Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Atmel MACB Ethernet Controller driver |
| 3 | * |
| 4 | * Copyright (C) 2004-2006 Atmel Corporation |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/clk.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/moduleparam.h> |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/types.h> |
| 16 | #include <linux/slab.h> |
| 17 | #include <linux/init.h> |
| 18 | #include <linux/netdevice.h> |
| 19 | #include <linux/etherdevice.h> |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 20 | #include <linux/dma-mapping.h> |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 21 | #include <linux/platform_device.h> |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 22 | #include <linux/phy.h> |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 23 | |
| 24 | #include <asm/arch/board.h> |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 25 | #include <asm/arch/cpu.h> |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 26 | |
| 27 | #include "macb.h" |
| 28 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 29 | #define RX_BUFFER_SIZE 128 |
| 30 | #define RX_RING_SIZE 512 |
| 31 | #define RX_RING_BYTES (sizeof(struct dma_desc) * RX_RING_SIZE) |
| 32 | |
| 33 | /* Make the IP header word-aligned (the ethernet header is 14 bytes) */ |
| 34 | #define RX_OFFSET 2 |
| 35 | |
| 36 | #define TX_RING_SIZE 128 |
| 37 | #define DEF_TX_RING_PENDING (TX_RING_SIZE - 1) |
| 38 | #define TX_RING_BYTES (sizeof(struct dma_desc) * TX_RING_SIZE) |
| 39 | |
| 40 | #define TX_RING_GAP(bp) \ |
| 41 | (TX_RING_SIZE - (bp)->tx_pending) |
| 42 | #define TX_BUFFS_AVAIL(bp) \ |
| 43 | (((bp)->tx_tail <= (bp)->tx_head) ? \ |
| 44 | (bp)->tx_tail + (bp)->tx_pending - (bp)->tx_head : \ |
| 45 | (bp)->tx_tail - (bp)->tx_head - TX_RING_GAP(bp)) |
| 46 | #define NEXT_TX(n) (((n) + 1) & (TX_RING_SIZE - 1)) |
| 47 | |
| 48 | #define NEXT_RX(n) (((n) + 1) & (RX_RING_SIZE - 1)) |
| 49 | |
| 50 | /* minimum number of free TX descriptors before waking up TX process */ |
| 51 | #define MACB_TX_WAKEUP_THRESH (TX_RING_SIZE / 4) |
| 52 | |
| 53 | #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(RXUBR) \ |
| 54 | | MACB_BIT(ISR_ROVR)) |
| 55 | |
| 56 | static void __macb_set_hwaddr(struct macb *bp) |
| 57 | { |
| 58 | u32 bottom; |
| 59 | u16 top; |
| 60 | |
| 61 | bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); |
| 62 | macb_writel(bp, SA1B, bottom); |
| 63 | top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); |
| 64 | macb_writel(bp, SA1T, top); |
| 65 | } |
| 66 | |
| 67 | static void __init macb_get_hwaddr(struct macb *bp) |
| 68 | { |
| 69 | u32 bottom; |
| 70 | u16 top; |
| 71 | u8 addr[6]; |
| 72 | |
| 73 | bottom = macb_readl(bp, SA1B); |
| 74 | top = macb_readl(bp, SA1T); |
| 75 | |
| 76 | addr[0] = bottom & 0xff; |
| 77 | addr[1] = (bottom >> 8) & 0xff; |
| 78 | addr[2] = (bottom >> 16) & 0xff; |
| 79 | addr[3] = (bottom >> 24) & 0xff; |
| 80 | addr[4] = top & 0xff; |
| 81 | addr[5] = (top >> 8) & 0xff; |
| 82 | |
| 83 | if (is_valid_ether_addr(addr)) |
| 84 | memcpy(bp->dev->dev_addr, addr, sizeof(addr)); |
| 85 | } |
| 86 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 87 | static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 88 | { |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 89 | struct macb *bp = bus->priv; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 90 | int value; |
| 91 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 92 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) |
| 93 | | MACB_BF(RW, MACB_MAN_READ) |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 94 | | MACB_BF(PHYA, mii_id) |
| 95 | | MACB_BF(REGA, regnum) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 96 | | MACB_BF(CODE, MACB_MAN_CODE))); |
| 97 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 98 | /* wait for end of transfer */ |
| 99 | while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR))) |
| 100 | cpu_relax(); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 101 | |
| 102 | value = MACB_BFEXT(DATA, macb_readl(bp, MAN)); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 103 | |
| 104 | return value; |
| 105 | } |
| 106 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 107 | static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum, |
| 108 | u16 value) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 109 | { |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 110 | struct macb *bp = bus->priv; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 111 | |
| 112 | macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_SOF) |
| 113 | | MACB_BF(RW, MACB_MAN_WRITE) |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 114 | | MACB_BF(PHYA, mii_id) |
| 115 | | MACB_BF(REGA, regnum) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 116 | | MACB_BF(CODE, MACB_MAN_CODE) |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 117 | | MACB_BF(DATA, value))); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 118 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 119 | /* wait for end of transfer */ |
| 120 | while (!MACB_BFEXT(IDLE, macb_readl(bp, NSR))) |
| 121 | cpu_relax(); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 122 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 123 | return 0; |
| 124 | } |
| 125 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 126 | static int macb_mdio_reset(struct mii_bus *bus) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 127 | { |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 128 | return 0; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 129 | } |
| 130 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 131 | static void macb_handle_link_change(struct net_device *dev) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 132 | { |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 133 | struct macb *bp = netdev_priv(dev); |
| 134 | struct phy_device *phydev = bp->phy_dev; |
| 135 | unsigned long flags; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 136 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 137 | int status_change = 0; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 138 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 139 | spin_lock_irqsave(&bp->lock, flags); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 140 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 141 | if (phydev->link) { |
| 142 | if ((bp->speed != phydev->speed) || |
| 143 | (bp->duplex != phydev->duplex)) { |
| 144 | u32 reg; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 145 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 146 | reg = macb_readl(bp, NCFGR); |
| 147 | reg &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); |
| 148 | |
| 149 | if (phydev->duplex) |
| 150 | reg |= MACB_BIT(FD); |
Atsushi Nemoto | 179956f | 2008-02-21 22:50:54 +0900 | [diff] [blame] | 151 | if (phydev->speed == SPEED_100) |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 152 | reg |= MACB_BIT(SPD); |
| 153 | |
| 154 | macb_writel(bp, NCFGR, reg); |
| 155 | |
| 156 | bp->speed = phydev->speed; |
| 157 | bp->duplex = phydev->duplex; |
| 158 | status_change = 1; |
| 159 | } |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 160 | } |
| 161 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 162 | if (phydev->link != bp->link) { |
| 163 | if (phydev->link) |
| 164 | netif_schedule(dev); |
| 165 | else { |
| 166 | bp->speed = 0; |
| 167 | bp->duplex = -1; |
| 168 | } |
| 169 | bp->link = phydev->link; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 170 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 171 | status_change = 1; |
| 172 | } |
| 173 | |
| 174 | spin_unlock_irqrestore(&bp->lock, flags); |
| 175 | |
| 176 | if (status_change) { |
| 177 | if (phydev->link) |
| 178 | printk(KERN_INFO "%s: link up (%d/%s)\n", |
| 179 | dev->name, phydev->speed, |
| 180 | DUPLEX_FULL == phydev->duplex ? "Full":"Half"); |
| 181 | else |
| 182 | printk(KERN_INFO "%s: link down\n", dev->name); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | /* based on au1000_eth. c*/ |
| 187 | static int macb_mii_probe(struct net_device *dev) |
| 188 | { |
| 189 | struct macb *bp = netdev_priv(dev); |
| 190 | struct phy_device *phydev = NULL; |
| 191 | struct eth_platform_data *pdata; |
| 192 | int phy_addr; |
| 193 | |
| 194 | /* find the first phy */ |
| 195 | for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++) { |
| 196 | if (bp->mii_bus.phy_map[phy_addr]) { |
| 197 | phydev = bp->mii_bus.phy_map[phy_addr]; |
| 198 | break; |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | if (!phydev) { |
| 203 | printk (KERN_ERR "%s: no PHY found\n", dev->name); |
| 204 | return -1; |
| 205 | } |
| 206 | |
| 207 | pdata = bp->pdev->dev.platform_data; |
| 208 | /* TODO : add pin_irq */ |
| 209 | |
| 210 | /* attach the mac to the phy */ |
| 211 | if (pdata && pdata->is_rmii) { |
| 212 | phydev = phy_connect(dev, phydev->dev.bus_id, |
| 213 | &macb_handle_link_change, 0, PHY_INTERFACE_MODE_RMII); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 214 | } else { |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 215 | phydev = phy_connect(dev, phydev->dev.bus_id, |
| 216 | &macb_handle_link_change, 0, PHY_INTERFACE_MODE_MII); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 217 | } |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 218 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 219 | if (IS_ERR(phydev)) { |
| 220 | printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name); |
| 221 | return PTR_ERR(phydev); |
| 222 | } |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 223 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 224 | /* mask with MAC supported features */ |
| 225 | phydev->supported &= PHY_BASIC_FEATURES; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 226 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 227 | phydev->advertising = phydev->supported; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 228 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 229 | bp->link = 0; |
| 230 | bp->speed = 0; |
| 231 | bp->duplex = -1; |
| 232 | bp->phy_dev = phydev; |
| 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
| 237 | static int macb_mii_init(struct macb *bp) |
| 238 | { |
| 239 | struct eth_platform_data *pdata; |
| 240 | int err = -ENXIO, i; |
| 241 | |
| 242 | /* Enable managment port */ |
| 243 | macb_writel(bp, NCR, MACB_BIT(MPE)); |
| 244 | |
Atsushi Nemoto | 72cfe92 | 2008-04-12 00:58:14 +0900 | [diff] [blame] | 245 | bp->mii_bus.name = "MACB_mii_bus"; |
| 246 | bp->mii_bus.read = &macb_mdio_read; |
| 247 | bp->mii_bus.write = &macb_mdio_write; |
| 248 | bp->mii_bus.reset = &macb_mdio_reset; |
Andy Fleming | 9d9326d3 | 2008-04-09 19:38:13 -0500 | [diff] [blame] | 249 | snprintf(bp->mii_bus.id, MII_BUS_ID_SIZE, "%x", bp->pdev->id); |
Atsushi Nemoto | 72cfe92 | 2008-04-12 00:58:14 +0900 | [diff] [blame] | 250 | bp->mii_bus.priv = bp; |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 251 | bp->mii_bus.dev = &bp->dev->dev; |
| 252 | pdata = bp->pdev->dev.platform_data; |
| 253 | |
| 254 | if (pdata) |
| 255 | bp->mii_bus.phy_mask = pdata->phy_mask; |
| 256 | |
| 257 | bp->mii_bus.irq = kmalloc(sizeof(int)*PHY_MAX_ADDR, GFP_KERNEL); |
| 258 | if (!bp->mii_bus.irq) { |
| 259 | err = -ENOMEM; |
| 260 | goto err_out; |
| 261 | } |
| 262 | |
| 263 | for (i = 0; i < PHY_MAX_ADDR; i++) |
| 264 | bp->mii_bus.irq[i] = PHY_POLL; |
| 265 | |
| 266 | platform_set_drvdata(bp->dev, &bp->mii_bus); |
| 267 | |
| 268 | if (mdiobus_register(&bp->mii_bus)) |
| 269 | goto err_out_free_mdio_irq; |
| 270 | |
| 271 | if (macb_mii_probe(bp->dev) != 0) { |
| 272 | goto err_out_unregister_bus; |
| 273 | } |
| 274 | |
| 275 | return 0; |
| 276 | |
| 277 | err_out_unregister_bus: |
| 278 | mdiobus_unregister(&bp->mii_bus); |
| 279 | err_out_free_mdio_irq: |
| 280 | kfree(bp->mii_bus.irq); |
| 281 | err_out: |
| 282 | return err; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | static void macb_update_stats(struct macb *bp) |
| 286 | { |
| 287 | u32 __iomem *reg = bp->regs + MACB_PFR; |
| 288 | u32 *p = &bp->hw_stats.rx_pause_frames; |
| 289 | u32 *end = &bp->hw_stats.tx_pause_frames + 1; |
| 290 | |
| 291 | WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); |
| 292 | |
| 293 | for(; p < end; p++, reg++) |
Haavard Skinnemoen | 0f0d84e | 2006-12-08 14:38:30 +0100 | [diff] [blame] | 294 | *p += __raw_readl(reg); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 295 | } |
| 296 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 297 | static void macb_tx(struct macb *bp) |
| 298 | { |
| 299 | unsigned int tail; |
| 300 | unsigned int head; |
| 301 | u32 status; |
| 302 | |
| 303 | status = macb_readl(bp, TSR); |
| 304 | macb_writel(bp, TSR, status); |
| 305 | |
| 306 | dev_dbg(&bp->pdev->dev, "macb_tx status = %02lx\n", |
| 307 | (unsigned long)status); |
| 308 | |
| 309 | if (status & MACB_BIT(UND)) { |
Gregory CLEMENT | bdcba151 | 2007-12-19 18:23:44 +0100 | [diff] [blame] | 310 | int i; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 311 | printk(KERN_ERR "%s: TX underrun, resetting buffers\n", |
Gregory CLEMENT | bdcba151 | 2007-12-19 18:23:44 +0100 | [diff] [blame] | 312 | bp->dev->name); |
| 313 | |
| 314 | head = bp->tx_head; |
| 315 | |
| 316 | /*Mark all the buffer as used to avoid sending a lost buffer*/ |
| 317 | for (i = 0; i < TX_RING_SIZE; i++) |
| 318 | bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); |
| 319 | |
| 320 | /* free transmit buffer in upper layer*/ |
| 321 | for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { |
| 322 | struct ring_info *rp = &bp->tx_skb[tail]; |
| 323 | struct sk_buff *skb = rp->skb; |
| 324 | |
| 325 | BUG_ON(skb == NULL); |
| 326 | |
| 327 | rmb(); |
| 328 | |
| 329 | dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len, |
| 330 | DMA_TO_DEVICE); |
| 331 | rp->skb = NULL; |
| 332 | dev_kfree_skb_irq(skb); |
| 333 | } |
| 334 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 335 | bp->tx_head = bp->tx_tail = 0; |
| 336 | } |
| 337 | |
| 338 | if (!(status & MACB_BIT(COMP))) |
| 339 | /* |
| 340 | * This may happen when a buffer becomes complete |
| 341 | * between reading the ISR and scanning the |
| 342 | * descriptors. Nothing to worry about. |
| 343 | */ |
| 344 | return; |
| 345 | |
| 346 | head = bp->tx_head; |
| 347 | for (tail = bp->tx_tail; tail != head; tail = NEXT_TX(tail)) { |
| 348 | struct ring_info *rp = &bp->tx_skb[tail]; |
| 349 | struct sk_buff *skb = rp->skb; |
| 350 | u32 bufstat; |
| 351 | |
| 352 | BUG_ON(skb == NULL); |
| 353 | |
| 354 | rmb(); |
| 355 | bufstat = bp->tx_ring[tail].ctrl; |
| 356 | |
| 357 | if (!(bufstat & MACB_BIT(TX_USED))) |
| 358 | break; |
| 359 | |
| 360 | dev_dbg(&bp->pdev->dev, "skb %u (data %p) TX complete\n", |
| 361 | tail, skb->data); |
| 362 | dma_unmap_single(&bp->pdev->dev, rp->mapping, skb->len, |
| 363 | DMA_TO_DEVICE); |
| 364 | bp->stats.tx_packets++; |
| 365 | bp->stats.tx_bytes += skb->len; |
| 366 | rp->skb = NULL; |
| 367 | dev_kfree_skb_irq(skb); |
| 368 | } |
| 369 | |
| 370 | bp->tx_tail = tail; |
| 371 | if (netif_queue_stopped(bp->dev) && |
| 372 | TX_BUFFS_AVAIL(bp) > MACB_TX_WAKEUP_THRESH) |
| 373 | netif_wake_queue(bp->dev); |
| 374 | } |
| 375 | |
| 376 | static int macb_rx_frame(struct macb *bp, unsigned int first_frag, |
| 377 | unsigned int last_frag) |
| 378 | { |
| 379 | unsigned int len; |
| 380 | unsigned int frag; |
| 381 | unsigned int offset = 0; |
| 382 | struct sk_buff *skb; |
| 383 | |
| 384 | len = MACB_BFEXT(RX_FRMLEN, bp->rx_ring[last_frag].ctrl); |
| 385 | |
| 386 | dev_dbg(&bp->pdev->dev, "macb_rx_frame frags %u - %u (len %u)\n", |
| 387 | first_frag, last_frag, len); |
| 388 | |
| 389 | skb = dev_alloc_skb(len + RX_OFFSET); |
| 390 | if (!skb) { |
| 391 | bp->stats.rx_dropped++; |
| 392 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { |
| 393 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); |
| 394 | if (frag == last_frag) |
| 395 | break; |
| 396 | } |
| 397 | wmb(); |
| 398 | return 1; |
| 399 | } |
| 400 | |
| 401 | skb_reserve(skb, RX_OFFSET); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 402 | skb->ip_summed = CHECKSUM_NONE; |
| 403 | skb_put(skb, len); |
| 404 | |
| 405 | for (frag = first_frag; ; frag = NEXT_RX(frag)) { |
| 406 | unsigned int frag_len = RX_BUFFER_SIZE; |
| 407 | |
| 408 | if (offset + frag_len > len) { |
| 409 | BUG_ON(frag != last_frag); |
| 410 | frag_len = len - offset; |
| 411 | } |
Arnaldo Carvalho de Melo | 27d7ff4 | 2007-03-31 11:55:19 -0300 | [diff] [blame] | 412 | skb_copy_to_linear_data_offset(skb, offset, |
| 413 | (bp->rx_buffers + |
| 414 | (RX_BUFFER_SIZE * frag)), |
| 415 | frag_len); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 416 | offset += RX_BUFFER_SIZE; |
| 417 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); |
| 418 | wmb(); |
| 419 | |
| 420 | if (frag == last_frag) |
| 421 | break; |
| 422 | } |
| 423 | |
| 424 | skb->protocol = eth_type_trans(skb, bp->dev); |
| 425 | |
| 426 | bp->stats.rx_packets++; |
| 427 | bp->stats.rx_bytes += len; |
| 428 | bp->dev->last_rx = jiffies; |
| 429 | dev_dbg(&bp->pdev->dev, "received skb of length %u, csum: %08x\n", |
| 430 | skb->len, skb->csum); |
| 431 | netif_receive_skb(skb); |
| 432 | |
| 433 | return 0; |
| 434 | } |
| 435 | |
| 436 | /* Mark DMA descriptors from begin up to and not including end as unused */ |
| 437 | static void discard_partial_frame(struct macb *bp, unsigned int begin, |
| 438 | unsigned int end) |
| 439 | { |
| 440 | unsigned int frag; |
| 441 | |
| 442 | for (frag = begin; frag != end; frag = NEXT_RX(frag)) |
| 443 | bp->rx_ring[frag].addr &= ~MACB_BIT(RX_USED); |
| 444 | wmb(); |
| 445 | |
| 446 | /* |
| 447 | * When this happens, the hardware stats registers for |
| 448 | * whatever caused this is updated, so we don't have to record |
| 449 | * anything. |
| 450 | */ |
| 451 | } |
| 452 | |
| 453 | static int macb_rx(struct macb *bp, int budget) |
| 454 | { |
| 455 | int received = 0; |
| 456 | unsigned int tail = bp->rx_tail; |
| 457 | int first_frag = -1; |
| 458 | |
| 459 | for (; budget > 0; tail = NEXT_RX(tail)) { |
| 460 | u32 addr, ctrl; |
| 461 | |
| 462 | rmb(); |
| 463 | addr = bp->rx_ring[tail].addr; |
| 464 | ctrl = bp->rx_ring[tail].ctrl; |
| 465 | |
| 466 | if (!(addr & MACB_BIT(RX_USED))) |
| 467 | break; |
| 468 | |
| 469 | if (ctrl & MACB_BIT(RX_SOF)) { |
| 470 | if (first_frag != -1) |
| 471 | discard_partial_frame(bp, first_frag, tail); |
| 472 | first_frag = tail; |
| 473 | } |
| 474 | |
| 475 | if (ctrl & MACB_BIT(RX_EOF)) { |
| 476 | int dropped; |
| 477 | BUG_ON(first_frag == -1); |
| 478 | |
| 479 | dropped = macb_rx_frame(bp, first_frag, tail); |
| 480 | first_frag = -1; |
| 481 | if (!dropped) { |
| 482 | received++; |
| 483 | budget--; |
| 484 | } |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | if (first_frag != -1) |
| 489 | bp->rx_tail = first_frag; |
| 490 | else |
| 491 | bp->rx_tail = tail; |
| 492 | |
| 493 | return received; |
| 494 | } |
| 495 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 496 | static int macb_poll(struct napi_struct *napi, int budget) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 497 | { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 498 | struct macb *bp = container_of(napi, struct macb, napi); |
| 499 | struct net_device *dev = bp->dev; |
| 500 | int work_done; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 501 | u32 status; |
| 502 | |
| 503 | status = macb_readl(bp, RSR); |
| 504 | macb_writel(bp, RSR, status); |
| 505 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 506 | work_done = 0; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 507 | if (!status) { |
| 508 | /* |
| 509 | * This may happen if an interrupt was pending before |
| 510 | * this function was called last time, and no packets |
| 511 | * have been received since. |
| 512 | */ |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 513 | netif_rx_complete(dev, napi); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 514 | goto out; |
| 515 | } |
| 516 | |
| 517 | dev_dbg(&bp->pdev->dev, "poll: status = %08lx, budget = %d\n", |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 518 | (unsigned long)status, budget); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 519 | |
| 520 | if (!(status & MACB_BIT(REC))) { |
| 521 | dev_warn(&bp->pdev->dev, |
| 522 | "No RX buffers complete, status = %02lx\n", |
| 523 | (unsigned long)status); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 524 | netif_rx_complete(dev, napi); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 525 | goto out; |
| 526 | } |
| 527 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 528 | work_done = macb_rx(bp, budget); |
| 529 | if (work_done < budget) |
| 530 | netif_rx_complete(dev, napi); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 531 | |
| 532 | /* |
| 533 | * We've done what we can to clean the buffers. Make sure we |
| 534 | * get notified when new packets arrive. |
| 535 | */ |
| 536 | out: |
| 537 | macb_writel(bp, IER, MACB_RX_INT_FLAGS); |
| 538 | |
| 539 | /* TODO: Handle errors */ |
| 540 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 541 | return work_done; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 542 | } |
| 543 | |
| 544 | static irqreturn_t macb_interrupt(int irq, void *dev_id) |
| 545 | { |
| 546 | struct net_device *dev = dev_id; |
| 547 | struct macb *bp = netdev_priv(dev); |
| 548 | u32 status; |
| 549 | |
| 550 | status = macb_readl(bp, ISR); |
| 551 | |
| 552 | if (unlikely(!status)) |
| 553 | return IRQ_NONE; |
| 554 | |
| 555 | spin_lock(&bp->lock); |
| 556 | |
| 557 | while (status) { |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 558 | /* close possible race with dev_close */ |
| 559 | if (unlikely(!netif_running(dev))) { |
| 560 | macb_writel(bp, IDR, ~0UL); |
| 561 | break; |
| 562 | } |
| 563 | |
| 564 | if (status & MACB_RX_INT_FLAGS) { |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 565 | if (netif_rx_schedule_prep(dev, &bp->napi)) { |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 566 | /* |
| 567 | * There's no point taking any more interrupts |
| 568 | * until we have processed the buffers |
| 569 | */ |
| 570 | macb_writel(bp, IDR, MACB_RX_INT_FLAGS); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 571 | dev_dbg(&bp->pdev->dev, |
| 572 | "scheduling RX softirq\n"); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 573 | __netif_rx_schedule(dev, &bp->napi); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 574 | } |
| 575 | } |
| 576 | |
| 577 | if (status & (MACB_BIT(TCOMP) | MACB_BIT(ISR_TUND))) |
| 578 | macb_tx(bp); |
| 579 | |
| 580 | /* |
| 581 | * Link change detection isn't possible with RMII, so we'll |
| 582 | * add that if/when we get our hands on a full-blown MII PHY. |
| 583 | */ |
| 584 | |
| 585 | if (status & MACB_BIT(HRESP)) { |
| 586 | /* |
| 587 | * TODO: Reset the hardware, and maybe move the printk |
| 588 | * to a lower-priority context as well (work queue?) |
| 589 | */ |
| 590 | printk(KERN_ERR "%s: DMA bus error: HRESP not OK\n", |
| 591 | dev->name); |
| 592 | } |
| 593 | |
| 594 | status = macb_readl(bp, ISR); |
| 595 | } |
| 596 | |
| 597 | spin_unlock(&bp->lock); |
| 598 | |
| 599 | return IRQ_HANDLED; |
| 600 | } |
| 601 | |
| 602 | static int macb_start_xmit(struct sk_buff *skb, struct net_device *dev) |
| 603 | { |
| 604 | struct macb *bp = netdev_priv(dev); |
| 605 | dma_addr_t mapping; |
| 606 | unsigned int len, entry; |
| 607 | u32 ctrl; |
| 608 | |
| 609 | #ifdef DEBUG |
| 610 | int i; |
| 611 | dev_dbg(&bp->pdev->dev, |
| 612 | "start_xmit: len %u head %p data %p tail %p end %p\n", |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 613 | skb->len, skb->head, skb->data, |
Arnaldo Carvalho de Melo | 4305b54 | 2007-04-19 20:43:29 -0700 | [diff] [blame] | 614 | skb_tail_pointer(skb), skb_end_pointer(skb)); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 615 | dev_dbg(&bp->pdev->dev, |
| 616 | "data:"); |
| 617 | for (i = 0; i < 16; i++) |
| 618 | printk(" %02x", (unsigned int)skb->data[i]); |
| 619 | printk("\n"); |
| 620 | #endif |
| 621 | |
| 622 | len = skb->len; |
| 623 | spin_lock_irq(&bp->lock); |
| 624 | |
| 625 | /* This is a hard error, log it. */ |
| 626 | if (TX_BUFFS_AVAIL(bp) < 1) { |
| 627 | netif_stop_queue(dev); |
| 628 | spin_unlock_irq(&bp->lock); |
| 629 | dev_err(&bp->pdev->dev, |
| 630 | "BUG! Tx Ring full when queue awake!\n"); |
| 631 | dev_dbg(&bp->pdev->dev, "tx_head = %u, tx_tail = %u\n", |
| 632 | bp->tx_head, bp->tx_tail); |
| 633 | return 1; |
| 634 | } |
| 635 | |
| 636 | entry = bp->tx_head; |
| 637 | dev_dbg(&bp->pdev->dev, "Allocated ring entry %u\n", entry); |
| 638 | mapping = dma_map_single(&bp->pdev->dev, skb->data, |
| 639 | len, DMA_TO_DEVICE); |
| 640 | bp->tx_skb[entry].skb = skb; |
| 641 | bp->tx_skb[entry].mapping = mapping; |
| 642 | dev_dbg(&bp->pdev->dev, "Mapped skb data %p to DMA addr %08lx\n", |
| 643 | skb->data, (unsigned long)mapping); |
| 644 | |
| 645 | ctrl = MACB_BF(TX_FRMLEN, len); |
| 646 | ctrl |= MACB_BIT(TX_LAST); |
| 647 | if (entry == (TX_RING_SIZE - 1)) |
| 648 | ctrl |= MACB_BIT(TX_WRAP); |
| 649 | |
| 650 | bp->tx_ring[entry].addr = mapping; |
| 651 | bp->tx_ring[entry].ctrl = ctrl; |
| 652 | wmb(); |
| 653 | |
| 654 | entry = NEXT_TX(entry); |
| 655 | bp->tx_head = entry; |
| 656 | |
| 657 | macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); |
| 658 | |
| 659 | if (TX_BUFFS_AVAIL(bp) < 1) |
| 660 | netif_stop_queue(dev); |
| 661 | |
| 662 | spin_unlock_irq(&bp->lock); |
| 663 | |
| 664 | dev->trans_start = jiffies; |
| 665 | |
| 666 | return 0; |
| 667 | } |
| 668 | |
| 669 | static void macb_free_consistent(struct macb *bp) |
| 670 | { |
| 671 | if (bp->tx_skb) { |
| 672 | kfree(bp->tx_skb); |
| 673 | bp->tx_skb = NULL; |
| 674 | } |
| 675 | if (bp->rx_ring) { |
| 676 | dma_free_coherent(&bp->pdev->dev, RX_RING_BYTES, |
| 677 | bp->rx_ring, bp->rx_ring_dma); |
| 678 | bp->rx_ring = NULL; |
| 679 | } |
| 680 | if (bp->tx_ring) { |
| 681 | dma_free_coherent(&bp->pdev->dev, TX_RING_BYTES, |
| 682 | bp->tx_ring, bp->tx_ring_dma); |
| 683 | bp->tx_ring = NULL; |
| 684 | } |
| 685 | if (bp->rx_buffers) { |
| 686 | dma_free_coherent(&bp->pdev->dev, |
| 687 | RX_RING_SIZE * RX_BUFFER_SIZE, |
| 688 | bp->rx_buffers, bp->rx_buffers_dma); |
| 689 | bp->rx_buffers = NULL; |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | static int macb_alloc_consistent(struct macb *bp) |
| 694 | { |
| 695 | int size; |
| 696 | |
| 697 | size = TX_RING_SIZE * sizeof(struct ring_info); |
| 698 | bp->tx_skb = kmalloc(size, GFP_KERNEL); |
| 699 | if (!bp->tx_skb) |
| 700 | goto out_err; |
| 701 | |
| 702 | size = RX_RING_BYTES; |
| 703 | bp->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, |
| 704 | &bp->rx_ring_dma, GFP_KERNEL); |
| 705 | if (!bp->rx_ring) |
| 706 | goto out_err; |
| 707 | dev_dbg(&bp->pdev->dev, |
| 708 | "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", |
| 709 | size, (unsigned long)bp->rx_ring_dma, bp->rx_ring); |
| 710 | |
| 711 | size = TX_RING_BYTES; |
| 712 | bp->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, |
| 713 | &bp->tx_ring_dma, GFP_KERNEL); |
| 714 | if (!bp->tx_ring) |
| 715 | goto out_err; |
| 716 | dev_dbg(&bp->pdev->dev, |
| 717 | "Allocated TX ring of %d bytes at %08lx (mapped %p)\n", |
| 718 | size, (unsigned long)bp->tx_ring_dma, bp->tx_ring); |
| 719 | |
| 720 | size = RX_RING_SIZE * RX_BUFFER_SIZE; |
| 721 | bp->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, |
| 722 | &bp->rx_buffers_dma, GFP_KERNEL); |
| 723 | if (!bp->rx_buffers) |
| 724 | goto out_err; |
| 725 | dev_dbg(&bp->pdev->dev, |
| 726 | "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", |
| 727 | size, (unsigned long)bp->rx_buffers_dma, bp->rx_buffers); |
| 728 | |
| 729 | return 0; |
| 730 | |
| 731 | out_err: |
| 732 | macb_free_consistent(bp); |
| 733 | return -ENOMEM; |
| 734 | } |
| 735 | |
| 736 | static void macb_init_rings(struct macb *bp) |
| 737 | { |
| 738 | int i; |
| 739 | dma_addr_t addr; |
| 740 | |
| 741 | addr = bp->rx_buffers_dma; |
| 742 | for (i = 0; i < RX_RING_SIZE; i++) { |
| 743 | bp->rx_ring[i].addr = addr; |
| 744 | bp->rx_ring[i].ctrl = 0; |
| 745 | addr += RX_BUFFER_SIZE; |
| 746 | } |
| 747 | bp->rx_ring[RX_RING_SIZE - 1].addr |= MACB_BIT(RX_WRAP); |
| 748 | |
| 749 | for (i = 0; i < TX_RING_SIZE; i++) { |
| 750 | bp->tx_ring[i].addr = 0; |
| 751 | bp->tx_ring[i].ctrl = MACB_BIT(TX_USED); |
| 752 | } |
| 753 | bp->tx_ring[TX_RING_SIZE - 1].ctrl |= MACB_BIT(TX_WRAP); |
| 754 | |
| 755 | bp->rx_tail = bp->tx_head = bp->tx_tail = 0; |
| 756 | } |
| 757 | |
| 758 | static void macb_reset_hw(struct macb *bp) |
| 759 | { |
| 760 | /* Make sure we have the write buffer for ourselves */ |
| 761 | wmb(); |
| 762 | |
| 763 | /* |
| 764 | * Disable RX and TX (XXX: Should we halt the transmission |
| 765 | * more gracefully?) |
| 766 | */ |
| 767 | macb_writel(bp, NCR, 0); |
| 768 | |
| 769 | /* Clear the stats registers (XXX: Update stats first?) */ |
| 770 | macb_writel(bp, NCR, MACB_BIT(CLRSTAT)); |
| 771 | |
| 772 | /* Clear all status flags */ |
| 773 | macb_writel(bp, TSR, ~0UL); |
| 774 | macb_writel(bp, RSR, ~0UL); |
| 775 | |
| 776 | /* Disable all interrupts */ |
| 777 | macb_writel(bp, IDR, ~0UL); |
| 778 | macb_readl(bp, ISR); |
| 779 | } |
| 780 | |
| 781 | static void macb_init_hw(struct macb *bp) |
| 782 | { |
| 783 | u32 config; |
| 784 | |
| 785 | macb_reset_hw(bp); |
| 786 | __macb_set_hwaddr(bp); |
| 787 | |
| 788 | config = macb_readl(bp, NCFGR) & MACB_BF(CLK, -1L); |
| 789 | config |= MACB_BIT(PAE); /* PAuse Enable */ |
| 790 | config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ |
| 791 | if (bp->dev->flags & IFF_PROMISC) |
| 792 | config |= MACB_BIT(CAF); /* Copy All Frames */ |
| 793 | if (!(bp->dev->flags & IFF_BROADCAST)) |
| 794 | config |= MACB_BIT(NBC); /* No BroadCast */ |
| 795 | macb_writel(bp, NCFGR, config); |
| 796 | |
| 797 | /* Initialize TX and RX buffers */ |
| 798 | macb_writel(bp, RBQP, bp->rx_ring_dma); |
| 799 | macb_writel(bp, TBQP, bp->tx_ring_dma); |
| 800 | |
| 801 | /* Enable TX and RX */ |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 802 | macb_writel(bp, NCR, MACB_BIT(RE) | MACB_BIT(TE) | MACB_BIT(MPE)); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 803 | |
| 804 | /* Enable interrupts */ |
| 805 | macb_writel(bp, IER, (MACB_BIT(RCOMP) |
| 806 | | MACB_BIT(RXUBR) |
| 807 | | MACB_BIT(ISR_TUND) |
| 808 | | MACB_BIT(ISR_RLE) |
| 809 | | MACB_BIT(TXERR) |
| 810 | | MACB_BIT(TCOMP) |
| 811 | | MACB_BIT(ISR_ROVR) |
| 812 | | MACB_BIT(HRESP))); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 813 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 814 | } |
| 815 | |
Patrice Vilchez | 446ebd0 | 2007-07-12 19:07:25 +0200 | [diff] [blame] | 816 | /* |
| 817 | * The hash address register is 64 bits long and takes up two |
| 818 | * locations in the memory map. The least significant bits are stored |
| 819 | * in EMAC_HSL and the most significant bits in EMAC_HSH. |
| 820 | * |
| 821 | * The unicast hash enable and the multicast hash enable bits in the |
| 822 | * network configuration register enable the reception of hash matched |
| 823 | * frames. The destination address is reduced to a 6 bit index into |
| 824 | * the 64 bit hash register using the following hash function. The |
| 825 | * hash function is an exclusive or of every sixth bit of the |
| 826 | * destination address. |
| 827 | * |
| 828 | * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47] |
| 829 | * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46] |
| 830 | * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45] |
| 831 | * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44] |
| 832 | * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43] |
| 833 | * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42] |
| 834 | * |
| 835 | * da[0] represents the least significant bit of the first byte |
| 836 | * received, that is, the multicast/unicast indicator, and da[47] |
| 837 | * represents the most significant bit of the last byte received. If |
| 838 | * the hash index, hi[n], points to a bit that is set in the hash |
| 839 | * register then the frame will be matched according to whether the |
| 840 | * frame is multicast or unicast. A multicast match will be signalled |
| 841 | * if the multicast hash enable bit is set, da[0] is 1 and the hash |
| 842 | * index points to a bit set in the hash register. A unicast match |
| 843 | * will be signalled if the unicast hash enable bit is set, da[0] is 0 |
| 844 | * and the hash index points to a bit set in the hash register. To |
| 845 | * receive all multicast frames, the hash register should be set with |
| 846 | * all ones and the multicast hash enable bit should be set in the |
| 847 | * network configuration register. |
| 848 | */ |
| 849 | |
| 850 | static inline int hash_bit_value(int bitnr, __u8 *addr) |
| 851 | { |
| 852 | if (addr[bitnr / 8] & (1 << (bitnr % 8))) |
| 853 | return 1; |
| 854 | return 0; |
| 855 | } |
| 856 | |
| 857 | /* |
| 858 | * Return the hash index value for the specified address. |
| 859 | */ |
| 860 | static int hash_get_index(__u8 *addr) |
| 861 | { |
| 862 | int i, j, bitval; |
| 863 | int hash_index = 0; |
| 864 | |
| 865 | for (j = 0; j < 6; j++) { |
| 866 | for (i = 0, bitval = 0; i < 8; i++) |
| 867 | bitval ^= hash_bit_value(i*6 + j, addr); |
| 868 | |
| 869 | hash_index |= (bitval << j); |
| 870 | } |
| 871 | |
| 872 | return hash_index; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * Add multicast addresses to the internal multicast-hash table. |
| 877 | */ |
| 878 | static void macb_sethashtable(struct net_device *dev) |
| 879 | { |
| 880 | struct dev_mc_list *curr; |
| 881 | unsigned long mc_filter[2]; |
| 882 | unsigned int i, bitnr; |
| 883 | struct macb *bp = netdev_priv(dev); |
| 884 | |
| 885 | mc_filter[0] = mc_filter[1] = 0; |
| 886 | |
| 887 | curr = dev->mc_list; |
| 888 | for (i = 0; i < dev->mc_count; i++, curr = curr->next) { |
| 889 | if (!curr) break; /* unexpected end of list */ |
| 890 | |
| 891 | bitnr = hash_get_index(curr->dmi_addr); |
| 892 | mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); |
| 893 | } |
| 894 | |
| 895 | macb_writel(bp, HRB, mc_filter[0]); |
| 896 | macb_writel(bp, HRT, mc_filter[1]); |
| 897 | } |
| 898 | |
| 899 | /* |
| 900 | * Enable/Disable promiscuous and multicast modes. |
| 901 | */ |
| 902 | static void macb_set_rx_mode(struct net_device *dev) |
| 903 | { |
| 904 | unsigned long cfg; |
| 905 | struct macb *bp = netdev_priv(dev); |
| 906 | |
| 907 | cfg = macb_readl(bp, NCFGR); |
| 908 | |
| 909 | if (dev->flags & IFF_PROMISC) |
| 910 | /* Enable promiscuous mode */ |
| 911 | cfg |= MACB_BIT(CAF); |
| 912 | else if (dev->flags & (~IFF_PROMISC)) |
| 913 | /* Disable promiscuous mode */ |
| 914 | cfg &= ~MACB_BIT(CAF); |
| 915 | |
| 916 | if (dev->flags & IFF_ALLMULTI) { |
| 917 | /* Enable all multicast mode */ |
| 918 | macb_writel(bp, HRB, -1); |
| 919 | macb_writel(bp, HRT, -1); |
| 920 | cfg |= MACB_BIT(NCFGR_MTI); |
| 921 | } else if (dev->mc_count > 0) { |
| 922 | /* Enable specific multicasts */ |
| 923 | macb_sethashtable(dev); |
| 924 | cfg |= MACB_BIT(NCFGR_MTI); |
| 925 | } else if (dev->flags & (~IFF_ALLMULTI)) { |
| 926 | /* Disable all multicast mode */ |
| 927 | macb_writel(bp, HRB, 0); |
| 928 | macb_writel(bp, HRT, 0); |
| 929 | cfg &= ~MACB_BIT(NCFGR_MTI); |
| 930 | } |
| 931 | |
| 932 | macb_writel(bp, NCFGR, cfg); |
| 933 | } |
| 934 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 935 | static int macb_open(struct net_device *dev) |
| 936 | { |
| 937 | struct macb *bp = netdev_priv(dev); |
| 938 | int err; |
| 939 | |
| 940 | dev_dbg(&bp->pdev->dev, "open\n"); |
| 941 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 942 | /* if the phy is not yet register, retry later*/ |
| 943 | if (!bp->phy_dev) |
| 944 | return -EAGAIN; |
| 945 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 946 | if (!is_valid_ether_addr(dev->dev_addr)) |
| 947 | return -EADDRNOTAVAIL; |
| 948 | |
| 949 | err = macb_alloc_consistent(bp); |
| 950 | if (err) { |
| 951 | printk(KERN_ERR |
| 952 | "%s: Unable to allocate DMA memory (error %d)\n", |
| 953 | dev->name, err); |
| 954 | return err; |
| 955 | } |
| 956 | |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 957 | napi_enable(&bp->napi); |
| 958 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 959 | macb_init_rings(bp); |
| 960 | macb_init_hw(bp); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 961 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 962 | /* schedule a link state check */ |
| 963 | phy_start(bp->phy_dev); |
| 964 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 965 | netif_start_queue(dev); |
| 966 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 967 | return 0; |
| 968 | } |
| 969 | |
| 970 | static int macb_close(struct net_device *dev) |
| 971 | { |
| 972 | struct macb *bp = netdev_priv(dev); |
| 973 | unsigned long flags; |
| 974 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 975 | netif_stop_queue(dev); |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 976 | napi_disable(&bp->napi); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 977 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 978 | if (bp->phy_dev) |
| 979 | phy_stop(bp->phy_dev); |
| 980 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 981 | spin_lock_irqsave(&bp->lock, flags); |
| 982 | macb_reset_hw(bp); |
| 983 | netif_carrier_off(dev); |
| 984 | spin_unlock_irqrestore(&bp->lock, flags); |
| 985 | |
| 986 | macb_free_consistent(bp); |
| 987 | |
| 988 | return 0; |
| 989 | } |
| 990 | |
| 991 | static struct net_device_stats *macb_get_stats(struct net_device *dev) |
| 992 | { |
| 993 | struct macb *bp = netdev_priv(dev); |
| 994 | struct net_device_stats *nstat = &bp->stats; |
| 995 | struct macb_stats *hwstat = &bp->hw_stats; |
| 996 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 997 | /* read stats from hardware */ |
| 998 | macb_update_stats(bp); |
| 999 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1000 | /* Convert HW stats into netdevice stats */ |
| 1001 | nstat->rx_errors = (hwstat->rx_fcs_errors + |
| 1002 | hwstat->rx_align_errors + |
| 1003 | hwstat->rx_resource_errors + |
| 1004 | hwstat->rx_overruns + |
| 1005 | hwstat->rx_oversize_pkts + |
| 1006 | hwstat->rx_jabbers + |
| 1007 | hwstat->rx_undersize_pkts + |
| 1008 | hwstat->sqe_test_errors + |
| 1009 | hwstat->rx_length_mismatch); |
| 1010 | nstat->tx_errors = (hwstat->tx_late_cols + |
| 1011 | hwstat->tx_excessive_cols + |
| 1012 | hwstat->tx_underruns + |
| 1013 | hwstat->tx_carrier_errors); |
| 1014 | nstat->collisions = (hwstat->tx_single_cols + |
| 1015 | hwstat->tx_multiple_cols + |
| 1016 | hwstat->tx_excessive_cols); |
| 1017 | nstat->rx_length_errors = (hwstat->rx_oversize_pkts + |
| 1018 | hwstat->rx_jabbers + |
| 1019 | hwstat->rx_undersize_pkts + |
| 1020 | hwstat->rx_length_mismatch); |
| 1021 | nstat->rx_over_errors = hwstat->rx_resource_errors; |
| 1022 | nstat->rx_crc_errors = hwstat->rx_fcs_errors; |
| 1023 | nstat->rx_frame_errors = hwstat->rx_align_errors; |
| 1024 | nstat->rx_fifo_errors = hwstat->rx_overruns; |
| 1025 | /* XXX: What does "missed" mean? */ |
| 1026 | nstat->tx_aborted_errors = hwstat->tx_excessive_cols; |
| 1027 | nstat->tx_carrier_errors = hwstat->tx_carrier_errors; |
| 1028 | nstat->tx_fifo_errors = hwstat->tx_underruns; |
| 1029 | /* Don't know about heartbeat or window errors... */ |
| 1030 | |
| 1031 | return nstat; |
| 1032 | } |
| 1033 | |
| 1034 | static int macb_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1035 | { |
| 1036 | struct macb *bp = netdev_priv(dev); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1037 | struct phy_device *phydev = bp->phy_dev; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1038 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1039 | if (!phydev) |
| 1040 | return -ENODEV; |
| 1041 | |
| 1042 | return phy_ethtool_gset(phydev, cmd); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1043 | } |
| 1044 | |
| 1045 | static int macb_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) |
| 1046 | { |
| 1047 | struct macb *bp = netdev_priv(dev); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1048 | struct phy_device *phydev = bp->phy_dev; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1049 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1050 | if (!phydev) |
| 1051 | return -ENODEV; |
| 1052 | |
| 1053 | return phy_ethtool_sset(phydev, cmd); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1054 | } |
| 1055 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1056 | static void macb_get_drvinfo(struct net_device *dev, |
| 1057 | struct ethtool_drvinfo *info) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1058 | { |
| 1059 | struct macb *bp = netdev_priv(dev); |
| 1060 | |
| 1061 | strcpy(info->driver, bp->pdev->dev.driver->name); |
| 1062 | strcpy(info->version, "$Revision: 1.14 $"); |
| 1063 | strcpy(info->bus_info, bp->pdev->dev.bus_id); |
| 1064 | } |
| 1065 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1066 | static struct ethtool_ops macb_ethtool_ops = { |
| 1067 | .get_settings = macb_get_settings, |
| 1068 | .set_settings = macb_set_settings, |
| 1069 | .get_drvinfo = macb_get_drvinfo, |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1070 | .get_link = ethtool_op_get_link, |
| 1071 | }; |
| 1072 | |
| 1073 | static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) |
| 1074 | { |
| 1075 | struct macb *bp = netdev_priv(dev); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1076 | struct phy_device *phydev = bp->phy_dev; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1077 | |
| 1078 | if (!netif_running(dev)) |
| 1079 | return -EINVAL; |
| 1080 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1081 | if (!phydev) |
| 1082 | return -ENODEV; |
| 1083 | |
| 1084 | return phy_mii_ioctl(phydev, if_mii(rq), cmd); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1085 | } |
| 1086 | |
Haavard Skinnemoen | 06c3fd6 | 2008-01-31 13:10:22 +0100 | [diff] [blame] | 1087 | static int __init macb_probe(struct platform_device *pdev) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1088 | { |
| 1089 | struct eth_platform_data *pdata; |
| 1090 | struct resource *regs; |
| 1091 | struct net_device *dev; |
| 1092 | struct macb *bp; |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1093 | struct phy_device *phydev; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1094 | unsigned long pclk_hz; |
| 1095 | u32 config; |
| 1096 | int err = -ENXIO; |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1097 | DECLARE_MAC_BUF(mac); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1098 | |
| 1099 | regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| 1100 | if (!regs) { |
| 1101 | dev_err(&pdev->dev, "no mmio resource defined\n"); |
| 1102 | goto err_out; |
| 1103 | } |
| 1104 | |
| 1105 | err = -ENOMEM; |
| 1106 | dev = alloc_etherdev(sizeof(*bp)); |
| 1107 | if (!dev) { |
| 1108 | dev_err(&pdev->dev, "etherdev alloc failed, aborting.\n"); |
| 1109 | goto err_out; |
| 1110 | } |
| 1111 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1112 | SET_NETDEV_DEV(dev, &pdev->dev); |
| 1113 | |
| 1114 | /* TODO: Actually, we have some interesting features... */ |
| 1115 | dev->features |= 0; |
| 1116 | |
| 1117 | bp = netdev_priv(dev); |
| 1118 | bp->pdev = pdev; |
| 1119 | bp->dev = dev; |
| 1120 | |
| 1121 | spin_lock_init(&bp->lock); |
| 1122 | |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1123 | #if defined(CONFIG_ARCH_AT91) |
| 1124 | bp->pclk = clk_get(&pdev->dev, "macb_clk"); |
| 1125 | if (IS_ERR(bp->pclk)) { |
| 1126 | dev_err(&pdev->dev, "failed to get macb_clk\n"); |
| 1127 | goto err_out_free_dev; |
| 1128 | } |
| 1129 | clk_enable(bp->pclk); |
| 1130 | #else |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1131 | bp->pclk = clk_get(&pdev->dev, "pclk"); |
| 1132 | if (IS_ERR(bp->pclk)) { |
| 1133 | dev_err(&pdev->dev, "failed to get pclk\n"); |
| 1134 | goto err_out_free_dev; |
| 1135 | } |
| 1136 | bp->hclk = clk_get(&pdev->dev, "hclk"); |
| 1137 | if (IS_ERR(bp->hclk)) { |
| 1138 | dev_err(&pdev->dev, "failed to get hclk\n"); |
| 1139 | goto err_out_put_pclk; |
| 1140 | } |
| 1141 | |
| 1142 | clk_enable(bp->pclk); |
| 1143 | clk_enable(bp->hclk); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1144 | #endif |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1145 | |
| 1146 | bp->regs = ioremap(regs->start, regs->end - regs->start + 1); |
| 1147 | if (!bp->regs) { |
| 1148 | dev_err(&pdev->dev, "failed to map registers, aborting.\n"); |
| 1149 | err = -ENOMEM; |
| 1150 | goto err_out_disable_clocks; |
| 1151 | } |
| 1152 | |
| 1153 | dev->irq = platform_get_irq(pdev, 0); |
Thomas Gleixner | 38515e9 | 2007-02-14 00:33:16 -0800 | [diff] [blame] | 1154 | err = request_irq(dev->irq, macb_interrupt, IRQF_SAMPLE_RANDOM, |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1155 | dev->name, dev); |
| 1156 | if (err) { |
| 1157 | printk(KERN_ERR |
| 1158 | "%s: Unable to request IRQ %d (error %d)\n", |
| 1159 | dev->name, dev->irq, err); |
| 1160 | goto err_out_iounmap; |
| 1161 | } |
| 1162 | |
| 1163 | dev->open = macb_open; |
| 1164 | dev->stop = macb_close; |
| 1165 | dev->hard_start_xmit = macb_start_xmit; |
| 1166 | dev->get_stats = macb_get_stats; |
Patrice Vilchez | 446ebd0 | 2007-07-12 19:07:25 +0200 | [diff] [blame] | 1167 | dev->set_multicast_list = macb_set_rx_mode; |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1168 | dev->do_ioctl = macb_ioctl; |
Stephen Hemminger | bea3348 | 2007-10-03 16:41:36 -0700 | [diff] [blame] | 1169 | netif_napi_add(dev, &bp->napi, macb_poll, 64); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1170 | dev->ethtool_ops = &macb_ethtool_ops; |
| 1171 | |
| 1172 | dev->base_addr = regs->start; |
| 1173 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1174 | /* Set MII management clock divider */ |
| 1175 | pclk_hz = clk_get_rate(bp->pclk); |
| 1176 | if (pclk_hz <= 20000000) |
| 1177 | config = MACB_BF(CLK, MACB_CLK_DIV8); |
| 1178 | else if (pclk_hz <= 40000000) |
| 1179 | config = MACB_BF(CLK, MACB_CLK_DIV16); |
| 1180 | else if (pclk_hz <= 80000000) |
| 1181 | config = MACB_BF(CLK, MACB_CLK_DIV32); |
| 1182 | else |
| 1183 | config = MACB_BF(CLK, MACB_CLK_DIV64); |
| 1184 | macb_writel(bp, NCFGR, config); |
| 1185 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1186 | macb_get_hwaddr(bp); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1187 | pdata = pdev->dev.platform_data; |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1188 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1189 | if (pdata && pdata->is_rmii) |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1190 | #if defined(CONFIG_ARCH_AT91) |
| 1191 | macb_writel(bp, USRIO, (MACB_BIT(RMII) | MACB_BIT(CLKEN)) ); |
| 1192 | #else |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1193 | macb_writel(bp, USRIO, 0); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1194 | #endif |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1195 | else |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1196 | #if defined(CONFIG_ARCH_AT91) |
| 1197 | macb_writel(bp, USRIO, MACB_BIT(CLKEN)); |
| 1198 | #else |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1199 | macb_writel(bp, USRIO, MACB_BIT(MII)); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1200 | #endif |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1201 | |
| 1202 | bp->tx_pending = DEF_TX_RING_PENDING; |
| 1203 | |
| 1204 | err = register_netdev(dev); |
| 1205 | if (err) { |
| 1206 | dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); |
| 1207 | goto err_out_free_irq; |
| 1208 | } |
| 1209 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1210 | if (macb_mii_init(bp) != 0) { |
| 1211 | goto err_out_unregister_netdev; |
| 1212 | } |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1213 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1214 | platform_set_drvdata(pdev, dev); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1215 | |
| 1216 | printk(KERN_INFO "%s: Atmel MACB at 0x%08lx irq %d " |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1217 | "(%s)\n", |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1218 | dev->name, dev->base_addr, dev->irq, |
Joe Perches | 0795af5 | 2007-10-03 17:59:30 -0700 | [diff] [blame] | 1219 | print_mac(mac, dev->dev_addr)); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1220 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1221 | phydev = bp->phy_dev; |
| 1222 | printk(KERN_INFO "%s: attached PHY driver [%s] " |
| 1223 | "(mii_bus:phy_addr=%s, irq=%d)\n", |
| 1224 | dev->name, phydev->drv->name, phydev->dev.bus_id, phydev->irq); |
| 1225 | |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1226 | return 0; |
| 1227 | |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1228 | err_out_unregister_netdev: |
| 1229 | unregister_netdev(dev); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1230 | err_out_free_irq: |
| 1231 | free_irq(dev->irq, dev); |
| 1232 | err_out_iounmap: |
| 1233 | iounmap(bp->regs); |
| 1234 | err_out_disable_clocks: |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1235 | #ifndef CONFIG_ARCH_AT91 |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1236 | clk_disable(bp->hclk); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1237 | clk_put(bp->hclk); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1238 | #endif |
| 1239 | clk_disable(bp->pclk); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1240 | #ifndef CONFIG_ARCH_AT91 |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1241 | err_out_put_pclk: |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1242 | #endif |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1243 | clk_put(bp->pclk); |
| 1244 | err_out_free_dev: |
| 1245 | free_netdev(dev); |
| 1246 | err_out: |
| 1247 | platform_set_drvdata(pdev, NULL); |
| 1248 | return err; |
| 1249 | } |
| 1250 | |
Haavard Skinnemoen | 06c3fd6 | 2008-01-31 13:10:22 +0100 | [diff] [blame] | 1251 | static int __exit macb_remove(struct platform_device *pdev) |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1252 | { |
| 1253 | struct net_device *dev; |
| 1254 | struct macb *bp; |
| 1255 | |
| 1256 | dev = platform_get_drvdata(pdev); |
| 1257 | |
| 1258 | if (dev) { |
| 1259 | bp = netdev_priv(dev); |
Atsushi Nemoto | 84b7901 | 2008-04-10 23:30:07 +0900 | [diff] [blame] | 1260 | if (bp->phy_dev) |
| 1261 | phy_disconnect(bp->phy_dev); |
frederic RODO | 6c36a70 | 2007-07-12 19:07:24 +0200 | [diff] [blame] | 1262 | mdiobus_unregister(&bp->mii_bus); |
| 1263 | kfree(bp->mii_bus.irq); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1264 | unregister_netdev(dev); |
| 1265 | free_irq(dev->irq, dev); |
| 1266 | iounmap(bp->regs); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1267 | #ifndef CONFIG_ARCH_AT91 |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1268 | clk_disable(bp->hclk); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1269 | clk_put(bp->hclk); |
Andrew Victor | 0cc8674 | 2007-02-07 16:40:44 +0100 | [diff] [blame] | 1270 | #endif |
| 1271 | clk_disable(bp->pclk); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1272 | clk_put(bp->pclk); |
| 1273 | free_netdev(dev); |
| 1274 | platform_set_drvdata(pdev, NULL); |
| 1275 | } |
| 1276 | |
| 1277 | return 0; |
| 1278 | } |
| 1279 | |
| 1280 | static struct platform_driver macb_driver = { |
Haavard Skinnemoen | 06c3fd6 | 2008-01-31 13:10:22 +0100 | [diff] [blame] | 1281 | .remove = __exit_p(macb_remove), |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1282 | .driver = { |
| 1283 | .name = "macb", |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 1284 | .owner = THIS_MODULE, |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1285 | }, |
| 1286 | }; |
| 1287 | |
| 1288 | static int __init macb_init(void) |
| 1289 | { |
Haavard Skinnemoen | 06c3fd6 | 2008-01-31 13:10:22 +0100 | [diff] [blame] | 1290 | return platform_driver_probe(&macb_driver, macb_probe); |
Haavard Skinnemoen | 89e5785 | 2006-11-09 14:51:17 +0100 | [diff] [blame] | 1291 | } |
| 1292 | |
| 1293 | static void __exit macb_exit(void) |
| 1294 | { |
| 1295 | platform_driver_unregister(&macb_driver); |
| 1296 | } |
| 1297 | |
| 1298 | module_init(macb_init); |
| 1299 | module_exit(macb_exit); |
| 1300 | |
| 1301 | MODULE_LICENSE("GPL"); |
| 1302 | MODULE_DESCRIPTION("Atmel MACB Ethernet driver"); |
| 1303 | MODULE_AUTHOR("Haavard Skinnemoen <hskinnemoen@atmel.com>"); |
Kay Sievers | 72abb46 | 2008-04-18 13:50:44 -0700 | [diff] [blame] | 1304 | MODULE_ALIAS("platform:macb"); |