| /* 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; |
| } |