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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 1a4596601fd395f3afb8f82f3f840c5e00bdd57a / . / board / freescale / common / vsc3316_3308.c
blob: 8a3dc33b66c748ccc85665c087368be2362ab452 [file] [log] [blame]
Shaveta Leekhaaa42cb72012-10-08 07:44:17 +0000[diff] [blame]1/*
2 * Copyright 2012 Freescale Semiconductor, Inc.
3 *
Wolfgang Denk1a459662013-07-08 09:37:19 +0200[diff] [blame^]4 * SPDX-License-Identifier: GPL-2.0+
Shaveta Leekhaaa42cb72012-10-08 07:44:17 +0000[diff] [blame]5 */
6
7#include "vsc3316_3308.h"
8
9#define REVISION_ID_REG 0x7E
10#define INTERFACE_MODE_REG 0x79
11#define CURRENT_PAGE_REGISTER 0x7F
12#define CONNECTION_CONFIG_PAGE 0x00
13#define INPUT_STATE_REG 0x13
14#define GLOBAL_INPUT_ISE1 0x51
15#define GLOBAL_INPUT_ISE2 0x52
16#define GLOBAL_INPUT_LOS 0x55
17#define GLOBAL_CORE_CNTRL 0x5D
18#define OUTPUT_MODE_PAGE 0x23
19#define CORE_CONTROL_PAGE 0x25
20#define CORE_CONFIG_REG 0x75
21
22int vsc_if_enable(unsigned int vsc_addr)
23{
24 u8 data;
25
26 debug("VSC:Configuring VSC at I2C address 0x%2x"
27 " for 2-wire interface\n", vsc_addr);
28
29 /* enable 2-wire Serial InterFace (I2C) */
30 data = 0x02;
31 return i2c_write(vsc_addr, INTERFACE_MODE_REG, 1, &data, 1);
32}
33
34int vsc3316_config(unsigned int vsc_addr, const int8_t con_arr[][2],
35 unsigned int num_con)
36{
37 unsigned int i;
38 u8 rev_id = 0;
39 int ret;
40
41 debug("VSC:Initializing VSC3316 at I2C address 0x%2x"
42 " for Tx\n", vsc_addr);
43
44 ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
45 if (ret < 0) {
46 printf("VSC:0x%x could not read REV_ID from device.\n",
47 vsc_addr);
48 return ret;
49 }
50
51 if (rev_id != 0xab) {
52 printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
53 vsc_addr);
54 return -ENODEV;
55 }
56
57 ret = vsc_if_enable(vsc_addr);
58 if (ret) {
59 printf("VSC:0x%x could not configured for 2-wire I/F.\n",
60 vsc_addr);
61 return ret;
62 }
63
64 /* config connections - page 0x00 */
65 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
66
67 /* Making crosspoint connections, by connecting required
68 * input to output */
69 for (i = 0; i < num_con ; i++)
70 i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
71
72 /* input state - page 0x13 */
73 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
74 /* Configuring the required input of the switch */
75 for (i = 0; i < num_con ; i++)
76 i2c_reg_write(vsc_addr, con_arr[i][0], 0x80);
77
78 /* Setting Global Input LOS threshold value */
79 i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
80
81 /* config output mode - page 0x23 */
82 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
83 /* Turn ON the Output driver correspond to required output*/
84 for (i = 0; i < num_con ; i++)
85 i2c_reg_write(vsc_addr, con_arr[i][1], 0);
86
87 /* configure global core control register, Turn on Global core power */
88 i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
89
90 vsc_wp_config(vsc_addr);
91
92 return 0;
93}
94
95int vsc3308_config(unsigned int vsc_addr, const int8_t con_arr[][2],
96 unsigned int num_con)
97{
98 unsigned int i;
99 u8 rev_id = 0;
100 int ret;
101
102 debug("VSC:Initializing VSC3308 at I2C address 0x%x"
103 " for Tx\n", vsc_addr);
104
105 ret = i2c_read(vsc_addr, REVISION_ID_REG, 1, &rev_id, 1);
106 if (ret < 0) {
107 printf("VSC:0x%x could not read REV_ID from device.\n",
108 vsc_addr);
109 return ret;
110 }
111
112 if (rev_id != 0xab) {
113 printf("VSC: device at address 0x%x is not VSC3316/3308.\n",
114 vsc_addr);
115 return -ENODEV;
116 }
117
118 ret = vsc_if_enable(vsc_addr);
119 if (ret) {
120 printf("VSC:0x%x could not configured for 2-wire I/F.\n",
121 vsc_addr);
122 return ret;
123 }
124
125 /* config connections - page 0x00 */
126 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, CONNECTION_CONFIG_PAGE);
127
128 /* Making crosspoint connections, by connecting required
129 * input to output */
130 for (i = 0; i < num_con ; i++)
131 i2c_reg_write(vsc_addr, con_arr[i][1], con_arr[i][0]);
132
133 /*Configure Global Input ISE and gain */
134 i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE1, 0x12);
135 i2c_reg_write(vsc_addr, GLOBAL_INPUT_ISE2, 0x12);
136
137 /* input state - page 0x13 */
138 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, INPUT_STATE_REG);
139 /* Turning ON the required input of the switch */
140 for (i = 0; i < num_con ; i++)
141 i2c_reg_write(vsc_addr, con_arr[i][0], 0);
142
143 /* Setting Global Input LOS threshold value */
144 i2c_reg_write(vsc_addr, GLOBAL_INPUT_LOS, 0x60);
145
146 /* config output mode - page 0x23 */
147 i2c_reg_write(vsc_addr, CURRENT_PAGE_REGISTER, OUTPUT_MODE_PAGE);
148 /* Turn ON the Output driver correspond to required output*/
149 for (i = 0; i < num_con ; i++)
150 i2c_reg_write(vsc_addr, con_arr[i][1], 0);
151
152 /* configure global core control register, Turn on Global core power */
153 i2c_reg_write(vsc_addr, GLOBAL_CORE_CNTRL, 0);
154
155 vsc_wp_config(vsc_addr);
156
157 return 0;
158}
159
160void vsc_wp_config(unsigned int vsc_addr)
161{
162 debug("VSC:Configuring VSC at address:0x%x for WP\n", vsc_addr);
163
164 /* For new crosspoint configuration to occur, WP bit of
165 * CORE_CONFIG_REG should be set 1 and then reset to 0 */
166 i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x01);
167 i2c_reg_write(vsc_addr, CORE_CONFIG_REG, 0x0);
168}