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| author | Sergei Shtylyov <sshtylyov@ru.mvista.com> | 2009-11-18 22:54:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-11 11:55:25 -0800 |
| commit | 46034dca515bc4ddca0399ae58106d1f5f0d809f (patch) | |
| tree | ea4a13b7f5ce2099470ed0d888cabf5cde0004f4 | |
| parent | 47e9760529a9823be59d879f726acdc7e2fcbe11 (diff) | |
| download | linux-stable-46034dca515bc4ddca0399ae58106d1f5f0d809f.tar.gz linux-stable-46034dca515bc4ddca0399ae58106d1f5f0d809f.tar.bz2 linux-stable-46034dca515bc4ddca0399ae58106d1f5f0d809f.zip | |
USB: musb_gadget_ep0: stop abusing musb_gadget_set_halt()
Stop playing with musb->lock and abusing musb_gadget_set_halt() in
the code clearing the endpoint halt feature -- instead, manipulate
the registers directly.
While at it, get rid uf unneeded line breaks and over-indentation in
the code setting the endpoint halt feature.
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/usb/musb/musb_gadget.h | 2 | ||||
| -rw-r--r-- | drivers/usb/musb/musb_gadget_ep0.c | 63 |
2 files changed, 38 insertions, 27 deletions
diff --git a/drivers/usb/musb/musb_gadget.h b/drivers/usb/musb/musb_gadget.h index 90966695ae53..c8b140325d82 100644 --- a/drivers/usb/musb/musb_gadget.h +++ b/drivers/usb/musb/musb_gadget.h @@ -105,6 +105,4 @@ extern void musb_gadget_cleanup(struct musb *); extern void musb_g_giveback(struct musb_ep *, struct usb_request *, int); -extern int musb_gadget_set_halt(struct usb_ep *ep, int value); - #endif /* __MUSB_GADGET_H */ diff --git a/drivers/usb/musb/musb_gadget_ep0.c b/drivers/usb/musb/musb_gadget_ep0.c index c63aff110c45..8fba3f11e473 100644 --- a/drivers/usb/musb/musb_gadget_ep0.c +++ b/drivers/usb/musb/musb_gadget_ep0.c @@ -257,19 +257,25 @@ __acquires(musb->lock) case USB_RECIP_INTERFACE: break; case USB_RECIP_ENDPOINT:{ - const u8 num = ctrlrequest->wIndex & 0x0f; - struct musb_ep *musb_ep; + const u8 epnum = + ctrlrequest->wIndex & 0x0f; + struct musb_ep *musb_ep; + struct musb_hw_ep *ep; + void __iomem *regs; + int is_in; + u16 csr; - if (num == 0 - || num >= MUSB_C_NUM_EPS - || ctrlrequest->wValue - != USB_ENDPOINT_HALT) + if (epnum == 0 || epnum >= MUSB_C_NUM_EPS || + ctrlrequest->wValue != USB_ENDPOINT_HALT) break; - if (ctrlrequest->wIndex & USB_DIR_IN) - musb_ep = &musb->endpoints[num].ep_in; + ep = musb->endpoints + epnum; + regs = ep->regs; + is_in = ctrlrequest->wIndex & USB_DIR_IN; + if (is_in) + musb_ep = &ep->ep_in; else - musb_ep = &musb->endpoints[num].ep_out; + musb_ep = &ep->ep_out; if (!musb_ep->desc) break; @@ -278,10 +284,23 @@ __acquires(musb->lock) if (musb_ep->wedged) break; - /* REVISIT do it directly, no locking games */ - spin_unlock(&musb->lock); - musb_gadget_set_halt(&musb_ep->end_point, 0); - spin_lock(&musb->lock); + musb_ep_select(mbase, epnum); + if (is_in) { + csr = musb_readw(regs, MUSB_TXCSR); + csr |= MUSB_TXCSR_CLRDATATOG | + MUSB_TXCSR_P_WZC_BITS; + csr &= ~(MUSB_TXCSR_P_SENDSTALL | + MUSB_TXCSR_P_SENTSTALL | + MUSB_TXCSR_TXPKTRDY); + musb_writew(regs, MUSB_TXCSR, csr); + } else { + csr = musb_readw(regs, MUSB_RXCSR); + csr |= MUSB_RXCSR_CLRDATATOG | + MUSB_RXCSR_P_WZC_BITS; + csr &= ~(MUSB_RXCSR_P_SENDSTALL | + MUSB_RXCSR_P_SENTSTALL); + musb_writew(regs, MUSB_RXCSR, csr); + } /* select ep0 again */ musb_ep_select(mbase, 0); @@ -377,10 +396,8 @@ stall: int is_in; u16 csr; - if (epnum == 0 - || epnum >= MUSB_C_NUM_EPS - || ctrlrequest->wValue - != USB_ENDPOINT_HALT) + if (epnum == 0 || epnum >= MUSB_C_NUM_EPS || + ctrlrequest->wValue != USB_ENDPOINT_HALT) break; ep = musb->endpoints + epnum; @@ -395,24 +412,20 @@ stall: musb_ep_select(mbase, epnum); if (is_in) { - csr = musb_readw(regs, - MUSB_TXCSR); + csr = musb_readw(regs, MUSB_TXCSR); if (csr & MUSB_TXCSR_FIFONOTEMPTY) csr |= MUSB_TXCSR_FLUSHFIFO; csr |= MUSB_TXCSR_P_SENDSTALL | MUSB_TXCSR_CLRDATATOG | MUSB_TXCSR_P_WZC_BITS; - musb_writew(regs, MUSB_TXCSR, - csr); + musb_writew(regs, MUSB_TXCSR, csr); } else { - csr = musb_readw(regs, - MUSB_RXCSR); + csr = musb_readw(regs, MUSB_RXCSR); csr |= MUSB_RXCSR_P_SENDSTALL | MUSB_RXCSR_FLUSHFIFO | MUSB_RXCSR_CLRDATATOG | MUSB_RXCSR_P_WZC_BITS; - musb_writew(regs, MUSB_RXCSR, - csr); + musb_writew(regs, MUSB_RXCSR, csr); } /* select ep0 again */ |