| | 1 | /* |
| | 2 | * |
| | 3 | * keyboard input driver for i2c IR remote controls |
| | 4 | * |
| | 5 | * Copyright (c) 2000-2003 Gerd Knorr <kraxel@bytesex.org> |
| | 6 | * modified for PixelView (BT878P+W/FM) by |
| | 7 | * Michal Kochanowicz <mkochano@pld.org.pl> |
| | 8 | * Christoph Bartelmus <lirc@bartelmus.de> |
| | 9 | * modified for KNC ONE TV Station/Anubis Typhoon TView Tuner by |
| | 10 | * Ulrich Mueller <ulrich.mueller42@web.de> |
| | 11 | * modified for em2820 based USB TV tuners by |
| | 12 | * Markus Rechberger <mrechberger@gmail.com> |
| | 13 | * modified for DViCO Fusion HDTV 5 RT GOLD by |
| | 14 | * Chaogui Zhang <czhang1974@gmail.com> |
| | 15 | * modified for MSI TV@nywhere Plus by |
| | 16 | * Henry Wong <henry@stuffedcow.net> |
| | 17 | * Mark Schultz <n9xmj@yahoo.com> |
| | 18 | * Brian Rogers <brian_rogers@comcast.net> |
| | 19 | * modified for AVerMedia Cardbus by |
| | 20 | * Oldrich Jedlicka <oldium.pro@seznam.cz> |
| | 21 | * Zilog Transmitter portions/ideas were derived from GPLv2+ sources: |
| | 22 | * - drivers/char/pctv_zilogir.[ch] from Hauppauge Broadway product |
| | 23 | * Copyright 2011 Hauppauge Computer works |
| | 24 | * - drivers/staging/media/lirc/lirc_zilog.c |
| | 25 | * Copyright (c) 2000 Gerd Knorr <kraxel@goldbach.in-berlin.de> |
| | 26 | * Michal Kochanowicz <mkochano@pld.org.pl> |
| | 27 | * Christoph Bartelmus <lirc@bartelmus.de> |
| | 28 | * Ulrich Mueller <ulrich.mueller42@web.de> |
| | 29 | * Stefan Jahn <stefan@lkcc.org> |
| | 30 | * Jerome Brock <jbrock@users.sourceforge.net> |
| | 31 | * Thomas Reitmayr (treitmayr@yahoo.com) |
| | 32 | * Mark Weaver <mark@npsl.co.uk> |
| | 33 | * Jarod Wilson <jarod@redhat.com> |
| | 34 | * Copyright (C) 2011 Andy Walls <awalls@md.metrocast.net> |
| | 35 | * |
| | 36 | * This program is free software; you can redistribute it and/or modify |
| | 37 | * it under the terms of the GNU General Public License as published by |
| | 38 | * the Free Software Foundation; either version 2 of the License, or |
| | 39 | * (at your option) any later version. |
| | 40 | * |
| | 41 | * This program is distributed in the hope that it will be useful, |
| | 42 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 43 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 44 | * GNU General Public License for more details. |
| | 45 | * |
| | 46 | */ |
| | 47 | |
| | 48 | #include <asm/unaligned.h> |
| | 49 | #include <linux/module.h> |
| | 50 | #include <linux/init.h> |
| | 51 | #include <linux/kernel.h> |
| | 52 | #include <linux/string.h> |
| | 53 | #include <linux/timer.h> |
| | 54 | #include <linux/delay.h> |
| | 55 | #include <linux/errno.h> |
| | 56 | #include <linux/slab.h> |
| | 57 | #include <linux/i2c.h> |
| | 58 | #include <linux/workqueue.h> |
| | 59 | |
| | 60 | #include <media/rc-core.h> |
| | 61 | #include <media/i2c/ir-kbd-i2c.h> |
| | 62 | |
| | 63 | #define FLAG_TX 1 |
| | 64 | #define FLAG_HDPVR 2 |
| | 65 | |
| | 66 | static bool enable_hdpvr; |
| | 67 | module_param(enable_hdpvr, bool, 0644); |
| | 68 | |
| | 69 | static int get_key_haup_common(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 70 | u32 *scancode, u8 *ptoggle, int size) |
| | 71 | { |
| | 72 | unsigned char buf[6]; |
| | 73 | int start, range, toggle, dev, code, ircode, vendor; |
| | 74 | |
| | 75 | /* poll IR chip */ |
| | 76 | if (size != i2c_master_recv(ir->c, buf, size)) |
| | 77 | return -EIO; |
| | 78 | |
| | 79 | if (buf[0] & 0x80) { |
| | 80 | int offset = (size == 6) ? 3 : 0; |
| | 81 | |
| | 82 | /* split rc5 data block ... */ |
| | 83 | start = (buf[offset] >> 7) & 1; |
| | 84 | range = (buf[offset] >> 6) & 1; |
| | 85 | toggle = (buf[offset] >> 5) & 1; |
| | 86 | dev = buf[offset] & 0x1f; |
| | 87 | code = (buf[offset+1] >> 2) & 0x3f; |
| | 88 | |
| | 89 | /* rc5 has two start bits |
| | 90 | * the first bit must be one |
| | 91 | * the second bit defines the command range: |
| | 92 | * 1 = 0-63, 0 = 64 - 127 |
| | 93 | */ |
| | 94 | if (!start) |
| | 95 | /* no key pressed */ |
| | 96 | return 0; |
| | 97 | |
| | 98 | /* filter out invalid key presses */ |
| | 99 | ircode = (start << 12) | (toggle << 11) | (dev << 6) | code; |
| | 100 | if ((ircode & 0x1fff) == 0x1fff) |
| | 101 | return 0; |
| | 102 | |
| | 103 | if (!range) |
| | 104 | code += 64; |
| | 105 | |
| | 106 | dev_dbg(&ir->rc->dev, |
| | 107 | "ir hauppauge (rc5): s%d r%d t%d dev=%d code=%d\n", |
| | 108 | start, range, toggle, dev, code); |
| | 109 | |
| | 110 | *protocol = RC_PROTO_RC5; |
| | 111 | *scancode = RC_SCANCODE_RC5(dev, code); |
| | 112 | *ptoggle = toggle; |
| | 113 | |
| | 114 | return 1; |
| | 115 | } else if (size == 6 && (buf[0] & 0x40)) { |
| | 116 | code = buf[4]; |
| | 117 | dev = buf[3]; |
| | 118 | vendor = get_unaligned_be16(buf + 1); |
| | 119 | |
| | 120 | if (vendor == 0x800f) { |
| | 121 | *ptoggle = (dev & 0x80) != 0; |
| | 122 | *protocol = RC_PROTO_RC6_MCE; |
| | 123 | dev &= 0x7f; |
| | 124 | dev_dbg(&ir->rc->dev, |
| | 125 | "ir hauppauge (rc6-mce): t%d vendor=%d dev=%d code=%d\n", |
| | 126 | *ptoggle, vendor, dev, code); |
| | 127 | } else { |
| | 128 | *ptoggle = 0; |
| | 129 | *protocol = RC_PROTO_RC6_6A_32; |
| | 130 | dev_dbg(&ir->rc->dev, |
| | 131 | "ir hauppauge (rc6-6a-32): vendor=%d dev=%d code=%d\n", |
| | 132 | vendor, dev, code); |
| | 133 | } |
| | 134 | |
| | 135 | *scancode = RC_SCANCODE_RC6_6A(vendor, dev, code); |
| | 136 | |
| | 137 | return 1; |
| | 138 | } |
| | 139 | |
| | 140 | return 0; |
| | 141 | } |
| | 142 | |
| | 143 | static int get_key_haup(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 144 | u32 *scancode, u8 *toggle) |
| | 145 | { |
| | 146 | return get_key_haup_common(ir, protocol, scancode, toggle, 3); |
| | 147 | } |
| | 148 | |
| | 149 | static int get_key_haup_xvr(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 150 | u32 *scancode, u8 *toggle) |
| | 151 | { |
| | 152 | int ret; |
| | 153 | unsigned char buf[1] = { 0 }; |
| | 154 | |
| | 155 | /* |
| | 156 | * This is the same apparent "are you ready?" poll command observed |
| | 157 | * watching Windows driver traffic and implemented in lirc_zilog. With |
| | 158 | * this added, we get far saner remote behavior with z8 chips on usb |
| | 159 | * connected devices, even with the default polling interval of 100ms. |
| | 160 | */ |
| | 161 | ret = i2c_master_send(ir->c, buf, 1); |
| | 162 | if (ret != 1) |
| | 163 | return (ret < 0) ? ret : -EINVAL; |
| | 164 | |
| | 165 | return get_key_haup_common(ir, protocol, scancode, toggle, 6); |
| | 166 | } |
| | 167 | |
| | 168 | static int get_key_pixelview(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 169 | u32 *scancode, u8 *toggle) |
| | 170 | { |
| | 171 | unsigned char b; |
| | 172 | |
| | 173 | /* poll IR chip */ |
| | 174 | if (1 != i2c_master_recv(ir->c, &b, 1)) { |
| | 175 | dev_dbg(&ir->rc->dev, "read error\n"); |
| | 176 | return -EIO; |
| | 177 | } |
| | 178 | |
| | 179 | *protocol = RC_PROTO_OTHER; |
| | 180 | *scancode = b; |
| | 181 | *toggle = 0; |
| | 182 | return 1; |
| | 183 | } |
| | 184 | |
| | 185 | static int get_key_fusionhdtv(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 186 | u32 *scancode, u8 *toggle) |
| | 187 | { |
| | 188 | unsigned char buf[4]; |
| | 189 | |
| | 190 | /* poll IR chip */ |
| | 191 | if (4 != i2c_master_recv(ir->c, buf, 4)) { |
| | 192 | dev_dbg(&ir->rc->dev, "read error\n"); |
| | 193 | return -EIO; |
| | 194 | } |
| | 195 | |
| | 196 | if (buf[0] != 0 || buf[1] != 0 || buf[2] != 0 || buf[3] != 0) |
| | 197 | dev_dbg(&ir->rc->dev, "%s: %*ph\n", __func__, 4, buf); |
| | 198 | |
| | 199 | /* no key pressed or signal from other ir remote */ |
| | 200 | if(buf[0] != 0x1 || buf[1] != 0xfe) |
| | 201 | return 0; |
| | 202 | |
| | 203 | *protocol = RC_PROTO_UNKNOWN; |
| | 204 | *scancode = buf[2]; |
| | 205 | *toggle = 0; |
| | 206 | return 1; |
| | 207 | } |
| | 208 | |
| | 209 | static int get_key_knc1(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 210 | u32 *scancode, u8 *toggle) |
| | 211 | { |
| | 212 | unsigned char b; |
| | 213 | |
| | 214 | /* poll IR chip */ |
| | 215 | if (1 != i2c_master_recv(ir->c, &b, 1)) { |
| | 216 | dev_dbg(&ir->rc->dev, "read error\n"); |
| | 217 | return -EIO; |
| | 218 | } |
| | 219 | |
| | 220 | /* it seems that 0xFE indicates that a button is still hold |
| | 221 | down, while 0xff indicates that no button is hold |
| | 222 | down. 0xfe sequences are sometimes interrupted by 0xFF */ |
| | 223 | |
| | 224 | dev_dbg(&ir->rc->dev, "key %02x\n", b); |
| | 225 | |
| | 226 | if (b == 0xff) |
| | 227 | return 0; |
| | 228 | |
| | 229 | if (b == 0xfe) |
| | 230 | /* keep old data */ |
| | 231 | return 1; |
| | 232 | |
| | 233 | *protocol = RC_PROTO_UNKNOWN; |
| | 234 | *scancode = b; |
| | 235 | *toggle = 0; |
| | 236 | return 1; |
| | 237 | } |
| | 238 | |
| | 239 | static int get_key_avermedia_cardbus(struct IR_i2c *ir, enum rc_proto *protocol, |
| | 240 | u32 *scancode, u8 *toggle) |
| | 241 | { |
| | 242 | unsigned char subaddr, key, keygroup; |
| | 243 | struct i2c_msg msg[] = { { .addr = ir->c->addr, .flags = 0, |
| | 244 | .buf = &subaddr, .len = 1}, |
| | 245 | { .addr = ir->c->addr, .flags = I2C_M_RD, |
| | 246 | .buf = &key, .len = 1} }; |
| | 247 | subaddr = 0x0d; |
| | 248 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { |
| | 249 | dev_dbg(&ir->rc->dev, "read error\n"); |
| | 250 | return -EIO; |
| | 251 | } |
| | 252 | |
| | 253 | if (key == 0xff) |
| | 254 | return 0; |
| | 255 | |
| | 256 | subaddr = 0x0b; |
| | 257 | msg[1].buf = &keygroup; |
| | 258 | if (2 != i2c_transfer(ir->c->adapter, msg, 2)) { |
| | 259 | dev_dbg(&ir->rc->dev, "read error\n"); |
| | 260 | return -EIO; |
| | 261 | } |
| | 262 | |
| | 263 | if (keygroup == 0xff) |
| | 264 | return 0; |
| | 265 | |
| | 266 | dev_dbg(&ir->rc->dev, "read key 0x%02x/0x%02x\n", key, keygroup); |
| | 267 | if (keygroup < 2 || keygroup > 4) { |
| | 268 | dev_warn(&ir->rc->dev, "warning: invalid key group 0x%02x for key 0x%02x\n", |
| | 269 | keygroup, key); |
| | 270 | } |
| | 271 | key |= (keygroup & 1) << 6; |
| | 272 | |
| | 273 | *protocol = RC_PROTO_UNKNOWN; |
| | 274 | *scancode = key; |
| | 275 | if (ir->c->addr == 0x41) /* AVerMedia EM78P153 */ |
| | 276 | *scancode |= keygroup << 8; |
| | 277 | *toggle = 0; |
| | 278 | return 1; |
| | 279 | } |
| | 280 | |
| | 281 | /* ----------------------------------------------------------------------- */ |
| | 282 | |
| | 283 | static int ir_key_poll(struct IR_i2c *ir) |
| | 284 | { |
| | 285 | enum rc_proto protocol; |
| | 286 | u32 scancode; |
| | 287 | u8 toggle; |
| | 288 | int rc; |
| | 289 | |
| | 290 | dev_dbg(&ir->rc->dev, "%s\n", __func__); |
| | 291 | rc = ir->get_key(ir, &protocol, &scancode, &toggle); |
| | 292 | if (rc < 0) { |
| | 293 | dev_warn(&ir->rc->dev, "error %d\n", rc); |
| | 294 | return rc; |
| | 295 | } |
| | 296 | |
| | 297 | if (rc) { |
| | 298 | dev_dbg(&ir->rc->dev, "%s: proto = 0x%04x, scancode = 0x%08x\n", |
| | 299 | __func__, protocol, scancode); |
| | 300 | rc_keydown(ir->rc, protocol, scancode, toggle); |
| | 301 | } |
| | 302 | return 0; |
| | 303 | } |
| | 304 | |
| | 305 | static void ir_work(struct work_struct *work) |
| | 306 | { |
| | 307 | int rc; |
| | 308 | struct IR_i2c *ir = container_of(work, struct IR_i2c, work.work); |
| | 309 | |
| | 310 | /* |
| | 311 | * If the transmit code is holding the lock, skip polling for |
| | 312 | * IR, we'll get it to it next time round |
| | 313 | */ |
| | 314 | if (mutex_trylock(&ir->lock)) { |
| | 315 | rc = ir_key_poll(ir); |
| | 316 | mutex_unlock(&ir->lock); |
| | 317 | if (rc == -ENODEV) { |
| | 318 | rc_unregister_device(ir->rc); |
| | 319 | ir->rc = NULL; |
| | 320 | return; |
| | 321 | } |
| | 322 | } |
| | 323 | |
| | 324 | schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling_interval)); |
| | 325 | } |
| | 326 | |
| | 327 | static int ir_open(struct rc_dev *dev) |
| | 328 | { |
| | 329 | struct IR_i2c *ir = dev->priv; |
| | 330 | |
| | 331 | schedule_delayed_work(&ir->work, 0); |
| | 332 | |
| | 333 | return 0; |
| | 334 | } |
| | 335 | |
| | 336 | static void ir_close(struct rc_dev *dev) |
| | 337 | { |
| | 338 | struct IR_i2c *ir = dev->priv; |
| | 339 | |
| | 340 | cancel_delayed_work_sync(&ir->work); |
| | 341 | } |
| | 342 | |
| | 343 | /* Zilog Transmit Interface */ |
| | 344 | #define XTAL_FREQ 18432000 |
| | 345 | |
| | 346 | #define ZILOG_SEND 0x80 |
| | 347 | #define ZILOG_UIR_END 0x40 |
| | 348 | #define ZILOG_INIT_END 0x20 |
| | 349 | #define ZILOG_LIR_END 0x10 |
| | 350 | |
| | 351 | #define ZILOG_STATUS_OK 0x80 |
| | 352 | #define ZILOG_STATUS_TX 0x40 |
| | 353 | #define ZILOG_STATUS_SET 0x20 |
| | 354 | |
| | 355 | /* |
| | 356 | * As you can see here, very few different lengths of pulse and space |
| | 357 | * can be encoded. This means that the hardware does not work well with |
| | 358 | * recorded IR. It's best to work with generated IR, like from ir-ctl or |
| | 359 | * the in-kernel encoders. |
| | 360 | */ |
| | 361 | struct code_block { |
| | 362 | u8 length; |
| | 363 | u16 pulse[7]; /* not aligned */ |
| | 364 | u8 carrier_pulse; |
| | 365 | u8 carrier_space; |
| | 366 | u16 space[8]; /* not aligned */ |
| | 367 | u8 codes[61]; |
| | 368 | u8 csum[2]; |
| | 369 | } __packed; |
| | 370 | |
| | 371 | static int send_data_block(struct IR_i2c *ir, int cmd, |
| | 372 | struct code_block *code_block) |
| | 373 | { |
| | 374 | int i, j, ret; |
| | 375 | u8 buf[5], *p; |
| | 376 | |
| | 377 | p = &code_block->length; |
| | 378 | for (i = 0; p < code_block->csum; i++) |
| | 379 | code_block->csum[i & 1] ^= *p++; |
| | 380 | |
| | 381 | p = &code_block->length; |
| | 382 | |
| | 383 | for (i = 0; i < sizeof(*code_block);) { |
| | 384 | int tosend = sizeof(*code_block) - i; |
| | 385 | |
| | 386 | if (tosend > 4) |
| | 387 | tosend = 4; |
| | 388 | buf[0] = i + 1; |
| | 389 | for (j = 0; j < tosend; ++j) |
| | 390 | buf[1 + j] = p[i + j]; |
| | 391 | dev_dbg(&ir->rc->dev, "%*ph", tosend + 1, buf); |
| | 392 | ret = i2c_master_send(ir->tx_c, buf, tosend + 1); |
| | 393 | if (ret != tosend + 1) { |
| | 394 | dev_dbg(&ir->rc->dev, |
| | 395 | "i2c_master_send failed with %d\n", ret); |
| | 396 | return ret < 0 ? ret : -EIO; |
| | 397 | } |
| | 398 | i += tosend; |
| | 399 | } |
| | 400 | |
| | 401 | buf[0] = 0; |
| | 402 | buf[1] = cmd; |
| | 403 | ret = i2c_master_send(ir->tx_c, buf, 2); |
| | 404 | if (ret != 2) { |
| | 405 | dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); |
| | 406 | return ret < 0 ? ret : -EIO; |
| | 407 | } |
| | 408 | |
| | 409 | usleep_range(2000, 5000); |
| | 410 | |
| | 411 | ret = i2c_master_send(ir->tx_c, buf, 1); |
| | 412 | if (ret != 1) { |
| | 413 | dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); |
| | 414 | return ret < 0 ? ret : -EIO; |
| | 415 | } |
| | 416 | |
| | 417 | return 0; |
| | 418 | } |
| | 419 | |
| | 420 | static int zilog_init(struct IR_i2c *ir) |
| | 421 | { |
| | 422 | struct code_block code_block = { .length = sizeof(code_block) }; |
| | 423 | u8 buf[4]; |
| | 424 | int ret; |
| | 425 | |
| | 426 | put_unaligned_be16(0x1000, &code_block.pulse[3]); |
| | 427 | |
| | 428 | ret = send_data_block(ir, ZILOG_INIT_END, &code_block); |
| | 429 | if (ret) |
| | 430 | return ret; |
| | 431 | |
| | 432 | ret = i2c_master_recv(ir->tx_c, buf, 4); |
| | 433 | if (ret != 4) { |
| | 434 | dev_err(&ir->c->dev, "failed to retrieve firmware version: %d\n", |
| | 435 | ret); |
| | 436 | return ret < 0 ? ret : -EIO; |
| | 437 | } |
| | 438 | |
| | 439 | dev_info(&ir->c->dev, "Zilog/Hauppauge IR blaster firmware version %d.%d.%d\n", |
| | 440 | buf[1], buf[2], buf[3]); |
| | 441 | |
| | 442 | return 0; |
| | 443 | } |
| | 444 | |
| | 445 | /* |
| | 446 | * If the last slot for pulse is the same as the current slot for pulse, |
| | 447 | * then use slot no 7. |
| | 448 | */ |
| | 449 | static void copy_codes(u8 *dst, u8 *src, unsigned int count) |
| | 450 | { |
| | 451 | u8 c, last = 0xff; |
| | 452 | |
| | 453 | while (count--) { |
| | 454 | c = *src++; |
| | 455 | if ((c & 0xf0) == last) { |
| | 456 | *dst++ = 0x70 | (c & 0xf); |
| | 457 | } else { |
| | 458 | *dst++ = c; |
| | 459 | last = c & 0xf0; |
| | 460 | } |
| | 461 | } |
| | 462 | } |
| | 463 | |
| | 464 | /* |
| | 465 | * When looking for repeats, we don't care about the trailing space. This |
| | 466 | * is set to the shortest possible anyway. |
| | 467 | */ |
| | 468 | static int cmp_no_trail(u8 *a, u8 *b, unsigned int count) |
| | 469 | { |
| | 470 | while (--count) { |
| | 471 | if (*a++ != *b++) |
| | 472 | return 1; |
| | 473 | } |
| | 474 | |
| | 475 | return (*a & 0xf0) - (*b & 0xf0); |
| | 476 | } |
| | 477 | |
| | 478 | static int find_slot(u16 *array, unsigned int size, u16 val) |
| | 479 | { |
| | 480 | int i; |
| | 481 | |
| | 482 | for (i = 0; i < size; i++) { |
| | 483 | if (get_unaligned_be16(&array[i]) == val) { |
| | 484 | return i; |
| | 485 | } else if (!array[i]) { |
| | 486 | put_unaligned_be16(val, &array[i]); |
| | 487 | return i; |
| | 488 | } |
| | 489 | } |
| | 490 | |
| | 491 | return -1; |
| | 492 | } |
| | 493 | |
| | 494 | static int zilog_ir_format(struct rc_dev *rcdev, unsigned int *txbuf, |
| | 495 | unsigned int count, struct code_block *code_block) |
| | 496 | { |
| | 497 | struct IR_i2c *ir = rcdev->priv; |
| | 498 | int rep, i, l, p = 0, s, c = 0; |
| | 499 | bool repeating; |
| | 500 | u8 codes[174]; |
| | 501 | |
| | 502 | code_block->carrier_pulse = DIV_ROUND_CLOSEST( |
| | 503 | ir->duty_cycle * XTAL_FREQ / 1000, ir->carrier); |
| | 504 | code_block->carrier_space = DIV_ROUND_CLOSEST( |
| | 505 | (100 - ir->duty_cycle) * XTAL_FREQ / 1000, ir->carrier); |
| | 506 | |
| | 507 | for (i = 0; i < count; i++) { |
| | 508 | if (c >= ARRAY_SIZE(codes) - 1) { |
| | 509 | dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); |
| | 510 | return -EINVAL; |
| | 511 | } |
| | 512 | |
| | 513 | /* |
| | 514 | * Lengths more than 142220us cannot be encoded; also |
| | 515 | * this checks for multiply overflow |
| | 516 | */ |
| | 517 | if (txbuf[i] > 142220) |
| | 518 | return -EINVAL; |
| | 519 | |
| | 520 | l = DIV_ROUND_CLOSEST((XTAL_FREQ / 1000) * txbuf[i], 40000); |
| | 521 | |
| | 522 | if (i & 1) { |
| | 523 | s = find_slot(code_block->space, |
| | 524 | ARRAY_SIZE(code_block->space), l); |
| | 525 | if (s == -1) { |
| | 526 | dev_warn(&rcdev->dev, "Too many different lengths spaces, cannot transmit"); |
| | 527 | return -EINVAL; |
| | 528 | } |
| | 529 | |
| | 530 | /* We have a pulse and space */ |
| | 531 | codes[c++] = (p << 4) | s; |
| | 532 | } else { |
| | 533 | p = find_slot(code_block->pulse, |
| | 534 | ARRAY_SIZE(code_block->pulse), l); |
| | 535 | if (p == -1) { |
| | 536 | dev_warn(&rcdev->dev, "Too many different lengths pulses, cannot transmit"); |
| | 537 | return -EINVAL; |
| | 538 | } |
| | 539 | } |
| | 540 | } |
| | 541 | |
| | 542 | /* We have to encode the trailing pulse. Find the shortest space */ |
| | 543 | s = 0; |
| | 544 | for (i = 1; i < ARRAY_SIZE(code_block->space); i++) { |
| | 545 | u16 d = get_unaligned_be16(&code_block->space[i]); |
| | 546 | |
| | 547 | if (get_unaligned_be16(&code_block->space[s]) > d) |
| | 548 | s = i; |
| | 549 | } |
| | 550 | |
| | 551 | codes[c++] = (p << 4) | s; |
| | 552 | |
| | 553 | dev_dbg(&rcdev->dev, "generated %d codes\n", c); |
| | 554 | |
| | 555 | /* |
| | 556 | * Are the last N codes (so pulse + space) repeating 3 times? |
| | 557 | * if so we can shorten the codes list and use code 0xc0 to repeat |
| | 558 | * them. |
| | 559 | */ |
| | 560 | repeating = false; |
| | 561 | |
| | 562 | for (rep = c / 3; rep >= 1; rep--) { |
| | 563 | if (!memcmp(&codes[c - rep * 3], &codes[c - rep * 2], rep) && |
| | 564 | !cmp_no_trail(&codes[c - rep], &codes[c - rep * 2], rep)) { |
| | 565 | repeating = true; |
| | 566 | break; |
| | 567 | } |
| | 568 | } |
| | 569 | |
| | 570 | if (repeating) { |
| | 571 | /* first copy any leading non-repeating */ |
| | 572 | int leading = c - rep * 3; |
| | 573 | |
| | 574 | if (leading + rep >= ARRAY_SIZE(code_block->codes) - 3) { |
| | 575 | dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); |
| | 576 | return -EINVAL; |
| | 577 | } |
| | 578 | |
| | 579 | dev_dbg(&rcdev->dev, "found trailing %d repeat\n", rep); |
| | 580 | copy_codes(code_block->codes, codes, leading); |
| | 581 | code_block->codes[leading] = 0x82; |
| | 582 | copy_codes(code_block->codes + leading + 1, codes + leading, |
| | 583 | rep); |
| | 584 | c = leading + 1 + rep; |
| | 585 | code_block->codes[c++] = 0xc0; |
| | 586 | } else { |
| | 587 | if (c >= ARRAY_SIZE(code_block->codes) - 3) { |
| | 588 | dev_warn(&rcdev->dev, "IR too long, cannot transmit\n"); |
| | 589 | return -EINVAL; |
| | 590 | } |
| | 591 | |
| | 592 | dev_dbg(&rcdev->dev, "found no trailing repeat\n"); |
| | 593 | code_block->codes[0] = 0x82; |
| | 594 | copy_codes(code_block->codes + 1, codes, c); |
| | 595 | c++; |
| | 596 | code_block->codes[c++] = 0xc4; |
| | 597 | } |
| | 598 | |
| | 599 | while (c < ARRAY_SIZE(code_block->codes)) |
| | 600 | code_block->codes[c++] = 0x83; |
| | 601 | |
| | 602 | return 0; |
| | 603 | } |
| | 604 | |
| | 605 | static int zilog_tx(struct rc_dev *rcdev, unsigned int *txbuf, |
| | 606 | unsigned int count) |
| | 607 | { |
| | 608 | struct IR_i2c *ir = rcdev->priv; |
| | 609 | struct code_block code_block = { .length = sizeof(code_block) }; |
| | 610 | u8 buf[2]; |
| | 611 | int ret, i; |
| | 612 | |
| | 613 | ret = zilog_ir_format(rcdev, txbuf, count, &code_block); |
| | 614 | if (ret) |
| | 615 | return ret; |
| | 616 | |
| | 617 | ret = mutex_lock_interruptible(&ir->lock); |
| | 618 | if (ret) |
| | 619 | return ret; |
| | 620 | |
| | 621 | ret = send_data_block(ir, ZILOG_UIR_END, &code_block); |
| | 622 | if (ret) |
| | 623 | goto out_unlock; |
| | 624 | |
| | 625 | ret = i2c_master_recv(ir->tx_c, buf, 1); |
| | 626 | if (ret != 1) { |
| | 627 | dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); |
| | 628 | goto out_unlock; |
| | 629 | } |
| | 630 | |
| | 631 | dev_dbg(&ir->rc->dev, "code set status: %02x\n", buf[0]); |
| | 632 | |
| | 633 | if (buf[0] != (ZILOG_STATUS_OK | ZILOG_STATUS_SET)) { |
| | 634 | dev_err(&ir->rc->dev, "unexpected IR TX response %02x\n", |
| | 635 | buf[0]); |
| | 636 | ret = -EIO; |
| | 637 | goto out_unlock; |
| | 638 | } |
| | 639 | |
| | 640 | buf[0] = 0x00; |
| | 641 | buf[1] = ZILOG_SEND; |
| | 642 | |
| | 643 | ret = i2c_master_send(ir->tx_c, buf, 2); |
| | 644 | if (ret != 2) { |
| | 645 | dev_err(&ir->rc->dev, "i2c_master_send failed with %d\n", ret); |
| | 646 | if (ret >= 0) |
| | 647 | ret = -EIO; |
| | 648 | goto out_unlock; |
| | 649 | } |
| | 650 | |
| | 651 | dev_dbg(&ir->rc->dev, "send command sent\n"); |
| | 652 | |
| | 653 | /* |
| | 654 | * This bit NAKs until the device is ready, so we retry it |
| | 655 | * sleeping a bit each time. This seems to be what the windows |
| | 656 | * driver does, approximately. |
| | 657 | * Try for up to 1s. |
| | 658 | */ |
| | 659 | for (i = 0; i < 20; ++i) { |
| | 660 | set_current_state(TASK_UNINTERRUPTIBLE); |
| | 661 | schedule_timeout(msecs_to_jiffies(50)); |
| | 662 | ret = i2c_master_send(ir->tx_c, buf, 1); |
| | 663 | if (ret == 1) |
| | 664 | break; |
| | 665 | dev_dbg(&ir->rc->dev, |
| | 666 | "NAK expected: i2c_master_send failed with %d (try %d)\n", |
| | 667 | ret, i + 1); |
| | 668 | } |
| | 669 | |
| | 670 | if (ret != 1) { |
| | 671 | dev_err(&ir->rc->dev, |
| | 672 | "IR TX chip never got ready: last i2c_master_send failed with %d\n", |
| | 673 | ret); |
| | 674 | if (ret >= 0) |
| | 675 | ret = -EIO; |
| | 676 | goto out_unlock; |
| | 677 | } |
| | 678 | |
| | 679 | i = i2c_master_recv(ir->tx_c, buf, 1); |
| | 680 | if (i != 1) { |
| | 681 | dev_err(&ir->rc->dev, "i2c_master_recv failed with %d\n", ret); |
| | 682 | ret = -EIO; |
| | 683 | goto out_unlock; |
| | 684 | } else if (buf[0] != ZILOG_STATUS_OK) { |
| | 685 | dev_err(&ir->rc->dev, "unexpected IR TX response #2: %02x\n", |
| | 686 | buf[0]); |
| | 687 | ret = -EIO; |
| | 688 | goto out_unlock; |
| | 689 | } |
| | 690 | dev_dbg(&ir->rc->dev, "transmit complete\n"); |
| | 691 | |
| | 692 | /* Oh good, it worked */ |
| | 693 | ret = count; |
| | 694 | out_unlock: |
| | 695 | mutex_unlock(&ir->lock); |
| | 696 | |
| | 697 | return ret; |
| | 698 | } |
| | 699 | |
| | 700 | static int zilog_tx_carrier(struct rc_dev *dev, u32 carrier) |
| | 701 | { |
| | 702 | struct IR_i2c *ir = dev->priv; |
| | 703 | |
| | 704 | if (carrier > 500000 || carrier < 20000) |
| | 705 | return -EINVAL; |
| | 706 | |
| | 707 | ir->carrier = carrier; |
| | 708 | |
| | 709 | return 0; |
| | 710 | } |
| | 711 | |
| | 712 | static int zilog_tx_duty_cycle(struct rc_dev *dev, u32 duty_cycle) |
| | 713 | { |
| | 714 | struct IR_i2c *ir = dev->priv; |
| | 715 | |
| | 716 | ir->duty_cycle = duty_cycle; |
| | 717 | |
| | 718 | return 0; |
| | 719 | } |
| | 720 | |
| | 721 | static int ir_probe(struct i2c_client *client, const struct i2c_device_id *id) |
| | 722 | { |
| | 723 | char *ir_codes = NULL; |
| | 724 | const char *name = NULL; |
| | 725 | u64 rc_proto = RC_PROTO_BIT_UNKNOWN; |
| | 726 | struct IR_i2c *ir; |
| | 727 | struct rc_dev *rc = NULL; |
| | 728 | struct i2c_adapter *adap = client->adapter; |
| | 729 | unsigned short addr = client->addr; |
| | 730 | int err; |
| | 731 | |
| | 732 | if ((id->driver_data & FLAG_HDPVR) && !enable_hdpvr) { |
| | 733 | dev_err(&client->dev, "IR for HDPVR is known to cause problems during recording, use enable_hdpvr modparam to enable\n"); |
| | 734 | return -ENODEV; |
| | 735 | } |
| | 736 | |
| | 737 | ir = devm_kzalloc(&client->dev, sizeof(*ir), GFP_KERNEL); |
| | 738 | if (!ir) |
| | 739 | return -ENOMEM; |
| | 740 | |
| | 741 | ir->c = client; |
| | 742 | ir->polling_interval = DEFAULT_POLLING_INTERVAL; |
| | 743 | i2c_set_clientdata(client, ir); |
| | 744 | |
| | 745 | switch(addr) { |
| | 746 | case 0x64: |
| | 747 | name = "Pixelview"; |
| | 748 | ir->get_key = get_key_pixelview; |
| | 749 | rc_proto = RC_PROTO_BIT_OTHER; |
| | 750 | ir_codes = RC_MAP_EMPTY; |
| | 751 | break; |
| | 752 | case 0x18: |
| | 753 | case 0x1f: |
| | 754 | case 0x1a: |
| | 755 | name = "Hauppauge"; |
| | 756 | ir->get_key = get_key_haup; |
| | 757 | rc_proto = RC_PROTO_BIT_RC5; |
| | 758 | ir_codes = RC_MAP_HAUPPAUGE; |
| | 759 | break; |
| | 760 | case 0x30: |
| | 761 | name = "KNC One"; |
| | 762 | ir->get_key = get_key_knc1; |
| | 763 | rc_proto = RC_PROTO_BIT_OTHER; |
| | 764 | ir_codes = RC_MAP_EMPTY; |
| | 765 | break; |
| | 766 | case 0x6b: |
| | 767 | name = "FusionHDTV"; |
| | 768 | ir->get_key = get_key_fusionhdtv; |
| | 769 | rc_proto = RC_PROTO_BIT_UNKNOWN; |
| | 770 | ir_codes = RC_MAP_FUSIONHDTV_MCE; |
| | 771 | break; |
| | 772 | case 0x40: |
| | 773 | name = "AVerMedia Cardbus remote"; |
| | 774 | ir->get_key = get_key_avermedia_cardbus; |
| | 775 | rc_proto = RC_PROTO_BIT_OTHER; |
| | 776 | ir_codes = RC_MAP_AVERMEDIA_CARDBUS; |
| | 777 | break; |
| | 778 | case 0x41: |
| | 779 | name = "AVerMedia EM78P153"; |
| | 780 | ir->get_key = get_key_avermedia_cardbus; |
| | 781 | rc_proto = RC_PROTO_BIT_OTHER; |
| | 782 | /* RM-KV remote, seems to be same as RM-K6 */ |
| | 783 | ir_codes = RC_MAP_AVERMEDIA_M733A_RM_K6; |
| | 784 | break; |
| | 785 | case 0x71: |
| | 786 | name = "Hauppauge/Zilog Z8"; |
| | 787 | ir->get_key = get_key_haup_xvr; |
| | 788 | rc_proto = RC_PROTO_BIT_RC5 | RC_PROTO_BIT_RC6_MCE | |
| | 789 | RC_PROTO_BIT_RC6_6A_32; |
| | 790 | ir_codes = RC_MAP_HAUPPAUGE; |
| | 791 | break; |
| | 792 | } |
| | 793 | |
| | 794 | /* Let the caller override settings */ |
| | 795 | if (client->dev.platform_data) { |
| | 796 | const struct IR_i2c_init_data *init_data = |
| | 797 | client->dev.platform_data; |
| | 798 | |
| | 799 | ir_codes = init_data->ir_codes; |
| | 800 | rc = init_data->rc_dev; |
| | 801 | |
| | 802 | name = init_data->name; |
| | 803 | if (init_data->type) |
| | 804 | rc_proto = init_data->type; |
| | 805 | |
| | 806 | if (init_data->polling_interval) |
| | 807 | ir->polling_interval = init_data->polling_interval; |
| | 808 | |
| | 809 | switch (init_data->internal_get_key_func) { |
| | 810 | case IR_KBD_GET_KEY_CUSTOM: |
| | 811 | /* The bridge driver provided us its own function */ |
| | 812 | ir->get_key = init_data->get_key; |
| | 813 | break; |
| | 814 | case IR_KBD_GET_KEY_PIXELVIEW: |
| | 815 | ir->get_key = get_key_pixelview; |
| | 816 | break; |
| | 817 | case IR_KBD_GET_KEY_HAUP: |
| | 818 | ir->get_key = get_key_haup; |
| | 819 | break; |
| | 820 | case IR_KBD_GET_KEY_KNC1: |
| | 821 | ir->get_key = get_key_knc1; |
| | 822 | break; |
| | 823 | case IR_KBD_GET_KEY_FUSIONHDTV: |
| | 824 | ir->get_key = get_key_fusionhdtv; |
| | 825 | break; |
| | 826 | case IR_KBD_GET_KEY_HAUP_XVR: |
| | 827 | ir->get_key = get_key_haup_xvr; |
| | 828 | break; |
| | 829 | case IR_KBD_GET_KEY_AVERMEDIA_CARDBUS: |
| | 830 | ir->get_key = get_key_avermedia_cardbus; |
| | 831 | break; |
| | 832 | } |
| | 833 | } |
| | 834 | |
| | 835 | if (!rc) { |
| | 836 | /* |
| | 837 | * If platform_data doesn't specify rc_dev, initialize it |
| | 838 | * internally |
| | 839 | */ |
| | 840 | rc = rc_allocate_device(RC_DRIVER_SCANCODE); |
| | 841 | if (!rc) |
| | 842 | return -ENOMEM; |
| | 843 | } |
| | 844 | ir->rc = rc; |
| | 845 | |
| | 846 | /* Make sure we are all setup before going on */ |
| | 847 | if (!name || !ir->get_key || !rc_proto || !ir_codes) { |
| | 848 | dev_warn(&client->dev, "Unsupported device at address 0x%02x\n", |
| | 849 | addr); |
| | 850 | err = -ENODEV; |
| | 851 | goto err_out_free; |
| | 852 | } |
| | 853 | |
| | 854 | ir->ir_codes = ir_codes; |
| | 855 | |
| | 856 | snprintf(ir->phys, sizeof(ir->phys), "%s/%s", dev_name(&adap->dev), |
| | 857 | dev_name(&client->dev)); |
| | 858 | |
| | 859 | /* |
| | 860 | * Initialize input_dev fields |
| | 861 | * It doesn't make sense to allow overriding them via platform_data |
| | 862 | */ |
| | 863 | rc->input_id.bustype = BUS_I2C; |
| | 864 | rc->input_phys = ir->phys; |
| | 865 | rc->device_name = name; |
| | 866 | rc->dev.parent = &client->dev; |
| | 867 | rc->priv = ir; |
| | 868 | rc->open = ir_open; |
| | 869 | rc->close = ir_close; |
| | 870 | |
| | 871 | /* |
| | 872 | * Initialize the other fields of rc_dev |
| | 873 | */ |
| | 874 | rc->map_name = ir->ir_codes; |
| | 875 | rc->allowed_protocols = rc_proto; |
| | 876 | if (!rc->driver_name) |
| | 877 | rc->driver_name = KBUILD_MODNAME; |
| | 878 | |
| | 879 | mutex_init(&ir->lock); |
| | 880 | |
| | 881 | INIT_DELAYED_WORK(&ir->work, ir_work); |
| | 882 | |
| | 883 | if (id->driver_data & FLAG_TX) { |
| | 884 | ir->tx_c = i2c_new_dummy(client->adapter, 0x70); |
| | 885 | if (!ir->tx_c) { |
| | 886 | dev_err(&client->dev, "failed to setup tx i2c address"); |
| | 887 | } else if (!zilog_init(ir)) { |
| | 888 | ir->carrier = 38000; |
| | 889 | ir->duty_cycle = 40; |
| | 890 | rc->tx_ir = zilog_tx; |
| | 891 | rc->s_tx_carrier = zilog_tx_carrier; |
| | 892 | rc->s_tx_duty_cycle = zilog_tx_duty_cycle; |
| | 893 | } |
| | 894 | } |
| | 895 | |
| | 896 | err = rc_register_device(rc); |
| | 897 | if (err) |
| | 898 | goto err_out_free; |
| | 899 | |
| | 900 | return 0; |
| | 901 | |
| | 902 | err_out_free: |
| | 903 | if (ir->tx_c) |
| | 904 | i2c_unregister_device(ir->tx_c); |
| | 905 | |
| | 906 | /* Only frees rc if it were allocated internally */ |
| | 907 | rc_free_device(rc); |
| | 908 | return err; |
| | 909 | } |
| | 910 | |
| | 911 | static int ir_remove(struct i2c_client *client) |
| | 912 | { |
| | 913 | struct IR_i2c *ir = i2c_get_clientdata(client); |
| | 914 | |
| | 915 | /* kill outstanding polls */ |
| | 916 | cancel_delayed_work_sync(&ir->work); |
| | 917 | |
| | 918 | if (ir->tx_c) |
| | 919 | i2c_unregister_device(ir->tx_c); |
| | 920 | |
| | 921 | /* unregister device */ |
| | 922 | rc_unregister_device(ir->rc); |
| | 923 | |
| | 924 | /* free memory */ |
| | 925 | return 0; |
| | 926 | } |
| | 927 | |
| | 928 | static const struct i2c_device_id ir_kbd_id[] = { |
| | 929 | /* Generic entry for any IR receiver */ |
| | 930 | { "ir_video", 0 }, |
| | 931 | /* IR device specific entries should be added here */ |
| | 932 | { "ir_z8f0811_haup", FLAG_TX }, |
| | 933 | { "ir_z8f0811_hdpvr", FLAG_TX | FLAG_HDPVR }, |
| | 934 | { } |
| | 935 | }; |
| | 936 | MODULE_DEVICE_TABLE(i2c, ir_kbd_id); |
| | 937 | |
| | 938 | static struct i2c_driver ir_kbd_driver = { |
| | 939 | .driver = { |
| | 940 | .name = "ir-kbd-i2c", |
| | 941 | }, |
| | 942 | .probe = ir_probe, |
| | 943 | .remove = ir_remove, |
| | 944 | .id_table = ir_kbd_id, |
| | 945 | }; |
| | 946 | |
| | 947 | module_i2c_driver(ir_kbd_driver); |
| | 948 | |
| | 949 | /* ----------------------------------------------------------------------- */ |
| | 950 | |
| | 951 | MODULE_AUTHOR("Gerd Knorr, Michal Kochanowicz, Christoph Bartelmus, Ulrich Mueller"); |
| | 952 | MODULE_DESCRIPTION("input driver for i2c IR remote controls"); |
| | 953 | MODULE_LICENSE("GPL"); |
projects / linux-2.6-block.git / blame_incremental