1 /* 2 * USB RedRat3 IR Transceiver rc-core driver 3 * 4 * Copyright (c) 2011 by Jarod Wilson <jarod@redhat.com> 5 * based heavily on the work of Stephen Cox, with additional 6 * help from RedRat Ltd. 7 * 8 * This driver began life based an an old version of the first-generation 9 * lirc_mceusb driver from the lirc 0.7.2 distribution. It was then 10 * significantly rewritten by Stephen Cox with the aid of RedRat Ltd's 11 * Chris Dodge. 12 * 13 * The driver was then ported to rc-core and significantly rewritten again, 14 * by Jarod, using the in-kernel mceusb driver as a guide, after an initial 15 * port effort was started by Stephen. 16 * 17 * TODO LIST: 18 * - fix lirc not showing repeats properly 19 * -- 20 * 21 * The RedRat3 is a USB transceiver with both send & receive, 22 * with 2 separate sensors available for receive to enable 23 * both good long range reception for general use, and good 24 * short range reception when required for learning a signal. 25 * 26 * http://www.redrat.co.uk/ 27 * 28 * It uses its own little protocol to communicate, the required 29 * parts of which are embedded within this driver. 30 * -- 31 * 32 * This program is free software; you can redistribute it and/or modify 33 * it under the terms of the GNU General Public License as published by 34 * the Free Software Foundation; either version 2 of the License, or 35 * (at your option) any later version. 36 * 37 * This program is distributed in the hope that it will be useful, 38 * but WITHOUT ANY WARRANTY; without even the implied warranty of 39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 40 * GNU General Public License for more details. 41 * 42 * You should have received a copy of the GNU General Public License 43 * along with this program; if not, write to the Free Software 44 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 45 * 46 */ 47 48 #include <linux/device.h> 49 #include <linux/module.h> 50 #include <linux/slab.h> 51 #include <linux/usb.h> 52 #include <linux/usb/input.h> 53 #include <media/rc-core.h> 54 55 /* Driver Information */ 56 #define DRIVER_VERSION "0.70" 57 #define DRIVER_AUTHOR "Jarod Wilson <jarod@redhat.com>" 58 #define DRIVER_AUTHOR2 "The Dweller, Stephen Cox" 59 #define DRIVER_DESC "RedRat3 USB IR Transceiver Driver" 60 #define DRIVER_NAME "redrat3" 61 62 /* module parameters */ 63 #ifdef CONFIG_USB_DEBUG 64 static int debug = 1; 65 #else 66 static int debug; 67 #endif 68 69 #define RR3_DEBUG_STANDARD 0x1 70 #define RR3_DEBUG_FUNCTION_TRACE 0x2 71 72 #define rr3_dbg(dev, fmt, ...) \ 73 do { \ 74 if (debug & RR3_DEBUG_STANDARD) \ 75 dev_info(dev, fmt, ## __VA_ARGS__); \ 76 } while (0) 77 78 #define rr3_ftr(dev, fmt, ...) \ 79 do { \ 80 if (debug & RR3_DEBUG_FUNCTION_TRACE) \ 81 dev_info(dev, fmt, ## __VA_ARGS__); \ 82 } while (0) 83 84 /* bulk data transfer types */ 85 #define RR3_ERROR 0x01 86 #define RR3_MOD_SIGNAL_IN 0x20 87 #define RR3_MOD_SIGNAL_OUT 0x21 88 89 /* Get the RR firmware version */ 90 #define RR3_FW_VERSION 0xb1 91 #define RR3_FW_VERSION_LEN 64 92 /* Send encoded signal bulk-sent earlier*/ 93 #define RR3_TX_SEND_SIGNAL 0xb3 94 #define RR3_SET_IR_PARAM 0xb7 95 #define RR3_GET_IR_PARAM 0xb8 96 /* Blink the red LED on the device */ 97 #define RR3_BLINK_LED 0xb9 98 /* Read serial number of device */ 99 #define RR3_READ_SER_NO 0xba 100 #define RR3_SER_NO_LEN 4 101 /* Start capture with the RC receiver */ 102 #define RR3_RC_DET_ENABLE 0xbb 103 /* Stop capture with the RC receiver */ 104 #define RR3_RC_DET_DISABLE 0xbc 105 /* Return the status of RC detector capture */ 106 #define RR3_RC_DET_STATUS 0xbd 107 /* Reset redrat */ 108 #define RR3_RESET 0xa0 109 110 /* Max number of lengths in the signal. */ 111 #define RR3_IR_IO_MAX_LENGTHS 0x01 112 /* Periods to measure mod. freq. */ 113 #define RR3_IR_IO_PERIODS_MF 0x02 114 /* Size of memory for main signal data */ 115 #define RR3_IR_IO_SIG_MEM_SIZE 0x03 116 /* Delta value when measuring lengths */ 117 #define RR3_IR_IO_LENGTH_FUZZ 0x04 118 /* Timeout for end of signal detection */ 119 #define RR3_IR_IO_SIG_TIMEOUT 0x05 120 /* Minumum value for pause recognition. */ 121 #define RR3_IR_IO_MIN_PAUSE 0x06 122 123 /* Clock freq. of EZ-USB chip */ 124 #define RR3_CLK 24000000 125 /* Clock periods per timer count */ 126 #define RR3_CLK_PER_COUNT 12 127 /* (RR3_CLK / RR3_CLK_PER_COUNT) */ 128 #define RR3_CLK_CONV_FACTOR 2000000 129 /* USB bulk-in IR data endpoint address */ 130 #define RR3_BULK_IN_EP_ADDR 0x82 131 132 /* Raw Modulated signal data value offsets */ 133 #define RR3_PAUSE_OFFSET 0 134 #define RR3_FREQ_COUNT_OFFSET 4 135 #define RR3_NUM_PERIOD_OFFSET 6 136 #define RR3_MAX_LENGTHS_OFFSET 8 137 #define RR3_NUM_LENGTHS_OFFSET 9 138 #define RR3_MAX_SIGS_OFFSET 10 139 #define RR3_NUM_SIGS_OFFSET 12 140 #define RR3_REPEATS_OFFSET 14 141 142 /* Size of the fixed-length portion of the signal */ 143 #define RR3_HEADER_LENGTH 15 144 #define RR3_DRIVER_MAXLENS 128 145 #define RR3_MAX_SIG_SIZE 512 146 #define RR3_MAX_BUF_SIZE \ 147 ((2 * RR3_HEADER_LENGTH) + RR3_DRIVER_MAXLENS + RR3_MAX_SIG_SIZE) 148 #define RR3_TIME_UNIT 50 149 #define RR3_END_OF_SIGNAL 0x7f 150 #define RR3_TX_HEADER_OFFSET 4 151 #define RR3_TX_TRAILER_LEN 2 152 #define RR3_RX_MIN_TIMEOUT 5 153 #define RR3_RX_MAX_TIMEOUT 2000 154 155 /* The 8051's CPUCS Register address */ 156 #define RR3_CPUCS_REG_ADDR 0x7f92 157 158 #define USB_RR3USB_VENDOR_ID 0x112a 159 #define USB_RR3USB_PRODUCT_ID 0x0001 160 #define USB_RR3IIUSB_PRODUCT_ID 0x0005 161 162 /* table of devices that work with this driver */ 163 static struct usb_device_id redrat3_dev_table[] = { 164 /* Original version of the RedRat3 */ 165 {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3USB_PRODUCT_ID)}, 166 /* Second Version/release of the RedRat3 - RetRat3-II */ 167 {USB_DEVICE(USB_RR3USB_VENDOR_ID, USB_RR3IIUSB_PRODUCT_ID)}, 168 {} /* Terminating entry */ 169 }; 170 171 /* Structure to hold all of our device specific stuff */ 172 struct redrat3_dev { 173 /* core device bits */ 174 struct rc_dev *rc; 175 struct device *dev; 176 177 /* save off the usb device pointer */ 178 struct usb_device *udev; 179 180 /* the receive endpoint */ 181 struct usb_endpoint_descriptor *ep_in; 182 /* the buffer to receive data */ 183 unsigned char *bulk_in_buf; 184 /* urb used to read ir data */ 185 struct urb *read_urb; 186 187 /* the send endpoint */ 188 struct usb_endpoint_descriptor *ep_out; 189 /* the buffer to send data */ 190 unsigned char *bulk_out_buf; 191 /* the urb used to send data */ 192 struct urb *write_urb; 193 194 /* usb dma */ 195 dma_addr_t dma_in; 196 dma_addr_t dma_out; 197 198 /* rx signal timeout timer */ 199 struct timer_list rx_timeout; 200 u32 hw_timeout; 201 202 /* is the detector enabled*/ 203 bool det_enabled; 204 /* Is the device currently transmitting?*/ 205 bool transmitting; 206 207 /* store for current packet */ 208 char pbuf[RR3_MAX_BUF_SIZE]; 209 u16 pktlen; 210 u16 pkttype; 211 u16 bytes_read; 212 /* indicate whether we are going to reprocess 213 * the USB callback with a bigger buffer */ 214 int buftoosmall; 215 char *datap; 216 217 u32 carrier; 218 219 char name[128]; 220 char phys[64]; 221 }; 222 223 /* All incoming data buffers adhere to a very specific data format */ 224 struct redrat3_signal_header { 225 u16 length; /* Length of data being transferred */ 226 u16 transfer_type; /* Type of data transferred */ 227 u32 pause; /* Pause between main and repeat signals */ 228 u16 mod_freq_count; /* Value of timer on mod. freq. measurement */ 229 u16 no_periods; /* No. of periods over which mod. freq. is measured */ 230 u8 max_lengths; /* Max no. of lengths (i.e. size of array) */ 231 u8 no_lengths; /* Actual no. of elements in lengths array */ 232 u16 max_sig_size; /* Max no. of values in signal data array */ 233 u16 sig_size; /* Acuto no. of values in signal data array */ 234 u8 no_repeats; /* No. of repeats of repeat signal section */ 235 /* Here forward is the lengths and signal data */ 236 }; 237 238 static void redrat3_dump_signal_header(struct redrat3_signal_header *header) 239 { 240 pr_info("%s:\n", __func__); 241 pr_info(" * length: %u, transfer_type: 0x%02x\n", 242 header->length, header->transfer_type); 243 pr_info(" * pause: %u, freq_count: %u, no_periods: %u\n", 244 header->pause, header->mod_freq_count, header->no_periods); 245 pr_info(" * lengths: %u (max: %u)\n", 246 header->no_lengths, header->max_lengths); 247 pr_info(" * sig_size: %u (max: %u)\n", 248 header->sig_size, header->max_sig_size); 249 pr_info(" * repeats: %u\n", header->no_repeats); 250 } 251 252 static void redrat3_dump_signal_data(char *buffer, u16 len) 253 { 254 int offset, i; 255 char *data_vals; 256 257 pr_info("%s:", __func__); 258 259 offset = RR3_TX_HEADER_OFFSET + RR3_HEADER_LENGTH 260 + (RR3_DRIVER_MAXLENS * sizeof(u16)); 261 262 /* read RR3_DRIVER_MAXLENS from ctrl msg */ 263 data_vals = buffer + offset; 264 265 for (i = 0; i < len; i++) { 266 if (i % 10 == 0) 267 pr_cont("\n * "); 268 pr_cont("%02x ", *data_vals++); 269 } 270 271 pr_cont("\n"); 272 } 273 274 /* 275 * redrat3_issue_async 276 * 277 * Issues an async read to the ir data in port.. 278 * sets the callback to be redrat3_handle_async 279 */ 280 static void redrat3_issue_async(struct redrat3_dev *rr3) 281 { 282 int res; 283 284 rr3_ftr(rr3->dev, "Entering %s\n", __func__); 285 286 memset(rr3->bulk_in_buf, 0, rr3->ep_in->wMaxPacketSize); 287 res = usb_submit_urb(rr3->read_urb, GFP_ATOMIC); 288 if (res) 289 rr3_dbg(rr3->dev, "%s: receive request FAILED! " 290 "(res %d, len %d)\n", __func__, res, 291 rr3->read_urb->transfer_buffer_length); 292 } 293 294 static void redrat3_dump_fw_error(struct redrat3_dev *rr3, int code) 295 { 296 if (!rr3->transmitting && (code != 0x40)) 297 dev_info(rr3->dev, "fw error code 0x%02x: ", code); 298 299 switch (code) { 300 case 0x00: 301 pr_cont("No Error\n"); 302 break; 303 304 /* Codes 0x20 through 0x2f are IR Firmware Errors */ 305 case 0x20: 306 pr_cont("Initial signal pulse not long enough " 307 "to measure carrier frequency\n"); 308 break; 309 case 0x21: 310 pr_cont("Not enough length values allocated for signal\n"); 311 break; 312 case 0x22: 313 pr_cont("Not enough memory allocated for signal data\n"); 314 break; 315 case 0x23: 316 pr_cont("Too many signal repeats\n"); 317 break; 318 case 0x28: 319 pr_cont("Insufficient memory available for IR signal " 320 "data memory allocation\n"); 321 break; 322 case 0x29: 323 pr_cont("Insufficient memory available " 324 "for IrDa signal data memory allocation\n"); 325 break; 326 327 /* Codes 0x30 through 0x3f are USB Firmware Errors */ 328 case 0x30: 329 pr_cont("Insufficient memory available for bulk " 330 "transfer structure\n"); 331 break; 332 333 /* 334 * Other error codes... These are primarily errors that can occur in 335 * the control messages sent to the redrat 336 */ 337 case 0x40: 338 if (!rr3->transmitting) 339 pr_cont("Signal capture has been terminated\n"); 340 break; 341 case 0x41: 342 pr_cont("Attempt to set/get and unknown signal I/O " 343 "algorithm parameter\n"); 344 break; 345 case 0x42: 346 pr_cont("Signal capture already started\n"); 347 break; 348 349 default: 350 pr_cont("Unknown Error\n"); 351 break; 352 } 353 } 354 355 static u32 redrat3_val_to_mod_freq(struct redrat3_signal_header *ph) 356 { 357 u32 mod_freq = 0; 358 359 if (ph->mod_freq_count != 0) 360 mod_freq = (RR3_CLK * ph->no_periods) / 361 (ph->mod_freq_count * RR3_CLK_PER_COUNT); 362 363 return mod_freq; 364 } 365 366 /* this function scales down the figures for the same result... */ 367 static u32 redrat3_len_to_us(u32 length) 368 { 369 u32 biglen = length * 1000; 370 u32 divisor = (RR3_CLK_CONV_FACTOR) / 1000; 371 u32 result = (u32) (biglen / divisor); 372 373 /* don't allow zero lengths to go back, breaks lirc */ 374 return result ? result : 1; 375 } 376 377 /* 378 * convert us back into redrat3 lengths 379 * 380 * length * 1000 length * 1000000 381 * ------------- = ---------------- = micro 382 * rr3clk / 1000 rr3clk 383 384 * 6 * 2 4 * 3 micro * rr3clk micro * rr3clk / 1000 385 * ----- = 4 ----- = 6 -------------- = len --------------------- 386 * 3 2 1000000 1000 387 */ 388 static u32 redrat3_us_to_len(u32 microsec) 389 { 390 u32 result; 391 u32 divisor; 392 393 microsec &= IR_MAX_DURATION; 394 divisor = (RR3_CLK_CONV_FACTOR / 1000); 395 result = (u32)(microsec * divisor) / 1000; 396 397 /* don't allow zero lengths to go back, breaks lirc */ 398 return result ? result : 1; 399 400 } 401 402 /* timer callback to send reset event */ 403 static void redrat3_rx_timeout(unsigned long data) 404 { 405 struct redrat3_dev *rr3 = (struct redrat3_dev *)data; 406 407 rr3_dbg(rr3->dev, "calling ir_raw_event_reset\n"); 408 ir_raw_event_reset(rr3->rc); 409 } 410 411 static void redrat3_process_ir_data(struct redrat3_dev *rr3) 412 { 413 DEFINE_IR_RAW_EVENT(rawir); 414 struct redrat3_signal_header header; 415 struct device *dev; 416 int i, trailer = 0; 417 unsigned long delay; 418 u32 mod_freq, single_len; 419 u16 *len_vals; 420 u8 *data_vals; 421 u32 tmp32; 422 u16 tmp16; 423 char *sig_data; 424 425 if (!rr3) { 426 pr_err("%s called with no context!\n", __func__); 427 return; 428 } 429 430 rr3_ftr(rr3->dev, "Entered %s\n", __func__); 431 432 dev = rr3->dev; 433 sig_data = rr3->pbuf; 434 435 header.length = rr3->pktlen; 436 header.transfer_type = rr3->pkttype; 437 438 /* Sanity check */ 439 if (!(header.length >= RR3_HEADER_LENGTH)) 440 dev_warn(dev, "read returned less than rr3 header len\n"); 441 442 /* Make sure we reset the IR kfifo after a bit of inactivity */ 443 delay = usecs_to_jiffies(rr3->hw_timeout); 444 mod_timer(&rr3->rx_timeout, jiffies + delay); 445 446 memcpy(&tmp32, sig_data + RR3_PAUSE_OFFSET, sizeof(tmp32)); 447 header.pause = be32_to_cpu(tmp32); 448 449 memcpy(&tmp16, sig_data + RR3_FREQ_COUNT_OFFSET, sizeof(tmp16)); 450 header.mod_freq_count = be16_to_cpu(tmp16); 451 452 memcpy(&tmp16, sig_data + RR3_NUM_PERIOD_OFFSET, sizeof(tmp16)); 453 header.no_periods = be16_to_cpu(tmp16); 454 455 header.max_lengths = sig_data[RR3_MAX_LENGTHS_OFFSET]; 456 header.no_lengths = sig_data[RR3_NUM_LENGTHS_OFFSET]; 457 458 memcpy(&tmp16, sig_data + RR3_MAX_SIGS_OFFSET, sizeof(tmp16)); 459 header.max_sig_size = be16_to_cpu(tmp16); 460 461 memcpy(&tmp16, sig_data + RR3_NUM_SIGS_OFFSET, sizeof(tmp16)); 462 header.sig_size = be16_to_cpu(tmp16); 463 464 header.no_repeats= sig_data[RR3_REPEATS_OFFSET]; 465 466 if (debug) { 467 redrat3_dump_signal_header(&header); 468 redrat3_dump_signal_data(sig_data, header.sig_size); 469 } 470 471 mod_freq = redrat3_val_to_mod_freq(&header); 472 rr3_dbg(dev, "Got mod_freq of %u\n", mod_freq); 473 474 /* Here we pull out the 'length' values from the signal */ 475 len_vals = (u16 *)(sig_data + RR3_HEADER_LENGTH); 476 477 data_vals = sig_data + RR3_HEADER_LENGTH + 478 (header.max_lengths * sizeof(u16)); 479 480 /* process each rr3 encoded byte into an int */ 481 for (i = 0; i < header.sig_size; i++) { 482 u16 val = len_vals[data_vals[i]]; 483 single_len = redrat3_len_to_us((u32)be16_to_cpu(val)); 484 485 /* we should always get pulse/space/pulse/space samples */ 486 if (i % 2) 487 rawir.pulse = false; 488 else 489 rawir.pulse = true; 490 491 rawir.duration = US_TO_NS(single_len); 492 /* Save initial pulse length to fudge trailer */ 493 if (i == 0) 494 trailer = rawir.duration; 495 /* cap the value to IR_MAX_DURATION */ 496 rawir.duration &= IR_MAX_DURATION; 497 498 rr3_dbg(dev, "storing %s with duration %d (i: %d)\n", 499 rawir.pulse ? "pulse" : "space", rawir.duration, i); 500 ir_raw_event_store_with_filter(rr3->rc, &rawir); 501 } 502 503 /* add a trailing space, if need be */ 504 if (i % 2) { 505 rawir.pulse = false; 506 /* this duration is made up, and may not be ideal... */ 507 if (trailer < US_TO_NS(1000)) 508 rawir.duration = US_TO_NS(2800); 509 else 510 rawir.duration = trailer; 511 rr3_dbg(dev, "storing trailing space with duration %d\n", 512 rawir.duration); 513 ir_raw_event_store_with_filter(rr3->rc, &rawir); 514 } 515 516 rr3_dbg(dev, "calling ir_raw_event_handle\n"); 517 ir_raw_event_handle(rr3->rc); 518 519 return; 520 } 521 522 /* Util fn to send rr3 cmds */ 523 static u8 redrat3_send_cmd(int cmd, struct redrat3_dev *rr3) 524 { 525 struct usb_device *udev; 526 u8 *data; 527 int res; 528 529 data = kzalloc(sizeof(u8), GFP_KERNEL); 530 if (!data) 531 return -ENOMEM; 532 533 udev = rr3->udev; 534 res = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), cmd, 535 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 536 0x0000, 0x0000, data, sizeof(u8), HZ * 10); 537 538 if (res < 0) { 539 dev_err(rr3->dev, "%s: Error sending rr3 cmd res %d, data %d", 540 __func__, res, *data); 541 res = -EIO; 542 } else 543 res = (u8)data[0]; 544 545 kfree(data); 546 547 return res; 548 } 549 550 /* Enables the long range detector and starts async receive */ 551 static int redrat3_enable_detector(struct redrat3_dev *rr3) 552 { 553 struct device *dev = rr3->dev; 554 u8 ret; 555 556 rr3_ftr(dev, "Entering %s\n", __func__); 557 558 ret = redrat3_send_cmd(RR3_RC_DET_ENABLE, rr3); 559 if (ret != 0) 560 dev_dbg(dev, "%s: unexpected ret of %d\n", 561 __func__, ret); 562 563 ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3); 564 if (ret != 1) { 565 dev_err(dev, "%s: detector status: %d, should be 1\n", 566 __func__, ret); 567 return -EIO; 568 } 569 570 rr3->det_enabled = true; 571 redrat3_issue_async(rr3); 572 573 return 0; 574 } 575 576 /* Disables the rr3 long range detector */ 577 static void redrat3_disable_detector(struct redrat3_dev *rr3) 578 { 579 struct device *dev = rr3->dev; 580 u8 ret; 581 582 rr3_ftr(dev, "Entering %s\n", __func__); 583 584 ret = redrat3_send_cmd(RR3_RC_DET_DISABLE, rr3); 585 if (ret != 0) 586 dev_err(dev, "%s: failure!\n", __func__); 587 588 ret = redrat3_send_cmd(RR3_RC_DET_STATUS, rr3); 589 if (ret != 0) 590 dev_warn(dev, "%s: detector status: %d, should be 0\n", 591 __func__, ret); 592 593 rr3->det_enabled = false; 594 } 595 596 static inline void redrat3_delete(struct redrat3_dev *rr3, 597 struct usb_device *udev) 598 { 599 rr3_ftr(rr3->dev, "%s cleaning up\n", __func__); 600 usb_kill_urb(rr3->read_urb); 601 usb_kill_urb(rr3->write_urb); 602 603 usb_free_urb(rr3->read_urb); 604 usb_free_urb(rr3->write_urb); 605 606 usb_free_coherent(udev, rr3->ep_in->wMaxPacketSize, 607 rr3->bulk_in_buf, rr3->dma_in); 608 usb_free_coherent(udev, rr3->ep_out->wMaxPacketSize, 609 rr3->bulk_out_buf, rr3->dma_out); 610 611 kfree(rr3); 612 } 613 614 static u32 redrat3_get_timeout(struct redrat3_dev *rr3) 615 { 616 u32 *tmp; 617 u32 timeout = MS_TO_US(150); /* a sane default, if things go haywire */ 618 int len, ret, pipe; 619 620 len = sizeof(*tmp); 621 tmp = kzalloc(len, GFP_KERNEL); 622 if (!tmp) { 623 dev_warn(rr3->dev, "Memory allocation faillure\n"); 624 return timeout; 625 } 626 627 pipe = usb_rcvctrlpipe(rr3->udev, 0); 628 ret = usb_control_msg(rr3->udev, pipe, RR3_GET_IR_PARAM, 629 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 630 RR3_IR_IO_SIG_TIMEOUT, 0, tmp, len, HZ * 5); 631 if (ret != len) { 632 dev_warn(rr3->dev, "Failed to read timeout from hardware\n"); 633 return timeout; 634 } 635 636 timeout = redrat3_len_to_us(be32_to_cpu(*tmp)); 637 638 rr3_dbg(rr3->dev, "Got timeout of %d ms\n", timeout / 1000); 639 return timeout; 640 } 641 642 static void redrat3_reset(struct redrat3_dev *rr3) 643 { 644 struct usb_device *udev = rr3->udev; 645 struct device *dev = rr3->dev; 646 int rc, rxpipe, txpipe; 647 u8 *val; 648 int len = sizeof(u8); 649 650 rr3_ftr(dev, "Entering %s\n", __func__); 651 652 rxpipe = usb_rcvctrlpipe(udev, 0); 653 txpipe = usb_sndctrlpipe(udev, 0); 654 655 val = kzalloc(len, GFP_KERNEL); 656 if (!val) { 657 dev_err(dev, "Memory allocation failure\n"); 658 return; 659 } 660 661 *val = 0x01; 662 rc = usb_control_msg(udev, rxpipe, RR3_RESET, 663 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 664 RR3_CPUCS_REG_ADDR, 0, val, len, HZ * 25); 665 rr3_dbg(dev, "reset returned 0x%02x\n", rc); 666 667 *val = 5; 668 rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, 669 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 670 RR3_IR_IO_LENGTH_FUZZ, 0, val, len, HZ * 25); 671 rr3_dbg(dev, "set ir parm len fuzz %d rc 0x%02x\n", *val, rc); 672 673 *val = RR3_DRIVER_MAXLENS; 674 rc = usb_control_msg(udev, txpipe, RR3_SET_IR_PARAM, 675 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_OUT, 676 RR3_IR_IO_MAX_LENGTHS, 0, val, len, HZ * 25); 677 rr3_dbg(dev, "set ir parm max lens %d rc 0x%02x\n", *val, rc); 678 679 kfree(val); 680 } 681 682 static void redrat3_get_firmware_rev(struct redrat3_dev *rr3) 683 { 684 int rc = 0; 685 char *buffer; 686 687 rr3_ftr(rr3->dev, "Entering %s\n", __func__); 688 689 buffer = kzalloc(sizeof(char) * (RR3_FW_VERSION_LEN + 1), GFP_KERNEL); 690 if (!buffer) { 691 dev_err(rr3->dev, "Memory allocation failure\n"); 692 return; 693 } 694 695 rc = usb_control_msg(rr3->udev, usb_rcvctrlpipe(rr3->udev, 0), 696 RR3_FW_VERSION, 697 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 698 0, 0, buffer, RR3_FW_VERSION_LEN, HZ * 5); 699 700 if (rc >= 0) 701 dev_info(rr3->dev, "Firmware rev: %s", buffer); 702 else 703 dev_err(rr3->dev, "Problem fetching firmware ID\n"); 704 705 kfree(buffer); 706 rr3_ftr(rr3->dev, "Exiting %s\n", __func__); 707 } 708 709 static void redrat3_read_packet_start(struct redrat3_dev *rr3, int len) 710 { 711 u16 tx_error; 712 u16 hdrlen; 713 714 rr3_ftr(rr3->dev, "Entering %s\n", __func__); 715 716 /* grab the Length and type of transfer */ 717 memcpy(&(rr3->pktlen), (unsigned char *) rr3->bulk_in_buf, 718 sizeof(rr3->pktlen)); 719 memcpy(&(rr3->pkttype), ((unsigned char *) rr3->bulk_in_buf + 720 sizeof(rr3->pktlen)), 721 sizeof(rr3->pkttype)); 722 723 /*data needs conversion to know what its real values are*/ 724 rr3->pktlen = be16_to_cpu(rr3->pktlen); 725 rr3->pkttype = be16_to_cpu(rr3->pkttype); 726 727 switch (rr3->pkttype) { 728 case RR3_ERROR: 729 memcpy(&tx_error, ((unsigned char *)rr3->bulk_in_buf 730 + (sizeof(rr3->pktlen) + sizeof(rr3->pkttype))), 731 sizeof(tx_error)); 732 tx_error = be16_to_cpu(tx_error); 733 redrat3_dump_fw_error(rr3, tx_error); 734 break; 735 736 case RR3_MOD_SIGNAL_IN: 737 hdrlen = sizeof(rr3->pktlen) + sizeof(rr3->pkttype); 738 rr3->bytes_read = len; 739 rr3->bytes_read -= hdrlen; 740 rr3->datap = &(rr3->pbuf[0]); 741 742 memcpy(rr3->datap, ((unsigned char *)rr3->bulk_in_buf + hdrlen), 743 rr3->bytes_read); 744 rr3->datap += rr3->bytes_read; 745 rr3_dbg(rr3->dev, "bytes_read %d, pktlen %d\n", 746 rr3->bytes_read, rr3->pktlen); 747 break; 748 749 default: 750 rr3_dbg(rr3->dev, "ignoring packet with type 0x%02x, " 751 "len of %d, 0x%02x\n", rr3->pkttype, len, rr3->pktlen); 752 break; 753 } 754 } 755 756 static void redrat3_read_packet_continue(struct redrat3_dev *rr3, int len) 757 { 758 759 rr3_ftr(rr3->dev, "Entering %s\n", __func__); 760 761 memcpy(rr3->datap, (unsigned char *)rr3->bulk_in_buf, len); 762 rr3->datap += len; 763 764 rr3->bytes_read += len; 765 rr3_dbg(rr3->dev, "bytes_read %d, pktlen %d\n", 766 rr3->bytes_read, rr3->pktlen); 767 } 768 769 /* gather IR data from incoming urb, process it when we have enough */ 770 static int redrat3_get_ir_data(struct redrat3_dev *rr3, int len) 771 { 772 struct device *dev = rr3->dev; 773 int ret = 0; 774 775 rr3_ftr(dev, "Entering %s\n", __func__); 776 777 if (rr3->pktlen > RR3_MAX_BUF_SIZE) { 778 dev_err(rr3->dev, "error: packet larger than buffer\n"); 779 ret = -EINVAL; 780 goto out; 781 } 782 783 if ((rr3->bytes_read == 0) && 784 (len >= (sizeof(rr3->pkttype) + sizeof(rr3->pktlen)))) { 785 redrat3_read_packet_start(rr3, len); 786 } else if (rr3->bytes_read != 0) { 787 redrat3_read_packet_continue(rr3, len); 788 } else if (rr3->bytes_read == 0) { 789 dev_err(dev, "error: no packet data read\n"); 790 ret = -ENODATA; 791 goto out; 792 } 793 794 if (rr3->bytes_read > rr3->pktlen) { 795 dev_err(dev, "bytes_read (%d) greater than pktlen (%d)\n", 796 rr3->bytes_read, rr3->pktlen); 797 ret = -EINVAL; 798 goto out; 799 } else if (rr3->bytes_read < rr3->pktlen) 800 /* we're still accumulating data */ 801 return 0; 802 803 /* if we get here, we've got IR data to decode */ 804 if (rr3->pkttype == RR3_MOD_SIGNAL_IN) 805 redrat3_process_ir_data(rr3); 806 else 807 rr3_dbg(dev, "discarding non-signal data packet " 808 "(type 0x%02x)\n", rr3->pkttype); 809 810 out: 811 rr3->bytes_read = 0; 812 rr3->pktlen = 0; 813 rr3->pkttype = 0; 814 return ret; 815 } 816 817 /* callback function from USB when async USB request has completed */ 818 static void redrat3_handle_async(struct urb *urb, struct pt_regs *regs) 819 { 820 struct redrat3_dev *rr3; 821 int ret; 822 823 if (!urb) 824 return; 825 826 rr3 = urb->context; 827 if (!rr3) { 828 pr_err("%s called with invalid context!\n", __func__); 829 usb_unlink_urb(urb); 830 return; 831 } 832 833 rr3_ftr(rr3->dev, "Entering %s\n", __func__); 834 835 switch (urb->status) { 836 case 0: 837 ret = redrat3_get_ir_data(rr3, urb->actual_length); 838 if (!ret) { 839 /* no error, prepare to read more */ 840 redrat3_issue_async(rr3); 841 } 842 break; 843 844 case -ECONNRESET: 845 case -ENOENT: 846 case -ESHUTDOWN: 847 usb_unlink_urb(urb); 848 return; 849 850 case -EPIPE: 851 default: 852 dev_warn(rr3->dev, "Error: urb status = %d\n", urb->status); 853 rr3->bytes_read = 0; 854 rr3->pktlen = 0; 855 rr3->pkttype = 0; 856 break; 857 } 858 } 859 860 static void redrat3_write_bulk_callback(struct urb *urb, struct pt_regs *regs) 861 { 862 struct redrat3_dev *rr3; 863 int len; 864 865 if (!urb) 866 return; 867 868 rr3 = urb->context; 869 if (rr3) { 870 len = urb->actual_length; 871 rr3_ftr(rr3->dev, "%s: called (status=%d len=%d)\n", 872 __func__, urb->status, len); 873 } 874 } 875 876 static u16 mod_freq_to_val(unsigned int mod_freq) 877 { 878 int mult = 6000000; 879 880 /* Clk used in mod. freq. generation is CLK24/4. */ 881 return (u16)(65536 - (mult / mod_freq)); 882 } 883 884 static int redrat3_set_tx_carrier(struct rc_dev *rcdev, u32 carrier) 885 { 886 struct redrat3_dev *rr3 = rcdev->priv; 887 struct device *dev = rr3->dev; 888 889 rr3_dbg(dev, "Setting modulation frequency to %u", carrier); 890 if (carrier == 0) 891 return -EINVAL; 892 893 rr3->carrier = carrier; 894 895 return carrier; 896 } 897 898 static int redrat3_transmit_ir(struct rc_dev *rcdev, unsigned *txbuf, 899 unsigned count) 900 { 901 struct redrat3_dev *rr3 = rcdev->priv; 902 struct device *dev = rr3->dev; 903 struct redrat3_signal_header header; 904 int i, j, ret, ret_len, offset; 905 int lencheck, cur_sample_len, pipe; 906 char *buffer = NULL, *sigdata = NULL; 907 int *sample_lens = NULL; 908 u32 tmpi; 909 u16 tmps; 910 u8 *datap; 911 u8 curlencheck = 0; 912 u16 *lengths_ptr; 913 int sendbuf_len; 914 915 rr3_ftr(dev, "Entering %s\n", __func__); 916 917 if (rr3->transmitting) { 918 dev_warn(dev, "%s: transmitter already in use\n", __func__); 919 return -EAGAIN; 920 } 921 922 count = min_t(unsigned, count, RR3_MAX_SIG_SIZE - RR3_TX_TRAILER_LEN); 923 924 /* rr3 will disable rc detector on transmit */ 925 rr3->det_enabled = false; 926 rr3->transmitting = true; 927 928 sample_lens = kzalloc(sizeof(int) * RR3_DRIVER_MAXLENS, GFP_KERNEL); 929 if (!sample_lens) { 930 ret = -ENOMEM; 931 goto out; 932 } 933 934 for (i = 0; i < count; i++) { 935 cur_sample_len = redrat3_us_to_len(txbuf[i]); 936 for (lencheck = 0; lencheck < curlencheck; lencheck++) { 937 if (sample_lens[lencheck] == cur_sample_len) 938 break; 939 } 940 if (lencheck == curlencheck) { 941 rr3_dbg(dev, "txbuf[%d]=%u, pos %d, enc %u\n", 942 i, txbuf[i], curlencheck, cur_sample_len); 943 if (curlencheck < RR3_DRIVER_MAXLENS) { 944 /* now convert the value to a proper 945 * rr3 value.. */ 946 sample_lens[curlencheck] = cur_sample_len; 947 curlencheck++; 948 } else { 949 count = i - 1; 950 break; 951 } 952 } 953 } 954 955 sigdata = kzalloc((count + RR3_TX_TRAILER_LEN), GFP_KERNEL); 956 if (!sigdata) { 957 ret = -ENOMEM; 958 goto out; 959 } 960 961 sigdata[count] = RR3_END_OF_SIGNAL; 962 sigdata[count + 1] = RR3_END_OF_SIGNAL; 963 for (i = 0; i < count; i++) { 964 for (j = 0; j < curlencheck; j++) { 965 if (sample_lens[j] == redrat3_us_to_len(txbuf[i])) 966 sigdata[i] = j; 967 } 968 } 969 970 offset = RR3_TX_HEADER_OFFSET; 971 sendbuf_len = RR3_HEADER_LENGTH + (sizeof(u16) * RR3_DRIVER_MAXLENS) 972 + count + RR3_TX_TRAILER_LEN + offset; 973 974 buffer = kzalloc(sendbuf_len, GFP_KERNEL); 975 if (!buffer) { 976 ret = -ENOMEM; 977 goto out; 978 } 979 980 /* fill in our packet header */ 981 header.length = sendbuf_len - offset; 982 header.transfer_type = RR3_MOD_SIGNAL_OUT; 983 header.pause = redrat3_len_to_us(100); 984 header.mod_freq_count = mod_freq_to_val(rr3->carrier); 985 header.no_periods = 0; /* n/a to transmit */ 986 header.max_lengths = RR3_DRIVER_MAXLENS; 987 header.no_lengths = curlencheck; 988 header.max_sig_size = RR3_MAX_SIG_SIZE; 989 header.sig_size = count + RR3_TX_TRAILER_LEN; 990 /* we currently rely on repeat handling in the IR encoding source */ 991 header.no_repeats = 0; 992 993 tmps = cpu_to_be16(header.length); 994 memcpy(buffer, &tmps, 2); 995 996 tmps = cpu_to_be16(header.transfer_type); 997 memcpy(buffer + 2, &tmps, 2); 998 999 tmpi = cpu_to_be32(header.pause); 1000 memcpy(buffer + offset, &tmpi, sizeof(tmpi)); 1001 1002 tmps = cpu_to_be16(header.mod_freq_count); 1003 memcpy(buffer + offset + RR3_FREQ_COUNT_OFFSET, &tmps, 2); 1004 1005 buffer[offset + RR3_NUM_LENGTHS_OFFSET] = header.no_lengths; 1006 1007 tmps = cpu_to_be16(header.sig_size); 1008 memcpy(buffer + offset + RR3_NUM_SIGS_OFFSET, &tmps, 2); 1009 1010 buffer[offset + RR3_REPEATS_OFFSET] = header.no_repeats; 1011 1012 lengths_ptr = (u16 *)(buffer + offset + RR3_HEADER_LENGTH); 1013 for (i = 0; i < curlencheck; ++i) 1014 lengths_ptr[i] = cpu_to_be16(sample_lens[i]); 1015 1016 datap = (u8 *)(buffer + offset + RR3_HEADER_LENGTH + 1017 (sizeof(u16) * RR3_DRIVER_MAXLENS)); 1018 memcpy(datap, sigdata, (count + RR3_TX_TRAILER_LEN)); 1019 1020 if (debug) { 1021 redrat3_dump_signal_header(&header); 1022 redrat3_dump_signal_data(buffer, header.sig_size); 1023 } 1024 1025 pipe = usb_sndbulkpipe(rr3->udev, rr3->ep_out->bEndpointAddress); 1026 tmps = usb_bulk_msg(rr3->udev, pipe, buffer, 1027 sendbuf_len, &ret_len, 10 * HZ); 1028 rr3_dbg(dev, "sent %d bytes, (ret %d)\n", ret_len, tmps); 1029 1030 /* now tell the hardware to transmit what we sent it */ 1031 pipe = usb_rcvctrlpipe(rr3->udev, 0); 1032 ret = usb_control_msg(rr3->udev, pipe, RR3_TX_SEND_SIGNAL, 1033 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN, 1034 0, 0, buffer, 2, HZ * 10); 1035 1036 if (ret < 0) 1037 dev_err(dev, "Error: control msg send failed, rc %d\n", ret); 1038 else 1039 ret = count; 1040 1041 out: 1042 kfree(sample_lens); 1043 kfree(buffer); 1044 kfree(sigdata); 1045 1046 rr3->transmitting = false; 1047 /* rr3 re-enables rc detector because it was enabled before */ 1048 rr3->det_enabled = true; 1049 1050 return ret; 1051 } 1052 1053 static struct rc_dev *redrat3_init_rc_dev(struct redrat3_dev *rr3) 1054 { 1055 struct device *dev = rr3->dev; 1056 struct rc_dev *rc; 1057 int ret = -ENODEV; 1058 u16 prod = le16_to_cpu(rr3->udev->descriptor.idProduct); 1059 1060 rc = rc_allocate_device(); 1061 if (!rc) { 1062 dev_err(dev, "remote input dev allocation failed\n"); 1063 goto out; 1064 } 1065 1066 snprintf(rr3->name, sizeof(rr3->name), "RedRat3%s " 1067 "Infrared Remote Transceiver (%04x:%04x)", 1068 prod == USB_RR3IIUSB_PRODUCT_ID ? "-II" : "", 1069 le16_to_cpu(rr3->udev->descriptor.idVendor), prod); 1070 1071 usb_make_path(rr3->udev, rr3->phys, sizeof(rr3->phys)); 1072 1073 rc->input_name = rr3->name; 1074 rc->input_phys = rr3->phys; 1075 usb_to_input_id(rr3->udev, &rc->input_id); 1076 rc->dev.parent = dev; 1077 rc->priv = rr3; 1078 rc->driver_type = RC_DRIVER_IR_RAW; 1079 rc->allowed_protos = RC_BIT_ALL; 1080 rc->timeout = US_TO_NS(2750); 1081 rc->tx_ir = redrat3_transmit_ir; 1082 rc->s_tx_carrier = redrat3_set_tx_carrier; 1083 rc->driver_name = DRIVER_NAME; 1084 rc->rx_resolution = US_TO_NS(2); 1085 rc->map_name = RC_MAP_HAUPPAUGE; 1086 1087 ret = rc_register_device(rc); 1088 if (ret < 0) { 1089 dev_err(dev, "remote dev registration failed\n"); 1090 goto out; 1091 } 1092 1093 return rc; 1094 1095 out: 1096 rc_free_device(rc); 1097 return NULL; 1098 } 1099 1100 static int redrat3_dev_probe(struct usb_interface *intf, 1101 const struct usb_device_id *id) 1102 { 1103 struct usb_device *udev = interface_to_usbdev(intf); 1104 struct device *dev = &intf->dev; 1105 struct usb_host_interface *uhi; 1106 struct redrat3_dev *rr3; 1107 struct usb_endpoint_descriptor *ep; 1108 struct usb_endpoint_descriptor *ep_in = NULL; 1109 struct usb_endpoint_descriptor *ep_out = NULL; 1110 u8 addr, attrs; 1111 int pipe, i; 1112 int retval = -ENOMEM; 1113 1114 rr3_ftr(dev, "%s called\n", __func__); 1115 1116 uhi = intf->cur_altsetting; 1117 1118 /* find our bulk-in and bulk-out endpoints */ 1119 for (i = 0; i < uhi->desc.bNumEndpoints; ++i) { 1120 ep = &uhi->endpoint[i].desc; 1121 addr = ep->bEndpointAddress; 1122 attrs = ep->bmAttributes; 1123 1124 if ((ep_in == NULL) && 1125 ((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) && 1126 ((attrs & USB_ENDPOINT_XFERTYPE_MASK) == 1127 USB_ENDPOINT_XFER_BULK)) { 1128 rr3_dbg(dev, "found bulk-in endpoint at 0x%02x\n", 1129 ep->bEndpointAddress); 1130 /* data comes in on 0x82, 0x81 is for other data... */ 1131 if (ep->bEndpointAddress == RR3_BULK_IN_EP_ADDR) 1132 ep_in = ep; 1133 } 1134 1135 if ((ep_out == NULL) && 1136 ((addr & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) && 1137 ((attrs & USB_ENDPOINT_XFERTYPE_MASK) == 1138 USB_ENDPOINT_XFER_BULK)) { 1139 rr3_dbg(dev, "found bulk-out endpoint at 0x%02x\n", 1140 ep->bEndpointAddress); 1141 ep_out = ep; 1142 } 1143 } 1144 1145 if (!ep_in || !ep_out) { 1146 dev_err(dev, "Couldn't find both in and out endpoints\n"); 1147 retval = -ENODEV; 1148 goto no_endpoints; 1149 } 1150 1151 /* allocate memory for our device state and initialize it */ 1152 rr3 = kzalloc(sizeof(*rr3), GFP_KERNEL); 1153 if (rr3 == NULL) { 1154 dev_err(dev, "Memory allocation failure\n"); 1155 goto no_endpoints; 1156 } 1157 1158 rr3->dev = &intf->dev; 1159 1160 /* set up bulk-in endpoint */ 1161 rr3->read_urb = usb_alloc_urb(0, GFP_KERNEL); 1162 if (!rr3->read_urb) { 1163 dev_err(dev, "Read urb allocation failure\n"); 1164 goto error; 1165 } 1166 1167 rr3->ep_in = ep_in; 1168 rr3->bulk_in_buf = usb_alloc_coherent(udev, ep_in->wMaxPacketSize, 1169 GFP_ATOMIC, &rr3->dma_in); 1170 if (!rr3->bulk_in_buf) { 1171 dev_err(dev, "Read buffer allocation failure\n"); 1172 goto error; 1173 } 1174 1175 pipe = usb_rcvbulkpipe(udev, ep_in->bEndpointAddress); 1176 usb_fill_bulk_urb(rr3->read_urb, udev, pipe, 1177 rr3->bulk_in_buf, ep_in->wMaxPacketSize, 1178 (usb_complete_t)redrat3_handle_async, rr3); 1179 1180 /* set up bulk-out endpoint*/ 1181 rr3->write_urb = usb_alloc_urb(0, GFP_KERNEL); 1182 if (!rr3->write_urb) { 1183 dev_err(dev, "Write urb allocation failure\n"); 1184 goto error; 1185 } 1186 1187 rr3->ep_out = ep_out; 1188 rr3->bulk_out_buf = usb_alloc_coherent(udev, ep_out->wMaxPacketSize, 1189 GFP_ATOMIC, &rr3->dma_out); 1190 if (!rr3->bulk_out_buf) { 1191 dev_err(dev, "Write buffer allocation failure\n"); 1192 goto error; 1193 } 1194 1195 pipe = usb_sndbulkpipe(udev, ep_out->bEndpointAddress); 1196 usb_fill_bulk_urb(rr3->write_urb, udev, pipe, 1197 rr3->bulk_out_buf, ep_out->wMaxPacketSize, 1198 (usb_complete_t)redrat3_write_bulk_callback, rr3); 1199 1200 rr3->udev = udev; 1201 1202 redrat3_reset(rr3); 1203 redrat3_get_firmware_rev(rr3); 1204 1205 /* might be all we need to do? */ 1206 retval = redrat3_enable_detector(rr3); 1207 if (retval < 0) 1208 goto error; 1209 1210 /* store current hardware timeout, in us, will use for kfifo resets */ 1211 rr3->hw_timeout = redrat3_get_timeout(rr3); 1212 1213 /* default.. will get overridden by any sends with a freq defined */ 1214 rr3->carrier = 38000; 1215 1216 rr3->rc = redrat3_init_rc_dev(rr3); 1217 if (!rr3->rc) { 1218 retval = -ENOMEM; 1219 goto error; 1220 } 1221 setup_timer(&rr3->rx_timeout, redrat3_rx_timeout, (unsigned long)rr3); 1222 1223 /* we can register the device now, as it is ready */ 1224 usb_set_intfdata(intf, rr3); 1225 1226 rr3_ftr(dev, "Exiting %s\n", __func__); 1227 return 0; 1228 1229 error: 1230 redrat3_delete(rr3, rr3->udev); 1231 1232 no_endpoints: 1233 dev_err(dev, "%s: retval = %x", __func__, retval); 1234 1235 return retval; 1236 } 1237 1238 static void redrat3_dev_disconnect(struct usb_interface *intf) 1239 { 1240 struct usb_device *udev = interface_to_usbdev(intf); 1241 struct redrat3_dev *rr3 = usb_get_intfdata(intf); 1242 1243 rr3_ftr(&intf->dev, "Entering %s\n", __func__); 1244 1245 if (!rr3) 1246 return; 1247 1248 redrat3_disable_detector(rr3); 1249 1250 usb_set_intfdata(intf, NULL); 1251 rc_unregister_device(rr3->rc); 1252 del_timer_sync(&rr3->rx_timeout); 1253 redrat3_delete(rr3, udev); 1254 1255 rr3_ftr(&intf->dev, "RedRat3 IR Transceiver now disconnected\n"); 1256 } 1257 1258 static int redrat3_dev_suspend(struct usb_interface *intf, pm_message_t message) 1259 { 1260 struct redrat3_dev *rr3 = usb_get_intfdata(intf); 1261 rr3_ftr(rr3->dev, "suspend\n"); 1262 usb_kill_urb(rr3->read_urb); 1263 return 0; 1264 } 1265 1266 static int redrat3_dev_resume(struct usb_interface *intf) 1267 { 1268 struct redrat3_dev *rr3 = usb_get_intfdata(intf); 1269 rr3_ftr(rr3->dev, "resume\n"); 1270 if (usb_submit_urb(rr3->read_urb, GFP_ATOMIC)) 1271 return -EIO; 1272 return 0; 1273 } 1274 1275 static struct usb_driver redrat3_dev_driver = { 1276 .name = DRIVER_NAME, 1277 .probe = redrat3_dev_probe, 1278 .disconnect = redrat3_dev_disconnect, 1279 .suspend = redrat3_dev_suspend, 1280 .resume = redrat3_dev_resume, 1281 .reset_resume = redrat3_dev_resume, 1282 .id_table = redrat3_dev_table 1283 }; 1284 1285 module_usb_driver(redrat3_dev_driver); 1286 1287 MODULE_DESCRIPTION(DRIVER_DESC); 1288 MODULE_AUTHOR(DRIVER_AUTHOR); 1289 MODULE_AUTHOR(DRIVER_AUTHOR2); 1290 MODULE_LICENSE("GPL"); 1291 MODULE_DEVICE_TABLE(usb, redrat3_dev_table); 1292 1293 module_param(debug, int, S_IRUGO | S_IWUSR); 1294 MODULE_PARM_DESC(debug, "Enable module debug spew. 0 = no debugging (default) " 1295 "0x1 = standard debug messages, 0x2 = function tracing debug. " 1296 "Flag bits are addative (i.e., 0x3 for both debug types)."); 1297