185 lines
4.5 KiB
C
185 lines
4.5 KiB
C
/*
|
|
* sni_82596.c -- driver for intel 82596 ethernet controller, as
|
|
* used in older SNI RM machines
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/string.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/netdevice.h>
|
|
#include <linux/etherdevice.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/types.h>
|
|
#include <linux/bitops.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
|
|
#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
|
|
|
|
static const char sni_82596_string[] = "snirm_82596";
|
|
|
|
#define LIB82596_DMA_ATTR 0
|
|
|
|
#define DMA_WBACK(priv, addr, len) do { } while (0)
|
|
#define DMA_INV(priv, addr, len) do { } while (0)
|
|
#define DMA_WBACK_INV(priv, addr, len) do { } while (0)
|
|
|
|
#define SYSBUS 0x00004400
|
|
|
|
/* big endian CPU, 82596 little endian */
|
|
#define SWAP32(x) cpu_to_le32((u32)(x))
|
|
#define SWAP16(x) cpu_to_le16((u16)(x))
|
|
|
|
#define OPT_MPU_16BIT 0x01
|
|
|
|
#include "lib82596.c"
|
|
|
|
MODULE_AUTHOR("Thomas Bogendoerfer");
|
|
MODULE_DESCRIPTION("i82596 driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:snirm_82596");
|
|
module_param(i596_debug, int, 0);
|
|
MODULE_PARM_DESC(i596_debug, "82596 debug mask");
|
|
|
|
static inline void ca(struct net_device *dev)
|
|
{
|
|
struct i596_private *lp = netdev_priv(dev);
|
|
|
|
writel(0, lp->ca);
|
|
}
|
|
|
|
|
|
static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
|
|
{
|
|
struct i596_private *lp = netdev_priv(dev);
|
|
|
|
u32 v = (u32) (c) | (u32) (x);
|
|
|
|
if (lp->options & OPT_MPU_16BIT) {
|
|
writew(v & 0xffff, lp->mpu_port);
|
|
wmb(); /* order writes to MPU port */
|
|
udelay(1);
|
|
writew(v >> 16, lp->mpu_port);
|
|
} else {
|
|
writel(v, lp->mpu_port);
|
|
wmb(); /* order writes to MPU port */
|
|
udelay(1);
|
|
writel(v, lp->mpu_port);
|
|
}
|
|
}
|
|
|
|
|
|
static int sni_82596_probe(struct platform_device *dev)
|
|
{
|
|
struct net_device *netdevice;
|
|
struct i596_private *lp;
|
|
struct resource *res, *ca, *idprom, *options;
|
|
int retval = -ENOMEM;
|
|
void __iomem *mpu_addr;
|
|
void __iomem *ca_addr;
|
|
u8 __iomem *eth_addr;
|
|
|
|
res = platform_get_resource(dev, IORESOURCE_MEM, 0);
|
|
ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
|
|
options = platform_get_resource(dev, 0, 0);
|
|
idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
|
|
if (!res || !ca || !options || !idprom)
|
|
return -ENODEV;
|
|
mpu_addr = ioremap_nocache(res->start, 4);
|
|
if (!mpu_addr)
|
|
return -ENOMEM;
|
|
ca_addr = ioremap_nocache(ca->start, 4);
|
|
if (!ca_addr)
|
|
goto probe_failed_free_mpu;
|
|
|
|
printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
|
|
|
|
netdevice = alloc_etherdev(sizeof(struct i596_private));
|
|
if (!netdevice)
|
|
goto probe_failed_free_ca;
|
|
|
|
SET_NETDEV_DEV(netdevice, &dev->dev);
|
|
platform_set_drvdata (dev, netdevice);
|
|
|
|
netdevice->base_addr = res->start;
|
|
netdevice->irq = platform_get_irq(dev, 0);
|
|
|
|
eth_addr = ioremap_nocache(idprom->start, 0x10);
|
|
if (!eth_addr)
|
|
goto probe_failed;
|
|
|
|
/* someone seems to like messed up stuff */
|
|
netdevice->dev_addr[0] = readb(eth_addr + 0x0b);
|
|
netdevice->dev_addr[1] = readb(eth_addr + 0x0a);
|
|
netdevice->dev_addr[2] = readb(eth_addr + 0x09);
|
|
netdevice->dev_addr[3] = readb(eth_addr + 0x08);
|
|
netdevice->dev_addr[4] = readb(eth_addr + 0x07);
|
|
netdevice->dev_addr[5] = readb(eth_addr + 0x06);
|
|
iounmap(eth_addr);
|
|
|
|
if (!netdevice->irq) {
|
|
printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
|
|
__FILE__, netdevice->base_addr);
|
|
goto probe_failed;
|
|
}
|
|
|
|
lp = netdev_priv(netdevice);
|
|
lp->options = options->flags & IORESOURCE_BITS;
|
|
lp->ca = ca_addr;
|
|
lp->mpu_port = mpu_addr;
|
|
|
|
retval = i82596_probe(netdevice);
|
|
if (retval == 0)
|
|
return 0;
|
|
|
|
probe_failed:
|
|
free_netdev(netdevice);
|
|
probe_failed_free_ca:
|
|
iounmap(ca_addr);
|
|
probe_failed_free_mpu:
|
|
iounmap(mpu_addr);
|
|
return retval;
|
|
}
|
|
|
|
static int sni_82596_driver_remove(struct platform_device *pdev)
|
|
{
|
|
struct net_device *dev = platform_get_drvdata(pdev);
|
|
struct i596_private *lp = netdev_priv(dev);
|
|
|
|
unregister_netdev(dev);
|
|
dma_free_attrs(dev->dev.parent, sizeof(struct i596_private), lp->dma,
|
|
lp->dma_addr, LIB82596_DMA_ATTR);
|
|
iounmap(lp->ca);
|
|
iounmap(lp->mpu_port);
|
|
free_netdev (dev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver sni_82596_driver = {
|
|
.probe = sni_82596_probe,
|
|
.remove = sni_82596_driver_remove,
|
|
.driver = {
|
|
.name = sni_82596_string,
|
|
},
|
|
};
|
|
|
|
static int sni_82596_init(void)
|
|
{
|
|
printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
|
|
return platform_driver_register(&sni_82596_driver);
|
|
}
|
|
|
|
|
|
static void __exit sni_82596_exit(void)
|
|
{
|
|
platform_driver_unregister(&sni_82596_driver);
|
|
}
|
|
|
|
module_init(sni_82596_init);
|
|
module_exit(sni_82596_exit);
|