// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sni_82596.c -- driver for intel 82596 ethernet controller, as
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* used in older SNI RM machines
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/interrupt.h>
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#include <linux/delay.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#define SNI_82596_DRIVER_VERSION "SNI RM 82596 driver - Revision: 0.01"
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static const char sni_82596_string[] = "snirm_82596";
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#define SYSBUS 0x00004400
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/* big endian CPU, 82596 little endian */
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#define SWAP32(x) cpu_to_le32((u32)(x))
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#define SWAP16(x) cpu_to_le16((u16)(x))
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#define OPT_MPU_16BIT 0x01
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#include "lib82596.c"
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MODULE_AUTHOR("Thomas Bogendoerfer");
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MODULE_DESCRIPTION("i82596 driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:snirm_82596");
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module_param(i596_debug, int, 0);
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MODULE_PARM_DESC(i596_debug, "82596 debug mask");
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static inline void ca(struct net_device *dev)
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{
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struct i596_private *lp = netdev_priv(dev);
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writel(0, lp->ca);
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}
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static void mpu_port(struct net_device *dev, int c, dma_addr_t x)
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{
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struct i596_private *lp = netdev_priv(dev);
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u32 v = (u32) (c) | (u32) (x);
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if (lp->options & OPT_MPU_16BIT) {
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writew(v & 0xffff, lp->mpu_port);
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wmb(); /* order writes to MPU port */
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udelay(1);
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writew(v >> 16, lp->mpu_port);
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} else {
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writel(v, lp->mpu_port);
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wmb(); /* order writes to MPU port */
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udelay(1);
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writel(v, lp->mpu_port);
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}
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}
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static int sni_82596_probe(struct platform_device *dev)
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{
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struct net_device *netdevice;
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struct i596_private *lp;
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struct resource *res, *ca, *idprom, *options;
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int retval = -ENOMEM;
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void __iomem *mpu_addr;
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void __iomem *ca_addr;
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u8 __iomem *eth_addr;
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res = platform_get_resource(dev, IORESOURCE_MEM, 0);
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ca = platform_get_resource(dev, IORESOURCE_MEM, 1);
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options = platform_get_resource(dev, 0, 0);
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idprom = platform_get_resource(dev, IORESOURCE_MEM, 2);
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if (!res || !ca || !options || !idprom)
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return -ENODEV;
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mpu_addr = ioremap(res->start, 4);
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if (!mpu_addr)
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return -ENOMEM;
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ca_addr = ioremap(ca->start, 4);
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if (!ca_addr)
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goto probe_failed_free_mpu;
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printk(KERN_INFO "Found i82596 at 0x%x\n", res->start);
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netdevice = alloc_etherdev(sizeof(struct i596_private));
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if (!netdevice)
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goto probe_failed_free_ca;
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SET_NETDEV_DEV(netdevice, &dev->dev);
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platform_set_drvdata (dev, netdevice);
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netdevice->base_addr = res->start;
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netdevice->irq = platform_get_irq(dev, 0);
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eth_addr = ioremap(idprom->start, 0x10);
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if (!eth_addr)
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goto probe_failed;
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/* someone seems to like messed up stuff */
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netdevice->dev_addr[0] = readb(eth_addr + 0x0b);
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netdevice->dev_addr[1] = readb(eth_addr + 0x0a);
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netdevice->dev_addr[2] = readb(eth_addr + 0x09);
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netdevice->dev_addr[3] = readb(eth_addr + 0x08);
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netdevice->dev_addr[4] = readb(eth_addr + 0x07);
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netdevice->dev_addr[5] = readb(eth_addr + 0x06);
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iounmap(eth_addr);
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if (netdevice->irq < 0) {
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printk(KERN_ERR "%s: IRQ not found for i82596 at 0x%lx\n",
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__FILE__, netdevice->base_addr);
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retval = netdevice->irq;
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goto probe_failed;
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}
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lp = netdev_priv(netdevice);
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lp->options = options->flags & IORESOURCE_BITS;
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lp->ca = ca_addr;
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lp->mpu_port = mpu_addr;
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lp->dma = dma_alloc_coherent(&dev->dev, sizeof(struct i596_dma),
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&lp->dma_addr, GFP_KERNEL);
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if (!lp->dma)
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goto probe_failed;
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retval = i82596_probe(netdevice);
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if (retval)
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goto probe_failed_free_dma;
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return 0;
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probe_failed_free_dma:
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dma_free_coherent(&dev->dev, sizeof(struct i596_dma), lp->dma,
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lp->dma_addr);
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probe_failed:
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free_netdev(netdevice);
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probe_failed_free_ca:
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iounmap(ca_addr);
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probe_failed_free_mpu:
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iounmap(mpu_addr);
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return retval;
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}
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static int sni_82596_driver_remove(struct platform_device *pdev)
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{
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struct net_device *dev = platform_get_drvdata(pdev);
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struct i596_private *lp = netdev_priv(dev);
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unregister_netdev(dev);
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dma_free_coherent(&pdev->dev, sizeof(struct i596_private), lp->dma,
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lp->dma_addr);
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iounmap(lp->ca);
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iounmap(lp->mpu_port);
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free_netdev (dev);
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return 0;
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}
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static struct platform_driver sni_82596_driver = {
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.probe = sni_82596_probe,
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.remove = sni_82596_driver_remove,
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.driver = {
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.name = sni_82596_string,
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},
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};
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static int sni_82596_init(void)
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{
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printk(KERN_INFO SNI_82596_DRIVER_VERSION "\n");
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return platform_driver_register(&sni_82596_driver);
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}
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static void __exit sni_82596_exit(void)
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{
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platform_driver_unregister(&sni_82596_driver);
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}
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module_init(sni_82596_init);
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module_exit(sni_82596_exit);
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