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