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linux/drivers/usb/dwc3/dwc3-omap.c
H. Nikolaus Schaller ac01df343e usb: dwc3: omap: fix "unbalanced disables for smps10_out1" on omap5evm 
Usually, the vbus_regulator (smps10 on omap5evm) boots up disabled.

Hence calling regulator_disable() indirectly through dwc3_omap_set_mailbox()
during probe leads to:

[   10.332764] WARNING: CPU: 0 PID: 1628 at drivers/regulator/core.c:2853 _regulator_disable+0x40/0x164
[   10.351919] unbalanced disables for smps10_out1
[   10.361298] Modules linked in: dwc3_omap(+) clk_twl6040 at24 gpio_twl6040 palmas_gpadc palmas_pwrbutton
industrialio snd_soc_omap_mcbsp(+) snd_soc_ti_sdma display_connector ti_tpd12s015 drm leds_gpio
drm_panel_orientation_quirks ip_tables x_tables ipv6 autofs4
[   10.387818] CPU: 0 PID: 1628 Comm: systemd-udevd Not tainted 5.17.0-rc1-letux-lpae+ #8139
[   10.405129] Hardware name: Generic OMAP5 (Flattened Device Tree)
[   10.411455]  unwind_backtrace from show_stack+0x10/0x14
[   10.416970]  show_stack from dump_stack_lvl+0x40/0x4c
[   10.422313]  dump_stack_lvl from __warn+0xb8/0x170
[   10.427377]  __warn from warn_slowpath_fmt+0x70/0x9c
[   10.432595]  warn_slowpath_fmt from _regulator_disable+0x40/0x164
[   10.439037]  _regulator_disable from regulator_disable+0x30/0x64
[   10.445382]  regulator_disable from dwc3_omap_set_mailbox+0x8c/0xf0 [dwc3_omap]
[   10.453116]  dwc3_omap_set_mailbox [dwc3_omap] from dwc3_omap_probe+0x2b8/0x394 [dwc3_omap]
[   10.467021]  dwc3_omap_probe [dwc3_omap] from platform_probe+0x58/0xa8
[   10.481762]  platform_probe from really_probe+0x168/0x2fc
[   10.481782]  really_probe from __driver_probe_device+0xc4/0xd8
[   10.481782]  __driver_probe_device from driver_probe_device+0x24/0xa4
[   10.503762]  driver_probe_device from __driver_attach+0xc4/0xd8
[   10.510018]  __driver_attach from bus_for_each_dev+0x64/0xa0
[   10.516001]  bus_for_each_dev from bus_add_driver+0x148/0x1a4
[   10.524880]  bus_add_driver from driver_register+0xb4/0xf8
[   10.530678]  driver_register from do_one_initcall+0x90/0x1c4
[   10.536661]  do_one_initcall from do_init_module+0x4c/0x200
[   10.536683]  do_init_module from load_module+0x13dc/0x1910
[   10.551159]  load_module from sys_finit_module+0xc8/0xd8
[   10.561319]  sys_finit_module from __sys_trace_return+0x0/0x18
[   10.561336] Exception stack(0xc344bfa8 to 0xc344bff0)
[   10.561341] bfa0:                   b6fb5778 b6fab8d8 00000007 b6ecfbb8 00000000 b6ed0398
[   10.561341] bfc0: b6fb5778 b6fab8d8 855c0500 0000017b 00020000 b6f9a3cc 00000000 b6fb5778
[   10.595500] bfe0: bede18f8 bede18e8 b6ec9aeb b6dda1c2
[   10.601345] ---[ end trace 0000000000000000 ]---

Fix this unnecessary warning by checking if the regulator is enabled.

Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Link: https://lore.kernel.org/r/af3b750dc2265d875deaabcf5f80098c9645da45.1646744616.git.hns@goldelico.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-03-15 15:44:46 +01:00

628 lines
16 KiB
C
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// SPDX-License-Identifier: GPL-2.0
/*
* dwc3-omap.c - OMAP Specific Glue layer
*
* Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
*
* Authors: Felipe Balbi <balbi@ti.com>,
* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/extcon.h>
#include <linux/regulator/consumer.h>
#include <linux/usb/otg.h>
/*
* All these registers belong to OMAP's Wrapper around the
* DesignWare USB3 Core.
*/
#define USBOTGSS_REVISION 0x0000
#define USBOTGSS_SYSCONFIG 0x0010
#define USBOTGSS_IRQ_EOI 0x0020
#define USBOTGSS_EOI_OFFSET 0x0008
#define USBOTGSS_IRQSTATUS_RAW_0 0x0024
#define USBOTGSS_IRQSTATUS_0 0x0028
#define USBOTGSS_IRQENABLE_SET_0 0x002c
#define USBOTGSS_IRQENABLE_CLR_0 0x0030
#define USBOTGSS_IRQ0_OFFSET 0x0004
#define USBOTGSS_IRQSTATUS_RAW_1 0x0030
#define USBOTGSS_IRQSTATUS_1 0x0034
#define USBOTGSS_IRQENABLE_SET_1 0x0038
#define USBOTGSS_IRQENABLE_CLR_1 0x003c
#define USBOTGSS_IRQSTATUS_RAW_2 0x0040
#define USBOTGSS_IRQSTATUS_2 0x0044
#define USBOTGSS_IRQENABLE_SET_2 0x0048
#define USBOTGSS_IRQENABLE_CLR_2 0x004c
#define USBOTGSS_IRQSTATUS_RAW_3 0x0050
#define USBOTGSS_IRQSTATUS_3 0x0054
#define USBOTGSS_IRQENABLE_SET_3 0x0058
#define USBOTGSS_IRQENABLE_CLR_3 0x005c
#define USBOTGSS_IRQSTATUS_EOI_MISC 0x0030
#define USBOTGSS_IRQSTATUS_RAW_MISC 0x0034
#define USBOTGSS_IRQSTATUS_MISC 0x0038
#define USBOTGSS_IRQENABLE_SET_MISC 0x003c
#define USBOTGSS_IRQENABLE_CLR_MISC 0x0040
#define USBOTGSS_IRQMISC_OFFSET 0x03fc
#define USBOTGSS_UTMI_OTG_STATUS 0x0080
#define USBOTGSS_UTMI_OTG_CTRL 0x0084
#define USBOTGSS_UTMI_OTG_OFFSET 0x0480
#define USBOTGSS_TXFIFO_DEPTH 0x0508
#define USBOTGSS_RXFIFO_DEPTH 0x050c
#define USBOTGSS_MMRAM_OFFSET 0x0100
#define USBOTGSS_FLADJ 0x0104
#define USBOTGSS_DEBUG_CFG 0x0108
#define USBOTGSS_DEBUG_DATA 0x010c
#define USBOTGSS_DEV_EBC_EN 0x0110
#define USBOTGSS_DEBUG_OFFSET 0x0600
/* SYSCONFIG REGISTER */
#define USBOTGSS_SYSCONFIG_DMADISABLE BIT(16)
/* IRQ_EOI REGISTER */
#define USBOTGSS_IRQ_EOI_LINE_NUMBER BIT(0)
/* IRQS0 BITS */
#define USBOTGSS_IRQO_COREIRQ_ST BIT(0)
/* IRQMISC BITS */
#define USBOTGSS_IRQMISC_DMADISABLECLR BIT(17)
#define USBOTGSS_IRQMISC_OEVT BIT(16)
#define USBOTGSS_IRQMISC_DRVVBUS_RISE BIT(13)
#define USBOTGSS_IRQMISC_CHRGVBUS_RISE BIT(12)
#define USBOTGSS_IRQMISC_DISCHRGVBUS_RISE BIT(11)
#define USBOTGSS_IRQMISC_IDPULLUP_RISE BIT(8)
#define USBOTGSS_IRQMISC_DRVVBUS_FALL BIT(5)
#define USBOTGSS_IRQMISC_CHRGVBUS_FALL BIT(4)
#define USBOTGSS_IRQMISC_DISCHRGVBUS_FALL BIT(3)
#define USBOTGSS_IRQMISC_IDPULLUP_FALL BIT(0)
/* UTMI_OTG_STATUS REGISTER */
#define USBOTGSS_UTMI_OTG_STATUS_DRVVBUS BIT(5)
#define USBOTGSS_UTMI_OTG_STATUS_CHRGVBUS BIT(4)
#define USBOTGSS_UTMI_OTG_STATUS_DISCHRGVBUS BIT(3)
#define USBOTGSS_UTMI_OTG_STATUS_IDPULLUP BIT(0)
/* UTMI_OTG_CTRL REGISTER */
#define USBOTGSS_UTMI_OTG_CTRL_SW_MODE BIT(31)
#define USBOTGSS_UTMI_OTG_CTRL_POWERPRESENT BIT(9)
#define USBOTGSS_UTMI_OTG_CTRL_TXBITSTUFFENABLE BIT(8)
#define USBOTGSS_UTMI_OTG_CTRL_IDDIG BIT(4)
#define USBOTGSS_UTMI_OTG_CTRL_SESSEND BIT(3)
#define USBOTGSS_UTMI_OTG_CTRL_SESSVALID BIT(2)
#define USBOTGSS_UTMI_OTG_CTRL_VBUSVALID BIT(1)
enum dwc3_omap_utmi_mode {
DWC3_OMAP_UTMI_MODE_UNKNOWN = 0,
DWC3_OMAP_UTMI_MODE_HW,
DWC3_OMAP_UTMI_MODE_SW,
};
struct dwc3_omap {
struct device *dev;
int irq;
void __iomem *base;
u32 utmi_otg_ctrl;
u32 utmi_otg_offset;
u32 irqmisc_offset;
u32 irq_eoi_offset;
u32 debug_offset;
u32 irq0_offset;
struct extcon_dev *edev;
struct notifier_block vbus_nb;
struct notifier_block id_nb;
struct regulator *vbus_reg;
};
enum omap_dwc3_vbus_id_status {
OMAP_DWC3_ID_FLOAT,
OMAP_DWC3_ID_GROUND,
OMAP_DWC3_VBUS_OFF,
OMAP_DWC3_VBUS_VALID,
};
static inline u32 dwc3_omap_readl(void __iomem *base, u32 offset)
{
return readl(base + offset);
}
static inline void dwc3_omap_writel(void __iomem *base, u32 offset, u32 value)
{
writel(value, base + offset);
}
static u32 dwc3_omap_read_utmi_ctrl(struct dwc3_omap *omap)
{
return dwc3_omap_readl(omap->base, USBOTGSS_UTMI_OTG_CTRL +
omap->utmi_otg_offset);
}
static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_UTMI_OTG_CTRL +
omap->utmi_otg_offset, value);
}
static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
{
return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
omap->irq0_offset);
}
static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_0 -
omap->irq0_offset, value);
}
static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
{
return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
omap->irqmisc_offset);
}
static void dwc3_omap_write_irqmisc_status(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQSTATUS_MISC +
omap->irqmisc_offset, value);
}
static void dwc3_omap_write_irqmisc_set(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_MISC +
omap->irqmisc_offset, value);
}
static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_SET_0 -
omap->irq0_offset, value);
}
static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
omap->irqmisc_offset, value);
}
static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
{
dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
omap->irq0_offset, value);
}
static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
enum omap_dwc3_vbus_id_status status)
{
int ret;
u32 val;
switch (status) {
case OMAP_DWC3_ID_GROUND:
if (omap->vbus_reg) {
ret = regulator_enable(omap->vbus_reg);
if (ret) {
dev_err(omap->dev, "regulator enable failed\n");
return;
}
}
val = dwc3_omap_read_utmi_ctrl(omap);
val &= ~USBOTGSS_UTMI_OTG_CTRL_IDDIG;
dwc3_omap_write_utmi_ctrl(omap, val);
break;
case OMAP_DWC3_VBUS_VALID:
val = dwc3_omap_read_utmi_ctrl(omap);
val &= ~USBOTGSS_UTMI_OTG_CTRL_SESSEND;
val |= USBOTGSS_UTMI_OTG_CTRL_VBUSVALID
| USBOTGSS_UTMI_OTG_CTRL_SESSVALID;
dwc3_omap_write_utmi_ctrl(omap, val);
break;
case OMAP_DWC3_ID_FLOAT:
if (omap->vbus_reg && regulator_is_enabled(omap->vbus_reg))
regulator_disable(omap->vbus_reg);
val = dwc3_omap_read_utmi_ctrl(omap);
val |= USBOTGSS_UTMI_OTG_CTRL_IDDIG;
dwc3_omap_write_utmi_ctrl(omap, val);
break;
case OMAP_DWC3_VBUS_OFF:
val = dwc3_omap_read_utmi_ctrl(omap);
val &= ~(USBOTGSS_UTMI_OTG_CTRL_SESSVALID
| USBOTGSS_UTMI_OTG_CTRL_VBUSVALID);
val |= USBOTGSS_UTMI_OTG_CTRL_SESSEND;
dwc3_omap_write_utmi_ctrl(omap, val);
break;
default:
dev_WARN(omap->dev, "invalid state\n");
}
}
static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);
static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
{
struct dwc3_omap *omap = _omap;
if (dwc3_omap_read_irqmisc_status(omap) ||
dwc3_omap_read_irq0_status(omap)) {
/* mask irqs */
dwc3_omap_disable_irqs(omap);
return IRQ_WAKE_THREAD;
}
return IRQ_NONE;
}
static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
{
struct dwc3_omap *omap = _omap;
u32 reg;
/* clear irq status flags */
reg = dwc3_omap_read_irqmisc_status(omap);
dwc3_omap_write_irqmisc_status(omap, reg);
reg = dwc3_omap_read_irq0_status(omap);
dwc3_omap_write_irq0_status(omap, reg);
/* unmask irqs */
dwc3_omap_enable_irqs(omap);
return IRQ_HANDLED;
}
static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
{
u32 reg;
/* enable all IRQs */
reg = USBOTGSS_IRQO_COREIRQ_ST;
dwc3_omap_write_irq0_set(omap, reg);
reg = (USBOTGSS_IRQMISC_OEVT |
USBOTGSS_IRQMISC_DRVVBUS_RISE |
USBOTGSS_IRQMISC_CHRGVBUS_RISE |
USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
USBOTGSS_IRQMISC_IDPULLUP_RISE |
USBOTGSS_IRQMISC_DRVVBUS_FALL |
USBOTGSS_IRQMISC_CHRGVBUS_FALL |
USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
USBOTGSS_IRQMISC_IDPULLUP_FALL);
dwc3_omap_write_irqmisc_set(omap, reg);
}
static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
{
u32 reg;
/* disable all IRQs */
reg = USBOTGSS_IRQO_COREIRQ_ST;
dwc3_omap_write_irq0_clr(omap, reg);
reg = (USBOTGSS_IRQMISC_OEVT |
USBOTGSS_IRQMISC_DRVVBUS_RISE |
USBOTGSS_IRQMISC_CHRGVBUS_RISE |
USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
USBOTGSS_IRQMISC_IDPULLUP_RISE |
USBOTGSS_IRQMISC_DRVVBUS_FALL |
USBOTGSS_IRQMISC_CHRGVBUS_FALL |
USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
USBOTGSS_IRQMISC_IDPULLUP_FALL);
dwc3_omap_write_irqmisc_clr(omap, reg);
}
static int dwc3_omap_id_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, id_nb);
if (event)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
return NOTIFY_DONE;
}
static int dwc3_omap_vbus_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct dwc3_omap *omap = container_of(nb, struct dwc3_omap, vbus_nb);
if (event)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
return NOTIFY_DONE;
}
static void dwc3_omap_map_offset(struct dwc3_omap *omap)
{
struct device_node *node = omap->dev->of_node;
/*
* Differentiate between OMAP5 and AM437x.
*
* For OMAP5(ES2.0) and AM437x wrapper revision is same, even
* though there are changes in wrapper register offsets.
*
* Using dt compatible to differentiate AM437x.
*/
if (of_device_is_compatible(node, "ti,am437x-dwc3")) {
omap->irq_eoi_offset = USBOTGSS_EOI_OFFSET;
omap->irq0_offset = USBOTGSS_IRQ0_OFFSET;
omap->irqmisc_offset = USBOTGSS_IRQMISC_OFFSET;
omap->utmi_otg_offset = USBOTGSS_UTMI_OTG_OFFSET;
omap->debug_offset = USBOTGSS_DEBUG_OFFSET;
}
}
static void dwc3_omap_set_utmi_mode(struct dwc3_omap *omap)
{
u32 reg;
struct device_node *node = omap->dev->of_node;
u32 utmi_mode = 0;
reg = dwc3_omap_read_utmi_ctrl(omap);
of_property_read_u32(node, "utmi-mode", &utmi_mode);
switch (utmi_mode) {
case DWC3_OMAP_UTMI_MODE_SW:
reg |= USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
break;
case DWC3_OMAP_UTMI_MODE_HW:
reg &= ~USBOTGSS_UTMI_OTG_CTRL_SW_MODE;
break;
default:
dev_WARN(omap->dev, "UNKNOWN utmi mode %d\n", utmi_mode);
}
dwc3_omap_write_utmi_ctrl(omap, reg);
}
static int dwc3_omap_extcon_register(struct dwc3_omap *omap)
{
int ret;
struct device_node *node = omap->dev->of_node;
struct extcon_dev *edev;
if (of_property_read_bool(node, "extcon")) {
edev = extcon_get_edev_by_phandle(omap->dev, 0);
if (IS_ERR(edev)) {
dev_vdbg(omap->dev, "couldn't get extcon device\n");
return -EPROBE_DEFER;
}
omap->vbus_nb.notifier_call = dwc3_omap_vbus_notifier;
ret = devm_extcon_register_notifier(omap->dev, edev,
EXTCON_USB, &omap->vbus_nb);
if (ret < 0)
dev_vdbg(omap->dev, "failed to register notifier for USB\n");
omap->id_nb.notifier_call = dwc3_omap_id_notifier;
ret = devm_extcon_register_notifier(omap->dev, edev,
EXTCON_USB_HOST, &omap->id_nb);
if (ret < 0)
dev_vdbg(omap->dev, "failed to register notifier for USB-HOST\n");
if (extcon_get_state(edev, EXTCON_USB) == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
if (extcon_get_state(edev, EXTCON_USB_HOST) == true)
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
omap->edev = edev;
}
return 0;
}
static int dwc3_omap_probe(struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct dwc3_omap *omap;
struct device *dev = &pdev->dev;
struct regulator *vbus_reg = NULL;
int ret;
int irq;
void __iomem *base;
if (!node) {
dev_err(dev, "device node not found\n");
return -EINVAL;
}
omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
if (!omap)
return -ENOMEM;
platform_set_drvdata(pdev, omap);
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);
if (of_property_read_bool(node, "vbus-supply")) {
vbus_reg = devm_regulator_get(dev, "vbus");
if (IS_ERR(vbus_reg)) {
dev_err(dev, "vbus init failed\n");
return PTR_ERR(vbus_reg);
}
}
omap->dev = dev;
omap->irq = irq;
omap->base = base;
omap->vbus_reg = vbus_reg;
pm_runtime_enable(dev);
ret = pm_runtime_get_sync(dev);
if (ret < 0) {
dev_err(dev, "get_sync failed with err %d\n", ret);
goto err1;
}
dwc3_omap_map_offset(omap);
dwc3_omap_set_utmi_mode(omap);
ret = dwc3_omap_extcon_register(omap);
if (ret < 0)
goto err1;
ret = of_platform_populate(node, NULL, NULL, dev);
if (ret) {
dev_err(&pdev->dev, "failed to create dwc3 core\n");
goto err1;
}
ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
dwc3_omap_interrupt_thread, IRQF_SHARED,
"dwc3-omap", omap);
if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret);
goto err1;
}
dwc3_omap_enable_irqs(omap);
return 0;
err1:
pm_runtime_put_sync(dev);
pm_runtime_disable(dev);
return ret;
}
static int dwc3_omap_remove(struct platform_device *pdev)
{
struct dwc3_omap *omap = platform_get_drvdata(pdev);
dwc3_omap_disable_irqs(omap);
disable_irq(omap->irq);
of_platform_depopulate(omap->dev);
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
return 0;
}
static const struct of_device_id of_dwc3_match[] = {
{
.compatible = "ti,dwc3"
},
{
.compatible = "ti,am437x-dwc3"
},
{ },
};
MODULE_DEVICE_TABLE(of, of_dwc3_match);
#ifdef CONFIG_PM_SLEEP
static int dwc3_omap_suspend(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
omap->utmi_otg_ctrl = dwc3_omap_read_utmi_ctrl(omap);
dwc3_omap_disable_irqs(omap);
return 0;
}
static int dwc3_omap_resume(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
dwc3_omap_write_utmi_ctrl(omap, omap->utmi_otg_ctrl);
dwc3_omap_enable_irqs(omap);
pm_runtime_disable(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
return 0;
}
static void dwc3_omap_complete(struct device *dev)
{
struct dwc3_omap *omap = dev_get_drvdata(dev);
if (extcon_get_state(omap->edev, EXTCON_USB))
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_VALID);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_VBUS_OFF);
if (extcon_get_state(omap->edev, EXTCON_USB_HOST))
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_GROUND);
else
dwc3_omap_set_mailbox(omap, OMAP_DWC3_ID_FLOAT);
}
static const struct dev_pm_ops dwc3_omap_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(dwc3_omap_suspend, dwc3_omap_resume)
.complete = dwc3_omap_complete,
};
#define DEV_PM_OPS (&dwc3_omap_dev_pm_ops)
#else
#define DEV_PM_OPS NULL
#endif /* CONFIG_PM_SLEEP */
static struct platform_driver dwc3_omap_driver = {
.probe = dwc3_omap_probe,
.remove = dwc3_omap_remove,
.driver = {
.name = "omap-dwc3",
.of_match_table = of_dwc3_match,
.pm = DEV_PM_OPS,
},
};
module_platform_driver(dwc3_omap_driver);
MODULE_ALIAS("platform:omap-dwc3");
MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare USB3 OMAP Glue Layer");
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