1 /* 2 * Analog Devices ADF7242 Low-Power IEEE 802.15.4 Transceiver 3 * 4 * Copyright 2009-2015 Analog Devices Inc. 5 * 6 * Licensed under the GPL-2 or later. 7 * 8 * http://www.analog.com/ADF7242 9 */ 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/interrupt.h> 14 #include <linux/delay.h> 15 #include <linux/mutex.h> 16 #include <linux/workqueue.h> 17 #include <linux/spinlock.h> 18 #include <linux/firmware.h> 19 #include <linux/spi/spi.h> 20 #include <linux/skbuff.h> 21 #include <linux/of.h> 22 #include <linux/irq.h> 23 #include <linux/delay.h> 24 #include <linux/debugfs.h> 25 #include <linux/bitops.h> 26 #include <linux/ieee802154.h> 27 #include <net/mac802154.h> 28 #include <net/cfg802154.h> 29 30 #define FIRMWARE "adf7242_firmware.bin" 31 #define MAX_POLL_LOOPS 200 32 33 /* All Registers */ 34 35 #define REG_EXT_CTRL 0x100 /* RW External LNA/PA and internal PA control */ 36 #define REG_TX_FSK_TEST 0x101 /* RW TX FSK test mode configuration */ 37 #define REG_CCA1 0x105 /* RW RSSI threshold for CCA */ 38 #define REG_CCA2 0x106 /* RW CCA mode configuration */ 39 #define REG_BUFFERCFG 0x107 /* RW RX_BUFFER overwrite control */ 40 #define REG_PKT_CFG 0x108 /* RW FCS evaluation configuration */ 41 #define REG_DELAYCFG0 0x109 /* RW RC_RX command to SFD or sync word delay */ 42 #define REG_DELAYCFG1 0x10A /* RW RC_TX command to TX state */ 43 #define REG_DELAYCFG2 0x10B /* RW Mac delay extension */ 44 #define REG_SYNC_WORD0 0x10C /* RW sync word bits [7:0] of [23:0] */ 45 #define REG_SYNC_WORD1 0x10D /* RW sync word bits [15:8] of [23:0] */ 46 #define REG_SYNC_WORD2 0x10E /* RW sync word bits [23:16] of [23:0] */ 47 #define REG_SYNC_CONFIG 0x10F /* RW sync word configuration */ 48 #define REG_RC_CFG 0x13E /* RW RX / TX packet configuration */ 49 #define REG_RC_VAR44 0x13F /* RW RESERVED */ 50 #define REG_CH_FREQ0 0x300 /* RW Channel Frequency Settings - Low */ 51 #define REG_CH_FREQ1 0x301 /* RW Channel Frequency Settings - Middle */ 52 #define REG_CH_FREQ2 0x302 /* RW Channel Frequency Settings - High */ 53 #define REG_TX_FD 0x304 /* RW TX Frequency Deviation Register */ 54 #define REG_DM_CFG0 0x305 /* RW RX Discriminator BW Register */ 55 #define REG_TX_M 0x306 /* RW TX Mode Register */ 56 #define REG_RX_M 0x307 /* RW RX Mode Register */ 57 #define REG_RRB 0x30C /* R RSSI Readback Register */ 58 #define REG_LRB 0x30D /* R Link Quality Readback Register */ 59 #define REG_DR0 0x30E /* RW bits [15:8] of [15:0] data rate setting */ 60 #define REG_DR1 0x30F /* RW bits [7:0] of [15:0] data rate setting */ 61 #define REG_PRAMPG 0x313 /* RW RESERVED */ 62 #define REG_TXPB 0x314 /* RW TX Packet Storage Base Address */ 63 #define REG_RXPB 0x315 /* RW RX Packet Storage Base Address */ 64 #define REG_TMR_CFG0 0x316 /* RW Wake up Timer Conf Register - High */ 65 #define REG_TMR_CFG1 0x317 /* RW Wake up Timer Conf Register - Low */ 66 #define REG_TMR_RLD0 0x318 /* RW Wake up Timer Value Register - High */ 67 #define REG_TMR_RLD1 0x319 /* RW Wake up Timer Value Register - Low */ 68 #define REG_TMR_CTRL 0x31A /* RW Wake up Timer Timeout flag */ 69 #define REG_PD_AUX 0x31E /* RW Battmon enable */ 70 #define REG_GP_CFG 0x32C /* RW GPIO Configuration */ 71 #define REG_GP_OUT 0x32D /* RW GPIO Configuration */ 72 #define REG_GP_IN 0x32E /* R GPIO Configuration */ 73 #define REG_SYNT 0x335 /* RW bandwidth calibration timers */ 74 #define REG_CAL_CFG 0x33D /* RW Calibration Settings */ 75 #define REG_PA_BIAS 0x36E /* RW PA BIAS */ 76 #define REG_SYNT_CAL 0x371 /* RW Oscillator and Doubler Configuration */ 77 #define REG_IIRF_CFG 0x389 /* RW BB Filter Decimation Rate */ 78 #define REG_CDR_CFG 0x38A /* RW CDR kVCO */ 79 #define REG_DM_CFG1 0x38B /* RW Postdemodulator Filter */ 80 #define REG_AGCSTAT 0x38E /* R RXBB Ref Osc Calibration Engine Readback */ 81 #define REG_RXCAL0 0x395 /* RW RX BB filter tuning, LSB */ 82 #define REG_RXCAL1 0x396 /* RW RX BB filter tuning, MSB */ 83 #define REG_RXFE_CFG 0x39B /* RW RXBB Ref Osc & RXFE Calibration */ 84 #define REG_PA_RR 0x3A7 /* RW Set PA ramp rate */ 85 #define REG_PA_CFG 0x3A8 /* RW PA enable */ 86 #define REG_EXTPA_CFG 0x3A9 /* RW External PA BIAS DAC */ 87 #define REG_EXTPA_MSC 0x3AA /* RW PA Bias Mode */ 88 #define REG_ADC_RBK 0x3AE /* R Readback temp */ 89 #define REG_AGC_CFG1 0x3B2 /* RW GC Parameters */ 90 #define REG_AGC_MAX 0x3B4 /* RW Slew rate */ 91 #define REG_AGC_CFG2 0x3B6 /* RW RSSI Parameters */ 92 #define REG_AGC_CFG3 0x3B7 /* RW RSSI Parameters */ 93 #define REG_AGC_CFG4 0x3B8 /* RW RSSI Parameters */ 94 #define REG_AGC_CFG5 0x3B9 /* RW RSSI & NDEC Parameters */ 95 #define REG_AGC_CFG6 0x3BA /* RW NDEC Parameters */ 96 #define REG_OCL_CFG1 0x3C4 /* RW OCL System Parameters */ 97 #define REG_IRQ1_EN0 0x3C7 /* RW Interrupt Mask set bits for IRQ1 */ 98 #define REG_IRQ1_EN1 0x3C8 /* RW Interrupt Mask set bits for IRQ1 */ 99 #define REG_IRQ2_EN0 0x3C9 /* RW Interrupt Mask set bits for IRQ2 */ 100 #define REG_IRQ2_EN1 0x3CA /* RW Interrupt Mask set bits for IRQ2 */ 101 #define REG_IRQ1_SRC0 0x3CB /* RW Interrupt Source bits for IRQ */ 102 #define REG_IRQ1_SRC1 0x3CC /* RW Interrupt Source bits for IRQ */ 103 #define REG_OCL_BW0 0x3D2 /* RW OCL System Parameters */ 104 #define REG_OCL_BW1 0x3D3 /* RW OCL System Parameters */ 105 #define REG_OCL_BW2 0x3D4 /* RW OCL System Parameters */ 106 #define REG_OCL_BW3 0x3D5 /* RW OCL System Parameters */ 107 #define REG_OCL_BW4 0x3D6 /* RW OCL System Parameters */ 108 #define REG_OCL_BWS 0x3D7 /* RW OCL System Parameters */ 109 #define REG_OCL_CFG13 0x3E0 /* RW OCL System Parameters */ 110 #define REG_GP_DRV 0x3E3 /* RW I/O pads Configuration and bg trim */ 111 #define REG_BM_CFG 0x3E6 /* RW Batt. Monitor Threshold Voltage setting */ 112 #define REG_SFD_15_4 0x3F4 /* RW Option to set non standard SFD */ 113 #define REG_AFC_CFG 0x3F7 /* RW AFC mode and polarity */ 114 #define REG_AFC_KI_KP 0x3F8 /* RW AFC ki and kp */ 115 #define REG_AFC_RANGE 0x3F9 /* RW AFC range */ 116 #define REG_AFC_READ 0x3FA /* RW Readback frequency error */ 117 118 /* REG_EXTPA_MSC */ 119 #define PA_PWR(x) (((x) & 0xF) << 4) 120 #define EXTPA_BIAS_SRC BIT(3) 121 #define EXTPA_BIAS_MODE(x) (((x) & 0x7) << 0) 122 123 /* REG_PA_CFG */ 124 #define PA_BRIDGE_DBIAS(x) (((x) & 0x1F) << 0) 125 #define PA_DBIAS_HIGH_POWER 21 126 #define PA_DBIAS_LOW_POWER 13 127 128 /* REG_PA_BIAS */ 129 #define PA_BIAS_CTRL(x) (((x) & 0x1F) << 1) 130 #define REG_PA_BIAS_DFL BIT(0) 131 #define PA_BIAS_HIGH_POWER 63 132 #define PA_BIAS_LOW_POWER 55 133 134 #define REG_PAN_ID0 0x112 135 #define REG_PAN_ID1 0x113 136 #define REG_SHORT_ADDR_0 0x114 137 #define REG_SHORT_ADDR_1 0x115 138 #define REG_IEEE_ADDR_0 0x116 139 #define REG_IEEE_ADDR_1 0x117 140 #define REG_IEEE_ADDR_2 0x118 141 #define REG_IEEE_ADDR_3 0x119 142 #define REG_IEEE_ADDR_4 0x11A 143 #define REG_IEEE_ADDR_5 0x11B 144 #define REG_IEEE_ADDR_6 0x11C 145 #define REG_IEEE_ADDR_7 0x11D 146 #define REG_FFILT_CFG 0x11E 147 #define REG_AUTO_CFG 0x11F 148 #define REG_AUTO_TX1 0x120 149 #define REG_AUTO_TX2 0x121 150 #define REG_AUTO_STATUS 0x122 151 152 /* REG_FFILT_CFG */ 153 #define ACCEPT_BEACON_FRAMES BIT(0) 154 #define ACCEPT_DATA_FRAMES BIT(1) 155 #define ACCEPT_ACK_FRAMES BIT(2) 156 #define ACCEPT_MACCMD_FRAMES BIT(3) 157 #define ACCEPT_RESERVED_FRAMES BIT(4) 158 #define ACCEPT_ALL_ADDRESS BIT(5) 159 160 /* REG_AUTO_CFG */ 161 #define AUTO_ACK_FRAMEPEND BIT(0) 162 #define IS_PANCOORD BIT(1) 163 #define RX_AUTO_ACK_EN BIT(3) 164 #define CSMA_CA_RX_TURNAROUND BIT(4) 165 166 /* REG_AUTO_TX1 */ 167 #define MAX_FRAME_RETRIES(x) ((x) & 0xF) 168 #define MAX_CCA_RETRIES(x) (((x) & 0x7) << 4) 169 170 /* REG_AUTO_TX2 */ 171 #define CSMA_MAX_BE(x) ((x) & 0xF) 172 #define CSMA_MIN_BE(x) (((x) & 0xF) << 4) 173 174 #define CMD_SPI_NOP 0xFF /* No operation. Use for dummy writes */ 175 #define CMD_SPI_PKT_WR 0x10 /* Write telegram to the Packet RAM 176 * starting from the TX packet base address 177 * pointer tx_packet_base 178 */ 179 #define CMD_SPI_PKT_RD 0x30 /* Read telegram from the Packet RAM 180 * starting from RX packet base address 181 * pointer rxpb.rx_packet_base 182 */ 183 #define CMD_SPI_MEM_WR(x) (0x18 + (x >> 8)) /* Write data to MCR or 184 * Packet RAM sequentially 185 */ 186 #define CMD_SPI_MEM_RD(x) (0x38 + (x >> 8)) /* Read data from MCR or 187 * Packet RAM sequentially 188 */ 189 #define CMD_SPI_MEMR_WR(x) (0x08 + (x >> 8)) /* Write data to MCR or Packet 190 * RAM as random block 191 */ 192 #define CMD_SPI_MEMR_RD(x) (0x28 + (x >> 8)) /* Read data from MCR or 193 * Packet RAM random block 194 */ 195 #define CMD_SPI_PRAM_WR 0x1E /* Write data sequentially to current 196 * PRAM page selected 197 */ 198 #define CMD_SPI_PRAM_RD 0x3E /* Read data sequentially from current 199 * PRAM page selected 200 */ 201 #define CMD_RC_SLEEP 0xB1 /* Invoke transition of radio controller 202 * into SLEEP state 203 */ 204 #define CMD_RC_IDLE 0xB2 /* Invoke transition of radio controller 205 * into IDLE state 206 */ 207 #define CMD_RC_PHY_RDY 0xB3 /* Invoke transition of radio controller 208 * into PHY_RDY state 209 */ 210 #define CMD_RC_RX 0xB4 /* Invoke transition of radio controller 211 * into RX state 212 */ 213 #define CMD_RC_TX 0xB5 /* Invoke transition of radio controller 214 * into TX state 215 */ 216 #define CMD_RC_MEAS 0xB6 /* Invoke transition of radio controller 217 * into MEAS state 218 */ 219 #define CMD_RC_CCA 0xB7 /* Invoke Clear channel assessment */ 220 #define CMD_RC_CSMACA 0xC1 /* initiates CSMA-CA channel access 221 * sequence and frame transmission 222 */ 223 #define CMD_RC_PC_RESET 0xC7 /* Program counter reset */ 224 #define CMD_RC_RESET 0xC8 /* Resets the ADF7242 and puts it in 225 * the sleep state 226 */ 227 #define CMD_RC_PC_RESET_NO_WAIT (CMD_RC_PC_RESET | BIT(31)) 228 229 /* STATUS */ 230 231 #define STAT_SPI_READY BIT(7) 232 #define STAT_IRQ_STATUS BIT(6) 233 #define STAT_RC_READY BIT(5) 234 #define STAT_CCA_RESULT BIT(4) 235 #define RC_STATUS_IDLE 1 236 #define RC_STATUS_MEAS 2 237 #define RC_STATUS_PHY_RDY 3 238 #define RC_STATUS_RX 4 239 #define RC_STATUS_TX 5 240 #define RC_STATUS_MASK 0xF 241 242 /* AUTO_STATUS */ 243 244 #define SUCCESS 0 245 #define SUCCESS_DATPEND 1 246 #define FAILURE_CSMACA 2 247 #define FAILURE_NOACK 3 248 #define AUTO_STATUS_MASK 0x3 249 250 #define PRAM_PAGESIZE 256 251 252 /* IRQ1 */ 253 254 #define IRQ_CCA_COMPLETE BIT(0) 255 #define IRQ_SFD_RX BIT(1) 256 #define IRQ_SFD_TX BIT(2) 257 #define IRQ_RX_PKT_RCVD BIT(3) 258 #define IRQ_TX_PKT_SENT BIT(4) 259 #define IRQ_FRAME_VALID BIT(5) 260 #define IRQ_ADDRESS_VALID BIT(6) 261 #define IRQ_CSMA_CA BIT(7) 262 263 #define AUTO_TX_TURNAROUND BIT(3) 264 #define ADDON_EN BIT(4) 265 266 #define FLAG_XMIT 0 267 #define FLAG_START 1 268 269 #define ADF7242_REPORT_CSMA_CA_STAT 0 /* framework doesn't handle yet */ 270 271 struct adf7242_local { 272 struct spi_device *spi; 273 struct completion tx_complete; 274 struct ieee802154_hw *hw; 275 struct mutex bmux; /* protect SPI messages */ 276 struct spi_message stat_msg; 277 struct spi_transfer stat_xfer; 278 struct dentry *debugfs_root; 279 unsigned long flags; 280 int tx_stat; 281 bool promiscuous; 282 s8 rssi; 283 u8 max_frame_retries; 284 u8 max_cca_retries; 285 u8 max_be; 286 u8 min_be; 287 288 /* DMA (thus cache coherency maintenance) requires the 289 * transfer buffers to live in their own cache lines. 290 */ 291 292 u8 buf[3] ____cacheline_aligned; 293 u8 buf_reg_tx[3]; 294 u8 buf_read_tx[4]; 295 u8 buf_read_rx[4]; 296 u8 buf_stat_rx; 297 u8 buf_stat_tx; 298 u8 buf_cmd; 299 }; 300 301 static int adf7242_soft_reset(struct adf7242_local *lp, int line); 302 303 static int adf7242_status(struct adf7242_local *lp, u8 *stat) 304 { 305 int status; 306 307 mutex_lock(&lp->bmux); 308 status = spi_sync(lp->spi, &lp->stat_msg); 309 *stat = lp->buf_stat_rx; 310 mutex_unlock(&lp->bmux); 311 312 return status; 313 } 314 315 static int adf7242_wait_status(struct adf7242_local *lp, unsigned status, 316 unsigned mask, int line) 317 { 318 int cnt = 0, ret = 0; 319 u8 stat; 320 321 do { 322 adf7242_status(lp, &stat); 323 cnt++; 324 } while (((stat & mask) != status) && (cnt < MAX_POLL_LOOPS)); 325 326 if (cnt >= MAX_POLL_LOOPS) { 327 ret = -ETIMEDOUT; 328 329 if (!(stat & STAT_RC_READY)) { 330 adf7242_soft_reset(lp, line); 331 adf7242_status(lp, &stat); 332 333 if ((stat & mask) == status) 334 ret = 0; 335 } 336 337 if (ret < 0) 338 dev_warn(&lp->spi->dev, 339 "%s:line %d Timeout status 0x%x (%d)\n", 340 __func__, line, stat, cnt); 341 } 342 343 dev_vdbg(&lp->spi->dev, "%s : loops=%d line %d\n", __func__, cnt, line); 344 345 return ret; 346 } 347 348 static int adf7242_wait_ready(struct adf7242_local *lp, int line) 349 { 350 return adf7242_wait_status(lp, STAT_RC_READY | STAT_SPI_READY, 351 STAT_RC_READY | STAT_SPI_READY, line); 352 } 353 354 static int adf7242_write_fbuf(struct adf7242_local *lp, u8 *data, u8 len) 355 { 356 u8 *buf = lp->buf; 357 int status; 358 struct spi_message msg; 359 struct spi_transfer xfer_head = { 360 .len = 2, 361 .tx_buf = buf, 362 363 }; 364 struct spi_transfer xfer_buf = { 365 .len = len, 366 .tx_buf = data, 367 }; 368 369 spi_message_init(&msg); 370 spi_message_add_tail(&xfer_head, &msg); 371 spi_message_add_tail(&xfer_buf, &msg); 372 373 adf7242_wait_ready(lp, __LINE__); 374 375 mutex_lock(&lp->bmux); 376 buf[0] = CMD_SPI_PKT_WR; 377 buf[1] = len + 2; 378 379 status = spi_sync(lp->spi, &msg); 380 mutex_unlock(&lp->bmux); 381 382 return status; 383 } 384 385 static int adf7242_read_fbuf(struct adf7242_local *lp, 386 u8 *data, size_t len, bool packet_read) 387 { 388 u8 *buf = lp->buf; 389 int status; 390 struct spi_message msg; 391 struct spi_transfer xfer_head = { 392 .len = 3, 393 .tx_buf = buf, 394 .rx_buf = buf, 395 }; 396 struct spi_transfer xfer_buf = { 397 .len = len, 398 .rx_buf = data, 399 }; 400 401 spi_message_init(&msg); 402 spi_message_add_tail(&xfer_head, &msg); 403 spi_message_add_tail(&xfer_buf, &msg); 404 405 adf7242_wait_ready(lp, __LINE__); 406 407 mutex_lock(&lp->bmux); 408 if (packet_read) { 409 buf[0] = CMD_SPI_PKT_RD; 410 buf[1] = CMD_SPI_NOP; 411 buf[2] = 0; /* PHR */ 412 } else { 413 buf[0] = CMD_SPI_PRAM_RD; 414 buf[1] = 0; 415 buf[2] = CMD_SPI_NOP; 416 } 417 418 status = spi_sync(lp->spi, &msg); 419 420 mutex_unlock(&lp->bmux); 421 422 return status; 423 } 424 425 static int adf7242_read_reg(struct adf7242_local *lp, u16 addr, u8 *data) 426 { 427 int status; 428 struct spi_message msg; 429 430 struct spi_transfer xfer = { 431 .len = 4, 432 .tx_buf = lp->buf_read_tx, 433 .rx_buf = lp->buf_read_rx, 434 }; 435 436 adf7242_wait_ready(lp, __LINE__); 437 438 mutex_lock(&lp->bmux); 439 lp->buf_read_tx[0] = CMD_SPI_MEM_RD(addr); 440 lp->buf_read_tx[1] = addr; 441 lp->buf_read_tx[2] = CMD_SPI_NOP; 442 lp->buf_read_tx[3] = CMD_SPI_NOP; 443 444 spi_message_init(&msg); 445 spi_message_add_tail(&xfer, &msg); 446 447 status = spi_sync(lp->spi, &msg); 448 if (msg.status) 449 status = msg.status; 450 451 if (!status) 452 *data = lp->buf_read_rx[3]; 453 454 mutex_unlock(&lp->bmux); 455 456 dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", __func__, 457 addr, *data); 458 459 return status; 460 } 461 462 static int adf7242_write_reg(struct adf7242_local *lp, u16 addr, u8 data) 463 { 464 int status; 465 466 adf7242_wait_ready(lp, __LINE__); 467 468 mutex_lock(&lp->bmux); 469 lp->buf_reg_tx[0] = CMD_SPI_MEM_WR(addr); 470 lp->buf_reg_tx[1] = addr; 471 lp->buf_reg_tx[2] = data; 472 status = spi_write(lp->spi, lp->buf_reg_tx, 3); 473 mutex_unlock(&lp->bmux); 474 475 dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", 476 __func__, addr, data); 477 478 return status; 479 } 480 481 static int adf7242_cmd(struct adf7242_local *lp, unsigned cmd) 482 { 483 int status; 484 485 dev_vdbg(&lp->spi->dev, "%s : CMD=0x%X\n", __func__, cmd); 486 487 if (cmd != CMD_RC_PC_RESET_NO_WAIT) 488 adf7242_wait_ready(lp, __LINE__); 489 490 mutex_lock(&lp->bmux); 491 lp->buf_cmd = cmd; 492 status = spi_write(lp->spi, &lp->buf_cmd, 1); 493 mutex_unlock(&lp->bmux); 494 495 return status; 496 } 497 498 static int adf7242_upload_firmware(struct adf7242_local *lp, u8 *data, u16 len) 499 { 500 struct spi_message msg; 501 struct spi_transfer xfer_buf = { }; 502 int status, i, page = 0; 503 u8 *buf = lp->buf; 504 505 struct spi_transfer xfer_head = { 506 .len = 2, 507 .tx_buf = buf, 508 }; 509 510 buf[0] = CMD_SPI_PRAM_WR; 511 buf[1] = 0; 512 513 spi_message_init(&msg); 514 spi_message_add_tail(&xfer_head, &msg); 515 spi_message_add_tail(&xfer_buf, &msg); 516 517 for (i = len; i >= 0; i -= PRAM_PAGESIZE) { 518 adf7242_write_reg(lp, REG_PRAMPG, page); 519 520 xfer_buf.len = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i; 521 xfer_buf.tx_buf = &data[page * PRAM_PAGESIZE]; 522 523 mutex_lock(&lp->bmux); 524 status = spi_sync(lp->spi, &msg); 525 mutex_unlock(&lp->bmux); 526 page++; 527 } 528 529 return status; 530 } 531 532 static int adf7242_verify_firmware(struct adf7242_local *lp, 533 const u8 *data, size_t len) 534 { 535 #ifdef DEBUG 536 int i, j; 537 unsigned int page; 538 u8 *buf = kmalloc(PRAM_PAGESIZE, GFP_KERNEL); 539 540 if (!buf) 541 return -ENOMEM; 542 543 for (page = 0, i = len; i >= 0; i -= PRAM_PAGESIZE, page++) { 544 size_t nb = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i; 545 546 adf7242_write_reg(lp, REG_PRAMPG, page); 547 adf7242_read_fbuf(lp, buf, nb, false); 548 549 for (j = 0; j < nb; j++) { 550 if (buf[j] != data[page * PRAM_PAGESIZE + j]) { 551 kfree(buf); 552 return -EIO; 553 } 554 } 555 } 556 kfree(buf); 557 #endif 558 return 0; 559 } 560 561 static int adf7242_set_txpower(struct ieee802154_hw *hw, int mbm) 562 { 563 struct adf7242_local *lp = hw->priv; 564 u8 pwr, bias_ctrl, dbias, tmp; 565 int db = mbm / 100; 566 567 dev_vdbg(&lp->spi->dev, "%s : Power %d dB\n", __func__, db); 568 569 if (db > 5 || db < -26) 570 return -EINVAL; 571 572 db = DIV_ROUND_CLOSEST(db + 29, 2); 573 574 if (db > 15) { 575 dbias = PA_DBIAS_HIGH_POWER; 576 bias_ctrl = PA_BIAS_HIGH_POWER; 577 } else { 578 dbias = PA_DBIAS_LOW_POWER; 579 bias_ctrl = PA_BIAS_LOW_POWER; 580 } 581 582 pwr = clamp_t(u8, db, 3, 15); 583 584 adf7242_read_reg(lp, REG_PA_CFG, &tmp); 585 tmp &= ~PA_BRIDGE_DBIAS(~0); 586 tmp |= PA_BRIDGE_DBIAS(dbias); 587 adf7242_write_reg(lp, REG_PA_CFG, tmp); 588 589 adf7242_read_reg(lp, REG_PA_BIAS, &tmp); 590 tmp &= ~PA_BIAS_CTRL(~0); 591 tmp |= PA_BIAS_CTRL(bias_ctrl); 592 adf7242_write_reg(lp, REG_PA_BIAS, tmp); 593 594 adf7242_read_reg(lp, REG_EXTPA_MSC, &tmp); 595 tmp &= ~PA_PWR(~0); 596 tmp |= PA_PWR(pwr); 597 598 return adf7242_write_reg(lp, REG_EXTPA_MSC, tmp); 599 } 600 601 static int adf7242_set_csma_params(struct ieee802154_hw *hw, u8 min_be, 602 u8 max_be, u8 retries) 603 { 604 struct adf7242_local *lp = hw->priv; 605 int ret; 606 607 dev_vdbg(&lp->spi->dev, "%s : min_be=%d max_be=%d retries=%d\n", 608 __func__, min_be, max_be, retries); 609 610 if (min_be > max_be || max_be > 8 || retries > 5) 611 return -EINVAL; 612 613 ret = adf7242_write_reg(lp, REG_AUTO_TX1, 614 MAX_FRAME_RETRIES(lp->max_frame_retries) | 615 MAX_CCA_RETRIES(retries)); 616 if (ret) 617 return ret; 618 619 lp->max_cca_retries = retries; 620 lp->max_be = max_be; 621 lp->min_be = min_be; 622 623 return adf7242_write_reg(lp, REG_AUTO_TX2, CSMA_MAX_BE(max_be) | 624 CSMA_MIN_BE(min_be)); 625 } 626 627 static int adf7242_set_frame_retries(struct ieee802154_hw *hw, s8 retries) 628 { 629 struct adf7242_local *lp = hw->priv; 630 int ret = 0; 631 632 dev_vdbg(&lp->spi->dev, "%s : Retries = %d\n", __func__, retries); 633 634 if (retries < -1 || retries > 15) 635 return -EINVAL; 636 637 if (retries >= 0) 638 ret = adf7242_write_reg(lp, REG_AUTO_TX1, 639 MAX_FRAME_RETRIES(retries) | 640 MAX_CCA_RETRIES(lp->max_cca_retries)); 641 642 lp->max_frame_retries = retries; 643 644 return ret; 645 } 646 647 static int adf7242_ed(struct ieee802154_hw *hw, u8 *level) 648 { 649 struct adf7242_local *lp = hw->priv; 650 651 *level = lp->rssi; 652 653 dev_vdbg(&lp->spi->dev, "%s :Exit level=%d\n", 654 __func__, *level); 655 656 return 0; 657 } 658 659 static int adf7242_start(struct ieee802154_hw *hw) 660 { 661 struct adf7242_local *lp = hw->priv; 662 663 adf7242_cmd(lp, CMD_RC_PHY_RDY); 664 adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF); 665 enable_irq(lp->spi->irq); 666 set_bit(FLAG_START, &lp->flags); 667 668 return adf7242_cmd(lp, CMD_RC_RX); 669 } 670 671 static void adf7242_stop(struct ieee802154_hw *hw) 672 { 673 struct adf7242_local *lp = hw->priv; 674 675 adf7242_cmd(lp, CMD_RC_IDLE); 676 clear_bit(FLAG_START, &lp->flags); 677 disable_irq(lp->spi->irq); 678 adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF); 679 } 680 681 static int adf7242_channel(struct ieee802154_hw *hw, u8 page, u8 channel) 682 { 683 struct adf7242_local *lp = hw->priv; 684 unsigned long freq; 685 686 dev_dbg(&lp->spi->dev, "%s :Channel=%d\n", __func__, channel); 687 688 might_sleep(); 689 690 WARN_ON(page != 0); 691 WARN_ON(channel < 11); 692 WARN_ON(channel > 26); 693 694 freq = (2405 + 5 * (channel - 11)) * 100; 695 adf7242_cmd(lp, CMD_RC_PHY_RDY); 696 697 adf7242_write_reg(lp, REG_CH_FREQ0, freq); 698 adf7242_write_reg(lp, REG_CH_FREQ1, freq >> 8); 699 adf7242_write_reg(lp, REG_CH_FREQ2, freq >> 16); 700 701 return adf7242_cmd(lp, CMD_RC_RX); 702 } 703 704 static int adf7242_set_hw_addr_filt(struct ieee802154_hw *hw, 705 struct ieee802154_hw_addr_filt *filt, 706 unsigned long changed) 707 { 708 struct adf7242_local *lp = hw->priv; 709 u8 reg; 710 711 dev_dbg(&lp->spi->dev, "%s :Changed=0x%lX\n", __func__, changed); 712 713 might_sleep(); 714 715 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { 716 u8 addr[8], i; 717 718 memcpy(addr, &filt->ieee_addr, 8); 719 720 for (i = 0; i < 8; i++) 721 adf7242_write_reg(lp, REG_IEEE_ADDR_0 + i, addr[i]); 722 } 723 724 if (changed & IEEE802154_AFILT_SADDR_CHANGED) { 725 u16 saddr = le16_to_cpu(filt->short_addr); 726 727 adf7242_write_reg(lp, REG_SHORT_ADDR_0, saddr); 728 adf7242_write_reg(lp, REG_SHORT_ADDR_1, saddr >> 8); 729 } 730 731 if (changed & IEEE802154_AFILT_PANID_CHANGED) { 732 u16 pan_id = le16_to_cpu(filt->pan_id); 733 734 adf7242_write_reg(lp, REG_PAN_ID0, pan_id); 735 adf7242_write_reg(lp, REG_PAN_ID1, pan_id >> 8); 736 } 737 738 if (changed & IEEE802154_AFILT_PANC_CHANGED) { 739 adf7242_read_reg(lp, REG_AUTO_CFG, ®); 740 if (filt->pan_coord) 741 reg |= IS_PANCOORD; 742 else 743 reg &= ~IS_PANCOORD; 744 adf7242_write_reg(lp, REG_AUTO_CFG, reg); 745 } 746 747 return 0; 748 } 749 750 static int adf7242_set_promiscuous_mode(struct ieee802154_hw *hw, bool on) 751 { 752 struct adf7242_local *lp = hw->priv; 753 754 dev_dbg(&lp->spi->dev, "%s : mode %d\n", __func__, on); 755 756 lp->promiscuous = on; 757 758 if (on) { 759 adf7242_write_reg(lp, REG_AUTO_CFG, 0); 760 return adf7242_write_reg(lp, REG_FFILT_CFG, 761 ACCEPT_BEACON_FRAMES | 762 ACCEPT_DATA_FRAMES | 763 ACCEPT_MACCMD_FRAMES | 764 ACCEPT_ALL_ADDRESS | 765 ACCEPT_ACK_FRAMES | 766 ACCEPT_RESERVED_FRAMES); 767 } else { 768 adf7242_write_reg(lp, REG_FFILT_CFG, 769 ACCEPT_BEACON_FRAMES | 770 ACCEPT_DATA_FRAMES | 771 ACCEPT_MACCMD_FRAMES | 772 ACCEPT_RESERVED_FRAMES); 773 774 return adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN); 775 } 776 } 777 778 static int adf7242_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm) 779 { 780 struct adf7242_local *lp = hw->priv; 781 s8 level = clamp_t(s8, mbm / 100, S8_MIN, S8_MAX); 782 783 dev_dbg(&lp->spi->dev, "%s : level %d\n", __func__, level); 784 785 return adf7242_write_reg(lp, REG_CCA1, level); 786 } 787 788 static int adf7242_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) 789 { 790 struct adf7242_local *lp = hw->priv; 791 int ret; 792 793 set_bit(FLAG_XMIT, &lp->flags); 794 reinit_completion(&lp->tx_complete); 795 adf7242_cmd(lp, CMD_RC_PHY_RDY); 796 797 ret = adf7242_write_fbuf(lp, skb->data, skb->len); 798 if (ret) 799 goto err; 800 801 ret = adf7242_cmd(lp, CMD_RC_CSMACA); 802 if (ret) 803 goto err; 804 805 ret = wait_for_completion_interruptible_timeout(&lp->tx_complete, 806 HZ / 10); 807 if (ret < 0) 808 goto err; 809 if (ret == 0) { 810 dev_dbg(&lp->spi->dev, "Timeout waiting for TX interrupt\n"); 811 ret = -ETIMEDOUT; 812 goto err; 813 } 814 815 if (lp->tx_stat != SUCCESS) { 816 dev_dbg(&lp->spi->dev, 817 "Error xmit: Retry count exceeded Status=0x%x\n", 818 lp->tx_stat); 819 ret = -ECOMM; 820 } else { 821 ret = 0; 822 } 823 824 err: 825 clear_bit(FLAG_XMIT, &lp->flags); 826 adf7242_cmd(lp, CMD_RC_RX); 827 828 return ret; 829 } 830 831 static int adf7242_rx(struct adf7242_local *lp) 832 { 833 struct sk_buff *skb; 834 size_t len; 835 int ret; 836 u8 lqi, len_u8, *data; 837 838 adf7242_read_reg(lp, 0, &len_u8); 839 840 len = len_u8; 841 842 if (!ieee802154_is_valid_psdu_len(len)) { 843 dev_dbg(&lp->spi->dev, 844 "corrupted frame received len %d\n", (int)len); 845 len = IEEE802154_MTU; 846 } 847 848 skb = dev_alloc_skb(len); 849 if (!skb) { 850 adf7242_cmd(lp, CMD_RC_RX); 851 return -ENOMEM; 852 } 853 854 data = skb_put(skb, len); 855 ret = adf7242_read_fbuf(lp, data, len, true); 856 if (ret < 0) { 857 kfree_skb(skb); 858 adf7242_cmd(lp, CMD_RC_RX); 859 return ret; 860 } 861 862 lqi = data[len - 2]; 863 lp->rssi = data[len - 1]; 864 865 adf7242_cmd(lp, CMD_RC_RX); 866 867 skb_trim(skb, len - 2); /* Don't put RSSI/LQI or CRC into the frame */ 868 869 ieee802154_rx_irqsafe(lp->hw, skb, lqi); 870 871 dev_dbg(&lp->spi->dev, "%s: ret=%d len=%d lqi=%d rssi=%d\n", 872 __func__, ret, (int)len, (int)lqi, lp->rssi); 873 874 return 0; 875 } 876 877 static struct ieee802154_ops adf7242_ops = { 878 .owner = THIS_MODULE, 879 .xmit_sync = adf7242_xmit, 880 .ed = adf7242_ed, 881 .set_channel = adf7242_channel, 882 .set_hw_addr_filt = adf7242_set_hw_addr_filt, 883 .start = adf7242_start, 884 .stop = adf7242_stop, 885 .set_csma_params = adf7242_set_csma_params, 886 .set_frame_retries = adf7242_set_frame_retries, 887 .set_txpower = adf7242_set_txpower, 888 .set_promiscuous_mode = adf7242_set_promiscuous_mode, 889 .set_cca_ed_level = adf7242_set_cca_ed_level, 890 }; 891 892 static void adf7242_debug(u8 irq1) 893 { 894 #ifdef DEBUG 895 u8 stat; 896 897 adf7242_status(lp, &stat); 898 899 dev_dbg(&lp->spi->dev, "%s IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n", 900 __func__, irq1, 901 irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "", 902 irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "", 903 irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "", 904 irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "", 905 irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "", 906 irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "", 907 irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "", 908 irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : ""); 909 910 dev_dbg(&lp->spi->dev, "%s STATUS = %X:\n%s\n%s%s%s%s%s\n", 911 __func__, stat, 912 stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY", 913 (stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "", 914 (stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "", 915 (stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "", 916 (stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "", 917 (stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : ""); 918 } 919 #endif 920 } 921 922 static irqreturn_t adf7242_isr(int irq, void *data) 923 { 924 struct adf7242_local *lp = data; 925 unsigned xmit; 926 u8 irq1; 927 928 adf7242_wait_status(lp, RC_STATUS_PHY_RDY, RC_STATUS_MASK, __LINE__); 929 930 adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1); 931 adf7242_write_reg(lp, REG_IRQ1_SRC1, irq1); 932 933 if (!(irq1 & (IRQ_RX_PKT_RCVD | IRQ_CSMA_CA))) 934 dev_err(&lp->spi->dev, "%s :ERROR IRQ1 = 0x%X\n", 935 __func__, irq1); 936 937 adf7242_debug(irq1); 938 939 xmit = test_bit(FLAG_XMIT, &lp->flags); 940 941 if (xmit && (irq1 & IRQ_CSMA_CA)) { 942 if (ADF7242_REPORT_CSMA_CA_STAT) { 943 u8 astat; 944 945 adf7242_read_reg(lp, REG_AUTO_STATUS, &astat); 946 astat &= AUTO_STATUS_MASK; 947 948 dev_dbg(&lp->spi->dev, "AUTO_STATUS = %X:\n%s%s%s%s\n", 949 astat, 950 astat == SUCCESS ? "SUCCESS" : "", 951 astat == 952 SUCCESS_DATPEND ? "SUCCESS_DATPEND" : "", 953 astat == FAILURE_CSMACA ? "FAILURE_CSMACA" : "", 954 astat == FAILURE_NOACK ? "FAILURE_NOACK" : ""); 955 956 /* save CSMA-CA completion status */ 957 lp->tx_stat = astat; 958 } else { 959 lp->tx_stat = SUCCESS; 960 } 961 complete(&lp->tx_complete); 962 } else if (!xmit && (irq1 & IRQ_RX_PKT_RCVD) && 963 (irq1 & IRQ_FRAME_VALID)) { 964 adf7242_rx(lp); 965 } else if (!xmit && test_bit(FLAG_START, &lp->flags)) { 966 /* Invalid packet received - drop it and restart */ 967 dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X\n", 968 __func__, __LINE__, irq1); 969 adf7242_cmd(lp, CMD_RC_PHY_RDY); 970 adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF); 971 adf7242_cmd(lp, CMD_RC_RX); 972 } else { 973 /* This can only be xmit without IRQ, likely a RX packet. 974 * we get an TX IRQ shortly - do nothing or let the xmit 975 * timeout handle this 976 */ 977 dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X, xmit %d\n", 978 __func__, __LINE__, irq1, xmit); 979 complete(&lp->tx_complete); 980 } 981 982 return IRQ_HANDLED; 983 } 984 985 static int adf7242_soft_reset(struct adf7242_local *lp, int line) 986 { 987 dev_warn(&lp->spi->dev, "%s (line %d)\n", __func__, line); 988 989 if (test_bit(FLAG_START, &lp->flags)) 990 disable_irq_nosync(lp->spi->irq); 991 992 adf7242_cmd(lp, CMD_RC_PC_RESET_NO_WAIT); 993 usleep_range(200, 250); 994 adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2)); 995 adf7242_cmd(lp, CMD_RC_PHY_RDY); 996 adf7242_set_promiscuous_mode(lp->hw, lp->promiscuous); 997 adf7242_set_csma_params(lp->hw, lp->min_be, lp->max_be, 998 lp->max_cca_retries); 999 adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF); 1000 1001 if (test_bit(FLAG_START, &lp->flags)) { 1002 enable_irq(lp->spi->irq); 1003 return adf7242_cmd(lp, CMD_RC_RX); 1004 } 1005 1006 return 0; 1007 } 1008 1009 static int adf7242_hw_init(struct adf7242_local *lp) 1010 { 1011 int ret; 1012 const struct firmware *fw; 1013 1014 adf7242_cmd(lp, CMD_RC_RESET); 1015 adf7242_cmd(lp, CMD_RC_IDLE); 1016 1017 /* get ADF7242 addon firmware 1018 * build this driver as module 1019 * and place under /lib/firmware/adf7242_firmware.bin 1020 * or compile firmware into the kernel. 1021 */ 1022 ret = request_firmware(&fw, FIRMWARE, &lp->spi->dev); 1023 if (ret) { 1024 dev_err(&lp->spi->dev, 1025 "request_firmware() failed with %d\n", ret); 1026 return ret; 1027 } 1028 1029 ret = adf7242_upload_firmware(lp, (u8 *)fw->data, fw->size); 1030 if (ret) { 1031 dev_err(&lp->spi->dev, 1032 "upload firmware failed with %d\n", ret); 1033 return ret; 1034 } 1035 1036 ret = adf7242_verify_firmware(lp, (u8 *)fw->data, fw->size); 1037 if (ret) { 1038 dev_err(&lp->spi->dev, 1039 "verify firmware failed with %d\n", ret); 1040 return ret; 1041 } 1042 1043 adf7242_cmd(lp, CMD_RC_PC_RESET); 1044 1045 release_firmware(fw); 1046 1047 adf7242_write_reg(lp, REG_FFILT_CFG, 1048 ACCEPT_BEACON_FRAMES | 1049 ACCEPT_DATA_FRAMES | 1050 ACCEPT_MACCMD_FRAMES | 1051 ACCEPT_RESERVED_FRAMES); 1052 1053 adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN); 1054 1055 adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2)); 1056 1057 adf7242_write_reg(lp, REG_EXTPA_MSC, 0xF1); 1058 adf7242_write_reg(lp, REG_RXFE_CFG, 0x1D); 1059 1060 adf7242_write_reg(lp, REG_IRQ1_EN0, 0); 1061 adf7242_write_reg(lp, REG_IRQ1_EN1, IRQ_RX_PKT_RCVD | IRQ_CSMA_CA); 1062 1063 adf7242_write_reg(lp, REG_IRQ1_SRC1, 0xFF); 1064 adf7242_write_reg(lp, REG_IRQ1_SRC0, 0xFF); 1065 1066 adf7242_cmd(lp, CMD_RC_IDLE); 1067 1068 return 0; 1069 } 1070 1071 static int adf7242_stats_show(struct seq_file *file, void *offset) 1072 { 1073 struct adf7242_local *lp = spi_get_drvdata(file->private); 1074 u8 stat, irq1; 1075 1076 adf7242_status(lp, &stat); 1077 adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1); 1078 1079 seq_printf(file, "IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n", irq1, 1080 irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "", 1081 irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "", 1082 irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "", 1083 irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "", 1084 irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "", 1085 irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "", 1086 irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "", 1087 irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : ""); 1088 1089 seq_printf(file, "STATUS = %X:\n%s\n%s%s%s%s%s\n", stat, 1090 stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY", 1091 (stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "", 1092 (stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "", 1093 (stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "", 1094 (stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "", 1095 (stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : ""); 1096 1097 seq_printf(file, "RSSI = %d\n", lp->rssi); 1098 1099 return 0; 1100 } 1101 1102 static int adf7242_debugfs_init(struct adf7242_local *lp) 1103 { 1104 char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "adf7242-"; 1105 struct dentry *stats; 1106 1107 strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN); 1108 1109 lp->debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL); 1110 if (IS_ERR_OR_NULL(lp->debugfs_root)) 1111 return PTR_ERR_OR_ZERO(lp->debugfs_root); 1112 1113 stats = debugfs_create_devm_seqfile(&lp->spi->dev, "status", 1114 lp->debugfs_root, 1115 adf7242_stats_show); 1116 return PTR_ERR_OR_ZERO(stats); 1117 1118 return 0; 1119 } 1120 1121 static const s32 adf7242_powers[] = { 1122 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700, 1123 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700, 1124 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600, 1125 }; 1126 1127 static const s32 adf7242_ed_levels[] = { 1128 -9000, -8900, -8800, -8700, -8600, -8500, -8400, -8300, -8200, -8100, 1129 -8000, -7900, -7800, -7700, -7600, -7500, -7400, -7300, -7200, -7100, 1130 -7000, -6900, -6800, -6700, -6600, -6500, -6400, -6300, -6200, -6100, 1131 -6000, -5900, -5800, -5700, -5600, -5500, -5400, -5300, -5200, -5100, 1132 -5000, -4900, -4800, -4700, -4600, -4500, -4400, -4300, -4200, -4100, 1133 -4000, -3900, -3800, -3700, -3600, -3500, -3400, -3200, -3100, -3000 1134 }; 1135 1136 static int adf7242_probe(struct spi_device *spi) 1137 { 1138 struct ieee802154_hw *hw; 1139 struct adf7242_local *lp; 1140 int ret, irq_type; 1141 1142 if (!spi->irq) { 1143 dev_err(&spi->dev, "no IRQ specified\n"); 1144 return -EINVAL; 1145 } 1146 1147 hw = ieee802154_alloc_hw(sizeof(*lp), &adf7242_ops); 1148 if (!hw) 1149 return -ENOMEM; 1150 1151 lp = hw->priv; 1152 lp->hw = hw; 1153 lp->spi = spi; 1154 1155 hw->priv = lp; 1156 hw->parent = &spi->dev; 1157 hw->extra_tx_headroom = 0; 1158 1159 /* We support only 2.4 Ghz */ 1160 hw->phy->supported.channels[0] = 0x7FFF800; 1161 1162 hw->flags = IEEE802154_HW_OMIT_CKSUM | 1163 IEEE802154_HW_CSMA_PARAMS | 1164 IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT | 1165 IEEE802154_HW_PROMISCUOUS; 1166 1167 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | 1168 WPAN_PHY_FLAG_CCA_ED_LEVEL | 1169 WPAN_PHY_FLAG_CCA_MODE; 1170 1171 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY); 1172 1173 hw->phy->supported.cca_ed_levels = adf7242_ed_levels; 1174 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(adf7242_ed_levels); 1175 1176 hw->phy->cca.mode = NL802154_CCA_ENERGY; 1177 1178 hw->phy->supported.tx_powers = adf7242_powers; 1179 hw->phy->supported.tx_powers_size = ARRAY_SIZE(adf7242_powers); 1180 1181 hw->phy->supported.min_minbe = 0; 1182 hw->phy->supported.max_minbe = 8; 1183 1184 hw->phy->supported.min_maxbe = 3; 1185 hw->phy->supported.max_maxbe = 8; 1186 1187 hw->phy->supported.min_frame_retries = 0; 1188 hw->phy->supported.max_frame_retries = 15; 1189 1190 hw->phy->supported.min_csma_backoffs = 0; 1191 hw->phy->supported.max_csma_backoffs = 5; 1192 1193 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); 1194 1195 mutex_init(&lp->bmux); 1196 init_completion(&lp->tx_complete); 1197 1198 /* Setup Status Message */ 1199 lp->stat_xfer.len = 1; 1200 lp->stat_xfer.tx_buf = &lp->buf_stat_tx; 1201 lp->stat_xfer.rx_buf = &lp->buf_stat_rx; 1202 lp->buf_stat_tx = CMD_SPI_NOP; 1203 1204 spi_message_init(&lp->stat_msg); 1205 spi_message_add_tail(&lp->stat_xfer, &lp->stat_msg); 1206 1207 spi_set_drvdata(spi, lp); 1208 1209 ret = adf7242_hw_init(lp); 1210 if (ret) 1211 goto err_hw_init; 1212 1213 irq_type = irq_get_trigger_type(spi->irq); 1214 if (!irq_type) 1215 irq_type = IRQF_TRIGGER_HIGH; 1216 1217 ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, adf7242_isr, 1218 irq_type | IRQF_ONESHOT, 1219 dev_name(&spi->dev), lp); 1220 if (ret) 1221 goto err_hw_init; 1222 1223 disable_irq(spi->irq); 1224 1225 ret = ieee802154_register_hw(lp->hw); 1226 if (ret) 1227 goto err_hw_init; 1228 1229 dev_set_drvdata(&spi->dev, lp); 1230 1231 adf7242_debugfs_init(lp); 1232 1233 dev_info(&spi->dev, "mac802154 IRQ-%d registered\n", spi->irq); 1234 1235 return ret; 1236 1237 err_hw_init: 1238 mutex_destroy(&lp->bmux); 1239 ieee802154_free_hw(lp->hw); 1240 1241 return ret; 1242 } 1243 1244 static int adf7242_remove(struct spi_device *spi) 1245 { 1246 struct adf7242_local *lp = spi_get_drvdata(spi); 1247 1248 if (!IS_ERR_OR_NULL(lp->debugfs_root)) 1249 debugfs_remove_recursive(lp->debugfs_root); 1250 1251 ieee802154_unregister_hw(lp->hw); 1252 mutex_destroy(&lp->bmux); 1253 ieee802154_free_hw(lp->hw); 1254 1255 return 0; 1256 } 1257 1258 static const struct of_device_id adf7242_of_match[] = { 1259 { .compatible = "adi,adf7242", }, 1260 { }, 1261 }; 1262 MODULE_DEVICE_TABLE(of, adf7242_of_match); 1263 1264 static const struct spi_device_id adf7242_device_id[] = { 1265 { .name = "adf7242", }, 1266 { }, 1267 }; 1268 MODULE_DEVICE_TABLE(spi, adf7242_device_id); 1269 1270 static struct spi_driver adf7242_driver = { 1271 .id_table = adf7242_device_id, 1272 .driver = { 1273 .of_match_table = of_match_ptr(adf7242_of_match), 1274 .name = "adf7242", 1275 .owner = THIS_MODULE, 1276 }, 1277 .probe = adf7242_probe, 1278 .remove = adf7242_remove, 1279 }; 1280 1281 module_spi_driver(adf7242_driver); 1282 1283 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); 1284 MODULE_DESCRIPTION("ADF7242 IEEE802.15.4 Transceiver Driver"); 1285 MODULE_LICENSE("GPL"); 1286