Input: add Austria Microsystem AS5011 joystick driver (9d084a3d) · Commits · 戴 / test

drivers/input/joystick/Kconfig

+10 −0

Original line number	Diff line number	Diff line
		@@ -255,6 +255,16 @@ config JOYSTICK_AMIGA
		To compile this driver as a module, choose M here: the
		module will be called amijoy.

		config JOYSTICK_AS5011
		tristate "Austria Microsystem AS5011 joystick"
		depends on I2C
		help
		Say Y here if you have an AS5011 digital joystick connected to your
		system.

		To compile this driver as a module, choose M here: the
		module will be called as5011.

		config JOYSTICK_JOYDUMP
		tristate "Gameport data dumper"
		select GAMEPORT

drivers/input/joystick/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -7,6 +7,7 @@
		obj-$(CONFIG_JOYSTICK_A3D) += a3d.o
		obj-$(CONFIG_JOYSTICK_ADI) += adi.o
		obj-$(CONFIG_JOYSTICK_AMIGA) += amijoy.o
		obj-$(CONFIG_JOYSTICK_AS5011) += as5011.o
		obj-$(CONFIG_JOYSTICK_ANALOG) += analog.o
		obj-$(CONFIG_JOYSTICK_COBRA) += cobra.o
		obj-$(CONFIG_JOYSTICK_DB9) += db9.o

drivers/input/joystick/as5011.c

0 → 100644

+367 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (c) 2010, 2011 Fabien Marteau <fabien.marteau@armadeus.com>
		* Sponsored by ARMadeus Systems
		*
		* This program is free software; you can redistribute it and/or modify
		* it under the terms of the GNU General Public License as published by
		* the Free Software Foundation; either version 2 of the License, or
		* (at your option) any later version.
		*
		* This program is distributed in the hope that it will be useful,
		* but WITHOUT ANY WARRANTY; without even the implied warranty of
		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		* GNU General Public License for more details.
		*
		* You should have received a copy of the GNU General Public License
		* along with this program; if not, write to the Free Software
		* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		*
		* Driver for Austria Microsystems joysticks AS5011
		*
		* TODO:
		* - Power on the chip when open() and power down when close()
		* - Manage power mode
		*/

		#include <linux/i2c.h>
		#include <linux/interrupt.h>
		#include <linux/input.h>
		#include <linux/gpio.h>
		#include <linux/delay.h>
		#include <linux/input/as5011.h>
		#include <linux/slab.h>

		#define DRIVER_DESC "Driver for Austria Microsystems AS5011 joystick"
		#define MODULE_DEVICE_ALIAS "as5011"

		MODULE_AUTHOR("Fabien Marteau <fabien.marteau@armadeus.com>");
		MODULE_DESCRIPTION(DRIVER_DESC);
		MODULE_LICENSE("GPL");

		/* registers */
		#define AS5011_CTRL1 0x76
		#define AS5011_CTRL2 0x75
		#define AS5011_XP 0x43
		#define AS5011_XN 0x44
		#define AS5011_YP 0x53
		#define AS5011_YN 0x54
		#define AS5011_X_REG 0x41
		#define AS5011_Y_REG 0x42
		#define AS5011_X_RES_INT 0x51
		#define AS5011_Y_RES_INT 0x52

		/* CTRL1 bits */
		#define AS5011_CTRL1_LP_PULSED 0x80
		#define AS5011_CTRL1_LP_ACTIVE 0x40
		#define AS5011_CTRL1_LP_CONTINUE 0x20
		#define AS5011_CTRL1_INT_WUP_EN 0x10
		#define AS5011_CTRL1_INT_ACT_EN 0x08
		#define AS5011_CTRL1_EXT_CLK_EN 0x04
		#define AS5011_CTRL1_SOFT_RST 0x02
		#define AS5011_CTRL1_DATA_VALID 0x01

		/* CTRL2 bits */
		#define AS5011_CTRL2_EXT_SAMPLE_EN 0x08
		#define AS5011_CTRL2_RC_BIAS_ON 0x04
		#define AS5011_CTRL2_INV_SPINNING 0x02

		#define AS5011_MAX_AXIS 80
		#define AS5011_MIN_AXIS (-80)
		#define AS5011_FUZZ 8
		#define AS5011_FLAT 40

		struct as5011_device {
		struct input_dev *input_dev;
		struct i2c_client *i2c_client;
		unsigned int button_gpio;
		unsigned int button_irq;
		unsigned int axis_irq;
		};

		static int as5011_i2c_write(struct i2c_client *client,
		uint8_t aregaddr,
		uint8_t avalue)
		{
		uint8_t data[2] = { aregaddr, avalue };
		struct i2c_msg msg = {
		client->addr, I2C_M_IGNORE_NAK, 2, (uint8_t *)data
		};
		int error;

		error = i2c_transfer(client->adapter, &msg, 1);
		return error < 0 ? error : 0;
		}

		static int as5011_i2c_read(struct i2c_client *client,
		uint8_t aregaddr, signed char *value)
		{
		uint8_t data[2] = { aregaddr };
		struct i2c_msg msg_set[2] = {
		{ client->addr, I2C_M_REV_DIR_ADDR, 1, (uint8_t *)data },
		{ client->addr, I2C_M_RD \| I2C_M_NOSTART, 1, (uint8_t *)data }
		};
		int error;

		error = i2c_transfer(client->adapter, msg_set, 2);
		if (error < 0)
		return error;

		value = data[0] & 0x80 ? -1 (1 + ~data[0]) : data[0];
		return 0;
		}

		static irqreturn_t as5011_button_interrupt(int irq, void *dev_id)
		{
		struct as5011_device *as5011 = dev_id;
		int val = gpio_get_value_cansleep(as5011->button_gpio);

		input_report_key(as5011->input_dev, BTN_JOYSTICK, !val);
		input_sync(as5011->input_dev);

		return IRQ_HANDLED;
		}

		static irqreturn_t as5011_axis_interrupt(int irq, void *dev_id)
		{
		struct as5011_device *as5011 = dev_id;
		int error;
		signed char x, y;

		error = as5011_i2c_read(as5011->i2c_client, AS5011_X_RES_INT, &x);
		if (error < 0)
		goto out;

		error = as5011_i2c_read(as5011->i2c_client, AS5011_Y_RES_INT, &y);
		if (error < 0)
		goto out;

		input_report_abs(as5011->input_dev, ABS_X, x);
		input_report_abs(as5011->input_dev, ABS_Y, y);
		input_sync(as5011->input_dev);

		out:
		return IRQ_HANDLED;
		}

		static int __devinit as5011_configure_chip(struct as5011_device *as5011,
		const struct as5011_platform_data *plat_dat)
		{
		struct i2c_client *client = as5011->i2c_client;
		int error;
		signed char value;

		/* chip soft reset */
		error = as5011_i2c_write(client, AS5011_CTRL1,
		AS5011_CTRL1_SOFT_RST);
		if (error < 0) {
		dev_err(&client->dev, "Soft reset failed\n");
		return error;
		}

		mdelay(10);

		error = as5011_i2c_write(client, AS5011_CTRL1,
		AS5011_CTRL1_LP_PULSED \|
		AS5011_CTRL1_LP_ACTIVE \|
		AS5011_CTRL1_INT_ACT_EN);
		if (error < 0) {
		dev_err(&client->dev, "Power config failed\n");
		return error;
		}

		error = as5011_i2c_write(client, AS5011_CTRL2,
		AS5011_CTRL2_INV_SPINNING);
		if (error < 0) {
		dev_err(&client->dev, "Can't invert spinning\n");
		return error;
		}

		/* write threshold */
		error = as5011_i2c_write(client, AS5011_XP, plat_dat->xp);
		if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
		}

		error = as5011_i2c_write(client, AS5011_XN, plat_dat->xn);
		if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
		}

		error = as5011_i2c_write(client, AS5011_YP, plat_dat->yp);
		if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
		}

		error = as5011_i2c_write(client, AS5011_YN, plat_dat->yn);
		if (error < 0) {
		dev_err(&client->dev, "Can't write threshold\n");
		return error;
		}

		/* to free irq gpio in chip */
		error = as5011_i2c_read(client, AS5011_X_RES_INT, &value);
		if (error < 0) {
		dev_err(&client->dev, "Can't read i2c X resolution value\n");
		return error;
		}

		return 0;
		}

		static int __devinit as5011_probe(struct i2c_client *client,
		const struct i2c_device_id *id)
		{
		const struct as5011_platform_data *plat_data;
		struct as5011_device *as5011;
		struct input_dev *input_dev;
		int irq;
		int error;

		plat_data = client->dev.platform_data;
		if (!plat_data)
		return -EINVAL;

		if (!plat_data->axis_irq) {
		dev_err(&client->dev, "No axis IRQ?\n");
		return -EINVAL;
		}

		if (!i2c_check_functionality(client->adapter,
		I2C_FUNC_PROTOCOL_MANGLING)) {
		dev_err(&client->dev,
		"need i2c bus that supports protocol mangling\n");
		return -ENODEV;
		}

		as5011 = kmalloc(sizeof(struct as5011_device), GFP_KERNEL);
		input_dev = input_allocate_device();
		if (!as5011 \|\| !input_dev) {
		dev_err(&client->dev,
		"Can't allocate memory for device structure\n");
		error = -ENOMEM;
		goto err_free_mem;
		}

		as5011->i2c_client = client;
		as5011->input_dev = input_dev;
		as5011->button_gpio = plat_data->button_gpio;
		as5011->axis_irq = plat_data->axis_irq;

		input_dev->name = "Austria Microsystem as5011 joystick";
		input_dev->id.bustype = BUS_I2C;
		input_dev->dev.parent = &client->dev;

		__set_bit(EV_KEY, input_dev->evbit);
		__set_bit(EV_ABS, input_dev->evbit);
		__set_bit(BTN_JOYSTICK, input_dev->keybit);

		input_set_abs_params(input_dev, ABS_X,
		AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);
		input_set_abs_params(as5011->input_dev, ABS_Y,
		AS5011_MIN_AXIS, AS5011_MAX_AXIS, AS5011_FUZZ, AS5011_FLAT);

		error = gpio_request(as5011->button_gpio, "AS5011 button");
		if (error < 0) {
		dev_err(&client->dev, "Failed to request button gpio\n");
		goto err_free_mem;
		}

		irq = gpio_to_irq(as5011->button_gpio);
		if (irq < 0) {
		dev_err(&client->dev,
		"Failed to get irq number for button gpio\n");
		goto err_free_button_gpio;
		}

		as5011->button_irq = irq;

		error = request_threaded_irq(as5011->button_irq,
		NULL, as5011_button_interrupt,
		IRQF_TRIGGER_RISING \| IRQF_TRIGGER_FALLING,
		"as5011_button", as5011);
		if (error < 0) {
		dev_err(&client->dev,
		"Can't allocate button irq %d\n", as5011->button_irq);
		goto err_free_button_gpio;
		}

		error = as5011_configure_chip(as5011, plat_data);
		if (error)
		goto err_free_button_irq;

		error = request_threaded_irq(as5011->axis_irq, NULL,
		as5011_axis_interrupt,
		plat_data->axis_irqflags,
		"as5011_joystick", as5011);
		if (error) {
		dev_err(&client->dev,
		"Can't allocate axis irq %d\n", plat_data->axis_irq);
		goto err_free_button_irq;
		}

		error = input_register_device(as5011->input_dev);
		if (error) {
		dev_err(&client->dev, "Failed to register input device\n");
		goto err_free_axis_irq;
		}

		i2c_set_clientdata(client, as5011);

		return 0;

		err_free_axis_irq:
		free_irq(as5011->axis_irq, as5011);
		err_free_button_irq:
		free_irq(as5011->button_irq, as5011);
		err_free_button_gpio:
		gpio_free(as5011->button_gpio);
		err_free_mem:
		input_free_device(input_dev);
		kfree(as5011);

		return error;
		}

		static int __devexit as5011_remove(struct i2c_client *client)
		{
		struct as5011_device *as5011 = i2c_get_clientdata(client);

		free_irq(as5011->axis_irq, as5011);
		free_irq(as5011->button_irq, as5011);
		gpio_free(as5011->button_gpio);

		input_unregister_device(as5011->input_dev);
		kfree(as5011);

		return 0;
		}

		static const struct i2c_device_id as5011_id[] = {
		{ MODULE_DEVICE_ALIAS, 0 },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, as5011_id);

		static struct i2c_driver as5011_driver = {
		.driver = {
		.name = "as5011",
		},
		.probe = as5011_probe,
		.remove = __devexit_p(as5011_remove),
		.id_table = as5011_id,
		};

		static int __init as5011_init(void)
		{
		return i2c_add_driver(&as5011_driver);
		}
		module_init(as5011_init);

		static void __exit as5011_exit(void)
		{
		i2c_del_driver(&as5011_driver);
		}
		module_exit(as5011_exit);

include/linux/input/as5011.h

0 → 100644

+20 −0

Original line number	Diff line number	Diff line
		#ifndef _AS5011_H
		#define _AS5011_H

		/*
		* Copyright (c) 2010, 2011 Fabien Marteau <fabien.marteau@armadeus.com>
		*
		* This program is free software; you can redistribute it and/or modify it
		* under the terms of the GNU General Public License version 2 as published by
		* the Free Software Foundation.
		*/

		struct as5011_platform_data {
		unsigned int button_gpio;
		unsigned int axis_irq; /* irq number */
		unsigned long axis_irqflags;
		char xp, xn; /* threshold for x axis */
		char yp, yn; /* threshold for y axis */
		};

		#endif /* _AS5011_H */

Admin message