AM335x and TI81xx platform has dual musb controller so updating the
musb_dspc.c to support the same.
Changes:
- Moved otg_workaround timer to glue structure
- Moved static local variable last_timer to glue structure
- PHY on/off related cleanups
Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
Signed-off-by: Santhapuri, Damodar <damodar.santhapuri@xxxxxx>
Signed-off-by: Ravi Babu <ravibabu@xxxxxx>
---
drivers/usb/musb/musb_dsps.c | 112 +++++++++++++++++++++++++-----------------
1 files changed, 66 insertions(+), 46 deletions(-)
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
index 36130ba..f883c25 100644
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -106,6 +106,8 @@ struct dsps_musb_wrapper {
/* miscellaneous stuff */
u32 musb_core_offset;
u8 poll_seconds;
+ /* number of musb instances */
+ u8 instances;
};
/**
@@ -113,16 +115,18 @@ struct dsps_musb_wrapper {
*/
struct dsps_glue {
struct device *dev;
- struct platform_device *musb; /* child musb pdev */
+ struct platform_device *musb[2]; /* child musb pdev */
const struct dsps_musb_wrapper *wrp; /* wrapper register offsets */
- struct timer_list timer; /* otg_workaround timer */
- u32 __iomem *usb_ctrl;
+ struct timer_list timer[2]; /* otg_workaround timer */
+ unsigned long last_timer[2]; /* last timer data for each instance */
+ u32 __iomem *usb_ctrl[2];
u8 usbss_rev;
};
/**
* musb_dsps_phy_control - phy on/off
* @glue: struct dsps_glue *
+ * @id: musb instance
* @on: flag for phy to be switched on or off
*
* This is to enable the PHY using usb_ctrl register in system control
@@ -131,11 +135,11 @@ struct dsps_glue {
* XXX: This function will be removed once we have a seperate driver for
* control module
*/
-static void musb_dsps_phy_control(struct dsps_glue *glue, u8 on)
+static void musb_dsps_phy_control(struct dsps_glue *glue, u8 id, u8 on)
{
u32 usbphycfg;
- usbphycfg = __raw_readl(glue->usb_ctrl);
+ usbphycfg = __raw_readl(glue->usb_ctrl[id]);
if (on) {
if (glue->usbss_rev == MUSB_USBSS_REV_816X) {
@@ -158,7 +162,7 @@ static void musb_dsps_phy_control(struct dsps_glue *glue, u8 on)
glue->usbss_rev == MUSB_USBSS_REV_33XX)
usbphycfg |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
}
- __raw_writel(usbphycfg, glue->usb_ctrl);
+ __raw_writel(usbphycfg, glue->usb_ctrl[id]);
}
/**
* dsps_musb_enable - enable interrupts
@@ -207,8 +211,8 @@ static void otg_timer(unsigned long _musb)
struct musb *musb = (void *)_musb;
void __iomem *mregs = musb->mregs;
struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev->parent);
- struct dsps_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
u8 devctl;
unsigned long flags;
@@ -244,7 +248,7 @@ static void otg_timer(unsigned long _musb)
case OTG_STATE_B_IDLE:
devctl = dsps_readb(mregs, MUSB_DEVCTL);
if (devctl & MUSB_DEVCTL_BDEVICE)
- mod_timer(&glue->timer,
+ mod_timer(&glue->timer[pdev->id],
jiffies + wrp->poll_seconds * HZ);
else
musb->xceiv->state = OTG_STATE_A_IDLE;
@@ -258,9 +262,8 @@ static void otg_timer(unsigned long _musb)
static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
{
struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev->parent);
- struct dsps_glue *glue = platform_get_drvdata(pdev);
- static unsigned long last_timer;
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
if (timeout == 0)
timeout = jiffies + msecs_to_jiffies(3);
@@ -270,22 +273,23 @@ static void dsps_musb_try_idle(struct musb *musb, unsigned long timeout)
musb->xceiv->state == OTG_STATE_A_WAIT_BCON)) {
dev_dbg(musb->controller, "%s active, deleting timer\n",
otg_state_string(musb->xceiv->state));
- del_timer(&glue->timer);
- last_timer = jiffies;
+ del_timer(&glue->timer[pdev->id]);
+ glue->last_timer[pdev->id] = jiffies;
return;
}
- if (time_after(last_timer, timeout) && timer_pending(&glue->timer)) {
+ if (time_after(glue->last_timer[pdev->id], timeout) &&
+ timer_pending(&glue->timer[pdev->id])) {
dev_dbg(musb->controller,
"Longer idle timer already pending, ignoring...\n");
return;
}
- last_timer = timeout;
+ glue->last_timer[pdev->id] = timeout;
dev_dbg(musb->controller, "%s inactive, starting idle timer for %u ms\n",
otg_state_string(musb->xceiv->state),
jiffies_to_msecs(timeout - jiffies));
- mod_timer(&glue->timer, timeout);
+ mod_timer(&glue->timer[pdev->id], timeout);
}
static irqreturn_t dsps_interrupt(int irq, void *hci)
@@ -293,8 +297,8 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
struct musb *musb = hci;
void __iomem *reg_base = musb->ctrl_base;
struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev->parent);
- struct dsps_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
unsigned long flags;
irqreturn_t ret = IRQ_NONE;
@@ -353,7 +357,7 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
*/
musb->int_usb &= ~MUSB_INTR_VBUSERROR;
musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
- mod_timer(&glue->timer,
+ mod_timer(&glue->timer[pdev->id],
jiffies + wrp->poll_seconds * HZ);
WARNING("VBUS error workaround (delay coming)\n");
} else if (drvvbus) {
@@ -361,7 +365,7 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
MUSB_HST_MODE(musb);
musb->xceiv->otg->default_a = 1;
musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
- del_timer(&glue->timer);
+ del_timer(&glue->timer[pdev->id]);
} else {
musb->is_active = 0;
MUSB_DEV_MODE(musb);
@@ -388,7 +392,8 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
/* Poll for ID change */
if (musb->xceiv->state == OTG_STATE_B_IDLE)
- mod_timer(&glue->timer, jiffies + wrp->poll_seconds * HZ);
+ mod_timer(&glue->timer[pdev->id],
+ jiffies + wrp->poll_seconds * HZ);
spin_unlock_irqrestore(&musb->lock, flags);
@@ -398,8 +403,8 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
static int dsps_musb_init(struct musb *musb)
{
struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev->parent);
- struct dsps_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
const struct dsps_musb_wrapper *wrp = glue->wrp;
void __iomem *reg_base = musb->ctrl_base;
u32 rev, val;
@@ -421,13 +426,13 @@ static int dsps_musb_init(struct musb *musb)
goto err0;
}
- setup_timer(&glue->timer, otg_timer, (unsigned long) musb);
+ setup_timer(&glue->timer[pdev->id], otg_timer, (unsigned long) musb);
/* Reset the musb */
dsps_writel(reg_base, wrp->control, (1 << wrp->reset));
/* Start the on-chip PHY and its PLL. */
- musb_dsps_phy_control(glue, 1);
+ musb_dsps_phy_control(glue, pdev->id, 1);
musb->isr = dsps_interrupt;
@@ -449,13 +454,13 @@ err0:
static int dsps_musb_exit(struct musb *musb)
{
struct device *dev = musb->controller;
- struct platform_device *pdev = to_platform_device(dev->parent);
- struct dsps_glue *glue = platform_get_drvdata(pdev);
+ struct platform_device *pdev = to_platform_device(dev);
+ struct dsps_glue *glue = dev_get_drvdata(dev->parent);
- del_timer_sync(&glue->timer);
+ del_timer_sync(&glue->timer[pdev->id]);
/* Shutdown the on-chip PHY and its PLL. */
- musb_dsps_phy_control(glue, 0);
+ musb_dsps_phy_control(glue, pdev->id, 0);
/* NOP driver needs change if supporting dual instance */
usb_put_phy(musb->xceiv);
@@ -495,8 +500,8 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
goto err0;
}
- glue->usb_ctrl = devm_request_and_ioremap(&pdev->dev, res);
- if (glue->usb_ctrl == NULL) {
+ glue->usb_ctrl[id] = devm_request_and_ioremap(&pdev->dev, res);
+ if (glue->usb_ctrl[id] == NULL) {
dev_err(dev, "Failed to obtain usb_ctrl%d memory\n", id);
ret = -ENODEV;
goto err0;
@@ -545,7 +550,7 @@ static int __devinit dsps_create_musb_pdev(struct dsps_glue *glue, u8 id)
musb->dev.dma_mask = &musb_dmamask;
musb->dev.coherent_dma_mask = musb_dmamask;
- glue->musb = musb;
+ glue->musb[id] = musb;
pdata->platform_ops = &dsps_ops;
@@ -577,11 +582,11 @@ err0:
return ret;
}
-static void __devexit dsps_delete_musb_pdev(struct dsps_glue *glue)
+static void __devexit dsps_delete_musb_pdev(struct dsps_glue *glue, u8 id)
{
- musb_put_id(glue->dev, glue->musb->id);
- platform_device_del(glue->musb);
- platform_device_put(glue->musb);
+ musb_put_id(glue->dev, glue->musb[id]->id);
+ platform_device_del(glue->musb[id]);
+ platform_device_put(glue->musb[id]);
}
static int __devinit dsps_probe(struct platform_device *pdev)
@@ -592,7 +597,7 @@ static int __devinit dsps_probe(struct platform_device *pdev)
struct dsps_glue *glue;
struct resource *iomem;
u32 __iomem *usbss;
- int ret;
+ int ret, i;
/* allocate glue */
glue = kzalloc(sizeof(*glue), GFP_KERNEL);
@@ -636,11 +641,16 @@ static int __devinit dsps_probe(struct platform_device *pdev)
goto err2;
}
- /* create the child platform device for first instances of musb */
- ret = dsps_create_musb_pdev(glue, 0);
- if (ret != 0) {
- dev_err(&pdev->dev, "failed to create child pdev\n");
- goto err3;
+ /* create the child platform device for all instances of musb */
+ for (i = 0; i < wrp->instances ; i++) {
+ ret = dsps_create_musb_pdev(glue, i);
+ if (ret != 0) {
+ dev_err(&pdev->dev, "failed to create child pdev\n");
+ /* release resources of previously created instances */
+ for (i--; i >= 0 ; i--)
+ dsps_delete_musb_pdev(glue, i);
+ goto err3;
+ }
}
/* read the usbss revision register */
@@ -661,9 +671,12 @@ err0:
static int __devexit dsps_remove(struct platform_device *pdev)
{
struct dsps_glue *glue = platform_get_drvdata(pdev);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ int i;
/* delete the child platform device */
- dsps_delete_musb_pdev(glue);
+ for (i = 0; i < wrp->instances ; i++)
+ dsps_delete_musb_pdev(glue, i);
/* disable usbss clocks */
pm_runtime_put(&pdev->dev);
@@ -678,9 +691,12 @@ static int dsps_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev->parent);
struct dsps_glue *glue = platform_get_drvdata(pdev);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ int i;
/* Shutdown the on-chip PHY and its PLL. */
- musb_dsps_phy_control(glue, 0);
+ for (i = 0 ; i < wrp->instances ; i++)
+ musb_dsps_phy_control(glue, i, 0);
return 0;
}
@@ -689,9 +705,12 @@ static int dsps_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev->parent);
struct dsps_glue *glue = platform_get_drvdata(pdev);
+ const struct dsps_musb_wrapper *wrp = glue->wrp;
+ int i;
/* Start the on-chip PHY and its PLL. */
- musb_dsps_phy_control(glue, 1);
+ for (i = 0 ; i < wrp->instances ; i++)
+ musb_dsps_phy_control(glue, i, 1);
return 0;
}
@@ -727,6 +746,7 @@ static const struct dsps_musb_wrapper ti81xx_driver_data __devinitconst = {
.rxep_bitmap = (0xfffe << 16),
.musb_core_offset = 0x400,
.poll_seconds = 2,
+ .instances = 2,
};
static const struct platform_device_id musb_dsps_id_table[] __devinitconst = {
--
1.7.0.4
--
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