1// SPDX-License-Identifier: GPL-2.0-only 2/* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. 3 */ 4 5/* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver */ 6 7#include <linux/if_ether.h> 8#include <linux/if_vlan.h> 9#include <linux/interrupt.h> 10#include <linux/io.h> 11#include <linux/module.h> 12#include <linux/of.h> 13#include <linux/of_net.h> 14#include <linux/of_device.h> 15#include <linux/phy.h> 16#include <linux/platform_device.h> 17#include <linux/acpi.h> 18#include "emac.h" 19#include "emac-mac.h" 20#include "emac-phy.h" 21#include "emac-sgmii.h" 22 23#define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \ 24 NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) 25 26#define EMAC_RRD_SIZE 4 27/* The RRD size if timestamping is enabled: */ 28#define EMAC_TS_RRD_SIZE 6 29#define EMAC_TPD_SIZE 4 30#define EMAC_RFD_SIZE 2 31 32#define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0 33#define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22 34#define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0 35#define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24 36 37#define RXQ0_NUM_RFD_PREF_DEF 8 38#define TXQ0_NUM_TPD_PREF_DEF 5 39 40#define EMAC_PREAMBLE_DEF 7 41 42#define DMAR_DLY_CNT_DEF 15 43#define DMAW_DLY_CNT_DEF 4 44 45#define IMR_NORMAL_MASK (ISR_ERROR | ISR_OVER | ISR_TX_PKT) 46 47#define ISR_TX_PKT (\ 48 TX_PKT_INT |\ 49 TX_PKT_INT1 |\ 50 TX_PKT_INT2 |\ 51 TX_PKT_INT3) 52 53#define ISR_OVER (\ 54 RFD0_UR_INT |\ 55 RFD1_UR_INT |\ 56 RFD2_UR_INT |\ 57 RFD3_UR_INT |\ 58 RFD4_UR_INT |\ 59 RXF_OF_INT |\ 60 TXF_UR_INT) 61 62#define ISR_ERROR (\ 63 DMAR_TO_INT |\ 64 DMAW_TO_INT |\ 65 TXQ_TO_INT) 66 67/* in sync with enum emac_clk_id */ 68static const char * const emac_clk_name[] = { 69 "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk", 70 "rx_clk", "sys_clk" 71}; 72 73void emac_reg_update32(void __iomem *addr, u32 mask, u32 val) 74{ 75 u32 data = readl(addr); 76 77 writel(((data & ~mask) | val), addr); 78} 79 80/* reinitialize */ 81int emac_reinit_locked(struct emac_adapter *adpt) 82{ 83 int ret; 84 85 mutex_lock(&adpt->reset_lock); 86 87 emac_mac_down(adpt); 88 emac_sgmii_reset(adpt); 89 ret = emac_mac_up(adpt); 90 91 mutex_unlock(&adpt->reset_lock); 92 93 return ret; 94} 95 96/* NAPI */ 97static int emac_napi_rtx(struct napi_struct *napi, int budget) 98{ 99 struct emac_rx_queue *rx_q = 100 container_of(napi, struct emac_rx_queue, napi); 101 struct emac_adapter *adpt = netdev_priv(rx_q->netdev); 102 struct emac_irq *irq = rx_q->irq; 103 int work_done = 0; 104 105 emac_mac_rx_process(adpt, rx_q, &work_done, budget); 106 107 if (work_done < budget) { 108 napi_complete_done(napi, work_done); 109 110 irq->mask |= rx_q->intr; 111 writel(irq->mask, adpt->base + EMAC_INT_MASK); 112 } 113 114 return work_done; 115} 116 117/* Transmit the packet */ 118static netdev_tx_t emac_start_xmit(struct sk_buff *skb, 119 struct net_device *netdev) 120{ 121 struct emac_adapter *adpt = netdev_priv(netdev); 122 123 return emac_mac_tx_buf_send(adpt, &adpt->tx_q, skb); 124} 125 126static irqreturn_t emac_isr(int _irq, void *data) 127{ 128 struct emac_irq *irq = data; 129 struct emac_adapter *adpt = 130 container_of(irq, struct emac_adapter, irq); 131 struct emac_rx_queue *rx_q = &adpt->rx_q; 132 u32 isr, status; 133 134 /* disable the interrupt */ 135 writel(0, adpt->base + EMAC_INT_MASK); 136 137 isr = readl_relaxed(adpt->base + EMAC_INT_STATUS); 138 139 status = isr & irq->mask; 140 if (status == 0) 141 goto exit; 142 143 if (status & ISR_ERROR) { 144 net_err_ratelimited("%s: error interrupt 0x%lx\n", 145 adpt->netdev->name, status & ISR_ERROR); 146 /* reset MAC */ 147 schedule_work(&adpt->work_thread); 148 } 149 150 /* Schedule the napi for receive queue with interrupt 151 * status bit set 152 */ 153 if (status & rx_q->intr) { 154 if (napi_schedule_prep(&rx_q->napi)) { 155 irq->mask &= ~rx_q->intr; 156 __napi_schedule(&rx_q->napi); 157 } 158 } 159 160 if (status & TX_PKT_INT) 161 emac_mac_tx_process(adpt, &adpt->tx_q); 162 163 if (status & ISR_OVER) 164 net_warn_ratelimited("%s: TX/RX overflow interrupt\n", 165 adpt->netdev->name); 166 167exit: 168 /* enable the interrupt */ 169 writel(irq->mask, adpt->base + EMAC_INT_MASK); 170 171 return IRQ_HANDLED; 172} 173 174/* Configure VLAN tag strip/insert feature */ 175static int emac_set_features(struct net_device *netdev, 176 netdev_features_t features) 177{ 178 netdev_features_t changed = features ^ netdev->features; 179 struct emac_adapter *adpt = netdev_priv(netdev); 180 181 /* We only need to reprogram the hardware if the VLAN tag features 182 * have changed, and if it's already running. 183 */ 184 if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX))) 185 return 0; 186 187 if (!netif_running(netdev)) 188 return 0; 189 190 /* emac_mac_mode_config() uses netdev->features to configure the EMAC, 191 * so make sure it's set first. 192 */ 193 netdev->features = features; 194 195 return emac_reinit_locked(adpt); 196} 197 198/* Configure Multicast and Promiscuous modes */ 199static void emac_rx_mode_set(struct net_device *netdev) 200{ 201 struct emac_adapter *adpt = netdev_priv(netdev); 202 struct netdev_hw_addr *ha; 203 204 emac_mac_mode_config(adpt); 205 206 /* update multicast address filtering */ 207 emac_mac_multicast_addr_clear(adpt); 208 netdev_for_each_mc_addr(ha, netdev) 209 emac_mac_multicast_addr_set(adpt, ha->addr); 210} 211 212/* Change the Maximum Transfer Unit (MTU) */ 213static int emac_change_mtu(struct net_device *netdev, int new_mtu) 214{ 215 struct emac_adapter *adpt = netdev_priv(netdev); 216 217 netif_dbg(adpt, hw, adpt->netdev, 218 "changing MTU from %d to %d\n", netdev->mtu, 219 new_mtu); 220 netdev->mtu = new_mtu; 221 222 if (netif_running(netdev)) 223 return emac_reinit_locked(adpt); 224 225 return 0; 226} 227 228/* Called when the network interface is made active */ 229static int emac_open(struct net_device *netdev) 230{ 231 struct emac_adapter *adpt = netdev_priv(netdev); 232 struct emac_irq *irq = &adpt->irq; 233 int ret; 234 235 ret = request_irq(irq->irq, emac_isr, 0, "emac-core0", irq); 236 if (ret) { 237 netdev_err(adpt->netdev, "could not request emac-core0 irq\n"); 238 return ret; 239 } 240 241 /* allocate rx/tx dma buffer & descriptors */ 242 ret = emac_mac_rx_tx_rings_alloc_all(adpt); 243 if (ret) { 244 netdev_err(adpt->netdev, "error allocating rx/tx rings\n"); 245 free_irq(irq->irq, irq); 246 return ret; 247 } 248 249 ret = emac_sgmii_open(adpt); 250 if (ret) { 251 emac_mac_rx_tx_rings_free_all(adpt); 252 free_irq(irq->irq, irq); 253 return ret; 254 } 255 256 ret = emac_mac_up(adpt); 257 if (ret) { 258 emac_mac_rx_tx_rings_free_all(adpt); 259 free_irq(irq->irq, irq); 260 emac_sgmii_close(adpt); 261 return ret; 262 } 263 264 return 0; 265} 266 267/* Called when the network interface is disabled */ 268static int emac_close(struct net_device *netdev) 269{ 270 struct emac_adapter *adpt = netdev_priv(netdev); 271 272 mutex_lock(&adpt->reset_lock); 273 274 emac_sgmii_close(adpt); 275 emac_mac_down(adpt); 276 emac_mac_rx_tx_rings_free_all(adpt); 277 278 free_irq(adpt->irq.irq, &adpt->irq); 279 280 mutex_unlock(&adpt->reset_lock); 281 282 return 0; 283} 284 285/* Respond to a TX hang */ 286static void emac_tx_timeout(struct net_device *netdev, unsigned int txqueue) 287{ 288 struct emac_adapter *adpt = netdev_priv(netdev); 289 290 schedule_work(&adpt->work_thread); 291} 292 293/** 294 * emac_update_hw_stats - read the EMAC stat registers 295 * @adpt: pointer to adapter struct 296 * 297 * Reads the stats registers and write the values to adpt->stats. 298 * 299 * adpt->stats.lock must be held while calling this function, 300 * and while reading from adpt->stats. 301 */ 302void emac_update_hw_stats(struct emac_adapter *adpt) 303{ 304 struct emac_stats *stats = &adpt->stats; 305 u64 *stats_itr = &adpt->stats.rx_ok; 306 void __iomem *base = adpt->base; 307 unsigned int addr; 308 309 addr = REG_MAC_RX_STATUS_BIN; 310 while (addr <= REG_MAC_RX_STATUS_END) { 311 *stats_itr += readl_relaxed(base + addr); 312 stats_itr++; 313 addr += sizeof(u32); 314 } 315 316 /* additional rx status */ 317 stats->rx_crc_align += readl_relaxed(base + EMAC_RXMAC_STATC_REG23); 318 stats->rx_jabbers += readl_relaxed(base + EMAC_RXMAC_STATC_REG24); 319 320 /* update tx status */ 321 addr = REG_MAC_TX_STATUS_BIN; 322 stats_itr = &stats->tx_ok; 323 324 while (addr <= REG_MAC_TX_STATUS_END) { 325 *stats_itr += readl_relaxed(base + addr); 326 stats_itr++; 327 addr += sizeof(u32); 328 } 329 330 /* additional tx status */ 331 stats->tx_col += readl_relaxed(base + EMAC_TXMAC_STATC_REG25); 332} 333 334/* Provide network statistics info for the interface */ 335static void emac_get_stats64(struct net_device *netdev, 336 struct rtnl_link_stats64 *net_stats) 337{ 338 struct emac_adapter *adpt = netdev_priv(netdev); 339 struct emac_stats *stats = &adpt->stats; 340 341 spin_lock(&stats->lock); 342 343 emac_update_hw_stats(adpt); 344 345 /* return parsed statistics */ 346 net_stats->rx_packets = stats->rx_ok; 347 net_stats->tx_packets = stats->tx_ok; 348 net_stats->rx_bytes = stats->rx_byte_cnt; 349 net_stats->tx_bytes = stats->tx_byte_cnt; 350 net_stats->multicast = stats->rx_mcast; 351 net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 + 352 stats->tx_late_col + stats->tx_abort_col; 353 354 net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err + 355 stats->rx_len_err + stats->rx_sz_ov + 356 stats->rx_align_err; 357 net_stats->rx_fifo_errors = stats->rx_rxf_ov; 358 net_stats->rx_length_errors = stats->rx_len_err; 359 net_stats->rx_crc_errors = stats->rx_fcs_err; 360 net_stats->rx_frame_errors = stats->rx_align_err; 361 net_stats->rx_over_errors = stats->rx_rxf_ov; 362 net_stats->rx_missed_errors = stats->rx_rxf_ov; 363 364 net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col + 365 stats->tx_underrun + stats->tx_trunc; 366 net_stats->tx_fifo_errors = stats->tx_underrun; 367 net_stats->tx_aborted_errors = stats->tx_abort_col; 368 net_stats->tx_window_errors = stats->tx_late_col; 369 370 spin_unlock(&stats->lock); 371} 372 373static const struct net_device_ops emac_netdev_ops = { 374 .ndo_open = emac_open, 375 .ndo_stop = emac_close, 376 .ndo_validate_addr = eth_validate_addr, 377 .ndo_start_xmit = emac_start_xmit, 378 .ndo_set_mac_address = eth_mac_addr, 379 .ndo_change_mtu = emac_change_mtu, 380 .ndo_do_ioctl = phy_do_ioctl_running, 381 .ndo_tx_timeout = emac_tx_timeout, 382 .ndo_get_stats64 = emac_get_stats64, 383 .ndo_set_features = emac_set_features, 384 .ndo_set_rx_mode = emac_rx_mode_set, 385}; 386 387/* Watchdog task routine, called to reinitialize the EMAC */ 388static void emac_work_thread(struct work_struct *work) 389{ 390 struct emac_adapter *adpt = 391 container_of(work, struct emac_adapter, work_thread); 392 393 emac_reinit_locked(adpt); 394} 395 396/* Initialize various data structures */ 397static void emac_init_adapter(struct emac_adapter *adpt) 398{ 399 u32 reg; 400 401 adpt->rrd_size = EMAC_RRD_SIZE; 402 adpt->tpd_size = EMAC_TPD_SIZE; 403 adpt->rfd_size = EMAC_RFD_SIZE; 404 405 /* descriptors */ 406 adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS; 407 adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS; 408 409 /* dma */ 410 adpt->dma_order = emac_dma_ord_out; 411 adpt->dmar_block = emac_dma_req_4096; 412 adpt->dmaw_block = emac_dma_req_128; 413 adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF; 414 adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF; 415 adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF; 416 adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF; 417 418 /* irq moderator */ 419 reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) | 420 ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT); 421 adpt->irq_mod = reg; 422 423 /* others */ 424 adpt->preamble = EMAC_PREAMBLE_DEF; 425 426 /* default to automatic flow control */ 427 adpt->automatic = true; 428 429 /* Disable single-pause-frame mode by default */ 430 adpt->single_pause_mode = false; 431} 432 433/* Get the clock */ 434static int emac_clks_get(struct platform_device *pdev, 435 struct emac_adapter *adpt) 436{ 437 unsigned int i; 438 439 for (i = 0; i < EMAC_CLK_CNT; i++) { 440 struct clk *clk = devm_clk_get(&pdev->dev, emac_clk_name[i]); 441 442 if (IS_ERR(clk)) { 443 dev_err(&pdev->dev, 444 "could not claim clock %s (error=%li)\n", 445 emac_clk_name[i], PTR_ERR(clk)); 446 447 return PTR_ERR(clk); 448 } 449 450 adpt->clk[i] = clk; 451 } 452 453 return 0; 454} 455 456/* Initialize clocks */ 457static int emac_clks_phase1_init(struct platform_device *pdev, 458 struct emac_adapter *adpt) 459{ 460 int ret; 461 462 /* On ACPI platforms, clocks are controlled by firmware and/or 463 * ACPI, not by drivers. 464 */ 465 if (has_acpi_companion(&pdev->dev)) 466 return 0; 467 468 ret = emac_clks_get(pdev, adpt); 469 if (ret) 470 return ret; 471 472 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]); 473 if (ret) 474 return ret; 475 476 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]); 477 if (ret) 478 goto disable_clk_axi; 479 480 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000); 481 if (ret) 482 goto disable_clk_cfg_ahb; 483 484 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]); 485 if (ret) 486 goto disable_clk_cfg_ahb; 487 488 return 0; 489 490disable_clk_cfg_ahb: 491 clk_disable_unprepare(adpt->clk[EMAC_CLK_CFG_AHB]); 492disable_clk_axi: 493 clk_disable_unprepare(adpt->clk[EMAC_CLK_AXI]); 494 495 return ret; 496} 497 498/* Enable clocks; needs emac_clks_phase1_init to be called before */ 499static int emac_clks_phase2_init(struct platform_device *pdev, 500 struct emac_adapter *adpt) 501{ 502 int ret; 503 504 if (has_acpi_companion(&pdev->dev)) 505 return 0; 506 507 ret = clk_set_rate(adpt->clk[EMAC_CLK_TX], 125000000); 508 if (ret) 509 return ret; 510 511 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]); 512 if (ret) 513 return ret; 514 515 ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 125000000); 516 if (ret) 517 return ret; 518 519 ret = clk_set_rate(adpt->clk[EMAC_CLK_MDIO], 25000000); 520 if (ret) 521 return ret; 522 523 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]); 524 if (ret) 525 return ret; 526 527 ret = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]); 528 if (ret) 529 return ret; 530 531 return clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]); 532} 533 534static void emac_clks_teardown(struct emac_adapter *adpt) 535{ 536 537 unsigned int i; 538 539 for (i = 0; i < EMAC_CLK_CNT; i++) 540 clk_disable_unprepare(adpt->clk[i]); 541} 542 543/* Get the resources */ 544static int emac_probe_resources(struct platform_device *pdev, 545 struct emac_adapter *adpt) 546{ 547 struct net_device *netdev = adpt->netdev; 548 char maddr[ETH_ALEN]; 549 int ret = 0; 550 551 /* get mac address */ 552 if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) 553 ether_addr_copy(netdev->dev_addr, maddr); 554 else 555 eth_hw_addr_random(netdev); 556 557 /* Core 0 interrupt */ 558 ret = platform_get_irq(pdev, 0); 559 if (ret < 0) 560 return ret; 561 adpt->irq.irq = ret; 562 563 /* base register address */ 564 adpt->base = devm_platform_ioremap_resource(pdev, 0); 565 if (IS_ERR(adpt->base)) 566 return PTR_ERR(adpt->base); 567 568 /* CSR register address */ 569 adpt->csr = devm_platform_ioremap_resource(pdev, 1); 570 if (IS_ERR(adpt->csr)) 571 return PTR_ERR(adpt->csr); 572 573 netdev->base_addr = (unsigned long)adpt->base; 574 575 return 0; 576} 577 578static const struct of_device_id emac_dt_match[] = { 579 { 580 .compatible = "qcom,fsm9900-emac", 581 }, 582 {} 583}; 584MODULE_DEVICE_TABLE(of, emac_dt_match); 585 586#if IS_ENABLED(CONFIG_ACPI) 587static const struct acpi_device_id emac_acpi_match[] = { 588 { 589 .id = "QCOM8070", 590 }, 591 {} 592}; 593MODULE_DEVICE_TABLE(acpi, emac_acpi_match); 594#endif 595 596static int emac_probe(struct platform_device *pdev) 597{ 598 struct net_device *netdev; 599 struct emac_adapter *adpt; 600 struct emac_sgmii *phy; 601 u16 devid, revid; 602 u32 reg; 603 int ret; 604 605 /* The TPD buffer address is limited to: 606 * 1. PTP: 45bits. (Driver doesn't support yet.) 607 * 2. NON-PTP: 46bits. 608 */ 609 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(46)); 610 if (ret) { 611 dev_err(&pdev->dev, "could not set DMA mask\n"); 612 return ret; 613 } 614 615 netdev = alloc_etherdev(sizeof(struct emac_adapter)); 616 if (!netdev) 617 return -ENOMEM; 618 619 dev_set_drvdata(&pdev->dev, netdev); 620 SET_NETDEV_DEV(netdev, &pdev->dev); 621 emac_set_ethtool_ops(netdev); 622 623 adpt = netdev_priv(netdev); 624 adpt->netdev = netdev; 625 adpt->msg_enable = EMAC_MSG_DEFAULT; 626 627 phy = &adpt->phy; 628 atomic_set(&phy->decode_error_count, 0); 629 630 mutex_init(&adpt->reset_lock); 631 spin_lock_init(&adpt->stats.lock); 632 633 adpt->irq.mask = RX_PKT_INT0 | IMR_NORMAL_MASK; 634 635 ret = emac_probe_resources(pdev, adpt); 636 if (ret) 637 goto err_undo_netdev; 638 639 /* initialize clocks */ 640 ret = emac_clks_phase1_init(pdev, adpt); 641 if (ret) { 642 dev_err(&pdev->dev, "could not initialize clocks\n"); 643 goto err_undo_netdev; 644 } 645 646 netdev->watchdog_timeo = EMAC_WATCHDOG_TIME; 647 netdev->irq = adpt->irq.irq; 648 649 netdev->netdev_ops = &emac_netdev_ops; 650 651 emac_init_adapter(adpt); 652 653 /* init external phy */ 654 ret = emac_phy_config(pdev, adpt); 655 if (ret) 656 goto err_undo_clocks; 657 658 /* init internal sgmii phy */ 659 ret = emac_sgmii_config(pdev, adpt); 660 if (ret) 661 goto err_undo_mdiobus; 662 663 /* enable clocks */ 664 ret = emac_clks_phase2_init(pdev, adpt); 665 if (ret) { 666 dev_err(&pdev->dev, "could not initialize clocks\n"); 667 goto err_undo_mdiobus; 668 } 669 670 /* set hw features */ 671 netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | 672 NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX | 673 NETIF_F_HW_VLAN_CTAG_TX; 674 netdev->hw_features = netdev->features; 675 676 netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM | 677 NETIF_F_TSO | NETIF_F_TSO6; 678 679 /* MTU range: 46 - 9194 */ 680 netdev->min_mtu = EMAC_MIN_ETH_FRAME_SIZE - 681 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 682 netdev->max_mtu = EMAC_MAX_ETH_FRAME_SIZE - 683 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); 684 685 INIT_WORK(&adpt->work_thread, emac_work_thread); 686 687 /* Initialize queues */ 688 emac_mac_rx_tx_ring_init_all(pdev, adpt); 689 690 netif_napi_add(netdev, &adpt->rx_q.napi, emac_napi_rtx, 691 NAPI_POLL_WEIGHT); 692 693 ret = register_netdev(netdev); 694 if (ret) { 695 dev_err(&pdev->dev, "could not register net device\n"); 696 goto err_undo_napi; 697 } 698 699 reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL); 700 devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT; 701 revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT; 702 reg = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION); 703 704 netif_info(adpt, probe, netdev, 705 "hardware id %d.%d, hardware version %d.%d.%d\n", 706 devid, revid, 707 (reg & MAJOR_BMSK) >> MAJOR_SHFT, 708 (reg & MINOR_BMSK) >> MINOR_SHFT, 709 (reg & STEP_BMSK) >> STEP_SHFT); 710 711 return 0; 712 713err_undo_napi: 714 netif_napi_del(&adpt->rx_q.napi); 715err_undo_mdiobus: 716 put_device(&adpt->phydev->mdio.dev); 717 mdiobus_unregister(adpt->mii_bus); 718err_undo_clocks: 719 emac_clks_teardown(adpt); 720err_undo_netdev: 721 free_netdev(netdev); 722 723 return ret; 724} 725 726static int emac_remove(struct platform_device *pdev) 727{ 728 struct net_device *netdev = dev_get_drvdata(&pdev->dev); 729 struct emac_adapter *adpt = netdev_priv(netdev); 730 731 netif_carrier_off(netdev); 732 netif_tx_disable(netdev); 733 734 unregister_netdev(netdev); 735 netif_napi_del(&adpt->rx_q.napi); 736 737 free_irq(adpt->irq.irq, &adpt->irq); 738 cancel_work_sync(&adpt->work_thread); 739 740 emac_clks_teardown(adpt); 741 742 put_device(&adpt->phydev->mdio.dev); 743 mdiobus_unregister(adpt->mii_bus); 744 745 if (adpt->phy.digital) 746 iounmap(adpt->phy.digital); 747 iounmap(adpt->phy.base); 748 749 free_netdev(netdev); 750 751 return 0; 752} 753 754static void emac_shutdown(struct platform_device *pdev) 755{ 756 struct net_device *netdev = dev_get_drvdata(&pdev->dev); 757 struct emac_adapter *adpt = netdev_priv(netdev); 758 759 if (netdev->flags & IFF_UP) { 760 /* Closing the SGMII turns off its interrupts */ 761 emac_sgmii_close(adpt); 762 763 /* Resetting the MAC turns off all DMA and its interrupts */ 764 emac_mac_reset(adpt); 765 } 766} 767 768static struct platform_driver emac_platform_driver = { 769 .probe = emac_probe, 770 .remove = emac_remove, 771 .driver = { 772 .name = "qcom-emac", 773 .of_match_table = emac_dt_match, 774 .acpi_match_table = ACPI_PTR(emac_acpi_match), 775 }, 776 .shutdown = emac_shutdown, 777}; 778 779module_platform_driver(emac_platform_driver); 780 781MODULE_LICENSE("GPL v2"); 782MODULE_ALIAS("platform:qcom-emac"); 783