tresor.bessoh
/
linuxdebug
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linuxdebug/drivers/usb/dwc3/dwc3-qcom.c

1082 lines
26 KiB
C
Raw Permalink Blame History

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*
* Inspired by dwc3-of-simple.c
*/
#include <linux/acpi.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/clk.h>
#include <linux/irq.h>
#include <linux/of_clk.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/extcon.h>
#include <linux/interconnect.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/phy/phy.h>
#include <linux/usb/of.h>
#include <linux/reset.h>
#include <linux/iopoll.h>
#include <linux/usb/hcd.h>
#include <linux/usb.h>
#include "core.h"
/* USB QSCRATCH Hardware registers */
#define QSCRATCH_HS_PHY_CTRL 0x10
#define UTMI_OTG_VBUS_VALID BIT(20)
#define SW_SESSVLD_SEL BIT(28)
#define QSCRATCH_SS_PHY_CTRL 0x30
#define LANE0_PWR_PRESENT BIT(24)
#define QSCRATCH_GENERAL_CFG 0x08
#define PIPE_UTMI_CLK_SEL BIT(0)
#define PIPE3_PHYSTATUS_SW BIT(3)
#define PIPE_UTMI_CLK_DIS BIT(8)
#define PWR_EVNT_IRQ_STAT_REG 0x58
#define PWR_EVNT_LPM_IN_L2_MASK BIT(4)
#define PWR_EVNT_LPM_OUT_L2_MASK BIT(5)
#define SDM845_QSCRATCH_BASE_OFFSET 0xf8800
#define SDM845_QSCRATCH_SIZE 0x400
#define SDM845_DWC3_CORE_SIZE 0xcd00
/* Interconnect path bandwidths in MBps */
#define USB_MEMORY_AVG_HS_BW MBps_to_icc(240)
#define USB_MEMORY_PEAK_HS_BW MBps_to_icc(700)
#define USB_MEMORY_AVG_SS_BW MBps_to_icc(1000)
#define USB_MEMORY_PEAK_SS_BW MBps_to_icc(2500)
#define APPS_USB_AVG_BW 0
#define APPS_USB_PEAK_BW MBps_to_icc(40)
struct dwc3_acpi_pdata {
u32 qscratch_base_offset;
u32 qscratch_base_size;
u32 dwc3_core_base_size;
int hs_phy_irq_index;
int dp_hs_phy_irq_index;
int dm_hs_phy_irq_index;
int ss_phy_irq_index;
bool is_urs;
};
struct dwc3_qcom {
struct device *dev;
void __iomem *qscratch_base;
struct platform_device *dwc3;
struct platform_device *urs_usb;
struct clk **clks;
int num_clocks;
struct reset_control *resets;
int hs_phy_irq;
int dp_hs_phy_irq;
int dm_hs_phy_irq;
int ss_phy_irq;
enum usb_device_speed usb2_speed;
struct extcon_dev *edev;
struct extcon_dev *host_edev;
struct notifier_block vbus_nb;
struct notifier_block host_nb;
const struct dwc3_acpi_pdata *acpi_pdata;
enum usb_dr_mode mode;
bool is_suspended;
bool pm_suspended;
struct icc_path *icc_path_ddr;
struct icc_path *icc_path_apps;
};
static inline void dwc3_qcom_setbits(void __iomem *base, u32 offset, u32 val)
{
u32 reg;
reg = readl(base + offset);
reg |= val;
writel(reg, base + offset);
/* ensure that above write is through */
readl(base + offset);
}
static inline void dwc3_qcom_clrbits(void __iomem *base, u32 offset, u32 val)
{
u32 reg;
reg = readl(base + offset);
reg &= ~val;
writel(reg, base + offset);
/* ensure that above write is through */
readl(base + offset);
}
static void dwc3_qcom_vbus_override_enable(struct dwc3_qcom *qcom, bool enable)
{
if (enable) {
dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
LANE0_PWR_PRESENT);
dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
} else {
dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_SS_PHY_CTRL,
LANE0_PWR_PRESENT);
dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_HS_PHY_CTRL,
UTMI_OTG_VBUS_VALID | SW_SESSVLD_SEL);
}
}
static int dwc3_qcom_vbus_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, vbus_nb);
/* enable vbus override for device mode */
dwc3_qcom_vbus_override_enable(qcom, event);
qcom->mode = event ? USB_DR_MODE_PERIPHERAL : USB_DR_MODE_HOST;
return NOTIFY_DONE;
}
static int dwc3_qcom_host_notifier(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct dwc3_qcom *qcom = container_of(nb, struct dwc3_qcom, host_nb);
/* disable vbus override in host mode */
dwc3_qcom_vbus_override_enable(qcom, !event);
qcom->mode = event ? USB_DR_MODE_HOST : USB_DR_MODE_PERIPHERAL;
return NOTIFY_DONE;
}
static int dwc3_qcom_register_extcon(struct dwc3_qcom *qcom)
{
struct device *dev = qcom->dev;
struct extcon_dev *host_edev;
int ret;
if (!of_property_read_bool(dev->of_node, "extcon"))
return 0;
qcom->edev = extcon_get_edev_by_phandle(dev, 0);
if (IS_ERR(qcom->edev))
return PTR_ERR(qcom->edev);
qcom->vbus_nb.notifier_call = dwc3_qcom_vbus_notifier;
qcom->host_edev = extcon_get_edev_by_phandle(dev, 1);
if (IS_ERR(qcom->host_edev))
qcom->host_edev = NULL;
ret = devm_extcon_register_notifier(dev, qcom->edev, EXTCON_USB,
&qcom->vbus_nb);
if (ret < 0) {
dev_err(dev, "VBUS notifier register failed\n");
return ret;
}
if (qcom->host_edev)
host_edev = qcom->host_edev;
else
host_edev = qcom->edev;
qcom->host_nb.notifier_call = dwc3_qcom_host_notifier;
ret = devm_extcon_register_notifier(dev, host_edev, EXTCON_USB_HOST,
&qcom->host_nb);
if (ret < 0) {
dev_err(dev, "Host notifier register failed\n");
return ret;
}
/* Update initial VBUS override based on extcon state */
if (extcon_get_state(qcom->edev, EXTCON_USB) ||
!extcon_get_state(host_edev, EXTCON_USB_HOST))
dwc3_qcom_vbus_notifier(&qcom->vbus_nb, true, qcom->edev);
else
dwc3_qcom_vbus_notifier(&qcom->vbus_nb, false, qcom->edev);
return 0;
}
static int dwc3_qcom_interconnect_enable(struct dwc3_qcom *qcom)
{
int ret;
ret = icc_enable(qcom->icc_path_ddr);
if (ret)
return ret;
ret = icc_enable(qcom->icc_path_apps);
if (ret)
icc_disable(qcom->icc_path_ddr);
return ret;
}
static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom)
{
int ret;
ret = icc_disable(qcom->icc_path_ddr);
if (ret)
return ret;
ret = icc_disable(qcom->icc_path_apps);
if (ret)
icc_enable(qcom->icc_path_ddr);
return ret;
}
/**
* dwc3_qcom_interconnect_init() - Get interconnect path handles
* and set bandwidth.
* @qcom: Pointer to the concerned usb core.
*
*/
static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
{
enum usb_device_speed max_speed;
struct device *dev = qcom->dev;
int ret;
if (has_acpi_companion(dev))
return 0;
qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
if (IS_ERR(qcom->icc_path_ddr)) {
dev_err(dev, "failed to get usb-ddr path: %ld\n",
PTR_ERR(qcom->icc_path_ddr));
return PTR_ERR(qcom->icc_path_ddr);
}
qcom->icc_path_apps = of_icc_get(dev, "apps-usb");
if (IS_ERR(qcom->icc_path_apps)) {
dev_err(dev, "failed to get apps-usb path: %ld\n",
PTR_ERR(qcom->icc_path_apps));
ret = PTR_ERR(qcom->icc_path_apps);
goto put_path_ddr;
}
max_speed = usb_get_maximum_speed(&qcom->dwc3->dev);
if (max_speed >= USB_SPEED_SUPER || max_speed == USB_SPEED_UNKNOWN) {
ret = icc_set_bw(qcom->icc_path_ddr,
USB_MEMORY_AVG_SS_BW, USB_MEMORY_PEAK_SS_BW);
} else {
ret = icc_set_bw(qcom->icc_path_ddr,
USB_MEMORY_AVG_HS_BW, USB_MEMORY_PEAK_HS_BW);
}
if (ret) {
dev_err(dev, "failed to set bandwidth for usb-ddr path: %d\n", ret);
goto put_path_apps;
}
ret = icc_set_bw(qcom->icc_path_apps, APPS_USB_AVG_BW, APPS_USB_PEAK_BW);
if (ret) {
dev_err(dev, "failed to set bandwidth for apps-usb path: %d\n", ret);
goto put_path_apps;
}
return 0;
put_path_apps:
icc_put(qcom->icc_path_apps);
put_path_ddr:
icc_put(qcom->icc_path_ddr);
return ret;
}
/**
* dwc3_qcom_interconnect_exit() - Release interconnect path handles
* @qcom: Pointer to the concerned usb core.
*
* This function is used to release interconnect path handle.
*/
static void dwc3_qcom_interconnect_exit(struct dwc3_qcom *qcom)
{
icc_put(qcom->icc_path_ddr);
icc_put(qcom->icc_path_apps);
}
/* Only usable in contexts where the role can not change. */
static bool dwc3_qcom_is_host(struct dwc3_qcom *qcom)
{
struct dwc3 *dwc;
/*
* FIXME: Fix this layering violation.
*/
dwc = platform_get_drvdata(qcom->dwc3);
/* Core driver may not have probed yet. */
if (!dwc)
return false;
return dwc->xhci;
}
static enum usb_device_speed dwc3_qcom_read_usb2_speed(struct dwc3_qcom *qcom)
{
struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
struct usb_device *udev;
struct usb_hcd __maybe_unused *hcd;
/*
* FIXME: Fix this layering violation.
*/
hcd = platform_get_drvdata(dwc->xhci);
/*
* It is possible to query the speed of all children of
* USB2.0 root hub via usb_hub_for_each_child(). DWC3 code
* currently supports only 1 port per controller. So
* this is sufficient.
*/
#ifdef CONFIG_USB
udev = usb_hub_find_child(hcd->self.root_hub, 1);
#else
udev = NULL;
#endif
if (!udev)
return USB_SPEED_UNKNOWN;
return udev->speed;
}
static void dwc3_qcom_enable_wakeup_irq(int irq, unsigned int polarity)
{
if (!irq)
return;
if (polarity)
irq_set_irq_type(irq, polarity);
enable_irq(irq);
enable_irq_wake(irq);
}
static void dwc3_qcom_disable_wakeup_irq(int irq)
{
if (!irq)
return;
disable_irq_wake(irq);
disable_irq_nosync(irq);
}
static void dwc3_qcom_disable_interrupts(struct dwc3_qcom *qcom)
{
dwc3_qcom_disable_wakeup_irq(qcom->hs_phy_irq);
if (qcom->usb2_speed == USB_SPEED_LOW) {
dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
(qcom->usb2_speed == USB_SPEED_FULL)) {
dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
} else {
dwc3_qcom_disable_wakeup_irq(qcom->dp_hs_phy_irq);
dwc3_qcom_disable_wakeup_irq(qcom->dm_hs_phy_irq);
}
dwc3_qcom_disable_wakeup_irq(qcom->ss_phy_irq);
}
static void dwc3_qcom_enable_interrupts(struct dwc3_qcom *qcom)
{
dwc3_qcom_enable_wakeup_irq(qcom->hs_phy_irq, 0);
/*
* Configure DP/DM line interrupts based on the USB2 device attached to
* the root hub port. When HS/FS device is connected, configure the DP line
* as falling edge to detect both disconnect and remote wakeup scenarios. When
* LS device is connected, configure DM line as falling edge to detect both
* disconnect and remote wakeup. When no device is connected, configure both
* DP and DM lines as rising edge to detect HS/HS/LS device connect scenario.
*/
if (qcom->usb2_speed == USB_SPEED_LOW) {
dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
IRQ_TYPE_EDGE_FALLING);
} else if ((qcom->usb2_speed == USB_SPEED_HIGH) ||
(qcom->usb2_speed == USB_SPEED_FULL)) {
dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
IRQ_TYPE_EDGE_FALLING);
} else {
dwc3_qcom_enable_wakeup_irq(qcom->dp_hs_phy_irq,
IRQ_TYPE_EDGE_RISING);
dwc3_qcom_enable_wakeup_irq(qcom->dm_hs_phy_irq,
IRQ_TYPE_EDGE_RISING);
}
dwc3_qcom_enable_wakeup_irq(qcom->ss_phy_irq, 0);
}
static int dwc3_qcom_suspend(struct dwc3_qcom *qcom, bool wakeup)
{
u32 val;
int i, ret;
if (qcom->is_suspended)
return 0;
val = readl(qcom->qscratch_base + PWR_EVNT_IRQ_STAT_REG);
if (!(val & PWR_EVNT_LPM_IN_L2_MASK))
dev_err(qcom->dev, "HS-PHY not in L2\n");
for (i = qcom->num_clocks - 1; i >= 0; i--)
clk_disable_unprepare(qcom->clks[i]);
ret = dwc3_qcom_interconnect_disable(qcom);
if (ret)
dev_warn(qcom->dev, "failed to disable interconnect: %d\n", ret);
/*
* The role is stable during suspend as role switching is done from a
* freezable workqueue.
*/
if (dwc3_qcom_is_host(qcom) && wakeup) {
qcom->usb2_speed = dwc3_qcom_read_usb2_speed(qcom);
dwc3_qcom_enable_interrupts(qcom);
}
qcom->is_suspended = true;
return 0;
}
static int dwc3_qcom_resume(struct dwc3_qcom *qcom, bool wakeup)
{
int ret;
int i;
if (!qcom->is_suspended)
return 0;
if (dwc3_qcom_is_host(qcom) && wakeup)
dwc3_qcom_disable_interrupts(qcom);
for (i = 0; i < qcom->num_clocks; i++) {
ret = clk_prepare_enable(qcom->clks[i]);
if (ret < 0) {
while (--i >= 0)
clk_disable_unprepare(qcom->clks[i]);
return ret;
}
}
ret = dwc3_qcom_interconnect_enable(qcom);
if (ret)
dev_warn(qcom->dev, "failed to enable interconnect: %d\n", ret);
/* Clear existing events from PHY related to L2 in/out */
dwc3_qcom_setbits(qcom->qscratch_base, PWR_EVNT_IRQ_STAT_REG,
PWR_EVNT_LPM_IN_L2_MASK | PWR_EVNT_LPM_OUT_L2_MASK);
qcom->is_suspended = false;
return 0;
}
static irqreturn_t qcom_dwc3_resume_irq(int irq, void *data)
{
struct dwc3_qcom *qcom = data;
struct dwc3 *dwc = platform_get_drvdata(qcom->dwc3);
/* If pm_suspended then let pm_resume take care of resuming h/w */
if (qcom->pm_suspended)
return IRQ_HANDLED;
/*
* This is safe as role switching is done from a freezable workqueue
* and the wakeup interrupts are disabled as part of resume.
*/
if (dwc3_qcom_is_host(qcom))
pm_runtime_resume(&dwc->xhci->dev);
return IRQ_HANDLED;
}
static void dwc3_qcom_select_utmi_clk(struct dwc3_qcom *qcom)
{
/* Configure dwc3 to use UTMI clock as PIPE clock not present */
dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
PIPE_UTMI_CLK_DIS);
usleep_range(100, 1000);
dwc3_qcom_setbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
PIPE_UTMI_CLK_SEL | PIPE3_PHYSTATUS_SW);
usleep_range(100, 1000);
dwc3_qcom_clrbits(qcom->qscratch_base, QSCRATCH_GENERAL_CFG,
PIPE_UTMI_CLK_DIS);
}
static int dwc3_qcom_get_irq(struct platform_device *pdev,
const char *name, int num)
{
struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb : pdev;
struct device_node *np = pdev->dev.of_node;
int ret;
if (np)
ret = platform_get_irq_byname_optional(pdev_irq, name);
else
ret = platform_get_irq_optional(pdev_irq, num);
return ret;
}
static int dwc3_qcom_setup_irq(struct platform_device *pdev)
{
struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
const struct dwc3_acpi_pdata *pdata = qcom->acpi_pdata;
int irq;
int ret;
irq = dwc3_qcom_get_irq(pdev, "hs_phy_irq",
pdata ? pdata->hs_phy_irq_index : -1);
if (irq > 0) {
/* Keep wakeup interrupts disabled until suspend */
irq_set_status_flags(irq, IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
qcom_dwc3_resume_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"qcom_dwc3 HS", qcom);
if (ret) {
dev_err(qcom->dev, "hs_phy_irq failed: %d\n", ret);
return ret;
}
qcom->hs_phy_irq = irq;
}
irq = dwc3_qcom_get_irq(pdev, "dp_hs_phy_irq",
pdata ? pdata->dp_hs_phy_irq_index : -1);
if (irq > 0) {
irq_set_status_flags(irq, IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
qcom_dwc3_resume_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"qcom_dwc3 DP_HS", qcom);
if (ret) {
dev_err(qcom->dev, "dp_hs_phy_irq failed: %d\n", ret);
return ret;
}
qcom->dp_hs_phy_irq = irq;
}
irq = dwc3_qcom_get_irq(pdev, "dm_hs_phy_irq",
pdata ? pdata->dm_hs_phy_irq_index : -1);
if (irq > 0) {
irq_set_status_flags(irq, IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
qcom_dwc3_resume_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"qcom_dwc3 DM_HS", qcom);
if (ret) {
dev_err(qcom->dev, "dm_hs_phy_irq failed: %d\n", ret);
return ret;
}
qcom->dm_hs_phy_irq = irq;
}
irq = dwc3_qcom_get_irq(pdev, "ss_phy_irq",
pdata ? pdata->ss_phy_irq_index : -1);
if (irq > 0) {
irq_set_status_flags(irq, IRQ_NOAUTOEN);
ret = devm_request_threaded_irq(qcom->dev, irq, NULL,
qcom_dwc3_resume_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"qcom_dwc3 SS", qcom);
if (ret) {
dev_err(qcom->dev, "ss_phy_irq failed: %d\n", ret);
return ret;
}
qcom->ss_phy_irq = irq;
}
return 0;
}
static int dwc3_qcom_clk_init(struct dwc3_qcom *qcom, int count)
{
struct device *dev = qcom->dev;
struct device_node *np = dev->of_node;
int i;
if (!np || !count)
return 0;
if (count < 0)
return count;
qcom->num_clocks = count;
qcom->clks = devm_kcalloc(dev, qcom->num_clocks,
sizeof(struct clk *), GFP_KERNEL);
if (!qcom->clks)
return -ENOMEM;
for (i = 0; i < qcom->num_clocks; i++) {
struct clk *clk;
int ret;
clk = of_clk_get(np, i);
if (IS_ERR(clk)) {
while (--i >= 0)
clk_put(qcom->clks[i]);
return PTR_ERR(clk);
}
ret = clk_prepare_enable(clk);
if (ret < 0) {
while (--i >= 0) {
clk_disable_unprepare(qcom->clks[i]);
clk_put(qcom->clks[i]);
}
clk_put(clk);
return ret;
}
qcom->clks[i] = clk;
}
return 0;
}
static const struct property_entry dwc3_qcom_acpi_properties[] = {
PROPERTY_ENTRY_STRING("dr_mode", "host"),
{}
};
static const struct software_node dwc3_qcom_swnode = {
.properties = dwc3_qcom_acpi_properties,
};
static int dwc3_qcom_acpi_register_core(struct platform_device *pdev)
{
struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
struct device *dev = &pdev->dev;
struct resource *res, *child_res = NULL;
struct platform_device *pdev_irq = qcom->urs_usb ? qcom->urs_usb :
pdev;
int irq;
int ret;
qcom->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
if (!qcom->dwc3)
return -ENOMEM;
qcom->dwc3->dev.parent = dev;
qcom->dwc3->dev.type = dev->type;
qcom->dwc3->dev.dma_mask = dev->dma_mask;
qcom->dwc3->dev.dma_parms = dev->dma_parms;
qcom->dwc3->dev.coherent_dma_mask = dev->coherent_dma_mask;
child_res = kcalloc(2, sizeof(*child_res), GFP_KERNEL);
if (!child_res) {
platform_device_put(qcom->dwc3);
return -ENOMEM;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get memory resource\n");
ret = -ENODEV;
goto out;
}
child_res[0].flags = res->flags;
child_res[0].start = res->start;
child_res[0].end = child_res[0].start +
qcom->acpi_pdata->dwc3_core_base_size;
irq = platform_get_irq(pdev_irq, 0);
if (irq < 0) {
ret = irq;
goto out;
}
child_res[1].flags = IORESOURCE_IRQ;
child_res[1].start = child_res[1].end = irq;
ret = platform_device_add_resources(qcom->dwc3, child_res, 2);
if (ret) {
dev_err(&pdev->dev, "failed to add resources\n");
goto out;
}
ret = device_add_software_node(&qcom->dwc3->dev, &dwc3_qcom_swnode);
if (ret < 0) {
dev_err(&pdev->dev, "failed to add properties\n");
goto out;
}
ret = platform_device_add(qcom->dwc3);
if (ret) {
dev_err(&pdev->dev, "failed to add device\n");
device_remove_software_node(&qcom->dwc3->dev);
goto out;
}
kfree(child_res);
return 0;
out:
platform_device_put(qcom->dwc3);
kfree(child_res);
return ret;
}
static int dwc3_qcom_of_register_core(struct platform_device *pdev)
{
struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
struct device_node *np = pdev->dev.of_node, *dwc3_np;
struct device *dev = &pdev->dev;
int ret;
dwc3_np = of_get_compatible_child(np, "snps,dwc3");
if (!dwc3_np) {
dev_err(dev, "failed to find dwc3 core child\n");
return -ENODEV;
}
ret = of_platform_populate(np, NULL, NULL, dev);
if (ret) {
dev_err(dev, "failed to register dwc3 core - %d\n", ret);
goto node_put;
}
qcom->dwc3 = of_find_device_by_node(dwc3_np);
if (!qcom->dwc3) {
ret = -ENODEV;
dev_err(dev, "failed to get dwc3 platform device\n");
}
node_put:
of_node_put(dwc3_np);
return ret;
}
static struct platform_device *
dwc3_qcom_create_urs_usb_platdev(struct device *dev)
{
struct fwnode_handle *fwh;
struct acpi_device *adev;
char name[8];
int ret;
int id;
/* Figure out device id */
ret = sscanf(fwnode_get_name(dev->fwnode), "URS%d", &id);
if (!ret)
return NULL;
/* Find the child using name */
snprintf(name, sizeof(name), "USB%d", id);
fwh = fwnode_get_named_child_node(dev->fwnode, name);
if (!fwh)
return NULL;
adev = to_acpi_device_node(fwh);
if (!adev)
return NULL;
return acpi_create_platform_device(adev, NULL);
}
static int dwc3_qcom_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct dwc3_qcom *qcom;
struct resource *res, *parent_res = NULL;
struct resource local_res;
int ret, i;
bool ignore_pipe_clk;
bool wakeup_source;
qcom = devm_kzalloc(&pdev->dev, sizeof(*qcom), GFP_KERNEL);
if (!qcom)
return -ENOMEM;
platform_set_drvdata(pdev, qcom);
qcom->dev = &pdev->dev;
if (has_acpi_companion(dev)) {
qcom->acpi_pdata = acpi_device_get_match_data(dev);
if (!qcom->acpi_pdata) {
dev_err(&pdev->dev, "no supporting ACPI device data\n");
return -EINVAL;
}
}
qcom->resets = devm_reset_control_array_get_optional_exclusive(dev);
if (IS_ERR(qcom->resets)) {
ret = PTR_ERR(qcom->resets);
dev_err(&pdev->dev, "failed to get resets, err=%d\n", ret);
return ret;
}
ret = reset_control_assert(qcom->resets);
if (ret) {
dev_err(&pdev->dev, "failed to assert resets, err=%d\n", ret);
return ret;
}
usleep_range(10, 1000);
ret = reset_control_deassert(qcom->resets);
if (ret) {
dev_err(&pdev->dev, "failed to deassert resets, err=%d\n", ret);
goto reset_assert;
}
ret = dwc3_qcom_clk_init(qcom, of_clk_get_parent_count(np));
if (ret) {
dev_err(dev, "failed to get clocks\n");
goto reset_assert;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (np) {
parent_res = res;
} else {
memcpy(&local_res, res, sizeof(struct resource));
parent_res = &local_res;
parent_res->start = res->start +
qcom->acpi_pdata->qscratch_base_offset;
parent_res->end = parent_res->start +
qcom->acpi_pdata->qscratch_base_size;
if (qcom->acpi_pdata->is_urs) {
qcom->urs_usb = dwc3_qcom_create_urs_usb_platdev(dev);
if (IS_ERR_OR_NULL(qcom->urs_usb)) {
dev_err(dev, "failed to create URS USB platdev\n");
if (!qcom->urs_usb)
ret = -ENODEV;
else
ret = PTR_ERR(qcom->urs_usb);
goto clk_disable;
}
}
}
qcom->qscratch_base = devm_ioremap_resource(dev, parent_res);
if (IS_ERR(qcom->qscratch_base)) {
ret = PTR_ERR(qcom->qscratch_base);
goto clk_disable;
}
ret = dwc3_qcom_setup_irq(pdev);
if (ret) {
dev_err(dev, "failed to setup IRQs, err=%d\n", ret);
goto clk_disable;
}
/*
* Disable pipe_clk requirement if specified. Used when dwc3
* operates without SSPHY and only HS/FS/LS modes are supported.
*/
ignore_pipe_clk = device_property_read_bool(dev,
"qcom,select-utmi-as-pipe-clk");
if (ignore_pipe_clk)
dwc3_qcom_select_utmi_clk(qcom);
if (np)
ret = dwc3_qcom_of_register_core(pdev);
else
ret = dwc3_qcom_acpi_register_core(pdev);
if (ret) {
dev_err(dev, "failed to register DWC3 Core, err=%d\n", ret);
goto depopulate;
}
ret = dwc3_qcom_interconnect_init(qcom);
if (ret)
goto depopulate;
qcom->mode = usb_get_dr_mode(&qcom->dwc3->dev);
/* enable vbus override for device mode */
if (qcom->mode != USB_DR_MODE_HOST)
dwc3_qcom_vbus_override_enable(qcom, true);
/* register extcon to override sw_vbus on Vbus change later */
ret = dwc3_qcom_register_extcon(qcom);
if (ret)
goto interconnect_exit;
wakeup_source = of_property_read_bool(dev->of_node, "wakeup-source");
device_init_wakeup(&pdev->dev, wakeup_source);
device_init_wakeup(&qcom->dwc3->dev, wakeup_source);
qcom->is_suspended = false;
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
pm_runtime_forbid(dev);
return 0;
interconnect_exit:
dwc3_qcom_interconnect_exit(qcom);
depopulate:
if (np)
of_platform_depopulate(&pdev->dev);
else
platform_device_put(pdev);
clk_disable:
for (i = qcom->num_clocks - 1; i >= 0; i--) {
clk_disable_unprepare(qcom->clks[i]);
clk_put(qcom->clks[i]);
}
reset_assert:
reset_control_assert(qcom->resets);
return ret;
}
static int dwc3_qcom_remove(struct platform_device *pdev)
{
struct dwc3_qcom *qcom = platform_get_drvdata(pdev);
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
int i;
device_remove_software_node(&qcom->dwc3->dev);
if (np)
of_platform_depopulate(&pdev->dev);
else
platform_device_put(pdev);
for (i = qcom->num_clocks - 1; i >= 0; i--) {
clk_disable_unprepare(qcom->clks[i]);
clk_put(qcom->clks[i]);
}
qcom->num_clocks = 0;
dwc3_qcom_interconnect_exit(qcom);
reset_control_assert(qcom->resets);
pm_runtime_allow(dev);
pm_runtime_disable(dev);
return 0;
}
static int __maybe_unused dwc3_qcom_pm_suspend(struct device *dev)
{
struct dwc3_qcom *qcom = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int ret;
ret = dwc3_qcom_suspend(qcom, wakeup);
if (ret)
return ret;
qcom->pm_suspended = true;
return 0;
}
static int __maybe_unused dwc3_qcom_pm_resume(struct device *dev)
{
struct dwc3_qcom *qcom = dev_get_drvdata(dev);
bool wakeup = device_may_wakeup(dev);
int ret;
ret = dwc3_qcom_resume(qcom, wakeup);
if (ret)
return ret;
qcom->pm_suspended = false;
return 0;
}
static int __maybe_unused dwc3_qcom_runtime_suspend(struct device *dev)
{
struct dwc3_qcom *qcom = dev_get_drvdata(dev);
return dwc3_qcom_suspend(qcom, true);
}
static int __maybe_unused dwc3_qcom_runtime_resume(struct device *dev)
{
struct dwc3_qcom *qcom = dev_get_drvdata(dev);
return dwc3_qcom_resume(qcom, true);
}
static const struct dev_pm_ops dwc3_qcom_dev_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(dwc3_qcom_pm_suspend, dwc3_qcom_pm_resume)
SET_RUNTIME_PM_OPS(dwc3_qcom_runtime_suspend, dwc3_qcom_runtime_resume,
NULL)
};
static const struct of_device_id dwc3_qcom_of_match[] = {
{ .compatible = "qcom,dwc3" },
{ }
};
MODULE_DEVICE_TABLE(of, dwc3_qcom_of_match);
#ifdef CONFIG_ACPI
static const struct dwc3_acpi_pdata sdm845_acpi_pdata = {
.qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
.qscratch_base_size = SDM845_QSCRATCH_SIZE,
.dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
.hs_phy_irq_index = 1,
.dp_hs_phy_irq_index = 4,
.dm_hs_phy_irq_index = 3,
.ss_phy_irq_index = 2
};
static const struct dwc3_acpi_pdata sdm845_acpi_urs_pdata = {
.qscratch_base_offset = SDM845_QSCRATCH_BASE_OFFSET,
.qscratch_base_size = SDM845_QSCRATCH_SIZE,
.dwc3_core_base_size = SDM845_DWC3_CORE_SIZE,
.hs_phy_irq_index = 1,
.dp_hs_phy_irq_index = 4,
.dm_hs_phy_irq_index = 3,
.ss_phy_irq_index = 2,
.is_urs = true,
};
static const struct acpi_device_id dwc3_qcom_acpi_match[] = {
{ "QCOM2430", (unsigned long)&sdm845_acpi_pdata },
{ "QCOM0304", (unsigned long)&sdm845_acpi_urs_pdata },
{ "QCOM0497", (unsigned long)&sdm845_acpi_urs_pdata },
{ "QCOM04A6", (unsigned long)&sdm845_acpi_pdata },
{ },
};
MODULE_DEVICE_TABLE(acpi, dwc3_qcom_acpi_match);
#endif
static struct platform_driver dwc3_qcom_driver = {
.probe = dwc3_qcom_probe,
.remove = dwc3_qcom_remove,
.driver = {
.name = "dwc3-qcom",
.pm = &dwc3_qcom_dev_pm_ops,
.of_match_table = dwc3_qcom_of_match,
.acpi_match_table = ACPI_PTR(dwc3_qcom_acpi_match),
},
};
module_platform_driver(dwc3_qcom_driver);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DesignWare DWC3 QCOM Glue Driver");
Reference in New Issue View Git Blame Copy Permalink