From 5a59bc544d00923ff715e2fe68ea537153f52dda Mon Sep 17 00:00:00 2001
From: Robert Jarzmik <rjarzmik@free.fr>
Date: Mon, 12 May 2008 10:47:56 -0700
Subject: [PATCH] USB: pxa27x_udc: minor fixes
Minor fixes to pxa27x udc driver :
- don't clobber driver model bus_id field
- wrong endianess fix (no functional change; cpu is little-endian)
- double udc disable fix
- resume/suspend fix (OTG hold bit)
- make driver pxa27x dependant (check cpu at runtime)
Signed-off-by: Robert Jarzmik <rjarzmik@free.fr>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/pxa27x_udc.c | 17 ++++++++---------
drivers/usb/gadget/pxa27x_udc.h | 8 ++++++++
2 files changed, 16 insertions(+), 9 deletions(-)
diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 75eba202f737..499b7a23f351 100644
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1546,7 +1546,6 @@ static __init void udc_init_data(struct pxa_udc *dev)
INIT_LIST_HEAD(&dev->gadget.ep0->ep_list);
dev->udc_usb_ep[0].pxa_ep = &dev->pxa_ep[0];
ep0_idle(dev);
- strcpy(dev->dev->bus_id, "");
/* PXA endpoints init */
for (i = 0; i < NR_PXA_ENDPOINTS; i++) {
@@ -1746,13 +1745,10 @@ static void handle_ep0_ctrl_req(struct pxa_udc *udc,
ep_err(ep, "wrong to have extra bytes for setup : 0x%08x\n", i);
}
- le16_to_cpus(&u.r.wValue);
- le16_to_cpus(&u.r.wIndex);
- le16_to_cpus(&u.r.wLength);
-
ep_dbg(ep, "SETUP %02x.%02x v%04x i%04x l%04x\n",
u.r.bRequestType, u.r.bRequest,
- u.r.wValue, u.r.wIndex, u.r.wLength);
+ le16_to_cpu(u.r.wValue), le16_to_cpu(u.r.wIndex),
+ le16_to_cpu(u.r.wLength));
if (unlikely(have_extrabytes))
goto stall;
@@ -2296,7 +2292,8 @@ static void pxa_udc_shutdown(struct platform_device *_dev)
{
struct pxa_udc *udc = platform_get_drvdata(_dev);
- udc_disable(udc);
+ if (udc_readl(udc, UDCCR) & UDCCR_UDE)
+ udc_disable(udc);
}
#ifdef CONFIG_PM
@@ -2361,9 +2358,8 @@ static int pxa_udc_resume(struct platform_device *_dev)
* Upon exit from sleep mode and before clearing OTGPH,
* Software must configure the USB OTG pad, UDC, and UHC
* to the state they were in before entering sleep mode.
- *
- * Should be : PSSR |= PSSR_OTGPH;
*/
+ PSSR |= PSSR_OTGPH;
return 0;
}
@@ -2387,6 +2383,9 @@ static struct platform_driver udc_driver = {
static int __init udc_init(void)
{
+ if (!cpu_is_pxa27x())
+ return -ENODEV;
+
printk(KERN_INFO "%s: version %s\n", driver_name, DRIVER_VERSION);
return platform_driver_probe(&udc_driver, pxa_udc_probe);
}
diff --git a/drivers/usb/gadget/pxa27x_udc.h b/drivers/usb/gadget/pxa27x_udc.h
index 1d1b7936ee11..97453db924ff 100644
--- a/drivers/usb/gadget/pxa27x_udc.h
+++ b/drivers/usb/gadget/pxa27x_udc.h
@@ -484,4 +484,12 @@ static inline struct pxa_udc *to_gadget_udc(struct usb_gadget *gadget)
#define ep_warn(ep, fmt, arg...) \
dev_warn(ep->dev->dev, "%s:%s:" fmt, EPNAME(ep), __func__, ## arg)
+/*
+ * Cannot include pxa-regs.h, as register names are similar.
+ * So PSSR is redefined here. This should be removed once UDC registers will
+ * be gone from pxa-regs.h.
+ */
+#define PSSR __REG(0x40F00004) /* Power Manager Sleep Status */
+#define PSSR_OTGPH (1 << 6) /* OTG Peripheral Hold */
+
#endif /* __LINUX_USB_GADGET_PXA27X_H */