1 /* 2 * Driver for the Auvitek USB bridge 3 * 4 * Copyright (c) 2008 Steven Toth <stoth@linuxtv.org> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 20 */ 21 22 #include "au0828.h" 23 24 #include <linux/module.h> 25 #include <linux/slab.h> 26 #include <linux/videodev2.h> 27 #include <media/v4l2-common.h> 28 #include <linux/mutex.h> 29 30 /* Due to enum tuner_pad_index */ 31 #include <media/tuner.h> 32 33 /* 34 * 1 = General debug messages 35 * 2 = USB handling 36 * 4 = I2C related 37 * 8 = Bridge related 38 * 16 = IR related 39 */ 40 int au0828_debug; 41 module_param_named(debug, au0828_debug, int, 0644); 42 MODULE_PARM_DESC(debug, 43 "set debug bitmask: 1=general, 2=USB, 4=I2C, 8=bridge, 16=IR"); 44 45 static unsigned int disable_usb_speed_check; 46 module_param(disable_usb_speed_check, int, 0444); 47 MODULE_PARM_DESC(disable_usb_speed_check, 48 "override min bandwidth requirement of 480M bps"); 49 50 #define _AU0828_BULKPIPE 0x03 51 #define _BULKPIPESIZE 0xffff 52 53 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value, 54 u16 index); 55 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value, 56 u16 index, unsigned char *cp, u16 size); 57 58 /* USB Direction */ 59 #define CMD_REQUEST_IN 0x00 60 #define CMD_REQUEST_OUT 0x01 61 62 u32 au0828_readreg(struct au0828_dev *dev, u16 reg) 63 { 64 u8 result = 0; 65 66 recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1); 67 dprintk(8, "%s(0x%04x) = 0x%02x\n", __func__, reg, result); 68 69 return result; 70 } 71 72 u32 au0828_writereg(struct au0828_dev *dev, u16 reg, u32 val) 73 { 74 dprintk(8, "%s(0x%04x, 0x%02x)\n", __func__, reg, val); 75 return send_control_msg(dev, CMD_REQUEST_OUT, val, reg); 76 } 77 78 static int send_control_msg(struct au0828_dev *dev, u16 request, u32 value, 79 u16 index) 80 { 81 int status = -ENODEV; 82 83 if (dev->usbdev) { 84 85 /* cp must be memory that has been allocated by kmalloc */ 86 status = usb_control_msg(dev->usbdev, 87 usb_sndctrlpipe(dev->usbdev, 0), 88 request, 89 USB_DIR_OUT | USB_TYPE_VENDOR | 90 USB_RECIP_DEVICE, 91 value, index, NULL, 0, 1000); 92 93 status = min(status, 0); 94 95 if (status < 0) { 96 pr_err("%s() Failed sending control message, error %d.\n", 97 __func__, status); 98 } 99 100 } 101 102 return status; 103 } 104 105 static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value, 106 u16 index, unsigned char *cp, u16 size) 107 { 108 int status = -ENODEV; 109 mutex_lock(&dev->mutex); 110 if (dev->usbdev) { 111 status = usb_control_msg(dev->usbdev, 112 usb_rcvctrlpipe(dev->usbdev, 0), 113 request, 114 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_DEVICE, 115 value, index, 116 dev->ctrlmsg, size, 1000); 117 118 status = min(status, 0); 119 120 if (status < 0) { 121 pr_err("%s() Failed receiving control message, error %d.\n", 122 __func__, status); 123 } 124 125 /* the host controller requires heap allocated memory, which 126 is why we didn't just pass "cp" into usb_control_msg */ 127 memcpy(cp, dev->ctrlmsg, size); 128 } 129 mutex_unlock(&dev->mutex); 130 return status; 131 } 132 133 static void au0828_unregister_media_device(struct au0828_dev *dev) 134 { 135 136 #ifdef CONFIG_MEDIA_CONTROLLER 137 if (dev->media_dev) { 138 media_device_unregister(dev->media_dev); 139 media_device_cleanup(dev->media_dev); 140 kfree(dev->media_dev); 141 dev->media_dev = NULL; 142 } 143 #endif 144 } 145 146 static void au0828_usb_release(struct au0828_dev *dev) 147 { 148 au0828_unregister_media_device(dev); 149 150 /* I2C */ 151 au0828_i2c_unregister(dev); 152 153 kfree(dev); 154 } 155 156 #ifdef CONFIG_VIDEO_AU0828_V4L2 157 158 static void au0828_usb_v4l2_media_release(struct au0828_dev *dev) 159 { 160 #ifdef CONFIG_MEDIA_CONTROLLER 161 int i; 162 163 for (i = 0; i < AU0828_MAX_INPUT; i++) { 164 if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED) 165 return; 166 media_device_unregister_entity(&dev->input_ent[i]); 167 } 168 #endif 169 } 170 171 static void au0828_usb_v4l2_release(struct v4l2_device *v4l2_dev) 172 { 173 struct au0828_dev *dev = 174 container_of(v4l2_dev, struct au0828_dev, v4l2_dev); 175 176 v4l2_ctrl_handler_free(&dev->v4l2_ctrl_hdl); 177 v4l2_device_unregister(&dev->v4l2_dev); 178 au0828_usb_v4l2_media_release(dev); 179 au0828_usb_release(dev); 180 } 181 #endif 182 183 static void au0828_usb_disconnect(struct usb_interface *interface) 184 { 185 struct au0828_dev *dev = usb_get_intfdata(interface); 186 187 dprintk(1, "%s()\n", __func__); 188 189 /* there is a small window after disconnect, before 190 dev->usbdev is NULL, for poll (e.g: IR) try to access 191 the device and fill the dmesg with error messages. 192 Set the status so poll routines can check and avoid 193 access after disconnect. 194 */ 195 dev->dev_state = DEV_DISCONNECTED; 196 197 au0828_rc_unregister(dev); 198 /* Digital TV */ 199 au0828_dvb_unregister(dev); 200 201 usb_set_intfdata(interface, NULL); 202 mutex_lock(&dev->mutex); 203 dev->usbdev = NULL; 204 mutex_unlock(&dev->mutex); 205 #ifdef CONFIG_VIDEO_AU0828_V4L2 206 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) { 207 au0828_analog_unregister(dev); 208 v4l2_device_disconnect(&dev->v4l2_dev); 209 v4l2_device_put(&dev->v4l2_dev); 210 /* 211 * No need to call au0828_usb_release() if V4L2 is enabled, 212 * as this is already called via au0828_usb_v4l2_release() 213 */ 214 return; 215 } 216 #endif 217 au0828_usb_release(dev); 218 } 219 220 static int au0828_media_device_init(struct au0828_dev *dev, 221 struct usb_device *udev) 222 { 223 #ifdef CONFIG_MEDIA_CONTROLLER 224 struct media_device *mdev; 225 226 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 227 if (!mdev) 228 return -ENOMEM; 229 230 mdev->dev = &udev->dev; 231 232 if (!dev->board.name) 233 strlcpy(mdev->model, "unknown au0828", sizeof(mdev->model)); 234 else 235 strlcpy(mdev->model, dev->board.name, sizeof(mdev->model)); 236 if (udev->serial) 237 strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); 238 strcpy(mdev->bus_info, udev->devpath); 239 mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); 240 mdev->driver_version = LINUX_VERSION_CODE; 241 242 media_device_init(mdev); 243 244 dev->media_dev = mdev; 245 #endif 246 return 0; 247 } 248 249 250 static int au0828_create_media_graph(struct au0828_dev *dev) 251 { 252 #ifdef CONFIG_MEDIA_CONTROLLER 253 struct media_device *mdev = dev->media_dev; 254 struct media_entity *entity; 255 struct media_entity *tuner = NULL, *decoder = NULL; 256 int i, ret; 257 258 if (!mdev) 259 return 0; 260 261 media_device_for_each_entity(entity, mdev) { 262 switch (entity->function) { 263 case MEDIA_ENT_F_TUNER: 264 tuner = entity; 265 break; 266 case MEDIA_ENT_F_ATV_DECODER: 267 decoder = entity; 268 break; 269 } 270 } 271 272 /* Analog setup, using tuner as a link */ 273 274 /* Something bad happened! */ 275 if (!decoder) 276 return -EINVAL; 277 278 if (tuner) { 279 ret = media_create_pad_link(tuner, TUNER_PAD_OUTPUT, 280 decoder, 0, 281 MEDIA_LNK_FL_ENABLED); 282 if (ret) 283 return ret; 284 } 285 ret = media_create_pad_link(decoder, 1, &dev->vdev.entity, 0, 286 MEDIA_LNK_FL_ENABLED); 287 if (ret) 288 return ret; 289 ret = media_create_pad_link(decoder, 2, &dev->vbi_dev.entity, 0, 290 MEDIA_LNK_FL_ENABLED); 291 if (ret) 292 return ret; 293 294 for (i = 0; i < AU0828_MAX_INPUT; i++) { 295 struct media_entity *ent = &dev->input_ent[i]; 296 297 if (AUVI_INPUT(i).type == AU0828_VMUX_UNDEFINED) 298 break; 299 300 switch (AUVI_INPUT(i).type) { 301 case AU0828_VMUX_CABLE: 302 case AU0828_VMUX_TELEVISION: 303 case AU0828_VMUX_DVB: 304 if (!tuner) 305 break; 306 307 ret = media_create_pad_link(ent, 0, tuner, 308 TUNER_PAD_RF_INPUT, 309 MEDIA_LNK_FL_ENABLED); 310 if (ret) 311 return ret; 312 break; 313 case AU0828_VMUX_COMPOSITE: 314 case AU0828_VMUX_SVIDEO: 315 default: /* AU0828_VMUX_DEBUG */ 316 /* FIXME: fix the decoder PAD */ 317 ret = media_create_pad_link(ent, 0, decoder, 0, 0); 318 if (ret) 319 return ret; 320 break; 321 } 322 } 323 #endif 324 return 0; 325 } 326 327 static int au0828_usb_probe(struct usb_interface *interface, 328 const struct usb_device_id *id) 329 { 330 int ifnum; 331 int retval = 0; 332 333 struct au0828_dev *dev; 334 struct usb_device *usbdev = interface_to_usbdev(interface); 335 336 ifnum = interface->altsetting->desc.bInterfaceNumber; 337 338 if (ifnum != 0) 339 return -ENODEV; 340 341 dprintk(1, "%s() vendor id 0x%x device id 0x%x ifnum:%d\n", __func__, 342 le16_to_cpu(usbdev->descriptor.idVendor), 343 le16_to_cpu(usbdev->descriptor.idProduct), 344 ifnum); 345 346 /* 347 * Make sure we have 480 Mbps of bandwidth, otherwise things like 348 * video stream wouldn't likely work, since 12 Mbps is generally 349 * not enough even for most Digital TV streams. 350 */ 351 if (usbdev->speed != USB_SPEED_HIGH && disable_usb_speed_check == 0) { 352 pr_err("au0828: Device initialization failed.\n"); 353 pr_err("au0828: Device must be connected to a high-speed USB 2.0 port.\n"); 354 return -ENODEV; 355 } 356 357 dev = kzalloc(sizeof(*dev), GFP_KERNEL); 358 if (dev == NULL) { 359 pr_err("%s() Unable to allocate memory\n", __func__); 360 return -ENOMEM; 361 } 362 363 mutex_init(&dev->lock); 364 mutex_lock(&dev->lock); 365 mutex_init(&dev->mutex); 366 mutex_init(&dev->dvb.lock); 367 dev->usbdev = usbdev; 368 dev->boardnr = id->driver_info; 369 dev->board = au0828_boards[dev->boardnr]; 370 371 /* Initialize the media controller */ 372 retval = au0828_media_device_init(dev, usbdev); 373 if (retval) { 374 pr_err("%s() au0828_media_device_init failed\n", 375 __func__); 376 mutex_unlock(&dev->lock); 377 kfree(dev); 378 return retval; 379 } 380 381 #ifdef CONFIG_VIDEO_AU0828_V4L2 382 dev->v4l2_dev.release = au0828_usb_v4l2_release; 383 384 /* Create the v4l2_device */ 385 #ifdef CONFIG_MEDIA_CONTROLLER 386 dev->v4l2_dev.mdev = dev->media_dev; 387 #endif 388 retval = v4l2_device_register(&interface->dev, &dev->v4l2_dev); 389 if (retval) { 390 pr_err("%s() v4l2_device_register failed\n", 391 __func__); 392 mutex_unlock(&dev->lock); 393 kfree(dev); 394 return retval; 395 } 396 /* This control handler will inherit the controls from au8522 */ 397 retval = v4l2_ctrl_handler_init(&dev->v4l2_ctrl_hdl, 4); 398 if (retval) { 399 pr_err("%s() v4l2_ctrl_handler_init failed\n", 400 __func__); 401 mutex_unlock(&dev->lock); 402 kfree(dev); 403 return retval; 404 } 405 dev->v4l2_dev.ctrl_handler = &dev->v4l2_ctrl_hdl; 406 #endif 407 408 /* Power Up the bridge */ 409 au0828_write(dev, REG_600, 1 << 4); 410 411 /* Bring up the GPIO's and supporting devices */ 412 au0828_gpio_setup(dev); 413 414 /* I2C */ 415 au0828_i2c_register(dev); 416 417 /* Setup */ 418 au0828_card_setup(dev); 419 420 #ifdef CONFIG_VIDEO_AU0828_V4L2 421 /* Analog TV */ 422 if (AUVI_INPUT(0).type != AU0828_VMUX_UNDEFINED) 423 au0828_analog_register(dev, interface); 424 #endif 425 426 /* Digital TV */ 427 retval = au0828_dvb_register(dev); 428 if (retval) 429 pr_err("%s() au0282_dev_register failed\n", 430 __func__); 431 432 /* Remote controller */ 433 au0828_rc_register(dev); 434 435 /* 436 * Store the pointer to the au0828_dev so it can be accessed in 437 * au0828_usb_disconnect 438 */ 439 usb_set_intfdata(interface, dev); 440 441 pr_info("Registered device AU0828 [%s]\n", 442 dev->board.name == NULL ? "Unset" : dev->board.name); 443 444 mutex_unlock(&dev->lock); 445 446 retval = au0828_create_media_graph(dev); 447 if (retval) { 448 pr_err("%s() au0282_dev_register failed to create graph\n", 449 __func__); 450 goto done; 451 } 452 453 #ifdef CONFIG_MEDIA_CONTROLLER 454 retval = media_device_register(dev->media_dev); 455 #endif 456 457 done: 458 if (retval < 0) 459 au0828_usb_disconnect(interface); 460 461 return retval; 462 } 463 464 static int au0828_suspend(struct usb_interface *interface, 465 pm_message_t message) 466 { 467 struct au0828_dev *dev = usb_get_intfdata(interface); 468 469 if (!dev) 470 return 0; 471 472 pr_info("Suspend\n"); 473 474 au0828_rc_suspend(dev); 475 au0828_v4l2_suspend(dev); 476 au0828_dvb_suspend(dev); 477 478 /* FIXME: should suspend also ATV/DTV */ 479 480 return 0; 481 } 482 483 static int au0828_resume(struct usb_interface *interface) 484 { 485 struct au0828_dev *dev = usb_get_intfdata(interface); 486 if (!dev) 487 return 0; 488 489 pr_info("Resume\n"); 490 491 /* Power Up the bridge */ 492 au0828_write(dev, REG_600, 1 << 4); 493 494 /* Bring up the GPIO's and supporting devices */ 495 au0828_gpio_setup(dev); 496 497 au0828_rc_resume(dev); 498 au0828_v4l2_resume(dev); 499 au0828_dvb_resume(dev); 500 501 /* FIXME: should resume also ATV/DTV */ 502 503 return 0; 504 } 505 506 static struct usb_driver au0828_usb_driver = { 507 .name = KBUILD_MODNAME, 508 .probe = au0828_usb_probe, 509 .disconnect = au0828_usb_disconnect, 510 .id_table = au0828_usb_id_table, 511 .suspend = au0828_suspend, 512 .resume = au0828_resume, 513 .reset_resume = au0828_resume, 514 }; 515 516 static int __init au0828_init(void) 517 { 518 int ret; 519 520 if (au0828_debug & 1) 521 pr_info("%s() Debugging is enabled\n", __func__); 522 523 if (au0828_debug & 2) 524 pr_info("%s() USB Debugging is enabled\n", __func__); 525 526 if (au0828_debug & 4) 527 pr_info("%s() I2C Debugging is enabled\n", __func__); 528 529 if (au0828_debug & 8) 530 pr_info("%s() Bridge Debugging is enabled\n", 531 __func__); 532 533 if (au0828_debug & 16) 534 pr_info("%s() IR Debugging is enabled\n", 535 __func__); 536 537 pr_info("au0828 driver loaded\n"); 538 539 ret = usb_register(&au0828_usb_driver); 540 if (ret) 541 pr_err("usb_register failed, error = %d\n", ret); 542 543 return ret; 544 } 545 546 static void __exit au0828_exit(void) 547 { 548 usb_deregister(&au0828_usb_driver); 549 } 550 551 module_init(au0828_init); 552 module_exit(au0828_exit); 553 554 MODULE_DESCRIPTION("Driver for Auvitek AU0828 based products"); 555 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>"); 556 MODULE_LICENSE("GPL"); 557 MODULE_VERSION("0.0.3"); 558