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 /* Terminating entry */ 55 { } 56 }; 57 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table); 58 59 60 61 /************************************************************************** 62 * Module Parameters 63 **************************************************************************/ 64 65 /* Radio Nr */ 66 static int radio_nr = -1; 67 module_param(radio_nr, int, 0444); 68 MODULE_PARM_DESC(radio_nr, "Radio Nr"); 69 70 /* USB timeout */ 71 static unsigned int usb_timeout = 500; 72 module_param(usb_timeout, uint, 0644); 73 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); 74 75 /* RDS buffer blocks */ 76 static unsigned int rds_buf = 100; 77 module_param(rds_buf, uint, 0444); 78 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); 79 80 /* RDS maximum block errors */ 81 static unsigned short max_rds_errors = 1; 82 /* 0 means 0 errors requiring correction */ 83 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ 84 /* 2 means 3-5 errors requiring correction */ 85 /* 3 means 6+ errors or errors in checkword, correction not possible */ 86 module_param(max_rds_errors, ushort, 0644); 87 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); 88 89 90 91 /************************************************************************** 92 * USB HID Reports 93 **************************************************************************/ 94 95 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */ 96 /* with the (REPORT_ID - 1) corresponding to the register address across USB */ 97 /* endpoint 0 using GET_REPORT and SET_REPORT */ 98 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) 99 #define REGISTER_REPORT(reg) ((reg) + 1) 100 101 /* Report 17 gives direct read/write access to the entire Si470x register */ 102 /* map across endpoint 0 using GET_REPORT and SET_REPORT */ 103 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 104 #define ENTIRE_REPORT 17 105 106 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */ 107 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */ 108 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 109 #define RDS_REPORT 18 110 111 /* Report 19: LED state */ 112 #define LED_REPORT_SIZE 3 113 #define LED_REPORT 19 114 115 /* Report 19: stream */ 116 #define STREAM_REPORT_SIZE 3 117 #define STREAM_REPORT 19 118 119 /* Report 20: scratch */ 120 #define SCRATCH_PAGE_SIZE 63 121 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) 122 #define SCRATCH_REPORT 20 123 124 /* Reports 19-22: flash upgrade of the C8051F321 */ 125 #define WRITE_REPORT_SIZE 4 126 #define WRITE_REPORT 19 127 #define FLASH_REPORT_SIZE 64 128 #define FLASH_REPORT 20 129 #define CRC_REPORT_SIZE 3 130 #define CRC_REPORT 21 131 #define RESPONSE_REPORT_SIZE 2 132 #define RESPONSE_REPORT 22 133 134 /* Report 23: currently unused, but can accept 60 byte reports on the HID */ 135 /* interrupt out endpoint 2 every 1 millisecond */ 136 #define UNUSED_REPORT 23 137 138 139 140 /************************************************************************** 141 * Software/Hardware Versions from Scratch Page 142 **************************************************************************/ 143 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6 144 #define RADIO_SW_VERSION 7 145 #define RADIO_HW_VERSION 1 146 147 148 149 /************************************************************************** 150 * LED State Definitions 151 **************************************************************************/ 152 #define LED_COMMAND 0x35 153 154 #define NO_CHANGE_LED 0x00 155 #define ALL_COLOR_LED 0x01 /* streaming state */ 156 #define BLINK_GREEN_LED 0x02 /* connect state */ 157 #define BLINK_RED_LED 0x04 158 #define BLINK_ORANGE_LED 0x10 /* disconnect state */ 159 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ 160 #define SOLID_RED_LED 0x40 /* bootload state */ 161 #define SOLID_ORANGE_LED 0x80 162 163 164 165 /************************************************************************** 166 * Stream State Definitions 167 **************************************************************************/ 168 #define STREAM_COMMAND 0x36 169 #define STREAM_VIDPID 0x00 170 #define STREAM_AUDIO 0xff 171 172 173 174 /************************************************************************** 175 * Bootloader / Flash Commands 176 **************************************************************************/ 177 178 /* unique id sent to bootloader and required to put into a bootload state */ 179 #define UNIQUE_BL_ID 0x34 180 181 /* mask for the flash data */ 182 #define FLASH_DATA_MASK 0x55 183 184 /* bootloader commands */ 185 #define GET_SW_VERSION_COMMAND 0x00 186 #define SET_PAGE_COMMAND 0x01 187 #define ERASE_PAGE_COMMAND 0x02 188 #define WRITE_PAGE_COMMAND 0x03 189 #define CRC_ON_PAGE_COMMAND 0x04 190 #define READ_FLASH_BYTE_COMMAND 0x05 191 #define RESET_DEVICE_COMMAND 0x06 192 #define GET_HW_VERSION_COMMAND 0x07 193 #define BLANK 0xff 194 195 /* bootloader command responses */ 196 #define COMMAND_OK 0x01 197 #define COMMAND_FAILED 0x02 198 #define COMMAND_PENDING 0x03 199 200 201 202 /************************************************************************** 203 * General Driver Functions - REGISTER_REPORTs 204 **************************************************************************/ 205 206 /* 207 * si470x_get_report - receive a HID report 208 */ 209 static int si470x_get_report(struct si470x_device *radio, void *buf, int size) 210 { 211 unsigned char *report = (unsigned char *) buf; 212 int retval; 213 214 retval = usb_control_msg(radio->usbdev, 215 usb_rcvctrlpipe(radio->usbdev, 0), 216 HID_REQ_GET_REPORT, 217 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 218 report[0], 2, 219 buf, size, usb_timeout); 220 221 if (retval < 0) 222 dev_warn(&radio->intf->dev, 223 "si470x_get_report: usb_control_msg returned %d\n", 224 retval); 225 return retval; 226 } 227 228 229 /* 230 * si470x_set_report - send a HID report 231 */ 232 static int si470x_set_report(struct si470x_device *radio, void *buf, int size) 233 { 234 unsigned char *report = (unsigned char *) buf; 235 int retval; 236 237 retval = usb_control_msg(radio->usbdev, 238 usb_sndctrlpipe(radio->usbdev, 0), 239 HID_REQ_SET_REPORT, 240 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, 241 report[0], 2, 242 buf, size, usb_timeout); 243 244 if (retval < 0) 245 dev_warn(&radio->intf->dev, 246 "si470x_set_report: usb_control_msg returned %d\n", 247 retval); 248 return retval; 249 } 250 251 252 /* 253 * si470x_get_register - read register 254 */ 255 int si470x_get_register(struct si470x_device *radio, int regnr) 256 { 257 unsigned char buf[REGISTER_REPORT_SIZE]; 258 int retval; 259 260 buf[0] = REGISTER_REPORT(regnr); 261 262 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 263 264 if (retval >= 0) 265 radio->registers[regnr] = get_unaligned_be16(&buf[1]); 266 267 return (retval < 0) ? -EINVAL : 0; 268 } 269 270 271 /* 272 * si470x_set_register - write register 273 */ 274 int si470x_set_register(struct si470x_device *radio, int regnr) 275 { 276 unsigned char buf[REGISTER_REPORT_SIZE]; 277 int retval; 278 279 buf[0] = REGISTER_REPORT(regnr); 280 put_unaligned_be16(radio->registers[regnr], &buf[1]); 281 282 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); 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 unsigned char buf[ENTIRE_REPORT_SIZE]; 299 int retval; 300 unsigned char regnr; 301 302 buf[0] = ENTIRE_REPORT; 303 304 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 305 306 if (retval >= 0) 307 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) 308 radio->registers[regnr] = get_unaligned_be16( 309 &buf[regnr * RADIO_REGISTER_SIZE + 1]); 310 311 return (retval < 0) ? -EINVAL : 0; 312 } 313 314 315 316 /************************************************************************** 317 * General Driver Functions - LED_REPORT 318 **************************************************************************/ 319 320 /* 321 * si470x_set_led_state - sets the led state 322 */ 323 static int si470x_set_led_state(struct si470x_device *radio, 324 unsigned char led_state) 325 { 326 unsigned char buf[LED_REPORT_SIZE]; 327 int retval; 328 329 buf[0] = LED_REPORT; 330 buf[1] = LED_COMMAND; 331 buf[2] = led_state; 332 333 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); 334 335 return (retval < 0) ? -EINVAL : 0; 336 } 337 338 339 340 /************************************************************************** 341 * General Driver Functions - SCRATCH_REPORT 342 **************************************************************************/ 343 344 /* 345 * si470x_get_scratch_versions - gets the scratch page and version infos 346 */ 347 static int si470x_get_scratch_page_versions(struct si470x_device *radio) 348 { 349 unsigned char buf[SCRATCH_REPORT_SIZE]; 350 int retval; 351 352 buf[0] = SCRATCH_REPORT; 353 354 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 355 356 if (retval < 0) 357 dev_warn(&radio->intf->dev, "si470x_get_scratch: " 358 "si470x_get_report returned %d\n", retval); 359 else { 360 radio->software_version = buf[1]; 361 radio->hardware_version = buf[2]; 362 } 363 364 return (retval < 0) ? -EINVAL : 0; 365 } 366 367 368 369 /************************************************************************** 370 * General Driver Functions - DISCONNECT_CHECK 371 **************************************************************************/ 372 373 /* 374 * si470x_disconnect_check - check whether radio disconnects 375 */ 376 int si470x_disconnect_check(struct si470x_device *radio) 377 { 378 if (radio->disconnected) 379 return -EIO; 380 else 381 return 0; 382 } 383 384 385 386 /************************************************************************** 387 * RDS Driver Functions 388 **************************************************************************/ 389 390 /* 391 * si470x_int_in_callback - rds callback and processing function 392 * 393 * TODO: do we need to use mutex locks in some sections? 394 */ 395 static void si470x_int_in_callback(struct urb *urb) 396 { 397 struct si470x_device *radio = urb->context; 398 int retval; 399 unsigned char regnr; 400 unsigned char blocknum; 401 unsigned short bler; /* rds block errors */ 402 unsigned short rds; 403 unsigned char tmpbuf[3]; 404 405 if (urb->status) { 406 if (urb->status == -ENOENT || 407 urb->status == -ECONNRESET || 408 urb->status == -ESHUTDOWN) { 409 return; 410 } else { 411 dev_warn(&radio->intf->dev, 412 "non-zero urb status (%d)\n", urb->status); 413 goto resubmit; /* Maybe we can recover. */ 414 } 415 } 416 417 /* safety checks */ 418 if (radio->disconnected) 419 return; 420 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) 421 goto resubmit; 422 423 if (urb->actual_length > 0) { 424 /* Update RDS registers with URB data */ 425 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++) 426 radio->registers[STATUSRSSI + regnr] = 427 get_unaligned_be16(&radio->int_in_buffer[ 428 regnr * RADIO_REGISTER_SIZE + 1]); 429 /* get rds blocks */ 430 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) { 431 /* No RDS group ready, better luck next time */ 432 goto resubmit; 433 } 434 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) { 435 /* RDS decoder not synchronized */ 436 goto resubmit; 437 } 438 for (blocknum = 0; blocknum < 4; blocknum++) { 439 switch (blocknum) { 440 default: 441 bler = (radio->registers[STATUSRSSI] & 442 STATUSRSSI_BLERA) >> 9; 443 rds = radio->registers[RDSA]; 444 break; 445 case 1: 446 bler = (radio->registers[READCHAN] & 447 READCHAN_BLERB) >> 14; 448 rds = radio->registers[RDSB]; 449 break; 450 case 2: 451 bler = (radio->registers[READCHAN] & 452 READCHAN_BLERC) >> 12; 453 rds = radio->registers[RDSC]; 454 break; 455 case 3: 456 bler = (radio->registers[READCHAN] & 457 READCHAN_BLERD) >> 10; 458 rds = radio->registers[RDSD]; 459 break; 460 }; 461 462 /* Fill the V4L2 RDS buffer */ 463 put_unaligned_le16(rds, &tmpbuf); 464 tmpbuf[2] = blocknum; /* offset name */ 465 tmpbuf[2] |= blocknum << 3; /* received offset */ 466 if (bler > max_rds_errors) 467 tmpbuf[2] |= 0x80; /* uncorrectable errors */ 468 else if (bler > 0) 469 tmpbuf[2] |= 0x40; /* corrected error(s) */ 470 471 /* copy RDS block to internal buffer */ 472 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3); 473 radio->wr_index += 3; 474 475 /* wrap write pointer */ 476 if (radio->wr_index >= radio->buf_size) 477 radio->wr_index = 0; 478 479 /* check for overflow */ 480 if (radio->wr_index == radio->rd_index) { 481 /* increment and wrap read pointer */ 482 radio->rd_index += 3; 483 if (radio->rd_index >= radio->buf_size) 484 radio->rd_index = 0; 485 } 486 } 487 if (radio->wr_index != radio->rd_index) 488 wake_up_interruptible(&radio->read_queue); 489 } 490 491 resubmit: 492 /* Resubmit if we're still running. */ 493 if (radio->int_in_running && radio->usbdev) { 494 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC); 495 if (retval) { 496 dev_warn(&radio->intf->dev, 497 "resubmitting urb failed (%d)", retval); 498 radio->int_in_running = 0; 499 } 500 } 501 } 502 503 504 505 /************************************************************************** 506 * File Operations Interface 507 **************************************************************************/ 508 509 /* 510 * si470x_fops_open - file open 511 */ 512 int si470x_fops_open(struct file *file) 513 { 514 struct si470x_device *radio = video_drvdata(file); 515 int retval; 516 517 mutex_lock(&radio->lock); 518 radio->users++; 519 520 retval = usb_autopm_get_interface(radio->intf); 521 if (retval < 0) { 522 radio->users--; 523 retval = -EIO; 524 goto done; 525 } 526 527 if (radio->users == 1) { 528 /* start radio */ 529 retval = si470x_start(radio); 530 if (retval < 0) { 531 usb_autopm_put_interface(radio->intf); 532 goto done; 533 } 534 535 /* initialize interrupt urb */ 536 usb_fill_int_urb(radio->int_in_urb, radio->usbdev, 537 usb_rcvintpipe(radio->usbdev, 538 radio->int_in_endpoint->bEndpointAddress), 539 radio->int_in_buffer, 540 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize), 541 si470x_int_in_callback, 542 radio, 543 radio->int_in_endpoint->bInterval); 544 545 radio->int_in_running = 1; 546 mb(); 547 548 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL); 549 if (retval) { 550 dev_info(&radio->intf->dev, 551 "submitting int urb failed (%d)\n", retval); 552 radio->int_in_running = 0; 553 usb_autopm_put_interface(radio->intf); 554 } 555 } 556 557 done: 558 mutex_unlock(&radio->lock); 559 return retval; 560 } 561 562 563 /* 564 * si470x_fops_release - file release 565 */ 566 int si470x_fops_release(struct file *file) 567 { 568 struct si470x_device *radio = video_drvdata(file); 569 int retval = 0; 570 571 /* safety check */ 572 if (!radio) { 573 retval = -ENODEV; 574 goto done; 575 } 576 577 mutex_lock(&radio->lock); 578 radio->users--; 579 if (radio->users == 0) { 580 /* shutdown interrupt handler */ 581 if (radio->int_in_running) { 582 radio->int_in_running = 0; 583 if (radio->int_in_urb) 584 usb_kill_urb(radio->int_in_urb); 585 } 586 587 if (radio->disconnected) { 588 video_unregister_device(radio->videodev); 589 kfree(radio->int_in_buffer); 590 kfree(radio->buffer); 591 mutex_unlock(&radio->lock); 592 kfree(radio); 593 goto done; 594 } 595 596 /* cancel read processes */ 597 wake_up_interruptible(&radio->read_queue); 598 599 /* stop radio */ 600 retval = si470x_stop(radio); 601 usb_autopm_put_interface(radio->intf); 602 } 603 mutex_unlock(&radio->lock); 604 done: 605 return retval; 606 } 607 608 609 610 /************************************************************************** 611 * Video4Linux Interface 612 **************************************************************************/ 613 614 /* 615 * si470x_vidioc_querycap - query device capabilities 616 */ 617 int si470x_vidioc_querycap(struct file *file, void *priv, 618 struct v4l2_capability *capability) 619 { 620 struct si470x_device *radio = video_drvdata(file); 621 622 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver)); 623 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); 624 usb_make_path(radio->usbdev, capability->bus_info, 625 sizeof(capability->bus_info)); 626 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | 627 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; 628 629 return 0; 630 } 631 632 633 634 /************************************************************************** 635 * USB Interface 636 **************************************************************************/ 637 638 /* 639 * si470x_usb_driver_probe - probe for the device 640 */ 641 static int si470x_usb_driver_probe(struct usb_interface *intf, 642 const struct usb_device_id *id) 643 { 644 struct si470x_device *radio; 645 struct usb_host_interface *iface_desc; 646 struct usb_endpoint_descriptor *endpoint; 647 int i, int_end_size, retval = 0; 648 unsigned char version_warning = 0; 649 650 /* private data allocation and initialization */ 651 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); 652 if (!radio) { 653 retval = -ENOMEM; 654 goto err_initial; 655 } 656 radio->users = 0; 657 radio->disconnected = 0; 658 radio->usbdev = interface_to_usbdev(intf); 659 radio->intf = intf; 660 mutex_init(&radio->lock); 661 662 iface_desc = intf->cur_altsetting; 663 664 /* Set up interrupt endpoint information. */ 665 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 666 endpoint = &iface_desc->endpoint[i].desc; 667 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == 668 USB_DIR_IN) && ((endpoint->bmAttributes & 669 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) 670 radio->int_in_endpoint = endpoint; 671 } 672 if (!radio->int_in_endpoint) { 673 dev_info(&intf->dev, "could not find interrupt in endpoint\n"); 674 retval = -EIO; 675 goto err_radio; 676 } 677 678 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize); 679 680 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL); 681 if (!radio->int_in_buffer) { 682 dev_info(&intf->dev, "could not allocate int_in_buffer"); 683 retval = -ENOMEM; 684 goto err_radio; 685 } 686 687 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); 688 if (!radio->int_in_urb) { 689 dev_info(&intf->dev, "could not allocate int_in_urb"); 690 retval = -ENOMEM; 691 goto err_intbuffer; 692 } 693 694 /* video device allocation and initialization */ 695 radio->videodev = video_device_alloc(); 696 if (!radio->videodev) { 697 retval = -ENOMEM; 698 goto err_urb; 699 } 700 memcpy(radio->videodev, &si470x_viddev_template, 701 sizeof(si470x_viddev_template)); 702 video_set_drvdata(radio->videodev, radio); 703 704 /* get device and chip versions */ 705 if (si470x_get_all_registers(radio) < 0) { 706 retval = -EIO; 707 goto err_video; 708 } 709 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", 710 radio->registers[DEVICEID], radio->registers[CHIPID]); 711 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) { 712 dev_warn(&intf->dev, 713 "This driver is known to work with " 714 "firmware version %hu,\n", RADIO_FW_VERSION); 715 dev_warn(&intf->dev, 716 "but the device has firmware version %hu.\n", 717 radio->registers[CHIPID] & CHIPID_FIRMWARE); 718 version_warning = 1; 719 } 720 721 /* get software and hardware versions */ 722 if (si470x_get_scratch_page_versions(radio) < 0) { 723 retval = -EIO; 724 goto err_video; 725 } 726 dev_info(&intf->dev, "software version %d, hardware version %d\n", 727 radio->software_version, radio->hardware_version); 728 if (radio->software_version < RADIO_SW_VERSION) { 729 dev_warn(&intf->dev, 730 "This driver is known to work with " 731 "software version %hu,\n", RADIO_SW_VERSION); 732 dev_warn(&intf->dev, 733 "but the device has software version %hu.\n", 734 radio->software_version); 735 version_warning = 1; 736 } 737 if (radio->hardware_version < RADIO_HW_VERSION) { 738 dev_warn(&intf->dev, 739 "This driver is known to work with " 740 "hardware version %hu,\n", RADIO_HW_VERSION); 741 dev_warn(&intf->dev, 742 "but the device has hardware version %hu.\n", 743 radio->hardware_version); 744 version_warning = 1; 745 } 746 747 /* give out version warning */ 748 if (version_warning == 1) { 749 dev_warn(&intf->dev, 750 "If you have some trouble using this driver,\n"); 751 dev_warn(&intf->dev, 752 "please report to V4L ML at " 753 "linux-media@vger.kernel.org\n"); 754 } 755 756 /* set initial frequency */ 757 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ 758 759 /* set led to connect state */ 760 si470x_set_led_state(radio, BLINK_GREEN_LED); 761 762 /* rds buffer allocation */ 763 radio->buf_size = rds_buf * 3; 764 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL); 765 if (!radio->buffer) { 766 retval = -EIO; 767 goto err_video; 768 } 769 770 /* rds buffer configuration */ 771 radio->wr_index = 0; 772 radio->rd_index = 0; 773 init_waitqueue_head(&radio->read_queue); 774 775 /* register video device */ 776 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, 777 radio_nr); 778 if (retval) { 779 dev_warn(&intf->dev, "Could not register video device\n"); 780 goto err_all; 781 } 782 usb_set_intfdata(intf, radio); 783 784 return 0; 785 err_all: 786 kfree(radio->buffer); 787 err_video: 788 video_device_release(radio->videodev); 789 err_urb: 790 usb_free_urb(radio->int_in_urb); 791 err_intbuffer: 792 kfree(radio->int_in_buffer); 793 err_radio: 794 kfree(radio); 795 err_initial: 796 return retval; 797 } 798 799 800 /* 801 * si470x_usb_driver_suspend - suspend the device 802 */ 803 static int si470x_usb_driver_suspend(struct usb_interface *intf, 804 pm_message_t message) 805 { 806 dev_info(&intf->dev, "suspending now...\n"); 807 808 return 0; 809 } 810 811 812 /* 813 * si470x_usb_driver_resume - resume the device 814 */ 815 static int si470x_usb_driver_resume(struct usb_interface *intf) 816 { 817 dev_info(&intf->dev, "resuming now...\n"); 818 819 return 0; 820 } 821 822 823 /* 824 * si470x_usb_driver_disconnect - disconnect the device 825 */ 826 static void si470x_usb_driver_disconnect(struct usb_interface *intf) 827 { 828 struct si470x_device *radio = usb_get_intfdata(intf); 829 830 mutex_lock(&radio->lock); 831 radio->disconnected = 1; 832 usb_set_intfdata(intf, NULL); 833 if (radio->users == 0) { 834 /* set led to disconnect state */ 835 si470x_set_led_state(radio, BLINK_ORANGE_LED); 836 837 /* Free data structures. */ 838 usb_free_urb(radio->int_in_urb); 839 840 kfree(radio->int_in_buffer); 841 video_unregister_device(radio->videodev); 842 kfree(radio->buffer); 843 mutex_unlock(&radio->lock); 844 kfree(radio); 845 } else { 846 mutex_unlock(&radio->lock); 847 } 848 } 849 850 851 /* 852 * si470x_usb_driver - usb driver interface 853 */ 854 static struct usb_driver si470x_usb_driver = { 855 .name = DRIVER_NAME, 856 .probe = si470x_usb_driver_probe, 857 .disconnect = si470x_usb_driver_disconnect, 858 .suspend = si470x_usb_driver_suspend, 859 .resume = si470x_usb_driver_resume, 860 .id_table = si470x_usb_driver_id_table, 861 .supports_autosuspend = 1, 862 }; 863 864 module_usb_driver(si470x_usb_driver); 865 866 MODULE_LICENSE("GPL"); 867 MODULE_AUTHOR(DRIVER_AUTHOR); 868 MODULE_DESCRIPTION(DRIVER_DESC); 869 MODULE_VERSION(DRIVER_VERSION); 870