From: Jeff Kirsher Date: Sun, 24 Jul 2011 23:12:37 +0000 (-0700) Subject: enc28j60: Move the Microchip driver X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=580416e6e4a886512ba692f245a9cb87f75afac7;p=openwrt%2Fstaging%2Fblogic.git enc28j60: Move the Microchip driver Move the Microchip driver into drivers/net/ethernet/microchip/ and make the necessary Kconfig and Makefile changes. CC: Claudio Lanconelli Signed-off-by: Jeff Kirsher --- diff --git a/drivers/net/Kconfig b/drivers/net/Kconfig index 75ca0da52ea2..e83f559a2c46 100644 --- a/drivers/net/Kconfig +++ b/drivers/net/Kconfig @@ -274,23 +274,6 @@ config DM9000_FORCE_SIMPLE_PHY_POLL costly MII PHY reads. Note, this will not work if the chip is operating with an external PHY. -config ENC28J60 - tristate "ENC28J60 support" - depends on EXPERIMENTAL && SPI && NET_ETHERNET - select CRC32 - ---help--- - Support for the Microchip EN28J60 ethernet chip. - - To compile this driver as a module, choose M here. The module will be - called enc28j60. - -config ENC28J60_WRITEVERIFY - bool "Enable write verify" - depends on ENC28J60 - ---help--- - Enable the verify after the buffer write useful for debugging purpose. - If unsure, say N. - config NET_PCI bool "EISA, VLB, PCI and on board controllers" depends on ISA || EISA || PCI diff --git a/drivers/net/Makefile b/drivers/net/Makefile index e2f1f554dd73..08ee56fc607e 100644 --- a/drivers/net/Makefile +++ b/drivers/net/Makefile @@ -53,7 +53,6 @@ obj-$(CONFIG_TUN) += tun.o obj-$(CONFIG_VETH) += veth.o obj-$(CONFIG_NET_NETX) += netx-eth.o obj-$(CONFIG_DM9000) += dm9000.o -obj-$(CONFIG_ENC28J60) += enc28j60.o obj-$(CONFIG_DEV_APPLETALK) += appletalk/ obj-$(CONFIG_ETHERNET) += ethernet/ diff --git a/drivers/net/enc28j60.c b/drivers/net/enc28j60.c deleted file mode 100644 index 2837ce209cd7..000000000000 --- a/drivers/net/enc28j60.c +++ /dev/null @@ -1,1667 +0,0 @@ -/* - * Microchip ENC28J60 ethernet driver (MAC + PHY) - * - * Copyright (C) 2007 Eurek srl - * Author: Claudio Lanconelli - * based on enc28j60.c written by David Anders for 2.4 kernel version - * - * 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. - * - * $Id: enc28j60.c,v 1.22 2007/12/20 10:47:01 claudio Exp $ - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "enc28j60_hw.h" - -#define DRV_NAME "enc28j60" -#define DRV_VERSION "1.01" - -#define SPI_OPLEN 1 - -#define ENC28J60_MSG_DEFAULT \ - (NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK) - -/* Buffer size required for the largest SPI transfer (i.e., reading a - * frame). */ -#define SPI_TRANSFER_BUF_LEN (4 + MAX_FRAMELEN) - -#define TX_TIMEOUT (4 * HZ) - -/* Max TX retries in case of collision as suggested by errata datasheet */ -#define MAX_TX_RETRYCOUNT 16 - -enum { - RXFILTER_NORMAL, - RXFILTER_MULTI, - RXFILTER_PROMISC -}; - -/* Driver local data */ -struct enc28j60_net { - struct net_device *netdev; - struct spi_device *spi; - struct mutex lock; - struct sk_buff *tx_skb; - struct work_struct tx_work; - struct work_struct irq_work; - struct work_struct setrx_work; - struct work_struct restart_work; - u8 bank; /* current register bank selected */ - u16 next_pk_ptr; /* next packet pointer within FIFO */ - u16 max_pk_counter; /* statistics: max packet counter */ - u16 tx_retry_count; - bool hw_enable; - bool full_duplex; - int rxfilter; - u32 msg_enable; - u8 spi_transfer_buf[SPI_TRANSFER_BUF_LEN]; -}; - -/* use ethtool to change the level for any given device */ -static struct { - u32 msg_enable; -} debug = { -1 }; - -/* - * SPI read buffer - * wait for the SPI transfer and copy received data to destination - */ -static int -spi_read_buf(struct enc28j60_net *priv, int len, u8 *data) -{ - u8 *rx_buf = priv->spi_transfer_buf + 4; - u8 *tx_buf = priv->spi_transfer_buf; - struct spi_transfer t = { - .tx_buf = tx_buf, - .rx_buf = rx_buf, - .len = SPI_OPLEN + len, - }; - struct spi_message msg; - int ret; - - tx_buf[0] = ENC28J60_READ_BUF_MEM; - tx_buf[1] = tx_buf[2] = tx_buf[3] = 0; /* don't care */ - - spi_message_init(&msg); - spi_message_add_tail(&t, &msg); - ret = spi_sync(priv->spi, &msg); - if (ret == 0) { - memcpy(data, &rx_buf[SPI_OPLEN], len); - ret = msg.status; - } - if (ret && netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", - __func__, ret); - - return ret; -} - -/* - * SPI write buffer - */ -static int spi_write_buf(struct enc28j60_net *priv, int len, - const u8 *data) -{ - int ret; - - if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0) - ret = -EINVAL; - else { - priv->spi_transfer_buf[0] = ENC28J60_WRITE_BUF_MEM; - memcpy(&priv->spi_transfer_buf[1], data, len); - ret = spi_write(priv->spi, priv->spi_transfer_buf, len + 1); - if (ret && netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", - __func__, ret); - } - return ret; -} - -/* - * basic SPI read operation - */ -static u8 spi_read_op(struct enc28j60_net *priv, u8 op, - u8 addr) -{ - u8 tx_buf[2]; - u8 rx_buf[4]; - u8 val = 0; - int ret; - int slen = SPI_OPLEN; - - /* do dummy read if needed */ - if (addr & SPRD_MASK) - slen++; - - tx_buf[0] = op | (addr & ADDR_MASK); - ret = spi_write_then_read(priv->spi, tx_buf, 1, rx_buf, slen); - if (ret) - printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", - __func__, ret); - else - val = rx_buf[slen - 1]; - - return val; -} - -/* - * basic SPI write operation - */ -static int spi_write_op(struct enc28j60_net *priv, u8 op, - u8 addr, u8 val) -{ - int ret; - - priv->spi_transfer_buf[0] = op | (addr & ADDR_MASK); - priv->spi_transfer_buf[1] = val; - ret = spi_write(priv->spi, priv->spi_transfer_buf, 2); - if (ret && netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", - __func__, ret); - return ret; -} - -static void enc28j60_soft_reset(struct enc28j60_net *priv) -{ - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); - - spi_write_op(priv, ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET); - /* Errata workaround #1, CLKRDY check is unreliable, - * delay at least 1 mS instead */ - udelay(2000); -} - -/* - * select the current register bank if necessary - */ -static void enc28j60_set_bank(struct enc28j60_net *priv, u8 addr) -{ - u8 b = (addr & BANK_MASK) >> 5; - - /* These registers (EIE, EIR, ESTAT, ECON2, ECON1) - * are present in all banks, no need to switch bank - */ - if (addr >= EIE && addr <= ECON1) - return; - - /* Clear or set each bank selection bit as needed */ - if ((b & ECON1_BSEL0) != (priv->bank & ECON1_BSEL0)) { - if (b & ECON1_BSEL0) - spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1, - ECON1_BSEL0); - else - spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1, - ECON1_BSEL0); - } - if ((b & ECON1_BSEL1) != (priv->bank & ECON1_BSEL1)) { - if (b & ECON1_BSEL1) - spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1, - ECON1_BSEL1); - else - spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1, - ECON1_BSEL1); - } - priv->bank = b; -} - -/* - * Register access routines through the SPI bus. - * Every register access comes in two flavours: - * - nolock_xxx: caller needs to invoke mutex_lock, usually to access - * atomically more than one register - * - locked_xxx: caller doesn't need to invoke mutex_lock, single access - * - * Some registers can be accessed through the bit field clear and - * bit field set to avoid a read modify write cycle. - */ - -/* - * Register bit field Set - */ -static void nolock_reg_bfset(struct enc28j60_net *priv, - u8 addr, u8 mask) -{ - enc28j60_set_bank(priv, addr); - spi_write_op(priv, ENC28J60_BIT_FIELD_SET, addr, mask); -} - -static void locked_reg_bfset(struct enc28j60_net *priv, - u8 addr, u8 mask) -{ - mutex_lock(&priv->lock); - nolock_reg_bfset(priv, addr, mask); - mutex_unlock(&priv->lock); -} - -/* - * Register bit field Clear - */ -static void nolock_reg_bfclr(struct enc28j60_net *priv, - u8 addr, u8 mask) -{ - enc28j60_set_bank(priv, addr); - spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, addr, mask); -} - -static void locked_reg_bfclr(struct enc28j60_net *priv, - u8 addr, u8 mask) -{ - mutex_lock(&priv->lock); - nolock_reg_bfclr(priv, addr, mask); - mutex_unlock(&priv->lock); -} - -/* - * Register byte read - */ -static int nolock_regb_read(struct enc28j60_net *priv, - u8 address) -{ - enc28j60_set_bank(priv, address); - return spi_read_op(priv, ENC28J60_READ_CTRL_REG, address); -} - -static int locked_regb_read(struct enc28j60_net *priv, - u8 address) -{ - int ret; - - mutex_lock(&priv->lock); - ret = nolock_regb_read(priv, address); - mutex_unlock(&priv->lock); - - return ret; -} - -/* - * Register word read - */ -static int nolock_regw_read(struct enc28j60_net *priv, - u8 address) -{ - int rl, rh; - - enc28j60_set_bank(priv, address); - rl = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address); - rh = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address + 1); - - return (rh << 8) | rl; -} - -static int locked_regw_read(struct enc28j60_net *priv, - u8 address) -{ - int ret; - - mutex_lock(&priv->lock); - ret = nolock_regw_read(priv, address); - mutex_unlock(&priv->lock); - - return ret; -} - -/* - * Register byte write - */ -static void nolock_regb_write(struct enc28j60_net *priv, - u8 address, u8 data) -{ - enc28j60_set_bank(priv, address); - spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, data); -} - -static void locked_regb_write(struct enc28j60_net *priv, - u8 address, u8 data) -{ - mutex_lock(&priv->lock); - nolock_regb_write(priv, address, data); - mutex_unlock(&priv->lock); -} - -/* - * Register word write - */ -static void nolock_regw_write(struct enc28j60_net *priv, - u8 address, u16 data) -{ - enc28j60_set_bank(priv, address); - spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, (u8) data); - spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address + 1, - (u8) (data >> 8)); -} - -static void locked_regw_write(struct enc28j60_net *priv, - u8 address, u16 data) -{ - mutex_lock(&priv->lock); - nolock_regw_write(priv, address, data); - mutex_unlock(&priv->lock); -} - -/* - * Buffer memory read - * Select the starting address and execute a SPI buffer read - */ -static void enc28j60_mem_read(struct enc28j60_net *priv, - u16 addr, int len, u8 *data) -{ - mutex_lock(&priv->lock); - nolock_regw_write(priv, ERDPTL, addr); -#ifdef CONFIG_ENC28J60_WRITEVERIFY - if (netif_msg_drv(priv)) { - u16 reg; - reg = nolock_regw_read(priv, ERDPTL); - if (reg != addr) - printk(KERN_DEBUG DRV_NAME ": %s() error writing ERDPT " - "(0x%04x - 0x%04x)\n", __func__, reg, addr); - } -#endif - spi_read_buf(priv, len, data); - mutex_unlock(&priv->lock); -} - -/* - * Write packet to enc28j60 TX buffer memory - */ -static void -enc28j60_packet_write(struct enc28j60_net *priv, int len, const u8 *data) -{ - mutex_lock(&priv->lock); - /* Set the write pointer to start of transmit buffer area */ - nolock_regw_write(priv, EWRPTL, TXSTART_INIT); -#ifdef CONFIG_ENC28J60_WRITEVERIFY - if (netif_msg_drv(priv)) { - u16 reg; - reg = nolock_regw_read(priv, EWRPTL); - if (reg != TXSTART_INIT) - printk(KERN_DEBUG DRV_NAME - ": %s() ERWPT:0x%04x != 0x%04x\n", - __func__, reg, TXSTART_INIT); - } -#endif - /* Set the TXND pointer to correspond to the packet size given */ - nolock_regw_write(priv, ETXNDL, TXSTART_INIT + len); - /* write per-packet control byte */ - spi_write_op(priv, ENC28J60_WRITE_BUF_MEM, 0, 0x00); - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME - ": %s() after control byte ERWPT:0x%04x\n", - __func__, nolock_regw_read(priv, EWRPTL)); - /* copy the packet into the transmit buffer */ - spi_write_buf(priv, len, data); - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME - ": %s() after write packet ERWPT:0x%04x, len=%d\n", - __func__, nolock_regw_read(priv, EWRPTL), len); - mutex_unlock(&priv->lock); -} - -static unsigned long msec20_to_jiffies; - -static int poll_ready(struct enc28j60_net *priv, u8 reg, u8 mask, u8 val) -{ - unsigned long timeout = jiffies + msec20_to_jiffies; - - /* 20 msec timeout read */ - while ((nolock_regb_read(priv, reg) & mask) != val) { - if (time_after(jiffies, timeout)) { - if (netif_msg_drv(priv)) - dev_dbg(&priv->spi->dev, - "reg %02x ready timeout!\n", reg); - return -ETIMEDOUT; - } - cpu_relax(); - } - return 0; -} - -/* - * Wait until the PHY operation is complete. - */ -static int wait_phy_ready(struct enc28j60_net *priv) -{ - return poll_ready(priv, MISTAT, MISTAT_BUSY, 0) ? 0 : 1; -} - -/* - * PHY register read - * PHY registers are not accessed directly, but through the MII - */ -static u16 enc28j60_phy_read(struct enc28j60_net *priv, u8 address) -{ - u16 ret; - - mutex_lock(&priv->lock); - /* set the PHY register address */ - nolock_regb_write(priv, MIREGADR, address); - /* start the register read operation */ - nolock_regb_write(priv, MICMD, MICMD_MIIRD); - /* wait until the PHY read completes */ - wait_phy_ready(priv); - /* quit reading */ - nolock_regb_write(priv, MICMD, 0x00); - /* return the data */ - ret = nolock_regw_read(priv, MIRDL); - mutex_unlock(&priv->lock); - - return ret; -} - -static int enc28j60_phy_write(struct enc28j60_net *priv, u8 address, u16 data) -{ - int ret; - - mutex_lock(&priv->lock); - /* set the PHY register address */ - nolock_regb_write(priv, MIREGADR, address); - /* write the PHY data */ - nolock_regw_write(priv, MIWRL, data); - /* wait until the PHY write completes and return */ - ret = wait_phy_ready(priv); - mutex_unlock(&priv->lock); - - return ret; -} - -/* - * Program the hardware MAC address from dev->dev_addr. - */ -static int enc28j60_set_hw_macaddr(struct net_device *ndev) -{ - int ret; - struct enc28j60_net *priv = netdev_priv(ndev); - - mutex_lock(&priv->lock); - if (!priv->hw_enable) { - if (netif_msg_drv(priv)) - printk(KERN_INFO DRV_NAME - ": %s: Setting MAC address to %pM\n", - ndev->name, ndev->dev_addr); - /* NOTE: MAC address in ENC28J60 is byte-backward */ - nolock_regb_write(priv, MAADR5, ndev->dev_addr[0]); - nolock_regb_write(priv, MAADR4, ndev->dev_addr[1]); - nolock_regb_write(priv, MAADR3, ndev->dev_addr[2]); - nolock_regb_write(priv, MAADR2, ndev->dev_addr[3]); - nolock_regb_write(priv, MAADR1, ndev->dev_addr[4]); - nolock_regb_write(priv, MAADR0, ndev->dev_addr[5]); - ret = 0; - } else { - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME - ": %s() Hardware must be disabled to set " - "Mac address\n", __func__); - ret = -EBUSY; - } - mutex_unlock(&priv->lock); - return ret; -} - -/* - * Store the new hardware address in dev->dev_addr, and update the MAC. - */ -static int enc28j60_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 enc28j60_set_hw_macaddr(dev); -} - -/* - * Debug routine to dump useful register contents - */ -static void enc28j60_dump_regs(struct enc28j60_net *priv, const char *msg) -{ - mutex_lock(&priv->lock); - printk(KERN_DEBUG DRV_NAME " %s\n" - "HwRevID: 0x%02x\n" - "Cntrl: ECON1 ECON2 ESTAT EIR EIE\n" - " 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n" - "MAC : MACON1 MACON3 MACON4\n" - " 0x%02x 0x%02x 0x%02x\n" - "Rx : ERXST ERXND ERXWRPT ERXRDPT ERXFCON EPKTCNT MAMXFL\n" - " 0x%04x 0x%04x 0x%04x 0x%04x " - "0x%02x 0x%02x 0x%04x\n" - "Tx : ETXST ETXND MACLCON1 MACLCON2 MAPHSUP\n" - " 0x%04x 0x%04x 0x%02x 0x%02x 0x%02x\n", - msg, nolock_regb_read(priv, EREVID), - nolock_regb_read(priv, ECON1), nolock_regb_read(priv, ECON2), - nolock_regb_read(priv, ESTAT), nolock_regb_read(priv, EIR), - nolock_regb_read(priv, EIE), nolock_regb_read(priv, MACON1), - nolock_regb_read(priv, MACON3), nolock_regb_read(priv, MACON4), - nolock_regw_read(priv, ERXSTL), nolock_regw_read(priv, ERXNDL), - nolock_regw_read(priv, ERXWRPTL), - nolock_regw_read(priv, ERXRDPTL), - nolock_regb_read(priv, ERXFCON), - nolock_regb_read(priv, EPKTCNT), - nolock_regw_read(priv, MAMXFLL), nolock_regw_read(priv, ETXSTL), - nolock_regw_read(priv, ETXNDL), - nolock_regb_read(priv, MACLCON1), - nolock_regb_read(priv, MACLCON2), - nolock_regb_read(priv, MAPHSUP)); - mutex_unlock(&priv->lock); -} - -/* - * ERXRDPT need to be set always at odd addresses, refer to errata datasheet - */ -static u16 erxrdpt_workaround(u16 next_packet_ptr, u16 start, u16 end) -{ - u16 erxrdpt; - - if ((next_packet_ptr - 1 < start) || (next_packet_ptr - 1 > end)) - erxrdpt = end; - else - erxrdpt = next_packet_ptr - 1; - - return erxrdpt; -} - -/* - * Calculate wrap around when reading beyond the end of the RX buffer - */ -static u16 rx_packet_start(u16 ptr) -{ - if (ptr + RSV_SIZE > RXEND_INIT) - return (ptr + RSV_SIZE) - (RXEND_INIT - RXSTART_INIT + 1); - else - return ptr + RSV_SIZE; -} - -static void nolock_rxfifo_init(struct enc28j60_net *priv, u16 start, u16 end) -{ - u16 erxrdpt; - - if (start > 0x1FFF || end > 0x1FFF || start > end) { - if (netif_msg_drv(priv)) - printk(KERN_ERR DRV_NAME ": %s(%d, %d) RXFIFO " - "bad parameters!\n", __func__, start, end); - return; - } - /* set receive buffer start + end */ - priv->next_pk_ptr = start; - nolock_regw_write(priv, ERXSTL, start); - erxrdpt = erxrdpt_workaround(priv->next_pk_ptr, start, end); - nolock_regw_write(priv, ERXRDPTL, erxrdpt); - nolock_regw_write(priv, ERXNDL, end); -} - -static void nolock_txfifo_init(struct enc28j60_net *priv, u16 start, u16 end) -{ - if (start > 0x1FFF || end > 0x1FFF || start > end) { - if (netif_msg_drv(priv)) - printk(KERN_ERR DRV_NAME ": %s(%d, %d) TXFIFO " - "bad parameters!\n", __func__, start, end); - return; - } - /* set transmit buffer start + end */ - nolock_regw_write(priv, ETXSTL, start); - nolock_regw_write(priv, ETXNDL, end); -} - -/* - * Low power mode shrinks power consumption about 100x, so we'd like - * the chip to be in that mode whenever it's inactive. (However, we - * can't stay in lowpower mode during suspend with WOL active.) - */ -static void enc28j60_lowpower(struct enc28j60_net *priv, bool is_low) -{ - if (netif_msg_drv(priv)) - dev_dbg(&priv->spi->dev, "%s power...\n", - is_low ? "low" : "high"); - - mutex_lock(&priv->lock); - if (is_low) { - nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); - poll_ready(priv, ESTAT, ESTAT_RXBUSY, 0); - poll_ready(priv, ECON1, ECON1_TXRTS, 0); - /* ECON2_VRPS was set during initialization */ - nolock_reg_bfset(priv, ECON2, ECON2_PWRSV); - } else { - nolock_reg_bfclr(priv, ECON2, ECON2_PWRSV); - poll_ready(priv, ESTAT, ESTAT_CLKRDY, ESTAT_CLKRDY); - /* caller sets ECON1_RXEN */ - } - mutex_unlock(&priv->lock); -} - -static int enc28j60_hw_init(struct enc28j60_net *priv) -{ - u8 reg; - - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() - %s\n", __func__, - priv->full_duplex ? "FullDuplex" : "HalfDuplex"); - - mutex_lock(&priv->lock); - /* first reset the chip */ - enc28j60_soft_reset(priv); - /* Clear ECON1 */ - spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, ECON1, 0x00); - priv->bank = 0; - priv->hw_enable = false; - priv->tx_retry_count = 0; - priv->max_pk_counter = 0; - priv->rxfilter = RXFILTER_NORMAL; - /* enable address auto increment and voltage regulator powersave */ - nolock_regb_write(priv, ECON2, ECON2_AUTOINC | ECON2_VRPS); - - nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT); - nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT); - mutex_unlock(&priv->lock); - - /* - * Check the RevID. - * If it's 0x00 or 0xFF probably the enc28j60 is not mounted or - * damaged - */ - reg = locked_regb_read(priv, EREVID); - if (netif_msg_drv(priv)) - printk(KERN_INFO DRV_NAME ": chip RevID: 0x%02x\n", reg); - if (reg == 0x00 || reg == 0xff) { - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() Invalid RevId %d\n", - __func__, reg); - return 0; - } - - /* default filter mode: (unicast OR broadcast) AND crc valid */ - locked_regb_write(priv, ERXFCON, - ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_BCEN); - - /* enable MAC receive */ - locked_regb_write(priv, MACON1, - MACON1_MARXEN | MACON1_TXPAUS | MACON1_RXPAUS); - /* enable automatic padding and CRC operations */ - if (priv->full_duplex) { - locked_regb_write(priv, MACON3, - MACON3_PADCFG0 | MACON3_TXCRCEN | - MACON3_FRMLNEN | MACON3_FULDPX); - /* set inter-frame gap (non-back-to-back) */ - locked_regb_write(priv, MAIPGL, 0x12); - /* set inter-frame gap (back-to-back) */ - locked_regb_write(priv, MABBIPG, 0x15); - } else { - locked_regb_write(priv, MACON3, - MACON3_PADCFG0 | MACON3_TXCRCEN | - MACON3_FRMLNEN); - locked_regb_write(priv, MACON4, 1 << 6); /* DEFER bit */ - /* set inter-frame gap (non-back-to-back) */ - locked_regw_write(priv, MAIPGL, 0x0C12); - /* set inter-frame gap (back-to-back) */ - locked_regb_write(priv, MABBIPG, 0x12); - } - /* - * MACLCON1 (default) - * MACLCON2 (default) - * Set the maximum packet size which the controller will accept - */ - locked_regw_write(priv, MAMXFLL, MAX_FRAMELEN); - - /* Configure LEDs */ - if (!enc28j60_phy_write(priv, PHLCON, ENC28J60_LAMPS_MODE)) - return 0; - - if (priv->full_duplex) { - if (!enc28j60_phy_write(priv, PHCON1, PHCON1_PDPXMD)) - return 0; - if (!enc28j60_phy_write(priv, PHCON2, 0x00)) - return 0; - } else { - if (!enc28j60_phy_write(priv, PHCON1, 0x00)) - return 0; - if (!enc28j60_phy_write(priv, PHCON2, PHCON2_HDLDIS)) - return 0; - } - if (netif_msg_hw(priv)) - enc28j60_dump_regs(priv, "Hw initialized."); - - return 1; -} - -static void enc28j60_hw_enable(struct enc28j60_net *priv) -{ - /* enable interrupts */ - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enabling interrupts.\n", - __func__); - - enc28j60_phy_write(priv, PHIE, PHIE_PGEIE | PHIE_PLNKIE); - - mutex_lock(&priv->lock); - nolock_reg_bfclr(priv, EIR, EIR_DMAIF | EIR_LINKIF | - EIR_TXIF | EIR_TXERIF | EIR_RXERIF | EIR_PKTIF); - nolock_regb_write(priv, EIE, EIE_INTIE | EIE_PKTIE | EIE_LINKIE | - EIE_TXIE | EIE_TXERIE | EIE_RXERIE); - - /* enable receive logic */ - nolock_reg_bfset(priv, ECON1, ECON1_RXEN); - priv->hw_enable = true; - mutex_unlock(&priv->lock); -} - -static void enc28j60_hw_disable(struct enc28j60_net *priv) -{ - mutex_lock(&priv->lock); - /* disable interrutps and packet reception */ - nolock_regb_write(priv, EIE, 0x00); - nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); - priv->hw_enable = false; - mutex_unlock(&priv->lock); -} - -static int -enc28j60_setlink(struct net_device *ndev, u8 autoneg, u16 speed, u8 duplex) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - int ret = 0; - - if (!priv->hw_enable) { - /* link is in low power mode now; duplex setting - * will take effect on next enc28j60_hw_init(). - */ - if (autoneg == AUTONEG_DISABLE && speed == SPEED_10) - priv->full_duplex = (duplex == DUPLEX_FULL); - else { - if (netif_msg_link(priv)) - dev_warn(&ndev->dev, - "unsupported link setting\n"); - ret = -EOPNOTSUPP; - } - } else { - if (netif_msg_link(priv)) - dev_warn(&ndev->dev, "Warning: hw must be disabled " - "to set link mode\n"); - ret = -EBUSY; - } - return ret; -} - -/* - * Read the Transmit Status Vector - */ -static void enc28j60_read_tsv(struct enc28j60_net *priv, u8 tsv[TSV_SIZE]) -{ - int endptr; - - endptr = locked_regw_read(priv, ETXNDL); - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME ": reading TSV at addr:0x%04x\n", - endptr + 1); - enc28j60_mem_read(priv, endptr + 1, TSV_SIZE, tsv); -} - -static void enc28j60_dump_tsv(struct enc28j60_net *priv, const char *msg, - u8 tsv[TSV_SIZE]) -{ - u16 tmp1, tmp2; - - printk(KERN_DEBUG DRV_NAME ": %s - TSV:\n", msg); - tmp1 = tsv[1]; - tmp1 <<= 8; - tmp1 |= tsv[0]; - - tmp2 = tsv[5]; - tmp2 <<= 8; - tmp2 |= tsv[4]; - - printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, CollisionCount: %d," - " TotByteOnWire: %d\n", tmp1, tsv[2] & 0x0f, tmp2); - printk(KERN_DEBUG DRV_NAME ": TxDone: %d, CRCErr:%d, LenChkErr: %d," - " LenOutOfRange: %d\n", TSV_GETBIT(tsv, TSV_TXDONE), - TSV_GETBIT(tsv, TSV_TXCRCERROR), - TSV_GETBIT(tsv, TSV_TXLENCHKERROR), - TSV_GETBIT(tsv, TSV_TXLENOUTOFRANGE)); - printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, " - "PacketDefer: %d, ExDefer: %d\n", - TSV_GETBIT(tsv, TSV_TXMULTICAST), - TSV_GETBIT(tsv, TSV_TXBROADCAST), - TSV_GETBIT(tsv, TSV_TXPACKETDEFER), - TSV_GETBIT(tsv, TSV_TXEXDEFER)); - printk(KERN_DEBUG DRV_NAME ": ExCollision: %d, LateCollision: %d, " - "Giant: %d, Underrun: %d\n", - TSV_GETBIT(tsv, TSV_TXEXCOLLISION), - TSV_GETBIT(tsv, TSV_TXLATECOLLISION), - TSV_GETBIT(tsv, TSV_TXGIANT), TSV_GETBIT(tsv, TSV_TXUNDERRUN)); - printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d, " - "BackPressApp: %d, VLanTagFrame: %d\n", - TSV_GETBIT(tsv, TSV_TXCONTROLFRAME), - TSV_GETBIT(tsv, TSV_TXPAUSEFRAME), - TSV_GETBIT(tsv, TSV_BACKPRESSUREAPP), - TSV_GETBIT(tsv, TSV_TXVLANTAGFRAME)); -} - -/* - * Receive Status vector - */ -static void enc28j60_dump_rsv(struct enc28j60_net *priv, const char *msg, - u16 pk_ptr, int len, u16 sts) -{ - printk(KERN_DEBUG DRV_NAME ": %s - NextPk: 0x%04x - RSV:\n", - msg, pk_ptr); - printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, DribbleNibble: %d\n", len, - RSV_GETBIT(sts, RSV_DRIBBLENIBBLE)); - printk(KERN_DEBUG DRV_NAME ": RxOK: %d, CRCErr:%d, LenChkErr: %d," - " LenOutOfRange: %d\n", RSV_GETBIT(sts, RSV_RXOK), - RSV_GETBIT(sts, RSV_CRCERROR), - RSV_GETBIT(sts, RSV_LENCHECKERR), - RSV_GETBIT(sts, RSV_LENOUTOFRANGE)); - printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, " - "LongDropEvent: %d, CarrierEvent: %d\n", - RSV_GETBIT(sts, RSV_RXMULTICAST), - RSV_GETBIT(sts, RSV_RXBROADCAST), - RSV_GETBIT(sts, RSV_RXLONGEVDROPEV), - RSV_GETBIT(sts, RSV_CARRIEREV)); - printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d," - " UnknownOp: %d, VLanTagFrame: %d\n", - RSV_GETBIT(sts, RSV_RXCONTROLFRAME), - RSV_GETBIT(sts, RSV_RXPAUSEFRAME), - RSV_GETBIT(sts, RSV_RXUNKNOWNOPCODE), - RSV_GETBIT(sts, RSV_RXTYPEVLAN)); -} - -static void dump_packet(const char *msg, int len, const char *data) -{ - printk(KERN_DEBUG DRV_NAME ": %s - packet len:%d\n", msg, len); - print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1, - data, len, true); -} - -/* - * Hardware receive function. - * Read the buffer memory, update the FIFO pointer to free the buffer, - * check the status vector and decrement the packet counter. - */ -static void enc28j60_hw_rx(struct net_device *ndev) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - struct sk_buff *skb = NULL; - u16 erxrdpt, next_packet, rxstat; - u8 rsv[RSV_SIZE]; - int len; - - if (netif_msg_rx_status(priv)) - printk(KERN_DEBUG DRV_NAME ": RX pk_addr:0x%04x\n", - priv->next_pk_ptr); - - if (unlikely(priv->next_pk_ptr > RXEND_INIT)) { - if (netif_msg_rx_err(priv)) - dev_err(&ndev->dev, - "%s() Invalid packet address!! 0x%04x\n", - __func__, priv->next_pk_ptr); - /* packet address corrupted: reset RX logic */ - mutex_lock(&priv->lock); - nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); - nolock_reg_bfset(priv, ECON1, ECON1_RXRST); - nolock_reg_bfclr(priv, ECON1, ECON1_RXRST); - nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT); - nolock_reg_bfclr(priv, EIR, EIR_RXERIF); - nolock_reg_bfset(priv, ECON1, ECON1_RXEN); - mutex_unlock(&priv->lock); - ndev->stats.rx_errors++; - return; - } - /* Read next packet pointer and rx status vector */ - enc28j60_mem_read(priv, priv->next_pk_ptr, sizeof(rsv), rsv); - - next_packet = rsv[1]; - next_packet <<= 8; - next_packet |= rsv[0]; - - len = rsv[3]; - len <<= 8; - len |= rsv[2]; - - rxstat = rsv[5]; - rxstat <<= 8; - rxstat |= rsv[4]; - - if (netif_msg_rx_status(priv)) - enc28j60_dump_rsv(priv, __func__, next_packet, len, rxstat); - - if (!RSV_GETBIT(rxstat, RSV_RXOK) || len > MAX_FRAMELEN) { - if (netif_msg_rx_err(priv)) - dev_err(&ndev->dev, "Rx Error (%04x)\n", rxstat); - ndev->stats.rx_errors++; - if (RSV_GETBIT(rxstat, RSV_CRCERROR)) - ndev->stats.rx_crc_errors++; - if (RSV_GETBIT(rxstat, RSV_LENCHECKERR)) - ndev->stats.rx_frame_errors++; - if (len > MAX_FRAMELEN) - ndev->stats.rx_over_errors++; - } else { - skb = dev_alloc_skb(len + NET_IP_ALIGN); - if (!skb) { - if (netif_msg_rx_err(priv)) - dev_err(&ndev->dev, - "out of memory for Rx'd frame\n"); - ndev->stats.rx_dropped++; - } else { - skb->dev = ndev; - skb_reserve(skb, NET_IP_ALIGN); - /* copy the packet from the receive buffer */ - enc28j60_mem_read(priv, - rx_packet_start(priv->next_pk_ptr), - len, skb_put(skb, len)); - if (netif_msg_pktdata(priv)) - dump_packet(__func__, skb->len, skb->data); - skb->protocol = eth_type_trans(skb, ndev); - /* update statistics */ - ndev->stats.rx_packets++; - ndev->stats.rx_bytes += len; - netif_rx_ni(skb); - } - } - /* - * Move the RX read pointer to the start of the next - * received packet. - * This frees the memory we just read out - */ - erxrdpt = erxrdpt_workaround(next_packet, RXSTART_INIT, RXEND_INIT); - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT:0x%04x\n", - __func__, erxrdpt); - - mutex_lock(&priv->lock); - nolock_regw_write(priv, ERXRDPTL, erxrdpt); -#ifdef CONFIG_ENC28J60_WRITEVERIFY - if (netif_msg_drv(priv)) { - u16 reg; - reg = nolock_regw_read(priv, ERXRDPTL); - if (reg != erxrdpt) - printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT verify " - "error (0x%04x - 0x%04x)\n", __func__, - reg, erxrdpt); - } -#endif - priv->next_pk_ptr = next_packet; - /* we are done with this packet, decrement the packet counter */ - nolock_reg_bfset(priv, ECON2, ECON2_PKTDEC); - mutex_unlock(&priv->lock); -} - -/* - * Calculate free space in RxFIFO - */ -static int enc28j60_get_free_rxfifo(struct enc28j60_net *priv) -{ - int epkcnt, erxst, erxnd, erxwr, erxrd; - int free_space; - - mutex_lock(&priv->lock); - epkcnt = nolock_regb_read(priv, EPKTCNT); - if (epkcnt >= 255) - free_space = -1; - else { - erxst = nolock_regw_read(priv, ERXSTL); - erxnd = nolock_regw_read(priv, ERXNDL); - erxwr = nolock_regw_read(priv, ERXWRPTL); - erxrd = nolock_regw_read(priv, ERXRDPTL); - - if (erxwr > erxrd) - free_space = (erxnd - erxst) - (erxwr - erxrd); - else if (erxwr == erxrd) - free_space = (erxnd - erxst); - else - free_space = erxrd - erxwr - 1; - } - mutex_unlock(&priv->lock); - if (netif_msg_rx_status(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() free_space = %d\n", - __func__, free_space); - return free_space; -} - -/* - * Access the PHY to determine link status - */ -static void enc28j60_check_link_status(struct net_device *ndev) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - u16 reg; - int duplex; - - reg = enc28j60_phy_read(priv, PHSTAT2); - if (netif_msg_hw(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() PHSTAT1: %04x, " - "PHSTAT2: %04x\n", __func__, - enc28j60_phy_read(priv, PHSTAT1), reg); - duplex = reg & PHSTAT2_DPXSTAT; - - if (reg & PHSTAT2_LSTAT) { - netif_carrier_on(ndev); - if (netif_msg_ifup(priv)) - dev_info(&ndev->dev, "link up - %s\n", - duplex ? "Full duplex" : "Half duplex"); - } else { - if (netif_msg_ifdown(priv)) - dev_info(&ndev->dev, "link down\n"); - netif_carrier_off(ndev); - } -} - -static void enc28j60_tx_clear(struct net_device *ndev, bool err) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - - if (err) - ndev->stats.tx_errors++; - else - ndev->stats.tx_packets++; - - if (priv->tx_skb) { - if (!err) - ndev->stats.tx_bytes += priv->tx_skb->len; - dev_kfree_skb(priv->tx_skb); - priv->tx_skb = NULL; - } - locked_reg_bfclr(priv, ECON1, ECON1_TXRTS); - netif_wake_queue(ndev); -} - -/* - * RX handler - * ignore PKTIF because is unreliable! (look at the errata datasheet) - * check EPKTCNT is the suggested workaround. - * We don't need to clear interrupt flag, automatically done when - * enc28j60_hw_rx() decrements the packet counter. - * Returns how many packet processed. - */ -static int enc28j60_rx_interrupt(struct net_device *ndev) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - int pk_counter, ret; - - pk_counter = locked_regb_read(priv, EPKTCNT); - if (pk_counter && netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME ": intRX, pk_cnt: %d\n", pk_counter); - if (pk_counter > priv->max_pk_counter) { - /* update statistics */ - priv->max_pk_counter = pk_counter; - if (netif_msg_rx_status(priv) && priv->max_pk_counter > 1) - printk(KERN_DEBUG DRV_NAME ": RX max_pk_cnt: %d\n", - priv->max_pk_counter); - } - ret = pk_counter; - while (pk_counter-- > 0) - enc28j60_hw_rx(ndev); - - return ret; -} - -static void enc28j60_irq_work_handler(struct work_struct *work) -{ - struct enc28j60_net *priv = - container_of(work, struct enc28j60_net, irq_work); - struct net_device *ndev = priv->netdev; - int intflags, loop; - - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); - /* disable further interrupts */ - locked_reg_bfclr(priv, EIE, EIE_INTIE); - - do { - loop = 0; - intflags = locked_regb_read(priv, EIR); - /* DMA interrupt handler (not currently used) */ - if ((intflags & EIR_DMAIF) != 0) { - loop++; - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME - ": intDMA(%d)\n", loop); - locked_reg_bfclr(priv, EIR, EIR_DMAIF); - } - /* LINK changed handler */ - if ((intflags & EIR_LINKIF) != 0) { - loop++; - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME - ": intLINK(%d)\n", loop); - enc28j60_check_link_status(ndev); - /* read PHIR to clear the flag */ - enc28j60_phy_read(priv, PHIR); - } - /* TX complete handler */ - if ((intflags & EIR_TXIF) != 0) { - bool err = false; - loop++; - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME - ": intTX(%d)\n", loop); - priv->tx_retry_count = 0; - if (locked_regb_read(priv, ESTAT) & ESTAT_TXABRT) { - if (netif_msg_tx_err(priv)) - dev_err(&ndev->dev, - "Tx Error (aborted)\n"); - err = true; - } - if (netif_msg_tx_done(priv)) { - u8 tsv[TSV_SIZE]; - enc28j60_read_tsv(priv, tsv); - enc28j60_dump_tsv(priv, "Tx Done", tsv); - } - enc28j60_tx_clear(ndev, err); - locked_reg_bfclr(priv, EIR, EIR_TXIF); - } - /* TX Error handler */ - if ((intflags & EIR_TXERIF) != 0) { - u8 tsv[TSV_SIZE]; - - loop++; - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME - ": intTXErr(%d)\n", loop); - locked_reg_bfclr(priv, ECON1, ECON1_TXRTS); - enc28j60_read_tsv(priv, tsv); - if (netif_msg_tx_err(priv)) - enc28j60_dump_tsv(priv, "Tx Error", tsv); - /* Reset TX logic */ - mutex_lock(&priv->lock); - nolock_reg_bfset(priv, ECON1, ECON1_TXRST); - nolock_reg_bfclr(priv, ECON1, ECON1_TXRST); - nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT); - mutex_unlock(&priv->lock); - /* Transmit Late collision check for retransmit */ - if (TSV_GETBIT(tsv, TSV_TXLATECOLLISION)) { - if (netif_msg_tx_err(priv)) - printk(KERN_DEBUG DRV_NAME - ": LateCollision TXErr (%d)\n", - priv->tx_retry_count); - if (priv->tx_retry_count++ < MAX_TX_RETRYCOUNT) - locked_reg_bfset(priv, ECON1, - ECON1_TXRTS); - else - enc28j60_tx_clear(ndev, true); - } else - enc28j60_tx_clear(ndev, true); - locked_reg_bfclr(priv, EIR, EIR_TXERIF); - } - /* RX Error handler */ - if ((intflags & EIR_RXERIF) != 0) { - loop++; - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME - ": intRXErr(%d)\n", loop); - /* Check free FIFO space to flag RX overrun */ - if (enc28j60_get_free_rxfifo(priv) <= 0) { - if (netif_msg_rx_err(priv)) - printk(KERN_DEBUG DRV_NAME - ": RX Overrun\n"); - ndev->stats.rx_dropped++; - } - locked_reg_bfclr(priv, EIR, EIR_RXERIF); - } - /* RX handler */ - if (enc28j60_rx_interrupt(ndev)) - loop++; - } while (loop); - - /* re-enable interrupts */ - locked_reg_bfset(priv, EIE, EIE_INTIE); - if (netif_msg_intr(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() exit\n", __func__); -} - -/* - * Hardware transmit function. - * Fill the buffer memory and send the contents of the transmit buffer - * onto the network - */ -static void enc28j60_hw_tx(struct enc28j60_net *priv) -{ - if (netif_msg_tx_queued(priv)) - printk(KERN_DEBUG DRV_NAME - ": Tx Packet Len:%d\n", priv->tx_skb->len); - - if (netif_msg_pktdata(priv)) - dump_packet(__func__, - priv->tx_skb->len, priv->tx_skb->data); - enc28j60_packet_write(priv, priv->tx_skb->len, priv->tx_skb->data); - -#ifdef CONFIG_ENC28J60_WRITEVERIFY - /* readback and verify written data */ - if (netif_msg_drv(priv)) { - int test_len, k; - u8 test_buf[64]; /* limit the test to the first 64 bytes */ - int okflag; - - test_len = priv->tx_skb->len; - if (test_len > sizeof(test_buf)) - test_len = sizeof(test_buf); - - /* + 1 to skip control byte */ - enc28j60_mem_read(priv, TXSTART_INIT + 1, test_len, test_buf); - okflag = 1; - for (k = 0; k < test_len; k++) { - if (priv->tx_skb->data[k] != test_buf[k]) { - printk(KERN_DEBUG DRV_NAME - ": Error, %d location differ: " - "0x%02x-0x%02x\n", k, - priv->tx_skb->data[k], test_buf[k]); - okflag = 0; - } - } - if (!okflag) - printk(KERN_DEBUG DRV_NAME ": Tx write buffer, " - "verify ERROR!\n"); - } -#endif - /* set TX request flag */ - locked_reg_bfset(priv, ECON1, ECON1_TXRTS); -} - -static netdev_tx_t enc28j60_send_packet(struct sk_buff *skb, - struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - - if (netif_msg_tx_queued(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); - - /* If some error occurs while trying to transmit this - * packet, you should return '1' from this function. - * In such a case you _may not_ do anything to the - * SKB, it is still owned by the network queueing - * layer when an error is returned. This means you - * may not modify any SKB fields, you may not free - * the SKB, etc. - */ - netif_stop_queue(dev); - - /* Remember the skb for deferred processing */ - priv->tx_skb = skb; - schedule_work(&priv->tx_work); - - return NETDEV_TX_OK; -} - -static void enc28j60_tx_work_handler(struct work_struct *work) -{ - struct enc28j60_net *priv = - container_of(work, struct enc28j60_net, tx_work); - - /* actual delivery of data */ - enc28j60_hw_tx(priv); -} - -static irqreturn_t enc28j60_irq(int irq, void *dev_id) -{ - struct enc28j60_net *priv = dev_id; - - /* - * Can't do anything in interrupt context because we need to - * block (spi_sync() is blocking) so fire of the interrupt - * handling workqueue. - * Remember that we access enc28j60 registers through SPI bus - * via spi_sync() call. - */ - schedule_work(&priv->irq_work); - - return IRQ_HANDLED; -} - -static void enc28j60_tx_timeout(struct net_device *ndev) -{ - struct enc28j60_net *priv = netdev_priv(ndev); - - if (netif_msg_timer(priv)) - dev_err(&ndev->dev, DRV_NAME " tx timeout\n"); - - ndev->stats.tx_errors++; - /* can't restart safely under softirq */ - schedule_work(&priv->restart_work); -} - -/* - * Open/initialize the board. This is called (in the current kernel) - * sometime after booting when the 'ifconfig' program is run. - * - * This routine should set everything up anew at each open, even - * registers that "should" only need to be set once at boot, so that - * there is non-reboot way to recover if something goes wrong. - */ -static int enc28j60_net_open(struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); - - if (!is_valid_ether_addr(dev->dev_addr)) { - if (netif_msg_ifup(priv)) - dev_err(&dev->dev, "invalid MAC address %pM\n", - dev->dev_addr); - return -EADDRNOTAVAIL; - } - /* Reset the hardware here (and take it out of low power mode) */ - enc28j60_lowpower(priv, false); - enc28j60_hw_disable(priv); - if (!enc28j60_hw_init(priv)) { - if (netif_msg_ifup(priv)) - dev_err(&dev->dev, "hw_reset() failed\n"); - return -EINVAL; - } - /* Update the MAC address (in case user has changed it) */ - enc28j60_set_hw_macaddr(dev); - /* Enable interrupts */ - enc28j60_hw_enable(priv); - /* check link status */ - enc28j60_check_link_status(dev); - /* We are now ready to accept transmit requests from - * the queueing layer of the networking. - */ - netif_start_queue(dev); - - return 0; -} - -/* The inverse routine to net_open(). */ -static int enc28j60_net_close(struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); - - enc28j60_hw_disable(priv); - enc28j60_lowpower(priv, true); - netif_stop_queue(dev); - - return 0; -} - -/* - * Set or clear the multicast filter for this adapter - * num_addrs == -1 Promiscuous mode, receive all packets - * num_addrs == 0 Normal mode, filter out multicast packets - * num_addrs > 0 Multicast mode, receive normal and MC packets - */ -static void enc28j60_set_multicast_list(struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - int oldfilter = priv->rxfilter; - - if (dev->flags & IFF_PROMISC) { - if (netif_msg_link(priv)) - dev_info(&dev->dev, "promiscuous mode\n"); - priv->rxfilter = RXFILTER_PROMISC; - } else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) { - if (netif_msg_link(priv)) - dev_info(&dev->dev, "%smulticast mode\n", - (dev->flags & IFF_ALLMULTI) ? "all-" : ""); - priv->rxfilter = RXFILTER_MULTI; - } else { - if (netif_msg_link(priv)) - dev_info(&dev->dev, "normal mode\n"); - priv->rxfilter = RXFILTER_NORMAL; - } - - if (oldfilter != priv->rxfilter) - schedule_work(&priv->setrx_work); -} - -static void enc28j60_setrx_work_handler(struct work_struct *work) -{ - struct enc28j60_net *priv = - container_of(work, struct enc28j60_net, setrx_work); - - if (priv->rxfilter == RXFILTER_PROMISC) { - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": promiscuous mode\n"); - locked_regb_write(priv, ERXFCON, 0x00); - } else if (priv->rxfilter == RXFILTER_MULTI) { - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": multicast mode\n"); - locked_regb_write(priv, ERXFCON, - ERXFCON_UCEN | ERXFCON_CRCEN | - ERXFCON_BCEN | ERXFCON_MCEN); - } else { - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": normal mode\n"); - locked_regb_write(priv, ERXFCON, - ERXFCON_UCEN | ERXFCON_CRCEN | - ERXFCON_BCEN); - } -} - -static void enc28j60_restart_work_handler(struct work_struct *work) -{ - struct enc28j60_net *priv = - container_of(work, struct enc28j60_net, restart_work); - struct net_device *ndev = priv->netdev; - int ret; - - rtnl_lock(); - if (netif_running(ndev)) { - enc28j60_net_close(ndev); - ret = enc28j60_net_open(ndev); - if (unlikely(ret)) { - dev_info(&ndev->dev, " could not restart %d\n", ret); - dev_close(ndev); - } - } - rtnl_unlock(); -} - -/* ......................... ETHTOOL SUPPORT ........................... */ - -static void -enc28j60_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 -enc28j60_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - struct enc28j60_net *priv = netdev_priv(dev); - - cmd->transceiver = XCVR_INTERNAL; - cmd->supported = SUPPORTED_10baseT_Half - | SUPPORTED_10baseT_Full - | SUPPORTED_TP; - ethtool_cmd_speed_set(cmd, SPEED_10); - cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; - cmd->port = PORT_TP; - cmd->autoneg = AUTONEG_DISABLE; - - return 0; -} - -static int -enc28j60_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) -{ - return enc28j60_setlink(dev, cmd->autoneg, - ethtool_cmd_speed(cmd), cmd->duplex); -} - -static u32 enc28j60_get_msglevel(struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - return priv->msg_enable; -} - -static void enc28j60_set_msglevel(struct net_device *dev, u32 val) -{ - struct enc28j60_net *priv = netdev_priv(dev); - priv->msg_enable = val; -} - -static const struct ethtool_ops enc28j60_ethtool_ops = { - .get_settings = enc28j60_get_settings, - .set_settings = enc28j60_set_settings, - .get_drvinfo = enc28j60_get_drvinfo, - .get_msglevel = enc28j60_get_msglevel, - .set_msglevel = enc28j60_set_msglevel, -}; - -static int enc28j60_chipset_init(struct net_device *dev) -{ - struct enc28j60_net *priv = netdev_priv(dev); - - return enc28j60_hw_init(priv); -} - -static const struct net_device_ops enc28j60_netdev_ops = { - .ndo_open = enc28j60_net_open, - .ndo_stop = enc28j60_net_close, - .ndo_start_xmit = enc28j60_send_packet, - .ndo_set_multicast_list = enc28j60_set_multicast_list, - .ndo_set_mac_address = enc28j60_set_mac_address, - .ndo_tx_timeout = enc28j60_tx_timeout, - .ndo_change_mtu = eth_change_mtu, - .ndo_validate_addr = eth_validate_addr, -}; - -static int __devinit enc28j60_probe(struct spi_device *spi) -{ - struct net_device *dev; - struct enc28j60_net *priv; - int ret = 0; - - if (netif_msg_drv(&debug)) - dev_info(&spi->dev, DRV_NAME " Ethernet driver %s loaded\n", - DRV_VERSION); - - dev = alloc_etherdev(sizeof(struct enc28j60_net)); - if (!dev) { - if (netif_msg_drv(&debug)) - dev_err(&spi->dev, DRV_NAME - ": unable to alloc new ethernet\n"); - ret = -ENOMEM; - goto error_alloc; - } - priv = netdev_priv(dev); - - priv->netdev = dev; /* priv to netdev reference */ - priv->spi = spi; /* priv to spi reference */ - priv->msg_enable = netif_msg_init(debug.msg_enable, - ENC28J60_MSG_DEFAULT); - mutex_init(&priv->lock); - INIT_WORK(&priv->tx_work, enc28j60_tx_work_handler); - INIT_WORK(&priv->setrx_work, enc28j60_setrx_work_handler); - INIT_WORK(&priv->irq_work, enc28j60_irq_work_handler); - INIT_WORK(&priv->restart_work, enc28j60_restart_work_handler); - dev_set_drvdata(&spi->dev, priv); /* spi to priv reference */ - SET_NETDEV_DEV(dev, &spi->dev); - - if (!enc28j60_chipset_init(dev)) { - if (netif_msg_probe(priv)) - dev_info(&spi->dev, DRV_NAME " chip not found\n"); - ret = -EIO; - goto error_irq; - } - random_ether_addr(dev->dev_addr); - enc28j60_set_hw_macaddr(dev); - - /* Board setup must set the relevant edge trigger type; - * level triggers won't currently work. - */ - ret = request_irq(spi->irq, enc28j60_irq, 0, DRV_NAME, priv); - if (ret < 0) { - if (netif_msg_probe(priv)) - dev_err(&spi->dev, DRV_NAME ": request irq %d failed " - "(ret = %d)\n", spi->irq, ret); - goto error_irq; - } - - dev->if_port = IF_PORT_10BASET; - dev->irq = spi->irq; - dev->netdev_ops = &enc28j60_netdev_ops; - dev->watchdog_timeo = TX_TIMEOUT; - SET_ETHTOOL_OPS(dev, &enc28j60_ethtool_ops); - - enc28j60_lowpower(priv, true); - - ret = register_netdev(dev); - if (ret) { - if (netif_msg_probe(priv)) - dev_err(&spi->dev, "register netdev " DRV_NAME - " failed (ret = %d)\n", ret); - goto error_register; - } - dev_info(&dev->dev, DRV_NAME " driver registered\n"); - - return 0; - -error_register: - free_irq(spi->irq, priv); -error_irq: - free_netdev(dev); -error_alloc: - return ret; -} - -static int __devexit enc28j60_remove(struct spi_device *spi) -{ - struct enc28j60_net *priv = dev_get_drvdata(&spi->dev); - - if (netif_msg_drv(priv)) - printk(KERN_DEBUG DRV_NAME ": remove\n"); - - unregister_netdev(priv->netdev); - free_irq(spi->irq, priv); - free_netdev(priv->netdev); - - return 0; -} - -static struct spi_driver enc28j60_driver = { - .driver = { - .name = DRV_NAME, - .owner = THIS_MODULE, - }, - .probe = enc28j60_probe, - .remove = __devexit_p(enc28j60_remove), -}; - -static int __init enc28j60_init(void) -{ - msec20_to_jiffies = msecs_to_jiffies(20); - - return spi_register_driver(&enc28j60_driver); -} - -module_init(enc28j60_init); - -static void __exit enc28j60_exit(void) -{ - spi_unregister_driver(&enc28j60_driver); -} - -module_exit(enc28j60_exit); - -MODULE_DESCRIPTION(DRV_NAME " ethernet driver"); -MODULE_AUTHOR("Claudio Lanconelli "); -MODULE_LICENSE("GPL"); -module_param_named(debug, debug.msg_enable, int, 0); -MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., ffff=all)"); -MODULE_ALIAS("spi:" DRV_NAME); diff --git a/drivers/net/enc28j60_hw.h b/drivers/net/enc28j60_hw.h deleted file mode 100644 index 25b41de49f0e..000000000000 --- a/drivers/net/enc28j60_hw.h +++ /dev/null @@ -1,309 +0,0 @@ -/* - * enc28j60_hw.h: EDTP FrameThrower style enc28j60 registers - * - * $Id: enc28j60_hw.h,v 1.9 2007/12/14 11:59:16 claudio Exp $ - */ - -#ifndef _ENC28J60_HW_H -#define _ENC28J60_HW_H - -/* - * ENC28J60 Control Registers - * Control register definitions are a combination of address, - * bank number, and Ethernet/MAC/PHY indicator bits. - * - Register address (bits 0-4) - * - Bank number (bits 5-6) - * - MAC/MII indicator (bit 7) - */ -#define ADDR_MASK 0x1F -#define BANK_MASK 0x60 -#define SPRD_MASK 0x80 -/* All-bank registers */ -#define EIE 0x1B -#define EIR 0x1C -#define ESTAT 0x1D -#define ECON2 0x1E -#define ECON1 0x1F -/* Bank 0 registers */ -#define ERDPTL (0x00|0x00) -#define ERDPTH (0x01|0x00) -#define EWRPTL (0x02|0x00) -#define EWRPTH (0x03|0x00) -#define ETXSTL (0x04|0x00) -#define ETXSTH (0x05|0x00) -#define ETXNDL (0x06|0x00) -#define ETXNDH (0x07|0x00) -#define ERXSTL (0x08|0x00) -#define ERXSTH (0x09|0x00) -#define ERXNDL (0x0A|0x00) -#define ERXNDH (0x0B|0x00) -#define ERXRDPTL (0x0C|0x00) -#define ERXRDPTH (0x0D|0x00) -#define ERXWRPTL (0x0E|0x00) -#define ERXWRPTH (0x0F|0x00) -#define EDMASTL (0x10|0x00) -#define EDMASTH (0x11|0x00) -#define EDMANDL (0x12|0x00) -#define EDMANDH (0x13|0x00) -#define EDMADSTL (0x14|0x00) -#define EDMADSTH (0x15|0x00) -#define EDMACSL (0x16|0x00) -#define EDMACSH (0x17|0x00) -/* Bank 1 registers */ -#define EHT0 (0x00|0x20) -#define EHT1 (0x01|0x20) -#define EHT2 (0x02|0x20) -#define EHT3 (0x03|0x20) -#define EHT4 (0x04|0x20) -#define EHT5 (0x05|0x20) -#define EHT6 (0x06|0x20) -#define EHT7 (0x07|0x20) -#define EPMM0 (0x08|0x20) -#define EPMM1 (0x09|0x20) -#define EPMM2 (0x0A|0x20) -#define EPMM3 (0x0B|0x20) -#define EPMM4 (0x0C|0x20) -#define EPMM5 (0x0D|0x20) -#define EPMM6 (0x0E|0x20) -#define EPMM7 (0x0F|0x20) -#define EPMCSL (0x10|0x20) -#define EPMCSH (0x11|0x20) -#define EPMOL (0x14|0x20) -#define EPMOH (0x15|0x20) -#define EWOLIE (0x16|0x20) -#define EWOLIR (0x17|0x20) -#define ERXFCON (0x18|0x20) -#define EPKTCNT (0x19|0x20) -/* Bank 2 registers */ -#define MACON1 (0x00|0x40|SPRD_MASK) -/* #define MACON2 (0x01|0x40|SPRD_MASK) */ -#define MACON3 (0x02|0x40|SPRD_MASK) -#define MACON4 (0x03|0x40|SPRD_MASK) -#define MABBIPG (0x04|0x40|SPRD_MASK) -#define MAIPGL (0x06|0x40|SPRD_MASK) -#define MAIPGH (0x07|0x40|SPRD_MASK) -#define MACLCON1 (0x08|0x40|SPRD_MASK) -#define MACLCON2 (0x09|0x40|SPRD_MASK) -#define MAMXFLL (0x0A|0x40|SPRD_MASK) -#define MAMXFLH (0x0B|0x40|SPRD_MASK) -#define MAPHSUP (0x0D|0x40|SPRD_MASK) -#define MICON (0x11|0x40|SPRD_MASK) -#define MICMD (0x12|0x40|SPRD_MASK) -#define MIREGADR (0x14|0x40|SPRD_MASK) -#define MIWRL (0x16|0x40|SPRD_MASK) -#define MIWRH (0x17|0x40|SPRD_MASK) -#define MIRDL (0x18|0x40|SPRD_MASK) -#define MIRDH (0x19|0x40|SPRD_MASK) -/* Bank 3 registers */ -#define MAADR1 (0x00|0x60|SPRD_MASK) -#define MAADR0 (0x01|0x60|SPRD_MASK) -#define MAADR3 (0x02|0x60|SPRD_MASK) -#define MAADR2 (0x03|0x60|SPRD_MASK) -#define MAADR5 (0x04|0x60|SPRD_MASK) -#define MAADR4 (0x05|0x60|SPRD_MASK) -#define EBSTSD (0x06|0x60) -#define EBSTCON (0x07|0x60) -#define EBSTCSL (0x08|0x60) -#define EBSTCSH (0x09|0x60) -#define MISTAT (0x0A|0x60|SPRD_MASK) -#define EREVID (0x12|0x60) -#define ECOCON (0x15|0x60) -#define EFLOCON (0x17|0x60) -#define EPAUSL (0x18|0x60) -#define EPAUSH (0x19|0x60) -/* PHY registers */ -#define PHCON1 0x00 -#define PHSTAT1 0x01 -#define PHHID1 0x02 -#define PHHID2 0x03 -#define PHCON2 0x10 -#define PHSTAT2 0x11 -#define PHIE 0x12 -#define PHIR 0x13 -#define PHLCON 0x14 - -/* ENC28J60 EIE Register Bit Definitions */ -#define EIE_INTIE 0x80 -#define EIE_PKTIE 0x40 -#define EIE_DMAIE 0x20 -#define EIE_LINKIE 0x10 -#define EIE_TXIE 0x08 -/* #define EIE_WOLIE 0x04 (reserved) */ -#define EIE_TXERIE 0x02 -#define EIE_RXERIE 0x01 -/* ENC28J60 EIR Register Bit Definitions */ -#define EIR_PKTIF 0x40 -#define EIR_DMAIF 0x20 -#define EIR_LINKIF 0x10 -#define EIR_TXIF 0x08 -/* #define EIR_WOLIF 0x04 (reserved) */ -#define EIR_TXERIF 0x02 -#define EIR_RXERIF 0x01 -/* ENC28J60 ESTAT Register Bit Definitions */ -#define ESTAT_INT 0x80 -#define ESTAT_LATECOL 0x10 -#define ESTAT_RXBUSY 0x04 -#define ESTAT_TXABRT 0x02 -#define ESTAT_CLKRDY 0x01 -/* ENC28J60 ECON2 Register Bit Definitions */ -#define ECON2_AUTOINC 0x80 -#define ECON2_PKTDEC 0x40 -#define ECON2_PWRSV 0x20 -#define ECON2_VRPS 0x08 -/* ENC28J60 ECON1 Register Bit Definitions */ -#define ECON1_TXRST 0x80 -#define ECON1_RXRST 0x40 -#define ECON1_DMAST 0x20 -#define ECON1_CSUMEN 0x10 -#define ECON1_TXRTS 0x08 -#define ECON1_RXEN 0x04 -#define ECON1_BSEL1 0x02 -#define ECON1_BSEL0 0x01 -/* ENC28J60 MACON1 Register Bit Definitions */ -#define MACON1_LOOPBK 0x10 -#define MACON1_TXPAUS 0x08 -#define MACON1_RXPAUS 0x04 -#define MACON1_PASSALL 0x02 -#define MACON1_MARXEN 0x01 -/* ENC28J60 MACON2 Register Bit Definitions */ -#define MACON2_MARST 0x80 -#define MACON2_RNDRST 0x40 -#define MACON2_MARXRST 0x08 -#define MACON2_RFUNRST 0x04 -#define MACON2_MATXRST 0x02 -#define MACON2_TFUNRST 0x01 -/* ENC28J60 MACON3 Register Bit Definitions */ -#define MACON3_PADCFG2 0x80 -#define MACON3_PADCFG1 0x40 -#define MACON3_PADCFG0 0x20 -#define MACON3_TXCRCEN 0x10 -#define MACON3_PHDRLEN 0x08 -#define MACON3_HFRMLEN 0x04 -#define MACON3_FRMLNEN 0x02 -#define MACON3_FULDPX 0x01 -/* ENC28J60 MICMD Register Bit Definitions */ -#define MICMD_MIISCAN 0x02 -#define MICMD_MIIRD 0x01 -/* ENC28J60 MISTAT Register Bit Definitions */ -#define MISTAT_NVALID 0x04 -#define MISTAT_SCAN 0x02 -#define MISTAT_BUSY 0x01 -/* ENC28J60 ERXFCON Register Bit Definitions */ -#define ERXFCON_UCEN 0x80 -#define ERXFCON_ANDOR 0x40 -#define ERXFCON_CRCEN 0x20 -#define ERXFCON_PMEN 0x10 -#define ERXFCON_MPEN 0x08 -#define ERXFCON_HTEN 0x04 -#define ERXFCON_MCEN 0x02 -#define ERXFCON_BCEN 0x01 - -/* ENC28J60 PHY PHCON1 Register Bit Definitions */ -#define PHCON1_PRST 0x8000 -#define PHCON1_PLOOPBK 0x4000 -#define PHCON1_PPWRSV 0x0800 -#define PHCON1_PDPXMD 0x0100 -/* ENC28J60 PHY PHSTAT1 Register Bit Definitions */ -#define PHSTAT1_PFDPX 0x1000 -#define PHSTAT1_PHDPX 0x0800 -#define PHSTAT1_LLSTAT 0x0004 -#define PHSTAT1_JBSTAT 0x0002 -/* ENC28J60 PHY PHSTAT2 Register Bit Definitions */ -#define PHSTAT2_TXSTAT (1 << 13) -#define PHSTAT2_RXSTAT (1 << 12) -#define PHSTAT2_COLSTAT (1 << 11) -#define PHSTAT2_LSTAT (1 << 10) -#define PHSTAT2_DPXSTAT (1 << 9) -#define PHSTAT2_PLRITY (1 << 5) -/* ENC28J60 PHY PHCON2 Register Bit Definitions */ -#define PHCON2_FRCLINK 0x4000 -#define PHCON2_TXDIS 0x2000 -#define PHCON2_JABBER 0x0400 -#define PHCON2_HDLDIS 0x0100 -/* ENC28J60 PHY PHIE Register Bit Definitions */ -#define PHIE_PLNKIE (1 << 4) -#define PHIE_PGEIE (1 << 1) -/* ENC28J60 PHY PHIR Register Bit Definitions */ -#define PHIR_PLNKIF (1 << 4) -#define PHIR_PGEIF (1 << 1) - -/* ENC28J60 Packet Control Byte Bit Definitions */ -#define PKTCTRL_PHUGEEN 0x08 -#define PKTCTRL_PPADEN 0x04 -#define PKTCTRL_PCRCEN 0x02 -#define PKTCTRL_POVERRIDE 0x01 - -/* ENC28J60 Transmit Status Vector */ -#define TSV_TXBYTECNT 0 -#define TSV_TXCOLLISIONCNT 16 -#define TSV_TXCRCERROR 20 -#define TSV_TXLENCHKERROR 21 -#define TSV_TXLENOUTOFRANGE 22 -#define TSV_TXDONE 23 -#define TSV_TXMULTICAST 24 -#define TSV_TXBROADCAST 25 -#define TSV_TXPACKETDEFER 26 -#define TSV_TXEXDEFER 27 -#define TSV_TXEXCOLLISION 28 -#define TSV_TXLATECOLLISION 29 -#define TSV_TXGIANT 30 -#define TSV_TXUNDERRUN 31 -#define TSV_TOTBYTETXONWIRE 32 -#define TSV_TXCONTROLFRAME 48 -#define TSV_TXPAUSEFRAME 49 -#define TSV_BACKPRESSUREAPP 50 -#define TSV_TXVLANTAGFRAME 51 - -#define TSV_SIZE 7 -#define TSV_BYTEOF(x) ((x) / 8) -#define TSV_BITMASK(x) (1 << ((x) % 8)) -#define TSV_GETBIT(x, y) (((x)[TSV_BYTEOF(y)] & TSV_BITMASK(y)) ? 1 : 0) - -/* ENC28J60 Receive Status Vector */ -#define RSV_RXLONGEVDROPEV 16 -#define RSV_CARRIEREV 18 -#define RSV_CRCERROR 20 -#define RSV_LENCHECKERR 21 -#define RSV_LENOUTOFRANGE 22 -#define RSV_RXOK 23 -#define RSV_RXMULTICAST 24 -#define RSV_RXBROADCAST 25 -#define RSV_DRIBBLENIBBLE 26 -#define RSV_RXCONTROLFRAME 27 -#define RSV_RXPAUSEFRAME 28 -#define RSV_RXUNKNOWNOPCODE 29 -#define RSV_RXTYPEVLAN 30 - -#define RSV_SIZE 6 -#define RSV_BITMASK(x) (1 << ((x) - 16)) -#define RSV_GETBIT(x, y) (((x) & RSV_BITMASK(y)) ? 1 : 0) - - -/* SPI operation codes */ -#define ENC28J60_READ_CTRL_REG 0x00 -#define ENC28J60_READ_BUF_MEM 0x3A -#define ENC28J60_WRITE_CTRL_REG 0x40 -#define ENC28J60_WRITE_BUF_MEM 0x7A -#define ENC28J60_BIT_FIELD_SET 0x80 -#define ENC28J60_BIT_FIELD_CLR 0xA0 -#define ENC28J60_SOFT_RESET 0xFF - - -/* buffer boundaries applied to internal 8K ram - * entire available packet buffer space is allocated. - * Give TX buffer space for one full ethernet frame (~1500 bytes) - * receive buffer gets the rest */ -#define TXSTART_INIT 0x1A00 -#define TXEND_INIT 0x1FFF - -/* Put RX buffer at 0 as suggested by the Errata datasheet */ -#define RXSTART_INIT 0x0000 -#define RXEND_INIT 0x19FF - -/* maximum ethernet frame length */ -#define MAX_FRAMELEN 1518 - -/* Preferred half duplex: LEDA: Link status LEDB: Rx/Tx activity */ -#define ENC28J60_LAMPS_MODE 0x3476 - -#endif diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig index 32561c71040d..0cec25cbf36b 100644 --- a/drivers/net/ethernet/Kconfig +++ b/drivers/net/ethernet/Kconfig @@ -78,6 +78,7 @@ config LANTIQ_ETOP source "drivers/net/ethernet/marvell/Kconfig" source "drivers/net/ethernet/mellanox/Kconfig" source "drivers/net/ethernet/micrel/Kconfig" +source "drivers/net/ethernet/microchip/Kconfig" config MIPS_SIM_NET tristate "MIPS simulator Network device" diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile index 94f1be8e822b..ebe8aee3f839 100644 --- a/drivers/net/ethernet/Makefile +++ b/drivers/net/ethernet/Makefile @@ -36,6 +36,7 @@ obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/ obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/ obj-$(CONFIG_NET_VENDOR_MICREL) += micrel/ +obj-$(CONFIG_NET_VENDOR_MICROCHIP) += microchip/ obj-$(CONFIG_MIPS_SIM_NET) += mipsnet.o obj-$(CONFIG_NET_VENDOR_MYRI) += myricom/ obj-$(CONFIG_FEALNX) += fealnx.o diff --git a/drivers/net/ethernet/microchip/Kconfig b/drivers/net/ethernet/microchip/Kconfig new file mode 100644 index 000000000000..53b0b04935a3 --- /dev/null +++ b/drivers/net/ethernet/microchip/Kconfig @@ -0,0 +1,37 @@ +# +# Microchip network device configuration +# + +config NET_VENDOR_MICROCHIP + bool "Microchip devices" + depends on SPI && EXPERIMENTAL + ---help--- + If you have a network (Ethernet) card belonging to this class, say Y + and read the Ethernet-HOWTO, available from + . + + Note that the answer to this question doesn't directly affect the + kernel: saying N will just cause the configurator to skip all + the questions about Microchip cards. If you say Y, you will be asked + for your specific card in the following questions. + +if NET_VENDOR_MICROCHIP + +config ENC28J60 + tristate "ENC28J60 support" + depends on SPI && EXPERIMENTAL + select CRC32 + ---help--- + Support for the Microchip EN28J60 ethernet chip. + + To compile this driver as a module, choose M here. The module will be + called enc28j60. + +config ENC28J60_WRITEVERIFY + bool "Enable write verify" + depends on ENC28J60 + ---help--- + Enable the verify after the buffer write useful for debugging purpose. + If unsure, say N. + +endif # NET_VENDOR_MICROCHIP diff --git a/drivers/net/ethernet/microchip/Makefile b/drivers/net/ethernet/microchip/Makefile new file mode 100644 index 000000000000..573d4292b9ea --- /dev/null +++ b/drivers/net/ethernet/microchip/Makefile @@ -0,0 +1,5 @@ +# +# Makefile for the Microchip network device drivers. +# + +obj-$(CONFIG_ENC28J60) += enc28j60.o diff --git a/drivers/net/ethernet/microchip/enc28j60.c b/drivers/net/ethernet/microchip/enc28j60.c new file mode 100644 index 000000000000..2837ce209cd7 --- /dev/null +++ b/drivers/net/ethernet/microchip/enc28j60.c @@ -0,0 +1,1667 @@ +/* + * Microchip ENC28J60 ethernet driver (MAC + PHY) + * + * Copyright (C) 2007 Eurek srl + * Author: Claudio Lanconelli + * based on enc28j60.c written by David Anders for 2.4 kernel version + * + * 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. + * + * $Id: enc28j60.c,v 1.22 2007/12/20 10:47:01 claudio Exp $ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "enc28j60_hw.h" + +#define DRV_NAME "enc28j60" +#define DRV_VERSION "1.01" + +#define SPI_OPLEN 1 + +#define ENC28J60_MSG_DEFAULT \ + (NETIF_MSG_PROBE | NETIF_MSG_IFUP | NETIF_MSG_IFDOWN | NETIF_MSG_LINK) + +/* Buffer size required for the largest SPI transfer (i.e., reading a + * frame). */ +#define SPI_TRANSFER_BUF_LEN (4 + MAX_FRAMELEN) + +#define TX_TIMEOUT (4 * HZ) + +/* Max TX retries in case of collision as suggested by errata datasheet */ +#define MAX_TX_RETRYCOUNT 16 + +enum { + RXFILTER_NORMAL, + RXFILTER_MULTI, + RXFILTER_PROMISC +}; + +/* Driver local data */ +struct enc28j60_net { + struct net_device *netdev; + struct spi_device *spi; + struct mutex lock; + struct sk_buff *tx_skb; + struct work_struct tx_work; + struct work_struct irq_work; + struct work_struct setrx_work; + struct work_struct restart_work; + u8 bank; /* current register bank selected */ + u16 next_pk_ptr; /* next packet pointer within FIFO */ + u16 max_pk_counter; /* statistics: max packet counter */ + u16 tx_retry_count; + bool hw_enable; + bool full_duplex; + int rxfilter; + u32 msg_enable; + u8 spi_transfer_buf[SPI_TRANSFER_BUF_LEN]; +}; + +/* use ethtool to change the level for any given device */ +static struct { + u32 msg_enable; +} debug = { -1 }; + +/* + * SPI read buffer + * wait for the SPI transfer and copy received data to destination + */ +static int +spi_read_buf(struct enc28j60_net *priv, int len, u8 *data) +{ + u8 *rx_buf = priv->spi_transfer_buf + 4; + u8 *tx_buf = priv->spi_transfer_buf; + struct spi_transfer t = { + .tx_buf = tx_buf, + .rx_buf = rx_buf, + .len = SPI_OPLEN + len, + }; + struct spi_message msg; + int ret; + + tx_buf[0] = ENC28J60_READ_BUF_MEM; + tx_buf[1] = tx_buf[2] = tx_buf[3] = 0; /* don't care */ + + spi_message_init(&msg); + spi_message_add_tail(&t, &msg); + ret = spi_sync(priv->spi, &msg); + if (ret == 0) { + memcpy(data, &rx_buf[SPI_OPLEN], len); + ret = msg.status; + } + if (ret && netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", + __func__, ret); + + return ret; +} + +/* + * SPI write buffer + */ +static int spi_write_buf(struct enc28j60_net *priv, int len, + const u8 *data) +{ + int ret; + + if (len > SPI_TRANSFER_BUF_LEN - 1 || len <= 0) + ret = -EINVAL; + else { + priv->spi_transfer_buf[0] = ENC28J60_WRITE_BUF_MEM; + memcpy(&priv->spi_transfer_buf[1], data, len); + ret = spi_write(priv->spi, priv->spi_transfer_buf, len + 1); + if (ret && netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", + __func__, ret); + } + return ret; +} + +/* + * basic SPI read operation + */ +static u8 spi_read_op(struct enc28j60_net *priv, u8 op, + u8 addr) +{ + u8 tx_buf[2]; + u8 rx_buf[4]; + u8 val = 0; + int ret; + int slen = SPI_OPLEN; + + /* do dummy read if needed */ + if (addr & SPRD_MASK) + slen++; + + tx_buf[0] = op | (addr & ADDR_MASK); + ret = spi_write_then_read(priv->spi, tx_buf, 1, rx_buf, slen); + if (ret) + printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", + __func__, ret); + else + val = rx_buf[slen - 1]; + + return val; +} + +/* + * basic SPI write operation + */ +static int spi_write_op(struct enc28j60_net *priv, u8 op, + u8 addr, u8 val) +{ + int ret; + + priv->spi_transfer_buf[0] = op | (addr & ADDR_MASK); + priv->spi_transfer_buf[1] = val; + ret = spi_write(priv->spi, priv->spi_transfer_buf, 2); + if (ret && netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() failed: ret = %d\n", + __func__, ret); + return ret; +} + +static void enc28j60_soft_reset(struct enc28j60_net *priv) +{ + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); + + spi_write_op(priv, ENC28J60_SOFT_RESET, 0, ENC28J60_SOFT_RESET); + /* Errata workaround #1, CLKRDY check is unreliable, + * delay at least 1 mS instead */ + udelay(2000); +} + +/* + * select the current register bank if necessary + */ +static void enc28j60_set_bank(struct enc28j60_net *priv, u8 addr) +{ + u8 b = (addr & BANK_MASK) >> 5; + + /* These registers (EIE, EIR, ESTAT, ECON2, ECON1) + * are present in all banks, no need to switch bank + */ + if (addr >= EIE && addr <= ECON1) + return; + + /* Clear or set each bank selection bit as needed */ + if ((b & ECON1_BSEL0) != (priv->bank & ECON1_BSEL0)) { + if (b & ECON1_BSEL0) + spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1, + ECON1_BSEL0); + else + spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1, + ECON1_BSEL0); + } + if ((b & ECON1_BSEL1) != (priv->bank & ECON1_BSEL1)) { + if (b & ECON1_BSEL1) + spi_write_op(priv, ENC28J60_BIT_FIELD_SET, ECON1, + ECON1_BSEL1); + else + spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, ECON1, + ECON1_BSEL1); + } + priv->bank = b; +} + +/* + * Register access routines through the SPI bus. + * Every register access comes in two flavours: + * - nolock_xxx: caller needs to invoke mutex_lock, usually to access + * atomically more than one register + * - locked_xxx: caller doesn't need to invoke mutex_lock, single access + * + * Some registers can be accessed through the bit field clear and + * bit field set to avoid a read modify write cycle. + */ + +/* + * Register bit field Set + */ +static void nolock_reg_bfset(struct enc28j60_net *priv, + u8 addr, u8 mask) +{ + enc28j60_set_bank(priv, addr); + spi_write_op(priv, ENC28J60_BIT_FIELD_SET, addr, mask); +} + +static void locked_reg_bfset(struct enc28j60_net *priv, + u8 addr, u8 mask) +{ + mutex_lock(&priv->lock); + nolock_reg_bfset(priv, addr, mask); + mutex_unlock(&priv->lock); +} + +/* + * Register bit field Clear + */ +static void nolock_reg_bfclr(struct enc28j60_net *priv, + u8 addr, u8 mask) +{ + enc28j60_set_bank(priv, addr); + spi_write_op(priv, ENC28J60_BIT_FIELD_CLR, addr, mask); +} + +static void locked_reg_bfclr(struct enc28j60_net *priv, + u8 addr, u8 mask) +{ + mutex_lock(&priv->lock); + nolock_reg_bfclr(priv, addr, mask); + mutex_unlock(&priv->lock); +} + +/* + * Register byte read + */ +static int nolock_regb_read(struct enc28j60_net *priv, + u8 address) +{ + enc28j60_set_bank(priv, address); + return spi_read_op(priv, ENC28J60_READ_CTRL_REG, address); +} + +static int locked_regb_read(struct enc28j60_net *priv, + u8 address) +{ + int ret; + + mutex_lock(&priv->lock); + ret = nolock_regb_read(priv, address); + mutex_unlock(&priv->lock); + + return ret; +} + +/* + * Register word read + */ +static int nolock_regw_read(struct enc28j60_net *priv, + u8 address) +{ + int rl, rh; + + enc28j60_set_bank(priv, address); + rl = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address); + rh = spi_read_op(priv, ENC28J60_READ_CTRL_REG, address + 1); + + return (rh << 8) | rl; +} + +static int locked_regw_read(struct enc28j60_net *priv, + u8 address) +{ + int ret; + + mutex_lock(&priv->lock); + ret = nolock_regw_read(priv, address); + mutex_unlock(&priv->lock); + + return ret; +} + +/* + * Register byte write + */ +static void nolock_regb_write(struct enc28j60_net *priv, + u8 address, u8 data) +{ + enc28j60_set_bank(priv, address); + spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, data); +} + +static void locked_regb_write(struct enc28j60_net *priv, + u8 address, u8 data) +{ + mutex_lock(&priv->lock); + nolock_regb_write(priv, address, data); + mutex_unlock(&priv->lock); +} + +/* + * Register word write + */ +static void nolock_regw_write(struct enc28j60_net *priv, + u8 address, u16 data) +{ + enc28j60_set_bank(priv, address); + spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address, (u8) data); + spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, address + 1, + (u8) (data >> 8)); +} + +static void locked_regw_write(struct enc28j60_net *priv, + u8 address, u16 data) +{ + mutex_lock(&priv->lock); + nolock_regw_write(priv, address, data); + mutex_unlock(&priv->lock); +} + +/* + * Buffer memory read + * Select the starting address and execute a SPI buffer read + */ +static void enc28j60_mem_read(struct enc28j60_net *priv, + u16 addr, int len, u8 *data) +{ + mutex_lock(&priv->lock); + nolock_regw_write(priv, ERDPTL, addr); +#ifdef CONFIG_ENC28J60_WRITEVERIFY + if (netif_msg_drv(priv)) { + u16 reg; + reg = nolock_regw_read(priv, ERDPTL); + if (reg != addr) + printk(KERN_DEBUG DRV_NAME ": %s() error writing ERDPT " + "(0x%04x - 0x%04x)\n", __func__, reg, addr); + } +#endif + spi_read_buf(priv, len, data); + mutex_unlock(&priv->lock); +} + +/* + * Write packet to enc28j60 TX buffer memory + */ +static void +enc28j60_packet_write(struct enc28j60_net *priv, int len, const u8 *data) +{ + mutex_lock(&priv->lock); + /* Set the write pointer to start of transmit buffer area */ + nolock_regw_write(priv, EWRPTL, TXSTART_INIT); +#ifdef CONFIG_ENC28J60_WRITEVERIFY + if (netif_msg_drv(priv)) { + u16 reg; + reg = nolock_regw_read(priv, EWRPTL); + if (reg != TXSTART_INIT) + printk(KERN_DEBUG DRV_NAME + ": %s() ERWPT:0x%04x != 0x%04x\n", + __func__, reg, TXSTART_INIT); + } +#endif + /* Set the TXND pointer to correspond to the packet size given */ + nolock_regw_write(priv, ETXNDL, TXSTART_INIT + len); + /* write per-packet control byte */ + spi_write_op(priv, ENC28J60_WRITE_BUF_MEM, 0, 0x00); + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME + ": %s() after control byte ERWPT:0x%04x\n", + __func__, nolock_regw_read(priv, EWRPTL)); + /* copy the packet into the transmit buffer */ + spi_write_buf(priv, len, data); + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME + ": %s() after write packet ERWPT:0x%04x, len=%d\n", + __func__, nolock_regw_read(priv, EWRPTL), len); + mutex_unlock(&priv->lock); +} + +static unsigned long msec20_to_jiffies; + +static int poll_ready(struct enc28j60_net *priv, u8 reg, u8 mask, u8 val) +{ + unsigned long timeout = jiffies + msec20_to_jiffies; + + /* 20 msec timeout read */ + while ((nolock_regb_read(priv, reg) & mask) != val) { + if (time_after(jiffies, timeout)) { + if (netif_msg_drv(priv)) + dev_dbg(&priv->spi->dev, + "reg %02x ready timeout!\n", reg); + return -ETIMEDOUT; + } + cpu_relax(); + } + return 0; +} + +/* + * Wait until the PHY operation is complete. + */ +static int wait_phy_ready(struct enc28j60_net *priv) +{ + return poll_ready(priv, MISTAT, MISTAT_BUSY, 0) ? 0 : 1; +} + +/* + * PHY register read + * PHY registers are not accessed directly, but through the MII + */ +static u16 enc28j60_phy_read(struct enc28j60_net *priv, u8 address) +{ + u16 ret; + + mutex_lock(&priv->lock); + /* set the PHY register address */ + nolock_regb_write(priv, MIREGADR, address); + /* start the register read operation */ + nolock_regb_write(priv, MICMD, MICMD_MIIRD); + /* wait until the PHY read completes */ + wait_phy_ready(priv); + /* quit reading */ + nolock_regb_write(priv, MICMD, 0x00); + /* return the data */ + ret = nolock_regw_read(priv, MIRDL); + mutex_unlock(&priv->lock); + + return ret; +} + +static int enc28j60_phy_write(struct enc28j60_net *priv, u8 address, u16 data) +{ + int ret; + + mutex_lock(&priv->lock); + /* set the PHY register address */ + nolock_regb_write(priv, MIREGADR, address); + /* write the PHY data */ + nolock_regw_write(priv, MIWRL, data); + /* wait until the PHY write completes and return */ + ret = wait_phy_ready(priv); + mutex_unlock(&priv->lock); + + return ret; +} + +/* + * Program the hardware MAC address from dev->dev_addr. + */ +static int enc28j60_set_hw_macaddr(struct net_device *ndev) +{ + int ret; + struct enc28j60_net *priv = netdev_priv(ndev); + + mutex_lock(&priv->lock); + if (!priv->hw_enable) { + if (netif_msg_drv(priv)) + printk(KERN_INFO DRV_NAME + ": %s: Setting MAC address to %pM\n", + ndev->name, ndev->dev_addr); + /* NOTE: MAC address in ENC28J60 is byte-backward */ + nolock_regb_write(priv, MAADR5, ndev->dev_addr[0]); + nolock_regb_write(priv, MAADR4, ndev->dev_addr[1]); + nolock_regb_write(priv, MAADR3, ndev->dev_addr[2]); + nolock_regb_write(priv, MAADR2, ndev->dev_addr[3]); + nolock_regb_write(priv, MAADR1, ndev->dev_addr[4]); + nolock_regb_write(priv, MAADR0, ndev->dev_addr[5]); + ret = 0; + } else { + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME + ": %s() Hardware must be disabled to set " + "Mac address\n", __func__); + ret = -EBUSY; + } + mutex_unlock(&priv->lock); + return ret; +} + +/* + * Store the new hardware address in dev->dev_addr, and update the MAC. + */ +static int enc28j60_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 enc28j60_set_hw_macaddr(dev); +} + +/* + * Debug routine to dump useful register contents + */ +static void enc28j60_dump_regs(struct enc28j60_net *priv, const char *msg) +{ + mutex_lock(&priv->lock); + printk(KERN_DEBUG DRV_NAME " %s\n" + "HwRevID: 0x%02x\n" + "Cntrl: ECON1 ECON2 ESTAT EIR EIE\n" + " 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n" + "MAC : MACON1 MACON3 MACON4\n" + " 0x%02x 0x%02x 0x%02x\n" + "Rx : ERXST ERXND ERXWRPT ERXRDPT ERXFCON EPKTCNT MAMXFL\n" + " 0x%04x 0x%04x 0x%04x 0x%04x " + "0x%02x 0x%02x 0x%04x\n" + "Tx : ETXST ETXND MACLCON1 MACLCON2 MAPHSUP\n" + " 0x%04x 0x%04x 0x%02x 0x%02x 0x%02x\n", + msg, nolock_regb_read(priv, EREVID), + nolock_regb_read(priv, ECON1), nolock_regb_read(priv, ECON2), + nolock_regb_read(priv, ESTAT), nolock_regb_read(priv, EIR), + nolock_regb_read(priv, EIE), nolock_regb_read(priv, MACON1), + nolock_regb_read(priv, MACON3), nolock_regb_read(priv, MACON4), + nolock_regw_read(priv, ERXSTL), nolock_regw_read(priv, ERXNDL), + nolock_regw_read(priv, ERXWRPTL), + nolock_regw_read(priv, ERXRDPTL), + nolock_regb_read(priv, ERXFCON), + nolock_regb_read(priv, EPKTCNT), + nolock_regw_read(priv, MAMXFLL), nolock_regw_read(priv, ETXSTL), + nolock_regw_read(priv, ETXNDL), + nolock_regb_read(priv, MACLCON1), + nolock_regb_read(priv, MACLCON2), + nolock_regb_read(priv, MAPHSUP)); + mutex_unlock(&priv->lock); +} + +/* + * ERXRDPT need to be set always at odd addresses, refer to errata datasheet + */ +static u16 erxrdpt_workaround(u16 next_packet_ptr, u16 start, u16 end) +{ + u16 erxrdpt; + + if ((next_packet_ptr - 1 < start) || (next_packet_ptr - 1 > end)) + erxrdpt = end; + else + erxrdpt = next_packet_ptr - 1; + + return erxrdpt; +} + +/* + * Calculate wrap around when reading beyond the end of the RX buffer + */ +static u16 rx_packet_start(u16 ptr) +{ + if (ptr + RSV_SIZE > RXEND_INIT) + return (ptr + RSV_SIZE) - (RXEND_INIT - RXSTART_INIT + 1); + else + return ptr + RSV_SIZE; +} + +static void nolock_rxfifo_init(struct enc28j60_net *priv, u16 start, u16 end) +{ + u16 erxrdpt; + + if (start > 0x1FFF || end > 0x1FFF || start > end) { + if (netif_msg_drv(priv)) + printk(KERN_ERR DRV_NAME ": %s(%d, %d) RXFIFO " + "bad parameters!\n", __func__, start, end); + return; + } + /* set receive buffer start + end */ + priv->next_pk_ptr = start; + nolock_regw_write(priv, ERXSTL, start); + erxrdpt = erxrdpt_workaround(priv->next_pk_ptr, start, end); + nolock_regw_write(priv, ERXRDPTL, erxrdpt); + nolock_regw_write(priv, ERXNDL, end); +} + +static void nolock_txfifo_init(struct enc28j60_net *priv, u16 start, u16 end) +{ + if (start > 0x1FFF || end > 0x1FFF || start > end) { + if (netif_msg_drv(priv)) + printk(KERN_ERR DRV_NAME ": %s(%d, %d) TXFIFO " + "bad parameters!\n", __func__, start, end); + return; + } + /* set transmit buffer start + end */ + nolock_regw_write(priv, ETXSTL, start); + nolock_regw_write(priv, ETXNDL, end); +} + +/* + * Low power mode shrinks power consumption about 100x, so we'd like + * the chip to be in that mode whenever it's inactive. (However, we + * can't stay in lowpower mode during suspend with WOL active.) + */ +static void enc28j60_lowpower(struct enc28j60_net *priv, bool is_low) +{ + if (netif_msg_drv(priv)) + dev_dbg(&priv->spi->dev, "%s power...\n", + is_low ? "low" : "high"); + + mutex_lock(&priv->lock); + if (is_low) { + nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); + poll_ready(priv, ESTAT, ESTAT_RXBUSY, 0); + poll_ready(priv, ECON1, ECON1_TXRTS, 0); + /* ECON2_VRPS was set during initialization */ + nolock_reg_bfset(priv, ECON2, ECON2_PWRSV); + } else { + nolock_reg_bfclr(priv, ECON2, ECON2_PWRSV); + poll_ready(priv, ESTAT, ESTAT_CLKRDY, ESTAT_CLKRDY); + /* caller sets ECON1_RXEN */ + } + mutex_unlock(&priv->lock); +} + +static int enc28j60_hw_init(struct enc28j60_net *priv) +{ + u8 reg; + + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() - %s\n", __func__, + priv->full_duplex ? "FullDuplex" : "HalfDuplex"); + + mutex_lock(&priv->lock); + /* first reset the chip */ + enc28j60_soft_reset(priv); + /* Clear ECON1 */ + spi_write_op(priv, ENC28J60_WRITE_CTRL_REG, ECON1, 0x00); + priv->bank = 0; + priv->hw_enable = false; + priv->tx_retry_count = 0; + priv->max_pk_counter = 0; + priv->rxfilter = RXFILTER_NORMAL; + /* enable address auto increment and voltage regulator powersave */ + nolock_regb_write(priv, ECON2, ECON2_AUTOINC | ECON2_VRPS); + + nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT); + nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT); + mutex_unlock(&priv->lock); + + /* + * Check the RevID. + * If it's 0x00 or 0xFF probably the enc28j60 is not mounted or + * damaged + */ + reg = locked_regb_read(priv, EREVID); + if (netif_msg_drv(priv)) + printk(KERN_INFO DRV_NAME ": chip RevID: 0x%02x\n", reg); + if (reg == 0x00 || reg == 0xff) { + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() Invalid RevId %d\n", + __func__, reg); + return 0; + } + + /* default filter mode: (unicast OR broadcast) AND crc valid */ + locked_regb_write(priv, ERXFCON, + ERXFCON_UCEN | ERXFCON_CRCEN | ERXFCON_BCEN); + + /* enable MAC receive */ + locked_regb_write(priv, MACON1, + MACON1_MARXEN | MACON1_TXPAUS | MACON1_RXPAUS); + /* enable automatic padding and CRC operations */ + if (priv->full_duplex) { + locked_regb_write(priv, MACON3, + MACON3_PADCFG0 | MACON3_TXCRCEN | + MACON3_FRMLNEN | MACON3_FULDPX); + /* set inter-frame gap (non-back-to-back) */ + locked_regb_write(priv, MAIPGL, 0x12); + /* set inter-frame gap (back-to-back) */ + locked_regb_write(priv, MABBIPG, 0x15); + } else { + locked_regb_write(priv, MACON3, + MACON3_PADCFG0 | MACON3_TXCRCEN | + MACON3_FRMLNEN); + locked_regb_write(priv, MACON4, 1 << 6); /* DEFER bit */ + /* set inter-frame gap (non-back-to-back) */ + locked_regw_write(priv, MAIPGL, 0x0C12); + /* set inter-frame gap (back-to-back) */ + locked_regb_write(priv, MABBIPG, 0x12); + } + /* + * MACLCON1 (default) + * MACLCON2 (default) + * Set the maximum packet size which the controller will accept + */ + locked_regw_write(priv, MAMXFLL, MAX_FRAMELEN); + + /* Configure LEDs */ + if (!enc28j60_phy_write(priv, PHLCON, ENC28J60_LAMPS_MODE)) + return 0; + + if (priv->full_duplex) { + if (!enc28j60_phy_write(priv, PHCON1, PHCON1_PDPXMD)) + return 0; + if (!enc28j60_phy_write(priv, PHCON2, 0x00)) + return 0; + } else { + if (!enc28j60_phy_write(priv, PHCON1, 0x00)) + return 0; + if (!enc28j60_phy_write(priv, PHCON2, PHCON2_HDLDIS)) + return 0; + } + if (netif_msg_hw(priv)) + enc28j60_dump_regs(priv, "Hw initialized."); + + return 1; +} + +static void enc28j60_hw_enable(struct enc28j60_net *priv) +{ + /* enable interrupts */ + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enabling interrupts.\n", + __func__); + + enc28j60_phy_write(priv, PHIE, PHIE_PGEIE | PHIE_PLNKIE); + + mutex_lock(&priv->lock); + nolock_reg_bfclr(priv, EIR, EIR_DMAIF | EIR_LINKIF | + EIR_TXIF | EIR_TXERIF | EIR_RXERIF | EIR_PKTIF); + nolock_regb_write(priv, EIE, EIE_INTIE | EIE_PKTIE | EIE_LINKIE | + EIE_TXIE | EIE_TXERIE | EIE_RXERIE); + + /* enable receive logic */ + nolock_reg_bfset(priv, ECON1, ECON1_RXEN); + priv->hw_enable = true; + mutex_unlock(&priv->lock); +} + +static void enc28j60_hw_disable(struct enc28j60_net *priv) +{ + mutex_lock(&priv->lock); + /* disable interrutps and packet reception */ + nolock_regb_write(priv, EIE, 0x00); + nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); + priv->hw_enable = false; + mutex_unlock(&priv->lock); +} + +static int +enc28j60_setlink(struct net_device *ndev, u8 autoneg, u16 speed, u8 duplex) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + int ret = 0; + + if (!priv->hw_enable) { + /* link is in low power mode now; duplex setting + * will take effect on next enc28j60_hw_init(). + */ + if (autoneg == AUTONEG_DISABLE && speed == SPEED_10) + priv->full_duplex = (duplex == DUPLEX_FULL); + else { + if (netif_msg_link(priv)) + dev_warn(&ndev->dev, + "unsupported link setting\n"); + ret = -EOPNOTSUPP; + } + } else { + if (netif_msg_link(priv)) + dev_warn(&ndev->dev, "Warning: hw must be disabled " + "to set link mode\n"); + ret = -EBUSY; + } + return ret; +} + +/* + * Read the Transmit Status Vector + */ +static void enc28j60_read_tsv(struct enc28j60_net *priv, u8 tsv[TSV_SIZE]) +{ + int endptr; + + endptr = locked_regw_read(priv, ETXNDL); + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME ": reading TSV at addr:0x%04x\n", + endptr + 1); + enc28j60_mem_read(priv, endptr + 1, TSV_SIZE, tsv); +} + +static void enc28j60_dump_tsv(struct enc28j60_net *priv, const char *msg, + u8 tsv[TSV_SIZE]) +{ + u16 tmp1, tmp2; + + printk(KERN_DEBUG DRV_NAME ": %s - TSV:\n", msg); + tmp1 = tsv[1]; + tmp1 <<= 8; + tmp1 |= tsv[0]; + + tmp2 = tsv[5]; + tmp2 <<= 8; + tmp2 |= tsv[4]; + + printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, CollisionCount: %d," + " TotByteOnWire: %d\n", tmp1, tsv[2] & 0x0f, tmp2); + printk(KERN_DEBUG DRV_NAME ": TxDone: %d, CRCErr:%d, LenChkErr: %d," + " LenOutOfRange: %d\n", TSV_GETBIT(tsv, TSV_TXDONE), + TSV_GETBIT(tsv, TSV_TXCRCERROR), + TSV_GETBIT(tsv, TSV_TXLENCHKERROR), + TSV_GETBIT(tsv, TSV_TXLENOUTOFRANGE)); + printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, " + "PacketDefer: %d, ExDefer: %d\n", + TSV_GETBIT(tsv, TSV_TXMULTICAST), + TSV_GETBIT(tsv, TSV_TXBROADCAST), + TSV_GETBIT(tsv, TSV_TXPACKETDEFER), + TSV_GETBIT(tsv, TSV_TXEXDEFER)); + printk(KERN_DEBUG DRV_NAME ": ExCollision: %d, LateCollision: %d, " + "Giant: %d, Underrun: %d\n", + TSV_GETBIT(tsv, TSV_TXEXCOLLISION), + TSV_GETBIT(tsv, TSV_TXLATECOLLISION), + TSV_GETBIT(tsv, TSV_TXGIANT), TSV_GETBIT(tsv, TSV_TXUNDERRUN)); + printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d, " + "BackPressApp: %d, VLanTagFrame: %d\n", + TSV_GETBIT(tsv, TSV_TXCONTROLFRAME), + TSV_GETBIT(tsv, TSV_TXPAUSEFRAME), + TSV_GETBIT(tsv, TSV_BACKPRESSUREAPP), + TSV_GETBIT(tsv, TSV_TXVLANTAGFRAME)); +} + +/* + * Receive Status vector + */ +static void enc28j60_dump_rsv(struct enc28j60_net *priv, const char *msg, + u16 pk_ptr, int len, u16 sts) +{ + printk(KERN_DEBUG DRV_NAME ": %s - NextPk: 0x%04x - RSV:\n", + msg, pk_ptr); + printk(KERN_DEBUG DRV_NAME ": ByteCount: %d, DribbleNibble: %d\n", len, + RSV_GETBIT(sts, RSV_DRIBBLENIBBLE)); + printk(KERN_DEBUG DRV_NAME ": RxOK: %d, CRCErr:%d, LenChkErr: %d," + " LenOutOfRange: %d\n", RSV_GETBIT(sts, RSV_RXOK), + RSV_GETBIT(sts, RSV_CRCERROR), + RSV_GETBIT(sts, RSV_LENCHECKERR), + RSV_GETBIT(sts, RSV_LENOUTOFRANGE)); + printk(KERN_DEBUG DRV_NAME ": Multicast: %d, Broadcast: %d, " + "LongDropEvent: %d, CarrierEvent: %d\n", + RSV_GETBIT(sts, RSV_RXMULTICAST), + RSV_GETBIT(sts, RSV_RXBROADCAST), + RSV_GETBIT(sts, RSV_RXLONGEVDROPEV), + RSV_GETBIT(sts, RSV_CARRIEREV)); + printk(KERN_DEBUG DRV_NAME ": ControlFrame: %d, PauseFrame: %d," + " UnknownOp: %d, VLanTagFrame: %d\n", + RSV_GETBIT(sts, RSV_RXCONTROLFRAME), + RSV_GETBIT(sts, RSV_RXPAUSEFRAME), + RSV_GETBIT(sts, RSV_RXUNKNOWNOPCODE), + RSV_GETBIT(sts, RSV_RXTYPEVLAN)); +} + +static void dump_packet(const char *msg, int len, const char *data) +{ + printk(KERN_DEBUG DRV_NAME ": %s - packet len:%d\n", msg, len); + print_hex_dump(KERN_DEBUG, "pk data: ", DUMP_PREFIX_OFFSET, 16, 1, + data, len, true); +} + +/* + * Hardware receive function. + * Read the buffer memory, update the FIFO pointer to free the buffer, + * check the status vector and decrement the packet counter. + */ +static void enc28j60_hw_rx(struct net_device *ndev) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + struct sk_buff *skb = NULL; + u16 erxrdpt, next_packet, rxstat; + u8 rsv[RSV_SIZE]; + int len; + + if (netif_msg_rx_status(priv)) + printk(KERN_DEBUG DRV_NAME ": RX pk_addr:0x%04x\n", + priv->next_pk_ptr); + + if (unlikely(priv->next_pk_ptr > RXEND_INIT)) { + if (netif_msg_rx_err(priv)) + dev_err(&ndev->dev, + "%s() Invalid packet address!! 0x%04x\n", + __func__, priv->next_pk_ptr); + /* packet address corrupted: reset RX logic */ + mutex_lock(&priv->lock); + nolock_reg_bfclr(priv, ECON1, ECON1_RXEN); + nolock_reg_bfset(priv, ECON1, ECON1_RXRST); + nolock_reg_bfclr(priv, ECON1, ECON1_RXRST); + nolock_rxfifo_init(priv, RXSTART_INIT, RXEND_INIT); + nolock_reg_bfclr(priv, EIR, EIR_RXERIF); + nolock_reg_bfset(priv, ECON1, ECON1_RXEN); + mutex_unlock(&priv->lock); + ndev->stats.rx_errors++; + return; + } + /* Read next packet pointer and rx status vector */ + enc28j60_mem_read(priv, priv->next_pk_ptr, sizeof(rsv), rsv); + + next_packet = rsv[1]; + next_packet <<= 8; + next_packet |= rsv[0]; + + len = rsv[3]; + len <<= 8; + len |= rsv[2]; + + rxstat = rsv[5]; + rxstat <<= 8; + rxstat |= rsv[4]; + + if (netif_msg_rx_status(priv)) + enc28j60_dump_rsv(priv, __func__, next_packet, len, rxstat); + + if (!RSV_GETBIT(rxstat, RSV_RXOK) || len > MAX_FRAMELEN) { + if (netif_msg_rx_err(priv)) + dev_err(&ndev->dev, "Rx Error (%04x)\n", rxstat); + ndev->stats.rx_errors++; + if (RSV_GETBIT(rxstat, RSV_CRCERROR)) + ndev->stats.rx_crc_errors++; + if (RSV_GETBIT(rxstat, RSV_LENCHECKERR)) + ndev->stats.rx_frame_errors++; + if (len > MAX_FRAMELEN) + ndev->stats.rx_over_errors++; + } else { + skb = dev_alloc_skb(len + NET_IP_ALIGN); + if (!skb) { + if (netif_msg_rx_err(priv)) + dev_err(&ndev->dev, + "out of memory for Rx'd frame\n"); + ndev->stats.rx_dropped++; + } else { + skb->dev = ndev; + skb_reserve(skb, NET_IP_ALIGN); + /* copy the packet from the receive buffer */ + enc28j60_mem_read(priv, + rx_packet_start(priv->next_pk_ptr), + len, skb_put(skb, len)); + if (netif_msg_pktdata(priv)) + dump_packet(__func__, skb->len, skb->data); + skb->protocol = eth_type_trans(skb, ndev); + /* update statistics */ + ndev->stats.rx_packets++; + ndev->stats.rx_bytes += len; + netif_rx_ni(skb); + } + } + /* + * Move the RX read pointer to the start of the next + * received packet. + * This frees the memory we just read out + */ + erxrdpt = erxrdpt_workaround(next_packet, RXSTART_INIT, RXEND_INIT); + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT:0x%04x\n", + __func__, erxrdpt); + + mutex_lock(&priv->lock); + nolock_regw_write(priv, ERXRDPTL, erxrdpt); +#ifdef CONFIG_ENC28J60_WRITEVERIFY + if (netif_msg_drv(priv)) { + u16 reg; + reg = nolock_regw_read(priv, ERXRDPTL); + if (reg != erxrdpt) + printk(KERN_DEBUG DRV_NAME ": %s() ERXRDPT verify " + "error (0x%04x - 0x%04x)\n", __func__, + reg, erxrdpt); + } +#endif + priv->next_pk_ptr = next_packet; + /* we are done with this packet, decrement the packet counter */ + nolock_reg_bfset(priv, ECON2, ECON2_PKTDEC); + mutex_unlock(&priv->lock); +} + +/* + * Calculate free space in RxFIFO + */ +static int enc28j60_get_free_rxfifo(struct enc28j60_net *priv) +{ + int epkcnt, erxst, erxnd, erxwr, erxrd; + int free_space; + + mutex_lock(&priv->lock); + epkcnt = nolock_regb_read(priv, EPKTCNT); + if (epkcnt >= 255) + free_space = -1; + else { + erxst = nolock_regw_read(priv, ERXSTL); + erxnd = nolock_regw_read(priv, ERXNDL); + erxwr = nolock_regw_read(priv, ERXWRPTL); + erxrd = nolock_regw_read(priv, ERXRDPTL); + + if (erxwr > erxrd) + free_space = (erxnd - erxst) - (erxwr - erxrd); + else if (erxwr == erxrd) + free_space = (erxnd - erxst); + else + free_space = erxrd - erxwr - 1; + } + mutex_unlock(&priv->lock); + if (netif_msg_rx_status(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() free_space = %d\n", + __func__, free_space); + return free_space; +} + +/* + * Access the PHY to determine link status + */ +static void enc28j60_check_link_status(struct net_device *ndev) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + u16 reg; + int duplex; + + reg = enc28j60_phy_read(priv, PHSTAT2); + if (netif_msg_hw(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() PHSTAT1: %04x, " + "PHSTAT2: %04x\n", __func__, + enc28j60_phy_read(priv, PHSTAT1), reg); + duplex = reg & PHSTAT2_DPXSTAT; + + if (reg & PHSTAT2_LSTAT) { + netif_carrier_on(ndev); + if (netif_msg_ifup(priv)) + dev_info(&ndev->dev, "link up - %s\n", + duplex ? "Full duplex" : "Half duplex"); + } else { + if (netif_msg_ifdown(priv)) + dev_info(&ndev->dev, "link down\n"); + netif_carrier_off(ndev); + } +} + +static void enc28j60_tx_clear(struct net_device *ndev, bool err) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + + if (err) + ndev->stats.tx_errors++; + else + ndev->stats.tx_packets++; + + if (priv->tx_skb) { + if (!err) + ndev->stats.tx_bytes += priv->tx_skb->len; + dev_kfree_skb(priv->tx_skb); + priv->tx_skb = NULL; + } + locked_reg_bfclr(priv, ECON1, ECON1_TXRTS); + netif_wake_queue(ndev); +} + +/* + * RX handler + * ignore PKTIF because is unreliable! (look at the errata datasheet) + * check EPKTCNT is the suggested workaround. + * We don't need to clear interrupt flag, automatically done when + * enc28j60_hw_rx() decrements the packet counter. + * Returns how many packet processed. + */ +static int enc28j60_rx_interrupt(struct net_device *ndev) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + int pk_counter, ret; + + pk_counter = locked_regb_read(priv, EPKTCNT); + if (pk_counter && netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME ": intRX, pk_cnt: %d\n", pk_counter); + if (pk_counter > priv->max_pk_counter) { + /* update statistics */ + priv->max_pk_counter = pk_counter; + if (netif_msg_rx_status(priv) && priv->max_pk_counter > 1) + printk(KERN_DEBUG DRV_NAME ": RX max_pk_cnt: %d\n", + priv->max_pk_counter); + } + ret = pk_counter; + while (pk_counter-- > 0) + enc28j60_hw_rx(ndev); + + return ret; +} + +static void enc28j60_irq_work_handler(struct work_struct *work) +{ + struct enc28j60_net *priv = + container_of(work, struct enc28j60_net, irq_work); + struct net_device *ndev = priv->netdev; + int intflags, loop; + + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); + /* disable further interrupts */ + locked_reg_bfclr(priv, EIE, EIE_INTIE); + + do { + loop = 0; + intflags = locked_regb_read(priv, EIR); + /* DMA interrupt handler (not currently used) */ + if ((intflags & EIR_DMAIF) != 0) { + loop++; + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME + ": intDMA(%d)\n", loop); + locked_reg_bfclr(priv, EIR, EIR_DMAIF); + } + /* LINK changed handler */ + if ((intflags & EIR_LINKIF) != 0) { + loop++; + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME + ": intLINK(%d)\n", loop); + enc28j60_check_link_status(ndev); + /* read PHIR to clear the flag */ + enc28j60_phy_read(priv, PHIR); + } + /* TX complete handler */ + if ((intflags & EIR_TXIF) != 0) { + bool err = false; + loop++; + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME + ": intTX(%d)\n", loop); + priv->tx_retry_count = 0; + if (locked_regb_read(priv, ESTAT) & ESTAT_TXABRT) { + if (netif_msg_tx_err(priv)) + dev_err(&ndev->dev, + "Tx Error (aborted)\n"); + err = true; + } + if (netif_msg_tx_done(priv)) { + u8 tsv[TSV_SIZE]; + enc28j60_read_tsv(priv, tsv); + enc28j60_dump_tsv(priv, "Tx Done", tsv); + } + enc28j60_tx_clear(ndev, err); + locked_reg_bfclr(priv, EIR, EIR_TXIF); + } + /* TX Error handler */ + if ((intflags & EIR_TXERIF) != 0) { + u8 tsv[TSV_SIZE]; + + loop++; + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME + ": intTXErr(%d)\n", loop); + locked_reg_bfclr(priv, ECON1, ECON1_TXRTS); + enc28j60_read_tsv(priv, tsv); + if (netif_msg_tx_err(priv)) + enc28j60_dump_tsv(priv, "Tx Error", tsv); + /* Reset TX logic */ + mutex_lock(&priv->lock); + nolock_reg_bfset(priv, ECON1, ECON1_TXRST); + nolock_reg_bfclr(priv, ECON1, ECON1_TXRST); + nolock_txfifo_init(priv, TXSTART_INIT, TXEND_INIT); + mutex_unlock(&priv->lock); + /* Transmit Late collision check for retransmit */ + if (TSV_GETBIT(tsv, TSV_TXLATECOLLISION)) { + if (netif_msg_tx_err(priv)) + printk(KERN_DEBUG DRV_NAME + ": LateCollision TXErr (%d)\n", + priv->tx_retry_count); + if (priv->tx_retry_count++ < MAX_TX_RETRYCOUNT) + locked_reg_bfset(priv, ECON1, + ECON1_TXRTS); + else + enc28j60_tx_clear(ndev, true); + } else + enc28j60_tx_clear(ndev, true); + locked_reg_bfclr(priv, EIR, EIR_TXERIF); + } + /* RX Error handler */ + if ((intflags & EIR_RXERIF) != 0) { + loop++; + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME + ": intRXErr(%d)\n", loop); + /* Check free FIFO space to flag RX overrun */ + if (enc28j60_get_free_rxfifo(priv) <= 0) { + if (netif_msg_rx_err(priv)) + printk(KERN_DEBUG DRV_NAME + ": RX Overrun\n"); + ndev->stats.rx_dropped++; + } + locked_reg_bfclr(priv, EIR, EIR_RXERIF); + } + /* RX handler */ + if (enc28j60_rx_interrupt(ndev)) + loop++; + } while (loop); + + /* re-enable interrupts */ + locked_reg_bfset(priv, EIE, EIE_INTIE); + if (netif_msg_intr(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() exit\n", __func__); +} + +/* + * Hardware transmit function. + * Fill the buffer memory and send the contents of the transmit buffer + * onto the network + */ +static void enc28j60_hw_tx(struct enc28j60_net *priv) +{ + if (netif_msg_tx_queued(priv)) + printk(KERN_DEBUG DRV_NAME + ": Tx Packet Len:%d\n", priv->tx_skb->len); + + if (netif_msg_pktdata(priv)) + dump_packet(__func__, + priv->tx_skb->len, priv->tx_skb->data); + enc28j60_packet_write(priv, priv->tx_skb->len, priv->tx_skb->data); + +#ifdef CONFIG_ENC28J60_WRITEVERIFY + /* readback and verify written data */ + if (netif_msg_drv(priv)) { + int test_len, k; + u8 test_buf[64]; /* limit the test to the first 64 bytes */ + int okflag; + + test_len = priv->tx_skb->len; + if (test_len > sizeof(test_buf)) + test_len = sizeof(test_buf); + + /* + 1 to skip control byte */ + enc28j60_mem_read(priv, TXSTART_INIT + 1, test_len, test_buf); + okflag = 1; + for (k = 0; k < test_len; k++) { + if (priv->tx_skb->data[k] != test_buf[k]) { + printk(KERN_DEBUG DRV_NAME + ": Error, %d location differ: " + "0x%02x-0x%02x\n", k, + priv->tx_skb->data[k], test_buf[k]); + okflag = 0; + } + } + if (!okflag) + printk(KERN_DEBUG DRV_NAME ": Tx write buffer, " + "verify ERROR!\n"); + } +#endif + /* set TX request flag */ + locked_reg_bfset(priv, ECON1, ECON1_TXRTS); +} + +static netdev_tx_t enc28j60_send_packet(struct sk_buff *skb, + struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + + if (netif_msg_tx_queued(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); + + /* If some error occurs while trying to transmit this + * packet, you should return '1' from this function. + * In such a case you _may not_ do anything to the + * SKB, it is still owned by the network queueing + * layer when an error is returned. This means you + * may not modify any SKB fields, you may not free + * the SKB, etc. + */ + netif_stop_queue(dev); + + /* Remember the skb for deferred processing */ + priv->tx_skb = skb; + schedule_work(&priv->tx_work); + + return NETDEV_TX_OK; +} + +static void enc28j60_tx_work_handler(struct work_struct *work) +{ + struct enc28j60_net *priv = + container_of(work, struct enc28j60_net, tx_work); + + /* actual delivery of data */ + enc28j60_hw_tx(priv); +} + +static irqreturn_t enc28j60_irq(int irq, void *dev_id) +{ + struct enc28j60_net *priv = dev_id; + + /* + * Can't do anything in interrupt context because we need to + * block (spi_sync() is blocking) so fire of the interrupt + * handling workqueue. + * Remember that we access enc28j60 registers through SPI bus + * via spi_sync() call. + */ + schedule_work(&priv->irq_work); + + return IRQ_HANDLED; +} + +static void enc28j60_tx_timeout(struct net_device *ndev) +{ + struct enc28j60_net *priv = netdev_priv(ndev); + + if (netif_msg_timer(priv)) + dev_err(&ndev->dev, DRV_NAME " tx timeout\n"); + + ndev->stats.tx_errors++; + /* can't restart safely under softirq */ + schedule_work(&priv->restart_work); +} + +/* + * Open/initialize the board. This is called (in the current kernel) + * sometime after booting when the 'ifconfig' program is run. + * + * This routine should set everything up anew at each open, even + * registers that "should" only need to be set once at boot, so that + * there is non-reboot way to recover if something goes wrong. + */ +static int enc28j60_net_open(struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); + + if (!is_valid_ether_addr(dev->dev_addr)) { + if (netif_msg_ifup(priv)) + dev_err(&dev->dev, "invalid MAC address %pM\n", + dev->dev_addr); + return -EADDRNOTAVAIL; + } + /* Reset the hardware here (and take it out of low power mode) */ + enc28j60_lowpower(priv, false); + enc28j60_hw_disable(priv); + if (!enc28j60_hw_init(priv)) { + if (netif_msg_ifup(priv)) + dev_err(&dev->dev, "hw_reset() failed\n"); + return -EINVAL; + } + /* Update the MAC address (in case user has changed it) */ + enc28j60_set_hw_macaddr(dev); + /* Enable interrupts */ + enc28j60_hw_enable(priv); + /* check link status */ + enc28j60_check_link_status(dev); + /* We are now ready to accept transmit requests from + * the queueing layer of the networking. + */ + netif_start_queue(dev); + + return 0; +} + +/* The inverse routine to net_open(). */ +static int enc28j60_net_close(struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": %s() enter\n", __func__); + + enc28j60_hw_disable(priv); + enc28j60_lowpower(priv, true); + netif_stop_queue(dev); + + return 0; +} + +/* + * Set or clear the multicast filter for this adapter + * num_addrs == -1 Promiscuous mode, receive all packets + * num_addrs == 0 Normal mode, filter out multicast packets + * num_addrs > 0 Multicast mode, receive normal and MC packets + */ +static void enc28j60_set_multicast_list(struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + int oldfilter = priv->rxfilter; + + if (dev->flags & IFF_PROMISC) { + if (netif_msg_link(priv)) + dev_info(&dev->dev, "promiscuous mode\n"); + priv->rxfilter = RXFILTER_PROMISC; + } else if ((dev->flags & IFF_ALLMULTI) || !netdev_mc_empty(dev)) { + if (netif_msg_link(priv)) + dev_info(&dev->dev, "%smulticast mode\n", + (dev->flags & IFF_ALLMULTI) ? "all-" : ""); + priv->rxfilter = RXFILTER_MULTI; + } else { + if (netif_msg_link(priv)) + dev_info(&dev->dev, "normal mode\n"); + priv->rxfilter = RXFILTER_NORMAL; + } + + if (oldfilter != priv->rxfilter) + schedule_work(&priv->setrx_work); +} + +static void enc28j60_setrx_work_handler(struct work_struct *work) +{ + struct enc28j60_net *priv = + container_of(work, struct enc28j60_net, setrx_work); + + if (priv->rxfilter == RXFILTER_PROMISC) { + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": promiscuous mode\n"); + locked_regb_write(priv, ERXFCON, 0x00); + } else if (priv->rxfilter == RXFILTER_MULTI) { + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": multicast mode\n"); + locked_regb_write(priv, ERXFCON, + ERXFCON_UCEN | ERXFCON_CRCEN | + ERXFCON_BCEN | ERXFCON_MCEN); + } else { + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": normal mode\n"); + locked_regb_write(priv, ERXFCON, + ERXFCON_UCEN | ERXFCON_CRCEN | + ERXFCON_BCEN); + } +} + +static void enc28j60_restart_work_handler(struct work_struct *work) +{ + struct enc28j60_net *priv = + container_of(work, struct enc28j60_net, restart_work); + struct net_device *ndev = priv->netdev; + int ret; + + rtnl_lock(); + if (netif_running(ndev)) { + enc28j60_net_close(ndev); + ret = enc28j60_net_open(ndev); + if (unlikely(ret)) { + dev_info(&ndev->dev, " could not restart %d\n", ret); + dev_close(ndev); + } + } + rtnl_unlock(); +} + +/* ......................... ETHTOOL SUPPORT ........................... */ + +static void +enc28j60_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 +enc28j60_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct enc28j60_net *priv = netdev_priv(dev); + + cmd->transceiver = XCVR_INTERNAL; + cmd->supported = SUPPORTED_10baseT_Half + | SUPPORTED_10baseT_Full + | SUPPORTED_TP; + ethtool_cmd_speed_set(cmd, SPEED_10); + cmd->duplex = priv->full_duplex ? DUPLEX_FULL : DUPLEX_HALF; + cmd->port = PORT_TP; + cmd->autoneg = AUTONEG_DISABLE; + + return 0; +} + +static int +enc28j60_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + return enc28j60_setlink(dev, cmd->autoneg, + ethtool_cmd_speed(cmd), cmd->duplex); +} + +static u32 enc28j60_get_msglevel(struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + return priv->msg_enable; +} + +static void enc28j60_set_msglevel(struct net_device *dev, u32 val) +{ + struct enc28j60_net *priv = netdev_priv(dev); + priv->msg_enable = val; +} + +static const struct ethtool_ops enc28j60_ethtool_ops = { + .get_settings = enc28j60_get_settings, + .set_settings = enc28j60_set_settings, + .get_drvinfo = enc28j60_get_drvinfo, + .get_msglevel = enc28j60_get_msglevel, + .set_msglevel = enc28j60_set_msglevel, +}; + +static int enc28j60_chipset_init(struct net_device *dev) +{ + struct enc28j60_net *priv = netdev_priv(dev); + + return enc28j60_hw_init(priv); +} + +static const struct net_device_ops enc28j60_netdev_ops = { + .ndo_open = enc28j60_net_open, + .ndo_stop = enc28j60_net_close, + .ndo_start_xmit = enc28j60_send_packet, + .ndo_set_multicast_list = enc28j60_set_multicast_list, + .ndo_set_mac_address = enc28j60_set_mac_address, + .ndo_tx_timeout = enc28j60_tx_timeout, + .ndo_change_mtu = eth_change_mtu, + .ndo_validate_addr = eth_validate_addr, +}; + +static int __devinit enc28j60_probe(struct spi_device *spi) +{ + struct net_device *dev; + struct enc28j60_net *priv; + int ret = 0; + + if (netif_msg_drv(&debug)) + dev_info(&spi->dev, DRV_NAME " Ethernet driver %s loaded\n", + DRV_VERSION); + + dev = alloc_etherdev(sizeof(struct enc28j60_net)); + if (!dev) { + if (netif_msg_drv(&debug)) + dev_err(&spi->dev, DRV_NAME + ": unable to alloc new ethernet\n"); + ret = -ENOMEM; + goto error_alloc; + } + priv = netdev_priv(dev); + + priv->netdev = dev; /* priv to netdev reference */ + priv->spi = spi; /* priv to spi reference */ + priv->msg_enable = netif_msg_init(debug.msg_enable, + ENC28J60_MSG_DEFAULT); + mutex_init(&priv->lock); + INIT_WORK(&priv->tx_work, enc28j60_tx_work_handler); + INIT_WORK(&priv->setrx_work, enc28j60_setrx_work_handler); + INIT_WORK(&priv->irq_work, enc28j60_irq_work_handler); + INIT_WORK(&priv->restart_work, enc28j60_restart_work_handler); + dev_set_drvdata(&spi->dev, priv); /* spi to priv reference */ + SET_NETDEV_DEV(dev, &spi->dev); + + if (!enc28j60_chipset_init(dev)) { + if (netif_msg_probe(priv)) + dev_info(&spi->dev, DRV_NAME " chip not found\n"); + ret = -EIO; + goto error_irq; + } + random_ether_addr(dev->dev_addr); + enc28j60_set_hw_macaddr(dev); + + /* Board setup must set the relevant edge trigger type; + * level triggers won't currently work. + */ + ret = request_irq(spi->irq, enc28j60_irq, 0, DRV_NAME, priv); + if (ret < 0) { + if (netif_msg_probe(priv)) + dev_err(&spi->dev, DRV_NAME ": request irq %d failed " + "(ret = %d)\n", spi->irq, ret); + goto error_irq; + } + + dev->if_port = IF_PORT_10BASET; + dev->irq = spi->irq; + dev->netdev_ops = &enc28j60_netdev_ops; + dev->watchdog_timeo = TX_TIMEOUT; + SET_ETHTOOL_OPS(dev, &enc28j60_ethtool_ops); + + enc28j60_lowpower(priv, true); + + ret = register_netdev(dev); + if (ret) { + if (netif_msg_probe(priv)) + dev_err(&spi->dev, "register netdev " DRV_NAME + " failed (ret = %d)\n", ret); + goto error_register; + } + dev_info(&dev->dev, DRV_NAME " driver registered\n"); + + return 0; + +error_register: + free_irq(spi->irq, priv); +error_irq: + free_netdev(dev); +error_alloc: + return ret; +} + +static int __devexit enc28j60_remove(struct spi_device *spi) +{ + struct enc28j60_net *priv = dev_get_drvdata(&spi->dev); + + if (netif_msg_drv(priv)) + printk(KERN_DEBUG DRV_NAME ": remove\n"); + + unregister_netdev(priv->netdev); + free_irq(spi->irq, priv); + free_netdev(priv->netdev); + + return 0; +} + +static struct spi_driver enc28j60_driver = { + .driver = { + .name = DRV_NAME, + .owner = THIS_MODULE, + }, + .probe = enc28j60_probe, + .remove = __devexit_p(enc28j60_remove), +}; + +static int __init enc28j60_init(void) +{ + msec20_to_jiffies = msecs_to_jiffies(20); + + return spi_register_driver(&enc28j60_driver); +} + +module_init(enc28j60_init); + +static void __exit enc28j60_exit(void) +{ + spi_unregister_driver(&enc28j60_driver); +} + +module_exit(enc28j60_exit); + +MODULE_DESCRIPTION(DRV_NAME " ethernet driver"); +MODULE_AUTHOR("Claudio Lanconelli "); +MODULE_LICENSE("GPL"); +module_param_named(debug, debug.msg_enable, int, 0); +MODULE_PARM_DESC(debug, "Debug verbosity level (0=none, ..., ffff=all)"); +MODULE_ALIAS("spi:" DRV_NAME); diff --git a/drivers/net/ethernet/microchip/enc28j60_hw.h b/drivers/net/ethernet/microchip/enc28j60_hw.h new file mode 100644 index 000000000000..25b41de49f0e --- /dev/null +++ b/drivers/net/ethernet/microchip/enc28j60_hw.h @@ -0,0 +1,309 @@ +/* + * enc28j60_hw.h: EDTP FrameThrower style enc28j60 registers + * + * $Id: enc28j60_hw.h,v 1.9 2007/12/14 11:59:16 claudio Exp $ + */ + +#ifndef _ENC28J60_HW_H +#define _ENC28J60_HW_H + +/* + * ENC28J60 Control Registers + * Control register definitions are a combination of address, + * bank number, and Ethernet/MAC/PHY indicator bits. + * - Register address (bits 0-4) + * - Bank number (bits 5-6) + * - MAC/MII indicator (bit 7) + */ +#define ADDR_MASK 0x1F +#define BANK_MASK 0x60 +#define SPRD_MASK 0x80 +/* All-bank registers */ +#define EIE 0x1B +#define EIR 0x1C +#define ESTAT 0x1D +#define ECON2 0x1E +#define ECON1 0x1F +/* Bank 0 registers */ +#define ERDPTL (0x00|0x00) +#define ERDPTH (0x01|0x00) +#define EWRPTL (0x02|0x00) +#define EWRPTH (0x03|0x00) +#define ETXSTL (0x04|0x00) +#define ETXSTH (0x05|0x00) +#define ETXNDL (0x06|0x00) +#define ETXNDH (0x07|0x00) +#define ERXSTL (0x08|0x00) +#define ERXSTH (0x09|0x00) +#define ERXNDL (0x0A|0x00) +#define ERXNDH (0x0B|0x00) +#define ERXRDPTL (0x0C|0x00) +#define ERXRDPTH (0x0D|0x00) +#define ERXWRPTL (0x0E|0x00) +#define ERXWRPTH (0x0F|0x00) +#define EDMASTL (0x10|0x00) +#define EDMASTH (0x11|0x00) +#define EDMANDL (0x12|0x00) +#define EDMANDH (0x13|0x00) +#define EDMADSTL (0x14|0x00) +#define EDMADSTH (0x15|0x00) +#define EDMACSL (0x16|0x00) +#define EDMACSH (0x17|0x00) +/* Bank 1 registers */ +#define EHT0 (0x00|0x20) +#define EHT1 (0x01|0x20) +#define EHT2 (0x02|0x20) +#define EHT3 (0x03|0x20) +#define EHT4 (0x04|0x20) +#define EHT5 (0x05|0x20) +#define EHT6 (0x06|0x20) +#define EHT7 (0x07|0x20) +#define EPMM0 (0x08|0x20) +#define EPMM1 (0x09|0x20) +#define EPMM2 (0x0A|0x20) +#define EPMM3 (0x0B|0x20) +#define EPMM4 (0x0C|0x20) +#define EPMM5 (0x0D|0x20) +#define EPMM6 (0x0E|0x20) +#define EPMM7 (0x0F|0x20) +#define EPMCSL (0x10|0x20) +#define EPMCSH (0x11|0x20) +#define EPMOL (0x14|0x20) +#define EPMOH (0x15|0x20) +#define EWOLIE (0x16|0x20) +#define EWOLIR (0x17|0x20) +#define ERXFCON (0x18|0x20) +#define EPKTCNT (0x19|0x20) +/* Bank 2 registers */ +#define MACON1 (0x00|0x40|SPRD_MASK) +/* #define MACON2 (0x01|0x40|SPRD_MASK) */ +#define MACON3 (0x02|0x40|SPRD_MASK) +#define MACON4 (0x03|0x40|SPRD_MASK) +#define MABBIPG (0x04|0x40|SPRD_MASK) +#define MAIPGL (0x06|0x40|SPRD_MASK) +#define MAIPGH (0x07|0x40|SPRD_MASK) +#define MACLCON1 (0x08|0x40|SPRD_MASK) +#define MACLCON2 (0x09|0x40|SPRD_MASK) +#define MAMXFLL (0x0A|0x40|SPRD_MASK) +#define MAMXFLH (0x0B|0x40|SPRD_MASK) +#define MAPHSUP (0x0D|0x40|SPRD_MASK) +#define MICON (0x11|0x40|SPRD_MASK) +#define MICMD (0x12|0x40|SPRD_MASK) +#define MIREGADR (0x14|0x40|SPRD_MASK) +#define MIWRL (0x16|0x40|SPRD_MASK) +#define MIWRH (0x17|0x40|SPRD_MASK) +#define MIRDL (0x18|0x40|SPRD_MASK) +#define MIRDH (0x19|0x40|SPRD_MASK) +/* Bank 3 registers */ +#define MAADR1 (0x00|0x60|SPRD_MASK) +#define MAADR0 (0x01|0x60|SPRD_MASK) +#define MAADR3 (0x02|0x60|SPRD_MASK) +#define MAADR2 (0x03|0x60|SPRD_MASK) +#define MAADR5 (0x04|0x60|SPRD_MASK) +#define MAADR4 (0x05|0x60|SPRD_MASK) +#define EBSTSD (0x06|0x60) +#define EBSTCON (0x07|0x60) +#define EBSTCSL (0x08|0x60) +#define EBSTCSH (0x09|0x60) +#define MISTAT (0x0A|0x60|SPRD_MASK) +#define EREVID (0x12|0x60) +#define ECOCON (0x15|0x60) +#define EFLOCON (0x17|0x60) +#define EPAUSL (0x18|0x60) +#define EPAUSH (0x19|0x60) +/* PHY registers */ +#define PHCON1 0x00 +#define PHSTAT1 0x01 +#define PHHID1 0x02 +#define PHHID2 0x03 +#define PHCON2 0x10 +#define PHSTAT2 0x11 +#define PHIE 0x12 +#define PHIR 0x13 +#define PHLCON 0x14 + +/* ENC28J60 EIE Register Bit Definitions */ +#define EIE_INTIE 0x80 +#define EIE_PKTIE 0x40 +#define EIE_DMAIE 0x20 +#define EIE_LINKIE 0x10 +#define EIE_TXIE 0x08 +/* #define EIE_WOLIE 0x04 (reserved) */ +#define EIE_TXERIE 0x02 +#define EIE_RXERIE 0x01 +/* ENC28J60 EIR Register Bit Definitions */ +#define EIR_PKTIF 0x40 +#define EIR_DMAIF 0x20 +#define EIR_LINKIF 0x10 +#define EIR_TXIF 0x08 +/* #define EIR_WOLIF 0x04 (reserved) */ +#define EIR_TXERIF 0x02 +#define EIR_RXERIF 0x01 +/* ENC28J60 ESTAT Register Bit Definitions */ +#define ESTAT_INT 0x80 +#define ESTAT_LATECOL 0x10 +#define ESTAT_RXBUSY 0x04 +#define ESTAT_TXABRT 0x02 +#define ESTAT_CLKRDY 0x01 +/* ENC28J60 ECON2 Register Bit Definitions */ +#define ECON2_AUTOINC 0x80 +#define ECON2_PKTDEC 0x40 +#define ECON2_PWRSV 0x20 +#define ECON2_VRPS 0x08 +/* ENC28J60 ECON1 Register Bit Definitions */ +#define ECON1_TXRST 0x80 +#define ECON1_RXRST 0x40 +#define ECON1_DMAST 0x20 +#define ECON1_CSUMEN 0x10 +#define ECON1_TXRTS 0x08 +#define ECON1_RXEN 0x04 +#define ECON1_BSEL1 0x02 +#define ECON1_BSEL0 0x01 +/* ENC28J60 MACON1 Register Bit Definitions */ +#define MACON1_LOOPBK 0x10 +#define MACON1_TXPAUS 0x08 +#define MACON1_RXPAUS 0x04 +#define MACON1_PASSALL 0x02 +#define MACON1_MARXEN 0x01 +/* ENC28J60 MACON2 Register Bit Definitions */ +#define MACON2_MARST 0x80 +#define MACON2_RNDRST 0x40 +#define MACON2_MARXRST 0x08 +#define MACON2_RFUNRST 0x04 +#define MACON2_MATXRST 0x02 +#define MACON2_TFUNRST 0x01 +/* ENC28J60 MACON3 Register Bit Definitions */ +#define MACON3_PADCFG2 0x80 +#define MACON3_PADCFG1 0x40 +#define MACON3_PADCFG0 0x20 +#define MACON3_TXCRCEN 0x10 +#define MACON3_PHDRLEN 0x08 +#define MACON3_HFRMLEN 0x04 +#define MACON3_FRMLNEN 0x02 +#define MACON3_FULDPX 0x01 +/* ENC28J60 MICMD Register Bit Definitions */ +#define MICMD_MIISCAN 0x02 +#define MICMD_MIIRD 0x01 +/* ENC28J60 MISTAT Register Bit Definitions */ +#define MISTAT_NVALID 0x04 +#define MISTAT_SCAN 0x02 +#define MISTAT_BUSY 0x01 +/* ENC28J60 ERXFCON Register Bit Definitions */ +#define ERXFCON_UCEN 0x80 +#define ERXFCON_ANDOR 0x40 +#define ERXFCON_CRCEN 0x20 +#define ERXFCON_PMEN 0x10 +#define ERXFCON_MPEN 0x08 +#define ERXFCON_HTEN 0x04 +#define ERXFCON_MCEN 0x02 +#define ERXFCON_BCEN 0x01 + +/* ENC28J60 PHY PHCON1 Register Bit Definitions */ +#define PHCON1_PRST 0x8000 +#define PHCON1_PLOOPBK 0x4000 +#define PHCON1_PPWRSV 0x0800 +#define PHCON1_PDPXMD 0x0100 +/* ENC28J60 PHY PHSTAT1 Register Bit Definitions */ +#define PHSTAT1_PFDPX 0x1000 +#define PHSTAT1_PHDPX 0x0800 +#define PHSTAT1_LLSTAT 0x0004 +#define PHSTAT1_JBSTAT 0x0002 +/* ENC28J60 PHY PHSTAT2 Register Bit Definitions */ +#define PHSTAT2_TXSTAT (1 << 13) +#define PHSTAT2_RXSTAT (1 << 12) +#define PHSTAT2_COLSTAT (1 << 11) +#define PHSTAT2_LSTAT (1 << 10) +#define PHSTAT2_DPXSTAT (1 << 9) +#define PHSTAT2_PLRITY (1 << 5) +/* ENC28J60 PHY PHCON2 Register Bit Definitions */ +#define PHCON2_FRCLINK 0x4000 +#define PHCON2_TXDIS 0x2000 +#define PHCON2_JABBER 0x0400 +#define PHCON2_HDLDIS 0x0100 +/* ENC28J60 PHY PHIE Register Bit Definitions */ +#define PHIE_PLNKIE (1 << 4) +#define PHIE_PGEIE (1 << 1) +/* ENC28J60 PHY PHIR Register Bit Definitions */ +#define PHIR_PLNKIF (1 << 4) +#define PHIR_PGEIF (1 << 1) + +/* ENC28J60 Packet Control Byte Bit Definitions */ +#define PKTCTRL_PHUGEEN 0x08 +#define PKTCTRL_PPADEN 0x04 +#define PKTCTRL_PCRCEN 0x02 +#define PKTCTRL_POVERRIDE 0x01 + +/* ENC28J60 Transmit Status Vector */ +#define TSV_TXBYTECNT 0 +#define TSV_TXCOLLISIONCNT 16 +#define TSV_TXCRCERROR 20 +#define TSV_TXLENCHKERROR 21 +#define TSV_TXLENOUTOFRANGE 22 +#define TSV_TXDONE 23 +#define TSV_TXMULTICAST 24 +#define TSV_TXBROADCAST 25 +#define TSV_TXPACKETDEFER 26 +#define TSV_TXEXDEFER 27 +#define TSV_TXEXCOLLISION 28 +#define TSV_TXLATECOLLISION 29 +#define TSV_TXGIANT 30 +#define TSV_TXUNDERRUN 31 +#define TSV_TOTBYTETXONWIRE 32 +#define TSV_TXCONTROLFRAME 48 +#define TSV_TXPAUSEFRAME 49 +#define TSV_BACKPRESSUREAPP 50 +#define TSV_TXVLANTAGFRAME 51 + +#define TSV_SIZE 7 +#define TSV_BYTEOF(x) ((x) / 8) +#define TSV_BITMASK(x) (1 << ((x) % 8)) +#define TSV_GETBIT(x, y) (((x)[TSV_BYTEOF(y)] & TSV_BITMASK(y)) ? 1 : 0) + +/* ENC28J60 Receive Status Vector */ +#define RSV_RXLONGEVDROPEV 16 +#define RSV_CARRIEREV 18 +#define RSV_CRCERROR 20 +#define RSV_LENCHECKERR 21 +#define RSV_LENOUTOFRANGE 22 +#define RSV_RXOK 23 +#define RSV_RXMULTICAST 24 +#define RSV_RXBROADCAST 25 +#define RSV_DRIBBLENIBBLE 26 +#define RSV_RXCONTROLFRAME 27 +#define RSV_RXPAUSEFRAME 28 +#define RSV_RXUNKNOWNOPCODE 29 +#define RSV_RXTYPEVLAN 30 + +#define RSV_SIZE 6 +#define RSV_BITMASK(x) (1 << ((x) - 16)) +#define RSV_GETBIT(x, y) (((x) & RSV_BITMASK(y)) ? 1 : 0) + + +/* SPI operation codes */ +#define ENC28J60_READ_CTRL_REG 0x00 +#define ENC28J60_READ_BUF_MEM 0x3A +#define ENC28J60_WRITE_CTRL_REG 0x40 +#define ENC28J60_WRITE_BUF_MEM 0x7A +#define ENC28J60_BIT_FIELD_SET 0x80 +#define ENC28J60_BIT_FIELD_CLR 0xA0 +#define ENC28J60_SOFT_RESET 0xFF + + +/* buffer boundaries applied to internal 8K ram + * entire available packet buffer space is allocated. + * Give TX buffer space for one full ethernet frame (~1500 bytes) + * receive buffer gets the rest */ +#define TXSTART_INIT 0x1A00 +#define TXEND_INIT 0x1FFF + +/* Put RX buffer at 0 as suggested by the Errata datasheet */ +#define RXSTART_INIT 0x0000 +#define RXEND_INIT 0x19FF + +/* maximum ethernet frame length */ +#define MAX_FRAMELEN 1518 + +/* Preferred half duplex: LEDA: Link status LEDB: Rx/Tx activity */ +#define ENC28J60_LAMPS_MODE 0x3476 + +#endif