diff options
Diffstat (limited to 'src/mainboard/intel/galileo/reg_access.c')
| -rw-r--r-- | src/mainboard/intel/galileo/reg_access.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/src/mainboard/intel/galileo/reg_access.c b/src/mainboard/intel/galileo/reg_access.c new file mode 100644 index 0000000000..f19f5269d7 --- /dev/null +++ b/src/mainboard/intel/galileo/reg_access.c @@ -0,0 +1,93 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2016 Intel Corp. + * + * 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; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied wacbmem_entryanty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#define __SIMPLE_DEVICE__ + +#include <arch/io.h> +#include <console/console.h> +#include <device/i2c.h> +#include <soc/pci_devs.h> +#include <soc/reg_access.h> +#include "reg_access.h" + +#if ENV_RAMSTAGE +static uint64_t reg_read(struct reg_script_context *ctx) +{ + int ret_code; + const struct reg_script *step; + uint8_t value = 0; + + step = ctx->step; + switch (step->id) { + default: + printk(BIOS_ERR, + "ERROR - Unknown register set (0x%08x)!\n", + step->id); + ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING; + break; + + case GEN1_I2C_GPIO_EXP_0x20: + case GEN1_I2C_GPIO_EXP_0x21: + case GEN2_I2C_GPIO_EXP0: + case GEN2_I2C_GPIO_EXP1: + case GEN2_I2C_GPIO_EXP2: + case GEN2_I2C_LED_PWM: + if (ctx->display_features) + printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id); + ret_code = i2c_readb(0, step->id, (UINT8)step->reg, &value); + ASSERT(ret_code == 2); + break; + } + return value; +} + +static void reg_write(struct reg_script_context *ctx) +{ + int ret_code; + const struct reg_script *step; + uint8_t value; + + step = ctx->step; + switch (step->id) { + default: + printk(BIOS_ERR, + "ERROR - Unknown register set (0x%08x)!\n", + step->id); + ctx->display_features = REG_SCRIPT_DISPLAY_NOTHING; + break; + + case GEN1_I2C_GPIO_EXP_0x20: + case GEN1_I2C_GPIO_EXP_0x21: + case GEN2_I2C_GPIO_EXP0: + case GEN2_I2C_GPIO_EXP1: + case GEN2_I2C_GPIO_EXP2: + case GEN2_I2C_LED_PWM: + case RMU_TEMP_REGS: + if (ctx->display_features) + printk(BIOS_INFO, "I2C chip 0x%02x: ", step->id); + value = (UINT8)step->value; + ret_code = i2c_writeb(0, step->id, (UINT8)step->reg, value); + ASSERT(ret_code == 2); + break; + } +} + +const struct reg_script_bus_entry mainboard_reg_script_bus_table = { + MAINBOARD_TYPE, reg_read, reg_write +}; + +REG_SCRIPT_BUS_ENTRY(mainboard_reg_script_bus_table); + +#endif /* ENV_RAMSTAGE */ |