Gitweb: http://git.kernel.org/linus/b633d28e2c5fbe1c8d163892644f57df04aa1421
Commit: b633d28e2c5fbe1c8d163892644f57df04aa1421
Parent: d24921a36df31332c32e1bb539671284d9e36bfa
Author: Darius Augulis <augulis.darius@gmail.com>
AuthorDate: Wed Jan 21 15:19:19 2009 +0200
Committer: Greg Kroah-Hartman <gregkh@suse.de>
CommitDate: Tue Mar 24 16:20:29 2009 -0700
USB: imx_udc: Fix IMX UDC gadget general irq handling
Workaround of hw bug in IMX UDC.
This bug causes wrong handling of CFG_CHG interrupt.
Workaround is documented inline source code.
Signed-off-by: Darius Augulis <augulis.darius@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
drivers/usb/gadget/imx_udc.c | 158 +++++++++++++++++++++++++-----------------
drivers/usb/gadget/imx_udc.h | 1 +
2 files changed, 94 insertions(+), 65 deletions(-)
diff --git a/drivers/usb/gadget/imx_udc.c b/drivers/usb/gadget/imx_udc.c
index e590464..8d3c6a9 100644
--- a/drivers/usb/gadget/imx_udc.c
+++ b/drivers/usb/gadget/imx_udc.c
@@ -28,6 +28,7 @@
#include <linux/dma-mapping.h>
#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/timer.h>
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
@@ -1013,70 +1014,32 @@ static void udc_stop_activity(struct imx_udc_struct *imx_usb,
*******************************************************************************
*/
-static irqreturn_t imx_udc_irq(int irq, void *dev)
+/*
+ * Called when timer expires.
+ * Timer is started when CFG_CHG is received.
+ */
+static void handle_config(unsigned long data)
{
- struct imx_udc_struct *imx_usb = dev;
+ struct imx_udc_struct *imx_usb = (void *)data;
struct usb_ctrlrequest u;
int temp, cfg, intf, alt;
- int intr = __raw_readl(imx_usb->base + USB_INTR);
-
- if (intr & (INTR_WAKEUP | INTR_SUSPEND | INTR_RESUME | INTR_RESET_START
- | INTR_RESET_STOP | INTR_CFG_CHG)) {
- dump_intr(__func__, intr, imx_usb->dev);
- dump_usb_stat(__func__, ...
