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/*
* Copyright 2012 Freescale Semiconductor, Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#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, 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);
}
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