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Subject[PATCH v8 2/2] Ethernet driver for the WIZnet W5100 chip
Date
From: Mike Sinkovsky <msink@trikom.ru>

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/wiznet/Kconfig | 12 +
drivers/net/ethernet/wiznet/Makefile | 1 +
drivers/net/ethernet/wiznet/w5100.c | 806 ++++++++++++++++++++++++++++++++++
3 files changed, 819 insertions(+), 0 deletions(-)
create mode 100644 drivers/net/ethernet/wiznet/w5100.c
diff --git a/drivers/net/ethernet/wiznet/Kconfig b/drivers/net/ethernet/wiznet/Kconfig
index 364292b..07b6d3d 100644
--- a/drivers/net/ethernet/wiznet/Kconfig
+++ b/drivers/net/ethernet/wiznet/Kconfig
@@ -17,6 +17,18 @@ config NET_VENDOR_WIZNET

if NET_VENDOR_WIZNET

+config WIZNET_W5100
+ tristate "WIZnet W5100 Ethernet support"
+ ---help---
+ Support for WIZnet W5100 chips.
+
+ W5100 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 w5100.
+
config WIZNET_W5300
tristate "WIZnet W5300 Ethernet support"
---help---
diff --git a/drivers/net/ethernet/wiznet/Makefile b/drivers/net/ethernet/wiznet/Makefile
index 88e0a3e..c614535 100644
--- a/drivers/net/ethernet/wiznet/Makefile
+++ b/drivers/net/ethernet/wiznet/Makefile
@@ -1 +1,2 @@
+obj-$(CONFIG_WIZNET_W5100) += w5100.o
obj-$(CONFIG_WIZNET_W5300) += w5300.o
diff --git a/drivers/net/ethernet/wiznet/w5100.c b/drivers/net/ethernet/wiznet/w5100.c
new file mode 100644
index 0000000..894d4d6
--- /dev/null
+++ b/drivers/net/ethernet/wiznet/w5100.c
@@ -0,0 +1,806 @@
+/*
+ * Ethernet driver for the WIZnet W5100 chip.
+ *
+ * Copyright (C) 2006-2008 WIZnet Co.,Ltd.
+ * Copyright (C) 2012 Mike Sinkovsky <msink@permonline.ru>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/kconfig.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 "w5100"
+#define DRV_VERSION "2012-04-04"
+
+MODULE_DESCRIPTION("WIZnet W5100 Ethernet driver v"DRV_VERSION);
+MODULE_AUTHOR("Mike Sinkovsky <msink@permonline.ru>");
+MODULE_ALIAS("platform:"DRV_NAME);
+MODULE_LICENSE("GPL");
+
+/*
+ * Registers
+ */
+#define W5100_COMMON_REGS 0x0000
+#define W5100_MR 0x0000 /* Mode Register */
+#define MR_RST 0x80 /* S/W reset */
+#define MR_PB 0x10 /* Ping block */
+#define MR_AI 0x02 /* Address Auto-Increment */
+#define MR_IND 0x01 /* Indirect mode */
+#define W5100_SHAR 0x0009 /* Source MAC address */
+#define W5100_IR 0x0015 /* Interrupt Register */
+#define W5100_IMR 0x0016 /* Interrupt Mask Register */
+#define IR_S0 0x01 /* S0 interrupt */
+#define W5100_RTR 0x0017 /* Retry Time-value Register */
+#define RTR_DEFAULT 2000 /* =0x07d0 (2000) */
+#define W5100_RMSR 0x001a /* Receive Memory Size */
+#define W5100_TMSR 0x001b /* Transmit Memory Size */
+#define W5100_COMMON_REGS_LEN 0x0040
+
+#define W5100_S0_REGS 0x0400
+#define W5100_S0_MR 0x0400 /* S0 Mode Register */
+#define S0_MR_MACRAW 0x04 /* MAC RAW mode (promiscous) */
+#define S0_MR_MACRAW_MF 0x44 /* MAC RAW mode (filtered) */
+#define W5100_S0_CR 0x0401 /* S0 Command Register */
+#define S0_CR_OPEN 0x01 /* OPEN command */
+#define S0_CR_CLOSE 0x10 /* CLOSE command */
+#define S0_CR_SEND 0x20 /* SEND command */
+#define S0_CR_RECV 0x40 /* RECV command */
+#define W5100_S0_IR 0x0402 /* S0 Interrupt Register */
+#define S0_IR_SENDOK 0x10 /* complete sending */
+#define S0_IR_RECV 0x04 /* receiving data */
+#define W5100_S0_SR 0x0403 /* S0 Status Register */
+#define S0_SR_MACRAW 0x42 /* mac raw mode */
+#define W5100_S0_TX_FSR 0x0420 /* S0 Transmit free memory size */
+#define W5100_S0_TX_RD 0x0422 /* S0 Transmit memory read pointer */
+#define W5100_S0_TX_WR 0x0424 /* S0 Transmit memory write pointer */
+#define W5100_S0_RX_RSR 0x0426 /* S0 Receive free memory size */
+#define W5100_S0_RX_RD 0x0428 /* S0 Receive memory read pointer */
+#define W5100_S0_REGS_LEN 0x0040
+
+#define W5100_TX_MEM_START 0x4000
+#define W5100_TX_MEM_END 0x5fff
+#define W5100_TX_MEM_MASK 0x1fff
+#define W5100_RX_MEM_START 0x6000
+#define W5100_RX_MEM_END 0x7fff
+#define W5100_RX_MEM_MASK 0x1fff
+
+/*
+ * Device driver private data structure
+ */
+struct w5100_priv {
+ void __iomem *base;
+ spinlock_t reg_lock;
+ bool indirect;
+ u8 (*read)(struct w5100_priv *priv, u16 addr);
+ void (*write)(struct w5100_priv *priv, u16 addr, u8 data);
+ u16 (*read16)(struct w5100_priv *priv, u16 addr);
+ void (*write16)(struct w5100_priv *priv, u16 addr, u16 data);
+ void (*readbuf)(struct w5100_priv *priv, u16 addr, u8 *buf, int len);
+ void (*writebuf)(struct w5100_priv *priv, u16 addr, u8 *buf, int len);
+ 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 W5100 registers
+ * after mapping to Memory-Mapped I/O space.
+ *
+ * 0x8000 bytes are required for memory space.
+ */
+static inline u8 w5100_read_direct(struct w5100_priv *priv, u16 addr)
+{
+ return ioread8(priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
+}
+
+static inline void w5100_write_direct(struct w5100_priv *priv,
+ u16 addr, u8 data)
+{
+ iowrite8(data, priv->base + (addr << CONFIG_WIZNET_BUS_SHIFT));
+}
+
+static u16 w5100_read16_direct(struct w5100_priv *priv, u16 addr)
+{
+ u16 data;
+ data = w5100_read_direct(priv, addr) << 8;
+ data |= w5100_read_direct(priv, addr + 1);
+ return data;
+}
+
+static void w5100_write16_direct(struct w5100_priv *priv, u16 addr, u16 data)
+{
+ w5100_write_direct(priv, addr, data >> 8);
+ w5100_write_direct(priv, addr + 1, data);
+}
+
+static void w5100_readbuf_direct(struct w5100_priv *priv,
+ u16 offset, u8 *buf, int len)
+{
+ u16 addr = W5100_RX_MEM_START + (offset & W5100_RX_MEM_MASK);
+ int i;
+
+ for (i = 0; i < len; i++, addr++) {
+ if (unlikely(addr > W5100_RX_MEM_END))
+ addr = W5100_RX_MEM_START;
+ *buf++ = w5100_read_direct(priv, addr);
+ }
+}
+
+static void w5100_writebuf_direct(struct w5100_priv *priv,
+ u16 offset, u8 *buf, int len)
+{
+ u16 addr = W5100_TX_MEM_START + (offset & W5100_TX_MEM_MASK);
+ int i;
+
+ for (i = 0; i < len; i++, addr++) {
+ if (unlikely(addr > W5100_TX_MEM_END))
+ addr = W5100_TX_MEM_START;
+ w5100_write_direct(priv, addr, *buf++);
+ }
+}
+
+/*
+ * 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 0x04 bytes are required for memory space.
+ */
+#define W5100_IDM_AR 0x01 /* Indirect Mode Address Register */
+#define W5100_IDM_DR 0x03 /* Indirect Mode Data Register */
+
+static u8 w5100_read_indirect(struct w5100_priv *priv, u16 addr)
+{
+ unsigned long flags;
+ u8 data;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ data = w5100_read_direct(priv, W5100_IDM_DR);
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+
+ return data;
+}
+
+static void w5100_write_indirect(struct w5100_priv *priv, u16 addr, u8 data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ w5100_write_direct(priv, W5100_IDM_DR, data);
+ mmiowb();
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+}
+
+static u16 w5100_read16_indirect(struct w5100_priv *priv, u16 addr)
+{
+ unsigned long flags;
+ u16 data;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ data = w5100_read_direct(priv, W5100_IDM_DR) << 8;
+ data |= w5100_read_direct(priv, W5100_IDM_DR);
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+
+ return data;
+}
+
+static void w5100_write16_indirect(struct w5100_priv *priv, u16 addr, u16 data)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ w5100_write_direct(priv, W5100_IDM_DR, data >> 8);
+ w5100_write_direct(priv, W5100_IDM_DR, data);
+ mmiowb();
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+}
+
+static void w5100_readbuf_indirect(struct w5100_priv *priv,
+ u16 offset, u8 *buf, int len)
+{
+ u16 addr = W5100_RX_MEM_START + (offset & W5100_RX_MEM_MASK);
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+
+ for (i = 0; i < len; i++, addr++) {
+ if (unlikely(addr > W5100_RX_MEM_END)) {
+ addr = W5100_RX_MEM_START;
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ }
+ *buf++ = w5100_read_direct(priv, W5100_IDM_DR);
+ }
+ mmiowb();
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+}
+
+static void w5100_writebuf_indirect(struct w5100_priv *priv,
+ u16 offset, u8 *buf, int len)
+{
+ u16 addr = W5100_TX_MEM_START + (offset & W5100_TX_MEM_MASK);
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&priv->reg_lock, flags);
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+
+ for (i = 0; i < len; i++, addr++) {
+ if (unlikely(addr > W5100_TX_MEM_END)) {
+ addr = W5100_TX_MEM_START;
+ w5100_write16_direct(priv, W5100_IDM_AR, addr);
+ mmiowb();
+ }
+ w5100_write_direct(priv, W5100_IDM_DR, *buf++);
+ }
+ mmiowb();
+ spin_unlock_irqrestore(&priv->reg_lock, flags);
+}
+
+#if defined(CONFIG_WIZNET_BUS_DIRECT)
+#define w5100_read w5100_read_direct
+#define w5100_write w5100_write_direct
+#define w5100_read16 w5100_read16_direct
+#define w5100_write16 w5100_write16_direct
+#define w5100_readbuf w5100_readbuf_direct
+#define w5100_writebuf w5100_writebuf_direct
+
+#elif defined(CONFIG_WIZNET_BUS_INDIRECT)
+#define w5100_read w5100_read_indirect
+#define w5100_write w5100_write_indirect
+#define w5100_read16 w5100_read16_indirect
+#define w5100_write16 w5100_write16_indirect
+#define w5100_readbuf w5100_readbuf_indirect
+#define w5100_writebuf w5100_writebuf_indirect
+
+#else /* CONFIG_WIZNET_BUS_ANY */
+#define w5100_read priv->read
+#define w5100_write priv->write
+#define w5100_read16 priv->read16
+#define w5100_write16 priv->write16
+#define w5100_readbuf priv->readbuf
+#define w5100_writebuf priv->writebuf
+#endif
+
+static int w5100_command(struct w5100_priv *priv, u16 cmd)
+{
+ unsigned long timeout = jiffies + msecs_to_jiffies(100);
+
+ w5100_write(priv, W5100_S0_CR, cmd);
+ mmiowb();
+
+ while (w5100_read(priv, W5100_S0_CR) != 0) {
+ if (time_after(jiffies, timeout))
+ return -EIO;
+ cpu_relax();
+ }
+
+ return 0;
+}
+
+static void w5100_write_macaddr(struct w5100_priv *priv)
+{
+ struct net_device *ndev = priv->ndev;
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ w5100_write(priv, W5100_SHAR + i, ndev->dev_addr[i]);
+ mmiowb();
+}
+
+static void w5100_hw_reset(struct w5100_priv *priv)
+{
+ w5100_write_direct(priv, W5100_MR, MR_RST);
+ mmiowb();
+ mdelay(5);
+ w5100_write_direct(priv, W5100_MR, priv->indirect ?
+ MR_PB | MR_AI | MR_IND :
+ MR_PB);
+ mmiowb();
+ w5100_write(priv, W5100_IMR, 0);
+ w5100_write_macaddr(priv);
+
+ /* Configure 16K of internal memory
+ * as 8K RX buffer and 8K TX buffer
+ */
+ w5100_write(priv, W5100_RMSR, 0x03);
+ w5100_write(priv, W5100_TMSR, 0x03);
+ mmiowb();
+}
+
+static void w5100_hw_start(struct w5100_priv *priv)
+{
+ w5100_write(priv, W5100_S0_MR, priv->promisc ?
+ S0_MR_MACRAW : S0_MR_MACRAW_MF);
+ mmiowb();
+ w5100_command(priv, S0_CR_OPEN);
+ w5100_write(priv, W5100_IMR, IR_S0);
+ mmiowb();
+}
+
+static void w5100_hw_close(struct w5100_priv *priv)
+{
+ w5100_write(priv, W5100_IMR, 0);
+ mmiowb();
+ w5100_command(priv, S0_CR_CLOSE);
+}
+
+/***********************************************************************
+ *
+ * Device driver functions / callbacks
+ *
+ ***********************************************************************/
+
+static void w5100_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 w5100_get_link(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ if (gpio_is_valid(priv->link_gpio))
+ return !!gpio_get_value(priv->link_gpio);
+
+ return 1;
+}
+
+static u32 w5100_get_msglevel(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ return priv->msg_enable;
+}
+
+static void w5100_set_msglevel(struct net_device *ndev, u32 value)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ priv->msg_enable = value;
+}
+
+static int w5100_get_regs_len(struct net_device *ndev)
+{
+ return W5100_COMMON_REGS_LEN + W5100_S0_REGS_LEN;
+}
+
+static void w5100_get_regs(struct net_device *ndev,
+ struct ethtool_regs *regs, void *_buf)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+ u8 *buf = _buf;
+ u16 i;
+
+ regs->version = 1;
+ for (i = 0; i < W5100_COMMON_REGS_LEN; i++)
+ *buf++ = w5100_read(priv, W5100_COMMON_REGS + i);
+ for (i = 0; i < W5100_S0_REGS_LEN; i++)
+ *buf++ = w5100_read(priv, W5100_S0_REGS + i);
+}
+
+static void w5100_tx_timeout(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ netif_stop_queue(ndev);
+ w5100_hw_reset(priv);
+ w5100_hw_start(priv);
+ ndev->stats.tx_errors++;
+ ndev->trans_start = jiffies;
+ netif_wake_queue(ndev);
+}
+
+static int w5100_start_tx(struct sk_buff *skb, struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+ u16 offset;
+
+ if (IS_ENABLED(CONFIG_WIZNET_TX_FLOW))
+ netif_stop_queue(ndev);
+
+ offset = w5100_read16(priv, W5100_S0_TX_WR);
+ w5100_writebuf(priv, offset, skb->data, skb->len);
+ w5100_write16(priv, W5100_S0_TX_WR, offset + skb->len);
+ mmiowb();
+ ndev->stats.tx_bytes += skb->len;
+ ndev->stats.tx_packets++;
+ dev_kfree_skb(skb);
+
+ w5100_command(priv, S0_CR_SEND);
+
+ return NETDEV_TX_OK;
+}
+
+static int w5100_napi_poll(struct napi_struct *napi, int budget)
+{
+ struct w5100_priv *priv = container_of(napi, struct w5100_priv, napi);
+ struct net_device *ndev = priv->ndev;
+ struct sk_buff *skb;
+ int rx_count;
+ u16 rx_len;
+ u16 offset;
+ u8 header[2];
+
+ for (rx_count = 0; rx_count < budget; rx_count++) {
+ u16 rx_buf_len = w5100_read16(priv, W5100_S0_RX_RSR);
+ if (rx_buf_len == 0)
+ break;
+
+ offset = w5100_read16(priv, W5100_S0_RX_RD);
+ w5100_readbuf(priv, offset, header, 2);
+ rx_len = get_unaligned_be16(header) - 2;
+
+ skb = netdev_alloc_skb_ip_align(ndev, rx_len);
+ if (unlikely(!skb)) {
+ w5100_write16(priv, W5100_S0_RX_RD,
+ offset + rx_buf_len);
+ w5100_command(priv, S0_CR_RECV);
+ ndev->stats.rx_dropped++;
+ return -ENOMEM;
+ }
+
+ skb_put(skb, rx_len);
+ w5100_readbuf(priv, offset + 2, skb->data, rx_len);
+ w5100_write16(priv, W5100_S0_RX_RD, offset + 2 + rx_len);
+ mmiowb();
+ w5100_command(priv, S0_CR_RECV);
+ 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) {
+ w5100_write(priv, W5100_IMR, IR_S0);
+ mmiowb();
+ napi_complete(napi);
+ }
+
+ return rx_count;
+}
+
+static irqreturn_t w5100_interrupt(int irq, void *ndev_instance)
+{
+ struct net_device *ndev = ndev_instance;
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ int ir = w5100_read(priv, W5100_S0_IR);
+ if (!ir)
+ return IRQ_NONE;
+ w5100_write(priv, W5100_S0_IR, ir);
+ mmiowb();
+
+ if (IS_ENABLED(CONFIG_WIZNET_TX_FLOW) && (ir & S0_IR_SENDOK)) {
+ netif_dbg(priv, tx_done, ndev, "tx done\n");
+ netif_wake_queue(ndev);
+ }
+
+ if (ir & S0_IR_RECV) {
+ if (napi_schedule_prep(&priv->napi)) {
+ w5100_write(priv, W5100_IMR, 0);
+ mmiowb();
+ __napi_schedule(&priv->napi);
+ }
+ }
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t w5100_detect_link(int irq, void *ndev_instance)
+{
+ struct net_device *ndev = ndev_instance;
+ struct w5100_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 w5100_set_rx_mode(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+ bool set_promisc = (ndev->flags & IFF_PROMISC) != 0;
+
+ if (priv->promisc != set_promisc) {
+ priv->promisc = set_promisc;
+ w5100_hw_start(priv);
+ }
+}
+
+static int w5100_set_macaddr(struct net_device *ndev, void *addr)
+{
+ struct w5100_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;
+ w5100_write_macaddr(priv);
+ return 0;
+}
+
+static int w5100_open(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ netif_info(priv, ifup, ndev, "enabling\n");
+ if (!is_valid_ether_addr(ndev->dev_addr))
+ return -EINVAL;
+ w5100_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 w5100_stop(struct net_device *ndev)
+{
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ netif_info(priv, ifdown, ndev, "shutting down\n");
+ w5100_hw_close(priv);
+ netif_carrier_off(ndev);
+ netif_stop_queue(ndev);
+ napi_disable(&priv->napi);
+ return 0;
+}
+
+static const struct ethtool_ops w5100_ethtool_ops = {
+ .get_drvinfo = w5100_get_drvinfo,
+ .get_msglevel = w5100_get_msglevel,
+ .set_msglevel = w5100_set_msglevel,
+ .get_link = w5100_get_link,
+ .get_regs_len = w5100_get_regs_len,
+ .get_regs = w5100_get_regs,
+};
+
+static const struct net_device_ops w5100_netdev_ops = {
+ .ndo_open = w5100_open,
+ .ndo_stop = w5100_stop,
+ .ndo_start_xmit = w5100_start_tx,
+ .ndo_tx_timeout = w5100_tx_timeout,
+ .ndo_set_rx_mode = w5100_set_rx_mode,
+ .ndo_set_mac_address = w5100_set_macaddr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_change_mtu = eth_change_mtu,
+};
+
+static int __devinit w5100_hw_probe(struct platform_device *pdev)
+{
+ struct wiznet_platform_data *data = pdev->dev.platform_data;
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct w5100_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 < W5100_BUS_DIRECT_SIZE;
+ if (priv->indirect) {
+ priv->read = w5100_read_indirect;
+ priv->write = w5100_write_indirect;
+ priv->read16 = w5100_read16_indirect;
+ priv->write16 = w5100_write16_indirect;
+ priv->readbuf = w5100_readbuf_indirect;
+ priv->writebuf = w5100_writebuf_indirect;
+ } else {
+ priv->read = w5100_read_direct;
+ priv->write = w5100_write_direct;
+ priv->read16 = w5100_read16_direct;
+ priv->write16 = w5100_write16_direct;
+ priv->readbuf = w5100_readbuf_direct;
+ priv->writebuf = w5100_writebuf_direct;
+ }
+
+ w5100_hw_reset(priv);
+ if (w5100_read16(priv, W5100_RTR) != RTR_DEFAULT)
+ return -ENODEV;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+ ret = request_irq(irq, w5100_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 (request_any_context_irq(priv->link_irq, w5100_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 w5100_probe(struct platform_device *pdev)
+{
+ struct w5100_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 = &w5100_netdev_ops;
+ ndev->ethtool_ops = &w5100_ethtool_ops;
+ ndev->watchdog_timeo = HZ;
+ netif_napi_add(ndev, &priv->napi, w5100_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 = w5100_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 w5100_remove(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ w5100_hw_reset(priv);
+ free_irq(priv->irq, ndev);
+ if (gpio_is_valid(priv->link_gpio))
+ free_irq(priv->link_irq, ndev);
+
+ unregister_netdev(ndev);
+ free_netdev(ndev);
+ platform_set_drvdata(pdev, NULL);
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int w5100_suspend(struct platform_device *pdev, pm_message_t mesg)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ if (netif_running(ndev)) {
+ netif_carrier_off(ndev);
+ netif_device_detach(ndev);
+
+ w5100_hw_close(priv);
+ }
+ return 0;
+}
+
+static int w5100_resume(struct platform_device *pdev)
+{
+ struct net_device *ndev = platform_get_drvdata(pdev);
+ struct w5100_priv *priv = netdev_priv(ndev);
+
+ if (netif_running(ndev)) {
+ w5100_hw_reset(priv);
+ w5100_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(w5100_pm_ops, w5100_suspend, w5100_resume);
+
+static struct platform_driver w5100_driver = {
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ .pm = &w5100_pm_ops,
+ },
+ .probe = w5100_probe,
+ .remove = __devexit_p(w5100_remove),
+};
+
+module_platform_driver(w5100_driver);
--
1.6.3.3



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  Last update: 2012-04-04 14:13    [from the cache]
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