path: root/drivers/net/ax88796.c

/* 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