Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 1 | #include <linux/module.h> |
| 2 | #include <linux/init.h> |
| 3 | #include <linux/kernel.h> |
| 4 | #include <linux/fs.h> |
| 5 | #include <linux/slab.h> |
| 6 | #include <linux/types.h> |
| 7 | #include <linux/cdev.h> |
| 8 | #include <asm/uaccess.h> |
| 9 | #include <linux/device.h> |
| 10 | #include <linux/spi/spi.h> |
| 11 | |
| 12 | #include "linux_wlan_common.h" |
| 13 | |
| 14 | #define USE_SPI_DMA 0 /* johnny add */ |
| 15 | |
| 16 | #ifdef WILC_ASIC_A0 |
| 17 | #if defined(PLAT_PANDA_ES_OMAP4460) |
| 18 | #define MIN_SPEED 12000000 |
| 19 | #define MAX_SPEED 24000000 |
| 20 | #elif defined(PLAT_WMS8304) |
| 21 | #define MIN_SPEED 12000000 |
| 22 | #define MAX_SPEED 24000000 /* 4000000 */ |
| 23 | #elif defined(CUSTOMER_PLATFORM) |
| 24 | /* |
| 25 | TODO : define Clock speed under 48M. |
| 26 | * |
| 27 | * ex) |
| 28 | * #define MIN_SPEED 24000000 |
| 29 | * #define MAX_SPEED 48000000 |
| 30 | */ |
| 31 | #else |
| 32 | #define MIN_SPEED 24000000 |
| 33 | #define MAX_SPEED 48000000 |
| 34 | #endif |
| 35 | #else /* WILC_ASIC_A0 */ |
| 36 | /* Limit clk to 6MHz on FPGA. */ |
| 37 | #define MIN_SPEED 6000000 |
| 38 | #define MAX_SPEED 6000000 |
| 39 | #endif /* WILC_ASIC_A0 */ |
| 40 | |
| 41 | static uint32_t SPEED = MIN_SPEED; |
| 42 | |
| 43 | struct spi_device *wilc_spi_dev; |
| 44 | void linux_spi_deinit(void *vp); |
| 45 | |
| 46 | static int __init wilc_bus_probe(struct spi_device *spi) |
| 47 | { |
| 48 | |
| 49 | PRINT_D(BUS_DBG, "spiModalias: %s\n", spi->modalias); |
| 50 | PRINT_D(BUS_DBG, "spiMax-Speed: %d\n", spi->max_speed_hz); |
| 51 | wilc_spi_dev = spi; |
| 52 | |
| 53 | printk("Driver Initializing success\n"); |
| 54 | return 0; |
| 55 | } |
| 56 | |
| 57 | static int __exit wilc_bus_remove(struct spi_device *spi) |
| 58 | { |
| 59 | |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 60 | return 0; |
| 61 | } |
| 62 | |
| 63 | #ifdef CONFIG_OF |
| 64 | static const struct of_device_id wilc1000_of_match[] = { |
| 65 | { .compatible = "atmel,wilc_spi", }, |
| 66 | {} |
| 67 | }; |
| 68 | MODULE_DEVICE_TABLE(of, wilc1000_of_match); |
| 69 | #endif |
| 70 | |
| 71 | struct spi_driver wilc_bus __refdata = { |
| 72 | .driver = { |
| 73 | .name = MODALIAS, |
| 74 | #ifdef CONFIG_OF |
| 75 | .of_match_table = wilc1000_of_match, |
| 76 | #endif |
| 77 | }, |
| 78 | .probe = wilc_bus_probe, |
| 79 | .remove = __exit_p(wilc_bus_remove), |
| 80 | }; |
| 81 | |
| 82 | |
| 83 | void linux_spi_deinit(void *vp) |
| 84 | { |
| 85 | |
| 86 | spi_unregister_driver(&wilc_bus); |
| 87 | |
| 88 | SPEED = MIN_SPEED; |
| 89 | PRINT_ER("@@@@@@@@@@@@ restore SPI speed to %d @@@@@@@@@\n", SPEED); |
| 90 | |
| 91 | } |
| 92 | |
| 93 | |
| 94 | |
| 95 | int linux_spi_init(void *vp) |
| 96 | { |
| 97 | int ret = 1; |
| 98 | static int called; |
| 99 | |
| 100 | |
| 101 | if (called == 0) { |
| 102 | called++; |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 103 | ret = spi_register_driver(&wilc_bus); |
| 104 | } |
| 105 | |
| 106 | /* change return value to match WILC interface */ |
| 107 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 108 | |
| 109 | return ret; |
| 110 | } |
| 111 | |
| 112 | #if defined(PLAT_WMS8304) |
| 113 | #define TXRX_PHASE_SIZE (4096) |
| 114 | #endif |
| 115 | |
| 116 | #if defined (NM73131_0_BOARD) |
| 117 | |
| 118 | int linux_spi_write(uint8_t *b, uint32_t len) |
| 119 | { |
| 120 | |
| 121 | int ret; |
| 122 | |
| 123 | if (len > 0 && b != NULL) { |
| 124 | struct spi_message msg; |
| 125 | PRINT_D(BUS_DBG, "Request writing %d bytes\n", len); |
| 126 | struct spi_transfer tr = { |
| 127 | .tx_buf = b, |
| 128 | .len = len, |
| 129 | .speed_hz = SPEED, |
| 130 | .delay_usecs = 0, |
| 131 | }; |
| 132 | |
| 133 | spi_message_init(&msg); |
| 134 | spi_message_add_tail(&tr, &msg); |
| 135 | ret = spi_sync(wilc_spi_dev, &msg); |
| 136 | if (ret < 0) { |
| 137 | PRINT_ER("SPI transaction failed\n"); |
| 138 | } |
| 139 | |
| 140 | } else { |
| 141 | PRINT_ER("can't write data with the following length: %d\n", len); |
| 142 | PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); |
| 143 | ret = -1; |
| 144 | } |
| 145 | |
| 146 | /* change return value to match WILC interface */ |
| 147 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 148 | |
| 149 | |
| 150 | return ret; |
| 151 | } |
| 152 | |
| 153 | #elif defined(TXRX_PHASE_SIZE) |
| 154 | |
| 155 | int linux_spi_write(uint8_t *b, uint32_t len) |
| 156 | { |
| 157 | int ret; |
| 158 | if (len > 0 && b != NULL) { |
| 159 | int i = 0; |
| 160 | int blk = len / TXRX_PHASE_SIZE; |
| 161 | int remainder = len % TXRX_PHASE_SIZE; |
| 162 | |
Hari Prasath Gujulan Elango | 37bc15d | 2015-06-02 12:48:05 +0000 | [diff] [blame] | 163 | char *r_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 164 | if (!r_buffer) { |
| 165 | PRINT_ER("Failed to allocate memory for r_buffer\n"); |
| 166 | } |
| 167 | |
| 168 | if (blk) { |
| 169 | while (i < blk) { |
| 170 | struct spi_message msg; |
| 171 | struct spi_transfer tr = { |
| 172 | .tx_buf = b + (i * TXRX_PHASE_SIZE), |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 173 | .len = TXRX_PHASE_SIZE, |
| 174 | .speed_hz = SPEED, |
| 175 | .bits_per_word = 8, |
| 176 | .delay_usecs = 0, |
| 177 | }; |
Hari Prasath Gujulan Elango | 4d77c6c | 2015-06-02 12:49:12 +0000 | [diff] [blame] | 178 | |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 179 | tr.rx_buf = r_buffer; |
| 180 | |
| 181 | memset(&msg, 0, sizeof(msg)); |
| 182 | spi_message_init(&msg); |
| 183 | msg.spi = wilc_spi_dev; |
| 184 | msg.is_dma_mapped = USE_SPI_DMA; |
| 185 | |
| 186 | spi_message_add_tail(&tr, &msg); |
| 187 | ret = spi_sync(wilc_spi_dev, &msg); |
| 188 | if (ret < 0) { |
| 189 | PRINT_ER("SPI transaction failed\n"); |
| 190 | } |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 191 | i++; |
| 192 | |
| 193 | } |
| 194 | } |
| 195 | if (remainder) { |
| 196 | struct spi_message msg; |
| 197 | struct spi_transfer tr = { |
| 198 | .tx_buf = b + (blk * TXRX_PHASE_SIZE), |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 199 | .len = remainder, |
| 200 | .speed_hz = SPEED, |
| 201 | .bits_per_word = 8, |
| 202 | .delay_usecs = 0, |
| 203 | }; |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 204 | tr.rx_buf = r_buffer; |
| 205 | |
| 206 | memset(&msg, 0, sizeof(msg)); |
| 207 | spi_message_init(&msg); |
| 208 | msg.spi = wilc_spi_dev; |
| 209 | msg.is_dma_mapped = USE_SPI_DMA; /* rachel */ |
| 210 | |
| 211 | spi_message_add_tail(&tr, &msg); |
| 212 | ret = spi_sync(wilc_spi_dev, &msg); |
| 213 | if (ret < 0) { |
| 214 | PRINT_ER("SPI transaction failed\n"); |
| 215 | } |
| 216 | } |
Abdul Hussain | 0256b54 | 2015-06-18 12:37:00 +0000 | [diff] [blame] | 217 | kfree(r_buffer); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 218 | } else { |
| 219 | PRINT_ER("can't write data with the following length: %d\n", len); |
| 220 | PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); |
| 221 | ret = -1; |
| 222 | } |
| 223 | |
| 224 | /* change return value to match WILC interface */ |
| 225 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 226 | |
| 227 | return ret; |
| 228 | |
| 229 | } |
| 230 | |
| 231 | #else |
| 232 | int linux_spi_write(uint8_t *b, uint32_t len) |
| 233 | { |
| 234 | |
| 235 | int ret; |
| 236 | struct spi_message msg; |
| 237 | |
| 238 | if (len > 0 && b != NULL) { |
| 239 | struct spi_transfer tr = { |
| 240 | .tx_buf = b, |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 241 | .len = len, |
| 242 | .speed_hz = SPEED, |
| 243 | .delay_usecs = 0, |
| 244 | }; |
Hari Prasath Gujulan Elango | 37bc15d | 2015-06-02 12:48:05 +0000 | [diff] [blame] | 245 | char *r_buffer = kzalloc(len, GFP_KERNEL); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 246 | if (!r_buffer) { |
| 247 | PRINT_ER("Failed to allocate memory for r_buffer\n"); |
| 248 | } |
| 249 | tr.rx_buf = r_buffer; |
| 250 | PRINT_D(BUS_DBG, "Request writing %d bytes\n", len); |
| 251 | |
| 252 | memset(&msg, 0, sizeof(msg)); |
| 253 | spi_message_init(&msg); |
| 254 | /* [[johnny add */ |
| 255 | msg.spi = wilc_spi_dev; |
| 256 | msg.is_dma_mapped = USE_SPI_DMA; |
| 257 | /* ]] */ |
| 258 | spi_message_add_tail(&tr, &msg); |
| 259 | |
| 260 | ret = spi_sync(wilc_spi_dev, &msg); |
| 261 | if (ret < 0) { |
| 262 | PRINT_ER("SPI transaction failed\n"); |
| 263 | } |
| 264 | |
| 265 | kfree(r_buffer); |
| 266 | } else { |
| 267 | PRINT_ER("can't write data with the following length: %d\n", len); |
| 268 | PRINT_ER("FAILED due to NULL buffer or ZERO length check the following length: %d\n", len); |
| 269 | ret = -1; |
| 270 | } |
| 271 | |
| 272 | /* change return value to match WILC interface */ |
| 273 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 274 | |
| 275 | |
| 276 | return ret; |
| 277 | } |
| 278 | |
| 279 | #endif |
| 280 | |
| 281 | #if defined (NM73131_0_BOARD) |
| 282 | |
| 283 | int linux_spi_read(unsigned char *rb, unsigned long rlen) |
| 284 | { |
| 285 | |
| 286 | int ret; |
| 287 | |
| 288 | if (rlen > 0) { |
| 289 | struct spi_message msg; |
| 290 | struct spi_transfer tr = { |
| 291 | .rx_buf = rb, |
| 292 | .len = rlen, |
| 293 | .speed_hz = SPEED, |
| 294 | .delay_usecs = 0, |
| 295 | |
| 296 | }; |
| 297 | |
| 298 | spi_message_init(&msg); |
| 299 | spi_message_add_tail(&tr, &msg); |
| 300 | ret = spi_sync(wilc_spi_dev, &msg); |
| 301 | if (ret < 0) { |
| 302 | PRINT_ER("SPI transaction failed\n"); |
| 303 | } |
| 304 | } else { |
| 305 | PRINT_ER("can't read data with the following length: %ld\n", rlen); |
| 306 | ret = -1; |
| 307 | } |
| 308 | /* change return value to match WILC interface */ |
| 309 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 310 | |
| 311 | return ret; |
| 312 | } |
| 313 | |
| 314 | #elif defined(TXRX_PHASE_SIZE) |
| 315 | |
| 316 | int linux_spi_read(unsigned char *rb, unsigned long rlen) |
| 317 | { |
| 318 | int ret; |
| 319 | |
| 320 | if (rlen > 0) { |
| 321 | int i = 0; |
| 322 | |
| 323 | int blk = rlen / TXRX_PHASE_SIZE; |
| 324 | int remainder = rlen % TXRX_PHASE_SIZE; |
| 325 | |
Hari Prasath Gujulan Elango | 37bc15d | 2015-06-02 12:48:05 +0000 | [diff] [blame] | 326 | char *t_buffer = kzalloc(TXRX_PHASE_SIZE, GFP_KERNEL); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 327 | if (!t_buffer) { |
| 328 | PRINT_ER("Failed to allocate memory for t_buffer\n"); |
| 329 | } |
| 330 | |
| 331 | if (blk) { |
| 332 | while (i < blk) { |
| 333 | struct spi_message msg; |
| 334 | struct spi_transfer tr = { |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 335 | .rx_buf = rb + (i * TXRX_PHASE_SIZE), |
| 336 | .len = TXRX_PHASE_SIZE, |
| 337 | .speed_hz = SPEED, |
| 338 | .bits_per_word = 8, |
| 339 | .delay_usecs = 0, |
| 340 | }; |
| 341 | tr.tx_buf = t_buffer; |
| 342 | |
| 343 | memset(&msg, 0, sizeof(msg)); |
| 344 | spi_message_init(&msg); |
| 345 | msg.spi = wilc_spi_dev; |
| 346 | msg.is_dma_mapped = USE_SPI_DMA; |
| 347 | |
| 348 | spi_message_add_tail(&tr, &msg); |
| 349 | ret = spi_sync(wilc_spi_dev, &msg); |
| 350 | if (ret < 0) { |
| 351 | PRINT_ER("SPI transaction failed\n"); |
| 352 | } |
| 353 | i++; |
| 354 | } |
| 355 | } |
| 356 | if (remainder) { |
| 357 | struct spi_message msg; |
| 358 | struct spi_transfer tr = { |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 359 | .rx_buf = rb + (blk * TXRX_PHASE_SIZE), |
| 360 | .len = remainder, |
| 361 | .speed_hz = SPEED, |
| 362 | .bits_per_word = 8, |
| 363 | .delay_usecs = 0, |
| 364 | }; |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 365 | tr.tx_buf = t_buffer; |
| 366 | |
| 367 | memset(&msg, 0, sizeof(msg)); |
| 368 | spi_message_init(&msg); |
| 369 | msg.spi = wilc_spi_dev; |
| 370 | msg.is_dma_mapped = USE_SPI_DMA; /* rachel */ |
| 371 | |
| 372 | spi_message_add_tail(&tr, &msg); |
| 373 | ret = spi_sync(wilc_spi_dev, &msg); |
| 374 | if (ret < 0) { |
| 375 | PRINT_ER("SPI transaction failed\n"); |
| 376 | } |
| 377 | } |
| 378 | |
Abdul Hussain | 0256b54 | 2015-06-18 12:37:00 +0000 | [diff] [blame] | 379 | kfree(t_buffer); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 380 | } else { |
| 381 | PRINT_ER("can't read data with the following length: %ld\n", rlen); |
| 382 | ret = -1; |
| 383 | } |
| 384 | /* change return value to match WILC interface */ |
| 385 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 386 | |
| 387 | return ret; |
| 388 | } |
| 389 | |
| 390 | #else |
| 391 | int linux_spi_read(unsigned char *rb, unsigned long rlen) |
| 392 | { |
| 393 | |
| 394 | int ret; |
| 395 | |
| 396 | if (rlen > 0) { |
| 397 | struct spi_message msg; |
| 398 | struct spi_transfer tr = { |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 399 | .rx_buf = rb, |
| 400 | .len = rlen, |
| 401 | .speed_hz = SPEED, |
| 402 | .delay_usecs = 0, |
| 403 | |
| 404 | }; |
Hari Prasath Gujulan Elango | 37bc15d | 2015-06-02 12:48:05 +0000 | [diff] [blame] | 405 | char *t_buffer = kzalloc(rlen, GFP_KERNEL); |
Johnny Kim | c5c77ba | 2015-05-11 14:30:56 +0900 | [diff] [blame] | 406 | if (!t_buffer) { |
| 407 | PRINT_ER("Failed to allocate memory for t_buffer\n"); |
| 408 | } |
| 409 | tr.tx_buf = t_buffer; |
| 410 | |
| 411 | memset(&msg, 0, sizeof(msg)); |
| 412 | spi_message_init(&msg); |
| 413 | /* [[ johnny add */ |
| 414 | msg.spi = wilc_spi_dev; |
| 415 | msg.is_dma_mapped = USE_SPI_DMA; |
| 416 | /* ]] */ |
| 417 | spi_message_add_tail(&tr, &msg); |
| 418 | |
| 419 | ret = spi_sync(wilc_spi_dev, &msg); |
| 420 | if (ret < 0) { |
| 421 | PRINT_ER("SPI transaction failed\n"); |
| 422 | } |
| 423 | kfree(t_buffer); |
| 424 | } else { |
| 425 | PRINT_ER("can't read data with the following length: %ld\n", rlen); |
| 426 | ret = -1; |
| 427 | } |
| 428 | /* change return value to match WILC interface */ |
| 429 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 430 | |
| 431 | return ret; |
| 432 | } |
| 433 | |
| 434 | #endif |
| 435 | |
| 436 | int linux_spi_write_read(unsigned char *wb, unsigned char *rb, unsigned int rlen) |
| 437 | { |
| 438 | |
| 439 | int ret; |
| 440 | |
| 441 | if (rlen > 0) { |
| 442 | struct spi_message msg; |
| 443 | struct spi_transfer tr = { |
| 444 | .rx_buf = rb, |
| 445 | .tx_buf = wb, |
| 446 | .len = rlen, |
| 447 | .speed_hz = SPEED, |
| 448 | .bits_per_word = 8, |
| 449 | .delay_usecs = 0, |
| 450 | |
| 451 | }; |
| 452 | |
| 453 | memset(&msg, 0, sizeof(msg)); |
| 454 | spi_message_init(&msg); |
| 455 | msg.spi = wilc_spi_dev; |
| 456 | msg.is_dma_mapped = USE_SPI_DMA; |
| 457 | |
| 458 | spi_message_add_tail(&tr, &msg); |
| 459 | ret = spi_sync(wilc_spi_dev, &msg); |
| 460 | if (ret < 0) { |
| 461 | PRINT_ER("SPI transaction failed\n"); |
| 462 | } |
| 463 | } else { |
| 464 | PRINT_ER("can't read data with the following length: %d\n", rlen); |
| 465 | ret = -1; |
| 466 | } |
| 467 | /* change return value to match WILC interface */ |
| 468 | (ret < 0) ? (ret = 0) : (ret = 1); |
| 469 | |
| 470 | return ret; |
| 471 | } |
| 472 | |
| 473 | int linux_spi_set_max_speed(void) |
| 474 | { |
| 475 | SPEED = MAX_SPEED; |
| 476 | |
| 477 | PRINT_INFO(BUS_DBG, "@@@@@@@@@@@@ change SPI speed to %d @@@@@@@@@\n", SPEED); |
| 478 | return 1; |
| 479 | } |