/*
Ported to U-Boot  by Christian Pellegrin <chri@ascensit.com>

Based on sources from the Linux kernel (pcnet_cs.c, 8390.h) and
eCOS(if_dp83902a.c, if_dp83902a.h). Both of these 2 wonderful world
are GPL, so this is, of course, GPL.

==========================================================================

      dev/dp83902a.h

      National Semiconductor DP83902a ethernet chip

==========================================================================
####ECOSGPLCOPYRIGHTBEGIN####
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 with eCos; if not, write to the Free Software Foundation, Inc.,
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####ECOSGPLCOPYRIGHTEND####
####BSDCOPYRIGHTBEGIN####

 -------------------------------------------

 Portions of this software may have been derived from OpenBSD or other sources,
 and are covered by the appropriate copyright disclaimers included herein.

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####BSDCOPYRIGHTEND####
==========================================================================
#####DESCRIPTIONBEGIN####

 Author(s):    gthomas
 Contributors: gthomas, jskov
 Date:         2001-06-13
 Purpose:
 Description:

####DESCRIPTIONEND####

==========================================================================
*/

/*
 * NE2000 support header file.
 *		Created by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
 */

#ifndef __DRIVERS_NE2000_H__
#define __DRIVERS_NE2000_H__

/* Enable NE2000 basic init function */
#define NE2000_BASIC_INIT

#define DP_DATA     0x10
#define START_PG    0x50    /* First page of TX buffer */
#define STOP_PG     0x80    /* Last page +1 of RX ring */

#define RX_START    0x50
#define RX_END      0x80

#define DP_IN(_b_, _o_, _d_)  (_d_) = *( (vu_char *) ((_b_)+(_o_)))
#define DP_OUT(_b_, _o_, _d_) *( (vu_char *) ((_b_)+(_o_))) = (_d_)
#define DP_IN_DATA(_b_, _d_)  (_d_) = *( (vu_char *) ((_b_)))
#define DP_OUT_DATA(_b_, _d_) *( (vu_char *) ((_b_))) = (_d_)

static void pcnet_reset_8390(void)
{
	int i, r;

	PRINTK("nic base is %lx\n", nic_base);

	n2k_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD);
	PRINTK("cmd (at %lx) is %x\n", nic_base+ E8390_CMD, n2k_inb(E8390_CMD));
	n2k_outb(E8390_NODMA+E8390_PAGE1+E8390_STOP, E8390_CMD);
	PRINTK("cmd (at %lx) is %x\n", nic_base+ E8390_CMD, n2k_inb(E8390_CMD));
	n2k_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD);
	PRINTK("cmd (at %lx) is %x\n", nic_base+ E8390_CMD, n2k_inb(E8390_CMD));
	n2k_outb(E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD);

	n2k_outb(n2k_inb(PCNET_RESET), PCNET_RESET);

	for (i = 0; i < 100; i++) {
		if ((r = (n2k_inb(EN0_ISR) & ENISR_RESET)) != 0)
			break;
		PRINTK("got %x in reset\n", r);
		udelay(100);
	}
	n2k_outb(ENISR_RESET, EN0_ISR); /* Ack intr. */

	if (i == 100)
		printf("pcnet_reset_8390() did not complete.\n");
} /* pcnet_reset_8390 */

int get_prom(u8* mac_addr)
{
	u8 prom[32];
	int i, j;
	struct {
		u_char value, offset;
	} program_seq[] = {
		{E8390_NODMA+E8390_PAGE0+E8390_STOP, E8390_CMD}, /* Select page 0*/
		{0x48,  EN0_DCFG},		/* Set byte-wide (0x48) access. */
		{0x00,  EN0_RCNTLO},		/* Clear the count regs. */
		{0x00,  EN0_RCNTHI},
		{0x00,  EN0_IMR},		/* Mask completion irq. */
		{0xFF,  EN0_ISR},
		{E8390_RXOFF, EN0_RXCR},	/* 0x20  Set to monitor */
		{E8390_TXOFF, EN0_TXCR},	/* 0x02  and loopback mode. */
		{32,    EN0_RCNTLO},
		{0x00,  EN0_RCNTHI},
		{0x00,  EN0_RSARLO},		/* DMA starting at 0x0000. */
		{0x00,  EN0_RSARHI},
		{E8390_RREAD+E8390_START, E8390_CMD},
	};

	PRINTK ("trying to get MAC via prom reading\n");

	pcnet_reset_8390 ();

	mdelay (10);

	for (i = 0; i < sizeof (program_seq) / sizeof (program_seq[0]); i++)
		n2k_outb (program_seq[i].value, program_seq[i].offset);

	PRINTK ("PROM:");
	for (i = 0; i < 32; i++) {
		prom[i] = n2k_inb (PCNET_DATAPORT);
		PRINTK (" %02x", prom[i]);
	}
	PRINTK ("\n");
	for (i = 0; i < NR_INFO; i++) {
		if ((prom[0] == hw_info[i].a0) &&
		    (prom[2] == hw_info[i].a1) &&
		    (prom[4] == hw_info[i].a2)) {
			PRINTK ("matched board %d\n", i);
			break;
		}
	}
	if ((i < NR_INFO) || ((prom[28] == 0x57) && (prom[30] == 0x57))) {
		PRINTK ("on exit i is %d/%ld\n", i, NR_INFO);
		PRINTK ("MAC address is ");
		for (j = 0; j < 6; j++) {
			mac_addr[j] = prom[j << 1];
			PRINTK ("%02x:", mac_addr[i]);
		}
		PRINTK ("\n");
		return (i < NR_INFO) ? i : 0;
	}
	return NULL;
}
#endif /* __DRIVERS_NE2000_H__ */