[people/ms/u-boot.git] / drivers / net / ax88796.c

/*
 * (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
#include <common.h>
#include "ax88796.h"

/*
 * Set 1 bit data
 */
static void ax88796_bitset(u32 bit)
{
	/* DATA1 */
	if( bit )
		EEDI_HIGH;
	else
		EEDI_LOW;

	EECLK_LOW;
	udelay(1000);
	EECLK_HIGH;
	udelay(1000);
	EEDI_LOW;
}

/*
 * Get 1 bit data
 */
static u8 ax88796_bitget(void)
{
	u8 bit;

	EECLK_LOW;
	udelay(1000);
	/* DATA */
	bit = EEDO;
	EECLK_HIGH;
	udelay(1000);

	return bit;
}

/*
 * Send COMMAND to EEPROM
 */
static void ax88796_eep_cmd(u8 cmd)
{
	ax88796_bitset(BIT_DUMMY);
	switch(cmd){
		case MAC_EEP_READ:
			ax88796_bitset(1);
			ax88796_bitset(1);
			ax88796_bitset(0);
			break;

		case MAC_EEP_WRITE:
			ax88796_bitset(1);
			ax88796_bitset(0);
			ax88796_bitset(1);
			break;

		case MAC_EEP_ERACE:
			ax88796_bitset(1);
			ax88796_bitset(1);
			ax88796_bitset(1);
			break;

		case MAC_EEP_EWEN:
			ax88796_bitset(1);
			ax88796_bitset(0);
			ax88796_bitset(0);
			break;

		case MAC_EEP_EWDS:
			ax88796_bitset(1);
			ax88796_bitset(0);
			ax88796_bitset(0);
			break;
		default:
			break;
	}
}

static void ax88796_eep_setaddr(u16 addr)
{
	int i ;

	for( i = 7 ; i >= 0 ; i-- )
		ax88796_bitset(addr & (1 << i));
}

/*
 * Get data from EEPROM
 */
static u16 ax88796_eep_getdata(void)
{
	ushort data = 0;
	int i;

	ax88796_bitget();	/* DUMMY */
	for( i = 0 ; i < 16 ; i++ ){
		data <<= 1;
		data |= ax88796_bitget();
	}
	return data;
}

static void ax88796_mac_read(u8 *buff)
{
	int i ;
	u16 data;
	u16 addr = 0;

	for( i = 0 ; i < 3; i++ )
	{
		EECS_HIGH;
		EEDI_LOW;
		udelay(1000);
		/* READ COMMAND */
		ax88796_eep_cmd(MAC_EEP_READ);
		/* ADDRESS */
		ax88796_eep_setaddr(addr++);
		/* GET DATA */
		data = ax88796_eep_getdata();
		*buff++ = (uchar)(data & 0xff);
		*buff++ = (uchar)((data >> 8) & 0xff);
		EECLK_LOW;
		EEDI_LOW;
		EECS_LOW;
	}
}

int get_prom(u8* mac_addr, u8* base_addr)
{
	u8 prom[32];
	int i;

	ax88796_mac_read(prom);
	for (i = 0; i < 6; i++){
		mac_addr[i] = prom[i];
	}
	return 1;
}
Commit	Line	Data
2ef7503a JCPV	1	/*
	2	* (c) 2007 Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License as published by
	6	* the Free Software Foundation; either version 2 of the License, or
	7	* (at your option) any later version.
	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	17	*/
	18	#include <common.h>
	19	#include "ax88796.h"
	20
	21	/*
	22	* Set 1 bit data
	23	*/
	24	static void ax88796_bitset(u32 bit)
	25	{
	26	/* DATA1 */
	27	if( bit )
	28	EEDI_HIGH;
	29	else
	30	EEDI_LOW;
	31
	32	EECLK_LOW;
	33	udelay(1000);
	34	EECLK_HIGH;
	35	udelay(1000);
	36	EEDI_LOW;
	37	}
	38
	39	/*
	40	* Get 1 bit data
	41	*/
	42	static u8 ax88796_bitget(void)
	43	{
	44	u8 bit;
	45
	46	EECLK_LOW;
	47	udelay(1000);
	48	/* DATA */
	49	bit = EEDO;
	50	EECLK_HIGH;
	51	udelay(1000);
	52
	53	return bit;
	54	}
	55
	56	/*
	57	* Send COMMAND to EEPROM
	58	*/
	59	static void ax88796_eep_cmd(u8 cmd)
	60	{
	61	ax88796_bitset(BIT_DUMMY);
	62	switch(cmd){
	63	case MAC_EEP_READ:
	64	ax88796_bitset(1);
65	ax88796_bitset(1);
66	ax88796_bitset(0);
67	break;
68
69	case MAC_EEP_WRITE:
70	ax88796_bitset(1);
71	ax88796_bitset(0);
72	ax88796_bitset(1);
73	break;
74
75	case MAC_EEP_ERACE:
76	ax88796_bitset(1);
77	ax88796_bitset(1);
78	ax88796_bitset(1);
79	break;
80
81	case MAC_EEP_EWEN:
82	ax88796_bitset(1);
83	ax88796_bitset(0);
84	ax88796_bitset(0);
85	break;
86
87	case MAC_EEP_EWDS:
88	ax88796_bitset(1);
89	ax88796_bitset(0);
90	ax88796_bitset(0);
91	break;
92	default:
93	break;
94	}
95	}
96
97	static void ax88796_eep_setaddr(u16 addr)
98	{
99	int i ;
100
101	for( i = 7 ; i >= 0 ; i-- )
102	ax88796_bitset(addr & (1 << i));
103	}
104
105	/*
106	* Get data from EEPROM
107	*/
108	static u16 ax88796_eep_getdata(void)
109	{
110	ushort data = 0;
111	int i;
112
113	ax88796_bitget(); /* DUMMY */
114	for( i = 0 ; i < 16 ; i++ ){
115	data <<= 1;
116	data \|= ax88796_bitget();
117	}
118	return data;
119	}
120
121	static void ax88796_mac_read(u8 *buff)
122	{
123	int i ;
124	u16 data;
125	u16 addr = 0;
126
127	for( i = 0 ; i < 3; i++ )
128	{
129	EECS_HIGH;
130	EEDI_LOW;
131	udelay(1000);
132	/* READ COMMAND */
133	ax88796_eep_cmd(MAC_EEP_READ);
134	/* ADDRESS */
135	ax88796_eep_setaddr(addr++);
136	/* GET DATA */
137	data = ax88796_eep_getdata();
138	*buff++ = (uchar)(data & 0xff);
139	*buff++ = (uchar)((data >> 8) & 0xff);
140	EECLK_LOW;
141	EEDI_LOW;
142	EECS_LOW;
143	}
144	}
145
702c85b0	146	int get_prom(u8* mac_addr, u8* base_addr)
2ef7503a JCPV	147	{
	148	u8 prom[32];
	149	int i;
	150
	151	ax88796_mac_read(prom);
	152	for (i = 0; i < 6; i++){
	153	mac_addr[i] = prom[i];
	154	}
	155	return 1;
	156	}