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

/*
 * (c) 2007 Nobuhiro Iwamatsu <[email protected]>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */
#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 <[email protected]>
	3	*
1a459660	4	* SPDX-License-Identifier: GPL-2.0+
2ef7503a JCPV	5	*/
	6	#include <common.h>
	7	#include "ax88796.h"
	8
	9	/*
	10	* Set 1 bit data
	11	*/
	12	static void ax88796_bitset(u32 bit)
	13	{
	14	/* DATA1 */
	15	if( bit )
	16	EEDI_HIGH;
	17	else
	18	EEDI_LOW;
	19
	20	EECLK_LOW;
	21	udelay(1000);
	22	EECLK_HIGH;
	23	udelay(1000);
	24	EEDI_LOW;
	25	}
	26
	27	/*
	28	* Get 1 bit data
	29	*/
	30	static u8 ax88796_bitget(void)
	31	{
	32	u8 bit;
	33
	34	EECLK_LOW;
	35	udelay(1000);
	36	/* DATA */
	37	bit = EEDO;
	38	EECLK_HIGH;
	39	udelay(1000);
	40
	41	return bit;
	42	}
	43
	44	/*
	45	* Send COMMAND to EEPROM
	46	*/
	47	static void ax88796_eep_cmd(u8 cmd)
	48	{
	49	ax88796_bitset(BIT_DUMMY);
	50	switch(cmd){
	51	case MAC_EEP_READ:
	52	ax88796_bitset(1);
	53	ax88796_bitset(1);
	54	ax88796_bitset(0);
	55	break;
	56
	57	case MAC_EEP_WRITE:
	58	ax88796_bitset(1);
	59	ax88796_bitset(0);
	60	ax88796_bitset(1);
	61	break;
	62
	63	case MAC_EEP_ERACE:
	64	ax88796_bitset(1);
	65	ax88796_bitset(1);
	66	ax88796_bitset(1);
	67	break;
	68
69	case MAC_EEP_EWEN:
70	ax88796_bitset(1);
71	ax88796_bitset(0);
72	ax88796_bitset(0);
73	break;
74
75	case MAC_EEP_EWDS:
76	ax88796_bitset(1);
77	ax88796_bitset(0);
78	ax88796_bitset(0);
79	break;
80	default:
81	break;
82	}
83	}
84
85	static void ax88796_eep_setaddr(u16 addr)
86	{
87	int i ;
88
89	for( i = 7 ; i >= 0 ; i-- )
90	ax88796_bitset(addr & (1 << i));
91	}
92
93	/*
94	* Get data from EEPROM
95	*/
96	static u16 ax88796_eep_getdata(void)
97	{
98	ushort data = 0;
99	int i;
100
101	ax88796_bitget(); /* DUMMY */
102	for( i = 0 ; i < 16 ; i++ ){
103	data <<= 1;
104	data \|= ax88796_bitget();
105	}
106	return data;
107	}
108
109	static void ax88796_mac_read(u8 *buff)
110	{
111	int i ;
112	u16 data;
113	u16 addr = 0;
114
115	for( i = 0 ; i < 3; i++ )
116	{
117	EECS_HIGH;
118	EEDI_LOW;
119	udelay(1000);
120	/* READ COMMAND */
121	ax88796_eep_cmd(MAC_EEP_READ);
122	/* ADDRESS */
123	ax88796_eep_setaddr(addr++);
124	/* GET DATA */
125	data = ax88796_eep_getdata();
126	*buff++ = (uchar)(data & 0xff);
127	*buff++ = (uchar)((data >> 8) & 0xff);
128	EECLK_LOW;
129	EEDI_LOW;
130	EECS_LOW;
131	}
132	}
133
702c85b0	134	int get_prom(u8* mac_addr, u8* base_addr)
2ef7503a JCPV	135	{
	136	u8 prom[32];
	137	int i;
	138
	139	ax88796_mac_read(prom);
	140	for (i = 0; i < 6; i++){
	141	mac_addr[i] = prom[i];
	142	}
	143	return 1;
	144	}