/** * Microchip ENCX24J600 ethernet driver * * Copyright (C) 2015 Gridpoint * Author: Jon Ringle * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * */ #include #include #include #include #include #include #include #include #include #include #include #include "encx24j600_hw.h" #define DRV_NAME "encx24j600" #define DRV_VERSION "1.0" #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_LINK) static int debug = -1; module_param(debug, int, 0); MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)"); /* SRAM memory layout: * * 0x0000-0x05ff TX buffers 1.5KB (1*1536) reside in the GP area in SRAM * 0x0600-0x5fff RX buffers 22.5KB (15*1536) reside in the RX area in SRAM */ #define ENC_TX_BUF_START 0x0000U #define ENC_RX_BUF_START 0x0600U #define ENC_RX_BUF_END 0x5fffU #define ENC_SRAM_SIZE 0x6000U enum { RXFILTER_NORMAL, RXFILTER_MULTI, RXFILTER_PROMISC }; struct encx24j600_priv { struct net_device *ndev; struct mutex lock; /* device access lock */ struct encx24j600_context ctx; struct sk_buff *tx_skb; struct task_struct *kworker_task; struct kthread_worker kworker; struct kthread_work tx_work; struct kthread_work setrx_work; u16 next_packet; bool hw_enabled; bool full_duplex; bool autoneg; u16 speed; int rxfilter; u32 msg_enable; }; static void dump_packet(const char *msg, int len, const char *data) { pr_debug(DRV_NAME ": %s - packet len:%d\n", msg, len); print_hex_dump_bytes("pk data: ", DUMP_PREFIX_OFFSET, data, len); } static void encx24j600_dump_rsv(struct encx24j600_priv *priv, const char *msg, struct rsv *rsv) { struct net_device *dev = priv->ndev; netdev_info(dev, "RX packet Len:%d\n", rsv->len); netdev_dbg(dev, "%s - NextPk: 0x%04x\n", msg, rsv->next_packet); netdev_dbg(dev, "RxOK: %d, DribbleNibble: %d\n", RSV_GETBIT(rsv->rxstat, RSV_RXOK), RSV_GETBIT(rsv->rxstat, RSV_DRIBBLENIBBLE)); netdev_dbg(dev, "CRCErr:%d, LenChkErr: %d, LenOutOfRange: %d\n", RSV_GETBIT(rsv->rxstat, RSV_CRCERROR), RSV_GETBIT(rsv->rxstat, RSV_LENCHECKERR), RSV_GETBIT(rsv->rxstat, RSV_LENOUTOFRANGE)); netdev_dbg(dev, "Multicast: %d, Broadcast: %d, LongDropEvent: %d, CarrierEvent: %d\n", RSV_GETBIT(rsv->rxstat, RSV_RXMULTICAST), RSV_GETBIT(rsv->rxstat, RSV_RXBROADCAST), RSV_GETBIT(rsv->rxstat, RSV_RXLONGEVDROPEV), RSV_GETBIT(rsv->rxstat, RSV_CARRIEREV)); netdev_dbg(dev, "ControlFrame: %d, PauseFrame: %d, UnknownOp: %d, VLanTagFrame: %d\n", RSV_GETBIT(rsv->rxstat, RSV_RXCONTROLFRAME), RSV_GETBIT(rsv->rxstat, RSV_RXPAUSEFRAME), RSV_GETBIT(rsv->rxstat, RSV_RXUNKNOWNOPCODE), RSV_GETBIT(rsv->rxstat, RSV_RXTYPEVLAN)); } static u16 encx24j600_read_reg(struct encx24j600_priv *priv, u8 reg) { struct net_device *dev = priv->ndev; unsigned int val = 0; int ret = regmap_read(priv->ctx.regmap, reg, &val); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d reading reg %02x\n", __func__, ret, reg); return val; } static void encx24j600_write_reg(struct encx24j600_priv *priv, u8 reg, u16 val) { struct net_device *dev = priv->ndev; int ret = regmap_write(priv->ctx.regmap, reg, val); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d writing reg %02x=%04x\n", __func__, ret, reg, val); } static void encx24j600_update_reg(struct encx24j600_priv *priv, u8 reg, u16 mask, u16 val) { struct net_device *dev = priv->ndev; int ret = regmap_update_bits(priv->ctx.regmap, reg, mask, val); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d updating reg %02x=%04x~%04x\n", __func__, ret, reg, val, mask); } static u16 encx24j600_read_phy(struct encx24j600_priv *priv, u8 reg) { struct net_device *dev = priv->ndev; unsigned int val = 0; int ret = regmap_read(priv->ctx.phymap, reg, &val); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d reading %02x\n", __func__, ret, reg); return val; } static void encx24j600_write_phy(struct encx24j600_priv *priv, u8 reg, u16 val) { struct net_device *dev = priv->ndev; int ret = regmap_write(priv->ctx.phymap, reg, val); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d writing reg %02x=%04x\n", __func__, ret, reg, val); } static void encx24j600_clr_bits(struct encx24j600_priv *priv, u8 reg, u16 mask) { encx24j600_update_reg(priv, reg, mask, 0); } static void encx24j600_set_bits(struct encx24j600_priv *priv, u8 reg, u16 mask) { encx24j600_update_reg(priv, reg, mask, mask); } static void encx24j600_cmd(struct encx24j600_priv *priv, u8 cmd) { struct net_device *dev = priv->ndev; int ret = regmap_write(priv->ctx.regmap, cmd, 0); if (unlikely(ret)) netif_err(priv, drv, dev, "%s: error %d with cmd %02x\n", __func__, ret, cmd); } static int encx24j600_raw_read(struct encx24j600_priv *priv, u8 reg, u8 *data, size_t count) { int ret; mutex_lock(&priv->ctx.mutex); ret = regmap_encx24j600_spi_read(&priv->ctx, reg, data, count); mutex_unlock(&priv->ctx.mutex); return ret; } static int encx24j600_raw_write(struct encx24j600_priv *priv, u8 reg, const u8 *data, size_t count) { int ret; mutex_lock(&priv->ctx.mutex); ret = regmap_encx24j600_spi_write(&priv->ctx, reg, data, count); mutex_unlock(&priv->ctx.mutex); return ret; } static void encx24j600_update_phcon1(struct encx24j600_priv *priv) { u16 phcon1 = encx24j600_read_phy(priv, PHCON1); if (priv->autoneg == AUTONEG_ENABLE) { phcon1 |= ANEN | RENEG; } else { phcon1 &= ~ANEN; if (priv->speed == SPEED_100) phcon1 |= SPD100; else phcon1 &= ~SPD100; if (priv->full_duplex) phcon1 |= PFULDPX; else phcon1 &= ~PFULDPX; } encx24j600_write_phy(priv, PHCON1, phcon1); } /* Waits for autonegotiation to complete. */ static int encx24j600_wait_for_autoneg(struct encx24j600_priv *priv) { struct net_device *dev = priv->ndev; unsigned long timeout = jiffies + msecs_to_jiffies(2000); u16 phstat1; u16 estat; int ret = 0; phstat1 = encx24j600_read_phy(priv, PHSTAT1); while ((phstat1 & ANDONE) == 0) { if (time_after(jiffies, timeout)) { u16 phstat3; netif_notice(priv, drv, dev, "timeout waiting for autoneg done\n"); priv->autoneg = AUTONEG_DISABLE; phstat3 = encx24j600_read_phy(priv, PHSTAT3); priv->speed = (phstat3 & PHY3SPD100) ? SPEED_100 : SPEED_10; priv->full_duplex = (phstat3 & PHY3DPX) ? 1 : 0; encx24j600_update_phcon1(priv); netif_notice(priv, drv, dev, "Using parallel detection: %s/%s", priv->speed == SPEED_100 ? "100" : "10", priv->full_duplex ? "Full" : "Half"); return -ETIMEDOUT; } cpu_relax(); phstat1 = encx24j600_read_phy(priv, PHSTAT1); } estat = encx24j600_read_reg(priv, ESTAT); if (estat & PHYDPX) { encx24j600_set_bits(priv, MACON2, FULDPX); encx24j600_write_reg(priv, MABBIPG, 0x15); } else { encx24j600_clr_bits(priv, MACON2, FULDPX); encx24j600_write_reg(priv, MABBIPG, 0x12); /* Max retransmittions attempt */ encx24j600_write_reg(priv, MACLCON, 0x370f); } return ret; } /* Access the PHY to determine link status */ static void encx24j600_check_link_status(struct encx24j600_priv *priv) { struct net_device *dev = priv->ndev; u16 estat; estat = encx24j600_read_reg(priv, ESTAT); if (estat & PHYLNK) { if (priv->autoneg == AUTONEG_ENABLE) encx24j600_wait_for_autoneg(priv); netif_carrier_on(dev); netif_info(priv, ifup, dev, "link up\n"); } else { netif_info(priv, ifdown, dev, "link down\n"); /* Re-enable autoneg since we won't know what we might be * connected to when the link is brought back up again. */ priv->autoneg = AUTONEG_ENABLE; priv->full_duplex = true; priv->speed = SPEED_100; netif_carrier_off(dev); } } static void encx24j600_int_link_handler(struct encx24j600_priv *priv) { struct net_device *dev = priv->ndev; netif_dbg(priv, intr, dev, "%s", __func__); encx24j600_check_link_status(priv); encx24j600_clr_bits(priv, EIR, LINKIF); } static void encx24j600_tx_complete(struct encx24j600_priv *priv, bool err) { struct net_device *dev = priv->ndev; mutex_lock(&priv->lock); if (err) dev->stats.tx_errors++; else dev->stats.tx_packets++; dev->stats.tx_bytes += priv->tx_skb->len; encx24j600_clr_bits(priv, EIR, TXIF | TXABTIF); netif_dbg(priv, tx_done, dev, "TX Done%s\n", err ? ": Err" : ""); if (priv->tx_skb) { dev_kfree_skb(priv->tx_skb); priv->tx_skb = NULL; } netif_wake_queue(dev); mutex_unlock(&priv->lock); } static int encx24j600_receive_packet(struct encx24j600_priv *priv, struct rsv *rsv) { struct net_device *dev = priv->ndev; struct sk_buff *skb = netdev_alloc_skb(dev, rsv->len + NET_IP_ALIGN); if (!skb) { pr_err_ratelimited("RX: OOM: packet dropped\n"); dev->stats.rx_dropped++; return -ENOMEM; } skb_reserve(skb, NET_IP_ALIGN); encx24j600_raw_read(priv, RRXDATA, skb_put(skb, rsv->len), rsv->len); if (netif_msg_pktdata(priv)) dump_packet("RX", skb->len, skb->data); skb->dev = dev; skb->protocol = eth_type_trans(skb, dev); skb->ip_summed = CHECKSUM_COMPLETE; /* Maintain stats */ dev->stats.rx_packets++; dev->stats.rx_bytes += rsv->len; priv->next_packet = rsv->next_packet; netif_rx(skb); return 0; } static void encx24j600_rx_packets(struct encx24j600_priv *priv, u8 packet_count) { struct net_device *dev = priv->ndev; while (packet_count--) { struct rsv rsv; u16 newrxtail; encx24j600_write_reg(priv, ERXRDPT, priv->next_packet); encx24j600_raw_read(priv, RRXDATA, (u8 *)&rsv, sizeof(rsv)); if (netif_msg_rx_status(priv)) encx24j600_dump_rsv(priv, __func__, &rsv); if (!RSV_GETBIT(rsv.rxstat, RSV_RXOK) || (rsv.len > MAX_FRAMELEN)) { netif_err(priv, rx_err, dev, "RX Error %04x\n", rsv.rxstat); dev->stats.rx_errors++; if (RSV_GETBIT(rsv.rxstat, RSV_CRCERROR)) dev->stats.rx_crc_errors++; if (RSV_GETBIT(rsv.rxstat, RSV_LENCHECKERR)) dev->stats.rx_frame_errors++; if (rsv.len > MAX_FRAMELEN) dev->stats.rx_over_errors++; } else { encx24j600_receive_packet(priv, &rsv); } newrxtail = priv->next_packet - 2; if (newrxtail == ENC_RX_BUF_START) newrxtail = SRAM_SIZE - 2; encx24j600_cmd(priv, SETPKTDEC); encx24j600_write_reg(priv, ERXTAIL, newrxtail); } } static irqreturn_t encx24j600_isr(int irq, void *dev_id) { struct encx24j600_priv *priv = dev_id; struct net_device *dev = priv->ndev; int eir; /* Clear interrupts */ encx24j600_cmd(priv, CLREIE); eir = encx24j600_read_reg(priv, EIR); if (eir & LINKIF) encx24j600_int_link_handler(priv); if (eir & TXIF) encx24j600_tx_complete(priv, false); if (eir & TXABTIF) encx24j600_tx_complete(priv, true); if (eir & RXABTIF) { if (eir & PCFULIF) { /* Packet counter is full */ netif_err(priv, rx_err, dev, "Packet counter full\n"); } dev->stats.rx_dropped++; encx24j600_clr_bits(priv, EIR, RXABTIF); } if (eir & PKTIF) { u8 packet_count; mutex_lock(&priv->lock); packet_count = encx24j600_read_reg(priv, ESTAT) & 0xff; while (packet_count) { encx24j600_rx_packets(priv, packet_count); packet_count = encx24j600_read_reg(priv, ESTAT) & 0xff; } mutex_unlock(&priv->lock); } /* Enable interrupts */ encx24j600_cmd(priv, SETEIE); return IRQ_HANDLED; } static int encx24j600_soft_reset(struct encx24j600_priv *priv) { int ret = 0; int timeout; u16 eudast; /* Write and verify a test value to EUDAST */ regcache_cache_bypass(priv->ctx.regmap, true); timeout = 10; do { encx24j600_write_reg(priv, EUDAST, EUDAST_TEST_VAL); eudast = encx24j600_read_reg(priv, EUDAST); usleep_range(25, 100); } while ((eudast != EUDAST_TEST_VAL) && --timeout); regcache_cache_bypass(priv->ctx.regmap, false); if (timeout == 0) { ret = -ETIMEDOUT; goto err_out; } /* Wait for CLKRDY to become set */ timeout = 10; while (!(encx24j600_read_reg(priv, ESTAT) & CLKRDY) && --timeout) usleep_range(25, 100); if (timeout == 0) { ret = -ETIMEDOUT; goto err_out; } /* Issue a System Reset command */ encx24j600_cmd(priv, SETETHRST); usleep_range(25, 100); /* Confirm that EUDAST has 0000h after system reset */ if (encx24j600_read_reg(priv, EUDAST) != 0) { ret = -EINVAL; goto err_out; } /* Wait for PHY register and status bits to become available */ usleep_range(256, 1000); err_out: return ret; } static int encx24j600_hw_reset(struct encx24j600_priv *priv) { int ret; mutex_lock(&priv->lock); ret = encx24j600_soft_reset(priv); mutex_unlock(&priv->lock); return ret; } static void encx24j600_reset_hw_tx(struct encx24j600_priv *priv) { encx24j600_set_bits(priv, ECON2, TXRST); encx24j600_clr_bits(priv, ECON2, TXRST); } static void encx24j600_hw_init_tx(struct encx24j600_priv *priv) { /* Reset TX */ encx24j600_reset_hw_tx(priv); /* Clear the TXIF flag if were previously set */ encx24j600_clr_bits(priv, EIR, TXIF | TXABTIF); /* Write the Tx Buffer pointer */ encx24j600_write_reg(priv, EGPWRPT, ENC_TX_BUF_START); } static void encx24j600_hw_init_rx(struct encx24j600_priv *priv) { encx24j600_cmd(priv, DISABLERX); /* Set up RX packet start address in the SRAM */ encx24j600_write_reg(priv, ERXST, ENC_RX_BUF_START); /* Preload the RX Data pointer to the beginning of the RX area */ encx24j600_write_reg(priv, ERXRDPT, ENC_RX_BUF_START); priv->next_packet = ENC_RX_BUF_START; /* Set up RX end address in the SRAM */ encx24j600_write_reg(priv, ERXTAIL, ENC_SRAM_SIZE - 2); /* Reset the user data pointers */ encx24j600_write_reg(priv, EUDAST, ENC_SRAM_SIZE); encx24j600_write_reg(priv, EUDAND, ENC_SRAM_SIZE + 1); /* Set Max Frame length */ encx24j600_write_reg(priv, MAMXFL, MAX_FRAMELEN); } static void encx24j600_dump_config(struct encx24j600_priv *priv, const char *msg) { pr_info(DRV_NAME ": %s\n", msg); /* CHIP configuration */ pr_info(DRV_NAME " ECON1: %04X\n", encx24j600_read_reg(priv, ECON1)); pr_info(DRV_NAME " ECON2: %04X\n", encx24j600_read_reg(priv, ECON2)); pr_info(DRV_NAME " ERXFCON: %04X\n", encx24j600_read_reg(priv, ERXFCON)); pr_info(DRV_NAME " ESTAT: %04X\n", encx24j600_read_reg(priv, ESTAT)); pr_info(DRV_NAME " EIR: %04X\n", encx24j600_read_reg(priv, EIR)); pr_info(DRV_NAME " EIDLED: %04X\n", encx24j600_read_reg(priv, EIDLED)); /* MAC layer configuration */ pr_info(DRV_NAME " MACON1: %04X\n", encx24j600_read_reg(priv, MACON1)); pr_info(DRV_NAME " MACON2: %04X\n", encx24j600_read_reg(priv, MACON2)); pr_info(DRV_NAME " MAIPG: %04X\n", encx24j600_read_reg(priv, MAIPG)); pr_info(DRV_NAME " MACLCON: %04X\n", encx24j600_read_reg(priv, MACLCON)); pr_info(DRV_NAME " MABBIPG: %04X\n", encx24j600_read_reg(priv, MABBIPG)); /* PHY configuation */ pr_info(DRV_NAME " PHCON1: %04X\n", encx24j600_read_phy(priv, PHCON1)); pr_info(DRV_NAME " PHCON2: %04X\n", encx24j600_read_phy(priv, PHCON2)); pr_info(DRV_NAME " PHANA: %04X\n", encx24j600_read_phy(priv, PHANA)); pr_info(DRV_NAME " PHANLPA: %04X\n", encx24j600_read_phy(priv, PHANLPA)); pr_info(DRV_NAME " PHANE: %04X\n", encx24j600_read_phy(priv, PHANE)); pr_info(DRV_NAME " PHSTAT1: %04X\n", encx24j600_read_phy(priv, PHSTAT1)); pr_info(DRV_NAME " PHSTAT2: %04X\n", encx24j600_read_phy(priv, PHSTAT2)); pr_info(DRV_NAME " PHSTAT3: %04X\n", encx24j600_read_phy(priv, PHSTAT3)); } static void encx24j600_set_rxfilter_mode(struct encx24j600_priv *priv) { switch (priv->rxfilter) { case RXFILTER_PROMISC: encx24j600_set_bits(priv, MACON1, PASSALL); encx24j600_write_reg(priv, ERXFCON, UCEN | MCEN | NOTMEEN); break; case RXFILTER_MULTI: encx24j600_clr_bits(priv, MACON1, PASSALL); encx24j600_write_reg(priv, ERXFCON, UCEN | CRCEN | BCEN | MCEN); break; case RXFILTER_NORMAL: default: encx24j600_clr_bits(priv, MACON1, PASSALL); encx24j600_write_reg(priv, ERXFCON, UCEN | CRCEN | BCEN); break; } } static int encx24j600_hw_init(struct encx24j600_priv *priv) { struct net_device *dev = priv->ndev; int ret = 0; u16 eidled; u16 macon2; priv->hw_enabled = false; eidled = encx24j600_read_reg(priv, EIDLED); if (((eidled & DEVID_MASK) >> DEVID_SHIFT) != ENCX24J600_DEV_ID) { ret = -EINVAL; goto err_out; } netif_info(priv, drv, dev, "Silicon rev ID: 0x%02x\n", (eidled & REVID_MASK) >> REVID_SHIFT); /* PHY Leds: link status, * LEDA: Link + transmit/receive events * LEDB: Link State + colision events */ encx24j600_update_reg(priv, EIDLED, 0xbc00, 0xbc00); /* Loopback disabled */ encx24j600_write_reg(priv, MACON1, 0x9); /* interpacket gap value */ encx24j600_write_reg(priv, MAIPG, 0x0c12); /* Write the auto negotiation pattern */ encx24j600_write_phy(priv, PHANA, PHANA_DEFAULT); encx24j600_update_phcon1(priv); encx24j600_check_link_status(priv); macon2 = MACON2_RSV1 | TXCRCEN | PADCFG0 | PADCFG2 | MACON2_DEFER; if ((priv->autoneg == AUTONEG_DISABLE) && priv->full_duplex) macon2 |= FULDPX; encx24j600_set_bits(priv, MACON2, macon2); priv->rxfilter = RXFILTER_NORMAL; encx24j600_set_rxfilter_mode(priv); /* Program the Maximum frame length */ encx24j600_write_reg(priv, MAMXFL, MAX_FRAMELEN); /* Init Tx pointers */ encx24j600_hw_init_tx(priv); /* Init Rx pointers */ encx24j600_hw_init_rx(priv); if (netif_msg_hw(priv)) encx24j600_dump_config(priv, "Hw is initialized"); err_out: return ret; } static void encx24j600_hw_enable(struct encx24j600_priv *priv) { /* Clear the interrupt flags in case was set */ encx24j600_clr_bits(priv, EIR, (PCFULIF | RXABTIF | TXABTIF | TXIF | PKTIF | LINKIF)); /* Enable the interrupts */ encx24j600_write_reg(priv, EIE, (PCFULIE | RXABTIE | TXABTIE | TXIE | PKTIE | LINKIE | INTIE)); /* Enable RX */ encx24j600_cmd(priv, ENABLERX); priv->hw_enabled = true; } static void encx24j600_hw_disable(struct encx24j600_priv *priv) { /* Disable all interrupts */ encx24j600_write_reg(priv, EIE, 0); /* Disable RX */ encx24j600_cmd(priv, DISABLERX); priv->hw_enabled = false; } static int encx24j600_setlink(struct net_device *dev, u8 autoneg, u16 speed, u8 duplex) { struct encx24j600_priv *priv = netdev_priv(dev); int ret = 0; if (!priv->hw_enabled) { /* link is in low power mode now; duplex setting * will take effect on next encx24j600_hw_init() */ if (speed == SPEED_10 || speed == SPEED_100) { priv->autoneg = (autoneg == AUTONEG_ENABLE); priv->full_duplex = (duplex == DUPLEX_FULL); priv->speed = (speed == SPEED_100); } else { netif_warn(priv, link, dev, "unsupported link speed setting\n"); /*speeds other than SPEED_10 and SPEED_100 */ /*are not supported by chip */ ret = -EOPNOTSUPP; } } else { netif_warn(priv, link, dev, "Warning: hw must be disabled to set link mode\n"); ret = -EBUSY; } return ret; } static void encx24j600_hw_get_macaddr(struct encx24j600_priv *priv, unsigned char *ethaddr) { unsigned short val; val = encx24j600_read_reg(priv, MAADR1); ethaddr[0] = val & 0x00ff; ethaddr[1] = (val & 0xff00) >> 8; val = encx24j600_read_reg(priv, MAADR2); ethaddr[2] = val & 0x00ffU; ethaddr[3] = (val & 0xff00U) >> 8; val = encx24j600_read_reg(priv, MAADR3); ethaddr[4] = val & 0x00ffU; ethaddr[5] = (val & 0xff00U) >> 8; } /* Program the hardware MAC address from dev->dev_addr.*/ static int encx24j600_set_hw_macaddr(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); if (priv->hw_enabled) { netif_info(priv, drv, dev, "Hardware must be disabled to set Mac address\n"); return -EBUSY; } mutex_lock(&priv->lock); netif_info(priv, drv, dev, "%s: Setting MAC address to %pM\n", dev->name, dev->dev_addr); encx24j600_write_reg(priv, MAADR3, (dev->dev_addr[4] | dev->dev_addr[5] << 8)); encx24j600_write_reg(priv, MAADR2, (dev->dev_addr[2] | dev->dev_addr[3] << 8)); encx24j600_write_reg(priv, MAADR1, (dev->dev_addr[0] | dev->dev_addr[1] << 8)); mutex_unlock(&priv->lock); return 0; } /* Store the new hardware address in dev->dev_addr, and update the MAC.*/ static int encx24j600_set_mac_address(struct net_device *dev, void *addr) { struct sockaddr *address = addr; if (netif_running(dev)) return -EBUSY; if (!is_valid_ether_addr(address->sa_data)) return -EADDRNOTAVAIL; memcpy(dev->dev_addr, address->sa_data, dev->addr_len); return encx24j600_set_hw_macaddr(dev); } static int encx24j600_open(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); int ret = request_threaded_irq(priv->ctx.spi->irq, NULL, encx24j600_isr, IRQF_TRIGGER_FALLING | IRQF_ONESHOT, DRV_NAME, priv); if (unlikely(ret < 0)) { netdev_err(dev, "request irq %d failed (ret = %d)\n", priv->ctx.spi->irq, ret); return ret; } encx24j600_hw_disable(priv); encx24j600_hw_init(priv); encx24j600_hw_enable(priv); netif_start_queue(dev); return 0; } static int encx24j600_stop(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); netif_stop_queue(dev); free_irq(priv->ctx.spi->irq, priv); return 0; } static void encx24j600_setrx_proc(struct kthread_work *ws) { struct encx24j600_priv *priv = container_of(ws, struct encx24j600_priv, setrx_work); mutex_lock(&priv->lock); encx24j600_set_rxfilter_mode(priv); mutex_unlock(&priv->lock); } static void encx24j600_set_multicast_list(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); int oldfilter = priv->rxfilter; if (dev->flags & IFF_PROMISC) { netif_dbg(priv, link, dev, "promiscuous mode\n"); priv->rxfilter = RXFILTER_PROMISC; } else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) { netif_dbg(priv, link, dev, "%smulticast mode\n", (dev->flags & IFF_ALLMULTI) ? "all-" : ""); priv->rxfilter = RXFILTER_MULTI; } else { netif_dbg(priv, link, dev, "normal mode\n"); priv->rxfilter = RXFILTER_NORMAL; } if (oldfilter != priv->rxfilter) queue_kthread_work(&priv->kworker, &priv->setrx_work); } static void encx24j600_hw_tx(struct encx24j600_priv *priv) { struct net_device *dev = priv->ndev; netif_info(priv, tx_queued, dev, "TX Packet Len:%d\n", priv->tx_skb->len); if (netif_msg_pktdata(priv)) dump_packet("TX", priv->tx_skb->len, priv->tx_skb->data); if (encx24j600_read_reg(priv, EIR) & TXABTIF) /* Last transmition aborted due to error. Reset TX interface */ encx24j600_reset_hw_tx(priv); /* Clear the TXIF flag if were previously set */ encx24j600_clr_bits(priv, EIR, TXIF); /* Set the data pointer to the TX buffer address in the SRAM */ encx24j600_write_reg(priv, EGPWRPT, ENC_TX_BUF_START); /* Copy the packet into the SRAM */ encx24j600_raw_write(priv, WGPDATA, (u8 *)priv->tx_skb->data, priv->tx_skb->len); /* Program the Tx buffer start pointer */ encx24j600_write_reg(priv, ETXST, ENC_TX_BUF_START); /* Program the packet length */ encx24j600_write_reg(priv, ETXLEN, priv->tx_skb->len); /* Start the transmission */ encx24j600_cmd(priv, SETTXRTS); } static void encx24j600_tx_proc(struct kthread_work *ws) { struct encx24j600_priv *priv = container_of(ws, struct encx24j600_priv, tx_work); mutex_lock(&priv->lock); encx24j600_hw_tx(priv); mutex_unlock(&priv->lock); } static netdev_tx_t encx24j600_tx(struct sk_buff *skb, struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); netif_stop_queue(dev); /* save the timestamp */ dev->trans_start = jiffies; /* Remember the skb for deferred processing */ priv->tx_skb = skb; queue_kthread_work(&priv->kworker, &priv->tx_work); return NETDEV_TX_OK; } /* Deal with a transmit timeout */ static void encx24j600_tx_timeout(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); netif_err(priv, tx_err, dev, "TX timeout at %ld, latency %ld\n", jiffies, jiffies - dev->trans_start); dev->stats.tx_errors++; netif_wake_queue(dev); return; } static int encx24j600_get_regs_len(struct net_device *dev) { return SFR_REG_COUNT; } static void encx24j600_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) { struct encx24j600_priv *priv = netdev_priv(dev); u16 *buff = p; u8 reg; regs->version = 1; mutex_lock(&priv->lock); for (reg = 0; reg < SFR_REG_COUNT; reg += 2) { unsigned int val = 0; /* ignore errors for unreadable registers */ regmap_read(priv->ctx.regmap, reg, &val); buff[reg] = val & 0xffff; } mutex_unlock(&priv->lock); } static void encx24j600_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info) { strlcpy(info->driver, DRV_NAME, sizeof(info->driver)); strlcpy(info->version, DRV_VERSION, sizeof(info->version)); strlcpy(info->bus_info, dev_name(dev->dev.parent), sizeof(info->bus_info)); } static int encx24j600_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { struct encx24j600_priv *priv = netdev_priv(dev); cmd->transceiver = XCVR_INTERNAL; cmd->supported = SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | SUPPORTED_Autoneg | SUPPORTED_TP; ethtool_cmd_speed_set(cmd, priv->speed); cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; cmd->port = PORT_TP; cmd->autoneg = priv->autoneg ? AUTONEG_ENABLE : AUTONEG_DISABLE; return 0; } static int encx24j600_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) { return encx24j600_setlink(dev, cmd->autoneg, ethtool_cmd_speed(cmd), cmd->duplex); } static u32 encx24j600_get_msglevel(struct net_device *dev) { struct encx24j600_priv *priv = netdev_priv(dev); return priv->msg_enable; } static void encx24j600_set_msglevel(struct net_device *dev, u32 val) { struct encx24j600_priv *priv = netdev_priv(dev); priv->msg_enable = val; } static const struct ethtool_ops encx24j600_ethtool_ops = { .get_settings = encx24j600_get_settings, .set_settings = encx24j600_set_settings, .get_drvinfo = encx24j600_get_drvinfo, .get_msglevel = encx24j600_get_msglevel, .set_msglevel = encx24j600_set_msglevel, .get_regs_len = encx24j600_get_regs_len, .get_regs = encx24j600_get_regs, }; static const struct net_device_ops encx24j600_netdev_ops = { .ndo_open = encx24j600_open, .ndo_stop = encx24j600_stop, .ndo_start_xmit = encx24j600_tx, .ndo_set_rx_mode = encx24j600_set_multicast_list, .ndo_set_mac_address = encx24j600_set_mac_address, .ndo_tx_timeout = encx24j600_tx_timeout, .ndo_validate_addr = eth_validate_addr, }; static int encx24j600_spi_probe(struct spi_device *spi) { int ret; struct net_device *ndev; struct encx24j600_priv *priv; ndev = alloc_etherdev(sizeof(struct encx24j600_priv)); if (!ndev) { ret = -ENOMEM; goto error_out; } priv = netdev_priv(ndev); spi_set_drvdata(spi, priv); dev_set_drvdata(&spi->dev, priv); SET_NETDEV_DEV(ndev, &spi->dev); priv->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); priv->ndev = ndev; /* Default configuration PHY configuration */ priv->full_duplex = true; priv->autoneg = AUTONEG_ENABLE; priv->speed = SPEED_100; priv->ctx.spi = spi; devm_regmap_init_encx24j600(&spi->dev, &priv->ctx); ndev->irq = spi->irq; ndev->netdev_ops = &encx24j600_netdev_ops; mutex_init(&priv->lock); /* Reset device and check if it is connected */ if (encx24j600_hw_reset(priv)) { netif_err(priv, probe, ndev, DRV_NAME ": Chip is not detected\n"); ret = -EIO; goto out_free; } /* Initialize the device HW to the consistent state */ if (encx24j600_hw_init(priv)) { netif_err(priv, probe, ndev, DRV_NAME ": HW initialization error\n"); ret = -EIO; goto out_free; } init_kthread_worker(&priv->kworker); init_kthread_work(&priv->tx_work, encx24j600_tx_proc); init_kthread_work(&priv->setrx_work, encx24j600_setrx_proc); priv->kworker_task = kthread_run(kthread_worker_fn, &priv->kworker, "encx24j600"); if (IS_ERR(priv->kworker_task)) { ret = PTR_ERR(priv->kworker_task); goto out_free; } /* Get the MAC address from the chip */ encx24j600_hw_get_macaddr(priv, ndev->dev_addr); ndev->ethtool_ops = &encx24j600_ethtool_ops; ret = register_netdev(ndev); if (unlikely(ret)) { netif_err(priv, probe, ndev, "Error %d initializing card encx24j600 card\n", ret); goto out_free; } netif_info(priv, drv, priv->ndev, "MAC address %pM\n", ndev->dev_addr); return ret; out_free: free_netdev(ndev); error_out: return ret; } static int encx24j600_spi_remove(struct spi_device *spi) { struct encx24j600_priv *priv = dev_get_drvdata(&spi->dev); unregister_netdev(priv->ndev); free_netdev(priv->ndev); return 0; } static const struct spi_device_id encx24j600_spi_id_table = { .name = "encx24j600" }; static struct spi_driver encx24j600_spi_net_driver = { .driver = { .name = DRV_NAME, .owner = THIS_MODULE, .bus = &spi_bus_type, }, .probe = encx24j600_spi_probe, .remove = encx24j600_spi_remove, .id_table = &encx24j600_spi_id_table, }; static int __init encx24j600_init(void) { return spi_register_driver(&encx24j600_spi_net_driver); } module_init(encx24j600_init); void encx24j600_exit(void) { spi_unregister_driver(&encx24j600_spi_net_driver); } module_exit(encx24j600_exit); MODULE_DESCRIPTION(DRV_NAME " ethernet driver"); MODULE_AUTHOR("Jon Ringle "); MODULE_LICENSE("GPL"); MODULE_ALIAS("spi:" DRV_NAME);