2 * sni_82596.c -- driver for intel 82596 ethernet controller, as
3 * used in older SNI RM machines
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>
22 #include <linux/irq.h>
24 #define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
26 static const char sni_82596_string[] = "snirm_82596";
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)
34 #define SYSBUS 0x00004400
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))
40 #define OPT_MPU_16BIT 0x01
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");
51 static inline void ca(struct net_device *dev)
53 struct i596_private *lp = netdev_priv(dev);
59 static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
61 struct i596_private *lp = netdev_priv(dev);
63 u32 v = (u32) (c) | (u32) (x);
65 if (lp->options & OPT_MPU_16BIT) {
66 writew(v & 0xffff, lp->mpu_port);
67 wmb(); /* order writes to MPU port */
69 writew(v >> 16, lp->mpu_port);
71 writel(v, lp->mpu_port);
72 wmb(); /* order writes to MPU port */
74 writel(v, lp->mpu_port);
79 static int __devinit sni_82596_probe(struct platform_device *dev)
81 struct net_device *netdevice;
82 struct i596_private *lp;
83 struct resource *res, *ca, *idprom, *options;
85 void __iomem *mpu_addr;
86 void __iomem *ca_addr;
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)
95 mpu_addr = ioremap_nocache(res->start, 4);
98 ca_addr = ioremap_nocache(ca->start, 4);
100 goto probe_failed_free_mpu;
102 printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
104 netdevice = alloc_etherdev(sizeof(struct i596_private));
106 goto probe_failed_free_ca;
108 SET_NETDEV_DEV(netdevice, &dev->dev);
109 platform_set_drvdata (dev, netdevice);
111 netdevice->base_addr = res->start;
112 netdevice->irq = platform_get_irq(dev, 0);
114 eth_addr = ioremap_nocache(idprom->start, 0x10);
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);
127 if (!netdevice->irq) {
128 printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
129 __FILE__, netdevice->base_addr);
133 lp = netdev_priv(netdevice);
134 lp->options = options->flags & IORESOURCE_BITS;
136 lp->mpu_port = mpu_addr;
138 retval = i82596_probe(netdevice);
143 free_netdev(netdevice);
144 probe_failed_free_ca:
146 probe_failed_free_mpu:
151 static int __devexit sni_82596_driver_remove(struct platform_device *pdev)
153 struct net_device *dev = platform_get_drvdata(pdev);
154 struct i596_private *lp = netdev_priv(dev);
156 unregister_netdev(dev);
157 DMA_FREE(dev->dev.parent, sizeof(struct i596_private),
158 lp->dma, lp->dma_addr);
160 iounmap(lp->mpu_port);
165 static struct platform_driver sni_82596_driver = {
166 .probe = sni_82596_probe,
167 .remove = __devexit_p(sni_82596_driver_remove),
169 .name = sni_82596_string,
170 .owner = THIS_MODULE,
174 static int __devinit sni_82596_init(void)
176 printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
177 return platform_driver_register(&sni_82596_driver);
181 static void __exit sni_82596_exit(void)
183 platform_driver_unregister(&sni_82596_driver);
186 module_init(sni_82596_init);
187 module_exit(sni_82596_exit);