diff options
| -rw-r--r-- | Documentation/devicetree/bindings/input/goodix,gt7375p.yaml | 65 | ||||
| -rw-r--r-- | arch/arm64/configs/defconfig | 3 | ||||
| -rw-r--r-- | drivers/hid/Makefile | 2 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/Kconfig | 47 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/Makefile | 6 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-acpi.c | 143 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-core.c | 252 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-of-goodix.c | 116 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid-of.c | 143 | ||||
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.h | 22 | ||||
| -rw-r--r-- | include/linux/platform_data/i2c-hid.h | 41 |
11 files changed, 578 insertions, 262 deletions
diff --git a/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml new file mode 100644 index 000000000000..fe1c5016f7f3 --- /dev/null +++ b/Documentation/devicetree/bindings/input/goodix,gt7375p.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/goodix,gt7375p.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Goodix GT7375P touchscreen + +maintainers: + - Douglas Anderson <dianders@chromium.org> + +description: + Supports the Goodix GT7375P touchscreen. + This touchscreen uses the i2c-hid protocol but has some non-standard + power sequencing required. + +properties: + compatible: + items: + - const: goodix,gt7375p + + reg: + enum: + - 0x5d + - 0x14 + + interrupts: + maxItems: 1 + + reset-gpios: + true + + vdd-supply: + description: The 3.3V supply to the touchscreen. + +required: + - compatible + - reg + - interrupts + - reset-gpios + - vdd-supply + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/qcom,rpmh.h> + #include <dt-bindings/gpio/gpio.h> + #include <dt-bindings/interrupt-controller/irq.h> + + i2c { + #address-cells = <1>; + #size-cells = <0>; + + ap_ts: touchscreen@5d { + compatible = "goodix,gt7375p"; + reg = <0x5d>; + + interrupt-parent = <&tlmm>; + interrupts = <9 IRQ_TYPE_LEVEL_LOW>; + + reset-gpios = <&tlmm 8 GPIO_ACTIVE_LOW>; + vdd-supply = <&pp3300_ts>; + }; + }; diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig index 838301650a79..326198305beb 100644 --- a/arch/arm64/configs/defconfig +++ b/arch/arm64/configs/defconfig @@ -749,7 +749,8 @@ CONFIG_SND_SOC_WM8904=m CONFIG_SND_SOC_WSA881X=m CONFIG_SND_SIMPLE_CARD=m CONFIG_SND_AUDIO_GRAPH_CARD=m -CONFIG_I2C_HID=m +CONFIG_I2C_HID_ACPI=m +CONFIG_I2C_HID_OF=m CONFIG_USB_CONN_GPIO=m CONFIG_USB=y CONFIG_USB_OTG=y diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile index 014d21fe7dac..a0621a4a65cd 100644 --- a/drivers/hid/Makefile +++ b/drivers/hid/Makefile @@ -138,7 +138,7 @@ obj-$(CONFIG_USB_HID) += usbhid/ obj-$(CONFIG_USB_MOUSE) += usbhid/ obj-$(CONFIG_USB_KBD) += usbhid/ -obj-$(CONFIG_I2C_HID) += i2c-hid/ +obj-$(CONFIG_I2C_HID_CORE) += i2c-hid/ obj-$(CONFIG_INTEL_ISH_HID) += intel-ish-hid/ obj-$(INTEL_ISH_FIRMWARE_DOWNLOADER) += intel-ish-hid/ diff --git a/drivers/hid/i2c-hid/Kconfig b/drivers/hid/i2c-hid/Kconfig index c4e5dfeab2bd..a16c6a69680b 100644 --- a/drivers/hid/i2c-hid/Kconfig +++ b/drivers/hid/i2c-hid/Kconfig @@ -2,18 +2,55 @@ menu "I2C HID support" depends on I2C -config I2C_HID - tristate "HID over I2C transport layer" +config I2C_HID_ACPI + tristate "HID over I2C transport layer ACPI driver" default n - depends on I2C && INPUT - select HID + depends on I2C && INPUT && ACPI + help + Say Y here if you use a keyboard, a touchpad, a touchscreen, or any + other HID based devices which is connected to your computer via I2C. + This driver supports ACPI-based systems. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-acpi. It will also build/depend on the + module i2c-hid. + +config I2C_HID_OF + tristate "HID over I2C transport layer Open Firmware driver" + default n + depends on I2C && INPUT && OF help Say Y here if you use a keyboard, a touchpad, a touchscreen, or any other HID based devices which is connected to your computer via I2C. + This driver supports Open Firmware (Device Tree)-based systems. If unsure, say N. This support is also available as a module. If so, the module - will be called i2c-hid. + will be called i2c-hid-of. It will also build/depend on the + module i2c-hid. + +config I2C_HID_OF_GOODIX + tristate "Driver for Goodix hid-i2c based devices on OF systems" + default n + depends on I2C && INPUT && OF + help + Say Y here if you want support for Goodix i2c devices that use + the i2c-hid protocol on Open Firmware (Device Tree)-based + systems. + + If unsure, say N. + + This support is also available as a module. If so, the module + will be called i2c-hid-of-goodix. It will also build/depend on + the module i2c-hid. endmenu + +config I2C_HID_CORE + tristate + default y if I2C_HID_ACPI=y || I2C_HID_OF=y || I2C_HID_OF_GOODIX=y + default m if I2C_HID_ACPI=m || I2C_HID_OF=m || I2C_HID_OF_GOODIX=m + select HID diff --git a/drivers/hid/i2c-hid/Makefile b/drivers/hid/i2c-hid/Makefile index 681b3896898e..302545a771f3 100644 --- a/drivers/hid/i2c-hid/Makefile +++ b/drivers/hid/i2c-hid/Makefile @@ -3,7 +3,11 @@ # Makefile for the I2C input drivers # -obj-$(CONFIG_I2C_HID) += i2c-hid.o +obj-$(CONFIG_I2C_HID_CORE) += i2c-hid.o i2c-hid-objs = i2c-hid-core.o i2c-hid-$(CONFIG_DMI) += i2c-hid-dmi-quirks.o + +obj-$(CONFIG_I2C_HID_ACPI) += i2c-hid-acpi.o +obj-$(CONFIG_I2C_HID_OF) += i2c-hid-of.o +obj-$(CONFIG_I2C_HID_OF_GOODIX) += i2c-hid-of-goodix.o diff --git a/drivers/hid/i2c-hid/i2c-hid-acpi.c b/drivers/hid/i2c-hid/i2c-hid-acpi.c new file mode 100644 index 000000000000..bb8c00e6be78 --- /dev/null +++ b/drivers/hid/i2c-hid/i2c-hid-acpi.c @@ -0,0 +1,143 @@ +/* + * HID over I2C ACPI Subclass + * + * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> + * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France + * Copyright (c) 2012 Red Hat, Inc + * + * This code was forked out of the core code, which was partly based on + * "USB HID support for Linux": + * + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> + * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc + * Copyright (c) 2007-2008 Oliver Neukum + * Copyright (c) 2006-2010 Jiri Kosina + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/pm.h> + +#include "i2c-hid.h" + +struct i2c_hid_acpi { + struct i2chid_ops ops; + struct i2c_client *client; +}; + +static const struct acpi_device_id i2c_hid_acpi_blacklist[] = { + /* + * The CHPN0001 ACPI device, which is used to describe the Chipone + * ICN8505 controller, has a _CID of PNP0C50 but is not HID compatible. + */ + {"CHPN0001", 0 }, + { }, +}; + +static int i2c_hid_acpi_get_descriptor(struct i2c_client *client) +{ + static guid_t i2c_hid_guid = + GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, + 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); + union acpi_object *obj; + struct acpi_device *adev; + acpi_handle handle; + u16 hid_descriptor_address; + + handle = ACPI_HANDLE(&client->dev); + if (!handle || acpi_bus_get_device(handle, &adev)) { + dev_err(&client->dev, "Error could not get ACPI device\n"); + return -ENODEV; + } + + if (acpi_match_device_ids(adev, i2c_hid_acpi_blacklist) == 0) + return -ENODEV; + + obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, + ACPI_TYPE_INTEGER); + if (!obj) { + dev_err(&client->dev, "Error _DSM call to get HID descriptor address failed\n"); + return -ENODEV; + } + + hid_descriptor_address = obj->integer.value; + ACPI_FREE(obj); + + return hid_descriptor_address; +} + +static void i2c_hid_acpi_shutdown_tail(struct i2chid_ops *ops) +{ + struct i2c_hid_acpi *ihid_acpi = + container_of(ops, struct i2c_hid_acpi, ops); + struct device *dev = &ihid_acpi->client->dev; + acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D3_COLD); +} + +static int i2c_hid_acpi_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id) +{ + struct device *dev = &client->dev; + struct i2c_hid_acpi *ihid_acpi; + struct acpi_device *adev; + u16 hid_descriptor_address; + int ret; + + ihid_acpi = devm_kzalloc(&client->dev, sizeof(*ihid_acpi), GFP_KERNEL); + if (!ihid_acpi) + return -ENOMEM; + + ihid_acpi->client = client; + ihid_acpi->ops.shutdown_tail = i2c_hid_acpi_shutdown_tail; + + ret = i2c_hid_acpi_get_descriptor(client); + if (ret < 0) + return ret; + hid_descriptor_address = ret; + + adev = ACPI_COMPANION(dev); + if (adev) + acpi_device_fix_up_power(adev); + + if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { + device_set_wakeup_capable(dev, true); + device_set_wakeup_enable(dev, false); + } + + return i2c_hid_core_probe(client, &ihid_acpi->ops, + hid_descriptor_address); +} + +static const struct acpi_device_id i2c_hid_acpi_match[] = { + {"ACPI0C50", 0 }, + {"PNP0C50", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match); + +static struct i2c_driver i2c_hid_acpi_driver = { + .driver = { + .name = "i2c_hid_acpi", + .pm = &i2c_hid_core_pm, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .acpi_match_table = ACPI_PTR(i2c_hid_acpi_match), + }, + + .probe = i2c_hid_acpi_probe, + .remove = i2c_hid_core_remove, + .shutdown = i2c_hid_core_shutdown, +}; + +module_i2c_driver(i2c_hid_acpi_driver); + +MODULE_DESCRIPTION("HID over I2C ACPI driver"); +MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c index c586acf2fc0b..9993133989a5 100644 --- a/drivers/hid/i2c-hid/i2c-hid-core.c +++ b/drivers/hid/i2c-hid/i2c-hid-core.c @@ -35,11 +35,6 @@ #include <linux/kernel.h> #include <linux/hid.h> #include <linux/mutex.h> -#include <linux/acpi.h> -#include <linux/of.h> -#include <linux/regulator/consumer.h> - -#include <linux/platform_data/i2c-hid.h> #include "../hid-ids.h" #include "i2c-hid.h" @@ -156,10 +151,10 @@ struct i2c_hid { wait_queue_head_t wait; /* For waiting the interrupt */ - struct i2c_hid_platform_data pdata; - bool irq_wake_enabled; struct mutex reset_lock; + + struct i2chid_ops *ops; }; static const struct i2c_hid_quirks { @@ -886,144 +881,36 @@ static int i2c_hid_fetch_hid_descriptor(struct i2c_hid *ihid) return 0; } -#ifdef CONFIG_ACPI -static const struct acpi_device_id i2c_hid_acpi_blacklist[] = { - /* - * The CHPN0001 ACPI device, which is used to describe the Chipone - * ICN8505 controller, has a _CID of PNP0C50 but is not HID compatible. - */ - {"CHPN0001", 0 }, - { }, -}; - -static int i2c_hid_acpi_pdata(struct i2c_client *client, - struct i2c_hid_platform_data *pdata) -{ - static guid_t i2c_hid_guid = - GUID_INIT(0x3CDFF6F7, 0x4267, 0x4555, - 0xAD, 0x05, 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE); - union acpi_object *obj; - struct acpi_device *adev; - acpi_handle handle; - - handle = ACPI_HANDLE(&client->dev); - if (!handle || acpi_bus_get_device(handle, &adev)) { - dev_err(&client->dev, "Error could not get ACPI device\n"); - return -ENODEV; - } - - if (acpi_match_device_ids(adev, i2c_hid_acpi_blacklist) == 0) - return -ENODEV; - - obj = acpi_evaluate_dsm_typed(handle, &i2c_hid_guid, 1, 1, NULL, - ACPI_TYPE_INTEGER); - if (!obj) { - dev_err(&client->dev, "Error _DSM call to get HID descriptor address failed\n"); - return -ENODEV; - } - - pdata->hid_descriptor_address = obj->integer.value; - ACPI_FREE(obj); - - return 0; -} - -static void i2c_hid_acpi_fix_up_power(struct device *dev) -{ - struct acpi_device *adev; - - adev = ACPI_COMPANION(dev); - if (adev) - acpi_device_fix_up_power(adev); -} - -static void i2c_hid_acpi_enable_wakeup(struct device *dev) -{ - if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) { - device_set_wakeup_capable(dev, true); - device_set_wakeup_enable(dev, false); - } -} - -static void i2c_hid_acpi_shutdown(struct device *dev) +static int i2c_hid_core_power_up(struct i2c_hid *ihid) { - acpi_device_set_power(ACPI_COMPANION(dev), ACPI_STATE_D3_COLD); -} + if (!ihid->ops->power_up) + return 0; -static const struct acpi_device_id i2c_hid_acpi_match[] = { - {"ACPI0C50", 0 }, - {"PNP0C50", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(acpi, i2c_hid_acpi_match); -#else -static inline int i2c_hid_acpi_pdata(struct i2c_client *client, - struct i2c_hid_platform_data *pdata) -{ - return -ENODEV; + return ihid->ops->power_up(ihid->ops); } -static inline void i2c_hid_acpi_fix_up_power(struct device *dev) {} - -static inline void i2c_hid_acpi_enable_wakeup(struct device *dev) {} - -static inline void i2c_hid_acpi_shutdown(struct device *dev) {} -#endif - -#ifdef CONFIG_OF -static int i2c_hid_of_probe(struct i2c_client *client, - struct i2c_hid_platform_data *pdata) +static void i2c_hid_core_power_down(struct i2c_hid *ihid) { - struct device *dev = &client->dev; - u32 val; - int ret; - - ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val); - if (ret) { - dev_err(&client->dev, "HID register address not provided\n"); - return -ENODEV; - } - if (val >> 16) { - dev_err(&client->dev, "Bad HID register address: 0x%08x\n", - val); - return -EINVAL; - } - pdata->hid_descriptor_address = val; - - return 0; -} + if (!ihid->ops->power_down) + return; -static const struct of_device_id i2c_hid_of_match[] = { - { .compatible = "hid-over-i2c" }, - {}, -}; -MODULE_DEVICE_TABLE(of, i2c_hid_of_match); -#else -static inline int i2c_hid_of_probe(struct i2c_client *client, - struct i2c_hid_platform_data *pdata) -{ - return -ENODEV; + ihid->ops->power_down(ihid->ops); } -#endif -static void i2c_hid_fwnode_probe(struct i2c_client *client, - struct i2c_hid_platform_data *pdata) +static void i2c_hid_core_shutdown_tail(struct i2c_hid *ihid) { - u32 val; + if (!ihid->ops->shutdown_tail) + return; - if (!device_property_read_u32(&client->dev, "post-power-on-delay-ms", - &val)) - pdata->post_power_delay_ms = val; + ihid->ops->shutdown_tail(ihid->ops); } -static int i2c_hid_probe(struct i2c_client *client, - const struct i2c_device_id *dev_id) +int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops, + u16 hid_descriptor_address) { int ret; struct i2c_hid *ihid; struct hid_device *hid; - __u16 hidRegister; - struct i2c_hid_platform_data *platform_data = client->dev.platform_data; dbg_hid("HID probe called for i2c 0x%02x\n", client->addr); @@ -1044,44 +931,17 @@ static int i2c_hid_probe(struct i2c_client *client, if (!ihid) return -ENOMEM; - if (client->dev.of_node) { - ret = i2c_hid_of_probe(client, &ihid->pdata); - if (ret) - return ret; - } else if (!platform_data) { - ret = i2c_hid_acpi_pdata(client, &ihid->pdata); - if (ret) - return ret; - } else { - ihid->pdata = *platform_data; - } - - /* Parse platform agnostic common properties from ACPI / device tree */ - i2c_hid_fwnode_probe(client, &ihid->pdata); - - ihid->pdata.supplies[0].supply = "vdd"; - ihid->pdata.supplies[1].supply = "vddl"; + ihid->ops = ops; - ret = devm_regulator_bulk_get(&client->dev, - ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + ret = i2c_hid_core_power_up(ihid); if (ret) return ret; - ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); - if (ret < 0) - return ret; - - if (ihid->pdata.post_power_delay_ms) - msleep(ihid->pdata.post_power_delay_ms); - i2c_set_clientdata(client, ihid); ihid->client = client; - hidRegister = ihid->pdata.hid_descriptor_address; - ihid->wHIDDescRegister = cpu_to_le16(hidRegister); + ihid->wHIDDescRegister = cpu_to_le16(hid_descriptor_address); init_waitqueue_head(&ihid->wait); mutex_init(&ihid->reset_lock); @@ -1091,11 +951,7 @@ static int i2c_hid_probe(struct i2c_client *client, * real computation later. */ ret = i2c_hid_alloc_buffers(ihid, HID_MIN_BUFFER_SIZE); if (ret < 0) - goto err_regulator; - - i2c_hid_acpi_fix_up_power(&client->dev); - - i2c_hid_acpi_enable_wakeup(&client->dev); + goto err_powered; device_enable_async_suspend(&client->dev); @@ -1104,19 +960,19 @@ static int i2c_hid_probe(struct i2c_client *client, if (ret < 0) { dev_dbg(&client->dev, "nothing at this address: %d\n", ret); ret = -ENXIO; - goto err_regulator; + goto err_powered; } ret = i2c_hid_fetch_hid_descriptor(ihid); if (ret < 0) { dev_err(&client->dev, "Failed to fetch the HID Descriptor\n"); - goto err_regulator; + goto err_powered; } ret = i2c_hid_init_irq(client); if (ret < 0) - goto err_regulator; + goto err_powered; hid = hid_allocate_device(); if (IS_ERR(hid)) { @@ -1155,14 +1011,14 @@ err_mem_free: err_irq: free_irq(client->irq, ihid); -err_regulator: - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); +err_powered: + i2c_hid_core_power_down(ihid); i2c_hid_free_buffers(ihid); return ret; } +EXPORT_SYMBOL_GPL(i2c_hid_core_probe); -static int i2c_hid_remove(struct i2c_client *client) +int i2c_hid_core_remove(struct i2c_client *client) { struct i2c_hid *ihid = i2c_get_clientdata(client); struct hid_device *hid; @@ -1175,24 +1031,25 @@ static int i2c_hid_remove(struct i2c_client *client) if (ihid->bufsize) i2c_hid_free_buffers(ihid); - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + i2c_hid_core_power_down(ihid); return 0; } +EXPORT_SYMBOL_GPL(i2c_hid_core_remove); -static void i2c_hid_shutdown(struct i2c_client *client) +void i2c_hid_core_shutdown(struct i2c_client *client) { struct i2c_hid *ihid = i2c_get_clientdata(client); i2c_hid_set_power(client, I2C_HID_PWR_SLEEP); free_irq(client->irq, ihid); - i2c_hid_acpi_shutdown(&client->dev); + i2c_hid_core_shutdown_tail(ihid); } +EXPORT_SYMBOL_GPL(i2c_hid_core_shutdown); #ifdef CONFIG_PM_SLEEP -static int i2c_hid_suspend(struct device *dev) +static int i2c_hid_core_suspend(struct device *dev) { struct i2c_client *client = to_i2c_client(dev); struct i2c_hid *ihid = i2c_get_clientdata(client); @@ -1219,14 +1076,13 @@ static int i2c_hid_suspend(struct device *dev) hid_warn(hid, "Failed to enable irq wake: %d\n", wake_status); } else { - regulator_bulk_disable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); + i2c_hid_core_power_down(ihid); } return 0; } -static int i2c_hid_resume(struct device *dev) +static int i2c_hid_core_resume(struct device *dev) { int ret; struct i2c_client *client = to_i2c_client(dev); @@ -1235,13 +1091,7 @@ static int i2c_hid_resume(struct device *dev) int wake_status; if (!device_may_wakeup(&client->dev)) { - ret = regulator_bulk_enable(ARRAY_SIZE(ihid->pdata.supplies), - ihid->pdata.supplies); - if (ret) - hid_warn(hid, "Failed to enable supplies: %d\n", ret); - - if (ihid->pdata.post_power_delay_ms) - msleep(ihid->pdata.post_power_delay_ms); + i2c_hid_core_power_up(ihid); } else if (ihid->irq_wake_enabled) { wake_status = disable_irq_wake(client->irq); if (!wake_status) @@ -1278,34 +1128,10 @@ static int i2c_hid_resume(struct device *dev) } #endif -static const struct dev_pm_ops i2c_hid_pm = { - SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_suspend, i2c_hid_resume) +const struct dev_pm_ops i2c_hid_core_pm = { + SET_SYSTEM_SLEEP_PM_OPS(i2c_hid_core_suspend, i2c_hid_core_resume) }; - -static const struct i2c_device_id i2c_hid_id_table[] = { - { "hid", 0 }, - { "hid-over-i2c", 0 }, - { }, -}; -MODULE_DEVICE_TABLE(i2c, i2c_hid_id_table); - - -static struct i2c_driver i2c_hid_driver = { - .driver = { - .name = "i2c_hid", - .pm = &i2c_hid_pm, - .probe_type = PROBE_PREFER_ASYNCHRONOUS, - .acpi_match_table = ACPI_PTR(i2c_hid_acpi_match), - .of_match_table = of_match_ptr(i2c_hid_of_match), - }, - - .probe = i2c_hid_probe, - .remove = i2c_hid_remove, - .shutdown = i2c_hid_shutdown, - .id_table = i2c_hid_id_table, -}; - -module_i2c_driver(i2c_hid_driver); +EXPORT_SYMBOL_GPL(i2c_hid_core_pm); MODULE_DESCRIPTION("HID over I2C core driver"); MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); diff --git a/drivers/hid/i2c-hid/i2c-hid-of-goodix.c b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c new file mode 100644 index 000000000000..ee0225982a82 --- /dev/null +++ b/drivers/hid/i2c-hid/i2c-hid-of-goodix.c @@ -0,0 +1,116 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Driver for Goodix touchscreens that use the i2c-hid protocol. + * + * Copyright 2020 Google LLC + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/gpio/consumer.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/pm.h> +#include <linux/regulator/consumer.h> + +#include "i2c-hid.h" + +struct goodix_i2c_hid_timing_data { + unsigned int post_gpio_reset_delay_ms; + unsigned int post_power_delay_ms; +}; + +struct i2c_hid_of_goodix { + struct i2chid_ops ops; + + struct regulator *vdd; + struct gpio_desc *reset_gpio; + const struct goodix_i2c_hid_timing_data *timings; +}; + +static int goodix_i2c_hid_power_up(struct i2chid_ops *ops) +{ + struct i2c_hid_of_goodix *ihid_goodix = + container_of(ops, struct i2c_hid_of_goodix, ops); + int ret; + + ret = regulator_enable(ihid_goodix->vdd); + if (ret) + return ret; + + if (ihid_goodix->timings->post_power_delay_ms) + msleep(ihid_goodix->timings->post_power_delay_ms); + + gpiod_set_value_cansleep(ihid_goodix->reset_gpio, 0); + if (ihid_goodix->timings->post_gpio_reset_delay_ms) + msleep(ihid_goodix->timings->post_gpio_reset_delay_ms); + + return 0; +} + +static void goodix_i2c_hid_power_down(struct i2chid_ops *ops) +{ + struct i2c_hid_of_goodix *ihid_goodix = + container_of(ops, struct i2c_hid_of_goodix, ops); + + gpiod_set_value_cansleep(ihid_goodix->reset_gpio, 1); + regulator_disable(ihid_goodix->vdd); +} + +static int i2c_hid_of_goodix_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct i2c_hid_of_goodix *ihid_goodix; + + ihid_goodix = devm_kzalloc(&client->dev, sizeof(*ihid_goodix), + GFP_KERNEL); + if (!ihid_goodix) + return -ENOMEM; + + ihid_goodix->ops.power_up = goodix_i2c_hid_power_up; + ihid_goodix->ops.power_down = goodix_i2c_hid_power_down; + + /* Start out with reset asserted */ + ihid_goodix->reset_gpio = + devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(ihid_goodix->reset_gpio)) + return PTR_ERR(ihid_goodix->reset_gpio); + + ihid_goodix->vdd = devm_regulator_get(&client->dev, "vdd"); + if (IS_ERR(ihid_goodix->vdd)) + return PTR_ERR(ihid_goodix->vdd); + + ihid_goodix->timings = device_get_match_data(&client->dev); + + return i2c_hid_core_probe(client, &ihid_goodix->ops, 0x0001); +} + +static const struct goodix_i2c_hid_timing_data goodix_gt7375p_timing_data = { + .post_power_delay_ms = 10, + .post_gpio_reset_delay_ms = 180, +}; + +static const struct of_device_id goodix_i2c_hid_of_match[] = { + { .compatible = "goodix,gt7375p", .data = &goodix_gt7375p_timing_data }, + { } +}; +MODULE_DEVICE_TABLE(of, goodix_i2c_hid_of_match); + +static struct i2c_driver goodix_i2c_hid_ts_driver = { + .driver = { + .name = "i2c_hid_of_goodix", + .pm = &i2c_hid_core_pm, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = of_match_ptr(goodix_i2c_hid_of_match), + }, + .probe = i2c_hid_of_goodix_probe, + .remove = i2c_hid_core_remove, + .shutdown = i2c_hid_core_shutdown, +}; +module_i2c_driver(goodix_i2c_hid_ts_driver); + +MODULE_AUTHOR("Douglas Anderson <dianders@chromium.org>"); +MODULE_DESCRIPTION("Goodix i2c-hid touchscreen driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/hid/i2c-hid/i2c-hid-of.c b/drivers/hid/i2c-hid/i2c-hid-of.c new file mode 100644 index 000000000000..4bf7cea92637 --- /dev/null +++ b/drivers/hid/i2c-hid/i2c-hid-of.c @@ -0,0 +1,143 @@ +/* + * HID over I2C Open Firmware Subclass + * + * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> + * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France + * Copyright (c) 2012 Red Hat, Inc + * + * This code was forked out of the core code, which was partly based on + * "USB HID support for Linux": + * + * Copyright (c) 1999 Andreas Gal + * Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz> + * Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc + * Copyright (c) 2007-2008 Oliver Neukum + * Copyright (c) 2006-2010 Jiri Kosina + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file COPYING in the main directory of this archive for + * more details. + */ + +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/i2c.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/pm.h> +#include <linux/regulator/consumer.h> + +#include "i2c-hid.h" + +struct i2c_hid_of { + struct i2chid_ops ops; + + struct i2c_client *client; + struct regulator_bulk_data supplies[2]; + int post_power_delay_ms; +}; + +static int i2c_hid_of_power_up(struct i2chid_ops *ops) +{ + struct i2c_hid_of *ihid_of = container_of(ops, struct i2c_hid_of, ops); + struct device *dev = &ihid_of->client->dev; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ihid_of->supplies), + ihid_of->supplies); + if (ret) { + dev_warn(dev, "Failed to enable supplies: %d\n", ret); + return ret; + } + + if (ihid_of->post_power_delay_ms) + msleep(ihid_of->post_power_delay_ms); + + return 0; +} + +static void i2c_hid_of_power_down(struct i2chid_ops *ops) +{ + struct i2c_hid_of *ihid_of = container_of(ops, struct i2c_hid_of, ops); + + regulator_bulk_disable(ARRAY_SIZE(ihid_of->supplies), + ihid_of->supplies); +} + +static int i2c_hid_of_probe(struct i2c_client *client, + const struct i2c_device_id *dev_id) +{ + struct device *dev = &client->dev; + struct i2c_hid_of *ihid_of; + u16 hid_descriptor_address; + int ret; + u32 val; + + ihid_of = devm_kzalloc(&client->dev, sizeof(*ihid_of), GFP_KERNEL); + if (!ihid_of) + return -ENOMEM; + + ihid_of->ops.power_up = i2c_hid_of_power_up; + ihid_of->ops.power_down = i2c_hid_of_power_down; + + ret = of_property_read_u32(dev->of_node, "hid-descr-addr", &val); + if (ret) { + dev_err(&client->dev, "HID register address not provided\n"); + return -ENODEV; + } + if (val >> 16) { + dev_err(&client->dev, "Bad HID register address: 0x%08x\n", + val); + return -EINVAL; + } + hid_descriptor_address = val; + + if (!device_property_read_u32(&client->dev, "post-power-on-delay-ms", + &val)) + ihid_of->post_power_delay_ms = val; + + ihid_of->supplies[0].supply = "vdd"; + ihid_of->supplies[1].supply = "vddl"; + ret = devm_regulator_bulk_get(&client->dev, + ARRAY_SIZE(ihid_of->supplies), + ihid_of->supplies); + if (ret) + return ret; + + return i2c_hid_core_probe(client, &ihid_of->ops, + hid_descriptor_address); +} + +static const struct of_device_id i2c_hid_of_match[] = { + { .compatible = "hid-over-i2c" }, + {}, +}; +MODULE_DEVICE_TABLE(of, i2c_hid_of_match); + +static const struct i2c_device_id i2c_hid_of_id_table[] = { + { "hid", 0 }, + { "hid-over-i2c", 0 }, + { }, +}; +MODULE_DEVICE_TABLE(i2c, i2c_hid_of_id_table); + +static struct i2c_driver i2c_hid_of_driver = { + .driver = { + .name = "i2c_hid_of", + .pm = &i2c_hid_core_pm, + .probe_type = PROBE_PREFER_ASYNCHRONOUS, + .of_match_table = of_match_ptr(i2c_hid_of_match), + }, + + .probe = i2c_hid_of_probe, + .remove = i2c_hid_core_remove, + .shutdown = i2c_hid_core_shutdown, + .id_table = i2c_hid_of_id_table, +}; + +module_i2c_driver(i2c_hid_of_driver); + +MODULE_DESCRIPTION("HID over I2C OF driver"); +MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); +MODULE_LICENSE("GPL"); diff --git a/drivers/hid/i2c-hid/i2c-hid.h b/drivers/hid/i2c-hid/i2c-hid.h index a8c19aef5824..05a7827d211a 100644 --- a/drivers/hid/i2c-hid/i2c-hid.h +++ b/drivers/hid/i2c-hid/i2c-hid.h @@ -3,6 +3,7 @@ #ifndef I2C_HID_H #define I2C_HID_H +#include <linux/i2c.h> #ifdef CONFIG_DMI struct i2c_hid_desc *i2c_hid_get_dmi_i2c_hid_desc_override(uint8_t *i2c_name); @@ -17,4 +18,25 @@ static inline char *i2c_hid_get_dmi_hid_report_desc_override(uint8_t *i2c_name, { return NULL; } #endif +/** + * struct i2chid_ops - Ops provided to the core. + * + * @power_up: do sequencing to power up the device. + * @power_down: do sequencing to power down the device. + * @shutdown_tail: called at the end of shutdown. + */ +struct i2chid_ops { + int (*power_up)(struct i2chid_ops *ops); + void (*power_down)(struct i2chid_ops *ops); + void (*shutdown_tail)(struct i2chid_ops *ops); +}; + +int i2c_hid_core_probe(struct i2c_client *client, struct i2chid_ops *ops, + u16 hid_descriptor_address); +int i2c_hid_core_remove(struct i2c_client *client); + +void i2c_hid_core_shutdown(struct i2c_client *client); + +extern const struct dev_pm_ops i2c_hid_core_pm; + #endif diff --git a/include/linux/platform_data/i2c-hid.h b/include/linux/platform_data/i2c-hid.h deleted file mode 100644 index c628bb5e1061..000000000000 --- a/include/linux/platform_data/i2c-hid.h +++ /dev/null @@ -1,41 +0,0 @@ -/* - * HID over I2C protocol implementation - * - * Copyright (c) 2012 Benjamin Tissoires <benjamin.tissoires@gmail.com> - * Copyright (c) 2012 Ecole Nationale de l'Aviation Civile, France - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file COPYING in the main directory of this archive for - * more details. - */ - -#ifndef __LINUX_I2C_HID_H -#define __LINUX_I2C_HID_H - -#include <linux/regulator/consumer.h> -#include <linux/types.h> - -/** - * struct i2chid_platform_data - used by hid over i2c implementation. - * @hid_descriptor_address: i2c register where the HID descriptor is stored. - * @supplies: regulators for powering on the device. - * @post_power_delay_ms: delay after powering on before device is usable. - * - * Note that it is the responsibility of the platform driver (or the acpi 5.0 - * driver, or the flattened device tree) to setup the irq related to the gpio in - * the struct i2c_board_info. - * The platform driver should also setup the gpio according to the device: - * - * A typical example is the following: - * irq = gpio_to_irq(intr_gpio); - * hkdk4412_i2c_devs5[0].irq = irq; // store the irq in i2c_board_info - * gpio_request(intr_gpio, "elan-irq"); - * s3c_gpio_setpull(intr_gpio, S3C_GPIO_PULL_UP); - */ -struct i2c_hid_platform_data { - u16 hid_descriptor_address; - struct regulator_bulk_data supplies[2]; - int post_power_delay_ms; -}; - -#endif /* __LINUX_I2C_HID_H */ |