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authorKuninori Morimoto <kuninori.morimoto.gx@renesas.com>2011-06-06 09:18:50 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2011-06-07 20:10:09 +0400
commitd77e3f4e1743834c7b4acb54004ffd7f57c82582 (patch)
tree5ef953674c897b32134578654bc679e41039bfa9 /drivers/usb/renesas_usbhs/pipe.c
parentd3af90a5e4e8fb7a93d408799682e566c9270808 (diff)
downloadlinux-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.c13
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
*/