Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <acpi/acpigen.h> |
| 4 | #include <console/console.h> |
Elyes Haouas | 5e2602a | 2023-01-14 05:46:25 +0100 | [diff] [blame] | 5 | #include <gpio.h> |
Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 6 | |
| 7 | static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num) |
| 8 | { |
| 9 | if (gpio_num >= SOC_GPIO_TOTAL_PINS) { |
Julius Werner | e966595 | 2022-01-21 17:06:20 -0800 | [diff] [blame] | 10 | printk(BIOS_WARNING, "Pin %d should be smaller than" |
Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 11 | " %d\n", gpio_num, SOC_GPIO_TOTAL_PINS); |
| 12 | return -1; |
| 13 | } |
Felix Held | 7110235 | 2021-08-04 23:47:50 +0200 | [diff] [blame] | 14 | if (SOC_GPIO_TOTAL_PINS >= AMD_GPIO_FIRST_REMOTE_GPIO_NUMBER && |
| 15 | gpio_num >= SOC_GPIO_TOTAL_PINS) { |
Julius Werner | e966595 | 2022-01-21 17:06:20 -0800 | [diff] [blame] | 16 | printk(BIOS_WARNING, "Pin %d is a remote GPIO which isn't supported" |
Felix Held | 7110235 | 2021-08-04 23:47:50 +0200 | [diff] [blame] | 17 | " yet.\n", gpio_num); |
| 18 | return -1; |
| 19 | } |
Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 20 | /* op (gpio_num) */ |
| 21 | acpigen_emit_namestring(op); |
| 22 | acpigen_write_integer(gpio_num); |
| 23 | return 0; |
| 24 | } |
| 25 | |
| 26 | static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num) |
| 27 | { |
| 28 | if (gpio_num >= SOC_GPIO_TOTAL_PINS) { |
Julius Werner | e966595 | 2022-01-21 17:06:20 -0800 | [diff] [blame] | 29 | printk(BIOS_WARNING, "Pin %d should be smaller than" |
Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 30 | " %d\n", gpio_num, SOC_GPIO_TOTAL_PINS); |
| 31 | return -1; |
| 32 | } |
Felix Held | 7110235 | 2021-08-04 23:47:50 +0200 | [diff] [blame] | 33 | if (SOC_GPIO_TOTAL_PINS >= AMD_GPIO_FIRST_REMOTE_GPIO_NUMBER && |
| 34 | gpio_num >= SOC_GPIO_TOTAL_PINS) { |
Julius Werner | e966595 | 2022-01-21 17:06:20 -0800 | [diff] [blame] | 35 | printk(BIOS_WARNING, "Pin %d is a remote GPIO which isn't supported" |
Felix Held | 7110235 | 2021-08-04 23:47:50 +0200 | [diff] [blame] | 36 | " yet.\n", gpio_num); |
| 37 | return -1; |
| 38 | } |
Eric Lai | 65b0afe | 2021-04-09 11:50:48 +0800 | [diff] [blame] | 39 | /* Store (op (gpio_num), Local0) */ |
| 40 | acpigen_write_store(); |
| 41 | acpigen_soc_gpio_op(op, gpio_num); |
| 42 | acpigen_emit_byte(LOCAL0_OP); |
| 43 | return 0; |
| 44 | } |
| 45 | |
| 46 | int acpigen_soc_read_rx_gpio(unsigned int gpio_num) |
| 47 | { |
| 48 | return acpigen_soc_get_gpio_state("\\_SB.GRXS", gpio_num); |
| 49 | } |
| 50 | |
| 51 | int acpigen_soc_get_tx_gpio(unsigned int gpio_num) |
| 52 | { |
| 53 | return acpigen_soc_get_gpio_state("\\_SB.GTXS", gpio_num); |
| 54 | } |
| 55 | |
| 56 | int acpigen_soc_set_tx_gpio(unsigned int gpio_num) |
| 57 | { |
| 58 | return acpigen_soc_gpio_op("\\_SB.STXS", gpio_num); |
| 59 | } |
| 60 | |
| 61 | int acpigen_soc_clear_tx_gpio(unsigned int gpio_num) |
| 62 | { |
| 63 | return acpigen_soc_gpio_op("\\_SB.CTXS", gpio_num); |
| 64 | } |