1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <amdblocks/i2c.h>
4 #include <console/console.h>
5 #include <soc/i2c.h>
6 #include <soc/southbridge.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 };
16
17 #if ENV_X86
18 static const struct soc_i2c_ctrlr_info i2c_ctrlr[I2C_CTRLR_COUNT] = {
19 { I2C_MASTER_MODE, APU_I2C0_BASE, "I2C0" },
20 { I2C_MASTER_MODE, APU_I2C1_BASE, "I2C1" },
21 { I2C_MASTER_MODE, APU_I2C2_BASE, "I2C2" },
22 { I2C_MASTER_MODE, APU_I2C3_BASE, "I2C3" }
23 };
24 #else
25 static struct soc_i2c_ctrlr_info i2c_ctrlr[I2C_CTRLR_COUNT] = {
26 { I2C_MASTER_MODE, 0, "" },
27 { I2C_MASTER_MODE, 0, "" },
28 { I2C_MASTER_MODE, 0, "" },
29 { I2C_MASTER_MODE, 0, "" }
30 };
31
i2c_set_bar(unsigned int bus,uintptr_t bar)32 void i2c_set_bar(unsigned int bus, uintptr_t bar)
33 {
34 if (bus >= ARRAY_SIZE(i2c_ctrlr)) {
35 printk(BIOS_ERR, "i2c index out of bounds: %u.", bus);
36 return;
37 }
38
39 i2c_ctrlr[bus].bar = bar;
40 }
41 #endif
42
reset_i2c_peripherals(void)43 void reset_i2c_peripherals(void)
44 {
45 const struct soc_amd_phoenix_config *cfg = config_of_soc();
46 struct soc_i2c_peripheral_reset_info reset_info;
47
48 reset_info.i2c_scl_reset_mask = cfg->i2c_scl_reset & GPIO_I2C_MASK;
49 reset_info.i2c_scl = i2c_scl_pins;
50 reset_info.num_pins = ARRAY_SIZE(i2c_scl_pins);
51 sb_reset_i2c_peripherals(&reset_info);
52 }
53
soc_i2c_misc_init(unsigned int bus,const struct dw_i2c_bus_config * cfg)54 void soc_i2c_misc_init(unsigned int bus, const struct dw_i2c_bus_config *cfg)
55 {
56 const struct soc_amd_phoenix_config *config = config_of_soc();
57
58 if (bus >= ARRAY_SIZE(config->i2c_pad))
59 return;
60
61 fch_i23c_pad_init(bus, cfg->speed, &config->i2c_pad[bus]);
62 }
63
soc_get_i2c_ctrlr_info(size_t * num_ctrlrs)64 const struct soc_i2c_ctrlr_info *soc_get_i2c_ctrlr_info(size_t *num_ctrlrs)
65 {
66 *num_ctrlrs = ARRAY_SIZE(i2c_ctrlr);
67 return i2c_ctrlr;
68 }
69
soc_get_i2c_bus_config(size_t * num_buses)70 const struct dw_i2c_bus_config *soc_get_i2c_bus_config(size_t *num_buses)
71 {
72 const struct soc_amd_phoenix_config *config = config_of_soc();
73
74 *num_buses = ARRAY_SIZE(config->i2c);
75 return config->i2c;
76 }
77