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_KERNEL_VERSION KERNEL_VERSION(1, 0, 10) 33 #define DRIVER_CARD "Silicon Labs Si470x FM Radio Receiver" 34 #define DRIVER_DESC "USB radio driver for Si470x FM Radio Receivers" 35 #define DRIVER_VERSION "1.0.10" 36 37 /* kernel includes */ 38 #include <linux/usb.h> 39 #include <linux/hid.h> 40 #include <linux/slab.h> 41 42 #include "radio-si470x.h" 43 44 45 /* USB Device ID List */ 46 static struct usb_device_id si470x_usb_driver_id_table[] = { 47 /* Silicon Labs USB FM Radio Reference Design */ 48 { USB_DEVICE_AND_INTERFACE_INFO(0x10c4, 0x818a, USB_CLASS_HID, 0, 0) }, 49 /* ADS/Tech FM Radio Receiver (formerly Instant FM Music) */ 50 { USB_DEVICE_AND_INTERFACE_INFO(0x06e1, 0xa155, USB_CLASS_HID, 0, 0) }, 51 /* KWorld USB FM Radio SnapMusic Mobile 700 (FM700) */ 52 { USB_DEVICE_AND_INTERFACE_INFO(0x1b80, 0xd700, USB_CLASS_HID, 0, 0) }, 53 /* Sanei Electric, Inc. FM USB Radio (sold as DealExtreme.com PCear) */ 54 { USB_DEVICE_AND_INTERFACE_INFO(0x10c5, 0x819a, USB_CLASS_HID, 0, 0) }, 55 /* Terminating entry */ 56 { } 57 }; 58 MODULE_DEVICE_TABLE(usb, si470x_usb_driver_id_table); 59 60 61 62 /************************************************************************** 63 * Module Parameters 64 **************************************************************************/ 65 66 /* Radio Nr */ 67 static int radio_nr = -1; 68 module_param(radio_nr, int, 0444); 69 MODULE_PARM_DESC(radio_nr, "Radio Nr"); 70 71 /* USB timeout */ 72 static unsigned int usb_timeout = 500; 73 module_param(usb_timeout, uint, 0644); 74 MODULE_PARM_DESC(usb_timeout, "USB timeout (ms): *500*"); 75 76 /* RDS buffer blocks */ 77 static unsigned int rds_buf = 100; 78 module_param(rds_buf, uint, 0444); 79 MODULE_PARM_DESC(rds_buf, "RDS buffer entries: *100*"); 80 81 /* RDS maximum block errors */ 82 static unsigned short max_rds_errors = 1; 83 /* 0 means 0 errors requiring correction */ 84 /* 1 means 1-2 errors requiring correction (used by original USBRadio.exe) */ 85 /* 2 means 3-5 errors requiring correction */ 86 /* 3 means 6+ errors or errors in checkword, correction not possible */ 87 module_param(max_rds_errors, ushort, 0644); 88 MODULE_PARM_DESC(max_rds_errors, "RDS maximum block errors: *1*"); 89 90 91 92 /************************************************************************** 93 * USB HID Reports 94 **************************************************************************/ 95 96 /* Reports 1-16 give direct read/write access to the 16 Si470x registers */ 97 /* with the (REPORT_ID - 1) corresponding to the register address across USB */ 98 /* endpoint 0 using GET_REPORT and SET_REPORT */ 99 #define REGISTER_REPORT_SIZE (RADIO_REGISTER_SIZE + 1) 100 #define REGISTER_REPORT(reg) ((reg) + 1) 101 102 /* Report 17 gives direct read/write access to the entire Si470x register */ 103 /* map across endpoint 0 using GET_REPORT and SET_REPORT */ 104 #define ENTIRE_REPORT_SIZE (RADIO_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 105 #define ENTIRE_REPORT 17 106 107 /* Report 18 is used to send the lowest 6 Si470x registers up the HID */ 108 /* interrupt endpoint 1 to Windows every 20 milliseconds for status */ 109 #define RDS_REPORT_SIZE (RDS_REGISTER_NUM * RADIO_REGISTER_SIZE + 1) 110 #define RDS_REPORT 18 111 112 /* Report 19: LED state */ 113 #define LED_REPORT_SIZE 3 114 #define LED_REPORT 19 115 116 /* Report 19: stream */ 117 #define STREAM_REPORT_SIZE 3 118 #define STREAM_REPORT 19 119 120 /* Report 20: scratch */ 121 #define SCRATCH_PAGE_SIZE 63 122 #define SCRATCH_REPORT_SIZE (SCRATCH_PAGE_SIZE + 1) 123 #define SCRATCH_REPORT 20 124 125 /* Reports 19-22: flash upgrade of the C8051F321 */ 126 #define WRITE_REPORT_SIZE 4 127 #define WRITE_REPORT 19 128 #define FLASH_REPORT_SIZE 64 129 #define FLASH_REPORT 20 130 #define CRC_REPORT_SIZE 3 131 #define CRC_REPORT 21 132 #define RESPONSE_REPORT_SIZE 2 133 #define RESPONSE_REPORT 22 134 135 /* Report 23: currently unused, but can accept 60 byte reports on the HID */ 136 /* interrupt out endpoint 2 every 1 millisecond */ 137 #define UNUSED_REPORT 23 138 139 140 141 /************************************************************************** 142 * Software/Hardware Versions from Scratch Page 143 **************************************************************************/ 144 #define RADIO_SW_VERSION_NOT_BOOTLOADABLE 6 145 #define RADIO_SW_VERSION 7 146 #define RADIO_HW_VERSION 1 147 148 149 150 /************************************************************************** 151 * LED State Definitions 152 **************************************************************************/ 153 #define LED_COMMAND 0x35 154 155 #define NO_CHANGE_LED 0x00 156 #define ALL_COLOR_LED 0x01 /* streaming state */ 157 #define BLINK_GREEN_LED 0x02 /* connect state */ 158 #define BLINK_RED_LED 0x04 159 #define BLINK_ORANGE_LED 0x10 /* disconnect state */ 160 #define SOLID_GREEN_LED 0x20 /* tuning/seeking state */ 161 #define SOLID_RED_LED 0x40 /* bootload state */ 162 #define SOLID_ORANGE_LED 0x80 163 164 165 166 /************************************************************************** 167 * Stream State Definitions 168 **************************************************************************/ 169 #define STREAM_COMMAND 0x36 170 #define STREAM_VIDPID 0x00 171 #define STREAM_AUDIO 0xff 172 173 174 175 /************************************************************************** 176 * Bootloader / Flash Commands 177 **************************************************************************/ 178 179 /* unique id sent to bootloader and required to put into a bootload state */ 180 #define UNIQUE_BL_ID 0x34 181 182 /* mask for the flash data */ 183 #define FLASH_DATA_MASK 0x55 184 185 /* bootloader commands */ 186 #define GET_SW_VERSION_COMMAND 0x00 187 #define SET_PAGE_COMMAND 0x01 188 #define ERASE_PAGE_COMMAND 0x02 189 #define WRITE_PAGE_COMMAND 0x03 190 #define CRC_ON_PAGE_COMMAND 0x04 191 #define READ_FLASH_BYTE_COMMAND 0x05 192 #define RESET_DEVICE_COMMAND 0x06 193 #define GET_HW_VERSION_COMMAND 0x07 194 #define BLANK 0xff 195 196 /* bootloader command responses */ 197 #define COMMAND_OK 0x01 198 #define COMMAND_FAILED 0x02 199 #define COMMAND_PENDING 0x03 200 201 202 203 /************************************************************************** 204 * General Driver Functions - REGISTER_REPORTs 205 **************************************************************************/ 206 207 /* 208 * si470x_get_report - receive a HID report 209 */ 210 static int si470x_get_report(struct si470x_device *radio, void *buf, int size) 211 { 212 unsigned char *report = (unsigned char *) buf; 213 int retval; 214 215 retval = usb_control_msg(radio->usbdev, 216 usb_rcvctrlpipe(radio->usbdev, 0), 217 HID_REQ_GET_REPORT, 218 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN, 219 report[0], 2, 220 buf, size, usb_timeout); 221 222 if (retval < 0) 223 dev_warn(&radio->intf->dev, 224 "si470x_get_report: usb_control_msg returned %d\n", 225 retval); 226 return retval; 227 } 228 229 230 /* 231 * si470x_set_report - send a HID report 232 */ 233 static int si470x_set_report(struct si470x_device *radio, void *buf, int size) 234 { 235 unsigned char *report = (unsigned char *) buf; 236 int retval; 237 238 retval = usb_control_msg(radio->usbdev, 239 usb_sndctrlpipe(radio->usbdev, 0), 240 HID_REQ_SET_REPORT, 241 USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_OUT, 242 report[0], 2, 243 buf, size, usb_timeout); 244 245 if (retval < 0) 246 dev_warn(&radio->intf->dev, 247 "si470x_set_report: usb_control_msg returned %d\n", 248 retval); 249 return retval; 250 } 251 252 253 /* 254 * si470x_get_register - read register 255 */ 256 int si470x_get_register(struct si470x_device *radio, int regnr) 257 { 258 unsigned char buf[REGISTER_REPORT_SIZE]; 259 int retval; 260 261 buf[0] = REGISTER_REPORT(regnr); 262 263 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 264 265 if (retval >= 0) 266 radio->registers[regnr] = get_unaligned_be16(&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 unsigned char buf[REGISTER_REPORT_SIZE]; 278 int retval; 279 280 buf[0] = REGISTER_REPORT(regnr); 281 put_unaligned_be16(radio->registers[regnr], &buf[1]); 282 283 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); 284 285 return (retval < 0) ? -EINVAL : 0; 286 } 287 288 289 290 /************************************************************************** 291 * General Driver Functions - ENTIRE_REPORT 292 **************************************************************************/ 293 294 /* 295 * si470x_get_all_registers - read entire registers 296 */ 297 static int si470x_get_all_registers(struct si470x_device *radio) 298 { 299 unsigned char buf[ENTIRE_REPORT_SIZE]; 300 int retval; 301 unsigned char regnr; 302 303 buf[0] = ENTIRE_REPORT; 304 305 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 306 307 if (retval >= 0) 308 for (regnr = 0; regnr < RADIO_REGISTER_NUM; regnr++) 309 radio->registers[regnr] = get_unaligned_be16( 310 &buf[regnr * RADIO_REGISTER_SIZE + 1]); 311 312 return (retval < 0) ? -EINVAL : 0; 313 } 314 315 316 317 /************************************************************************** 318 * General Driver Functions - LED_REPORT 319 **************************************************************************/ 320 321 /* 322 * si470x_set_led_state - sets the led state 323 */ 324 static int si470x_set_led_state(struct si470x_device *radio, 325 unsigned char led_state) 326 { 327 unsigned char buf[LED_REPORT_SIZE]; 328 int retval; 329 330 buf[0] = LED_REPORT; 331 buf[1] = LED_COMMAND; 332 buf[2] = led_state; 333 334 retval = si470x_set_report(radio, (void *) &buf, sizeof(buf)); 335 336 return (retval < 0) ? -EINVAL : 0; 337 } 338 339 340 341 /************************************************************************** 342 * General Driver Functions - SCRATCH_REPORT 343 **************************************************************************/ 344 345 /* 346 * si470x_get_scratch_versions - gets the scratch page and version infos 347 */ 348 static int si470x_get_scratch_page_versions(struct si470x_device *radio) 349 { 350 unsigned char buf[SCRATCH_REPORT_SIZE]; 351 int retval; 352 353 buf[0] = SCRATCH_REPORT; 354 355 retval = si470x_get_report(radio, (void *) &buf, sizeof(buf)); 356 357 if (retval < 0) 358 dev_warn(&radio->intf->dev, "si470x_get_scratch: " 359 "si470x_get_report returned %d\n", retval); 360 else { 361 radio->software_version = buf[1]; 362 radio->hardware_version = buf[2]; 363 } 364 365 return (retval < 0) ? -EINVAL : 0; 366 } 367 368 369 370 /************************************************************************** 371 * General Driver Functions - DISCONNECT_CHECK 372 **************************************************************************/ 373 374 /* 375 * si470x_disconnect_check - check whether radio disconnects 376 */ 377 int si470x_disconnect_check(struct si470x_device *radio) 378 { 379 if (radio->disconnected) 380 return -EIO; 381 else 382 return 0; 383 } 384 385 386 387 /************************************************************************** 388 * RDS Driver Functions 389 **************************************************************************/ 390 391 /* 392 * si470x_int_in_callback - rds callback and processing function 393 * 394 * TODO: do we need to use mutex locks in some sections? 395 */ 396 static void si470x_int_in_callback(struct urb *urb) 397 { 398 struct si470x_device *radio = urb->context; 399 unsigned char buf[RDS_REPORT_SIZE]; 400 int retval; 401 unsigned char regnr; 402 unsigned char blocknum; 403 unsigned short bler; /* rds block errors */ 404 unsigned short rds; 405 unsigned char tmpbuf[3]; 406 407 if (urb->status) { 408 if (urb->status == -ENOENT || 409 urb->status == -ECONNRESET || 410 urb->status == -ESHUTDOWN) { 411 return; 412 } else { 413 dev_warn(&radio->intf->dev, 414 "non-zero urb status (%d)\n", urb->status); 415 goto resubmit; /* Maybe we can recover. */ 416 } 417 } 418 419 /* safety checks */ 420 if (radio->disconnected) 421 return; 422 if ((radio->registers[SYSCONFIG1] & SYSCONFIG1_RDS) == 0) 423 goto resubmit; 424 425 if (urb->actual_length > 0) { 426 /* Update RDS registers with URB data */ 427 buf[0] = RDS_REPORT; 428 for (regnr = 0; regnr < RDS_REGISTER_NUM; regnr++) 429 radio->registers[STATUSRSSI + regnr] = 430 get_unaligned_be16(&radio->int_in_buffer[ 431 regnr * RADIO_REGISTER_SIZE + 1]); 432 /* get rds blocks */ 433 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSR) == 0) { 434 /* No RDS group ready, better luck next time */ 435 goto resubmit; 436 } 437 if ((radio->registers[STATUSRSSI] & STATUSRSSI_RDSS) == 0) { 438 /* RDS decoder not synchronized */ 439 goto resubmit; 440 } 441 for (blocknum = 0; blocknum < 4; blocknum++) { 442 switch (blocknum) { 443 default: 444 bler = (radio->registers[STATUSRSSI] & 445 STATUSRSSI_BLERA) >> 9; 446 rds = radio->registers[RDSA]; 447 break; 448 case 1: 449 bler = (radio->registers[READCHAN] & 450 READCHAN_BLERB) >> 14; 451 rds = radio->registers[RDSB]; 452 break; 453 case 2: 454 bler = (radio->registers[READCHAN] & 455 READCHAN_BLERC) >> 12; 456 rds = radio->registers[RDSC]; 457 break; 458 case 3: 459 bler = (radio->registers[READCHAN] & 460 READCHAN_BLERD) >> 10; 461 rds = radio->registers[RDSD]; 462 break; 463 }; 464 465 /* Fill the V4L2 RDS buffer */ 466 put_unaligned_le16(rds, &tmpbuf); 467 tmpbuf[2] = blocknum; /* offset name */ 468 tmpbuf[2] |= blocknum << 3; /* received offset */ 469 if (bler > max_rds_errors) 470 tmpbuf[2] |= 0x80; /* uncorrectable errors */ 471 else if (bler > 0) 472 tmpbuf[2] |= 0x40; /* corrected error(s) */ 473 474 /* copy RDS block to internal buffer */ 475 memcpy(&radio->buffer[radio->wr_index], &tmpbuf, 3); 476 radio->wr_index += 3; 477 478 /* wrap write pointer */ 479 if (radio->wr_index >= radio->buf_size) 480 radio->wr_index = 0; 481 482 /* check for overflow */ 483 if (radio->wr_index == radio->rd_index) { 484 /* increment and wrap read pointer */ 485 radio->rd_index += 3; 486 if (radio->rd_index >= radio->buf_size) 487 radio->rd_index = 0; 488 } 489 } 490 if (radio->wr_index != radio->rd_index) 491 wake_up_interruptible(&radio->read_queue); 492 } 493 494 resubmit: 495 /* Resubmit if we're still running. */ 496 if (radio->int_in_running && radio->usbdev) { 497 retval = usb_submit_urb(radio->int_in_urb, GFP_ATOMIC); 498 if (retval) { 499 dev_warn(&radio->intf->dev, 500 "resubmitting urb failed (%d)", retval); 501 radio->int_in_running = 0; 502 } 503 } 504 } 505 506 507 508 /************************************************************************** 509 * File Operations Interface 510 **************************************************************************/ 511 512 /* 513 * si470x_fops_open - file open 514 */ 515 int si470x_fops_open(struct file *file) 516 { 517 struct si470x_device *radio = video_drvdata(file); 518 int retval; 519 520 mutex_lock(&radio->lock); 521 radio->users++; 522 523 retval = usb_autopm_get_interface(radio->intf); 524 if (retval < 0) { 525 radio->users--; 526 retval = -EIO; 527 goto done; 528 } 529 530 if (radio->users == 1) { 531 /* start radio */ 532 retval = si470x_start(radio); 533 if (retval < 0) { 534 usb_autopm_put_interface(radio->intf); 535 goto done; 536 } 537 538 /* initialize interrupt urb */ 539 usb_fill_int_urb(radio->int_in_urb, radio->usbdev, 540 usb_rcvintpipe(radio->usbdev, 541 radio->int_in_endpoint->bEndpointAddress), 542 radio->int_in_buffer, 543 le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize), 544 si470x_int_in_callback, 545 radio, 546 radio->int_in_endpoint->bInterval); 547 548 radio->int_in_running = 1; 549 mb(); 550 551 retval = usb_submit_urb(radio->int_in_urb, GFP_KERNEL); 552 if (retval) { 553 dev_info(&radio->intf->dev, 554 "submitting int urb failed (%d)\n", retval); 555 radio->int_in_running = 0; 556 usb_autopm_put_interface(radio->intf); 557 } 558 } 559 560 done: 561 mutex_unlock(&radio->lock); 562 return retval; 563 } 564 565 566 /* 567 * si470x_fops_release - file release 568 */ 569 int si470x_fops_release(struct file *file) 570 { 571 struct si470x_device *radio = video_drvdata(file); 572 int retval = 0; 573 574 /* safety check */ 575 if (!radio) { 576 retval = -ENODEV; 577 goto done; 578 } 579 580 mutex_lock(&radio->lock); 581 radio->users--; 582 if (radio->users == 0) { 583 /* shutdown interrupt handler */ 584 if (radio->int_in_running) { 585 radio->int_in_running = 0; 586 if (radio->int_in_urb) 587 usb_kill_urb(radio->int_in_urb); 588 } 589 590 if (radio->disconnected) { 591 video_unregister_device(radio->videodev); 592 kfree(radio->int_in_buffer); 593 kfree(radio->buffer); 594 mutex_unlock(&radio->lock); 595 kfree(radio); 596 goto done; 597 } 598 599 /* cancel read processes */ 600 wake_up_interruptible(&radio->read_queue); 601 602 /* stop radio */ 603 retval = si470x_stop(radio); 604 usb_autopm_put_interface(radio->intf); 605 } 606 mutex_unlock(&radio->lock); 607 done: 608 return retval; 609 } 610 611 612 613 /************************************************************************** 614 * Video4Linux Interface 615 **************************************************************************/ 616 617 /* 618 * si470x_vidioc_querycap - query device capabilities 619 */ 620 int si470x_vidioc_querycap(struct file *file, void *priv, 621 struct v4l2_capability *capability) 622 { 623 struct si470x_device *radio = video_drvdata(file); 624 625 strlcpy(capability->driver, DRIVER_NAME, sizeof(capability->driver)); 626 strlcpy(capability->card, DRIVER_CARD, sizeof(capability->card)); 627 usb_make_path(radio->usbdev, capability->bus_info, 628 sizeof(capability->bus_info)); 629 capability->version = DRIVER_KERNEL_VERSION; 630 capability->capabilities = V4L2_CAP_HW_FREQ_SEEK | 631 V4L2_CAP_TUNER | V4L2_CAP_RADIO | V4L2_CAP_RDS_CAPTURE; 632 633 return 0; 634 } 635 636 637 638 /************************************************************************** 639 * USB Interface 640 **************************************************************************/ 641 642 /* 643 * si470x_usb_driver_probe - probe for the device 644 */ 645 static int si470x_usb_driver_probe(struct usb_interface *intf, 646 const struct usb_device_id *id) 647 { 648 struct si470x_device *radio; 649 struct usb_host_interface *iface_desc; 650 struct usb_endpoint_descriptor *endpoint; 651 int i, int_end_size, retval = 0; 652 unsigned char version_warning = 0; 653 654 /* private data allocation and initialization */ 655 radio = kzalloc(sizeof(struct si470x_device), GFP_KERNEL); 656 if (!radio) { 657 retval = -ENOMEM; 658 goto err_initial; 659 } 660 radio->users = 0; 661 radio->disconnected = 0; 662 radio->usbdev = interface_to_usbdev(intf); 663 radio->intf = intf; 664 mutex_init(&radio->lock); 665 666 iface_desc = intf->cur_altsetting; 667 668 /* Set up interrupt endpoint information. */ 669 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 670 endpoint = &iface_desc->endpoint[i].desc; 671 if (((endpoint->bEndpointAddress & USB_ENDPOINT_DIR_MASK) == 672 USB_DIR_IN) && ((endpoint->bmAttributes & 673 USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) 674 radio->int_in_endpoint = endpoint; 675 } 676 if (!radio->int_in_endpoint) { 677 dev_info(&intf->dev, "could not find interrupt in endpoint\n"); 678 retval = -EIO; 679 goto err_radio; 680 } 681 682 int_end_size = le16_to_cpu(radio->int_in_endpoint->wMaxPacketSize); 683 684 radio->int_in_buffer = kmalloc(int_end_size, GFP_KERNEL); 685 if (!radio->int_in_buffer) { 686 dev_info(&intf->dev, "could not allocate int_in_buffer"); 687 retval = -ENOMEM; 688 goto err_radio; 689 } 690 691 radio->int_in_urb = usb_alloc_urb(0, GFP_KERNEL); 692 if (!radio->int_in_urb) { 693 dev_info(&intf->dev, "could not allocate int_in_urb"); 694 retval = -ENOMEM; 695 goto err_intbuffer; 696 } 697 698 /* video device allocation and initialization */ 699 radio->videodev = video_device_alloc(); 700 if (!radio->videodev) { 701 retval = -ENOMEM; 702 goto err_intbuffer; 703 } 704 memcpy(radio->videodev, &si470x_viddev_template, 705 sizeof(si470x_viddev_template)); 706 video_set_drvdata(radio->videodev, radio); 707 708 /* get device and chip versions */ 709 if (si470x_get_all_registers(radio) < 0) { 710 retval = -EIO; 711 goto err_video; 712 } 713 dev_info(&intf->dev, "DeviceID=0x%4.4hx ChipID=0x%4.4hx\n", 714 radio->registers[DEVICEID], radio->registers[CHIPID]); 715 if ((radio->registers[CHIPID] & CHIPID_FIRMWARE) < RADIO_FW_VERSION) { 716 dev_warn(&intf->dev, 717 "This driver is known to work with " 718 "firmware version %hu,\n", RADIO_FW_VERSION); 719 dev_warn(&intf->dev, 720 "but the device has firmware version %hu.\n", 721 radio->registers[CHIPID] & CHIPID_FIRMWARE); 722 version_warning = 1; 723 } 724 725 /* get software and hardware versions */ 726 if (si470x_get_scratch_page_versions(radio) < 0) { 727 retval = -EIO; 728 goto err_video; 729 } 730 dev_info(&intf->dev, "software version %d, hardware version %d\n", 731 radio->software_version, radio->hardware_version); 732 if (radio->software_version < RADIO_SW_VERSION) { 733 dev_warn(&intf->dev, 734 "This driver is known to work with " 735 "software version %hu,\n", RADIO_SW_VERSION); 736 dev_warn(&intf->dev, 737 "but the device has software version %hu.\n", 738 radio->software_version); 739 version_warning = 1; 740 } 741 if (radio->hardware_version < RADIO_HW_VERSION) { 742 dev_warn(&intf->dev, 743 "This driver is known to work with " 744 "hardware version %hu,\n", RADIO_HW_VERSION); 745 dev_warn(&intf->dev, 746 "but the device has hardware version %hu.\n", 747 radio->hardware_version); 748 version_warning = 1; 749 } 750 751 /* give out version warning */ 752 if (version_warning == 1) { 753 dev_warn(&intf->dev, 754 "If you have some trouble using this driver,\n"); 755 dev_warn(&intf->dev, 756 "please report to V4L ML at " 757 "linux-media@vger.kernel.org\n"); 758 } 759 760 /* set initial frequency */ 761 si470x_set_freq(radio, 87.5 * FREQ_MUL); /* available in all regions */ 762 763 /* set led to connect state */ 764 si470x_set_led_state(radio, BLINK_GREEN_LED); 765 766 /* rds buffer allocation */ 767 radio->buf_size = rds_buf * 3; 768 radio->buffer = kmalloc(radio->buf_size, GFP_KERNEL); 769 if (!radio->buffer) { 770 retval = -EIO; 771 goto err_video; 772 } 773 774 /* rds buffer configuration */ 775 radio->wr_index = 0; 776 radio->rd_index = 0; 777 init_waitqueue_head(&radio->read_queue); 778 779 /* register video device */ 780 retval = video_register_device(radio->videodev, VFL_TYPE_RADIO, 781 radio_nr); 782 if (retval) { 783 dev_warn(&intf->dev, "Could not register video device\n"); 784 goto err_all; 785 } 786 usb_set_intfdata(intf, radio); 787 788 return 0; 789 err_all: 790 kfree(radio->buffer); 791 err_video: 792 video_device_release(radio->videodev); 793 err_intbuffer: 794 kfree(radio->int_in_buffer); 795 err_radio: 796 kfree(radio); 797 err_initial: 798 return retval; 799 } 800 801 802 /* 803 * si470x_usb_driver_suspend - suspend the device 804 */ 805 static int si470x_usb_driver_suspend(struct usb_interface *intf, 806 pm_message_t message) 807 { 808 dev_info(&intf->dev, "suspending now...\n"); 809 810 return 0; 811 } 812 813 814 /* 815 * si470x_usb_driver_resume - resume the device 816 */ 817 static int si470x_usb_driver_resume(struct usb_interface *intf) 818 { 819 dev_info(&intf->dev, "resuming now...\n"); 820 821 return 0; 822 } 823 824 825 /* 826 * si470x_usb_driver_disconnect - disconnect the device 827 */ 828 static void si470x_usb_driver_disconnect(struct usb_interface *intf) 829 { 830 struct si470x_device *radio = usb_get_intfdata(intf); 831 832 mutex_lock(&radio->lock); 833 radio->disconnected = 1; 834 usb_set_intfdata(intf, NULL); 835 if (radio->users == 0) { 836 /* set led to disconnect state */ 837 si470x_set_led_state(radio, BLINK_ORANGE_LED); 838 839 /* Free data structures. */ 840 usb_free_urb(radio->int_in_urb); 841 842 kfree(radio->int_in_buffer); 843 video_unregister_device(radio->videodev); 844 kfree(radio->buffer); 845 mutex_unlock(&radio->lock); 846 kfree(radio); 847 } else { 848 mutex_unlock(&radio->lock); 849 } 850 } 851 852 853 /* 854 * si470x_usb_driver - usb driver interface 855 */ 856 static struct usb_driver si470x_usb_driver = { 857 .name = DRIVER_NAME, 858 .probe = si470x_usb_driver_probe, 859 .disconnect = si470x_usb_driver_disconnect, 860 .suspend = si470x_usb_driver_suspend, 861 .resume = si470x_usb_driver_resume, 862 .id_table = si470x_usb_driver_id_table, 863 .supports_autosuspend = 1, 864 }; 865 866 867 868 /************************************************************************** 869 * Module Interface 870 **************************************************************************/ 871 872 /* 873 * si470x_module_init - module init 874 */ 875 static int __init si470x_module_init(void) 876 { 877 printk(KERN_INFO DRIVER_DESC ", Version " DRIVER_VERSION "\n"); 878 return usb_register(&si470x_usb_driver); 879 } 880 881 882 /* 883 * si470x_module_exit - module exit 884 */ 885 static void __exit si470x_module_exit(void) 886 { 887 usb_deregister(&si470x_usb_driver); 888 } 889 890 891 module_init(si470x_module_init); 892 module_exit(si470x_module_exit); 893 894 MODULE_LICENSE("GPL"); 895 MODULE_AUTHOR(DRIVER_AUTHOR); 896 MODULE_DESCRIPTION(DRIVER_DESC); 897 MODULE_VERSION(DRIVER_VERSION); 898