Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Driver for the PLX NET2280 USB device controller. |
| 3 | * Specs and errata are available from <http://www.plxtech.com>. |
| 4 | * |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 5 | * PLX Technology Inc. (formerly NetChip Technology) supported the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | * development of this driver. |
| 7 | * |
| 8 | * |
| 9 | * CODE STATUS HIGHLIGHTS |
| 10 | * |
| 11 | * This driver should work well with most "gadget" drivers, including |
| 12 | * the File Storage, Serial, and Ethernet/RNDIS gadget drivers |
| 13 | * as well as Gadget Zero and Gadgetfs. |
| 14 | * |
| 15 | * DMA is enabled by default. Drivers using transfer queues might use |
| 16 | * DMA chaining to remove IRQ latencies between transfers. (Except when |
| 17 | * short OUT transfers happen.) Drivers can use the req->no_interrupt |
| 18 | * hint to completely eliminate some IRQs, if a later IRQ is guaranteed |
| 19 | * and DMA chaining is enabled. |
| 20 | * |
| 21 | * Note that almost all the errata workarounds here are only needed for |
| 22 | * rev1 chips. Rev1a silicon (0110) fixes almost all of them. |
| 23 | */ |
| 24 | |
| 25 | /* |
| 26 | * Copyright (C) 2003 David Brownell |
| 27 | * Copyright (C) 2003-2005 PLX Technology, Inc. |
| 28 | * |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 29 | * Modified Seth Levy 2005 PLX Technology, Inc. to provide compatibility |
| 30 | * with 2282 chip |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 31 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | * This program is free software; you can redistribute it and/or modify |
| 33 | * it under the terms of the GNU General Public License as published by |
| 34 | * the Free Software Foundation; either version 2 of the License, or |
| 35 | * (at your option) any later version. |
| 36 | * |
| 37 | * This program is distributed in the hope that it will be useful, |
| 38 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 39 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 40 | * GNU General Public License for more details. |
| 41 | * |
| 42 | * You should have received a copy of the GNU General Public License |
| 43 | * along with this program; if not, write to the Free Software |
| 44 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 45 | */ |
| 46 | |
| 47 | #undef DEBUG /* messages on error and most fault paths */ |
| 48 | #undef VERBOSE /* extra debug messages (success too) */ |
| 49 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | #include <linux/module.h> |
| 51 | #include <linux/pci.h> |
David Brownell | 682d4c8 | 2006-01-18 23:55:08 -0800 | [diff] [blame] | 52 | #include <linux/dma-mapping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | #include <linux/kernel.h> |
| 54 | #include <linux/delay.h> |
| 55 | #include <linux/ioport.h> |
| 56 | #include <linux/sched.h> |
| 57 | #include <linux/slab.h> |
| 58 | #include <linux/smp_lock.h> |
| 59 | #include <linux/errno.h> |
| 60 | #include <linux/init.h> |
| 61 | #include <linux/timer.h> |
| 62 | #include <linux/list.h> |
| 63 | #include <linux/interrupt.h> |
| 64 | #include <linux/moduleparam.h> |
| 65 | #include <linux/device.h> |
| 66 | #include <linux/usb_ch9.h> |
| 67 | #include <linux/usb_gadget.h> |
| 68 | |
| 69 | #include <asm/byteorder.h> |
| 70 | #include <asm/io.h> |
| 71 | #include <asm/irq.h> |
| 72 | #include <asm/system.h> |
| 73 | #include <asm/unaligned.h> |
| 74 | |
| 75 | |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 76 | #define DRIVER_DESC "PLX NET228x USB Peripheral Controller" |
| 77 | #define DRIVER_VERSION "2005 Sept 27" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | #define DMA_ADDR_INVALID (~(dma_addr_t)0) |
| 80 | #define EP_DONTUSE 13 /* nonzero */ |
| 81 | |
| 82 | #define USE_RDK_LEDS /* GPIO pins control three LEDs */ |
| 83 | |
| 84 | |
| 85 | static const char driver_name [] = "net2280"; |
| 86 | static const char driver_desc [] = DRIVER_DESC; |
| 87 | |
| 88 | static const char ep0name [] = "ep0"; |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 89 | static const char *const ep_name [] = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | ep0name, |
| 91 | "ep-a", "ep-b", "ep-c", "ep-d", |
| 92 | "ep-e", "ep-f", |
| 93 | }; |
| 94 | |
| 95 | /* use_dma -- general goodness, fewer interrupts, less cpu load (vs PIO) |
| 96 | * use_dma_chaining -- dma descriptor queueing gives even more irq reduction |
| 97 | * |
| 98 | * The net2280 DMA engines are not tightly integrated with their FIFOs; |
| 99 | * not all cases are (yet) handled well in this driver or the silicon. |
| 100 | * Some gadget drivers work better with the dma support here than others. |
| 101 | * These two parameters let you use PIO or more aggressive DMA. |
| 102 | */ |
| 103 | static int use_dma = 1; |
| 104 | static int use_dma_chaining = 0; |
| 105 | |
| 106 | /* "modprobe net2280 use_dma=n" etc */ |
| 107 | module_param (use_dma, bool, S_IRUGO); |
| 108 | module_param (use_dma_chaining, bool, S_IRUGO); |
| 109 | |
| 110 | |
| 111 | /* mode 0 == ep-{a,b,c,d} 1K fifo each |
| 112 | * mode 1 == ep-{a,b} 2K fifo each, ep-{c,d} unavailable |
| 113 | * mode 2 == ep-a 2K fifo, ep-{b,c} 1K each, ep-d unavailable |
| 114 | */ |
| 115 | static ushort fifo_mode = 0; |
| 116 | |
| 117 | /* "modprobe net2280 fifo_mode=1" etc */ |
| 118 | module_param (fifo_mode, ushort, 0644); |
| 119 | |
| 120 | /* enable_suspend -- When enabled, the driver will respond to |
| 121 | * USB suspend requests by powering down the NET2280. Otherwise, |
| 122 | * USB suspend requests will be ignored. This is acceptible for |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 123 | * self-powered devices |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | */ |
| 125 | static int enable_suspend = 0; |
| 126 | |
| 127 | /* "modprobe net2280 enable_suspend=1" etc */ |
| 128 | module_param (enable_suspend, bool, S_IRUGO); |
| 129 | |
| 130 | |
| 131 | #define DIR_STRING(bAddress) (((bAddress) & USB_DIR_IN) ? "in" : "out") |
| 132 | |
| 133 | #if defined(CONFIG_USB_GADGET_DEBUG_FILES) || defined (DEBUG) |
| 134 | static char *type_string (u8 bmAttributes) |
| 135 | { |
| 136 | switch ((bmAttributes) & USB_ENDPOINT_XFERTYPE_MASK) { |
| 137 | case USB_ENDPOINT_XFER_BULK: return "bulk"; |
| 138 | case USB_ENDPOINT_XFER_ISOC: return "iso"; |
| 139 | case USB_ENDPOINT_XFER_INT: return "intr"; |
| 140 | }; |
| 141 | return "control"; |
| 142 | } |
| 143 | #endif |
| 144 | |
| 145 | #include "net2280.h" |
| 146 | |
| 147 | #define valid_bit __constant_cpu_to_le32 (1 << VALID_BIT) |
| 148 | #define dma_done_ie __constant_cpu_to_le32 (1 << DMA_DONE_INTERRUPT_ENABLE) |
| 149 | |
| 150 | /*-------------------------------------------------------------------------*/ |
| 151 | |
| 152 | static int |
| 153 | net2280_enable (struct usb_ep *_ep, const struct usb_endpoint_descriptor *desc) |
| 154 | { |
| 155 | struct net2280 *dev; |
| 156 | struct net2280_ep *ep; |
| 157 | u32 max, tmp; |
| 158 | unsigned long flags; |
| 159 | |
| 160 | ep = container_of (_ep, struct net2280_ep, ep); |
| 161 | if (!_ep || !desc || ep->desc || _ep->name == ep0name |
| 162 | || desc->bDescriptorType != USB_DT_ENDPOINT) |
| 163 | return -EINVAL; |
| 164 | dev = ep->dev; |
| 165 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 166 | return -ESHUTDOWN; |
| 167 | |
| 168 | /* erratum 0119 workaround ties up an endpoint number */ |
| 169 | if ((desc->bEndpointAddress & 0x0f) == EP_DONTUSE) |
| 170 | return -EDOM; |
| 171 | |
| 172 | /* sanity check ep-e/ep-f since their fifos are small */ |
| 173 | max = le16_to_cpu (desc->wMaxPacketSize) & 0x1fff; |
| 174 | if (ep->num > 4 && max > 64) |
| 175 | return -ERANGE; |
| 176 | |
| 177 | spin_lock_irqsave (&dev->lock, flags); |
| 178 | _ep->maxpacket = max & 0x7ff; |
| 179 | ep->desc = desc; |
| 180 | |
| 181 | /* ep_reset() has already been called */ |
| 182 | ep->stopped = 0; |
| 183 | ep->out_overflow = 0; |
| 184 | |
| 185 | /* set speed-dependent max packet; may kick in high bandwidth */ |
| 186 | set_idx_reg (dev->regs, REG_EP_MAXPKT (dev, ep->num), max); |
| 187 | |
| 188 | /* FIFO lines can't go to different packets. PIO is ok, so |
| 189 | * use it instead of troublesome (non-bulk) multi-packet DMA. |
| 190 | */ |
| 191 | if (ep->dma && (max % 4) != 0 && use_dma_chaining) { |
| 192 | DEBUG (ep->dev, "%s, no dma for maxpacket %d\n", |
| 193 | ep->ep.name, ep->ep.maxpacket); |
| 194 | ep->dma = NULL; |
| 195 | } |
| 196 | |
| 197 | /* set type, direction, address; reset fifo counters */ |
| 198 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); |
| 199 | tmp = (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK); |
| 200 | if (tmp == USB_ENDPOINT_XFER_INT) { |
| 201 | /* erratum 0105 workaround prevents hs NYET */ |
| 202 | if (dev->chiprev == 0100 |
| 203 | && dev->gadget.speed == USB_SPEED_HIGH |
| 204 | && !(desc->bEndpointAddress & USB_DIR_IN)) |
| 205 | writel ((1 << CLEAR_NAK_OUT_PACKETS_MODE), |
| 206 | &ep->regs->ep_rsp); |
| 207 | } else if (tmp == USB_ENDPOINT_XFER_BULK) { |
| 208 | /* catch some particularly blatant driver bugs */ |
| 209 | if ((dev->gadget.speed == USB_SPEED_HIGH |
| 210 | && max != 512) |
| 211 | || (dev->gadget.speed == USB_SPEED_FULL |
| 212 | && max > 64)) { |
| 213 | spin_unlock_irqrestore (&dev->lock, flags); |
| 214 | return -ERANGE; |
| 215 | } |
| 216 | } |
| 217 | ep->is_iso = (tmp == USB_ENDPOINT_XFER_ISOC) ? 1 : 0; |
| 218 | tmp <<= ENDPOINT_TYPE; |
| 219 | tmp |= desc->bEndpointAddress; |
| 220 | tmp |= (4 << ENDPOINT_BYTE_COUNT); /* default full fifo lines */ |
| 221 | tmp |= 1 << ENDPOINT_ENABLE; |
| 222 | wmb (); |
| 223 | |
| 224 | /* for OUT transfers, block the rx fifo until a read is posted */ |
| 225 | ep->is_in = (tmp & USB_DIR_IN) != 0; |
| 226 | if (!ep->is_in) |
| 227 | writel ((1 << SET_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 228 | else if (dev->pdev->device != 0x2280) { |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 229 | /* Added for 2282, Don't use nak packets on an in endpoint, |
| 230 | * this was ignored on 2280 |
| 231 | */ |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 232 | writel ((1 << CLEAR_NAK_OUT_PACKETS) |
| 233 | | (1 << CLEAR_NAK_OUT_PACKETS_MODE), &ep->regs->ep_rsp); |
| 234 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
| 236 | writel (tmp, &ep->regs->ep_cfg); |
| 237 | |
| 238 | /* enable irqs */ |
| 239 | if (!ep->dma) { /* pio, per-packet */ |
| 240 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); |
| 241 | writel (tmp, &dev->regs->pciirqenb0); |
| 242 | |
| 243 | tmp = (1 << DATA_PACKET_RECEIVED_INTERRUPT_ENABLE) |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 244 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT_ENABLE); |
| 245 | if (dev->pdev->device == 0x2280) |
| 246 | tmp |= readl (&ep->regs->ep_irqenb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | writel (tmp, &ep->regs->ep_irqenb); |
| 248 | } else { /* dma, per-request */ |
| 249 | tmp = (1 << (8 + ep->num)); /* completion */ |
| 250 | tmp |= readl (&dev->regs->pciirqenb1); |
| 251 | writel (tmp, &dev->regs->pciirqenb1); |
| 252 | |
| 253 | /* for short OUT transfers, dma completions can't |
| 254 | * advance the queue; do it pio-style, by hand. |
| 255 | * NOTE erratum 0112 workaround #2 |
| 256 | */ |
| 257 | if ((desc->bEndpointAddress & USB_DIR_IN) == 0) { |
| 258 | tmp = (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT_ENABLE); |
| 259 | writel (tmp, &ep->regs->ep_irqenb); |
| 260 | |
| 261 | tmp = (1 << ep->num) | readl (&dev->regs->pciirqenb0); |
| 262 | writel (tmp, &dev->regs->pciirqenb0); |
| 263 | } |
| 264 | } |
| 265 | |
| 266 | tmp = desc->bEndpointAddress; |
| 267 | DEBUG (dev, "enabled %s (ep%d%s-%s) %s max %04x\n", |
| 268 | _ep->name, tmp & 0x0f, DIR_STRING (tmp), |
| 269 | type_string (desc->bmAttributes), |
| 270 | ep->dma ? "dma" : "pio", max); |
| 271 | |
| 272 | /* pci writes may still be posted */ |
| 273 | spin_unlock_irqrestore (&dev->lock, flags); |
| 274 | return 0; |
| 275 | } |
| 276 | |
| 277 | static int handshake (u32 __iomem *ptr, u32 mask, u32 done, int usec) |
| 278 | { |
| 279 | u32 result; |
| 280 | |
| 281 | do { |
| 282 | result = readl (ptr); |
| 283 | if (result == ~(u32)0) /* "device unplugged" */ |
| 284 | return -ENODEV; |
| 285 | result &= mask; |
| 286 | if (result == done) |
| 287 | return 0; |
| 288 | udelay (1); |
| 289 | usec--; |
| 290 | } while (usec > 0); |
| 291 | return -ETIMEDOUT; |
| 292 | } |
| 293 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 294 | static const struct usb_ep_ops net2280_ep_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | |
| 296 | static void ep_reset (struct net2280_regs __iomem *regs, struct net2280_ep *ep) |
| 297 | { |
| 298 | u32 tmp; |
| 299 | |
| 300 | ep->desc = NULL; |
| 301 | INIT_LIST_HEAD (&ep->queue); |
| 302 | |
| 303 | ep->ep.maxpacket = ~0; |
| 304 | ep->ep.ops = &net2280_ep_ops; |
| 305 | |
| 306 | /* disable the dma, irqs, endpoint... */ |
| 307 | if (ep->dma) { |
| 308 | writel (0, &ep->dma->dmactl); |
| 309 | writel ( (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) |
| 310 | | (1 << DMA_TRANSACTION_DONE_INTERRUPT) |
| 311 | | (1 << DMA_ABORT) |
| 312 | , &ep->dma->dmastat); |
| 313 | |
| 314 | tmp = readl (®s->pciirqenb0); |
| 315 | tmp &= ~(1 << ep->num); |
| 316 | writel (tmp, ®s->pciirqenb0); |
| 317 | } else { |
| 318 | tmp = readl (®s->pciirqenb1); |
| 319 | tmp &= ~(1 << (8 + ep->num)); /* completion */ |
| 320 | writel (tmp, ®s->pciirqenb1); |
| 321 | } |
| 322 | writel (0, &ep->regs->ep_irqenb); |
| 323 | |
| 324 | /* init to our chosen defaults, notably so that we NAK OUT |
| 325 | * packets until the driver queues a read (+note erratum 0112) |
| 326 | */ |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 327 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) { |
| 328 | tmp = (1 << SET_NAK_OUT_PACKETS_MODE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | | (1 << SET_NAK_OUT_PACKETS) |
| 330 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
| 331 | | (1 << CLEAR_INTERRUPT_MODE); |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 332 | } else { |
| 333 | /* added for 2282 */ |
| 334 | tmp = (1 << CLEAR_NAK_OUT_PACKETS_MODE) |
| 335 | | (1 << CLEAR_NAK_OUT_PACKETS) |
| 336 | | (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
| 337 | | (1 << CLEAR_INTERRUPT_MODE); |
| 338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
| 340 | if (ep->num != 0) { |
| 341 | tmp |= (1 << CLEAR_ENDPOINT_TOGGLE) |
| 342 | | (1 << CLEAR_ENDPOINT_HALT); |
| 343 | } |
| 344 | writel (tmp, &ep->regs->ep_rsp); |
| 345 | |
| 346 | /* scrub most status bits, and flush any fifo state */ |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 347 | if (ep->dev->pdev->device == 0x2280) |
| 348 | tmp = (1 << FIFO_OVERFLOW) |
| 349 | | (1 << FIFO_UNDERFLOW); |
| 350 | else |
| 351 | tmp = 0; |
| 352 | |
| 353 | writel (tmp | (1 << TIMEOUT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | | (1 << USB_STALL_SENT) |
| 355 | | (1 << USB_IN_NAK_SENT) |
| 356 | | (1 << USB_IN_ACK_RCVD) |
| 357 | | (1 << USB_OUT_PING_NAK_SENT) |
| 358 | | (1 << USB_OUT_ACK_SENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | | (1 << FIFO_FLUSH) |
| 360 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
| 361 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
| 362 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| 363 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
| 364 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 365 | | (1 << DATA_IN_TOKEN_INTERRUPT) |
| 366 | , &ep->regs->ep_stat); |
| 367 | |
| 368 | /* fifo size is handled separately */ |
| 369 | } |
| 370 | |
| 371 | static void nuke (struct net2280_ep *); |
| 372 | |
| 373 | static int net2280_disable (struct usb_ep *_ep) |
| 374 | { |
| 375 | struct net2280_ep *ep; |
| 376 | unsigned long flags; |
| 377 | |
| 378 | ep = container_of (_ep, struct net2280_ep, ep); |
| 379 | if (!_ep || !ep->desc || _ep->name == ep0name) |
| 380 | return -EINVAL; |
| 381 | |
| 382 | spin_lock_irqsave (&ep->dev->lock, flags); |
| 383 | nuke (ep); |
| 384 | ep_reset (ep->dev->regs, ep); |
| 385 | |
| 386 | VDEBUG (ep->dev, "disabled %s %s\n", |
| 387 | ep->dma ? "dma" : "pio", _ep->name); |
| 388 | |
| 389 | /* synch memory views with the device */ |
| 390 | (void) readl (&ep->regs->ep_cfg); |
| 391 | |
| 392 | if (use_dma && !ep->dma && ep->num >= 1 && ep->num <= 4) |
| 393 | ep->dma = &ep->dev->dma [ep->num - 1]; |
| 394 | |
| 395 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
| 396 | return 0; |
| 397 | } |
| 398 | |
| 399 | /*-------------------------------------------------------------------------*/ |
| 400 | |
| 401 | static struct usb_request * |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 402 | net2280_alloc_request (struct usb_ep *_ep, gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | { |
| 404 | struct net2280_ep *ep; |
| 405 | struct net2280_request *req; |
| 406 | |
| 407 | if (!_ep) |
| 408 | return NULL; |
| 409 | ep = container_of (_ep, struct net2280_ep, ep); |
| 410 | |
Eric Sesterhenn | 7039f42 | 2006-02-27 13:34:10 -0800 | [diff] [blame] | 411 | req = kzalloc(sizeof(*req), gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | if (!req) |
| 413 | return NULL; |
| 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | req->req.dma = DMA_ADDR_INVALID; |
| 416 | INIT_LIST_HEAD (&req->queue); |
| 417 | |
| 418 | /* this dma descriptor may be swapped with the previous dummy */ |
| 419 | if (ep->dma) { |
| 420 | struct net2280_dma *td; |
| 421 | |
| 422 | td = pci_pool_alloc (ep->dev->requests, gfp_flags, |
| 423 | &req->td_dma); |
| 424 | if (!td) { |
| 425 | kfree (req); |
| 426 | return NULL; |
| 427 | } |
| 428 | td->dmacount = 0; /* not VALID */ |
| 429 | td->dmaaddr = __constant_cpu_to_le32 (DMA_ADDR_INVALID); |
| 430 | td->dmadesc = td->dmaaddr; |
| 431 | req->td = td; |
| 432 | } |
| 433 | return &req->req; |
| 434 | } |
| 435 | |
| 436 | static void |
| 437 | net2280_free_request (struct usb_ep *_ep, struct usb_request *_req) |
| 438 | { |
| 439 | struct net2280_ep *ep; |
| 440 | struct net2280_request *req; |
| 441 | |
| 442 | ep = container_of (_ep, struct net2280_ep, ep); |
| 443 | if (!_ep || !_req) |
| 444 | return; |
| 445 | |
| 446 | req = container_of (_req, struct net2280_request, req); |
| 447 | WARN_ON (!list_empty (&req->queue)); |
| 448 | if (req->td) |
| 449 | pci_pool_free (ep->dev->requests, req->td, req->td_dma); |
| 450 | kfree (req); |
| 451 | } |
| 452 | |
| 453 | /*-------------------------------------------------------------------------*/ |
| 454 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 455 | /* |
| 456 | * dma-coherent memory allocation (for dma-capable endpoints) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | * |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 458 | * NOTE: the dma_*_coherent() API calls suck. Most implementations are |
| 459 | * (a) page-oriented, so small buffers lose big; and (b) asymmetric with |
| 460 | * respect to calls with irqs disabled: alloc is safe, free is not. |
| 461 | * We currently work around (b), but not (a). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | static void * |
| 465 | net2280_alloc_buffer ( |
| 466 | struct usb_ep *_ep, |
| 467 | unsigned bytes, |
| 468 | dma_addr_t *dma, |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 469 | gfp_t gfp_flags |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | ) |
| 471 | { |
| 472 | void *retval; |
| 473 | struct net2280_ep *ep; |
| 474 | |
| 475 | ep = container_of (_ep, struct net2280_ep, ep); |
| 476 | if (!_ep) |
| 477 | return NULL; |
| 478 | *dma = DMA_ADDR_INVALID; |
| 479 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 480 | if (ep->dma) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | retval = dma_alloc_coherent(&ep->dev->pdev->dev, |
| 482 | bytes, dma, gfp_flags); |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 483 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | retval = kmalloc(bytes, gfp_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | return retval; |
| 486 | } |
| 487 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 488 | static DEFINE_SPINLOCK(buflock); |
| 489 | static LIST_HEAD(buffers); |
| 490 | |
| 491 | struct free_record { |
| 492 | struct list_head list; |
| 493 | struct device *dev; |
| 494 | unsigned bytes; |
| 495 | dma_addr_t dma; |
| 496 | }; |
| 497 | |
| 498 | static void do_free(unsigned long ignored) |
| 499 | { |
| 500 | spin_lock_irq(&buflock); |
| 501 | while (!list_empty(&buffers)) { |
| 502 | struct free_record *buf; |
| 503 | |
| 504 | buf = list_entry(buffers.next, struct free_record, list); |
| 505 | list_del(&buf->list); |
| 506 | spin_unlock_irq(&buflock); |
| 507 | |
| 508 | dma_free_coherent(buf->dev, buf->bytes, buf, buf->dma); |
| 509 | |
| 510 | spin_lock_irq(&buflock); |
| 511 | } |
| 512 | spin_unlock_irq(&buflock); |
| 513 | } |
| 514 | |
| 515 | static DECLARE_TASKLET(deferred_free, do_free, 0); |
| 516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | static void |
| 518 | net2280_free_buffer ( |
| 519 | struct usb_ep *_ep, |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 520 | void *address, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | dma_addr_t dma, |
| 522 | unsigned bytes |
| 523 | ) { |
| 524 | /* free memory into the right allocator */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | if (dma != DMA_ADDR_INVALID) { |
| 526 | struct net2280_ep *ep; |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 527 | struct free_record *buf = address; |
| 528 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | |
| 530 | ep = container_of(_ep, struct net2280_ep, ep); |
| 531 | if (!_ep) |
| 532 | return; |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 533 | |
| 534 | ep = container_of (_ep, struct net2280_ep, ep); |
| 535 | buf->dev = &ep->dev->pdev->dev; |
| 536 | buf->bytes = bytes; |
| 537 | buf->dma = dma; |
| 538 | |
| 539 | spin_lock_irqsave(&buflock, flags); |
| 540 | list_add_tail(&buf->list, &buffers); |
| 541 | tasklet_schedule(&deferred_free); |
| 542 | spin_unlock_irqrestore(&buflock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } else |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 544 | kfree (address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | /*-------------------------------------------------------------------------*/ |
| 548 | |
| 549 | /* load a packet into the fifo we use for usb IN transfers. |
| 550 | * works for all endpoints. |
| 551 | * |
| 552 | * NOTE: pio with ep-a..ep-d could stuff multiple packets into the fifo |
| 553 | * at a time, but this code is simpler because it knows it only writes |
| 554 | * one packet. ep-a..ep-d should use dma instead. |
| 555 | */ |
| 556 | static void |
| 557 | write_fifo (struct net2280_ep *ep, struct usb_request *req) |
| 558 | { |
| 559 | struct net2280_ep_regs __iomem *regs = ep->regs; |
| 560 | u8 *buf; |
| 561 | u32 tmp; |
| 562 | unsigned count, total; |
| 563 | |
| 564 | /* INVARIANT: fifo is currently empty. (testable) */ |
| 565 | |
| 566 | if (req) { |
| 567 | buf = req->buf + req->actual; |
| 568 | prefetch (buf); |
| 569 | total = req->length - req->actual; |
| 570 | } else { |
| 571 | total = 0; |
| 572 | buf = NULL; |
| 573 | } |
| 574 | |
| 575 | /* write just one packet at a time */ |
| 576 | count = ep->ep.maxpacket; |
| 577 | if (count > total) /* min() cannot be used on a bitfield */ |
| 578 | count = total; |
| 579 | |
| 580 | VDEBUG (ep->dev, "write %s fifo (IN) %d bytes%s req %p\n", |
| 581 | ep->ep.name, count, |
| 582 | (count != ep->ep.maxpacket) ? " (short)" : "", |
| 583 | req); |
| 584 | while (count >= 4) { |
| 585 | /* NOTE be careful if you try to align these. fifo lines |
| 586 | * should normally be full (4 bytes) and successive partial |
| 587 | * lines are ok only in certain cases. |
| 588 | */ |
| 589 | tmp = get_unaligned ((u32 *)buf); |
| 590 | cpu_to_le32s (&tmp); |
| 591 | writel (tmp, ®s->ep_data); |
| 592 | buf += 4; |
| 593 | count -= 4; |
| 594 | } |
| 595 | |
| 596 | /* last fifo entry is "short" unless we wrote a full packet. |
| 597 | * also explicitly validate last word in (periodic) transfers |
| 598 | * when maxpacket is not a multiple of 4 bytes. |
| 599 | */ |
| 600 | if (count || total < ep->ep.maxpacket) { |
| 601 | tmp = count ? get_unaligned ((u32 *)buf) : count; |
| 602 | cpu_to_le32s (&tmp); |
| 603 | set_fifo_bytecount (ep, count & 0x03); |
| 604 | writel (tmp, ®s->ep_data); |
| 605 | } |
| 606 | |
| 607 | /* pci writes may still be posted */ |
| 608 | } |
| 609 | |
| 610 | /* work around erratum 0106: PCI and USB race over the OUT fifo. |
| 611 | * caller guarantees chiprev 0100, out endpoint is NAKing, and |
| 612 | * there's no real data in the fifo. |
| 613 | * |
| 614 | * NOTE: also used in cases where that erratum doesn't apply: |
| 615 | * where the host wrote "too much" data to us. |
| 616 | */ |
| 617 | static void out_flush (struct net2280_ep *ep) |
| 618 | { |
| 619 | u32 __iomem *statp; |
| 620 | u32 tmp; |
| 621 | |
| 622 | ASSERT_OUT_NAKING (ep); |
| 623 | |
| 624 | statp = &ep->regs->ep_stat; |
| 625 | writel ( (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 626 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| 627 | , statp); |
| 628 | writel ((1 << FIFO_FLUSH), statp); |
| 629 | mb (); |
| 630 | tmp = readl (statp); |
| 631 | if (tmp & (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 632 | /* high speed did bulk NYET; fifo isn't filling */ |
| 633 | && ep->dev->gadget.speed == USB_SPEED_FULL) { |
| 634 | unsigned usec; |
| 635 | |
| 636 | usec = 50; /* 64 byte bulk/interrupt */ |
| 637 | handshake (statp, (1 << USB_OUT_PING_NAK_SENT), |
| 638 | (1 << USB_OUT_PING_NAK_SENT), usec); |
| 639 | /* NAK done; now CLEAR_NAK_OUT_PACKETS is safe */ |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | /* unload packet(s) from the fifo we use for usb OUT transfers. |
| 644 | * returns true iff the request completed, because of short packet |
| 645 | * or the request buffer having filled with full packets. |
| 646 | * |
| 647 | * for ep-a..ep-d this will read multiple packets out when they |
| 648 | * have been accepted. |
| 649 | */ |
| 650 | static int |
| 651 | read_fifo (struct net2280_ep *ep, struct net2280_request *req) |
| 652 | { |
| 653 | struct net2280_ep_regs __iomem *regs = ep->regs; |
| 654 | u8 *buf = req->req.buf + req->req.actual; |
| 655 | unsigned count, tmp, is_short; |
| 656 | unsigned cleanup = 0, prevent = 0; |
| 657 | |
| 658 | /* erratum 0106 ... packets coming in during fifo reads might |
| 659 | * be incompletely rejected. not all cases have workarounds. |
| 660 | */ |
| 661 | if (ep->dev->chiprev == 0x0100 |
| 662 | && ep->dev->gadget.speed == USB_SPEED_FULL) { |
| 663 | udelay (1); |
| 664 | tmp = readl (&ep->regs->ep_stat); |
| 665 | if ((tmp & (1 << NAK_OUT_PACKETS))) |
| 666 | cleanup = 1; |
| 667 | else if ((tmp & (1 << FIFO_FULL))) { |
| 668 | start_out_naking (ep); |
| 669 | prevent = 1; |
| 670 | } |
| 671 | /* else: hope we don't see the problem */ |
| 672 | } |
| 673 | |
| 674 | /* never overflow the rx buffer. the fifo reads packets until |
| 675 | * it sees a short one; we might not be ready for them all. |
| 676 | */ |
| 677 | prefetchw (buf); |
| 678 | count = readl (®s->ep_avail); |
| 679 | if (unlikely (count == 0)) { |
| 680 | udelay (1); |
| 681 | tmp = readl (&ep->regs->ep_stat); |
| 682 | count = readl (®s->ep_avail); |
| 683 | /* handled that data already? */ |
| 684 | if (count == 0 && (tmp & (1 << NAK_OUT_PACKETS)) == 0) |
| 685 | return 0; |
| 686 | } |
| 687 | |
| 688 | tmp = req->req.length - req->req.actual; |
| 689 | if (count > tmp) { |
| 690 | /* as with DMA, data overflow gets flushed */ |
| 691 | if ((tmp % ep->ep.maxpacket) != 0) { |
| 692 | ERROR (ep->dev, |
| 693 | "%s out fifo %d bytes, expected %d\n", |
| 694 | ep->ep.name, count, tmp); |
| 695 | req->req.status = -EOVERFLOW; |
| 696 | cleanup = 1; |
| 697 | /* NAK_OUT_PACKETS will be set, so flushing is safe; |
| 698 | * the next read will start with the next packet |
| 699 | */ |
| 700 | } /* else it's a ZLP, no worries */ |
| 701 | count = tmp; |
| 702 | } |
| 703 | req->req.actual += count; |
| 704 | |
| 705 | is_short = (count == 0) || ((count % ep->ep.maxpacket) != 0); |
| 706 | |
| 707 | VDEBUG (ep->dev, "read %s fifo (OUT) %d bytes%s%s%s req %p %d/%d\n", |
| 708 | ep->ep.name, count, is_short ? " (short)" : "", |
| 709 | cleanup ? " flush" : "", prevent ? " nak" : "", |
| 710 | req, req->req.actual, req->req.length); |
| 711 | |
| 712 | while (count >= 4) { |
| 713 | tmp = readl (®s->ep_data); |
| 714 | cpu_to_le32s (&tmp); |
| 715 | put_unaligned (tmp, (u32 *)buf); |
| 716 | buf += 4; |
| 717 | count -= 4; |
| 718 | } |
| 719 | if (count) { |
| 720 | tmp = readl (®s->ep_data); |
| 721 | /* LE conversion is implicit here: */ |
| 722 | do { |
| 723 | *buf++ = (u8) tmp; |
| 724 | tmp >>= 8; |
| 725 | } while (--count); |
| 726 | } |
| 727 | if (cleanup) |
| 728 | out_flush (ep); |
| 729 | if (prevent) { |
| 730 | writel ((1 << CLEAR_NAK_OUT_PACKETS), &ep->regs->ep_rsp); |
| 731 | (void) readl (&ep->regs->ep_rsp); |
| 732 | } |
| 733 | |
| 734 | return is_short || ((req->req.actual == req->req.length) |
| 735 | && !req->req.zero); |
| 736 | } |
| 737 | |
| 738 | /* fill out dma descriptor to match a given request */ |
| 739 | static void |
| 740 | fill_dma_desc (struct net2280_ep *ep, struct net2280_request *req, int valid) |
| 741 | { |
| 742 | struct net2280_dma *td = req->td; |
| 743 | u32 dmacount = req->req.length; |
| 744 | |
| 745 | /* don't let DMA continue after a short OUT packet, |
| 746 | * so overruns can't affect the next transfer. |
| 747 | * in case of overruns on max-size packets, we can't |
| 748 | * stop the fifo from filling but we can flush it. |
| 749 | */ |
| 750 | if (ep->is_in) |
| 751 | dmacount |= (1 << DMA_DIRECTION); |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 752 | if ((!ep->is_in && (dmacount % ep->ep.maxpacket) != 0) |
| 753 | || ep->dev->pdev->device != 0x2280) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | dmacount |= (1 << END_OF_CHAIN); |
| 755 | |
| 756 | req->valid = valid; |
| 757 | if (valid) |
| 758 | dmacount |= (1 << VALID_BIT); |
| 759 | if (likely(!req->req.no_interrupt || !use_dma_chaining)) |
| 760 | dmacount |= (1 << DMA_DONE_INTERRUPT_ENABLE); |
| 761 | |
| 762 | /* td->dmadesc = previously set by caller */ |
| 763 | td->dmaaddr = cpu_to_le32 (req->req.dma); |
| 764 | |
| 765 | /* 2280 may be polling VALID_BIT through ep->dma->dmadesc */ |
| 766 | wmb (); |
| 767 | td->dmacount = cpu_to_le32p (&dmacount); |
| 768 | } |
| 769 | |
| 770 | static const u32 dmactl_default = |
| 771 | (1 << DMA_SCATTER_GATHER_DONE_INTERRUPT) |
| 772 | | (1 << DMA_CLEAR_COUNT_ENABLE) |
| 773 | /* erratum 0116 workaround part 1 (use POLLING) */ |
| 774 | | (POLL_100_USEC << DESCRIPTOR_POLLING_RATE) |
| 775 | | (1 << DMA_VALID_BIT_POLLING_ENABLE) |
| 776 | | (1 << DMA_VALID_BIT_ENABLE) |
| 777 | | (1 << DMA_SCATTER_GATHER_ENABLE) |
| 778 | /* erratum 0116 workaround part 2 (no AUTOSTART) */ |
| 779 | | (1 << DMA_ENABLE); |
| 780 | |
| 781 | static inline void spin_stop_dma (struct net2280_dma_regs __iomem *dma) |
| 782 | { |
| 783 | handshake (&dma->dmactl, (1 << DMA_ENABLE), 0, 50); |
| 784 | } |
| 785 | |
| 786 | static inline void stop_dma (struct net2280_dma_regs __iomem *dma) |
| 787 | { |
| 788 | writel (readl (&dma->dmactl) & ~(1 << DMA_ENABLE), &dma->dmactl); |
| 789 | spin_stop_dma (dma); |
| 790 | } |
| 791 | |
| 792 | static void start_queue (struct net2280_ep *ep, u32 dmactl, u32 td_dma) |
| 793 | { |
| 794 | struct net2280_dma_regs __iomem *dma = ep->dma; |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 795 | unsigned int tmp = (1 << VALID_BIT) | (ep->is_in << DMA_DIRECTION); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 796 | |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 797 | if (ep->dev->pdev->device != 0x2280) |
| 798 | tmp |= (1 << END_OF_CHAIN); |
| 799 | |
| 800 | writel (tmp, &dma->dmacount); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | writel (readl (&dma->dmastat), &dma->dmastat); |
| 802 | |
| 803 | writel (td_dma, &dma->dmadesc); |
| 804 | writel (dmactl, &dma->dmactl); |
| 805 | |
| 806 | /* erratum 0116 workaround part 3: pci arbiter away from net2280 */ |
| 807 | (void) readl (&ep->dev->pci->pcimstctl); |
| 808 | |
| 809 | writel ((1 << DMA_START), &dma->dmastat); |
| 810 | |
| 811 | if (!ep->is_in) |
| 812 | stop_out_naking (ep); |
| 813 | } |
| 814 | |
| 815 | static void start_dma (struct net2280_ep *ep, struct net2280_request *req) |
| 816 | { |
| 817 | u32 tmp; |
| 818 | struct net2280_dma_regs __iomem *dma = ep->dma; |
| 819 | |
| 820 | /* FIXME can't use DMA for ZLPs */ |
| 821 | |
| 822 | /* on this path we "know" there's no dma active (yet) */ |
| 823 | WARN_ON (readl (&dma->dmactl) & (1 << DMA_ENABLE)); |
| 824 | writel (0, &ep->dma->dmactl); |
| 825 | |
| 826 | /* previous OUT packet might have been short */ |
| 827 | if (!ep->is_in && ((tmp = readl (&ep->regs->ep_stat)) |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 828 | & (1 << NAK_OUT_PACKETS)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | writel ((1 << SHORT_PACKET_TRANSFERRED_INTERRUPT), |
| 830 | &ep->regs->ep_stat); |
| 831 | |
| 832 | tmp = readl (&ep->regs->ep_avail); |
| 833 | if (tmp) { |
| 834 | writel (readl (&dma->dmastat), &dma->dmastat); |
| 835 | |
| 836 | /* transfer all/some fifo data */ |
| 837 | writel (req->req.dma, &dma->dmaaddr); |
| 838 | tmp = min (tmp, req->req.length); |
| 839 | |
| 840 | /* dma irq, faking scatterlist status */ |
| 841 | req->td->dmacount = cpu_to_le32 (req->req.length - tmp); |
| 842 | writel ((1 << DMA_DONE_INTERRUPT_ENABLE) |
| 843 | | tmp, &dma->dmacount); |
| 844 | req->td->dmadesc = 0; |
| 845 | req->valid = 1; |
| 846 | |
| 847 | writel ((1 << DMA_ENABLE), &dma->dmactl); |
| 848 | writel ((1 << DMA_START), &dma->dmastat); |
| 849 | return; |
| 850 | } |
| 851 | } |
| 852 | |
| 853 | tmp = dmactl_default; |
| 854 | |
| 855 | /* force packet boundaries between dma requests, but prevent the |
| 856 | * controller from automagically writing a last "short" packet |
| 857 | * (zero length) unless the driver explicitly said to do that. |
| 858 | */ |
| 859 | if (ep->is_in) { |
| 860 | if (likely ((req->req.length % ep->ep.maxpacket) != 0 |
| 861 | || req->req.zero)) { |
| 862 | tmp |= (1 << DMA_FIFO_VALIDATE); |
| 863 | ep->in_fifo_validate = 1; |
| 864 | } else |
| 865 | ep->in_fifo_validate = 0; |
| 866 | } |
| 867 | |
| 868 | /* init req->td, pointing to the current dummy */ |
| 869 | req->td->dmadesc = cpu_to_le32 (ep->td_dma); |
| 870 | fill_dma_desc (ep, req, 1); |
| 871 | |
| 872 | if (!use_dma_chaining) |
| 873 | req->td->dmacount |= __constant_cpu_to_le32 (1 << END_OF_CHAIN); |
| 874 | |
| 875 | start_queue (ep, tmp, req->td_dma); |
| 876 | } |
| 877 | |
| 878 | static inline void |
| 879 | queue_dma (struct net2280_ep *ep, struct net2280_request *req, int valid) |
| 880 | { |
| 881 | struct net2280_dma *end; |
| 882 | dma_addr_t tmp; |
| 883 | |
| 884 | /* swap new dummy for old, link; fill and maybe activate */ |
| 885 | end = ep->dummy; |
| 886 | ep->dummy = req->td; |
| 887 | req->td = end; |
| 888 | |
| 889 | tmp = ep->td_dma; |
| 890 | ep->td_dma = req->td_dma; |
| 891 | req->td_dma = tmp; |
| 892 | |
| 893 | end->dmadesc = cpu_to_le32 (ep->td_dma); |
| 894 | |
| 895 | fill_dma_desc (ep, req, valid); |
| 896 | } |
| 897 | |
| 898 | static void |
| 899 | done (struct net2280_ep *ep, struct net2280_request *req, int status) |
| 900 | { |
| 901 | struct net2280 *dev; |
| 902 | unsigned stopped = ep->stopped; |
| 903 | |
| 904 | list_del_init (&req->queue); |
| 905 | |
| 906 | if (req->req.status == -EINPROGRESS) |
| 907 | req->req.status = status; |
| 908 | else |
| 909 | status = req->req.status; |
| 910 | |
| 911 | dev = ep->dev; |
| 912 | if (req->mapped) { |
| 913 | pci_unmap_single (dev->pdev, req->req.dma, req->req.length, |
| 914 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
| 915 | req->req.dma = DMA_ADDR_INVALID; |
| 916 | req->mapped = 0; |
| 917 | } |
| 918 | |
| 919 | if (status && status != -ESHUTDOWN) |
| 920 | VDEBUG (dev, "complete %s req %p stat %d len %u/%u\n", |
| 921 | ep->ep.name, &req->req, status, |
| 922 | req->req.actual, req->req.length); |
| 923 | |
| 924 | /* don't modify queue heads during completion callback */ |
| 925 | ep->stopped = 1; |
| 926 | spin_unlock (&dev->lock); |
| 927 | req->req.complete (&ep->ep, &req->req); |
| 928 | spin_lock (&dev->lock); |
| 929 | ep->stopped = stopped; |
| 930 | } |
| 931 | |
| 932 | /*-------------------------------------------------------------------------*/ |
| 933 | |
| 934 | static int |
Al Viro | 55016f1 | 2005-10-21 03:21:58 -0400 | [diff] [blame] | 935 | net2280_queue (struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | { |
| 937 | struct net2280_request *req; |
| 938 | struct net2280_ep *ep; |
| 939 | struct net2280 *dev; |
| 940 | unsigned long flags; |
| 941 | |
| 942 | /* we always require a cpu-view buffer, so that we can |
| 943 | * always use pio (as fallback or whatever). |
| 944 | */ |
| 945 | req = container_of (_req, struct net2280_request, req); |
| 946 | if (!_req || !_req->complete || !_req->buf |
| 947 | || !list_empty (&req->queue)) |
| 948 | return -EINVAL; |
| 949 | if (_req->length > (~0 & DMA_BYTE_COUNT_MASK)) |
| 950 | return -EDOM; |
| 951 | ep = container_of (_ep, struct net2280_ep, ep); |
| 952 | if (!_ep || (!ep->desc && ep->num != 0)) |
| 953 | return -EINVAL; |
| 954 | dev = ep->dev; |
| 955 | if (!dev->driver || dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 956 | return -ESHUTDOWN; |
| 957 | |
| 958 | /* FIXME implement PIO fallback for ZLPs with DMA */ |
| 959 | if (ep->dma && _req->length == 0) |
| 960 | return -EOPNOTSUPP; |
| 961 | |
| 962 | /* set up dma mapping in case the caller didn't */ |
| 963 | if (ep->dma && _req->dma == DMA_ADDR_INVALID) { |
| 964 | _req->dma = pci_map_single (dev->pdev, _req->buf, _req->length, |
| 965 | ep->is_in ? PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); |
| 966 | req->mapped = 1; |
| 967 | } |
| 968 | |
| 969 | #if 0 |
| 970 | VDEBUG (dev, "%s queue req %p, len %d buf %p\n", |
| 971 | _ep->name, _req, _req->length, _req->buf); |
| 972 | #endif |
| 973 | |
| 974 | spin_lock_irqsave (&dev->lock, flags); |
| 975 | |
| 976 | _req->status = -EINPROGRESS; |
| 977 | _req->actual = 0; |
| 978 | |
| 979 | /* kickstart this i/o queue? */ |
| 980 | if (list_empty (&ep->queue) && !ep->stopped) { |
| 981 | /* use DMA if the endpoint supports it, else pio */ |
| 982 | if (ep->dma) |
| 983 | start_dma (ep, req); |
| 984 | else { |
| 985 | /* maybe there's no control data, just status ack */ |
| 986 | if (ep->num == 0 && _req->length == 0) { |
| 987 | allow_status (ep); |
| 988 | done (ep, req, 0); |
| 989 | VDEBUG (dev, "%s status ack\n", ep->ep.name); |
| 990 | goto done; |
| 991 | } |
| 992 | |
| 993 | /* PIO ... stuff the fifo, or unblock it. */ |
| 994 | if (ep->is_in) |
| 995 | write_fifo (ep, _req); |
| 996 | else if (list_empty (&ep->queue)) { |
| 997 | u32 s; |
| 998 | |
| 999 | /* OUT FIFO might have packet(s) buffered */ |
| 1000 | s = readl (&ep->regs->ep_stat); |
| 1001 | if ((s & (1 << FIFO_EMPTY)) == 0) { |
| 1002 | /* note: _req->short_not_ok is |
| 1003 | * ignored here since PIO _always_ |
| 1004 | * stops queue advance here, and |
| 1005 | * _req->status doesn't change for |
| 1006 | * short reads (only _req->actual) |
| 1007 | */ |
| 1008 | if (read_fifo (ep, req)) { |
| 1009 | done (ep, req, 0); |
| 1010 | if (ep->num == 0) |
| 1011 | allow_status (ep); |
| 1012 | /* don't queue it */ |
| 1013 | req = NULL; |
| 1014 | } else |
| 1015 | s = readl (&ep->regs->ep_stat); |
| 1016 | } |
| 1017 | |
| 1018 | /* don't NAK, let the fifo fill */ |
| 1019 | if (req && (s & (1 << NAK_OUT_PACKETS))) |
| 1020 | writel ((1 << CLEAR_NAK_OUT_PACKETS), |
| 1021 | &ep->regs->ep_rsp); |
| 1022 | } |
| 1023 | } |
| 1024 | |
| 1025 | } else if (ep->dma) { |
| 1026 | int valid = 1; |
| 1027 | |
| 1028 | if (ep->is_in) { |
| 1029 | int expect; |
| 1030 | |
| 1031 | /* preventing magic zlps is per-engine state, not |
| 1032 | * per-transfer; irq logic must recover hiccups. |
| 1033 | */ |
| 1034 | expect = likely (req->req.zero |
| 1035 | || (req->req.length % ep->ep.maxpacket) != 0); |
| 1036 | if (expect != ep->in_fifo_validate) |
| 1037 | valid = 0; |
| 1038 | } |
| 1039 | queue_dma (ep, req, valid); |
| 1040 | |
| 1041 | } /* else the irq handler advances the queue. */ |
| 1042 | |
Alan Stern | 1f26e28 | 2006-11-16 10:16:00 -0500 | [diff] [blame] | 1043 | ep->responded = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | if (req) |
| 1045 | list_add_tail (&req->queue, &ep->queue); |
| 1046 | done: |
| 1047 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1048 | |
| 1049 | /* pci writes may still be posted */ |
| 1050 | return 0; |
| 1051 | } |
| 1052 | |
| 1053 | static inline void |
| 1054 | dma_done ( |
| 1055 | struct net2280_ep *ep, |
| 1056 | struct net2280_request *req, |
| 1057 | u32 dmacount, |
| 1058 | int status |
| 1059 | ) |
| 1060 | { |
| 1061 | req->req.actual = req->req.length - (DMA_BYTE_COUNT_MASK & dmacount); |
| 1062 | done (ep, req, status); |
| 1063 | } |
| 1064 | |
| 1065 | static void restart_dma (struct net2280_ep *ep); |
| 1066 | |
| 1067 | static void scan_dma_completions (struct net2280_ep *ep) |
| 1068 | { |
| 1069 | /* only look at descriptors that were "naturally" retired, |
| 1070 | * so fifo and list head state won't matter |
| 1071 | */ |
| 1072 | while (!list_empty (&ep->queue)) { |
| 1073 | struct net2280_request *req; |
| 1074 | u32 tmp; |
| 1075 | |
| 1076 | req = list_entry (ep->queue.next, |
| 1077 | struct net2280_request, queue); |
| 1078 | if (!req->valid) |
| 1079 | break; |
| 1080 | rmb (); |
| 1081 | tmp = le32_to_cpup (&req->td->dmacount); |
| 1082 | if ((tmp & (1 << VALID_BIT)) != 0) |
| 1083 | break; |
| 1084 | |
| 1085 | /* SHORT_PACKET_TRANSFERRED_INTERRUPT handles "usb-short" |
| 1086 | * cases where DMA must be aborted; this code handles |
| 1087 | * all non-abort DMA completions. |
| 1088 | */ |
| 1089 | if (unlikely (req->td->dmadesc == 0)) { |
| 1090 | /* paranoia */ |
| 1091 | tmp = readl (&ep->dma->dmacount); |
| 1092 | if (tmp & DMA_BYTE_COUNT_MASK) |
| 1093 | break; |
| 1094 | /* single transfer mode */ |
| 1095 | dma_done (ep, req, tmp, 0); |
| 1096 | break; |
| 1097 | } else if (!ep->is_in |
| 1098 | && (req->req.length % ep->ep.maxpacket) != 0) { |
| 1099 | tmp = readl (&ep->regs->ep_stat); |
| 1100 | |
| 1101 | /* AVOID TROUBLE HERE by not issuing short reads from |
| 1102 | * your gadget driver. That helps avoids errata 0121, |
| 1103 | * 0122, and 0124; not all cases trigger the warning. |
| 1104 | */ |
| 1105 | if ((tmp & (1 << NAK_OUT_PACKETS)) == 0) { |
| 1106 | WARN (ep->dev, "%s lost packet sync!\n", |
| 1107 | ep->ep.name); |
| 1108 | req->req.status = -EOVERFLOW; |
| 1109 | } else if ((tmp = readl (&ep->regs->ep_avail)) != 0) { |
| 1110 | /* fifo gets flushed later */ |
| 1111 | ep->out_overflow = 1; |
| 1112 | DEBUG (ep->dev, "%s dma, discard %d len %d\n", |
| 1113 | ep->ep.name, tmp, |
| 1114 | req->req.length); |
| 1115 | req->req.status = -EOVERFLOW; |
| 1116 | } |
| 1117 | } |
| 1118 | dma_done (ep, req, tmp, 0); |
| 1119 | } |
| 1120 | } |
| 1121 | |
| 1122 | static void restart_dma (struct net2280_ep *ep) |
| 1123 | { |
| 1124 | struct net2280_request *req; |
| 1125 | u32 dmactl = dmactl_default; |
| 1126 | |
| 1127 | if (ep->stopped) |
| 1128 | return; |
| 1129 | req = list_entry (ep->queue.next, struct net2280_request, queue); |
| 1130 | |
| 1131 | if (!use_dma_chaining) { |
| 1132 | start_dma (ep, req); |
| 1133 | return; |
| 1134 | } |
| 1135 | |
| 1136 | /* the 2280 will be processing the queue unless queue hiccups after |
| 1137 | * the previous transfer: |
| 1138 | * IN: wanted automagic zlp, head doesn't (or vice versa) |
| 1139 | * DMA_FIFO_VALIDATE doesn't init from dma descriptors. |
| 1140 | * OUT: was "usb-short", we must restart. |
| 1141 | */ |
| 1142 | if (ep->is_in && !req->valid) { |
| 1143 | struct net2280_request *entry, *prev = NULL; |
| 1144 | int reqmode, done = 0; |
| 1145 | |
| 1146 | DEBUG (ep->dev, "%s dma hiccup td %p\n", ep->ep.name, req->td); |
| 1147 | ep->in_fifo_validate = likely (req->req.zero |
| 1148 | || (req->req.length % ep->ep.maxpacket) != 0); |
| 1149 | if (ep->in_fifo_validate) |
| 1150 | dmactl |= (1 << DMA_FIFO_VALIDATE); |
| 1151 | list_for_each_entry (entry, &ep->queue, queue) { |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 1152 | __le32 dmacount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | |
| 1154 | if (entry == req) |
| 1155 | continue; |
| 1156 | dmacount = entry->td->dmacount; |
| 1157 | if (!done) { |
| 1158 | reqmode = likely (entry->req.zero |
| 1159 | || (entry->req.length |
| 1160 | % ep->ep.maxpacket) != 0); |
| 1161 | if (reqmode == ep->in_fifo_validate) { |
| 1162 | entry->valid = 1; |
| 1163 | dmacount |= valid_bit; |
| 1164 | entry->td->dmacount = dmacount; |
| 1165 | prev = entry; |
| 1166 | continue; |
| 1167 | } else { |
| 1168 | /* force a hiccup */ |
| 1169 | prev->td->dmacount |= dma_done_ie; |
| 1170 | done = 1; |
| 1171 | } |
| 1172 | } |
| 1173 | |
| 1174 | /* walk the rest of the queue so unlinks behave */ |
| 1175 | entry->valid = 0; |
| 1176 | dmacount &= ~valid_bit; |
| 1177 | entry->td->dmacount = dmacount; |
| 1178 | prev = entry; |
| 1179 | } |
| 1180 | } |
| 1181 | |
| 1182 | writel (0, &ep->dma->dmactl); |
| 1183 | start_queue (ep, dmactl, req->td_dma); |
| 1184 | } |
| 1185 | |
| 1186 | static void abort_dma (struct net2280_ep *ep) |
| 1187 | { |
| 1188 | /* abort the current transfer */ |
| 1189 | if (likely (!list_empty (&ep->queue))) { |
| 1190 | /* FIXME work around errata 0121, 0122, 0124 */ |
| 1191 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); |
| 1192 | spin_stop_dma (ep->dma); |
| 1193 | } else |
| 1194 | stop_dma (ep->dma); |
| 1195 | scan_dma_completions (ep); |
| 1196 | } |
| 1197 | |
| 1198 | /* dequeue ALL requests */ |
| 1199 | static void nuke (struct net2280_ep *ep) |
| 1200 | { |
| 1201 | struct net2280_request *req; |
| 1202 | |
| 1203 | /* called with spinlock held */ |
| 1204 | ep->stopped = 1; |
| 1205 | if (ep->dma) |
| 1206 | abort_dma (ep); |
| 1207 | while (!list_empty (&ep->queue)) { |
| 1208 | req = list_entry (ep->queue.next, |
| 1209 | struct net2280_request, |
| 1210 | queue); |
| 1211 | done (ep, req, -ESHUTDOWN); |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | /* dequeue JUST ONE request */ |
| 1216 | static int net2280_dequeue (struct usb_ep *_ep, struct usb_request *_req) |
| 1217 | { |
| 1218 | struct net2280_ep *ep; |
| 1219 | struct net2280_request *req; |
| 1220 | unsigned long flags; |
| 1221 | u32 dmactl; |
| 1222 | int stopped; |
| 1223 | |
| 1224 | ep = container_of (_ep, struct net2280_ep, ep); |
| 1225 | if (!_ep || (!ep->desc && ep->num != 0) || !_req) |
| 1226 | return -EINVAL; |
| 1227 | |
| 1228 | spin_lock_irqsave (&ep->dev->lock, flags); |
| 1229 | stopped = ep->stopped; |
| 1230 | |
| 1231 | /* quiesce dma while we patch the queue */ |
| 1232 | dmactl = 0; |
| 1233 | ep->stopped = 1; |
| 1234 | if (ep->dma) { |
| 1235 | dmactl = readl (&ep->dma->dmactl); |
| 1236 | /* WARNING erratum 0127 may kick in ... */ |
| 1237 | stop_dma (ep->dma); |
| 1238 | scan_dma_completions (ep); |
| 1239 | } |
| 1240 | |
| 1241 | /* make sure it's still queued on this endpoint */ |
| 1242 | list_for_each_entry (req, &ep->queue, queue) { |
| 1243 | if (&req->req == _req) |
| 1244 | break; |
| 1245 | } |
| 1246 | if (&req->req != _req) { |
| 1247 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
| 1248 | return -EINVAL; |
| 1249 | } |
| 1250 | |
| 1251 | /* queue head may be partially complete. */ |
| 1252 | if (ep->queue.next == &req->queue) { |
| 1253 | if (ep->dma) { |
| 1254 | DEBUG (ep->dev, "unlink (%s) dma\n", _ep->name); |
| 1255 | _req->status = -ECONNRESET; |
| 1256 | abort_dma (ep); |
| 1257 | if (likely (ep->queue.next == &req->queue)) { |
| 1258 | // NOTE: misreports single-transfer mode |
| 1259 | req->td->dmacount = 0; /* invalidate */ |
| 1260 | dma_done (ep, req, |
| 1261 | readl (&ep->dma->dmacount), |
| 1262 | -ECONNRESET); |
| 1263 | } |
| 1264 | } else { |
| 1265 | DEBUG (ep->dev, "unlink (%s) pio\n", _ep->name); |
| 1266 | done (ep, req, -ECONNRESET); |
| 1267 | } |
| 1268 | req = NULL; |
| 1269 | |
| 1270 | /* patch up hardware chaining data */ |
| 1271 | } else if (ep->dma && use_dma_chaining) { |
| 1272 | if (req->queue.prev == ep->queue.next) { |
| 1273 | writel (le32_to_cpu (req->td->dmadesc), |
| 1274 | &ep->dma->dmadesc); |
| 1275 | if (req->td->dmacount & dma_done_ie) |
| 1276 | writel (readl (&ep->dma->dmacount) |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 1277 | | le32_to_cpu(dma_done_ie), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1278 | &ep->dma->dmacount); |
| 1279 | } else { |
| 1280 | struct net2280_request *prev; |
| 1281 | |
| 1282 | prev = list_entry (req->queue.prev, |
| 1283 | struct net2280_request, queue); |
| 1284 | prev->td->dmadesc = req->td->dmadesc; |
| 1285 | if (req->td->dmacount & dma_done_ie) |
| 1286 | prev->td->dmacount |= dma_done_ie; |
| 1287 | } |
| 1288 | } |
| 1289 | |
| 1290 | if (req) |
| 1291 | done (ep, req, -ECONNRESET); |
| 1292 | ep->stopped = stopped; |
| 1293 | |
| 1294 | if (ep->dma) { |
| 1295 | /* turn off dma on inactive queues */ |
| 1296 | if (list_empty (&ep->queue)) |
| 1297 | stop_dma (ep->dma); |
| 1298 | else if (!ep->stopped) { |
| 1299 | /* resume current request, or start new one */ |
| 1300 | if (req) |
| 1301 | writel (dmactl, &ep->dma->dmactl); |
| 1302 | else |
| 1303 | start_dma (ep, list_entry (ep->queue.next, |
| 1304 | struct net2280_request, queue)); |
| 1305 | } |
| 1306 | } |
| 1307 | |
| 1308 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
| 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | /*-------------------------------------------------------------------------*/ |
| 1313 | |
| 1314 | static int net2280_fifo_status (struct usb_ep *_ep); |
| 1315 | |
| 1316 | static int |
| 1317 | net2280_set_halt (struct usb_ep *_ep, int value) |
| 1318 | { |
| 1319 | struct net2280_ep *ep; |
| 1320 | unsigned long flags; |
| 1321 | int retval = 0; |
| 1322 | |
| 1323 | ep = container_of (_ep, struct net2280_ep, ep); |
| 1324 | if (!_ep || (!ep->desc && ep->num != 0)) |
| 1325 | return -EINVAL; |
| 1326 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 1327 | return -ESHUTDOWN; |
| 1328 | if (ep->desc /* not ep0 */ && (ep->desc->bmAttributes & 0x03) |
| 1329 | == USB_ENDPOINT_XFER_ISOC) |
| 1330 | return -EINVAL; |
| 1331 | |
| 1332 | spin_lock_irqsave (&ep->dev->lock, flags); |
| 1333 | if (!list_empty (&ep->queue)) |
| 1334 | retval = -EAGAIN; |
| 1335 | else if (ep->is_in && value && net2280_fifo_status (_ep) != 0) |
| 1336 | retval = -EAGAIN; |
| 1337 | else { |
| 1338 | VDEBUG (ep->dev, "%s %s halt\n", _ep->name, |
| 1339 | value ? "set" : "clear"); |
| 1340 | /* set/clear, then synch memory views with the device */ |
| 1341 | if (value) { |
| 1342 | if (ep->num == 0) |
| 1343 | ep->dev->protocol_stall = 1; |
| 1344 | else |
| 1345 | set_halt (ep); |
| 1346 | } else |
| 1347 | clear_halt (ep); |
| 1348 | (void) readl (&ep->regs->ep_rsp); |
| 1349 | } |
| 1350 | spin_unlock_irqrestore (&ep->dev->lock, flags); |
| 1351 | |
| 1352 | return retval; |
| 1353 | } |
| 1354 | |
| 1355 | static int |
| 1356 | net2280_fifo_status (struct usb_ep *_ep) |
| 1357 | { |
| 1358 | struct net2280_ep *ep; |
| 1359 | u32 avail; |
| 1360 | |
| 1361 | ep = container_of (_ep, struct net2280_ep, ep); |
| 1362 | if (!_ep || (!ep->desc && ep->num != 0)) |
| 1363 | return -ENODEV; |
| 1364 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 1365 | return -ESHUTDOWN; |
| 1366 | |
| 1367 | avail = readl (&ep->regs->ep_avail) & ((1 << 12) - 1); |
| 1368 | if (avail > ep->fifo_size) |
| 1369 | return -EOVERFLOW; |
| 1370 | if (ep->is_in) |
| 1371 | avail = ep->fifo_size - avail; |
| 1372 | return avail; |
| 1373 | } |
| 1374 | |
| 1375 | static void |
| 1376 | net2280_fifo_flush (struct usb_ep *_ep) |
| 1377 | { |
| 1378 | struct net2280_ep *ep; |
| 1379 | |
| 1380 | ep = container_of (_ep, struct net2280_ep, ep); |
| 1381 | if (!_ep || (!ep->desc && ep->num != 0)) |
| 1382 | return; |
| 1383 | if (!ep->dev->driver || ep->dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 1384 | return; |
| 1385 | |
| 1386 | writel ((1 << FIFO_FLUSH), &ep->regs->ep_stat); |
| 1387 | (void) readl (&ep->regs->ep_rsp); |
| 1388 | } |
| 1389 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1390 | static const struct usb_ep_ops net2280_ep_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1391 | .enable = net2280_enable, |
| 1392 | .disable = net2280_disable, |
| 1393 | |
| 1394 | .alloc_request = net2280_alloc_request, |
| 1395 | .free_request = net2280_free_request, |
| 1396 | |
| 1397 | .alloc_buffer = net2280_alloc_buffer, |
| 1398 | .free_buffer = net2280_free_buffer, |
| 1399 | |
| 1400 | .queue = net2280_queue, |
| 1401 | .dequeue = net2280_dequeue, |
| 1402 | |
| 1403 | .set_halt = net2280_set_halt, |
| 1404 | .fifo_status = net2280_fifo_status, |
| 1405 | .fifo_flush = net2280_fifo_flush, |
| 1406 | }; |
| 1407 | |
| 1408 | /*-------------------------------------------------------------------------*/ |
| 1409 | |
| 1410 | static int net2280_get_frame (struct usb_gadget *_gadget) |
| 1411 | { |
| 1412 | struct net2280 *dev; |
| 1413 | unsigned long flags; |
| 1414 | u16 retval; |
| 1415 | |
| 1416 | if (!_gadget) |
| 1417 | return -ENODEV; |
| 1418 | dev = container_of (_gadget, struct net2280, gadget); |
| 1419 | spin_lock_irqsave (&dev->lock, flags); |
| 1420 | retval = get_idx_reg (dev->regs, REG_FRAME) & 0x03ff; |
| 1421 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1422 | return retval; |
| 1423 | } |
| 1424 | |
| 1425 | static int net2280_wakeup (struct usb_gadget *_gadget) |
| 1426 | { |
| 1427 | struct net2280 *dev; |
| 1428 | u32 tmp; |
| 1429 | unsigned long flags; |
| 1430 | |
| 1431 | if (!_gadget) |
| 1432 | return 0; |
| 1433 | dev = container_of (_gadget, struct net2280, gadget); |
| 1434 | |
| 1435 | spin_lock_irqsave (&dev->lock, flags); |
| 1436 | tmp = readl (&dev->usb->usbctl); |
| 1437 | if (tmp & (1 << DEVICE_REMOTE_WAKEUP_ENABLE)) |
| 1438 | writel (1 << GENERATE_RESUME, &dev->usb->usbstat); |
| 1439 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1440 | |
| 1441 | /* pci writes may still be posted */ |
| 1442 | return 0; |
| 1443 | } |
| 1444 | |
| 1445 | static int net2280_set_selfpowered (struct usb_gadget *_gadget, int value) |
| 1446 | { |
| 1447 | struct net2280 *dev; |
| 1448 | u32 tmp; |
| 1449 | unsigned long flags; |
| 1450 | |
| 1451 | if (!_gadget) |
| 1452 | return 0; |
| 1453 | dev = container_of (_gadget, struct net2280, gadget); |
| 1454 | |
| 1455 | spin_lock_irqsave (&dev->lock, flags); |
| 1456 | tmp = readl (&dev->usb->usbctl); |
| 1457 | if (value) |
| 1458 | tmp |= (1 << SELF_POWERED_STATUS); |
| 1459 | else |
| 1460 | tmp &= ~(1 << SELF_POWERED_STATUS); |
| 1461 | writel (tmp, &dev->usb->usbctl); |
| 1462 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1463 | |
| 1464 | return 0; |
| 1465 | } |
| 1466 | |
| 1467 | static int net2280_pullup(struct usb_gadget *_gadget, int is_on) |
| 1468 | { |
| 1469 | struct net2280 *dev; |
| 1470 | u32 tmp; |
| 1471 | unsigned long flags; |
| 1472 | |
| 1473 | if (!_gadget) |
| 1474 | return -ENODEV; |
| 1475 | dev = container_of (_gadget, struct net2280, gadget); |
| 1476 | |
| 1477 | spin_lock_irqsave (&dev->lock, flags); |
| 1478 | tmp = readl (&dev->usb->usbctl); |
| 1479 | dev->softconnect = (is_on != 0); |
| 1480 | if (is_on) |
| 1481 | tmp |= (1 << USB_DETECT_ENABLE); |
| 1482 | else |
| 1483 | tmp &= ~(1 << USB_DETECT_ENABLE); |
| 1484 | writel (tmp, &dev->usb->usbctl); |
| 1485 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1486 | |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | static const struct usb_gadget_ops net2280_ops = { |
| 1491 | .get_frame = net2280_get_frame, |
| 1492 | .wakeup = net2280_wakeup, |
| 1493 | .set_selfpowered = net2280_set_selfpowered, |
| 1494 | .pullup = net2280_pullup, |
| 1495 | }; |
| 1496 | |
| 1497 | /*-------------------------------------------------------------------------*/ |
| 1498 | |
| 1499 | #ifdef CONFIG_USB_GADGET_DEBUG_FILES |
| 1500 | |
| 1501 | /* FIXME move these into procfs, and use seq_file. |
| 1502 | * Sysfs _still_ doesn't behave for arbitrarily sized files, |
| 1503 | * and also doesn't help products using this with 2.4 kernels. |
| 1504 | */ |
| 1505 | |
| 1506 | /* "function" sysfs attribute */ |
| 1507 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1508 | show_function (struct device *_dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | { |
| 1510 | struct net2280 *dev = dev_get_drvdata (_dev); |
| 1511 | |
| 1512 | if (!dev->driver |
| 1513 | || !dev->driver->function |
| 1514 | || strlen (dev->driver->function) > PAGE_SIZE) |
| 1515 | return 0; |
| 1516 | return scnprintf (buf, PAGE_SIZE, "%s\n", dev->driver->function); |
| 1517 | } |
| 1518 | static DEVICE_ATTR (function, S_IRUGO, show_function, NULL); |
| 1519 | |
| 1520 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1521 | show_registers (struct device *_dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | { |
| 1523 | struct net2280 *dev; |
| 1524 | char *next; |
| 1525 | unsigned size, t; |
| 1526 | unsigned long flags; |
| 1527 | int i; |
| 1528 | u32 t1, t2; |
Andrew Morton | 30e6959 | 2005-06-26 17:18:46 -0700 | [diff] [blame] | 1529 | const char *s; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | |
| 1531 | dev = dev_get_drvdata (_dev); |
| 1532 | next = buf; |
| 1533 | size = PAGE_SIZE; |
| 1534 | spin_lock_irqsave (&dev->lock, flags); |
| 1535 | |
| 1536 | if (dev->driver) |
| 1537 | s = dev->driver->driver.name; |
| 1538 | else |
| 1539 | s = "(none)"; |
| 1540 | |
| 1541 | /* Main Control Registers */ |
| 1542 | t = scnprintf (next, size, "%s version " DRIVER_VERSION |
| 1543 | ", chiprev %04x, dma %s\n\n" |
| 1544 | "devinit %03x fifoctl %08x gadget '%s'\n" |
| 1545 | "pci irqenb0 %02x irqenb1 %08x " |
| 1546 | "irqstat0 %04x irqstat1 %08x\n", |
| 1547 | driver_name, dev->chiprev, |
| 1548 | use_dma |
| 1549 | ? (use_dma_chaining ? "chaining" : "enabled") |
| 1550 | : "disabled", |
| 1551 | readl (&dev->regs->devinit), |
| 1552 | readl (&dev->regs->fifoctl), |
| 1553 | s, |
| 1554 | readl (&dev->regs->pciirqenb0), |
| 1555 | readl (&dev->regs->pciirqenb1), |
| 1556 | readl (&dev->regs->irqstat0), |
| 1557 | readl (&dev->regs->irqstat1)); |
| 1558 | size -= t; |
| 1559 | next += t; |
| 1560 | |
| 1561 | /* USB Control Registers */ |
| 1562 | t1 = readl (&dev->usb->usbctl); |
| 1563 | t2 = readl (&dev->usb->usbstat); |
| 1564 | if (t1 & (1 << VBUS_PIN)) { |
| 1565 | if (t2 & (1 << HIGH_SPEED)) |
| 1566 | s = "high speed"; |
| 1567 | else if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 1568 | s = "powered"; |
| 1569 | else |
| 1570 | s = "full speed"; |
| 1571 | /* full speed bit (6) not working?? */ |
| 1572 | } else |
| 1573 | s = "not attached"; |
| 1574 | t = scnprintf (next, size, |
| 1575 | "stdrsp %08x usbctl %08x usbstat %08x " |
| 1576 | "addr 0x%02x (%s)\n", |
| 1577 | readl (&dev->usb->stdrsp), t1, t2, |
| 1578 | readl (&dev->usb->ouraddr), s); |
| 1579 | size -= t; |
| 1580 | next += t; |
| 1581 | |
| 1582 | /* PCI Master Control Registers */ |
| 1583 | |
| 1584 | /* DMA Control Registers */ |
| 1585 | |
| 1586 | /* Configurable EP Control Registers */ |
| 1587 | for (i = 0; i < 7; i++) { |
| 1588 | struct net2280_ep *ep; |
| 1589 | |
| 1590 | ep = &dev->ep [i]; |
| 1591 | if (i && !ep->desc) |
| 1592 | continue; |
| 1593 | |
| 1594 | t1 = readl (&ep->regs->ep_cfg); |
| 1595 | t2 = readl (&ep->regs->ep_rsp) & 0xff; |
| 1596 | t = scnprintf (next, size, |
| 1597 | "\n%s\tcfg %05x rsp (%02x) %s%s%s%s%s%s%s%s" |
| 1598 | "irqenb %02x\n", |
| 1599 | ep->ep.name, t1, t2, |
| 1600 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS)) |
| 1601 | ? "NAK " : "", |
| 1602 | (t2 & (1 << CLEAR_EP_HIDE_STATUS_PHASE)) |
| 1603 | ? "hide " : "", |
| 1604 | (t2 & (1 << CLEAR_EP_FORCE_CRC_ERROR)) |
| 1605 | ? "CRC " : "", |
| 1606 | (t2 & (1 << CLEAR_INTERRUPT_MODE)) |
| 1607 | ? "interrupt " : "", |
| 1608 | (t2 & (1<<CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE)) |
| 1609 | ? "status " : "", |
| 1610 | (t2 & (1 << CLEAR_NAK_OUT_PACKETS_MODE)) |
| 1611 | ? "NAKmode " : "", |
| 1612 | (t2 & (1 << CLEAR_ENDPOINT_TOGGLE)) |
| 1613 | ? "DATA1 " : "DATA0 ", |
| 1614 | (t2 & (1 << CLEAR_ENDPOINT_HALT)) |
| 1615 | ? "HALT " : "", |
| 1616 | readl (&ep->regs->ep_irqenb)); |
| 1617 | size -= t; |
| 1618 | next += t; |
| 1619 | |
| 1620 | t = scnprintf (next, size, |
| 1621 | "\tstat %08x avail %04x " |
| 1622 | "(ep%d%s-%s)%s\n", |
| 1623 | readl (&ep->regs->ep_stat), |
| 1624 | readl (&ep->regs->ep_avail), |
| 1625 | t1 & 0x0f, DIR_STRING (t1), |
| 1626 | type_string (t1 >> 8), |
| 1627 | ep->stopped ? "*" : ""); |
| 1628 | size -= t; |
| 1629 | next += t; |
| 1630 | |
| 1631 | if (!ep->dma) |
| 1632 | continue; |
| 1633 | |
| 1634 | t = scnprintf (next, size, |
| 1635 | " dma\tctl %08x stat %08x count %08x\n" |
| 1636 | "\taddr %08x desc %08x\n", |
| 1637 | readl (&ep->dma->dmactl), |
| 1638 | readl (&ep->dma->dmastat), |
| 1639 | readl (&ep->dma->dmacount), |
| 1640 | readl (&ep->dma->dmaaddr), |
| 1641 | readl (&ep->dma->dmadesc)); |
| 1642 | size -= t; |
| 1643 | next += t; |
| 1644 | |
| 1645 | } |
| 1646 | |
| 1647 | /* Indexed Registers */ |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1648 | // none yet |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1649 | |
| 1650 | /* Statistics */ |
| 1651 | t = scnprintf (next, size, "\nirqs: "); |
| 1652 | size -= t; |
| 1653 | next += t; |
| 1654 | for (i = 0; i < 7; i++) { |
| 1655 | struct net2280_ep *ep; |
| 1656 | |
| 1657 | ep = &dev->ep [i]; |
| 1658 | if (i && !ep->irqs) |
| 1659 | continue; |
| 1660 | t = scnprintf (next, size, " %s/%lu", ep->ep.name, ep->irqs); |
| 1661 | size -= t; |
| 1662 | next += t; |
| 1663 | |
| 1664 | } |
| 1665 | t = scnprintf (next, size, "\n"); |
| 1666 | size -= t; |
| 1667 | next += t; |
| 1668 | |
| 1669 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1670 | |
| 1671 | return PAGE_SIZE - size; |
| 1672 | } |
| 1673 | static DEVICE_ATTR (registers, S_IRUGO, show_registers, NULL); |
| 1674 | |
| 1675 | static ssize_t |
Yani Ioannou | 10523b3 | 2005-05-17 06:43:37 -0400 | [diff] [blame] | 1676 | show_queues (struct device *_dev, struct device_attribute *attr, char *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | { |
| 1678 | struct net2280 *dev; |
| 1679 | char *next; |
| 1680 | unsigned size; |
| 1681 | unsigned long flags; |
| 1682 | int i; |
| 1683 | |
| 1684 | dev = dev_get_drvdata (_dev); |
| 1685 | next = buf; |
| 1686 | size = PAGE_SIZE; |
| 1687 | spin_lock_irqsave (&dev->lock, flags); |
| 1688 | |
| 1689 | for (i = 0; i < 7; i++) { |
| 1690 | struct net2280_ep *ep = &dev->ep [i]; |
| 1691 | struct net2280_request *req; |
| 1692 | int t; |
| 1693 | |
| 1694 | if (i != 0) { |
| 1695 | const struct usb_endpoint_descriptor *d; |
| 1696 | |
| 1697 | d = ep->desc; |
| 1698 | if (!d) |
| 1699 | continue; |
| 1700 | t = d->bEndpointAddress; |
| 1701 | t = scnprintf (next, size, |
| 1702 | "\n%s (ep%d%s-%s) max %04x %s fifo %d\n", |
| 1703 | ep->ep.name, t & USB_ENDPOINT_NUMBER_MASK, |
| 1704 | (t & USB_DIR_IN) ? "in" : "out", |
| 1705 | ({ char *val; |
| 1706 | switch (d->bmAttributes & 0x03) { |
| 1707 | case USB_ENDPOINT_XFER_BULK: |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1708 | val = "bulk"; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | case USB_ENDPOINT_XFER_INT: |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1710 | val = "intr"; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | default: |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1712 | val = "iso"; break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1713 | }; val; }), |
| 1714 | le16_to_cpu (d->wMaxPacketSize) & 0x1fff, |
| 1715 | ep->dma ? "dma" : "pio", ep->fifo_size |
| 1716 | ); |
| 1717 | } else /* ep0 should only have one transfer queued */ |
| 1718 | t = scnprintf (next, size, "ep0 max 64 pio %s\n", |
| 1719 | ep->is_in ? "in" : "out"); |
| 1720 | if (t <= 0 || t > size) |
| 1721 | goto done; |
| 1722 | size -= t; |
| 1723 | next += t; |
| 1724 | |
| 1725 | if (list_empty (&ep->queue)) { |
| 1726 | t = scnprintf (next, size, "\t(nothing queued)\n"); |
| 1727 | if (t <= 0 || t > size) |
| 1728 | goto done; |
| 1729 | size -= t; |
| 1730 | next += t; |
| 1731 | continue; |
| 1732 | } |
| 1733 | list_for_each_entry (req, &ep->queue, queue) { |
| 1734 | if (ep->dma && req->td_dma == readl (&ep->dma->dmadesc)) |
| 1735 | t = scnprintf (next, size, |
| 1736 | "\treq %p len %d/%d " |
| 1737 | "buf %p (dmacount %08x)\n", |
| 1738 | &req->req, req->req.actual, |
| 1739 | req->req.length, req->req.buf, |
| 1740 | readl (&ep->dma->dmacount)); |
| 1741 | else |
| 1742 | t = scnprintf (next, size, |
| 1743 | "\treq %p len %d/%d buf %p\n", |
| 1744 | &req->req, req->req.actual, |
| 1745 | req->req.length, req->req.buf); |
| 1746 | if (t <= 0 || t > size) |
| 1747 | goto done; |
| 1748 | size -= t; |
| 1749 | next += t; |
| 1750 | |
| 1751 | if (ep->dma) { |
| 1752 | struct net2280_dma *td; |
| 1753 | |
| 1754 | td = req->td; |
| 1755 | t = scnprintf (next, size, "\t td %08x " |
| 1756 | " count %08x buf %08x desc %08x\n", |
| 1757 | (u32) req->td_dma, |
| 1758 | le32_to_cpu (td->dmacount), |
| 1759 | le32_to_cpu (td->dmaaddr), |
| 1760 | le32_to_cpu (td->dmadesc)); |
| 1761 | if (t <= 0 || t > size) |
| 1762 | goto done; |
| 1763 | size -= t; |
| 1764 | next += t; |
| 1765 | } |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | done: |
| 1770 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1771 | return PAGE_SIZE - size; |
| 1772 | } |
| 1773 | static DEVICE_ATTR (queues, S_IRUGO, show_queues, NULL); |
| 1774 | |
| 1775 | |
| 1776 | #else |
| 1777 | |
Linus Torvalds | 9950421 | 2006-10-17 18:03:33 -0700 | [diff] [blame] | 1778 | #define device_create_file(a,b) (0) |
| 1779 | #define device_remove_file(a,b) do { } while (0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | |
| 1781 | #endif |
| 1782 | |
| 1783 | /*-------------------------------------------------------------------------*/ |
| 1784 | |
| 1785 | /* another driver-specific mode might be a request type doing dma |
| 1786 | * to/from another device fifo instead of to/from memory. |
| 1787 | */ |
| 1788 | |
| 1789 | static void set_fifo_mode (struct net2280 *dev, int mode) |
| 1790 | { |
| 1791 | /* keeping high bits preserves BAR2 */ |
| 1792 | writel ((0xffff << PCI_BASE2_RANGE) | mode, &dev->regs->fifoctl); |
| 1793 | |
| 1794 | /* always ep-{a,b,e,f} ... maybe not ep-c or ep-d */ |
| 1795 | INIT_LIST_HEAD (&dev->gadget.ep_list); |
| 1796 | list_add_tail (&dev->ep [1].ep.ep_list, &dev->gadget.ep_list); |
| 1797 | list_add_tail (&dev->ep [2].ep.ep_list, &dev->gadget.ep_list); |
| 1798 | switch (mode) { |
| 1799 | case 0: |
| 1800 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); |
| 1801 | list_add_tail (&dev->ep [4].ep.ep_list, &dev->gadget.ep_list); |
| 1802 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 1024; |
| 1803 | break; |
| 1804 | case 1: |
| 1805 | dev->ep [1].fifo_size = dev->ep [2].fifo_size = 2048; |
| 1806 | break; |
| 1807 | case 2: |
| 1808 | list_add_tail (&dev->ep [3].ep.ep_list, &dev->gadget.ep_list); |
| 1809 | dev->ep [1].fifo_size = 2048; |
| 1810 | dev->ep [2].fifo_size = 1024; |
| 1811 | break; |
| 1812 | } |
| 1813 | /* fifo sizes for ep0, ep-c, ep-d, ep-e, and ep-f never change */ |
| 1814 | list_add_tail (&dev->ep [5].ep.ep_list, &dev->gadget.ep_list); |
| 1815 | list_add_tail (&dev->ep [6].ep.ep_list, &dev->gadget.ep_list); |
| 1816 | } |
| 1817 | |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 1818 | /* just declare this in any driver that really need it */ |
| 1819 | extern int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode); |
| 1820 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | /** |
| 1822 | * net2280_set_fifo_mode - change allocation of fifo buffers |
| 1823 | * @gadget: access to the net2280 device that will be updated |
| 1824 | * @mode: 0 for default, four 1kB buffers (ep-a through ep-d); |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 1825 | * 1 for two 2kB buffers (ep-a and ep-b only); |
| 1826 | * 2 for one 2kB buffer (ep-a) and two 1kB ones (ep-b, ep-c). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | * |
| 1828 | * returns zero on success, else negative errno. when this succeeds, |
| 1829 | * the contents of gadget->ep_list may have changed. |
| 1830 | * |
| 1831 | * you may only call this function when endpoints a-d are all disabled. |
| 1832 | * use it whenever extra hardware buffering can help performance, such |
| 1833 | * as before enabling "high bandwidth" interrupt endpoints that use |
| 1834 | * maxpacket bigger than 512 (when double buffering would otherwise |
| 1835 | * be unavailable). |
| 1836 | */ |
| 1837 | int net2280_set_fifo_mode (struct usb_gadget *gadget, int mode) |
| 1838 | { |
| 1839 | int i; |
| 1840 | struct net2280 *dev; |
| 1841 | int status = 0; |
| 1842 | unsigned long flags; |
| 1843 | |
| 1844 | if (!gadget) |
| 1845 | return -ENODEV; |
| 1846 | dev = container_of (gadget, struct net2280, gadget); |
| 1847 | |
| 1848 | spin_lock_irqsave (&dev->lock, flags); |
| 1849 | |
| 1850 | for (i = 1; i <= 4; i++) |
| 1851 | if (dev->ep [i].desc) { |
| 1852 | status = -EINVAL; |
| 1853 | break; |
| 1854 | } |
| 1855 | if (mode < 0 || mode > 2) |
| 1856 | status = -EINVAL; |
| 1857 | if (status == 0) |
| 1858 | set_fifo_mode (dev, mode); |
| 1859 | spin_unlock_irqrestore (&dev->lock, flags); |
| 1860 | |
| 1861 | if (status == 0) { |
| 1862 | if (mode == 1) |
| 1863 | DEBUG (dev, "fifo: ep-a 2K, ep-b 2K\n"); |
| 1864 | else if (mode == 2) |
| 1865 | DEBUG (dev, "fifo: ep-a 2K, ep-b 1K, ep-c 1K\n"); |
| 1866 | /* else all are 1K */ |
| 1867 | } |
| 1868 | return status; |
| 1869 | } |
| 1870 | EXPORT_SYMBOL (net2280_set_fifo_mode); |
| 1871 | |
| 1872 | /*-------------------------------------------------------------------------*/ |
| 1873 | |
| 1874 | /* keeping it simple: |
| 1875 | * - one bus driver, initted first; |
| 1876 | * - one function driver, initted second |
| 1877 | * |
| 1878 | * most of the work to support multiple net2280 controllers would |
| 1879 | * be to associate this gadget driver (yes?) with all of them, or |
| 1880 | * perhaps to bind specific drivers to specific devices. |
| 1881 | */ |
| 1882 | |
| 1883 | static struct net2280 *the_controller; |
| 1884 | |
| 1885 | static void usb_reset (struct net2280 *dev) |
| 1886 | { |
| 1887 | u32 tmp; |
| 1888 | |
| 1889 | dev->gadget.speed = USB_SPEED_UNKNOWN; |
| 1890 | (void) readl (&dev->usb->usbctl); |
| 1891 | |
| 1892 | net2280_led_init (dev); |
| 1893 | |
| 1894 | /* disable automatic responses, and irqs */ |
| 1895 | writel (0, &dev->usb->stdrsp); |
| 1896 | writel (0, &dev->regs->pciirqenb0); |
| 1897 | writel (0, &dev->regs->pciirqenb1); |
| 1898 | |
| 1899 | /* clear old dma and irq state */ |
| 1900 | for (tmp = 0; tmp < 4; tmp++) { |
| 1901 | struct net2280_ep *ep = &dev->ep [tmp + 1]; |
| 1902 | |
| 1903 | if (ep->dma) |
| 1904 | abort_dma (ep); |
| 1905 | } |
| 1906 | writel (~0, &dev->regs->irqstat0), |
| 1907 | writel (~(1 << SUSPEND_REQUEST_INTERRUPT), &dev->regs->irqstat1), |
| 1908 | |
| 1909 | /* reset, and enable pci */ |
| 1910 | tmp = readl (&dev->regs->devinit) |
| 1911 | | (1 << PCI_ENABLE) |
| 1912 | | (1 << FIFO_SOFT_RESET) |
| 1913 | | (1 << USB_SOFT_RESET) |
| 1914 | | (1 << M8051_RESET); |
| 1915 | writel (tmp, &dev->regs->devinit); |
| 1916 | |
| 1917 | /* standard fifo and endpoint allocations */ |
| 1918 | set_fifo_mode (dev, (fifo_mode <= 2) ? fifo_mode : 0); |
| 1919 | } |
| 1920 | |
| 1921 | static void usb_reinit (struct net2280 *dev) |
| 1922 | { |
| 1923 | u32 tmp; |
| 1924 | int init_dma; |
| 1925 | |
| 1926 | /* use_dma changes are ignored till next device re-init */ |
| 1927 | init_dma = use_dma; |
| 1928 | |
| 1929 | /* basic endpoint init */ |
| 1930 | for (tmp = 0; tmp < 7; tmp++) { |
| 1931 | struct net2280_ep *ep = &dev->ep [tmp]; |
| 1932 | |
| 1933 | ep->ep.name = ep_name [tmp]; |
| 1934 | ep->dev = dev; |
| 1935 | ep->num = tmp; |
| 1936 | |
| 1937 | if (tmp > 0 && tmp <= 4) { |
| 1938 | ep->fifo_size = 1024; |
| 1939 | if (init_dma) |
| 1940 | ep->dma = &dev->dma [tmp - 1]; |
| 1941 | } else |
| 1942 | ep->fifo_size = 64; |
| 1943 | ep->regs = &dev->epregs [tmp]; |
| 1944 | ep_reset (dev->regs, ep); |
| 1945 | } |
| 1946 | dev->ep [0].ep.maxpacket = 64; |
| 1947 | dev->ep [5].ep.maxpacket = 64; |
| 1948 | dev->ep [6].ep.maxpacket = 64; |
| 1949 | |
| 1950 | dev->gadget.ep0 = &dev->ep [0].ep; |
| 1951 | dev->ep [0].stopped = 0; |
| 1952 | INIT_LIST_HEAD (&dev->gadget.ep0->ep_list); |
| 1953 | |
| 1954 | /* we want to prevent lowlevel/insecure access from the USB host, |
| 1955 | * but erratum 0119 means this enable bit is ignored |
| 1956 | */ |
| 1957 | for (tmp = 0; tmp < 5; tmp++) |
| 1958 | writel (EP_DONTUSE, &dev->dep [tmp].dep_cfg); |
| 1959 | } |
| 1960 | |
| 1961 | static void ep0_start (struct net2280 *dev) |
| 1962 | { |
| 1963 | writel ( (1 << CLEAR_EP_HIDE_STATUS_PHASE) |
| 1964 | | (1 << CLEAR_NAK_OUT_PACKETS) |
| 1965 | | (1 << CLEAR_CONTROL_STATUS_PHASE_HANDSHAKE) |
| 1966 | , &dev->epregs [0].ep_rsp); |
| 1967 | |
| 1968 | /* |
| 1969 | * hardware optionally handles a bunch of standard requests |
| 1970 | * that the API hides from drivers anyway. have it do so. |
| 1971 | * endpoint status/features are handled in software, to |
| 1972 | * help pass tests for some dubious behavior. |
| 1973 | */ |
| 1974 | writel ( (1 << SET_TEST_MODE) |
| 1975 | | (1 << SET_ADDRESS) |
| 1976 | | (1 << DEVICE_SET_CLEAR_DEVICE_REMOTE_WAKEUP) |
| 1977 | | (1 << GET_DEVICE_STATUS) |
| 1978 | | (1 << GET_INTERFACE_STATUS) |
| 1979 | , &dev->usb->stdrsp); |
| 1980 | writel ( (1 << USB_ROOT_PORT_WAKEUP_ENABLE) |
| 1981 | | (1 << SELF_POWERED_USB_DEVICE) |
| 1982 | | (1 << REMOTE_WAKEUP_SUPPORT) |
| 1983 | | (dev->softconnect << USB_DETECT_ENABLE) |
| 1984 | | (1 << SELF_POWERED_STATUS) |
| 1985 | , &dev->usb->usbctl); |
| 1986 | |
| 1987 | /* enable irqs so we can see ep0 and general operation */ |
| 1988 | writel ( (1 << SETUP_PACKET_INTERRUPT_ENABLE) |
| 1989 | | (1 << ENDPOINT_0_INTERRUPT_ENABLE) |
| 1990 | , &dev->regs->pciirqenb0); |
| 1991 | writel ( (1 << PCI_INTERRUPT_ENABLE) |
| 1992 | | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT_ENABLE) |
| 1993 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT_ENABLE) |
| 1994 | | (1 << PCI_RETRY_ABORT_INTERRUPT_ENABLE) |
| 1995 | | (1 << VBUS_INTERRUPT_ENABLE) |
| 1996 | | (1 << ROOT_PORT_RESET_INTERRUPT_ENABLE) |
| 1997 | | (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT_ENABLE) |
| 1998 | , &dev->regs->pciirqenb1); |
| 1999 | |
| 2000 | /* don't leave any writes posted */ |
| 2001 | (void) readl (&dev->usb->usbctl); |
| 2002 | } |
| 2003 | |
| 2004 | /* when a driver is successfully registered, it will receive |
| 2005 | * control requests including set_configuration(), which enables |
| 2006 | * non-control requests. then usb traffic follows until a |
| 2007 | * disconnect is reported. then a host may connect again, or |
| 2008 | * the driver might get unbound. |
| 2009 | */ |
| 2010 | int usb_gadget_register_driver (struct usb_gadget_driver *driver) |
| 2011 | { |
| 2012 | struct net2280 *dev = the_controller; |
| 2013 | int retval; |
| 2014 | unsigned i; |
| 2015 | |
| 2016 | /* insist on high speed support from the driver, since |
| 2017 | * (dev->usb->xcvrdiag & FORCE_FULL_SPEED_MODE) |
| 2018 | * "must not be used in normal operation" |
| 2019 | */ |
| 2020 | if (!driver |
| 2021 | || driver->speed != USB_SPEED_HIGH |
| 2022 | || !driver->bind |
| 2023 | || !driver->unbind |
| 2024 | || !driver->setup) |
| 2025 | return -EINVAL; |
| 2026 | if (!dev) |
| 2027 | return -ENODEV; |
| 2028 | if (dev->driver) |
| 2029 | return -EBUSY; |
| 2030 | |
| 2031 | for (i = 0; i < 7; i++) |
| 2032 | dev->ep [i].irqs = 0; |
| 2033 | |
| 2034 | /* hook up the driver ... */ |
| 2035 | dev->softconnect = 1; |
| 2036 | driver->driver.bus = NULL; |
| 2037 | dev->driver = driver; |
| 2038 | dev->gadget.dev.driver = &driver->driver; |
| 2039 | retval = driver->bind (&dev->gadget); |
| 2040 | if (retval) { |
| 2041 | DEBUG (dev, "bind to driver %s --> %d\n", |
| 2042 | driver->driver.name, retval); |
| 2043 | dev->driver = NULL; |
| 2044 | dev->gadget.dev.driver = NULL; |
| 2045 | return retval; |
| 2046 | } |
| 2047 | |
Jeff Garzik | b3899da | 2006-10-11 21:50:24 -0400 | [diff] [blame] | 2048 | retval = device_create_file (&dev->pdev->dev, &dev_attr_function); |
| 2049 | if (retval) goto err_unbind; |
| 2050 | retval = device_create_file (&dev->pdev->dev, &dev_attr_queues); |
| 2051 | if (retval) goto err_func; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2052 | |
| 2053 | /* ... then enable host detection and ep0; and we're ready |
| 2054 | * for set_configuration as well as eventual disconnect. |
| 2055 | */ |
| 2056 | net2280_led_active (dev, 1); |
| 2057 | ep0_start (dev); |
| 2058 | |
| 2059 | DEBUG (dev, "%s ready, usbctl %08x stdrsp %08x\n", |
| 2060 | driver->driver.name, |
| 2061 | readl (&dev->usb->usbctl), |
| 2062 | readl (&dev->usb->stdrsp)); |
| 2063 | |
| 2064 | /* pci writes may still be posted */ |
| 2065 | return 0; |
Jeff Garzik | b3899da | 2006-10-11 21:50:24 -0400 | [diff] [blame] | 2066 | |
| 2067 | err_func: |
| 2068 | device_remove_file (&dev->pdev->dev, &dev_attr_function); |
| 2069 | err_unbind: |
| 2070 | driver->unbind (&dev->gadget); |
| 2071 | dev->gadget.dev.driver = NULL; |
| 2072 | dev->driver = NULL; |
| 2073 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2074 | } |
| 2075 | EXPORT_SYMBOL (usb_gadget_register_driver); |
| 2076 | |
| 2077 | static void |
| 2078 | stop_activity (struct net2280 *dev, struct usb_gadget_driver *driver) |
| 2079 | { |
| 2080 | int i; |
| 2081 | |
| 2082 | /* don't disconnect if it's not connected */ |
| 2083 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) |
| 2084 | driver = NULL; |
| 2085 | |
| 2086 | /* stop hardware; prevent new request submissions; |
| 2087 | * and kill any outstanding requests. |
| 2088 | */ |
| 2089 | usb_reset (dev); |
| 2090 | for (i = 0; i < 7; i++) |
| 2091 | nuke (&dev->ep [i]); |
| 2092 | |
| 2093 | /* report disconnect; the driver is already quiesced */ |
| 2094 | if (driver) { |
| 2095 | spin_unlock (&dev->lock); |
| 2096 | driver->disconnect (&dev->gadget); |
| 2097 | spin_lock (&dev->lock); |
| 2098 | } |
| 2099 | |
| 2100 | usb_reinit (dev); |
| 2101 | } |
| 2102 | |
| 2103 | int usb_gadget_unregister_driver (struct usb_gadget_driver *driver) |
| 2104 | { |
| 2105 | struct net2280 *dev = the_controller; |
| 2106 | unsigned long flags; |
| 2107 | |
| 2108 | if (!dev) |
| 2109 | return -ENODEV; |
| 2110 | if (!driver || driver != dev->driver) |
| 2111 | return -EINVAL; |
| 2112 | |
| 2113 | spin_lock_irqsave (&dev->lock, flags); |
| 2114 | stop_activity (dev, driver); |
| 2115 | spin_unlock_irqrestore (&dev->lock, flags); |
| 2116 | |
| 2117 | net2280_pullup (&dev->gadget, 0); |
| 2118 | |
| 2119 | driver->unbind (&dev->gadget); |
| 2120 | dev->gadget.dev.driver = NULL; |
| 2121 | dev->driver = NULL; |
| 2122 | |
| 2123 | net2280_led_active (dev, 0); |
| 2124 | device_remove_file (&dev->pdev->dev, &dev_attr_function); |
| 2125 | device_remove_file (&dev->pdev->dev, &dev_attr_queues); |
| 2126 | |
| 2127 | DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name); |
| 2128 | return 0; |
| 2129 | } |
| 2130 | EXPORT_SYMBOL (usb_gadget_unregister_driver); |
| 2131 | |
| 2132 | |
| 2133 | /*-------------------------------------------------------------------------*/ |
| 2134 | |
| 2135 | /* handle ep0, ep-e, ep-f with 64 byte packets: packet per irq. |
| 2136 | * also works for dma-capable endpoints, in pio mode or just |
| 2137 | * to manually advance the queue after short OUT transfers. |
| 2138 | */ |
| 2139 | static void handle_ep_small (struct net2280_ep *ep) |
| 2140 | { |
| 2141 | struct net2280_request *req; |
| 2142 | u32 t; |
| 2143 | /* 0 error, 1 mid-data, 2 done */ |
| 2144 | int mode = 1; |
| 2145 | |
| 2146 | if (!list_empty (&ep->queue)) |
| 2147 | req = list_entry (ep->queue.next, |
| 2148 | struct net2280_request, queue); |
| 2149 | else |
| 2150 | req = NULL; |
| 2151 | |
| 2152 | /* ack all, and handle what we care about */ |
| 2153 | t = readl (&ep->regs->ep_stat); |
| 2154 | ep->irqs++; |
| 2155 | #if 0 |
| 2156 | VDEBUG (ep->dev, "%s ack ep_stat %08x, req %p\n", |
| 2157 | ep->ep.name, t, req ? &req->req : 0); |
| 2158 | #endif |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 2159 | if (!ep->is_in || ep->dev->pdev->device == 0x2280) |
| 2160 | writel (t & ~(1 << NAK_OUT_PACKETS), &ep->regs->ep_stat); |
| 2161 | else |
| 2162 | /* Added for 2282 */ |
| 2163 | writel (t, &ep->regs->ep_stat); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | |
| 2165 | /* for ep0, monitor token irqs to catch data stage length errors |
| 2166 | * and to synchronize on status. |
| 2167 | * |
| 2168 | * also, to defer reporting of protocol stalls ... here's where |
| 2169 | * data or status first appears, handling stalls here should never |
| 2170 | * cause trouble on the host side.. |
| 2171 | * |
| 2172 | * control requests could be slightly faster without token synch for |
| 2173 | * status, but status can jam up that way. |
| 2174 | */ |
| 2175 | if (unlikely (ep->num == 0)) { |
| 2176 | if (ep->is_in) { |
| 2177 | /* status; stop NAKing */ |
| 2178 | if (t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) { |
| 2179 | if (ep->dev->protocol_stall) { |
| 2180 | ep->stopped = 1; |
| 2181 | set_halt (ep); |
| 2182 | } |
| 2183 | if (!req) |
| 2184 | allow_status (ep); |
| 2185 | mode = 2; |
| 2186 | /* reply to extra IN data tokens with a zlp */ |
| 2187 | } else if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { |
| 2188 | if (ep->dev->protocol_stall) { |
| 2189 | ep->stopped = 1; |
| 2190 | set_halt (ep); |
| 2191 | mode = 2; |
Alan Stern | 1f26e28 | 2006-11-16 10:16:00 -0500 | [diff] [blame] | 2192 | } else if (ep->responded && |
| 2193 | !req && !ep->stopped) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2194 | write_fifo (ep, NULL); |
| 2195 | } |
| 2196 | } else { |
| 2197 | /* status; stop NAKing */ |
| 2198 | if (t & (1 << DATA_IN_TOKEN_INTERRUPT)) { |
| 2199 | if (ep->dev->protocol_stall) { |
| 2200 | ep->stopped = 1; |
| 2201 | set_halt (ep); |
| 2202 | } |
| 2203 | mode = 2; |
| 2204 | /* an extra OUT token is an error */ |
| 2205 | } else if (((t & (1 << DATA_OUT_PING_TOKEN_INTERRUPT)) |
| 2206 | && req |
| 2207 | && req->req.actual == req->req.length) |
Alan Stern | 1f26e28 | 2006-11-16 10:16:00 -0500 | [diff] [blame] | 2208 | || (ep->responded && !req)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | ep->dev->protocol_stall = 1; |
| 2210 | set_halt (ep); |
| 2211 | ep->stopped = 1; |
| 2212 | if (req) |
| 2213 | done (ep, req, -EOVERFLOW); |
| 2214 | req = NULL; |
| 2215 | } |
| 2216 | } |
| 2217 | } |
| 2218 | |
| 2219 | if (unlikely (!req)) |
| 2220 | return; |
| 2221 | |
| 2222 | /* manual DMA queue advance after short OUT */ |
| 2223 | if (likely (ep->dma != 0)) { |
| 2224 | if (t & (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT)) { |
| 2225 | u32 count; |
| 2226 | int stopped = ep->stopped; |
| 2227 | |
| 2228 | /* TRANSFERRED works around OUT_DONE erratum 0112. |
| 2229 | * we expect (N <= maxpacket) bytes; host wrote M. |
| 2230 | * iff (M < N) we won't ever see a DMA interrupt. |
| 2231 | */ |
| 2232 | ep->stopped = 1; |
| 2233 | for (count = 0; ; t = readl (&ep->regs->ep_stat)) { |
| 2234 | |
| 2235 | /* any preceding dma transfers must finish. |
| 2236 | * dma handles (M >= N), may empty the queue |
| 2237 | */ |
| 2238 | scan_dma_completions (ep); |
| 2239 | if (unlikely (list_empty (&ep->queue) |
| 2240 | || ep->out_overflow)) { |
| 2241 | req = NULL; |
| 2242 | break; |
| 2243 | } |
| 2244 | req = list_entry (ep->queue.next, |
| 2245 | struct net2280_request, queue); |
| 2246 | |
| 2247 | /* here either (M < N), a "real" short rx; |
| 2248 | * or (M == N) and the queue didn't empty |
| 2249 | */ |
| 2250 | if (likely (t & (1 << FIFO_EMPTY))) { |
| 2251 | count = readl (&ep->dma->dmacount); |
| 2252 | count &= DMA_BYTE_COUNT_MASK; |
| 2253 | if (readl (&ep->dma->dmadesc) |
| 2254 | != req->td_dma) |
| 2255 | req = NULL; |
| 2256 | break; |
| 2257 | } |
| 2258 | udelay(1); |
| 2259 | } |
| 2260 | |
| 2261 | /* stop DMA, leave ep NAKing */ |
| 2262 | writel ((1 << DMA_ABORT), &ep->dma->dmastat); |
| 2263 | spin_stop_dma (ep->dma); |
| 2264 | |
| 2265 | if (likely (req)) { |
| 2266 | req->td->dmacount = 0; |
| 2267 | t = readl (&ep->regs->ep_avail); |
David Brownell | 68dcc68 | 2006-04-02 10:18:53 -0800 | [diff] [blame] | 2268 | dma_done (ep, req, count, |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2269 | (ep->out_overflow || t) |
| 2270 | ? -EOVERFLOW : 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2271 | } |
| 2272 | |
| 2273 | /* also flush to prevent erratum 0106 trouble */ |
| 2274 | if (unlikely (ep->out_overflow |
| 2275 | || (ep->dev->chiprev == 0x0100 |
| 2276 | && ep->dev->gadget.speed |
| 2277 | == USB_SPEED_FULL))) { |
| 2278 | out_flush (ep); |
| 2279 | ep->out_overflow = 0; |
| 2280 | } |
| 2281 | |
| 2282 | /* (re)start dma if needed, stop NAKing */ |
| 2283 | ep->stopped = stopped; |
| 2284 | if (!list_empty (&ep->queue)) |
| 2285 | restart_dma (ep); |
| 2286 | } else |
| 2287 | DEBUG (ep->dev, "%s dma ep_stat %08x ??\n", |
| 2288 | ep->ep.name, t); |
| 2289 | return; |
| 2290 | |
| 2291 | /* data packet(s) received (in the fifo, OUT) */ |
| 2292 | } else if (t & (1 << DATA_PACKET_RECEIVED_INTERRUPT)) { |
| 2293 | if (read_fifo (ep, req) && ep->num != 0) |
| 2294 | mode = 2; |
| 2295 | |
| 2296 | /* data packet(s) transmitted (IN) */ |
| 2297 | } else if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) { |
| 2298 | unsigned len; |
| 2299 | |
| 2300 | len = req->req.length - req->req.actual; |
| 2301 | if (len > ep->ep.maxpacket) |
| 2302 | len = ep->ep.maxpacket; |
| 2303 | req->req.actual += len; |
| 2304 | |
| 2305 | /* if we wrote it all, we're usually done */ |
| 2306 | if (req->req.actual == req->req.length) { |
| 2307 | if (ep->num == 0) { |
Alan Stern | 317e83b | 2006-04-14 16:42:03 -0400 | [diff] [blame] | 2308 | /* send zlps until the status stage */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2309 | } else if (!req->req.zero || len != ep->ep.maxpacket) |
| 2310 | mode = 2; |
| 2311 | } |
| 2312 | |
| 2313 | /* there was nothing to do ... */ |
| 2314 | } else if (mode == 1) |
| 2315 | return; |
| 2316 | |
| 2317 | /* done */ |
| 2318 | if (mode == 2) { |
| 2319 | /* stream endpoints often resubmit/unlink in completion */ |
| 2320 | done (ep, req, 0); |
| 2321 | |
| 2322 | /* maybe advance queue to next request */ |
| 2323 | if (ep->num == 0) { |
| 2324 | /* NOTE: net2280 could let gadget driver start the |
| 2325 | * status stage later. since not all controllers let |
| 2326 | * them control that, the api doesn't (yet) allow it. |
| 2327 | */ |
| 2328 | if (!ep->stopped) |
| 2329 | allow_status (ep); |
| 2330 | req = NULL; |
| 2331 | } else { |
| 2332 | if (!list_empty (&ep->queue) && !ep->stopped) |
| 2333 | req = list_entry (ep->queue.next, |
| 2334 | struct net2280_request, queue); |
| 2335 | else |
| 2336 | req = NULL; |
| 2337 | if (req && !ep->is_in) |
| 2338 | stop_out_naking (ep); |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | /* is there a buffer for the next packet? |
| 2343 | * for best streaming performance, make sure there is one. |
| 2344 | */ |
| 2345 | if (req && !ep->stopped) { |
| 2346 | |
| 2347 | /* load IN fifo with next packet (may be zlp) */ |
| 2348 | if (t & (1 << DATA_PACKET_TRANSMITTED_INTERRUPT)) |
| 2349 | write_fifo (ep, &req->req); |
| 2350 | } |
| 2351 | } |
| 2352 | |
| 2353 | static struct net2280_ep * |
| 2354 | get_ep_by_addr (struct net2280 *dev, u16 wIndex) |
| 2355 | { |
| 2356 | struct net2280_ep *ep; |
| 2357 | |
| 2358 | if ((wIndex & USB_ENDPOINT_NUMBER_MASK) == 0) |
| 2359 | return &dev->ep [0]; |
| 2360 | list_for_each_entry (ep, &dev->gadget.ep_list, ep.ep_list) { |
| 2361 | u8 bEndpointAddress; |
| 2362 | |
| 2363 | if (!ep->desc) |
| 2364 | continue; |
| 2365 | bEndpointAddress = ep->desc->bEndpointAddress; |
| 2366 | if ((wIndex ^ bEndpointAddress) & USB_DIR_IN) |
| 2367 | continue; |
| 2368 | if ((wIndex & 0x0f) == (bEndpointAddress & 0x0f)) |
| 2369 | return ep; |
| 2370 | } |
| 2371 | return NULL; |
| 2372 | } |
| 2373 | |
| 2374 | static void handle_stat0_irqs (struct net2280 *dev, u32 stat) |
| 2375 | { |
| 2376 | struct net2280_ep *ep; |
| 2377 | u32 num, scratch; |
| 2378 | |
| 2379 | /* most of these don't need individual acks */ |
| 2380 | stat &= ~(1 << INTA_ASSERTED); |
| 2381 | if (!stat) |
| 2382 | return; |
| 2383 | // DEBUG (dev, "irqstat0 %04x\n", stat); |
| 2384 | |
| 2385 | /* starting a control request? */ |
| 2386 | if (unlikely (stat & (1 << SETUP_PACKET_INTERRUPT))) { |
| 2387 | union { |
| 2388 | u32 raw [2]; |
| 2389 | struct usb_ctrlrequest r; |
| 2390 | } u; |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 2391 | int tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2392 | struct net2280_request *req; |
| 2393 | |
| 2394 | if (dev->gadget.speed == USB_SPEED_UNKNOWN) { |
| 2395 | if (readl (&dev->usb->usbstat) & (1 << HIGH_SPEED)) |
| 2396 | dev->gadget.speed = USB_SPEED_HIGH; |
| 2397 | else |
| 2398 | dev->gadget.speed = USB_SPEED_FULL; |
| 2399 | net2280_led_speed (dev, dev->gadget.speed); |
| 2400 | DEBUG (dev, "%s speed\n", |
| 2401 | (dev->gadget.speed == USB_SPEED_HIGH) |
| 2402 | ? "high" : "full"); |
| 2403 | } |
| 2404 | |
| 2405 | ep = &dev->ep [0]; |
| 2406 | ep->irqs++; |
| 2407 | |
| 2408 | /* make sure any leftover request state is cleared */ |
| 2409 | stat &= ~(1 << ENDPOINT_0_INTERRUPT); |
| 2410 | while (!list_empty (&ep->queue)) { |
| 2411 | req = list_entry (ep->queue.next, |
| 2412 | struct net2280_request, queue); |
| 2413 | done (ep, req, (req->req.actual == req->req.length) |
| 2414 | ? 0 : -EPROTO); |
| 2415 | } |
| 2416 | ep->stopped = 0; |
| 2417 | dev->protocol_stall = 0; |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 2418 | |
| 2419 | if (ep->dev->pdev->device == 0x2280) |
| 2420 | tmp = (1 << FIFO_OVERFLOW) |
| 2421 | | (1 << FIFO_UNDERFLOW); |
| 2422 | else |
| 2423 | tmp = 0; |
| 2424 | |
| 2425 | writel (tmp | (1 << TIMEOUT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2426 | | (1 << USB_STALL_SENT) |
| 2427 | | (1 << USB_IN_NAK_SENT) |
| 2428 | | (1 << USB_IN_ACK_RCVD) |
| 2429 | | (1 << USB_OUT_PING_NAK_SENT) |
| 2430 | | (1 << USB_OUT_ACK_SENT) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2431 | | (1 << SHORT_PACKET_OUT_DONE_INTERRUPT) |
| 2432 | | (1 << SHORT_PACKET_TRANSFERRED_INTERRUPT) |
| 2433 | | (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| 2434 | | (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
| 2435 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 2436 | | (1 << DATA_IN_TOKEN_INTERRUPT) |
| 2437 | , &ep->regs->ep_stat); |
| 2438 | u.raw [0] = readl (&dev->usb->setup0123); |
| 2439 | u.raw [1] = readl (&dev->usb->setup4567); |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2441 | cpu_to_le32s (&u.raw [0]); |
| 2442 | cpu_to_le32s (&u.raw [1]); |
| 2443 | |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 2444 | tmp = 0; |
| 2445 | |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2446 | #define w_value le16_to_cpup (&u.r.wValue) |
| 2447 | #define w_index le16_to_cpup (&u.r.wIndex) |
| 2448 | #define w_length le16_to_cpup (&u.r.wLength) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2449 | |
| 2450 | /* ack the irq */ |
| 2451 | writel (1 << SETUP_PACKET_INTERRUPT, &dev->regs->irqstat0); |
| 2452 | stat ^= (1 << SETUP_PACKET_INTERRUPT); |
| 2453 | |
| 2454 | /* watch control traffic at the token level, and force |
| 2455 | * synchronization before letting the status stage happen. |
| 2456 | * FIXME ignore tokens we'll NAK, until driver responds. |
| 2457 | * that'll mean a lot less irqs for some drivers. |
| 2458 | */ |
| 2459 | ep->is_in = (u.r.bRequestType & USB_DIR_IN) != 0; |
| 2460 | if (ep->is_in) { |
| 2461 | scratch = (1 << DATA_PACKET_TRANSMITTED_INTERRUPT) |
| 2462 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 2463 | | (1 << DATA_IN_TOKEN_INTERRUPT); |
| 2464 | stop_out_naking (ep); |
| 2465 | } else |
| 2466 | scratch = (1 << DATA_PACKET_RECEIVED_INTERRUPT) |
| 2467 | | (1 << DATA_OUT_PING_TOKEN_INTERRUPT) |
| 2468 | | (1 << DATA_IN_TOKEN_INTERRUPT); |
| 2469 | writel (scratch, &dev->epregs [0].ep_irqenb); |
| 2470 | |
| 2471 | /* we made the hardware handle most lowlevel requests; |
| 2472 | * everything else goes uplevel to the gadget code. |
| 2473 | */ |
Alan Stern | 1f26e28 | 2006-11-16 10:16:00 -0500 | [diff] [blame] | 2474 | ep->responded = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2475 | switch (u.r.bRequest) { |
| 2476 | case USB_REQ_GET_STATUS: { |
| 2477 | struct net2280_ep *e; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2478 | __le32 status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | |
| 2480 | /* hw handles device and interface status */ |
| 2481 | if (u.r.bRequestType != (USB_DIR_IN|USB_RECIP_ENDPOINT)) |
| 2482 | goto delegate; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2483 | if ((e = get_ep_by_addr (dev, w_index)) == 0 |
| 2484 | || w_length > 2) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2485 | goto do_stall; |
| 2486 | |
| 2487 | if (readl (&e->regs->ep_rsp) |
| 2488 | & (1 << SET_ENDPOINT_HALT)) |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2489 | status = __constant_cpu_to_le32 (1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2490 | else |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2491 | status = __constant_cpu_to_le32 (0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2492 | |
| 2493 | /* don't bother with a request object! */ |
| 2494 | writel (0, &dev->epregs [0].ep_irqenb); |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2495 | set_fifo_bytecount (ep, w_length); |
| 2496 | writel ((__force u32)status, &dev->epregs [0].ep_data); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2497 | allow_status (ep); |
| 2498 | VDEBUG (dev, "%s stat %02x\n", ep->ep.name, status); |
| 2499 | goto next_endpoints; |
| 2500 | } |
| 2501 | break; |
| 2502 | case USB_REQ_CLEAR_FEATURE: { |
| 2503 | struct net2280_ep *e; |
| 2504 | |
| 2505 | /* hw handles device features */ |
| 2506 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
| 2507 | goto delegate; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2508 | if (w_value != USB_ENDPOINT_HALT |
| 2509 | || w_length != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2510 | goto do_stall; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2511 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | goto do_stall; |
| 2513 | clear_halt (e); |
| 2514 | allow_status (ep); |
| 2515 | VDEBUG (dev, "%s clear halt\n", ep->ep.name); |
| 2516 | goto next_endpoints; |
| 2517 | } |
| 2518 | break; |
| 2519 | case USB_REQ_SET_FEATURE: { |
| 2520 | struct net2280_ep *e; |
| 2521 | |
| 2522 | /* hw handles device features */ |
| 2523 | if (u.r.bRequestType != USB_RECIP_ENDPOINT) |
| 2524 | goto delegate; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2525 | if (w_value != USB_ENDPOINT_HALT |
| 2526 | || w_length != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2527 | goto do_stall; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2528 | if ((e = get_ep_by_addr (dev, w_index)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2529 | goto do_stall; |
| 2530 | set_halt (e); |
| 2531 | allow_status (ep); |
| 2532 | VDEBUG (dev, "%s set halt\n", ep->ep.name); |
| 2533 | goto next_endpoints; |
| 2534 | } |
| 2535 | break; |
| 2536 | default: |
| 2537 | delegate: |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2538 | VDEBUG (dev, "setup %02x.%02x v%04x i%04x l%04x" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | "ep_cfg %08x\n", |
| 2540 | u.r.bRequestType, u.r.bRequest, |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2541 | w_value, w_index, w_length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2542 | readl (&ep->regs->ep_cfg)); |
Alan Stern | 1f26e28 | 2006-11-16 10:16:00 -0500 | [diff] [blame] | 2543 | ep->responded = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2544 | spin_unlock (&dev->lock); |
| 2545 | tmp = dev->driver->setup (&dev->gadget, &u.r); |
| 2546 | spin_lock (&dev->lock); |
| 2547 | } |
| 2548 | |
| 2549 | /* stall ep0 on error */ |
| 2550 | if (tmp < 0) { |
| 2551 | do_stall: |
| 2552 | VDEBUG (dev, "req %02x.%02x protocol STALL; stat %d\n", |
| 2553 | u.r.bRequestType, u.r.bRequest, tmp); |
| 2554 | dev->protocol_stall = 1; |
| 2555 | } |
| 2556 | |
| 2557 | /* some in/out token irq should follow; maybe stall then. |
| 2558 | * driver must queue a request (even zlp) or halt ep0 |
| 2559 | * before the host times out. |
| 2560 | */ |
| 2561 | } |
| 2562 | |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2563 | #undef w_value |
| 2564 | #undef w_index |
| 2565 | #undef w_length |
| 2566 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2567 | next_endpoints: |
| 2568 | /* endpoint data irq ? */ |
| 2569 | scratch = stat & 0x7f; |
| 2570 | stat &= ~0x7f; |
| 2571 | for (num = 0; scratch; num++) { |
| 2572 | u32 t; |
| 2573 | |
| 2574 | /* do this endpoint's FIFO and queue need tending? */ |
| 2575 | t = 1 << num; |
| 2576 | if ((scratch & t) == 0) |
| 2577 | continue; |
| 2578 | scratch ^= t; |
| 2579 | |
| 2580 | ep = &dev->ep [num]; |
| 2581 | handle_ep_small (ep); |
| 2582 | } |
| 2583 | |
| 2584 | if (stat) |
| 2585 | DEBUG (dev, "unhandled irqstat0 %08x\n", stat); |
| 2586 | } |
| 2587 | |
| 2588 | #define DMA_INTERRUPTS ( \ |
| 2589 | (1 << DMA_D_INTERRUPT) \ |
| 2590 | | (1 << DMA_C_INTERRUPT) \ |
| 2591 | | (1 << DMA_B_INTERRUPT) \ |
| 2592 | | (1 << DMA_A_INTERRUPT)) |
| 2593 | #define PCI_ERROR_INTERRUPTS ( \ |
| 2594 | (1 << PCI_MASTER_ABORT_RECEIVED_INTERRUPT) \ |
| 2595 | | (1 << PCI_TARGET_ABORT_RECEIVED_INTERRUPT) \ |
| 2596 | | (1 << PCI_RETRY_ABORT_INTERRUPT)) |
| 2597 | |
| 2598 | static void handle_stat1_irqs (struct net2280 *dev, u32 stat) |
| 2599 | { |
| 2600 | struct net2280_ep *ep; |
| 2601 | u32 tmp, num, mask, scratch; |
| 2602 | |
| 2603 | /* after disconnect there's nothing else to do! */ |
| 2604 | tmp = (1 << VBUS_INTERRUPT) | (1 << ROOT_PORT_RESET_INTERRUPT); |
| 2605 | mask = (1 << HIGH_SPEED) | (1 << FULL_SPEED); |
| 2606 | |
| 2607 | /* VBUS disconnect is indicated by VBUS_PIN and VBUS_INTERRUPT set. |
| 2608 | * Root Port Reset is indicated by ROOT_PORT_RESET_INTERRRUPT set and |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2609 | * both HIGH_SPEED and FULL_SPEED clear (as ROOT_PORT_RESET_INTERRUPT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2610 | * only indicates a change in the reset state). |
| 2611 | */ |
| 2612 | if (stat & tmp) { |
| 2613 | writel (tmp, &dev->regs->irqstat1); |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2614 | if ((((stat & (1 << ROOT_PORT_RESET_INTERRUPT)) |
| 2615 | && ((readl (&dev->usb->usbstat) & mask) |
| 2616 | == 0)) |
| 2617 | || ((readl (&dev->usb->usbctl) |
| 2618 | & (1 << VBUS_PIN)) == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2619 | ) && ( dev->gadget.speed != USB_SPEED_UNKNOWN)) { |
| 2620 | DEBUG (dev, "disconnect %s\n", |
| 2621 | dev->driver->driver.name); |
| 2622 | stop_activity (dev, dev->driver); |
| 2623 | ep0_start (dev); |
| 2624 | return; |
| 2625 | } |
| 2626 | stat &= ~tmp; |
| 2627 | |
| 2628 | /* vBUS can bounce ... one of many reasons to ignore the |
| 2629 | * notion of hotplug events on bus connect/disconnect! |
| 2630 | */ |
| 2631 | if (!stat) |
| 2632 | return; |
| 2633 | } |
| 2634 | |
| 2635 | /* NOTE: chip stays in PCI D0 state for now, but it could |
| 2636 | * enter D1 to save more power |
| 2637 | */ |
| 2638 | tmp = (1 << SUSPEND_REQUEST_CHANGE_INTERRUPT); |
| 2639 | if (stat & tmp) { |
| 2640 | writel (tmp, &dev->regs->irqstat1); |
| 2641 | if (stat & (1 << SUSPEND_REQUEST_INTERRUPT)) { |
| 2642 | if (dev->driver->suspend) |
| 2643 | dev->driver->suspend (&dev->gadget); |
| 2644 | if (!enable_suspend) |
| 2645 | stat &= ~(1 << SUSPEND_REQUEST_INTERRUPT); |
| 2646 | } else { |
| 2647 | if (dev->driver->resume) |
| 2648 | dev->driver->resume (&dev->gadget); |
| 2649 | /* at high speed, note erratum 0133 */ |
| 2650 | } |
| 2651 | stat &= ~tmp; |
| 2652 | } |
| 2653 | |
| 2654 | /* clear any other status/irqs */ |
| 2655 | if (stat) |
| 2656 | writel (stat, &dev->regs->irqstat1); |
| 2657 | |
| 2658 | /* some status we can just ignore */ |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 2659 | if (dev->pdev->device == 0x2280) |
| 2660 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) |
| 2661 | | (1 << SUSPEND_REQUEST_INTERRUPT) |
| 2662 | | (1 << RESUME_INTERRUPT) |
| 2663 | | (1 << SOF_INTERRUPT)); |
| 2664 | else |
| 2665 | stat &= ~((1 << CONTROL_STATUS_INTERRUPT) |
| 2666 | | (1 << RESUME_INTERRUPT) |
| 2667 | | (1 << SOF_DOWN_INTERRUPT) |
| 2668 | | (1 << SOF_INTERRUPT)); |
| 2669 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2670 | if (!stat) |
| 2671 | return; |
| 2672 | // DEBUG (dev, "irqstat1 %08x\n", stat); |
| 2673 | |
| 2674 | /* DMA status, for ep-{a,b,c,d} */ |
| 2675 | scratch = stat & DMA_INTERRUPTS; |
| 2676 | stat &= ~DMA_INTERRUPTS; |
| 2677 | scratch >>= 9; |
| 2678 | for (num = 0; scratch; num++) { |
| 2679 | struct net2280_dma_regs __iomem *dma; |
| 2680 | |
| 2681 | tmp = 1 << num; |
| 2682 | if ((tmp & scratch) == 0) |
| 2683 | continue; |
| 2684 | scratch ^= tmp; |
| 2685 | |
| 2686 | ep = &dev->ep [num + 1]; |
| 2687 | dma = ep->dma; |
| 2688 | |
| 2689 | if (!dma) |
| 2690 | continue; |
| 2691 | |
| 2692 | /* clear ep's dma status */ |
| 2693 | tmp = readl (&dma->dmastat); |
| 2694 | writel (tmp, &dma->dmastat); |
| 2695 | |
| 2696 | /* chaining should stop on abort, short OUT from fifo, |
| 2697 | * or (stat0 codepath) short OUT transfer. |
| 2698 | */ |
| 2699 | if (!use_dma_chaining) { |
| 2700 | if ((tmp & (1 << DMA_TRANSACTION_DONE_INTERRUPT)) |
| 2701 | == 0) { |
| 2702 | DEBUG (ep->dev, "%s no xact done? %08x\n", |
| 2703 | ep->ep.name, tmp); |
| 2704 | continue; |
| 2705 | } |
| 2706 | stop_dma (ep->dma); |
| 2707 | } |
| 2708 | |
| 2709 | /* OUT transfers terminate when the data from the |
| 2710 | * host is in our memory. Process whatever's done. |
| 2711 | * On this path, we know transfer's last packet wasn't |
| 2712 | * less than req->length. NAK_OUT_PACKETS may be set, |
| 2713 | * or the FIFO may already be holding new packets. |
| 2714 | * |
| 2715 | * IN transfers can linger in the FIFO for a very |
| 2716 | * long time ... we ignore that for now, accounting |
| 2717 | * precisely (like PIO does) needs per-packet irqs |
| 2718 | */ |
| 2719 | scan_dma_completions (ep); |
| 2720 | |
| 2721 | /* disable dma on inactive queues; else maybe restart */ |
| 2722 | if (list_empty (&ep->queue)) { |
| 2723 | if (use_dma_chaining) |
| 2724 | stop_dma (ep->dma); |
| 2725 | } else { |
| 2726 | tmp = readl (&dma->dmactl); |
| 2727 | if (!use_dma_chaining |
| 2728 | || (tmp & (1 << DMA_ENABLE)) == 0) |
| 2729 | restart_dma (ep); |
| 2730 | else if (ep->is_in && use_dma_chaining) { |
| 2731 | struct net2280_request *req; |
David Brownell | 320f345 | 2005-05-07 13:05:18 -0700 | [diff] [blame] | 2732 | __le32 dmacount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2733 | |
| 2734 | /* the descriptor at the head of the chain |
| 2735 | * may still have VALID_BIT clear; that's |
| 2736 | * used to trigger changing DMA_FIFO_VALIDATE |
| 2737 | * (affects automagic zlp writes). |
| 2738 | */ |
| 2739 | req = list_entry (ep->queue.next, |
| 2740 | struct net2280_request, queue); |
| 2741 | dmacount = req->td->dmacount; |
| 2742 | dmacount &= __constant_cpu_to_le32 ( |
| 2743 | (1 << VALID_BIT) |
| 2744 | | DMA_BYTE_COUNT_MASK); |
| 2745 | if (dmacount && (dmacount & valid_bit) == 0) |
| 2746 | restart_dma (ep); |
| 2747 | } |
| 2748 | } |
| 2749 | ep->irqs++; |
| 2750 | } |
| 2751 | |
| 2752 | /* NOTE: there are other PCI errors we might usefully notice. |
| 2753 | * if they appear very often, here's where to try recovering. |
| 2754 | */ |
| 2755 | if (stat & PCI_ERROR_INTERRUPTS) { |
| 2756 | ERROR (dev, "pci dma error; stat %08x\n", stat); |
| 2757 | stat &= ~PCI_ERROR_INTERRUPTS; |
| 2758 | /* these are fatal errors, but "maybe" they won't |
| 2759 | * happen again ... |
| 2760 | */ |
| 2761 | stop_activity (dev, dev->driver); |
| 2762 | ep0_start (dev); |
| 2763 | stat = 0; |
| 2764 | } |
| 2765 | |
| 2766 | if (stat) |
| 2767 | DEBUG (dev, "unhandled irqstat1 %08x\n", stat); |
| 2768 | } |
| 2769 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 2770 | static irqreturn_t net2280_irq (int irq, void *_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2771 | { |
| 2772 | struct net2280 *dev = _dev; |
| 2773 | |
Alan Stern | 658ad5e | 2006-04-14 16:44:11 -0400 | [diff] [blame] | 2774 | /* shared interrupt, not ours */ |
| 2775 | if (!(readl(&dev->regs->irqstat0) & (1 << INTA_ASSERTED))) |
| 2776 | return IRQ_NONE; |
| 2777 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | spin_lock (&dev->lock); |
| 2779 | |
| 2780 | /* handle disconnect, dma, and more */ |
| 2781 | handle_stat1_irqs (dev, readl (&dev->regs->irqstat1)); |
| 2782 | |
| 2783 | /* control requests and PIO */ |
| 2784 | handle_stat0_irqs (dev, readl (&dev->regs->irqstat0)); |
| 2785 | |
| 2786 | spin_unlock (&dev->lock); |
| 2787 | |
| 2788 | return IRQ_HANDLED; |
| 2789 | } |
| 2790 | |
| 2791 | /*-------------------------------------------------------------------------*/ |
| 2792 | |
| 2793 | static void gadget_release (struct device *_dev) |
| 2794 | { |
| 2795 | struct net2280 *dev = dev_get_drvdata (_dev); |
| 2796 | |
| 2797 | kfree (dev); |
| 2798 | } |
| 2799 | |
| 2800 | /* tear down the binding between this driver and the pci device */ |
| 2801 | |
| 2802 | static void net2280_remove (struct pci_dev *pdev) |
| 2803 | { |
| 2804 | struct net2280 *dev = pci_get_drvdata (pdev); |
| 2805 | |
| 2806 | /* start with the driver above us */ |
| 2807 | if (dev->driver) { |
| 2808 | /* should have been done already by driver model core */ |
| 2809 | WARN (dev, "pci remove, driver '%s' is still registered\n", |
| 2810 | dev->driver->driver.name); |
| 2811 | usb_gadget_unregister_driver (dev->driver); |
| 2812 | } |
| 2813 | |
| 2814 | /* then clean up the resources we allocated during probe() */ |
| 2815 | net2280_led_shutdown (dev); |
| 2816 | if (dev->requests) { |
| 2817 | int i; |
| 2818 | for (i = 1; i < 5; i++) { |
| 2819 | if (!dev->ep [i].dummy) |
| 2820 | continue; |
| 2821 | pci_pool_free (dev->requests, dev->ep [i].dummy, |
| 2822 | dev->ep [i].td_dma); |
| 2823 | } |
| 2824 | pci_pool_destroy (dev->requests); |
| 2825 | } |
| 2826 | if (dev->got_irq) |
| 2827 | free_irq (pdev->irq, dev); |
| 2828 | if (dev->regs) |
| 2829 | iounmap (dev->regs); |
| 2830 | if (dev->region) |
| 2831 | release_mem_region (pci_resource_start (pdev, 0), |
| 2832 | pci_resource_len (pdev, 0)); |
| 2833 | if (dev->enabled) |
| 2834 | pci_disable_device (pdev); |
| 2835 | device_unregister (&dev->gadget.dev); |
| 2836 | device_remove_file (&pdev->dev, &dev_attr_registers); |
| 2837 | pci_set_drvdata (pdev, NULL); |
| 2838 | |
| 2839 | INFO (dev, "unbind\n"); |
| 2840 | |
| 2841 | the_controller = NULL; |
| 2842 | } |
| 2843 | |
| 2844 | /* wrap this driver around the specified device, but |
| 2845 | * don't respond over USB until a gadget driver binds to us. |
| 2846 | */ |
| 2847 | |
| 2848 | static int net2280_probe (struct pci_dev *pdev, const struct pci_device_id *id) |
| 2849 | { |
| 2850 | struct net2280 *dev; |
| 2851 | unsigned long resource, len; |
| 2852 | void __iomem *base = NULL; |
| 2853 | int retval, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2854 | |
| 2855 | /* if you want to support more than one controller in a system, |
| 2856 | * usb_gadget_driver_{register,unregister}() must change. |
| 2857 | */ |
| 2858 | if (the_controller) { |
| 2859 | dev_warn (&pdev->dev, "ignoring\n"); |
| 2860 | return -EBUSY; |
| 2861 | } |
| 2862 | |
| 2863 | /* alloc, and start init */ |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 2864 | dev = kzalloc (sizeof *dev, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | if (dev == NULL){ |
| 2866 | retval = -ENOMEM; |
| 2867 | goto done; |
| 2868 | } |
| 2869 | |
Alan Stern | 9fb81ce | 2006-04-14 16:46:28 -0400 | [diff] [blame] | 2870 | pci_set_drvdata (pdev, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2871 | spin_lock_init (&dev->lock); |
| 2872 | dev->pdev = pdev; |
| 2873 | dev->gadget.ops = &net2280_ops; |
| 2874 | dev->gadget.is_dualspeed = 1; |
| 2875 | |
| 2876 | /* the "gadget" abstracts/virtualizes the controller */ |
| 2877 | strcpy (dev->gadget.dev.bus_id, "gadget"); |
| 2878 | dev->gadget.dev.parent = &pdev->dev; |
| 2879 | dev->gadget.dev.dma_mask = pdev->dev.dma_mask; |
| 2880 | dev->gadget.dev.release = gadget_release; |
| 2881 | dev->gadget.name = driver_name; |
| 2882 | |
| 2883 | /* now all the pci goodies ... */ |
| 2884 | if (pci_enable_device (pdev) < 0) { |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2885 | retval = -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2886 | goto done; |
| 2887 | } |
| 2888 | dev->enabled = 1; |
| 2889 | |
| 2890 | /* BAR 0 holds all the registers |
| 2891 | * BAR 1 is 8051 memory; unused here (note erratum 0103) |
| 2892 | * BAR 2 is fifo memory; unused here |
| 2893 | */ |
| 2894 | resource = pci_resource_start (pdev, 0); |
| 2895 | len = pci_resource_len (pdev, 0); |
| 2896 | if (!request_mem_region (resource, len, driver_name)) { |
| 2897 | DEBUG (dev, "controller already in use\n"); |
| 2898 | retval = -EBUSY; |
| 2899 | goto done; |
| 2900 | } |
| 2901 | dev->region = 1; |
| 2902 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 2903 | /* FIXME provide firmware download interface to put |
| 2904 | * 8051 code into the chip, e.g. to turn on PCI PM. |
| 2905 | */ |
| 2906 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2907 | base = ioremap_nocache (resource, len); |
| 2908 | if (base == NULL) { |
| 2909 | DEBUG (dev, "can't map memory\n"); |
| 2910 | retval = -EFAULT; |
| 2911 | goto done; |
| 2912 | } |
| 2913 | dev->regs = (struct net2280_regs __iomem *) base; |
| 2914 | dev->usb = (struct net2280_usb_regs __iomem *) (base + 0x0080); |
| 2915 | dev->pci = (struct net2280_pci_regs __iomem *) (base + 0x0100); |
| 2916 | dev->dma = (struct net2280_dma_regs __iomem *) (base + 0x0180); |
| 2917 | dev->dep = (struct net2280_dep_regs __iomem *) (base + 0x0200); |
| 2918 | dev->epregs = (struct net2280_ep_regs __iomem *) (base + 0x0300); |
| 2919 | |
| 2920 | /* put into initial config, link up all endpoints */ |
| 2921 | writel (0, &dev->usb->usbctl); |
| 2922 | usb_reset (dev); |
| 2923 | usb_reinit (dev); |
| 2924 | |
| 2925 | /* irq setup after old hardware is cleaned up */ |
| 2926 | if (!pdev->irq) { |
| 2927 | ERROR (dev, "No IRQ. Check PCI setup!\n"); |
| 2928 | retval = -ENODEV; |
| 2929 | goto done; |
| 2930 | } |
David S. Miller | c6387a4 | 2006-06-20 01:21:29 -0700 | [diff] [blame] | 2931 | |
Thomas Gleixner | d54b5ca | 2006-07-01 19:29:44 -0700 | [diff] [blame] | 2932 | if (request_irq (pdev->irq, net2280_irq, IRQF_SHARED, driver_name, dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2933 | != 0) { |
David S. Miller | c6387a4 | 2006-06-20 01:21:29 -0700 | [diff] [blame] | 2934 | ERROR (dev, "request interrupt %d failed\n", pdev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2935 | retval = -EBUSY; |
| 2936 | goto done; |
| 2937 | } |
| 2938 | dev->got_irq = 1; |
| 2939 | |
| 2940 | /* DMA setup */ |
| 2941 | /* NOTE: we know only the 32 LSBs of dma addresses may be nonzero */ |
| 2942 | dev->requests = pci_pool_create ("requests", pdev, |
| 2943 | sizeof (struct net2280_dma), |
| 2944 | 0 /* no alignment requirements */, |
| 2945 | 0 /* or page-crossing issues */); |
| 2946 | if (!dev->requests) { |
| 2947 | DEBUG (dev, "can't get request pool\n"); |
| 2948 | retval = -ENOMEM; |
| 2949 | goto done; |
| 2950 | } |
| 2951 | for (i = 1; i < 5; i++) { |
| 2952 | struct net2280_dma *td; |
| 2953 | |
| 2954 | td = pci_pool_alloc (dev->requests, GFP_KERNEL, |
| 2955 | &dev->ep [i].td_dma); |
| 2956 | if (!td) { |
| 2957 | DEBUG (dev, "can't get dummy %d\n", i); |
| 2958 | retval = -ENOMEM; |
| 2959 | goto done; |
| 2960 | } |
| 2961 | td->dmacount = 0; /* not VALID */ |
| 2962 | td->dmaaddr = __constant_cpu_to_le32 (DMA_ADDR_INVALID); |
| 2963 | td->dmadesc = td->dmaaddr; |
| 2964 | dev->ep [i].dummy = td; |
| 2965 | } |
| 2966 | |
| 2967 | /* enable lower-overhead pci memory bursts during DMA */ |
| 2968 | writel ( (1 << DMA_MEMORY_WRITE_AND_INVALIDATE_ENABLE) |
| 2969 | // 256 write retries may not be enough... |
| 2970 | // | (1 << PCI_RETRY_ABORT_ENABLE) |
| 2971 | | (1 << DMA_READ_MULTIPLE_ENABLE) |
| 2972 | | (1 << DMA_READ_LINE_ENABLE) |
| 2973 | , &dev->pci->pcimstctl); |
| 2974 | /* erratum 0115 shouldn't appear: Linux inits PCI_LATENCY_TIMER */ |
| 2975 | pci_set_master (pdev); |
| 2976 | pci_set_mwi (pdev); |
| 2977 | |
| 2978 | /* ... also flushes any posted pci writes */ |
| 2979 | dev->chiprev = get_idx_reg (dev->regs, REG_CHIPREV) & 0xffff; |
| 2980 | |
| 2981 | /* done */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2982 | INFO (dev, "%s\n", driver_desc); |
David S. Miller | c6387a4 | 2006-06-20 01:21:29 -0700 | [diff] [blame] | 2983 | INFO (dev, "irq %d, pci mem %p, chip rev %04x\n", |
| 2984 | pdev->irq, base, dev->chiprev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2985 | INFO (dev, "version: " DRIVER_VERSION "; dma %s\n", |
| 2986 | use_dma |
| 2987 | ? (use_dma_chaining ? "chaining" : "enabled") |
| 2988 | : "disabled"); |
| 2989 | the_controller = dev; |
| 2990 | |
Jeff Garzik | b3899da | 2006-10-11 21:50:24 -0400 | [diff] [blame] | 2991 | retval = device_register (&dev->gadget.dev); |
| 2992 | if (retval) goto done; |
| 2993 | retval = device_create_file (&pdev->dev, &dev_attr_registers); |
| 2994 | if (retval) goto done; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | |
| 2996 | return 0; |
| 2997 | |
| 2998 | done: |
| 2999 | if (dev) |
| 3000 | net2280_remove (pdev); |
| 3001 | return retval; |
| 3002 | } |
| 3003 | |
Alan Stern | 2d61bde | 2006-05-05 16:23:42 -0400 | [diff] [blame] | 3004 | /* make sure the board is quiescent; otherwise it will continue |
| 3005 | * generating IRQs across the upcoming reboot. |
| 3006 | */ |
| 3007 | |
| 3008 | static void net2280_shutdown (struct pci_dev *pdev) |
| 3009 | { |
| 3010 | struct net2280 *dev = pci_get_drvdata (pdev); |
| 3011 | |
| 3012 | /* disable IRQs */ |
| 3013 | writel (0, &dev->regs->pciirqenb0); |
| 3014 | writel (0, &dev->regs->pciirqenb1); |
| 3015 | |
| 3016 | /* disable the pullup so the host will think we're gone */ |
| 3017 | writel (0, &dev->usb->usbctl); |
| 3018 | } |
| 3019 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3020 | |
| 3021 | /*-------------------------------------------------------------------------*/ |
| 3022 | |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 3023 | static const struct pci_device_id pci_ids [] = { { |
| 3024 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
| 3025 | .class_mask = ~0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3026 | .vendor = 0x17cc, |
| 3027 | .device = 0x2280, |
| 3028 | .subvendor = PCI_ANY_ID, |
| 3029 | .subdevice = PCI_ANY_ID, |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 3030 | }, { |
David Brownell | 901b3d7 | 2006-09-02 03:13:45 -0700 | [diff] [blame] | 3031 | .class = ((PCI_CLASS_SERIAL_USB << 8) | 0xfe), |
| 3032 | .class_mask = ~0, |
Guennadi Liakhovetski | 950ee4c | 2006-03-19 20:49:14 +0100 | [diff] [blame] | 3033 | .vendor = 0x17cc, |
| 3034 | .device = 0x2282, |
| 3035 | .subvendor = PCI_ANY_ID, |
| 3036 | .subdevice = PCI_ANY_ID, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | |
| 3038 | }, { /* end: all zeroes */ } |
| 3039 | }; |
| 3040 | MODULE_DEVICE_TABLE (pci, pci_ids); |
| 3041 | |
| 3042 | /* pci driver glue; this is a "new style" PCI driver module */ |
| 3043 | static struct pci_driver net2280_pci_driver = { |
| 3044 | .name = (char *) driver_name, |
| 3045 | .id_table = pci_ids, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3046 | |
| 3047 | .probe = net2280_probe, |
| 3048 | .remove = net2280_remove, |
Alan Stern | 2d61bde | 2006-05-05 16:23:42 -0400 | [diff] [blame] | 3049 | .shutdown = net2280_shutdown, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3050 | |
| 3051 | /* FIXME add power management support */ |
| 3052 | }; |
| 3053 | |
| 3054 | MODULE_DESCRIPTION (DRIVER_DESC); |
| 3055 | MODULE_AUTHOR ("David Brownell"); |
| 3056 | MODULE_LICENSE ("GPL"); |
| 3057 | |
| 3058 | static int __init init (void) |
| 3059 | { |
| 3060 | if (!use_dma) |
| 3061 | use_dma_chaining = 0; |
| 3062 | return pci_register_driver (&net2280_pci_driver); |
| 3063 | } |
| 3064 | module_init (init); |
| 3065 | |
| 3066 | static void __exit cleanup (void) |
| 3067 | { |
| 3068 | pci_unregister_driver (&net2280_pci_driver); |
| 3069 | } |
| 3070 | module_exit (cleanup); |