1 /* SPDX-License-Identifier: GPL-2.0-or-later
2  *
3  * DMI based code to deal with broken DSDTs on X86 tablets which ship with
4  * Android as (part of) the factory image. The factory kernels shipped on these
5  * devices typically have a bunch of things hardcoded, rather than specified
6  * in their DSDT.
7  *
8  * Copyright (C) 2021-2023 Hans de Goede <hdegoede@redhat.com>
9  */
10 #ifndef __PDX86_X86_ANDROID_TABLETS_H
11 #define __PDX86_X86_ANDROID_TABLETS_H
12 
13 #include <linux/gpio_keys.h>
14 #include <linux/i2c.h>
15 #include <linux/irqdomain_defs.h>
16 
17 struct gpio_desc;
18 struct gpiod_lookup_table;
19 struct platform_device_info;
20 struct software_node;
21 
22 /*
23  * Helpers to get Linux IRQ numbers given a description of the IRQ source
24  * (either IOAPIC index, or GPIO chip name + pin-number).
25  */
26 enum x86_acpi_irq_type {
27 	X86_ACPI_IRQ_TYPE_NONE,
28 	X86_ACPI_IRQ_TYPE_APIC,
29 	X86_ACPI_IRQ_TYPE_GPIOINT,
30 	X86_ACPI_IRQ_TYPE_PMIC,
31 };
32 
33 struct x86_acpi_irq_data {
34 	char *chip;   /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */
35 	enum x86_acpi_irq_type type;
36 	enum irq_domain_bus_token domain;
37 	int index;
38 	int trigger;  /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */
39 	int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */
40 };
41 
42 /* Structs to describe devices to instantiate */
43 struct x86_i2c_client_info {
44 	struct i2c_board_info board_info;
45 	char *adapter_path;
46 	struct x86_acpi_irq_data irq_data;
47 };
48 
49 struct x86_serdev_info {
50 	const char *ctrl_hid;
51 	const char *ctrl_uid;
52 	const char *ctrl_devname;
53 	/*
54 	 * ATM the serdev core only supports of or ACPI matching; and sofar all
55 	 * Android x86 tablets DSDTs have usable serdev nodes, but sometimes
56 	 * under the wrong controller. So we just tie the existing serdev ACPI
57 	 * node to the right controller.
58 	 */
59 	const char *serdev_hid;
60 };
61 
62 struct x86_gpio_button {
63 	struct gpio_keys_button button;
64 	const char *chip;
65 	int pin;
66 };
67 
68 struct x86_dev_info {
69 	char *invalid_aei_gpiochip;
70 	const char * const *modules;
71 	const struct software_node *bat_swnode;
72 	struct gpiod_lookup_table * const *gpiod_lookup_tables;
73 	const struct x86_i2c_client_info *i2c_client_info;
74 	const struct platform_device_info *pdev_info;
75 	const struct x86_serdev_info *serdev_info;
76 	struct x86_gpio_button *gpio_button;
77 	int i2c_client_count;
78 	int pdev_count;
79 	int serdev_count;
80 	int (*init)(void);
81 	void (*exit)(void);
82 };
83 
84 int x86_android_tablet_get_gpiod(const char *label, int pin, struct gpio_desc **desc);
85 int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data);
86 
87 /*
88  * Extern declarations of x86_dev_info structs so there can be a single
89  * MODULE_DEVICE_TABLE(dmi, ...), while splitting the board descriptions.
90  */
91 extern const struct x86_dev_info acer_b1_750_info;
92 extern const struct x86_dev_info advantech_mica_071_info;
93 extern const struct x86_dev_info asus_me176c_info;
94 extern const struct x86_dev_info asus_tf103c_info;
95 extern const struct x86_dev_info chuwi_hi8_info;
96 extern const struct x86_dev_info czc_p10t;
97 extern const struct x86_dev_info lenovo_yogabook_x90_info;
98 extern const struct x86_dev_info lenovo_yogabook_x91_info;
99 extern const struct x86_dev_info lenovo_yoga_tab2_830_1050_info;
100 extern const struct x86_dev_info lenovo_yt3_info;
101 extern const struct x86_dev_info medion_lifetab_s10346_info;
102 extern const struct x86_dev_info nextbook_ares8_info;
103 extern const struct x86_dev_info peaq_c1010_info;
104 extern const struct x86_dev_info whitelabel_tm800a550l_info;
105 extern const struct x86_dev_info xiaomi_mipad2_info;
106 extern const struct dmi_system_id x86_android_tablet_ids[];
107 
108 #endif
109