1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* Copyright (C) 2018 Microchip Technology Inc. */ 3 4 #include <linux/netdevice.h> 5 6 #include <linux/ptp_clock_kernel.h> 7 #include <linux/module.h> 8 #include <linux/pci.h> 9 #include <linux/net_tstamp.h> 10 #include "lan743x_main.h" 11 12 #include "lan743x_ptp.h" 13 14 #define LAN743X_LED0_ENABLE 20 /* LED0 offset in HW_CFG */ 15 #define LAN743X_LED_ENABLE(pin) BIT(LAN743X_LED0_ENABLE + (pin)) 16 17 #define LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB (31249999) 18 #define LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM (2047999934) 19 20 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter); 21 static void lan743x_ptp_enable(struct lan743x_adapter *adapter); 22 static void lan743x_ptp_disable(struct lan743x_adapter *adapter); 23 static void lan743x_ptp_reset(struct lan743x_adapter *adapter); 24 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter, 25 u32 seconds, u32 nano_seconds, 26 u32 sub_nano_seconds); 27 28 static int lan743x_get_channel(u32 ch_map) 29 { 30 int idx; 31 32 for (idx = 0; idx < 32; idx++) { 33 if (ch_map & (0x1 << idx)) 34 return idx; 35 } 36 37 return -EINVAL; 38 } 39 40 int lan743x_gpio_init(struct lan743x_adapter *adapter) 41 { 42 struct lan743x_gpio *gpio = &adapter->gpio; 43 44 spin_lock_init(&gpio->gpio_lock); 45 46 gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */ 47 gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */ 48 gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */ 49 gpio->gpio_cfg3 = 0;/* disable all 1588 output */ 50 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); 51 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); 52 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2); 53 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3); 54 55 return 0; 56 } 57 58 static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter, 59 u32 bit_mask) 60 { 61 int timeout = 1000; 62 u32 data = 0; 63 64 while (timeout && 65 (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) & 66 bit_mask))) { 67 usleep_range(1000, 20000); 68 timeout--; 69 } 70 if (data) { 71 netif_err(adapter, drv, adapter->netdev, 72 "timeout waiting for cmd to be done, cmd = 0x%08X\n", 73 bit_mask); 74 } 75 } 76 77 static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter, 78 u32 seconds, u32 nano_seconds, 79 u32 header) 80 { 81 struct lan743x_ptp *ptp = &adapter->ptp; 82 83 spin_lock_bh(&ptp->tx_ts_lock); 84 if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { 85 ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds; 86 ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds; 87 ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header; 88 ptp->tx_ts_queue_size++; 89 } else { 90 netif_err(adapter, drv, adapter->netdev, 91 "tx ts queue overflow\n"); 92 } 93 spin_unlock_bh(&ptp->tx_ts_lock); 94 } 95 96 static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter) 97 { 98 struct lan743x_ptp *ptp = &adapter->ptp; 99 struct skb_shared_hwtstamps tstamps; 100 u32 header, nseconds, seconds; 101 bool ignore_sync = false; 102 struct sk_buff *skb; 103 int c, i; 104 105 spin_lock_bh(&ptp->tx_ts_lock); 106 c = ptp->tx_ts_skb_queue_size; 107 108 if (c > ptp->tx_ts_queue_size) 109 c = ptp->tx_ts_queue_size; 110 if (c <= 0) 111 goto done; 112 113 for (i = 0; i < c; i++) { 114 ignore_sync = ((ptp->tx_ts_ignore_sync_queue & 115 BIT(i)) != 0); 116 skb = ptp->tx_ts_skb_queue[i]; 117 nseconds = ptp->tx_ts_nseconds_queue[i]; 118 seconds = ptp->tx_ts_seconds_queue[i]; 119 header = ptp->tx_ts_header_queue[i]; 120 121 memset(&tstamps, 0, sizeof(tstamps)); 122 tstamps.hwtstamp = ktime_set(seconds, nseconds); 123 if (!ignore_sync || 124 ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) != 125 PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_)) 126 skb_tstamp_tx(skb, &tstamps); 127 128 dev_kfree_skb(skb); 129 130 ptp->tx_ts_skb_queue[i] = NULL; 131 ptp->tx_ts_seconds_queue[i] = 0; 132 ptp->tx_ts_nseconds_queue[i] = 0; 133 ptp->tx_ts_header_queue[i] = 0; 134 } 135 136 /* shift queue */ 137 ptp->tx_ts_ignore_sync_queue >>= c; 138 for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) { 139 ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i]; 140 ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i]; 141 ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i]; 142 ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i]; 143 144 ptp->tx_ts_skb_queue[i] = NULL; 145 ptp->tx_ts_seconds_queue[i] = 0; 146 ptp->tx_ts_nseconds_queue[i] = 0; 147 ptp->tx_ts_header_queue[i] = 0; 148 } 149 ptp->tx_ts_skb_queue_size -= c; 150 ptp->tx_ts_queue_size -= c; 151 done: 152 ptp->pending_tx_timestamps -= c; 153 spin_unlock_bh(&ptp->tx_ts_lock); 154 } 155 156 static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter, 157 int event_channel) 158 { 159 struct lan743x_ptp *ptp = &adapter->ptp; 160 int result = -ENODEV; 161 162 mutex_lock(&ptp->command_lock); 163 if (!(test_bit(event_channel, &ptp->used_event_ch))) { 164 ptp->used_event_ch |= BIT(event_channel); 165 result = event_channel; 166 } else { 167 netif_warn(adapter, drv, adapter->netdev, 168 "attempted to reserved a used event_channel = %d\n", 169 event_channel); 170 } 171 mutex_unlock(&ptp->command_lock); 172 return result; 173 } 174 175 static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter, 176 int event_channel) 177 { 178 struct lan743x_ptp *ptp = &adapter->ptp; 179 180 mutex_lock(&ptp->command_lock); 181 if (test_bit(event_channel, &ptp->used_event_ch)) { 182 ptp->used_event_ch &= ~BIT(event_channel); 183 } else { 184 netif_warn(adapter, drv, adapter->netdev, 185 "attempted release on a not used event_channel = %d\n", 186 event_channel); 187 } 188 mutex_unlock(&ptp->command_lock); 189 } 190 191 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter, 192 u32 *seconds, u32 *nano_seconds, 193 u32 *sub_nano_seconds); 194 static void lan743x_ptp_io_clock_get(struct lan743x_adapter *adapter, 195 u32 *sec, u32 *nsec, u32 *sub_nsec); 196 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter, 197 s64 time_step_ns); 198 199 static void lan743x_led_mux_enable(struct lan743x_adapter *adapter, 200 int pin, bool enable) 201 { 202 struct lan743x_ptp *ptp = &adapter->ptp; 203 204 if (ptp->leds_multiplexed && 205 ptp->led_enabled[pin]) { 206 u32 val = lan743x_csr_read(adapter, HW_CFG); 207 208 if (enable) 209 val |= LAN743X_LED_ENABLE(pin); 210 else 211 val &= ~LAN743X_LED_ENABLE(pin); 212 213 lan743x_csr_write(adapter, HW_CFG, val); 214 } 215 } 216 217 static void lan743x_led_mux_save(struct lan743x_adapter *adapter) 218 { 219 struct lan743x_ptp *ptp = &adapter->ptp; 220 u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_; 221 222 if (id_rev == ID_REV_ID_LAN7430_) { 223 int i; 224 u32 val = lan743x_csr_read(adapter, HW_CFG); 225 226 for (i = 0; i < LAN7430_N_LED; i++) { 227 bool led_enabled = (val & LAN743X_LED_ENABLE(i)) != 0; 228 229 ptp->led_enabled[i] = led_enabled; 230 } 231 ptp->leds_multiplexed = true; 232 } else { 233 ptp->leds_multiplexed = false; 234 } 235 } 236 237 static void lan743x_led_mux_restore(struct lan743x_adapter *adapter) 238 { 239 u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_; 240 241 if (id_rev == ID_REV_ID_LAN7430_) { 242 int i; 243 244 for (i = 0; i < LAN7430_N_LED; i++) 245 lan743x_led_mux_enable(adapter, i, true); 246 } 247 } 248 249 static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter, 250 int pin, int event_channel) 251 { 252 struct lan743x_gpio *gpio = &adapter->gpio; 253 unsigned long irq_flags = 0; 254 int bit_mask = BIT(pin); 255 int ret = -EBUSY; 256 257 spin_lock_irqsave(&gpio->gpio_lock, irq_flags); 258 259 if (!(gpio->used_bits & bit_mask)) { 260 gpio->used_bits |= bit_mask; 261 gpio->output_bits |= bit_mask; 262 gpio->ptp_bits |= bit_mask; 263 264 /* assign pin to GPIO function */ 265 lan743x_led_mux_enable(adapter, pin, false); 266 267 /* set as output, and zero initial value */ 268 gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(pin); 269 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin); 270 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); 271 272 /* enable gpio, and set buffer type to push pull */ 273 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(pin); 274 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(pin); 275 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); 276 277 /* set 1588 polarity to high */ 278 gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(pin); 279 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2); 280 281 if (event_channel == 0) { 282 /* use channel A */ 283 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(pin); 284 } else { 285 /* use channel B */ 286 gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(pin); 287 } 288 gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(pin); 289 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3); 290 291 ret = pin; 292 } 293 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags); 294 return ret; 295 } 296 297 static void lan743x_gpio_release(struct lan743x_adapter *adapter, int pin) 298 { 299 struct lan743x_gpio *gpio = &adapter->gpio; 300 unsigned long irq_flags = 0; 301 int bit_mask = BIT(pin); 302 303 spin_lock_irqsave(&gpio->gpio_lock, irq_flags); 304 if (gpio->used_bits & bit_mask) { 305 gpio->used_bits &= ~bit_mask; 306 if (gpio->output_bits & bit_mask) { 307 gpio->output_bits &= ~bit_mask; 308 309 if (gpio->ptp_bits & bit_mask) { 310 gpio->ptp_bits &= ~bit_mask; 311 /* disable ptp output */ 312 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(pin); 313 lan743x_csr_write(adapter, GPIO_CFG3, 314 gpio->gpio_cfg3); 315 } 316 /* release gpio output */ 317 318 /* disable gpio */ 319 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(pin); 320 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(pin); 321 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1); 322 323 /* reset back to input */ 324 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(pin); 325 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin); 326 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0); 327 328 /* assign pin to original function */ 329 lan743x_led_mux_enable(adapter, pin, true); 330 } 331 } 332 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags); 333 } 334 335 static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm) 336 { 337 struct lan743x_ptp *ptp = 338 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 339 struct lan743x_adapter *adapter = 340 container_of(ptp, struct lan743x_adapter, ptp); 341 u32 lan743x_rate_adj = 0; 342 bool positive = true; 343 u64 u64_delta = 0; 344 345 if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) || 346 scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) { 347 return -EINVAL; 348 } 349 if (scaled_ppm > 0) { 350 u64_delta = (u64)scaled_ppm; 351 positive = true; 352 } else { 353 u64_delta = (u64)(-scaled_ppm); 354 positive = false; 355 } 356 u64_delta = (u64_delta << 19); 357 lan743x_rate_adj = div_u64(u64_delta, 1000000); 358 359 if (positive) 360 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_; 361 362 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ, 363 lan743x_rate_adj); 364 365 return 0; 366 } 367 368 static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb) 369 { 370 struct lan743x_ptp *ptp = 371 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 372 struct lan743x_adapter *adapter = 373 container_of(ptp, struct lan743x_adapter, ptp); 374 u32 lan743x_rate_adj = 0; 375 bool positive = true; 376 u32 u32_delta = 0; 377 u64 u64_delta = 0; 378 379 if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) || 380 delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) { 381 return -EINVAL; 382 } 383 if (delta_ppb > 0) { 384 u32_delta = (u32)delta_ppb; 385 positive = true; 386 } else { 387 u32_delta = (u32)(-delta_ppb); 388 positive = false; 389 } 390 u64_delta = (((u64)u32_delta) << 35); 391 lan743x_rate_adj = div_u64(u64_delta, 1000000000); 392 393 if (positive) 394 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_; 395 396 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ, 397 lan743x_rate_adj); 398 399 return 0; 400 } 401 402 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta) 403 { 404 struct lan743x_ptp *ptp = 405 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 406 struct lan743x_adapter *adapter = 407 container_of(ptp, struct lan743x_adapter, ptp); 408 409 lan743x_ptp_clock_step(adapter, delta); 410 411 return 0; 412 } 413 414 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci, 415 struct timespec64 *ts) 416 { 417 struct lan743x_ptp *ptp = 418 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 419 struct lan743x_adapter *adapter = 420 container_of(ptp, struct lan743x_adapter, ptp); 421 u32 nano_seconds = 0; 422 u32 seconds = 0; 423 424 if (adapter->is_pci11x1x) 425 lan743x_ptp_io_clock_get(adapter, &seconds, &nano_seconds, 426 NULL); 427 else 428 lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL); 429 ts->tv_sec = seconds; 430 ts->tv_nsec = nano_seconds; 431 432 return 0; 433 } 434 435 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci, 436 const struct timespec64 *ts) 437 { 438 struct lan743x_ptp *ptp = 439 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 440 struct lan743x_adapter *adapter = 441 container_of(ptp, struct lan743x_adapter, ptp); 442 u32 nano_seconds = 0; 443 u32 seconds = 0; 444 445 if (ts) { 446 if (ts->tv_sec > 0xFFFFFFFFLL || 447 ts->tv_sec < 0) { 448 netif_warn(adapter, drv, adapter->netdev, 449 "ts->tv_sec out of range, %lld\n", 450 ts->tv_sec); 451 return -ERANGE; 452 } 453 if (ts->tv_nsec >= 1000000000L || 454 ts->tv_nsec < 0) { 455 netif_warn(adapter, drv, adapter->netdev, 456 "ts->tv_nsec out of range, %ld\n", 457 ts->tv_nsec); 458 return -ERANGE; 459 } 460 seconds = ts->tv_sec; 461 nano_seconds = ts->tv_nsec; 462 lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0); 463 } else { 464 netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n"); 465 return -EINVAL; 466 } 467 468 return 0; 469 } 470 471 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter, 472 unsigned int index) 473 { 474 struct lan743x_ptp *ptp = &adapter->ptp; 475 u32 general_config = 0; 476 struct lan743x_ptp_perout *perout = &ptp->perout[index]; 477 478 if (perout->gpio_pin >= 0) { 479 lan743x_gpio_release(adapter, perout->gpio_pin); 480 perout->gpio_pin = -1; 481 } 482 483 if (perout->event_ch >= 0) { 484 /* set target to far in the future, effectively disabling it */ 485 lan743x_csr_write(adapter, 486 PTP_CLOCK_TARGET_SEC_X(perout->event_ch), 487 0xFFFF0000); 488 lan743x_csr_write(adapter, 489 PTP_CLOCK_TARGET_NS_X(perout->event_ch), 490 0); 491 492 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG); 493 general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_ 494 (perout->event_ch); 495 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config); 496 lan743x_ptp_release_event_ch(adapter, perout->event_ch); 497 perout->event_ch = -1; 498 } 499 } 500 501 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on, 502 struct ptp_perout_request *perout_request) 503 { 504 struct lan743x_ptp *ptp = &adapter->ptp; 505 u32 period_sec = 0, period_nsec = 0; 506 u32 start_sec = 0, start_nsec = 0; 507 u32 general_config = 0; 508 int pulse_width = 0; 509 int perout_pin = 0; 510 unsigned int index = perout_request->index; 511 struct lan743x_ptp_perout *perout = &ptp->perout[index]; 512 int ret = 0; 513 514 /* Reject requests with unsupported flags */ 515 if (perout_request->flags & ~PTP_PEROUT_DUTY_CYCLE) 516 return -EOPNOTSUPP; 517 518 if (on) { 519 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, 520 perout_request->index); 521 if (perout_pin < 0) 522 return -EBUSY; 523 } else { 524 lan743x_ptp_perout_off(adapter, index); 525 return 0; 526 } 527 528 if (perout->event_ch >= 0 || 529 perout->gpio_pin >= 0) { 530 /* already on, turn off first */ 531 lan743x_ptp_perout_off(adapter, index); 532 } 533 534 perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index); 535 536 if (perout->event_ch < 0) { 537 netif_warn(adapter, drv, adapter->netdev, 538 "Failed to reserve event channel %d for PEROUT\n", 539 index); 540 ret = -EBUSY; 541 goto failed; 542 } 543 544 perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter, 545 perout_pin, 546 perout->event_ch); 547 548 if (perout->gpio_pin < 0) { 549 netif_warn(adapter, drv, adapter->netdev, 550 "Failed to reserve gpio %d for PEROUT\n", 551 perout_pin); 552 ret = -EBUSY; 553 goto failed; 554 } 555 556 start_sec = perout_request->start.sec; 557 start_sec += perout_request->start.nsec / 1000000000; 558 start_nsec = perout_request->start.nsec % 1000000000; 559 560 period_sec = perout_request->period.sec; 561 period_sec += perout_request->period.nsec / 1000000000; 562 period_nsec = perout_request->period.nsec % 1000000000; 563 564 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) { 565 struct timespec64 ts_on, ts_period; 566 s64 wf_high, period64, half; 567 s32 reminder; 568 569 ts_on.tv_sec = perout_request->on.sec; 570 ts_on.tv_nsec = perout_request->on.nsec; 571 wf_high = timespec64_to_ns(&ts_on); 572 ts_period.tv_sec = perout_request->period.sec; 573 ts_period.tv_nsec = perout_request->period.nsec; 574 period64 = timespec64_to_ns(&ts_period); 575 576 if (period64 < 200) { 577 netif_warn(adapter, drv, adapter->netdev, 578 "perout period too small, minimum is 200nS\n"); 579 ret = -EOPNOTSUPP; 580 goto failed; 581 } 582 if (wf_high >= period64) { 583 netif_warn(adapter, drv, adapter->netdev, 584 "pulse width must be smaller than period\n"); 585 ret = -EINVAL; 586 goto failed; 587 } 588 589 /* Check if we can do 50% toggle on an even value of period. 590 * If the period number is odd, then check if the requested 591 * pulse width is the same as one of pre-defined width values. 592 * Otherwise, return failure. 593 */ 594 half = div_s64_rem(period64, 2, &reminder); 595 if (!reminder) { 596 if (half == wf_high) { 597 /* It's 50% match. Use the toggle option */ 598 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGGLE_; 599 /* In this case, devide period value by 2 */ 600 ts_period = ns_to_timespec64(div_s64(period64, 2)); 601 period_sec = ts_period.tv_sec; 602 period_nsec = ts_period.tv_nsec; 603 604 goto program; 605 } 606 } 607 /* if we can't do toggle, then the width option needs to be the exact match */ 608 if (wf_high == 200000000) { 609 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; 610 } else if (wf_high == 10000000) { 611 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_; 612 } else if (wf_high == 1000000) { 613 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_; 614 } else if (wf_high == 100000) { 615 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_; 616 } else if (wf_high == 10000) { 617 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_; 618 } else if (wf_high == 100) { 619 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_; 620 } else { 621 netif_warn(adapter, drv, adapter->netdev, 622 "duty cycle specified is not supported\n"); 623 ret = -EOPNOTSUPP; 624 goto failed; 625 } 626 } else { 627 if (period_sec == 0) { 628 if (period_nsec >= 400000000) { 629 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; 630 } else if (period_nsec >= 20000000) { 631 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_; 632 } else if (period_nsec >= 2000000) { 633 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_; 634 } else if (period_nsec >= 200000) { 635 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_; 636 } else if (period_nsec >= 20000) { 637 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_; 638 } else if (period_nsec >= 200) { 639 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_; 640 } else { 641 netif_warn(adapter, drv, adapter->netdev, 642 "perout period too small, minimum is 200nS\n"); 643 ret = -EOPNOTSUPP; 644 goto failed; 645 } 646 } else { 647 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; 648 } 649 } 650 program: 651 652 /* turn off by setting target far in future */ 653 lan743x_csr_write(adapter, 654 PTP_CLOCK_TARGET_SEC_X(perout->event_ch), 655 0xFFFF0000); 656 lan743x_csr_write(adapter, 657 PTP_CLOCK_TARGET_NS_X(perout->event_ch), 0); 658 659 /* Configure to pulse every period */ 660 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG); 661 general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_ 662 (perout->event_ch)); 663 general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_ 664 (perout->event_ch, pulse_width); 665 general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_ 666 (perout->event_ch); 667 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config); 668 669 /* set the reload to one toggle cycle */ 670 lan743x_csr_write(adapter, 671 PTP_CLOCK_TARGET_RELOAD_SEC_X(perout->event_ch), 672 period_sec); 673 lan743x_csr_write(adapter, 674 PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch), 675 period_nsec); 676 677 /* set the start time */ 678 lan743x_csr_write(adapter, 679 PTP_CLOCK_TARGET_SEC_X(perout->event_ch), 680 start_sec); 681 lan743x_csr_write(adapter, 682 PTP_CLOCK_TARGET_NS_X(perout->event_ch), 683 start_nsec); 684 685 return 0; 686 687 failed: 688 lan743x_ptp_perout_off(adapter, index); 689 return ret; 690 } 691 692 static void lan743x_ptp_io_perout_off(struct lan743x_adapter *adapter, 693 u32 index) 694 { 695 struct lan743x_ptp *ptp = &adapter->ptp; 696 int perout_pin; 697 int event_ch; 698 u32 gen_cfg; 699 int val; 700 701 event_ch = ptp->ptp_io_perout[index]; 702 if (event_ch >= 0) { 703 /* set target to far in the future, effectively disabling it */ 704 lan743x_csr_write(adapter, 705 PTP_CLOCK_TARGET_SEC_X(event_ch), 706 0xFFFF0000); 707 lan743x_csr_write(adapter, 708 PTP_CLOCK_TARGET_NS_X(event_ch), 709 0); 710 711 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG); 712 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_ 713 (event_ch)); 714 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch)); 715 gen_cfg |= HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch); 716 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg); 717 if (event_ch) 718 lan743x_csr_write(adapter, PTP_INT_STS, 719 PTP_INT_TIMER_INT_B_); 720 else 721 lan743x_csr_write(adapter, PTP_INT_STS, 722 PTP_INT_TIMER_INT_A_); 723 lan743x_ptp_release_event_ch(adapter, event_ch); 724 ptp->ptp_io_perout[index] = -1; 725 } 726 727 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index); 728 729 /* Deselect Event output */ 730 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG); 731 732 /* Disables the output of Local Time Target compare events */ 733 val &= ~PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin); 734 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val); 735 736 /* Configured as an opendrain driver*/ 737 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG); 738 val &= ~PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin); 739 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val); 740 /* Dummy read to make sure write operation success */ 741 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG); 742 } 743 744 static int lan743x_ptp_io_perout(struct lan743x_adapter *adapter, int on, 745 struct ptp_perout_request *perout_request) 746 { 747 struct lan743x_ptp *ptp = &adapter->ptp; 748 u32 period_sec, period_nsec; 749 u32 start_sec, start_nsec; 750 u32 pulse_sec, pulse_nsec; 751 int pulse_width; 752 int perout_pin; 753 int event_ch; 754 u32 gen_cfg; 755 u32 index; 756 int val; 757 758 index = perout_request->index; 759 event_ch = ptp->ptp_io_perout[index]; 760 761 if (on) { 762 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index); 763 if (perout_pin < 0) 764 return -EBUSY; 765 } else { 766 lan743x_ptp_io_perout_off(adapter, index); 767 return 0; 768 } 769 770 if (event_ch >= LAN743X_PTP_N_EVENT_CHAN) { 771 /* already on, turn off first */ 772 lan743x_ptp_io_perout_off(adapter, index); 773 } 774 775 event_ch = lan743x_ptp_reserve_event_ch(adapter, index); 776 if (event_ch < 0) { 777 netif_warn(adapter, drv, adapter->netdev, 778 "Failed to reserve event channel %d for PEROUT\n", 779 index); 780 goto failed; 781 } 782 ptp->ptp_io_perout[index] = event_ch; 783 784 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) { 785 pulse_sec = perout_request->on.sec; 786 pulse_sec += perout_request->on.nsec / 1000000000; 787 pulse_nsec = perout_request->on.nsec % 1000000000; 788 } else { 789 pulse_sec = perout_request->period.sec; 790 pulse_sec += perout_request->period.nsec / 1000000000; 791 pulse_nsec = perout_request->period.nsec % 1000000000; 792 } 793 794 if (pulse_sec == 0) { 795 if (pulse_nsec >= 400000000) { 796 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; 797 } else if (pulse_nsec >= 200000000) { 798 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100MS_; 799 } else if (pulse_nsec >= 100000000) { 800 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50MS_; 801 } else if (pulse_nsec >= 20000000) { 802 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_; 803 } else if (pulse_nsec >= 10000000) { 804 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5MS_; 805 } else if (pulse_nsec >= 2000000) { 806 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_; 807 } else if (pulse_nsec >= 1000000) { 808 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500US_; 809 } else if (pulse_nsec >= 200000) { 810 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_; 811 } else if (pulse_nsec >= 100000) { 812 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50US_; 813 } else if (pulse_nsec >= 20000) { 814 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_; 815 } else if (pulse_nsec >= 10000) { 816 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5US_; 817 } else if (pulse_nsec >= 2000) { 818 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1US_; 819 } else if (pulse_nsec >= 1000) { 820 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500NS_; 821 } else if (pulse_nsec >= 200) { 822 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_; 823 } else { 824 netif_warn(adapter, drv, adapter->netdev, 825 "perout period too small, min is 200nS\n"); 826 goto failed; 827 } 828 } else { 829 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_; 830 } 831 832 /* turn off by setting target far in future */ 833 lan743x_csr_write(adapter, 834 PTP_CLOCK_TARGET_SEC_X(event_ch), 835 0xFFFF0000); 836 lan743x_csr_write(adapter, 837 PTP_CLOCK_TARGET_NS_X(event_ch), 0); 838 839 /* Configure to pulse every period */ 840 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG); 841 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(event_ch)); 842 gen_cfg |= HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_ 843 (event_ch, pulse_width); 844 gen_cfg |= HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch); 845 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch)); 846 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg); 847 848 /* set the reload to one toggle cycle */ 849 period_sec = perout_request->period.sec; 850 period_sec += perout_request->period.nsec / 1000000000; 851 period_nsec = perout_request->period.nsec % 1000000000; 852 lan743x_csr_write(adapter, 853 PTP_CLOCK_TARGET_RELOAD_SEC_X(event_ch), 854 period_sec); 855 lan743x_csr_write(adapter, 856 PTP_CLOCK_TARGET_RELOAD_NS_X(event_ch), 857 period_nsec); 858 859 start_sec = perout_request->start.sec; 860 start_sec += perout_request->start.nsec / 1000000000; 861 start_nsec = perout_request->start.nsec % 1000000000; 862 863 /* set the start time */ 864 lan743x_csr_write(adapter, 865 PTP_CLOCK_TARGET_SEC_X(event_ch), 866 start_sec); 867 lan743x_csr_write(adapter, 868 PTP_CLOCK_TARGET_NS_X(event_ch), 869 start_nsec); 870 871 /* Enable LTC Target Read */ 872 val = lan743x_csr_read(adapter, PTP_CMD_CTL); 873 val |= PTP_CMD_CTL_PTP_LTC_TARGET_READ_; 874 lan743x_csr_write(adapter, PTP_CMD_CTL, val); 875 876 /* Configure as an push/pull driver */ 877 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG); 878 val |= PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin); 879 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val); 880 881 /* Select Event output */ 882 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG); 883 if (event_ch) 884 /* Channel B as the output */ 885 val |= PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin); 886 else 887 /* Channel A as the output */ 888 val &= ~PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin); 889 890 /* Enables the output of Local Time Target compare events */ 891 val |= PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin); 892 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val); 893 894 return 0; 895 896 failed: 897 lan743x_ptp_io_perout_off(adapter, index); 898 return -ENODEV; 899 } 900 901 static void lan743x_ptp_io_extts_off(struct lan743x_adapter *adapter, 902 u32 index) 903 { 904 struct lan743x_ptp *ptp = &adapter->ptp; 905 struct lan743x_extts *extts; 906 int val; 907 908 extts = &ptp->extts[index]; 909 /* PTP Interrupt Enable Clear Register */ 910 if (extts->flags & PTP_FALLING_EDGE) 911 val = PTP_INT_EN_FE_EN_CLR_(index); 912 else 913 val = PTP_INT_EN_RE_EN_CLR_(index); 914 lan743x_csr_write(adapter, PTP_INT_EN_CLR, val); 915 916 /* Disables PTP-IO edge lock */ 917 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG); 918 if (extts->flags & PTP_FALLING_EDGE) { 919 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(index); 920 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(index); 921 } else { 922 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(index); 923 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(index); 924 } 925 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val); 926 927 /* PTP-IO De-select register */ 928 val = lan743x_csr_read(adapter, PTP_IO_SEL); 929 val &= ~PTP_IO_SEL_MASK_; 930 lan743x_csr_write(adapter, PTP_IO_SEL, val); 931 932 /* Clear timestamp */ 933 memset(&extts->ts, 0, sizeof(struct timespec64)); 934 extts->flags = 0; 935 } 936 937 static int lan743x_ptp_io_event_cap_en(struct lan743x_adapter *adapter, 938 u32 flags, u32 channel) 939 { 940 struct lan743x_ptp *ptp = &adapter->ptp; 941 int val; 942 943 if ((flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES) 944 return -EOPNOTSUPP; 945 946 mutex_lock(&ptp->command_lock); 947 /* PTP-IO Event Capture Enable */ 948 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG); 949 if (flags & PTP_FALLING_EDGE) { 950 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(channel); 951 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel); 952 val |= PTP_IO_CAP_CONFIG_LOCK_FE_(channel); 953 val |= PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel); 954 } else { 955 /* Rising eventing as Default */ 956 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(channel); 957 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel); 958 val |= PTP_IO_CAP_CONFIG_LOCK_RE_(channel); 959 val |= PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel); 960 } 961 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val); 962 963 /* PTP-IO Select */ 964 val = lan743x_csr_read(adapter, PTP_IO_SEL); 965 val &= ~PTP_IO_SEL_MASK_; 966 val |= channel << PTP_IO_SEL_SHIFT_; 967 lan743x_csr_write(adapter, PTP_IO_SEL, val); 968 969 /* PTP Interrupt Enable Register */ 970 if (flags & PTP_FALLING_EDGE) 971 val = PTP_INT_EN_FE_EN_SET_(channel); 972 else 973 val = PTP_INT_EN_RE_EN_SET_(channel); 974 lan743x_csr_write(adapter, PTP_INT_EN_SET, val); 975 976 mutex_unlock(&ptp->command_lock); 977 978 return 0; 979 } 980 981 static int lan743x_ptp_io_extts(struct lan743x_adapter *adapter, int on, 982 struct ptp_extts_request *extts_request) 983 { 984 struct lan743x_ptp *ptp = &adapter->ptp; 985 u32 flags = extts_request->flags; 986 u32 index = extts_request->index; 987 struct lan743x_extts *extts; 988 int extts_pin; 989 int ret = 0; 990 991 extts = &ptp->extts[index]; 992 993 if (on) { 994 extts_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, index); 995 if (extts_pin < 0) 996 return -EBUSY; 997 998 ret = lan743x_ptp_io_event_cap_en(adapter, flags, index); 999 if (!ret) 1000 extts->flags = flags; 1001 } else { 1002 lan743x_ptp_io_extts_off(adapter, index); 1003 } 1004 1005 return ret; 1006 } 1007 1008 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci, 1009 struct ptp_clock_request *request, int on) 1010 { 1011 struct lan743x_ptp *ptp = 1012 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 1013 struct lan743x_adapter *adapter = 1014 container_of(ptp, struct lan743x_adapter, ptp); 1015 1016 if (request) { 1017 switch (request->type) { 1018 case PTP_CLK_REQ_EXTTS: 1019 if (request->extts.index < ptpci->n_ext_ts) 1020 return lan743x_ptp_io_extts(adapter, on, 1021 &request->extts); 1022 return -EINVAL; 1023 case PTP_CLK_REQ_PEROUT: 1024 if (request->perout.index < ptpci->n_per_out) { 1025 if (adapter->is_pci11x1x) 1026 return lan743x_ptp_io_perout(adapter, on, 1027 &request->perout); 1028 else 1029 return lan743x_ptp_perout(adapter, on, 1030 &request->perout); 1031 } 1032 return -EINVAL; 1033 case PTP_CLK_REQ_PPS: 1034 return -EINVAL; 1035 default: 1036 netif_err(adapter, drv, adapter->netdev, 1037 "request->type == %d, Unknown\n", 1038 request->type); 1039 break; 1040 } 1041 } else { 1042 netif_err(adapter, drv, adapter->netdev, "request == NULL\n"); 1043 } 1044 return 0; 1045 } 1046 1047 static int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp, 1048 unsigned int pin, 1049 enum ptp_pin_function func, 1050 unsigned int chan) 1051 { 1052 int result = 0; 1053 1054 /* Confirm the requested function is supported. Parameter 1055 * validation is done by the caller. 1056 */ 1057 switch (func) { 1058 case PTP_PF_NONE: 1059 case PTP_PF_PEROUT: 1060 case PTP_PF_EXTTS: 1061 break; 1062 case PTP_PF_PHYSYNC: 1063 default: 1064 result = -1; 1065 break; 1066 } 1067 return result; 1068 } 1069 1070 static void lan743x_ptp_io_event_clock_get(struct lan743x_adapter *adapter, 1071 bool fe, u8 channel, 1072 struct timespec64 *ts) 1073 { 1074 struct lan743x_ptp *ptp = &adapter->ptp; 1075 struct lan743x_extts *extts; 1076 u32 sec, nsec; 1077 1078 mutex_lock(&ptp->command_lock); 1079 if (fe) { 1080 sec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_SEC_CAP_X); 1081 nsec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_NS_CAP_X); 1082 } else { 1083 sec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_SEC_CAP_X); 1084 nsec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_NS_CAP_X); 1085 } 1086 1087 mutex_unlock(&ptp->command_lock); 1088 1089 /* Update Local timestamp */ 1090 extts = &ptp->extts[channel]; 1091 extts->ts.tv_sec = sec; 1092 extts->ts.tv_nsec = nsec; 1093 ts->tv_sec = sec; 1094 ts->tv_nsec = nsec; 1095 } 1096 1097 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci) 1098 { 1099 struct lan743x_ptp *ptp = 1100 container_of(ptpci, struct lan743x_ptp, ptp_clock_info); 1101 struct lan743x_adapter *adapter = 1102 container_of(ptp, struct lan743x_adapter, ptp); 1103 u32 cap_info, cause, header, nsec, seconds; 1104 bool new_timestamp_available = false; 1105 struct ptp_clock_event ptp_event; 1106 struct timespec64 ts; 1107 int ptp_int_sts; 1108 int count = 0; 1109 int channel; 1110 s64 ns; 1111 1112 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS); 1113 while ((count < 100) && ptp_int_sts) { 1114 count++; 1115 1116 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) { 1117 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO); 1118 1119 if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) { 1120 seconds = lan743x_csr_read(adapter, 1121 PTP_TX_EGRESS_SEC); 1122 nsec = lan743x_csr_read(adapter, 1123 PTP_TX_EGRESS_NS); 1124 cause = (nsec & 1125 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_); 1126 header = lan743x_csr_read(adapter, 1127 PTP_TX_MSG_HEADER); 1128 1129 if (cause == 1130 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) { 1131 nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_; 1132 lan743x_ptp_tx_ts_enqueue_ts(adapter, 1133 seconds, 1134 nsec, 1135 header); 1136 new_timestamp_available = true; 1137 } else if (cause == 1138 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) { 1139 netif_err(adapter, drv, adapter->netdev, 1140 "Auto capture cause not supported\n"); 1141 } else { 1142 netif_warn(adapter, drv, adapter->netdev, 1143 "unknown tx timestamp capture cause\n"); 1144 } 1145 } else { 1146 netif_warn(adapter, drv, adapter->netdev, 1147 "TX TS INT but no TX TS CNT\n"); 1148 } 1149 lan743x_csr_write(adapter, PTP_INT_STS, 1150 PTP_INT_BIT_TX_TS_); 1151 } 1152 1153 if (ptp_int_sts & PTP_INT_IO_FE_MASK_) { 1154 do { 1155 channel = lan743x_get_channel((ptp_int_sts & 1156 PTP_INT_IO_FE_MASK_) >> 1157 PTP_INT_IO_FE_SHIFT_); 1158 if (channel >= 0 && 1159 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) { 1160 lan743x_ptp_io_event_clock_get(adapter, 1161 true, 1162 channel, 1163 &ts); 1164 /* PTP Falling Event post */ 1165 ns = timespec64_to_ns(&ts); 1166 ptp_event.timestamp = ns; 1167 ptp_event.index = channel; 1168 ptp_event.type = PTP_CLOCK_EXTTS; 1169 ptp_clock_event(ptp->ptp_clock, 1170 &ptp_event); 1171 lan743x_csr_write(adapter, PTP_INT_STS, 1172 PTP_INT_IO_FE_SET_ 1173 (channel)); 1174 ptp_int_sts &= ~(1 << 1175 (PTP_INT_IO_FE_SHIFT_ + 1176 channel)); 1177 } else { 1178 /* Clear falling event interrupts */ 1179 lan743x_csr_write(adapter, PTP_INT_STS, 1180 PTP_INT_IO_FE_MASK_); 1181 ptp_int_sts &= ~PTP_INT_IO_FE_MASK_; 1182 } 1183 } while (ptp_int_sts & PTP_INT_IO_FE_MASK_); 1184 } 1185 1186 if (ptp_int_sts & PTP_INT_IO_RE_MASK_) { 1187 do { 1188 channel = lan743x_get_channel((ptp_int_sts & 1189 PTP_INT_IO_RE_MASK_) >> 1190 PTP_INT_IO_RE_SHIFT_); 1191 if (channel >= 0 && 1192 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) { 1193 lan743x_ptp_io_event_clock_get(adapter, 1194 false, 1195 channel, 1196 &ts); 1197 /* PTP Rising Event post */ 1198 ns = timespec64_to_ns(&ts); 1199 ptp_event.timestamp = ns; 1200 ptp_event.index = channel; 1201 ptp_event.type = PTP_CLOCK_EXTTS; 1202 ptp_clock_event(ptp->ptp_clock, 1203 &ptp_event); 1204 lan743x_csr_write(adapter, PTP_INT_STS, 1205 PTP_INT_IO_RE_SET_ 1206 (channel)); 1207 ptp_int_sts &= ~(1 << 1208 (PTP_INT_IO_RE_SHIFT_ + 1209 channel)); 1210 } else { 1211 /* Clear Rising event interrupt */ 1212 lan743x_csr_write(adapter, PTP_INT_STS, 1213 PTP_INT_IO_RE_MASK_); 1214 ptp_int_sts &= ~PTP_INT_IO_RE_MASK_; 1215 } 1216 } while (ptp_int_sts & PTP_INT_IO_RE_MASK_); 1217 } 1218 1219 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS); 1220 } 1221 1222 if (new_timestamp_available) 1223 lan743x_ptp_tx_ts_complete(adapter); 1224 1225 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); 1226 1227 return -1; 1228 } 1229 1230 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter, 1231 u32 *seconds, u32 *nano_seconds, 1232 u32 *sub_nano_seconds) 1233 { 1234 struct lan743x_ptp *ptp = &adapter->ptp; 1235 1236 mutex_lock(&ptp->command_lock); 1237 1238 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_); 1239 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_); 1240 1241 if (seconds) 1242 (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC); 1243 1244 if (nano_seconds) 1245 (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS); 1246 1247 if (sub_nano_seconds) 1248 (*sub_nano_seconds) = 1249 lan743x_csr_read(adapter, PTP_CLOCK_SUBNS); 1250 1251 mutex_unlock(&ptp->command_lock); 1252 } 1253 1254 static void lan743x_ptp_io_clock_get(struct lan743x_adapter *adapter, 1255 u32 *sec, u32 *nsec, u32 *sub_nsec) 1256 { 1257 struct lan743x_ptp *ptp = &adapter->ptp; 1258 1259 mutex_lock(&ptp->command_lock); 1260 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_); 1261 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_); 1262 1263 if (sec) 1264 (*sec) = lan743x_csr_read(adapter, PTP_LTC_RD_SEC_LO); 1265 1266 if (nsec) 1267 (*nsec) = lan743x_csr_read(adapter, PTP_LTC_RD_NS); 1268 1269 if (sub_nsec) 1270 (*sub_nsec) = 1271 lan743x_csr_read(adapter, PTP_LTC_RD_SUBNS); 1272 1273 mutex_unlock(&ptp->command_lock); 1274 } 1275 1276 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter, 1277 s64 time_step_ns) 1278 { 1279 struct lan743x_ptp *ptp = &adapter->ptp; 1280 u32 nano_seconds_step = 0; 1281 u64 abs_time_step_ns = 0; 1282 u32 unsigned_seconds = 0; 1283 u32 nano_seconds = 0; 1284 u32 remainder = 0; 1285 s32 seconds = 0; 1286 1287 if (time_step_ns > 15000000000LL) { 1288 /* convert to clock set */ 1289 if (adapter->is_pci11x1x) 1290 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds, 1291 &nano_seconds, NULL); 1292 else 1293 lan743x_ptp_clock_get(adapter, &unsigned_seconds, 1294 &nano_seconds, NULL); 1295 unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL, 1296 &remainder); 1297 nano_seconds += remainder; 1298 if (nano_seconds >= 1000000000) { 1299 unsigned_seconds++; 1300 nano_seconds -= 1000000000; 1301 } 1302 lan743x_ptp_clock_set(adapter, unsigned_seconds, 1303 nano_seconds, 0); 1304 return; 1305 } else if (time_step_ns < -15000000000LL) { 1306 /* convert to clock set */ 1307 time_step_ns = -time_step_ns; 1308 1309 if (adapter->is_pci11x1x) { 1310 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds, 1311 &nano_seconds, NULL); 1312 } else { 1313 lan743x_ptp_clock_get(adapter, &unsigned_seconds, 1314 &nano_seconds, NULL); 1315 } 1316 unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL, 1317 &remainder); 1318 nano_seconds_step = remainder; 1319 if (nano_seconds < nano_seconds_step) { 1320 unsigned_seconds--; 1321 nano_seconds += 1000000000; 1322 } 1323 nano_seconds -= nano_seconds_step; 1324 lan743x_ptp_clock_set(adapter, unsigned_seconds, 1325 nano_seconds, 0); 1326 return; 1327 } 1328 1329 /* do clock step */ 1330 if (time_step_ns >= 0) { 1331 abs_time_step_ns = (u64)(time_step_ns); 1332 seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000, 1333 &remainder); 1334 nano_seconds = (u32)remainder; 1335 } else { 1336 abs_time_step_ns = (u64)(-time_step_ns); 1337 seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000, 1338 &remainder)); 1339 nano_seconds = (u32)remainder; 1340 if (nano_seconds > 0) { 1341 /* subtracting nano seconds is not allowed 1342 * convert to subtracting from seconds, 1343 * and adding to nanoseconds 1344 */ 1345 seconds--; 1346 nano_seconds = (1000000000 - nano_seconds); 1347 } 1348 } 1349 1350 if (nano_seconds > 0) { 1351 /* add 8 ns to cover the likely normal increment */ 1352 nano_seconds += 8; 1353 } 1354 1355 if (nano_seconds >= 1000000000) { 1356 /* carry into seconds */ 1357 seconds++; 1358 nano_seconds -= 1000000000; 1359 } 1360 1361 while (seconds) { 1362 mutex_lock(&ptp->command_lock); 1363 if (seconds > 0) { 1364 u32 adjustment_value = (u32)seconds; 1365 1366 if (adjustment_value > 0xF) 1367 adjustment_value = 0xF; 1368 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, 1369 PTP_CLOCK_STEP_ADJ_DIR_ | 1370 adjustment_value); 1371 seconds -= ((s32)adjustment_value); 1372 } else { 1373 u32 adjustment_value = (u32)(-seconds); 1374 1375 if (adjustment_value > 0xF) 1376 adjustment_value = 0xF; 1377 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, 1378 adjustment_value); 1379 seconds += ((s32)adjustment_value); 1380 } 1381 lan743x_csr_write(adapter, PTP_CMD_CTL, 1382 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_); 1383 lan743x_ptp_wait_till_cmd_done(adapter, 1384 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_); 1385 mutex_unlock(&ptp->command_lock); 1386 } 1387 if (nano_seconds) { 1388 mutex_lock(&ptp->command_lock); 1389 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ, 1390 PTP_CLOCK_STEP_ADJ_DIR_ | 1391 (nano_seconds & 1392 PTP_CLOCK_STEP_ADJ_VALUE_MASK_)); 1393 lan743x_csr_write(adapter, PTP_CMD_CTL, 1394 PTP_CMD_CTL_PTP_CLK_STP_NSEC_); 1395 lan743x_ptp_wait_till_cmd_done(adapter, 1396 PTP_CMD_CTL_PTP_CLK_STP_NSEC_); 1397 mutex_unlock(&ptp->command_lock); 1398 } 1399 } 1400 1401 void lan743x_ptp_isr(void *context) 1402 { 1403 struct lan743x_adapter *adapter = (struct lan743x_adapter *)context; 1404 struct lan743x_ptp *ptp = NULL; 1405 int enable_flag = 1; 1406 u32 ptp_int_sts = 0; 1407 1408 ptp = &adapter->ptp; 1409 1410 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_); 1411 1412 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS); 1413 ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET); 1414 1415 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) { 1416 ptp_schedule_worker(ptp->ptp_clock, 0); 1417 enable_flag = 0;/* tasklet will re-enable later */ 1418 } 1419 if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) { 1420 netif_err(adapter, drv, adapter->netdev, 1421 "PTP TX Software Timestamp Error\n"); 1422 /* clear int status bit */ 1423 lan743x_csr_write(adapter, PTP_INT_STS, 1424 PTP_INT_BIT_TX_SWTS_ERR_); 1425 } 1426 if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) { 1427 /* clear int status bit */ 1428 lan743x_csr_write(adapter, PTP_INT_STS, 1429 PTP_INT_BIT_TIMER_B_); 1430 } 1431 if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) { 1432 /* clear int status bit */ 1433 lan743x_csr_write(adapter, PTP_INT_STS, 1434 PTP_INT_BIT_TIMER_A_); 1435 } 1436 1437 if (enable_flag) { 1438 /* re-enable isr */ 1439 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); 1440 } 1441 } 1442 1443 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter, 1444 struct sk_buff *skb, bool ignore_sync) 1445 { 1446 struct lan743x_ptp *ptp = &adapter->ptp; 1447 1448 spin_lock_bh(&ptp->tx_ts_lock); 1449 if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { 1450 ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb; 1451 if (ignore_sync) 1452 ptp->tx_ts_ignore_sync_queue |= 1453 BIT(ptp->tx_ts_skb_queue_size); 1454 ptp->tx_ts_skb_queue_size++; 1455 } else { 1456 /* this should never happen, so long as the tx channel 1457 * calls and honors the result from 1458 * lan743x_ptp_request_tx_timestamp 1459 */ 1460 netif_err(adapter, drv, adapter->netdev, 1461 "tx ts skb queue overflow\n"); 1462 dev_kfree_skb(skb); 1463 } 1464 spin_unlock_bh(&ptp->tx_ts_lock); 1465 } 1466 1467 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter) 1468 { 1469 struct timespec64 ts; 1470 1471 ktime_get_clocktai_ts64(&ts); 1472 1473 lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0); 1474 } 1475 1476 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter, 1477 u32 link_speed) 1478 { 1479 switch (link_speed) { 1480 case 10: 1481 lan743x_csr_write(adapter, PTP_LATENCY, 1482 PTP_LATENCY_TX_SET_(0) | 1483 PTP_LATENCY_RX_SET_(0)); 1484 break; 1485 case 100: 1486 lan743x_csr_write(adapter, PTP_LATENCY, 1487 PTP_LATENCY_TX_SET_(181) | 1488 PTP_LATENCY_RX_SET_(594)); 1489 break; 1490 case 1000: 1491 lan743x_csr_write(adapter, PTP_LATENCY, 1492 PTP_LATENCY_TX_SET_(30) | 1493 PTP_LATENCY_RX_SET_(525)); 1494 break; 1495 } 1496 } 1497 1498 int lan743x_ptp_init(struct lan743x_adapter *adapter) 1499 { 1500 struct lan743x_ptp *ptp = &adapter->ptp; 1501 int i; 1502 1503 mutex_init(&ptp->command_lock); 1504 spin_lock_init(&ptp->tx_ts_lock); 1505 ptp->used_event_ch = 0; 1506 1507 for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) { 1508 ptp->perout[i].event_ch = -1; 1509 ptp->perout[i].gpio_pin = -1; 1510 } 1511 1512 lan743x_led_mux_save(adapter); 1513 1514 return 0; 1515 } 1516 1517 int lan743x_ptp_open(struct lan743x_adapter *adapter) 1518 { 1519 struct lan743x_ptp *ptp = &adapter->ptp; 1520 int ret = -ENODEV; 1521 u32 temp; 1522 int i; 1523 int n_pins; 1524 1525 lan743x_ptp_reset(adapter); 1526 lan743x_ptp_sync_to_system_clock(adapter); 1527 temp = lan743x_csr_read(adapter, PTP_TX_MOD2); 1528 temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_; 1529 lan743x_csr_write(adapter, PTP_TX_MOD2, temp); 1530 lan743x_ptp_enable(adapter); 1531 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_); 1532 lan743x_csr_write(adapter, PTP_INT_EN_SET, 1533 PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_); 1534 ptp->flags |= PTP_FLAG_ISR_ENABLED; 1535 1536 if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK)) 1537 return 0; 1538 1539 switch (adapter->csr.id_rev & ID_REV_ID_MASK_) { 1540 case ID_REV_ID_LAN7430_: 1541 n_pins = LAN7430_N_GPIO; 1542 break; 1543 case ID_REV_ID_LAN7431_: 1544 case ID_REV_ID_A011_: 1545 case ID_REV_ID_A041_: 1546 n_pins = LAN7431_N_GPIO; 1547 break; 1548 default: 1549 netif_warn(adapter, drv, adapter->netdev, 1550 "Unknown LAN743x (%08x). Assuming no GPIO\n", 1551 adapter->csr.id_rev); 1552 n_pins = 0; 1553 break; 1554 } 1555 1556 if (n_pins > LAN743X_PTP_N_GPIO) 1557 n_pins = LAN743X_PTP_N_GPIO; 1558 1559 for (i = 0; i < n_pins; i++) { 1560 struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i]; 1561 1562 snprintf(ptp_pin->name, 1563 sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i); 1564 ptp_pin->index = i; 1565 ptp_pin->func = PTP_PF_NONE; 1566 } 1567 1568 ptp->ptp_clock_info.owner = THIS_MODULE; 1569 snprintf(ptp->ptp_clock_info.name, 16, "%pm", 1570 adapter->netdev->dev_addr); 1571 ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB; 1572 ptp->ptp_clock_info.n_alarm = 0; 1573 ptp->ptp_clock_info.n_ext_ts = LAN743X_PTP_N_EXTTS; 1574 ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN; 1575 ptp->ptp_clock_info.n_pins = n_pins; 1576 ptp->ptp_clock_info.pps = LAN743X_PTP_N_PPS; 1577 ptp->ptp_clock_info.pin_config = ptp->pin_config; 1578 ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine; 1579 ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq; 1580 ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime; 1581 ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64; 1582 ptp->ptp_clock_info.getcrosststamp = NULL; 1583 ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64; 1584 ptp->ptp_clock_info.enable = lan743x_ptpci_enable; 1585 ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work; 1586 ptp->ptp_clock_info.verify = lan743x_ptpci_verify_pin_config; 1587 1588 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info, 1589 &adapter->pdev->dev); 1590 1591 if (IS_ERR(ptp->ptp_clock)) { 1592 netif_err(adapter, ifup, adapter->netdev, 1593 "ptp_clock_register failed\n"); 1594 goto done; 1595 } 1596 ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED; 1597 netif_info(adapter, ifup, adapter->netdev, 1598 "successfully registered ptp clock\n"); 1599 1600 return 0; 1601 done: 1602 lan743x_ptp_close(adapter); 1603 return ret; 1604 } 1605 1606 void lan743x_ptp_close(struct lan743x_adapter *adapter) 1607 { 1608 struct lan743x_ptp *ptp = &adapter->ptp; 1609 int index; 1610 1611 if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) && 1612 (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED)) { 1613 ptp_clock_unregister(ptp->ptp_clock); 1614 ptp->ptp_clock = NULL; 1615 ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED; 1616 netif_info(adapter, drv, adapter->netdev, 1617 "ptp clock unregister\n"); 1618 } 1619 1620 if (ptp->flags & PTP_FLAG_ISR_ENABLED) { 1621 lan743x_csr_write(adapter, PTP_INT_EN_CLR, 1622 PTP_INT_BIT_TX_SWTS_ERR_ | 1623 PTP_INT_BIT_TX_TS_); 1624 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_); 1625 ptp->flags &= ~PTP_FLAG_ISR_ENABLED; 1626 } 1627 1628 /* clean up pending timestamp requests */ 1629 lan743x_ptp_tx_ts_complete(adapter); 1630 spin_lock_bh(&ptp->tx_ts_lock); 1631 for (index = 0; 1632 index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; 1633 index++) { 1634 struct sk_buff *skb = ptp->tx_ts_skb_queue[index]; 1635 1636 dev_kfree_skb(skb); 1637 ptp->tx_ts_skb_queue[index] = NULL; 1638 ptp->tx_ts_seconds_queue[index] = 0; 1639 ptp->tx_ts_nseconds_queue[index] = 0; 1640 } 1641 ptp->tx_ts_skb_queue_size = 0; 1642 ptp->tx_ts_queue_size = 0; 1643 ptp->pending_tx_timestamps = 0; 1644 spin_unlock_bh(&ptp->tx_ts_lock); 1645 1646 lan743x_led_mux_restore(adapter); 1647 1648 lan743x_ptp_disable(adapter); 1649 } 1650 1651 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter, 1652 bool ts_insert_enable) 1653 { 1654 u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD); 1655 1656 if (ts_insert_enable) 1657 ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_; 1658 else 1659 ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_; 1660 1661 lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod); 1662 } 1663 1664 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter) 1665 { 1666 if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_) 1667 return true; 1668 return false; 1669 } 1670 1671 static void lan743x_ptp_enable(struct lan743x_adapter *adapter) 1672 { 1673 struct lan743x_ptp *ptp = &adapter->ptp; 1674 1675 mutex_lock(&ptp->command_lock); 1676 1677 if (lan743x_ptp_is_enabled(adapter)) { 1678 netif_warn(adapter, drv, adapter->netdev, 1679 "PTP already enabled\n"); 1680 goto done; 1681 } 1682 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_); 1683 done: 1684 mutex_unlock(&ptp->command_lock); 1685 } 1686 1687 static void lan743x_ptp_disable(struct lan743x_adapter *adapter) 1688 { 1689 struct lan743x_ptp *ptp = &adapter->ptp; 1690 1691 mutex_lock(&ptp->command_lock); 1692 if (!lan743x_ptp_is_enabled(adapter)) { 1693 netif_warn(adapter, drv, adapter->netdev, 1694 "PTP already disabled\n"); 1695 goto done; 1696 } 1697 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_); 1698 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_); 1699 done: 1700 mutex_unlock(&ptp->command_lock); 1701 } 1702 1703 static void lan743x_ptp_reset(struct lan743x_adapter *adapter) 1704 { 1705 struct lan743x_ptp *ptp = &adapter->ptp; 1706 1707 mutex_lock(&ptp->command_lock); 1708 1709 if (lan743x_ptp_is_enabled(adapter)) { 1710 netif_err(adapter, drv, adapter->netdev, 1711 "Attempting reset while enabled\n"); 1712 goto done; 1713 } 1714 1715 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_); 1716 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_); 1717 done: 1718 mutex_unlock(&ptp->command_lock); 1719 } 1720 1721 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter, 1722 u32 seconds, u32 nano_seconds, 1723 u32 sub_nano_seconds) 1724 { 1725 struct lan743x_ptp *ptp = &adapter->ptp; 1726 1727 mutex_lock(&ptp->command_lock); 1728 1729 lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds); 1730 lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds); 1731 lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds); 1732 1733 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_); 1734 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_); 1735 mutex_unlock(&ptp->command_lock); 1736 } 1737 1738 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter) 1739 { 1740 struct lan743x_ptp *ptp = &adapter->ptp; 1741 bool result = false; 1742 1743 spin_lock_bh(&ptp->tx_ts_lock); 1744 if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) { 1745 /* request granted */ 1746 ptp->pending_tx_timestamps++; 1747 result = true; 1748 } 1749 spin_unlock_bh(&ptp->tx_ts_lock); 1750 return result; 1751 } 1752 1753 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter) 1754 { 1755 struct lan743x_ptp *ptp = &adapter->ptp; 1756 1757 spin_lock_bh(&ptp->tx_ts_lock); 1758 if (ptp->pending_tx_timestamps > 0) 1759 ptp->pending_tx_timestamps--; 1760 else 1761 netif_err(adapter, drv, adapter->netdev, 1762 "unrequest failed, pending_tx_timestamps==0\n"); 1763 spin_unlock_bh(&ptp->tx_ts_lock); 1764 } 1765 1766 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter, 1767 struct sk_buff *skb, bool ignore_sync) 1768 { 1769 lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync); 1770 1771 lan743x_ptp_tx_ts_complete(adapter); 1772 } 1773 1774 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 1775 { 1776 struct lan743x_adapter *adapter = netdev_priv(netdev); 1777 struct hwtstamp_config config; 1778 int ret = 0; 1779 int index; 1780 1781 if (!ifr) { 1782 netif_err(adapter, drv, adapter->netdev, 1783 "SIOCSHWTSTAMP, ifr == NULL\n"); 1784 return -EINVAL; 1785 } 1786 1787 if (copy_from_user(&config, ifr->ifr_data, sizeof(config))) 1788 return -EFAULT; 1789 1790 switch (config.tx_type) { 1791 case HWTSTAMP_TX_OFF: 1792 for (index = 0; index < adapter->used_tx_channels; 1793 index++) 1794 lan743x_tx_set_timestamping_mode(&adapter->tx[index], 1795 false, false); 1796 lan743x_ptp_set_sync_ts_insert(adapter, false); 1797 break; 1798 case HWTSTAMP_TX_ON: 1799 for (index = 0; index < adapter->used_tx_channels; 1800 index++) 1801 lan743x_tx_set_timestamping_mode(&adapter->tx[index], 1802 true, false); 1803 lan743x_ptp_set_sync_ts_insert(adapter, false); 1804 break; 1805 case HWTSTAMP_TX_ONESTEP_SYNC: 1806 for (index = 0; index < adapter->used_tx_channels; 1807 index++) 1808 lan743x_tx_set_timestamping_mode(&adapter->tx[index], 1809 true, true); 1810 1811 lan743x_ptp_set_sync_ts_insert(adapter, true); 1812 break; 1813 case HWTSTAMP_TX_ONESTEP_P2P: 1814 ret = -ERANGE; 1815 break; 1816 default: 1817 netif_warn(adapter, drv, adapter->netdev, 1818 " tx_type = %d, UNKNOWN\n", config.tx_type); 1819 ret = -EINVAL; 1820 break; 1821 } 1822 1823 if (!ret) 1824 return copy_to_user(ifr->ifr_data, &config, 1825 sizeof(config)) ? -EFAULT : 0; 1826 return ret; 1827 } 1828