Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * cpia_usb CPiA USB driver |
| 3 | * |
| 4 | * Supports CPiA based parallel port Video Camera's. |
| 5 | * |
| 6 | * Copyright (C) 1999 Jochen Scharrlach <Jochen.Scharrlach@schwaben.de> |
| 7 | * Copyright (C) 1999, 2000 Johannes Erdfelt <johannes@erdfelt.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 22 | */ |
| 23 | |
| 24 | /* define _CPIA_DEBUG_ for verbose debug output (see cpia.h) */ |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 25 | /* #define _CPIA_DEBUG_ 1 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/kernel.h> |
| 29 | #include <linux/init.h> |
| 30 | #include <linux/wait.h> |
| 31 | #include <linux/list.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/vmalloc.h> |
| 34 | #include <linux/usb.h> |
| 35 | |
| 36 | #include "cpia.h" |
| 37 | |
| 38 | #define USB_REQ_CPIA_GRAB_FRAME 0xC1 |
| 39 | #define USB_REQ_CPIA_UPLOAD_FRAME 0xC2 |
| 40 | #define WAIT_FOR_NEXT_FRAME 0 |
| 41 | #define FORCE_FRAME_UPLOAD 1 |
| 42 | |
| 43 | #define FRAMES_PER_DESC 10 |
| 44 | #define FRAME_SIZE_PER_DESC 960 /* Shouldn't be hardcoded */ |
| 45 | #define CPIA_NUMSBUF 2 |
| 46 | #define STREAM_BUF_SIZE (PAGE_SIZE * 4) |
| 47 | #define SCRATCH_BUF_SIZE (STREAM_BUF_SIZE * 2) |
| 48 | |
| 49 | struct cpia_sbuf { |
| 50 | char *data; |
| 51 | struct urb *urb; |
| 52 | }; |
| 53 | |
| 54 | #define FRAMEBUF_LEN (CPIA_MAX_FRAME_SIZE+100) |
| 55 | enum framebuf_status { |
| 56 | FRAME_EMPTY, |
| 57 | FRAME_READING, |
| 58 | FRAME_READY, |
| 59 | FRAME_ERROR, |
| 60 | }; |
| 61 | |
| 62 | struct framebuf { |
| 63 | int length; |
| 64 | enum framebuf_status status; |
| 65 | u8 data[FRAMEBUF_LEN]; |
| 66 | struct framebuf *next; |
| 67 | }; |
| 68 | |
| 69 | struct usb_cpia { |
| 70 | /* Device structure */ |
| 71 | struct usb_device *dev; |
| 72 | |
| 73 | unsigned char iface; |
| 74 | wait_queue_head_t wq_stream; |
| 75 | |
| 76 | int cursbuf; /* Current receiving sbuf */ |
| 77 | struct cpia_sbuf sbuf[CPIA_NUMSBUF]; /* Double buffering */ |
| 78 | |
| 79 | int streaming; |
| 80 | int open; |
| 81 | int present; |
| 82 | struct framebuf *buffers[3]; |
| 83 | struct framebuf *curbuff, *workbuff; |
| 84 | }; |
| 85 | |
| 86 | static int cpia_usb_open(void *privdata); |
| 87 | static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata), |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 88 | void *cbdata); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data); |
| 90 | static int cpia_usb_streamStart(void *privdata); |
| 91 | static int cpia_usb_streamStop(void *privdata); |
| 92 | static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock); |
| 93 | static int cpia_usb_close(void *privdata); |
| 94 | |
| 95 | #define ABOUT "USB driver for Vision CPiA based cameras" |
| 96 | |
| 97 | static struct cpia_camera_ops cpia_usb_ops = { |
| 98 | cpia_usb_open, |
| 99 | cpia_usb_registerCallback, |
| 100 | cpia_usb_transferCmd, |
| 101 | cpia_usb_streamStart, |
| 102 | cpia_usb_streamStop, |
| 103 | cpia_usb_streamRead, |
| 104 | cpia_usb_close, |
| 105 | 0, |
| 106 | THIS_MODULE |
| 107 | }; |
| 108 | |
| 109 | static LIST_HEAD(cam_list); |
| 110 | static spinlock_t cam_list_lock_usb; |
| 111 | |
| 112 | static void cpia_usb_complete(struct urb *urb, struct pt_regs *regs) |
| 113 | { |
| 114 | int i; |
| 115 | char *cdata; |
| 116 | struct usb_cpia *ucpia; |
| 117 | |
| 118 | if (!urb || !urb->context) |
| 119 | return; |
| 120 | |
| 121 | ucpia = (struct usb_cpia *) urb->context; |
| 122 | |
| 123 | if (!ucpia->dev || !ucpia->streaming || !ucpia->present || !ucpia->open) |
| 124 | return; |
| 125 | |
| 126 | if (ucpia->workbuff->status == FRAME_EMPTY) { |
| 127 | ucpia->workbuff->status = FRAME_READING; |
| 128 | ucpia->workbuff->length = 0; |
| 129 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | for (i = 0; i < urb->number_of_packets; i++) { |
| 132 | int n = urb->iso_frame_desc[i].actual_length; |
| 133 | int st = urb->iso_frame_desc[i].status; |
| 134 | |
| 135 | cdata = urb->transfer_buffer + urb->iso_frame_desc[i].offset; |
| 136 | |
| 137 | if (st) |
| 138 | printk(KERN_DEBUG "cpia data error: [%d] len=%d, status=%X\n", i, n, st); |
| 139 | |
| 140 | if (FRAMEBUF_LEN < ucpia->workbuff->length + n) { |
| 141 | printk(KERN_DEBUG "cpia: scratch buf overflow!scr_len: %d, n: %d\n", ucpia->workbuff->length, n); |
| 142 | return; |
| 143 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | if (n) { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 146 | if ((ucpia->workbuff->length > 0) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | (0x19 == cdata[0] && 0x68 == cdata[1])) { |
| 148 | memcpy(ucpia->workbuff->data + ucpia->workbuff->length, cdata, n); |
| 149 | ucpia->workbuff->length += n; |
| 150 | } else |
| 151 | DBG("Ignoring packet!\n"); |
| 152 | } else { |
| 153 | if (ucpia->workbuff->length > 4 && |
| 154 | 0xff == ucpia->workbuff->data[ucpia->workbuff->length-1] && |
| 155 | 0xff == ucpia->workbuff->data[ucpia->workbuff->length-2] && |
| 156 | 0xff == ucpia->workbuff->data[ucpia->workbuff->length-3] && |
| 157 | 0xff == ucpia->workbuff->data[ucpia->workbuff->length-4]) { |
| 158 | ucpia->workbuff->status = FRAME_READY; |
| 159 | ucpia->curbuff = ucpia->workbuff; |
| 160 | ucpia->workbuff = ucpia->workbuff->next; |
| 161 | ucpia->workbuff->status = FRAME_EMPTY; |
| 162 | ucpia->workbuff->length = 0; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | if (waitqueue_active(&ucpia->wq_stream)) |
| 165 | wake_up_interruptible(&ucpia->wq_stream); |
| 166 | } |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | /* resubmit */ |
| 171 | urb->dev = ucpia->dev; |
| 172 | if ((i = usb_submit_urb(urb, GFP_ATOMIC)) != 0) |
| 173 | printk(KERN_ERR "%s: usb_submit_urb ret %d\n", __FUNCTION__, i); |
| 174 | } |
| 175 | |
| 176 | static int cpia_usb_open(void *privdata) |
| 177 | { |
| 178 | struct usb_cpia *ucpia = (struct usb_cpia *) privdata; |
| 179 | struct urb *urb; |
| 180 | int ret, retval = 0, fx, err; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (!ucpia) |
| 183 | return -EINVAL; |
| 184 | |
| 185 | ucpia->sbuf[0].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); |
| 186 | if (!ucpia->sbuf[0].data) |
| 187 | return -EINVAL; |
| 188 | |
| 189 | ucpia->sbuf[1].data = kmalloc(FRAMES_PER_DESC * FRAME_SIZE_PER_DESC, GFP_KERNEL); |
| 190 | if (!ucpia->sbuf[1].data) { |
| 191 | retval = -EINVAL; |
| 192 | goto error_0; |
| 193 | } |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 194 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | ret = usb_set_interface(ucpia->dev, ucpia->iface, 3); |
| 196 | if (ret < 0) { |
| 197 | printk(KERN_ERR "cpia_usb_open: usb_set_interface error (ret = %d)\n", ret); |
| 198 | retval = -EBUSY; |
| 199 | goto error_1; |
| 200 | } |
| 201 | |
| 202 | ucpia->buffers[0]->status = FRAME_EMPTY; |
| 203 | ucpia->buffers[0]->length = 0; |
| 204 | ucpia->buffers[1]->status = FRAME_EMPTY; |
| 205 | ucpia->buffers[1]->length = 0; |
| 206 | ucpia->buffers[2]->status = FRAME_EMPTY; |
| 207 | ucpia->buffers[2]->length = 0; |
| 208 | ucpia->curbuff = ucpia->buffers[0]; |
| 209 | ucpia->workbuff = ucpia->buffers[1]; |
| 210 | |
| 211 | /* We double buffer the Iso lists, and also know the polling |
| 212 | * interval is every frame (1 == (1 << (bInterval -1))). |
| 213 | */ |
| 214 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); |
| 215 | if (!urb) { |
| 216 | printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 0\n"); |
| 217 | retval = -ENOMEM; |
| 218 | goto error_1; |
| 219 | } |
| 220 | |
| 221 | ucpia->sbuf[0].urb = urb; |
| 222 | urb->dev = ucpia->dev; |
| 223 | urb->context = ucpia; |
| 224 | urb->pipe = usb_rcvisocpipe(ucpia->dev, 1); |
| 225 | urb->transfer_flags = URB_ISO_ASAP; |
| 226 | urb->transfer_buffer = ucpia->sbuf[0].data; |
| 227 | urb->complete = cpia_usb_complete; |
| 228 | urb->number_of_packets = FRAMES_PER_DESC; |
| 229 | urb->interval = 1; |
| 230 | urb->transfer_buffer_length = FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; |
| 231 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { |
| 232 | urb->iso_frame_desc[fx].offset = FRAME_SIZE_PER_DESC * fx; |
| 233 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; |
| 234 | } |
| 235 | |
| 236 | urb = usb_alloc_urb(FRAMES_PER_DESC, GFP_KERNEL); |
| 237 | if (!urb) { |
| 238 | printk(KERN_ERR "cpia_init_isoc: usb_alloc_urb 1\n"); |
| 239 | retval = -ENOMEM; |
| 240 | goto error_urb0; |
| 241 | } |
| 242 | |
| 243 | ucpia->sbuf[1].urb = urb; |
| 244 | urb->dev = ucpia->dev; |
| 245 | urb->context = ucpia; |
| 246 | urb->pipe = usb_rcvisocpipe(ucpia->dev, 1); |
| 247 | urb->transfer_flags = URB_ISO_ASAP; |
| 248 | urb->transfer_buffer = ucpia->sbuf[1].data; |
| 249 | urb->complete = cpia_usb_complete; |
| 250 | urb->number_of_packets = FRAMES_PER_DESC; |
| 251 | urb->interval = 1; |
| 252 | urb->transfer_buffer_length = FRAME_SIZE_PER_DESC * FRAMES_PER_DESC; |
| 253 | for (fx = 0; fx < FRAMES_PER_DESC; fx++) { |
| 254 | urb->iso_frame_desc[fx].offset = FRAME_SIZE_PER_DESC * fx; |
| 255 | urb->iso_frame_desc[fx].length = FRAME_SIZE_PER_DESC; |
| 256 | } |
| 257 | |
| 258 | /* queue the ISO urbs, and resubmit in the completion handler */ |
| 259 | err = usb_submit_urb(ucpia->sbuf[0].urb, GFP_KERNEL); |
| 260 | if (err) { |
| 261 | printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 0 ret %d\n", |
| 262 | err); |
| 263 | goto error_urb1; |
| 264 | } |
| 265 | err = usb_submit_urb(ucpia->sbuf[1].urb, GFP_KERNEL); |
| 266 | if (err) { |
| 267 | printk(KERN_ERR "cpia_init_isoc: usb_submit_urb 1 ret %d\n", |
| 268 | err); |
| 269 | goto error_urb1; |
| 270 | } |
| 271 | |
| 272 | ucpia->streaming = 1; |
| 273 | ucpia->open = 1; |
| 274 | |
| 275 | return 0; |
| 276 | |
| 277 | error_urb1: /* free urb 1 */ |
| 278 | usb_free_urb(ucpia->sbuf[1].urb); |
| 279 | ucpia->sbuf[1].urb = NULL; |
| 280 | error_urb0: /* free urb 0 */ |
| 281 | usb_free_urb(ucpia->sbuf[0].urb); |
| 282 | ucpia->sbuf[0].urb = NULL; |
| 283 | error_1: |
| 284 | kfree (ucpia->sbuf[1].data); |
| 285 | ucpia->sbuf[1].data = NULL; |
| 286 | error_0: |
| 287 | kfree (ucpia->sbuf[0].data); |
| 288 | ucpia->sbuf[0].data = NULL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 289 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | return retval; |
| 291 | } |
| 292 | |
| 293 | // |
| 294 | // convenience functions |
| 295 | // |
| 296 | |
| 297 | /**************************************************************************** |
| 298 | * |
| 299 | * WritePacket |
| 300 | * |
| 301 | ***************************************************************************/ |
| 302 | static int WritePacket(struct usb_device *udev, const u8 *packet, u8 *buf, size_t size) |
| 303 | { |
| 304 | if (!packet) |
| 305 | return -EINVAL; |
| 306 | |
| 307 | return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), |
| 308 | packet[1] + (packet[0] << 8), |
| 309 | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 310 | packet[2] + (packet[3] << 8), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | packet[4] + (packet[5] << 8), buf, size, 1000); |
| 312 | } |
| 313 | |
| 314 | /**************************************************************************** |
| 315 | * |
| 316 | * ReadPacket |
| 317 | * |
| 318 | ***************************************************************************/ |
| 319 | static int ReadPacket(struct usb_device *udev, u8 *packet, u8 *buf, size_t size) |
| 320 | { |
| 321 | if (!packet || size <= 0) |
| 322 | return -EINVAL; |
| 323 | |
| 324 | return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), |
| 325 | packet[1] + (packet[0] << 8), |
| 326 | USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 327 | packet[2] + (packet[3] << 8), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | packet[4] + (packet[5] << 8), buf, size, 1000); |
| 329 | } |
| 330 | |
| 331 | static int cpia_usb_transferCmd(void *privdata, u8 *command, u8 *data) |
| 332 | { |
| 333 | int err = 0; |
| 334 | int databytes; |
| 335 | struct usb_cpia *ucpia = (struct usb_cpia *)privdata; |
| 336 | struct usb_device *udev = ucpia->dev; |
| 337 | |
| 338 | if (!udev) { |
| 339 | DBG("Internal driver error: udev is NULL\n"); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | |
| 343 | if (!command) { |
| 344 | DBG("Internal driver error: command is NULL\n"); |
| 345 | return -EINVAL; |
| 346 | } |
| 347 | |
| 348 | databytes = (((int)command[7])<<8) | command[6]; |
| 349 | |
| 350 | if (command[0] == DATA_IN) { |
| 351 | u8 buffer[8]; |
| 352 | |
| 353 | if (!data) { |
| 354 | DBG("Internal driver error: data is NULL\n"); |
| 355 | return -EINVAL; |
| 356 | } |
| 357 | |
| 358 | err = ReadPacket(udev, command, buffer, 8); |
| 359 | if (err < 0) |
| 360 | return err; |
| 361 | |
| 362 | memcpy(data, buffer, databytes); |
| 363 | } else if(command[0] == DATA_OUT) |
| 364 | WritePacket(udev, command, data, databytes); |
| 365 | else { |
| 366 | DBG("Unexpected first byte of command: %x\n", command[0]); |
| 367 | err = -EINVAL; |
| 368 | } |
| 369 | |
| 370 | return 0; |
| 371 | } |
| 372 | |
| 373 | static int cpia_usb_registerCallback(void *privdata, void (*cb) (void *cbdata), |
| 374 | void *cbdata) |
| 375 | { |
| 376 | return -ENODEV; |
| 377 | } |
| 378 | |
| 379 | static int cpia_usb_streamStart(void *privdata) |
| 380 | { |
| 381 | return -ENODEV; |
| 382 | } |
| 383 | |
| 384 | static int cpia_usb_streamStop(void *privdata) |
| 385 | { |
| 386 | return -ENODEV; |
| 387 | } |
| 388 | |
| 389 | static int cpia_usb_streamRead(void *privdata, u8 *frame, int noblock) |
| 390 | { |
| 391 | struct usb_cpia *ucpia = (struct usb_cpia *) privdata; |
| 392 | struct framebuf *mybuff; |
| 393 | |
| 394 | if (!ucpia || !ucpia->present) |
| 395 | return -1; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 396 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | if (ucpia->curbuff->status != FRAME_READY) |
| 398 | interruptible_sleep_on(&ucpia->wq_stream); |
| 399 | else |
| 400 | DBG("Frame already waiting!\n"); |
| 401 | |
| 402 | mybuff = ucpia->curbuff; |
| 403 | |
| 404 | if (!mybuff) |
| 405 | return -1; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 406 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | if (mybuff->status != FRAME_READY || mybuff->length < 4) { |
| 408 | DBG("Something went wrong!\n"); |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | memcpy(frame, mybuff->data, mybuff->length); |
| 413 | mybuff->status = FRAME_EMPTY; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 414 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | /* DBG("read done, %d bytes, Header: %x/%x, Footer: %x%x%x%x\n", */ |
| 416 | /* mybuff->length, frame[0], frame[1], */ |
| 417 | /* frame[mybuff->length-4], frame[mybuff->length-3], */ |
| 418 | /* frame[mybuff->length-2], frame[mybuff->length-1]); */ |
| 419 | |
| 420 | return mybuff->length; |
| 421 | } |
| 422 | |
| 423 | static void cpia_usb_free_resources(struct usb_cpia *ucpia, int try) |
| 424 | { |
| 425 | if (!ucpia->streaming) |
| 426 | return; |
| 427 | |
| 428 | ucpia->streaming = 0; |
| 429 | |
| 430 | /* Set packet size to 0 */ |
| 431 | if (try) { |
| 432 | int ret; |
| 433 | |
| 434 | ret = usb_set_interface(ucpia->dev, ucpia->iface, 0); |
| 435 | if (ret < 0) { |
| 436 | printk(KERN_ERR "usb_set_interface error (ret = %d)\n", ret); |
| 437 | return; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | /* Unschedule all of the iso td's */ |
| 442 | if (ucpia->sbuf[1].urb) { |
| 443 | usb_kill_urb(ucpia->sbuf[1].urb); |
| 444 | usb_free_urb(ucpia->sbuf[1].urb); |
| 445 | ucpia->sbuf[1].urb = NULL; |
| 446 | } |
| 447 | |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 448 | kfree(ucpia->sbuf[1].data); |
| 449 | ucpia->sbuf[1].data = NULL; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | if (ucpia->sbuf[0].urb) { |
| 452 | usb_kill_urb(ucpia->sbuf[0].urb); |
| 453 | usb_free_urb(ucpia->sbuf[0].urb); |
| 454 | ucpia->sbuf[0].urb = NULL; |
| 455 | } |
| 456 | |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 457 | kfree(ucpia->sbuf[0].data); |
| 458 | ucpia->sbuf[0].data = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | static int cpia_usb_close(void *privdata) |
| 462 | { |
| 463 | struct usb_cpia *ucpia = (struct usb_cpia *) privdata; |
| 464 | |
| 465 | if(!ucpia) |
| 466 | return -ENODEV; |
| 467 | |
| 468 | ucpia->open = 0; |
| 469 | |
| 470 | /* ucpia->present = 0 protects against trying to reset the |
| 471 | * alt setting if camera is physically disconnected while open */ |
| 472 | cpia_usb_free_resources(ucpia, ucpia->present); |
| 473 | |
| 474 | return 0; |
| 475 | } |
| 476 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 477 | /* Probing and initializing */ |
| 478 | |
| 479 | static int cpia_probe(struct usb_interface *intf, |
| 480 | const struct usb_device_id *id) |
| 481 | { |
| 482 | struct usb_device *udev = interface_to_usbdev(intf); |
| 483 | struct usb_host_interface *interface; |
| 484 | struct usb_cpia *ucpia; |
| 485 | struct cam_data *cam; |
| 486 | int ret; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 487 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | /* A multi-config CPiA camera? */ |
| 489 | if (udev->descriptor.bNumConfigurations != 1) |
| 490 | return -ENODEV; |
| 491 | |
| 492 | interface = intf->cur_altsetting; |
| 493 | |
| 494 | printk(KERN_INFO "USB CPiA camera found\n"); |
| 495 | |
Panagiotis Issaris | 7408187 | 2006-01-11 19:40:56 -0200 | [diff] [blame] | 496 | ucpia = kzalloc(sizeof(*ucpia), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | if (!ucpia) { |
| 498 | printk(KERN_ERR "couldn't kmalloc cpia struct\n"); |
| 499 | return -ENOMEM; |
| 500 | } |
| 501 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | ucpia->dev = udev; |
| 503 | ucpia->iface = interface->desc.bInterfaceNumber; |
| 504 | init_waitqueue_head(&ucpia->wq_stream); |
| 505 | |
| 506 | ucpia->buffers[0] = vmalloc(sizeof(*ucpia->buffers[0])); |
| 507 | if (!ucpia->buffers[0]) { |
| 508 | printk(KERN_ERR "couldn't vmalloc frame buffer 0\n"); |
| 509 | goto fail_alloc_0; |
| 510 | } |
| 511 | |
| 512 | ucpia->buffers[1] = vmalloc(sizeof(*ucpia->buffers[1])); |
| 513 | if (!ucpia->buffers[1]) { |
| 514 | printk(KERN_ERR "couldn't vmalloc frame buffer 1\n"); |
| 515 | goto fail_alloc_1; |
| 516 | } |
| 517 | |
| 518 | ucpia->buffers[2] = vmalloc(sizeof(*ucpia->buffers[2])); |
| 519 | if (!ucpia->buffers[2]) { |
| 520 | printk(KERN_ERR "couldn't vmalloc frame buffer 2\n"); |
| 521 | goto fail_alloc_2; |
| 522 | } |
| 523 | |
| 524 | ucpia->buffers[0]->next = ucpia->buffers[1]; |
| 525 | ucpia->buffers[1]->next = ucpia->buffers[2]; |
| 526 | ucpia->buffers[2]->next = ucpia->buffers[0]; |
| 527 | |
| 528 | ret = usb_set_interface(udev, ucpia->iface, 0); |
| 529 | if (ret < 0) { |
| 530 | printk(KERN_ERR "cpia_probe: usb_set_interface error (ret = %d)\n", ret); |
| 531 | /* goto fail_all; */ |
| 532 | } |
| 533 | |
| 534 | /* Before register_camera, important */ |
| 535 | ucpia->present = 1; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | cam = cpia_register_camera(&cpia_usb_ops, ucpia); |
| 538 | if (!cam) { |
| 539 | LOG("failed to cpia_register_camera\n"); |
| 540 | goto fail_all; |
| 541 | } |
| 542 | |
| 543 | spin_lock( &cam_list_lock_usb ); |
| 544 | list_add( &cam->cam_data_list, &cam_list ); |
| 545 | spin_unlock( &cam_list_lock_usb ); |
| 546 | |
| 547 | usb_set_intfdata(intf, cam); |
| 548 | return 0; |
| 549 | |
| 550 | fail_all: |
| 551 | vfree(ucpia->buffers[2]); |
| 552 | ucpia->buffers[2] = NULL; |
| 553 | fail_alloc_2: |
| 554 | vfree(ucpia->buffers[1]); |
| 555 | ucpia->buffers[1] = NULL; |
| 556 | fail_alloc_1: |
| 557 | vfree(ucpia->buffers[0]); |
| 558 | ucpia->buffers[0] = NULL; |
| 559 | fail_alloc_0: |
| 560 | kfree(ucpia); |
| 561 | return -EIO; |
| 562 | } |
| 563 | |
| 564 | static void cpia_disconnect(struct usb_interface *intf); |
| 565 | |
| 566 | static struct usb_device_id cpia_id_table [] = { |
| 567 | { USB_DEVICE(0x0553, 0x0002) }, |
| 568 | { USB_DEVICE(0x0813, 0x0001) }, |
| 569 | { } /* Terminating entry */ |
| 570 | }; |
| 571 | |
| 572 | MODULE_DEVICE_TABLE (usb, cpia_id_table); |
| 573 | MODULE_LICENSE("GPL"); |
| 574 | |
| 575 | |
| 576 | static struct usb_driver cpia_driver = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | .name = "cpia", |
| 578 | .probe = cpia_probe, |
| 579 | .disconnect = cpia_disconnect, |
| 580 | .id_table = cpia_id_table, |
| 581 | }; |
| 582 | |
| 583 | static void cpia_disconnect(struct usb_interface *intf) |
| 584 | { |
| 585 | struct cam_data *cam = usb_get_intfdata(intf); |
| 586 | struct usb_cpia *ucpia; |
| 587 | struct usb_device *udev; |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 588 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | usb_set_intfdata(intf, NULL); |
| 590 | if (!cam) |
| 591 | return; |
| 592 | |
| 593 | ucpia = (struct usb_cpia *) cam->lowlevel_data; |
| 594 | spin_lock( &cam_list_lock_usb ); |
| 595 | list_del(&cam->cam_data_list); |
| 596 | spin_unlock( &cam_list_lock_usb ); |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 597 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | ucpia->present = 0; |
| 599 | |
| 600 | cpia_unregister_camera(cam); |
| 601 | if(ucpia->open) |
| 602 | cpia_usb_close(cam->lowlevel_data); |
| 603 | |
| 604 | ucpia->curbuff->status = FRAME_ERROR; |
| 605 | |
| 606 | if (waitqueue_active(&ucpia->wq_stream)) |
| 607 | wake_up_interruptible(&ucpia->wq_stream); |
| 608 | |
| 609 | udev = interface_to_usbdev(intf); |
| 610 | |
| 611 | ucpia->curbuff = ucpia->workbuff = NULL; |
| 612 | |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 613 | vfree(ucpia->buffers[2]); |
| 614 | ucpia->buffers[2] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 616 | vfree(ucpia->buffers[1]); |
| 617 | ucpia->buffers[1] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
Jesper Juhl | f9101210 | 2005-09-10 00:26:54 -0700 | [diff] [blame] | 619 | vfree(ucpia->buffers[0]); |
| 620 | ucpia->buffers[0] = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 621 | |
| 622 | cam->lowlevel_data = NULL; |
| 623 | kfree(ucpia); |
| 624 | } |
| 625 | |
| 626 | static int __init usb_cpia_init(void) |
| 627 | { |
Mauro Carvalho Chehab | d56410e | 2006-03-25 09:19:53 -0300 | [diff] [blame] | 628 | printk(KERN_INFO "%s v%d.%d.%d\n",ABOUT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | CPIA_USB_MAJ_VER,CPIA_USB_MIN_VER,CPIA_USB_PATCH_VER); |
| 630 | |
| 631 | spin_lock_init(&cam_list_lock_usb); |
| 632 | return usb_register(&cpia_driver); |
| 633 | } |
| 634 | |
| 635 | static void __exit usb_cpia_cleanup(void) |
| 636 | { |
| 637 | usb_deregister(&cpia_driver); |
| 638 | } |
| 639 | |
| 640 | |
| 641 | module_init (usb_cpia_init); |
| 642 | module_exit (usb_cpia_cleanup); |
| 643 | |