drivers/net/ethernet/qualcomm/emac/emac.c

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

DEFINITIONS
