1 /* SPDX-License-Identifier: GPL-2.0-only */
2
3 #include <acpi/acpi_device.h>
4 #include <acpi/acpigen.h>
5 #include <console/console.h>
6 #include <device/i2c_simple.h>
7 #include <device/device.h>
8
9 #include "chip.h"
10
11 #define CS42L42_ACPI_NAME "CRUS"
12 #define CS42L42_ACPI_HID "10134242"
13
cs42l42_fill_ssdt(const struct device * dev)14 static void cs42l42_fill_ssdt(const struct device *dev)
15 {
16 struct drivers_i2c_cs42l42_config *config = dev->chip_info;
17 const char *scope = acpi_device_scope(dev);
18 const char *path = acpi_device_path(dev);
19 struct acpi_i2c i2c = {
20 .address = dev->path.i2c.device,
21 .mode_10bit = dev->path.i2c.mode_10bit,
22 .speed = config->bus_speed ? : I2C_SPEED_FAST,
23 .resource = scope,
24 };
25 struct acpi_dp *dsd;
26 int gpio_index = 0;
27
28 if (!scope)
29 return;
30
31 /* Device */
32 acpigen_write_scope(scope);
33 acpigen_write_device(acpi_device_name(dev));
34 acpigen_write_name_string("_HID", CS42L42_ACPI_HID);
35 acpigen_write_name_integer("_UID", 0);
36 acpigen_write_name_string("_DDN", dev->chip_ops->name);
37 acpigen_write_STA(acpi_device_status(dev));
38
39 /* Resources */
40 acpigen_write_name("_CRS");
41 acpigen_write_resourcetemplate_header();
42 acpi_device_write_i2c(&i2c);
43 /* Use either Interrupt() or GpioInt() */
44 if (config->irq_gpio.pin_count)
45 acpi_device_write_gpio(&config->irq_gpio);
46 else
47 acpi_device_write_interrupt(&config->irq);
48
49 /* for cs42l42reset gpio */
50 if (config->reset_gpio.pin_count)
51 acpi_device_write_gpio(&config->reset_gpio);
52
53 acpigen_write_resourcetemplate_footer();
54
55 /* AAD Child Device Properties */
56 dsd = acpi_dp_new_table("_DSD");
57 if (config->irq_gpio.pin_count)
58 acpi_dp_add_gpio(dsd, "irq-gpios", path,
59 gpio_index++, /* Index = 0 */
60 0, /* Pin = 0 (There is a single pin in the GPIO resource). */
61 config->irq_gpio.active_low);
62 if (config->reset_gpio.pin_count)
63 acpi_dp_add_gpio(dsd, "reset-gpios", path,
64 gpio_index++, /* Index = 0 or 1 (if irq gpio is written). */
65 0, /* Pin = 0 (There is a single pin in the GPIO resource). */
66 config->reset_gpio.active_low);
67 acpi_dp_add_integer(dsd, "cirrus,ts-inv", config->ts_inv ? 1 : 0);
68 acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-rise", config->ts_dbnc_rise);
69 acpi_dp_add_integer(dsd, "cirrus,ts-dbnc-fall", config->ts_dbnc_fall);
70 acpi_dp_add_integer(dsd, "cirrus,btn-det-init-dbnce", config->btn_det_init_dbnce);
71
72 if (config->btn_det_init_dbnce > 200) {
73 printk(BIOS_ERR, "%s: Incorrect btn_det_init_dbnce(%d). Using default of 100ms\n",
74 __func__, config->btn_det_init_dbnce);
75 config->btn_det_init_dbnce = 100;
76 }
77
78 acpi_dp_add_integer(dsd, "cirrus,btn-det-event-dbnce", config->btn_det_event_dbnce);
79
80 if (config->btn_det_event_dbnce > 100) {
81 printk(BIOS_ERR, "%s: Incorrect btn_det_event_dbnce(%d). Using default of 10ms\n",
82 __func__, config->btn_det_event_dbnce);
83 config->btn_det_event_dbnce = 10;
84 }
85
86 acpi_dp_add_integer_array(dsd, "cirrus,bias-lvls", config->bias_lvls, 4);
87 acpi_dp_add_integer(dsd, "cirrus,hs-bias-ramp-rate", config->hs_bias_ramp_rate);
88 if (config->hs_bias_sense_disable)
89 acpi_dp_add_integer(dsd, "cirrus,hs-bias-sense-disable", 1);
90
91 /* Write Device Property Hierarchy */
92 acpi_dp_write(dsd);
93
94 acpigen_pop_len(); /* Device */
95 acpigen_pop_len(); /* Scope */
96
97 printk(BIOS_INFO, "%s: %s address 0%xh irq %d\n",
98 acpi_device_path(dev), dev->chip_ops->name,
99 dev->path.i2c.device, config->irq.pin);
100 }
101
cs42l42_acpi_name(const struct device * dev)102 static const char *cs42l42_acpi_name(const struct device *dev)
103 {
104 return CS42L42_ACPI_NAME;
105 }
106
107 static struct device_operations cs42l42_ops = {
108 .read_resources = noop_read_resources,
109 .set_resources = noop_set_resources,
110 .acpi_name = cs42l42_acpi_name,
111 .acpi_fill_ssdt = cs42l42_fill_ssdt,
112 };
113
cs42l42_enable(struct device * dev)114 static void cs42l42_enable(struct device *dev)
115 {
116 dev->ops = &cs42l42_ops;
117 }
118
119 struct chip_operations drivers_i2c_cs42l42_ops = {
120 .name = "Cirrus Logic CS42l42 Audio Codec",
121 .enable_dev = cs42l42_enable
122 };
123