+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * 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>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.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/irq.h>
-#include <linux/gpio.h>
-
-#define DRV_NAME "w5300"
-#define DRV_VERSION "2012-04-04"
-
-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 (promiscuous) */
-#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);
- 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);
- w5300_write_direct(priv, W5300_IDM_DR, data);
- 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);
-
- 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]);
-}
-
-static void w5300_hw_reset(struct w5300_priv *priv)
-{
- w5300_write_direct(priv, W5300_MR, MR_RST);
- mdelay(5);
- w5300_write_direct(priv, W5300_MR, priv->indirect ?
- MR_WDF(7) | MR_PB | MR_IND :
- MR_WDF(7) | MR_PB);
- 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);
-}
-
-static void w5300_hw_start(struct w5300_priv *priv)
-{
- w5300_write(priv, W5300_S0_MR, priv->promisc ?
- S0_MR_MACRAW : S0_MR_MACRAW_MF);
- w5300_command(priv, S0_CR_OPEN);
- w5300_write(priv, W5300_S0_IMR, S0_IR_RECV | S0_IR_SENDOK);
- w5300_write(priv, W5300_IMR, IR_S0);
-}
-
-static void w5300_hw_close(struct w5300_priv *priv)
-{
- w5300_write(priv, W5300_IMR, 0);
- w5300_command(priv, S0_CR_CLOSE);
-}
-
-/***********************************************************************
- *
- * Device driver functions / callbacks
- *
- ***********************************************************************/
-
-static void w5300_get_drvinfo(struct net_device *ndev,
- struct ethtool_drvinfo *info)
-{
- strscpy(info->driver, DRV_NAME, sizeof(info->driver));
- strscpy(info->version, DRV_VERSION, sizeof(info->version));
- strscpy(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, unsigned int txqueue)
-{
- struct w5300_priv *priv = netdev_priv(ndev);
-
- netif_stop_queue(ndev);
- w5300_hw_reset(priv);
- w5300_hw_start(priv);
- ndev->stats.tx_errors++;
- netif_trans_update(ndev);
- netif_wake_queue(ndev);
-}
-
-static netdev_tx_t w5300_start_tx(struct sk_buff *skb, struct net_device *ndev)
-{
- struct w5300_priv *priv = netdev_priv(ndev);
-
- netif_stop_queue(ndev);
-
- w5300_write_frame(priv, skb->data, skb->len);
- ndev->stats.tx_packets++;
- ndev->stats.tx_bytes += skb->len;
- dev_kfree_skb(skb);
- netif_dbg(priv, tx_queued, ndev, "tx queued\n");
-
- 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) {
- napi_complete_done(napi, rx_count);
- w5300_write(priv, W5300_IMR, IR_S0);
- }
-
- 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);
-
- if (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)) {
- w5300_write(priv, W5300_IMR, 0);
- __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;
- eth_hw_addr_set(ndev, sock_addr->sa_data);
- 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");
- 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,
-};
-
-static int w5300_hw_probe(struct platform_device *pdev)
-{
- struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev);
- 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)) {
- eth_hw_addr_set(ndev, data->mac_addr);
- } else {
- eth_hw_addr_random(ndev);
- }
-
- priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &mem);
- if (IS_ERR(priv->base))
- return PTR_ERR(priv->base);
-
- mem_size = resource_size(mem);
-
- 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 = request_irq(irq, w5300_interrupt,
- IRQ_TYPE_LEVEL_LOW, name, ndev);
- if (ret < 0)
- return ret;
- priv->irq = irq;
-
- priv->link_gpio = data ? data->link_gpio : -EINVAL;
- 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, 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 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;
-
- ndev->netdev_ops = &w5300_netdev_ops;
- ndev->ethtool_ops = &w5300_ethtool_ops;
- ndev->watchdog_timeo = HZ;
- netif_napi_add_weight(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);
- return err;
-}
-
-static void w5300_remove(struct platform_device *pdev)
-{
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct w5300_priv *priv = netdev_priv(ndev);
-
- w5300_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);
-}
-
-#ifdef CONFIG_PM_SLEEP
-static int w5300_suspend(struct device *dev)
-{
- struct net_device *ndev = dev_get_drvdata(dev);
- 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 device *dev)
-{
- struct net_device *ndev = dev_get_drvdata(dev);
- 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_SLEEP */
-
-static SIMPLE_DEV_PM_OPS(w5300_pm_ops, w5300_suspend, w5300_resume);
-
-static struct platform_driver w5300_driver = {
- .driver = {
- .name = DRV_NAME,
- .pm = &w5300_pm_ops,
- },
- .probe = w5300_probe,
- .remove = w5300_remove,
-};
-
-module_platform_driver(w5300_driver);
projects / thirdparty / linux.git / commitdiff
