| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Akinobu Mita | 3194 | 54.65% | 7 | 33.33% |
| Mike Sinkovsky | 2606 | 44.59% | 1 | 4.76% |
| Kees Cook | 6 | 0.10% | 1 | 4.76% |
| Jingoo Han | 6 | 0.10% | 2 | 9.52% |
| Bhaktipriya Shridhar | 5 | 0.09% | 1 | 4.76% |
| Yongbae Park | 4 | 0.07% | 1 | 4.76% |
| Petr Štetiar | 4 | 0.07% | 1 | 4.76% |
| Michael S. Tsirkin | 4 | 0.07% | 1 | 4.76% |
| Varka Bhadram | 3 | 0.05% | 1 | 4.76% |
| Geert Uytterhoeven | 3 | 0.05% | 1 | 4.76% |
| Eric Dumazet | 3 | 0.05% | 1 | 4.76% |
| Florian Westphal | 3 | 0.05% | 1 | 4.76% |
| Thomas Gleixner | 2 | 0.03% | 1 | 4.76% |
| Yue haibing | 1 | 0.02% | 1 | 4.76% |
| Total | 5844 | 21 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Ethernet driver for the WIZnet W5100 chip. * * Copyright (C) 2006-2008 WIZnet Co.,Ltd. * 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> #include "w5100.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"); /* * W5100/W5200/W5500 common 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_COMMON_REGS_LEN 0x0040 #define W5100_Sn_MR 0x0000 /* Sn Mode Register */ #define W5100_Sn_CR 0x0001 /* Sn Command Register */ #define W5100_Sn_IR 0x0002 /* Sn Interrupt Register */ #define W5100_Sn_SR 0x0003 /* Sn Status Register */ #define W5100_Sn_TX_FSR 0x0020 /* Sn Transmit free memory size */ #define W5100_Sn_TX_RD 0x0022 /* Sn Transmit memory read pointer */ #define W5100_Sn_TX_WR 0x0024 /* Sn Transmit memory write pointer */ #define W5100_Sn_RX_RSR 0x0026 /* Sn Receive free memory size */ #define W5100_Sn_RX_RD 0x0028 /* Sn Receive memory read pointer */ #define S0_REGS(priv) ((priv)->s0_regs) #define W5100_S0_MR(priv) (S0_REGS(priv) + W5100_Sn_MR) #define S0_MR_MACRAW 0x04 /* MAC RAW mode */ #define S0_MR_MF 0x40 /* MAC Filter for W5100 and W5200 */ #define W5500_S0_MR_MF 0x80 /* MAC Filter for W5500 */ #define W5100_S0_CR(priv) (S0_REGS(priv) + W5100_Sn_CR) #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(priv) (S0_REGS(priv) + W5100_Sn_IR) #define S0_IR_SENDOK 0x10 /* complete sending */ #define S0_IR_RECV 0x04 /* receiving data */ #define W5100_S0_SR(priv) (S0_REGS(priv) + W5100_Sn_SR) #define S0_SR_MACRAW 0x42 /* mac raw mode */ #define W5100_S0_TX_FSR(priv) (S0_REGS(priv) + W5100_Sn_TX_FSR) #define W5100_S0_TX_RD(priv) (S0_REGS(priv) + W5100_Sn_TX_RD) #define W5100_S0_TX_WR(priv) (S0_REGS(priv) + W5100_Sn_TX_WR) #define W5100_S0_RX_RSR(priv) (S0_REGS(priv) + W5100_Sn_RX_RSR) #define W5100_S0_RX_RD(priv) (S0_REGS(priv) + W5100_Sn_RX_RD) #define W5100_S0_REGS_LEN 0x0040 /* * W5100 and W5200 common registers */ #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) */ /* * W5100 specific register and memory */ #define W5100_RMSR 0x001a /* Receive Memory Size */ #define W5100_TMSR 0x001b /* Transmit Memory Size */ #define W5100_S0_REGS 0x0400 #define W5100_TX_MEM_START 0x4000 #define W5100_TX_MEM_SIZE 0x2000 #define W5100_RX_MEM_START 0x6000 #define W5100_RX_MEM_SIZE 0x2000 /* * W5200 specific register and memory */ #define W5200_S0_REGS 0x4000 #define W5200_Sn_RXMEM_SIZE(n) (0x401e + (n) * 0x0100) /* Sn RX Memory Size */ #define W5200_Sn_TXMEM_SIZE(n) (0x401f + (n) * 0x0100) /* Sn TX Memory Size */ #define W5200_TX_MEM_START 0x8000 #define W5200_TX_MEM_SIZE 0x4000 #define W5200_RX_MEM_START 0xc000 #define W5200_RX_MEM_SIZE 0x4000 /* * W5500 specific register and memory * * W5500 register and memory are organized by multiple blocks. Each one is * selected by 16bits offset address and 5bits block select bits. So we * encode it into 32bits address. (lower 16bits is offset address and * upper 16bits is block select bits) */ #define W5500_SIMR 0x0018 /* Socket Interrupt Mask Register */ #define W5500_RTR 0x0019 /* Retry Time-value Register */ #define W5500_S0_REGS 0x10000 #define W5500_Sn_RXMEM_SIZE(n) \ (0x1001e + (n) * 0x40000) /* Sn RX Memory Size */ #define W5500_Sn_TXMEM_SIZE(n) \ (0x1001f + (n) * 0x40000) /* Sn TX Memory Size */ #define W5500_TX_MEM_START 0x20000 #define W5500_TX_MEM_SIZE 0x04000 #define W5500_RX_MEM_START 0x30000 #define W5500_RX_MEM_SIZE 0x04000 /* * Device driver private data structure */ struct w5100_priv { const struct w5100_ops *ops; /* Socket 0 register offset address */ u32 s0_regs; /* Socket 0 TX buffer offset address and size */ u32 s0_tx_buf; u16 s0_tx_buf_size; /* Socket 0 RX buffer offset address and size */ u32 s0_rx_buf; u16 s0_rx_buf_size; int irq; int link_irq; int link_gpio; struct napi_struct napi; struct net_device *ndev; bool promisc; u32 msg_enable; struct workqueue_struct *xfer_wq; struct work_struct rx_work; struct sk_buff *tx_skb; struct work_struct tx_work; struct work_struct setrx_work; struct work_struct restart_work; }; /************************************************************************ * * Lowlevel I/O functions * ***********************************************************************/ struct w5100_mmio_priv { void __iomem *base; /* Serialize access in indirect address mode */ spinlock_t reg_lock; }; static inline struct w5100_mmio_priv *w5100_mmio_priv(struct net_device *dev) { return w5100_ops_priv(dev); } static inline void __iomem *w5100_mmio(struct net_device *ndev) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); return mmio_priv->base; } /* * 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 int w5100_read_direct(struct net_device *ndev, u32 addr) { return ioread8(w5100_mmio(ndev) + (addr << CONFIG_WIZNET_BUS_SHIFT)); } static inline int __w5100_write_direct(struct net_device *ndev, u32 addr, u8 data) { iowrite8(data, w5100_mmio(ndev) + (addr << CONFIG_WIZNET_BUS_SHIFT)); return 0; } static inline int w5100_write_direct(struct net_device *ndev, u32 addr, u8 data) { __w5100_write_direct(ndev, addr, data); return 0; } static int w5100_read16_direct(struct net_device *ndev, u32 addr) { u16 data; data = w5100_read_direct(ndev, addr) << 8; data |= w5100_read_direct(ndev, addr + 1); return data; } static int w5100_write16_direct(struct net_device *ndev, u32 addr, u16 data) { __w5100_write_direct(ndev, addr, data >> 8); __w5100_write_direct(ndev, addr + 1, data); return 0; } static int w5100_readbulk_direct(struct net_device *ndev, u32 addr, u8 *buf, int len) { int i; for (i = 0; i < len; i++, addr++) *buf++ = w5100_read_direct(ndev, addr); return 0; } static int w5100_writebulk_direct(struct net_device *ndev, u32 addr, const u8 *buf, int len) { int i; for (i = 0; i < len; i++, addr++) __w5100_write_direct(ndev, addr, *buf++); return 0; } static int w5100_mmio_init(struct net_device *ndev) { struct platform_device *pdev = to_platform_device(ndev->dev.parent); struct w5100_priv *priv = netdev_priv(ndev); struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); struct resource *mem; spin_lock_init(&mmio_priv->reg_lock); mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); mmio_priv->base = devm_ioremap_resource(&pdev->dev, mem); if (IS_ERR(mmio_priv->base)) return PTR_ERR(mmio_priv->base); netdev_info(ndev, "at 0x%llx irq %d\n", (u64)mem->start, priv->irq); return 0; } static const struct w5100_ops w5100_mmio_direct_ops = { .chip_id = W5100, .read = w5100_read_direct, .write = w5100_write_direct, .read16 = w5100_read16_direct, .write16 = w5100_write16_direct, .readbulk = w5100_readbulk_direct, .writebulk = w5100_writebulk_direct, .init = w5100_mmio_init, }; /* * 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 int w5100_read_indirect(struct net_device *ndev, u32 addr) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; u8 data; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); data = w5100_read_direct(ndev, W5100_IDM_DR); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return data; } static int w5100_write_indirect(struct net_device *ndev, u32 addr, u8 data) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); w5100_write_direct(ndev, W5100_IDM_DR, data); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return 0; } static int w5100_read16_indirect(struct net_device *ndev, u32 addr) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; u16 data; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); data = w5100_read_direct(ndev, W5100_IDM_DR) << 8; data |= w5100_read_direct(ndev, W5100_IDM_DR); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return data; } static int w5100_write16_indirect(struct net_device *ndev, u32 addr, u16 data) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); __w5100_write_direct(ndev, W5100_IDM_DR, data >> 8); w5100_write_direct(ndev, W5100_IDM_DR, data); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return 0; } static int w5100_readbulk_indirect(struct net_device *ndev, u32 addr, u8 *buf, int len) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; int i; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); for (i = 0; i < len; i++) *buf++ = w5100_read_direct(ndev, W5100_IDM_DR); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return 0; } static int w5100_writebulk_indirect(struct net_device *ndev, u32 addr, const u8 *buf, int len) { struct w5100_mmio_priv *mmio_priv = w5100_mmio_priv(ndev); unsigned long flags; int i; spin_lock_irqsave(&mmio_priv->reg_lock, flags); w5100_write16_direct(ndev, W5100_IDM_AR, addr); for (i = 0; i < len; i++) __w5100_write_direct(ndev, W5100_IDM_DR, *buf++); spin_unlock_irqrestore(&mmio_priv->reg_lock, flags); return 0; } static int w5100_reset_indirect(struct net_device *ndev) { w5100_write_direct(ndev, W5100_MR, MR_RST); mdelay(5); w5100_write_direct(ndev, W5100_MR, MR_PB | MR_AI | MR_IND); return 0; } static const struct w5100_ops w5100_mmio_indirect_ops = { .chip_id = W5100, .read = w5100_read_indirect, .write = w5100_write_indirect, .read16 = w5100_read16_indirect, .write16 = w5100_write16_indirect, .readbulk = w5100_readbulk_indirect, .writebulk = w5100_writebulk_indirect, .init = w5100_mmio_init, .reset = w5100_reset_indirect, }; #if defined(CONFIG_WIZNET_BUS_DIRECT) static int w5100_read(struct w5100_priv *priv, u32 addr) { return w5100_read_direct(priv->ndev, addr); } static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) { return w5100_write_direct(priv->ndev, addr, data); } static int w5100_read16(struct w5100_priv *priv, u32 addr) { return w5100_read16_direct(priv->ndev, addr); } static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) { return w5100_write16_direct(priv->ndev, addr, data); } static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) { return w5100_readbulk_direct(priv->ndev, addr, buf, len); } static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, int len) { return w5100_writebulk_direct(priv->ndev, addr, buf, len); } #elif defined(CONFIG_WIZNET_BUS_INDIRECT) static int w5100_read(struct w5100_priv *priv, u32 addr) { return w5100_read_indirect(priv->ndev, addr); } static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) { return w5100_write_indirect(priv->ndev, addr, data); } static int w5100_read16(struct w5100_priv *priv, u32 addr) { return w5100_read16_indirect(priv->ndev, addr); } static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) { return w5100_write16_indirect(priv->ndev, addr, data); } static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) { return w5100_readbulk_indirect(priv->ndev, addr, buf, len); } static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, int len) { return w5100_writebulk_indirect(priv->ndev, addr, buf, len); } #else /* CONFIG_WIZNET_BUS_ANY */ static int w5100_read(struct w5100_priv *priv, u32 addr) { return priv->ops->read(priv->ndev, addr); } static int w5100_write(struct w5100_priv *priv, u32 addr, u8 data) { return priv->ops->write(priv->ndev, addr, data); } static int w5100_read16(struct w5100_priv *priv, u32 addr) { return priv->ops->read16(priv->ndev, addr); } static int w5100_write16(struct w5100_priv *priv, u32 addr, u16 data) { return priv->ops->write16(priv->ndev, addr, data); } static int w5100_readbulk(struct w5100_priv *priv, u32 addr, u8 *buf, int len) { return priv->ops->readbulk(priv->ndev, addr, buf, len); } static int w5100_writebulk(struct w5100_priv *priv, u32 addr, const u8 *buf, int len) { return priv->ops->writebulk(priv->ndev, addr, buf, len); } #endif static int w5100_readbuf(struct w5100_priv *priv, u16 offset, u8 *buf, int len) { u32 addr; int remain = 0; int ret; const u32 mem_start = priv->s0_rx_buf; const u16 mem_size = priv->s0_rx_buf_size; offset %= mem_size; addr = mem_start + offset; if (offset + len > mem_size) { remain = (offset + len) % mem_size; len = mem_size - offset; } ret = w5100_readbulk(priv, addr, buf, len); if (ret || !remain) return ret; return w5100_readbulk(priv, mem_start, buf + len, remain); } static int w5100_writebuf(struct w5100_priv *priv, u16 offset, const u8 *buf, int len) { u32 addr; int ret; int remain = 0; const u32 mem_start = priv->s0_tx_buf; const u16 mem_size = priv->s0_tx_buf_size; offset %= mem_size; addr = mem_start + offset; if (offset + len > mem_size) { remain = (offset + len) % mem_size; len = mem_size - offset; } ret = w5100_writebulk(priv, addr, buf, len); if (ret || !remain) return ret; return w5100_writebulk(priv, mem_start, buf + len, remain); } static int w5100_reset(struct w5100_priv *priv) { if (priv->ops->reset) return priv->ops->reset(priv->ndev); w5100_write(priv, W5100_MR, MR_RST); mdelay(5); w5100_write(priv, W5100_MR, MR_PB); return 0; } static int w5100_command(struct w5100_priv *priv, u16 cmd) { unsigned long timeout; w5100_write(priv, W5100_S0_CR(priv), cmd); timeout = jiffies + msecs_to_jiffies(100); while (w5100_read(priv, W5100_S0_CR(priv)) != 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; w5100_writebulk(priv, W5100_SHAR, ndev->dev_addr, ETH_ALEN); } static void w5100_socket_intr_mask(struct w5100_priv *priv, u8 mask) { u32 imr; if (priv->ops->chip_id == W5500) imr = W5500_SIMR; else imr = W5100_IMR; w5100_write(priv, imr, mask); } static void w5100_enable_intr(struct w5100_priv *priv) { w5100_socket_intr_mask(priv, IR_S0); } static void w5100_disable_intr(struct w5100_priv *priv) { w5100_socket_intr_mask(priv, 0); } static void w5100_memory_configure(struct w5100_priv *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); } static void w5200_memory_configure(struct w5100_priv *priv) { int i; /* Configure internal RX memory as 16K RX buffer and * internal TX memory as 16K TX buffer */ w5100_write(priv, W5200_Sn_RXMEM_SIZE(0), 0x10); w5100_write(priv, W5200_Sn_TXMEM_SIZE(0), 0x10); for (i = 1; i < 8; i++) { w5100_write(priv, W5200_Sn_RXMEM_SIZE(i), 0); w5100_write(priv, W5200_Sn_TXMEM_SIZE(i), 0); } } static void w5500_memory_configure(struct w5100_priv *priv) { int i; /* Configure internal RX memory as 16K RX buffer and * internal TX memory as 16K TX buffer */ w5100_write(priv, W5500_Sn_RXMEM_SIZE(0), 0x10); w5100_write(priv, W5500_Sn_TXMEM_SIZE(0), 0x10); for (i = 1; i < 8; i++) { w5100_write(priv, W5500_Sn_RXMEM_SIZE(i), 0); w5100_write(priv, W5500_Sn_TXMEM_SIZE(i), 0); } } static int w5100_hw_reset(struct w5100_priv *priv) { u32 rtr; w5100_reset(priv); w5100_disable_intr(priv); w5100_write_macaddr(priv); switch (priv->ops->chip_id) { case W5100: w5100_memory_configure(priv); rtr = W5100_RTR; break; case W5200: w5200_memory_configure(priv); rtr = W5100_RTR; break; case W5500: w5500_memory_configure(priv); rtr = W5500_RTR; break; default: return -EINVAL; } if (w5100_read16(priv, rtr) != RTR_DEFAULT) return -ENODEV; return 0; } static void w5100_hw_start(struct w5100_priv *priv) { u8 mode = S0_MR_MACRAW; if (!priv->promisc) { if (priv->ops->chip_id == W5500) mode |= W5500_S0_MR_MF; else mode |= S0_MR_MF; } w5100_write(priv, W5100_S0_MR(priv), mode); w5100_command(priv, S0_CR_OPEN); w5100_enable_intr(priv); } static void w5100_hw_close(struct w5100_priv *priv) { w5100_disable_intr(priv); 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); regs->version = 1; w5100_readbulk(priv, W5100_COMMON_REGS, buf, W5100_COMMON_REGS_LEN); buf += W5100_COMMON_REGS_LEN; w5100_readbulk(priv, S0_REGS(priv), buf, W5100_S0_REGS_LEN); } static void w5100_restart(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++; netif_trans_update(ndev); netif_wake_queue(ndev); } static void w5100_restart_work(struct work_struct *work) { struct w5100_priv *priv = container_of(work, struct w5100_priv, restart_work); w5100_restart(priv->ndev); } static void w5100_tx_timeout(struct net_device *ndev, unsigned int txqueue) { struct w5100_priv *priv = netdev_priv(ndev); if (priv->ops->may_sleep) schedule_work(&priv->restart_work); else w5100_restart(ndev); } static void w5100_tx_skb(struct net_device *ndev, struct sk_buff *skb) { struct w5100_priv *priv = netdev_priv(ndev); u16 offset; offset = w5100_read16(priv, W5100_S0_TX_WR(priv)); w5100_writebuf(priv, offset, skb->data, skb->len); w5100_write16(priv, W5100_S0_TX_WR(priv), offset + skb->len); ndev->stats.tx_bytes += skb->len; ndev->stats.tx_packets++; dev_kfree_skb(skb); w5100_command(priv, S0_CR_SEND); } static void w5100_tx_work(struct work_struct *work) { struct w5100_priv *priv = container_of(work, struct w5100_priv, tx_work); struct sk_buff *skb = priv->tx_skb; priv->tx_skb = NULL; if (WARN_ON(!skb)) return; w5100_tx_skb(priv->ndev, skb); } static netdev_tx_t w5100_start_tx(struct sk_buff *skb, struct net_device *ndev) { struct w5100_priv *priv = netdev_priv(ndev); netif_stop_queue(ndev); if (priv->ops->may_sleep) { WARN_ON(priv->tx_skb); priv->tx_skb = skb; queue_work(priv->xfer_wq, &priv->tx_work); } else { w5100_tx_skb(ndev, skb); } return NETDEV_TX_OK; } static struct sk_buff *w5100_rx_skb(struct net_device *ndev) { struct w5100_priv *priv = netdev_priv(ndev); struct sk_buff *skb; u16 rx_len; u16 offset; u8 header[2]; u16 rx_buf_len = w5100_read16(priv, W5100_S0_RX_RSR(priv)); if (rx_buf_len == 0) return NULL; offset = w5100_read16(priv, W5100_S0_RX_RD(priv)); 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(priv), offset + rx_buf_len); w5100_command(priv, S0_CR_RECV); ndev->stats.rx_dropped++; return NULL; } skb_put(skb, rx_len); w5100_readbuf(priv, offset + 2, skb->data, rx_len); w5100_write16(priv, W5100_S0_RX_RD(priv), offset + 2 + rx_len); w5100_command(priv, S0_CR_RECV); skb->protocol = eth_type_trans(skb, ndev); ndev->stats.rx_packets++; ndev->stats.rx_bytes += rx_len; return skb; } static void w5100_rx_work(struct work_struct *work) { struct w5100_priv *priv = container_of(work, struct w5100_priv, rx_work); struct sk_buff *skb; while ((skb = w5100_rx_skb(priv->ndev))) netif_rx_ni(skb); w5100_enable_intr(priv); } static int w5100_napi_poll(struct napi_struct *napi, int budget) { struct w5100_priv *priv = container_of(napi, struct w5100_priv, napi); int rx_count; for (rx_count = 0; rx_count < budget; rx_count++) { struct sk_buff *skb = w5100_rx_skb(priv->ndev); if (skb) netif_receive_skb(skb); else break; } if (rx_count < budget) { napi_complete_done(napi, rx_count); w5100_enable_intr(priv); } 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(priv)); if (!ir) return IRQ_NONE; w5100_write(priv, W5100_S0_IR(priv), ir); if (ir & S0_IR_SENDOK) { netif_dbg(priv, tx_done, ndev, "tx done\n"); netif_wake_queue(ndev); } if (ir & S0_IR_RECV) { w5100_disable_intr(priv); if (priv->ops->may_sleep) queue_work(priv->xfer_wq, &priv->rx_work); else if (napi_schedule_prep(&priv->napi)) __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_setrx_work(struct work_struct *work) { struct w5100_priv *priv = container_of(work, struct w5100_priv, setrx_work); w5100_hw_start(priv); } 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; if (priv->ops->may_sleep) schedule_work(&priv->setrx_work); else 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); 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"); 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, }; static int w5100_mmio_probe(struct platform_device *pdev) { struct wiznet_platform_data *data = dev_get_platdata(&pdev->dev); const void *mac_addr = NULL; struct resource *mem; const struct w5100_ops *ops; int irq; if (data && is_valid_ether_addr(data->mac_addr)) mac_addr = data->mac_addr; mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (resource_size(mem) < W5100_BUS_DIRECT_SIZE) ops = &w5100_mmio_indirect_ops; else ops = &w5100_mmio_direct_ops; irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; return w5100_probe(&pdev->dev, ops, sizeof(struct w5100_mmio_priv), mac_addr, irq, data ? data->link_gpio : -EINVAL); } static int w5100_mmio_remove(struct platform_device *pdev) { return w5100_remove(&pdev->dev); } void *w5100_ops_priv(const struct net_device *ndev) { return netdev_priv(ndev) + ALIGN(sizeof(struct w5100_priv), NETDEV_ALIGN); } EXPORT_SYMBOL_GPL(w5100_ops_priv); int w5100_probe(struct device *dev, const struct w5100_ops *ops, int sizeof_ops_priv, const void *mac_addr, int irq, int link_gpio) { struct w5100_priv *priv; struct net_device *ndev; int err; size_t alloc_size; alloc_size = sizeof(*priv); if (sizeof_ops_priv) { alloc_size = ALIGN(alloc_size, NETDEV_ALIGN); alloc_size += sizeof_ops_priv; } alloc_size += NETDEV_ALIGN - 1; ndev = alloc_etherdev(alloc_size); if (!ndev) return -ENOMEM; SET_NETDEV_DEV(ndev, dev); dev_set_drvdata(dev, ndev); priv = netdev_priv(ndev); switch (ops->chip_id) { case W5100: priv->s0_regs = W5100_S0_REGS; priv->s0_tx_buf = W5100_TX_MEM_START; priv->s0_tx_buf_size = W5100_TX_MEM_SIZE; priv->s0_rx_buf = W5100_RX_MEM_START; priv->s0_rx_buf_size = W5100_RX_MEM_SIZE; break; case W5200: priv->s0_regs = W5200_S0_REGS; priv->s0_tx_buf = W5200_TX_MEM_START; priv->s0_tx_buf_size = W5200_TX_MEM_SIZE; priv->s0_rx_buf = W5200_RX_MEM_START; priv->s0_rx_buf_size = W5200_RX_MEM_SIZE; break; case W5500: priv->s0_regs = W5500_S0_REGS; priv->s0_tx_buf = W5500_TX_MEM_START; priv->s0_tx_buf_size = W5500_TX_MEM_SIZE; priv->s0_rx_buf = W5500_RX_MEM_START; priv->s0_rx_buf_size = W5500_RX_MEM_SIZE; break; default: err = -EINVAL; goto err_register; } priv->ndev = ndev; priv->ops = ops; priv->irq = irq; priv->link_gpio = link_gpio; ndev->netdev_ops = &w5100_netdev_ops; ndev->ethtool_ops = &w5100_ethtool_ops; 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; priv->xfer_wq = alloc_workqueue("%s", WQ_MEM_RECLAIM, 0, netdev_name(ndev)); if (!priv->xfer_wq) { err = -ENOMEM; goto err_wq; } INIT_WORK(&priv->rx_work, w5100_rx_work); INIT_WORK(&priv->tx_work, w5100_tx_work); INIT_WORK(&priv->setrx_work, w5100_setrx_work); INIT_WORK(&priv->restart_work, w5100_restart_work); if (!IS_ERR_OR_NULL(mac_addr)) memcpy(ndev->dev_addr, mac_addr, ETH_ALEN); else eth_hw_addr_random(ndev); if (priv->ops->init) { err = priv->ops->init(priv->ndev); if (err) goto err_hw; } err = w5100_hw_reset(priv); if (err) goto err_hw; if (ops->may_sleep) { err = request_threaded_irq(priv->irq, NULL, w5100_interrupt, IRQF_TRIGGER_LOW | IRQF_ONESHOT, netdev_name(ndev), ndev); } else { err = request_irq(priv->irq, w5100_interrupt, IRQF_TRIGGER_LOW, netdev_name(ndev), ndev); } if (err) goto err_hw; if (gpio_is_valid(priv->link_gpio)) { char *link_name = devm_kzalloc(dev, 16, GFP_KERNEL); if (!link_name) { err = -ENOMEM; goto err_gpio; } snprintf(link_name, 16, "%s-link", netdev_name(ndev)); 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; } return 0; err_gpio: free_irq(priv->irq, ndev); err_hw: destroy_workqueue(priv->xfer_wq); err_wq: unregister_netdev(ndev); err_register: free_netdev(ndev); return err; } EXPORT_SYMBOL_GPL(w5100_probe); int w5100_remove(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); 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); flush_work(&priv->setrx_work); flush_work(&priv->restart_work); destroy_workqueue(priv->xfer_wq); unregister_netdev(ndev); free_netdev(ndev); return 0; } EXPORT_SYMBOL_GPL(w5100_remove); #ifdef CONFIG_PM_SLEEP static int w5100_suspend(struct device *dev) { struct net_device *ndev = dev_get_drvdata(dev); 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 device *dev) { struct net_device *ndev = dev_get_drvdata(dev); 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_SLEEP */ SIMPLE_DEV_PM_OPS(w5100_pm_ops, w5100_suspend, w5100_resume); EXPORT_SYMBOL_GPL(w5100_pm_ops); static struct platform_driver w5100_mmio_driver = { .driver = { .name = DRV_NAME, .pm = &w5100_pm_ops, }, .probe = w5100_mmio_probe, .remove = w5100_mmio_remove, }; module_platform_driver(w5100_mmio_driver);
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