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// SPDX-License-Identifier: GPL-2.0-only
/*
* 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 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(res->start, 4);
if (!mpu_addr)
return -ENOMEM;
ca_addr = ioremap(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(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 < 0) {
printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
__FILE__, netdevice->base_addr);
retval = netdevice->irq;
goto probe_failed;
}
lp = netdev_priv(netdevice);
lp->options = options->flags & IORESOURCE_BITS;
lp->ca = ca_addr;
lp->mpu_port = mpu_addr;
lp->dma = dma_alloc_coherent(&dev->dev, sizeof(struct i596_dma),
&lp->dma_addr, GFP_KERNEL);
if (!lp->dma)
goto probe_failed;
retval = i82596_probe(netdevice);
if (retval)
goto probe_failed_free_dma;
return 0;
probe_failed_free_dma:
dma_free_coherent(&dev->dev, sizeof(struct i596_dma), lp->dma,
lp->dma_addr);
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_coherent(&pdev->dev, sizeof(struct i596_private), lp->dma,
lp->dma_addr);
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);
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