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author | Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> | 2011-06-06 09:18:50 +0400 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-07 20:10:09 +0400 |
commit | d77e3f4e1743834c7b4acb54004ffd7f57c82582 (patch) | |
tree | 5ef953674c897b32134578654bc679e41039bfa9 /drivers/usb/renesas_usbhs/pipe.c | |
parent | d3af90a5e4e8fb7a93d408799682e566c9270808 (diff) | |
download | linux-d77e3f4e1743834c7b4acb54004ffd7f57c82582.tar.xz |
usb: renesas_usbhs: add pipe/fifo link
renesas_usbhs has CFIFO which is for PIO transfer,
and D0FIFO/D1FIFO which are for DMA transfer.
The pipe selects one of these fifo when it send/recv data.
But fifo must not be selected to different pipe in same time.
This patch add pipe/fifo link for each other,
and fifo is not selected by another pipe until it is unselected.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/renesas_usbhs/pipe.c')
-rw-r--r-- | drivers/usb/renesas_usbhs/pipe.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/usb/renesas_usbhs/pipe.c b/drivers/usb/renesas_usbhs/pipe.c index 56137d59e3b2..c0505876fd8c 100644 --- a/drivers/usb/renesas_usbhs/pipe.c +++ b/drivers/usb/renesas_usbhs/pipe.c @@ -562,6 +562,7 @@ void usbhs_pipe_init(struct usbhs_priv *priv, info->bufnmb_last++; usbhsp_flags_init(pipe); + pipe->fifo = NULL; pipe->mod_private = NULL; INIT_LIST_HEAD(&pipe->list); @@ -620,6 +621,18 @@ struct usbhs_pipe *usbhs_pipe_malloc(struct usbhs_priv *priv, return pipe; } +void usbhs_pipe_select_fifo(struct usbhs_pipe *pipe, struct usbhs_fifo *fifo) +{ + if (pipe->fifo) + pipe->fifo->pipe = NULL; + + pipe->fifo = fifo; + + if (fifo) + fifo->pipe = pipe; +} + + /* * dcp control */ |