drivers/net/ethernet/microchip/lan743x_ptp.c

   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 int lan743x_gpio_init(struct lan743x_adapter *adapter)
  29 {
  30         struct lan743x_gpio *gpio = &adapter->gpio;
  31
  32         spin_lock_init(&gpio->gpio_lock);
  33
  34         gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */
  35         gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */
  36         gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */
  37         gpio->gpio_cfg3 = 0;/* disable all 1588 output */
  38         lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
  39         lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
  40         lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
  41         lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
  42
  43         return 0;
  44 }
  45
  46 static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter,
  47                                            u32 bit_mask)
  48 {
  49         int timeout = 1000;
  50         u32 data = 0;
  51
  52         while (timeout &&
  53                (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) &
  54                bit_mask))) {
  55                 usleep_range(1000, 20000);
  56                 timeout--;
  57         }
  58         if (data) {
  59                 netif_err(adapter, drv, adapter->netdev,
  60                           "timeout waiting for cmd to be done, cmd = 0x%08X\n",
  61                           bit_mask);
  62         }
  63 }
  64
  65 static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter,
  66                                          u32 seconds, u32 nano_seconds,
  67                                          u32 header)
  68 {
  69         struct lan743x_ptp *ptp = &adapter->ptp;
  70
  71         spin_lock_bh(&ptp->tx_ts_lock);
  72         if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
  73                 ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds;
  74                 ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds;
  75                 ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header;
  76                 ptp->tx_ts_queue_size++;
  77         } else {
  78                 netif_err(adapter, drv, adapter->netdev,
  79                           "tx ts queue overflow\n");
  80         }
  81         spin_unlock_bh(&ptp->tx_ts_lock);
  82 }
  83
  84 static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter)
  85 {
  86         struct lan743x_ptp *ptp = &adapter->ptp;
  87         struct skb_shared_hwtstamps tstamps;
  88         u32 header, nseconds, seconds;
  89         bool ignore_sync = false;
  90         struct sk_buff *skb;
  91         int c, i;
  92
  93         spin_lock_bh(&ptp->tx_ts_lock);
  94         c = ptp->tx_ts_skb_queue_size;
  95
  96         if (c > ptp->tx_ts_queue_size)
  97                 c = ptp->tx_ts_queue_size;
  98         if (c <= 0)
  99                 goto done;
 100
 101         for (i = 0; i < c; i++) {
 102                 ignore_sync = ((ptp->tx_ts_ignore_sync_queue &
 103                                 BIT(i)) != 0);
 104                 skb = ptp->tx_ts_skb_queue[i];
 105                 nseconds = ptp->tx_ts_nseconds_queue[i];
 106                 seconds = ptp->tx_ts_seconds_queue[i];
 107                 header = ptp->tx_ts_header_queue[i];
 108
 109                 memset(&tstamps, 0, sizeof(tstamps));
 110                 tstamps.hwtstamp = ktime_set(seconds, nseconds);
 111                 if (!ignore_sync ||
 112                     ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) !=
 113                     PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_))
 114                         skb_tstamp_tx(skb, &tstamps);
 115
 116                 dev_kfree_skb(skb);
 117
 118                 ptp->tx_ts_skb_queue[i] = NULL;
 119                 ptp->tx_ts_seconds_queue[i] = 0;
 120                 ptp->tx_ts_nseconds_queue[i] = 0;
 121                 ptp->tx_ts_header_queue[i] = 0;
 122         }
 123
 124         /* shift queue */
 125         ptp->tx_ts_ignore_sync_queue >>= c;
 126         for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) {
 127                 ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i];
 128                 ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i];
 129                 ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i];
 130                 ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i];
 131
 132                 ptp->tx_ts_skb_queue[i] = NULL;
 133                 ptp->tx_ts_seconds_queue[i] = 0;
 134                 ptp->tx_ts_nseconds_queue[i] = 0;
 135                 ptp->tx_ts_header_queue[i] = 0;
 136         }
 137         ptp->tx_ts_skb_queue_size -= c;
 138         ptp->tx_ts_queue_size -= c;
 139 done:
 140         ptp->pending_tx_timestamps -= c;
 141         spin_unlock_bh(&ptp->tx_ts_lock);
 142 }
 143
 144 static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter,
 145                                         int event_channel)
 146 {
 147         struct lan743x_ptp *ptp = &adapter->ptp;
 148         int result = -ENODEV;
 149
 150         mutex_lock(&ptp->command_lock);
 151         if (!(test_bit(event_channel, &ptp->used_event_ch))) {
 152                 ptp->used_event_ch |= BIT(event_channel);
 153                 result = event_channel;
 154         } else {
 155                 netif_warn(adapter, drv, adapter->netdev,
 156                            "attempted to reserved a used event_channel = %d\n",
 157                            event_channel);
 158         }
 159         mutex_unlock(&ptp->command_lock);
 160         return result;
 161 }
 162
 163 static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
 164                                          int event_channel)
 165 {
 166         struct lan743x_ptp *ptp = &adapter->ptp;
 167
 168         mutex_lock(&ptp->command_lock);
 169         if (test_bit(event_channel, &ptp->used_event_ch)) {
 170                 ptp->used_event_ch &= ~BIT(event_channel);
 171         } else {
 172                 netif_warn(adapter, drv, adapter->netdev,
 173                            "attempted release on a not used event_channel = %d\n",
 174                            event_channel);
 175         }
 176         mutex_unlock(&ptp->command_lock);
 177 }
 178
 179 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
 180                                   u32 *seconds, u32 *nano_seconds,
 181                                   u32 *sub_nano_seconds);
 182 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
 183                                    s64 time_step_ns);
 184
 185 static void lan743x_led_mux_enable(struct lan743x_adapter *adapter,
 186                                    int pin, bool enable)
 187 {
 188         struct lan743x_ptp *ptp = &adapter->ptp;
 189
 190         if (ptp->leds_multiplexed &&
 191             ptp->led_enabled[pin]) {
 192                 u32 val = lan743x_csr_read(adapter, HW_CFG);
 193
 194                 if (enable)
 195                         val |= LAN743X_LED_ENABLE(pin);
 196                 else
 197                         val &= ~LAN743X_LED_ENABLE(pin);
 198
 199                 lan743x_csr_write(adapter, HW_CFG, val);
 200         }
 201 }
 202
 203 static void lan743x_led_mux_save(struct lan743x_adapter *adapter)
 204 {
 205         struct lan743x_ptp *ptp = &adapter->ptp;
 206         u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
 207
 208         if (id_rev == ID_REV_ID_LAN7430_) {
 209                 int i;
 210                 u32 val = lan743x_csr_read(adapter, HW_CFG);
 211
 212                 for (i = 0; i < LAN7430_N_LED; i++) {
 213                         bool led_enabled = (val & LAN743X_LED_ENABLE(i)) != 0;
 214
 215                         ptp->led_enabled[i] = led_enabled;
 216                 }
 217                 ptp->leds_multiplexed = true;
 218         } else {
 219                 ptp->leds_multiplexed = false;
 220         }
 221 }
 222
 223 static void lan743x_led_mux_restore(struct lan743x_adapter *adapter)
 224 {
 225         u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
 226
 227         if (id_rev == ID_REV_ID_LAN7430_) {
 228                 int i;
 229
 230                 for (i = 0; i < LAN7430_N_LED; i++)
 231                         lan743x_led_mux_enable(adapter, i, true);
 232         }
 233 }
 234
 235 static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter,
 236                                      int pin, int event_channel)
 237 {
 238         struct lan743x_gpio *gpio = &adapter->gpio;
 239         unsigned long irq_flags = 0;
 240         int bit_mask = BIT(pin);
 241         int ret = -EBUSY;
 242
 243         spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
 244
 245         if (!(gpio->used_bits & bit_mask)) {
 246                 gpio->used_bits |= bit_mask;
 247                 gpio->output_bits |= bit_mask;
 248                 gpio->ptp_bits |= bit_mask;
 249
 250                 /* assign pin to GPIO function */
 251                 lan743x_led_mux_enable(adapter, pin, false);
 252
 253                 /* set as output, and zero initial value */
 254                 gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(pin);
 255                 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
 256                 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
 257
 258                 /* enable gpio, and set buffer type to push pull */
 259                 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(pin);
 260                 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(pin);
 261                 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
 262
 263                 /* set 1588 polarity to high */
 264                 gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(pin);
 265                 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
 266
 267                 if (event_channel == 0) {
 268                         /* use channel A */
 269                         gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(pin);
 270                 } else {
 271                         /* use channel B */
 272                         gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(pin);
 273                 }
 274                 gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(pin);
 275                 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
 276
 277                 ret = pin;
 278         }
 279         spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
 280         return ret;
 281 }
 282
 283 static void lan743x_gpio_release(struct lan743x_adapter *adapter, int pin)
 284 {
 285         struct lan743x_gpio *gpio = &adapter->gpio;
 286         unsigned long irq_flags = 0;
 287         int bit_mask = BIT(pin);
 288
 289         spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
 290         if (gpio->used_bits & bit_mask) {
 291                 gpio->used_bits &= ~bit_mask;
 292                 if (gpio->output_bits & bit_mask) {
 293                         gpio->output_bits &= ~bit_mask;
 294
 295                         if (gpio->ptp_bits & bit_mask) {
 296                                 gpio->ptp_bits &= ~bit_mask;
 297                                 /* disable ptp output */
 298                                 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(pin);
 299                                 lan743x_csr_write(adapter, GPIO_CFG3,
 300                                                   gpio->gpio_cfg3);
 301                         }
 302                         /* release gpio output */
 303
 304                         /* disable gpio */
 305                         gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(pin);
 306                         gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(pin);
 307                         lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
 308
 309                         /* reset back to input */
 310                         gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(pin);
 311                         gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
 312                         lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
 313
 314                         /* assign pin to original function */
 315                         lan743x_led_mux_enable(adapter, pin, true);
 316                 }
 317         }
 318         spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
 319 }
 320
 321 static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm)
 322 {
 323         struct lan743x_ptp *ptp =
 324                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 325         struct lan743x_adapter *adapter =
 326                 container_of(ptp, struct lan743x_adapter, ptp);
 327         u32 lan743x_rate_adj = 0;
 328         bool positive = true;
 329         u64 u64_delta = 0;
 330
 331         if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
 332             scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
 333                 return -EINVAL;
 334         }
 335         if (scaled_ppm > 0) {
 336                 u64_delta = (u64)scaled_ppm;
 337                 positive = true;
 338         } else {
 339                 u64_delta = (u64)(-scaled_ppm);
 340                 positive = false;
 341         }
 342         u64_delta = (u64_delta << 19);
 343         lan743x_rate_adj = div_u64(u64_delta, 1000000);
 344
 345         if (positive)
 346                 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
 347
 348         lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
 349                           lan743x_rate_adj);
 350
 351         return 0;
 352 }
 353
 354 static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
 355 {
 356         struct lan743x_ptp *ptp =
 357                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 358         struct lan743x_adapter *adapter =
 359                 container_of(ptp, struct lan743x_adapter, ptp);
 360         u32 lan743x_rate_adj = 0;
 361         bool positive = true;
 362         u32 u32_delta = 0;
 363         u64 u64_delta = 0;
 364
 365         if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) ||
 366             delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) {
 367                 return -EINVAL;
 368         }
 369         if (delta_ppb > 0) {
 370                 u32_delta = (u32)delta_ppb;
 371                 positive = true;
 372         } else {
 373                 u32_delta = (u32)(-delta_ppb);
 374                 positive = false;
 375         }
 376         u64_delta = (((u64)u32_delta) << 35);
 377         lan743x_rate_adj = div_u64(u64_delta, 1000000000);
 378
 379         if (positive)
 380                 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
 381
 382         lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
 383                           lan743x_rate_adj);
 384
 385         return 0;
 386 }
 387
 388 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
 389 {
 390         struct lan743x_ptp *ptp =
 391                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 392         struct lan743x_adapter *adapter =
 393                 container_of(ptp, struct lan743x_adapter, ptp);
 394
 395         lan743x_ptp_clock_step(adapter, delta);
 396
 397         return 0;
 398 }
 399
 400 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
 401                                    struct timespec64 *ts)
 402 {
 403         struct lan743x_ptp *ptp =
 404                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 405         struct lan743x_adapter *adapter =
 406                 container_of(ptp, struct lan743x_adapter, ptp);
 407         u32 nano_seconds = 0;
 408         u32 seconds = 0;
 409
 410         lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
 411         ts->tv_sec = seconds;
 412         ts->tv_nsec = nano_seconds;
 413
 414         return 0;
 415 }
 416
 417 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
 418                                    const struct timespec64 *ts)
 419 {
 420         struct lan743x_ptp *ptp =
 421                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 422         struct lan743x_adapter *adapter =
 423                 container_of(ptp, struct lan743x_adapter, ptp);
 424         u32 nano_seconds = 0;
 425         u32 seconds = 0;
 426
 427         if (ts) {
 428                 if (ts->tv_sec > 0xFFFFFFFFLL ||
 429                     ts->tv_sec < 0) {
 430                         netif_warn(adapter, drv, adapter->netdev,
 431                                    "ts->tv_sec out of range, %lld\n",
 432                                    ts->tv_sec);
 433                         return -ERANGE;
 434                 }
 435                 if (ts->tv_nsec >= 1000000000L ||
 436                     ts->tv_nsec < 0) {
 437                         netif_warn(adapter, drv, adapter->netdev,
 438                                    "ts->tv_nsec out of range, %ld\n",
 439                                    ts->tv_nsec);
 440                         return -ERANGE;
 441                 }
 442                 seconds = ts->tv_sec;
 443                 nano_seconds = ts->tv_nsec;
 444                 lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
 445         } else {
 446                 netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n");
 447                 return -EINVAL;
 448         }
 449
 450         return 0;
 451 }
 452
 453 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter,
 454                                    unsigned int index)
 455 {
 456         struct lan743x_ptp *ptp = &adapter->ptp;
 457         u32 general_config = 0;
 458         struct lan743x_ptp_perout *perout = &ptp->perout[index];
 459
 460         if (perout->gpio_pin >= 0) {
 461                 lan743x_gpio_release(adapter, perout->gpio_pin);
 462                 perout->gpio_pin = -1;
 463         }
 464
 465         if (perout->event_ch >= 0) {
 466                 /* set target to far in the future, effectively disabling it */
 467                 lan743x_csr_write(adapter,
 468                                   PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
 469                                   0xFFFF0000);
 470                 lan743x_csr_write(adapter,
 471                                   PTP_CLOCK_TARGET_NS_X(perout->event_ch),
 472                                   0);
 473
 474                 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
 475                 general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
 476                                   (perout->event_ch);
 477                 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
 478                 lan743x_ptp_release_event_ch(adapter, perout->event_ch);
 479                 perout->event_ch = -1;
 480         }
 481 }
 482
 483 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
 484                               struct ptp_perout_request *perout_request)
 485 {
 486         struct lan743x_ptp *ptp = &adapter->ptp;
 487         u32 period_sec = 0, period_nsec = 0;
 488         u32 start_sec = 0, start_nsec = 0;
 489         u32 general_config = 0;
 490         int pulse_width = 0;
 491         int perout_pin = 0;
 492         unsigned int index = perout_request->index;
 493         struct lan743x_ptp_perout *perout = &ptp->perout[index];
 494
 495         /* Reject requests with unsupported flags */
 496         if (perout_request->flags)
 497                 return -EOPNOTSUPP;
 498
 499         if (on) {
 500                 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
 501                                           perout_request->index);
 502                 if (perout_pin < 0)
 503                         return -EBUSY;
 504         } else {
 505                 lan743x_ptp_perout_off(adapter, index);
 506                 return 0;
 507         }
 508
 509         if (perout->event_ch >= 0 ||
 510             perout->gpio_pin >= 0) {
 511                 /* already on, turn off first */
 512                 lan743x_ptp_perout_off(adapter, index);
 513         }
 514
 515         perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
 516
 517         if (perout->event_ch < 0) {
 518                 netif_warn(adapter, drv, adapter->netdev,
 519                            "Failed to reserve event channel %d for PEROUT\n",
 520                            index);
 521                 goto failed;
 522         }
 523
 524         perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter,
 525                                                      perout_pin,
 526                                                      perout->event_ch);
 527
 528         if (perout->gpio_pin < 0) {
 529                 netif_warn(adapter, drv, adapter->netdev,
 530                            "Failed to reserve gpio %d for PEROUT\n",
 531                            perout_pin);
 532                 goto failed;
 533         }
 534
 535         start_sec = perout_request->start.sec;
 536         start_sec += perout_request->start.nsec / 1000000000;
 537         start_nsec = perout_request->start.nsec % 1000000000;
 538
 539         period_sec = perout_request->period.sec;
 540         period_sec += perout_request->period.nsec / 1000000000;
 541         period_nsec = perout_request->period.nsec % 1000000000;
 542
 543         if (period_sec == 0) {
 544                 if (period_nsec >= 400000000) {
 545                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
 546                 } else if (period_nsec >= 20000000) {
 547                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
 548                 } else if (period_nsec >= 2000000) {
 549                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
 550                 } else if (period_nsec >= 200000) {
 551                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
 552                 } else if (period_nsec >= 20000) {
 553                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
 554                 } else if (period_nsec >= 200) {
 555                         pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
 556                 } else {
 557                         netif_warn(adapter, drv, adapter->netdev,
 558                                    "perout period too small, minimum is 200nS\n");
 559                         goto failed;
 560                 }
 561         } else {
 562                 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
 563         }
 564
 565         /* turn off by setting target far in future */
 566         lan743x_csr_write(adapter,
 567                           PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
 568                           0xFFFF0000);
 569         lan743x_csr_write(adapter,
 570                           PTP_CLOCK_TARGET_NS_X(perout->event_ch), 0);
 571
 572         /* Configure to pulse every period */
 573         general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
 574         general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
 575                           (perout->event_ch));
 576         general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
 577                           (perout->event_ch, pulse_width);
 578         general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
 579                           (perout->event_ch);
 580         lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
 581
 582         /* set the reload to one toggle cycle */
 583         lan743x_csr_write(adapter,
 584                           PTP_CLOCK_TARGET_RELOAD_SEC_X(perout->event_ch),
 585                           period_sec);
 586         lan743x_csr_write(adapter,
 587                           PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch),
 588                           period_nsec);
 589
 590         /* set the start time */
 591         lan743x_csr_write(adapter,
 592                           PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
 593                           start_sec);
 594         lan743x_csr_write(adapter,
 595                           PTP_CLOCK_TARGET_NS_X(perout->event_ch),
 596                           start_nsec);
 597
 598         return 0;
 599
 600 failed:
 601         lan743x_ptp_perout_off(adapter, index);
 602         return -ENODEV;
 603 }
 604
 605 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
 606                                 struct ptp_clock_request *request, int on)
 607 {
 608         struct lan743x_ptp *ptp =
 609                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 610         struct lan743x_adapter *adapter =
 611                 container_of(ptp, struct lan743x_adapter, ptp);
 612
 613         if (request) {
 614                 switch (request->type) {
 615                 case PTP_CLK_REQ_EXTTS:
 616                         return -EINVAL;
 617                 case PTP_CLK_REQ_PEROUT:
 618                         if (request->perout.index < ptpci->n_per_out)
 619                                 return lan743x_ptp_perout(adapter, on,
 620                                                           &request->perout);
 621                         return -EINVAL;
 622                 case PTP_CLK_REQ_PPS:
 623                         return -EINVAL;
 624                 default:
 625                         netif_err(adapter, drv, adapter->netdev,
 626                                   "request->type == %d, Unknown\n",
 627                                   request->type);
 628                         break;
 629                 }
 630         } else {
 631                 netif_err(adapter, drv, adapter->netdev, "request == NULL\n");
 632         }
 633         return 0;
 634 }
 635
 636 static int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp,
 637                                            unsigned int pin,
 638                                            enum ptp_pin_function func,
 639                                            unsigned int chan)
 640 {
 641         int result = 0;
 642
 643         /* Confirm the requested function is supported. Parameter
 644          * validation is done by the caller.
 645          */
 646         switch (func) {
 647         case PTP_PF_NONE:
 648         case PTP_PF_PEROUT:
 649                 break;
 650         case PTP_PF_EXTTS:
 651         case PTP_PF_PHYSYNC:
 652         default:
 653                 result = -1;
 654                 break;
 655         }
 656         return result;
 657 }
 658
 659 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci)
 660 {
 661         struct lan743x_ptp *ptp =
 662                 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
 663         struct lan743x_adapter *adapter =
 664                 container_of(ptp, struct lan743x_adapter, ptp);
 665         u32 cap_info, cause, header, nsec, seconds;
 666         bool new_timestamp_available = false;
 667         int count = 0;
 668
 669         while ((count < 100) &&
 670                (lan743x_csr_read(adapter, PTP_INT_STS) & PTP_INT_BIT_TX_TS_)) {
 671                 count++;
 672                 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
 673
 674                 if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
 675                         seconds = lan743x_csr_read(adapter,
 676                                                    PTP_TX_EGRESS_SEC);
 677                         nsec = lan743x_csr_read(adapter, PTP_TX_EGRESS_NS);
 678                         cause = (nsec &
 679                                  PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
 680                         header = lan743x_csr_read(adapter,
 681                                                   PTP_TX_MSG_HEADER);
 682
 683                         if (cause == PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
 684                                 nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
 685                                 lan743x_ptp_tx_ts_enqueue_ts(adapter,
 686                                                              seconds, nsec,
 687                                                              header);
 688                                 new_timestamp_available = true;
 689                         } else if (cause ==
 690                                 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
 691                                 netif_err(adapter, drv, adapter->netdev,
 692                                           "Auto capture cause not supported\n");
 693                         } else {
 694                                 netif_warn(adapter, drv, adapter->netdev,
 695                                            "unknown tx timestamp capture cause\n");
 696                         }
 697                 } else {
 698                         netif_warn(adapter, drv, adapter->netdev,
 699                                    "TX TS INT but no TX TS CNT\n");
 700                 }
 701                 lan743x_csr_write(adapter, PTP_INT_STS, PTP_INT_BIT_TX_TS_);
 702         }
 703
 704         if (new_timestamp_available)
 705                 lan743x_ptp_tx_ts_complete(adapter);
 706
 707         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
 708
 709         return -1;
 710 }
 711
 712 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
 713                                   u32 *seconds, u32 *nano_seconds,
 714                                   u32 *sub_nano_seconds)
 715 {
 716         struct lan743x_ptp *ptp = &adapter->ptp;
 717
 718         mutex_lock(&ptp->command_lock);
 719
 720         lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
 721         lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
 722
 723         if (seconds)
 724                 (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
 725
 726         if (nano_seconds)
 727                 (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
 728
 729         if (sub_nano_seconds)
 730                 (*sub_nano_seconds) =
 731                 lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
 732
 733         mutex_unlock(&ptp->command_lock);
 734 }
 735
 736 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
 737                                    s64 time_step_ns)
 738 {
 739         struct lan743x_ptp *ptp = &adapter->ptp;
 740         u32 nano_seconds_step = 0;
 741         u64 abs_time_step_ns = 0;
 742         u32 unsigned_seconds = 0;
 743         u32 nano_seconds = 0;
 744         u32 remainder = 0;
 745         s32 seconds = 0;
 746
 747         if (time_step_ns >  15000000000LL) {
 748                 /* convert to clock set */
 749                 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
 750                                       &nano_seconds, NULL);
 751                 unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL,
 752                                                 &remainder);
 753                 nano_seconds += remainder;
 754                 if (nano_seconds >= 1000000000) {
 755                         unsigned_seconds++;
 756                         nano_seconds -= 1000000000;
 757                 }
 758                 lan743x_ptp_clock_set(adapter, unsigned_seconds,
 759                                       nano_seconds, 0);
 760                 return;
 761         } else if (time_step_ns < -15000000000LL) {
 762                 /* convert to clock set */
 763                 time_step_ns = -time_step_ns;
 764
 765                 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
 766                                       &nano_seconds, NULL);
 767                 unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
 768                                                 &remainder);
 769                 nano_seconds_step = remainder;
 770                 if (nano_seconds < nano_seconds_step) {
 771                         unsigned_seconds--;
 772                         nano_seconds += 1000000000;
 773                 }
 774                 nano_seconds -= nano_seconds_step;
 775                 lan743x_ptp_clock_set(adapter, unsigned_seconds,
 776                                       nano_seconds, 0);
 777                 return;
 778         }
 779
 780         /* do clock step */
 781         if (time_step_ns >= 0) {
 782                 abs_time_step_ns = (u64)(time_step_ns);
 783                 seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
 784                                            &remainder);
 785                 nano_seconds = (u32)remainder;
 786         } else {
 787                 abs_time_step_ns = (u64)(-time_step_ns);
 788                 seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
 789                                              &remainder));
 790                 nano_seconds = (u32)remainder;
 791                 if (nano_seconds > 0) {
 792                         /* subtracting nano seconds is not allowed
 793                          * convert to subtracting from seconds,
 794                          * and adding to nanoseconds
 795                          */
 796                         seconds--;
 797                         nano_seconds = (1000000000 - nano_seconds);
 798                 }
 799         }
 800
 801         if (nano_seconds > 0) {
 802                 /* add 8 ns to cover the likely normal increment */
 803                 nano_seconds += 8;
 804         }
 805
 806         if (nano_seconds >= 1000000000) {
 807                 /* carry into seconds */
 808                 seconds++;
 809                 nano_seconds -= 1000000000;
 810         }
 811
 812         while (seconds) {
 813                 mutex_lock(&ptp->command_lock);
 814                 if (seconds > 0) {
 815                         u32 adjustment_value = (u32)seconds;
 816
 817                         if (adjustment_value > 0xF)
 818                                 adjustment_value = 0xF;
 819                         lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
 820                                           PTP_CLOCK_STEP_ADJ_DIR_ |
 821                                           adjustment_value);
 822                         seconds -= ((s32)adjustment_value);
 823                 } else {
 824                         u32 adjustment_value = (u32)(-seconds);
 825
 826                         if (adjustment_value > 0xF)
 827                                 adjustment_value = 0xF;
 828                         lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
 829                                           adjustment_value);
 830                         seconds += ((s32)adjustment_value);
 831                 }
 832                 lan743x_csr_write(adapter, PTP_CMD_CTL,
 833                                   PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
 834                 lan743x_ptp_wait_till_cmd_done(adapter,
 835                                                PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
 836                 mutex_unlock(&ptp->command_lock);
 837         }
 838         if (nano_seconds) {
 839                 mutex_lock(&ptp->command_lock);
 840                 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
 841                                   PTP_CLOCK_STEP_ADJ_DIR_ |
 842                                   (nano_seconds &
 843                                   PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
 844                 lan743x_csr_write(adapter, PTP_CMD_CTL,
 845                                   PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
 846                 lan743x_ptp_wait_till_cmd_done(adapter,
 847                                                PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
 848                 mutex_unlock(&ptp->command_lock);
 849         }
 850 }
 851
 852 void lan743x_ptp_isr(void *context)
 853 {
 854         struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
 855         struct lan743x_ptp *ptp = NULL;
 856         int enable_flag = 1;
 857         u32 ptp_int_sts = 0;
 858
 859         ptp = &adapter->ptp;
 860
 861         lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
 862
 863         ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
 864         ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET);
 865
 866         if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
 867                 ptp_schedule_worker(ptp->ptp_clock, 0);
 868                 enable_flag = 0;/* tasklet will re-enable later */
 869         }
 870         if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
 871                 netif_err(adapter, drv, adapter->netdev,
 872                           "PTP TX Software Timestamp Error\n");
 873                 /* clear int status bit */
 874                 lan743x_csr_write(adapter, PTP_INT_STS,
 875                                   PTP_INT_BIT_TX_SWTS_ERR_);
 876         }
 877         if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
 878                 /* clear int status bit */
 879                 lan743x_csr_write(adapter, PTP_INT_STS,
 880                                   PTP_INT_BIT_TIMER_B_);
 881         }
 882         if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
 883                 /* clear int status bit */
 884                 lan743x_csr_write(adapter, PTP_INT_STS,
 885                                   PTP_INT_BIT_TIMER_A_);
 886         }
 887
 888         if (enable_flag) {
 889                 /* re-enable isr */
 890                 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
 891         }
 892 }
 893
 894 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
 895                                           struct sk_buff *skb, bool ignore_sync)
 896 {
 897         struct lan743x_ptp *ptp = &adapter->ptp;
 898
 899         spin_lock_bh(&ptp->tx_ts_lock);
 900         if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
 901                 ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
 902                 if (ignore_sync)
 903                         ptp->tx_ts_ignore_sync_queue |=
 904                                 BIT(ptp->tx_ts_skb_queue_size);
 905                 ptp->tx_ts_skb_queue_size++;
 906         } else {
 907                 /* this should never happen, so long as the tx channel
 908                  * calls and honors the result from
 909                  * lan743x_ptp_request_tx_timestamp
 910                  */
 911                 netif_err(adapter, drv, adapter->netdev,
 912                           "tx ts skb queue overflow\n");
 913                 dev_kfree_skb(skb);
 914         }
 915         spin_unlock_bh(&ptp->tx_ts_lock);
 916 }
 917
 918 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
 919 {
 920         struct timespec64 ts;
 921
 922         ktime_get_clocktai_ts64(&ts);
 923
 924         lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0);
 925 }
 926
 927 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
 928                                 u32 link_speed)
 929 {
 930         switch (link_speed) {
 931         case 10:
 932                 lan743x_csr_write(adapter, PTP_LATENCY,
 933                                   PTP_LATENCY_TX_SET_(0) |
 934                                   PTP_LATENCY_RX_SET_(0));
 935                 break;
 936         case 100:
 937                 lan743x_csr_write(adapter, PTP_LATENCY,
 938                                   PTP_LATENCY_TX_SET_(181) |
 939                                   PTP_LATENCY_RX_SET_(594));
 940                 break;
 941         case 1000:
 942                 lan743x_csr_write(adapter, PTP_LATENCY,
 943                                   PTP_LATENCY_TX_SET_(30) |
 944                                   PTP_LATENCY_RX_SET_(525));
 945                 break;
 946         }
 947 }
 948
 949 int lan743x_ptp_init(struct lan743x_adapter *adapter)
 950 {
 951         struct lan743x_ptp *ptp = &adapter->ptp;
 952         int i;
 953
 954         mutex_init(&ptp->command_lock);
 955         spin_lock_init(&ptp->tx_ts_lock);
 956         ptp->used_event_ch = 0;
 957
 958         for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) {
 959                 ptp->perout[i].event_ch = -1;
 960                 ptp->perout[i].gpio_pin = -1;
 961         }
 962
 963         lan743x_led_mux_save(adapter);
 964
 965         return 0;
 966 }
 967
 968 int lan743x_ptp_open(struct lan743x_adapter *adapter)
 969 {
 970         struct lan743x_ptp *ptp = &adapter->ptp;
 971         int ret = -ENODEV;
 972         u32 temp;
 973         int i;
 974         int n_pins;
 975
 976         lan743x_ptp_reset(adapter);
 977         lan743x_ptp_sync_to_system_clock(adapter);
 978         temp = lan743x_csr_read(adapter, PTP_TX_MOD2);
 979         temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_;
 980         lan743x_csr_write(adapter, PTP_TX_MOD2, temp);
 981         lan743x_ptp_enable(adapter);
 982         lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
 983         lan743x_csr_write(adapter, PTP_INT_EN_SET,
 984                           PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
 985         ptp->flags |= PTP_FLAG_ISR_ENABLED;
 986
 987         if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK))
 988                 return 0;
 989
 990         switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
 991         case ID_REV_ID_LAN7430_:
 992                 n_pins = LAN7430_N_GPIO;
 993                 break;
 994         case ID_REV_ID_LAN7431_:
 995                 n_pins = LAN7431_N_GPIO;
 996                 break;
 997         default:
 998                 netif_warn(adapter, drv, adapter->netdev,
 999                            "Unknown LAN743x (%08x). Assuming no GPIO\n",
1000                            adapter->csr.id_rev);
1001                 n_pins = 0;
1002                 break;
1003         }
1004
1005         if (n_pins > LAN743X_PTP_N_GPIO)
1006                 n_pins = LAN743X_PTP_N_GPIO;
1007
1008         for (i = 0; i < n_pins; i++) {
1009                 struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i];
1010
1011                 snprintf(ptp_pin->name,
1012                          sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i);
1013                 ptp_pin->index = i;
1014                 ptp_pin->func = PTP_PF_NONE;
1015         }
1016
1017         ptp->ptp_clock_info.owner = THIS_MODULE;
1018         snprintf(ptp->ptp_clock_info.name, 16, "%pm",
1019                  adapter->netdev->dev_addr);
1020         ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
1021         ptp->ptp_clock_info.n_alarm = 0;
1022         ptp->ptp_clock_info.n_ext_ts = 0;
1023         ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN;
1024         ptp->ptp_clock_info.n_pins = n_pins;
1025         ptp->ptp_clock_info.pps = 0;
1026         ptp->ptp_clock_info.pin_config = ptp->pin_config;
1027         ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
1028         ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq;
1029         ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
1030         ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
1031         ptp->ptp_clock_info.getcrosststamp = NULL;
1032         ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
1033         ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
1034         ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work;
1035         ptp->ptp_clock_info.verify = lan743x_ptpci_verify_pin_config;
1036
1037         ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
1038                                             &adapter->pdev->dev);
1039
1040         if (IS_ERR(ptp->ptp_clock)) {
1041                 netif_err(adapter, ifup, adapter->netdev,
1042                           "ptp_clock_register failed\n");
1043                 goto done;
1044         }
1045         ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
1046         netif_info(adapter, ifup, adapter->netdev,
1047                    "successfully registered ptp clock\n");
1048
1049         return 0;
1050 done:
1051         lan743x_ptp_close(adapter);
1052         return ret;
1053 }
1054
1055 void lan743x_ptp_close(struct lan743x_adapter *adapter)
1056 {
1057         struct lan743x_ptp *ptp = &adapter->ptp;
1058         int index;
1059
1060         if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
1061             (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED)) {
1062                 ptp_clock_unregister(ptp->ptp_clock);
1063                 ptp->ptp_clock = NULL;
1064                 ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
1065                 netif_info(adapter, drv, adapter->netdev,
1066                            "ptp clock unregister\n");
1067         }
1068
1069         if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
1070                 lan743x_csr_write(adapter, PTP_INT_EN_CLR,
1071                                   PTP_INT_BIT_TX_SWTS_ERR_ |
1072                                   PTP_INT_BIT_TX_TS_);
1073                 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1074                 ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
1075         }
1076
1077         /* clean up pending timestamp requests */
1078         lan743x_ptp_tx_ts_complete(adapter);
1079         spin_lock_bh(&ptp->tx_ts_lock);
1080         for (index = 0;
1081                 index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
1082                 index++) {
1083                 struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
1084
1085                 dev_kfree_skb(skb);
1086                 ptp->tx_ts_skb_queue[index] = NULL;
1087                 ptp->tx_ts_seconds_queue[index] = 0;
1088                 ptp->tx_ts_nseconds_queue[index] = 0;
1089         }
1090         ptp->tx_ts_skb_queue_size = 0;
1091         ptp->tx_ts_queue_size = 0;
1092         ptp->pending_tx_timestamps = 0;
1093         spin_unlock_bh(&ptp->tx_ts_lock);
1094
1095         lan743x_led_mux_restore(adapter);
1096
1097         lan743x_ptp_disable(adapter);
1098 }
1099
1100 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter,
1101                                            bool ts_insert_enable)
1102 {
1103         u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD);
1104
1105         if (ts_insert_enable)
1106                 ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1107         else
1108                 ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1109
1110         lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod);
1111 }
1112
1113 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
1114 {
1115         if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
1116                 return true;
1117         return false;
1118 }
1119
1120 static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
1121 {
1122         struct lan743x_ptp *ptp = &adapter->ptp;
1123
1124         mutex_lock(&ptp->command_lock);
1125
1126         if (lan743x_ptp_is_enabled(adapter)) {
1127                 netif_warn(adapter, drv, adapter->netdev,
1128                            "PTP already enabled\n");
1129                 goto done;
1130         }
1131         lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
1132 done:
1133         mutex_unlock(&ptp->command_lock);
1134 }
1135
1136 static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
1137 {
1138         struct lan743x_ptp *ptp = &adapter->ptp;
1139
1140         mutex_lock(&ptp->command_lock);
1141         if (!lan743x_ptp_is_enabled(adapter)) {
1142                 netif_warn(adapter, drv, adapter->netdev,
1143                            "PTP already disabled\n");
1144                 goto done;
1145         }
1146         lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_);
1147         lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
1148 done:
1149         mutex_unlock(&ptp->command_lock);
1150 }
1151
1152 static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
1153 {
1154         struct lan743x_ptp *ptp = &adapter->ptp;
1155
1156         mutex_lock(&ptp->command_lock);
1157
1158         if (lan743x_ptp_is_enabled(adapter)) {
1159                 netif_err(adapter, drv, adapter->netdev,
1160                           "Attempting reset while enabled\n");
1161                 goto done;
1162         }
1163
1164         lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_);
1165         lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
1166 done:
1167         mutex_unlock(&ptp->command_lock);
1168 }
1169
1170 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
1171                                   u32 seconds, u32 nano_seconds,
1172                                   u32 sub_nano_seconds)
1173 {
1174         struct lan743x_ptp *ptp = &adapter->ptp;
1175
1176         mutex_lock(&ptp->command_lock);
1177
1178         lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
1179         lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
1180         lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
1181
1182         lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1183         lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1184         mutex_unlock(&ptp->command_lock);
1185 }
1186
1187 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
1188 {
1189         struct lan743x_ptp *ptp = &adapter->ptp;
1190         bool result = false;
1191
1192         spin_lock_bh(&ptp->tx_ts_lock);
1193         if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1194                 /* request granted */
1195                 ptp->pending_tx_timestamps++;
1196                 result = true;
1197         }
1198         spin_unlock_bh(&ptp->tx_ts_lock);
1199         return result;
1200 }
1201
1202 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
1203 {
1204         struct lan743x_ptp *ptp = &adapter->ptp;
1205
1206         spin_lock_bh(&ptp->tx_ts_lock);
1207         if (ptp->pending_tx_timestamps > 0)
1208                 ptp->pending_tx_timestamps--;
1209         else
1210                 netif_err(adapter, drv, adapter->netdev,
1211                           "unrequest failed, pending_tx_timestamps==0\n");
1212         spin_unlock_bh(&ptp->tx_ts_lock);
1213 }
1214
1215 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
1216                                   struct sk_buff *skb, bool ignore_sync)
1217 {
1218         lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync);
1219
1220         lan743x_ptp_tx_ts_complete(adapter);
1221 }
1222
1223 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1224 {
1225         struct lan743x_adapter *adapter = netdev_priv(netdev);
1226         struct hwtstamp_config config;
1227         int ret = 0;
1228         int index;
1229
1230         if (!ifr) {
1231                 netif_err(adapter, drv, adapter->netdev,
1232                           "SIOCSHWTSTAMP, ifr == NULL\n");
1233                 return -EINVAL;
1234         }
1235
1236         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1237                 return -EFAULT;
1238
1239         if (config.flags) {
1240                 netif_warn(adapter, drv, adapter->netdev,
1241                            "ignoring hwtstamp_config.flags == 0x%08X, expected 0\n",
1242                            config.flags);
1243         }
1244
1245         switch (config.tx_type) {
1246         case HWTSTAMP_TX_OFF:
1247                 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1248                         index++)
1249                         lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1250                                                          false, false);
1251                 lan743x_ptp_set_sync_ts_insert(adapter, false);
1252                 break;
1253         case HWTSTAMP_TX_ON:
1254                 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1255                         index++)
1256                         lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1257                                                          true, false);
1258                 lan743x_ptp_set_sync_ts_insert(adapter, false);
1259                 break;
1260         case HWTSTAMP_TX_ONESTEP_SYNC:
1261                 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1262                         index++)
1263                         lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1264                                                          true, true);
1265
1266                 lan743x_ptp_set_sync_ts_insert(adapter, true);
1267                 break;
1268         case HWTSTAMP_TX_ONESTEP_P2P:
1269                 ret = -ERANGE;
1270                 break;
1271         default:
1272                 netif_warn(adapter, drv, adapter->netdev,
1273                            "  tx_type = %d, UNKNOWN\n", config.tx_type);
1274                 ret = -EINVAL;
1275                 break;
1276         }
1277
1278         if (!ret)
1279                 return copy_to_user(ifr->ifr_data, &config,
1280                         sizeof(config)) ? -EFAULT : 0;
1281         return ret;
1282 }