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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"
#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, "Error: i2c index out of bounds: %u.", bus);
return;
}
i2c_ctrlr[bus].bar = bar;
}
#endif
__weak void mainboard_i2c_override(int bus, uint32_t *pad_settings) { }
void soc_i2c_misc_init(unsigned int bus, const struct dw_i2c_bus_config *cfg)
{
uint32_t pad_ctrl;
int misc_reg;
misc_reg = MISC_I2C0_PAD_CTRL + sizeof(uint32_t) * bus;
pad_ctrl = misc_read32(misc_reg);
pad_ctrl &= ~I2C_PAD_CTRL_NG_MASK;
pad_ctrl |= I2C_PAD_CTRL_NG_NORMAL;
pad_ctrl &= ~I2C_PAD_CTRL_RX_SEL_MASK;
pad_ctrl |= I2C_PAD_CTRL_RX_SEL_3_3V;
pad_ctrl &= ~I2C_PAD_CTRL_FALLSLEW_MASK;
pad_ctrl |= cfg->speed == I2C_SPEED_STANDARD ?
I2C_PAD_CTRL_FALLSLEW_STD : I2C_PAD_CTRL_FALLSLEW_LOW;
pad_ctrl |= I2C_PAD_CTRL_FALLSLEW_EN;
mainboard_i2c_override(bus, &pad_ctrl);
misc_write32(misc_reg, pad_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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