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authorBen Dooks <ben-linux@fluff.org>2010-07-19 09:40:43 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2010-08-10 14:35:42 -0700
commitb3864cedfb576e11d2f9274f14a24840d8b569c3 (patch)
tree0aa873cdb6c3a87ea33b20feb3598628ef3fe2cf /drivers/usb
parente7a9ff54271bf0ddbf641e5a0bde3ebda35808be (diff)
downloadlinux-b3864cedfb576e11d2f9274f14a24840d8b569c3.tar.bz2
USB: s3c-hsotg: Re-initialise all FIFOs on USB bus reset
The USB documentation suggest that the FIFOs should be reset when a bus reset event happens. Use the s3c_hsotg_init_fifo() to ensure that the FIFO layout is correct and that the FIFOs are flushed before acknowledging the reset. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
-rw-r--r--drivers/usb/gadget/s3c-hsotg.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 354fd456f8cc..9d32c9ff737d 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2082,17 +2082,12 @@ irq_retry:
kill_all_requests(hsotg, &hsotg->eps[0], -ECONNRESET, true);
/* it seems after a reset we can end up with a situation
- * where the TXFIFO still has data in it... try flushing
- * it to remove anything that may still be in it.
+ * where the TXFIFO still has data in it... the docs
+ * suggest resetting all the fifos, so use the init_fifo
+ * code to relayout and flush the fifos.
*/
- if (1) {
- writel(S3C_GRSTCTL_TxFNum(0) | S3C_GRSTCTL_TxFFlsh,
- hsotg->regs + S3C_GRSTCTL);
-
- dev_info(hsotg->dev, "GNPTXSTS=%08x\n",
- readl(hsotg->regs + S3C_GNPTXSTS));
- }
+ s3c_hsotg_init_fifo(hsotg);
s3c_hsotg_enqueue_setup(hsotg);