LXR linux/drivers/net/ethernet/i825xx/sni

   1/*
   2 * sni_82596.c -- driver for intel 82596 ethernet controller, as
   3 *                used in older SNI RM machines
   4 */
   5
   6#include <linux/module.h>
   7#include <linux/kernel.h>
   8#include <linux/string.h>
   9#include <linux/errno.h>
  10#include <linux/ioport.h>
  11#include <linux/interrupt.h>
  12#include <linux/delay.h>
  13#include <linux/netdevice.h>
  14#include <linux/etherdevice.h>
  15#include <linux/skbuff.h>
  16#include <linux/types.h>
  17#include <linux/bitops.h>
  18#include <linux/platform_device.h>
  19#include <linux/io.h>
  20#include <linux/irq.h>
  21
  22#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
  23
  24static const char sni_82596_string[] = "snirm_82596";
  25
  26#define DMA_WBACK(priv, addr, len)     do { } while (0)
  27#define DMA_INV(priv, addr, len)       do { } while (0)
  28#define DMA_WBACK_INV(priv, addr, len) do { } while (0)
  29
  30#define SYSBUS      0x00004400
  31
  32/* big endian CPU, 82596 little endian */
  33#define SWAP32(x)   cpu_to_le32((u32)(x))
  34#define SWAP16(x)   cpu_to_le16((u16)(x))
  35
  36#define OPT_MPU_16BIT    0x01
  37
  38#include "lib82596.c"
  39
  40MODULE_AUTHOR("Thomas Bogendoerfer");
  41MODULE_DESCRIPTION("i82596 driver");
  42MODULE_LICENSE("GPL");
  43MODULE_ALIAS("platform:snirm_82596");
  44module_param(i596_debug, int, 0);
  45MODULE_PARM_DESC(i596_debug, "82596 debug mask");
  46
  47static inline void ca(struct net_device *dev)
  48{
  49        struct i596_private *lp = netdev_priv(dev);
  50
  51        writel(0, lp->ca);
  52}
  53
  54
  55static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
  56{
  57        struct i596_private *lp = netdev_priv(dev);
  58
  59        u32 v = (u32) (c) | (u32) (x);
  60
  61        if (lp->options & OPT_MPU_16BIT) {
  62                writew(v & 0xffff, lp->mpu_port);
  63                wmb();  /* order writes to MPU port */
  64                udelay(1);
  65                writew(v >> 16, lp->mpu_port);
  66        } else {
  67                writel(v, lp->mpu_port);
  68                wmb();  /* order writes to MPU port */
  69                udelay(1);
  70                writel(v, lp->mpu_port);
  71        }
  72}
  73
  74
  75static int sni_82596_probe(struct platform_device *dev)
  76{
  77        struct  net_device *netdevice;
  78        struct i596_private *lp;
  79        struct  resource *res, *ca, *idprom, *options;
  80        int     retval = -ENOMEM;
  81        void __iomem *mpu_addr;
  82        void __iomem *ca_addr;
  83        u8 __iomem *eth_addr;
  84
  85        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  86        ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
  87        options = platform_get_resource(dev, 0, 0);
  88        idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
  89        if (!res || !ca || !options || !idprom)
  90                return -ENODEV;
  91        mpu_addr = ioremap_nocache(res->start, 4);
  92        if (!mpu_addr)
  93                return -ENOMEM;
  94        ca_addr = ioremap_nocache(ca->start, 4);
  95        if (!ca_addr)
  96                goto probe_failed_free_mpu;
  97
  98        printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
  99
 100        netdevice = alloc_etherdev(sizeof(struct i596_private));
 101        if (!netdevice)
 102                goto probe_failed_free_ca;
 103
 104        SET_NETDEV_DEV(netdevice, &dev->dev);
 105        platform_set_drvdata (dev, netdevice);
 106
 107        netdevice->base_addr = res->start;
 108        netdevice->irq = platform_get_irq(dev, 0);
 109
 110        eth_addr = ioremap_nocache(idprom->start, 0x10);
 111        if (!eth_addr)
 112                goto probe_failed;
 113
 114        /* someone seems to like messed up stuff */
 115        netdevice->dev_addr[0] = readb(eth_addr + 0x0b);
 116        netdevice->dev_addr[1] = readb(eth_addr + 0x0a);
 117        netdevice->dev_addr[2] = readb(eth_addr + 0x09);
 118        netdevice->dev_addr[3] = readb(eth_addr + 0x08);
 119        netdevice->dev_addr[4] = readb(eth_addr + 0x07);
 120        netdevice->dev_addr[5] = readb(eth_addr + 0x06);
 121        iounmap(eth_addr);
 122
 123        if (!netdevice->irq) {
 124                printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
 125                        __FILE__, netdevice->base_addr);
 126                goto probe_failed;
 127        }
 128
 129        lp = netdev_priv(netdevice);
 130        lp->options = options->flags & IORESOURCE_BITS;
 131        lp->ca = ca_addr;
 132        lp->mpu_port = mpu_addr;
 133
 134        retval = i82596_probe(netdevice);
 135        if (retval == 0)
 136                return 0;
 137
 138probe_failed:
 139        free_netdev(netdevice);
 140probe_failed_free_ca:
 141        iounmap(ca_addr);
 142probe_failed_free_mpu:
 143        iounmap(mpu_addr);
 144        return retval;
 145}
 146
 147static int sni_82596_driver_remove(struct platform_device *pdev)
 148{
 149        struct net_device *dev = platform_get_drvdata(pdev);
 150        struct i596_private *lp = netdev_priv(dev);
 151
 152        unregister_netdev(dev);
 153        dma_free_attrs(dev->dev.parent, sizeof(struct i596_private), lp->dma,
 154                       lp->dma_addr, DMA_ATTR_NON_CONSISTENT);
 155        iounmap(lp->ca);
 156        iounmap(lp->mpu_port);
 157        free_netdev (dev);
 158        return 0;
 159}
 160
 161static struct platform_driver sni_82596_driver = {
 162        .probe  = sni_82596_probe,
 163        .remove = sni_82596_driver_remove,
 164        .driver = {
 165                .name   = sni_82596_string,
 166        },
 167};
 168
 169static int sni_82596_init(void)
 170{
 171        printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
 172        return platform_driver_register(&sni_82596_driver);
 173}
 174
 175
 176static void __exit sni_82596_exit(void)
 177{
 178        platform_driver_unregister(&sni_82596_driver);
 179}
 180
 181module_init(sni_82596_init);
 182module_exit(sni_82596_exit);
 183