On Thu, Oct 30, 2008 at 02:42:51PM +0530, Ajay Kumar Gupta wrote:
> Currently qh list for control, bulkin and bulkout are
> part of musb structure as musb->control, musb->in_bulk
> and musb->out_bulk.This patch makes it generic across
> hw_ep by removing them from musb and mapping them to
> in_list and out_list of hw_ep structure.
>
> Signed-off-by: Ravi Babu <ravibabu@xxxxxx>
> Signed-off-by: Swaminathan S <swami.iyer@xxxxxx>
> Signed-off-by: Thomas Abraham <t-abraham@xxxxxx>
> Signed-off-by: Ajay Kumar Gupta <ajay.gupta@xxxxxx>
> ---
> drivers/usb/musb/musb_core.c | 6 +++---
> drivers/usb/musb/musb_core.h | 7 ++++---
> drivers/usb/musb/musb_host.c | 36 ++++++++++++++++++------------------
> 3 files changed, 25 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
> index ebe0828..dbf8861 100644
> --- a/drivers/usb/musb/musb_core.c
> +++ b/drivers/usb/musb/musb_core.c
> @@ -1445,6 +1445,9 @@ static int __init musb_core_init(u16 musb_type, struct musb *musb)
>
> hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
> #ifdef CONFIG_USB_MUSB_HDRC_HCD
> + /* init list of in and out qhs */
> + INIT_LIST_HEAD(&hw_ep->in_list);
> + INIT_LIST_HEAD(&hw_ep->out_list);
> hw_ep->target_regs = MUSB_BUSCTL_OFFSET(i, 0) + mbase;
> hw_ep->rx_reinit = 1;
> hw_ep->tx_reinit = 1;
> @@ -1790,9 +1793,6 @@ allocate_instance(struct device *dev,
> /* usbcore sets dev->driver_data to hcd, and sometimes uses that... */
>
> musb = hcd_to_musb(hcd);
> - INIT_LIST_HEAD(&musb->control);
> - INIT_LIST_HEAD(&musb->in_bulk);
> - INIT_LIST_HEAD(&musb->out_bulk);
>
> hcd->uses_new_polling = 1;
>
> diff --git a/drivers/usb/musb/musb_core.h b/drivers/usb/musb/musb_core.h
> index 4972a3b..27cd1e3 100644
> --- a/drivers/usb/musb/musb_core.h
> +++ b/drivers/usb/musb/musb_core.h
> @@ -271,6 +271,10 @@ struct musb_hw_ep {
> struct musb_qh *in_qh;
> struct musb_qh *out_qh;
>
> + /* list of rx and tx qhs */
> + struct list_head in_list;
> + struct list_head out_list;
> +
> u8 rx_reinit;
> u8 tx_reinit;
> #endif
> @@ -328,9 +332,6 @@ struct musb {
> */
> struct musb_hw_ep *bulk_ep;
>
> - struct list_head control; /* of musb_qh */
> - struct list_head in_bulk; /* of musb_qh */
> - struct list_head out_bulk; /* of musb_qh */
> struct musb_qh *in[16];
> struct musb_qh *out[16];
> #endif
> diff --git a/drivers/usb/musb/musb_host.c b/drivers/usb/musb/musb_host.c
> index b77ca0b..014401c 100644
> --- a/drivers/usb/musb/musb_host.c
> +++ b/drivers/usb/musb/musb_host.c
> @@ -1223,7 +1223,7 @@ void musb_host_tx(struct musb *musb, u8 epnum)
> * transfer, if there's some other (nonperiodic) tx urb
> * that could use this fifo. (dma complicates it...)
> *
> - * if (bulk && qh->ring.next != &musb->out_bulk), then
> + * if (bulk && qh->ring.next != &hw_ep->out_list), then
> * we have a candidate... NAKing is *NOT* an error
> */
> musb_ep_select(mbase, epnum);
> @@ -1449,13 +1449,13 @@ void musb_host_rx(struct musb *musb, u8 epnum)
> * transfer, if there's some other (nonperiodic) rx urb
> * that could use this fifo. (dma complicates it...)
> *
> - * if (bulk && qh->ring.next != &musb->in_bulk), then
> + * if (bulk && qh->ring.next != &hw_wp->in_list), then
> * we have a candidate... NAKing is *NOT* an error
> */
> DBG(6, "RX end %d NAK timeout\n", epnum);
> if (usb_pipebulk(urb->pipe) && qh->mux == 1 &&
> - (musb->in_bulk.next->next != &musb->in_bulk) &&
> - bulk_nak_timeout) {
> + (hw_ep->in_list.next->next != &hw_ep->in_list)
> + && bulk_nak_timeout) {
> musb_bulk_nak_timeout(musb, hw_ep);
> return;
> }
> @@ -1744,8 +1744,8 @@ static int musb_schedule(
>
> /* use fixed hardware for control and bulk */
> if (qh->type == USB_ENDPOINT_XFER_CONTROL) {
> - head = &musb->control;
> hw_ep = musb->control_ep;
> + head = &hw_ep->in_list;
yeah, this looks odd. It really looks like control can only be done for
in transfers. At least a comment in the structure would be nice. Also,
do you have any measurement of improvements after this patch ?
--
balbi
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