etherh.c

linux-2.6.15.6

/*
 *  linux/drivers/acorn/net/etherh.c
 *
 *  Copyright (C) 2000-2002 Russell King
 *
 * 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.
 *
 * NS8390 I-cubed EtherH and ANT EtherM specific driver
 * Thanks to I-Cubed for information on their cards.
 * EtherM conversion (C) 1999 Chris Kemp and Tim Watterton
 * EtherM integration (C) 2000 Aleph One Ltd (Tak-Shing Chan)
 * EtherM integration re-engineered by Russell King.
 *
 * Changelog:
 *  08-12-1996	RMK	1.00	Created
 *		RMK	1.03	Added support for EtherLan500 cards
 *  23-11-1997	RMK	1.04	Added media autodetection
 *  16-04-1998	RMK	1.05	Improved media autodetection
 *  10-02-2000	RMK	1.06	Updated for 2.3.43
 *  13-05-2000	RMK	1.07	Updated for 2.3.99-pre8
 *  12-10-1999  CK/TEW		EtherM driver first release
 *  21-12-2000	TTC		EtherH/EtherM integration
 *  25-12-2000	RMK	1.08	Clean integration of EtherM into this driver.
 *  03-01-2002	RMK	1.09	Always enable IRQs if we're in the nic slot.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/skbuff.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/bitops.h>

#include <asm/system.h>
#include <asm/ecard.h>
#include <asm/io.h>
#include <asm/irq.h>

#include "../8390.h"

#define NET_DEBUG  0
#define DEBUG_INIT 2

#define DRV_NAME	"etherh"
#define DRV_VERSION	"1.11"

static unsigned int net_debug = NET_DEBUG;

struct etherh_priv {
	void __iomem	*ioc_fast;
	void __iomem	*memc;
	void __iomem	*dma_base;
	unsigned int	id;
	void __iomem	*ctrl_port;
	unsigned char	ctrl;
	u32		supported;
};

struct etherh_data {
	unsigned long	ns8390_offset;
	unsigned long	dataport_offset;
	unsigned long	ctrlport_offset;
	int		ctrl_ioc;
	const char	name[16];
	u32		supported;
	unsigned char	tx_start_page;
	unsigned char	stop_page;
};

MODULE_AUTHOR("Russell King");
MODULE_DESCRIPTION("EtherH/EtherM driver");
MODULE_LICENSE("GPL");

static char version[] __initdata =
	"EtherH/EtherM Driver (c) 2002-2004 Russell King " DRV_VERSION "\n";

#define ETHERH500_DATAPORT	0x800	/* MEMC */
#define ETHERH500_NS8390	0x000	/* MEMC */
#define ETHERH500_CTRLPORT	0x800	/* IOC  */

#define ETHERH600_DATAPORT	0x040	/* MEMC */
#define ETHERH600_NS8390	0x800	/* MEMC */
#define ETHERH600_CTRLPORT	0x200	/* MEMC */

#define ETHERH_CP_IE		1
#define ETHERH_CP_IF		2
#define ETHERH_CP_HEARTBEAT	2

#define ETHERH_TX_START_PAGE	1
#define ETHERH_STOP_PAGE	127

/*
 * These came from CK/TEW
 */
#define ETHERM_DATAPORT		0x200	/* MEMC */
#define ETHERM_NS8390		0x800	/* MEMC */
#define ETHERM_CTRLPORT		0x23c	/* MEMC */

#define ETHERM_TX_START_PAGE	64
#define ETHERM_STOP_PAGE	127

/* ------------------------------------------------------------------------ */

#define etherh_priv(dev) \
 ((struct etherh_priv *)(((char *)netdev_priv(dev)) + sizeof(struct ei_device)))

static inline void etherh_set_ctrl(struct etherh_priv *eh, unsigned char mask)
{
	unsigned char ctrl = eh->ctrl | mask;
	eh->ctrl = ctrl;
	writeb(ctrl, eh->ctrl_port);
}

static inline void etherh_clr_ctrl(struct etherh_priv *eh, unsigned char mask)
{
	unsigned char ctrl = eh->ctrl & ~mask;
	eh->ctrl = ctrl;
	writeb(ctrl, eh->ctrl_port);
}

static inline unsigned int etherh_get_stat(struct etherh_priv *eh)
{
	return readb(eh->ctrl_port);
}




static void etherh_irq_enable(ecard_t *ec, int irqnr)
{
	struct etherh_priv *eh = ec->irq_data;

	etherh_set_ctrl(eh, ETHERH_CP_IE);
}

static void etherh_irq_disable(ecard_t *ec, int irqnr)
{
	struct etherh_priv *eh = ec->irq_data;

	etherh_clr_ctrl(eh, ETHERH_CP_IE);
}

static expansioncard_ops_t etherh_ops = {
	.irqenable	= etherh_irq_enable,
	.irqdisable	= etherh_irq_disable,
};




static void
etherh_setif(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	unsigned long flags;
	void __iomem *addr;

	local_irq_save(flags);

	/* set the interface type */
	switch (etherh_priv(dev)->id) {
	case PROD_I3_ETHERLAN600:
	case PROD_I3_ETHERLAN600A:
		addr = (void *)dev->base_addr + EN0_RCNTHI;

		switch (dev->if_port) {
		case IF_PORT_10BASE2:
			writeb((readb(addr) & 0xf8) | 1, addr);
			break;
		case IF_PORT_10BASET:
			writeb((readb(addr) & 0xf8), addr);
			break;
		}
		break;

	case PROD_I3_ETHERLAN500:
		switch (dev->if_port) {
		case IF_PORT_10BASE2:
			etherh_clr_ctrl(etherh_priv(dev), ETHERH_CP_IF);
			break;

		case IF_PORT_10BASET:
			etherh_set_ctrl(etherh_priv(dev), ETHERH_CP_IF);
			break;
		}
		break;

	default:
		break;
	}

	local_irq_restore(flags);
}

static int
etherh_getifstat(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *addr;
	int stat = 0;

	switch (etherh_priv(dev)->id) {
	case PROD_I3_ETHERLAN600:
	case PROD_I3_ETHERLAN600A:
		addr = (void *)dev->base_addr + EN0_RCNTHI;
		switch (dev->if_port) {
		case IF_PORT_10BASE2:
			stat = 1;
			break;
		case IF_PORT_10BASET:
			stat = readb(addr) & 4;
			break;
		}
		break;

	case PROD_I3_ETHERLAN500:
		switch (dev->if_port) {
		case IF_PORT_10BASE2:
			stat = 1;
			break;
		case IF_PORT_10BASET:
			stat = etherh_get_stat(etherh_priv(dev)) & ETHERH_CP_HEARTBEAT;
			break;
		}
		break;

	default:
		stat = 0;
		break;
	}

	return stat != 0;
}

/*
 * Configure the interface.  Note that we ignore the other
 * parts of ifmap, since its mostly meaningless for this driver.
 */
static int etherh_set_config(struct net_device *dev, struct ifmap *map)
{
	switch (map->port) {
	case IF_PORT_10BASE2:
	case IF_PORT_10BASET:
		/*
		 * If the user explicitly sets the interface
		 * media type, turn off automedia detection.
		 */
		dev->flags &= ~IFF_AUTOMEDIA;
		dev->if_port = map->port;
		break;

	default:
		return -EINVAL;
	}

	etherh_setif(dev);

	return 0;
}

/*
 * Reset the 8390 (hard reset).  Note that we can't actually do this.
 */
static void
etherh_reset(struct net_device *dev)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *addr = (void *)dev->base_addr;

	writeb(E8390_NODMA+E8390_PAGE0+E8390_STOP, addr);

	/*
	 * See if we need to change the interface type.
	 * Note that we use 'interface_num' as a flag
	 * to indicate that we need to change the media.
	 */
	if (dev->flags & IFF_AUTOMEDIA && ei_local->interface_num) {
		ei_local->interface_num = 0;

		if (dev->if_port == IF_PORT_10BASET)
			dev->if_port = IF_PORT_10BASE2;
		else
			dev->if_port = IF_PORT_10BASET;

		etherh_setif(dev);
	}
}

/*
 * Write a block of data out to the 8390
 */
static void
etherh_block_output (struct net_device *dev, int count, const unsigned char *buf, int start_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	unsigned long dma_start;
	void __iomem *dma_base, *addr;

	if (ei_local->dmaing) {
		printk(KERN_ERR "%s: DMAing conflict in etherh_block_input: "
			" DMAstat %d irqlock %d\n", dev->name,
			ei_local->dmaing, ei_local->irqlock);
		return;
	}

	/*
	 * Make sure we have a round number of bytes if we're in word mode.
	 */
	if (count & 1 && ei_local->word16)
		count++;

	ei_local->dmaing = 1;

	addr = (void *)dev->base_addr;
	dma_base = etherh_priv(dev)->dma_base;

	count = (count + 1) & ~1;
	writeb (E8390_NODMA | E8390_PAGE0 | E8390_START, addr + E8390_CMD);

	writeb (0x42, addr + EN0_RCNTLO);
	writeb (0x00, addr + EN0_RCNTHI);
	writeb (0x42, addr + EN0_RSARLO);
	writeb (0x00, addr + EN0_RSARHI);
	writeb (E8390_RREAD | E8390_START, addr + E8390_CMD);

	udelay (1);

	writeb (ENISR_RDC, addr + EN0_ISR);
	writeb (count, addr + EN0_RCNTLO);
	writeb (count >> 8, addr + EN0_RCNTHI);
	writeb (0, addr + EN0_RSARLO);
	writeb (start_page, addr + EN0_RSARHI);
	writeb (E8390_RWRITE | E8390_START, addr + E8390_CMD);

	if (ei_local->word16)
		writesw (dma_base, buf, count >> 1);
	else
		writesb (dma_base, buf, count);

	dma_start = jiffies;

	while ((readb (addr + EN0_ISR) & ENISR_RDC) == 0)
		if (jiffies - dma_start > 2*HZ/100) { /* 20ms */
			printk(KERN_ERR "%s: timeout waiting for TX RDC\n",
				dev->name);
			etherh_reset (dev);
			NS8390_init (dev, 1);
			break;
		}

	writeb (ENISR_RDC, addr + EN0_ISR);
	ei_local->dmaing = 0;
}

/*
 * Read a block of data from the 8390
 */
static void
etherh_block_input (struct net_device *dev, int count, struct sk_buff *skb, int ring_offset)
{
	struct ei_device *ei_local = netdev_priv(dev);
	unsigned char *buf;
	void __iomem *dma_base, *addr;

	if (ei_local->dmaing) {
		printk(KERN_ERR "%s: DMAing conflict in etherh_block_input: "
			" DMAstat %d irqlock %d\n", dev->name,
			ei_local->dmaing, ei_local->irqlock);
		return;
	}

	ei_local->dmaing = 1;

	addr = (void *)dev->base_addr;
	dma_base = etherh_priv(dev)->dma_base;

	buf = skb->data;
	writeb (E8390_NODMA | E8390_PAGE0 | E8390_START, addr + E8390_CMD);
	writeb (count, addr + EN0_RCNTLO);
	writeb (count >> 8, addr + EN0_RCNTHI);
	writeb (ring_offset, addr + EN0_RSARLO);
	writeb (ring_offset >> 8, addr + EN0_RSARHI);
	writeb (E8390_RREAD | E8390_START, addr + E8390_CMD);

	if (ei_local->word16) {
		readsw (dma_base, buf, count >> 1);
		if (count & 1)
			buf[count - 1] = readb (dma_base);
	} else
		readsb (dma_base, buf, count);

	writeb (ENISR_RDC, addr + EN0_ISR);
	ei_local->dmaing = 0;
}

/*
 * Read a header from the 8390
 */
static void
etherh_get_header (struct net_device *dev, struct e8390_pkt_hdr *hdr, int ring_page)
{
	struct ei_device *ei_local = netdev_priv(dev);
	void __iomem *dma_base, *addr;

	if (ei_local->dmaing) {
		printk(KERN_ERR "%s: DMAing conflict in etherh_get_header: "
			" DMAstat %d irqlock %d\n", dev->name,
			ei_local->dmaing, ei_local->irqlock);
		return;
	}

	ei_local->dmaing = 1;

	addr = (void *)dev->base_addr;
	dma_base = etherh_priv(dev)->dma_base;