[PATCH v4 19/20] USB: phy-mv-usb: use phy-pxa-usb

Lubomir Rintel
2018-11-28T17:54:36Z

Use a proper PHY driver, instead of hooks to a board support package.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Tested-by: Pavel Machek <pavel@ucw.cz>
---
arch/arm/mach-mmp/devices.c | 11 +---
drivers/usb/phy/phy-mv-usb.c | 123 ++++++++++++++++-------------------
drivers/usb/phy/phy-mv-usb.h | 8 ++-
3 files changed, 62 insertions(+), 80 deletions(-)

diff --git a/arch/arm/mach-mmp/devices.c b/arch/arm/mach-mmp/devices.c
index 822b8be042b9..eb9b3c34e90a 100644
--- a/arch/arm/mach-mmp/devices.c
+++ b/arch/arm/mach-mmp/devices.c
@@ -325,21 +325,12 @@ struct platform_device pxa168_device_u2oehci = {

#if IS_ENABLED(CONFIG_USB_MV_OTG)
struct resource pxa168_u2ootg_resources[] = {
- /* regbase */
[0] = {
- .start = PXA168_U2O_REGBASE + U2x_CAPREGS_OFFSET,
+ .start = PXA168_U2O_REGBASE,
.end = PXA168_U2O_REGBASE + USB_REG_RANGE,
.flags = IORESOURCE_MEM,
- .name = "capregs",
},
- /* phybase */
[1] = {
- .start = PXA168_U2O_PHYBASE,
- .end = PXA168_U2O_PHYBASE + USB_PHY_RANGE,
- .flags = IORESOURCE_MEM,
- .name = "phyregs",
- },
- [2] = {
.start = IRQ_PXA168_USB1,
.end = IRQ_PXA168_USB1,
.flags = IORESOURCE_IRQ,
diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c
index cfd9add10bf4..0f67c5b65fe9 100644
--- a/drivers/usb/phy/phy-mv-usb.c
+++ b/drivers/usb/phy/phy-mv-usb.c
@@ -50,7 +50,7 @@ static char *state_string[] = {

static int mv_otg_set_vbus(struct usb_otg *otg, bool on)
{
- struct mv_otg *mvotg = container_of(otg->usb_phy, struct mv_otg, phy);
+ struct mv_otg *mvotg = container_of(otg->usb_phy, struct mv_otg, usb_phy);
if (mvotg->pdata->set_vbus == NULL)
return -ENODEV;

@@ -193,7 +193,7 @@ static void mv_otg_init_irq(struct mv_otg *mvotg)
static void mv_otg_start_host(struct mv_otg *mvotg, int on)
{
#ifdef CONFIG_USB
- struct usb_otg *otg = mvotg->phy.otg;
+ struct usb_otg *otg = mvotg->usb_phy.otg;
struct usb_hcd *hcd;

if (!otg->host)
@@ -214,12 +214,12 @@ static void mv_otg_start_host(struct mv_otg *mvotg, int on)

static void mv_otg_start_periphrals(struct mv_otg *mvotg, int on)
{
- struct usb_otg *otg = mvotg->phy.otg;
+ struct usb_otg *otg = mvotg->usb_phy.otg;

if (!otg->gadget)
return;

- dev_info(mvotg->phy.dev, "gadget %s\n", on ? "on" : "off");
+ dev_info(mvotg->usb_phy.dev, "gadget %s\n", on ? "on" : "off");

if (on)
usb_gadget_vbus_connect(otg->gadget);
@@ -247,14 +247,11 @@ static int mv_otg_enable_internal(struct mv_otg *mvotg)
dev_dbg(&mvotg->pdev->dev, "otg enabled\n");

otg_clock_enable(mvotg);
- if (mvotg->pdata->phy_init) {
- retval = mvotg->pdata->phy_init(mvotg->phy_regs);
- if (retval) {
- dev_err(&mvotg->pdev->dev,
- "init phy error %d\n", retval);
- otg_clock_disable(mvotg);
- return retval;
- }
+ retval = phy_init(mvotg->phy);
+ if (retval) {
+ dev_err(&mvotg->pdev->dev, "init phy error %d\n", retval);
+ otg_clock_disable(mvotg);
+ return retval;
}
mvotg->active = 1;

@@ -274,8 +271,7 @@ static void mv_otg_disable_internal(struct mv_otg *mvotg)
{
if (mvotg->active) {
dev_dbg(&mvotg->pdev->dev, "otg disabled\n");
- if (mvotg->pdata->phy_deinit)
- mvotg->pdata->phy_deinit(mvotg->phy_regs);
+ phy_exit(mvotg->phy);
otg_clock_disable(mvotg);
mvotg->active = 0;
}
@@ -329,68 +325,68 @@ static void mv_otg_update_inputs(struct mv_otg *mvotg)
static void mv_otg_update_state(struct mv_otg *mvotg)
{
struct mv_otg_ctrl *otg_ctrl = &mvotg->otg_ctrl;
- int old_state = mvotg->phy.otg->state;
+ int old_state = mvotg->usb_phy.otg->state;

switch (old_state) {
case OTG_STATE_UNDEFINED:
- mvotg->phy.otg->state = OTG_STATE_B_IDLE;
+ mvotg->usb_phy.otg->state = OTG_STATE_B_IDLE;
/* FALL THROUGH */
case OTG_STATE_B_IDLE:
if (otg_ctrl->id == 0)
- mvotg->phy.otg->state = OTG_STATE_A_IDLE;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_IDLE;
else if (otg_ctrl->b_sess_vld)
- mvotg->phy.otg->state = OTG_STATE_B_PERIPHERAL;
+ mvotg->usb_phy.otg->state = OTG_STATE_B_PERIPHERAL;
break;
case OTG_STATE_B_PERIPHERAL:
if (!otg_ctrl->b_sess_vld || otg_ctrl->id == 0)
- mvotg->phy.otg->state = OTG_STATE_B_IDLE;
+ mvotg->usb_phy.otg->state = OTG_STATE_B_IDLE;
break;
case OTG_STATE_A_IDLE:
if (otg_ctrl->id)
- mvotg->phy.otg->state = OTG_STATE_B_IDLE;
+ mvotg->usb_phy.otg->state = OTG_STATE_B_IDLE;
else if (!(otg_ctrl->a_bus_drop) &&
(otg_ctrl->a_bus_req || otg_ctrl->a_srp_det))
- mvotg->phy.otg->state = OTG_STATE_A_WAIT_VRISE;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_WAIT_VRISE;
break;
case OTG_STATE_A_WAIT_VRISE:
if (otg_ctrl->a_vbus_vld)
- mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_WAIT_BCON;
break;
case OTG_STATE_A_WAIT_BCON:
if (otg_ctrl->id || otg_ctrl->a_bus_drop
|| otg_ctrl->a_wait_bcon_timeout) {
mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_WAIT_VFALL;
otg_ctrl->a_bus_req = 0;
} else if (!otg_ctrl->a_vbus_vld) {
mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_VBUS_ERR;
} else if (otg_ctrl->b_conn) {
mv_otg_cancel_timer(mvotg, A_WAIT_BCON_TIMER);
mvotg->otg_ctrl.a_wait_bcon_timeout = 0;
- mvotg->phy.otg->state = OTG_STATE_A_HOST;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_HOST;
}
break;
case OTG_STATE_A_HOST:
if (otg_ctrl->id || !otg_ctrl->b_conn
|| otg_ctrl->a_bus_drop)
- mvotg->phy.otg->state = OTG_STATE_A_WAIT_BCON;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_WAIT_BCON;
else if (!otg_ctrl->a_vbus_vld)
- mvotg->phy.otg->state = OTG_STATE_A_VBUS_ERR;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_VBUS_ERR;
break;
case OTG_STATE_A_WAIT_VFALL:
if (otg_ctrl->id
|| (!otg_ctrl->b_conn && otg_ctrl->a_sess_vld)
|| otg_ctrl->a_bus_req)
- mvotg->phy.otg->state = OTG_STATE_A_IDLE;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_IDLE;
break;
case OTG_STATE_A_VBUS_ERR:
if (otg_ctrl->id || otg_ctrl->a_clr_err
|| otg_ctrl->a_bus_drop) {
otg_ctrl->a_clr_err = 0;
- mvotg->phy.otg->state = OTG_STATE_A_WAIT_VFALL;
+ mvotg->usb_phy.otg->state = OTG_STATE_A_WAIT_VFALL;
}
break;
default:
@@ -409,8 +405,8 @@ static void mv_otg_work(struct work_struct *work)

run:
/* work queue is single thread, or we need spin_lock to protect */
- phy = &mvotg->phy;
- otg = mvotg->phy.otg;
+ phy = &mvotg->usb_phy;
+ otg = mvotg->usb_phy.otg;
old_state = otg->state;

if (!mvotg->active)
@@ -419,24 +415,24 @@ static void mv_otg_work(struct work_struct *work)
mv_otg_update_inputs(mvotg);
mv_otg_update_state(mvotg);

- if (old_state != mvotg->phy.otg->state) {
+ if (old_state != mvotg->usb_phy.otg->state) {
dev_info(&mvotg->pdev->dev, "change from state %s to %s\n",
state_string[old_state],
- state_string[mvotg->phy.otg->state]);
+ state_string[mvotg->usb_phy.otg->state]);

- switch (mvotg->phy.otg->state) {
+ switch (mvotg->usb_phy.otg->state) {
case OTG_STATE_B_IDLE:
otg->default_a = 0;
if (old_state == OTG_STATE_B_PERIPHERAL)
mv_otg_start_periphrals(mvotg, 0);
mv_otg_reset(mvotg);
mv_otg_disable(mvotg);
- usb_phy_set_event(&mvotg->phy, USB_EVENT_NONE);
+ usb_phy_set_event(&mvotg->usb_phy, USB_EVENT_NONE);
break;
case OTG_STATE_B_PERIPHERAL:
mv_otg_enable(mvotg);
mv_otg_start_periphrals(mvotg, 1);
- usb_phy_set_event(&mvotg->phy, USB_EVENT_ENUMERATED);
+ usb_phy_set_event(&mvotg->usb_phy, USB_EVENT_ENUMERATED);
break;
case OTG_STATE_A_IDLE:
otg->default_a = 1;
@@ -536,8 +532,8 @@ a_bus_req_store(struct device *dev, struct device_attribute *attr,
return -1;

/* We will use this interface to change to A device */
- if (mvotg->phy.otg->state != OTG_STATE_B_IDLE
- && mvotg->phy.otg->state != OTG_STATE_A_IDLE)
+ if (mvotg->usb_phy.otg->state != OTG_STATE_B_IDLE
+ && mvotg->usb_phy.otg->state != OTG_STATE_A_IDLE)
return -1;

/* The clock may disabled and we need to set irq for ID detected */
@@ -566,7 +562,7 @@ a_clr_err_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct mv_otg *mvotg = dev_get_drvdata(dev);
- if (!mvotg->phy.otg->default_a)
+ if (!mvotg->usb_phy.otg->default_a)
return -1;

if (count > 2)
@@ -602,7 +598,7 @@ a_bus_drop_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct mv_otg *mvotg = dev_get_drvdata(dev);
- if (!mvotg->phy.otg->default_a)
+ if (!mvotg->usb_phy.otg->default_a)
return -1;

if (count > 2)
@@ -656,7 +652,7 @@ static int mv_otg_remove(struct platform_device *pdev)

mv_otg_disable(mvotg);

- usb_remove_phy(&mvotg->phy);
+ usb_remove_phy(&mvotg->usb_phy);

return 0;
}
@@ -687,6 +683,10 @@ static int mv_otg_probe(struct platform_device *pdev)
mvotg->pdev = pdev;
mvotg->pdata = pdata;

+ mvotg->phy = devm_phy_get(&pdev->dev, "usb");
+ if (IS_ERR(mvotg->phy))
+ return PTR_ERR(mvotg->phy);
+
mvotg->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(mvotg->clk))
return PTR_ERR(mvotg->clk);
@@ -701,12 +701,12 @@ static int mv_otg_probe(struct platform_device *pdev)

/* OTG common part */
mvotg->pdev = pdev;
- mvotg->phy.dev = &pdev->dev;
- mvotg->phy.otg = otg;
- mvotg->phy.label = driver_name;
+ mvotg->usb_phy.dev = &pdev->dev;
+ mvotg->usb_phy.otg = otg;
+ mvotg->usb_phy.label = driver_name;

otg->state = OTG_STATE_UNDEFINED;
- otg->usb_phy = &mvotg->phy;
+ otg->usb_phy = &mvotg->usb_phy;
otg->set_host = mv_otg_set_host;
otg->set_peripheral = mv_otg_set_peripheral;
otg->set_vbus = mv_otg_set_vbus;
@@ -715,36 +715,23 @@ static int mv_otg_probe(struct platform_device *pdev)
timer_setup(&mvotg->otg_ctrl.timer[i],
mv_otg_timer_await_bcon, 0);

- r = platform_get_resource_byname(mvotg->pdev,
- IORESOURCE_MEM, "phyregs");
- if (r == NULL) {
- dev_err(&pdev->dev, "no phy I/O memory resource defined\n");
- retval = -ENODEV;
- goto err_destroy_workqueue;
- }
-
- mvotg->phy_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
- if (mvotg->phy_regs == NULL) {
- dev_err(&pdev->dev, "failed to map phy I/O memory\n");
- retval = -EFAULT;
- goto err_destroy_workqueue;
- }
-
- r = platform_get_resource_byname(mvotg->pdev,
- IORESOURCE_MEM, "capregs");
+ r = platform_get_resource(mvotg->pdev, IORESOURCE_MEM, 0);
if (r == NULL) {
dev_err(&pdev->dev, "no I/O memory resource defined\n");
retval = -ENODEV;
goto err_destroy_workqueue;
}

- mvotg->cap_regs = devm_ioremap(&pdev->dev, r->start, resource_size(r));
- if (mvotg->cap_regs == NULL) {
+ mvotg->base = devm_ioremap(&pdev->dev, r->start, resource_size(r));
+ if (mvotg->base == NULL) {
dev_err(&pdev->dev, "failed to map I/O memory\n");
retval = -EFAULT;
goto err_destroy_workqueue;
}

+ mvotg->cap_regs =
+ (void __iomem *) ((unsigned long)mvotg->base + U2x_CAPREGS_OFFSET);
+
/* we will acces controller register, so enable the udc controller */
retval = mv_otg_enable_internal(mvotg);
if (retval) {
@@ -804,7 +791,7 @@ static int mv_otg_probe(struct platform_device *pdev)
goto err_disable_clk;
}

- retval = usb_add_phy(&mvotg->phy, USB_PHY_TYPE_USB2);
+ retval = usb_add_phy(&mvotg->usb_phy, USB_PHY_TYPE_USB2);
if (retval < 0) {
dev_err(&pdev->dev, "can't register transceiver, %d\n",
retval);
@@ -831,7 +818,7 @@ static int mv_otg_probe(struct platform_device *pdev)
return 0;

err_remove_phy:
- usb_remove_phy(&mvotg->phy);
+ usb_remove_phy(&mvotg->usb_phy);
err_disable_clk:
mv_otg_disable_internal(mvotg);
err_destroy_workqueue:
@@ -846,10 +833,10 @@ static int mv_otg_suspend(struct platform_device *pdev, pm_message_t state)
{
struct mv_otg *mvotg = platform_get_drvdata(pdev);

- if (mvotg->phy.otg->state != OTG_STATE_B_IDLE) {
+ if (mvotg->usb_phy.otg->state != OTG_STATE_B_IDLE) {
dev_info(&pdev->dev,
"OTG state is not B_IDLE, it is %d!\n",
- mvotg->phy.otg->state);
+ mvotg->usb_phy.otg->state);
return -EAGAIN;
}

diff --git a/drivers/usb/phy/phy-mv-usb.h b/drivers/usb/phy/phy-mv-usb.h
index 96701a1229ad..9b7bc6d958a8 100644
--- a/drivers/usb/phy/phy-mv-usb.h
+++ b/drivers/usb/phy/phy-mv-usb.h
@@ -8,6 +8,9 @@

#include <linux/types.h>

+/* registers */
+#define U2x_CAPREGS_OFFSET 0x100
+
/* Command Register Bit Masks */
#define USBCMD_RUN_STOP (0x00000001)
#define USBCMD_CTRL_RESET (0x00000002)
@@ -132,11 +135,11 @@ struct mv_otg_regs {
};

struct mv_otg {
- struct usb_phy phy;
+ struct usb_phy usb_phy;
struct mv_otg_ctrl otg_ctrl;

/* base address */
- void __iomem *phy_regs;
+ void __iomem *base;
void __iomem *cap_regs;
struct mv_otg_regs __iomem *op_regs;

@@ -155,6 +158,7 @@ struct mv_otg {
unsigned int active;
unsigned int clock_gating;
struct clk *clk;
+ struct phy *phy;
};

#endif
--
2.19.1