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> |
| 5 | #include <soc/gpio.h> |
| 6 | |
| 7 | static int acpigen_soc_gpio_op(const char *op, unsigned int gpio_num) |
| 8 | { |
| 9 | if (gpio_num >= SOC_GPIO_TOTAL_PINS) { |
| 10 | printk(BIOS_WARNING, "Warning: Pin %d should be smaller than" |
| 11 | " %d\n", gpio_num, SOC_GPIO_TOTAL_PINS); |
| 12 | return -1; |
| 13 | } |
| 14 | /* op (gpio_num) */ |
| 15 | acpigen_emit_namestring(op); |
| 16 | acpigen_write_integer(gpio_num); |
| 17 | return 0; |
| 18 | } |
| 19 | |
| 20 | static int acpigen_soc_get_gpio_state(const char *op, unsigned int gpio_num) |
| 21 | { |
| 22 | if (gpio_num >= SOC_GPIO_TOTAL_PINS) { |
| 23 | printk(BIOS_WARNING, "Warning: Pin %d should be smaller than" |
| 24 | " %d\n", gpio_num, SOC_GPIO_TOTAL_PINS); |
| 25 | return -1; |
| 26 | } |
| 27 | /* Store (op (gpio_num), Local0) */ |
| 28 | acpigen_write_store(); |
| 29 | acpigen_soc_gpio_op(op, gpio_num); |
| 30 | acpigen_emit_byte(LOCAL0_OP); |
| 31 | return 0; |
| 32 | } |
| 33 | |
| 34 | int acpigen_soc_read_rx_gpio(unsigned int gpio_num) |
| 35 | { |
| 36 | return acpigen_soc_get_gpio_state("\\_SB.GRXS", gpio_num); |
| 37 | } |
| 38 | |
| 39 | int acpigen_soc_get_tx_gpio(unsigned int gpio_num) |
| 40 | { |
| 41 | return acpigen_soc_get_gpio_state("\\_SB.GTXS", gpio_num); |
| 42 | } |
| 43 | |
| 44 | int acpigen_soc_set_tx_gpio(unsigned int gpio_num) |
| 45 | { |
| 46 | return acpigen_soc_gpio_op("\\_SB.STXS", gpio_num); |
| 47 | } |
| 48 | |
| 49 | int acpigen_soc_clear_tx_gpio(unsigned int gpio_num) |
| 50 | { |
| 51 | return acpigen_soc_gpio_op("\\_SB.CTXS", gpio_num); |
| 52 | } |