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

// SPDX-License-Identifier: GPL-2.0+
/*
 * (c) 2007 Nobuhiro Iwamatsu <[email protected]>
 */
#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
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
2ef7503a JCPV	2	/*
2ef7503a JCPV	3	* (c) 2007 Nobuhiro Iwamatsu <[email protected]>
2ef7503a JCPV	4	*/
	5	#include <common.h>
	6	#include "ax88796.h"
	7
	8	/*
	9	* Set 1 bit data
	10	*/
	11	static void ax88796_bitset(u32 bit)
	12	{
	13	/* DATA1 */
	14	if( bit )
	15	EEDI_HIGH;
	16	else
	17	EEDI_LOW;
	18
	19	EECLK_LOW;
	20	udelay(1000);
	21	EECLK_HIGH;
	22	udelay(1000);
	23	EEDI_LOW;
	24	}
	25
	26	/*
	27	* Get 1 bit data
	28	*/
	29	static u8 ax88796_bitget(void)
	30	{
	31	u8 bit;
	32
	33	EECLK_LOW;
	34	udelay(1000);
	35	/* DATA */
	36	bit = EEDO;
	37	EECLK_HIGH;
	38	udelay(1000);
	39
	40	return bit;
	41	}
	42
	43	/*
	44	* Send COMMAND to EEPROM
	45	*/
	46	static void ax88796_eep_cmd(u8 cmd)
	47	{
	48	ax88796_bitset(BIT_DUMMY);
	49	switch(cmd){
	50	case MAC_EEP_READ:
	51	ax88796_bitset(1);
	52	ax88796_bitset(1);
	53	ax88796_bitset(0);
	54	break;
	55
	56	case MAC_EEP_WRITE:
	57	ax88796_bitset(1);
	58	ax88796_bitset(0);
	59	ax88796_bitset(1);
	60	break;
	61
	62	case MAC_EEP_ERACE:
	63	ax88796_bitset(1);
	64	ax88796_bitset(1);
	65	ax88796_bitset(1);
	66	break;
	67
68	case MAC_EEP_EWEN:
69	ax88796_bitset(1);
70	ax88796_bitset(0);
71	ax88796_bitset(0);
72	break;
73
74	case MAC_EEP_EWDS:
75	ax88796_bitset(1);
76	ax88796_bitset(0);
77	ax88796_bitset(0);
78	break;
79	default:
80	break;
81	}
82	}
83
84	static void ax88796_eep_setaddr(u16 addr)
85	{
86	int i ;
87
88	for( i = 7 ; i >= 0 ; i-- )
89	ax88796_bitset(addr & (1 << i));
90	}
91
92	/*
93	* Get data from EEPROM
94	*/
95	static u16 ax88796_eep_getdata(void)
96	{
97	ushort data = 0;
98	int i;
99
100	ax88796_bitget(); /* DUMMY */
101	for( i = 0 ; i < 16 ; i++ ){
102	data <<= 1;
103	data \|= ax88796_bitget();
104	}
105	return data;
106	}
107
108	static void ax88796_mac_read(u8 *buff)
109	{
110	int i ;
111	u16 data;
112	u16 addr = 0;
113
114	for( i = 0 ; i < 3; i++ )
115	{
116	EECS_HIGH;
117	EEDI_LOW;
118	udelay(1000);
119	/* READ COMMAND */
120	ax88796_eep_cmd(MAC_EEP_READ);
121	/* ADDRESS */
122	ax88796_eep_setaddr(addr++);
123	/* GET DATA */
124	data = ax88796_eep_getdata();
125	*buff++ = (uchar)(data & 0xff);
126	*buff++ = (uchar)((data >> 8) & 0xff);
127	EECLK_LOW;
128	EEDI_LOW;
129	EECS_LOW;
130	}
131	}
132
702c85b0	133	int get_prom(u8* mac_addr, u8* base_addr)
2ef7503a JCPV	134	{
	135	u8 prom[32];
	136	int i;
	137
	138	ax88796_mac_read(prom);
	139	for (i = 0; i < 6; i++){
	140	mac_addr[i] = prom[i];
	141	}
	142	return 1;
	143	}