src/soc/amd/genoa_poc/i2c.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/i2c.h>
   4 #include <soc/i2c.h>
   5 #include <soc/southbridge.h>
   6 #include <static.h>
   7 #include "chip.h"
   8
   9 /* Table to switch SCL pins to outputs to initially reset the I2C peripherals */
  10 static const struct soc_i2c_scl_pin i2c_scl_pins[] = {
  11         I2C_RESET_SCL_PIN(I2C0_SCL_PIN, GPIO_I2C0_SCL),
  12         I2C_RESET_SCL_PIN(I2C1_SCL_PIN, GPIO_I2C1_SCL),
  13         I2C_RESET_SCL_PIN(I2C2_SCL_PIN, GPIO_I2C2_SCL),
  14         I2C_RESET_SCL_PIN(I2C3_SCL_PIN, GPIO_I2C3_SCL),
  15         I2C_RESET_SCL_PIN(I2C4_SCL_PIN, GPIO_I2C4_SCL),
  16         I2C_RESET_SCL_PIN(I2C5_SCL_PIN, GPIO_I2C5_SCL),
  17 };
  18
  19 static const struct soc_i2c_ctrlr_info i2c_ctrlr[I2C_CTRLR_COUNT] = {
  20         { I2C_MASTER_MODE, APU_I2C0_BASE, "I2C0" },
  21         { I2C_MASTER_MODE, APU_I2C1_BASE, "I2C1" },
  22         { I2C_MASTER_MODE, APU_I2C2_BASE, "I2C2" },
  23         { I2C_MASTER_MODE, APU_I2C3_BASE, "I2C3" },
  24         { I2C_MASTER_MODE, APU_I2C4_BASE, "I2C4" },
  25         { I2C_MASTER_MODE, APU_I2C5_BASE, "I2C5" }
  26 };
  27
  28 void reset_i2c_peripherals(void)
  29 {
  30         const struct soc_amd_genoa_poc_config *cfg = config_of_soc();
  31         struct soc_i2c_peripheral_reset_info reset_info;
  32
  33         reset_info.i2c_scl_reset_mask = cfg->i2c_scl_reset & GPIO_I2C_MASK;
  34         reset_info.i2c_scl = i2c_scl_pins;
  35         reset_info.num_pins = ARRAY_SIZE(i2c_scl_pins);
  36         sb_reset_i2c_peripherals(&reset_info);
  37 }
  38
  39 void soc_i2c_misc_init(unsigned int bus, const struct dw_i2c_bus_config *cfg)
  40 {
  41         /* TODO: write I2C pad control registers */
  42 }
  43
  44 const struct soc_i2c_ctrlr_info *soc_get_i2c_ctrlr_info(size_t *num_ctrlrs)
  45 {
  46         *num_ctrlrs = ARRAY_SIZE(i2c_ctrlr);
  47         return i2c_ctrlr;
  48 }
  49
  50 const struct dw_i2c_bus_config *soc_get_i2c_bus_config(size_t *num_buses)
  51 {
  52         const struct soc_amd_genoa_poc_config *config = config_of_soc();
  53
  54         *num_buses = ARRAY_SIZE(config->i2c);
  55         return config->i2c;
  56 }