1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (C) 2021 in-tech smart charging GmbH 3 * 4 * driver is based on micrel/ks8851_spi.c 5 */ 6 7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 8 9 #include <linux/interrupt.h> 10 #include <linux/module.h> 11 #include <linux/kernel.h> 12 #include <linux/netdevice.h> 13 #include <linux/etherdevice.h> 14 #include <linux/ethtool.h> 15 #include <linux/cache.h> 16 #include <linux/debugfs.h> 17 #include <linux/seq_file.h> 18 19 #include <linux/spi/spi.h> 20 #include <linux/of_net.h> 21 22 #define MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \ 23 NETIF_MSG_TIMER) 24 25 #define DRV_NAME "mse102x" 26 27 #define DET_CMD 0x0001 28 #define DET_SOF 0x0002 29 #define DET_DFT 0x55AA 30 31 #define CMD_SHIFT 12 32 #define CMD_RTS (0x1 << CMD_SHIFT) 33 #define CMD_CTR (0x2 << CMD_SHIFT) 34 35 #define CMD_MASK GENMASK(15, CMD_SHIFT) 36 #define LEN_MASK GENMASK(CMD_SHIFT - 1, 0) 37 38 #define DET_CMD_LEN 4 39 #define DET_SOF_LEN 2 40 #define DET_DFT_LEN 2 41 42 #define MIN_FREQ_HZ 6000000 43 #define MAX_FREQ_HZ 7142857 44 45 struct mse102x_stats { 46 u64 xfer_err; 47 u64 invalid_cmd; 48 u64 invalid_ctr; 49 u64 invalid_dft; 50 u64 invalid_len; 51 u64 invalid_rts; 52 u64 invalid_sof; 53 u64 tx_timeout; 54 }; 55 56 static const char mse102x_gstrings_stats[][ETH_GSTRING_LEN] = { 57 "SPI transfer errors", 58 "Invalid command", 59 "Invalid CTR", 60 "Invalid DFT", 61 "Invalid frame length", 62 "Invalid RTS", 63 "Invalid SOF", 64 "TX timeout", 65 }; 66 67 struct mse102x_net { 68 struct net_device *ndev; 69 70 u8 rxd[8]; 71 u8 txd[8]; 72 73 u32 msg_enable ____cacheline_aligned; 74 75 struct sk_buff_head txq; 76 struct mse102x_stats stats; 77 }; 78 79 struct mse102x_net_spi { 80 struct mse102x_net mse102x; 81 struct mutex lock; /* Protect SPI frame transfer */ 82 struct work_struct tx_work; 83 struct spi_device *spidev; 84 struct spi_message spi_msg; 85 struct spi_transfer spi_xfer; 86 87 #ifdef CONFIG_DEBUG_FS 88 struct dentry *device_root; 89 #endif 90 }; 91 92 #define to_mse102x_spi(mse) container_of((mse), struct mse102x_net_spi, mse102x) 93 94 #ifdef CONFIG_DEBUG_FS 95 96 static int mse102x_info_show(struct seq_file *s, void *what) 97 { 98 struct mse102x_net_spi *mses = s->private; 99 100 seq_printf(s, "TX ring size : %u\n", 101 skb_queue_len(&mses->mse102x.txq)); 102 103 seq_printf(s, "IRQ : %d\n", 104 mses->spidev->irq); 105 106 seq_printf(s, "SPI effective speed : %lu\n", 107 (unsigned long)mses->spi_xfer.effective_speed_hz); 108 seq_printf(s, "SPI mode : %x\n", 109 mses->spidev->mode); 110 111 return 0; 112 } 113 DEFINE_SHOW_ATTRIBUTE(mse102x_info); 114 115 static void mse102x_init_device_debugfs(struct mse102x_net_spi *mses) 116 { 117 mses->device_root = debugfs_create_dir(dev_name(&mses->mse102x.ndev->dev), 118 NULL); 119 120 debugfs_create_file("info", S_IFREG | 0444, mses->device_root, mses, 121 &mse102x_info_fops); 122 } 123 124 static void mse102x_remove_device_debugfs(struct mse102x_net_spi *mses) 125 { 126 debugfs_remove_recursive(mses->device_root); 127 } 128 129 #else /* CONFIG_DEBUG_FS */ 130 131 static void mse102x_init_device_debugfs(struct mse102x_net_spi *mses) 132 { 133 } 134 135 static void mse102x_remove_device_debugfs(struct mse102x_net_spi *mses) 136 { 137 } 138 139 #endif 140 141 /* SPI register read/write calls. 142 * 143 * All these calls issue SPI transactions to access the chip's registers. They 144 * all require that the necessary lock is held to prevent accesses when the 145 * chip is busy transferring packet data. 146 */ 147 148 static void mse102x_tx_cmd_spi(struct mse102x_net *mse, u16 cmd) 149 { 150 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 151 struct spi_transfer *xfer = &mses->spi_xfer; 152 struct spi_message *msg = &mses->spi_msg; 153 __be16 txb[2]; 154 int ret; 155 156 txb[0] = cpu_to_be16(DET_CMD); 157 txb[1] = cpu_to_be16(cmd); 158 159 xfer->tx_buf = txb; 160 xfer->rx_buf = NULL; 161 xfer->len = DET_CMD_LEN; 162 163 ret = spi_sync(mses->spidev, msg); 164 if (ret < 0) { 165 netdev_err(mse->ndev, "%s: spi_sync() failed: %d\n", 166 __func__, ret); 167 mse->stats.xfer_err++; 168 } 169 } 170 171 static int mse102x_rx_cmd_spi(struct mse102x_net *mse, u8 *rxb) 172 { 173 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 174 struct spi_transfer *xfer = &mses->spi_xfer; 175 struct spi_message *msg = &mses->spi_msg; 176 __be16 *txb = (__be16 *)mse->txd; 177 __be16 *cmd = (__be16 *)mse->rxd; 178 u8 *trx = mse->rxd; 179 int ret; 180 181 txb[0] = 0; 182 txb[1] = 0; 183 184 xfer->tx_buf = txb; 185 xfer->rx_buf = trx; 186 xfer->len = DET_CMD_LEN; 187 188 ret = spi_sync(mses->spidev, msg); 189 if (ret < 0) { 190 netdev_err(mse->ndev, "%s: spi_sync() failed: %d\n", 191 __func__, ret); 192 mse->stats.xfer_err++; 193 } else if (*cmd != cpu_to_be16(DET_CMD)) { 194 net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n", 195 __func__, *cmd); 196 mse->stats.invalid_cmd++; 197 ret = -EIO; 198 } else { 199 memcpy(rxb, trx + 2, 2); 200 } 201 202 return ret; 203 } 204 205 static inline void mse102x_push_header(struct sk_buff *skb) 206 { 207 __be16 *header = skb_push(skb, DET_SOF_LEN); 208 209 *header = cpu_to_be16(DET_SOF); 210 } 211 212 static inline void mse102x_put_footer(struct sk_buff *skb) 213 { 214 __be16 *footer = skb_put(skb, DET_DFT_LEN); 215 216 *footer = cpu_to_be16(DET_DFT); 217 } 218 219 static int mse102x_tx_frame_spi(struct mse102x_net *mse, struct sk_buff *txp, 220 unsigned int pad) 221 { 222 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 223 struct spi_transfer *xfer = &mses->spi_xfer; 224 struct spi_message *msg = &mses->spi_msg; 225 struct sk_buff *tskb; 226 int ret; 227 228 netif_dbg(mse, tx_queued, mse->ndev, "%s: skb %p, %d@%p\n", 229 __func__, txp, txp->len, txp->data); 230 231 if ((skb_headroom(txp) < DET_SOF_LEN) || 232 (skb_tailroom(txp) < DET_DFT_LEN + pad)) { 233 tskb = skb_copy_expand(txp, DET_SOF_LEN, DET_DFT_LEN + pad, 234 GFP_KERNEL); 235 if (!tskb) 236 return -ENOMEM; 237 238 dev_kfree_skb(txp); 239 txp = tskb; 240 } 241 242 mse102x_push_header(txp); 243 244 if (pad) 245 skb_put_zero(txp, pad); 246 247 mse102x_put_footer(txp); 248 249 xfer->tx_buf = txp->data; 250 xfer->rx_buf = NULL; 251 xfer->len = txp->len; 252 253 ret = spi_sync(mses->spidev, msg); 254 if (ret < 0) { 255 netdev_err(mse->ndev, "%s: spi_sync() failed: %d\n", 256 __func__, ret); 257 mse->stats.xfer_err++; 258 } 259 260 return ret; 261 } 262 263 static int mse102x_rx_frame_spi(struct mse102x_net *mse, u8 *buff, 264 unsigned int frame_len) 265 { 266 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 267 struct spi_transfer *xfer = &mses->spi_xfer; 268 struct spi_message *msg = &mses->spi_msg; 269 __be16 *sof = (__be16 *)buff; 270 __be16 *dft = (__be16 *)(buff + DET_SOF_LEN + frame_len); 271 int ret; 272 273 xfer->rx_buf = buff; 274 xfer->tx_buf = NULL; 275 xfer->len = DET_SOF_LEN + frame_len + DET_DFT_LEN; 276 277 ret = spi_sync(mses->spidev, msg); 278 if (ret < 0) { 279 netdev_err(mse->ndev, "%s: spi_sync() failed: %d\n", 280 __func__, ret); 281 mse->stats.xfer_err++; 282 } else if (*sof != cpu_to_be16(DET_SOF)) { 283 netdev_dbg(mse->ndev, "%s: SPI start of frame is invalid (0x%04x)\n", 284 __func__, *sof); 285 mse->stats.invalid_sof++; 286 ret = -EIO; 287 } else if (*dft != cpu_to_be16(DET_DFT)) { 288 netdev_dbg(mse->ndev, "%s: SPI frame tail is invalid (0x%04x)\n", 289 __func__, *dft); 290 mse->stats.invalid_dft++; 291 ret = -EIO; 292 } 293 294 return ret; 295 } 296 297 static void mse102x_dump_packet(const char *msg, int len, const char *data) 298 { 299 printk(KERN_DEBUG ": %s - packet len:%d\n", msg, len); 300 print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1, 301 data, len, true); 302 } 303 304 static void mse102x_rx_pkt_spi(struct mse102x_net *mse) 305 { 306 struct sk_buff *skb; 307 unsigned int rxalign; 308 unsigned int rxlen; 309 __be16 rx = 0; 310 u16 cmd_resp; 311 u8 *rxpkt; 312 int ret; 313 314 mse102x_tx_cmd_spi(mse, CMD_CTR); 315 ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx); 316 cmd_resp = be16_to_cpu(rx); 317 318 if (ret || ((cmd_resp & CMD_MASK) != CMD_RTS)) { 319 usleep_range(50, 100); 320 321 mse102x_tx_cmd_spi(mse, CMD_CTR); 322 ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx); 323 if (ret) 324 return; 325 326 cmd_resp = be16_to_cpu(rx); 327 if ((cmd_resp & CMD_MASK) != CMD_RTS) { 328 net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n", 329 __func__, cmd_resp); 330 mse->stats.invalid_rts++; 331 return; 332 } 333 334 net_dbg_ratelimited("%s: Unexpected response to first CMD\n", 335 __func__); 336 } 337 338 rxlen = cmd_resp & LEN_MASK; 339 if (!rxlen) { 340 net_dbg_ratelimited("%s: No frame length defined\n", __func__); 341 mse->stats.invalid_len++; 342 return; 343 } 344 345 rxalign = ALIGN(rxlen + DET_SOF_LEN + DET_DFT_LEN, 4); 346 skb = netdev_alloc_skb_ip_align(mse->ndev, rxalign); 347 if (!skb) 348 return; 349 350 /* 2 bytes Start of frame (before ethernet header) 351 * 2 bytes Data frame tail (after ethernet frame) 352 * They are copied, but ignored. 353 */ 354 rxpkt = skb_put(skb, rxlen) - DET_SOF_LEN; 355 if (mse102x_rx_frame_spi(mse, rxpkt, rxlen)) { 356 mse->ndev->stats.rx_errors++; 357 dev_kfree_skb(skb); 358 return; 359 } 360 361 if (netif_msg_pktdata(mse)) 362 mse102x_dump_packet(__func__, skb->len, skb->data); 363 364 skb->protocol = eth_type_trans(skb, mse->ndev); 365 netif_rx(skb); 366 367 mse->ndev->stats.rx_packets++; 368 mse->ndev->stats.rx_bytes += rxlen; 369 } 370 371 static int mse102x_tx_pkt_spi(struct mse102x_net *mse, struct sk_buff *txb, 372 unsigned long work_timeout) 373 { 374 unsigned int pad = 0; 375 __be16 rx = 0; 376 u16 cmd_resp; 377 int ret; 378 bool first = true; 379 380 if (txb->len < 60) 381 pad = 60 - txb->len; 382 383 while (1) { 384 mse102x_tx_cmd_spi(mse, CMD_RTS | (txb->len + pad)); 385 ret = mse102x_rx_cmd_spi(mse, (u8 *)&rx); 386 cmd_resp = be16_to_cpu(rx); 387 388 if (!ret) { 389 /* ready to send frame ? */ 390 if (cmd_resp == CMD_CTR) 391 break; 392 393 net_dbg_ratelimited("%s: Unexpected response (0x%04x)\n", 394 __func__, cmd_resp); 395 mse->stats.invalid_ctr++; 396 } 397 398 /* It's not predictable how long / many retries it takes to 399 * send at least one packet, so TX timeouts are possible. 400 * That's the reason why the netdev watchdog is not used here. 401 */ 402 if (time_after(jiffies, work_timeout)) 403 return -ETIMEDOUT; 404 405 if (first) { 406 /* throttle at first issue */ 407 netif_stop_queue(mse->ndev); 408 /* fast retry */ 409 usleep_range(50, 100); 410 first = false; 411 } else { 412 msleep(20); 413 } 414 } 415 416 ret = mse102x_tx_frame_spi(mse, txb, pad); 417 if (ret) 418 net_dbg_ratelimited("%s: Failed to send (%d), drop frame\n", 419 __func__, ret); 420 421 return ret; 422 } 423 424 #define TX_QUEUE_MAX 10 425 426 static void mse102x_tx_work(struct work_struct *work) 427 { 428 /* Make sure timeout is sufficient to transfer TX_QUEUE_MAX frames */ 429 unsigned long work_timeout = jiffies + msecs_to_jiffies(1000); 430 struct mse102x_net_spi *mses; 431 struct mse102x_net *mse; 432 struct sk_buff *txb; 433 int ret = 0; 434 435 mses = container_of(work, struct mse102x_net_spi, tx_work); 436 mse = &mses->mse102x; 437 438 while ((txb = skb_dequeue(&mse->txq))) { 439 mutex_lock(&mses->lock); 440 ret = mse102x_tx_pkt_spi(mse, txb, work_timeout); 441 mutex_unlock(&mses->lock); 442 if (ret) { 443 mse->ndev->stats.tx_dropped++; 444 } else { 445 mse->ndev->stats.tx_bytes += txb->len; 446 mse->ndev->stats.tx_packets++; 447 } 448 449 dev_kfree_skb(txb); 450 } 451 452 if (ret == -ETIMEDOUT) { 453 if (netif_msg_timer(mse)) 454 netdev_err(mse->ndev, "tx work timeout\n"); 455 456 mse->stats.tx_timeout++; 457 } 458 459 netif_wake_queue(mse->ndev); 460 } 461 462 static netdev_tx_t mse102x_start_xmit_spi(struct sk_buff *skb, 463 struct net_device *ndev) 464 { 465 struct mse102x_net *mse = netdev_priv(ndev); 466 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 467 468 netif_dbg(mse, tx_queued, ndev, 469 "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); 470 471 skb_queue_tail(&mse->txq, skb); 472 473 if (skb_queue_len(&mse->txq) >= TX_QUEUE_MAX) 474 netif_stop_queue(ndev); 475 476 schedule_work(&mses->tx_work); 477 478 return NETDEV_TX_OK; 479 } 480 481 static void mse102x_init_mac(struct mse102x_net *mse, struct device_node *np) 482 { 483 struct net_device *ndev = mse->ndev; 484 int ret = of_get_ethdev_address(np, ndev); 485 486 if (ret) { 487 eth_hw_addr_random(ndev); 488 netdev_err(ndev, "Using random MAC address: %pM\n", 489 ndev->dev_addr); 490 } 491 } 492 493 /* Assumption: this is called for every incoming packet */ 494 static irqreturn_t mse102x_irq(int irq, void *_mse) 495 { 496 struct mse102x_net *mse = _mse; 497 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 498 499 mutex_lock(&mses->lock); 500 mse102x_rx_pkt_spi(mse); 501 mutex_unlock(&mses->lock); 502 503 return IRQ_HANDLED; 504 } 505 506 static int mse102x_net_open(struct net_device *ndev) 507 { 508 struct mse102x_net *mse = netdev_priv(ndev); 509 int ret; 510 511 ret = request_threaded_irq(ndev->irq, NULL, mse102x_irq, IRQF_ONESHOT, 512 ndev->name, mse); 513 if (ret < 0) { 514 netdev_err(ndev, "Failed to get irq: %d\n", ret); 515 return ret; 516 } 517 518 netif_dbg(mse, ifup, ndev, "opening\n"); 519 520 netif_start_queue(ndev); 521 522 netif_carrier_on(ndev); 523 524 netif_dbg(mse, ifup, ndev, "network device up\n"); 525 526 return 0; 527 } 528 529 static int mse102x_net_stop(struct net_device *ndev) 530 { 531 struct mse102x_net *mse = netdev_priv(ndev); 532 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 533 534 netif_info(mse, ifdown, ndev, "shutting down\n"); 535 536 netif_carrier_off(mse->ndev); 537 538 /* stop any outstanding work */ 539 flush_work(&mses->tx_work); 540 541 netif_stop_queue(ndev); 542 543 skb_queue_purge(&mse->txq); 544 545 free_irq(ndev->irq, mse); 546 547 return 0; 548 } 549 550 static const struct net_device_ops mse102x_netdev_ops = { 551 .ndo_open = mse102x_net_open, 552 .ndo_stop = mse102x_net_stop, 553 .ndo_start_xmit = mse102x_start_xmit_spi, 554 .ndo_set_mac_address = eth_mac_addr, 555 .ndo_validate_addr = eth_validate_addr, 556 }; 557 558 /* ethtool support */ 559 560 static void mse102x_get_drvinfo(struct net_device *ndev, 561 struct ethtool_drvinfo *di) 562 { 563 strscpy(di->driver, DRV_NAME, sizeof(di->driver)); 564 strscpy(di->bus_info, dev_name(ndev->dev.parent), sizeof(di->bus_info)); 565 } 566 567 static u32 mse102x_get_msglevel(struct net_device *ndev) 568 { 569 struct mse102x_net *mse = netdev_priv(ndev); 570 571 return mse->msg_enable; 572 } 573 574 static void mse102x_set_msglevel(struct net_device *ndev, u32 to) 575 { 576 struct mse102x_net *mse = netdev_priv(ndev); 577 578 mse->msg_enable = to; 579 } 580 581 static void mse102x_get_ethtool_stats(struct net_device *ndev, 582 struct ethtool_stats *estats, u64 *data) 583 { 584 struct mse102x_net *mse = netdev_priv(ndev); 585 struct mse102x_stats *st = &mse->stats; 586 587 memcpy(data, st, ARRAY_SIZE(mse102x_gstrings_stats) * sizeof(u64)); 588 } 589 590 static void mse102x_get_strings(struct net_device *ndev, u32 stringset, u8 *buf) 591 { 592 switch (stringset) { 593 case ETH_SS_STATS: 594 memcpy(buf, &mse102x_gstrings_stats, 595 sizeof(mse102x_gstrings_stats)); 596 break; 597 default: 598 WARN_ON(1); 599 break; 600 } 601 } 602 603 static int mse102x_get_sset_count(struct net_device *ndev, int sset) 604 { 605 switch (sset) { 606 case ETH_SS_STATS: 607 return ARRAY_SIZE(mse102x_gstrings_stats); 608 default: 609 return -EINVAL; 610 } 611 } 612 613 static const struct ethtool_ops mse102x_ethtool_ops = { 614 .get_drvinfo = mse102x_get_drvinfo, 615 .get_link = ethtool_op_get_link, 616 .get_msglevel = mse102x_get_msglevel, 617 .set_msglevel = mse102x_set_msglevel, 618 .get_ethtool_stats = mse102x_get_ethtool_stats, 619 .get_strings = mse102x_get_strings, 620 .get_sset_count = mse102x_get_sset_count, 621 }; 622 623 /* driver bus management functions */ 624 625 #ifdef CONFIG_PM_SLEEP 626 627 static int mse102x_suspend(struct device *dev) 628 { 629 struct mse102x_net *mse = dev_get_drvdata(dev); 630 struct net_device *ndev = mse->ndev; 631 632 if (netif_running(ndev)) { 633 netif_device_detach(ndev); 634 mse102x_net_stop(ndev); 635 } 636 637 return 0; 638 } 639 640 static int mse102x_resume(struct device *dev) 641 { 642 struct mse102x_net *mse = dev_get_drvdata(dev); 643 struct net_device *ndev = mse->ndev; 644 645 if (netif_running(ndev)) { 646 mse102x_net_open(ndev); 647 netif_device_attach(ndev); 648 } 649 650 return 0; 651 } 652 #endif 653 654 static SIMPLE_DEV_PM_OPS(mse102x_pm_ops, mse102x_suspend, mse102x_resume); 655 656 static int mse102x_probe_spi(struct spi_device *spi) 657 { 658 struct device *dev = &spi->dev; 659 struct mse102x_net_spi *mses; 660 struct net_device *ndev; 661 struct mse102x_net *mse; 662 int ret; 663 664 spi->bits_per_word = 8; 665 spi->mode |= SPI_MODE_3; 666 /* enforce minimum speed to ensure device functionality */ 667 spi->master->min_speed_hz = MIN_FREQ_HZ; 668 669 if (!spi->max_speed_hz) 670 spi->max_speed_hz = MAX_FREQ_HZ; 671 672 if (spi->max_speed_hz < MIN_FREQ_HZ || 673 spi->max_speed_hz > MAX_FREQ_HZ) { 674 dev_err(&spi->dev, "SPI max frequency out of range (min: %u, max: %u)\n", 675 MIN_FREQ_HZ, MAX_FREQ_HZ); 676 return -EINVAL; 677 } 678 679 ret = spi_setup(spi); 680 if (ret < 0) { 681 dev_err(&spi->dev, "Unable to setup SPI device: %d\n", ret); 682 return ret; 683 } 684 685 ndev = devm_alloc_etherdev(dev, sizeof(struct mse102x_net_spi)); 686 if (!ndev) 687 return -ENOMEM; 688 689 ndev->needed_tailroom += ALIGN(DET_DFT_LEN, 4); 690 ndev->needed_headroom += ALIGN(DET_SOF_LEN, 4); 691 ndev->priv_flags &= ~IFF_TX_SKB_SHARING; 692 ndev->tx_queue_len = 100; 693 694 mse = netdev_priv(ndev); 695 mses = to_mse102x_spi(mse); 696 697 mses->spidev = spi; 698 mutex_init(&mses->lock); 699 INIT_WORK(&mses->tx_work, mse102x_tx_work); 700 701 /* initialise pre-made spi transfer messages */ 702 spi_message_init(&mses->spi_msg); 703 spi_message_add_tail(&mses->spi_xfer, &mses->spi_msg); 704 705 ndev->irq = spi->irq; 706 mse->ndev = ndev; 707 708 /* set the default message enable */ 709 mse->msg_enable = netif_msg_init(-1, MSG_DEFAULT); 710 711 skb_queue_head_init(&mse->txq); 712 713 SET_NETDEV_DEV(ndev, dev); 714 715 dev_set_drvdata(dev, mse); 716 717 netif_carrier_off(mse->ndev); 718 ndev->netdev_ops = &mse102x_netdev_ops; 719 ndev->ethtool_ops = &mse102x_ethtool_ops; 720 721 mse102x_init_mac(mse, dev->of_node); 722 723 ret = register_netdev(ndev); 724 if (ret) { 725 dev_err(dev, "failed to register network device: %d\n", ret); 726 return ret; 727 } 728 729 mse102x_init_device_debugfs(mses); 730 731 return 0; 732 } 733 734 static void mse102x_remove_spi(struct spi_device *spi) 735 { 736 struct mse102x_net *mse = dev_get_drvdata(&spi->dev); 737 struct mse102x_net_spi *mses = to_mse102x_spi(mse); 738 739 if (netif_msg_drv(mse)) 740 dev_info(&spi->dev, "remove\n"); 741 742 mse102x_remove_device_debugfs(mses); 743 unregister_netdev(mse->ndev); 744 } 745 746 static const struct of_device_id mse102x_match_table[] = { 747 { .compatible = "vertexcom,mse1021" }, 748 { .compatible = "vertexcom,mse1022" }, 749 { } 750 }; 751 MODULE_DEVICE_TABLE(of, mse102x_match_table); 752 753 static struct spi_driver mse102x_driver = { 754 .driver = { 755 .name = DRV_NAME, 756 .of_match_table = mse102x_match_table, 757 .pm = &mse102x_pm_ops, 758 }, 759 .probe = mse102x_probe_spi, 760 .remove = mse102x_remove_spi, 761 }; 762 module_spi_driver(mse102x_driver); 763 764 MODULE_DESCRIPTION("MSE102x Network driver"); 765 MODULE_AUTHOR("Stefan Wahren <stefan.wahren@chargebyte.com>"); 766 MODULE_LICENSE("GPL"); 767 MODULE_ALIAS("spi:" DRV_NAME); 768