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    Subject[PATCH v6 1/2] Ethernet driver for the WIZnet W5300 chip
    Date
    Based on original driver from chip manufacturer, but nearly full rewite.
    Tested and used in production with Blackfin BF531 embedded processor.

    Signed-off-by: Mike Sinkovsky <msink@permonline.ru>
    ---
    drivers/net/ethernet/Kconfig | 1 +
    drivers/net/ethernet/Makefile | 1 +
    drivers/net/ethernet/wiznet/Kconfig | 58 +++
    drivers/net/ethernet/wiznet/Makefile | 1 +
    drivers/net/ethernet/wiznet/w5300.c | 703 ++++++++++++++++++++++++++++++++++
    include/linux/platform_data/wiznet.h | 24 ++
    6 files changed, 788 insertions(+), 0 deletions(-)
    create mode 100644 drivers/net/ethernet/wiznet/Kconfig
    create mode 100644 drivers/net/ethernet/wiznet/Makefile
    create mode 100644 drivers/net/ethernet/wiznet/w5300.c
    create mode 100644 include/linux/platform_data/wiznet.h

    diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
    index c63a64c..a11af5c 100644
    --- a/drivers/net/ethernet/Kconfig
    +++ b/drivers/net/ethernet/Kconfig
    @@ -174,6 +174,7 @@ source "drivers/net/ethernet/tile/Kconfig"
    source "drivers/net/ethernet/toshiba/Kconfig"
    source "drivers/net/ethernet/tundra/Kconfig"
    source "drivers/net/ethernet/via/Kconfig"
    +source "drivers/net/ethernet/wiznet/Kconfig"
    source "drivers/net/ethernet/xilinx/Kconfig"
    source "drivers/net/ethernet/xircom/Kconfig"

    diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
    index 9676a51..878ad32 100644
    --- a/drivers/net/ethernet/Makefile
    +++ b/drivers/net/ethernet/Makefile
    @@ -73,5 +73,6 @@ obj-$(CONFIG_TILE_NET) += tile/
    obj-$(CONFIG_NET_VENDOR_TOSHIBA) += toshiba/
    obj-$(CONFIG_NET_VENDOR_TUNDRA) += tundra/
    obj-$(CONFIG_NET_VENDOR_VIA) += via/
    +obj-$(CONFIG_NET_VENDOR_WIZNET) += wiznet/
    obj-$(CONFIG_NET_VENDOR_XILINX) += xilinx/
    obj-$(CONFIG_NET_VENDOR_XIRCOM) += xircom/
    diff --git a/drivers/net/ethernet/wiznet/Kconfig b/drivers/net/ethernet/wiznet/Kconfig
    new file mode 100644
    index 0000000..d7a7b1f
    --- /dev/null
    +++ b/drivers/net/ethernet/wiznet/Kconfig
    @@ -0,0 +1,58 @@
    +#
    +# WIZnet devices configuration
    +#
    +
    +config NET_VENDOR_WIZNET
    + bool "WIZnet devices"
    + default y
    + ---help---
    + If you have a network (Ethernet) card belonging to this class, say Y
    + and read the Ethernet-HOWTO, available from
    + <http://www.tldp.org/docs.html#howto>.
    +
    + 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 WIZnet devices. If you say Y, you will be asked
    + for your specific card in the following questions.
    +
    +if NET_VENDOR_WIZNET
    +
    +config WIZNET_W5300
    + tristate "WIZnet W5300 Ethernet support"
    + ---help---
    + Support for WIZnet W5300 chips.
    +
    + W5300 is a single chip with integrated 10/100 Ethernet MAC,
    + PHY and hardware TCP/IP stack, but this driver is limited to
    + the MAC and PHY functions only, onchip TCP/IP is unused.
    +
    + To compile this driver as a module, choose M here: the module
    + will be called w5300.
    +
    +choice
    + prompt "WIZnet interface mode"
    + default WIZNET_BUS_ANY
    +
    +config WIZNET_BUS_DIRECT
    + bool "Direct address bus mode"
    + ---help---
    + In direct address mode host system can directly access all registers
    + after mapping to Memory-Mapped I/O space.
    +
    +config WIZNET_BUS_INDIRECT
    + bool "Indirect address bus mode"
    + ---help---
    + In indirect address mode host system indirectly accesses registers
    + using Indirect Mode Address Register and Indirect Mode Data Register,
    + which are directly mapped to Memory-Mapped I/O space.
    +
    +config WIZNET_BUS_ANY
    + bool "Select interface mode in runtime"
    + ---help---
    + If interface mode is unknown in compile time, it can be selected
    + in runtime from board/platform resources configuration.
    +
    + Performance may decrease compared to explicitly selected bus mode.
    +endchoice
    +
    +endif # NET_VENDOR_WIZNET
    diff --git a/drivers/net/ethernet/wiznet/Makefile b/drivers/net/ethernet/wiznet/Makefile
    new file mode 100644
    index 0000000..88e0a3e
    --- /dev/null
    +++ b/drivers/net/ethernet/wiznet/Makefile
    @@ -0,0 +1 @@
    +obj-$(CONFIG_WIZNET_W5300) += w5300.o
    diff --git a/drivers/net/ethernet/wiznet/w5300.c b/drivers/net/ethernet/wiznet/w5300.c
    new file mode 100644
    index 0000000..113ef7c
    --- /dev/null
    +++ b/drivers/net/ethernet/wiznet/w5300.c
    @@ -0,0 +1,703 @@
    +/*
    + * Ethernet driver for the WIZnet W5300 chip.
    + *
    + * Copyright (C) 2008-2009 WIZnet Co.,Ltd.
    + * Copyright (C) 2011 Taehun Kim <kth3321 <at> gmail.com>
    + * Copyright (C) 2012 Mike Sinkovsky <msink@permonline.ru>
    + *
    + * Licensed under the GPL-2 or later.
    + */
    +
    +#include <linux/module.h>
    +#include <linux/kernel.h>
    +#include <linux/netdevice.h>
    +#include <linux/etherdevice.h>
    +#include <linux/platform_device.h>
    +#include <linux/platform_data/wiznet.h>
    +#include <linux/ethtool.h>
    +#include <linux/skbuff.h>
    +#include <linux/types.h>
    +#include <linux/errno.h>
    +#include <linux/delay.h>
    +#include <linux/slab.h>
    +#include <linux/spinlock.h>
    +#include <linux/io.h>
    +#include <linux/ioport.h>
    +#include <linux/interrupt.h>
    +#include <linux/gpio.h>
    +
    +#define DRV_NAME "w5300"
    +#define DRV_VERSION "2012-03-30"
    +
    +MODULE_DESCRIPTION("WIZnet W5300 Ethernet driver v"DRV_VERSION);
    +MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
    +MODULE_ALIAS("platform:"DRV_NAME);
    +MODULE_LICENSE("GPL");
    +
    +/*
    + * Registers
    + */
    +#define W5300_MR 0x0000 /* Mode Register */
    +#define MR_DBW (1 << 15) /* Data bus width */
    +#define MR_MPF (1 << 14) /* Mac layer pause frame */
    +#define MR_WDF(n) (((n)&7)<<11) /* Write data fetch time */
    +#define MR_RDH (1 << 10) /* Read data hold time */
    +#define MR_FS (1 << 8) /* FIFO swap */
    +#define MR_RST (1 << 7) /* S/W reset */
    +#define MR_PB (1 << 4) /* Ping block */
    +#define MR_DBS (1 << 2) /* Data bus swap */
    +#define MR_IND (1 << 0) /* Indirect mode */
    +#define W5300_IR 0x0002 /* Interrupt Register */
    +#define W5300_IMR 0x0004 /* Interrupt Mask Register */
    +#define IR_S0 0x0001 /* S0 interrupt */
    +#define W5300_SHARL 0x0008 /* Source MAC address (0123) */
    +#define W5300_SHARH 0x000c /* Source MAC address (45) */
    +#define W5300_TMSRL 0x0020 /* Transmit Memory Size (0123) */
    +#define W5300_TMSRH 0x0024 /* Transmit Memory Size (4567) */
    +#define W5300_RMSRL 0x0028 /* Receive Memory Size (0123) */
    +#define W5300_RMSRH 0x002c /* Receive Memory Size (4567) */
    +#define W5300_MTYPE 0x0030 /* Memory Type */
    +#define W5300_IDR 0x00fe /* Chip ID register */
    +#define IDR_W5300 0x5300 /* =0x5300 for WIZnet W5300 */
    +#define W5300_S0_MR 0x0200 /* S0 Mode Register */
    +#define S0_MR_CLOSED 0x0000 /* Close mode */
    +#define S0_MR_MACRAW 0x0004 /* MAC RAW mode (promiscous) */
    +#define S0_MR_MACRAW_MF 0x0044 /* MAC RAW mode (filtered) */
    +#define W5300_S0_CR 0x0202 /* S0 Command Register */
    +#define S0_CR_OPEN 0x0001 /* OPEN command */
    +#define S0_CR_CLOSE 0x0010 /* CLOSE command */
    +#define S0_CR_SEND 0x0020 /* SEND command */
    +#define S0_CR_RECV 0x0040 /* RECV command */
    +#define W5300_S0_IMR 0x0204 /* S0 Interrupt Mask Register */
    +#define W5300_S0_IR 0x0206 /* S0 Interrupt Register */
    +#define S0_IR_RECV 0x0004 /* Receive interrupt */
    +#define S0_IR_SENDOK 0x0010 /* Send OK interrupt */
    +#define W5300_S0_SSR 0x0208 /* S0 Socket Status Register */
    +#define W5300_S0_TX_WRSR 0x0220 /* S0 TX Write Size Register */
    +#define W5300_S0_TX_FSR 0x0224 /* S0 TX Free Size Register */
    +#define W5300_S0_RX_RSR 0x0228 /* S0 Received data Size */
    +#define W5300_S0_TX_FIFO 0x022e /* S0 Transmit FIFO */
    +#define W5300_S0_RX_FIFO 0x0230 /* S0 Receive FIFO */
    +#define W5300_REGS_LEN 0x0400
    +
    +/*
    + * Device driver private data structure
    + */
    +struct w5300_priv {
    + void __iomem *base;
    + spinlock_t reg_lock;
    + bool indirect;
    + u16 (*read) (struct w5300_priv *priv, u16 addr);
    + void (*write)(struct w5300_priv *priv, u16 addr, u16 data);
    + int irq;
    + int link_irq;
    + int link_gpio;
    +
    + struct napi_struct napi;
    + struct net_device *ndev;
    + bool promisc;
    + u32 msg_enable;
    +};
    +
    +/************************************************************************
    + *
    + * Lowlevel I/O functions
    + *
    + ***********************************************************************/
    +
    +/*
    + * In direct address mode host system can directly access W5300 registers
    + * after mapping to Memory-Mapped I/O space.
    + *
    + * 0x400 bytes are required for memory space.
    + */
    +static inline u16 w5300_read_direct(struct w5300_priv *priv, u16 addr)
    +{
    + return ioread16(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
    +}
    +
    +static inline void w5300_write_direct(struct w5300_priv *priv,
    + u16 addr, u16 data)
    +{
    + iowrite16(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
    +}
    +
    +/*
    + * In indirect address mode host system indirectly accesses registers by
    + * using Indirect Mode Address Register (IDM_AR) and Indirect Mode Data
    + * Register (IDM_DR), which are directly mapped to Memory-Mapped I/O space.
    + * Mode Register (MR) is directly accessible.
    + *
    + * Only 0x06 bytes are required for memory space.
    + */
    +#define W5300_IDM_AR 0x0002 /* Indirect Mode Address */
    +#define W5300_IDM_DR 0x0004 /* Indirect Mode Data */
    +
    +static u16 w5300_read_indirect(struct w5300_priv *priv, u16 addr)
    +{
    + unsigned long flags;
    + u16 data;
    +
    + spin_lock_irqsave(&priv->reg_lock, flags);
    + w5300_write_direct(priv, W5300_IDM_AR, addr);
    + mmiowb();
    + data = w5300_read_direct(priv, W5300_IDM_DR);
    + spin_unlock_irqrestore(&priv->reg_lock, flags);
    +
    + return data;
    +}
    +
    +static void w5300_write_indirect(struct w5300_priv *priv, u16 addr, u16 data)
    +{
    + unsigned long flags;
    +
    + spin_lock_irqsave(&priv->reg_lock, flags);
    + w5300_write_direct(priv, W5300_IDM_AR, addr);
    + mmiowb();
    + w5300_write_direct(priv, W5300_IDM_DR, data);
    + mmiowb();
    + spin_unlock_irqrestore(&priv->reg_lock, flags);
    +}
    +
    +#if defined(CONFIG_WIZNET_BUS_DIRECT)
    +#define w5300_read w5300_read_direct
    +#define w5300_write w5300_write_direct
    +
    +#elif defined(CONFIG_WIZNET_BUS_INDIRECT)
    +#define w5300_read w5300_read_indirect
    +#define w5300_write w5300_write_indirect
    +
    +#else /* CONFIG_WIZNET_BUS_ANY */
    +#define w5300_read priv->read
    +#define w5300_write priv->write
    +#endif
    +
    +static u32 w5300_read32(struct w5300_priv *priv, u16 addr)
    +{
    + u32 data;
    + data = w5300_read(priv, addr) << 16;
    + data |= w5300_read(priv, addr + 2);
    + return data;
    +}
    +
    +static void w5300_write32(struct w5300_priv *priv, u16 addr, u32 data)
    +{
    + w5300_write(priv, addr, data >> 16);
    + w5300_write(priv, addr + 2, data);
    +}
    +
    +static int w5300_command(struct w5300_priv *priv, u16 cmd)
    +{
    + unsigned long timeout = jiffies + msecs_to_jiffies(100);
    +
    + w5300_write(priv, W5300_S0_CR, cmd);
    + mmiowb();
    +
    + while (w5300_read(priv, W5300_S0_CR) != 0) {
    + if (time_after(jiffies, timeout))
    + return -EIO;
    + cpu_relax();
    + }
    +
    + return 0;
    +}
    +
    +static void w5300_read_frame(struct w5300_priv *priv, u8 *buf, int len)
    +{
    + u16 fifo;
    + int i;
    +
    + for (i = 0; i < len; i += 2) {
    + fifo = w5300_read(priv, W5300_S0_RX_FIFO);
    + *buf++ = fifo >> 8;
    + *buf++ = fifo;
    + }
    + fifo = w5300_read(priv, W5300_S0_RX_FIFO);
    + fifo = w5300_read(priv, W5300_S0_RX_FIFO);
    +}
    +
    +static void w5300_write_frame(struct w5300_priv *priv, u8 *buf, int len)
    +{
    + u16 fifo;
    + int i;
    +
    + for (i = 0; i < len; i += 2) {
    + fifo = *buf++ << 8;
    + fifo |= *buf++;
    + w5300_write(priv, W5300_S0_TX_FIFO, fifo);
    + }
    + w5300_write32(priv, W5300_S0_TX_WRSR, len);
    +}
    +
    +static void w5300_write_macaddr(struct w5300_priv *priv)
    +{
    + struct net_device *ndev = priv->ndev;
    + w5300_write32(priv, W5300_SHARL,
    + ndev->dev_addr[0] << 24 |
    + ndev->dev_addr[1] << 16 |
    + ndev->dev_addr[2] << 8 |
    + ndev->dev_addr[3]);
    + w5300_write(priv, W5300_SHARH,
    + ndev->dev_addr[4] << 8 |
    + ndev->dev_addr[5]);
    + mmiowb();
    +}
    +
    +static void w5300_hw_reset(struct w5300_priv *priv)
    +{
    + w5300_write_direct(priv, W5300_MR, MR_RST);
    + mmiowb();
    + mdelay(5);
    + w5300_write_direct(priv, W5300_MR, priv->indirect ?
    + MR_WDF(7) | MR_PB | MR_IND :
    + MR_WDF(7) | MR_PB);
    + mmiowb();
    + w5300_write(priv, W5300_IMR, 0);
    + w5300_write_macaddr(priv);
    +
    + /* Configure 128K of internal memory
    + * as 64K RX fifo and 64K TX fifo
    + */
    + w5300_write32(priv, W5300_RMSRL, 64 << 24);
    + w5300_write32(priv, W5300_RMSRH, 0);
    + w5300_write32(priv, W5300_TMSRL, 64 << 24);
    + w5300_write32(priv, W5300_TMSRH, 0);
    + w5300_write(priv, W5300_MTYPE, 0x00ff);
    + mmiowb();
    +}
    +
    +static void w5300_hw_start(struct w5300_priv *priv)
    +{
    + w5300_write(priv, W5300_S0_MR, priv->promisc ?
    + S0_MR_MACRAW : S0_MR_MACRAW_MF);
    + mmiowb();
    + w5300_command(priv, S0_CR_OPEN);
    + w5300_write(priv, W5300_S0_IMR, S0_IR_RECV);
    + w5300_write(priv, W5300_IMR, IR_S0);
    + mmiowb();
    +}
    +
    +static void w5300_hw_close(struct w5300_priv *priv)
    +{
    + w5300_write(priv, W5300_IMR, 0);
    + mmiowb();
    + w5300_command(priv, S0_CR_CLOSE);
    +}
    +
    +/***********************************************************************
    + *
    + * Device driver functions / callbacks
    + *
    + ***********************************************************************/
    +
    +static void w5300_get_drvinfo(struct net_device *ndev,
    + 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(ndev->dev.parent),
    + sizeof(info->bus_info));
    +}
    +
    +static u32 w5300_get_link(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + if (gpio_is_valid(priv->link_gpio))
    + return !!gpio_get_value(priv->link_gpio);
    +
    + return 1;
    +}
    +
    +static u32 w5300_get_msglevel(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + return priv->msg_enable;
    +}
    +
    +static void w5300_set_msglevel(struct net_device *ndev, u32 value)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + priv->msg_enable = value;
    +}
    +
    +static int w5300_get_regs_len(struct net_device *ndev)
    +{
    + return W5300_REGS_LEN;
    +}
    +
    +static void w5300_get_regs(struct net_device *ndev,
    + struct ethtool_regs *regs, void *_buf)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    + u8 *buf = _buf;
    + u16 addr;
    + u16 data;
    +
    + regs->version = 1;
    + for (addr = 0; addr < W5300_REGS_LEN; addr += 2) {
    + switch (addr & 0x23f) {
    + case W5300_S0_TX_FIFO: /* cannot read TX_FIFO */
    + case W5300_S0_RX_FIFO: /* cannot read RX_FIFO */
    + data = 0xffff;
    + break;
    + default:
    + data = w5300_read(priv, addr);
    + break;
    + }
    + *buf++ = data >> 8;
    + *buf++ = data;
    + }
    +}
    +
    +static void w5300_tx_timeout(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + netif_stop_queue(ndev);
    + w5300_hw_reset(priv);
    + w5300_hw_start(priv);
    + ndev->stats.tx_errors++;
    + ndev->trans_start = jiffies;
    + netif_wake_queue(ndev);
    +}
    +
    +static int w5300_start_tx(struct sk_buff *skb, struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + w5300_write_frame(priv, skb->data, skb->len);
    + mmiowb();
    + ndev->stats.tx_packets++;
    + ndev->stats.tx_bytes += skb->len;
    + dev_kfree_skb(skb);
    +
    + w5300_command(priv, S0_CR_SEND);
    +
    + return NETDEV_TX_OK;
    +}
    +
    +static int w5300_napi_poll(struct napi_struct *napi, int budget)
    +{
    + struct w5300_priv *priv = container_of(napi, struct w5300_priv, napi);
    + struct net_device *ndev = priv->ndev;
    + struct sk_buff *skb;
    + int rx_count;
    + u16 rx_len;
    +
    + for (rx_count = 0; rx_count < budget; rx_count++) {
    + u32 rx_fifo_len = w5300_read32(priv, W5300_S0_RX_RSR);
    + if (rx_fifo_len == 0)
    + break;
    +
    + rx_len = w5300_read(priv, W5300_S0_RX_FIFO);
    +
    + skb = netdev_alloc_skb_ip_align(ndev, roundup(rx_len, 2));
    + if (unlikely(!skb)) {
    + u32 i;
    + for (i = 0; i < rx_fifo_len; i += 2)
    + w5300_read(priv, W5300_S0_RX_FIFO);
    + ndev->stats.rx_dropped++;
    + return -ENOMEM;
    + }
    +
    + skb_put(skb, rx_len);
    + w5300_read_frame(priv, skb->data, rx_len);
    + skb->protocol = eth_type_trans(skb, ndev);
    +
    + netif_receive_skb(skb);
    + ndev->stats.rx_packets++;
    + ndev->stats.rx_bytes += rx_len;
    + }
    +
    + if (rx_count < budget) {
    + w5300_write(priv, W5300_IMR, IR_S0);
    + mmiowb();
    + napi_complete(napi);
    + }
    +
    + return rx_count;
    +}
    +
    +static irqreturn_t w5300_interrupt(int irq, void *ndev_instance)
    +{
    + struct net_device *ndev = ndev_instance;
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + int ir = w5300_read(priv, W5300_S0_IR);
    + if (!ir)
    + return IRQ_NONE;
    + w5300_write(priv, W5300_S0_IR, ir);
    + mmiowb();
    +
    + if (ir & S0_IR_RECV) {
    + if (napi_schedule_prep(&priv->napi)) {
    + w5300_write(priv, W5300_IMR, 0);
    + mmiowb();
    + __napi_schedule(&priv->napi);
    + }
    + }
    +
    + return IRQ_HANDLED;
    +}
    +
    +static irqreturn_t w5300_detect_link(int irq, void *ndev_instance)
    +{
    + struct net_device *ndev = ndev_instance;
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + if (netif_running(ndev)) {
    + if (gpio_get_value(priv->link_gpio) != 0) {
    + netif_info(priv, link, ndev, "link is up\n");
    + netif_carrier_on(ndev);
    + } else {
    + netif_info(priv, link, ndev, "link is down\n");
    + netif_carrier_off(ndev);
    + }
    + }
    +
    + return IRQ_HANDLED;
    +}
    +
    +static void w5300_set_rx_mode(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    + bool set_promisc = (ndev->flags & IFF_PROMISC) != 0;
    +
    + if (priv->promisc != set_promisc) {
    + priv->promisc = set_promisc;
    + w5300_hw_start(priv);
    + }
    +}
    +
    +static int w5300_set_macaddr(struct net_device *ndev, void *addr)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    + struct sockaddr *sock_addr = addr;
    +
    + if (!is_valid_ether_addr(sock_addr->sa_data))
    + return -EADDRNOTAVAIL;
    + memcpy(ndev->dev_addr, sock_addr->sa_data, ETH_ALEN);
    + ndev->addr_assign_type &= ~NET_ADDR_RANDOM;
    + w5300_write_macaddr(priv);
    + return 0;
    +}
    +
    +static int w5300_open(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + netif_info(priv, ifup, ndev, "enabling\n");
    + if (!is_valid_ether_addr(ndev->dev_addr))
    + return -EINVAL;
    + w5300_hw_start(priv);
    + napi_enable(&priv->napi);
    + netif_start_queue(ndev);
    + if (!gpio_is_valid(priv->link_gpio) ||
    + gpio_get_value(priv->link_gpio) != 0)
    + netif_carrier_on(ndev);
    + return 0;
    +}
    +
    +static int w5300_stop(struct net_device *ndev)
    +{
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + netif_info(priv, ifdown, ndev, "shutting down\n");
    + w5300_hw_close(priv);
    + netif_carrier_off(ndev);
    + netif_stop_queue(ndev);
    + napi_disable(&priv->napi);
    + return 0;
    +}
    +
    +static const struct ethtool_ops w5300_ethtool_ops = {
    + .get_drvinfo = w5300_get_drvinfo,
    + .get_msglevel = w5300_get_msglevel,
    + .set_msglevel = w5300_set_msglevel,
    + .get_link = w5300_get_link,
    + .get_regs_len = w5300_get_regs_len,
    + .get_regs = w5300_get_regs,
    +};
    +
    +static const struct net_device_ops w5300_netdev_ops = {
    + .ndo_open = w5300_open,
    + .ndo_stop = w5300_stop,
    + .ndo_start_xmit = w5300_start_tx,
    + .ndo_tx_timeout = w5300_tx_timeout,
    + .ndo_set_rx_mode = w5300_set_rx_mode,
    + .ndo_set_mac_address = w5300_set_macaddr,
    + .ndo_validate_addr = eth_validate_addr,
    + .ndo_change_mtu = eth_change_mtu,
    +};
    +
    +static int __devinit w5300_hw_probe(struct platform_device *pdev)
    +{
    + struct wiznet_platform_data *data = pdev->dev.platform_data;
    + struct net_device *ndev = platform_get_drvdata(pdev);
    + struct w5300_priv *priv = netdev_priv(ndev);
    + const char *name = netdev_name(ndev);
    + struct resource *mem;
    + int mem_size;
    + int irq;
    + int ret;
    +
    + if (data && is_valid_ether_addr(data->mac_addr)) {
    + memcpy(ndev->dev_addr, data->mac_addr, ETH_ALEN);
    + } else {
    + random_ether_addr(ndev->dev_addr);
    + ndev->addr_assign_type |= NET_ADDR_RANDOM;
    + }
    +
    + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
    + if (!mem)
    + return -ENXIO;
    + mem_size = resource_size(mem);
    + if (!devm_request_mem_region(&pdev->dev, mem->start, mem_size, name))
    + return -EBUSY;
    + priv->base = devm_ioremap(&pdev->dev, mem->start, mem_size);
    + if (!priv->base)
    + return -EBUSY;
    +
    + spin_lock_init(&priv->reg_lock);
    + priv->indirect = mem_size < W5300_BUS_DIRECT_SIZE;
    + if (priv->indirect) {
    + priv->read = w5300_read_indirect;
    + priv->write = w5300_write_indirect;
    + } else {
    + priv->read = w5300_read_direct;
    + priv->write = w5300_write_direct;
    + }
    +
    + w5300_hw_reset(priv);
    + if (w5300_read(priv, W5300_IDR) != IDR_W5300)
    + return -ENODEV;
    +
    + irq = platform_get_irq(pdev, 0);
    + if (irq < 0)
    + return irq;
    + ret = devm_request_irq(&pdev->dev, irq, w5300_interrupt,
    + IRQ_TYPE_LEVEL_LOW, name, ndev);
    + if (ret < 0)
    + return ret;
    + priv->irq = irq;
    +
    + priv->link_gpio = data->link_gpio;
    + if (gpio_is_valid(priv->link_gpio)) {
    + char *link_name = devm_kzalloc(&pdev->dev, 16, GFP_KERNEL);
    + if (!link_name)
    + return -ENOMEM;
    + snprintf(link_name, 16, "%s-link", name);
    + priv->link_irq = gpio_to_irq(priv->link_gpio);
    + if (devm_request_threaded_irq(&pdev->dev,
    + priv->link_irq, NULL, w5300_detect_link,
    + IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
    + link_name, priv->ndev) < 0)
    + priv->link_gpio = -EINVAL;
    + }
    +
    + netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, irq);
    + return 0;
    +}
    +
    +static int __devinit w5300_probe(struct platform_device *pdev)
    +{
    + struct w5300_priv *priv;
    + struct net_device *ndev;
    + int err;
    +
    + ndev = alloc_etherdev(sizeof(*priv));
    + if (!ndev)
    + return -ENOMEM;
    + SET_NETDEV_DEV(ndev, &pdev->dev);
    + platform_set_drvdata(pdev, ndev);
    + priv = netdev_priv(ndev);
    + priv->ndev = ndev;
    +
    + ether_setup(ndev);
    + ndev->netdev_ops = &w5300_netdev_ops;
    + ndev->ethtool_ops = &w5300_ethtool_ops;
    + ndev->watchdog_timeo = HZ;
    + netif_napi_add(ndev, &priv->napi, w5300_napi_poll, 16);
    +
    + /* This chip doesn't support VLAN packets with normal MTU,
    + * so disable VLAN for this device.
    + */
    + ndev->features |= NETIF_F_VLAN_CHALLENGED;
    +
    + err = register_netdev(ndev);
    + if (err < 0)
    + goto err_register;
    +
    + err = w5300_hw_probe(pdev);
    + if (err < 0)
    + goto err_hw_probe;
    +
    + return 0;
    +
    +err_hw_probe:
    + unregister_netdev(ndev);
    +err_register:
    + free_netdev(ndev);
    + platform_set_drvdata(pdev, NULL);
    + return err;
    +}
    +
    +static int __devexit w5300_remove(struct platform_device *pdev)
    +{
    + struct net_device *ndev = platform_get_drvdata(pdev);
    +
    + unregister_netdev(ndev);
    + free_netdev(ndev);
    + platform_set_drvdata(pdev, NULL);
    + return 0;
    +}
    +
    +#ifdef CONFIG_PM
    +static int w5300_suspend(struct platform_device *pdev, pm_message_t mesg)
    +{
    + struct net_device *ndev = platform_get_drvdata(pdev);
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + if (netif_running(ndev)) {
    + netif_carrier_off(ndev);
    + netif_device_detach(ndev);
    +
    + w5300_hw_close(priv);
    + }
    + return 0;
    +}
    +
    +static int w5300_resume(struct platform_device *pdev)
    +{
    + struct net_device *ndev = platform_get_drvdata(pdev);
    + struct w5300_priv *priv = netdev_priv(ndev);
    +
    + if (!netif_running(ndev)) {
    + w5300_hw_reset(priv);
    + w5300_hw_start(priv);
    +
    + netif_device_attach(ndev);
    + if (!gpio_is_valid(priv->link_gpio) ||
    + gpio_get_value(priv->link_gpio) != 0)
    + netif_carrier_on(ndev);
    + }
    + return 0;
    +}
    +#endif /* CONFIG_PM */
    +
    +static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
    +
    +static struct platform_driver w5300_driver = {
    + .driver = {
    + .name = DRV_NAME,
    + .owner = THIS_MODULE,
    + .pm = &w5300_pm_ops,
    + },
    + .probe = w5300_probe,
    + .remove = __devexit_p(w5300_remove),
    +};
    +
    +module_platform_driver(w5300_driver);
    diff --git a/include/linux/platform_data/wiznet.h b/include/linux/platform_data/wiznet.h
    new file mode 100644
    index 0000000..b5d8c19
    --- /dev/null
    +++ b/include/linux/platform_data/wiznet.h
    @@ -0,0 +1,24 @@
    +/*
    + * Ethernet driver for the WIZnet W5x00 chip.
    + *
    + * Licensed under the GPL-2 or later.
    + */
    +
    +#ifndef PLATFORM_DATA_WIZNET_H
    +#define PLATFORM_DATA_WIZNET_H
    +
    +#include <linux/if_ether.h>
    +
    +struct wiznet_platform_data {
    + int link_gpio;
    + u8 mac_addr[ETH_ALEN];
    +};
    +
    +#ifndef CONFIG_WIZNET_BUS_SHIFT
    +#define CONFIG_WIZNET_BUS_SHIFT 0
    +#endif
    +
    +#define W5100_BUS_DIRECT_SIZE (0x8000 << CONFIG_WIZNET_BUS_SHIFT)
    +#define W5300_BUS_DIRECT_SIZE (0x0400 << CONFIG_WIZNET_BUS_SHIFT)
    +
    +#endif /* PLATFORM_DATA_WIZNET_H */
    --
    1.6.3.3



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