1 /* 2 * drivers/media/radio/si470x/radio-si470x-usb.c 3 * 4 * USB driver for radios with Silicon Labs Si470x FM Radio Receivers 5 * 6 * Copyright (c) 2009 Tobias Lorenz <tobias.lorenz@gmx.net> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21 */ 22 23 24 /* 25 * ToDo: 26 * - add firmware download/update support 27 */ 28 29 30 /* driver definitions */ 31 #define DRIVER_AUTHOR "Tobias Lorenz <tobias.lorenz@gmx.net>" 32 #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver" 33 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers" 34 #define DRIVER_VERSION "1.0.10" 35 36 /* kernel includes */ 37 #include <linux/usb.h> 38 #include <linux/hid.h> 39 #include <linux/slab.h> 40 41 #include "radio-si470x.h" 42 43 44 /* USB Device ID List */ 45 static struct usb_device_id si470x_usb_driver_id_table[] = { 46 /* Silicon Labs USB FM Radio Reference Design */ 47 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) }, 48 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */ 49 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) }, 50 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */ 51 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) }, 52 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */ 53 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) }, 54 /* Axentia ALERT FM USB Receiver */ 55 { USB_DEVICE_AND_INTERFACE_INFO(0x12cf, 0x7111, USB_CLASS_HID, 0, 0) }, 56 /* Terminating entry */ 57 { } 58 }; 59 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table); 60 61 62 63 /************************************************************************** 64 * Module Parameters 65 **************************************************************************/ 66 67 /* Radio Nr */ 68 static int radio_nr = -1; 69 module_param(radio_nr, int, 0444); 70 MODULE_PARM_DESC(radio_nr, "Radio Nr"); 71 72 /* USB timeout */ 73 static unsigned int usb_timeout = 500; 74 module_param(usb_timeout, uint, 0644); 75 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); 76 77 /* RDS buffer blocks */ 78 static unsigned int rds_buf = 100; 79 module_param(rds_buf, uint, 0444); 80 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); 81 82 /* RDS maximum block errors */ 83 static unsigned short max_rds_errors = 1; 84 /* 0 means 0 errors requiring correction */ 85 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ 86 /* 2 means 3-5 errors requiring correction */ 87 /* 3 means 6+ errors or errors in checkword, correction not possible */ 88 module_param(max_rds_errors, ushort, 0644); 89 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); 90 91 92 93 /************************************************************************** 94 * USB HID Reports 95 **************************************************************************/ 96 97 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */ 98 /* with the (REPORT_ID - 1) corresponding to the register address across USB */ 99 /* endpoint 0 using GET_REPORT and SET_REPORT */ 100 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) 101 #define REGISTER_REPORT(reg) ((reg) + 1) 102 103 /* Report 17 gives direct read/write access to the entire Si470x register */ 104 /* map across endpoint 0 using GET_REPORT and SET_REPORT */ 105 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 106 #define ENTIRE_REPORT 17 107 108 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */ 109 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */ 110 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 111 #define RDS_REPORT 18 112 113 /* Report 19: LED state */ 114 #define LED_REPORT_SIZE 3 115 #define LED_REPORT 19 116 117 /* Report 19: stream */ 118 #define STREAM_REPORT_SIZE 3 119 #define STREAM_REPORT 19 120 121 /* Report 20: scratch */ 122 #define SCRATCH_PAGE_SIZE 63 123 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) 124 #define SCRATCH_REPORT 20 125 126 /* Reports 19-22: flash upgrade of the C8051F321 */ 127 #define WRITE_REPORT_SIZE 4 128 #define WRITE_REPORT 19 129 #define FLASH_REPORT_SIZE 64 130 #define FLASH_REPORT 20 131 #define CRC_REPORT_SIZE 3 132 #define CRC_REPORT 21 133 #define RESPONSE_REPORT_SIZE 2 134 #define RESPONSE_REPORT 22 135 136 /* Report 23: currently unused, but can accept 60 byte reports on the HID */ 137 /* interrupt out endpoint 2 every 1 millisecond */ 138 #define UNUSED_REPORT 23 139 140 #define MAX_REPORT_SIZE 64 141 142 143 144 /************************************************************************** 145 * Software/Hardware Versions from Scratch Page 146 **************************************************************************/ 147 #define RADIO_HW_VERSION 1 148 149 150 151 /************************************************************************** 152 * LED State Definitions 153 **************************************************************************/ 154 #define LED_COMMAND 0x35 155 156 #define NO_CHANGE_LED 0x00 157 #define ALL_COLOR_LED 0x01 /* streaming state */ 158 #define BLINK_GREEN_LED 0x02 /* connect state */ 159 #define BLINK_RED_LED 0x04 160 #define BLINK_ORANGE_LED 0x10 /* disconnect state */ 161 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ 162 #define SOLID_RED_LED 0x40 /* bootload state */ 163 #define SOLID_ORANGE_LED 0x80 164 165 166 167 /************************************************************************** 168 * Stream State Definitions 169 **************************************************************************/ 170 #define STREAM_COMMAND 0x36 171 #define STREAM_VIDPID 0x00 172 #define STREAM_AUDIO 0xff 173 174 175 176 /************************************************************************** 177 * Bootloader / Flash Commands 178 **************************************************************************/ 179 180 /* unique id sent to bootloader and required to put into a bootload state */ 181 #define UNIQUE_BL_ID 0x34 182 183 /* mask for the flash data */ 184 #define FLASH_DATA_MASK 0x55 185 186 /* bootloader commands */ 187 #define GET_SW_VERSION_COMMAND 0x00 188 #define SET_PAGE_COMMAND 0x01 189 #define ERASE_PAGE_COMMAND 0x02 190 #define WRITE_PAGE_COMMAND 0x03 191 #define CRC_ON_PAGE_COMMAND 0x04 192 #define READ_FLASH_BYTE_COMMAND 0x05 193 #define RESET_DEVICE_COMMAND 0x06 194 #define GET_HW_VERSION_COMMAND 0x07 195 #define BLANK 0xff 196 197 /* bootloader command responses */ 198 #define COMMAND_OK 0x01 199 #define COMMAND_FAILED 0x02 200 #define COMMAND_PENDING 0x03 201 202 203 204 /************************************************************************** 205 * General Driver Functions - REGISTER_REPORTs 206 **************************************************************************/ 207 208 /* 209 * si470x_get_report - receive a HID report 210 */ 211 static int si470x_get_report(struct si470x_device *radio, void *buf, int size) 212 { 213 unsigned char *report = buf; 214 int retval; 215 216 retval = usb_control_msg(radio->usbdev, 217 usb_rcvctrlpipe(radio->usbdev, 0), 218 HID_REQ_GET_REPORT, 219 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 220 report[0], 2, 221 buf, size, usb_timeout); 222 223 if (retval < 0) 224 dev_warn(&radio->intf->dev, 225 "si470x_get_report: usb_control_msg returned %d\n", 226 retval); 227 return retval; 228 } 229 230 231 /* 232 * si470x_set_report - send a HID report 233 */ 234 static int si470x_set_report(struct si470x_device *radio, void *buf, int size) 235 { 236 unsigned char *report = buf; 237 int retval; 238 239 retval = usb_control_msg(radio->usbdev, 240 usb_sndctrlpipe(radio->usbdev, 0), 241 HID_REQ_SET_REPORT, 242 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, 243 report[0], 2, 244 buf, size, usb_timeout); 245 246 if (retval < 0) 247 dev_warn(&radio->intf->dev, 248 "si470x_set_report: usb_control_msg returned %d\n", 249 retval); 250 return retval; 251 } 252 253 254 /* 255 * si470x_get_register - read register 256 */ 257 int si470x_get_register(struct si470x_device *radio, int regnr) 258 { 259 int retval; 260 261 radio->usb_buf[0] = REGISTER_REPORT(regnr); 262 263 retval = si470x_get_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); 264 265 if (retval >= 0) 266 radio->registers[regnr] = get_unaligned_be16(&radio->usb_buf[1]); 267 268 return (retval < 0) ? -EINVAL : 0; 269 } 270 271 272 /* 273 * si470x_set_register - write register 274 */ 275 int si470x_set_register(struct si470x_device *radio, int regnr) 276 { 277 int retval; 278 279 radio->usb_buf[0] = REGISTER_REPORT(regnr); 280 put_unaligned_be16(radio->registers[regnr], &radio->usb_buf[1]); 281 282 retval = si470x_set_report(radio, radio->usb_buf, REGISTER_REPORT_SIZE); 283 284 return (retval < 0) ? -EINVAL : 0; 285 } 286 287 288 289 /************************************************************************** 290 * General Driver Functions - ENTIRE_REPORT 291 **************************************************************************/ 292 293 /* 294 * si470x_get_all_registers - read entire registers 295 */ 296 static int si470x_get_all_registers(struct si470x_device *radio) 297 { 298 int retval; 299 unsigned char regnr; 300 301 radio->usb_buf[0] = ENTIRE_REPORT; 302 303 retval = si470x_get_report(radio, radio->usb_buf, ENTIRE_REPORT_SIZE); 304 305 if (retval >= 0) 306 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) 307 radio->registers[regnr] = get_unaligned_be16( 308 &radio->usb_buf[regnr * RADIO_REGISTER_SIZE + 1]); 309 310 return (retval < 0) ? -EINVAL : 0; 311 } 312 313 314 315 /************************************************************************** 316 * General Driver Functions - LED_REPORT 317 **************************************************************************/ 318 319 /* 320 * si470x_set_led_state - sets the led state 321 */ 322 static int si470x_set_led_state(struct si470x_device *radio, 323 unsigned char led_state) 324 { 325 int retval; 326 327 radio->usb_buf[0] = LED_REPORT; 328 radio->usb_buf[1] = LED_COMMAND; 329 radio->usb_buf[2] = led_state; 330 331 retval = si470x_set_report(radio, radio->usb_buf, LED_REPORT_SIZE); 332 333 return (retval < 0) ? -EINVAL : 0; 334 } 335 336 337 338 /************************************************************************** 339 * General Driver Functions - SCRATCH_REPORT 340 **************************************************************************/ 341 342 /* 343 * si470x_get_scratch_versions - gets the scratch page and version infos 344 */ 345 static int si470x_get_scratch_page_versions(struct si470x_device *radio) 346 { 347 int retval; 348 349 radio->usb_buf[0] = SCRATCH_REPORT; 350 351 retval = si470x_get_report(radio, radio->usb_buf, SCRATCH_REPORT_SIZE); 352 353 if (retval < 0) 354 dev_warn(&radio->intf->dev, "si470x_get_scratch: " 355 "si470x_get_report returned %d\n", retval); 356 else { 357 radio->software_version = radio->usb_buf[1]; 358 radio->hardware_version = radio->usb_buf[2]; 359 } 360 361 return (retval < 0) ? -EINVAL : 0; 362 } 363 364 365 366 /************************************************************************** 367 * RDS Driver Functions 368 **************************************************************************/ 369 370 /* 371 * si470x_int_in_callback - rds callback and processing function 372 * 373 * TODO: do we need to use mutex locks in some sections? 374 */ 375 static void si470x_int_in_callback(struct urb *urb) 376 { 377 struct si470x_device *radio = urb->context; 378 int retval; 379 unsigned char regnr; 380 unsigned char blocknum; 381 unsigned short bler; /* rds block errors */ 382 unsigned short rds; 383 unsigned char tmpbuf[3]; 384 385 if (urb->status) { 386 if (urb->status == -ENOENT || 387 urb->status == -ECONNRESET || 388 urb->status == -ESHUTDOWN) { 389 return; 390 } else { 391 dev_warn(&radio->intf->dev, 392 "non-zero urb status (%d)\n", urb->status); 393 goto resubmit; /* Maybe we can recover. */ 394 } 395 } 396 397 /* Sometimes the device returns len 0 packets */ 398 if (urb->actual_length != RDS_REPORT_SIZE) 399 goto resubmit; 400 401 radio->registers[STATUSRSSI] = 402 get_unaligned_be16(&radio->int_in_buffer[1]); 403 404 if (radio->registers[STATUSRSSI] & STATUSRSSI_STC) 405 complete(&radio->completion); 406 407 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS)) { 408 /* Update RDS registers with URB data */ 409 for (regnr = 1; regnr < RDS_REGISTER_NUM; regnr++) 410 radio->registers[STATUSRSSI + regnr] = 411 get_unaligned_be16(&radio->int_in_buffer[ 412 regnr * RADIO_REGISTER_SIZE + 1]); 413 /* get rds blocks */ 414 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) { 415 /* No RDS group ready, better luck next time */ 416 goto resubmit; 417 } 418 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) { 419 /* RDS decoder not synchronized */ 420 goto resubmit; 421 } 422 for (blocknum = 0; blocknum < 4; blocknum++) { 423 switch (blocknum) { 424 default: 425 bler = (radio->registers[STATUSRSSI] & 426 STATUSRSSI_BLERA) >> 9; 427 rds = radio->registers[RDSA]; 428 break; 429 case 1: 430 bler = (radio->registers[READCHAN] & 431 READCHAN_BLERB) >> 14; 432 rds = radio->registers[RDSB]; 433 break; 434 case 2: 435 bler = (radio->registers[READCHAN] & 436 READCHAN_BLERC) >> 12; 437 rds = radio->registers[RDSC]; 438 break; 439 case 3: 440 bler = (radio->registers[READCHAN] & 441 READCHAN_BLERD) >> 10; 442 rds = radio->registers[RDSD]; 443 break; 444 } 445 446 /* Fill the V4L2 RDS buffer */ 447 put_unaligned_le16(rds, &tmpbuf); 448 tmpbuf[2] = blocknum; /* offset name */ 449 tmpbuf[2] |= blocknum << 3; /* received offset */ 450 if (bler > max_rds_errors) 451 tmpbuf[2] |= 0x80; /* uncorrectable errors */ 452 else if (bler > 0) 453 tmpbuf[2] |= 0x40; /* corrected error(s) */ 454 455 /* copy RDS block to internal buffer */ 456 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3); 457 radio->wr_index += 3; 458 459 /* wrap write pointer */ 460 if (radio->wr_index >= radio->buf_size) 461 radio->wr_index = 0; 462 463 /* check for overflow */ 464 if (radio->wr_index == radio->rd_index) { 465 /* increment and wrap read pointer */ 466 radio->rd_index += 3; 467 if (radio->rd_index >= radio->buf_size) 468 radio->rd_index = 0; 469 } 470 } 471 if (radio->wr_index != radio->rd_index) 472 wake_up_interruptible(&radio->read_queue); 473 } 474 475 resubmit: 476 /* Resubmit if we're still running. */ 477 if (radio->int_in_running && radio->usbdev) { 478 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC); 479 if (retval) { 480 dev_warn(&radio->intf->dev, 481 "resubmitting urb failed (%d)", retval); 482 radio->int_in_running = 0; 483 } 484 } 485 radio->status_rssi_auto_update = radio->int_in_running; 486 } 487 488 489 int si470x_fops_open(struct file *file) 490 { 491 return v4l2_fh_open(file); 492 } 493 494 int si470x_fops_release(struct file *file) 495 { 496 return v4l2_fh_release(file); 497 } 498 499 static void si470x_usb_release(struct v4l2_device *v4l2_dev) 500 { 501 struct si470x_device *radio = 502 container_of(v4l2_dev, struct si470x_device, v4l2_dev); 503 504 usb_free_urb(radio->int_in_urb); 505 v4l2_ctrl_handler_free(&radio->hdl); 506 v4l2_device_unregister(&radio->v4l2_dev); 507 kfree(radio->int_in_buffer); 508 kfree(radio->buffer); 509 kfree(radio->usb_buf); 510 kfree(radio); 511 } 512 513 514 /************************************************************************** 515 * Video4Linux Interface 516 **************************************************************************/ 517 518 /* 519 * si470x_vidioc_querycap - query device capabilities 520 */ 521 int si470x_vidioc_querycap(struct file *file, void *priv, 522 struct v4l2_capability *capability) 523 { 524 struct si470x_device *radio = video_drvdata(file); 525 526 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver)); 527 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); 528 usb_make_path(radio->usbdev, capability->bus_info, 529 sizeof(capability->bus_info)); 530 capability->device_caps = V4L2_CAP_HW_FREQ_SEEK | V4L2_CAP_READWRITE | 531 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; 532 capability->capabilities = capability->device_caps | V4L2_CAP_DEVICE_CAPS; 533 return 0; 534 } 535 536 537 static int si470x_start_usb(struct si470x_device *radio) 538 { 539 int retval; 540 541 /* initialize interrupt urb */ 542 usb_fill_int_urb(radio->int_in_urb, radio->usbdev, 543 usb_rcvintpipe(radio->usbdev, 544 radio->int_in_endpoint->bEndpointAddress), 545 radio->int_in_buffer, 546 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize), 547 si470x_int_in_callback, 548 radio, 549 radio->int_in_endpoint->bInterval); 550 551 radio->int_in_running = 1; 552 mb(); 553 554 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL); 555 if (retval) { 556 dev_info(&radio->intf->dev, 557 "submitting int urb failed (%d)\n", retval); 558 radio->int_in_running = 0; 559 } 560 radio->status_rssi_auto_update = radio->int_in_running; 561 562 /* start radio */ 563 retval = si470x_start(radio); 564 if (retval < 0) 565 return retval; 566 567 v4l2_ctrl_handler_setup(&radio->hdl); 568 569 return retval; 570 } 571 572 /************************************************************************** 573 * USB Interface 574 **************************************************************************/ 575 576 /* 577 * si470x_usb_driver_probe - probe for the device 578 */ 579 static int si470x_usb_driver_probe(struct usb_interface *intf, 580 const struct usb_device_id *id) 581 { 582 struct si470x_device *radio; 583 struct usb_host_interface *iface_desc; 584 struct usb_endpoint_descriptor *endpoint; 585 int i, int_end_size, retval = 0; 586 unsigned char version_warning = 0; 587 588 /* private data allocation and initialization */ 589 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); 590 if (!radio) { 591 retval = -ENOMEM; 592 goto err_initial; 593 } 594 radio->usb_buf = kmalloc(MAX_REPORT_SIZE, GFP_KERNEL); 595 if (radio->usb_buf == NULL) { 596 retval = -ENOMEM; 597 goto err_radio; 598 } 599 radio->usbdev = interface_to_usbdev(intf); 600 radio->intf = intf; 601 radio->band = 1; /* Default to 76 - 108 MHz */ 602 mutex_init(&radio->lock); 603 init_completion(&radio->completion); 604 605 iface_desc = intf->cur_altsetting; 606 607 /* Set up interrupt endpoint information. */ 608 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 609 endpoint = &iface_desc->endpoint[i].desc; 610 if (usb_endpoint_is_int_in(endpoint)) 611 radio->int_in_endpoint = endpoint; 612 } 613 if (!radio->int_in_endpoint) { 614 dev_info(&intf->dev, "could not find interrupt in endpoint\n"); 615 retval = -EIO; 616 goto err_usbbuf; 617 } 618 619 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize); 620 621 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL); 622 if (!radio->int_in_buffer) { 623 dev_info(&intf->dev, "could not allocate int_in_buffer"); 624 retval = -ENOMEM; 625 goto err_usbbuf; 626 } 627 628 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); 629 if (!radio->int_in_urb) { 630 dev_info(&intf->dev, "could not allocate int_in_urb"); 631 retval = -ENOMEM; 632 goto err_intbuffer; 633 } 634 635 radio->v4l2_dev.release = si470x_usb_release; 636 637 /* 638 * The si470x SiLabs reference design uses the same USB IDs as 639 * 'Thanko's Raremono' si4734 based receiver. So check here which we 640 * have: attempt to read the device ID from the si470x: the lower 12 641 * bits should be 0x0242 for the si470x. 642 * 643 * We use this check to determine which device we are dealing with. 644 */ 645 if (id->idVendor == 0x10c4 && id->idProduct == 0x818a) { 646 retval = usb_control_msg(radio->usbdev, 647 usb_rcvctrlpipe(radio->usbdev, 0), 648 HID_REQ_GET_REPORT, 649 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 650 1, 2, 651 radio->usb_buf, 3, 500); 652 if (retval != 3 || 653 (get_unaligned_be16(&radio->usb_buf[1]) & 0xfff) != 0x0242) { 654 dev_info(&intf->dev, "this is not a si470x device.\n"); 655 retval = -ENODEV; 656 goto err_urb; 657 } 658 } 659 660 retval = v4l2_device_register(&intf->dev, &radio->v4l2_dev); 661 if (retval < 0) { 662 dev_err(&intf->dev, "couldn't register v4l2_device\n"); 663 goto err_urb; 664 } 665 666 v4l2_ctrl_handler_init(&radio->hdl, 2); 667 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops, 668 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 1); 669 v4l2_ctrl_new_std(&radio->hdl, &si470x_ctrl_ops, 670 V4L2_CID_AUDIO_VOLUME, 0, 15, 1, 15); 671 if (radio->hdl.error) { 672 retval = radio->hdl.error; 673 dev_err(&intf->dev, "couldn't register control\n"); 674 goto err_dev; 675 } 676 radio->videodev = si470x_viddev_template; 677 radio->videodev.ctrl_handler = &radio->hdl; 678 radio->videodev.lock = &radio->lock; 679 radio->videodev.v4l2_dev = &radio->v4l2_dev; 680 radio->videodev.release = video_device_release_empty; 681 video_set_drvdata(&radio->videodev, radio); 682 683 /* get device and chip versions */ 684 if (si470x_get_all_registers(radio) < 0) { 685 retval = -EIO; 686 goto err_ctrl; 687 } 688 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", 689 radio->registers[DEVICEID], radio->registers[CHIPID]); 690 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) { 691 dev_warn(&intf->dev, 692 "This driver is known to work with " 693 "firmware version %hu,\n", RADIO_FW_VERSION); 694 dev_warn(&intf->dev, 695 "but the device has firmware version %hu.\n", 696 radio->registers[CHIPID] & CHIPID_FIRMWARE); 697 version_warning = 1; 698 } 699 700 /* get software and hardware versions */ 701 if (si470x_get_scratch_page_versions(radio) < 0) { 702 retval = -EIO; 703 goto err_ctrl; 704 } 705 dev_info(&intf->dev, "software version %d, hardware version %d\n", 706 radio->software_version, radio->hardware_version); 707 if (radio->hardware_version < RADIO_HW_VERSION) { 708 dev_warn(&intf->dev, 709 "This driver is known to work with " 710 "hardware version %hu,\n", RADIO_HW_VERSION); 711 dev_warn(&intf->dev, 712 "but the device has hardware version %hu.\n", 713 radio->hardware_version); 714 version_warning = 1; 715 } 716 717 /* give out version warning */ 718 if (version_warning == 1) { 719 dev_warn(&intf->dev, 720 "If you have some trouble using this driver,\n"); 721 dev_warn(&intf->dev, 722 "please report to V4L ML at " 723 "linux-media@vger.kernel.org\n"); 724 } 725 726 /* set led to connect state */ 727 si470x_set_led_state(radio, BLINK_GREEN_LED); 728 729 /* rds buffer allocation */ 730 radio->buf_size = rds_buf * 3; 731 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL); 732 if (!radio->buffer) { 733 retval = -EIO; 734 goto err_ctrl; 735 } 736 737 /* rds buffer configuration */ 738 radio->wr_index = 0; 739 radio->rd_index = 0; 740 init_waitqueue_head(&radio->read_queue); 741 usb_set_intfdata(intf, radio); 742 743 /* start radio */ 744 retval = si470x_start_usb(radio); 745 if (retval < 0) 746 goto err_all; 747 748 /* set initial frequency */ 749 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ 750 751 /* register video device */ 752 retval = video_register_device(&radio->videodev, VFL_TYPE_RADIO, 753 radio_nr); 754 if (retval) { 755 dev_err(&intf->dev, "Could not register video device\n"); 756 goto err_all; 757 } 758 759 return 0; 760 err_all: 761 kfree(radio->buffer); 762 err_ctrl: 763 v4l2_ctrl_handler_free(&radio->hdl); 764 err_dev: 765 v4l2_device_unregister(&radio->v4l2_dev); 766 err_urb: 767 usb_free_urb(radio->int_in_urb); 768 err_intbuffer: 769 kfree(radio->int_in_buffer); 770 err_usbbuf: 771 kfree(radio->usb_buf); 772 err_radio: 773 kfree(radio); 774 err_initial: 775 return retval; 776 } 777 778 779 /* 780 * si470x_usb_driver_suspend - suspend the device 781 */ 782 static int si470x_usb_driver_suspend(struct usb_interface *intf, 783 pm_message_t message) 784 { 785 struct si470x_device *radio = usb_get_intfdata(intf); 786 787 dev_info(&intf->dev, "suspending now...\n"); 788 789 /* shutdown interrupt handler */ 790 if (radio->int_in_running) { 791 radio->int_in_running = 0; 792 if (radio->int_in_urb) 793 usb_kill_urb(radio->int_in_urb); 794 } 795 796 /* cancel read processes */ 797 wake_up_interruptible(&radio->read_queue); 798 799 /* stop radio */ 800 si470x_stop(radio); 801 return 0; 802 } 803 804 805 /* 806 * si470x_usb_driver_resume - resume the device 807 */ 808 static int si470x_usb_driver_resume(struct usb_interface *intf) 809 { 810 struct si470x_device *radio = usb_get_intfdata(intf); 811 int ret; 812 813 dev_info(&intf->dev, "resuming now...\n"); 814 815 /* start radio */ 816 ret = si470x_start_usb(radio); 817 if (ret == 0) 818 v4l2_ctrl_handler_setup(&radio->hdl); 819 820 return ret; 821 } 822 823 824 /* 825 * si470x_usb_driver_disconnect - disconnect the device 826 */ 827 static void si470x_usb_driver_disconnect(struct usb_interface *intf) 828 { 829 struct si470x_device *radio = usb_get_intfdata(intf); 830 831 mutex_lock(&radio->lock); 832 v4l2_device_disconnect(&radio->v4l2_dev); 833 video_unregister_device(&radio->videodev); 834 usb_set_intfdata(intf, NULL); 835 mutex_unlock(&radio->lock); 836 v4l2_device_put(&radio->v4l2_dev); 837 } 838 839 840 /* 841 * si470x_usb_driver - usb driver interface 842 * 843 * A note on suspend/resume: this driver had only empty suspend/resume 844 * functions, and when I tried to test suspend/resume it always disconnected 845 * instead of resuming (using my ADS InstantFM stick). So I've decided to 846 * remove these callbacks until someone else with better hardware can 847 * implement and test this. 848 */ 849 static struct usb_driver si470x_usb_driver = { 850 .name = DRIVER_NAME, 851 .probe = si470x_usb_driver_probe, 852 .disconnect = si470x_usb_driver_disconnect, 853 .suspend = si470x_usb_driver_suspend, 854 .resume = si470x_usb_driver_resume, 855 .reset_resume = si470x_usb_driver_resume, 856 .id_table = si470x_usb_driver_id_table, 857 }; 858 859 module_usb_driver(si470x_usb_driver); 860 861 MODULE_LICENSE("GPL"); 862 MODULE_AUTHOR(DRIVER_AUTHOR); 863 MODULE_DESCRIPTION(DRIVER_DESC); 864 MODULE_VERSION(DRIVER_VERSION); 865