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
 25static 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
 43MODULE_AUTHOR("Thomas Bogendoerfer");
 44MODULE_DESCRIPTION("i82596 driver");
 45MODULE_LICENSE("GPL");
 46MODULE_ALIAS("platform:snirm_82596");
 47module_param(i596_debug, int, 0);
 48MODULE_PARM_DESC(i596_debug, "82596 debug mask");
 49
 50static 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
 58static 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
 78static 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
141probe_failed:
142	free_netdev(netdevice);
143probe_failed_free_ca:
144	iounmap(ca_addr);
145probe_failed_free_mpu:
146	iounmap(mpu_addr);
147	return retval;
148}
149
150static 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
164static 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
173static 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
180static void __exit sni_82596_exit(void)
181{
182	platform_driver_unregister(&sni_82596_driver);
183}
184
185module_init(sni_82596_init);
186module_exit(sni_82596_exit);