1 /* 2 * Analog Devices ADF7242 Low-Power IEEE 802.15.4 Transceiver 3 * 4 * Copyright 2009-2017 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/debugfs.h> 24 #include <linux/bitops.h> 25 #include <linux/ieee802154.h> 26 #include <net/mac802154.h> 27 #include <net/cfg802154.h> 28 29 #define FIRMWARE "adf7242_firmware.bin" 30 #define MAX_POLL_LOOPS 200 31 32 /* All Registers */ 33 34 #define REG_EXT_CTRL 0x100 /* RW External LNA/PA and internal PA control */ 35 #define REG_TX_FSK_TEST 0x101 /* RW TX FSK test mode configuration */ 36 #define REG_CCA1 0x105 /* RW RSSI threshold for CCA */ 37 #define REG_CCA2 0x106 /* RW CCA mode configuration */ 38 #define REG_BUFFERCFG 0x107 /* RW RX_BUFFER overwrite control */ 39 #define REG_PKT_CFG 0x108 /* RW FCS evaluation configuration */ 40 #define REG_DELAYCFG0 0x109 /* RW RC_RX command to SFD or sync word delay */ 41 #define REG_DELAYCFG1 0x10A /* RW RC_TX command to TX state */ 42 #define REG_DELAYCFG2 0x10B /* RW Mac delay extension */ 43 #define REG_SYNC_WORD0 0x10C /* RW sync word bits [7:0] of [23:0] */ 44 #define REG_SYNC_WORD1 0x10D /* RW sync word bits [15:8] of [23:0] */ 45 #define REG_SYNC_WORD2 0x10E /* RW sync word bits [23:16] of [23:0] */ 46 #define REG_SYNC_CONFIG 0x10F /* RW sync word configuration */ 47 #define REG_RC_CFG 0x13E /* RW RX / TX packet configuration */ 48 #define REG_RC_VAR44 0x13F /* RW RESERVED */ 49 #define REG_CH_FREQ0 0x300 /* RW Channel Frequency Settings - Low */ 50 #define REG_CH_FREQ1 0x301 /* RW Channel Frequency Settings - Middle */ 51 #define REG_CH_FREQ2 0x302 /* RW Channel Frequency Settings - High */ 52 #define REG_TX_FD 0x304 /* RW TX Frequency Deviation Register */ 53 #define REG_DM_CFG0 0x305 /* RW RX Discriminator BW Register */ 54 #define REG_TX_M 0x306 /* RW TX Mode Register */ 55 #define REG_RX_M 0x307 /* RW RX Mode Register */ 56 #define REG_RRB 0x30C /* R RSSI Readback Register */ 57 #define REG_LRB 0x30D /* R Link Quality Readback Register */ 58 #define REG_DR0 0x30E /* RW bits [15:8] of [15:0] data rate setting */ 59 #define REG_DR1 0x30F /* RW bits [7:0] of [15:0] data rate setting */ 60 #define REG_PRAMPG 0x313 /* RW RESERVED */ 61 #define REG_TXPB 0x314 /* RW TX Packet Storage Base Address */ 62 #define REG_RXPB 0x315 /* RW RX Packet Storage Base Address */ 63 #define REG_TMR_CFG0 0x316 /* RW Wake up Timer Conf Register - High */ 64 #define REG_TMR_CFG1 0x317 /* RW Wake up Timer Conf Register - Low */ 65 #define REG_TMR_RLD0 0x318 /* RW Wake up Timer Value Register - High */ 66 #define REG_TMR_RLD1 0x319 /* RW Wake up Timer Value Register - Low */ 67 #define REG_TMR_CTRL 0x31A /* RW Wake up Timer Timeout flag */ 68 #define REG_PD_AUX 0x31E /* RW Battmon enable */ 69 #define REG_GP_CFG 0x32C /* RW GPIO Configuration */ 70 #define REG_GP_OUT 0x32D /* RW GPIO Configuration */ 71 #define REG_GP_IN 0x32E /* R GPIO Configuration */ 72 #define REG_SYNT 0x335 /* RW bandwidth calibration timers */ 73 #define REG_CAL_CFG 0x33D /* RW Calibration Settings */ 74 #define REG_PA_BIAS 0x36E /* RW PA BIAS */ 75 #define REG_SYNT_CAL 0x371 /* RW Oscillator and Doubler Configuration */ 76 #define REG_IIRF_CFG 0x389 /* RW BB Filter Decimation Rate */ 77 #define REG_CDR_CFG 0x38A /* RW CDR kVCO */ 78 #define REG_DM_CFG1 0x38B /* RW Postdemodulator Filter */ 79 #define REG_AGCSTAT 0x38E /* R RXBB Ref Osc Calibration Engine Readback */ 80 #define REG_RXCAL0 0x395 /* RW RX BB filter tuning, LSB */ 81 #define REG_RXCAL1 0x396 /* RW RX BB filter tuning, MSB */ 82 #define REG_RXFE_CFG 0x39B /* RW RXBB Ref Osc & RXFE Calibration */ 83 #define REG_PA_RR 0x3A7 /* RW Set PA ramp rate */ 84 #define REG_PA_CFG 0x3A8 /* RW PA enable */ 85 #define REG_EXTPA_CFG 0x3A9 /* RW External PA BIAS DAC */ 86 #define REG_EXTPA_MSC 0x3AA /* RW PA Bias Mode */ 87 #define REG_ADC_RBK 0x3AE /* R Readback temp */ 88 #define REG_AGC_CFG1 0x3B2 /* RW GC Parameters */ 89 #define REG_AGC_MAX 0x3B4 /* RW Slew rate */ 90 #define REG_AGC_CFG2 0x3B6 /* RW RSSI Parameters */ 91 #define REG_AGC_CFG3 0x3B7 /* RW RSSI Parameters */ 92 #define REG_AGC_CFG4 0x3B8 /* RW RSSI Parameters */ 93 #define REG_AGC_CFG5 0x3B9 /* RW RSSI & NDEC Parameters */ 94 #define REG_AGC_CFG6 0x3BA /* RW NDEC Parameters */ 95 #define REG_OCL_CFG1 0x3C4 /* RW OCL System Parameters */ 96 #define REG_IRQ1_EN0 0x3C7 /* RW Interrupt Mask set bits for IRQ1 */ 97 #define REG_IRQ1_EN1 0x3C8 /* RW Interrupt Mask set bits for IRQ1 */ 98 #define REG_IRQ2_EN0 0x3C9 /* RW Interrupt Mask set bits for IRQ2 */ 99 #define REG_IRQ2_EN1 0x3CA /* RW Interrupt Mask set bits for IRQ2 */ 100 #define REG_IRQ1_SRC0 0x3CB /* RW Interrupt Source bits for IRQ */ 101 #define REG_IRQ1_SRC1 0x3CC /* RW Interrupt Source bits for IRQ */ 102 #define REG_OCL_BW0 0x3D2 /* RW OCL System Parameters */ 103 #define REG_OCL_BW1 0x3D3 /* RW OCL System Parameters */ 104 #define REG_OCL_BW2 0x3D4 /* RW OCL System Parameters */ 105 #define REG_OCL_BW3 0x3D5 /* RW OCL System Parameters */ 106 #define REG_OCL_BW4 0x3D6 /* RW OCL System Parameters */ 107 #define REG_OCL_BWS 0x3D7 /* RW OCL System Parameters */ 108 #define REG_OCL_CFG13 0x3E0 /* RW OCL System Parameters */ 109 #define REG_GP_DRV 0x3E3 /* RW I/O pads Configuration and bg trim */ 110 #define REG_BM_CFG 0x3E6 /* RW Batt. Monitor Threshold Voltage setting */ 111 #define REG_SFD_15_4 0x3F4 /* RW Option to set non standard SFD */ 112 #define REG_AFC_CFG 0x3F7 /* RW AFC mode and polarity */ 113 #define REG_AFC_KI_KP 0x3F8 /* RW AFC ki and kp */ 114 #define REG_AFC_RANGE 0x3F9 /* RW AFC range */ 115 #define REG_AFC_READ 0x3FA /* RW Readback frequency error */ 116 117 /* REG_EXTPA_MSC */ 118 #define PA_PWR(x) (((x) & 0xF) << 4) 119 #define EXTPA_BIAS_SRC BIT(3) 120 #define EXTPA_BIAS_MODE(x) (((x) & 0x7) << 0) 121 122 /* REG_PA_CFG */ 123 #define PA_BRIDGE_DBIAS(x) (((x) & 0x1F) << 0) 124 #define PA_DBIAS_HIGH_POWER 21 125 #define PA_DBIAS_LOW_POWER 13 126 127 /* REG_PA_BIAS */ 128 #define PA_BIAS_CTRL(x) (((x) & 0x1F) << 1) 129 #define REG_PA_BIAS_DFL BIT(0) 130 #define PA_BIAS_HIGH_POWER 63 131 #define PA_BIAS_LOW_POWER 55 132 133 #define REG_PAN_ID0 0x112 134 #define REG_PAN_ID1 0x113 135 #define REG_SHORT_ADDR_0 0x114 136 #define REG_SHORT_ADDR_1 0x115 137 #define REG_IEEE_ADDR_0 0x116 138 #define REG_IEEE_ADDR_1 0x117 139 #define REG_IEEE_ADDR_2 0x118 140 #define REG_IEEE_ADDR_3 0x119 141 #define REG_IEEE_ADDR_4 0x11A 142 #define REG_IEEE_ADDR_5 0x11B 143 #define REG_IEEE_ADDR_6 0x11C 144 #define REG_IEEE_ADDR_7 0x11D 145 #define REG_FFILT_CFG 0x11E 146 #define REG_AUTO_CFG 0x11F 147 #define REG_AUTO_TX1 0x120 148 #define REG_AUTO_TX2 0x121 149 #define REG_AUTO_STATUS 0x122 150 151 /* REG_FFILT_CFG */ 152 #define ACCEPT_BEACON_FRAMES BIT(0) 153 #define ACCEPT_DATA_FRAMES BIT(1) 154 #define ACCEPT_ACK_FRAMES BIT(2) 155 #define ACCEPT_MACCMD_FRAMES BIT(3) 156 #define ACCEPT_RESERVED_FRAMES BIT(4) 157 #define ACCEPT_ALL_ADDRESS BIT(5) 158 159 /* REG_AUTO_CFG */ 160 #define AUTO_ACK_FRAMEPEND BIT(0) 161 #define IS_PANCOORD BIT(1) 162 #define RX_AUTO_ACK_EN BIT(3) 163 #define CSMA_CA_RX_TURNAROUND BIT(4) 164 165 /* REG_AUTO_TX1 */ 166 #define MAX_FRAME_RETRIES(x) ((x) & 0xF) 167 #define MAX_CCA_RETRIES(x) (((x) & 0x7) << 4) 168 169 /* REG_AUTO_TX2 */ 170 #define CSMA_MAX_BE(x) ((x) & 0xF) 171 #define CSMA_MIN_BE(x) (((x) & 0xF) << 4) 172 173 #define CMD_SPI_NOP 0xFF /* No operation. Use for dummy writes */ 174 #define CMD_SPI_PKT_WR 0x10 /* Write telegram to the Packet RAM 175 * starting from the TX packet base address 176 * pointer tx_packet_base 177 */ 178 #define CMD_SPI_PKT_RD 0x30 /* Read telegram from the Packet RAM 179 * starting from RX packet base address 180 * pointer rxpb.rx_packet_base 181 */ 182 #define CMD_SPI_MEM_WR(x) (0x18 + (x >> 8)) /* Write data to MCR or 183 * Packet RAM sequentially 184 */ 185 #define CMD_SPI_MEM_RD(x) (0x38 + (x >> 8)) /* Read data from MCR or 186 * Packet RAM sequentially 187 */ 188 #define CMD_SPI_MEMR_WR(x) (0x08 + (x >> 8)) /* Write data to MCR or Packet 189 * RAM as random block 190 */ 191 #define CMD_SPI_MEMR_RD(x) (0x28 + (x >> 8)) /* Read data from MCR or 192 * Packet RAM random block 193 */ 194 #define CMD_SPI_PRAM_WR 0x1E /* Write data sequentially to current 195 * PRAM page selected 196 */ 197 #define CMD_SPI_PRAM_RD 0x3E /* Read data sequentially from current 198 * PRAM page selected 199 */ 200 #define CMD_RC_SLEEP 0xB1 /* Invoke transition of radio controller 201 * into SLEEP state 202 */ 203 #define CMD_RC_IDLE 0xB2 /* Invoke transition of radio controller 204 * into IDLE state 205 */ 206 #define CMD_RC_PHY_RDY 0xB3 /* Invoke transition of radio controller 207 * into PHY_RDY state 208 */ 209 #define CMD_RC_RX 0xB4 /* Invoke transition of radio controller 210 * into RX state 211 */ 212 #define CMD_RC_TX 0xB5 /* Invoke transition of radio controller 213 * into TX state 214 */ 215 #define CMD_RC_MEAS 0xB6 /* Invoke transition of radio controller 216 * into MEAS state 217 */ 218 #define CMD_RC_CCA 0xB7 /* Invoke Clear channel assessment */ 219 #define CMD_RC_CSMACA 0xC1 /* initiates CSMA-CA channel access 220 * sequence and frame transmission 221 */ 222 #define CMD_RC_PC_RESET 0xC7 /* Program counter reset */ 223 #define CMD_RC_RESET 0xC8 /* Resets the ADF7242 and puts it in 224 * the sleep state 225 */ 226 #define CMD_RC_PC_RESET_NO_WAIT (CMD_RC_PC_RESET | BIT(31)) 227 228 /* STATUS */ 229 230 #define STAT_SPI_READY BIT(7) 231 #define STAT_IRQ_STATUS BIT(6) 232 #define STAT_RC_READY BIT(5) 233 #define STAT_CCA_RESULT BIT(4) 234 #define RC_STATUS_IDLE 1 235 #define RC_STATUS_MEAS 2 236 #define RC_STATUS_PHY_RDY 3 237 #define RC_STATUS_RX 4 238 #define RC_STATUS_TX 5 239 #define RC_STATUS_MASK 0xF 240 241 /* AUTO_STATUS */ 242 243 #define SUCCESS 0 244 #define SUCCESS_DATPEND 1 245 #define FAILURE_CSMACA 2 246 #define FAILURE_NOACK 3 247 #define AUTO_STATUS_MASK 0x3 248 249 #define PRAM_PAGESIZE 256 250 251 /* IRQ1 */ 252 253 #define IRQ_CCA_COMPLETE BIT(0) 254 #define IRQ_SFD_RX BIT(1) 255 #define IRQ_SFD_TX BIT(2) 256 #define IRQ_RX_PKT_RCVD BIT(3) 257 #define IRQ_TX_PKT_SENT BIT(4) 258 #define IRQ_FRAME_VALID BIT(5) 259 #define IRQ_ADDRESS_VALID BIT(6) 260 #define IRQ_CSMA_CA BIT(7) 261 262 #define AUTO_TX_TURNAROUND BIT(3) 263 #define ADDON_EN BIT(4) 264 265 #define FLAG_XMIT 0 266 #define FLAG_START 1 267 268 #define ADF7242_REPORT_CSMA_CA_STAT 0 /* framework doesn't handle yet */ 269 270 struct adf7242_local { 271 struct spi_device *spi; 272 struct completion tx_complete; 273 struct ieee802154_hw *hw; 274 struct mutex bmux; /* protect SPI messages */ 275 struct spi_message stat_msg; 276 struct spi_transfer stat_xfer; 277 struct dentry *debugfs_root; 278 struct delayed_work work; 279 struct workqueue_struct *wqueue; 280 unsigned long flags; 281 int tx_stat; 282 bool promiscuous; 283 s8 rssi; 284 u8 max_frame_retries; 285 u8 max_cca_retries; 286 u8 max_be; 287 u8 min_be; 288 289 /* DMA (thus cache coherency maintenance) requires the 290 * transfer buffers to live in their own cache lines. 291 */ 292 293 u8 buf[3] ____cacheline_aligned; 294 u8 buf_reg_tx[3]; 295 u8 buf_read_tx[4]; 296 u8 buf_read_rx[4]; 297 u8 buf_stat_rx; 298 u8 buf_stat_tx; 299 u8 buf_cmd; 300 }; 301 302 static int adf7242_soft_reset(struct adf7242_local *lp, int line); 303 304 static int adf7242_status(struct adf7242_local *lp, u8 *stat) 305 { 306 int status; 307 308 mutex_lock(&lp->bmux); 309 status = spi_sync(lp->spi, &lp->stat_msg); 310 *stat = lp->buf_stat_rx; 311 mutex_unlock(&lp->bmux); 312 313 return status; 314 } 315 316 static int adf7242_wait_status(struct adf7242_local *lp, unsigned int status, 317 unsigned int mask, int line) 318 { 319 int cnt = 0, ret = 0; 320 u8 stat; 321 322 do { 323 adf7242_status(lp, &stat); 324 cnt++; 325 } while (((stat & mask) != status) && (cnt < MAX_POLL_LOOPS)); 326 327 if (cnt >= MAX_POLL_LOOPS) { 328 ret = -ETIMEDOUT; 329 330 if (!(stat & STAT_RC_READY)) { 331 adf7242_soft_reset(lp, line); 332 adf7242_status(lp, &stat); 333 334 if ((stat & mask) == status) 335 ret = 0; 336 } 337 338 if (ret < 0) 339 dev_warn(&lp->spi->dev, 340 "%s:line %d Timeout status 0x%x (%d)\n", 341 __func__, line, stat, cnt); 342 } 343 344 dev_vdbg(&lp->spi->dev, "%s : loops=%d line %d\n", __func__, cnt, line); 345 346 return ret; 347 } 348 349 static int adf7242_wait_rc_ready(struct adf7242_local *lp, int line) 350 { 351 return adf7242_wait_status(lp, STAT_RC_READY | STAT_SPI_READY, 352 STAT_RC_READY | STAT_SPI_READY, line); 353 } 354 355 static int adf7242_wait_spi_ready(struct adf7242_local *lp, int line) 356 { 357 return adf7242_wait_status(lp, STAT_SPI_READY, 358 STAT_SPI_READY, line); 359 } 360 361 static int adf7242_write_fbuf(struct adf7242_local *lp, u8 *data, u8 len) 362 { 363 u8 *buf = lp->buf; 364 int status; 365 struct spi_message msg; 366 struct spi_transfer xfer_head = { 367 .len = 2, 368 .tx_buf = buf, 369 370 }; 371 struct spi_transfer xfer_buf = { 372 .len = len, 373 .tx_buf = data, 374 }; 375 376 spi_message_init(&msg); 377 spi_message_add_tail(&xfer_head, &msg); 378 spi_message_add_tail(&xfer_buf, &msg); 379 380 adf7242_wait_spi_ready(lp, __LINE__); 381 382 mutex_lock(&lp->bmux); 383 buf[0] = CMD_SPI_PKT_WR; 384 buf[1] = len + 2; 385 386 status = spi_sync(lp->spi, &msg); 387 mutex_unlock(&lp->bmux); 388 389 return status; 390 } 391 392 static int adf7242_read_fbuf(struct adf7242_local *lp, 393 u8 *data, size_t len, bool packet_read) 394 { 395 u8 *buf = lp->buf; 396 int status; 397 struct spi_message msg; 398 struct spi_transfer xfer_head = { 399 .len = 3, 400 .tx_buf = buf, 401 .rx_buf = buf, 402 }; 403 struct spi_transfer xfer_buf = { 404 .len = len, 405 .rx_buf = data, 406 }; 407 408 spi_message_init(&msg); 409 spi_message_add_tail(&xfer_head, &msg); 410 spi_message_add_tail(&xfer_buf, &msg); 411 412 adf7242_wait_spi_ready(lp, __LINE__); 413 414 mutex_lock(&lp->bmux); 415 if (packet_read) { 416 buf[0] = CMD_SPI_PKT_RD; 417 buf[1] = CMD_SPI_NOP; 418 buf[2] = 0; /* PHR */ 419 } else { 420 buf[0] = CMD_SPI_PRAM_RD; 421 buf[1] = 0; 422 buf[2] = CMD_SPI_NOP; 423 } 424 425 status = spi_sync(lp->spi, &msg); 426 427 mutex_unlock(&lp->bmux); 428 429 return status; 430 } 431 432 static int adf7242_read_reg(struct adf7242_local *lp, u16 addr, u8 *data) 433 { 434 int status; 435 struct spi_message msg; 436 437 struct spi_transfer xfer = { 438 .len = 4, 439 .tx_buf = lp->buf_read_tx, 440 .rx_buf = lp->buf_read_rx, 441 }; 442 443 adf7242_wait_spi_ready(lp, __LINE__); 444 445 mutex_lock(&lp->bmux); 446 lp->buf_read_tx[0] = CMD_SPI_MEM_RD(addr); 447 lp->buf_read_tx[1] = addr; 448 lp->buf_read_tx[2] = CMD_SPI_NOP; 449 lp->buf_read_tx[3] = CMD_SPI_NOP; 450 451 spi_message_init(&msg); 452 spi_message_add_tail(&xfer, &msg); 453 454 status = spi_sync(lp->spi, &msg); 455 if (msg.status) 456 status = msg.status; 457 458 if (!status) 459 *data = lp->buf_read_rx[3]; 460 461 mutex_unlock(&lp->bmux); 462 463 dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", __func__, 464 addr, *data); 465 466 return status; 467 } 468 469 static int adf7242_write_reg(struct adf7242_local *lp, u16 addr, u8 data) 470 { 471 int status; 472 473 adf7242_wait_spi_ready(lp, __LINE__); 474 475 mutex_lock(&lp->bmux); 476 lp->buf_reg_tx[0] = CMD_SPI_MEM_WR(addr); 477 lp->buf_reg_tx[1] = addr; 478 lp->buf_reg_tx[2] = data; 479 status = spi_write(lp->spi, lp->buf_reg_tx, 3); 480 mutex_unlock(&lp->bmux); 481 482 dev_vdbg(&lp->spi->dev, "%s : REG 0x%X, VAL 0x%X\n", 483 __func__, addr, data); 484 485 return status; 486 } 487 488 static int adf7242_cmd(struct adf7242_local *lp, unsigned int cmd) 489 { 490 int status; 491 492 dev_vdbg(&lp->spi->dev, "%s : CMD=0x%X\n", __func__, cmd); 493 494 if (cmd != CMD_RC_PC_RESET_NO_WAIT) 495 adf7242_wait_rc_ready(lp, __LINE__); 496 497 mutex_lock(&lp->bmux); 498 lp->buf_cmd = cmd; 499 status = spi_write(lp->spi, &lp->buf_cmd, 1); 500 mutex_unlock(&lp->bmux); 501 502 return status; 503 } 504 505 static int adf7242_upload_firmware(struct adf7242_local *lp, u8 *data, u16 len) 506 { 507 struct spi_message msg; 508 struct spi_transfer xfer_buf = { }; 509 int status, i, page = 0; 510 u8 *buf = lp->buf; 511 512 struct spi_transfer xfer_head = { 513 .len = 2, 514 .tx_buf = buf, 515 }; 516 517 buf[0] = CMD_SPI_PRAM_WR; 518 buf[1] = 0; 519 520 spi_message_init(&msg); 521 spi_message_add_tail(&xfer_head, &msg); 522 spi_message_add_tail(&xfer_buf, &msg); 523 524 for (i = len; i >= 0; i -= PRAM_PAGESIZE) { 525 adf7242_write_reg(lp, REG_PRAMPG, page); 526 527 xfer_buf.len = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i; 528 xfer_buf.tx_buf = &data[page * PRAM_PAGESIZE]; 529 530 mutex_lock(&lp->bmux); 531 status = spi_sync(lp->spi, &msg); 532 mutex_unlock(&lp->bmux); 533 page++; 534 } 535 536 return status; 537 } 538 539 static int adf7242_verify_firmware(struct adf7242_local *lp, 540 const u8 *data, size_t len) 541 { 542 #ifdef DEBUG 543 int i, j; 544 unsigned int page; 545 u8 *buf = kmalloc(PRAM_PAGESIZE, GFP_KERNEL); 546 547 if (!buf) 548 return -ENOMEM; 549 550 for (page = 0, i = len; i >= 0; i -= PRAM_PAGESIZE, page++) { 551 size_t nb = (i >= PRAM_PAGESIZE) ? PRAM_PAGESIZE : i; 552 553 adf7242_write_reg(lp, REG_PRAMPG, page); 554 adf7242_read_fbuf(lp, buf, nb, false); 555 556 for (j = 0; j < nb; j++) { 557 if (buf[j] != data[page * PRAM_PAGESIZE + j]) { 558 kfree(buf); 559 return -EIO; 560 } 561 } 562 } 563 kfree(buf); 564 #endif 565 return 0; 566 } 567 568 static void adf7242_clear_irqstat(struct adf7242_local *lp) 569 { 570 adf7242_write_reg(lp, REG_IRQ1_SRC1, IRQ_CCA_COMPLETE | IRQ_SFD_RX | 571 IRQ_SFD_TX | IRQ_RX_PKT_RCVD | IRQ_TX_PKT_SENT | 572 IRQ_FRAME_VALID | IRQ_ADDRESS_VALID | IRQ_CSMA_CA); 573 } 574 575 static int adf7242_cmd_rx(struct adf7242_local *lp) 576 { 577 /* Wait until the ACK is sent */ 578 adf7242_wait_status(lp, RC_STATUS_PHY_RDY, RC_STATUS_MASK, __LINE__); 579 adf7242_clear_irqstat(lp); 580 mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400)); 581 582 return adf7242_cmd(lp, CMD_RC_RX); 583 } 584 585 static void adf7242_rx_cal_work(struct work_struct *work) 586 { 587 struct adf7242_local *lp = 588 container_of(work, struct adf7242_local, work.work); 589 590 /* Reissuing RC_RX every 400ms - to adjust for offset 591 * drift in receiver (datasheet page 61, OCL section) 592 */ 593 594 if (!test_bit(FLAG_XMIT, &lp->flags)) { 595 adf7242_cmd(lp, CMD_RC_PHY_RDY); 596 adf7242_cmd_rx(lp); 597 } 598 } 599 600 static int adf7242_set_txpower(struct ieee802154_hw *hw, int mbm) 601 { 602 struct adf7242_local *lp = hw->priv; 603 u8 pwr, bias_ctrl, dbias, tmp; 604 int db = mbm / 100; 605 606 dev_vdbg(&lp->spi->dev, "%s : Power %d dB\n", __func__, db); 607 608 if (db > 5 || db < -26) 609 return -EINVAL; 610 611 db = DIV_ROUND_CLOSEST(db + 29, 2); 612 613 if (db > 15) { 614 dbias = PA_DBIAS_HIGH_POWER; 615 bias_ctrl = PA_BIAS_HIGH_POWER; 616 } else { 617 dbias = PA_DBIAS_LOW_POWER; 618 bias_ctrl = PA_BIAS_LOW_POWER; 619 } 620 621 pwr = clamp_t(u8, db, 3, 15); 622 623 adf7242_read_reg(lp, REG_PA_CFG, &tmp); 624 tmp &= ~PA_BRIDGE_DBIAS(~0); 625 tmp |= PA_BRIDGE_DBIAS(dbias); 626 adf7242_write_reg(lp, REG_PA_CFG, tmp); 627 628 adf7242_read_reg(lp, REG_PA_BIAS, &tmp); 629 tmp &= ~PA_BIAS_CTRL(~0); 630 tmp |= PA_BIAS_CTRL(bias_ctrl); 631 adf7242_write_reg(lp, REG_PA_BIAS, tmp); 632 633 adf7242_read_reg(lp, REG_EXTPA_MSC, &tmp); 634 tmp &= ~PA_PWR(~0); 635 tmp |= PA_PWR(pwr); 636 637 return adf7242_write_reg(lp, REG_EXTPA_MSC, tmp); 638 } 639 640 static int adf7242_set_csma_params(struct ieee802154_hw *hw, u8 min_be, 641 u8 max_be, u8 retries) 642 { 643 struct adf7242_local *lp = hw->priv; 644 int ret; 645 646 dev_vdbg(&lp->spi->dev, "%s : min_be=%d max_be=%d retries=%d\n", 647 __func__, min_be, max_be, retries); 648 649 if (min_be > max_be || max_be > 8 || retries > 5) 650 return -EINVAL; 651 652 ret = adf7242_write_reg(lp, REG_AUTO_TX1, 653 MAX_FRAME_RETRIES(lp->max_frame_retries) | 654 MAX_CCA_RETRIES(retries)); 655 if (ret) 656 return ret; 657 658 lp->max_cca_retries = retries; 659 lp->max_be = max_be; 660 lp->min_be = min_be; 661 662 return adf7242_write_reg(lp, REG_AUTO_TX2, CSMA_MAX_BE(max_be) | 663 CSMA_MIN_BE(min_be)); 664 } 665 666 static int adf7242_set_frame_retries(struct ieee802154_hw *hw, s8 retries) 667 { 668 struct adf7242_local *lp = hw->priv; 669 int ret = 0; 670 671 dev_vdbg(&lp->spi->dev, "%s : Retries = %d\n", __func__, retries); 672 673 if (retries < -1 || retries > 15) 674 return -EINVAL; 675 676 if (retries >= 0) 677 ret = adf7242_write_reg(lp, REG_AUTO_TX1, 678 MAX_FRAME_RETRIES(retries) | 679 MAX_CCA_RETRIES(lp->max_cca_retries)); 680 681 lp->max_frame_retries = retries; 682 683 return ret; 684 } 685 686 static int adf7242_ed(struct ieee802154_hw *hw, u8 *level) 687 { 688 struct adf7242_local *lp = hw->priv; 689 690 *level = lp->rssi; 691 692 dev_vdbg(&lp->spi->dev, "%s :Exit level=%d\n", 693 __func__, *level); 694 695 return 0; 696 } 697 698 static int adf7242_start(struct ieee802154_hw *hw) 699 { 700 struct adf7242_local *lp = hw->priv; 701 702 adf7242_cmd(lp, CMD_RC_PHY_RDY); 703 adf7242_clear_irqstat(lp); 704 enable_irq(lp->spi->irq); 705 set_bit(FLAG_START, &lp->flags); 706 707 return adf7242_cmd_rx(lp); 708 } 709 710 static void adf7242_stop(struct ieee802154_hw *hw) 711 { 712 struct adf7242_local *lp = hw->priv; 713 714 disable_irq(lp->spi->irq); 715 cancel_delayed_work_sync(&lp->work); 716 adf7242_cmd(lp, CMD_RC_IDLE); 717 clear_bit(FLAG_START, &lp->flags); 718 adf7242_clear_irqstat(lp); 719 } 720 721 static int adf7242_channel(struct ieee802154_hw *hw, u8 page, u8 channel) 722 { 723 struct adf7242_local *lp = hw->priv; 724 unsigned long freq; 725 726 dev_dbg(&lp->spi->dev, "%s :Channel=%d\n", __func__, channel); 727 728 might_sleep(); 729 730 WARN_ON(page != 0); 731 WARN_ON(channel < 11); 732 WARN_ON(channel > 26); 733 734 freq = (2405 + 5 * (channel - 11)) * 100; 735 adf7242_cmd(lp, CMD_RC_PHY_RDY); 736 737 adf7242_write_reg(lp, REG_CH_FREQ0, freq); 738 adf7242_write_reg(lp, REG_CH_FREQ1, freq >> 8); 739 adf7242_write_reg(lp, REG_CH_FREQ2, freq >> 16); 740 741 if (test_bit(FLAG_START, &lp->flags)) 742 return adf7242_cmd_rx(lp); 743 else 744 return adf7242_cmd(lp, CMD_RC_PHY_RDY); 745 } 746 747 static int adf7242_set_hw_addr_filt(struct ieee802154_hw *hw, 748 struct ieee802154_hw_addr_filt *filt, 749 unsigned long changed) 750 { 751 struct adf7242_local *lp = hw->priv; 752 u8 reg; 753 754 dev_dbg(&lp->spi->dev, "%s :Changed=0x%lX\n", __func__, changed); 755 756 might_sleep(); 757 758 if (changed & IEEE802154_AFILT_IEEEADDR_CHANGED) { 759 u8 addr[8], i; 760 761 memcpy(addr, &filt->ieee_addr, 8); 762 763 for (i = 0; i < 8; i++) 764 adf7242_write_reg(lp, REG_IEEE_ADDR_0 + i, addr[i]); 765 } 766 767 if (changed & IEEE802154_AFILT_SADDR_CHANGED) { 768 u16 saddr = le16_to_cpu(filt->short_addr); 769 770 adf7242_write_reg(lp, REG_SHORT_ADDR_0, saddr); 771 adf7242_write_reg(lp, REG_SHORT_ADDR_1, saddr >> 8); 772 } 773 774 if (changed & IEEE802154_AFILT_PANID_CHANGED) { 775 u16 pan_id = le16_to_cpu(filt->pan_id); 776 777 adf7242_write_reg(lp, REG_PAN_ID0, pan_id); 778 adf7242_write_reg(lp, REG_PAN_ID1, pan_id >> 8); 779 } 780 781 if (changed & IEEE802154_AFILT_PANC_CHANGED) { 782 adf7242_read_reg(lp, REG_AUTO_CFG, ®); 783 if (filt->pan_coord) 784 reg |= IS_PANCOORD; 785 else 786 reg &= ~IS_PANCOORD; 787 adf7242_write_reg(lp, REG_AUTO_CFG, reg); 788 } 789 790 return 0; 791 } 792 793 static int adf7242_set_promiscuous_mode(struct ieee802154_hw *hw, bool on) 794 { 795 struct adf7242_local *lp = hw->priv; 796 797 dev_dbg(&lp->spi->dev, "%s : mode %d\n", __func__, on); 798 799 lp->promiscuous = on; 800 801 if (on) { 802 adf7242_write_reg(lp, REG_AUTO_CFG, 0); 803 return adf7242_write_reg(lp, REG_FFILT_CFG, 804 ACCEPT_BEACON_FRAMES | 805 ACCEPT_DATA_FRAMES | 806 ACCEPT_MACCMD_FRAMES | 807 ACCEPT_ALL_ADDRESS | 808 ACCEPT_ACK_FRAMES | 809 ACCEPT_RESERVED_FRAMES); 810 } else { 811 adf7242_write_reg(lp, REG_FFILT_CFG, 812 ACCEPT_BEACON_FRAMES | 813 ACCEPT_DATA_FRAMES | 814 ACCEPT_MACCMD_FRAMES | 815 ACCEPT_RESERVED_FRAMES); 816 817 return adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN); 818 } 819 } 820 821 static int adf7242_set_cca_ed_level(struct ieee802154_hw *hw, s32 mbm) 822 { 823 struct adf7242_local *lp = hw->priv; 824 s8 level = clamp_t(s8, mbm / 100, S8_MIN, S8_MAX); 825 826 dev_dbg(&lp->spi->dev, "%s : level %d\n", __func__, level); 827 828 return adf7242_write_reg(lp, REG_CCA1, level); 829 } 830 831 static int adf7242_xmit(struct ieee802154_hw *hw, struct sk_buff *skb) 832 { 833 struct adf7242_local *lp = hw->priv; 834 int ret; 835 836 /* ensure existing instances of the IRQ handler have completed */ 837 disable_irq(lp->spi->irq); 838 set_bit(FLAG_XMIT, &lp->flags); 839 cancel_delayed_work_sync(&lp->work); 840 reinit_completion(&lp->tx_complete); 841 adf7242_cmd(lp, CMD_RC_PHY_RDY); 842 adf7242_clear_irqstat(lp); 843 844 ret = adf7242_write_fbuf(lp, skb->data, skb->len); 845 if (ret) 846 goto err; 847 848 ret = adf7242_cmd(lp, CMD_RC_CSMACA); 849 if (ret) 850 goto err; 851 enable_irq(lp->spi->irq); 852 853 ret = wait_for_completion_interruptible_timeout(&lp->tx_complete, 854 HZ / 10); 855 if (ret < 0) 856 goto err; 857 if (ret == 0) { 858 dev_dbg(&lp->spi->dev, "Timeout waiting for TX interrupt\n"); 859 ret = -ETIMEDOUT; 860 goto err; 861 } 862 863 if (lp->tx_stat != SUCCESS) { 864 dev_dbg(&lp->spi->dev, 865 "Error xmit: Retry count exceeded Status=0x%x\n", 866 lp->tx_stat); 867 ret = -ECOMM; 868 } else { 869 ret = 0; 870 } 871 872 err: 873 clear_bit(FLAG_XMIT, &lp->flags); 874 adf7242_cmd_rx(lp); 875 876 return ret; 877 } 878 879 static int adf7242_rx(struct adf7242_local *lp) 880 { 881 struct sk_buff *skb; 882 size_t len; 883 int ret; 884 u8 lqi, len_u8, *data; 885 886 adf7242_read_reg(lp, 0, &len_u8); 887 888 len = len_u8; 889 890 if (!ieee802154_is_valid_psdu_len(len)) { 891 dev_dbg(&lp->spi->dev, 892 "corrupted frame received len %d\n", (int)len); 893 len = IEEE802154_MTU; 894 } 895 896 skb = dev_alloc_skb(len); 897 if (!skb) { 898 adf7242_cmd_rx(lp); 899 return -ENOMEM; 900 } 901 902 data = skb_put(skb, len); 903 ret = adf7242_read_fbuf(lp, data, len, true); 904 if (ret < 0) { 905 kfree_skb(skb); 906 adf7242_cmd_rx(lp); 907 return ret; 908 } 909 910 lqi = data[len - 2]; 911 lp->rssi = data[len - 1]; 912 913 ret = adf7242_cmd_rx(lp); 914 915 skb_trim(skb, len - 2); /* Don't put RSSI/LQI or CRC into the frame */ 916 917 ieee802154_rx_irqsafe(lp->hw, skb, lqi); 918 919 dev_dbg(&lp->spi->dev, "%s: ret=%d len=%d lqi=%d rssi=%d\n", 920 __func__, ret, (int)len, (int)lqi, lp->rssi); 921 922 return ret; 923 } 924 925 static const struct ieee802154_ops adf7242_ops = { 926 .owner = THIS_MODULE, 927 .xmit_sync = adf7242_xmit, 928 .ed = adf7242_ed, 929 .set_channel = adf7242_channel, 930 .set_hw_addr_filt = adf7242_set_hw_addr_filt, 931 .start = adf7242_start, 932 .stop = adf7242_stop, 933 .set_csma_params = adf7242_set_csma_params, 934 .set_frame_retries = adf7242_set_frame_retries, 935 .set_txpower = adf7242_set_txpower, 936 .set_promiscuous_mode = adf7242_set_promiscuous_mode, 937 .set_cca_ed_level = adf7242_set_cca_ed_level, 938 }; 939 940 static void adf7242_debug(struct adf7242_local *lp, u8 irq1) 941 { 942 #ifdef DEBUG 943 u8 stat; 944 945 adf7242_status(lp, &stat); 946 947 dev_dbg(&lp->spi->dev, "%s IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n", 948 __func__, irq1, 949 irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "", 950 irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "", 951 irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "", 952 irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "", 953 irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "", 954 irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "", 955 irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "", 956 irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : ""); 957 958 dev_dbg(&lp->spi->dev, "%s STATUS = %X:\n%s\n%s\n%s\n%s\n%s%s%s%s%s\n", 959 __func__, stat, 960 stat & STAT_SPI_READY ? "SPI_READY" : "SPI_BUSY", 961 stat & STAT_IRQ_STATUS ? "IRQ_PENDING" : "IRQ_CLEAR", 962 stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY", 963 stat & STAT_CCA_RESULT ? "CHAN_IDLE" : "CHAN_BUSY", 964 (stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "", 965 (stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "", 966 (stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "", 967 (stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "", 968 (stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : ""); 969 #endif 970 } 971 972 static irqreturn_t adf7242_isr(int irq, void *data) 973 { 974 struct adf7242_local *lp = data; 975 unsigned int xmit; 976 u8 irq1; 977 978 mod_delayed_work(lp->wqueue, &lp->work, msecs_to_jiffies(400)); 979 adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1); 980 981 if (!(irq1 & (IRQ_RX_PKT_RCVD | IRQ_CSMA_CA))) 982 dev_err(&lp->spi->dev, "%s :ERROR IRQ1 = 0x%X\n", 983 __func__, irq1); 984 985 adf7242_debug(lp, irq1); 986 987 xmit = test_bit(FLAG_XMIT, &lp->flags); 988 989 if (xmit && (irq1 & IRQ_CSMA_CA)) { 990 adf7242_wait_status(lp, RC_STATUS_PHY_RDY, 991 RC_STATUS_MASK, __LINE__); 992 993 if (ADF7242_REPORT_CSMA_CA_STAT) { 994 u8 astat; 995 996 adf7242_read_reg(lp, REG_AUTO_STATUS, &astat); 997 astat &= AUTO_STATUS_MASK; 998 999 dev_dbg(&lp->spi->dev, "AUTO_STATUS = %X:\n%s%s%s%s\n", 1000 astat, 1001 astat == SUCCESS ? "SUCCESS" : "", 1002 astat == 1003 SUCCESS_DATPEND ? "SUCCESS_DATPEND" : "", 1004 astat == FAILURE_CSMACA ? "FAILURE_CSMACA" : "", 1005 astat == FAILURE_NOACK ? "FAILURE_NOACK" : ""); 1006 1007 /* save CSMA-CA completion status */ 1008 lp->tx_stat = astat; 1009 } else { 1010 lp->tx_stat = SUCCESS; 1011 } 1012 complete(&lp->tx_complete); 1013 adf7242_clear_irqstat(lp); 1014 } else if (!xmit && (irq1 & IRQ_RX_PKT_RCVD) && 1015 (irq1 & IRQ_FRAME_VALID)) { 1016 adf7242_rx(lp); 1017 } else if (!xmit && test_bit(FLAG_START, &lp->flags)) { 1018 /* Invalid packet received - drop it and restart */ 1019 dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X\n", 1020 __func__, __LINE__, irq1); 1021 adf7242_cmd(lp, CMD_RC_PHY_RDY); 1022 adf7242_cmd_rx(lp); 1023 } else { 1024 /* This can only be xmit without IRQ, likely a RX packet. 1025 * we get an TX IRQ shortly - do nothing or let the xmit 1026 * timeout handle this 1027 */ 1028 1029 dev_dbg(&lp->spi->dev, "%s:%d : ERROR IRQ1 = 0x%X, xmit %d\n", 1030 __func__, __LINE__, irq1, xmit); 1031 adf7242_wait_status(lp, RC_STATUS_PHY_RDY, 1032 RC_STATUS_MASK, __LINE__); 1033 complete(&lp->tx_complete); 1034 adf7242_clear_irqstat(lp); 1035 } 1036 1037 return IRQ_HANDLED; 1038 } 1039 1040 static int adf7242_soft_reset(struct adf7242_local *lp, int line) 1041 { 1042 dev_warn(&lp->spi->dev, "%s (line %d)\n", __func__, line); 1043 1044 if (test_bit(FLAG_START, &lp->flags)) 1045 disable_irq_nosync(lp->spi->irq); 1046 1047 adf7242_cmd(lp, CMD_RC_PC_RESET_NO_WAIT); 1048 usleep_range(200, 250); 1049 adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2)); 1050 adf7242_cmd(lp, CMD_RC_PHY_RDY); 1051 adf7242_set_promiscuous_mode(lp->hw, lp->promiscuous); 1052 adf7242_set_csma_params(lp->hw, lp->min_be, lp->max_be, 1053 lp->max_cca_retries); 1054 adf7242_clear_irqstat(lp); 1055 1056 if (test_bit(FLAG_START, &lp->flags)) { 1057 enable_irq(lp->spi->irq); 1058 return adf7242_cmd(lp, CMD_RC_RX); 1059 } 1060 1061 return 0; 1062 } 1063 1064 static int adf7242_hw_init(struct adf7242_local *lp) 1065 { 1066 int ret; 1067 const struct firmware *fw; 1068 1069 adf7242_cmd(lp, CMD_RC_RESET); 1070 adf7242_cmd(lp, CMD_RC_IDLE); 1071 1072 /* get ADF7242 addon firmware 1073 * build this driver as module 1074 * and place under /lib/firmware/adf7242_firmware.bin 1075 * or compile firmware into the kernel. 1076 */ 1077 ret = request_firmware(&fw, FIRMWARE, &lp->spi->dev); 1078 if (ret) { 1079 dev_err(&lp->spi->dev, 1080 "request_firmware() failed with %d\n", ret); 1081 return ret; 1082 } 1083 1084 ret = adf7242_upload_firmware(lp, (u8 *)fw->data, fw->size); 1085 if (ret) { 1086 dev_err(&lp->spi->dev, 1087 "upload firmware failed with %d\n", ret); 1088 release_firmware(fw); 1089 return ret; 1090 } 1091 1092 ret = adf7242_verify_firmware(lp, (u8 *)fw->data, fw->size); 1093 if (ret) { 1094 dev_err(&lp->spi->dev, 1095 "verify firmware failed with %d\n", ret); 1096 release_firmware(fw); 1097 return ret; 1098 } 1099 1100 adf7242_cmd(lp, CMD_RC_PC_RESET); 1101 1102 release_firmware(fw); 1103 1104 adf7242_write_reg(lp, REG_FFILT_CFG, 1105 ACCEPT_BEACON_FRAMES | 1106 ACCEPT_DATA_FRAMES | 1107 ACCEPT_MACCMD_FRAMES | 1108 ACCEPT_RESERVED_FRAMES); 1109 1110 adf7242_write_reg(lp, REG_AUTO_CFG, RX_AUTO_ACK_EN); 1111 1112 adf7242_write_reg(lp, REG_PKT_CFG, ADDON_EN | BIT(2)); 1113 1114 adf7242_write_reg(lp, REG_EXTPA_MSC, 0xF1); 1115 adf7242_write_reg(lp, REG_RXFE_CFG, 0x1D); 1116 1117 adf7242_write_reg(lp, REG_IRQ1_EN0, 0); 1118 adf7242_write_reg(lp, REG_IRQ1_EN1, IRQ_RX_PKT_RCVD | IRQ_CSMA_CA); 1119 1120 adf7242_clear_irqstat(lp); 1121 adf7242_write_reg(lp, REG_IRQ1_SRC0, 0xFF); 1122 1123 adf7242_cmd(lp, CMD_RC_IDLE); 1124 1125 return 0; 1126 } 1127 1128 static int adf7242_stats_show(struct seq_file *file, void *offset) 1129 { 1130 struct adf7242_local *lp = spi_get_drvdata(file->private); 1131 u8 stat, irq1; 1132 1133 adf7242_status(lp, &stat); 1134 adf7242_read_reg(lp, REG_IRQ1_SRC1, &irq1); 1135 1136 seq_printf(file, "IRQ1 = %X:\n%s%s%s%s%s%s%s%s\n", irq1, 1137 irq1 & IRQ_CCA_COMPLETE ? "IRQ_CCA_COMPLETE\n" : "", 1138 irq1 & IRQ_SFD_RX ? "IRQ_SFD_RX\n" : "", 1139 irq1 & IRQ_SFD_TX ? "IRQ_SFD_TX\n" : "", 1140 irq1 & IRQ_RX_PKT_RCVD ? "IRQ_RX_PKT_RCVD\n" : "", 1141 irq1 & IRQ_TX_PKT_SENT ? "IRQ_TX_PKT_SENT\n" : "", 1142 irq1 & IRQ_CSMA_CA ? "IRQ_CSMA_CA\n" : "", 1143 irq1 & IRQ_FRAME_VALID ? "IRQ_FRAME_VALID\n" : "", 1144 irq1 & IRQ_ADDRESS_VALID ? "IRQ_ADDRESS_VALID\n" : ""); 1145 1146 seq_printf(file, "STATUS = %X:\n%s\n%s\n%s\n%s\n%s%s%s%s%s\n", stat, 1147 stat & STAT_SPI_READY ? "SPI_READY" : "SPI_BUSY", 1148 stat & STAT_IRQ_STATUS ? "IRQ_PENDING" : "IRQ_CLEAR", 1149 stat & STAT_RC_READY ? "RC_READY" : "RC_BUSY", 1150 stat & STAT_CCA_RESULT ? "CHAN_IDLE" : "CHAN_BUSY", 1151 (stat & 0xf) == RC_STATUS_IDLE ? "RC_STATUS_IDLE" : "", 1152 (stat & 0xf) == RC_STATUS_MEAS ? "RC_STATUS_MEAS" : "", 1153 (stat & 0xf) == RC_STATUS_PHY_RDY ? "RC_STATUS_PHY_RDY" : "", 1154 (stat & 0xf) == RC_STATUS_RX ? "RC_STATUS_RX" : "", 1155 (stat & 0xf) == RC_STATUS_TX ? "RC_STATUS_TX" : ""); 1156 1157 seq_printf(file, "RSSI = %d\n", lp->rssi); 1158 1159 return 0; 1160 } 1161 1162 static int adf7242_debugfs_init(struct adf7242_local *lp) 1163 { 1164 char debugfs_dir_name[DNAME_INLINE_LEN + 1] = "adf7242-"; 1165 struct dentry *stats; 1166 1167 strncat(debugfs_dir_name, dev_name(&lp->spi->dev), DNAME_INLINE_LEN); 1168 1169 lp->debugfs_root = debugfs_create_dir(debugfs_dir_name, NULL); 1170 if (IS_ERR_OR_NULL(lp->debugfs_root)) 1171 return PTR_ERR_OR_ZERO(lp->debugfs_root); 1172 1173 stats = debugfs_create_devm_seqfile(&lp->spi->dev, "status", 1174 lp->debugfs_root, 1175 adf7242_stats_show); 1176 return PTR_ERR_OR_ZERO(stats); 1177 1178 return 0; 1179 } 1180 1181 static const s32 adf7242_powers[] = { 1182 500, 400, 300, 200, 100, 0, -100, -200, -300, -400, -500, -600, -700, 1183 -800, -900, -1000, -1100, -1200, -1300, -1400, -1500, -1600, -1700, 1184 -1800, -1900, -2000, -2100, -2200, -2300, -2400, -2500, -2600, 1185 }; 1186 1187 static const s32 adf7242_ed_levels[] = { 1188 -9000, -8900, -8800, -8700, -8600, -8500, -8400, -8300, -8200, -8100, 1189 -8000, -7900, -7800, -7700, -7600, -7500, -7400, -7300, -7200, -7100, 1190 -7000, -6900, -6800, -6700, -6600, -6500, -6400, -6300, -6200, -6100, 1191 -6000, -5900, -5800, -5700, -5600, -5500, -5400, -5300, -5200, -5100, 1192 -5000, -4900, -4800, -4700, -4600, -4500, -4400, -4300, -4200, -4100, 1193 -4000, -3900, -3800, -3700, -3600, -3500, -3400, -3200, -3100, -3000 1194 }; 1195 1196 static int adf7242_probe(struct spi_device *spi) 1197 { 1198 struct ieee802154_hw *hw; 1199 struct adf7242_local *lp; 1200 int ret, irq_type; 1201 1202 if (!spi->irq) { 1203 dev_err(&spi->dev, "no IRQ specified\n"); 1204 return -EINVAL; 1205 } 1206 1207 hw = ieee802154_alloc_hw(sizeof(*lp), &adf7242_ops); 1208 if (!hw) 1209 return -ENOMEM; 1210 1211 lp = hw->priv; 1212 lp->hw = hw; 1213 lp->spi = spi; 1214 1215 hw->priv = lp; 1216 hw->parent = &spi->dev; 1217 hw->extra_tx_headroom = 0; 1218 1219 /* We support only 2.4 Ghz */ 1220 hw->phy->supported.channels[0] = 0x7FFF800; 1221 1222 hw->flags = IEEE802154_HW_OMIT_CKSUM | 1223 IEEE802154_HW_CSMA_PARAMS | 1224 IEEE802154_HW_FRAME_RETRIES | IEEE802154_HW_AFILT | 1225 IEEE802154_HW_PROMISCUOUS; 1226 1227 hw->phy->flags = WPAN_PHY_FLAG_TXPOWER | 1228 WPAN_PHY_FLAG_CCA_ED_LEVEL | 1229 WPAN_PHY_FLAG_CCA_MODE; 1230 1231 hw->phy->supported.cca_modes = BIT(NL802154_CCA_ENERGY); 1232 1233 hw->phy->supported.cca_ed_levels = adf7242_ed_levels; 1234 hw->phy->supported.cca_ed_levels_size = ARRAY_SIZE(adf7242_ed_levels); 1235 1236 hw->phy->cca.mode = NL802154_CCA_ENERGY; 1237 1238 hw->phy->supported.tx_powers = adf7242_powers; 1239 hw->phy->supported.tx_powers_size = ARRAY_SIZE(adf7242_powers); 1240 1241 hw->phy->supported.min_minbe = 0; 1242 hw->phy->supported.max_minbe = 8; 1243 1244 hw->phy->supported.min_maxbe = 3; 1245 hw->phy->supported.max_maxbe = 8; 1246 1247 hw->phy->supported.min_frame_retries = 0; 1248 hw->phy->supported.max_frame_retries = 15; 1249 1250 hw->phy->supported.min_csma_backoffs = 0; 1251 hw->phy->supported.max_csma_backoffs = 5; 1252 1253 ieee802154_random_extended_addr(&hw->phy->perm_extended_addr); 1254 1255 mutex_init(&lp->bmux); 1256 init_completion(&lp->tx_complete); 1257 1258 /* Setup Status Message */ 1259 lp->stat_xfer.len = 1; 1260 lp->stat_xfer.tx_buf = &lp->buf_stat_tx; 1261 lp->stat_xfer.rx_buf = &lp->buf_stat_rx; 1262 lp->buf_stat_tx = CMD_SPI_NOP; 1263 1264 spi_message_init(&lp->stat_msg); 1265 spi_message_add_tail(&lp->stat_xfer, &lp->stat_msg); 1266 1267 spi_set_drvdata(spi, lp); 1268 INIT_DELAYED_WORK(&lp->work, adf7242_rx_cal_work); 1269 lp->wqueue = alloc_ordered_workqueue(dev_name(&spi->dev), 1270 WQ_MEM_RECLAIM); 1271 1272 ret = adf7242_hw_init(lp); 1273 if (ret) 1274 goto err_hw_init; 1275 1276 irq_type = irq_get_trigger_type(spi->irq); 1277 if (!irq_type) 1278 irq_type = IRQF_TRIGGER_HIGH; 1279 1280 ret = devm_request_threaded_irq(&spi->dev, spi->irq, NULL, adf7242_isr, 1281 irq_type | IRQF_ONESHOT, 1282 dev_name(&spi->dev), lp); 1283 if (ret) 1284 goto err_hw_init; 1285 1286 disable_irq(spi->irq); 1287 1288 ret = ieee802154_register_hw(lp->hw); 1289 if (ret) 1290 goto err_hw_init; 1291 1292 dev_set_drvdata(&spi->dev, lp); 1293 1294 adf7242_debugfs_init(lp); 1295 1296 dev_info(&spi->dev, "mac802154 IRQ-%d registered\n", spi->irq); 1297 1298 return ret; 1299 1300 err_hw_init: 1301 mutex_destroy(&lp->bmux); 1302 ieee802154_free_hw(lp->hw); 1303 1304 return ret; 1305 } 1306 1307 static int adf7242_remove(struct spi_device *spi) 1308 { 1309 struct adf7242_local *lp = spi_get_drvdata(spi); 1310 1311 if (!IS_ERR_OR_NULL(lp->debugfs_root)) 1312 debugfs_remove_recursive(lp->debugfs_root); 1313 1314 cancel_delayed_work_sync(&lp->work); 1315 destroy_workqueue(lp->wqueue); 1316 1317 ieee802154_unregister_hw(lp->hw); 1318 mutex_destroy(&lp->bmux); 1319 ieee802154_free_hw(lp->hw); 1320 1321 return 0; 1322 } 1323 1324 static const struct of_device_id adf7242_of_match[] = { 1325 { .compatible = "adi,adf7242", }, 1326 { .compatible = "adi,adf7241", }, 1327 { }, 1328 }; 1329 MODULE_DEVICE_TABLE(of, adf7242_of_match); 1330 1331 static const struct spi_device_id adf7242_device_id[] = { 1332 { .name = "adf7242", }, 1333 { .name = "adf7241", }, 1334 { }, 1335 }; 1336 MODULE_DEVICE_TABLE(spi, adf7242_device_id); 1337 1338 static struct spi_driver adf7242_driver = { 1339 .id_table = adf7242_device_id, 1340 .driver = { 1341 .of_match_table = of_match_ptr(adf7242_of_match), 1342 .name = "adf7242", 1343 .owner = THIS_MODULE, 1344 }, 1345 .probe = adf7242_probe, 1346 .remove = adf7242_remove, 1347 }; 1348 1349 module_spi_driver(adf7242_driver); 1350 1351 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); 1352 MODULE_DESCRIPTION("ADF7242 IEEE802.15.4 Transceiver Driver"); 1353 MODULE_LICENSE("GPL"); 1354