diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/encx24j600.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/encx24j600.c | 1124 |
1 files changed, 0 insertions, 1124 deletions
diff --git a/drivers/net/ethernet/microchip/encx24j600.c b/drivers/net/ethernet/microchip/encx24j600.c deleted file mode 100644 index 1da37fddab42..000000000000 --- a/drivers/net/ethernet/microchip/encx24j600.c +++ /dev/null @@ -1,1124 +0,0 @@ -/** - * Microchip ENCX24J600 ethernet driver - * - * Copyright (C) 2015 Gridpoint - * Author: Jon Ringle <jringle@gridpoint.com> - * - * 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 <linux/device.h> -#include <linux/errno.h> -#include <linux/etherdevice.h> -#include <linux/ethtool.h> -#include <linux/interrupt.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/netdevice.h> -#include <linux/regmap.h> -#include <linux/skbuff.h> -#include <linux/spi/spi.h> - -#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 <jringle@gridpoint.com>"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS("spi:" DRV_NAME); |