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/*
* Amiga Linux/m68k and Linux/PPC Ariadne II and X-Surf Ethernet Driver
*
* (C) Copyright 1998-2000 by some Elitist 680x0 Users(TM)
*
* ---------------------------------------------------------------------------
*
* This program is based on all the other NE2000 drivers for Linux
*
* ---------------------------------------------------------------------------
*
* 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.
*
* ---------------------------------------------------------------------------
*
* The Ariadne II and X-Surf are Zorro-II boards containing Realtek RTL8019AS
* Ethernet Controllers.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/zorro.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include "8390.h"
#define NE_BASE (dev->base_addr)
#define NE_CMD (0x00*2)
#define NE_DATAPORT (0x10*2) /* NatSemi-defined port window offset. */
#define NE_RESET (0x1f*2) /* Issue a read to reset, a write to clear. */
#define NE_IO_EXTENT (0x20*2)
#define NE_EN0_ISR (0x07*2)
#define NE_EN0_DCFG (0x0e*2)
#define NE_EN0_RSARLO (0x08*2)
#define NE_EN0_RSARHI (0x09*2)
#define NE_EN0_RCNTLO (0x0a*2)
#define NE_EN0_RXCR (0x0c*2)
#define NE_EN0_TXCR (0x0d*2)
#define NE_EN0_RCNTHI (0x0b*2)
#define NE_EN0_IMR (0x0f*2)
#define NESM_START_PG 0x40 /* First page of TX buffer */
#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
#define WORDSWAP(a) ((((a)>>8)&0xff) | ((a)<<8))
#ifdef MODULE
static struct net_device *root_ariadne2_dev;
#endif
static const struct card_info {
zorro_id id;
const char *name;
unsigned int offset;
} cards[] __initdata = {
{ ZORRO_PROD_VILLAGE_TRONIC_ARIADNE2, "Ariadne II", 0x0600 },
{ ZORRO_PROD_INDIVIDUAL_COMPUTERS_X_SURF, "X-Surf", 0x8600 },
};
static int __init ariadne2_probe(void);
static int __init ariadne2_init(struct net_device *dev, unsigned long board,
const char *name, unsigned long ioaddr);
static int ariadne2_open(struct net_device *dev);
static int ariadne2_close(struct net_device *dev);
static void ariadne2_reset_8390(struct net_device *dev);
static void ariadne2_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page);
static void ariadne2_block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset);
static void ariadne2_block_output(struct net_device *dev, const int count,
const unsigned char *buf,
const int start_page);
static void __exit ariadne2_cleanup(void);
static int __init ariadne2_probe(void)
{
struct net_device *dev;
struct zorro_dev *z = NULL;
unsigned long board, ioaddr;
int err = -ENODEV;
int i;
while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
for (i = ARRAY_SIZE(cards)-1; i >= 0; i--)
if (z->id == cards[i].id)
break;
if (i < 0)
continue;
board = z->resource.start;
ioaddr = board+cards[i].offset;
dev = init_etherdev(0, 0);
SET_MODULE_OWNER(dev);
if (!dev)
return -ENOMEM;
if (!request_mem_region(ioaddr, NE_IO_EXTENT*2, dev->name)) {
kfree(dev);
continue;
}
if ((err = ariadne2_init(dev, board, cards[i].name,
ZTWO_VADDR(ioaddr)))) {
release_mem_region(ioaddr, NE_IO_EXTENT*2);
kfree(dev);
return err;
}
err = 0;
}
if (err == -ENODEV)
printk("No Ariadne II or X-Surf ethernet card found.\n");
return err;
}
static int __init ariadne2_init(struct net_device *dev, unsigned long board,
const char *name, unsigned long ioaddr)
{
int i;
unsigned char SA_prom[32];
int start_page, stop_page;
static u32 ariadne2_offsets[16] = {
0x00, 0x02, 0x04, 0x06, 0x08, 0x0a, 0x0c, 0x0e,
0x10, 0x12, 0x14, 0x16, 0x18, 0x1a, 0x1c, 0x1e,
};
/* Reset card. Who knows what dain-bramaged state it was left in. */
{
unsigned long reset_start_time = jiffies;
writeb(readb(ioaddr + NE_RESET), ioaddr + NE_RESET);
while ((readb(ioaddr + NE_EN0_ISR) & ENISR_RESET) == 0)
if (jiffies - reset_start_time > 2*HZ/100) {
printk(" not found (no reset ack).\n");
return -ENODEV;
}
writeb(0xff, ioaddr + NE_EN0_ISR); /* Ack all intr. */
}
/* Read the 16 bytes of station address PROM.
We must first initialize registers, similar to NS8390_init(eifdev, 0).
We can't reliably read the SAPROM address without this.
(I learned the hard way!). */
{
struct {
u32 value;
u32 offset;
} program_seq[] = {
{E8390_NODMA+E8390_PAGE0+E8390_STOP, NE_CMD}, /* Select page 0*/
{0x48, NE_EN0_DCFG}, /* Set byte-wide (0x48) access. */
{0x00, NE_EN0_RCNTLO}, /* Clear the count regs. */
{0x00, NE_EN0_RCNTHI},
{0x00, NE_EN0_IMR}, /* Mask completion irq. */
{0xFF, NE_EN0_ISR},
{E8390_RXOFF, NE_EN0_RXCR}, /* 0x20 Set to monitor */
{E8390_TXOFF, NE_EN0_TXCR}, /* 0x02 and loopback mode. */
{32, NE_EN0_RCNTLO},
{0x00, NE_EN0_RCNTHI},
{0x00, NE_EN0_RSARLO}, /* DMA starting at 0x0000. */
{0x00, NE_EN0_RSARHI},
{E8390_RREAD+E8390_START, NE_CMD},
};
for (i = 0; i < sizeof(program_seq)/sizeof(program_seq[0]); i++) {
writeb(program_seq[i].value, ioaddr + program_seq[i].offset);
}
}
for (i = 0; i < 16; i++) {
SA_prom[i] = readb(ioaddr + NE_DATAPORT);
(void)readb(ioaddr + NE_DATAPORT);
}
/* We must set the 8390 for word mode. */
writeb(0x49, 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 */
i = request_irq(IRQ_AMIGA_PORTS, ei_interrupt, SA_SHIRQ, dev->name, dev);
if (i) return i;
/* Allocate dev->priv and fill in 8390 specific dev fields. */
if (ethdev_init(dev)) {
printk("Unable to get memory for dev->priv.\n");
return -ENOMEM;
}
for(i = 0; i < ETHER_ADDR_LEN; i++) {
#ifdef DEBUG
printk(" %2.2x", SA_prom[i]);
#endif
dev->dev_addr[i] = SA_prom[i];
}
printk("%s: %s at 0x%08lx, Ethernet Address "
"%02x:%02x:%02x:%02x:%02x:%02x\n", dev->name, name, board,
dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5]);
ei_status.name = name;
ei_status.tx_start_page = start_page;
ei_status.stop_page = stop_page;
ei_status.word16 = 1;
ei_status.rx_start_page = start_page + TX_PAGES;
ei_status.reset_8390 = &ariadne2_reset_8390;
ei_status.block_input = &ariadne2_block_input;
ei_status.block_output = &ariadne2_block_output;
ei_status.get_8390_hdr = &ariadne2_get_8390_hdr;
ei_status.reg_offset = ariadne2_offsets;
dev->open = &ariadne2_open;
dev->stop = &ariadne2_close;
#ifdef MODULE
ei_status.priv = (unsigned long)root_ariadne2_dev;
root_ariadne2_dev = dev;
#endif
NS8390_init(dev, 0);
return 0;
}
static int ariadne2_open(struct net_device *dev)
{
ei_open(dev);
return 0;
}
static int ariadne2_close(struct net_device *dev)
{
if (ei_debug > 1)
printk("%s: Shutting down ethercard.\n", dev->name);
ei_close(dev);
return 0;
}
/* Hard reset the card. This used to pause for the same period that a
8390 reset command required, but that shouldn't be necessary. */
static void ariadne2_reset_8390(struct net_device *dev)
{
unsigned long reset_start_time = jiffies;
if (ei_debug > 1)
printk("resetting the 8390 t=%ld...", jiffies);
writeb(readb(NE_BASE + NE_RESET), NE_BASE + NE_RESET);
ei_status.txing = 0;
ei_status.dmaing = 0;
/* This check _should_not_ be necessary, omit eventually. */
while ((readb(NE_BASE+NE_EN0_ISR) & ENISR_RESET) == 0)
if (jiffies - reset_start_time > 2*HZ/100) {
printk("%s: ne_reset_8390() did not complete.\n", dev->name);
break;
}
writeb(ENISR_RESET, NE_BASE + NE_EN0_ISR); /* Ack intr. */
}
/* Grab the 8390 specific header. Similar to the block_input routine, but
we don't need to be concerned with ring wrap as the header will be at
the start of a page, so we optimize accordingly. */
static void ariadne2_get_8390_hdr(struct net_device *dev,
struct e8390_pkt_hdr *hdr, int ring_page)
{
int nic_base = dev->base_addr;
int cnt;
short *ptrs;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_get_8390_hdr "
"[DMAstat:%d][irqlock:%d].\n", dev->name, ei_status.dmaing,
ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
writeb(sizeof(struct e8390_pkt_hdr), nic_base + NE_EN0_RCNTLO);
writeb(0, nic_base + NE_EN0_RCNTHI);
writeb(0, nic_base + NE_EN0_RSARLO); /* On page boundary */
writeb(ring_page, nic_base + NE_EN0_RSARHI);
writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
ptrs = (short*)hdr;
for (cnt = 0; cnt < (sizeof(struct e8390_pkt_hdr)>>1); cnt++)
*ptrs++ = readw(NE_BASE + NE_DATAPORT);
writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
hdr->count = WORDSWAP(hdr->count);
ei_status.dmaing &= ~0x01;
}
/* Block input and output, similar to the Crynwr packet driver. If you
are porting to a new ethercard, look at the packet driver source for hints.
The NEx000 doesn't share the on-board packet memory -- you have to put
the packet out through the "remote DMA" dataport using writeb. */
static void ariadne2_block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset)
{
int nic_base = dev->base_addr;
char *buf = skb->data;
short *ptrs;
int cnt;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_block_input "
"[DMAstat:%d][irqlock:%d].\n",
dev->name, ei_status.dmaing, ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
writeb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
writeb(ring_offset & 0xff, nic_base + NE_EN0_RSARLO);
writeb(ring_offset >> 8, nic_base + NE_EN0_RSARHI);
writeb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
ptrs = (short*)buf;
for (cnt = 0; cnt < (count>>1); cnt++)
*ptrs++ = readw(NE_BASE + NE_DATAPORT);
if (count & 0x01)
buf[count-1] = readb(NE_BASE + NE_DATAPORT);
writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
}
static void ariadne2_block_output(struct net_device *dev, int count,
const unsigned char *buf,
const int start_page)
{
int nic_base = NE_BASE;
unsigned long dma_start;
short *ptrs;
int cnt;
/* Round the count up for word writes. Do we need to do this?
What effect will an odd byte count have on the 8390?
I should check someday. */
if (count & 0x01)
count++;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
printk("%s: DMAing conflict in ne_block_output."
"[DMAstat:%d][irqlock:%d]\n", dev->name, ei_status.dmaing,
ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
/* We should already be in page 0, but to be safe... */
writeb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
writeb(ENISR_RDC, nic_base + NE_EN0_ISR);
/* Now the normal output. */
writeb(count & 0xff, nic_base + NE_EN0_RCNTLO);
writeb(count >> 8, nic_base + NE_EN0_RCNTHI);
writeb(0x00, nic_base + NE_EN0_RSARLO);
writeb(start_page, nic_base + NE_EN0_RSARHI);
writeb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
ptrs = (short*)buf;
for (cnt = 0; cnt < count>>1; cnt++)
writew(*ptrs++, NE_BASE+NE_DATAPORT);
dma_start = jiffies;
while ((readb(NE_BASE + NE_EN0_ISR) & ENISR_RDC) == 0)
if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
printk("%s: timeout waiting for Tx RDC.\n", dev->name);
ariadne2_reset_8390(dev);
NS8390_init(dev,1);
break;
}
writeb(ENISR_RDC, nic_base + NE_EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
return;
}
static void __exit ariadne2_cleanup(void)
{
#ifdef MODULE
struct net_device *dev, *next;
while ((dev = root_ariadne2_dev)) {
next = (struct net_device *)(ei_status.priv);
unregister_netdev(dev);
free_irq(IRQ_AMIGA_PORTS, dev);
release_mem_region(ZTWO_PADDR(dev->base_addr), NE_IO_EXTENT*2);
kfree(dev);
root_ariadne2_dev = next;
}
#endif
}
module_init(ariadne2_probe);
module_exit(ariadne2_cleanup);
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