| /* Copyright (c) 2013-2016, The Linux Foundation. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 and |
| * only version 2 as published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| /* Qualcomm Technologies, Inc. EMAC Gigabit Ethernet Driver */ |
| |
| #include <linux/if_ether.h> |
| #include <linux/if_vlan.h> |
| #include <linux/interrupt.h> |
| #include <linux/io.h> |
| #include <linux/module.h> |
| #include <linux/of.h> |
| #include <linux/of_net.h> |
| #include <linux/of_device.h> |
| #include <linux/phy.h> |
| #include <linux/platform_device.h> |
| #include <linux/acpi.h> |
| #include "emac.h" |
| #include "emac-mac.h" |
| #include "emac-phy.h" |
| #include "emac-sgmii.h" |
| |
| #define EMAC_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK | \ |
| NETIF_MSG_TIMER | NETIF_MSG_IFDOWN | NETIF_MSG_IFUP) |
| |
| #define EMAC_RRD_SIZE 4 |
| /* The RRD size if timestamping is enabled: */ |
| #define EMAC_TS_RRD_SIZE 6 |
| #define EMAC_TPD_SIZE 4 |
| #define EMAC_RFD_SIZE 2 |
| |
| #define REG_MAC_RX_STATUS_BIN EMAC_RXMAC_STATC_REG0 |
| #define REG_MAC_RX_STATUS_END EMAC_RXMAC_STATC_REG22 |
| #define REG_MAC_TX_STATUS_BIN EMAC_TXMAC_STATC_REG0 |
| #define REG_MAC_TX_STATUS_END EMAC_TXMAC_STATC_REG24 |
| |
| #define RXQ0_NUM_RFD_PREF_DEF 8 |
| #define TXQ0_NUM_TPD_PREF_DEF 5 |
| |
| #define EMAC_PREAMBLE_DEF 7 |
| |
| #define DMAR_DLY_CNT_DEF 15 |
| #define DMAW_DLY_CNT_DEF 4 |
| |
| #define IMR_NORMAL_MASK (\ |
| ISR_ERROR |\ |
| ISR_GPHY_LINK |\ |
| ISR_TX_PKT |\ |
| GPHY_WAKEUP_INT) |
| |
| #define IMR_EXTENDED_MASK (\ |
| SW_MAN_INT |\ |
| ISR_OVER |\ |
| ISR_ERROR |\ |
| ISR_GPHY_LINK |\ |
| ISR_TX_PKT |\ |
| GPHY_WAKEUP_INT) |
| |
| #define ISR_TX_PKT (\ |
| TX_PKT_INT |\ |
| TX_PKT_INT1 |\ |
| TX_PKT_INT2 |\ |
| TX_PKT_INT3) |
| |
| #define ISR_GPHY_LINK (\ |
| GPHY_LINK_UP_INT |\ |
| GPHY_LINK_DOWN_INT) |
| |
| #define ISR_OVER (\ |
| RFD0_UR_INT |\ |
| RFD1_UR_INT |\ |
| RFD2_UR_INT |\ |
| RFD3_UR_INT |\ |
| RFD4_UR_INT |\ |
| RXF_OF_INT |\ |
| TXF_UR_INT) |
| |
| #define ISR_ERROR (\ |
| DMAR_TO_INT |\ |
| DMAW_TO_INT |\ |
| TXQ_TO_INT) |
| |
| /* in sync with enum emac_clk_id */ |
| static const char * const emac_clk_name[] = { |
| "axi_clk", "cfg_ahb_clk", "high_speed_clk", "mdio_clk", "tx_clk", |
| "rx_clk", "sys_clk" |
| }; |
| |
| void emac_reg_update32(void __iomem *addr, u32 mask, u32 val) |
| { |
| u32 data = readl(addr); |
| |
| writel(((data & ~mask) | val), addr); |
| } |
| |
| /* reinitialize */ |
| int emac_reinit_locked(struct emac_adapter *adpt) |
| { |
| int ret; |
| |
| mutex_lock(&adpt->reset_lock); |
| |
| emac_mac_down(adpt); |
| emac_sgmii_reset(adpt); |
| ret = emac_mac_up(adpt); |
| |
| mutex_unlock(&adpt->reset_lock); |
| |
| return ret; |
| } |
| |
| /* NAPI */ |
| static int emac_napi_rtx(struct napi_struct *napi, int budget) |
| { |
| struct emac_rx_queue *rx_q = |
| container_of(napi, struct emac_rx_queue, napi); |
| struct emac_adapter *adpt = netdev_priv(rx_q->netdev); |
| struct emac_irq *irq = rx_q->irq; |
| int work_done = 0; |
| |
| emac_mac_rx_process(adpt, rx_q, &work_done, budget); |
| |
| if (work_done < budget) { |
| napi_complete(napi); |
| |
| irq->mask |= rx_q->intr; |
| writel(irq->mask, adpt->base + EMAC_INT_MASK); |
| } |
| |
| return work_done; |
| } |
| |
| /* Transmit the packet */ |
| static int emac_start_xmit(struct sk_buff *skb, struct net_device *netdev) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| return emac_mac_tx_buf_send(adpt, &adpt->tx_q, skb); |
| } |
| |
| irqreturn_t emac_isr(int _irq, void *data) |
| { |
| struct emac_irq *irq = data; |
| struct emac_adapter *adpt = |
| container_of(irq, struct emac_adapter, irq); |
| struct emac_rx_queue *rx_q = &adpt->rx_q; |
| u32 isr, status; |
| |
| /* disable the interrupt */ |
| writel(0, adpt->base + EMAC_INT_MASK); |
| |
| isr = readl_relaxed(adpt->base + EMAC_INT_STATUS); |
| |
| status = isr & irq->mask; |
| if (status == 0) |
| goto exit; |
| |
| if (status & ISR_ERROR) { |
| netif_warn(adpt, intr, adpt->netdev, |
| "warning: error irq status 0x%lx\n", |
| status & ISR_ERROR); |
| /* reset MAC */ |
| schedule_work(&adpt->work_thread); |
| } |
| |
| /* Schedule the napi for receive queue with interrupt |
| * status bit set |
| */ |
| if (status & rx_q->intr) { |
| if (napi_schedule_prep(&rx_q->napi)) { |
| irq->mask &= ~rx_q->intr; |
| __napi_schedule(&rx_q->napi); |
| } |
| } |
| |
| if (status & TX_PKT_INT) |
| emac_mac_tx_process(adpt, &adpt->tx_q); |
| |
| if (status & ISR_OVER) |
| net_warn_ratelimited("warning: TX/RX overflow\n"); |
| |
| /* link event */ |
| if (status & ISR_GPHY_LINK) |
| phy_mac_interrupt(adpt->phydev, !!(status & GPHY_LINK_UP_INT)); |
| |
| exit: |
| /* enable the interrupt */ |
| writel(irq->mask, adpt->base + EMAC_INT_MASK); |
| |
| return IRQ_HANDLED; |
| } |
| |
| /* Configure VLAN tag strip/insert feature */ |
| static int emac_set_features(struct net_device *netdev, |
| netdev_features_t features) |
| { |
| netdev_features_t changed = features ^ netdev->features; |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| /* We only need to reprogram the hardware if the VLAN tag features |
| * have changed, and if it's already running. |
| */ |
| if (!(changed & (NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX))) |
| return 0; |
| |
| if (!netif_running(netdev)) |
| return 0; |
| |
| /* emac_mac_mode_config() uses netdev->features to configure the EMAC, |
| * so make sure it's set first. |
| */ |
| netdev->features = features; |
| |
| return emac_reinit_locked(adpt); |
| } |
| |
| /* Configure Multicast and Promiscuous modes */ |
| static void emac_rx_mode_set(struct net_device *netdev) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| struct netdev_hw_addr *ha; |
| |
| emac_mac_mode_config(adpt); |
| |
| /* update multicast address filtering */ |
| emac_mac_multicast_addr_clear(adpt); |
| netdev_for_each_mc_addr(ha, netdev) |
| emac_mac_multicast_addr_set(adpt, ha->addr); |
| } |
| |
| /* Change the Maximum Transfer Unit (MTU) */ |
| static int emac_change_mtu(struct net_device *netdev, int new_mtu) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| netif_info(adpt, hw, adpt->netdev, |
| "changing MTU from %d to %d\n", netdev->mtu, |
| new_mtu); |
| netdev->mtu = new_mtu; |
| |
| if (netif_running(netdev)) |
| return emac_reinit_locked(adpt); |
| |
| return 0; |
| } |
| |
| /* Called when the network interface is made active */ |
| static int emac_open(struct net_device *netdev) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| int ret; |
| |
| /* allocate rx/tx dma buffer & descriptors */ |
| ret = emac_mac_rx_tx_rings_alloc_all(adpt); |
| if (ret) { |
| netdev_err(adpt->netdev, "error allocating rx/tx rings\n"); |
| return ret; |
| } |
| |
| ret = emac_mac_up(adpt); |
| if (ret) { |
| emac_mac_rx_tx_rings_free_all(adpt); |
| return ret; |
| } |
| |
| emac_mac_start(adpt); |
| |
| return 0; |
| } |
| |
| /* Called when the network interface is disabled */ |
| static int emac_close(struct net_device *netdev) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| mutex_lock(&adpt->reset_lock); |
| |
| emac_mac_down(adpt); |
| emac_mac_rx_tx_rings_free_all(adpt); |
| |
| mutex_unlock(&adpt->reset_lock); |
| |
| return 0; |
| } |
| |
| /* Respond to a TX hang */ |
| static void emac_tx_timeout(struct net_device *netdev) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| schedule_work(&adpt->work_thread); |
| } |
| |
| /* IOCTL support for the interface */ |
| static int emac_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd) |
| { |
| if (!netif_running(netdev)) |
| return -EINVAL; |
| |
| if (!netdev->phydev) |
| return -ENODEV; |
| |
| return phy_mii_ioctl(netdev->phydev, ifr, cmd); |
| } |
| |
| /* Provide network statistics info for the interface */ |
| static struct rtnl_link_stats64 *emac_get_stats64(struct net_device *netdev, |
| struct rtnl_link_stats64 *net_stats) |
| { |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| unsigned int addr = REG_MAC_RX_STATUS_BIN; |
| struct emac_stats *stats = &adpt->stats; |
| u64 *stats_itr = &adpt->stats.rx_ok; |
| u32 val; |
| |
| spin_lock(&stats->lock); |
| |
| while (addr <= REG_MAC_RX_STATUS_END) { |
| val = readl_relaxed(adpt->base + addr); |
| *stats_itr += val; |
| stats_itr++; |
| addr += sizeof(u32); |
| } |
| |
| /* additional rx status */ |
| val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG23); |
| adpt->stats.rx_crc_align += val; |
| val = readl_relaxed(adpt->base + EMAC_RXMAC_STATC_REG24); |
| adpt->stats.rx_jabbers += val; |
| |
| /* update tx status */ |
| addr = REG_MAC_TX_STATUS_BIN; |
| stats_itr = &adpt->stats.tx_ok; |
| |
| while (addr <= REG_MAC_TX_STATUS_END) { |
| val = readl_relaxed(adpt->base + addr); |
| *stats_itr += val; |
| ++stats_itr; |
| addr += sizeof(u32); |
| } |
| |
| /* additional tx status */ |
| val = readl_relaxed(adpt->base + EMAC_TXMAC_STATC_REG25); |
| adpt->stats.tx_col += val; |
| |
| /* return parsed statistics */ |
| net_stats->rx_packets = stats->rx_ok; |
| net_stats->tx_packets = stats->tx_ok; |
| net_stats->rx_bytes = stats->rx_byte_cnt; |
| net_stats->tx_bytes = stats->tx_byte_cnt; |
| net_stats->multicast = stats->rx_mcast; |
| net_stats->collisions = stats->tx_1_col + stats->tx_2_col * 2 + |
| stats->tx_late_col + stats->tx_abort_col; |
| |
| net_stats->rx_errors = stats->rx_frag + stats->rx_fcs_err + |
| stats->rx_len_err + stats->rx_sz_ov + |
| stats->rx_align_err; |
| net_stats->rx_fifo_errors = stats->rx_rxf_ov; |
| net_stats->rx_length_errors = stats->rx_len_err; |
| net_stats->rx_crc_errors = stats->rx_fcs_err; |
| net_stats->rx_frame_errors = stats->rx_align_err; |
| net_stats->rx_over_errors = stats->rx_rxf_ov; |
| net_stats->rx_missed_errors = stats->rx_rxf_ov; |
| |
| net_stats->tx_errors = stats->tx_late_col + stats->tx_abort_col + |
| stats->tx_underrun + stats->tx_trunc; |
| net_stats->tx_fifo_errors = stats->tx_underrun; |
| net_stats->tx_aborted_errors = stats->tx_abort_col; |
| net_stats->tx_window_errors = stats->tx_late_col; |
| |
| spin_unlock(&stats->lock); |
| |
| return net_stats; |
| } |
| |
| static const struct net_device_ops emac_netdev_ops = { |
| .ndo_open = emac_open, |
| .ndo_stop = emac_close, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_start_xmit = emac_start_xmit, |
| .ndo_set_mac_address = eth_mac_addr, |
| .ndo_change_mtu = emac_change_mtu, |
| .ndo_do_ioctl = emac_ioctl, |
| .ndo_tx_timeout = emac_tx_timeout, |
| .ndo_get_stats64 = emac_get_stats64, |
| .ndo_set_features = emac_set_features, |
| .ndo_set_rx_mode = emac_rx_mode_set, |
| }; |
| |
| /* Watchdog task routine, called to reinitialize the EMAC */ |
| static void emac_work_thread(struct work_struct *work) |
| { |
| struct emac_adapter *adpt = |
| container_of(work, struct emac_adapter, work_thread); |
| |
| emac_reinit_locked(adpt); |
| } |
| |
| /* Initialize various data structures */ |
| static void emac_init_adapter(struct emac_adapter *adpt) |
| { |
| u32 reg; |
| |
| /* descriptors */ |
| adpt->tx_desc_cnt = EMAC_DEF_TX_DESCS; |
| adpt->rx_desc_cnt = EMAC_DEF_RX_DESCS; |
| |
| /* dma */ |
| adpt->dma_order = emac_dma_ord_out; |
| adpt->dmar_block = emac_dma_req_4096; |
| adpt->dmaw_block = emac_dma_req_128; |
| adpt->dmar_dly_cnt = DMAR_DLY_CNT_DEF; |
| adpt->dmaw_dly_cnt = DMAW_DLY_CNT_DEF; |
| adpt->tpd_burst = TXQ0_NUM_TPD_PREF_DEF; |
| adpt->rfd_burst = RXQ0_NUM_RFD_PREF_DEF; |
| |
| /* irq moderator */ |
| reg = ((EMAC_DEF_RX_IRQ_MOD >> 1) << IRQ_MODERATOR2_INIT_SHFT) | |
| ((EMAC_DEF_TX_IRQ_MOD >> 1) << IRQ_MODERATOR_INIT_SHFT); |
| adpt->irq_mod = reg; |
| |
| /* others */ |
| adpt->preamble = EMAC_PREAMBLE_DEF; |
| } |
| |
| /* Get the clock */ |
| static int emac_clks_get(struct platform_device *pdev, |
| struct emac_adapter *adpt) |
| { |
| unsigned int i; |
| |
| for (i = 0; i < EMAC_CLK_CNT; i++) { |
| struct clk *clk = devm_clk_get(&pdev->dev, emac_clk_name[i]); |
| |
| if (IS_ERR(clk)) { |
| dev_err(&pdev->dev, |
| "could not claim clock %s (error=%li)\n", |
| emac_clk_name[i], PTR_ERR(clk)); |
| |
| return PTR_ERR(clk); |
| } |
| |
| adpt->clk[i] = clk; |
| } |
| |
| return 0; |
| } |
| |
| /* Initialize clocks */ |
| static int emac_clks_phase1_init(struct platform_device *pdev, |
| struct emac_adapter *adpt) |
| { |
| int ret; |
| |
| /* On ACPI platforms, clocks are controlled by firmware and/or |
| * ACPI, not by drivers. |
| */ |
| if (has_acpi_companion(&pdev->dev)) |
| return 0; |
| |
| ret = emac_clks_get(pdev, adpt); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(adpt->clk[EMAC_CLK_AXI]); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(adpt->clk[EMAC_CLK_CFG_AHB]); |
| if (ret) |
| return ret; |
| |
| ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 19200000); |
| if (ret) |
| return ret; |
| |
| return clk_prepare_enable(adpt->clk[EMAC_CLK_HIGH_SPEED]); |
| } |
| |
| /* Enable clocks; needs emac_clks_phase1_init to be called before */ |
| static int emac_clks_phase2_init(struct platform_device *pdev, |
| struct emac_adapter *adpt) |
| { |
| int ret; |
| |
| if (has_acpi_companion(&pdev->dev)) |
| return 0; |
| |
| ret = clk_set_rate(adpt->clk[EMAC_CLK_TX], 125000000); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(adpt->clk[EMAC_CLK_TX]); |
| if (ret) |
| return ret; |
| |
| ret = clk_set_rate(adpt->clk[EMAC_CLK_HIGH_SPEED], 125000000); |
| if (ret) |
| return ret; |
| |
| ret = clk_set_rate(adpt->clk[EMAC_CLK_MDIO], 25000000); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(adpt->clk[EMAC_CLK_MDIO]); |
| if (ret) |
| return ret; |
| |
| ret = clk_prepare_enable(adpt->clk[EMAC_CLK_RX]); |
| if (ret) |
| return ret; |
| |
| return clk_prepare_enable(adpt->clk[EMAC_CLK_SYS]); |
| } |
| |
| static void emac_clks_teardown(struct emac_adapter *adpt) |
| { |
| |
| unsigned int i; |
| |
| for (i = 0; i < EMAC_CLK_CNT; i++) |
| clk_disable_unprepare(adpt->clk[i]); |
| } |
| |
| /* Get the resources */ |
| static int emac_probe_resources(struct platform_device *pdev, |
| struct emac_adapter *adpt) |
| { |
| struct net_device *netdev = adpt->netdev; |
| struct resource *res; |
| char maddr[ETH_ALEN]; |
| int ret = 0; |
| |
| /* get mac address */ |
| if (device_get_mac_address(&pdev->dev, maddr, ETH_ALEN)) |
| ether_addr_copy(netdev->dev_addr, maddr); |
| else |
| eth_hw_addr_random(netdev); |
| |
| /* Core 0 interrupt */ |
| ret = platform_get_irq(pdev, 0); |
| if (ret < 0) { |
| dev_err(&pdev->dev, |
| "error: missing core0 irq resource (error=%i)\n", ret); |
| return ret; |
| } |
| adpt->irq.irq = ret; |
| |
| /* base register address */ |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| adpt->base = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(adpt->base)) |
| return PTR_ERR(adpt->base); |
| |
| /* CSR register address */ |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 1); |
| adpt->csr = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(adpt->csr)) |
| return PTR_ERR(adpt->csr); |
| |
| netdev->base_addr = (unsigned long)adpt->base; |
| |
| return 0; |
| } |
| |
| static const struct of_device_id emac_dt_match[] = { |
| { |
| .compatible = "qcom,fsm9900-emac", |
| }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(of, emac_dt_match); |
| |
| #if IS_ENABLED(CONFIG_ACPI) |
| static const struct acpi_device_id emac_acpi_match[] = { |
| { |
| .id = "QCOM8070", |
| }, |
| {} |
| }; |
| MODULE_DEVICE_TABLE(acpi, emac_acpi_match); |
| #endif |
| |
| static int emac_probe(struct platform_device *pdev) |
| { |
| struct net_device *netdev; |
| struct emac_adapter *adpt; |
| struct emac_phy *phy; |
| u16 devid, revid; |
| u32 reg; |
| int ret; |
| |
| /* The EMAC itself is capable of 64-bit DMA, so try that first. */ |
| ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
| if (ret) { |
| /* Some platforms may restrict the EMAC's address bus to less |
| * then the size of DDR. In this case, we need to try a |
| * smaller mask. We could try every possible smaller mask, |
| * but that's overkill. Instead, just fall to 32-bit, which |
| * should always work. |
| */ |
| ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
| if (ret) { |
| dev_err(&pdev->dev, "could not set DMA mask\n"); |
| return ret; |
| } |
| } |
| |
| netdev = alloc_etherdev(sizeof(struct emac_adapter)); |
| if (!netdev) |
| return -ENOMEM; |
| |
| dev_set_drvdata(&pdev->dev, netdev); |
| SET_NETDEV_DEV(netdev, &pdev->dev); |
| |
| adpt = netdev_priv(netdev); |
| adpt->netdev = netdev; |
| adpt->msg_enable = EMAC_MSG_DEFAULT; |
| |
| phy = &adpt->phy; |
| |
| mutex_init(&adpt->reset_lock); |
| spin_lock_init(&adpt->stats.lock); |
| |
| adpt->irq.mask = RX_PKT_INT0 | IMR_NORMAL_MASK; |
| |
| ret = emac_probe_resources(pdev, adpt); |
| if (ret) |
| goto err_undo_netdev; |
| |
| /* initialize clocks */ |
| ret = emac_clks_phase1_init(pdev, adpt); |
| if (ret) { |
| dev_err(&pdev->dev, "could not initialize clocks\n"); |
| goto err_undo_netdev; |
| } |
| |
| netdev->watchdog_timeo = EMAC_WATCHDOG_TIME; |
| netdev->irq = adpt->irq.irq; |
| |
| adpt->rrd_size = EMAC_RRD_SIZE; |
| adpt->tpd_size = EMAC_TPD_SIZE; |
| adpt->rfd_size = EMAC_RFD_SIZE; |
| |
| netdev->netdev_ops = &emac_netdev_ops; |
| |
| emac_init_adapter(adpt); |
| |
| /* init external phy */ |
| ret = emac_phy_config(pdev, adpt); |
| if (ret) |
| goto err_undo_clocks; |
| |
| /* init internal sgmii phy */ |
| ret = emac_sgmii_config(pdev, adpt); |
| if (ret) |
| goto err_undo_mdiobus; |
| |
| /* enable clocks */ |
| ret = emac_clks_phase2_init(pdev, adpt); |
| if (ret) { |
| dev_err(&pdev->dev, "could not initialize clocks\n"); |
| goto err_undo_mdiobus; |
| } |
| |
| emac_mac_reset(adpt); |
| |
| /* set hw features */ |
| netdev->features = NETIF_F_SG | NETIF_F_HW_CSUM | NETIF_F_RXCSUM | |
| NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_HW_VLAN_CTAG_RX | |
| NETIF_F_HW_VLAN_CTAG_TX; |
| netdev->hw_features = netdev->features; |
| |
| netdev->vlan_features |= NETIF_F_SG | NETIF_F_HW_CSUM | |
| NETIF_F_TSO | NETIF_F_TSO6; |
| |
| /* MTU range: 46 - 9194 */ |
| netdev->min_mtu = EMAC_MIN_ETH_FRAME_SIZE - |
| (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); |
| netdev->max_mtu = EMAC_MAX_ETH_FRAME_SIZE - |
| (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN); |
| |
| INIT_WORK(&adpt->work_thread, emac_work_thread); |
| |
| /* Initialize queues */ |
| emac_mac_rx_tx_ring_init_all(pdev, adpt); |
| |
| netif_napi_add(netdev, &adpt->rx_q.napi, emac_napi_rtx, |
| NAPI_POLL_WEIGHT); |
| |
| ret = register_netdev(netdev); |
| if (ret) { |
| dev_err(&pdev->dev, "could not register net device\n"); |
| goto err_undo_napi; |
| } |
| |
| reg = readl_relaxed(adpt->base + EMAC_DMA_MAS_CTRL); |
| devid = (reg & DEV_ID_NUM_BMSK) >> DEV_ID_NUM_SHFT; |
| revid = (reg & DEV_REV_NUM_BMSK) >> DEV_REV_NUM_SHFT; |
| reg = readl_relaxed(adpt->base + EMAC_CORE_HW_VERSION); |
| |
| netif_info(adpt, probe, netdev, |
| "hardware id %d.%d, hardware version %d.%d.%d\n", |
| devid, revid, |
| (reg & MAJOR_BMSK) >> MAJOR_SHFT, |
| (reg & MINOR_BMSK) >> MINOR_SHFT, |
| (reg & STEP_BMSK) >> STEP_SHFT); |
| |
| return 0; |
| |
| err_undo_napi: |
| netif_napi_del(&adpt->rx_q.napi); |
| err_undo_mdiobus: |
| if (!has_acpi_companion(&pdev->dev)) |
| put_device(&adpt->phydev->mdio.dev); |
| mdiobus_unregister(adpt->mii_bus); |
| err_undo_clocks: |
| emac_clks_teardown(adpt); |
| err_undo_netdev: |
| free_netdev(netdev); |
| |
| return ret; |
| } |
| |
| static int emac_remove(struct platform_device *pdev) |
| { |
| struct net_device *netdev = dev_get_drvdata(&pdev->dev); |
| struct emac_adapter *adpt = netdev_priv(netdev); |
| |
| unregister_netdev(netdev); |
| netif_napi_del(&adpt->rx_q.napi); |
| |
| emac_clks_teardown(adpt); |
| |
| if (!has_acpi_companion(&pdev->dev)) |
| put_device(&adpt->phydev->mdio.dev); |
| mdiobus_unregister(adpt->mii_bus); |
| free_netdev(netdev); |
| |
| if (adpt->phy.digital) |
| iounmap(adpt->phy.digital); |
| iounmap(adpt->phy.base); |
| |
| return 0; |
| } |
| |
| static struct platform_driver emac_platform_driver = { |
| .probe = emac_probe, |
| .remove = emac_remove, |
| .driver = { |
| .name = "qcom-emac", |
| .of_match_table = emac_dt_match, |
| .acpi_match_table = ACPI_PTR(emac_acpi_match), |
| }, |
| }; |
| |
| module_platform_driver(emac_platform_driver); |
| |
| MODULE_LICENSE("GPL v2"); |
| MODULE_ALIAS("platform:qcom-emac"); |