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author | Sudip Mukherjee <sudipm.mukherjee@gmail.com> | 2015-09-22 18:54:33 +0530 |
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committer | Felipe Balbi <balbi@ti.com> | 2015-10-01 12:40:21 -0500 |
commit | c9760ad817091b19fcbb86c8cb5e1ab9e90d913b (patch) | |
tree | 0971bcd5186547ebadead0d4520716feac353d99 /drivers/usb/gadget | |
parent | 79a5b4aa3511f82e1398223062cd62051044288d (diff) | |
download | linux-stable-c9760ad817091b19fcbb86c8cb5e1ab9e90d913b.tar.gz linux-stable-c9760ad817091b19fcbb86c8cb5e1ab9e90d913b.tar.bz2 linux-stable-c9760ad817091b19fcbb86c8cb5e1ab9e90d913b.zip |
usb: gadget: amd5536udc: remove forward declaration of udc_create_dma_chain
Rearrange udc_create_dma_chain to remove the forward declaration. While
rearranging fixed the relevant checkpatch warnings.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget')
-rw-r--r-- | drivers/usb/gadget/udc/amd5536udc.c | 238 |
1 files changed, 117 insertions, 121 deletions
diff --git a/drivers/usb/gadget/udc/amd5536udc.c b/drivers/usb/gadget/udc/amd5536udc.c index f218520356ff..2602173d68d4 100644 --- a/drivers/usb/gadget/udc/amd5536udc.c +++ b/drivers/usb/gadget/udc/amd5536udc.c @@ -71,8 +71,6 @@ static void udc_soft_reset(struct udc *dev); static struct udc_request *udc_alloc_bna_dummy(struct udc_ep *ep); static void udc_free_request(struct usb_ep *usbep, struct usb_request *usbreq); static int udc_free_dma_chain(struct udc *dev, struct udc_request *req); -static int udc_create_dma_chain(struct udc_ep *ep, struct udc_request *req, - unsigned long buf_len, gfp_t gfp_flags); static int udc_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id); static void udc_pci_remove(struct pci_dev *pdev); @@ -787,6 +785,123 @@ udc_rxfifo_read(struct udc_ep *ep, struct udc_request *req) return finished; } +/* Creates or re-inits a DMA chain */ +static int udc_create_dma_chain( + struct udc_ep *ep, + struct udc_request *req, + unsigned long buf_len, gfp_t gfp_flags +) +{ + unsigned long bytes = req->req.length; + unsigned int i; + dma_addr_t dma_addr; + struct udc_data_dma *td = NULL; + struct udc_data_dma *last = NULL; + unsigned long txbytes; + unsigned create_new_chain = 0; + unsigned len; + + VDBG(ep->dev, "udc_create_dma_chain: bytes=%ld buf_len=%ld\n", + bytes, buf_len); + dma_addr = DMA_DONT_USE; + + /* unset L bit in first desc for OUT */ + if (!ep->in) + req->td_data->status &= AMD_CLEAR_BIT(UDC_DMA_IN_STS_L); + + /* alloc only new desc's if not already available */ + len = req->req.length / ep->ep.maxpacket; + if (req->req.length % ep->ep.maxpacket) + len++; + + if (len > req->chain_len) { + /* shorter chain already allocated before */ + if (req->chain_len > 1) + udc_free_dma_chain(ep->dev, req); + req->chain_len = len; + create_new_chain = 1; + } + + td = req->td_data; + /* gen. required number of descriptors and buffers */ + for (i = buf_len; i < bytes; i += buf_len) { + /* create or determine next desc. */ + if (create_new_chain) { + td = pci_pool_alloc(ep->dev->data_requests, + gfp_flags, &dma_addr); + if (!td) + return -ENOMEM; + + td->status = 0; + } else if (i == buf_len) { + /* first td */ + td = (struct udc_data_dma *)phys_to_virt( + req->td_data->next); + td->status = 0; + } else { + td = (struct udc_data_dma *)phys_to_virt(last->next); + td->status = 0; + } + + if (td) + td->bufptr = req->req.dma + i; /* assign buffer */ + else + break; + + /* short packet ? */ + if ((bytes - i) >= buf_len) { + txbytes = buf_len; + } else { + /* short packet */ + txbytes = bytes - i; + } + + /* link td and assign tx bytes */ + if (i == buf_len) { + if (create_new_chain) + req->td_data->next = dma_addr; + /* + * else + * req->td_data->next = virt_to_phys(td); + */ + /* write tx bytes */ + if (ep->in) { + /* first desc */ + req->td_data->status = + AMD_ADDBITS(req->td_data->status, + ep->ep.maxpacket, + UDC_DMA_IN_STS_TXBYTES); + /* second desc */ + td->status = AMD_ADDBITS(td->status, + txbytes, + UDC_DMA_IN_STS_TXBYTES); + } + } else { + if (create_new_chain) + last->next = dma_addr; + /* + * else + * last->next = virt_to_phys(td); + */ + if (ep->in) { + /* write tx bytes */ + td->status = AMD_ADDBITS(td->status, + txbytes, + UDC_DMA_IN_STS_TXBYTES); + } + } + last = td; + } + /* set last bit */ + if (td) { + td->status |= AMD_BIT(UDC_DMA_IN_STS_L); + /* last desc. points to itself */ + req->td_data_last = td; + } + + return 0; +} + /* create/re-init a DMA descriptor or a DMA descriptor chain */ static int prep_dma(struct udc_ep *ep, struct udc_request *req, gfp_t gfp) { @@ -973,125 +1088,6 @@ static u32 udc_get_ppbdu_rxbytes(struct udc_request *req) } -/* Creates or re-inits a DMA chain */ -static int udc_create_dma_chain( - struct udc_ep *ep, - struct udc_request *req, - unsigned long buf_len, gfp_t gfp_flags -) -{ - unsigned long bytes = req->req.length; - unsigned int i; - dma_addr_t dma_addr; - struct udc_data_dma *td = NULL; - struct udc_data_dma *last = NULL; - unsigned long txbytes; - unsigned create_new_chain = 0; - unsigned len; - - VDBG(ep->dev, "udc_create_dma_chain: bytes=%ld buf_len=%ld\n", - bytes, buf_len); - dma_addr = DMA_DONT_USE; - - /* unset L bit in first desc for OUT */ - if (!ep->in) - req->td_data->status &= AMD_CLEAR_BIT(UDC_DMA_IN_STS_L); - - /* alloc only new desc's if not already available */ - len = req->req.length / ep->ep.maxpacket; - if (req->req.length % ep->ep.maxpacket) - len++; - - if (len > req->chain_len) { - /* shorter chain already allocated before */ - if (req->chain_len > 1) - udc_free_dma_chain(ep->dev, req); - req->chain_len = len; - create_new_chain = 1; - } - - td = req->td_data; - /* gen. required number of descriptors and buffers */ - for (i = buf_len; i < bytes; i += buf_len) { - /* create or determine next desc. */ - if (create_new_chain) { - - td = pci_pool_alloc(ep->dev->data_requests, - gfp_flags, &dma_addr); - if (!td) - return -ENOMEM; - - td->status = 0; - } else if (i == buf_len) { - /* first td */ - td = (struct udc_data_dma *) phys_to_virt( - req->td_data->next); - td->status = 0; - } else { - td = (struct udc_data_dma *) phys_to_virt(last->next); - td->status = 0; - } - - - if (td) - td->bufptr = req->req.dma + i; /* assign buffer */ - else - break; - - /* short packet ? */ - if ((bytes - i) >= buf_len) { - txbytes = buf_len; - } else { - /* short packet */ - txbytes = bytes - i; - } - - /* link td and assign tx bytes */ - if (i == buf_len) { - if (create_new_chain) - req->td_data->next = dma_addr; - /* - else - req->td_data->next = virt_to_phys(td); - */ - /* write tx bytes */ - if (ep->in) { - /* first desc */ - req->td_data->status = - AMD_ADDBITS(req->td_data->status, - ep->ep.maxpacket, - UDC_DMA_IN_STS_TXBYTES); - /* second desc */ - td->status = AMD_ADDBITS(td->status, - txbytes, - UDC_DMA_IN_STS_TXBYTES); - } - } else { - if (create_new_chain) - last->next = dma_addr; - /* - else - last->next = virt_to_phys(td); - */ - if (ep->in) { - /* write tx bytes */ - td->status = AMD_ADDBITS(td->status, - txbytes, - UDC_DMA_IN_STS_TXBYTES); - } - } - last = td; - } - /* set last bit */ - if (td) { - td->status |= AMD_BIT(UDC_DMA_IN_STS_L); - /* last desc. points to itself */ - req->td_data_last = td; - } - - return 0; -} - /* Enabling RX DMA */ static void udc_set_rde(struct udc *dev) { |