linux/drivers/net/ethernet/amd/am79c961a.c

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/*
* linux/drivers/net/am79c961.c
*
* by Russell King <rmk@arm.linux.org.uk> 1995-2001.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Derived from various things including skeleton.c
*
* This is a special driver for the am79c961A Lance chip used in the
* Intel (formally Digital Equipment Corp) EBSA110 platform. Please
* note that this can not be built as a module (it doesn't make sense).
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/crc32.h>
#include <linux/bitops.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include <asm/system.h>
#define TX_BUFFERS 15
#define RX_BUFFERS 25
#include "am79c961a.h"
static irqreturn_t
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
am79c961_interrupt (int irq, void *dev_id);
static unsigned int net_debug = NET_DEBUG;
static const char version[] =
"am79c961 ethernet driver (C) 1995-2001 Russell King v0.04\n";
/* --------------------------------------------------------------------------- */
#ifdef __arm__
static void write_rreg(u_long base, u_int reg, u_int val)
{
asm volatile(
"str%?h %1, [%2] @ NET_RAP\n\t"
"str%?h %0, [%2, #-4] @ NET_RDP"
:
: "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
}
static inline unsigned short read_rreg(u_long base_addr, u_int reg)
{
unsigned short v;
asm volatile(
"str%?h %1, [%2] @ NET_RAP\n\t"
"ldr%?h %0, [%2, #-4] @ NET_RDP"
: "=r" (v)
: "r" (reg), "r" (ISAIO_BASE + 0x0464));
return v;
}
static inline void write_ireg(u_long base, u_int reg, u_int val)
{
asm volatile(
"str%?h %1, [%2] @ NET_RAP\n\t"
"str%?h %0, [%2, #8] @ NET_IDP"
:
: "r" (val), "r" (reg), "r" (ISAIO_BASE + 0x0464));
}
static inline unsigned short read_ireg(u_long base_addr, u_int reg)
{
u_short v;
asm volatile(
"str%?h %1, [%2] @ NAT_RAP\n\t"
"ldr%?h %0, [%2, #8] @ NET_IDP\n\t"
: "=r" (v)
: "r" (reg), "r" (ISAIO_BASE + 0x0464));
return v;
}
#define am_writeword(dev,off,val) __raw_writew(val, ISAMEM_BASE + ((off) << 1))
#define am_readword(dev,off) __raw_readw(ISAMEM_BASE + ((off) << 1))
static void
am_writebuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
{
offset = ISAMEM_BASE + (offset << 1);
length = (length + 1) & ~1;
if ((int)buf & 2) {
asm volatile("str%?h %2, [%0], #4"
: "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
buf += 2;
length -= 2;
}
while (length > 8) {
register unsigned int tmp asm("r2"), tmp2 asm("r3");
asm volatile(
"ldm%?ia %0!, {%1, %2}"
: "+r" (buf), "=&r" (tmp), "=&r" (tmp2));
length -= 8;
asm volatile(
"str%?h %1, [%0], #4\n\t"
"mov%? %1, %1, lsr #16\n\t"
"str%?h %1, [%0], #4\n\t"
"str%?h %2, [%0], #4\n\t"
"mov%? %2, %2, lsr #16\n\t"
"str%?h %2, [%0], #4"
: "+r" (offset), "=&r" (tmp), "=&r" (tmp2));
}
while (length > 0) {
asm volatile("str%?h %2, [%0], #4"
: "=&r" (offset) : "0" (offset), "r" (buf[0] | (buf[1] << 8)));
buf += 2;
length -= 2;
}
}
static void
am_readbuffer(struct net_device *dev, u_int offset, unsigned char *buf, unsigned int length)
{
offset = ISAMEM_BASE + (offset << 1);
length = (length + 1) & ~1;
if ((int)buf & 2) {
unsigned int tmp;
asm volatile(
"ldr%?h %2, [%0], #4\n\t"
"str%?b %2, [%1], #1\n\t"
"mov%? %2, %2, lsr #8\n\t"
"str%?b %2, [%1], #1"
: "=&r" (offset), "=&r" (buf), "=r" (tmp): "0" (offset), "1" (buf));
length -= 2;
}
while (length > 8) {
register unsigned int tmp asm("r2"), tmp2 asm("r3"), tmp3;
asm volatile(
"ldr%?h %2, [%0], #4\n\t"
"ldr%?h %4, [%0], #4\n\t"
"ldr%?h %3, [%0], #4\n\t"
"orr%? %2, %2, %4, lsl #16\n\t"
"ldr%?h %4, [%0], #4\n\t"
"orr%? %3, %3, %4, lsl #16\n\t"
"stm%?ia %1!, {%2, %3}"
: "=&r" (offset), "=&r" (buf), "=r" (tmp), "=r" (tmp2), "=r" (tmp3)
: "0" (offset), "1" (buf));
length -= 8;
}
while (length > 0) {
unsigned int tmp;
asm volatile(
"ldr%?h %2, [%0], #4\n\t"
"str%?b %2, [%1], #1\n\t"
"mov%? %2, %2, lsr #8\n\t"
"str%?b %2, [%1], #1"
: "=&r" (offset), "=&r" (buf), "=r" (tmp) : "0" (offset), "1" (buf));
length -= 2;
}
}
#else
#error Not compatible
#endif
static int
am79c961_ramtest(struct net_device *dev, unsigned int val)
{
unsigned char *buffer = kmalloc (65536, GFP_KERNEL);
int i, error = 0, errorcount = 0;
if (!buffer)
return 0;
memset (buffer, val, 65536);
am_writebuffer(dev, 0, buffer, 65536);
memset (buffer, val ^ 255, 65536);
am_readbuffer(dev, 0, buffer, 65536);
for (i = 0; i < 65536; i++) {
if (buffer[i] != val && !error) {
printk ("%s: buffer error (%02X %02X) %05X - ", dev->name, val, buffer[i], i);
error = 1;
errorcount ++;
} else if (error && buffer[i] == val) {
printk ("%05X\n", i);
error = 0;
}
}
if (error)
printk ("10000\n");
kfree (buffer);
return errorcount;
}
static void am79c961_mc_hash(char *addr, u16 *hash)
{
int idx, bit;
u32 crc;
crc = ether_crc_le(ETH_ALEN, addr);
idx = crc >> 30;
bit = (crc >> 26) & 15;
hash[idx] |= 1 << bit;
}
static unsigned int am79c961_get_rx_mode(struct net_device *dev, u16 *hash)
{
unsigned int mode = MODE_PORT_10BT;
if (dev->flags & IFF_PROMISC) {
mode |= MODE_PROMISC;
memset(hash, 0xff, 4 * sizeof(*hash));
} else if (dev->flags & IFF_ALLMULTI) {
memset(hash, 0xff, 4 * sizeof(*hash));
} else {
struct netdev_hw_addr *ha;
memset(hash, 0, 4 * sizeof(*hash));
netdev_for_each_mc_addr(ha, dev)
am79c961_mc_hash(ha->addr, hash);
}
return mode;
}
static void
am79c961_init_for_open(struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
unsigned long flags;
unsigned char *p;
u_int hdr_addr, first_free_addr;
u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
int i;
/*
* Stop the chip.
*/
spin_lock_irqsave(&priv->chip_lock, flags);
write_rreg (dev->base_addr, CSR0, CSR0_BABL|CSR0_CERR|CSR0_MISS|CSR0_MERR|CSR0_TINT|CSR0_RINT|CSR0_STOP);
spin_unlock_irqrestore(&priv->chip_lock, flags);
write_ireg (dev->base_addr, 5, 0x00a0); /* Receive address LED */
write_ireg (dev->base_addr, 6, 0x0081); /* Collision LED */
write_ireg (dev->base_addr, 7, 0x0090); /* XMIT LED */
write_ireg (dev->base_addr, 2, 0x0000); /* MODE register selects media */
for (i = LADRL; i <= LADRH; i++)
write_rreg (dev->base_addr, i, multi_hash[i - LADRL]);
for (i = PADRL, p = dev->dev_addr; i <= PADRH; i++, p += 2)
write_rreg (dev->base_addr, i, p[0] | (p[1] << 8));
write_rreg (dev->base_addr, MODE, mode);
write_rreg (dev->base_addr, POLLINT, 0);
write_rreg (dev->base_addr, SIZERXR, -RX_BUFFERS);
write_rreg (dev->base_addr, SIZETXR, -TX_BUFFERS);
first_free_addr = RX_BUFFERS * 8 + TX_BUFFERS * 8 + 16;
hdr_addr = 0;
priv->rxhead = 0;
priv->rxtail = 0;
priv->rxhdr = hdr_addr;
for (i = 0; i < RX_BUFFERS; i++) {
priv->rxbuffer[i] = first_free_addr;
am_writeword (dev, hdr_addr, first_free_addr);
am_writeword (dev, hdr_addr + 2, RMD_OWN);
am_writeword (dev, hdr_addr + 4, (-1600));
am_writeword (dev, hdr_addr + 6, 0);
first_free_addr += 1600;
hdr_addr += 8;
}
priv->txhead = 0;
priv->txtail = 0;
priv->txhdr = hdr_addr;
for (i = 0; i < TX_BUFFERS; i++) {
priv->txbuffer[i] = first_free_addr;
am_writeword (dev, hdr_addr, first_free_addr);
am_writeword (dev, hdr_addr + 2, TMD_STP|TMD_ENP);
am_writeword (dev, hdr_addr + 4, 0xf000);
am_writeword (dev, hdr_addr + 6, 0);
first_free_addr += 1600;
hdr_addr += 8;
}
write_rreg (dev->base_addr, BASERXL, priv->rxhdr);
write_rreg (dev->base_addr, BASERXH, 0);
write_rreg (dev->base_addr, BASETXL, priv->txhdr);
write_rreg (dev->base_addr, BASERXH, 0);
write_rreg (dev->base_addr, CSR0, CSR0_STOP);
write_rreg (dev->base_addr, CSR3, CSR3_IDONM|CSR3_BABLM|CSR3_DXSUFLO);
write_rreg (dev->base_addr, CSR4, CSR4_APAD_XMIT|CSR4_MFCOM|CSR4_RCVCCOM|CSR4_TXSTRTM|CSR4_JABM);
write_rreg (dev->base_addr, CSR0, CSR0_IENA|CSR0_STRT);
}
static void am79c961_timer(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct dev_priv *priv = netdev_priv(dev);
unsigned int lnkstat, carrier;
lnkstat = read_ireg(dev->base_addr, ISALED0) & ISALED0_LNKST;
carrier = netif_carrier_ok(dev);
if (lnkstat && !carrier) {
netif_carrier_on(dev);
printk("%s: link up\n", dev->name);
} else if (!lnkstat && carrier) {
netif_carrier_off(dev);
printk("%s: link down\n", dev->name);
}
mod_timer(&priv->timer, jiffies + msecs_to_jiffies(500));
}
/*
* Open/initialize the board.
*/
static int
am79c961_open(struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
int ret;
ret = request_irq(dev->irq, am79c961_interrupt, 0, dev->name, dev);
if (ret)
return ret;
am79c961_init_for_open(dev);
netif_carrier_off(dev);
priv->timer.expires = jiffies;
add_timer(&priv->timer);
netif_start_queue(dev);
return 0;
}
/*
* The inverse routine to am79c961_open().
*/
static int
am79c961_close(struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
unsigned long flags;
del_timer_sync(&priv->timer);
netif_stop_queue(dev);
netif_carrier_off(dev);
spin_lock_irqsave(&priv->chip_lock, flags);
write_rreg (dev->base_addr, CSR0, CSR0_STOP);
write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
spin_unlock_irqrestore(&priv->chip_lock, flags);
free_irq (dev->irq, dev);
return 0;
}
/*
* Set or clear promiscuous/multicast mode filter for this adapter.
*/
static void am79c961_setmulticastlist (struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
unsigned long flags;
u16 multi_hash[4], mode = am79c961_get_rx_mode(dev, multi_hash);
int i, stopped;
spin_lock_irqsave(&priv->chip_lock, flags);
stopped = read_rreg(dev->base_addr, CSR0) & CSR0_STOP;
if (!stopped) {
/*
* Put the chip into suspend mode
*/
write_rreg(dev->base_addr, CTRL1, CTRL1_SPND);
/*
* Spin waiting for chip to report suspend mode
*/
while ((read_rreg(dev->base_addr, CTRL1) & CTRL1_SPND) == 0) {
spin_unlock_irqrestore(&priv->chip_lock, flags);
nop();
spin_lock_irqsave(&priv->chip_lock, flags);
}
}
/*
* Update the multicast hash table
*/
for (i = 0; i < ARRAY_SIZE(multi_hash); i++)
write_rreg(dev->base_addr, i + LADRL, multi_hash[i]);
/*
* Write the mode register
*/
write_rreg(dev->base_addr, MODE, mode);
if (!stopped) {
/*
* Put the chip back into running mode
*/
write_rreg(dev->base_addr, CTRL1, 0);
}
spin_unlock_irqrestore(&priv->chip_lock, flags);
}
static void am79c961_timeout(struct net_device *dev)
{
printk(KERN_WARNING "%s: transmit timed out, network cable problem?\n",
dev->name);
/*
* ought to do some setup of the tx side here
*/
netif_wake_queue(dev);
}
/*
* Transmit a packet
*/
static int
am79c961_sendpacket(struct sk_buff *skb, struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
unsigned int hdraddr, bufaddr;
unsigned int head;
unsigned long flags;
head = priv->txhead;
hdraddr = priv->txhdr + (head << 3);
bufaddr = priv->txbuffer[head];
head += 1;
if (head >= TX_BUFFERS)
head = 0;
am_writebuffer (dev, bufaddr, skb->data, skb->len);
am_writeword (dev, hdraddr + 4, -skb->len);
am_writeword (dev, hdraddr + 2, TMD_OWN|TMD_STP|TMD_ENP);
priv->txhead = head;
spin_lock_irqsave(&priv->chip_lock, flags);
write_rreg (dev->base_addr, CSR0, CSR0_TDMD|CSR0_IENA);
spin_unlock_irqrestore(&priv->chip_lock, flags);
/*
* If the next packet is owned by the ethernet device,
* then the tx ring is full and we can't add another
* packet.
*/
if (am_readword(dev, priv->txhdr + (priv->txhead << 3) + 2) & TMD_OWN)
netif_stop_queue(dev);
dev_kfree_skb(skb);
return NETDEV_TX_OK;
}
/*
* If we have a good packet(s), get it/them out of the buffers.
*/
static void
am79c961_rx(struct net_device *dev, struct dev_priv *priv)
{
do {
struct sk_buff *skb;
u_int hdraddr;
u_int pktaddr;
u_int status;
int len;
hdraddr = priv->rxhdr + (priv->rxtail << 3);
pktaddr = priv->rxbuffer[priv->rxtail];
status = am_readword (dev, hdraddr + 2);
if (status & RMD_OWN) /* do we own it? */
break;
priv->rxtail ++;
if (priv->rxtail >= RX_BUFFERS)
priv->rxtail = 0;
if ((status & (RMD_ERR|RMD_STP|RMD_ENP)) != (RMD_STP|RMD_ENP)) {
am_writeword (dev, hdraddr + 2, RMD_OWN);
dev->stats.rx_errors++;
if (status & RMD_ERR) {
if (status & RMD_FRAM)
dev->stats.rx_frame_errors++;
if (status & RMD_CRC)
dev->stats.rx_crc_errors++;
} else if (status & RMD_STP)
dev->stats.rx_length_errors++;
continue;
}
len = am_readword(dev, hdraddr + 6);
skb = dev_alloc_skb(len + 2);
if (skb) {
skb_reserve(skb, 2);
am_readbuffer(dev, pktaddr, skb_put(skb, len), len);
am_writeword(dev, hdraddr + 2, RMD_OWN);
skb->protocol = eth_type_trans(skb, dev);
netif_rx(skb);
dev->stats.rx_bytes += len;
dev->stats.rx_packets++;
} else {
am_writeword (dev, hdraddr + 2, RMD_OWN);
printk (KERN_WARNING "%s: memory squeeze, dropping packet.\n", dev->name);
dev->stats.rx_dropped++;
break;
}
} while (1);
}
/*
* Update stats for the transmitted packet
*/
static void
am79c961_tx(struct net_device *dev, struct dev_priv *priv)
{
do {
short len;
u_int hdraddr;
u_int status;
hdraddr = priv->txhdr + (priv->txtail << 3);
status = am_readword (dev, hdraddr + 2);
if (status & TMD_OWN)
break;
priv->txtail ++;
if (priv->txtail >= TX_BUFFERS)
priv->txtail = 0;
if (status & TMD_ERR) {
u_int status2;
dev->stats.tx_errors++;
status2 = am_readword (dev, hdraddr + 6);
/*
* Clear the error byte
*/
am_writeword (dev, hdraddr + 6, 0);
if (status2 & TST_RTRY)
dev->stats.collisions += 16;
if (status2 & TST_LCOL)
dev->stats.tx_window_errors++;
if (status2 & TST_LCAR)
dev->stats.tx_carrier_errors++;
if (status2 & TST_UFLO)
dev->stats.tx_fifo_errors++;
continue;
}
dev->stats.tx_packets++;
len = am_readword (dev, hdraddr + 4);
dev->stats.tx_bytes += -len;
} while (priv->txtail != priv->txhead);
netif_wake_queue(dev);
}
static irqreturn_t
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 13:55:46 +00:00
am79c961_interrupt(int irq, void *dev_id)
{
struct net_device *dev = (struct net_device *)dev_id;
struct dev_priv *priv = netdev_priv(dev);
u_int status, n = 100;
int handled = 0;
do {
status = read_rreg(dev->base_addr, CSR0);
write_rreg(dev->base_addr, CSR0, status &
(CSR0_IENA|CSR0_TINT|CSR0_RINT|
CSR0_MERR|CSR0_MISS|CSR0_CERR|CSR0_BABL));
if (status & CSR0_RINT) {
handled = 1;
am79c961_rx(dev, priv);
}
if (status & CSR0_TINT) {
handled = 1;
am79c961_tx(dev, priv);
}
if (status & CSR0_MISS) {
handled = 1;
dev->stats.rx_dropped++;
}
if (status & CSR0_CERR) {
handled = 1;
mod_timer(&priv->timer, jiffies);
}
} while (--n && status & (CSR0_RINT | CSR0_TINT));
return IRQ_RETVAL(handled);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static void am79c961_poll_controller(struct net_device *dev)
{
unsigned long flags;
local_irq_save(flags);
am79c961_interrupt(dev->irq, dev);
local_irq_restore(flags);
}
#endif
/*
* Initialise the chip. Note that we always expect
* to be entered with interrupts enabled.
*/
static int
am79c961_hw_init(struct net_device *dev)
{
struct dev_priv *priv = netdev_priv(dev);
spin_lock_irq(&priv->chip_lock);
write_rreg (dev->base_addr, CSR0, CSR0_STOP);
write_rreg (dev->base_addr, CSR3, CSR3_MASKALL);
spin_unlock_irq(&priv->chip_lock);
am79c961_ramtest(dev, 0x66);
am79c961_ramtest(dev, 0x99);
return 0;
}
static void __init am79c961_banner(void)
{
static unsigned version_printed;
if (net_debug && version_printed++ == 0)
printk(KERN_INFO "%s", version);
}
static const struct net_device_ops am79c961_netdev_ops = {
.ndo_open = am79c961_open,
.ndo_stop = am79c961_close,
.ndo_start_xmit = am79c961_sendpacket,
.ndo_set_multicast_list = am79c961_setmulticastlist,
.ndo_tx_timeout = am79c961_timeout,
.ndo_validate_addr = eth_validate_addr,
.ndo_change_mtu = eth_change_mtu,
.ndo_set_mac_address = eth_mac_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = am79c961_poll_controller,
#endif
};
static int __devinit am79c961_probe(struct platform_device *pdev)
{
struct resource *res;
struct net_device *dev;
struct dev_priv *priv;
int i, ret;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (!res)
return -ENODEV;
dev = alloc_etherdev(sizeof(struct dev_priv));
ret = -ENOMEM;
if (!dev)
goto out;
SET_NETDEV_DEV(dev, &pdev->dev);
priv = netdev_priv(dev);
/*
* Fixed address and IRQ lines here.
* The PNP initialisation should have been
* done by the ether bootp loader.
*/
dev->base_addr = res->start;
ret = platform_get_irq(pdev, 0);
if (ret < 0) {
ret = -ENODEV;
goto nodev;
}
dev->irq = ret;
ret = -ENODEV;
if (!request_region(dev->base_addr, 0x18, dev->name))
goto nodev;
/*
* Reset the device.
*/
inb(dev->base_addr + NET_RESET);
udelay(5);
/*
* Check the manufacturer part of the
* ether address.
*/
if (inb(dev->base_addr) != 0x08 ||
inb(dev->base_addr + 2) != 0x00 ||
inb(dev->base_addr + 4) != 0x2b)
goto release;
for (i = 0; i < 6; i++)
dev->dev_addr[i] = inb(dev->base_addr + i * 2) & 0xff;
am79c961_banner();
spin_lock_init(&priv->chip_lock);
init_timer(&priv->timer);
priv->timer.data = (unsigned long)dev;
priv->timer.function = am79c961_timer;
if (am79c961_hw_init(dev))
goto release;
dev->netdev_ops = &am79c961_netdev_ops;
ret = register_netdev(dev);
if (ret == 0) {
printk(KERN_INFO "%s: ether address %pM\n",
dev->name, dev->dev_addr);
return 0;
}
release:
release_region(dev->base_addr, 0x18);
nodev:
free_netdev(dev);
out:
return ret;
}
static struct platform_driver am79c961_driver = {
.probe = am79c961_probe,
.driver = {
.name = "am79c961",
},
};
static int __init am79c961_init(void)
{
return platform_driver_register(&am79c961_driver);
}
__initcall(am79c961_init);