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-rw-r--r--drivers/usb/phy/phy-fsl-usb.c35
-rw-r--r--drivers/usb/phy/phy-generic.c146
-rw-r--r--drivers/usb/phy/phy-generic.h10
-rw-r--r--drivers/usb/phy/phy-mxs-usb.c15
4 files changed, 128 insertions, 78 deletions
diff --git a/drivers/usb/phy/phy-fsl-usb.c b/drivers/usb/phy/phy-fsl-usb.c
index ab38aa32a6c1..94eb2923afed 100644
--- a/drivers/usb/phy/phy-fsl-usb.c
+++ b/drivers/usb/phy/phy-fsl-usb.c
@@ -107,19 +107,6 @@ static void (*_fsl_writel)(u32 v, unsigned __iomem *p);
#define fsl_writel(val, addr) writel(val, addr)
#endif /* CONFIG_PPC32 */
-/* Routines to access transceiver ULPI registers */
-u8 view_ulpi(u8 addr)
-{
- u32 temp;
-
- temp = 0x40000000 | (addr << 16);
- fsl_writel(temp, &usb_dr_regs->ulpiview);
- udelay(1000);
- while (temp & 0x40)
- temp = fsl_readl(&usb_dr_regs->ulpiview);
- return (le32_to_cpu(temp) & 0x0000ff00) >> 8;
-}
-
int write_ulpi(u8 addr, u8 data)
{
u32 temp;
@@ -460,28 +447,6 @@ static void fsl_otg_fsm_del_timer(struct otg_fsm *fsm, enum otg_fsm_timer t)
fsl_otg_del_timer(fsm, timer);
}
-/*
- * Reduce timer count by 1, and find timeout conditions.
- * Called by fsl_otg 1ms timer interrupt
- */
-int fsl_otg_tick_timer(void)
-{
- struct fsl_otg_timer *tmp_timer, *del_tmp;
- int expired = 0;
-
- list_for_each_entry_safe(tmp_timer, del_tmp, &active_timers, list) {
- tmp_timer->count--;
- /* check if timer expires */
- if (!tmp_timer->count) {
- list_del(&tmp_timer->list);
- tmp_timer->function(tmp_timer->data);
- expired = 1;
- }
- }
-
- return expired;
-}
-
/* Reset controller, not reset the bus */
void otg_reset_controller(void)
{
diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
index f1b719b45a53..dd05254241fb 100644
--- a/drivers/usb/phy/phy-generic.c
+++ b/drivers/usb/phy/phy-generic.c
@@ -27,6 +27,7 @@
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
+#include <linux/usb/gadget.h>
#include <linux/usb/otg.h>
#include <linux/usb/usb_phy_generic.h>
#include <linux/slab.h>
@@ -39,6 +40,9 @@
#include "phy-generic.h"
+#define VBUS_IRQ_FLAGS \
+ (IRQF_SHARED | IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)
+
struct platform_device *usb_phy_generic_register(void)
{
return platform_device_register_simple("usb_phy_generic",
@@ -59,19 +63,78 @@ static int nop_set_suspend(struct usb_phy *x, int suspend)
static void nop_reset_set(struct usb_phy_generic *nop, int asserted)
{
- int value;
+ if (nop->gpiod_reset)
+ gpiod_set_value(nop->gpiod_reset, asserted);
+
+ if (!asserted)
+ usleep_range(10000, 20000);
+}
- if (!gpio_is_valid(nop->gpio_reset))
+/* interface to regulator framework */
+static void nop_set_vbus_draw(struct usb_phy_generic *nop, unsigned mA)
+{
+ struct regulator *vbus_draw = nop->vbus_draw;
+ int enabled;
+ int ret;
+
+ if (!vbus_draw)
return;
- value = asserted;
- if (nop->reset_active_low)
- value = !value;
+ enabled = nop->vbus_draw_enabled;
+ if (mA) {
+ regulator_set_current_limit(vbus_draw, 0, 1000 * mA);
+ if (!enabled) {
+ ret = regulator_enable(vbus_draw);
+ if (ret < 0)
+ return;
+ nop->vbus_draw_enabled = 1;
+ }
+ } else {
+ if (enabled) {
+ ret = regulator_disable(vbus_draw);
+ if (ret < 0)
+ return;
+ nop->vbus_draw_enabled = 0;
+ }
+ }
+ nop->mA = mA;
+}
- gpio_set_value_cansleep(nop->gpio_reset, value);
- if (!asserted)
- usleep_range(10000, 20000);
+static irqreturn_t nop_gpio_vbus_thread(int irq, void *data)
+{
+ struct usb_phy_generic *nop = data;
+ struct usb_otg *otg = nop->phy.otg;
+ int vbus, status;
+
+ vbus = gpiod_get_value(nop->gpiod_vbus);
+ if ((vbus ^ nop->vbus) == 0)
+ return IRQ_HANDLED;
+ nop->vbus = vbus;
+
+ if (vbus) {
+ status = USB_EVENT_VBUS;
+ otg->state = OTG_STATE_B_PERIPHERAL;
+ nop->phy.last_event = status;
+ usb_gadget_vbus_connect(otg->gadget);
+
+ /* drawing a "unit load" is *always* OK, except for OTG */
+ nop_set_vbus_draw(nop, 100);
+
+ atomic_notifier_call_chain(&nop->phy.notifier, status,
+ otg->gadget);
+ } else {
+ nop_set_vbus_draw(nop, 0);
+
+ usb_gadget_vbus_disconnect(otg->gadget);
+ status = USB_EVENT_NONE;
+ otg->state = OTG_STATE_B_IDLE;
+ nop->phy.last_event = status;
+
+ atomic_notifier_call_chain(&nop->phy.notifier, status,
+ otg->gadget);
+ }
+ return IRQ_HANDLED;
}
int usb_gen_phy_init(struct usb_phy *phy)
@@ -143,35 +206,44 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
struct usb_phy_generic_platform_data *pdata)
{
enum usb_phy_type type = USB_PHY_TYPE_USB2;
- int err;
+ int err = 0;
u32 clk_rate = 0;
bool needs_vcc = false;
- nop->reset_active_low = true; /* default behaviour */
-
if (dev->of_node) {
struct device_node *node = dev->of_node;
- enum of_gpio_flags flags = 0;
if (of_property_read_u32(node, "clock-frequency", &clk_rate))
clk_rate = 0;
needs_vcc = of_property_read_bool(node, "vcc-supply");
- nop->gpio_reset = of_get_named_gpio_flags(node, "reset-gpios",
- 0, &flags);
- if (nop->gpio_reset == -EPROBE_DEFER)
- return -EPROBE_DEFER;
-
- nop->reset_active_low = flags & OF_GPIO_ACTIVE_LOW;
-
+ nop->gpiod_reset = devm_gpiod_get(dev, "reset-gpios");
+ err = PTR_ERR(nop->gpiod_reset);
+ if (!err) {
+ nop->gpiod_vbus = devm_gpiod_get(dev,
+ "vbus-detect-gpio");
+ err = PTR_ERR(nop->gpiod_vbus);
+ }
} else if (pdata) {
type = pdata->type;
clk_rate = pdata->clk_rate;
needs_vcc = pdata->needs_vcc;
- nop->gpio_reset = pdata->gpio_reset;
- } else {
- nop->gpio_reset = -1;
+ if (gpio_is_valid(pdata->gpio_reset)) {
+ err = devm_gpio_request_one(dev, pdata->gpio_reset, 0,
+ dev_name(dev));
+ if (!err)
+ nop->gpiod_reset =
+ gpio_to_desc(pdata->gpio_reset);
+ }
+ nop->gpiod_vbus = pdata->gpiod_vbus;
+ }
+
+ if (err == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ if (err) {
+ dev_err(dev, "Error requesting RESET GPIO\n");
+ return err;
}
nop->phy.otg = devm_kzalloc(dev, sizeof(*nop->phy.otg),
@@ -201,24 +273,6 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
return -EPROBE_DEFER;
}
- if (gpio_is_valid(nop->gpio_reset)) {
- unsigned long gpio_flags;
-
- /* Assert RESET */
- if (nop->reset_active_low)
- gpio_flags = GPIOF_OUT_INIT_LOW;
- else
- gpio_flags = GPIOF_OUT_INIT_HIGH;
-
- err = devm_gpio_request_one(dev, nop->gpio_reset,
- gpio_flags, dev_name(dev));
- if (err) {
- dev_err(dev, "Error requesting RESET GPIO %d\n",
- nop->gpio_reset);
- return err;
- }
- }
-
nop->dev = dev;
nop->phy.dev = nop->dev;
nop->phy.label = "nop-xceiv";
@@ -247,6 +301,18 @@ static int usb_phy_generic_probe(struct platform_device *pdev)
err = usb_phy_gen_create_phy(dev, nop, dev_get_platdata(&pdev->dev));
if (err)
return err;
+ if (nop->gpiod_vbus) {
+ err = devm_request_threaded_irq(&pdev->dev,
+ gpiod_to_irq(nop->gpiod_vbus),
+ NULL, nop_gpio_vbus_thread,
+ VBUS_IRQ_FLAGS, "vbus_detect",
+ nop);
+ if (err) {
+ dev_err(&pdev->dev, "can't request irq %i, err: %d\n",
+ gpiod_to_irq(nop->gpiod_vbus), err);
+ return err;
+ }
+ }
nop->phy.init = usb_gen_phy_init;
nop->phy.shutdown = usb_gen_phy_shutdown;
diff --git a/drivers/usb/phy/phy-generic.h b/drivers/usb/phy/phy-generic.h
index d8feacc0b7fb..0d0eadd54ed9 100644
--- a/drivers/usb/phy/phy-generic.h
+++ b/drivers/usb/phy/phy-generic.h
@@ -2,14 +2,20 @@
#define _PHY_GENERIC_H_
#include <linux/usb/usb_phy_generic.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
struct usb_phy_generic {
struct usb_phy phy;
struct device *dev;
struct clk *clk;
struct regulator *vcc;
- int gpio_reset;
- bool reset_active_low;
+ struct gpio_desc *gpiod_reset;
+ struct gpio_desc *gpiod_vbus;
+ struct regulator *vbus_draw;
+ bool vbus_draw_enabled;
+ unsigned long mA;
+ unsigned int vbus;
};
int usb_gen_phy_init(struct usb_phy *phy);
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index b9589f663683..58cae78b12a4 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -293,6 +293,17 @@ static int mxs_phy_init(struct usb_phy *phy)
static void mxs_phy_shutdown(struct usb_phy *phy)
{
struct mxs_phy *mxs_phy = to_mxs_phy(phy);
+ u32 value = BM_USBPHY_CTRL_ENVBUSCHG_WKUP |
+ BM_USBPHY_CTRL_ENDPDMCHG_WKUP |
+ BM_USBPHY_CTRL_ENIDCHG_WKUP |
+ BM_USBPHY_CTRL_ENAUTOSET_USBCLKS |
+ BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE |
+ BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD |
+ BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE |
+ BM_USBPHY_CTRL_ENAUTO_PWRON_PLL;
+
+ writel(value, phy->io_priv + HW_USBPHY_CTRL_CLR);
+ writel(0xffffffff, phy->io_priv + HW_USBPHY_PWD);
writel(BM_USBPHY_CTRL_CLKGATE,
phy->io_priv + HW_USBPHY_CTRL_SET);
@@ -359,7 +370,9 @@ static int mxs_phy_on_disconnect(struct usb_phy *phy,
dev_dbg(phy->dev, "%s device has disconnected\n",
(speed == USB_SPEED_HIGH) ? "HS" : "FS/LS");
- if (speed == USB_SPEED_HIGH)
+ /* Sometimes, the speed is not high speed when the error occurs */
+ if (readl(phy->io_priv + HW_USBPHY_CTRL) &
+ BM_USBPHY_CTRL_ENHOSTDISCONDETECT)
writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT,
phy->io_priv + HW_USBPHY_CTRL_CLR);
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-30 19:25:07 +0100