/* * Synaptics touchpad with I2C interface * * Copyright (C) 2009 Compulab, Ltd. * Mike Rapoport <[email protected]> * Igor Grinberg <[email protected]> * * 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/module.h> #include <linux/i2c.h> #include <linux/irq.h> #include <linux/interrupt.h> #include <linux/input.h> #include <linux/delay.h> #include <linux/workqueue.h> #include <linux/slab.h> #include <linux/pm.h> #define DRIVER_NAME … /* maximum product id is 15 characters */ #define PRODUCT_ID_LENGTH … #define REGISTER_LENGTH … /* * after soft reset, we should wait for 1 ms * before the device becomes operational */ #define SOFT_RESET_DELAY_US … /* and after hard reset, we should wait for max 500ms */ #define HARD_RESET_DELAY_MS … /* Registers by SMBus address */ #define PAGE_SEL_REG … #define DEVICE_STATUS_REG … /* Registers by RMI address */ #define DEV_CONTROL_REG … #define INTERRUPT_EN_REG … #define ERR_STAT_REG … #define INT_REQ_STAT_REG … #define DEV_COMMAND_REG … #define RMI_PROT_VER_REG … #define MANUFACT_ID_REG … #define PHYS_INT_VER_REG … #define PROD_PROPERTY_REG … #define INFO_QUERY_REG0 … #define INFO_QUERY_REG1 … #define INFO_QUERY_REG2 … #define INFO_QUERY_REG3 … #define PRODUCT_ID_REG0 … #define PRODUCT_ID_REG1 … #define PRODUCT_ID_REG2 … #define PRODUCT_ID_REG3 … #define PRODUCT_ID_REG4 … #define PRODUCT_ID_REG5 … #define PRODUCT_ID_REG6 … #define PRODUCT_ID_REG7 … #define PRODUCT_ID_REG8 … #define PRODUCT_ID_REG9 … #define PRODUCT_ID_REG10 … #define PRODUCT_ID_REG11 … #define PRODUCT_ID_REG12 … #define PRODUCT_ID_REG13 … #define PRODUCT_ID_REG14 … #define PRODUCT_ID_REG15 … #define DATA_REG0 … #define ABS_PRESSURE_REG … #define ABS_MSB_X_REG … #define ABS_LSB_X_REG … #define ABS_MSB_Y_REG … #define ABS_LSB_Y_REG … #define REL_X_REG … #define REL_Y_REG … #define DEV_QUERY_REG0 … #define DEV_QUERY_REG1 … #define DEV_QUERY_REG2 … #define DEV_QUERY_REG3 … #define DEV_QUERY_REG4 … #define DEV_QUERY_REG5 … #define DEV_QUERY_REG6 … #define DEV_QUERY_REG7 … #define DEV_QUERY_REG8 … #define GENERAL_2D_CONTROL_REG … #define SENSOR_SENSITIVITY_REG … #define SENS_MAX_POS_MSB_REG … #define SENS_MAX_POS_LSB_REG … /* Register bits */ /* Device Control Register Bits */ #define REPORT_RATE_1ST_BIT … /* Interrupt Enable Register Bits (INTERRUPT_EN_REG) */ #define F10_ABS_INT_ENA … #define F10_REL_INT_ENA … #define F20_INT_ENA … /* Interrupt Request Register Bits (INT_REQ_STAT_REG | DEVICE_STATUS_REG) */ #define F10_ABS_INT_REQ … #define F10_REL_INT_REQ … #define F20_INT_REQ … /* Device Status Register Bits (DEVICE_STATUS_REG) */ #define STAT_CONFIGURED … #define STAT_ERROR … /* Device Command Register Bits (DEV_COMMAND_REG) */ #define RESET_COMMAND … #define REZERO_COMMAND … /* Data Register 0 Bits (DATA_REG0) */ #define GESTURE … /* Device Query Registers Bits */ /* DEV_QUERY_REG3 */ #define HAS_PALM_DETECT … #define HAS_MULTI_FING … #define HAS_SCROLLER … #define HAS_2D_SCROLL … /* General 2D Control Register Bits (GENERAL_2D_CONTROL_REG) */ #define NO_DECELERATION … #define REDUCE_REPORTING … #define NO_FILTER … /* Function Masks */ /* Device Control Register Masks (DEV_CONTROL_REG) */ #define REPORT_RATE_MSK … #define SLEEP_MODE_MSK … /* Device Sleep Modes */ #define FULL_AWAKE … #define NORMAL_OP … #define LOW_PWR_OP … #define VERY_LOW_PWR_OP … #define SENS_SLEEP … #define SLEEP_MOD … #define DEEP_SLEEP … #define HIBERNATE … /* Interrupt Register Mask */ /* (INT_REQ_STAT_REG | DEVICE_STATUS_REG | INTERRUPT_EN_REG) */ #define INT_ENA_REQ_MSK … #define INT_ENA_ABS_MSK … #define INT_ENA_REL_MSK … #define INT_ENA_F20_MSK … /* Device Status Register Masks (DEVICE_STATUS_REG) */ #define CONFIGURED_MSK … #define ERROR_MSK … /* Data Register 0 Masks */ #define FINGER_WIDTH_MSK … #define GESTURE_MSK … #define SENSOR_STATUS_MSK … /* * MSB Position Register Masks * ABS_MSB_X_REG | ABS_MSB_Y_REG | SENS_MAX_POS_MSB_REG | * DEV_QUERY_REG3 | DEV_QUERY_REG5 */ #define MSB_POSITION_MSK … /* Device Query Registers Masks */ /* DEV_QUERY_REG2 */ #define NUM_EXTRA_POS_MSK … /* When in IRQ mode read the device every THREAD_IRQ_SLEEP_SECS */ #define THREAD_IRQ_SLEEP_SECS … #define THREAD_IRQ_SLEEP_MSECS … /* * When in Polling mode and no data received for NO_DATA_THRES msecs * reduce the polling rate to NO_DATA_SLEEP_MSECS */ #define NO_DATA_THRES … #define NO_DATA_SLEEP_MSECS … /* Control touchpad's No Deceleration option */ static bool no_decel = …; module_param(no_decel, bool, 0644); MODULE_PARM_DESC(…) …; /* Control touchpad's Reduced Reporting option */ static bool reduce_report; module_param(reduce_report, bool, 0644); MODULE_PARM_DESC(…) …; /* Control touchpad's No Filter option */ static bool no_filter; module_param(no_filter, bool, 0644); MODULE_PARM_DESC(…) …; /* * touchpad Attention line is Active Low and Open Drain, * therefore should be connected to pulled up line * and the irq configuration should be set to Falling Edge Trigger */ /* Control IRQ / Polling option */ static bool polling_req; module_param(polling_req, bool, 0444); MODULE_PARM_DESC(…) …; /* Control Polling Rate */ static int scan_rate = …; module_param(scan_rate, int, 0644); MODULE_PARM_DESC(…) …; /* The main device structure */ struct synaptics_i2c { … }; static inline void set_scan_rate(struct synaptics_i2c *touch, int scan_rate) { … } /* * Driver's initial design makes no race condition possible on i2c bus, * so there is no need in any locking. * Keep it in mind, while playing with the code. */ static s32 synaptics_i2c_reg_get(struct i2c_client *client, u16 reg) { … } static s32 synaptics_i2c_reg_set(struct i2c_client *client, u16 reg, u8 val) { … } static s32 synaptics_i2c_word_get(struct i2c_client *client, u16 reg) { … } static int synaptics_i2c_config(struct i2c_client *client) { … } static int synaptics_i2c_reset_config(struct i2c_client *client) { … } static int synaptics_i2c_check_error(struct i2c_client *client) { … } static bool synaptics_i2c_get_input(struct synaptics_i2c *touch) { … } static irqreturn_t synaptics_i2c_irq(int irq, void *dev_id) { … } static void synaptics_i2c_check_params(struct synaptics_i2c *touch) { … } /* Control the Device polling rate / Work Handler sleep time */ static unsigned long synaptics_i2c_adjust_delay(struct synaptics_i2c *touch, bool have_data) { … } /* Work Handler */ static void synaptics_i2c_work_handler(struct work_struct *work) { … } static int synaptics_i2c_open(struct input_dev *input) { … } static void synaptics_i2c_close(struct input_dev *input) { … } static void synaptics_i2c_set_input_params(struct synaptics_i2c *touch) { … } static struct synaptics_i2c *synaptics_i2c_touch_create(struct i2c_client *client) { … } static int synaptics_i2c_probe(struct i2c_client *client) { … } static void synaptics_i2c_remove(struct i2c_client *client) { … } static int synaptics_i2c_suspend(struct device *dev) { … } static int synaptics_i2c_resume(struct device *dev) { … } static DEFINE_SIMPLE_DEV_PM_OPS(synaptics_i2c_pm, synaptics_i2c_suspend, synaptics_i2c_resume); static const struct i2c_device_id synaptics_i2c_id_table[] = …; MODULE_DEVICE_TABLE(i2c, synaptics_i2c_id_table); #ifdef CONFIG_OF static const struct of_device_id synaptics_i2c_of_match[] = …; MODULE_DEVICE_TABLE(of, synaptics_i2c_of_match); #endif static struct i2c_driver synaptics_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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