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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>
This commit is contained in:
Sergei Shtylyov 2009-11-18 22:54:32 +03:00 committed by Greg Kroah-Hartman
parent 47e9760529
commit 46034dca51
2 changed files with 38 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/musb/musb_gadget.h
View File

@ -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 */

63
drivers/usb/musb/musb_gadget_ep0.c
View File

@ -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 */