board/freescale/common/vsc3316_3308.c

   1 /*
   2  * Copyright 2012 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   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
  22 int 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
  34 int vsc3316_config(unsigned int vsc_addr, 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
  95 int 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
 160 void 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 }