| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Fabien Marteau | 1473 | 96.27% | 1 | 11.11% |
| Shubhrajyoti Datta | 36 | 2.35% | 1 | 11.11% |
| Wei Yongjun | 4 | 0.26% | 1 | 11.11% |
| Jingoo Han | 4 | 0.26% | 1 | 11.11% |
| Lars-Peter Clausen | 4 | 0.26% | 1 | 11.11% |
| Marcus Folkesson | 3 | 0.20% | 1 | 11.11% |
| Paul Gortmaker | 3 | 0.20% | 1 | 11.11% |
| Mark Brown | 2 | 0.13% | 1 | 11.11% |
| Axel Lin | 1 | 0.07% | 1 | 11.11% |
| Total | 1530 | 9 |
/* * 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> #include <linux/module.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 = { .addr = client->addr, .flags = I2C_M_IGNORE_NAK, .len = 2, .buf = (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] = { { .addr = client->addr, .flags = I2C_M_REV_DIR_ADDR, .len = 1, .buf = (uint8_t *)data }, { .addr = client->addr, .flags = I2C_M_RD | I2C_M_NOSTART, .len = 1, .buf = (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 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 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 = dev_get_platdata(&client->dev); 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_NOSTART | 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; input_set_capability(input_dev, EV_KEY, BTN_JOYSTICK); 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"); error = irq; 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 | IRQF_ONESHOT, "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 | IRQF_ONESHOT, "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 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 = as5011_remove, .id_table = as5011_id, }; module_i2c_driver(as5011_driver);
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