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| author | Ben Dooks <ben-linux@fluff.org> | 2010-07-19 09:40:43 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-10 14:35:42 -0700 |
| commit | b3864cedfb576e11d2f9274f14a24840d8b569c3 (patch) | |
| tree | 0aa873cdb6c3a87ea33b20feb3598628ef3fe2cf /drivers/usb/gadget/s3c-hsotg.c | |
| parent | e7a9ff54271bf0ddbf641e5a0bde3ebda35808be (diff) | |
| download | kernel_samsung_smdk4412-b3864cedfb576e11d2f9274f14a24840d8b569c3.zip kernel_samsung_smdk4412-b3864cedfb576e11d2f9274f14a24840d8b569c3.tar.gz kernel_samsung_smdk4412-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/gadget/s3c-hsotg.c')
| -rw-r--r-- | drivers/usb/gadget/s3c-hsotg.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c index 354fd45..9d32c9f 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); |