drivers/net/ethernet/i825xx/sni_82596.c

   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
  24 static 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
  40 MODULE_AUTHOR("Thomas Bogendoerfer");
  41 MODULE_DESCRIPTION("i82596 driver");
  42 MODULE_LICENSE("GPL");
  43 MODULE_ALIAS("platform:snirm_82596");
  44 module_param(i596_debug, int, 0);
  45 MODULE_PARM_DESC(i596_debug, "82596 debug mask");
  46
  47 static 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
  55 static 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
  75 static 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
 138 probe_failed:
 139         free_netdev(netdevice);
 140 probe_failed_free_ca:
 141         iounmap(ca_addr);
 142 probe_failed_free_mpu:
 143         iounmap(mpu_addr);
 144         return retval;
 145 }
 146
 147 static 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
 161 static 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
 169 static 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
 176 static void __exit sni_82596_exit(void)
 177 {
 178         platform_driver_unregister(&sni_82596_driver);
 179 }
 180
 181 module_init(sni_82596_init);
 182 module_exit(sni_82596_exit);