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/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
  25 static 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
  43 MODULE_AUTHOR("Thomas Bogendoerfer");
  44 MODULE_DESCRIPTION("i82596 driver");
  45 MODULE_LICENSE("GPL");
  46 MODULE_ALIAS("platform:snirm_82596");
  47 module_param(i596_debug, int, 0);
  48 MODULE_PARM_DESC(i596_debug, "82596 debug mask");
  49
  50 static 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
  58 static 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
  78 static int __devinit 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
 141 probe_failed:
 142         free_netdev(netdevice);
 143 probe_failed_free_ca:
 144         iounmap(ca_addr);
 145 probe_failed_free_mpu:
 146         iounmap(mpu_addr);
 147         return retval;
 148 }
 149
 150 static int __devexit 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
 164 static struct platform_driver sni_82596_driver = {
 165         .probe  = sni_82596_probe,
 166         .remove = __devexit_p(sni_82596_driver_remove),
 167         .driver = {
 168                 .name   = sni_82596_string,
 169                 .owner  = THIS_MODULE,
 170         },
 171 };
 172
 173 static int __devinit 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
 180 static void __exit sni_82596_exit(void)
 181 {
 182         platform_driver_unregister(&sni_82596_driver);
 183 }
 184
 185 module_init(sni_82596_init);
 186 module_exit(sni_82596_exit);