pdata->phy_type);
of_property_read_u32(node, "qcom,hsusb-otg-pmic-id-irq",
&pdata->pmic_id_irq);
return pdata;
}
static int __init msm_otg_probe(struct platform_device *pdev)
{
int ret = 0;
struct resource *res;
struct msm_otg *motg;
struct otg_transceiver *otg;
struct msm_otg_platform_data *pdata;
dev_info(&pdev->dev, "msm_otg probe\n");
if (pdev->dev.of_node) {
dev_dbg(&pdev->dev, "device tree enabled\n");
pdata = msm_otg_dt_to_pdata(pdev);
if (!pdata)
return -ENOMEM;
ret = msm_otg_setup_devices(pdev, pdata->mode, true);
if (ret) {
dev_err(&pdev->dev, "devices setup failed\n");
return ret;
}
} else if (!pdev->dev.platform_data) {
dev_err(&pdev->dev, "No platform data given. Bailing out\n");
return -ENODEV;
} else {
pdata = pdev->dev.platform_data;
}
motg = kzalloc(sizeof(struct msm_otg), GFP_KERNEL);
if (!motg) {
dev_err(&pdev->dev, "unable to allocate msm_otg\n");
return -ENOMEM;
}
the_msm_otg = motg;
motg->pdata = pdata;
otg = &motg->otg;
otg->dev = &pdev->dev;
/*
* ACA ID_GND threshold range is overlapped with OTG ID_FLOAT. Hence
* PHY treat ACA ID_GND as float and no interrupt is generated. But
* PMIC can detect ACA ID_GND and generate an interrupt.
*/
if (aca_enabled() && motg->pdata->otg_control != OTG_PMIC_CONTROL) {
dev_err(&pdev->dev, "ACA can not be enabled without PMIC\n");
ret = -EINVAL;
goto free_motg;
}
/* initialize reset counter */
motg->reset_counter = 0;
/* Some targets don't support PHY clock. */
motg->phy_reset_clk = clk_get(&pdev->dev, "phy_clk");
if (IS_ERR(motg->phy_reset_clk))
dev_err(&pdev->dev, "failed to get phy_clk\n");
motg->clk = clk_get(&pdev->dev, "alt_core_clk");
if (IS_ERR(motg->clk)) {
dev_err(&pdev->dev, "failed to get alt_core_clk\n");
ret = PTR_ERR(motg->clk);
goto put_phy_reset_clk;
}
clk_set_rate(motg->clk, 60000000);
/* pm qos request to prevent apps idle power collapse */
if (motg->pdata->swfi_latency)
pm_qos_add_request(&motg->pm_qos_req_dma,
PM_QOS_CPU_DMA_LATENCY, PM_QOS_DEFAULT_VALUE);
/*
* USB Core is running its protocol engine based on CORE CLK,
* CORE CLK must be running at >55Mhz for correct HSUSB
* operation and USB core cannot tolerate frequency changes on
* CORE CLK. For such USB cores, vote for maximum clk frequency
* on pclk source
*/
motg->core_clk = clk_get(&pdev->dev, "core_clk");
if (IS_ERR(motg->core_clk)) {
motg->core_clk = NULL;
dev_err(&pdev->dev, "failed to get core_clk\n");
ret = PTR_ERR(motg->clk);
goto put_clk;
}
clk_set_rate(motg->core_clk, INT_MAX);
motg->pclk = clk_get(&pdev->dev, "iface_clk");
if (IS_ERR(motg->pclk)) {
dev_err(&pdev->dev, "failed to get iface_clk\n");
ret = PTR_ERR(motg->pclk);
goto put_core_clk;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get platform resource mem\n");
ret = -ENODEV;
goto put_pclk;
}
motg->regs = ioremap(res->start, resource_size(res));
if (!motg->regs) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto put_pclk;
}
dev_info(&pdev->dev, "OTG regs = %p\n", motg->regs);
motg->irq = platform_get_irq(pdev, 0);
if (!motg->irq) {
dev_err(&pdev->dev, "platform_get_irq failed\n");
ret = -ENODEV;
goto free_regs;
}
motg->xo_handle = msm_xo_get(MSM_XO_TCXO_D0, "usb");
if (IS_ERR(motg->xo_handle)) {
dev_err(&pdev->dev, "%s not able to get the handle "
"to vote for TCXO D0 buffer\n", __func__);
ret = PTR_ERR(motg->xo_handle);
goto free_regs;
}
ret = msm_xo_mode_vote(motg->xo_handle, MSM_XO_MODE_ON);
if (ret) {
dev_err(&pdev->dev, "%s failed to vote for TCXO "
"D0 buffer%d\n", __func__, ret);
goto free_xo_handle;
}
clk_enable(motg->pclk);
ret = msm_hsusb_init_vddcx(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vddcx init failed\n");
goto devote_xo_handle;
}
ret = msm_hsusb_config_vddcx(1);
if (ret) {
dev_err(&pdev->dev, "hsusb vddcx configuration failed\n");
goto free_init_vddcx;
}
ret = msm_hsusb_ldo_init(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vreg configuration failed\n");
goto free_init_vddcx;
}
ret = msm_hsusb_ldo_enable(motg, 1);
if (ret) {
dev_err(&pdev->dev, "hsusb vreg enable failed\n");
goto free_ldo_init;
}
clk_enable(motg->core_clk);
writel(0, USB_USBINTR);
writel(0, USB_OTGSC);
/* Ensure that above STOREs are completed before enabling interrupts */
mb();
wake_lock_init(&motg->wlock, WAKE_LOCK_SUSPEND, "msm_otg");
INIT_WORK(&motg->sm_work, msm_otg_sm_work);
INIT_DELAYED_WORK(&motg->chg_work, msm_chg_detect_work);
setup_timer(&motg->id_timer, msm_otg_id_timer_func,
(unsigned long) motg);
ret = request_irq(motg->irq, msm_otg_irq, IRQF_SHARED,
"msm_otg", motg);
if (ret) {
dev_err(&pdev->dev, "request irq failed\n");
goto destroy_wlock;
}
otg->init = msm_otg_reset;
otg->set_host = msm_otg_set_host;
otg->set_peripheral = msm_otg_set_peripheral;
otg->set_power = msm_otg_set_power;
otg->set_suspend = msm_otg_set_suspend;
otg->io_ops = &msm_otg_io_ops;
ret = otg_set_transceiver(&motg->otg);
if (ret) {
dev_err(&pdev->dev, "otg_set_transceiver failed\n");
goto free_irq;
}
if (motg->pdata->mode == USB_OTG &&
motg->pdata->otg_control == OTG_PMIC_CONTROL) {
if (motg->pdata->pmic_id_irq) {
ret = request_irq(motg->pdata->pmic_id_irq,
msm_pmic_id_irq,
IRQF_TRIGGER_RISING |
IRQF_TRIGGER_FALLING,
"msm_otg", motg);
if (ret) {
dev_err(&pdev->dev, "request irq failed for PMIC ID\n");
goto remove_otg;
}
} else {
ret = -ENODEV;
dev_err(&pdev->dev, "PMIC IRQ for ID notifications doesn't exist\n");
goto remove_otg;
}
}
msm_hsusb_mhl_switch_enable(motg, 1);
platform_set_drvdata(pdev, motg);
device_init_wakeup(&pdev->dev, 1);
motg->mA_port = IUNIT;
ret = msm_otg_debugfs_init(motg);
if (ret)
dev_dbg(&pdev->dev, "mode debugfs file is"
"not available\n");
if (motg->pdata->otg_control == OTG_PMIC_CONTROL)
pm8921_charger_register_vbus_sn(&msm_otg_set_vbus_state);
if (motg->pdata->phy_type == SNPS_28NM_INTEGRATED_PHY) {
if (motg->pdata->otg_control == OTG_PMIC_CONTROL &&
(!(motg->pdata->mode == USB_OTG) ||
motg->pdata->pmic_id_irq))
motg->caps = ALLOW_PHY_POWER_COLLAPSE |
ALLOW_PHY_RETENTION |
ALLOW_PHY_COMP_DISABLE;
if (motg->pdata->otg_control == OTG_PHY_CONTROL)
motg->caps = ALLOW_PHY_RETENTION;
}
wake_lock(&motg->wlock);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
return 0;
remove_otg:
otg_set_transceiver(NULL);
free_irq:
free_irq(motg->irq, motg);
destroy_wlock:
wake_lock_destroy(&motg->wlock);
clk_disable(motg->core_clk);
msm_hsusb_ldo_enable(motg, 0);
free_ldo_init:
msm_hsusb_ldo_init(motg, 0);
free_init_vddcx:
msm_hsusb_init_vddcx(motg, 0);
devote_xo_handle:
clk_disable(motg->pclk);
msm_xo_mode_vote(motg->xo_handle, MSM_XO_MODE_OFF);
free_xo_handle:
msm_xo_put(motg->xo_handle);
free_regs:
iounmap(motg->regs);
put_pclk:
clk_put(motg->pclk);
put_core_clk:
clk_put(motg->core_clk);
put_clk:
clk_put(motg->clk);
put_phy_reset_clk:
if (!IS_ERR(motg->phy_reset_clk))
clk_put(motg->phy_reset_clk);
free_motg:
if (motg->pdata->swfi_latency)
pm_qos_remove_request(&motg->pm_qos_req_dma);
kfree(motg);
return ret;
}
static int __devexit msm_otg_remove(struct platform_device *pdev)
{
struct msm_otg *motg = platform_get_drvdata(pdev);
struct otg_transceiver *otg = &motg->otg;
int cnt = 0;
if (otg->host || otg->gadget)
return -EBUSY;
if (pdev->dev.of_node)
msm_otg_setup_devices(pdev, motg->pdata->mode, false);
if (motg->pdata->otg_control == OTG_PMIC_CONTROL)
pm8921_charger_unregister_vbus_sn(0);
msm_otg_debugfs_cleanup();
cancel_delayed_work_sync(&motg->chg_work);
cancel_work_sync(&motg->sm_work);
pm_runtime_resume(&pdev->dev);
device_init_wakeup(&pdev->dev, 0);
pm_runtime_disable(&pdev->dev);
wake_lock_destroy(&motg->wlock);
msm_hsusb_mhl_switch_enable(motg, 0);
if (motg->pdata->pmic_id_irq)
free_irq(motg->pdata->pmic_id_irq, motg);
otg_set_transceiver(NULL);
free_irq(motg->irq, motg);
/*
* Put PHY in low power mode.
*/
ulpi_read(otg, 0x14);
ulpi_write(otg, 0x08, 0x09);
writel(readl(USB_PORTSC) | PORTSC_PHCD, USB_PORTSC);
while (cnt < PHY_SUSPEND_TIMEOUT_USEC) {
if (readl(USB_PORTSC) & PORTSC_PHCD)
break;
udelay(1);
cnt++;
}
if (cnt >= PHY_SUSPEND_TIMEOUT_USEC)
dev_err(otg->dev, "Unable to suspend PHY\n");
clk_disable(motg->pclk);
clk_disable(motg->core_clk);
msm_xo_put(motg->xo_handle);
msm_hsusb_ldo_enable(motg, 0);
msm_hsusb_ldo_init(motg, 0);
msm_hsusb_init_vddcx(motg, 0);
iounmap(motg->regs);
pm_runtime_set_suspended(&pdev->dev);
if (!IS_ERR(motg->phy_reset_clk))
clk_put(motg->phy_reset_clk);
clk_put(motg->pclk);
clk_put(motg->clk);
clk_put(motg->core_clk);
if (motg->pdata->swfi_latency)
pm_qos_remove_request(&motg->pm_qos_req_dma);
kfree(motg);
return 0;
}
#ifdef CONFIG_PM_RUNTIME
static int msm_otg_runtime_idle(struct device *dev)
{
struct msm_otg *motg = dev_get_drvdata(dev);
struct otg_transceiver *otg = &motg->otg;
dev_dbg(dev, "OTG runtime idle\n");
if (otg->state == OTG_STATE_UNDEFINED)
return -EAGAIN;
else
return 0;
}
static int msm_otg_runtime_suspend(struct device *dev)
{
struct msm_otg *motg = dev_get_drvdata(dev);
dev_dbg(dev, "OTG runtime suspend\n");
return msm_otg_suspend(motg);
}
static int msm_otg_runtime_resume(struct device *dev)
{
struct msm_otg *motg = dev_get_drvdata(dev);
dev_dbg(dev, "OTG runtime resume\n");
pm_runtime_get_noresume(dev);
return msm_otg_resume(motg);
}
#endif
#ifdef CONFIG_PM_SLEEP
static int msm_otg_pm_suspend(struct device *dev)
{
int ret;
dev_dbg(dev, "OTG PM suspend\n");
#ifdef CONFIG_PM_RUNTIME
ret = pm_runtime_suspend(dev);
if (ret > 0)
ret = 0;
#else
ret = msm_otg_suspend(dev_get_drvdata(dev));
#endif
return ret;
}
static int msm_otg_pm_resume(struct device *dev)
{
struct msm_otg *motg = dev_get_drvdata(dev);
dev_dbg(dev, "OTG PM resume\n");
#ifdef CONFIG_PM_RUNTIME
/*
* Do not resume hardware as part of system resume,
* rather, wait for the ASYNC INT from the h/w
*/
return 0;
#endif
return msm_otg_resume(motg);
}
#endif
#ifdef CONFIG_PM
static const struct dev_pm_ops msm_otg_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(msm_otg_pm_suspend, msm_otg_pm_resume)
SET_RUNTIME_PM_OPS(msm_otg_runtime_suspend, msm_otg_runtime_resume,
msm_otg_runtime_idle)
};
#endif
static struct of_device_id msm_otg_dt_match[] = {
{ .compatible = "qcom,hsusb-otg",
},
{}
};
static struct platform_driver msm_otg_driver = {
.remove = __devexit_p(msm_otg_remove),
.driver = {
.name = DRIVER_NAME,
.owner = THIS_MODULE,
#ifdef CONFIG_PM
.pm = &msm_otg_dev_pm_ops,
#endif
.of_match_table = msm_otg_dt_match,
},
};
static int __init msm_otg_init(void)
{
return platform_driver_probe(&msm_otg_driver, msm_otg_probe);
}
static void __exit msm_otg_exit(void)
{
platform_driver_unregister(&msm_otg_driver);
}
module_init(msm_otg_init);
module_exit(msm_otg_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("MSM USB transceiver driver");