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