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hydra.c
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/* New Hydra driver using generic 8390 core */
/* Based on old hydra driver by Topi Kanerva ([email protected]) */
/* This file is subject to the terms and conditions of the GNU General */
/* Public License. See the file COPYING in the main directory of the */
/* Linux distribution for more details. */
/* Peter De Schrijver ([email protected]) */
/* Oldenburg 2000 */
/* The Amiganet is a Zorro-II board made by Hydra Systems. It contains a */
/* NS8390 NIC (network interface controller) clone, 16 or 64K on-board RAM */
/* and 10BASE-2 (thin coax) and AUI connectors. */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/skbuff.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <linux/zorro.h>
#include "8390.h"
#define NE_EN0_DCFG (0x0e*2)
#define NESM_START_PG 0x0 /* First page of TX buffer */
#define NESM_STOP_PG 0x40 /* Last page +1 of RX ring */
#define HYDRA_NIC_BASE 0xffe1
#define HYDRA_ADDRPROM 0xffc0
#define HYDRA_VERSION "v3.0alpha"
#define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
static int __devinit hydra_init_one(struct zorro_dev *z,
const struct zorro_device_id *ent);
static int __devinit hydra_init(struct zorro_dev *z);
static int hydra_open(struct net_device *dev);
static int hydra_close(struct net_device *dev);
static void hydra_reset_8390(struct net_device *dev);
static void hydra_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page);
static void hydra_block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset);
static void hydra_block_output(struct net_device *dev, int count,
const unsigned char *buf, int start_page);
static void __devexit hydra_remove_one(struct zorro_dev *z);
static struct zorro_device_id hydra_zorro_tbl[] __devinitdata = {
{ ZORRO_PROD_HYDRA_SYSTEMS_AMIGANET },
{ 0 }
};
static struct zorro_driver hydra_driver = {
.name = "hydra",
.id_table = hydra_zorro_tbl,
.probe = hydra_init_one,
.remove = __devexit_p(hydra_remove_one),
};
static int __devinit hydra_init_one(struct zorro_dev *z,
const struct zorro_device_id *ent)
{
int err;
if (!request_mem_region(z->resource.start, 0x10000, "Hydra"))
return -EBUSY;
if ((err = hydra_init(z))) {
release_mem_region(z->resource.start, 0x10000);
return -EBUSY;
}
return 0;
}
static int __devinit hydra_init(struct zorro_dev *z)
{
struct net_device *dev;
unsigned long board = ZTWO_VADDR(z->resource.start);
unsigned long ioaddr = board+HYDRA_NIC_BASE;
const char name[] = "NE2000";
int start_page, stop_page;
int j;
int err;
static u32 hydra_offsets[16] = {
0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
};
dev = alloc_ei_netdev();
if (!dev)
return -ENOMEM;
SET_MODULE_OWNER(dev);
for(j = 0; j < ETHER_ADDR_LEN; j++)
dev->dev_addr[j] = *((u8 *)(board + HYDRA_ADDRPROM + 2*j));
/* We must set the 8390 for word mode. */
z_writeb(0x4b, ioaddr + NE_EN0_DCFG);
start_page = NESM_START_PG;
stop_page = NESM_STOP_PG;
dev->base_addr = ioaddr;
dev->irq = IRQ_AMIGA_PORTS;
/* Install the Interrupt handler */
if (request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, "Hydra Ethernet",
dev)) {
free_netdev(dev);
return -EAGAIN;
}
ei_status.name = name;
ei_status.tx_start_page = start_page;
ei_status.stop_page = stop_page;
ei_status.word16 = 1;
ei_status.bigendian = 1;
ei_status.rx_start_page = start_page + TX_PAGES;
ei_status.reset_8390 = &hydra_reset_8390;
ei_status.block_input = &hydra_block_input;
ei_status.block_output = &hydra_block_output;
ei_status.get_8390_hdr = &hydra_get_8390_hdr;
ei_status.reg_offset = hydra_offsets;
dev->open = &hydra_open;
dev->stop = &hydra_close;
#ifdef CONFIG_NET_POLL_CONTROLLER
dev->poll_controller = ei_poll;
#endif
NS8390_init(dev, 0);
err = register_netdev(dev);
if (err) {
free_irq(IRQ_AMIGA_PORTS, dev);
free_netdev(dev);
return err;
}
zorro_set_drvdata(z, dev);
printk(KERN_INFO "%s: Hydra at 0x%08lx, address "
"%02x:%02x:%02x:%02x:%02x:%02x (hydra.c " HYDRA_VERSION ")\n",
dev->name, z->resource.start, dev->dev_addr[0], dev->dev_addr[1],
dev->dev_addr[2], dev->dev_addr[3], dev->dev_addr[4],
dev->dev_addr[5]);
return 0;
}
static int hydra_open(struct net_device *dev)
{
ei_open(dev);
return 0;
}
static int hydra_close(struct net_device *dev)
{
if (ei_debug > 1)
printk(KERN_DEBUG "%s: Shutting down ethercard.\n", dev->name);
ei_close(dev);
return 0;
}
static void hydra_reset_8390(struct net_device *dev)
{
printk(KERN_INFO "Hydra hw reset not there\n");
}
static void hydra_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page)
{
int nic_base = dev->base_addr;
short *ptrs;
unsigned long hdr_start= (nic_base-HYDRA_NIC_BASE) +
((ring_page - NESM_START_PG)<<8);
ptrs = (short *)hdr;
*(ptrs++) = z_readw(hdr_start);
*((short *)hdr) = WORDSWAP(*((short *)hdr));
hdr_start += 2;
*(ptrs++) = z_readw(hdr_start);
*((short *)hdr+1) = WORDSWAP(*((short *)hdr+1));
}
static void hydra_block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset)
{
unsigned long nic_base = dev->base_addr;
unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
unsigned long xfer_start = mem_base + ring_offset - (NESM_START_PG<<8);
if (count&1)
count++;
if (xfer_start+count > mem_base + (NESM_STOP_PG<<8)) {
int semi_count = (mem_base + (NESM_STOP_PG<<8)) - xfer_start;
z_memcpy_fromio(skb->data,xfer_start,semi_count);
count -= semi_count;
z_memcpy_fromio(skb->data+semi_count, mem_base, count);
} else
z_memcpy_fromio(skb->data, xfer_start,count);
}
static void hydra_block_output(struct net_device *dev, int count,
const unsigned char *buf, int start_page)
{
unsigned long nic_base = dev->base_addr;
unsigned long mem_base = nic_base - HYDRA_NIC_BASE;
if (count&1)
count++;
z_memcpy_toio(mem_base+((start_page - NESM_START_PG)<<8), buf, count);
}
static void __devexit hydra_remove_one(struct zorro_dev *z)
{
struct net_device *dev = zorro_get_drvdata(z);
unregister_netdev(dev);
free_irq(IRQ_AMIGA_PORTS, dev);
release_mem_region(ZTWO_PADDR(dev->base_addr)-HYDRA_NIC_BASE, 0x10000);
free_netdev(dev);
}
static int __init hydra_init_module(void)
{
return zorro_module_init(&hydra_driver);
}
static void __exit hydra_cleanup_module(void)
{
zorro_unregister_driver(&hydra_driver);
}
module_init(hydra_init_module);
module_exit(hydra_cleanup_module);
MODULE_LICENSE("GPL");