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1067 lines
25 KiB
C
1067 lines
25 KiB
C
/*
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* Moschip MCS8140 Ethernet MAC driver
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*
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* Copyright (C) 2003, Moschip Semiconductors
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* Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
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*
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* Licensed under GPLv2
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/delay.h>
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#include <linux/ethtool.h>
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#include <linux/mii.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/of.h>
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#include <linux/irq.h>
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#include <linux/err.h>
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#include <linux/phy.h>
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#include <linux/clk.h>
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#include <linux/dma-mapping.h>
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#include <asm/unaligned.h>
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#include <asm/sizes.h>
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#include <mach/hardware.h>
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/* Hardware registers */
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#define MAC_BASE_ADDR ((priv->mac_base))
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#define CTRL_REG (MAC_BASE_ADDR)
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#define MII_BUSY 0x00000001
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#define MII_WRITE 0x00000002
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#define MAC_ADDR_HIGH_REG (MAC_BASE_ADDR + 0x04)
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#define MAC_ADDR_LOW_REG (MAC_BASE_ADDR + 0x08)
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#define MII_ADDR_REG (MAC_BASE_ADDR + 0x14)
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#define MII_DATA_REG (MAC_BASE_ADDR + 0x18)
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/* Link interrupt registers */
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#define LINK_INT_CSR (MAC_BASE_ADDR + 0xD0)
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#define LINK_INT_POLL_TIME (MAC_BASE_ADDR + 0xD4)
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#define DMA_CHAN_WIDTH 32
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#define DMA_RX_CHAN 0
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#define DMA_TX_CHAN 2
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/* Receive DMA registers */
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#define RX_DMA_BASE ((priv->dma_base) + \
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(DMA_CHAN_WIDTH * DMA_RX_CHAN))
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#define RX_BUFFER_ADDR (RX_DMA_BASE + 0x00)
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#define RX_MAX_BYTES (RX_DMA_BASE + 0x04)
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#define RX_ACT_BYTES (RX_DMA_BASE + 0x08)
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#define RX_START_DMA (RX_DMA_BASE + 0x0C)
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#define RX_DMA_ENH (RX_DMA_BASE + 0x14)
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/* Transmit DMA registers */
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#define TX_DMA_BASE ((priv->dma_base) + \
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(DMA_CHAN_WIDTH * DMA_TX_CHAN))
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#define TX_BUFFER_ADDR (TX_DMA_BASE + 0x00)
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#define TX_PKT_BYTES (TX_DMA_BASE + 0x04)
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#define TX_BYTES_SENT (TX_DMA_BASE + 0x08)
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#define TX_START_DMA (TX_DMA_BASE + 0x0C)
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#define TX_DMA_STATUS (TX_DMA_BASE + 0x10)
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#define TX_DMA_ENH (TX_DMA_BASE + 0x14)
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#define RX_ALLOC_SIZE SZ_2K
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#define MAX_ETH_FRAME_SIZE 1536
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#define RX_SKB_TAILROOM 128
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#define RX_SKB_HEADROOM (RX_ALLOC_SIZE - \
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(MAX_ETH_FRAME_SIZE + RX_SKB_TAILROOM) + 0)
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/* WDT Late COL Lenght COL Type */
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#define ERROR_FILTER_MASK ((1<<14) | (1<<15) | (1<<16) | (1<<17) | (0<<18) | \
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/* MII Dribbling CRC Len/type Control */\
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(1<<19) | (1<<20) | (1<<21) | (0<<24) | (1<<25) | \
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/* Unsup Missed */\
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(1<<26) | (0<<31))
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#define TX_RING_SIZE 30
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#define RX_RING_SIZE 30
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static inline u32 nuport_mac_readl(void __iomem *reg)
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{
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return __raw_readl(reg);
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}
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static inline u8 nuport_mac_readb(void __iomem *reg)
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{
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return __raw_readb(reg);
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}
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static inline void nuport_mac_writel(u32 value, void __iomem *reg)
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{
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__raw_writel(value, reg);
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}
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static inline void nuport_mac_writeb(u8 value, void __iomem *reg)
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{
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__raw_writel(value, reg);
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}
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/* MAC private data */
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struct nuport_mac_priv {
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spinlock_t lock;
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void __iomem *mac_base;
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void __iomem *dma_base;
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int rx_irq;
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int tx_irq;
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int link_irq;
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struct clk *emac_clk;
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struct clk *ephy_clk;
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/* Transmit buffers */
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struct sk_buff *tx_skb[TX_RING_SIZE];
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unsigned int valid_txskb[TX_RING_SIZE];
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unsigned int cur_tx;
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unsigned int dma_tx;
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unsigned int tx_full;
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/* Receive buffers */
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struct sk_buff *rx_skb[RX_RING_SIZE];
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unsigned int irq_rxskb[RX_RING_SIZE];
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int pkt_len[RX_RING_SIZE];
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unsigned int cur_rx;
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unsigned int dma_rx;
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unsigned int rx_full;
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unsigned int first_pkt;
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/* Private data */
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struct napi_struct napi;
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struct net_device *dev;
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struct platform_device *pdev;
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struct mii_bus *mii_bus;
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struct phy_device *phydev;
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int old_link;
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int old_duplex;
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};
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void dcache_invalidate_only(unsigned long start, unsigned long end)
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{
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asm("\n"
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" bic r0, r0, #31\n"
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"1: mcr p15, 0, r0, c7, c6, 1\n"
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" add r0, r0, #32\n"
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" cmp r0, r1\n" " blo 1b\n");
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}
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void dcache_clean_range(unsigned long start, unsigned long end)
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{
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asm("\n"
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" bic r0, r0, #31\n"
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"1: mcr p15, 0, r0, c7, c10, 1 @ clean D entry\n"
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" add r0, r0, #32\n"
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" cmp r0, r1\n"
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" blo 1b\n" \
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" mcr p15, 0, r0, c7, c10, 4 @ drain WB\n");
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}
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static inline int nuport_mac_mii_busy_wait(struct nuport_mac_priv *priv)
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{
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unsigned long curr;
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unsigned long finish = jiffies + 3 * HZ;
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do {
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curr = jiffies;
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if (!(nuport_mac_readl(MII_ADDR_REG) & MII_BUSY))
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return 0;
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cpu_relax();
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} while (!time_after_eq(curr, finish));
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return -EBUSY;
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}
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/* Read from PHY registers */
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static int nuport_mac_mii_read(struct mii_bus *bus,
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int mii_id, int regnum)
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{
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struct net_device *dev = bus->priv;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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int ret;
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u32 val = 0;
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ret = nuport_mac_mii_busy_wait(priv);
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if (ret)
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return ret;
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val |= (mii_id << 11) | (regnum << 6) | MII_BUSY;
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nuport_mac_writel(val, MII_ADDR_REG);
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ret = nuport_mac_mii_busy_wait(priv);
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if (ret)
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return ret;
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return nuport_mac_readl(MII_DATA_REG);
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}
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static int nuport_mac_mii_write(struct mii_bus *bus, int mii_id,
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int regnum, u16 value)
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{
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struct net_device *dev = bus->priv;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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int ret;
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u32 val = 0;
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ret = nuport_mac_mii_busy_wait(priv);
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if (ret)
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return ret;
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val |= (mii_id << 11) | (regnum << 6) | MII_BUSY | MII_WRITE;
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nuport_mac_writel(value, MII_DATA_REG);
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nuport_mac_writel(val, MII_ADDR_REG);
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return nuport_mac_mii_busy_wait(priv);
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}
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static int nuport_mac_mii_reset(struct mii_bus *bus)
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{
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return 0;
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}
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static int nuport_mac_start_tx_dma(struct nuport_mac_priv *priv,
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struct sk_buff *skb)
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{
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dma_addr_t p;
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u32 reg;
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unsigned int timeout = 2048;
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while (timeout--) {
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reg = nuport_mac_readl(TX_START_DMA);
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if (!(reg & 0x01))
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break;
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cpu_relax();
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}
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if (!timeout)
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return -EBUSY;
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p = dma_map_single(&priv->pdev->dev, skb->data,
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skb->len, DMA_TO_DEVICE);
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/* enable enhanced mode */
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nuport_mac_writel(0x03, TX_DMA_ENH);
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nuport_mac_writel(p, TX_BUFFER_ADDR);
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nuport_mac_writel((skb->len) - 1, TX_PKT_BYTES);
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wmb();
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nuport_mac_writel(0x0D, TX_START_DMA);
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return 0;
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}
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static void nuport_mac_reset_tx_dma(struct nuport_mac_priv *priv)
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{
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u32 reg;
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reg = nuport_mac_readl(TX_START_DMA);
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reg |= (1 << 24);
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nuport_mac_writel(reg, TX_START_DMA);
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}
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static void nuport_mac_start_rx_dma(struct nuport_mac_priv *priv,
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struct sk_buff *skb)
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{
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dma_addr_t p;
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p = dma_map_single(&priv->pdev->dev, skb->data,
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RX_ALLOC_SIZE, DMA_FROM_DEVICE);
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nuport_mac_writel(p, RX_BUFFER_ADDR);
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wmb();
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nuport_mac_writel(0x01, RX_START_DMA);
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}
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static void nuport_mac_reset_rx_dma(struct nuport_mac_priv *priv)
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{
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u32 reg;
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reg = nuport_mac_readl(RX_START_DMA);
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reg |= (1 << 1);
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nuport_mac_writel(reg, RX_START_DMA);
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}
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/* I suppose this might do something, but I am not sure actually */
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static void nuport_mac_disable_rx_dma(struct nuport_mac_priv *priv)
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{
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u32 reg;
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reg = nuport_mac_readl(RX_DMA_ENH);
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reg &= ~(1 << 1);
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nuport_mac_writel(reg, RX_DMA_ENH);
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}
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static void nuport_mac_enable_rx_dma(struct nuport_mac_priv *priv)
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{
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u32 reg;
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reg = nuport_mac_readl(RX_DMA_ENH);
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reg |= (1 << 1);
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nuport_mac_writel(reg, RX_DMA_ENH);
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}
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/* Add packets to the transmit queue */
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static int nuport_mac_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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unsigned long flags;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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int ret;
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dcache_clean_range((u32) skb->data, (u32)(skb->data + skb->len));
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spin_lock_irqsave(&priv->lock, flags);
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if (priv->first_pkt) {
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ret = nuport_mac_start_tx_dma(priv, skb);
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if (ret) {
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spin_unlock_irqrestore(&priv->lock, flags);
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netdev_err(dev, "transmit path busy\n");
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return NETDEV_TX_BUSY;
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}
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priv->first_pkt = 0;
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}
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priv->tx_skb[priv->cur_tx] = skb;
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dev->stats.tx_bytes += skb->len;
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dev->stats.tx_packets++;
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priv->valid_txskb[priv->cur_tx] = 1;
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priv->cur_tx++;
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dev->trans_start = jiffies;
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if (priv->cur_tx >= TX_RING_SIZE)
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priv->cur_tx = 0;
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spin_unlock_irqrestore(&priv->lock, flags);
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if (priv->valid_txskb[priv->cur_tx]) {
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priv->tx_full = 1;
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netif_stop_queue(dev);
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}
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return NETDEV_TX_OK;
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}
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static void nuport_mac_adjust_link(struct net_device *dev)
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{
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struct nuport_mac_priv *priv = netdev_priv(dev);
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struct phy_device *phydev = priv->phydev;
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unsigned int status_changed = 0;
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u32 reg;
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BUG_ON(!phydev);
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if (priv->old_link != phydev->link) {
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status_changed = 1;
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priv->old_link = phydev->link;
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}
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if (phydev->link & (priv->old_duplex != phydev->duplex)) {
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reg = nuport_mac_readl(CTRL_REG);
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if (phydev->duplex == DUPLEX_FULL)
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reg |= (1 << 20);
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else
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reg &= ~(1 << 20);
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nuport_mac_writel(reg, CTRL_REG);
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status_changed = 1;
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priv->old_duplex = phydev->duplex;
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}
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if (!status_changed)
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return;
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pr_info("%s: link %s", dev->name, phydev->link ?
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"UP" : "DOWN");
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if (phydev->link) {
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pr_cont(" - %d/%s", phydev->speed,
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phydev->duplex == DUPLEX_FULL ? "full" : "half");
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}
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pr_cont("\n");
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}
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static irqreturn_t nuport_mac_link_interrupt(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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u32 reg;
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u8 phy_addr;
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reg = nuport_mac_readl(LINK_INT_CSR);
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phy_addr = (reg >> 1) & 0x0f;
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if (phy_addr != priv->phydev->addr) {
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netdev_err(dev, "spurious PHY irq (phy: %d)\n", phy_addr);
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return IRQ_NONE;
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}
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priv->phydev->link = (reg & (1 << 16));
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nuport_mac_adjust_link(dev);
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return IRQ_HANDLED;
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}
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static irqreturn_t nuport_mac_tx_interrupt(int irq, void *dev_id)
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{
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struct net_device *dev = (struct net_device *)dev_id;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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struct sk_buff *skb;
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&priv->lock, flags);
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skb = priv->tx_skb[priv->dma_tx];
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priv->tx_skb[priv->dma_tx] = NULL;
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priv->valid_txskb[priv->dma_tx] = 0;
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dev_kfree_skb_irq(skb);
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priv->dma_tx++;
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if (priv->dma_tx >= TX_RING_SIZE)
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priv->dma_tx = 0;
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if (!priv->valid_txskb[priv->dma_tx])
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priv->first_pkt = 1;
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else {
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ret = nuport_mac_start_tx_dma(priv, priv->tx_skb[priv->dma_tx]);
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if (ret)
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netdev_err(dev, "failed to restart TX dma\n");
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}
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if (priv->tx_full) {
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netdev_err(dev, "restarting transmit queue\n");
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netif_wake_queue(dev);
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priv->tx_full = 0;
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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return IRQ_HANDLED;
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}
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static unsigned int nuport_mac_has_work(struct nuport_mac_priv *priv)
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{
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unsigned int i;
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for (i = 0; i < RX_RING_SIZE; i++)
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if (priv->irq_rxskb[i])
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return 1;
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return 0;
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}
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static irqreturn_t nuport_mac_rx_interrupt(int irq, void *dev_id)
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{
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struct net_device *dev = (struct net_device *)dev_id;
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struct nuport_mac_priv *priv = netdev_priv(dev);
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unsigned long flags;
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spin_lock_irqsave(&priv->lock, flags);
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priv->pkt_len[priv->dma_rx] = nuport_mac_readl(RX_ACT_BYTES) - 4;
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priv->irq_rxskb[priv->dma_rx] = 0;
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priv->dma_rx++;
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if (priv->dma_rx >= RX_RING_SIZE)
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priv->dma_rx = 0;
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if (priv->irq_rxskb[priv->dma_rx] == 1)
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nuport_mac_start_rx_dma(priv, priv->rx_skb[priv->dma_rx]);
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if (likely(nuport_mac_has_work(priv))) {
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/* find a way to disable DMA rx irq */
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nuport_mac_disable_rx_dma(priv);
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napi_schedule(&priv->napi);
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}
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spin_unlock_irqrestore(&priv->lock, flags);
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return IRQ_HANDLED;
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}
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|
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/* Process received packets in tasklet */
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static int nuport_mac_rx(struct net_device *dev, int limit)
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{
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struct nuport_mac_priv *priv = netdev_priv(dev);
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struct sk_buff *skb;
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int len, status;
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int count = 0;
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while (count < limit && !priv->irq_rxskb[priv->cur_rx]) {
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skb = priv->rx_skb[priv->cur_rx];
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len = priv->pkt_len[priv->cur_rx];
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dcache_invalidate_only(((u32) skb->data),
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((u32) (skb->data + len + 4)));
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/* Remove 2 bytes added by RX buffer shifting */
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len = len - 2;
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skb->data = skb->data + 2;
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|
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/* Get packet status */
|
|
status = get_unaligned((u32 *) (skb->data + len));
|
|
skb->dev = dev;
|
|
|
|
/* packet filter failed */
|
|
if (!(status & (1 << 30))) {
|
|
dev_kfree_skb_irq(skb);
|
|
goto exit;
|
|
}
|
|
|
|
/* missed frame */
|
|
if (status & (1 << 31)) {
|
|
dev->stats.rx_missed_errors++;
|
|
dev_kfree_skb_irq(skb);
|
|
goto exit;
|
|
}
|
|
|
|
/* Not ethernet type */
|
|
if ((!(status & (1 << 18))) || (status & ERROR_FILTER_MASK))
|
|
dev->stats.rx_errors++;
|
|
|
|
if (len > MAX_ETH_FRAME_SIZE) {
|
|
dev_kfree_skb_irq(skb);
|
|
goto exit;
|
|
} else
|
|
skb_put(skb, len);
|
|
|
|
skb->protocol = eth_type_trans(skb, dev);
|
|
dev->stats.rx_packets++;
|
|
|
|
if (status & (1 << 29))
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
if (status & (1 << 27))
|
|
skb->pkt_type = PACKET_MULTICAST;
|
|
if (status & (1 << 28))
|
|
skb->pkt_type = PACKET_BROADCAST;
|
|
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
/* Pass the received packet to network layer */
|
|
netif_receive_skb(skb);
|
|
|
|
if (status != NET_RX_DROP)
|
|
dev->stats.rx_bytes += len - 4; /* Without CRC */
|
|
else
|
|
dev->stats.rx_dropped++;
|
|
|
|
dev->last_rx = jiffies;
|
|
|
|
exit:
|
|
skb = netdev_alloc_skb(dev, RX_ALLOC_SIZE);
|
|
skb_reserve(skb, RX_SKB_HEADROOM);
|
|
priv->rx_skb[priv->cur_rx] = skb;
|
|
priv->irq_rxskb[priv->cur_rx] = 1;
|
|
priv->cur_rx++;
|
|
|
|
if (priv->cur_rx >= RX_RING_SIZE)
|
|
priv->cur_rx = 0;
|
|
count++;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static int nuport_mac_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct nuport_mac_priv *priv =
|
|
container_of(napi, struct nuport_mac_priv, napi);
|
|
struct net_device *dev = priv->dev;
|
|
int work_done;
|
|
|
|
work_done = nuport_mac_rx(dev, budget);
|
|
|
|
if (work_done < budget) {
|
|
napi_complete(napi);
|
|
nuport_mac_enable_rx_dma(priv);
|
|
}
|
|
|
|
return work_done;
|
|
}
|
|
|
|
static void nuport_mac_init_tx_ring(struct nuport_mac_priv *priv)
|
|
{
|
|
int i;
|
|
|
|
priv->cur_tx = priv->dma_tx = priv->tx_full = 0;
|
|
for (i = 0; i < TX_RING_SIZE; i++) {
|
|
priv->tx_skb[i] = NULL;
|
|
priv->valid_txskb[i] = 0;
|
|
}
|
|
priv->first_pkt = 1;
|
|
}
|
|
|
|
static int nuport_mac_init_rx_ring(struct net_device *dev)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
struct sk_buff *skb;
|
|
int i;
|
|
|
|
priv->cur_rx = priv->dma_rx = priv->rx_full = 0;
|
|
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
skb = netdev_alloc_skb(dev, RX_ALLOC_SIZE);
|
|
if (!skb)
|
|
return -ENOMEM;
|
|
skb_reserve(skb, RX_SKB_HEADROOM);
|
|
priv->rx_skb[i] = skb;
|
|
priv->irq_rxskb[i] = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void nuport_mac_free_rx_ring(struct nuport_mac_priv *priv)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < RX_RING_SIZE; i++) {
|
|
if (!priv->rx_skb[i])
|
|
continue;
|
|
|
|
dev_kfree_skb(priv->rx_skb[i]);
|
|
priv->rx_skb[i] = NULL;
|
|
}
|
|
}
|
|
|
|
static void nuport_mac_read_mac_address(struct net_device *dev)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
int i;
|
|
|
|
for (i = 0; i < 4; i++)
|
|
dev->dev_addr[i] = nuport_mac_readb(MAC_ADDR_LOW_REG + i);
|
|
dev->dev_addr[4] = nuport_mac_readb(MAC_ADDR_HIGH_REG);
|
|
dev->dev_addr[5] = nuport_mac_readb(MAC_ADDR_HIGH_REG + 1);
|
|
|
|
if (!is_valid_ether_addr(dev->dev_addr)) {
|
|
dev_info(&priv->pdev->dev, "using random address\n");
|
|
random_ether_addr(dev->dev_addr);
|
|
}
|
|
}
|
|
|
|
static int nuport_mac_change_mac_address(struct net_device *dev, void *mac_addr)
|
|
{
|
|
struct sockaddr *addr = mac_addr;
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
unsigned long *temp = (unsigned long *)dev->dev_addr;
|
|
u32 high, low;
|
|
|
|
if (netif_running(dev))
|
|
return -EBUSY;
|
|
|
|
memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
|
|
nuport_mac_writel(*temp, MAC_ADDR_LOW_REG);
|
|
temp = (unsigned long *)(dev->dev_addr + 4);
|
|
nuport_mac_writel(*temp, MAC_ADDR_HIGH_REG);
|
|
|
|
low = nuport_mac_readl(MAC_ADDR_LOW_REG);
|
|
high = nuport_mac_readl(MAC_ADDR_HIGH_REG);
|
|
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nuport_mac_open(struct net_device *dev)
|
|
{
|
|
int ret;
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
unsigned long flags;
|
|
u32 reg;
|
|
u8 tmp;
|
|
|
|
/* Enable hardware filters */
|
|
reg = nuport_mac_readl((void __iomem *)_CONFADDR_DBGLED);
|
|
reg |= 0x80;
|
|
nuport_mac_writel(reg, (void __iomem *)_CONFADDR_DBGLED);
|
|
|
|
/* Set LEDs to Link act and RX/TX mode */
|
|
reg = nuport_mac_readl((void __iomem *)(_CONFADDR_SYSDBG + 0x04));
|
|
reg |= 0x01;
|
|
nuport_mac_writel(reg, (void __iomem *)(_CONFADDR_SYSDBG + 0x04));
|
|
|
|
ret = clk_enable(priv->emac_clk);
|
|
if (ret) {
|
|
netdev_err(dev, "failed to enable EMAC clock\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Set MAC into full duplex mode by default */
|
|
nuport_mac_writel(0x1010052C, CTRL_REG);
|
|
|
|
/* set mac address in hardware in case it was not already */
|
|
nuport_mac_change_mac_address(dev, dev->dev_addr);
|
|
|
|
ret = request_irq(priv->link_irq, &nuport_mac_link_interrupt,
|
|
0, dev->name, dev);
|
|
if (ret) {
|
|
netdev_err(dev, "unable to request link interrupt\n");
|
|
goto out_emac_clk;
|
|
}
|
|
|
|
phy_start(priv->phydev);
|
|
|
|
/* Enable link interrupt monitoring */
|
|
spin_lock_irqsave(&priv->lock, flags);
|
|
nuport_mac_writel(0x1041 | (priv->phydev->addr << 1), LINK_INT_CSR);
|
|
nuport_mac_writel(0xFFFFF, LINK_INT_POLL_TIME);
|
|
spin_unlock_irqrestore(&priv->lock, flags);
|
|
|
|
ret = request_irq(priv->tx_irq, &nuport_mac_tx_interrupt,
|
|
0, dev->name, dev);
|
|
if (ret) {
|
|
netdev_err(dev, "unable to request rx interrupt\n");
|
|
goto out_link_irq;
|
|
}
|
|
|
|
napi_enable(&priv->napi);
|
|
|
|
ret = request_irq(priv->rx_irq, &nuport_mac_rx_interrupt,
|
|
0, dev->name, dev);
|
|
if (ret) {
|
|
netdev_err(dev, "unable to request tx interrupt\n");
|
|
goto out_tx_irq;
|
|
}
|
|
|
|
/* Enable buffer shifting in RX */
|
|
tmp = nuport_mac_readb((void __iomem *)(_CONFADDR_SYSDBG + 0x1D));
|
|
tmp |= 0x01;
|
|
nuport_mac_writeb(tmp, (void __iomem *)(_CONFADDR_SYSDBG + 0x1D));
|
|
|
|
netif_start_queue(dev);
|
|
|
|
nuport_mac_init_tx_ring(priv);
|
|
|
|
ret = nuport_mac_init_rx_ring(dev);
|
|
if (ret) {
|
|
netdev_err(dev, "rx ring init failed\n");
|
|
goto out_rx_skb;
|
|
}
|
|
|
|
nuport_mac_reset_tx_dma(priv);
|
|
nuport_mac_reset_rx_dma(priv);
|
|
|
|
/* Start RX DMA */
|
|
nuport_mac_start_rx_dma(priv, priv->rx_skb[0]);
|
|
|
|
return 0;
|
|
|
|
out_rx_skb:
|
|
nuport_mac_free_rx_ring(priv);
|
|
free_irq(priv->rx_irq, dev);
|
|
out_tx_irq:
|
|
free_irq(priv->tx_irq, dev);
|
|
out_link_irq:
|
|
free_irq(priv->link_irq, dev);
|
|
out_emac_clk:
|
|
clk_disable(priv->emac_clk);
|
|
return ret;
|
|
}
|
|
|
|
static int nuport_mac_close(struct net_device *dev)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
|
|
spin_lock_irq(&priv->lock);
|
|
napi_disable(&priv->napi);
|
|
netif_stop_queue(dev);
|
|
|
|
free_irq(priv->link_irq, dev);
|
|
nuport_mac_writel(0x00, LINK_INT_CSR);
|
|
nuport_mac_writel(0x00, LINK_INT_POLL_TIME);
|
|
phy_stop(priv->phydev);
|
|
|
|
free_irq(priv->tx_irq, dev);
|
|
free_irq(priv->rx_irq, dev);
|
|
spin_unlock_irq(&priv->lock);
|
|
|
|
nuport_mac_free_rx_ring(priv);
|
|
|
|
clk_disable(priv->emac_clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int nuport_mac_mii_probe(struct net_device *dev)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
struct phy_device *phydev = NULL;
|
|
int ret;
|
|
|
|
ret = clk_enable(priv->ephy_clk);
|
|
if (ret) {
|
|
netdev_err(dev, "unable to enable ePHY clk\n");
|
|
return ret;
|
|
}
|
|
|
|
phydev = phy_find_first(priv->mii_bus);
|
|
if (!phydev) {
|
|
netdev_err(dev, "no PHYs found\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
phydev = phy_connect(dev, dev_name(&phydev->dev),
|
|
nuport_mac_adjust_link, 0,
|
|
PHY_INTERFACE_MODE_MII);
|
|
if (IS_ERR(phydev)) {
|
|
netdev_err(dev, "could not attach PHY\n");
|
|
ret = PTR_ERR(phydev);
|
|
goto out;
|
|
}
|
|
|
|
phydev->supported &= PHY_BASIC_FEATURES;
|
|
phydev->advertising = phydev->supported;
|
|
priv->phydev = phydev;
|
|
priv->old_link = 0;
|
|
priv->old_duplex = -1;
|
|
|
|
dev_info(&priv->pdev->dev, "attached PHY driver [%s] "
|
|
"(mii_bus:phy_addr=%d)\n",
|
|
phydev->drv->name, phydev->addr);
|
|
|
|
return 0;
|
|
|
|
out:
|
|
/* disable the Ethernet PHY clock for the moment */
|
|
clk_disable(priv->ephy_clk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void nuport_mac_ethtool_drvinfo(struct net_device *dev,
|
|
struct ethtool_drvinfo *info)
|
|
{
|
|
strncpy(info->driver, "nuport-mac", sizeof(info->driver));
|
|
strncpy(info->version, "0.1", sizeof(info->version));
|
|
strncpy(info->fw_version, "N/A", sizeof(info->fw_version));
|
|
strncpy(info->bus_info, "internal", sizeof(info->bus_info));
|
|
info->n_stats = 0;
|
|
info->testinfo_len = 0;
|
|
info->regdump_len = 0;
|
|
info->eedump_len = 0;
|
|
}
|
|
|
|
static int nuport_mac_ethtool_get_settings(struct net_device *dev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
|
|
if (priv->phydev)
|
|
return phy_ethtool_gset(priv->phydev, cmd);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int nuport_mac_ethtool_set_settings(struct net_device *dev,
|
|
struct ethtool_cmd *cmd)
|
|
{
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
|
|
if (priv->phydev)
|
|
return phy_ethtool_sset(priv->phydev, cmd);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static const struct ethtool_ops nuport_mac_ethtool_ops = {
|
|
.get_drvinfo = nuport_mac_ethtool_drvinfo,
|
|
.get_link = ethtool_op_get_link,
|
|
.get_settings = nuport_mac_ethtool_get_settings,
|
|
.set_settings = nuport_mac_ethtool_set_settings,
|
|
};
|
|
|
|
static const struct net_device_ops nuport_mac_ops = {
|
|
.ndo_open = nuport_mac_open,
|
|
.ndo_stop = nuport_mac_close,
|
|
.ndo_start_xmit = nuport_mac_start_xmit,
|
|
.ndo_change_mtu = eth_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = nuport_mac_change_mac_address,
|
|
};
|
|
|
|
static int __init nuport_mac_probe(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev;
|
|
struct nuport_mac_priv *priv = NULL;
|
|
struct resource *regs, *dma;
|
|
int ret = 0;
|
|
int rx_irq, tx_irq, link_irq;
|
|
int i;
|
|
|
|
dev = alloc_etherdev(sizeof(struct nuport_mac_priv));
|
|
if (!dev) {
|
|
dev_err(&pdev->dev, "no memory for net_device\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
dma = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
|
if (!regs || !dma) {
|
|
dev_err(&pdev->dev, "failed to get regs resources\n");
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
rx_irq = platform_get_irq(pdev, 0);
|
|
tx_irq = platform_get_irq(pdev, 1);
|
|
link_irq = platform_get_irq(pdev, 2);
|
|
if (rx_irq < 0 || tx_irq < 0 || link_irq < 0) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, dev);
|
|
SET_NETDEV_DEV(dev, &pdev->dev);
|
|
priv = netdev_priv(dev);
|
|
priv->pdev = pdev;
|
|
priv->dev = dev;
|
|
spin_lock_init(&priv->lock);
|
|
|
|
priv->mac_base = devm_ioremap(&pdev->dev,
|
|
regs->start, resource_size(regs));
|
|
if (!priv->mac_base) {
|
|
dev_err(&pdev->dev, "failed to remap regs\n");
|
|
ret = -ENOMEM;
|
|
goto out_platform;
|
|
}
|
|
|
|
priv->dma_base = devm_ioremap(&pdev->dev,
|
|
dma->start, resource_size(dma));
|
|
if (!priv->dma_base) {
|
|
dev_err(&pdev->dev, "failed to remap dma-regs\n");
|
|
ret = -ENOMEM;
|
|
goto out_platform;
|
|
}
|
|
|
|
priv->emac_clk = clk_get(&pdev->dev, "emac");
|
|
if (IS_ERR_OR_NULL(priv->emac_clk)) {
|
|
dev_err(&pdev->dev, "failed to get emac clk\n");
|
|
ret = PTR_ERR(priv->emac_clk);
|
|
goto out_platform;
|
|
}
|
|
|
|
priv->ephy_clk = clk_get(&pdev->dev, "ephy");
|
|
if (IS_ERR_OR_NULL(priv->ephy_clk)) {
|
|
dev_err(&pdev->dev, "failed to get ephy clk\n");
|
|
ret = PTR_ERR(priv->ephy_clk);
|
|
goto out_platform;
|
|
}
|
|
|
|
priv->link_irq = link_irq;
|
|
priv->rx_irq = rx_irq;
|
|
priv->tx_irq = tx_irq;
|
|
dev->netdev_ops = &nuport_mac_ops;
|
|
dev->ethtool_ops = &nuport_mac_ethtool_ops;
|
|
dev->watchdog_timeo = HZ;
|
|
dev->flags = IFF_BROADCAST; /* Supports Broadcast */
|
|
|
|
netif_napi_add(dev, &priv->napi, nuport_mac_poll, 64);
|
|
|
|
priv->mii_bus = mdiobus_alloc();
|
|
if (!priv->mii_bus) {
|
|
dev_err(&pdev->dev, "mii bus allocation failed\n");
|
|
goto out;
|
|
}
|
|
|
|
priv->mii_bus->priv = dev;
|
|
priv->mii_bus->read = nuport_mac_mii_read;
|
|
priv->mii_bus->write = nuport_mac_mii_write;
|
|
priv->mii_bus->reset = nuport_mac_mii_reset;
|
|
priv->mii_bus->name = "nuport-mac-mii";
|
|
priv->mii_bus->phy_mask = (1 << 0);
|
|
snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s", pdev->name);
|
|
priv->mii_bus->irq = kzalloc(PHY_MAX_ADDR * sizeof(int), GFP_KERNEL);
|
|
if (!priv->mii_bus->irq) {
|
|
dev_err(&pdev->dev, "failed to allocate mii_bus irqs\n");
|
|
ret = -ENOMEM;
|
|
goto out_mdio;
|
|
}
|
|
|
|
/* We support PHY interrupts routed back to the MAC */
|
|
for (i = 0; i < PHY_MAX_ADDR; i++)
|
|
priv->mii_bus->irq[i] = PHY_IGNORE_INTERRUPT;
|
|
|
|
ret = mdiobus_register(priv->mii_bus);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register mii_bus\n");
|
|
goto out_mdio_irq;
|
|
}
|
|
|
|
ret = nuport_mac_mii_probe(dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to probe MII bus\n");
|
|
goto out_mdio_unregister;
|
|
}
|
|
|
|
ret = register_netdev(dev);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to register net_device\n");
|
|
goto out_mdio_probe;
|
|
}
|
|
|
|
/* read existing mac address */
|
|
nuport_mac_read_mac_address(dev);
|
|
|
|
dev_info(&pdev->dev, "registered (MAC: %pM)\n", dev->dev_addr);
|
|
|
|
return ret;
|
|
|
|
out_mdio_probe:
|
|
phy_disconnect(priv->phydev);
|
|
out_mdio_unregister:
|
|
mdiobus_unregister(priv->mii_bus);
|
|
out_mdio_irq:
|
|
kfree(priv->mii_bus->irq);
|
|
out_mdio:
|
|
mdiobus_free(priv->mii_bus);
|
|
out_platform:
|
|
platform_set_drvdata(pdev, NULL);
|
|
out:
|
|
clk_put(priv->ephy_clk);
|
|
clk_put(priv->emac_clk);
|
|
free_netdev(dev);
|
|
platform_set_drvdata(pdev, NULL);
|
|
return ret;
|
|
}
|
|
|
|
static int nuport_mac_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(pdev);
|
|
struct nuport_mac_priv *priv = netdev_priv(dev);
|
|
|
|
unregister_netdev(dev);
|
|
phy_disconnect(priv->phydev);
|
|
mdiobus_unregister(priv->mii_bus);
|
|
kfree(priv->mii_bus->irq);
|
|
mdiobus_free(priv->mii_bus);
|
|
clk_put(priv->ephy_clk);
|
|
clk_put(priv->emac_clk);
|
|
free_netdev(dev);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct of_device_id nuport_eth_ids[] __initdata = {
|
|
{.compatible = "moschip,nuport-mac",},
|
|
{ /* sentinel */ },
|
|
};
|
|
|
|
static struct platform_driver nuport_eth_driver = {
|
|
.driver = {
|
|
.name = "nuport-mac",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = nuport_eth_ids,
|
|
},
|
|
.probe = nuport_mac_probe,
|
|
.remove = __devexit_p(nuport_mac_remove),
|
|
};
|
|
|
|
module_platform_driver(nuport_eth_driver);
|
|
|
|
MODULE_AUTHOR("Moschip Semiconductors Ltd.");
|
|
MODULE_DESCRIPTION("Moschip MCS8140 Ethernet MAC driver");
|
|
MODULE_LICENSE("GPL");
|