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linux-pinenote/drivers/net/ax88796.c
Julia Lawall bcf4d812e6 drivers/net: Correct NULL test 
Test the value that was just allocated rather than the previously tested one.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@r@
expression *x;
expression e;
identifier l;
@@

if (x == NULL || ...) {
    ... when forall
    return ...; }
... when != goto l;
    when != x = e
    when != &x
*x == NULL
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-08 22:44:18 -08:00

1031 lines
25 KiB
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/* drivers/net/ax88796.c
*
* Copyright 2005,2007 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
*
* Asix AX88796 10/100 Ethernet controller support
* Based on ne.c, by Donald Becker, et-al.
*
* 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.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/isapnp.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/eeprom_93cx6.h>
#include <net/ax88796.h>
#include <asm/system.h>
#include <asm/io.h>
static int phy_debug = 0;
/* Rename the lib8390.c functions to show that they are in this driver */
#define __ei_open ax_ei_open
#define __ei_close ax_ei_close
#define __ei_poll ax_ei_poll
#define __ei_start_xmit ax_ei_start_xmit
#define __ei_tx_timeout ax_ei_tx_timeout
#define __ei_get_stats ax_ei_get_stats
#define __ei_set_multicast_list ax_ei_set_multicast_list
#define __ei_interrupt ax_ei_interrupt
#define ____alloc_ei_netdev ax__alloc_ei_netdev
#define __NS8390_init ax_NS8390_init
/* force unsigned long back to 'void __iomem *' */
#define ax_convert_addr(_a) ((void __force __iomem *)(_a))
#define ei_inb(_a) readb(ax_convert_addr(_a))
#define ei_outb(_v, _a) writeb(_v, ax_convert_addr(_a))
#define ei_inb_p(_a) ei_inb(_a)
#define ei_outb_p(_v, _a) ei_outb(_v, _a)
/* define EI_SHIFT() to take into account our register offsets */
#define EI_SHIFT(x) (ei_local->reg_offset[(x)])
/* Ensure we have our RCR base value */
#define AX88796_PLATFORM
static unsigned char version[] = "ax88796.c: Copyright 2005,2007 Simtec Electronics\n";
#include "lib8390.c"
#define DRV_NAME "ax88796"
#define DRV_VERSION "1.00"
/* from ne.c */
#define NE_CMD EI_SHIFT(0x00)
#define NE_RESET EI_SHIFT(0x1f)
#define NE_DATAPORT EI_SHIFT(0x10)
#define NE1SM_START_PG 0x20 /* First page of TX buffer */
#define NE1SM_STOP_PG 0x40 /* Last page +1 of RX ring */
#define NESM_START_PG 0x40 /* First page of TX buffer */
#define NESM_STOP_PG 0x80 /* Last page +1 of RX ring */
/* device private data */
struct ax_device {
struct timer_list mii_timer;
spinlock_t mii_lock;
struct mii_if_info mii;
u32 msg_enable;
void __iomem *map2;
struct platform_device *dev;
struct resource *mem;
struct resource *mem2;
struct ax_plat_data *plat;
unsigned char running;
unsigned char resume_open;
unsigned int irqflags;
u32 reg_offsets[0x20];
};
static inline struct ax_device *to_ax_dev(struct net_device *dev)
{
struct ei_device *ei_local = netdev_priv(dev);
return (struct ax_device *)(ei_local+1);
}
/* ax_initial_check
*
* do an initial probe for the card to check wether it exists
* and is functional
*/
static int ax_initial_check(struct net_device *dev)
{
struct ei_device *ei_local = netdev_priv(dev);
void __iomem *ioaddr = ei_local->mem;
int reg0;
int regd;
reg0 = ei_inb(ioaddr);
if (reg0 == 0xFF)
return -ENODEV;
ei_outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, ioaddr + E8390_CMD);
regd = ei_inb(ioaddr + 0x0d);
ei_outb(0xff, ioaddr + 0x0d);
ei_outb(E8390_NODMA+E8390_PAGE0, ioaddr + E8390_CMD);
ei_inb(ioaddr + EN0_COUNTER0); /* Clear the counter by reading. */
if (ei_inb(ioaddr + EN0_COUNTER0) != 0) {
ei_outb(reg0, ioaddr);
ei_outb(regd, ioaddr + 0x0d); /* Restore the old values. */
return -ENODEV;
}
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 ax_reset_8390(struct net_device *dev)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
unsigned long reset_start_time = jiffies;
void __iomem *addr = (void __iomem *)dev->base_addr;
if (ei_debug > 1)
dev_dbg(&ax->dev->dev, "resetting the 8390 t=%ld\n", jiffies);
ei_outb(ei_inb(addr + NE_RESET), addr + NE_RESET);
ei_status.txing = 0;
ei_status.dmaing = 0;
/* This check _should_not_ be necessary, omit eventually. */
while ((ei_inb(addr + EN0_ISR) & ENISR_RESET) == 0) {
if (jiffies - reset_start_time > 2*HZ/100) {
dev_warn(&ax->dev->dev, "%s: %s did not complete.\n",
__func__, dev->name);
break;
}
}
ei_outb(ENISR_RESET, addr + EN0_ISR); /* Ack intr. */
}
static void ax_get_8390_hdr(struct net_device *dev, struct e8390_pkt_hdr *hdr,
int ring_page)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
void __iomem *nic_base = ei_local->mem;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
dev_err(&ax->dev->dev, "%s: DMAing conflict in %s "
"[DMAstat:%d][irqlock:%d].\n",
dev->name, __func__,
ei_status.dmaing, ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
ei_outb(sizeof(struct e8390_pkt_hdr), nic_base + EN0_RCNTLO);
ei_outb(0, nic_base + EN0_RCNTHI);
ei_outb(0, nic_base + EN0_RSARLO); /* On page boundary */
ei_outb(ring_page, nic_base + EN0_RSARHI);
ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
if (ei_status.word16)
readsw(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr)>>1);
else
readsb(nic_base + NE_DATAPORT, hdr, sizeof(struct e8390_pkt_hdr));
ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
le16_to_cpus(&hdr->count);
}
/* 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 ei_outb. */
static void ax_block_input(struct net_device *dev, int count,
struct sk_buff *skb, int ring_offset)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
void __iomem *nic_base = ei_local->mem;
char *buf = skb->data;
if (ei_status.dmaing) {
dev_err(&ax->dev->dev,
"%s: DMAing conflict in %s "
"[DMAstat:%d][irqlock:%d].\n",
dev->name, __func__,
ei_status.dmaing, ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
ei_outb(E8390_NODMA+E8390_PAGE0+E8390_START, nic_base+ NE_CMD);
ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
ei_outb(count >> 8, nic_base + EN0_RCNTHI);
ei_outb(ring_offset & 0xff, nic_base + EN0_RSARLO);
ei_outb(ring_offset >> 8, nic_base + EN0_RSARHI);
ei_outb(E8390_RREAD+E8390_START, nic_base + NE_CMD);
if (ei_status.word16) {
readsw(nic_base + NE_DATAPORT, buf, count >> 1);
if (count & 0x01)
buf[count-1] = ei_inb(nic_base + NE_DATAPORT);
} else {
readsb(nic_base + NE_DATAPORT, buf, count);
}
ei_status.dmaing &= ~1;
}
static void ax_block_output(struct net_device *dev, int count,
const unsigned char *buf, const int start_page)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
void __iomem *nic_base = ei_local->mem;
unsigned long dma_start;
/* 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 (ei_status.word16 && (count & 0x01))
count++;
/* This *shouldn't* happen. If it does, it's the last thing you'll see */
if (ei_status.dmaing) {
dev_err(&ax->dev->dev, "%s: DMAing conflict in %s."
"[DMAstat:%d][irqlock:%d]\n",
dev->name, __func__,
ei_status.dmaing, ei_status.irqlock);
return;
}
ei_status.dmaing |= 0x01;
/* We should already be in page 0, but to be safe... */
ei_outb(E8390_PAGE0+E8390_START+E8390_NODMA, nic_base + NE_CMD);
ei_outb(ENISR_RDC, nic_base + EN0_ISR);
/* Now the normal output. */
ei_outb(count & 0xff, nic_base + EN0_RCNTLO);
ei_outb(count >> 8, nic_base + EN0_RCNTHI);
ei_outb(0x00, nic_base + EN0_RSARLO);
ei_outb(start_page, nic_base + EN0_RSARHI);
ei_outb(E8390_RWRITE+E8390_START, nic_base + NE_CMD);
if (ei_status.word16) {
writesw(nic_base + NE_DATAPORT, buf, count>>1);
} else {
writesb(nic_base + NE_DATAPORT, buf, count);
}
dma_start = jiffies;
while ((ei_inb(nic_base + EN0_ISR) & ENISR_RDC) == 0) {
if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
dev_warn(&ax->dev->dev,
"%s: timeout waiting for Tx RDC.\n", dev->name);
ax_reset_8390(dev);
ax_NS8390_init(dev,1);
break;
}
}
ei_outb(ENISR_RDC, nic_base + EN0_ISR); /* Ack intr. */
ei_status.dmaing &= ~0x01;
return;
}
/* definitions for accessing MII/EEPROM interface */
#define AX_MEMR EI_SHIFT(0x14)
#define AX_MEMR_MDC (1<<0)
#define AX_MEMR_MDIR (1<<1)
#define AX_MEMR_MDI (1<<2)
#define AX_MEMR_MDO (1<<3)
#define AX_MEMR_EECS (1<<4)
#define AX_MEMR_EEI (1<<5)
#define AX_MEMR_EEO (1<<6)
#define AX_MEMR_EECLK (1<<7)
/* ax_mii_ei_outbits
*
* write the specified set of bits to the phy
*/
static void
ax_mii_ei_outbits(struct net_device *dev, unsigned int bits, int len)
{
struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
unsigned int memr;
/* clock low, data to output mode */
memr = ei_inb(memr_addr);
memr &= ~(AX_MEMR_MDC | AX_MEMR_MDIR);
ei_outb(memr, memr_addr);
for (len--; len >= 0; len--) {
if (bits & (1 << len))
memr |= AX_MEMR_MDO;
else
memr &= ~AX_MEMR_MDO;
ei_outb(memr, memr_addr);
/* clock high */
ei_outb(memr | AX_MEMR_MDC, memr_addr);
udelay(1);
/* clock low */
ei_outb(memr, memr_addr);
}
/* leaves the clock line low, mdir input */
memr |= AX_MEMR_MDIR;
ei_outb(memr, (void __iomem *)dev->base_addr + AX_MEMR);
}
/* ax_phy_ei_inbits
*
* read a specified number of bits from the phy
*/
static unsigned int
ax_phy_ei_inbits(struct net_device *dev, int no)
{
struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
void __iomem *memr_addr = (void __iomem *)dev->base_addr + AX_MEMR;
unsigned int memr;
unsigned int result = 0;
/* clock low, data to input mode */
memr = ei_inb(memr_addr);
memr &= ~AX_MEMR_MDC;
memr |= AX_MEMR_MDIR;
ei_outb(memr, memr_addr);
for (no--; no >= 0; no--) {
ei_outb(memr | AX_MEMR_MDC, memr_addr);
udelay(1);
if (ei_inb(memr_addr) & AX_MEMR_MDI)
result |= (1<<no);
ei_outb(memr, memr_addr);
}
return result;
}
/* ax_phy_issueaddr
*
* use the low level bit shifting routines to send the address
* and command to the specified phy
*/
static void
ax_phy_issueaddr(struct net_device *dev, int phy_addr, int reg, int opc)
{
if (phy_debug)
pr_debug("%s: dev %p, %04x, %04x, %d\n",
__func__, dev, phy_addr, reg, opc);
ax_mii_ei_outbits(dev, 0x3f, 6); /* pre-amble */
ax_mii_ei_outbits(dev, 1, 2); /* frame-start */
ax_mii_ei_outbits(dev, opc, 2); /* op code */
ax_mii_ei_outbits(dev, phy_addr, 5); /* phy address */
ax_mii_ei_outbits(dev, reg, 5); /* reg address */
}
static int
ax_phy_read(struct net_device *dev, int phy_addr, int reg)
{
struct ei_device *ei_local = (struct ei_device *) netdev_priv(dev);
unsigned long flags;
unsigned int result;
spin_lock_irqsave(&ei_local->page_lock, flags);
ax_phy_issueaddr(dev, phy_addr, reg, 2);
result = ax_phy_ei_inbits(dev, 17);
result &= ~(3<<16);
spin_unlock_irqrestore(&ei_local->page_lock, flags);
if (phy_debug)
pr_debug("%s: %04x.%04x => read %04x\n", __func__,
phy_addr, reg, result);
return result;
}
static void
ax_phy_write(struct net_device *dev, int phy_addr, int reg, int value)
{
struct ei_device *ei = (struct ei_device *) netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
unsigned long flags;
dev_dbg(&ax->dev->dev, "%s: %p, %04x, %04x %04x\n",
__func__, dev, phy_addr, reg, value);
spin_lock_irqsave(&ei->page_lock, flags);
ax_phy_issueaddr(dev, phy_addr, reg, 1);
ax_mii_ei_outbits(dev, 2, 2); /* send TA */
ax_mii_ei_outbits(dev, value, 16);
spin_unlock_irqrestore(&ei->page_lock, flags);
}
static void ax_mii_expiry(unsigned long data)
{
struct net_device *dev = (struct net_device *)data;
struct ax_device *ax = to_ax_dev(dev);
unsigned long flags;
spin_lock_irqsave(&ax->mii_lock, flags);
mii_check_media(&ax->mii, netif_msg_link(ax), 0);
spin_unlock_irqrestore(&ax->mii_lock, flags);
if (ax->running) {
ax->mii_timer.expires = jiffies + HZ*2;
add_timer(&ax->mii_timer);
}
}
static int ax_open(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
struct ei_device *ei_local = netdev_priv(dev);
int ret;
dev_dbg(&ax->dev->dev, "%s: open\n", dev->name);
ret = request_irq(dev->irq, ax_ei_interrupt, ax->irqflags,
dev->name, dev);
if (ret)
return ret;
ret = ax_ei_open(dev);
if (ret)
return ret;
/* turn the phy on (if turned off) */
ei_outb(ax->plat->gpoc_val, ei_local->mem + EI_SHIFT(0x17));
ax->running = 1;
/* start the MII timer */
init_timer(&ax->mii_timer);
ax->mii_timer.expires = jiffies+1;
ax->mii_timer.data = (unsigned long) dev;
ax->mii_timer.function = ax_mii_expiry;
add_timer(&ax->mii_timer);
return 0;
}
static int ax_close(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
struct ei_device *ei_local = netdev_priv(dev);
dev_dbg(&ax->dev->dev, "%s: close\n", dev->name);
/* turn the phy off */
ei_outb(ax->plat->gpoc_val | (1<<6),
ei_local->mem + EI_SHIFT(0x17));
ax->running = 0;
wmb();
del_timer_sync(&ax->mii_timer);
ax_ei_close(dev);
free_irq(dev->irq, dev);
return 0;
}
static int ax_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
{
struct ax_device *ax = to_ax_dev(dev);
unsigned long flags;
int rc;
if (!netif_running(dev))
return -EINVAL;
spin_lock_irqsave(&ax->mii_lock, flags);
rc = generic_mii_ioctl(&ax->mii, if_mii(req), cmd, NULL);
spin_unlock_irqrestore(&ax->mii_lock, flags);
return rc;
}
/* ethtool ops */
static void ax_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *info)
{
struct ax_device *ax = to_ax_dev(dev);
strcpy(info->driver, DRV_NAME);
strcpy(info->version, DRV_VERSION);
strcpy(info->bus_info, ax->dev->name);
}
static int ax_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct ax_device *ax = to_ax_dev(dev);
unsigned long flags;
spin_lock_irqsave(&ax->mii_lock, flags);
mii_ethtool_gset(&ax->mii, cmd);
spin_unlock_irqrestore(&ax->mii_lock, flags);
return 0;
}
static int ax_set_settings(struct net_device *dev, struct ethtool_cmd *cmd)
{
struct ax_device *ax = to_ax_dev(dev);
unsigned long flags;
int rc;
spin_lock_irqsave(&ax->mii_lock, flags);
rc = mii_ethtool_sset(&ax->mii, cmd);
spin_unlock_irqrestore(&ax->mii_lock, flags);
return rc;
}
static int ax_nway_reset(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
return mii_nway_restart(&ax->mii);
}
static u32 ax_get_link(struct net_device *dev)
{
struct ax_device *ax = to_ax_dev(dev);
return mii_link_ok(&ax->mii);
}
static const struct ethtool_ops ax_ethtool_ops = {
.get_drvinfo = ax_get_drvinfo,
.get_settings = ax_get_settings,
.set_settings = ax_set_settings,
.nway_reset = ax_nway_reset,
.get_link = ax_get_link,
};
#ifdef CONFIG_AX88796_93CX6
static void ax_eeprom_register_read(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
eeprom->reg_data_in = reg & AX_MEMR_EEI;
eeprom->reg_data_out = reg & AX_MEMR_EEO; /* Input pin */
eeprom->reg_data_clock = reg & AX_MEMR_EECLK;
eeprom->reg_chip_select = reg & AX_MEMR_EECS;
}
static void ax_eeprom_register_write(struct eeprom_93cx6 *eeprom)
{
struct ei_device *ei_local = eeprom->data;
u8 reg = ei_inb(ei_local->mem + AX_MEMR);
reg &= ~(AX_MEMR_EEI | AX_MEMR_EECLK | AX_MEMR_EECS);
if (eeprom->reg_data_in)
reg |= AX_MEMR_EEI;
if (eeprom->reg_data_clock)
reg |= AX_MEMR_EECLK;
if (eeprom->reg_chip_select)
reg |= AX_MEMR_EECS;
ei_outb(reg, ei_local->mem + AX_MEMR);
udelay(10);
}
#endif
static const struct net_device_ops ax_netdev_ops = {
.ndo_open = ax_open,
.ndo_stop = ax_close,
.ndo_do_ioctl = ax_ioctl,
.ndo_start_xmit = ax_ei_start_xmit,
.ndo_tx_timeout = ax_ei_tx_timeout,
.ndo_get_stats = ax_ei_get_stats,
.ndo_set_multicast_list = ax_ei_set_multicast_list,
.ndo_validate_addr = eth_validate_addr,
.ndo_set_mac_address = eth_mac_addr,
.ndo_change_mtu = eth_change_mtu,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = ax_ei_poll,
#endif
};
/* setup code */
static void ax_initial_setup(struct net_device *dev, struct ei_device *ei_local)
{
void __iomem *ioaddr = ei_local->mem;
struct ax_device *ax = to_ax_dev(dev);
/* Select page 0*/
ei_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, ioaddr + E8390_CMD);
/* set to byte access */
ei_outb(ax->plat->dcr_val & ~1, ioaddr + EN0_DCFG);
ei_outb(ax->plat->gpoc_val, ioaddr + EI_SHIFT(0x17));
}
/* ax_init_dev
*
* initialise the specified device, taking care to note the MAC
* address it may already have (if configured), ensure
* the device is ready to be used by lib8390.c and registerd with
* the network layer.
*/
static int ax_init_dev(struct net_device *dev, int first_init)
{
struct ei_device *ei_local = netdev_priv(dev);
struct ax_device *ax = to_ax_dev(dev);
void __iomem *ioaddr = ei_local->mem;
unsigned int start_page;
unsigned int stop_page;
int ret;
int i;
ret = ax_initial_check(dev);
if (ret)
goto err_out;
/* setup goes here */
ax_initial_setup(dev, ei_local);
/* read the mac from the card prom if we need it */
if (first_init && ax->plat->flags & AXFLG_HAS_EEPROM) {
unsigned char SA_prom[32];
for(i = 0; i < sizeof(SA_prom); i+=2) {
SA_prom[i] = ei_inb(ioaddr + NE_DATAPORT);
SA_prom[i+1] = ei_inb(ioaddr + NE_DATAPORT);
}
if (ax->plat->wordlength == 2)
for (i = 0; i < 16; i++)
SA_prom[i] = SA_prom[i+i];
memcpy(dev->dev_addr, SA_prom, 6);
}
#ifdef CONFIG_AX88796_93CX6
if (first_init && ax->plat->flags & AXFLG_HAS_93CX6) {
unsigned char mac_addr[6];
struct eeprom_93cx6 eeprom;
eeprom.data = ei_local;
eeprom.register_read = ax_eeprom_register_read;
eeprom.register_write = ax_eeprom_register_write;
eeprom.width = PCI_EEPROM_WIDTH_93C56;
eeprom_93cx6_multiread(&eeprom, 0,
(__le16 __force *)mac_addr,
sizeof(mac_addr) >> 1);
memcpy(dev->dev_addr, mac_addr, 6);
}
#endif
if (ax->plat->wordlength == 2) {
/* We must set the 8390 for word mode. */
ei_outb(ax->plat->dcr_val, ei_local->mem + EN0_DCFG);
start_page = NESM_START_PG;
stop_page = NESM_STOP_PG;
} else {
start_page = NE1SM_START_PG;
stop_page = NE1SM_STOP_PG;
}
/* load the mac-address from the device if this is the
* first time we've initialised */
if (first_init) {
if (ax->plat->flags & AXFLG_MAC_FROMDEV) {
ei_outb(E8390_NODMA + E8390_PAGE1 + E8390_STOP,
ei_local->mem + E8390_CMD); /* 0x61 */
for (i = 0; i < ETHER_ADDR_LEN; i++)
dev->dev_addr[i] =
ei_inb(ioaddr + EN1_PHYS_SHIFT(i));
}
if ((ax->plat->flags & AXFLG_MAC_FROMPLATFORM) &&
ax->plat->mac_addr)
memcpy(dev->dev_addr, ax->plat->mac_addr,
ETHER_ADDR_LEN);
}
ax_reset_8390(dev);
ei_status.name = "AX88796";
ei_status.tx_start_page = start_page;
ei_status.stop_page = stop_page;
ei_status.word16 = (ax->plat->wordlength == 2);
ei_status.rx_start_page = start_page + TX_PAGES;
#ifdef PACKETBUF_MEMSIZE
/* Allow the packet buffer size to be overridden by know-it-alls. */
ei_status.stop_page = ei_status.tx_start_page + PACKETBUF_MEMSIZE;
#endif
ei_status.reset_8390 = &ax_reset_8390;
ei_status.block_input = &ax_block_input;
ei_status.block_output = &ax_block_output;
ei_status.get_8390_hdr = &ax_get_8390_hdr;
ei_status.priv = 0;
dev->netdev_ops = &ax_netdev_ops;
dev->ethtool_ops = &ax_ethtool_ops;
ax->msg_enable = NETIF_MSG_LINK;
ax->mii.phy_id_mask = 0x1f;
ax->mii.reg_num_mask = 0x1f;
ax->mii.phy_id = 0x10; /* onboard phy */
ax->mii.force_media = 0;
ax->mii.full_duplex = 0;
ax->mii.mdio_read = ax_phy_read;
ax->mii.mdio_write = ax_phy_write;
ax->mii.dev = dev;
ax_NS8390_init(dev, 0);
if (first_init)
dev_info(&ax->dev->dev, "%dbit, irq %d, %lx, MAC: %pM\n",
ei_status.word16 ? 16:8, dev->irq, dev->base_addr,
dev->dev_addr);
ret = register_netdev(dev);
if (ret)
goto out_irq;
return 0;
out_irq:
/* cleanup irq */
free_irq(dev->irq, dev);
err_out:
return ret;
}
static int ax_remove(struct platform_device *_dev)
{
struct net_device *dev = platform_get_drvdata(_dev);
struct ax_device *ax;
ax = to_ax_dev(dev);
unregister_netdev(dev);
free_irq(dev->irq, dev);
iounmap(ei_status.mem);
release_resource(ax->mem);
kfree(ax->mem);
if (ax->map2) {
iounmap(ax->map2);
release_resource(ax->mem2);
kfree(ax->mem2);
}
free_netdev(dev);
return 0;
}
/* ax_probe
*
* This is the entry point when the platform device system uses to
* notify us of a new device to attach to. Allocate memory, find
* the resources and information passed, and map the necessary registers.
*/
static int ax_probe(struct platform_device *pdev)
{
struct net_device *dev;
struct ax_device *ax;
struct resource *res;
size_t size;
int ret = 0;
dev = ax__alloc_ei_netdev(sizeof(struct ax_device));
if (dev == NULL)
return -ENOMEM;
/* ok, let's setup our device */
ax = to_ax_dev(dev);
memset(ax, 0, sizeof(struct ax_device));
spin_lock_init(&ax->mii_lock);
ax->dev = pdev;
ax->plat = pdev->dev.platform_data;
platform_set_drvdata(pdev, dev);
ei_status.rxcr_base = ax->plat->rcr_val;
/* find the platform resources */
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no IRQ specified\n");
goto exit_mem;
}
dev->irq = res->start;
ax->irqflags = res->flags & IRQF_TRIGGER_MASK;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (res == NULL) {
dev_err(&pdev->dev, "no MEM specified\n");
ret = -ENXIO;
goto exit_mem;
}
size = (res->end - res->start) + 1;
/* setup the register offsets from either the platform data
* or by using the size of the resource provided */
if (ax->plat->reg_offsets)
ei_status.reg_offset = ax->plat->reg_offsets;
else {
ei_status.reg_offset = ax->reg_offsets;
for (ret = 0; ret < 0x18; ret++)
ax->reg_offsets[ret] = (size / 0x18) * ret;
}
ax->mem = request_mem_region(res->start, size, pdev->name);
if (ax->mem == NULL) {
dev_err(&pdev->dev, "cannot reserve registers\n");
ret = -ENXIO;
goto exit_mem;
}
ei_status.mem = ioremap(res->start, size);
dev->base_addr = (unsigned long)ei_status.mem;
if (ei_status.mem == NULL) {
dev_err(&pdev->dev, "Cannot ioremap area (%08llx,%08llx)\n",
(unsigned long long)res->start,
(unsigned long long)res->end);
ret = -ENXIO;
goto exit_req;
}
/* look for reset area */
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res == NULL) {
if (!ax->plat->reg_offsets) {
for (ret = 0; ret < 0x20; ret++)
ax->reg_offsets[ret] = (size / 0x20) * ret;
}
ax->map2 = NULL;
} else {
size = (res->end - res->start) + 1;
ax->mem2 = request_mem_region(res->start, size, pdev->name);
if (ax->mem2 == NULL) {
dev_err(&pdev->dev, "cannot reserve registers\n");
ret = -ENXIO;
goto exit_mem1;
}
ax->map2 = ioremap(res->start, size);
if (ax->map2 == NULL) {
dev_err(&pdev->dev, "cannot map reset register\n");
ret = -ENXIO;
goto exit_mem2;
}
ei_status.reg_offset[0x1f] = ax->map2 - ei_status.mem;
}
/* got resources, now initialise and register device */
ret = ax_init_dev(dev, 1);
if (!ret)
return 0;
if (ax->map2 == NULL)
goto exit_mem1;
iounmap(ax->map2);
exit_mem2:
release_resource(ax->mem2);
kfree(ax->mem2);
exit_mem1:
iounmap(ei_status.mem);
exit_req:
release_resource(ax->mem);
kfree(ax->mem);
exit_mem:
free_netdev(dev);
return ret;
}
/* suspend and resume */
#ifdef CONFIG_PM
static int ax_suspend(struct platform_device *dev, pm_message_t state)
{
struct net_device *ndev = platform_get_drvdata(dev);
struct ax_device *ax = to_ax_dev(ndev);
ax->resume_open = ax->running;
netif_device_detach(ndev);
ax_close(ndev);
return 0;
}
static int ax_resume(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct ax_device *ax = to_ax_dev(ndev);
ax_initial_setup(ndev, netdev_priv(ndev));
ax_NS8390_init(ndev, ax->resume_open);
netif_device_attach(ndev);
if (ax->resume_open)
ax_open(ndev);
return 0;
}
#else
#define ax_suspend NULL
#define ax_resume NULL
#endif
static struct platform_driver axdrv = {
.driver = {
.name = "ax88796",
.owner = THIS_MODULE,
},
.probe = ax_probe,
.remove = ax_remove,
.suspend = ax_suspend,
.resume = ax_resume,
};
static int __init axdrv_init(void)
{
return platform_driver_register(&axdrv);
}
static void __exit axdrv_exit(void)
{
platform_driver_unregister(&axdrv);
}
module_init(axdrv_init);
module_exit(axdrv_exit);
MODULE_DESCRIPTION("AX88796 10/100 Ethernet platform driver");
MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:ax88796");
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