Angel Pons | 8a3453f | 2020-04-02 23:48:19 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 2 | |
Furquan Shaikh | 76cedd2 | 2020-05-02 10:24:23 -0700 | [diff] [blame] | 3 | #include <acpi/acpi_device.h> |
| 4 | #include <acpi/acpigen.h> |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 5 | #include <console/console.h> |
| 6 | #include <device/device.h> |
| 7 | #include <device/path.h> |
| 8 | #include <gpio.h> |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 9 | #include "chip.h" |
| 10 | |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 11 | #define MAX98357A_ACPI_NAME "MAXM" |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 12 | |
Furquan Shaikh | 7536a39 | 2020-04-24 21:59:21 -0700 | [diff] [blame] | 13 | static void max98357a_fill_ssdt(const struct device *dev) |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 14 | { |
| 15 | struct drivers_generic_max98357a_config *config = dev->chip_info; |
Duncan Laurie | 366cd21 | 2016-06-29 22:34:01 -0700 | [diff] [blame] | 16 | const char *path; |
Duncan Laurie | ffc9990 | 2016-07-02 19:56:06 -0700 | [diff] [blame] | 17 | struct acpi_dp *dp; |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 18 | |
Karthikeyan Ramasubramanian | d1c0f95 | 2020-11-02 16:26:52 -0700 | [diff] [blame] | 19 | if (!config) |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 20 | return; |
| 21 | |
Jacob Garber | bdcb4d3 | 2019-05-27 17:10:24 -0600 | [diff] [blame] | 22 | const char *scope = acpi_device_scope(dev); |
| 23 | const char *name = acpi_device_name(dev); |
| 24 | if (!scope || !name) |
| 25 | return; |
| 26 | |
Aamir Bohra | a1c82c5 | 2020-03-16 18:57:48 +0530 | [diff] [blame] | 27 | if (!config->hid) { |
| 28 | printk(BIOS_ERR, "%s: ERROR: _HID required\n", dev_path(dev)); |
| 29 | return; |
| 30 | } |
| 31 | |
Raul E Rangel | 066a9af | 2020-06-02 10:47:27 -0600 | [diff] [blame] | 32 | /* Device */ |
| 33 | acpigen_write_scope(scope); |
| 34 | acpigen_write_device(name); |
| 35 | |
Aamir Bohra | a1c82c5 | 2020-03-16 18:57:48 +0530 | [diff] [blame] | 36 | acpigen_write_name_string("_HID", config->hid); |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 37 | acpigen_write_name_integer("_UID", 0); |
| 38 | acpigen_write_name_string("_DDN", dev->chip_ops->name); |
Hung-Te Lin | b4be50c | 2018-09-10 10:55:49 +0800 | [diff] [blame] | 39 | acpigen_write_STA(acpi_device_status(dev)); |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 40 | |
| 41 | /* Resources */ |
| 42 | acpigen_write_name("_CRS"); |
| 43 | acpigen_write_resourcetemplate_header(); |
| 44 | acpi_device_write_gpio(&config->sdmode_gpio); |
| 45 | acpigen_write_resourcetemplate_footer(); |
| 46 | |
| 47 | /* _DSD for devicetree properties */ |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 48 | /* This points to the first pin in the first gpio entry in _CRS */ |
Duncan Laurie | 366cd21 | 2016-06-29 22:34:01 -0700 | [diff] [blame] | 49 | path = acpi_device_path(dev); |
Duncan Laurie | ffc9990 | 2016-07-02 19:56:06 -0700 | [diff] [blame] | 50 | dp = acpi_dp_new_table("_DSD"); |
Furquan Shaikh | 028200f | 2016-10-04 10:53:32 -0700 | [diff] [blame] | 51 | acpi_dp_add_gpio(dp, "sdmode-gpio", path, 0, 0, |
Furquan Shaikh | d2d5e44 | 2020-07-01 01:37:13 -0700 | [diff] [blame] | 52 | config->sdmode_gpio.active_low); |
Duncan Laurie | ffc9990 | 2016-07-02 19:56:06 -0700 | [diff] [blame] | 53 | acpi_dp_add_integer(dp, "sdmode-delay", config->sdmode_delay); |
| 54 | acpi_dp_write(dp); |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 55 | |
| 56 | acpigen_pop_len(); /* Device */ |
| 57 | acpigen_pop_len(); /* Scope */ |
| 58 | |
| 59 | printk(BIOS_INFO, "%s: %s\n", path, dev->chip_ops->name); |
| 60 | } |
| 61 | |
Aaron Durbin | aa090cb | 2017-09-13 16:01:52 -0600 | [diff] [blame] | 62 | static const char *max98357a_acpi_name(const struct device *dev) |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 63 | { |
| 64 | return MAX98357A_ACPI_NAME; |
| 65 | } |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 66 | |
| 67 | static struct device_operations max98357a_ops = { |
Nico Huber | 2f8ba69 | 2020-04-05 14:05:24 +0200 | [diff] [blame] | 68 | .read_resources = noop_read_resources, |
| 69 | .set_resources = noop_set_resources, |
Nico Huber | 68680dd | 2020-03-31 17:34:52 +0200 | [diff] [blame] | 70 | .acpi_name = max98357a_acpi_name, |
| 71 | .acpi_fill_ssdt = max98357a_fill_ssdt, |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 72 | }; |
| 73 | |
| 74 | static void max98357a_enable(struct device *dev) |
| 75 | { |
| 76 | struct drivers_generic_max98357a_config *config = dev->chip_info; |
| 77 | |
| 78 | /* Check if device is present by reading GPIO */ |
| 79 | if (config->device_present_gpio) { |
| 80 | int present = gpio_get(config->device_present_gpio); |
| 81 | present ^= config->device_present_gpio_invert; |
| 82 | |
| 83 | printk(BIOS_INFO, "%s is %spresent\n", |
| 84 | dev->chip_ops->name, present ? "" : "not "); |
| 85 | |
| 86 | if (!present) { |
| 87 | dev->enabled = 0; |
| 88 | return; |
| 89 | } |
| 90 | } |
| 91 | |
| 92 | dev->ops = &max98357a_ops; |
| 93 | } |
| 94 | |
| 95 | struct chip_operations drivers_generic_max98357a_ops = { |
| 96 | CHIP_NAME("Maxim Integrated 98357A Amplifier") |
Elyes HAOUAS | 2aa3b16 | 2018-11-27 17:02:10 +0100 | [diff] [blame] | 97 | .enable_dev = max98357a_enable |
Duncan Laurie | 7db1509 | 2016-05-11 11:27:47 -0700 | [diff] [blame] | 98 | }; |