summaryrefslogtreecommitdiff
path: root/board/freescale/common/vsc3316_3308.c
blob: 786856597f6f3e11f13a1d9adcfac1b297346b88 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
/*
 * Copyright 2012 Freescale Semiconductor, Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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 "vsc3316_3308.h"

#define REVISION_ID_REG		0x7E
#define INTERFACE_MODE_REG		0x79
#define CURRENT_PAGE_REGISTER		0x7F
#define CONNECTION_CONFIG_PAGE		0x00
#define INPUT_STATE_REG		0x13
#define GLOBAL_INPUT_ISE1		0x51
#define GLOBAL_INPUT_ISE2		0x52
#define GLOBAL_INPUT_LOS		0x55
#define GLOBAL_CORE_CNTRL		0x5D
#define OUTPUT_MODE_PAGE		0x23
#define CORE_CONTROL_PAGE		0x25
#define CORE_CONFIG_REG		0x75

int vsc_if_enable(unsigned int vsc_addr)
{
	u8 data;

	debug("VSC:Configuring VSC at I2C address 0x%2x"
			" for 2-wire interface\n", vsc_addr);

	/* enable 2-wire Serial InterFace (I2C) */
	data = 0x02;
	return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
}

int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
		unsigned int num_con)
{
	unsigned int i;
	u8 rev_id = 0;
	int ret;

	debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
		" for Tx\n", vsc_addr);

	ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
	if (ret < 0) {
		printf("VSC:0x%x could not read REV_ID from device.\n",
			vsc_addr);
		return ret;
	}

	if (rev_id != 0xab) {
		printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
			vsc_addr);
		return -ENODEV;
	}

	ret = vsc_if_enable(vsc_addr);
	if (ret) {
		printf("VSC:0x%x could not configured for 2-wire I/F.\n",
			vsc_addr);
		return ret;
	}

	/* config connections - page 0x00 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);

	/* Making crosspoint connections, by connecting required
	 * input to output */
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);

	/* input state - page 0x13 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
	/* Configuring the required input of the switch */
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);

	/* Setting Global Input LOS threshold value */
	i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);

	/* config output mode - page 0x23 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
	/* Turn ON the Output driver correspond to required output*/
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr,  con_arr[i][1], 0);

	/* configure global core control register, Turn on Global core power */
	i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);

	vsc_wp_config(vsc_addr);

	return 0;
}

int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
		unsigned int num_con)
{
	unsigned int i;
	u8 rev_id = 0;
	int ret;

	debug("VSC:Initializing VSC3308 at I2C address 0x%x"
		" for Tx\n", vsc_addr);

	ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
	if (ret < 0) {
		printf("VSC:0x%x could not read REV_ID from device.\n",
			vsc_addr);
		return ret;
	}

	if (rev_id != 0xab) {
		printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
			vsc_addr);
		return -ENODEV;
	}

	ret = vsc_if_enable(vsc_addr);
	if (ret) {
		printf("VSC:0x%x could not configured for 2-wire I/F.\n",
			vsc_addr);
		return ret;
	}

	/* config connections - page 0x00 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);

	/* Making crosspoint connections, by connecting required
	 * input to output */
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);

	/*Configure Global Input ISE and gain */
	i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
	i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);

	/* input state - page 0x13 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
	/* Turning ON the required input of the switch */
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr, con_arr[i][0], 0);

	/* Setting Global Input LOS threshold value */
	i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);

	/* config output mode - page 0x23 */
	i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
	/* Turn ON the Output driver correspond to required output*/
	for (i = 0; i < num_con ; i++)
		i2c_reg_write(vsc_addr,  con_arr[i][1], 0);

	/* configure global core control register, Turn on Global core power */
	i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);

	vsc_wp_config(vsc_addr);

	return 0;
}

void vsc_wp_config(unsigned int vsc_addr)
{
	debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);

	/* For new crosspoint configuration to occur, WP bit of
	 * CORE_CONFIG_REG should be set 1 and then reset to 0 */
	i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
	i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
}