tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
26static 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
44MODULE_AUTHOR("Thomas Bogendoerfer");
45MODULE_DESCRIPTION("i82596 driver");
46MODULE_LICENSE("GPL");
47MODULE_ALIAS("platform:snirm_82596");
48module_param(i596_debug, int, 0);
49MODULE_PARM_DESC(i596_debug, "82596 debug mask");
50
51static 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
59static 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
79static 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
142probe_failed:
143 free_netdev(netdevice);
144probe_failed_free_ca:
145 iounmap(ca_addr);
146probe_failed_free_mpu:
147 iounmap(mpu_addr);
148 return retval;
149}
150
151static 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
165static 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
174static 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
181static void __exit sni_82596_exit(void)
182{
183 platform_driver_unregister(&sni_82596_driver);
184}
185
186module_init(sni_82596_init);
187module_exit(sni_82596_exit);