diff options
Diffstat (limited to 'drivers/usb/gadget/goku_udc.c')
| -rw-r--r-- | drivers/usb/gadget/goku_udc.c | 87 |
1 files changed, 18 insertions, 69 deletions
diff --git a/drivers/usb/gadget/goku_udc.c b/drivers/usb/gadget/goku_udc.c index ae931af05ce..349b8166f34 100644 --- a/drivers/usb/gadget/goku_udc.c +++ b/drivers/usb/gadget/goku_udc.c @@ -20,7 +20,6 @@ * - DMA works with ep1 (OUT transfers) and ep2 (IN transfers). */ -#undef DEBUG // #define VERBOSE /* extra debug messages (success too) */ // #define USB_TRACE /* packet-level success messages */ @@ -296,51 +295,6 @@ goku_free_request(struct usb_ep *_ep, struct usb_request *_req) /*-------------------------------------------------------------------------*/ -/* allocating buffers this way eliminates dma mapping overhead, which - * on some platforms will mean eliminating a per-io buffer copy. with - * some kinds of system caches, further tweaks may still be needed. - */ -static void * -goku_alloc_buffer(struct usb_ep *_ep, unsigned bytes, - dma_addr_t *dma, gfp_t gfp_flags) -{ - void *retval; - struct goku_ep *ep; - - ep = container_of(_ep, struct goku_ep, ep); - if (!_ep) - return NULL; - *dma = DMA_ADDR_INVALID; - - if (ep->dma) { - /* the main problem with this call is that it wastes memory - * on typical 1/N page allocations: it allocates 1-N pages. - */ -#warning Using dma_alloc_coherent even with buffers smaller than a page. - retval = dma_alloc_coherent(&ep->dev->pdev->dev, - bytes, dma, gfp_flags); - } else - retval = kmalloc(bytes, gfp_flags); - return retval; -} - -static void -goku_free_buffer(struct usb_ep *_ep, void *buf, dma_addr_t dma, unsigned bytes) -{ - /* free memory into the right allocator */ - if (dma != DMA_ADDR_INVALID) { - struct goku_ep *ep; - - ep = container_of(_ep, struct goku_ep, ep); - if (!_ep) - return; - dma_free_coherent(&ep->dev->pdev->dev, bytes, buf, dma); - } else - kfree (buf); -} - -/*-------------------------------------------------------------------------*/ - static void done(struct goku_ep *ep, struct goku_request *req, int status) { @@ -485,7 +439,7 @@ top: /* use ep1/ep2 double-buffering for OUT */ if (!(size & PACKET_ACTIVE)) size = readl(®s->EPxSizeLB[ep->num]); - if (!(size & PACKET_ACTIVE)) // "can't happen" + if (!(size & PACKET_ACTIVE)) /* "can't happen" */ break; size &= DATASIZE; /* EPxSizeH == 0 */ @@ -1026,9 +980,6 @@ static struct usb_ep_ops goku_ep_ops = { .alloc_request = goku_alloc_request, .free_request = goku_free_request, - .alloc_buffer = goku_alloc_buffer, - .free_buffer = goku_free_buffer, - .queue = goku_queue, .dequeue = goku_dequeue, @@ -1140,17 +1091,17 @@ udc_proc_read(char *buffer, char **start, off_t off, int count, is_usb_connected ? ((tmp & PW_PULLUP) ? "full speed" : "powered") : "disconnected", - ({char *tmp; + ({char *state; switch(dev->ep0state){ - case EP0_DISCONNECT: tmp = "ep0_disconnect"; break; - case EP0_IDLE: tmp = "ep0_idle"; break; - case EP0_IN: tmp = "ep0_in"; break; - case EP0_OUT: tmp = "ep0_out"; break; - case EP0_STATUS: tmp = "ep0_status"; break; - case EP0_STALL: tmp = "ep0_stall"; break; - case EP0_SUSPEND: tmp = "ep0_suspend"; break; - default: tmp = "ep0_?"; break; - } tmp; }) + case EP0_DISCONNECT: state = "ep0_disconnect"; break; + case EP0_IDLE: state = "ep0_idle"; break; + case EP0_IN: state = "ep0_in"; break; + case EP0_OUT: state = "ep0_out"; break; + case EP0_STATUS: state = "ep0_status"; break; + case EP0_STALL: state = "ep0_stall"; break; + case EP0_SUSPEND: state = "ep0_suspend"; break; + default: state = "ep0_?"; break; + } state; }) ); size -= t; next += t; @@ -1195,7 +1146,6 @@ udc_proc_read(char *buffer, char **start, off_t off, int count, for (i = 0; i < 4; i++) { struct goku_ep *ep = &dev->ep [i]; struct goku_request *req; - int t; if (i && !ep->desc) continue; @@ -1283,7 +1233,7 @@ done: static void udc_reinit (struct goku_udc *dev) { static char *names [] = { "ep0", "ep1-bulk", "ep2-bulk", "ep3-bulk" }; - + unsigned i; INIT_LIST_HEAD (&dev->gadget.ep_list); @@ -1827,14 +1777,13 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) } /* alloc, and start init */ - dev = kmalloc (sizeof *dev, GFP_KERNEL); + dev = kzalloc (sizeof *dev, GFP_KERNEL); if (dev == NULL){ pr_debug("enomem %s\n", pci_name(pdev)); retval = -ENOMEM; goto done; } - memset(dev, 0, sizeof *dev); spin_lock_init(&dev->lock); dev->pdev = pdev; dev->gadget.ops = &goku_ops; @@ -1896,9 +1845,9 @@ static int goku_probe(struct pci_dev *pdev, const struct pci_device_id *id) /* done */ the_controller = dev; - device_register(&dev->gadget.dev); - - return 0; + retval = device_register(&dev->gadget.dev); + if (retval == 0) + return 0; done: if (dev) @@ -1910,8 +1859,8 @@ done: /*-------------------------------------------------------------------------*/ static struct pci_device_id pci_ids [] = { { - .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), - .class_mask = ~0, + .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), + .class_mask = ~0, .vendor = 0x102f, /* Toshiba */ .device = 0x0107, /* this UDC */ .subvendor = PCI_ANY_ID, |