Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 1 | /* |
| 2 | * Remote control driver for the TV-card based on bt829 |
| 3 | * |
| 4 | * by Leonid Froenchenko <lfroen@galileo.co.il> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 21 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 22 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 23 | #include <linux/kernel.h> |
| 24 | #include <linux/module.h> |
| 25 | #include <linux/threads.h> |
| 26 | #include <linux/sched.h> |
| 27 | #include <linux/ioport.h> |
| 28 | #include <linux/pci.h> |
| 29 | #include <linux/delay.h> |
| 30 | |
| 31 | #include <media/lirc_dev.h> |
| 32 | |
| 33 | static int poll_main(void); |
| 34 | static int atir_init_start(void); |
| 35 | |
| 36 | static void write_index(unsigned char index, unsigned int value); |
| 37 | static unsigned int read_index(unsigned char index); |
| 38 | |
| 39 | static void do_i2c_start(void); |
| 40 | static void do_i2c_stop(void); |
| 41 | |
| 42 | static void seems_wr_byte(unsigned char al); |
| 43 | static unsigned char seems_rd_byte(void); |
| 44 | |
| 45 | static unsigned int read_index(unsigned char al); |
| 46 | static void write_index(unsigned char ah, unsigned int edx); |
| 47 | |
| 48 | static void cycle_delay(int cycle); |
| 49 | |
| 50 | static void do_set_bits(unsigned char bl); |
| 51 | static unsigned char do_get_bits(void); |
| 52 | |
| 53 | #define DATA_PCI_OFF 0x7FFC00 |
| 54 | #define WAIT_CYCLE 20 |
| 55 | |
| 56 | #define DRIVER_NAME "lirc_bt829" |
| 57 | |
Rusty Russell | 90ab5ee | 2012-01-13 09:32:20 +1030 | [diff] [blame] | 58 | static bool debug; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 59 | |
| 60 | static int atir_minor; |
Ben Hutchings | d06d3ea | 2013-09-04 22:31:15 -0300 | [diff] [blame] | 61 | static phys_addr_t pci_addr_phys; |
Tuomas Tynkkynen | 12a7208 | 2014-05-08 14:13:17 +0300 | [diff] [blame] | 62 | static unsigned char __iomem *pci_addr_lin; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 63 | |
| 64 | static struct lirc_driver atir_driver; |
| 65 | |
| 66 | static struct pci_dev *do_pci_probe(void) |
| 67 | { |
| 68 | struct pci_dev *my_dev; |
Gulsah Kose | a17ec4c | 2014-09-21 01:06:55 +0300 | [diff] [blame] | 69 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 70 | my_dev = pci_get_device(PCI_VENDOR_ID_ATI, |
| 71 | PCI_DEVICE_ID_ATI_264VT, NULL); |
| 72 | if (my_dev) { |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 73 | pr_err("Using device: %s\n", pci_name(my_dev)); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 74 | pci_addr_phys = 0; |
| 75 | if (my_dev->resource[0].flags & IORESOURCE_MEM) { |
| 76 | pci_addr_phys = my_dev->resource[0].start; |
Ben Hutchings | d06d3ea | 2013-09-04 22:31:15 -0300 | [diff] [blame] | 77 | pr_info("memory at %pa\n", &pci_addr_phys); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 78 | } |
| 79 | if (pci_addr_phys == 0) { |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 80 | pr_err("no memory resource ?\n"); |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 81 | pci_dev_put(my_dev); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 82 | return NULL; |
| 83 | } |
| 84 | } else { |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 85 | pr_err("pci_probe failed\n"); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 86 | return NULL; |
| 87 | } |
| 88 | return my_dev; |
| 89 | } |
| 90 | |
| 91 | static int atir_add_to_buf(void *data, struct lirc_buffer *buf) |
| 92 | { |
| 93 | unsigned char key; |
| 94 | int status; |
Gulsah Kose | a17ec4c | 2014-09-21 01:06:55 +0300 | [diff] [blame] | 95 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 96 | status = poll_main(); |
| 97 | key = (status >> 8) & 0xFF; |
| 98 | if (status & 0xFF) { |
Aya Mahfouz | 72f3f59 | 2014-10-26 19:35:20 +0200 | [diff] [blame] | 99 | dev_dbg(atir_driver.dev, "reading key %02X\n", key); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 100 | lirc_buffer_write(buf, &key); |
| 101 | return 0; |
| 102 | } |
| 103 | return -ENODATA; |
| 104 | } |
| 105 | |
| 106 | static int atir_set_use_inc(void *data) |
| 107 | { |
Aya Mahfouz | 72f3f59 | 2014-10-26 19:35:20 +0200 | [diff] [blame] | 108 | dev_dbg(atir_driver.dev, "driver is opened\n"); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 109 | return 0; |
| 110 | } |
| 111 | |
| 112 | static void atir_set_use_dec(void *data) |
| 113 | { |
Aya Mahfouz | 72f3f59 | 2014-10-26 19:35:20 +0200 | [diff] [blame] | 114 | dev_dbg(atir_driver.dev, "driver is closed\n"); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | int init_module(void) |
| 118 | { |
| 119 | struct pci_dev *pdev; |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 120 | int rc; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 121 | |
| 122 | pdev = do_pci_probe(); |
| 123 | if (pdev == NULL) |
Dave Jones | 66240a6 | 2011-07-11 11:24:36 -0400 | [diff] [blame] | 124 | return -ENODEV; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 125 | |
Ben Hutchings | cfe1b7a | 2013-09-04 22:32:19 -0300 | [diff] [blame] | 126 | rc = pci_enable_device(pdev); |
| 127 | if (rc) |
| 128 | goto err_put_dev; |
| 129 | |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 130 | if (!atir_init_start()) { |
| 131 | rc = -ENODEV; |
Ben Hutchings | cfe1b7a | 2013-09-04 22:32:19 -0300 | [diff] [blame] | 132 | goto err_disable; |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 133 | } |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 134 | |
| 135 | strcpy(atir_driver.name, "ATIR"); |
| 136 | atir_driver.minor = -1; |
| 137 | atir_driver.code_length = 8; |
| 138 | atir_driver.sample_rate = 10; |
Sachin Kamat | 440ca3f | 2013-10-09 15:58:29 +0530 | [diff] [blame] | 139 | atir_driver.data = NULL; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 140 | atir_driver.add_to_buf = atir_add_to_buf; |
| 141 | atir_driver.set_use_inc = atir_set_use_inc; |
| 142 | atir_driver.set_use_dec = atir_set_use_dec; |
| 143 | atir_driver.dev = &pdev->dev; |
| 144 | atir_driver.owner = THIS_MODULE; |
| 145 | |
| 146 | atir_minor = lirc_register_driver(&atir_driver); |
| 147 | if (atir_minor < 0) { |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 148 | pr_err("failed to register driver!\n"); |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 149 | rc = atir_minor; |
| 150 | goto err_unmap; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 151 | } |
Aya Mahfouz | 72f3f59 | 2014-10-26 19:35:20 +0200 | [diff] [blame] | 152 | dev_dbg(atir_driver.dev, "driver is registered on minor %d\n", |
| 153 | atir_minor); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 154 | |
| 155 | return 0; |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 156 | |
| 157 | err_unmap: |
| 158 | iounmap(pci_addr_lin); |
Ben Hutchings | cfe1b7a | 2013-09-04 22:32:19 -0300 | [diff] [blame] | 159 | err_disable: |
| 160 | pci_disable_device(pdev); |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 161 | err_put_dev: |
| 162 | pci_dev_put(pdev); |
| 163 | return rc; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 164 | } |
| 165 | |
| 166 | |
| 167 | void cleanup_module(void) |
| 168 | { |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 169 | struct pci_dev *pdev = to_pci_dev(atir_driver.dev); |
| 170 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 171 | lirc_unregister_driver(atir_minor); |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 172 | iounmap(pci_addr_lin); |
Ben Hutchings | cfe1b7a | 2013-09-04 22:32:19 -0300 | [diff] [blame] | 173 | pci_disable_device(pdev); |
Ben Hutchings | fd39abe | 2013-09-04 22:31:59 -0300 | [diff] [blame] | 174 | pci_dev_put(pdev); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | |
| 178 | static int atir_init_start(void) |
| 179 | { |
| 180 | pci_addr_lin = ioremap(pci_addr_phys + DATA_PCI_OFF, 0x400); |
Sachin Kamat | 440ca3f | 2013-10-09 15:58:29 +0530 | [diff] [blame] | 181 | if (!pci_addr_lin) { |
YAMANE Toshiaki | f8a7df0 | 2012-11-08 15:54:09 -0300 | [diff] [blame] | 182 | pr_info("pci mem must be mapped\n"); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 183 | return 0; |
| 184 | } |
| 185 | return 1; |
| 186 | } |
| 187 | |
| 188 | static void cycle_delay(int cycle) |
| 189 | { |
| 190 | udelay(WAIT_CYCLE*cycle); |
| 191 | } |
| 192 | |
| 193 | |
Emil Goode | cadc792 | 2012-07-07 14:53:25 -0300 | [diff] [blame] | 194 | static int poll_main(void) |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 195 | { |
| 196 | unsigned char status_high, status_low; |
| 197 | |
| 198 | do_i2c_start(); |
| 199 | |
| 200 | seems_wr_byte(0xAA); |
| 201 | seems_wr_byte(0x01); |
| 202 | |
| 203 | do_i2c_start(); |
| 204 | |
| 205 | seems_wr_byte(0xAB); |
| 206 | |
| 207 | status_low = seems_rd_byte(); |
| 208 | status_high = seems_rd_byte(); |
| 209 | |
| 210 | do_i2c_stop(); |
| 211 | |
| 212 | return (status_high << 8) | status_low; |
| 213 | } |
| 214 | |
| 215 | static void do_i2c_start(void) |
| 216 | { |
| 217 | do_set_bits(3); |
| 218 | cycle_delay(4); |
| 219 | |
| 220 | do_set_bits(1); |
| 221 | cycle_delay(7); |
| 222 | |
| 223 | do_set_bits(0); |
| 224 | cycle_delay(2); |
| 225 | } |
| 226 | |
| 227 | static void do_i2c_stop(void) |
| 228 | { |
| 229 | unsigned char bits; |
Gulsah Kose | a17ec4c | 2014-09-21 01:06:55 +0300 | [diff] [blame] | 230 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 231 | bits = do_get_bits() & 0xFD; |
| 232 | do_set_bits(bits); |
| 233 | cycle_delay(1); |
| 234 | |
| 235 | bits |= 1; |
| 236 | do_set_bits(bits); |
| 237 | cycle_delay(2); |
| 238 | |
| 239 | bits |= 2; |
| 240 | do_set_bits(bits); |
| 241 | bits = 3; |
| 242 | do_set_bits(bits); |
| 243 | cycle_delay(2); |
| 244 | } |
| 245 | |
| 246 | static void seems_wr_byte(unsigned char value) |
| 247 | { |
| 248 | int i; |
| 249 | unsigned char reg; |
| 250 | |
| 251 | reg = do_get_bits(); |
| 252 | for (i = 0; i < 8; i++) { |
| 253 | if (value & 0x80) |
| 254 | reg |= 0x02; |
| 255 | else |
| 256 | reg &= 0xFD; |
| 257 | |
| 258 | do_set_bits(reg); |
| 259 | cycle_delay(1); |
| 260 | |
| 261 | reg |= 1; |
| 262 | do_set_bits(reg); |
| 263 | cycle_delay(1); |
| 264 | |
| 265 | reg &= 0xFE; |
| 266 | do_set_bits(reg); |
| 267 | cycle_delay(1); |
| 268 | value <<= 1; |
| 269 | } |
| 270 | cycle_delay(2); |
| 271 | |
| 272 | reg |= 2; |
| 273 | do_set_bits(reg); |
| 274 | |
| 275 | reg |= 1; |
| 276 | do_set_bits(reg); |
| 277 | |
| 278 | cycle_delay(1); |
| 279 | do_get_bits(); |
| 280 | |
| 281 | reg &= 0xFE; |
| 282 | do_set_bits(reg); |
| 283 | cycle_delay(3); |
| 284 | } |
| 285 | |
| 286 | static unsigned char seems_rd_byte(void) |
| 287 | { |
| 288 | int i; |
| 289 | int rd_byte; |
| 290 | unsigned char bits_2, bits_1; |
| 291 | |
| 292 | bits_1 = do_get_bits() | 2; |
| 293 | do_set_bits(bits_1); |
| 294 | |
| 295 | rd_byte = 0; |
| 296 | for (i = 0; i < 8; i++) { |
| 297 | bits_1 &= 0xFE; |
| 298 | do_set_bits(bits_1); |
| 299 | cycle_delay(2); |
| 300 | |
| 301 | bits_1 |= 1; |
| 302 | do_set_bits(bits_1); |
| 303 | cycle_delay(1); |
| 304 | |
| 305 | bits_2 = do_get_bits(); |
| 306 | if (bits_2 & 2) |
| 307 | rd_byte |= 1; |
| 308 | |
| 309 | rd_byte <<= 1; |
| 310 | } |
| 311 | |
| 312 | bits_1 = 0; |
| 313 | if (bits_2 == 0) |
| 314 | bits_1 |= 2; |
| 315 | |
| 316 | do_set_bits(bits_1); |
| 317 | cycle_delay(2); |
| 318 | |
| 319 | bits_1 |= 1; |
| 320 | do_set_bits(bits_1); |
| 321 | cycle_delay(3); |
| 322 | |
| 323 | bits_1 &= 0xFE; |
| 324 | do_set_bits(bits_1); |
| 325 | cycle_delay(2); |
| 326 | |
| 327 | rd_byte >>= 1; |
| 328 | rd_byte &= 0xFF; |
| 329 | return rd_byte; |
| 330 | } |
| 331 | |
| 332 | static void do_set_bits(unsigned char new_bits) |
| 333 | { |
| 334 | int reg_val; |
Gulsah Kose | a17ec4c | 2014-09-21 01:06:55 +0300 | [diff] [blame] | 335 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 336 | reg_val = read_index(0x34); |
| 337 | if (new_bits & 2) { |
| 338 | reg_val &= 0xFFFFFFDF; |
| 339 | reg_val |= 1; |
| 340 | } else { |
| 341 | reg_val &= 0xFFFFFFFE; |
| 342 | reg_val |= 0x20; |
| 343 | } |
| 344 | reg_val |= 0x10; |
| 345 | write_index(0x34, reg_val); |
| 346 | |
| 347 | reg_val = read_index(0x31); |
| 348 | if (new_bits & 1) |
| 349 | reg_val |= 0x1000000; |
| 350 | else |
| 351 | reg_val &= 0xFEFFFFFF; |
| 352 | |
| 353 | reg_val |= 0x8000000; |
| 354 | write_index(0x31, reg_val); |
| 355 | } |
| 356 | |
| 357 | static unsigned char do_get_bits(void) |
| 358 | { |
| 359 | unsigned char bits; |
| 360 | int reg_val; |
| 361 | |
| 362 | reg_val = read_index(0x34); |
| 363 | reg_val |= 0x10; |
| 364 | reg_val &= 0xFFFFFFDF; |
| 365 | write_index(0x34, reg_val); |
| 366 | |
| 367 | reg_val = read_index(0x34); |
| 368 | bits = 0; |
| 369 | if (reg_val & 8) |
| 370 | bits |= 2; |
| 371 | else |
| 372 | bits &= 0xFD; |
| 373 | |
| 374 | reg_val = read_index(0x31); |
| 375 | if (reg_val & 0x1000000) |
| 376 | bits |= 1; |
| 377 | else |
| 378 | bits &= 0xFE; |
| 379 | |
| 380 | return bits; |
| 381 | } |
| 382 | |
| 383 | static unsigned int read_index(unsigned char index) |
| 384 | { |
Tuomas Tynkkynen | 12a7208 | 2014-05-08 14:13:17 +0300 | [diff] [blame] | 385 | unsigned char __iomem *addr; |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 386 | /* addr = pci_addr_lin + DATA_PCI_OFF + ((index & 0xFF) << 2); */ |
| 387 | addr = pci_addr_lin + ((index & 0xFF) << 2); |
Mahati Chamarthy | a579c97 | 2014-09-23 21:24:47 +0530 | [diff] [blame] | 388 | return readl(addr); |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 389 | } |
| 390 | |
| 391 | static void write_index(unsigned char index, unsigned int reg_val) |
| 392 | { |
Tuomas Tynkkynen | 12a7208 | 2014-05-08 14:13:17 +0300 | [diff] [blame] | 393 | unsigned char __iomem *addr; |
Gulsah Kose | a17ec4c | 2014-09-21 01:06:55 +0300 | [diff] [blame] | 394 | |
Jarod Wilson | d10d634 | 2010-07-26 20:26:53 -0300 | [diff] [blame] | 395 | addr = pci_addr_lin + ((index & 0xFF) << 2); |
| 396 | writel(reg_val, addr); |
| 397 | } |
| 398 | |
| 399 | MODULE_AUTHOR("Froenchenko Leonid"); |
| 400 | MODULE_DESCRIPTION("IR remote driver for bt829 based TV cards"); |
| 401 | MODULE_LICENSE("GPL"); |
| 402 | |
| 403 | module_param(debug, bool, S_IRUGO | S_IWUSR); |
| 404 | MODULE_PARM_DESC(debug, "Debug enabled or not"); |