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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <amdblocks/acpimmio.h>
#include <amdblocks/i2c.h>
#include <soc/i2c.h>
#include <soc/iomap.h>
#include <soc/pci_devs.h>
#include <soc/southbridge.h>
#include "chip.h"
/* Table to switch SCL pins to outputs to initially reset the I2C peripherals */
static const struct soc_i2c_scl_pin i2c_scl_pins[] = {
I2C_RESET_SCL_PIN(I2C2_SCL_PIN, GPIO_I2C2_SCL),
I2C_RESET_SCL_PIN(I2C3_SCL_PIN, GPIO_I2C3_SCL),
/* I2C4 is a peripheral device only */
};
#if ENV_X86
/* Preferably keep all the I2C controllers operating in a specific mode together. */
static const struct soc_i2c_ctrlr_info i2c_ctrlr[I2C_CTRLR_COUNT] = {
{ I2C_MASTER_MODE, 0, "" },
{ I2C_MASTER_MODE, 0, "" },
{ I2C_MASTER_MODE, APU_I2C2_BASE, "I2C2" },
{ I2C_MASTER_MODE, APU_I2C3_BASE, "I2C3" },
{ I2C_PERIPHERAL_MODE, APU_I2C4_BASE, "I2C4" } /* Can only be used in peripheral mode */
};
#else
static struct soc_i2c_ctrlr_info i2c_ctrlr[I2C_CTRLR_COUNT] = {
{ I2C_MASTER_MODE, 0, ""},
{ I2C_MASTER_MODE, 0, "" },
{ I2C_MASTER_MODE, 0, "" },
{ I2C_MASTER_MODE, 0, "" },
{ I2C_PERIPHERAL_MODE, 0, "" },
};
void i2c_set_bar(unsigned int bus, uintptr_t bar)
{
if (bus >= ARRAY_SIZE(i2c_ctrlr)) {
printk(BIOS_ERR, "i2c index out of bounds: %u.", bus);
return;
}
i2c_ctrlr[bus].bar = bar;
}
#endif
void reset_i2c_peripherals(void)
{
const struct soc_amd_picasso_config *cfg = config_of_soc();
struct soc_i2c_peripheral_reset_info reset_info;
reset_info.i2c_scl_reset_mask = cfg->i2c_scl_reset & GPIO_I2C_MASK;
reset_info.i2c_scl = i2c_scl_pins;
reset_info.num_pins = ARRAY_SIZE(i2c_scl_pins);
sb_reset_i2c_peripherals(&reset_info);
}
void soc_i2c_misc_init(unsigned int bus, const struct dw_i2c_bus_config *cfg)
{
/* TODO: Picasso supports I2C RX pad configurations 3.3V, 1.8V and off, so make this
configurable. */
const struct i2c_pad_control ctrl = {
.rx_level = I2C_PAD_RX_3_3V,
};
fch_i2c_pad_init(bus, cfg->speed, &ctrl);
}
const struct soc_i2c_ctrlr_info *soc_get_i2c_ctrlr_info(size_t *num_ctrlrs)
{
*num_ctrlrs = ARRAY_SIZE(i2c_ctrlr);
return i2c_ctrlr;
}
const struct dw_i2c_bus_config *soc_get_i2c_bus_config(size_t *num_buses)
{
const struct soc_amd_picasso_config *config = config_of_soc();
*num_buses = ARRAY_SIZE(config->i2c);
return config->i2c;
}
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