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Linux/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                 .owner  = THIS_MODULE,
169         },
170 };
171 
172 static int sni_82596_init(void)
173 {
174         printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
175         return platform_driver_register(&sni_82596_driver);
176 }
177 
178 
179 static void __exit sni_82596_exit(void)
180 {
181         platform_driver_unregister(&sni_82596_driver);
182 }
183 
184 module_init(sni_82596_init);
185 module_exit(sni_82596_exit);
186 

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