diff options
Diffstat (limited to 'drivers/platform/x86/x86-android-tablets/x86-android-tablets.h')
| -rw-r--r-- | drivers/platform/x86/x86-android-tablets/x86-android-tablets.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h new file mode 100644 index 000000000000..2498390958ad --- /dev/null +++ b/drivers/platform/x86/x86-android-tablets/x86-android-tablets.h @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later + * + * DMI based code to deal with broken DSDTs on X86 tablets which ship with + * Android as (part of) the factory image. The factory kernels shipped on these + * devices typically have a bunch of things hardcoded, rather than specified + * in their DSDT. + * + * Copyright (C) 2021-2023 Hans de Goede <hansg@kernel.org> + */ +#ifndef __PDX86_X86_ANDROID_TABLETS_H +#define __PDX86_X86_ANDROID_TABLETS_H + +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/irqdomain_defs.h> +#include <linux/spi/spi.h> + +struct gpio_desc; +struct platform_device_info; +struct software_node; + +/* + * Helpers to get Linux IRQ numbers given a description of the IRQ source + * (either IOAPIC index, or GPIO chip name + pin-number). + */ +enum x86_acpi_irq_type { + X86_ACPI_IRQ_TYPE_NONE, + X86_ACPI_IRQ_TYPE_APIC, + X86_ACPI_IRQ_TYPE_GPIOINT, + X86_ACPI_IRQ_TYPE_PMIC, +}; + +enum x86_gpiochip_type { + X86_GPIOCHIP_UNSPECIFIED = 0, + X86_GPIOCHIP_BAYTRAIL, + X86_GPIOCHIP_CHERRYVIEW, +}; + +struct x86_acpi_irq_data { + char *chip; /* GPIO chip label (GPIOINT) or PMIC ACPI path (PMIC) */ + enum x86_acpi_irq_type type; + enum irq_domain_bus_token domain; + int index; + int trigger; /* ACPI_EDGE_SENSITIVE / ACPI_LEVEL_SENSITIVE */ + int polarity; /* ACPI_ACTIVE_HIGH / ACPI_ACTIVE_LOW / ACPI_ACTIVE_BOTH */ + bool free_gpio; /* Release GPIO after getting IRQ (for TYPE_GPIOINT) */ + const char *con_id; +}; + +/* Structs to describe devices to instantiate */ +struct x86_i2c_client_info { + struct i2c_board_info board_info; + char *adapter_path; + struct x86_acpi_irq_data irq_data; +}; + +struct x86_spi_dev_info { + struct spi_board_info board_info; + char *ctrl_path; + struct x86_acpi_irq_data irq_data; +}; + +struct x86_serdev_info { + union { + struct { + const char *hid; + const char *uid; + } acpi; + struct { + unsigned int devfn; + } pci; + } ctrl; + const char *ctrl_devname; + /* + * ATM the serdev core only supports of or ACPI matching; and so far all + * Android x86 tablets DSDTs have usable serdev nodes, but sometimes + * under the wrong controller. So we just tie the existing serdev ACPI + * node to the right controller. + */ + const char *serdev_hid; +}; + +struct x86_dev_info { + const char * const *modules; + const struct software_node **swnode_group; + const struct x86_i2c_client_info *i2c_client_info; + const struct x86_spi_dev_info *spi_dev_info; + const struct platform_device_info *pdev_info; + const struct x86_serdev_info *serdev_info; + const struct software_node **gpio_button_swnodes; + int i2c_client_count; + int spi_dev_count; + int pdev_count; + int serdev_count; + int (*init)(struct device *dev); + void (*exit)(void); + bool use_pci; + enum x86_gpiochip_type gpiochip_type; +}; + +int x86_android_tablet_get_gpiod(const char *chip, int pin, const char *con_id, + bool active_low, enum gpiod_flags dflags, + struct gpio_desc **desc); +int x86_acpi_irq_helper_get(const struct x86_acpi_irq_data *data); + +/* Software nodes representing GPIO chips used by various tablets */ +extern const struct software_node baytrail_gpiochip_nodes[]; +extern const struct software_node cherryview_gpiochip_nodes[]; + +/* + * Extern declarations of x86_dev_info structs so there can be a single + * MODULE_DEVICE_TABLE(dmi, ...), while splitting the board descriptions. + */ +extern const struct x86_dev_info acer_a1_840_info; +extern const struct x86_dev_info acer_b1_750_info; +extern const struct x86_dev_info advantech_mica_071_info; +extern const struct x86_dev_info asus_me176c_info; +extern const struct x86_dev_info asus_tf103c_info; +extern const struct x86_dev_info chuwi_hi8_info; +extern const struct x86_dev_info cyberbook_t116_info; +extern const struct x86_dev_info czc_p10t; +extern const struct x86_dev_info lenovo_yogabook_x90_info; +extern const struct x86_dev_info lenovo_yogabook_x91_info; +extern const struct x86_dev_info lenovo_yoga_tab2_830_1050_info; +extern const struct x86_dev_info lenovo_yoga_tab2_1380_info; +extern const struct x86_dev_info lenovo_yt3_info; +extern const struct x86_dev_info medion_lifetab_s10346_info; +extern const struct x86_dev_info nextbook_ares8_info; +extern const struct x86_dev_info nextbook_ares8a_info; +extern const struct x86_dev_info peaq_c1010_info; +extern const struct x86_dev_info whitelabel_tm800a550l_info; +extern const struct x86_dev_info vexia_edu_atla10_5v_info; +extern const struct x86_dev_info vexia_edu_atla10_9v_info; +extern const struct x86_dev_info xiaomi_mipad2_info; +extern const struct dmi_system_id x86_android_tablet_ids[]; + +#endif |