1 /* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. 2 * 3 * This program is free software; you can redistribute it and/or modify 4 * it under the terms of the GNU General Public License version 2 and 5 * only version 2 as published by the Free Software Foundation. 6 * 7 * This program is distributed in the hope that it will be useful, 8 * but WITHOUT ANY WARRANTY; without even the implied warranty of 9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 10 * GNU General Public License for more details. 11 */ 12 13 /* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver */ 14 15 #include <linux/if_ether.h> 16 #include <linux/if_vlan.h> 17 #include <linux/interrupt.h> 18 #include <linux/io.h> 19 #include <linux/module.h> 20 #include <linux/of.h> 21 #include <linux/of_net.h> 22 #include <linux/of_device.h> 23 #include <linux/phy.h> 24 #include <linux/platform_device.h> 25 #include <linux/acpi.h> 26 #include "emac.h" 27 #include "emac-mac.h" 28 #include "emac-phy.h" 29 #include "emac-sgmii.h" 30 31 #define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \ 32 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) 33 34 #define EMAC_RRD_SIZE 4 35 /* The RRD size if timestamping is enabled: */ 36 #define EMAC_TS_RRD_SIZE 6 37 #define EMAC_TPD_SIZE 4 38 #define EMAC_RFD_SIZE 2 39 40 #define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0 41 #define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22 42 #define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0 43 #define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24 44 45 #define RXQ0_NUM_RFD_PREF_DEF 8 46 #define TXQ0_NUM_TPD_PREF_DEF 5 47 48 #define EMAC_PREAMBLE_DEF 7 49 50 #define DMAR_DLY_CNT_DEF 15 51 #define DMAW_DLY_CNT_DEF 4 52 53 #define IMR_NORMAL_MASK (ISR_ERROR | ISR_OVER | ISR_TX_PKT) 54 55 #define ISR_TX_PKT (\ 56 TX_PKT_INT |\ 57 TX_PKT_INT1 |\ 58 TX_PKT_INT2 |\ 59 TX_PKT_INT3) 60 61 #define ISR_OVER (\ 62 RFD0_UR_INT |\ 63 RFD1_UR_INT |\ 64 RFD2_UR_INT |\ 65 RFD3_UR_INT |\ 66 RFD4_UR_INT |\ 67 RXF_OF_INT |\ 68 TXF_UR_INT) 69 70 #define ISR_ERROR (\ 71 DMAR_TO_INT |\ 72 DMAW_TO_INT |\ 73 TXQ_TO_INT) 74 75 /* in sync with enum emac_clk_id */ 76 static const char * const emac_clk_name[] = { 77 "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk", 78 "rx_clk", "sys_clk" 79 }; 80 81 void emac_reg_update32(void __iomem *addr, u32 mask, u32 val) 82 { 83 u32 data = readl(addr); 84 85 writel(((data & ~mask) | val), addr); 86 } 87 88 /* reinitialize */ 89 int emac_reinit_locked(struct emac_adapter *adpt) 90 { 91 int ret; 92 93 mutex_lock(&adpt->reset_lock); 94 95 emac_mac_down(adpt); 96 emac_sgmii_reset(adpt); 97 ret = emac_mac_up(adpt); 98 99 mutex_unlock(&adpt->reset_lock); 100 101 return ret; 102 } 103 104 /* NAPI */ 105 static int emac_napi_rtx(struct napi_struct *napi, int budget) 106 { 107 struct emac_rx_queue *rx_q = 108 container_of(napi, struct emac_rx_queue, napi); 109 struct emac_adapter *adpt = netdev_priv(rx_q->netdev); 110 struct emac_irq *irq = rx_q->irq; 111 int work_done = 0; 112 113 emac_mac_rx_process(adpt, rx_q, &work_done, budget); 114 115 if (work_done < budget) { 116 napi_complete_done(napi, work_done); 117 118 irq->mask |= rx_q->intr; 119 writel(irq->mask, adpt->base + EMAC_INT_MASK); 120 } 121 122 return work_done; 123 } 124 125 /* Transmit the packet */ 126 static int emac_start_xmit(struct sk_buff *skb, struct net_device *netdev) 127 { 128 struct emac_adapter *adpt = netdev_priv(netdev); 129 130 return emac_mac_tx_buf_send(adpt, &adpt->tx_q, skb); 131 } 132 133 static irqreturn_t emac_isr(int _irq, void *data) 134 { 135 struct emac_irq *irq = data; 136 struct emac_adapter *adpt = 137 container_of(irq, struct emac_adapter, irq); 138 struct emac_rx_queue *rx_q = &adpt->rx_q; 139 u32 isr, status; 140 141 /* disable the interrupt */ 142 writel(0, adpt->base + EMAC_INT_MASK); 143 144 isr = readl_relaxed(adpt->base + EMAC_INT_STATUS); 145 146 status = isr & irq->mask; 147 if (status == 0) 148 goto exit; 149 150 if (status & ISR_ERROR) { 151 net_err_ratelimited("%s: error interrupt 0x%lx\n", 152 adpt->netdev->name, status & ISR_ERROR); 153 /* reset MAC */ 154 schedule_work(&adpt->work_thread); 155 } 156 157 /* Schedule the napi for receive queue with interrupt 158 * status bit set 159 */ 160 if (status & rx_q->intr) { 161 if (napi_schedule_prep(&rx_q->napi)) { 162 irq->mask &= ~rx_q->intr; 163 __napi_schedule(&rx_q->napi); 164 } 165 } 166 167 if (status & TX_PKT_INT) 168 emac_mac_tx_process(adpt, &adpt->tx_q); 169 170 if (status & ISR_OVER) 171 net_warn_ratelimited("%s: TX/RX overflow interrupt\n", 172 adpt->netdev->name); 173 174 exit: 175 /* enable the interrupt */ 176 writel(irq->mask, adpt->base + EMAC_INT_MASK); 177 178 return IRQ_HANDLED; 179 } 180 181 /* Configure VLAN tag strip/insert feature */ 182 static int emac_set_features(struct net_device *netdev, 183 netdev_features_t features) 184 { 185 netdev_features_t changed = features ^ netdev->features; 186 struct emac_adapter *adpt = netdev_priv(netdev); 187 188 /* We only need to reprogram the hardware if the VLAN tag features 189 * have changed, and if it's already running. 190 */ 191 if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX))) 192 return 0; 193 194 if (!netif_running(netdev)) 195 return 0; 196 197 /* emac_mac_mode_config() uses netdev->features to configure the EMAC, 198 * so make sure it's set first. 199 */ 200 netdev->features = features; 201 202 return emac_reinit_locked(adpt); 203 } 204 205 /* Configure Multicast and Promiscuous modes */ 206 static void emac_rx_mode_set(struct net_device *netdev) 207 { 208 struct emac_adapter *adpt = netdev_priv(netdev); 209 struct netdev_hw_addr *ha; 210 211 emac_mac_mode_config(adpt); 212 213 /* update multicast address filtering */ 214 emac_mac_multicast_addr_clear(adpt); 215 netdev_for_each_mc_addr(ha, netdev) 216 emac_mac_multicast_addr_set(adpt, ha->addr); 217 } 218 219 /* Change the Maximum Transfer Unit (MTU) */ 220 static int emac_change_mtu(struct net_device *netdev, int new_mtu) 221 { 222 struct emac_adapter *adpt = netdev_priv(netdev); 223 224 netif_info(adpt, hw, adpt->netdev, 225 "changing MTU from %d to %d\n", netdev->mtu, 226 new_mtu); 227 netdev->mtu = new_mtu; 228 229 if (netif_running(netdev)) 230 return emac_reinit_locked(adpt); 231 232 return 0; 233 } 234 235 /* Called when the network interface is made active */ 236 static int emac_open(struct net_device *netdev) 237 { 238 struct emac_adapter *adpt = netdev_priv(netdev); 239 struct emac_irq *irq = &adpt->irq; 240 int ret; 241 242 ret = request_irq(irq->irq, emac_isr, 0, "emac-core0", irq); 243 if (ret) { 244 netdev_err(adpt->netdev, "could not request emac-core0 irq\n"); 245 return ret; 246 } 247 248 /* allocate rx/tx dma buffer & descriptors */ 249 ret = emac_mac_rx_tx_rings_alloc_all(adpt); 250 if (ret) { 251 netdev_err(adpt->netdev, "error allocating rx/tx rings\n"); 252 free_irq(irq->irq, irq); 253 return ret; 254 } 255 256 ret = emac_sgmii_open(adpt); 257 if (ret) { 258 emac_mac_rx_tx_rings_free_all(adpt); 259 free_irq(irq->irq, irq); 260 return ret; 261 } 262 263 ret = emac_mac_up(adpt); 264 if (ret) { 265 emac_mac_rx_tx_rings_free_all(adpt); 266 free_irq(irq->irq, irq); 267 emac_sgmii_close(adpt); 268 return ret; 269 } 270 271 return 0; 272 } 273 274 /* Called when the network interface is disabled */ 275 static int emac_close(struct net_device *netdev) 276 { 277 struct emac_adapter *adpt = netdev_priv(netdev); 278 279 mutex_lock(&adpt->reset_lock); 280 281 emac_sgmii_close(adpt); 282 emac_mac_down(adpt); 283 emac_mac_rx_tx_rings_free_all(adpt); 284 285 free_irq(adpt->irq.irq, &adpt->irq); 286 287 mutex_unlock(&adpt->reset_lock); 288 289 return 0; 290 } 291 292 /* Respond to a TX hang */ 293 static void emac_tx_timeout(struct net_device *netdev) 294 { 295 struct emac_adapter *adpt = netdev_priv(netdev); 296 297 schedule_work(&adpt->work_thread); 298 } 299 300 /* IOCTL support for the interface */ 301 static int emac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) 302 { 303 if (!netif_running(netdev)) 304 return -EINVAL; 305 306 if (!netdev->phydev) 307 return -ENODEV; 308 309 return phy_mii_ioctl(netdev->phydev, ifr, cmd); 310 } 311 312 /** 313 * emac_update_hw_stats - read the EMAC stat registers 314 * 315 * Reads the stats registers and write the values to adpt->stats. 316 * 317 * adpt->stats.lock must be held while calling this function, 318 * and while reading from adpt->stats. 319 */ 320 void emac_update_hw_stats(struct emac_adapter *adpt) 321 { 322 struct emac_stats *stats = &adpt->stats; 323 u64 *stats_itr = &adpt->stats.rx_ok; 324 void __iomem *base = adpt->base; 325 unsigned int addr; 326 327 addr = REG_MAC_RX_STATUS_BIN; 328 while (addr <= REG_MAC_RX_STATUS_END) { 329 *stats_itr += readl_relaxed(base + addr); 330 stats_itr++; 331 addr += sizeof(u32); 332 } 333 334 /* additional rx status */ 335 stats->rx_crc_align += readl_relaxed(base + EMAC_RXMAC_STATC_REG23); 336 stats->rx_jabbers += readl_relaxed(base + EMAC_RXMAC_STATC_REG24); 337 338 /* update tx status */ 339 addr = REG_MAC_TX_STATUS_BIN; 340 stats_itr = &stats->tx_ok; 341 342 while (addr <= REG_MAC_TX_STATUS_END) { 343 *stats_itr += readl_relaxed(base + addr); 344 stats_itr++; 345 addr += sizeof(u32); 346 } 347 348 /* additional tx status */ 349 stats->tx_col += readl_relaxed(base + EMAC_TXMAC_STATC_REG25); 350 } 351 352 /* Provide network statistics info for the interface */ 353 static void emac_get_stats64(struct net_device *netdev, 354 struct rtnl_link_stats64 *net_stats) 355 { 356 struct emac_adapter *adpt = netdev_priv(netdev); 357 struct emac_stats *stats = &adpt->stats; 358 359 spin_lock(&stats->lock); 360 361 emac_update_hw_stats(adpt); 362 363 /* return parsed statistics */ 364 net_stats->rx_packets = stats->rx_ok; 365 net_stats->tx_packets = stats->tx_ok; 366 net_stats->rx_bytes = stats->rx_byte_cnt; 367 net_stats->tx_bytes = stats->tx_byte_cnt; 368 net_stats->multicast = stats->rx_mcast; 369 net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 + 370 stats->tx_late_col + stats->tx_abort_col; 371 372 net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err + 373 stats->rx_len_err + stats->rx_sz_ov + 374 stats->rx_align_err; 375 net_stats->rx_fifo_errors = stats->rx_rxf_ov; 376 net_stats->rx_length_errors = stats->rx_len_err; 377 net_stats->rx_crc_errors = stats->rx_fcs_err; 378 net_stats->rx_frame_errors = stats->rx_align_err; 379 net_stats->rx_over_errors = stats->rx_rxf_ov; 380 net_stats->rx_missed_errors = stats->rx_rxf_ov; 381 382 net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col + 383 stats->tx_underrun + stats->tx_trunc; 384 net_stats->tx_fifo_errors = stats->tx_underrun; 385 net_stats->tx_aborted_errors = stats->tx_abort_col; 386 net_stats->tx_window_errors = stats->tx_late_col; 387 388 spin_unlock(&stats->lock); 389 } 390 391 static const struct net_device_ops emac_netdev_ops = { 392 .ndo_open = emac_open, 393 .ndo_stop = emac_close, 394 .ndo_validate_addr = eth_validate_addr, 395 .ndo_start_xmit = emac_start_xmit, 396 .ndo_set_mac_address = eth_mac_addr, 397 .ndo_change_mtu = emac_change_mtu, 398 .ndo_do_ioctl = emac_ioctl, 399 .ndo_tx_timeout = emac_tx_timeout, 400 .ndo_get_stats64 = emac_get_stats64, 401 .ndo_set_features = emac_set_features, 402 .ndo_set_rx_mode = emac_rx_mode_set, 403 }; 404 405 /* Watchdog task routine, called to reinitialize the EMAC */ 406 static void emac_work_thread(struct work_struct *work) 407 { 408 struct emac_adapter *adpt = 409 container_of(work, struct emac_adapter, work_thread); 410 411 emac_reinit_locked(adpt); 412 } 413 414 /* Initialize various data structures */ 415 static void emac_init_adapter(struct emac_adapter *adpt) 416 { 417 u32 reg; 418 419 adpt->rrd_size = EMAC_RRD_SIZE; 420 adpt->tpd_size = EMAC_TPD_SIZE; 421 adpt->rfd_size = EMAC_RFD_SIZE; 422 423 /* descriptors */ 424 adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS; 425 adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS; 426 427 /* dma */ 428 adpt->dma_order = emac_dma_ord_out; 429 adpt->dmar_block = emac_dma_req_4096; 430 adpt->dmaw_block = emac_dma_req_128; 431 adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF; 432 adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF; 433 adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF; 434 adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF; 435 436 /* irq moderator */ 437 reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) | 438 ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT); 439 adpt->irq_mod = reg; 440 441 /* others */ 442 adpt->preamble = EMAC_PREAMBLE_DEF; 443 444 /* default to automatic flow control */ 445 adpt->automatic = true; 446 447 /* Disable single-pause-frame mode by default */ 448 adpt->single_pause_mode = false; 449 } 450 451 /* Get the clock */ 452 static int emac_clks_get(struct platform_device *pdev, 453 struct emac_adapter *adpt) 454 { 455 unsigned int i; 456 457 for (i = 0; i < EMAC_CLK_CNT; i++) { 458 struct clk *clk = devm_clk_get(&pdev->dev, emac_clk_name[i]); 459 460 if (IS_ERR(clk)) { 461 dev_err(&pdev->dev, 462 "could not claim clock %s (error=%li)\n", 463 emac_clk_name[i], PTR_ERR(clk)); 464 465 return PTR_ERR(clk); 466 } 467 468 adpt->clk[i] = clk; 469 } 470 471 return 0; 472 } 473 474 /* Initialize clocks */ 475 static int emac_clks_phase1_init(struct platform_device *pdev, 476 struct emac_adapter *adpt) 477 { 478 int ret; 479 480 /* On ACPI platforms, clocks are controlled by firmware and/or 481 * ACPI, not by drivers. 482 */ 483 if (has_acpi_companion(&pdev->dev)) 484 return 0; 485 486 ret = emac_clks_get(pdev, adpt); 487 if (ret) 488 return ret; 489 490 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]); 491 if (ret) 492 return ret; 493 494 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]); 495 if (ret) 496 return ret; 497 498 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000); 499 if (ret) 500 return ret; 501 502 return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]); 503 } 504 505 /* Enable clocks; needs emac_clks_phase1_init to be called before */ 506 static int emac_clks_phase2_init(struct platform_device *pdev, 507 struct emac_adapter *adpt) 508 { 509 int ret; 510 511 if (has_acpi_companion(&pdev->dev)) 512 return 0; 513 514 ret = clk_set_rate(adpt->clk[EMAC_CLK_TX], 125000000); 515 if (ret) 516 return ret; 517 518 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]); 519 if (ret) 520 return ret; 521 522 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 125000000); 523 if (ret) 524 return ret; 525 526 ret = clk_set_rate(adpt->clk[EMAC_CLK_MDIO], 25000000); 527 if (ret) 528 return ret; 529 530 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]); 531 if (ret) 532 return ret; 533 534 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]); 535 if (ret) 536 return ret; 537 538 return clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]); 539 } 540 541 static void emac_clks_teardown(struct emac_adapter *adpt) 542 { 543 544 unsigned int i; 545 546 for (i = 0; i < EMAC_CLK_CNT; i++) 547 clk_disable_unprepare(adpt->clk[i]); 548 } 549 550 /* Get the resources */ 551 static int emac_probe_resources(struct platform_device *pdev, 552 struct emac_adapter *adpt) 553 { 554 struct net_device *netdev = adpt->netdev; 555 struct resource *res; 556 char maddr[ETH_ALEN]; 557 int ret = 0; 558 559 /* get mac address */ 560 if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) 561 ether_addr_copy(netdev->dev_addr, maddr); 562 else 563 eth_hw_addr_random(netdev); 564 565 /* Core 0 interrupt */ 566 ret = platform_get_irq(pdev, 0); 567 if (ret < 0) { 568 dev_err(&pdev->dev, 569 "error: missing core0 irq resource (error=%i)\n", ret); 570 return ret; 571 } 572 adpt->irq.irq = ret; 573 574 /* base register address */ 575 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 576 adpt->base = devm_ioremap_resource(&pdev->dev, res); 577 if (IS_ERR(adpt->base)) 578 return PTR_ERR(adpt->base); 579 580 /* CSR register address */ 581 res = platform_get_resource(pdev, IORESOURCE_MEM, 1); 582 adpt->csr = devm_ioremap_resource(&pdev->dev, res); 583 if (IS_ERR(adpt->csr)) 584 return PTR_ERR(adpt->csr); 585 586 netdev->base_addr = (unsigned long)adpt->base; 587 588 return 0; 589 } 590 591 static const struct of_device_id emac_dt_match[] = { 592 { 593 .compatible = "qcom,fsm9900-emac", 594 }, 595 {} 596 }; 597 MODULE_DEVICE_TABLE(of, emac_dt_match); 598 599 #if IS_ENABLED(CONFIG_ACPI) 600 static const struct acpi_device_id emac_acpi_match[] = { 601 { 602 .id = "QCOM8070", 603 }, 604 {} 605 }; 606 MODULE_DEVICE_TABLE(acpi, emac_acpi_match); 607 #endif 608 609 static int emac_probe(struct platform_device *pdev) 610 { 611 struct net_device *netdev; 612 struct emac_adapter *adpt; 613 struct emac_sgmii *phy; 614 u16 devid, revid; 615 u32 reg; 616 int ret; 617 618 /* The TPD buffer address is limited to: 619 * 1. PTP: 45bits. (Driver doesn't support yet.) 620 * 2. NON-PTP: 46bits. 621 */ 622 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(46)); 623 if (ret) { 624 dev_err(&pdev->dev, "could not set DMA mask\n"); 625 return ret; 626 } 627 628 netdev = alloc_etherdev(sizeof(struct emac_adapter)); 629 if (!netdev) 630 return -ENOMEM; 631 632 dev_set_drvdata(&pdev->dev, netdev); 633 SET_NETDEV_DEV(netdev, &pdev->dev); 634 emac_set_ethtool_ops(netdev); 635 636 adpt = netdev_priv(netdev); 637 adpt->netdev = netdev; 638 adpt->msg_enable = EMAC_MSG_DEFAULT; 639 640 phy = &adpt->phy; 641 atomic_set(&phy->decode_error_count, 0); 642 643 mutex_init(&adpt->reset_lock); 644 spin_lock_init(&adpt->stats.lock); 645 646 adpt->irq.mask = RX_PKT_INT0 | IMR_NORMAL_MASK; 647 648 ret = emac_probe_resources(pdev, adpt); 649 if (ret) 650 goto err_undo_netdev; 651 652 /* initialize clocks */ 653 ret = emac_clks_phase1_init(pdev, adpt); 654 if (ret) { 655 dev_err(&pdev->dev, "could not initialize clocks\n"); 656 goto err_undo_netdev; 657 } 658 659 netdev->watchdog_timeo = EMAC_WATCHDOG_TIME; 660 netdev->irq = adpt->irq.irq; 661 662 netdev->netdev_ops = &emac_netdev_ops; 663 664 emac_init_adapter(adpt); 665 666 /* init external phy */ 667 ret = emac_phy_config(pdev, adpt); 668 if (ret) 669 goto err_undo_clocks; 670 671 /* init internal sgmii phy */ 672 ret = emac_sgmii_config(pdev, adpt); 673 if (ret) 674 goto err_undo_mdiobus; 675 676 /* enable clocks */ 677 ret = emac_clks_phase2_init(pdev, adpt); 678 if (ret) { 679 dev_err(&pdev->dev, "could not initialize clocks\n"); 680 goto err_undo_mdiobus; 681 } 682 683 /* set hw features */ 684 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | 685 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX | 686 NETIF_F_HW_VLAN_CTAG_TX; 687 netdev->hw_features = netdev->features; 688 689 netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM | 690 NETIF_F_TSO | NETIF_F_TSO6; 691 692 /* MTU range: 46 - 9194 */ 693 netdev->min_mtu = EMAC_MIN_ETH_FRAME_SIZE - 694 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 695 netdev->max_mtu = EMAC_MAX_ETH_FRAME_SIZE - 696 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 697 698 INIT_WORK(&adpt->work_thread, emac_work_thread); 699 700 /* Initialize queues */ 701 emac_mac_rx_tx_ring_init_all(pdev, adpt); 702 703 netif_napi_add(netdev, &adpt->rx_q.napi, emac_napi_rtx, 704 NAPI_POLL_WEIGHT); 705 706 ret = register_netdev(netdev); 707 if (ret) { 708 dev_err(&pdev->dev, "could not register net device\n"); 709 goto err_undo_napi; 710 } 711 712 reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL); 713 devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT; 714 revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT; 715 reg = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION); 716 717 netif_info(adpt, probe, netdev, 718 "hardware id %d.%d, hardware version %d.%d.%d\n", 719 devid, revid, 720 (reg & MAJOR_BMSK) >> MAJOR_SHFT, 721 (reg & MINOR_BMSK) >> MINOR_SHFT, 722 (reg & STEP_BMSK) >> STEP_SHFT); 723 724 return 0; 725 726 err_undo_napi: 727 netif_napi_del(&adpt->rx_q.napi); 728 err_undo_mdiobus: 729 put_device(&adpt->phydev->mdio.dev); 730 mdiobus_unregister(adpt->mii_bus); 731 err_undo_clocks: 732 emac_clks_teardown(adpt); 733 err_undo_netdev: 734 free_netdev(netdev); 735 736 return ret; 737 } 738 739 static int emac_remove(struct platform_device *pdev) 740 { 741 struct net_device *netdev = dev_get_drvdata(&pdev->dev); 742 struct emac_adapter *adpt = netdev_priv(netdev); 743 744 unregister_netdev(netdev); 745 netif_napi_del(&adpt->rx_q.napi); 746 747 emac_clks_teardown(adpt); 748 749 put_device(&adpt->phydev->mdio.dev); 750 mdiobus_unregister(adpt->mii_bus); 751 free_netdev(netdev); 752 753 if (adpt->phy.digital) 754 iounmap(adpt->phy.digital); 755 iounmap(adpt->phy.base); 756 757 return 0; 758 } 759 760 static void emac_shutdown(struct platform_device *pdev) 761 { 762 struct net_device *netdev = dev_get_drvdata(&pdev->dev); 763 struct emac_adapter *adpt = netdev_priv(netdev); 764 765 if (netdev->flags & IFF_UP) { 766 /* Closing the SGMII turns off its interrupts */ 767 emac_sgmii_close(adpt); 768 769 /* Resetting the MAC turns off all DMA and its interrupts */ 770 emac_mac_reset(adpt); 771 } 772 } 773 774 static struct platform_driver emac_platform_driver = { 775 .probe = emac_probe, 776 .remove = emac_remove, 777 .driver = { 778 .name = "qcom-emac", 779 .of_match_table = emac_dt_match, 780 .acpi_match_table = ACPI_PTR(emac_acpi_match), 781 }, 782 .shutdown = emac_shutdown, 783 }; 784 785 module_platform_driver(emac_platform_driver); 786 787 MODULE_LICENSE("GPL v2"); 788 MODULE_ALIAS("platform:qcom-emac"); 789