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
24static 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
42MODULE_AUTHOR("Thomas Bogendoerfer");
43MODULE_DESCRIPTION("i82596 driver");
44MODULE_LICENSE("GPL");
45MODULE_ALIAS("platform:snirm_82596");
46module_param(i596_debug, int, 0);
47MODULE_PARM_DESC(i596_debug, "82596 debug mask");
48
49static 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
57static 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
77static 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
140probe_failed:
141	free_netdev(netdevice);
142probe_failed_free_ca:
143	iounmap(ca_addr);
144probe_failed_free_mpu:
145	iounmap(mpu_addr);
146	return retval;
147}
148
149static 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
163static 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
171static 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
178static void __exit sni_82596_exit(void)
179{
180	platform_driver_unregister(&sni_82596_driver);
181}
182
183module_init(sni_82596_init);
184module_exit(sni_82596_exit);
185