linux/drivers/net/ethernet/i825xx/sni_82596.c
<<
>>
Prefs
   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/init.h>
  17#include <linux/types.h>
  18#include <linux/bitops.h>
  19#include <linux/platform_device.h>
  20#include <linux/io.h>
  21#include <linux/irq.h>
  22
  23#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
  24
  25static const char sni_82596_string[] = "snirm_82596";
  26
  27#define DMA_ALLOC                      dma_alloc_coherent
  28#define DMA_FREE                       dma_free_coherent
  29#define DMA_WBACK(priv, addr, len)     do { } while (0)
  30#define DMA_INV(priv, addr, len)       do { } while (0)
  31#define DMA_WBACK_INV(priv, addr, len) do { } while (0)
  32
  33#define SYSBUS      0x00004400
  34
  35/* big endian CPU, 82596 little endian */
  36#define SWAP32(x)   cpu_to_le32((u32)(x))
  37#define SWAP16(x)   cpu_to_le16((u16)(x))
  38
  39#define OPT_MPU_16BIT    0x01
  40
  41#include "lib82596.c"
  42
  43MODULE_AUTHOR("Thomas Bogendoerfer");
  44MODULE_DESCRIPTION("i82596 driver");
  45MODULE_LICENSE("GPL");
  46MODULE_ALIAS("platform:snirm_82596");
  47module_param(i596_debug, int, 0);
  48MODULE_PARM_DESC(i596_debug, "82596 debug mask");
  49
  50static inline void ca(struct net_device *dev)
  51{
  52        struct i596_private *lp = netdev_priv(dev);
  53
  54        writel(0, lp->ca);
  55}
  56
  57
  58static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
  59{
  60        struct i596_private *lp = netdev_priv(dev);
  61
  62        u32 v = (u32) (c) | (u32) (x);
  63
  64        if (lp->options & OPT_MPU_16BIT) {
  65                writew(v & 0xffff, lp->mpu_port);
  66                wmb();  /* order writes to MPU port */
  67                udelay(1);
  68                writew(v >> 16, lp->mpu_port);
  69        } else {
  70                writel(v, lp->mpu_port);
  71                wmb();  /* order writes to MPU port */
  72                udelay(1);
  73                writel(v, lp->mpu_port);
  74        }
  75}
  76
  77
  78static int sni_82596_probe(struct platform_device *dev)
  79{
  80        struct  net_device *netdevice;
  81        struct i596_private *lp;
  82        struct  resource *res, *ca, *idprom, *options;
  83        int     retval = -ENOMEM;
  84        void __iomem *mpu_addr;
  85        void __iomem *ca_addr;
  86        u8 __iomem *eth_addr;
  87
  88        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
  89        ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
  90        options = platform_get_resource(dev, 0, 0);
  91        idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
  92        if (!res || !ca || !options || !idprom)
  93                return -ENODEV;
  94        mpu_addr = ioremap_nocache(res->start, 4);
  95        if (!mpu_addr)
  96                return -ENOMEM;
  97        ca_addr = ioremap_nocache(ca->start, 4);
  98        if (!ca_addr)
  99                goto probe_failed_free_mpu;
 100
 101        printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
 102
 103        netdevice = alloc_etherdev(sizeof(struct i596_private));
 104        if (!netdevice)
 105                goto probe_failed_free_ca;
 106
 107        SET_NETDEV_DEV(netdevice, &dev->dev);
 108        platform_set_drvdata (dev, netdevice);
 109
 110        netdevice->base_addr = res->start;
 111        netdevice->irq = platform_get_irq(dev, 0);
 112
 113        eth_addr = ioremap_nocache(idprom->start, 0x10);
 114        if (!eth_addr)
 115                goto probe_failed;
 116
 117        /* someone seems to like messed up stuff */
 118        netdevice->dev_addr[0] = readb(eth_addr + 0x0b);
 119        netdevice->dev_addr[1] = readb(eth_addr + 0x0a);
 120        netdevice->dev_addr[2] = readb(eth_addr + 0x09);
 121        netdevice->dev_addr[3] = readb(eth_addr + 0x08);
 122        netdevice->dev_addr[4] = readb(eth_addr + 0x07);
 123        netdevice->dev_addr[5] = readb(eth_addr + 0x06);
 124        iounmap(eth_addr);
 125
 126        if (!netdevice->irq) {
 127                printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
 128                        __FILE__, netdevice->base_addr);
 129                goto probe_failed;
 130        }
 131
 132        lp = netdev_priv(netdevice);
 133        lp->options = options->flags & IORESOURCE_BITS;
 134        lp->ca = ca_addr;
 135        lp->mpu_port = mpu_addr;
 136
 137        retval = i82596_probe(netdevice);
 138        if (retval == 0)
 139                return 0;
 140
 141probe_failed:
 142        free_netdev(netdevice);
 143probe_failed_free_ca:
 144        iounmap(ca_addr);
 145probe_failed_free_mpu:
 146        iounmap(mpu_addr);
 147        return retval;
 148}
 149
 150static int sni_82596_driver_remove(struct platform_device *pdev)
 151{
 152        struct net_device *dev = platform_get_drvdata(pdev);
 153        struct i596_private *lp = netdev_priv(dev);
 154
 155        unregister_netdev(dev);
 156        DMA_FREE(dev->dev.parent, sizeof(struct i596_private),
 157                 lp->dma, lp->dma_addr);
 158        iounmap(lp->ca);
 159        iounmap(lp->mpu_port);
 160        free_netdev (dev);
 161        return 0;
 162}
 163
 164static struct platform_driver sni_82596_driver = {
 165        .probe  = sni_82596_probe,
 166        .remove = sni_82596_driver_remove,
 167        .driver = {
 168                .name   = sni_82596_string,
 169                .owner  = THIS_MODULE,
 170        },
 171};
 172
 173static int sni_82596_init(void)
 174{
 175        printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
 176        return platform_driver_register(&sni_82596_driver);
 177}
 178
 179
 180static void __exit sni_82596_exit(void)
 181{
 182        platform_driver_unregister(&sni_82596_driver);
 183}
 184
 185module_init(sni_82596_init);
 186module_exit(sni_82596_exit);
 187