| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Mike Sinkovsky | 3182 | 98.48% | 2 | 12.50% |
| Jingoo Han | 16 | 0.50% | 3 | 18.75% |
| Varka Bhadram | 7 | 0.22% | 1 | 6.25% |
| Yongbae Park | 4 | 0.12% | 1 | 6.25% |
| Michael S. Tsirkin | 4 | 0.12% | 1 | 6.25% |
| Wolfram Sang | 4 | 0.12% | 1 | 6.25% |
| Geert Uytterhoeven | 3 | 0.09% | 1 | 6.25% |
| Eric Dumazet | 3 | 0.09% | 1 | 6.25% |
| Florian Westphal | 3 | 0.09% | 1 | 6.25% |
| Thomas Gleixner | 2 | 0.06% | 1 | 6.25% |
| Wei Yongjun | 1 | 0.03% | 1 | 6.25% |
| Joe Perches | 1 | 0.03% | 1 | 6.25% |
| Yue haibing | 1 | 0.03% | 1 | 6.25% |
| Total | 3231 | 16 |
// 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) { 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, 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; memcpy(ndev->dev_addr, sock_addr->sa_data, ETH_ALEN); 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)) { memcpy(ndev->dev_addr, data->mac_addr, ETH_ALEN); } else { eth_hw_addr_random(ndev); } mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); priv->base = devm_ioremap_resource(&pdev->dev, 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(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 int 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); return 0; } #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);
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