| 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 2008 Cavium Networks |
| 7 | */ |
| 8 | #include <linux/kernel.h> |
| 9 | #include <linux/module.h> |
| 10 | #include <linux/init.h> |
| 11 | #include <linux/pci.h> |
| 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/usb.h> |
| 15 | |
| 16 | #include <linux/time.h> |
| 17 | #include <linux/delay.h> |
| 18 | |
| 19 | #include <asm/octeon/cvmx.h> |
| 20 | #include "cvmx-usb.h" |
| 21 | #include <asm/octeon/cvmx-iob-defs.h> |
| 22 | |
| 23 | #include <linux/usb/hcd.h> |
| 24 | |
| 25 | #include <linux/err.h> |
| 26 | |
| 27 | struct octeon_hcd { |
| 28 | spinlock_t lock; |
| 29 | cvmx_usb_state_t usb; |
| 30 | struct tasklet_struct dequeue_tasklet; |
| 31 | struct list_head dequeue_list; |
| 32 | }; |
| 33 | |
| 34 | /* convert between an HCD pointer and the corresponding struct octeon_hcd */ |
| 35 | static inline struct octeon_hcd *hcd_to_octeon(struct usb_hcd *hcd) |
| 36 | { |
| 37 | return (struct octeon_hcd *)(hcd->hcd_priv); |
| 38 | } |
| 39 | |
| 40 | static inline struct usb_hcd *octeon_to_hcd(struct octeon_hcd *p) |
| 41 | { |
| 42 | return container_of((void *)p, struct usb_hcd, hcd_priv); |
| 43 | } |
| 44 | |
| 45 | static inline struct octeon_hcd *cvmx_usb_to_octeon(cvmx_usb_state_t *p) |
| 46 | { |
| 47 | return container_of(p, struct octeon_hcd, usb); |
| 48 | } |
| 49 | |
| 50 | static irqreturn_t octeon_usb_irq(struct usb_hcd *hcd) |
| 51 | { |
| 52 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 53 | unsigned long flags; |
| 54 | |
| 55 | spin_lock_irqsave(&priv->lock, flags); |
| 56 | cvmx_usb_poll(&priv->usb); |
| 57 | spin_unlock_irqrestore(&priv->lock, flags); |
| 58 | return IRQ_HANDLED; |
| 59 | } |
| 60 | |
| 61 | static void octeon_usb_port_callback(cvmx_usb_state_t *usb, |
| 62 | cvmx_usb_callback_t reason, |
| 63 | enum cvmx_usb_complete status, |
| 64 | int pipe_handle, |
| 65 | int submit_handle, |
| 66 | int bytes_transferred, |
| 67 | void *user_data) |
| 68 | { |
| 69 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 70 | |
| 71 | spin_unlock(&priv->lock); |
| 72 | usb_hcd_poll_rh_status(octeon_to_hcd(priv)); |
| 73 | spin_lock(&priv->lock); |
| 74 | } |
| 75 | |
| 76 | static int octeon_usb_start(struct usb_hcd *hcd) |
| 77 | { |
| 78 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 79 | unsigned long flags; |
| 80 | |
| 81 | hcd->state = HC_STATE_RUNNING; |
| 82 | spin_lock_irqsave(&priv->lock, flags); |
| 83 | cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED, |
| 84 | octeon_usb_port_callback, NULL); |
| 85 | spin_unlock_irqrestore(&priv->lock, flags); |
| 86 | return 0; |
| 87 | } |
| 88 | |
| 89 | static void octeon_usb_stop(struct usb_hcd *hcd) |
| 90 | { |
| 91 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 92 | unsigned long flags; |
| 93 | |
| 94 | spin_lock_irqsave(&priv->lock, flags); |
| 95 | cvmx_usb_register_callback(&priv->usb, CVMX_USB_CALLBACK_PORT_CHANGED, |
| 96 | NULL, NULL); |
| 97 | spin_unlock_irqrestore(&priv->lock, flags); |
| 98 | hcd->state = HC_STATE_HALT; |
| 99 | } |
| 100 | |
| 101 | static int octeon_usb_get_frame_number(struct usb_hcd *hcd) |
| 102 | { |
| 103 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 104 | |
| 105 | return cvmx_usb_get_frame_number(&priv->usb); |
| 106 | } |
| 107 | |
| 108 | static void octeon_usb_urb_complete_callback(cvmx_usb_state_t *usb, |
| 109 | cvmx_usb_callback_t reason, |
| 110 | enum cvmx_usb_complete status, |
| 111 | int pipe_handle, |
| 112 | int submit_handle, |
| 113 | int bytes_transferred, |
| 114 | void *user_data) |
| 115 | { |
| 116 | struct octeon_hcd *priv = cvmx_usb_to_octeon(usb); |
| 117 | struct usb_hcd *hcd = octeon_to_hcd(priv); |
| 118 | struct device *dev = hcd->self.controller; |
| 119 | struct urb *urb = user_data; |
| 120 | |
| 121 | urb->actual_length = bytes_transferred; |
| 122 | urb->hcpriv = NULL; |
| 123 | |
| 124 | if (!list_empty(&urb->urb_list)) { |
| 125 | /* |
| 126 | * It is on the dequeue_list, but we are going to call |
| 127 | * usb_hcd_giveback_urb(), so we must clear it from |
| 128 | * the list. We got to it before the |
| 129 | * octeon_usb_urb_dequeue_work() tasklet did. |
| 130 | */ |
| 131 | list_del(&urb->urb_list); |
| 132 | /* No longer on the dequeue_list. */ |
| 133 | INIT_LIST_HEAD(&urb->urb_list); |
| 134 | } |
| 135 | |
| 136 | /* For Isochronous transactions we need to update the URB packet status |
| 137 | list from data in our private copy */ |
| 138 | if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) { |
| 139 | int i; |
| 140 | /* |
| 141 | * The pointer to the private list is stored in the setup_packet |
| 142 | * field. |
| 143 | */ |
| 144 | cvmx_usb_iso_packet_t *iso_packet = (cvmx_usb_iso_packet_t *) urb->setup_packet; |
| 145 | /* Recalculate the transfer size by adding up each packet */ |
| 146 | urb->actual_length = 0; |
| 147 | for (i = 0; i < urb->number_of_packets; i++) { |
| 148 | if (iso_packet[i].status == CVMX_USB_COMPLETE_SUCCESS) { |
| 149 | urb->iso_frame_desc[i].status = 0; |
| 150 | urb->iso_frame_desc[i].actual_length = iso_packet[i].length; |
| 151 | urb->actual_length += urb->iso_frame_desc[i].actual_length; |
| 152 | } else { |
| 153 | dev_dbg(dev, "ISOCHRONOUS packet=%d of %d status=%d pipe=%d submit=%d size=%d\n", |
| 154 | i, urb->number_of_packets, |
| 155 | iso_packet[i].status, pipe_handle, |
| 156 | submit_handle, iso_packet[i].length); |
| 157 | urb->iso_frame_desc[i].status = -EREMOTEIO; |
| 158 | } |
| 159 | } |
| 160 | /* Free the private list now that we don't need it anymore */ |
| 161 | kfree(iso_packet); |
| 162 | urb->setup_packet = NULL; |
| 163 | } |
| 164 | |
| 165 | switch (status) { |
| 166 | case CVMX_USB_COMPLETE_SUCCESS: |
| 167 | urb->status = 0; |
| 168 | break; |
| 169 | case CVMX_USB_COMPLETE_CANCEL: |
| 170 | if (urb->status == 0) |
| 171 | urb->status = -ENOENT; |
| 172 | break; |
| 173 | case CVMX_USB_COMPLETE_STALL: |
| 174 | dev_dbg(dev, "status=stall pipe=%d submit=%d size=%d\n", |
| 175 | pipe_handle, submit_handle, bytes_transferred); |
| 176 | urb->status = -EPIPE; |
| 177 | break; |
| 178 | case CVMX_USB_COMPLETE_BABBLEERR: |
| 179 | dev_dbg(dev, "status=babble pipe=%d submit=%d size=%d\n", |
| 180 | pipe_handle, submit_handle, bytes_transferred); |
| 181 | urb->status = -EPIPE; |
| 182 | break; |
| 183 | case CVMX_USB_COMPLETE_SHORT: |
| 184 | dev_dbg(dev, "status=short pipe=%d submit=%d size=%d\n", |
| 185 | pipe_handle, submit_handle, bytes_transferred); |
| 186 | urb->status = -EREMOTEIO; |
| 187 | break; |
| 188 | case CVMX_USB_COMPLETE_ERROR: |
| 189 | case CVMX_USB_COMPLETE_XACTERR: |
| 190 | case CVMX_USB_COMPLETE_DATATGLERR: |
| 191 | case CVMX_USB_COMPLETE_FRAMEERR: |
| 192 | dev_dbg(dev, "status=%d pipe=%d submit=%d size=%d\n", |
| 193 | status, pipe_handle, submit_handle, bytes_transferred); |
| 194 | urb->status = -EPROTO; |
| 195 | break; |
| 196 | } |
| 197 | spin_unlock(&priv->lock); |
| 198 | usb_hcd_giveback_urb(octeon_to_hcd(priv), urb, urb->status); |
| 199 | spin_lock(&priv->lock); |
| 200 | } |
| 201 | |
| 202 | static int octeon_usb_urb_enqueue(struct usb_hcd *hcd, |
| 203 | struct urb *urb, |
| 204 | gfp_t mem_flags) |
| 205 | { |
| 206 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 207 | struct device *dev = hcd->self.controller; |
| 208 | int submit_handle = -1; |
| 209 | int pipe_handle; |
| 210 | unsigned long flags; |
| 211 | cvmx_usb_iso_packet_t *iso_packet; |
| 212 | struct usb_host_endpoint *ep = urb->ep; |
| 213 | |
| 214 | urb->status = 0; |
| 215 | INIT_LIST_HEAD(&urb->urb_list); /* not enqueued on dequeue_list */ |
| 216 | spin_lock_irqsave(&priv->lock, flags); |
| 217 | |
| 218 | if (!ep->hcpriv) { |
| 219 | enum cvmx_usb_transfer transfer_type; |
| 220 | enum cvmx_usb_speed speed; |
| 221 | int split_device = 0; |
| 222 | int split_port = 0; |
| 223 | switch (usb_pipetype(urb->pipe)) { |
| 224 | case PIPE_ISOCHRONOUS: |
| 225 | transfer_type = CVMX_USB_TRANSFER_ISOCHRONOUS; |
| 226 | break; |
| 227 | case PIPE_INTERRUPT: |
| 228 | transfer_type = CVMX_USB_TRANSFER_INTERRUPT; |
| 229 | break; |
| 230 | case PIPE_CONTROL: |
| 231 | transfer_type = CVMX_USB_TRANSFER_CONTROL; |
| 232 | break; |
| 233 | default: |
| 234 | transfer_type = CVMX_USB_TRANSFER_BULK; |
| 235 | break; |
| 236 | } |
| 237 | switch (urb->dev->speed) { |
| 238 | case USB_SPEED_LOW: |
| 239 | speed = CVMX_USB_SPEED_LOW; |
| 240 | break; |
| 241 | case USB_SPEED_FULL: |
| 242 | speed = CVMX_USB_SPEED_FULL; |
| 243 | break; |
| 244 | default: |
| 245 | speed = CVMX_USB_SPEED_HIGH; |
| 246 | break; |
| 247 | } |
| 248 | /* |
| 249 | * For slow devices on high speed ports we need to find the hub |
| 250 | * that does the speed translation so we know where to send the |
| 251 | * split transactions. |
| 252 | */ |
| 253 | if (speed != CVMX_USB_SPEED_HIGH) { |
| 254 | /* |
| 255 | * Start at this device and work our way up the usb |
| 256 | * tree. |
| 257 | */ |
| 258 | struct usb_device *dev = urb->dev; |
| 259 | while (dev->parent) { |
| 260 | /* |
| 261 | * If our parent is high speed then he'll |
| 262 | * receive the splits. |
| 263 | */ |
| 264 | if (dev->parent->speed == USB_SPEED_HIGH) { |
| 265 | split_device = dev->parent->devnum; |
| 266 | split_port = dev->portnum; |
| 267 | break; |
| 268 | } |
| 269 | /* |
| 270 | * Move up the tree one level. If we make it all |
| 271 | * the way up the tree, then the port must not |
| 272 | * be in high speed mode and we don't need a |
| 273 | * split. |
| 274 | */ |
| 275 | dev = dev->parent; |
| 276 | } |
| 277 | } |
| 278 | pipe_handle = cvmx_usb_open_pipe(&priv->usb, |
| 279 | 0, |
| 280 | usb_pipedevice(urb->pipe), |
| 281 | usb_pipeendpoint(urb->pipe), |
| 282 | speed, |
| 283 | le16_to_cpu(ep->desc.wMaxPacketSize) & 0x7ff, |
| 284 | transfer_type, |
| 285 | usb_pipein(urb->pipe) ? CVMX_USB_DIRECTION_IN : CVMX_USB_DIRECTION_OUT, |
| 286 | urb->interval, |
| 287 | (le16_to_cpu(ep->desc.wMaxPacketSize) >> 11) & 0x3, |
| 288 | split_device, |
| 289 | split_port); |
| 290 | if (pipe_handle < 0) { |
| 291 | spin_unlock_irqrestore(&priv->lock, flags); |
| 292 | dev_dbg(dev, "Failed to create pipe\n"); |
| 293 | return -ENOMEM; |
| 294 | } |
| 295 | ep->hcpriv = (void *)(0x10000L + pipe_handle); |
| 296 | } else { |
| 297 | pipe_handle = 0xffff & (long)ep->hcpriv; |
| 298 | } |
| 299 | |
| 300 | switch (usb_pipetype(urb->pipe)) { |
| 301 | case PIPE_ISOCHRONOUS: |
| 302 | dev_dbg(dev, "Submit isochronous to %d.%d\n", |
| 303 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); |
| 304 | /* |
| 305 | * Allocate a structure to use for our private list of |
| 306 | * isochronous packets. |
| 307 | */ |
| 308 | iso_packet = kmalloc(urb->number_of_packets * sizeof(cvmx_usb_iso_packet_t), GFP_ATOMIC); |
| 309 | if (iso_packet) { |
| 310 | int i; |
| 311 | /* Fill the list with the data from the URB */ |
| 312 | for (i = 0; i < urb->number_of_packets; i++) { |
| 313 | iso_packet[i].offset = urb->iso_frame_desc[i].offset; |
| 314 | iso_packet[i].length = urb->iso_frame_desc[i].length; |
| 315 | iso_packet[i].status = CVMX_USB_COMPLETE_ERROR; |
| 316 | } |
| 317 | /* |
| 318 | * Store a pointer to the list in the URB setup_packet |
| 319 | * field. We know this currently isn't being used and |
| 320 | * this saves us a bunch of logic. |
| 321 | */ |
| 322 | urb->setup_packet = (char *)iso_packet; |
| 323 | submit_handle = cvmx_usb_submit_isochronous(&priv->usb, pipe_handle, |
| 324 | urb->start_frame, |
| 325 | 0 /* flags */ , |
| 326 | urb->number_of_packets, |
| 327 | iso_packet, |
| 328 | urb->transfer_dma, |
| 329 | urb->transfer_buffer_length, |
| 330 | octeon_usb_urb_complete_callback, |
| 331 | urb); |
| 332 | /* |
| 333 | * If submit failed we need to free our private packet |
| 334 | * list. |
| 335 | */ |
| 336 | if (submit_handle < 0) { |
| 337 | urb->setup_packet = NULL; |
| 338 | kfree(iso_packet); |
| 339 | } |
| 340 | } |
| 341 | break; |
| 342 | case PIPE_INTERRUPT: |
| 343 | dev_dbg(dev, "Submit interrupt to %d.%d\n", |
| 344 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); |
| 345 | submit_handle = cvmx_usb_submit_interrupt(&priv->usb, pipe_handle, |
| 346 | urb->transfer_dma, |
| 347 | urb->transfer_buffer_length, |
| 348 | octeon_usb_urb_complete_callback, |
| 349 | urb); |
| 350 | break; |
| 351 | case PIPE_CONTROL: |
| 352 | dev_dbg(dev, "Submit control to %d.%d\n", |
| 353 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); |
| 354 | submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle, |
| 355 | urb->setup_dma, |
| 356 | urb->transfer_dma, |
| 357 | urb->transfer_buffer_length, |
| 358 | octeon_usb_urb_complete_callback, |
| 359 | urb); |
| 360 | break; |
| 361 | case PIPE_BULK: |
| 362 | dev_dbg(dev, "Submit bulk to %d.%d\n", |
| 363 | usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe)); |
| 364 | submit_handle = cvmx_usb_submit_bulk(&priv->usb, pipe_handle, |
| 365 | urb->transfer_dma, |
| 366 | urb->transfer_buffer_length, |
| 367 | octeon_usb_urb_complete_callback, |
| 368 | urb); |
| 369 | break; |
| 370 | } |
| 371 | if (submit_handle < 0) { |
| 372 | spin_unlock_irqrestore(&priv->lock, flags); |
| 373 | dev_dbg(dev, "Failed to submit\n"); |
| 374 | return -ENOMEM; |
| 375 | } |
| 376 | urb->hcpriv = (void *)(long)(((submit_handle & 0xffff) << 16) | pipe_handle); |
| 377 | spin_unlock_irqrestore(&priv->lock, flags); |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static void octeon_usb_urb_dequeue_work(unsigned long arg) |
| 382 | { |
| 383 | unsigned long flags; |
| 384 | struct octeon_hcd *priv = (struct octeon_hcd *)arg; |
| 385 | |
| 386 | spin_lock_irqsave(&priv->lock, flags); |
| 387 | |
| 388 | while (!list_empty(&priv->dequeue_list)) { |
| 389 | int pipe_handle; |
| 390 | int submit_handle; |
| 391 | struct urb *urb = container_of(priv->dequeue_list.next, struct urb, urb_list); |
| 392 | list_del(&urb->urb_list); |
| 393 | /* not enqueued on dequeue_list */ |
| 394 | INIT_LIST_HEAD(&urb->urb_list); |
| 395 | pipe_handle = 0xffff & (long)urb->hcpriv; |
| 396 | submit_handle = ((long)urb->hcpriv) >> 16; |
| 397 | cvmx_usb_cancel(&priv->usb, pipe_handle, submit_handle); |
| 398 | } |
| 399 | |
| 400 | spin_unlock_irqrestore(&priv->lock, flags); |
| 401 | } |
| 402 | |
| 403 | static int octeon_usb_urb_dequeue(struct usb_hcd *hcd, struct urb *urb, int status) |
| 404 | { |
| 405 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 406 | unsigned long flags; |
| 407 | |
| 408 | if (!urb->dev) |
| 409 | return -EINVAL; |
| 410 | |
| 411 | spin_lock_irqsave(&priv->lock, flags); |
| 412 | |
| 413 | urb->status = status; |
| 414 | list_add_tail(&urb->urb_list, &priv->dequeue_list); |
| 415 | |
| 416 | spin_unlock_irqrestore(&priv->lock, flags); |
| 417 | |
| 418 | tasklet_schedule(&priv->dequeue_tasklet); |
| 419 | |
| 420 | return 0; |
| 421 | } |
| 422 | |
| 423 | static void octeon_usb_endpoint_disable(struct usb_hcd *hcd, struct usb_host_endpoint *ep) |
| 424 | { |
| 425 | struct device *dev = hcd->self.controller; |
| 426 | |
| 427 | if (ep->hcpriv) { |
| 428 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 429 | int pipe_handle = 0xffff & (long)ep->hcpriv; |
| 430 | unsigned long flags; |
| 431 | spin_lock_irqsave(&priv->lock, flags); |
| 432 | cvmx_usb_cancel_all(&priv->usb, pipe_handle); |
| 433 | if (cvmx_usb_close_pipe(&priv->usb, pipe_handle)) |
| 434 | dev_dbg(dev, "Closing pipe %d failed\n", pipe_handle); |
| 435 | spin_unlock_irqrestore(&priv->lock, flags); |
| 436 | ep->hcpriv = NULL; |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | static int octeon_usb_hub_status_data(struct usb_hcd *hcd, char *buf) |
| 441 | { |
| 442 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 443 | cvmx_usb_port_status_t port_status; |
| 444 | unsigned long flags; |
| 445 | |
| 446 | spin_lock_irqsave(&priv->lock, flags); |
| 447 | port_status = cvmx_usb_get_status(&priv->usb); |
| 448 | spin_unlock_irqrestore(&priv->lock, flags); |
| 449 | buf[0] = 0; |
| 450 | buf[0] = port_status.connect_change << 1; |
| 451 | |
| 452 | return (buf[0] != 0); |
| 453 | } |
| 454 | |
| 455 | static int octeon_usb_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex, char *buf, u16 wLength) |
| 456 | { |
| 457 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 458 | struct device *dev = hcd->self.controller; |
| 459 | cvmx_usb_port_status_t usb_port_status; |
| 460 | int port_status; |
| 461 | struct usb_hub_descriptor *desc; |
| 462 | unsigned long flags; |
| 463 | |
| 464 | switch (typeReq) { |
| 465 | case ClearHubFeature: |
| 466 | dev_dbg(dev, "ClearHubFeature\n"); |
| 467 | switch (wValue) { |
| 468 | case C_HUB_LOCAL_POWER: |
| 469 | case C_HUB_OVER_CURRENT: |
| 470 | /* Nothing required here */ |
| 471 | break; |
| 472 | default: |
| 473 | return -EINVAL; |
| 474 | } |
| 475 | break; |
| 476 | case ClearPortFeature: |
| 477 | dev_dbg(dev, "ClearPortFeature\n"); |
| 478 | if (wIndex != 1) { |
| 479 | dev_dbg(dev, " INVALID\n"); |
| 480 | return -EINVAL; |
| 481 | } |
| 482 | |
| 483 | switch (wValue) { |
| 484 | case USB_PORT_FEAT_ENABLE: |
| 485 | dev_dbg(dev, " ENABLE\n"); |
| 486 | spin_lock_irqsave(&priv->lock, flags); |
| 487 | cvmx_usb_disable(&priv->usb); |
| 488 | spin_unlock_irqrestore(&priv->lock, flags); |
| 489 | break; |
| 490 | case USB_PORT_FEAT_SUSPEND: |
| 491 | dev_dbg(dev, " SUSPEND\n"); |
| 492 | /* Not supported on Octeon */ |
| 493 | break; |
| 494 | case USB_PORT_FEAT_POWER: |
| 495 | dev_dbg(dev, " POWER\n"); |
| 496 | /* Not supported on Octeon */ |
| 497 | break; |
| 498 | case USB_PORT_FEAT_INDICATOR: |
| 499 | dev_dbg(dev, " INDICATOR\n"); |
| 500 | /* Port inidicator not supported */ |
| 501 | break; |
| 502 | case USB_PORT_FEAT_C_CONNECTION: |
| 503 | dev_dbg(dev, " C_CONNECTION\n"); |
| 504 | /* Clears drivers internal connect status change flag */ |
| 505 | spin_lock_irqsave(&priv->lock, flags); |
| 506 | cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb)); |
| 507 | spin_unlock_irqrestore(&priv->lock, flags); |
| 508 | break; |
| 509 | case USB_PORT_FEAT_C_RESET: |
| 510 | dev_dbg(dev, " C_RESET\n"); |
| 511 | /* |
| 512 | * Clears the driver's internal Port Reset Change flag. |
| 513 | */ |
| 514 | spin_lock_irqsave(&priv->lock, flags); |
| 515 | cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb)); |
| 516 | spin_unlock_irqrestore(&priv->lock, flags); |
| 517 | break; |
| 518 | case USB_PORT_FEAT_C_ENABLE: |
| 519 | dev_dbg(dev, " C_ENABLE\n"); |
| 520 | /* |
| 521 | * Clears the driver's internal Port Enable/Disable |
| 522 | * Change flag. |
| 523 | */ |
| 524 | spin_lock_irqsave(&priv->lock, flags); |
| 525 | cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb)); |
| 526 | spin_unlock_irqrestore(&priv->lock, flags); |
| 527 | break; |
| 528 | case USB_PORT_FEAT_C_SUSPEND: |
| 529 | dev_dbg(dev, " C_SUSPEND\n"); |
| 530 | /* |
| 531 | * Clears the driver's internal Port Suspend Change |
| 532 | * flag, which is set when resume signaling on the host |
| 533 | * port is complete. |
| 534 | */ |
| 535 | break; |
| 536 | case USB_PORT_FEAT_C_OVER_CURRENT: |
| 537 | dev_dbg(dev, " C_OVER_CURRENT\n"); |
| 538 | /* Clears the driver's overcurrent Change flag */ |
| 539 | spin_lock_irqsave(&priv->lock, flags); |
| 540 | cvmx_usb_set_status(&priv->usb, cvmx_usb_get_status(&priv->usb)); |
| 541 | spin_unlock_irqrestore(&priv->lock, flags); |
| 542 | break; |
| 543 | default: |
| 544 | dev_dbg(dev, " UNKNOWN\n"); |
| 545 | return -EINVAL; |
| 546 | } |
| 547 | break; |
| 548 | case GetHubDescriptor: |
| 549 | dev_dbg(dev, "GetHubDescriptor\n"); |
| 550 | desc = (struct usb_hub_descriptor *)buf; |
| 551 | desc->bDescLength = 9; |
| 552 | desc->bDescriptorType = 0x29; |
| 553 | desc->bNbrPorts = 1; |
| 554 | desc->wHubCharacteristics = 0x08; |
| 555 | desc->bPwrOn2PwrGood = 1; |
| 556 | desc->bHubContrCurrent = 0; |
| 557 | desc->u.hs.DeviceRemovable[0] = 0; |
| 558 | desc->u.hs.DeviceRemovable[1] = 0xff; |
| 559 | break; |
| 560 | case GetHubStatus: |
| 561 | dev_dbg(dev, "GetHubStatus\n"); |
| 562 | *(__le32 *) buf = 0; |
| 563 | break; |
| 564 | case GetPortStatus: |
| 565 | dev_dbg(dev, "GetPortStatus\n"); |
| 566 | if (wIndex != 1) { |
| 567 | dev_dbg(dev, " INVALID\n"); |
| 568 | return -EINVAL; |
| 569 | } |
| 570 | |
| 571 | spin_lock_irqsave(&priv->lock, flags); |
| 572 | usb_port_status = cvmx_usb_get_status(&priv->usb); |
| 573 | spin_unlock_irqrestore(&priv->lock, flags); |
| 574 | port_status = 0; |
| 575 | |
| 576 | if (usb_port_status.connect_change) { |
| 577 | port_status |= (1 << USB_PORT_FEAT_C_CONNECTION); |
| 578 | dev_dbg(dev, " C_CONNECTION\n"); |
| 579 | } |
| 580 | |
| 581 | if (usb_port_status.port_enabled) { |
| 582 | port_status |= (1 << USB_PORT_FEAT_C_ENABLE); |
| 583 | dev_dbg(dev, " C_ENABLE\n"); |
| 584 | } |
| 585 | |
| 586 | if (usb_port_status.connected) { |
| 587 | port_status |= (1 << USB_PORT_FEAT_CONNECTION); |
| 588 | dev_dbg(dev, " CONNECTION\n"); |
| 589 | } |
| 590 | |
| 591 | if (usb_port_status.port_enabled) { |
| 592 | port_status |= (1 << USB_PORT_FEAT_ENABLE); |
| 593 | dev_dbg(dev, " ENABLE\n"); |
| 594 | } |
| 595 | |
| 596 | if (usb_port_status.port_over_current) { |
| 597 | port_status |= (1 << USB_PORT_FEAT_OVER_CURRENT); |
| 598 | dev_dbg(dev, " OVER_CURRENT\n"); |
| 599 | } |
| 600 | |
| 601 | if (usb_port_status.port_powered) { |
| 602 | port_status |= (1 << USB_PORT_FEAT_POWER); |
| 603 | dev_dbg(dev, " POWER\n"); |
| 604 | } |
| 605 | |
| 606 | if (usb_port_status.port_speed == CVMX_USB_SPEED_HIGH) { |
| 607 | port_status |= USB_PORT_STAT_HIGH_SPEED; |
| 608 | dev_dbg(dev, " HIGHSPEED\n"); |
| 609 | } else if (usb_port_status.port_speed == CVMX_USB_SPEED_LOW) { |
| 610 | port_status |= (1 << USB_PORT_FEAT_LOWSPEED); |
| 611 | dev_dbg(dev, " LOWSPEED\n"); |
| 612 | } |
| 613 | |
| 614 | *((__le32 *) buf) = cpu_to_le32(port_status); |
| 615 | break; |
| 616 | case SetHubFeature: |
| 617 | dev_dbg(dev, "SetHubFeature\n"); |
| 618 | /* No HUB features supported */ |
| 619 | break; |
| 620 | case SetPortFeature: |
| 621 | dev_dbg(dev, "SetPortFeature\n"); |
| 622 | if (wIndex != 1) { |
| 623 | dev_dbg(dev, " INVALID\n"); |
| 624 | return -EINVAL; |
| 625 | } |
| 626 | |
| 627 | switch (wValue) { |
| 628 | case USB_PORT_FEAT_SUSPEND: |
| 629 | dev_dbg(dev, " SUSPEND\n"); |
| 630 | return -EINVAL; |
| 631 | case USB_PORT_FEAT_POWER: |
| 632 | dev_dbg(dev, " POWER\n"); |
| 633 | return -EINVAL; |
| 634 | case USB_PORT_FEAT_RESET: |
| 635 | dev_dbg(dev, " RESET\n"); |
| 636 | spin_lock_irqsave(&priv->lock, flags); |
| 637 | cvmx_usb_disable(&priv->usb); |
| 638 | if (cvmx_usb_enable(&priv->usb)) |
| 639 | dev_dbg(dev, "Failed to enable the port\n"); |
| 640 | spin_unlock_irqrestore(&priv->lock, flags); |
| 641 | return 0; |
| 642 | case USB_PORT_FEAT_INDICATOR: |
| 643 | dev_dbg(dev, " INDICATOR\n"); |
| 644 | /* Not supported */ |
| 645 | break; |
| 646 | default: |
| 647 | dev_dbg(dev, " UNKNOWN\n"); |
| 648 | return -EINVAL; |
| 649 | } |
| 650 | break; |
| 651 | default: |
| 652 | dev_dbg(dev, "Unknown root hub request\n"); |
| 653 | return -EINVAL; |
| 654 | } |
| 655 | return 0; |
| 656 | } |
| 657 | |
| 658 | |
| 659 | static const struct hc_driver octeon_hc_driver = { |
| 660 | .description = "Octeon USB", |
| 661 | .product_desc = "Octeon Host Controller", |
| 662 | .hcd_priv_size = sizeof(struct octeon_hcd), |
| 663 | .irq = octeon_usb_irq, |
| 664 | .flags = HCD_MEMORY | HCD_USB2, |
| 665 | .start = octeon_usb_start, |
| 666 | .stop = octeon_usb_stop, |
| 667 | .urb_enqueue = octeon_usb_urb_enqueue, |
| 668 | .urb_dequeue = octeon_usb_urb_dequeue, |
| 669 | .endpoint_disable = octeon_usb_endpoint_disable, |
| 670 | .get_frame_number = octeon_usb_get_frame_number, |
| 671 | .hub_status_data = octeon_usb_hub_status_data, |
| 672 | .hub_control = octeon_usb_hub_control, |
| 673 | }; |
| 674 | |
| 675 | |
| 676 | static int octeon_usb_driver_probe(struct device *dev) |
| 677 | { |
| 678 | int status; |
| 679 | int usb_num = to_platform_device(dev)->id; |
| 680 | int irq = platform_get_irq(to_platform_device(dev), 0); |
| 681 | struct octeon_hcd *priv; |
| 682 | struct usb_hcd *hcd; |
| 683 | unsigned long flags; |
| 684 | |
| 685 | /* |
| 686 | * Set the DMA mask to 64bits so we get buffers already translated for |
| 687 | * DMA. |
| 688 | */ |
| 689 | dev->coherent_dma_mask = ~0; |
| 690 | dev->dma_mask = &dev->coherent_dma_mask; |
| 691 | |
| 692 | hcd = usb_create_hcd(&octeon_hc_driver, dev, dev_name(dev)); |
| 693 | if (!hcd) { |
| 694 | dev_dbg(dev, "Failed to allocate memory for HCD\n"); |
| 695 | return -1; |
| 696 | } |
| 697 | hcd->uses_new_polling = 1; |
| 698 | priv = (struct octeon_hcd *)hcd->hcd_priv; |
| 699 | |
| 700 | spin_lock_init(&priv->lock); |
| 701 | |
| 702 | tasklet_init(&priv->dequeue_tasklet, octeon_usb_urb_dequeue_work, (unsigned long)priv); |
| 703 | INIT_LIST_HEAD(&priv->dequeue_list); |
| 704 | |
| 705 | status = cvmx_usb_initialize(&priv->usb, usb_num, CVMX_USB_INITIALIZE_FLAGS_CLOCK_AUTO); |
| 706 | if (status) { |
| 707 | dev_dbg(dev, "USB initialization failed with %d\n", status); |
| 708 | kfree(hcd); |
| 709 | return -1; |
| 710 | } |
| 711 | |
| 712 | /* This delay is needed for CN3010, but I don't know why... */ |
| 713 | mdelay(10); |
| 714 | |
| 715 | spin_lock_irqsave(&priv->lock, flags); |
| 716 | cvmx_usb_poll(&priv->usb); |
| 717 | spin_unlock_irqrestore(&priv->lock, flags); |
| 718 | |
| 719 | status = usb_add_hcd(hcd, irq, IRQF_SHARED); |
| 720 | if (status) { |
| 721 | dev_dbg(dev, "USB add HCD failed with %d\n", status); |
| 722 | kfree(hcd); |
| 723 | return -1; |
| 724 | } |
| 725 | |
| 726 | dev_dbg(dev, "Registered HCD for port %d on irq %d\n", usb_num, irq); |
| 727 | |
| 728 | return 0; |
| 729 | } |
| 730 | |
| 731 | static int octeon_usb_driver_remove(struct device *dev) |
| 732 | { |
| 733 | int status; |
| 734 | struct usb_hcd *hcd = dev_get_drvdata(dev); |
| 735 | struct octeon_hcd *priv = hcd_to_octeon(hcd); |
| 736 | unsigned long flags; |
| 737 | |
| 738 | usb_remove_hcd(hcd); |
| 739 | tasklet_kill(&priv->dequeue_tasklet); |
| 740 | spin_lock_irqsave(&priv->lock, flags); |
| 741 | status = cvmx_usb_shutdown(&priv->usb); |
| 742 | spin_unlock_irqrestore(&priv->lock, flags); |
| 743 | if (status) |
| 744 | dev_dbg(dev, "USB shutdown failed with %d\n", status); |
| 745 | |
| 746 | kfree(hcd); |
| 747 | |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | static struct device_driver octeon_usb_driver = { |
| 752 | .name = "OcteonUSB", |
| 753 | .bus = &platform_bus_type, |
| 754 | .probe = octeon_usb_driver_probe, |
| 755 | .remove = octeon_usb_driver_remove, |
| 756 | }; |
| 757 | |
| 758 | |
| 759 | #define MAX_USB_PORTS 10 |
| 760 | static struct platform_device *pdev_glob[MAX_USB_PORTS]; |
| 761 | static int octeon_usb_registered; |
| 762 | static int __init octeon_usb_module_init(void) |
| 763 | { |
| 764 | int num_devices = cvmx_usb_get_num_ports(); |
| 765 | int device; |
| 766 | |
| 767 | if (usb_disabled() || num_devices == 0) |
| 768 | return -ENODEV; |
| 769 | |
| 770 | if (driver_register(&octeon_usb_driver)) |
| 771 | return -ENOMEM; |
| 772 | |
| 773 | octeon_usb_registered = 1; |
| 774 | |
| 775 | /* |
| 776 | * Only cn52XX and cn56XX have DWC_OTG USB hardware and the |
| 777 | * IOB priority registers. Under heavy network load USB |
| 778 | * hardware can be starved by the IOB causing a crash. Give |
| 779 | * it a priority boost if it has been waiting more than 400 |
| 780 | * cycles to avoid this situation. |
| 781 | * |
| 782 | * Testing indicates that a cnt_val of 8192 is not sufficient, |
| 783 | * but no failures are seen with 4096. We choose a value of |
| 784 | * 400 to give a safety factor of 10. |
| 785 | */ |
| 786 | if (OCTEON_IS_MODEL(OCTEON_CN52XX) || OCTEON_IS_MODEL(OCTEON_CN56XX)) { |
| 787 | union cvmx_iob_n2c_l2c_pri_cnt pri_cnt; |
| 788 | |
| 789 | pri_cnt.u64 = 0; |
| 790 | pri_cnt.s.cnt_enb = 1; |
| 791 | pri_cnt.s.cnt_val = 400; |
| 792 | cvmx_write_csr(CVMX_IOB_N2C_L2C_PRI_CNT, pri_cnt.u64); |
| 793 | } |
| 794 | |
| 795 | for (device = 0; device < num_devices; device++) { |
| 796 | struct resource irq_resource; |
| 797 | struct platform_device *pdev; |
| 798 | memset(&irq_resource, 0, sizeof(irq_resource)); |
| 799 | irq_resource.start = (device == 0) ? OCTEON_IRQ_USB0 : OCTEON_IRQ_USB1; |
| 800 | irq_resource.end = irq_resource.start; |
| 801 | irq_resource.flags = IORESOURCE_IRQ; |
| 802 | pdev = platform_device_register_simple((char *)octeon_usb_driver. name, device, &irq_resource, 1); |
| 803 | if (IS_ERR(pdev)) { |
| 804 | driver_unregister(&octeon_usb_driver); |
| 805 | octeon_usb_registered = 0; |
| 806 | return PTR_ERR(pdev); |
| 807 | } |
| 808 | if (device < MAX_USB_PORTS) |
| 809 | pdev_glob[device] = pdev; |
| 810 | |
| 811 | } |
| 812 | return 0; |
| 813 | } |
| 814 | |
| 815 | static void __exit octeon_usb_module_cleanup(void) |
| 816 | { |
| 817 | int i; |
| 818 | |
| 819 | for (i = 0; i < MAX_USB_PORTS; i++) |
| 820 | if (pdev_glob[i]) { |
| 821 | platform_device_unregister(pdev_glob[i]); |
| 822 | pdev_glob[i] = NULL; |
| 823 | } |
| 824 | if (octeon_usb_registered) |
| 825 | driver_unregister(&octeon_usb_driver); |
| 826 | } |
| 827 | |
| 828 | MODULE_LICENSE("GPL"); |
| 829 | MODULE_AUTHOR("Cavium Networks <support@caviumnetworks.com>"); |
| 830 | MODULE_DESCRIPTION("Cavium Networks Octeon USB Host driver."); |
| 831 | module_init(octeon_usb_module_init); |
| 832 | module_exit(octeon_usb_module_cleanup); |