diff options
| author | Thirupathi Chippakurthy <thirupathi.chippakurthy@stericsson.com> | 2011-09-06 10:44:44 +0530 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@stericsson.com> | 2011-09-19 16:07:25 +0200 |
| commit | 2bce15e15a70d11524f9ffe78ef7dd0823440f0a (patch) | |
| tree | b49752e943c4f065f7f34e3d087c9a56ad48d5b0 /drivers/usb/musb | |
| parent | 6ef82cb4ada0797d06942830c6a7b0d657adb693 (diff) | |
musb: host: unmap the buffer for PIO in EP0
The USB stack maps the buffer for DMA if the controller
supports DMA.The buffer needs to be unmapped before CPU
can perform PIO data transfers.
ST-Ericsson ID: 353110
ST-Ericsson Linux next: NA
ST-Ericsson FOSS-OUT ID: Trivial
Change-Id: I7811591f4f82f06af036bbde28cfa6f6de40cf8d
Signed-off-by: <thirupathi.chippakurthy@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30144
Reviewed-by: Praveena NADAHALLY <praveen.nadahally@stericsson.com>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/musb_host.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c index 73ebcca75b0..ff02e5924fb 100644 --- a/drivers/usb/musb/musb_host.c +++ b/drivers/usb/musb/musb_host.c @@ -813,6 +813,8 @@ static void musb_ep_program(struct musb *musb, u8 epnum, if (hw_ep->do_tx_pio) { /* PIO to load FIFO */ + /* Unmap the buffer so that CPU can use it */ + usb_hcd_unmap_urb_for_dma(musb_to_hcd(musb), urb); qh->segsize = load_count; musb_write_fifo(hw_ep, load_count, buf); } @@ -905,6 +907,8 @@ static bool musb_h_ep0_continue(struct musb *musb, u16 len, struct urb *urb) if (fifo_count < len) urb->status = -EOVERFLOW; + /* Unmap the buffer so that CPU can use it */ + usb_hcd_unmap_urb_for_dma(musb_to_hcd(musb), urb); musb_read_fifo(hw_ep, fifo_count, fifo_dest); urb->actual_length += fifo_count; @@ -944,6 +948,8 @@ static bool musb_h_ep0_continue(struct musb *musb, u16 len, struct urb *urb) fifo_count, (fifo_count == 1) ? "" : "s", fifo_dest); + /* Unmap the buffer so that CPU can use it */ + usb_hcd_unmap_urb_for_dma(musb_to_hcd(musb), urb); musb_write_fifo(hw_ep, fifo_count, fifo_dest); urb->actual_length += fifo_count; |