| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * Driver for PLX NET2272 USB device controller |
| * |
| * Copyright (C) 2005-2006 PLX Technology, Inc. |
| * Copyright (C) 2006-2011 Analog Devices, Inc. |
| */ |
| |
| #include <linux/delay.h> |
| #include <linux/device.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/ioport.h> |
| #include <linux/kernel.h> |
| #include <linux/list.h> |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/pci.h> |
| #include <linux/platform_device.h> |
| #include <linux/prefetch.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/timer.h> |
| #include <linux/usb.h> |
| #include <linux/usb/ch9.h> |
| #include <linux/usb/gadget.h> |
| |
| #include <asm/byteorder.h> |
| #include <asm/unaligned.h> |
| |
| #include "net2272.h" |
| |
| #define DRIVER_DESC "PLX NET2272 USB Peripheral Controller" |
| |
| static const char driver_name[] = "net2272"; |
| static const char driver_vers[] = "2006 October 17/mainline"; |
| static const char driver_desc[] = DRIVER_DESC; |
| |
| static const char ep0name[] = "ep0"; |
| static const char * const ep_name[] = { |
| ep0name, |
| "ep-a", "ep-b", "ep-c", |
| }; |
| |
| #ifdef CONFIG_USB_NET2272_DMA |
| /* |
| * use_dma: the NET2272 can use an external DMA controller. |
| * Note that since there is no generic DMA api, some functions, |
| * notably request_dma, start_dma, and cancel_dma will need to be |
| * modified for your platform's particular dma controller. |
| * |
| * If use_dma is disabled, pio will be used instead. |
| */ |
| static bool use_dma = false; |
| module_param(use_dma, bool, 0644); |
| |
| /* |
| * dma_ep: selects the endpoint for use with dma (1=ep-a, 2=ep-b) |
| * The NET2272 can only use dma for a single endpoint at a time. |
| * At some point this could be modified to allow either endpoint |
| * to take control of dma as it becomes available. |
| * |
| * Note that DMA should not be used on OUT endpoints unless it can |
| * be guaranteed that no short packets will arrive on an IN endpoint |
| * while the DMA operation is pending. Otherwise the OUT DMA will |
| * terminate prematurely (See NET2272 Errata 630-0213-0101) |
| */ |
| static ushort dma_ep = 1; |
| module_param(dma_ep, ushort, 0644); |
| |
| /* |
| * dma_mode: net2272 dma mode setting (see LOCCTL1 definition): |
| * mode 0 == Slow DREQ mode |
| * mode 1 == Fast DREQ mode |
| * mode 2 == Burst mode |
| */ |
| static ushort dma_mode = 2; |
| module_param(dma_mode, ushort, 0644); |
| #else |
| #define use_dma 0 |
| #define dma_ep 1 |
| #define dma_mode 2 |
| #endif |
| |
| /* |
| * fifo_mode: net2272 buffer configuration: |
| * mode 0 == ep-{a,b,c} 512db each |
| * mode 1 == ep-a 1k, ep-{b,c} 512db |
| * mode 2 == ep-a 1k, ep-b 1k, ep-c 512db |
| * mode 3 == ep-a 1k, ep-b disabled, ep-c 512db |
| */ |
| static ushort fifo_mode = 0; |
| module_param(fifo_mode, ushort, 0644); |
| |
| /* |
| * enable_suspend: When enabled, the driver will respond to |
| * USB suspend requests by powering down the NET2272. Otherwise, |
| * USB suspend requests will be ignored. This is acceptable for |
| * self-powered devices. For bus powered devices set this to 1. |
| */ |
| static ushort enable_suspend = 0; |
| module_param(enable_suspend, ushort, 0644); |
| |
| static void assert_out_naking(struct net2272_ep *ep, const char *where) |
| { |
| u8 tmp; |
| |
| #ifndef DEBUG |
| return; |
| #endif |
| |
| tmp = net2272_ep_read(ep, EP_STAT0); |
| if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { |
| dev_dbg(ep->dev->dev, "%s %s %02x !NAK\n", |
| ep->ep.name, where, tmp); |
| net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); |
| } |
| } |
| #define ASSERT_OUT_NAKING(ep) assert_out_naking(ep, __func__) |
| |
| static void stop_out_naking(struct net2272_ep *ep) |
| { |
| u8 tmp = net2272_ep_read(ep, EP_STAT0); |
| |
| if ((tmp & (1 << NAK_OUT_PACKETS)) != 0) |
| net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); |
| } |
| |
| #define PIPEDIR(bAddress) (usb_pipein(bAddress) ? "in" : "out") |
| |
| static char *type_string(u8 bmAttributes) |
| { |
| switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { |
| case USB_ENDPOINT_XFER_BULK: return "bulk"; |
| case USB_ENDPOINT_XFER_ISOC: return "iso"; |
| case USB_ENDPOINT_XFER_INT: return "intr"; |
| default: return "control"; |
| } |
| } |
| |
| static char *buf_state_string(unsigned state) |
| { |
| switch (state) { |
| case BUFF_FREE: return "free"; |
| case BUFF_VALID: return "valid"; |
| case BUFF_LCL: return "local"; |
| case BUFF_USB: return "usb"; |
| default: return "unknown"; |
| } |
| } |
| |
| static char *dma_mode_string(void) |
| { |
| if (!use_dma) |
| return "PIO"; |
| switch (dma_mode) { |
| case 0: return "SLOW DREQ"; |
| case 1: return "FAST DREQ"; |
| case 2: return "BURST"; |
| default: return "invalid"; |
| } |
| } |
| |
| static void net2272_dequeue_all(struct net2272_ep *); |
| static int net2272_kick_dma(struct net2272_ep *, struct net2272_request *); |
| static int net2272_fifo_status(struct usb_ep *); |
| |
| static const struct usb_ep_ops net2272_ep_ops; |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static int |
| net2272_enable(struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| { |
| struct net2272 *dev; |
| struct net2272_ep *ep; |
| u32 max; |
| u8 tmp; |
| unsigned long flags; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| || desc->bDescriptorType != USB_DT_ENDPOINT) |
| return -EINVAL; |
| dev = ep->dev; |
| if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| max = usb_endpoint_maxp(desc); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| _ep->maxpacket = max; |
| ep->desc = desc; |
| |
| /* net2272_ep_reset() has already been called */ |
| ep->stopped = 0; |
| ep->wedged = 0; |
| |
| /* set speed-dependent max packet */ |
| net2272_ep_write(ep, EP_MAXPKT0, max & 0xff); |
| net2272_ep_write(ep, EP_MAXPKT1, (max & 0xff00) >> 8); |
| |
| /* set type, direction, address; reset fifo counters */ |
| net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); |
| tmp = usb_endpoint_type(desc); |
| if (usb_endpoint_xfer_bulk(desc)) { |
| /* catch some particularly blatant driver bugs */ |
| if ((dev->gadget.speed == USB_SPEED_HIGH && max != 512) || |
| (dev->gadget.speed == USB_SPEED_FULL && max > 64)) { |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return -ERANGE; |
| } |
| } |
| ep->is_iso = usb_endpoint_xfer_isoc(desc) ? 1 : 0; |
| tmp <<= ENDPOINT_TYPE; |
| tmp |= ((desc->bEndpointAddress & 0x0f) << ENDPOINT_NUMBER); |
| tmp |= usb_endpoint_dir_in(desc) << ENDPOINT_DIRECTION; |
| tmp |= (1 << ENDPOINT_ENABLE); |
| |
| /* for OUT transfers, block the rx fifo until a read is posted */ |
| ep->is_in = usb_endpoint_dir_in(desc); |
| if (!ep->is_in) |
| net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); |
| |
| net2272_ep_write(ep, EP_CFG, tmp); |
| |
| /* enable irqs */ |
| tmp = (1 << ep->num) | net2272_read(dev, IRQENB0); |
| net2272_write(dev, IRQENB0, tmp); |
| |
| tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
| | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) |
| | net2272_ep_read(ep, EP_IRQENB); |
| net2272_ep_write(ep, EP_IRQENB, tmp); |
| |
| tmp = desc->bEndpointAddress; |
| dev_dbg(dev->dev, "enabled %s (ep%d%s-%s) max %04x cfg %02x\n", |
| _ep->name, tmp & 0x0f, PIPEDIR(tmp), |
| type_string(desc->bmAttributes), max, |
| net2272_ep_read(ep, EP_CFG)); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return 0; |
| } |
| |
| static void net2272_ep_reset(struct net2272_ep *ep) |
| { |
| u8 tmp; |
| |
| ep->desc = NULL; |
| INIT_LIST_HEAD(&ep->queue); |
| |
| usb_ep_set_maxpacket_limit(&ep->ep, ~0); |
| ep->ep.ops = &net2272_ep_ops; |
| |
| /* disable irqs, endpoint */ |
| net2272_ep_write(ep, EP_IRQENB, 0); |
| |
| /* init to our chosen defaults, notably so that we NAK OUT |
| * packets until the driver queues a read. |
| */ |
| tmp = (1 << NAK_OUT_PACKETS_MODE) | (1 << ALT_NAK_OUT_PACKETS); |
| net2272_ep_write(ep, EP_RSPSET, tmp); |
| |
| tmp = (1 << INTERRUPT_MODE) | (1 << HIDE_STATUS_PHASE); |
| if (ep->num != 0) |
| tmp |= (1 << ENDPOINT_TOGGLE) | (1 << ENDPOINT_HALT); |
| |
| net2272_ep_write(ep, EP_RSPCLR, tmp); |
| |
| /* scrub most status bits, and flush any fifo state */ |
| net2272_ep_write(ep, EP_STAT0, |
| (1 << DATA_IN_TOKEN_INTERRUPT) |
| | (1 << DATA_OUT_TOKEN_INTERRUPT) |
| | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
| | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); |
| |
| net2272_ep_write(ep, EP_STAT1, |
| (1 << TIMEOUT) |
| | (1 << USB_OUT_ACK_SENT) |
| | (1 << USB_OUT_NAK_SENT) |
| | (1 << USB_IN_ACK_RCVD) |
| | (1 << USB_IN_NAK_SENT) |
| | (1 << USB_STALL_SENT) |
| | (1 << LOCAL_OUT_ZLP) |
| | (1 << BUFFER_FLUSH)); |
| |
| /* fifo size is handled separately */ |
| } |
| |
| static int net2272_disable(struct usb_ep *_ep) |
| { |
| struct net2272_ep *ep; |
| unsigned long flags; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || !ep->desc || _ep->name == ep0name) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&ep->dev->lock, flags); |
| net2272_dequeue_all(ep); |
| net2272_ep_reset(ep); |
| |
| dev_vdbg(ep->dev->dev, "disabled %s\n", _ep->name); |
| |
| spin_unlock_irqrestore(&ep->dev->lock, flags); |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static struct usb_request * |
| net2272_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags) |
| { |
| struct net2272_request *req; |
| |
| if (!_ep) |
| return NULL; |
| |
| req = kzalloc(sizeof(*req), gfp_flags); |
| if (!req) |
| return NULL; |
| |
| INIT_LIST_HEAD(&req->queue); |
| |
| return &req->req; |
| } |
| |
| static void |
| net2272_free_request(struct usb_ep *_ep, struct usb_request *_req) |
| { |
| struct net2272_request *req; |
| |
| if (!_ep || !_req) |
| return; |
| |
| req = container_of(_req, struct net2272_request, req); |
| WARN_ON(!list_empty(&req->queue)); |
| kfree(req); |
| } |
| |
| static void |
| net2272_done(struct net2272_ep *ep, struct net2272_request *req, int status) |
| { |
| struct net2272 *dev; |
| unsigned stopped = ep->stopped; |
| |
| if (ep->num == 0) { |
| if (ep->dev->protocol_stall) { |
| ep->stopped = 1; |
| set_halt(ep); |
| } |
| allow_status(ep); |
| } |
| |
| list_del_init(&req->queue); |
| |
| if (req->req.status == -EINPROGRESS) |
| req->req.status = status; |
| else |
| status = req->req.status; |
| |
| dev = ep->dev; |
| if (use_dma && ep->dma) |
| usb_gadget_unmap_request(&dev->gadget, &req->req, |
| ep->is_in); |
| |
| if (status && status != -ESHUTDOWN) |
| dev_vdbg(dev->dev, "complete %s req %p stat %d len %u/%u buf %p\n", |
| ep->ep.name, &req->req, status, |
| req->req.actual, req->req.length, req->req.buf); |
| |
| /* don't modify queue heads during completion callback */ |
| ep->stopped = 1; |
| spin_unlock(&dev->lock); |
| usb_gadget_giveback_request(&ep->ep, &req->req); |
| spin_lock(&dev->lock); |
| ep->stopped = stopped; |
| } |
| |
| static int |
| net2272_write_packet(struct net2272_ep *ep, u8 *buf, |
| struct net2272_request *req, unsigned max) |
| { |
| u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); |
| u16 *bufp; |
| unsigned length, count; |
| u8 tmp; |
| |
| length = min(req->req.length - req->req.actual, max); |
| req->req.actual += length; |
| |
| dev_vdbg(ep->dev->dev, "write packet %s req %p max %u len %u avail %u\n", |
| ep->ep.name, req, max, length, |
| (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); |
| |
| count = length; |
| bufp = (u16 *)buf; |
| |
| while (likely(count >= 2)) { |
| /* no byte-swap required; chip endian set during init */ |
| writew(*bufp++, ep_data); |
| count -= 2; |
| } |
| buf = (u8 *)bufp; |
| |
| /* write final byte by placing the NET2272 into 8-bit mode */ |
| if (unlikely(count)) { |
| tmp = net2272_read(ep->dev, LOCCTL); |
| net2272_write(ep->dev, LOCCTL, tmp & ~(1 << DATA_WIDTH)); |
| writeb(*buf, ep_data); |
| net2272_write(ep->dev, LOCCTL, tmp); |
| } |
| return length; |
| } |
| |
| /* returns: 0: still running, 1: completed, negative: errno */ |
| static int |
| net2272_write_fifo(struct net2272_ep *ep, struct net2272_request *req) |
| { |
| u8 *buf; |
| unsigned count, max; |
| int status; |
| |
| dev_vdbg(ep->dev->dev, "write_fifo %s actual %d len %d\n", |
| ep->ep.name, req->req.actual, req->req.length); |
| |
| /* |
| * Keep loading the endpoint until the final packet is loaded, |
| * or the endpoint buffer is full. |
| */ |
| top: |
| /* |
| * Clear interrupt status |
| * - Packet Transmitted interrupt will become set again when the |
| * host successfully takes another packet |
| */ |
| net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); |
| while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_FULL))) { |
| buf = req->req.buf + req->req.actual; |
| prefetch(buf); |
| |
| /* force pagesel */ |
| net2272_ep_read(ep, EP_STAT0); |
| |
| max = (net2272_ep_read(ep, EP_AVAIL1) << 8) | |
| (net2272_ep_read(ep, EP_AVAIL0)); |
| |
| if (max < ep->ep.maxpacket) |
| max = (net2272_ep_read(ep, EP_AVAIL1) << 8) |
| | (net2272_ep_read(ep, EP_AVAIL0)); |
| |
| count = net2272_write_packet(ep, buf, req, max); |
| /* see if we are done */ |
| if (req->req.length == req->req.actual) { |
| /* validate short or zlp packet */ |
| if (count < ep->ep.maxpacket) |
| set_fifo_bytecount(ep, 0); |
| net2272_done(ep, req, 0); |
| |
| if (!list_empty(&ep->queue)) { |
| req = list_entry(ep->queue.next, |
| struct net2272_request, |
| queue); |
| status = net2272_kick_dma(ep, req); |
| |
| if (status < 0) |
| if ((net2272_ep_read(ep, EP_STAT0) |
| & (1 << BUFFER_EMPTY))) |
| goto top; |
| } |
| return 1; |
| } |
| net2272_ep_write(ep, EP_STAT0, (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)); |
| } |
| return 0; |
| } |
| |
| static void |
| net2272_out_flush(struct net2272_ep *ep) |
| { |
| ASSERT_OUT_NAKING(ep); |
| |
| net2272_ep_write(ep, EP_STAT0, (1 << DATA_OUT_TOKEN_INTERRUPT) |
| | (1 << DATA_PACKET_RECEIVED_INTERRUPT)); |
| net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); |
| } |
| |
| static int |
| net2272_read_packet(struct net2272_ep *ep, u8 *buf, |
| struct net2272_request *req, unsigned avail) |
| { |
| u16 __iomem *ep_data = net2272_reg_addr(ep->dev, EP_DATA); |
| unsigned is_short; |
| u16 *bufp; |
| |
| req->req.actual += avail; |
| |
| dev_vdbg(ep->dev->dev, "read packet %s req %p len %u avail %u\n", |
| ep->ep.name, req, avail, |
| (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0)); |
| |
| is_short = (avail < ep->ep.maxpacket); |
| |
| if (unlikely(avail == 0)) { |
| /* remove any zlp from the buffer */ |
| (void)readw(ep_data); |
| return is_short; |
| } |
| |
| /* Ensure we get the final byte */ |
| if (unlikely(avail % 2)) |
| avail++; |
| bufp = (u16 *)buf; |
| |
| do { |
| *bufp++ = readw(ep_data); |
| avail -= 2; |
| } while (avail); |
| |
| /* |
| * To avoid false endpoint available race condition must read |
| * ep stat0 twice in the case of a short transfer |
| */ |
| if (net2272_ep_read(ep, EP_STAT0) & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) |
| net2272_ep_read(ep, EP_STAT0); |
| |
| return is_short; |
| } |
| |
| static int |
| net2272_read_fifo(struct net2272_ep *ep, struct net2272_request *req) |
| { |
| u8 *buf; |
| unsigned is_short; |
| int count; |
| int tmp; |
| int cleanup = 0; |
| |
| dev_vdbg(ep->dev->dev, "read_fifo %s actual %d len %d\n", |
| ep->ep.name, req->req.actual, req->req.length); |
| |
| top: |
| do { |
| buf = req->req.buf + req->req.actual; |
| prefetchw(buf); |
| |
| count = (net2272_ep_read(ep, EP_AVAIL1) << 8) |
| | net2272_ep_read(ep, EP_AVAIL0); |
| |
| net2272_ep_write(ep, EP_STAT0, |
| (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) | |
| (1 << DATA_PACKET_RECEIVED_INTERRUPT)); |
| |
| tmp = req->req.length - req->req.actual; |
| |
| if (count > tmp) { |
| if ((tmp % ep->ep.maxpacket) != 0) { |
| dev_err(ep->dev->dev, |
| "%s out fifo %d bytes, expected %d\n", |
| ep->ep.name, count, tmp); |
| cleanup = 1; |
| } |
| count = (tmp > 0) ? tmp : 0; |
| } |
| |
| is_short = net2272_read_packet(ep, buf, req, count); |
| |
| /* completion */ |
| if (unlikely(cleanup || is_short || |
| req->req.actual == req->req.length)) { |
| |
| if (cleanup) { |
| net2272_out_flush(ep); |
| net2272_done(ep, req, -EOVERFLOW); |
| } else |
| net2272_done(ep, req, 0); |
| |
| /* re-initialize endpoint transfer registers |
| * otherwise they may result in erroneous pre-validation |
| * for subsequent control reads |
| */ |
| if (unlikely(ep->num == 0)) { |
| net2272_ep_write(ep, EP_TRANSFER2, 0); |
| net2272_ep_write(ep, EP_TRANSFER1, 0); |
| net2272_ep_write(ep, EP_TRANSFER0, 0); |
| } |
| |
| if (!list_empty(&ep->queue)) { |
| int status; |
| |
| req = list_entry(ep->queue.next, |
| struct net2272_request, queue); |
| status = net2272_kick_dma(ep, req); |
| if ((status < 0) && |
| !(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))) |
| goto top; |
| } |
| return 1; |
| } |
| } while (!(net2272_ep_read(ep, EP_STAT0) & (1 << BUFFER_EMPTY))); |
| |
| return 0; |
| } |
| |
| static void |
| net2272_pio_advance(struct net2272_ep *ep) |
| { |
| struct net2272_request *req; |
| |
| if (unlikely(list_empty(&ep->queue))) |
| return; |
| |
| req = list_entry(ep->queue.next, struct net2272_request, queue); |
| (ep->is_in ? net2272_write_fifo : net2272_read_fifo)(ep, req); |
| } |
| |
| /* returns 0 on success, else negative errno */ |
| static int |
| net2272_request_dma(struct net2272 *dev, unsigned ep, u32 buf, |
| unsigned len, unsigned dir) |
| { |
| dev_vdbg(dev->dev, "request_dma ep %d buf %08x len %d dir %d\n", |
| ep, buf, len, dir); |
| |
| /* The NET2272 only supports a single dma channel */ |
| if (dev->dma_busy) |
| return -EBUSY; |
| /* |
| * EP_TRANSFER (used to determine the number of bytes received |
| * in an OUT transfer) is 24 bits wide; don't ask for more than that. |
| */ |
| if ((dir == 1) && (len > 0x1000000)) |
| return -EINVAL; |
| |
| dev->dma_busy = 1; |
| |
| /* initialize platform's dma */ |
| #ifdef CONFIG_USB_PCI |
| /* NET2272 addr, buffer addr, length, etc. */ |
| switch (dev->dev_id) { |
| case PCI_DEVICE_ID_RDK1: |
| /* Setup PLX 9054 DMA mode */ |
| writel((1 << LOCAL_BUS_WIDTH) | |
| (1 << TA_READY_INPUT_ENABLE) | |
| (0 << LOCAL_BURST_ENABLE) | |
| (1 << DONE_INTERRUPT_ENABLE) | |
| (1 << LOCAL_ADDRESSING_MODE) | |
| (1 << DEMAND_MODE) | |
| (1 << DMA_EOT_ENABLE) | |
| (1 << FAST_SLOW_TERMINATE_MODE_SELECT) | |
| (1 << DMA_CHANNEL_INTERRUPT_SELECT), |
| dev->rdk1.plx9054_base_addr + DMAMODE0); |
| |
| writel(0x100000, dev->rdk1.plx9054_base_addr + DMALADR0); |
| writel(buf, dev->rdk1.plx9054_base_addr + DMAPADR0); |
| writel(len, dev->rdk1.plx9054_base_addr + DMASIZ0); |
| writel((dir << DIRECTION_OF_TRANSFER) | |
| (1 << INTERRUPT_AFTER_TERMINAL_COUNT), |
| dev->rdk1.plx9054_base_addr + DMADPR0); |
| writel((1 << LOCAL_DMA_CHANNEL_0_INTERRUPT_ENABLE) | |
| readl(dev->rdk1.plx9054_base_addr + INTCSR), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| |
| break; |
| } |
| #endif |
| |
| net2272_write(dev, DMAREQ, |
| (0 << DMA_BUFFER_VALID) | |
| (1 << DMA_REQUEST_ENABLE) | |
| (1 << DMA_CONTROL_DACK) | |
| (dev->dma_eot_polarity << EOT_POLARITY) | |
| (dev->dma_dack_polarity << DACK_POLARITY) | |
| (dev->dma_dreq_polarity << DREQ_POLARITY) | |
| ((ep >> 1) << DMA_ENDPOINT_SELECT)); |
| |
| (void) net2272_read(dev, SCRATCH); |
| |
| return 0; |
| } |
| |
| static void |
| net2272_start_dma(struct net2272 *dev) |
| { |
| /* start platform's dma controller */ |
| #ifdef CONFIG_USB_PCI |
| switch (dev->dev_id) { |
| case PCI_DEVICE_ID_RDK1: |
| writeb((1 << CHANNEL_ENABLE) | (1 << CHANNEL_START), |
| dev->rdk1.plx9054_base_addr + DMACSR0); |
| break; |
| } |
| #endif |
| } |
| |
| /* returns 0 on success, else negative errno */ |
| static int |
| net2272_kick_dma(struct net2272_ep *ep, struct net2272_request *req) |
| { |
| unsigned size; |
| u8 tmp; |
| |
| if (!use_dma || (ep->num < 1) || (ep->num > 2) || !ep->dma) |
| return -EINVAL; |
| |
| /* don't use dma for odd-length transfers |
| * otherwise, we'd need to deal with the last byte with pio |
| */ |
| if (req->req.length & 1) |
| return -EINVAL; |
| |
| dev_vdbg(ep->dev->dev, "kick_dma %s req %p dma %08llx\n", |
| ep->ep.name, req, (unsigned long long) req->req.dma); |
| |
| net2272_ep_write(ep, EP_RSPSET, 1 << ALT_NAK_OUT_PACKETS); |
| |
| /* The NET2272 can only use DMA on one endpoint at a time */ |
| if (ep->dev->dma_busy) |
| return -EBUSY; |
| |
| /* Make sure we only DMA an even number of bytes (we'll use |
| * pio to complete the transfer) |
| */ |
| size = req->req.length; |
| size &= ~1; |
| |
| /* device-to-host transfer */ |
| if (ep->is_in) { |
| /* initialize platform's dma controller */ |
| if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 0)) |
| /* unable to obtain DMA channel; return error and use pio mode */ |
| return -EBUSY; |
| req->req.actual += size; |
| |
| /* host-to-device transfer */ |
| } else { |
| tmp = net2272_ep_read(ep, EP_STAT0); |
| |
| /* initialize platform's dma controller */ |
| if (net2272_request_dma(ep->dev, ep->num, req->req.dma, size, 1)) |
| /* unable to obtain DMA channel; return error and use pio mode */ |
| return -EBUSY; |
| |
| if (!(tmp & (1 << BUFFER_EMPTY))) |
| ep->not_empty = 1; |
| else |
| ep->not_empty = 0; |
| |
| |
| /* allow the endpoint's buffer to fill */ |
| net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); |
| |
| /* this transfer completed and data's already in the fifo |
| * return error so pio gets used. |
| */ |
| if (tmp & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { |
| |
| /* deassert dreq */ |
| net2272_write(ep->dev, DMAREQ, |
| (0 << DMA_BUFFER_VALID) | |
| (0 << DMA_REQUEST_ENABLE) | |
| (1 << DMA_CONTROL_DACK) | |
| (ep->dev->dma_eot_polarity << EOT_POLARITY) | |
| (ep->dev->dma_dack_polarity << DACK_POLARITY) | |
| (ep->dev->dma_dreq_polarity << DREQ_POLARITY) | |
| ((ep->num >> 1) << DMA_ENDPOINT_SELECT)); |
| |
| return -EBUSY; |
| } |
| } |
| |
| /* Don't use per-packet interrupts: use dma interrupts only */ |
| net2272_ep_write(ep, EP_IRQENB, 0); |
| |
| net2272_start_dma(ep->dev); |
| |
| return 0; |
| } |
| |
| static void net2272_cancel_dma(struct net2272 *dev) |
| { |
| #ifdef CONFIG_USB_PCI |
| switch (dev->dev_id) { |
| case PCI_DEVICE_ID_RDK1: |
| writeb(0, dev->rdk1.plx9054_base_addr + DMACSR0); |
| writeb(1 << CHANNEL_ABORT, dev->rdk1.plx9054_base_addr + DMACSR0); |
| while (!(readb(dev->rdk1.plx9054_base_addr + DMACSR0) & |
| (1 << CHANNEL_DONE))) |
| continue; /* wait for dma to stabalize */ |
| |
| /* dma abort generates an interrupt */ |
| writeb(1 << CHANNEL_CLEAR_INTERRUPT, |
| dev->rdk1.plx9054_base_addr + DMACSR0); |
| break; |
| } |
| #endif |
| |
| dev->dma_busy = 0; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static int |
| net2272_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
| { |
| struct net2272_request *req; |
| struct net2272_ep *ep; |
| struct net2272 *dev; |
| unsigned long flags; |
| int status = -1; |
| u8 s; |
| |
| req = container_of(_req, struct net2272_request, req); |
| if (!_req || !_req->complete || !_req->buf |
| || !list_empty(&req->queue)) |
| return -EINVAL; |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || (!ep->desc && ep->num != 0)) |
| return -EINVAL; |
| dev = ep->dev; |
| if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| /* set up dma mapping in case the caller didn't */ |
| if (use_dma && ep->dma) { |
| status = usb_gadget_map_request(&dev->gadget, _req, |
| ep->is_in); |
| if (status) |
| return status; |
| } |
| |
| dev_vdbg(dev->dev, "%s queue req %p, len %d buf %p dma %08llx %s\n", |
| _ep->name, _req, _req->length, _req->buf, |
| (unsigned long long) _req->dma, _req->zero ? "zero" : "!zero"); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| _req->status = -EINPROGRESS; |
| _req->actual = 0; |
| |
| /* kickstart this i/o queue? */ |
| if (list_empty(&ep->queue) && !ep->stopped) { |
| /* maybe there's no control data, just status ack */ |
| if (ep->num == 0 && _req->length == 0) { |
| net2272_done(ep, req, 0); |
| dev_vdbg(dev->dev, "%s status ack\n", ep->ep.name); |
| goto done; |
| } |
| |
| /* Return zlp, don't let it block subsequent packets */ |
| s = net2272_ep_read(ep, EP_STAT0); |
| if (s & (1 << BUFFER_EMPTY)) { |
| /* Buffer is empty check for a blocking zlp, handle it */ |
| if ((s & (1 << NAK_OUT_PACKETS)) && |
| net2272_ep_read(ep, EP_STAT1) & (1 << LOCAL_OUT_ZLP)) { |
| dev_dbg(dev->dev, "WARNING: returning ZLP short packet termination!\n"); |
| /* |
| * Request is going to terminate with a short packet ... |
| * hope the client is ready for it! |
| */ |
| status = net2272_read_fifo(ep, req); |
| /* clear short packet naking */ |
| net2272_ep_write(ep, EP_STAT0, (1 << NAK_OUT_PACKETS)); |
| goto done; |
| } |
| } |
| |
| /* try dma first */ |
| status = net2272_kick_dma(ep, req); |
| |
| if (status < 0) { |
| /* dma failed (most likely in use by another endpoint) |
| * fallback to pio |
| */ |
| status = 0; |
| |
| if (ep->is_in) |
| status = net2272_write_fifo(ep, req); |
| else { |
| s = net2272_ep_read(ep, EP_STAT0); |
| if ((s & (1 << BUFFER_EMPTY)) == 0) |
| status = net2272_read_fifo(ep, req); |
| } |
| |
| if (unlikely(status != 0)) { |
| if (status > 0) |
| status = 0; |
| req = NULL; |
| } |
| } |
| } |
| if (likely(req)) |
| list_add_tail(&req->queue, &ep->queue); |
| |
| if (likely(!list_empty(&ep->queue))) |
| net2272_ep_write(ep, EP_RSPCLR, 1 << ALT_NAK_OUT_PACKETS); |
| done: |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| /* dequeue ALL requests */ |
| static void |
| net2272_dequeue_all(struct net2272_ep *ep) |
| { |
| struct net2272_request *req; |
| |
| /* called with spinlock held */ |
| ep->stopped = 1; |
| |
| while (!list_empty(&ep->queue)) { |
| req = list_entry(ep->queue.next, |
| struct net2272_request, |
| queue); |
| net2272_done(ep, req, -ESHUTDOWN); |
| } |
| } |
| |
| /* dequeue JUST ONE request */ |
| static int |
| net2272_dequeue(struct usb_ep *_ep, struct usb_request *_req) |
| { |
| struct net2272_ep *ep; |
| struct net2272_request *req = NULL, *iter; |
| unsigned long flags; |
| int stopped; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || (!ep->desc && ep->num != 0) || !_req) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&ep->dev->lock, flags); |
| stopped = ep->stopped; |
| ep->stopped = 1; |
| |
| /* make sure it's still queued on this endpoint */ |
| list_for_each_entry(iter, &ep->queue, queue) { |
| if (&iter->req != _req) |
| continue; |
| req = iter; |
| break; |
| } |
| if (!req) { |
| ep->stopped = stopped; |
| spin_unlock_irqrestore(&ep->dev->lock, flags); |
| return -EINVAL; |
| } |
| |
| /* queue head may be partially complete */ |
| if (ep->queue.next == &req->queue) { |
| dev_dbg(ep->dev->dev, "unlink (%s) pio\n", _ep->name); |
| net2272_done(ep, req, -ECONNRESET); |
| } |
| ep->stopped = stopped; |
| |
| spin_unlock_irqrestore(&ep->dev->lock, flags); |
| return 0; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static int |
| net2272_set_halt_and_wedge(struct usb_ep *_ep, int value, int wedged) |
| { |
| struct net2272_ep *ep; |
| unsigned long flags; |
| int ret = 0; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || (!ep->desc && ep->num != 0)) |
| return -EINVAL; |
| if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| if (ep->desc /* not ep0 */ && usb_endpoint_xfer_isoc(ep->desc)) |
| return -EINVAL; |
| |
| spin_lock_irqsave(&ep->dev->lock, flags); |
| if (!list_empty(&ep->queue)) |
| ret = -EAGAIN; |
| else if (ep->is_in && value && net2272_fifo_status(_ep) != 0) |
| ret = -EAGAIN; |
| else { |
| dev_vdbg(ep->dev->dev, "%s %s %s\n", _ep->name, |
| value ? "set" : "clear", |
| wedged ? "wedge" : "halt"); |
| /* set/clear */ |
| if (value) { |
| if (ep->num == 0) |
| ep->dev->protocol_stall = 1; |
| else |
| set_halt(ep); |
| if (wedged) |
| ep->wedged = 1; |
| } else { |
| clear_halt(ep); |
| ep->wedged = 0; |
| } |
| } |
| spin_unlock_irqrestore(&ep->dev->lock, flags); |
| |
| return ret; |
| } |
| |
| static int |
| net2272_set_halt(struct usb_ep *_ep, int value) |
| { |
| return net2272_set_halt_and_wedge(_ep, value, 0); |
| } |
| |
| static int |
| net2272_set_wedge(struct usb_ep *_ep) |
| { |
| if (!_ep || _ep->name == ep0name) |
| return -EINVAL; |
| return net2272_set_halt_and_wedge(_ep, 1, 1); |
| } |
| |
| static int |
| net2272_fifo_status(struct usb_ep *_ep) |
| { |
| struct net2272_ep *ep; |
| u16 avail; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || (!ep->desc && ep->num != 0)) |
| return -ENODEV; |
| if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return -ESHUTDOWN; |
| |
| avail = net2272_ep_read(ep, EP_AVAIL1) << 8; |
| avail |= net2272_ep_read(ep, EP_AVAIL0); |
| if (avail > ep->fifo_size) |
| return -EOVERFLOW; |
| if (ep->is_in) |
| avail = ep->fifo_size - avail; |
| return avail; |
| } |
| |
| static void |
| net2272_fifo_flush(struct usb_ep *_ep) |
| { |
| struct net2272_ep *ep; |
| |
| ep = container_of(_ep, struct net2272_ep, ep); |
| if (!_ep || (!ep->desc && ep->num != 0)) |
| return; |
| if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| return; |
| |
| net2272_ep_write(ep, EP_STAT1, 1 << BUFFER_FLUSH); |
| } |
| |
| static const struct usb_ep_ops net2272_ep_ops = { |
| .enable = net2272_enable, |
| .disable = net2272_disable, |
| |
| .alloc_request = net2272_alloc_request, |
| .free_request = net2272_free_request, |
| |
| .queue = net2272_queue, |
| .dequeue = net2272_dequeue, |
| |
| .set_halt = net2272_set_halt, |
| .set_wedge = net2272_set_wedge, |
| .fifo_status = net2272_fifo_status, |
| .fifo_flush = net2272_fifo_flush, |
| }; |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static int |
| net2272_get_frame(struct usb_gadget *_gadget) |
| { |
| struct net2272 *dev; |
| unsigned long flags; |
| u16 ret; |
| |
| if (!_gadget) |
| return -ENODEV; |
| dev = container_of(_gadget, struct net2272, gadget); |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| ret = net2272_read(dev, FRAME1) << 8; |
| ret |= net2272_read(dev, FRAME0); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return ret; |
| } |
| |
| static int |
| net2272_wakeup(struct usb_gadget *_gadget) |
| { |
| struct net2272 *dev; |
| u8 tmp; |
| unsigned long flags; |
| |
| if (!_gadget) |
| return 0; |
| dev = container_of(_gadget, struct net2272, gadget); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| tmp = net2272_read(dev, USBCTL0); |
| if (tmp & (1 << IO_WAKEUP_ENABLE)) |
| net2272_write(dev, USBCTL1, (1 << GENERATE_RESUME)); |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| static int |
| net2272_set_selfpowered(struct usb_gadget *_gadget, int value) |
| { |
| if (!_gadget) |
| return -ENODEV; |
| |
| _gadget->is_selfpowered = (value != 0); |
| |
| return 0; |
| } |
| |
| static int |
| net2272_pullup(struct usb_gadget *_gadget, int is_on) |
| { |
| struct net2272 *dev; |
| u8 tmp; |
| unsigned long flags; |
| |
| if (!_gadget) |
| return -ENODEV; |
| dev = container_of(_gadget, struct net2272, gadget); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| tmp = net2272_read(dev, USBCTL0); |
| dev->softconnect = (is_on != 0); |
| if (is_on) |
| tmp |= (1 << USB_DETECT_ENABLE); |
| else |
| tmp &= ~(1 << USB_DETECT_ENABLE); |
| net2272_write(dev, USBCTL0, tmp); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return 0; |
| } |
| |
| static int net2272_start(struct usb_gadget *_gadget, |
| struct usb_gadget_driver *driver); |
| static int net2272_stop(struct usb_gadget *_gadget); |
| static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable); |
| |
| static const struct usb_gadget_ops net2272_ops = { |
| .get_frame = net2272_get_frame, |
| .wakeup = net2272_wakeup, |
| .set_selfpowered = net2272_set_selfpowered, |
| .pullup = net2272_pullup, |
| .udc_start = net2272_start, |
| .udc_stop = net2272_stop, |
| .udc_async_callbacks = net2272_async_callbacks, |
| }; |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static ssize_t |
| registers_show(struct device *_dev, struct device_attribute *attr, char *buf) |
| { |
| struct net2272 *dev; |
| char *next; |
| unsigned size, t; |
| unsigned long flags; |
| u8 t1, t2; |
| int i; |
| const char *s; |
| |
| dev = dev_get_drvdata(_dev); |
| next = buf; |
| size = PAGE_SIZE; |
| spin_lock_irqsave(&dev->lock, flags); |
| |
| /* Main Control Registers */ |
| t = scnprintf(next, size, "%s version %s," |
| "chiprev %02x, locctl %02x\n" |
| "irqenb0 %02x irqenb1 %02x " |
| "irqstat0 %02x irqstat1 %02x\n", |
| driver_name, driver_vers, dev->chiprev, |
| net2272_read(dev, LOCCTL), |
| net2272_read(dev, IRQENB0), |
| net2272_read(dev, IRQENB1), |
| net2272_read(dev, IRQSTAT0), |
| net2272_read(dev, IRQSTAT1)); |
| size -= t; |
| next += t; |
| |
| /* DMA */ |
| t1 = net2272_read(dev, DMAREQ); |
| t = scnprintf(next, size, "\ndmareq %02x: %s %s%s%s%s\n", |
| t1, ep_name[(t1 & 0x01) + 1], |
| t1 & (1 << DMA_CONTROL_DACK) ? "dack " : "", |
| t1 & (1 << DMA_REQUEST_ENABLE) ? "reqenb " : "", |
| t1 & (1 << DMA_REQUEST) ? "req " : "", |
| t1 & (1 << DMA_BUFFER_VALID) ? "valid " : ""); |
| size -= t; |
| next += t; |
| |
| /* USB Control Registers */ |
| t1 = net2272_read(dev, USBCTL1); |
| if (t1 & (1 << VBUS_PIN)) { |
| if (t1 & (1 << USB_HIGH_SPEED)) |
| s = "high speed"; |
| else if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| s = "powered"; |
| else |
| s = "full speed"; |
| } else |
| s = "not attached"; |
| t = scnprintf(next, size, |
| "usbctl0 %02x usbctl1 %02x addr 0x%02x (%s)\n", |
| net2272_read(dev, USBCTL0), t1, |
| net2272_read(dev, OURADDR), s); |
| size -= t; |
| next += t; |
| |
| /* Endpoint Registers */ |
| for (i = 0; i < 4; ++i) { |
| struct net2272_ep *ep; |
| |
| ep = &dev->ep[i]; |
| if (i && !ep->desc) |
| continue; |
| |
| t1 = net2272_ep_read(ep, EP_CFG); |
| t2 = net2272_ep_read(ep, EP_RSPSET); |
| t = scnprintf(next, size, |
| "\n%s\tcfg %02x rsp (%02x) %s%s%s%s%s%s%s%s" |
| "irqenb %02x\n", |
| ep->ep.name, t1, t2, |
| (t2 & (1 << ALT_NAK_OUT_PACKETS)) ? "NAK " : "", |
| (t2 & (1 << HIDE_STATUS_PHASE)) ? "hide " : "", |
| (t2 & (1 << AUTOVALIDATE)) ? "auto " : "", |
| (t2 & (1 << INTERRUPT_MODE)) ? "interrupt " : "", |
| (t2 & (1 << CONTROL_STATUS_PHASE_HANDSHAKE)) ? "status " : "", |
| (t2 & (1 << NAK_OUT_PACKETS_MODE)) ? "NAKmode " : "", |
| (t2 & (1 << ENDPOINT_TOGGLE)) ? "DATA1 " : "DATA0 ", |
| (t2 & (1 << ENDPOINT_HALT)) ? "HALT " : "", |
| net2272_ep_read(ep, EP_IRQENB)); |
| size -= t; |
| next += t; |
| |
| t = scnprintf(next, size, |
| "\tstat0 %02x stat1 %02x avail %04x " |
| "(ep%d%s-%s)%s\n", |
| net2272_ep_read(ep, EP_STAT0), |
| net2272_ep_read(ep, EP_STAT1), |
| (net2272_ep_read(ep, EP_AVAIL1) << 8) | net2272_ep_read(ep, EP_AVAIL0), |
| t1 & 0x0f, |
| ep->is_in ? "in" : "out", |
| type_string(t1 >> 5), |
| ep->stopped ? "*" : ""); |
| size -= t; |
| next += t; |
| |
| t = scnprintf(next, size, |
| "\tep_transfer %06x\n", |
| ((net2272_ep_read(ep, EP_TRANSFER2) & 0xff) << 16) | |
| ((net2272_ep_read(ep, EP_TRANSFER1) & 0xff) << 8) | |
| ((net2272_ep_read(ep, EP_TRANSFER0) & 0xff))); |
| size -= t; |
| next += t; |
| |
| t1 = net2272_ep_read(ep, EP_BUFF_STATES) & 0x03; |
| t2 = (net2272_ep_read(ep, EP_BUFF_STATES) >> 2) & 0x03; |
| t = scnprintf(next, size, |
| "\tbuf-a %s buf-b %s\n", |
| buf_state_string(t1), |
| buf_state_string(t2)); |
| size -= t; |
| next += t; |
| } |
| |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| return PAGE_SIZE - size; |
| } |
| static DEVICE_ATTR_RO(registers); |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static void |
| net2272_set_fifo_mode(struct net2272 *dev, int mode) |
| { |
| u8 tmp; |
| |
| tmp = net2272_read(dev, LOCCTL) & 0x3f; |
| tmp |= (mode << 6); |
| net2272_write(dev, LOCCTL, tmp); |
| |
| INIT_LIST_HEAD(&dev->gadget.ep_list); |
| |
| /* always ep-a, ep-c ... maybe not ep-b */ |
| list_add_tail(&dev->ep[1].ep.ep_list, &dev->gadget.ep_list); |
| |
| switch (mode) { |
| case 0: |
| list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); |
| dev->ep[1].fifo_size = dev->ep[2].fifo_size = 512; |
| break; |
| case 1: |
| list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); |
| dev->ep[1].fifo_size = 1024; |
| dev->ep[2].fifo_size = 512; |
| break; |
| case 2: |
| list_add_tail(&dev->ep[2].ep.ep_list, &dev->gadget.ep_list); |
| dev->ep[1].fifo_size = dev->ep[2].fifo_size = 1024; |
| break; |
| case 3: |
| dev->ep[1].fifo_size = 1024; |
| break; |
| } |
| |
| /* ep-c is always 2 512 byte buffers */ |
| list_add_tail(&dev->ep[3].ep.ep_list, &dev->gadget.ep_list); |
| dev->ep[3].fifo_size = 512; |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static void |
| net2272_usb_reset(struct net2272 *dev) |
| { |
| dev->gadget.speed = USB_SPEED_UNKNOWN; |
| |
| net2272_cancel_dma(dev); |
| |
| net2272_write(dev, IRQENB0, 0); |
| net2272_write(dev, IRQENB1, 0); |
| |
| /* clear irq state */ |
| net2272_write(dev, IRQSTAT0, 0xff); |
| net2272_write(dev, IRQSTAT1, ~(1 << SUSPEND_REQUEST_INTERRUPT)); |
| |
| net2272_write(dev, DMAREQ, |
| (0 << DMA_BUFFER_VALID) | |
| (0 << DMA_REQUEST_ENABLE) | |
| (1 << DMA_CONTROL_DACK) | |
| (dev->dma_eot_polarity << EOT_POLARITY) | |
| (dev->dma_dack_polarity << DACK_POLARITY) | |
| (dev->dma_dreq_polarity << DREQ_POLARITY) | |
| ((dma_ep >> 1) << DMA_ENDPOINT_SELECT)); |
| |
| net2272_cancel_dma(dev); |
| net2272_set_fifo_mode(dev, (fifo_mode <= 3) ? fifo_mode : 0); |
| |
| /* Set the NET2272 ep fifo data width to 16-bit mode and for correct byte swapping |
| * note that the higher level gadget drivers are expected to convert data to little endian. |
| * Enable byte swap for your local bus/cpu if needed by setting BYTE_SWAP in LOCCTL here |
| */ |
| net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) | (1 << DATA_WIDTH)); |
| net2272_write(dev, LOCCTL1, (dma_mode << DMA_MODE)); |
| } |
| |
| static void |
| net2272_usb_reinit(struct net2272 *dev) |
| { |
| int i; |
| |
| /* basic endpoint init */ |
| for (i = 0; i < 4; ++i) { |
| struct net2272_ep *ep = &dev->ep[i]; |
| |
| ep->ep.name = ep_name[i]; |
| ep->dev = dev; |
| ep->num = i; |
| ep->not_empty = 0; |
| |
| if (use_dma && ep->num == dma_ep) |
| ep->dma = 1; |
| |
| if (i > 0 && i <= 3) |
| ep->fifo_size = 512; |
| else |
| ep->fifo_size = 64; |
| net2272_ep_reset(ep); |
| |
| if (i == 0) { |
| ep->ep.caps.type_control = true; |
| } else { |
| ep->ep.caps.type_iso = true; |
| ep->ep.caps.type_bulk = true; |
| ep->ep.caps.type_int = true; |
| } |
| |
| ep->ep.caps.dir_in = true; |
| ep->ep.caps.dir_out = true; |
| } |
| usb_ep_set_maxpacket_limit(&dev->ep[0].ep, 64); |
| |
| dev->gadget.ep0 = &dev->ep[0].ep; |
| dev->ep[0].stopped = 0; |
| INIT_LIST_HEAD(&dev->gadget.ep0->ep_list); |
| } |
| |
| static void |
| net2272_ep0_start(struct net2272 *dev) |
| { |
| struct net2272_ep *ep0 = &dev->ep[0]; |
| |
| net2272_ep_write(ep0, EP_RSPSET, |
| (1 << NAK_OUT_PACKETS_MODE) | |
| (1 << ALT_NAK_OUT_PACKETS)); |
| net2272_ep_write(ep0, EP_RSPCLR, |
| (1 << HIDE_STATUS_PHASE) | |
| (1 << CONTROL_STATUS_PHASE_HANDSHAKE)); |
| net2272_write(dev, USBCTL0, |
| (dev->softconnect << USB_DETECT_ENABLE) | |
| (1 << USB_ROOT_PORT_WAKEUP_ENABLE) | |
| (1 << IO_WAKEUP_ENABLE)); |
| net2272_write(dev, IRQENB0, |
| (1 << SETUP_PACKET_INTERRUPT_ENABLE) | |
| (1 << ENDPOINT_0_INTERRUPT_ENABLE) | |
| (1 << DMA_DONE_INTERRUPT_ENABLE)); |
| net2272_write(dev, IRQENB1, |
| (1 << VBUS_INTERRUPT_ENABLE) | |
| (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) | |
| (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE)); |
| } |
| |
| /* when a driver is successfully registered, it will receive |
| * control requests including set_configuration(), which enables |
| * non-control requests. then usb traffic follows until a |
| * disconnect is reported. then a host may connect again, or |
| * the driver might get unbound. |
| */ |
| static int net2272_start(struct usb_gadget *_gadget, |
| struct usb_gadget_driver *driver) |
| { |
| struct net2272 *dev; |
| unsigned i; |
| |
| if (!driver || !driver->setup || |
| driver->max_speed != USB_SPEED_HIGH) |
| return -EINVAL; |
| |
| dev = container_of(_gadget, struct net2272, gadget); |
| |
| for (i = 0; i < 4; ++i) |
| dev->ep[i].irqs = 0; |
| /* hook up the driver ... */ |
| dev->softconnect = 1; |
| driver->driver.bus = NULL; |
| dev->driver = driver; |
| |
| /* ... then enable host detection and ep0; and we're ready |
| * for set_configuration as well as eventual disconnect. |
| */ |
| net2272_ep0_start(dev); |
| |
| return 0; |
| } |
| |
| static void |
| stop_activity(struct net2272 *dev, struct usb_gadget_driver *driver) |
| { |
| int i; |
| |
| /* don't disconnect if it's not connected */ |
| if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| driver = NULL; |
| |
| /* stop hardware; prevent new request submissions; |
| * and kill any outstanding requests. |
| */ |
| net2272_usb_reset(dev); |
| for (i = 0; i < 4; ++i) |
| net2272_dequeue_all(&dev->ep[i]); |
| |
| /* report disconnect; the driver is already quiesced */ |
| if (dev->async_callbacks && driver) { |
| spin_unlock(&dev->lock); |
| driver->disconnect(&dev->gadget); |
| spin_lock(&dev->lock); |
| } |
| |
| net2272_usb_reinit(dev); |
| } |
| |
| static int net2272_stop(struct usb_gadget *_gadget) |
| { |
| struct net2272 *dev; |
| unsigned long flags; |
| |
| dev = container_of(_gadget, struct net2272, gadget); |
| |
| spin_lock_irqsave(&dev->lock, flags); |
| stop_activity(dev, NULL); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| |
| dev->driver = NULL; |
| |
| return 0; |
| } |
| |
| static void net2272_async_callbacks(struct usb_gadget *_gadget, bool enable) |
| { |
| struct net2272 *dev = container_of(_gadget, struct net2272, gadget); |
| |
| spin_lock_irq(&dev->lock); |
| dev->async_callbacks = enable; |
| spin_unlock_irq(&dev->lock); |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| /* handle ep-a/ep-b dma completions */ |
| static void |
| net2272_handle_dma(struct net2272_ep *ep) |
| { |
| struct net2272_request *req; |
| unsigned len; |
| int status; |
| |
| if (!list_empty(&ep->queue)) |
| req = list_entry(ep->queue.next, |
| struct net2272_request, queue); |
| else |
| req = NULL; |
| |
| dev_vdbg(ep->dev->dev, "handle_dma %s req %p\n", ep->ep.name, req); |
| |
| /* Ensure DREQ is de-asserted */ |
| net2272_write(ep->dev, DMAREQ, |
| (0 << DMA_BUFFER_VALID) |
| | (0 << DMA_REQUEST_ENABLE) |
| | (1 << DMA_CONTROL_DACK) |
| | (ep->dev->dma_eot_polarity << EOT_POLARITY) |
| | (ep->dev->dma_dack_polarity << DACK_POLARITY) |
| | (ep->dev->dma_dreq_polarity << DREQ_POLARITY) |
| | (ep->dma << DMA_ENDPOINT_SELECT)); |
| |
| ep->dev->dma_busy = 0; |
| |
| net2272_ep_write(ep, EP_IRQENB, |
| (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
| | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) |
| | net2272_ep_read(ep, EP_IRQENB)); |
| |
| /* device-to-host transfer completed */ |
| if (ep->is_in) { |
| /* validate a short packet or zlp if necessary */ |
| if ((req->req.length % ep->ep.maxpacket != 0) || |
| req->req.zero) |
| set_fifo_bytecount(ep, 0); |
| |
| net2272_done(ep, req, 0); |
| if (!list_empty(&ep->queue)) { |
| req = list_entry(ep->queue.next, |
| struct net2272_request, queue); |
| status = net2272_kick_dma(ep, req); |
| if (status < 0) |
| net2272_pio_advance(ep); |
| } |
| |
| /* host-to-device transfer completed */ |
| } else { |
| /* terminated with a short packet? */ |
| if (net2272_read(ep->dev, IRQSTAT0) & |
| (1 << DMA_DONE_INTERRUPT)) { |
| /* abort system dma */ |
| net2272_cancel_dma(ep->dev); |
| } |
| |
| /* EP_TRANSFER will contain the number of bytes |
| * actually received. |
| * NOTE: There is no overflow detection on EP_TRANSFER: |
| * We can't deal with transfers larger than 2^24 bytes! |
| */ |
| len = (net2272_ep_read(ep, EP_TRANSFER2) << 16) |
| | (net2272_ep_read(ep, EP_TRANSFER1) << 8) |
| | (net2272_ep_read(ep, EP_TRANSFER0)); |
| |
| if (ep->not_empty) |
| len += 4; |
| |
| req->req.actual += len; |
| |
| /* get any remaining data */ |
| net2272_pio_advance(ep); |
| } |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static void |
| net2272_handle_ep(struct net2272_ep *ep) |
| { |
| struct net2272_request *req; |
| u8 stat0, stat1; |
| |
| if (!list_empty(&ep->queue)) |
| req = list_entry(ep->queue.next, |
| struct net2272_request, queue); |
| else |
| req = NULL; |
| |
| /* ack all, and handle what we care about */ |
| stat0 = net2272_ep_read(ep, EP_STAT0); |
| stat1 = net2272_ep_read(ep, EP_STAT1); |
| ep->irqs++; |
| |
| dev_vdbg(ep->dev->dev, "%s ack ep_stat0 %02x, ep_stat1 %02x, req %p\n", |
| ep->ep.name, stat0, stat1, req ? &req->req : NULL); |
| |
| net2272_ep_write(ep, EP_STAT0, stat0 & |
| ~((1 << NAK_OUT_PACKETS) |
| | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT))); |
| net2272_ep_write(ep, EP_STAT1, stat1); |
| |
| /* data packet(s) received (in the fifo, OUT) |
| * direction must be validated, otherwise control read status phase |
| * could be interpreted as a valid packet |
| */ |
| if (!ep->is_in && (stat0 & (1 << DATA_PACKET_RECEIVED_INTERRUPT))) |
| net2272_pio_advance(ep); |
| /* data packet(s) transmitted (IN) */ |
| else if (stat0 & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) |
| net2272_pio_advance(ep); |
| } |
| |
| static struct net2272_ep * |
| net2272_get_ep_by_addr(struct net2272 *dev, u16 wIndex) |
| { |
| struct net2272_ep *ep; |
| |
| if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) |
| return &dev->ep[0]; |
| |
| list_for_each_entry(ep, &dev->gadget.ep_list, ep.ep_list) { |
| u8 bEndpointAddress; |
| |
| if (!ep->desc) |
| continue; |
| bEndpointAddress = ep->desc->bEndpointAddress; |
| if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) |
| continue; |
| if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) |
| return ep; |
| } |
| return NULL; |
| } |
| |
| /* |
| * USB Test Packet: |
| * JKJKJKJK * 9 |
| * JJKKJJKK * 8 |
| * JJJJKKKK * 8 |
| * JJJJJJJKKKKKKK * 8 |
| * JJJJJJJK * 8 |
| * {JKKKKKKK * 10}, JK |
| */ |
| static const u8 net2272_test_packet[] = { |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
| 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, 0xAA, |
| 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, 0xEE, |
| 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, |
| 0x7F, 0xBF, 0xDF, 0xEF, 0xF7, 0xFB, 0xFD, |
| 0xFC, 0x7E, 0xBF, 0xDF, 0xEF, 0xF7, 0xFD, 0x7E |
| }; |
| |
| static void |
| net2272_set_test_mode(struct net2272 *dev, int mode) |
| { |
| int i; |
| |
| /* Disable all net2272 interrupts: |
| * Nothing but a power cycle should stop the test. |
| */ |
| net2272_write(dev, IRQENB0, 0x00); |
| net2272_write(dev, IRQENB1, 0x00); |
| |
| /* Force tranceiver to high-speed */ |
| net2272_write(dev, XCVRDIAG, 1 << FORCE_HIGH_SPEED); |
| |
| net2272_write(dev, PAGESEL, 0); |
| net2272_write(dev, EP_STAT0, 1 << DATA_PACKET_TRANSMITTED_INTERRUPT); |
| net2272_write(dev, EP_RSPCLR, |
| (1 << CONTROL_STATUS_PHASE_HANDSHAKE) |
| | (1 << HIDE_STATUS_PHASE)); |
| net2272_write(dev, EP_CFG, 1 << ENDPOINT_DIRECTION); |
| net2272_write(dev, EP_STAT1, 1 << BUFFER_FLUSH); |
| |
| /* wait for status phase to complete */ |
| while (!(net2272_read(dev, EP_STAT0) & |
| (1 << DATA_PACKET_TRANSMITTED_INTERRUPT))) |
| ; |
| |
| /* Enable test mode */ |
| net2272_write(dev, USBTEST, mode); |
| |
| /* load test packet */ |
| if (mode == USB_TEST_PACKET) { |
| /* switch to 8 bit mode */ |
| net2272_write(dev, LOCCTL, net2272_read(dev, LOCCTL) & |
| ~(1 << DATA_WIDTH)); |
| |
| for (i = 0; i < sizeof(net2272_test_packet); ++i) |
| net2272_write(dev, EP_DATA, net2272_test_packet[i]); |
| |
| /* Validate test packet */ |
| net2272_write(dev, EP_TRANSFER0, 0); |
| } |
| } |
| |
| static void |
| net2272_handle_stat0_irqs(struct net2272 *dev, u8 stat) |
| { |
| struct net2272_ep *ep; |
| u8 num, scratch; |
| |
| /* starting a control request? */ |
| if (unlikely(stat & (1 << SETUP_PACKET_INTERRUPT))) { |
| union { |
| u8 raw[8]; |
| struct usb_ctrlrequest r; |
| } u; |
| int tmp = 0; |
| struct net2272_request *req; |
| |
| if (dev->gadget.speed == USB_SPEED_UNKNOWN) { |
| if (net2272_read(dev, USBCTL1) & (1 << USB_HIGH_SPEED)) |
| dev->gadget.speed = USB_SPEED_HIGH; |
| else |
| dev->gadget.speed = USB_SPEED_FULL; |
| dev_dbg(dev->dev, "%s\n", |
| usb_speed_string(dev->gadget.speed)); |
| } |
| |
| ep = &dev->ep[0]; |
| ep->irqs++; |
| |
| /* make sure any leftover interrupt state is cleared */ |
| stat &= ~(1 << ENDPOINT_0_INTERRUPT); |
| while (!list_empty(&ep->queue)) { |
| req = list_entry(ep->queue.next, |
| struct net2272_request, queue); |
| net2272_done(ep, req, |
| (req->req.actual == req->req.length) ? 0 : -EPROTO); |
| } |
| ep->stopped = 0; |
| dev->protocol_stall = 0; |
| net2272_ep_write(ep, EP_STAT0, |
| (1 << DATA_IN_TOKEN_INTERRUPT) |
| | (1 << DATA_OUT_TOKEN_INTERRUPT) |
| | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
| | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)); |
| net2272_ep_write(ep, EP_STAT1, |
| (1 << TIMEOUT) |
| | (1 << USB_OUT_ACK_SENT) |
| | (1 << USB_OUT_NAK_SENT) |
| | (1 << USB_IN_ACK_RCVD) |
| | (1 << USB_IN_NAK_SENT) |
| | (1 << USB_STALL_SENT) |
| | (1 << LOCAL_OUT_ZLP)); |
| |
| /* |
| * Ensure Control Read pre-validation setting is beyond maximum size |
| * - Control Writes can leave non-zero values in EP_TRANSFER. If |
| * an EP0 transfer following the Control Write is a Control Read, |
| * the NET2272 sees the non-zero EP_TRANSFER as an unexpected |
| * pre-validation count. |
| * - Setting EP_TRANSFER beyond the maximum EP0 transfer size ensures |
| * the pre-validation count cannot cause an unexpected validatation |
| */ |
| net2272_write(dev, PAGESEL, 0); |
| net2272_write(dev, EP_TRANSFER2, 0xff); |
| net2272_write(dev, EP_TRANSFER1, 0xff); |
| net2272_write(dev, EP_TRANSFER0, 0xff); |
| |
| u.raw[0] = net2272_read(dev, SETUP0); |
| u.raw[1] = net2272_read(dev, SETUP1); |
| u.raw[2] = net2272_read(dev, SETUP2); |
| u.raw[3] = net2272_read(dev, SETUP3); |
| u.raw[4] = net2272_read(dev, SETUP4); |
| u.raw[5] = net2272_read(dev, SETUP5); |
| u.raw[6] = net2272_read(dev, SETUP6); |
| u.raw[7] = net2272_read(dev, SETUP7); |
| /* |
| * If you have a big endian cpu make sure le16_to_cpus |
| * performs the proper byte swapping here... |
| */ |
| le16_to_cpus(&u.r.wValue); |
| le16_to_cpus(&u.r.wIndex); |
| le16_to_cpus(&u.r.wLength); |
| |
| /* ack the irq */ |
| net2272_write(dev, IRQSTAT0, 1 << SETUP_PACKET_INTERRUPT); |
| stat ^= (1 << SETUP_PACKET_INTERRUPT); |
| |
| /* watch control traffic at the token level, and force |
| * synchronization before letting the status phase happen. |
| */ |
| ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; |
| if (ep->is_in) { |
| scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE) |
| | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) |
| | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); |
| stop_out_naking(ep); |
| } else |
| scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
| | (1 << DATA_OUT_TOKEN_INTERRUPT_ENABLE) |
| | (1 << DATA_IN_TOKEN_INTERRUPT_ENABLE); |
| net2272_ep_write(ep, EP_IRQENB, scratch); |
| |
| if ((u.r.bRequestType & USB_TYPE_MASK) != USB_TYPE_STANDARD) |
| goto delegate; |
| switch (u.r.bRequest) { |
| case USB_REQ_GET_STATUS: { |
| struct net2272_ep *e; |
| u16 status = 0; |
| |
| switch (u.r.bRequestType & USB_RECIP_MASK) { |
| case USB_RECIP_ENDPOINT: |
| e = net2272_get_ep_by_addr(dev, u.r.wIndex); |
| if (!e || u.r.wLength > 2) |
| goto do_stall; |
| if (net2272_ep_read(e, EP_RSPSET) & (1 << ENDPOINT_HALT)) |
| status = cpu_to_le16(1); |
| else |
| status = cpu_to_le16(0); |
| |
| /* don't bother with a request object! */ |
| net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); |
| writew(status, net2272_reg_addr(dev, EP_DATA)); |
| set_fifo_bytecount(&dev->ep[0], 0); |
| allow_status(ep); |
| dev_vdbg(dev->dev, "%s stat %02x\n", |
| ep->ep.name, status); |
| goto next_endpoints; |
| case USB_RECIP_DEVICE: |
| if (u.r.wLength > 2) |
| goto do_stall; |
| if (dev->gadget.is_selfpowered) |
| status = (1 << USB_DEVICE_SELF_POWERED); |
| |
| /* don't bother with a request object! */ |
| net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); |
| writew(status, net2272_reg_addr(dev, EP_DATA)); |
| set_fifo_bytecount(&dev->ep[0], 0); |
| allow_status(ep); |
| dev_vdbg(dev->dev, "device stat %02x\n", status); |
| goto next_endpoints; |
| case USB_RECIP_INTERFACE: |
| if (u.r.wLength > 2) |
| goto do_stall; |
| |
| /* don't bother with a request object! */ |
| net2272_ep_write(&dev->ep[0], EP_IRQENB, 0); |
| writew(status, net2272_reg_addr(dev, EP_DATA)); |
| set_fifo_bytecount(&dev->ep[0], 0); |
| allow_status(ep); |
| dev_vdbg(dev->dev, "interface status %02x\n", status); |
| goto next_endpoints; |
| } |
| |
| break; |
| } |
| case USB_REQ_CLEAR_FEATURE: { |
| struct net2272_ep *e; |
| |
| if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
| goto delegate; |
| if (u.r.wValue != USB_ENDPOINT_HALT || |
| u.r.wLength != 0) |
| goto do_stall; |
| e = net2272_get_ep_by_addr(dev, u.r.wIndex); |
| if (!e) |
| goto do_stall; |
| if (e->wedged) { |
| dev_vdbg(dev->dev, "%s wedged, halt not cleared\n", |
| ep->ep.name); |
| } else { |
| dev_vdbg(dev->dev, "%s clear halt\n", ep->ep.name); |
| clear_halt(e); |
| } |
| allow_status(ep); |
| goto next_endpoints; |
| } |
| case USB_REQ_SET_FEATURE: { |
| struct net2272_ep *e; |
| |
| if (u.r.bRequestType == USB_RECIP_DEVICE) { |
| if (u.r.wIndex != NORMAL_OPERATION) |
| net2272_set_test_mode(dev, (u.r.wIndex >> 8)); |
| allow_status(ep); |
| dev_vdbg(dev->dev, "test mode: %d\n", u.r.wIndex); |
| goto next_endpoints; |
| } else if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
| goto delegate; |
| if (u.r.wValue != USB_ENDPOINT_HALT || |
| u.r.wLength != 0) |
| goto do_stall; |
| e = net2272_get_ep_by_addr(dev, u.r.wIndex); |
| if (!e) |
| goto do_stall; |
| set_halt(e); |
| allow_status(ep); |
| dev_vdbg(dev->dev, "%s set halt\n", ep->ep.name); |
| goto next_endpoints; |
| } |
| case USB_REQ_SET_ADDRESS: { |
| net2272_write(dev, OURADDR, u.r.wValue & 0xff); |
| allow_status(ep); |
| break; |
| } |
| default: |
| delegate: |
| dev_vdbg(dev->dev, "setup %02x.%02x v%04x i%04x " |
| "ep_cfg %08x\n", |
| u.r.bRequestType, u.r.bRequest, |
| u.r.wValue, u.r.wIndex, |
| net2272_ep_read(ep, EP_CFG)); |
| if (dev->async_callbacks) { |
| spin_unlock(&dev->lock); |
| tmp = dev->driver->setup(&dev->gadget, &u.r); |
| spin_lock(&dev->lock); |
| } |
| } |
| |
| /* stall ep0 on error */ |
| if (tmp < 0) { |
| do_stall: |
| dev_vdbg(dev->dev, "req %02x.%02x protocol STALL; stat %d\n", |
| u.r.bRequestType, u.r.bRequest, tmp); |
| dev->protocol_stall = 1; |
| } |
| /* endpoint dma irq? */ |
| } else if (stat & (1 << DMA_DONE_INTERRUPT)) { |
| net2272_cancel_dma(dev); |
| net2272_write(dev, IRQSTAT0, 1 << DMA_DONE_INTERRUPT); |
| stat &= ~(1 << DMA_DONE_INTERRUPT); |
| num = (net2272_read(dev, DMAREQ) & (1 << DMA_ENDPOINT_SELECT)) |
| ? 2 : 1; |
| |
| ep = &dev->ep[num]; |
| net2272_handle_dma(ep); |
| } |
| |
| next_endpoints: |
| /* endpoint data irq? */ |
| scratch = stat & 0x0f; |
| stat &= ~0x0f; |
| for (num = 0; scratch; num++) { |
| u8 t; |
| |
| /* does this endpoint's FIFO and queue need tending? */ |
| t = 1 << num; |
| if ((scratch & t) == 0) |
| continue; |
| scratch ^= t; |
| |
| ep = &dev->ep[num]; |
| net2272_handle_ep(ep); |
| } |
| |
| /* some interrupts we can just ignore */ |
| stat &= ~(1 << SOF_INTERRUPT); |
| |
| if (stat) |
| dev_dbg(dev->dev, "unhandled irqstat0 %02x\n", stat); |
| } |
| |
| static void |
| net2272_handle_stat1_irqs(struct net2272 *dev, u8 stat) |
| { |
| u8 tmp, mask; |
| |
| /* after disconnect there's nothing else to do! */ |
| tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); |
| mask = (1 << USB_HIGH_SPEED) | (1 << USB_FULL_SPEED); |
| |
| if (stat & tmp) { |
| bool reset = false; |
| bool disconnect = false; |
| |
| /* |
| * Ignore disconnects and resets if the speed hasn't been set. |
| * VBUS can bounce and there's always an initial reset. |
| */ |
| net2272_write(dev, IRQSTAT1, tmp); |
| if (dev->gadget.speed != USB_SPEED_UNKNOWN) { |
| if ((stat & (1 << VBUS_INTERRUPT)) && |
| (net2272_read(dev, USBCTL1) & |
| (1 << VBUS_PIN)) == 0) { |
| disconnect = true; |
| dev_dbg(dev->dev, "disconnect %s\n", |
| dev->driver->driver.name); |
| } else if ((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) && |
| (net2272_read(dev, USBCTL1) & mask) |
| == 0) { |
| reset = true; |
| dev_dbg(dev->dev, "reset %s\n", |
| dev->driver->driver.name); |
| } |
| |
| if (disconnect || reset) { |
| stop_activity(dev, dev->driver); |
| net2272_ep0_start(dev); |
| if (dev->async_callbacks) { |
| spin_unlock(&dev->lock); |
| if (reset) |
| usb_gadget_udc_reset(&dev->gadget, dev->driver); |
| else |
| (dev->driver->disconnect)(&dev->gadget); |
| spin_lock(&dev->lock); |
| } |
| return; |
| } |
| } |
| stat &= ~tmp; |
| |
| if (!stat) |
| return; |
| } |
| |
| tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); |
| if (stat & tmp) { |
| net2272_write(dev, IRQSTAT1, tmp); |
| if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { |
| if (dev->async_callbacks && dev->driver->suspend) |
| dev->driver->suspend(&dev->gadget); |
| if (!enable_suspend) { |
| stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); |
| dev_dbg(dev->dev, "Suspend disabled, ignoring\n"); |
| } |
| } else { |
| if (dev->async_callbacks && dev->driver->resume) |
| dev->driver->resume(&dev->gadget); |
| } |
| stat &= ~tmp; |
| } |
| |
| /* clear any other status/irqs */ |
| if (stat) |
| net2272_write(dev, IRQSTAT1, stat); |
| |
| /* some status we can just ignore */ |
| stat &= ~((1 << CONTROL_STATUS_INTERRUPT) |
| | (1 << SUSPEND_REQUEST_INTERRUPT) |
| | (1 << RESUME_INTERRUPT)); |
| if (!stat) |
| return; |
| else |
| dev_dbg(dev->dev, "unhandled irqstat1 %02x\n", stat); |
| } |
| |
| static irqreturn_t net2272_irq(int irq, void *_dev) |
| { |
| struct net2272 *dev = _dev; |
| #if defined(PLX_PCI_RDK) || defined(PLX_PCI_RDK2) |
| u32 intcsr; |
| #endif |
| #if defined(PLX_PCI_RDK) |
| u8 dmareq; |
| #endif |
| spin_lock(&dev->lock); |
| #if defined(PLX_PCI_RDK) |
| intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); |
| |
| if ((intcsr & LOCAL_INTERRUPT_TEST) == LOCAL_INTERRUPT_TEST) { |
| writel(intcsr & ~(1 << PCI_INTERRUPT_ENABLE), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); |
| net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); |
| intcsr = readl(dev->rdk1.plx9054_base_addr + INTCSR); |
| writel(intcsr | (1 << PCI_INTERRUPT_ENABLE), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| } |
| if ((intcsr & DMA_CHANNEL_0_TEST) == DMA_CHANNEL_0_TEST) { |
| writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), |
| dev->rdk1.plx9054_base_addr + DMACSR0); |
| |
| dmareq = net2272_read(dev, DMAREQ); |
| if (dmareq & 0x01) |
| net2272_handle_dma(&dev->ep[2]); |
| else |
| net2272_handle_dma(&dev->ep[1]); |
| } |
| #endif |
| #if defined(PLX_PCI_RDK2) |
| /* see if PCI int for us by checking irqstat */ |
| intcsr = readl(dev->rdk2.fpga_base_addr + RDK2_IRQSTAT); |
| if (!(intcsr & (1 << NET2272_PCI_IRQ))) { |
| spin_unlock(&dev->lock); |
| return IRQ_NONE; |
| } |
| /* check dma interrupts */ |
| #endif |
| /* Platform/devcice interrupt handler */ |
| #if !defined(PLX_PCI_RDK) |
| net2272_handle_stat1_irqs(dev, net2272_read(dev, IRQSTAT1)); |
| net2272_handle_stat0_irqs(dev, net2272_read(dev, IRQSTAT0)); |
| #endif |
| spin_unlock(&dev->lock); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int net2272_present(struct net2272 *dev) |
| { |
| /* |
| * Quick test to see if CPU can communicate properly with the NET2272. |
| * Verifies connection using writes and reads to write/read and |
| * read-only registers. |
| * |
| * This routine is strongly recommended especially during early bring-up |
| * of new hardware, however for designs that do not apply Power On System |
| * Tests (POST) it may discarded (or perhaps minimized). |
| */ |
| unsigned int ii; |
| u8 val, refval; |
| |
| /* Verify NET2272 write/read SCRATCH register can write and read */ |
| refval = net2272_read(dev, SCRATCH); |
| for (ii = 0; ii < 0x100; ii += 7) { |
| net2272_write(dev, SCRATCH, ii); |
| val = net2272_read(dev, SCRATCH); |
| if (val != ii) { |
| dev_dbg(dev->dev, |
| "%s: write/read SCRATCH register test failed: " |
| "wrote:0x%2.2x, read:0x%2.2x\n", |
| __func__, ii, val); |
| return -EINVAL; |
| } |
| } |
| /* To be nice, we write the original SCRATCH value back: */ |
| net2272_write(dev, SCRATCH, refval); |
| |
| /* Verify NET2272 CHIPREV register is read-only: */ |
| refval = net2272_read(dev, CHIPREV_2272); |
| for (ii = 0; ii < 0x100; ii += 7) { |
| net2272_write(dev, CHIPREV_2272, ii); |
| val = net2272_read(dev, CHIPREV_2272); |
| if (val != refval) { |
| dev_dbg(dev->dev, |
| "%s: write/read CHIPREV register test failed: " |
| "wrote 0x%2.2x, read:0x%2.2x expected:0x%2.2x\n", |
| __func__, ii, val, refval); |
| return -EINVAL; |
| } |
| } |
| |
| /* |
| * Verify NET2272's "NET2270 legacy revision" register |
| * - NET2272 has two revision registers. The NET2270 legacy revision |
| * register should read the same value, regardless of the NET2272 |
| * silicon revision. The legacy register applies to NET2270 |
| * firmware being applied to the NET2272. |
| */ |
| val = net2272_read(dev, CHIPREV_LEGACY); |
| if (val != NET2270_LEGACY_REV) { |
| /* |
| * Unexpected legacy revision value |
| * - Perhaps the chip is a NET2270? |
| */ |
| dev_dbg(dev->dev, |
| "%s: WARNING: UNEXPECTED NET2272 LEGACY REGISTER VALUE:\n" |
| " - CHIPREV_LEGACY: expected 0x%2.2x, got:0x%2.2x. (Not NET2272?)\n", |
| __func__, NET2270_LEGACY_REV, val); |
| return -EINVAL; |
| } |
| |
| /* |
| * Verify NET2272 silicon revision |
| * - This revision register is appropriate for the silicon version |
| * of the NET2272 |
| */ |
| val = net2272_read(dev, CHIPREV_2272); |
| switch (val) { |
| case CHIPREV_NET2272_R1: |
| /* |
| * NET2272 Rev 1 has DMA related errata: |
| * - Newer silicon (Rev 1A or better) required |
| */ |
| dev_dbg(dev->dev, |
| "%s: Rev 1 detected: newer silicon recommended for DMA support\n", |
| __func__); |
| break; |
| case CHIPREV_NET2272_R1A: |
| break; |
| default: |
| /* NET2272 silicon version *may* not work with this firmware */ |
| dev_dbg(dev->dev, |
| "%s: unexpected silicon revision register value: " |
| " CHIPREV_2272: 0x%2.2x\n", |
| __func__, val); |
| /* |
| * Return Success, even though the chip rev is not an expected value |
| * - Older, pre-built firmware can attempt to operate on newer silicon |
| * - Often, new silicon is perfectly compatible |
| */ |
| } |
| |
| /* Success: NET2272 checks out OK */ |
| return 0; |
| } |
| |
| static void |
| net2272_gadget_release(struct device *_dev) |
| { |
| struct net2272 *dev = container_of(_dev, struct net2272, gadget.dev); |
| |
| kfree(dev); |
| } |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static void |
| net2272_remove(struct net2272 *dev) |
| { |
| if (dev->added) |
| usb_del_gadget(&dev->gadget); |
| free_irq(dev->irq, dev); |
| iounmap(dev->base_addr); |
| device_remove_file(dev->dev, &dev_attr_registers); |
| |
| dev_info(dev->dev, "unbind\n"); |
| } |
| |
| static struct net2272 *net2272_probe_init(struct device *dev, unsigned int irq) |
| { |
| struct net2272 *ret; |
| |
| if (!irq) { |
| dev_dbg(dev, "No IRQ!\n"); |
| return ERR_PTR(-ENODEV); |
| } |
| |
| /* alloc, and start init */ |
| ret = kzalloc(sizeof(*ret), GFP_KERNEL); |
| if (!ret) |
| return ERR_PTR(-ENOMEM); |
| |
| spin_lock_init(&ret->lock); |
| ret->irq = irq; |
| ret->dev = dev; |
| ret->gadget.ops = &net2272_ops; |
| ret->gadget.max_speed = USB_SPEED_HIGH; |
| |
| /* the "gadget" abstracts/virtualizes the controller */ |
| ret->gadget.name = driver_name; |
| usb_initialize_gadget(dev, &ret->gadget, net2272_gadget_release); |
| |
| return ret; |
| } |
| |
| static int |
| net2272_probe_fin(struct net2272 *dev, unsigned int irqflags) |
| { |
| int ret; |
| |
| /* See if there... */ |
| if (net2272_present(dev)) { |
| dev_warn(dev->dev, "2272 not found!\n"); |
| ret = -ENODEV; |
| goto err; |
| } |
| |
| net2272_usb_reset(dev); |
| net2272_usb_reinit(dev); |
| |
| ret = request_irq(dev->irq, net2272_irq, irqflags, driver_name, dev); |
| if (ret) { |
| dev_err(dev->dev, "request interrupt %i failed\n", dev->irq); |
| goto err; |
| } |
| |
| dev->chiprev = net2272_read(dev, CHIPREV_2272); |
| |
| /* done */ |
| dev_info(dev->dev, "%s\n", driver_desc); |
| dev_info(dev->dev, "irq %i, mem %p, chip rev %04x, dma %s\n", |
| dev->irq, dev->base_addr, dev->chiprev, |
| dma_mode_string()); |
| dev_info(dev->dev, "version: %s\n", driver_vers); |
| |
| ret = device_create_file(dev->dev, &dev_attr_registers); |
| if (ret) |
| goto err_irq; |
| |
| ret = usb_add_gadget(&dev->gadget); |
| if (ret) |
| goto err_add_udc; |
| dev->added = 1; |
| |
| return 0; |
| |
| err_add_udc: |
| device_remove_file(dev->dev, &dev_attr_registers); |
| err_irq: |
| free_irq(dev->irq, dev); |
| err: |
| return ret; |
| } |
| |
| #ifdef CONFIG_USB_PCI |
| |
| /* |
| * wrap this driver around the specified device, but |
| * don't respond over USB until a gadget driver binds to us |
| */ |
| |
| static int |
| net2272_rdk1_probe(struct pci_dev *pdev, struct net2272 *dev) |
| { |
| unsigned long resource, len, tmp; |
| void __iomem *mem_mapped_addr[4]; |
| int ret, i; |
| |
| /* |
| * BAR 0 holds PLX 9054 config registers |
| * BAR 1 is i/o memory; unused here |
| * BAR 2 holds EPLD config registers |
| * BAR 3 holds NET2272 registers |
| */ |
| |
| /* Find and map all address spaces */ |
| for (i = 0; i < 4; ++i) { |
| if (i == 1) |
| continue; /* BAR1 unused */ |
| |
| resource = pci_resource_start(pdev, i); |
| len = pci_resource_len(pdev, i); |
| |
| if (!request_mem_region(resource, len, driver_name)) { |
| dev_dbg(dev->dev, "controller already in use\n"); |
| ret = -EBUSY; |
| goto err; |
| } |
| |
| mem_mapped_addr[i] = ioremap(resource, len); |
| if (mem_mapped_addr[i] == NULL) { |
| release_mem_region(resource, len); |
| dev_dbg(dev->dev, "can't map memory\n"); |
| ret = -EFAULT; |
| goto err; |
| } |
| } |
| |
| dev->rdk1.plx9054_base_addr = mem_mapped_addr[0]; |
| dev->rdk1.epld_base_addr = mem_mapped_addr[2]; |
| dev->base_addr = mem_mapped_addr[3]; |
| |
| /* Set PLX 9054 bus width (16 bits) */ |
| tmp = readl(dev->rdk1.plx9054_base_addr + LBRD1); |
| writel((tmp & ~(3 << MEMORY_SPACE_LOCAL_BUS_WIDTH)) | W16_BIT, |
| dev->rdk1.plx9054_base_addr + LBRD1); |
| |
| /* Enable PLX 9054 Interrupts */ |
| writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) | |
| (1 << PCI_INTERRUPT_ENABLE) | |
| (1 << LOCAL_INTERRUPT_INPUT_ENABLE), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| |
| writeb((1 << CHANNEL_CLEAR_INTERRUPT | (0 << CHANNEL_ENABLE)), |
| dev->rdk1.plx9054_base_addr + DMACSR0); |
| |
| /* reset */ |
| writeb((1 << EPLD_DMA_ENABLE) | |
| (1 << DMA_CTL_DACK) | |
| (1 << DMA_TIMEOUT_ENABLE) | |
| (1 << USER) | |
| (0 << MPX_MODE) | |
| (1 << BUSWIDTH) | |
| (1 << NET2272_RESET), |
| dev->base_addr + EPLD_IO_CONTROL_REGISTER); |
| |
| mb(); |
| writeb(readb(dev->base_addr + EPLD_IO_CONTROL_REGISTER) & |
| ~(1 << NET2272_RESET), |
| dev->base_addr + EPLD_IO_CONTROL_REGISTER); |
| udelay(200); |
| |
| return 0; |
| |
| err: |
| while (--i >= 0) { |
| if (i == 1) |
| continue; /* BAR1 unused */ |
| iounmap(mem_mapped_addr[i]); |
| release_mem_region(pci_resource_start(pdev, i), |
| pci_resource_len(pdev, i)); |
| } |
| |
| return ret; |
| } |
| |
| static int |
| net2272_rdk2_probe(struct pci_dev *pdev, struct net2272 *dev) |
| { |
| unsigned long resource, len; |
| void __iomem *mem_mapped_addr[2]; |
| int ret, i; |
| |
| /* |
| * BAR 0 holds FGPA config registers |
| * BAR 1 holds NET2272 registers |
| */ |
| |
| /* Find and map all address spaces, bar2-3 unused in rdk 2 */ |
| for (i = 0; i < 2; ++i) { |
| resource = pci_resource_start(pdev, i); |
| len = pci_resource_len(pdev, i); |
| |
| if (!request_mem_region(resource, len, driver_name)) { |
| dev_dbg(dev->dev, "controller already in use\n"); |
| ret = -EBUSY; |
| goto err; |
| } |
| |
| mem_mapped_addr[i] = ioremap(resource, len); |
| if (mem_mapped_addr[i] == NULL) { |
| release_mem_region(resource, len); |
| dev_dbg(dev->dev, "can't map memory\n"); |
| ret = -EFAULT; |
| goto err; |
| } |
| } |
| |
| dev->rdk2.fpga_base_addr = mem_mapped_addr[0]; |
| dev->base_addr = mem_mapped_addr[1]; |
| |
| mb(); |
| /* Set 2272 bus width (16 bits) and reset */ |
| writel((1 << CHIP_RESET), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); |
| udelay(200); |
| writel((1 << BUS_WIDTH), dev->rdk2.fpga_base_addr + RDK2_LOCCTLRDK); |
| /* Print fpga version number */ |
| dev_info(dev->dev, "RDK2 FPGA version %08x\n", |
| readl(dev->rdk2.fpga_base_addr + RDK2_FPGAREV)); |
| /* Enable FPGA Interrupts */ |
| writel((1 << NET2272_PCI_IRQ), dev->rdk2.fpga_base_addr + RDK2_IRQENB); |
| |
| return 0; |
| |
| err: |
| while (--i >= 0) { |
| iounmap(mem_mapped_addr[i]); |
| release_mem_region(pci_resource_start(pdev, i), |
| pci_resource_len(pdev, i)); |
| } |
| |
| return ret; |
| } |
| |
| static int |
| net2272_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) |
| { |
| struct net2272 *dev; |
| int ret; |
| |
| dev = net2272_probe_init(&pdev->dev, pdev->irq); |
| if (IS_ERR(dev)) |
| return PTR_ERR(dev); |
| dev->dev_id = pdev->device; |
| |
| if (pci_enable_device(pdev) < 0) { |
| ret = -ENODEV; |
| goto err_put; |
| } |
| |
| pci_set_master(pdev); |
| |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_RDK1: ret = net2272_rdk1_probe(pdev, dev); break; |
| case PCI_DEVICE_ID_RDK2: ret = net2272_rdk2_probe(pdev, dev); break; |
| default: BUG(); |
| } |
| if (ret) |
| goto err_pci; |
| |
| ret = net2272_probe_fin(dev, 0); |
| if (ret) |
| goto err_pci; |
| |
| pci_set_drvdata(pdev, dev); |
| |
| return 0; |
| |
| err_pci: |
| pci_disable_device(pdev); |
| err_put: |
| usb_put_gadget(&dev->gadget); |
| |
| return ret; |
| } |
| |
| static void |
| net2272_rdk1_remove(struct pci_dev *pdev, struct net2272 *dev) |
| { |
| int i; |
| |
| /* disable PLX 9054 interrupts */ |
| writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & |
| ~(1 << PCI_INTERRUPT_ENABLE), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| |
| /* clean up resources allocated during probe() */ |
| iounmap(dev->rdk1.plx9054_base_addr); |
| iounmap(dev->rdk1.epld_base_addr); |
| |
| for (i = 0; i < 4; ++i) { |
| if (i == 1) |
| continue; /* BAR1 unused */ |
| release_mem_region(pci_resource_start(pdev, i), |
| pci_resource_len(pdev, i)); |
| } |
| } |
| |
| static void |
| net2272_rdk2_remove(struct pci_dev *pdev, struct net2272 *dev) |
| { |
| int i; |
| |
| /* disable fpga interrupts |
| writel(readl(dev->rdk1.plx9054_base_addr + INTCSR) & |
| ~(1 << PCI_INTERRUPT_ENABLE), |
| dev->rdk1.plx9054_base_addr + INTCSR); |
| */ |
| |
| /* clean up resources allocated during probe() */ |
| iounmap(dev->rdk2.fpga_base_addr); |
| |
| for (i = 0; i < 2; ++i) |
| release_mem_region(pci_resource_start(pdev, i), |
| pci_resource_len(pdev, i)); |
| } |
| |
| static void |
| net2272_pci_remove(struct pci_dev *pdev) |
| { |
| struct net2272 *dev = pci_get_drvdata(pdev); |
| |
| net2272_remove(dev); |
| |
| switch (pdev->device) { |
| case PCI_DEVICE_ID_RDK1: net2272_rdk1_remove(pdev, dev); break; |
| case PCI_DEVICE_ID_RDK2: net2272_rdk2_remove(pdev, dev); break; |
| default: BUG(); |
| } |
| |
| pci_disable_device(pdev); |
| |
| usb_put_gadget(&dev->gadget); |
| } |
| |
| /* Table of matching PCI IDs */ |
| static struct pci_device_id pci_ids[] = { |
| { /* RDK 1 card */ |
| .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), |
| .class_mask = 0, |
| .vendor = PCI_VENDOR_ID_PLX, |
| .device = PCI_DEVICE_ID_RDK1, |
| .subvendor = PCI_ANY_ID, |
| .subdevice = PCI_ANY_ID, |
| }, |
| { /* RDK 2 card */ |
| .class = ((PCI_CLASS_BRIDGE_OTHER << 8) | 0xfe), |
| .class_mask = 0, |
| .vendor = PCI_VENDOR_ID_PLX, |
| .device = PCI_DEVICE_ID_RDK2, |
| .subvendor = PCI_ANY_ID, |
| .subdevice = PCI_ANY_ID, |
| }, |
| { } |
| }; |
| MODULE_DEVICE_TABLE(pci, pci_ids); |
| |
| static struct pci_driver net2272_pci_driver = { |
| .name = driver_name, |
| .id_table = pci_ids, |
| |
| .probe = net2272_pci_probe, |
| .remove = net2272_pci_remove, |
| }; |
| |
| static int net2272_pci_register(void) |
| { |
| return pci_register_driver(&net2272_pci_driver); |
| } |
| |
| static void net2272_pci_unregister(void) |
| { |
| pci_unregister_driver(&net2272_pci_driver); |
| } |
| |
| #else |
| static inline int net2272_pci_register(void) { return 0; } |
| static inline void net2272_pci_unregister(void) { } |
| #endif |
| |
| /*---------------------------------------------------------------------------*/ |
| |
| static int |
| net2272_plat_probe(struct platform_device *pdev) |
| { |
| struct net2272 *dev; |
| int ret; |
| unsigned int irqflags; |
| resource_size_t base, len; |
| struct resource *iomem, *iomem_bus, *irq_res; |
| |
| irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); |
| iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| iomem_bus = platform_get_resource(pdev, IORESOURCE_BUS, 0); |
| if (!irq_res || !iomem) { |
| dev_err(&pdev->dev, "must provide irq/base addr"); |
| return -EINVAL; |
| } |
| |
| dev = net2272_probe_init(&pdev->dev, irq_res->start); |
| if (IS_ERR(dev)) |
| return PTR_ERR(dev); |
| |
| irqflags = 0; |
| if (irq_res->flags & IORESOURCE_IRQ_HIGHEDGE) |
| irqflags |= IRQF_TRIGGER_RISING; |
| if (irq_res->flags & IORESOURCE_IRQ_LOWEDGE) |
| irqflags |= IRQF_TRIGGER_FALLING; |
| if (irq_res->flags & IORESOURCE_IRQ_HIGHLEVEL) |
| irqflags |= IRQF_TRIGGER_HIGH; |
| if (irq_res->flags & IORESOURCE_IRQ_LOWLEVEL) |
| irqflags |= IRQF_TRIGGER_LOW; |
| |
| base = iomem->start; |
| len = resource_size(iomem); |
| if (iomem_bus) |
| dev->base_shift = iomem_bus->start; |
| |
| if (!request_mem_region(base, len, driver_name)) { |
| dev_dbg(dev->dev, "get request memory region!\n"); |
| ret = -EBUSY; |
| goto err; |
| } |
| dev->base_addr = ioremap(base, len); |
| if (!dev->base_addr) { |
| dev_dbg(dev->dev, "can't map memory\n"); |
| ret = -EFAULT; |
| goto err_req; |
| } |
| |
| ret = net2272_probe_fin(dev, IRQF_TRIGGER_LOW); |
| if (ret) |
| goto err_io; |
| |
| platform_set_drvdata(pdev, dev); |
| dev_info(&pdev->dev, "running in 16-bit, %sbyte swap local bus mode\n", |
| (net2272_read(dev, LOCCTL) & (1 << BYTE_SWAP)) ? "" : "no "); |
| |
| return 0; |
| |
| err_io: |
| iounmap(dev->base_addr); |
| err_req: |
| release_mem_region(base, len); |
| err: |
| usb_put_gadget(&dev->gadget); |
| |
| return ret; |
| } |
| |
| static int |
| net2272_plat_remove(struct platform_device *pdev) |
| { |
| struct net2272 *dev = platform_get_drvdata(pdev); |
| |
| net2272_remove(dev); |
| |
| release_mem_region(pdev->resource[0].start, |
| resource_size(&pdev->resource[0])); |
| |
| usb_put_gadget(&dev->gadget); |
| |
| return 0; |
| } |
| |
| static struct platform_driver net2272_plat_driver = { |
| .probe = net2272_plat_probe, |
| .remove = net2272_plat_remove, |
| .driver = { |
| .name = driver_name, |
| }, |
| /* FIXME .suspend, .resume */ |
| }; |
| MODULE_ALIAS("platform:net2272"); |
| |
| static int __init net2272_init(void) |
| { |
| int ret; |
| |
| ret = net2272_pci_register(); |
| if (ret) |
| return ret; |
| ret = platform_driver_register(&net2272_plat_driver); |
| if (ret) |
| goto err_pci; |
| return ret; |
| |
| err_pci: |
| net2272_pci_unregister(); |
| return ret; |
| } |
| module_init(net2272_init); |
| |
| static void __exit net2272_cleanup(void) |
| { |
| net2272_pci_unregister(); |
| platform_driver_unregister(&net2272_plat_driver); |
| } |
| module_exit(net2272_cleanup); |
| |
| MODULE_DESCRIPTION(DRIVER_DESC); |
| MODULE_AUTHOR("PLX Technology, Inc."); |
| MODULE_LICENSE("GPL"); |