1 /*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 *
4 * See file CREDITS for list of people who contributed to this
5 * project.
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License as
9 * published by the Free Software Foundation; either version 2 of
10 * the License, or (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20 * MA 02111-1307 USA
21 */
23 #include "vsc3316_3308.h"
25 #define REVISION_ID_REG 0x7E
26 #define INTERFACE_MODE_REG 0x79
27 #define CURRENT_PAGE_REGISTER 0x7F
28 #define CONNECTION_CONFIG_PAGE 0x00
29 #define INPUT_STATE_REG 0x13
30 #define GLOBAL_INPUT_ISE1 0x51
31 #define GLOBAL_INPUT_ISE2 0x52
32 #define GLOBAL_INPUT_LOS 0x55
33 #define GLOBAL_CORE_CNTRL 0x5D
34 #define OUTPUT_MODE_PAGE 0x23
35 #define CORE_CONTROL_PAGE 0x25
36 #define CORE_CONFIG_REG 0x75
38 int vsc_if_enable(unsigned int vsc_addr)
39 {
40 u8 data;
42 debug("VSC:Configuring VSC at I2C address 0x%2x"
43 " for 2-wire interface\n", vsc_addr);
45 /* enable 2-wire Serial InterFace (I2C) */
46 data = 0x02;
47 return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
48 }
50 int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
51 unsigned int num_con)
52 {
53 unsigned int i;
54 u8 rev_id = 0;
55 int ret;
57 debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
58 " for Tx\n", vsc_addr);
60 ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
61 if (ret < 0) {
62 printf("VSC:0x%x could not read REV_ID from device.\n",
63 vsc_addr);
64 return ret;
65 }
67 if (rev_id != 0xab) {
68 printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
69 vsc_addr);
70 return -ENODEV;
71 }
73 ret = vsc_if_enable(vsc_addr);
74 if (ret) {
75 printf("VSC:0x%x could not configured for 2-wire I/F.\n",
76 vsc_addr);
77 return ret;
78 }
80 /* config connections - page 0x00 */
81 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
83 /* Making crosspoint connections, by connecting required
84 * input to output */
85 for (i = 0; i < num_con ; i++)
86 i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
88 /* input state - page 0x13 */
89 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
90 /* Configuring the required input of the switch */
91 for (i = 0; i < num_con ; i++)
92 i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);
94 /* Setting Global Input LOS threshold value */
95 i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
97 /* config output mode - page 0x23 */
98 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
99 /* Turn ON the Output driver correspond to required output*/
100 for (i = 0; i < num_con ; i++)
101 i2c_reg_write(vsc_addr, con_arr[i][1], 0);
103 /* configure global core control register, Turn on Global core power */
104 i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
106 vsc_wp_config(vsc_addr);
108 return 0;
109 }
111 int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
112 unsigned int num_con)
113 {
114 unsigned int i;
115 u8 rev_id = 0;
116 int ret;
118 debug("VSC:Initializing VSC3308 at I2C address 0x%x"
119 " for Tx\n", vsc_addr);
121 ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
122 if (ret < 0) {
123 printf("VSC:0x%x could not read REV_ID from device.\n",
124 vsc_addr);
125 return ret;
126 }
128 if (rev_id != 0xab) {
129 printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
130 vsc_addr);
131 return -ENODEV;
132 }
134 ret = vsc_if_enable(vsc_addr);
135 if (ret) {
136 printf("VSC:0x%x could not configured for 2-wire I/F.\n",
137 vsc_addr);
138 return ret;
139 }
141 /* config connections - page 0x00 */
142 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
144 /* Making crosspoint connections, by connecting required
145 * input to output */
146 for (i = 0; i < num_con ; i++)
147 i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
149 /*Configure Global Input ISE and gain */
150 i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
151 i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);
153 /* input state - page 0x13 */
154 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
155 /* Turning ON the required input of the switch */
156 for (i = 0; i < num_con ; i++)
157 i2c_reg_write(vsc_addr, con_arr[i][0], 0);
159 /* Setting Global Input LOS threshold value */
160 i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
162 /* config output mode - page 0x23 */
163 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
164 /* Turn ON the Output driver correspond to required output*/
165 for (i = 0; i < num_con ; i++)
166 i2c_reg_write(vsc_addr, con_arr[i][1], 0);
168 /* configure global core control register, Turn on Global core power */
169 i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
171 vsc_wp_config(vsc_addr);
173 return 0;
174 }
176 void vsc_wp_config(unsigned int vsc_addr)
177 {
178 debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);
180 /* For new crosspoint configuration to occur, WP bit of
181 * CORE_CONFIG_REG should be set 1 and then reset to 0 */
182 i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
183 i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
184 }