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/*
* Copyright (C) ST-Ericsson SA 2010
*
* License Terms: GNU General Public License, version 2
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
*/
#ifndef __LINUX_MFD_STMPE_H
#define __LINUX_MFD_STMPE_H
#include <linux/device.h>
enum stmpe_block {
STMPE_BLOCK_GPIO = 1 << 0,
STMPE_BLOCK_KEYPAD = 1 << 1,
STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
STMPE_BLOCK_ADC = 1 << 3,
STMPE_BLOCK_PWM = 1 << 4,
STMPE_BLOCK_ROTATOR = 1 << 5,
};
enum stmpe_partnum {
STMPE811,
STMPE1601,
STMPE2401,
STMPE2403,
};
/*
* For registers whose locations differ on variants, the correct address is
* obtained by indexing stmpe->regs with one of the following.
*/
enum {
STMPE_IDX_CHIP_ID,
STMPE_IDX_ICR_LSB,
STMPE_IDX_IER_LSB,
STMPE_IDX_ISR_MSB,
STMPE_IDX_GPMR_LSB,
STMPE_IDX_GPSR_LSB,
STMPE_IDX_GPCR_LSB,
STMPE_IDX_GPDR_LSB,
STMPE_IDX_GPEDR_MSB,
STMPE_IDX_GPRER_LSB,
STMPE_IDX_GPFER_LSB,
STMPE_IDX_GPAFR_U_MSB,
STMPE_IDX_IEGPIOR_LSB,
STMPE_IDX_ISGPIOR_MSB,
STMPE_IDX_MAX,
};
struct stmpe_variant_info;
/**
* struct stmpe - STMPE MFD structure
* @lock: lock protecting I/O operations
* @irq_lock: IRQ bus lock
* @dev: device, mostly for dev_dbg()
* @i2c: i2c client
* @variant: the detected STMPE model number
* @regs: list of addresses of registers which are at different addresses on
* different variants. Indexed by one of STMPE_IDX_*.
* @irq_base: starting IRQ number for internal IRQs
* @num_gpios: number of gpios, differs for variants
* @ier: cache of IER registers for bus_lock
* @oldier: cache of IER registers for bus_lock
* @pdata: platform data
*/
struct stmpe {
struct mutex lock;
struct mutex irq_lock;
struct device *dev;
struct i2c_client *i2c;
enum stmpe_partnum partnum;
struct stmpe_variant_info *variant;
const u8 *regs;
int irq_base;
int num_gpios;
u8 ier[2];
u8 oldier[2];
struct stmpe_platform_data *pdata;
};
extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
u8 *values);
extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
const u8 *values);
extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
enum stmpe_block block);
extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
struct matrix_keymap_data;
/**
* struct stmpe_keypad_platform_data - STMPE keypad platform data
* @keymap_data: key map table and size
* @debounce_ms: debounce interval, in ms. Maximum is
* %STMPE_KEYPAD_MAX_DEBOUNCE.
* @scan_count: number of key scanning cycles to confirm key data.
* Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
* @no_autorepeat: disable key autorepeat
*/
struct stmpe_keypad_platform_data {
struct matrix_keymap_data *keymap_data;
unsigned int debounce_ms;
unsigned int scan_count;
bool no_autorepeat;
};
/**
* struct stmpe_gpio_platform_data - STMPE GPIO platform data
* @gpio_base: first gpio number assigned. A maximum of
* %STMPE_NR_GPIOS GPIOs will be allocated.
*/
struct stmpe_gpio_platform_data {
int gpio_base;
void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
};
/**
* struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
* data
* @sample_time: ADC converstion time in number of clock.
* (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
* 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
* recommended is 4.
* @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
* @ref_sel: ADC reference source
* (0 -> internal reference, 1 -> external reference)
* @adc_freq: ADC Clock speed
* (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
* @ave_ctrl: Sample average control
* (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
* @touch_det_delay: Touch detect interrupt delay
* (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
* 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
* recommended is 3
* @settling: Panel driver settling time
* (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
* 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
* recommended is 2
* @fraction_z: Length of the fractional part in z
* (fraction_z ([0..7]) = Count of the fractional part)
* recommended is 7
* @i_drive: current limit value of the touchscreen drivers
* (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
*
* */
struct stmpe_ts_platform_data {
u8 sample_time;
u8 mod_12b;
u8 ref_sel;
u8 adc_freq;
u8 ave_ctrl;
u8 touch_det_delay;
u8 settling;
u8 fraction_z;
u8 i_drive;
};
/**
* struct stmpe_platform_data - STMPE platform data
* @id: device id to distinguish between multiple STMPEs on the same board
* @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
* @irq_trigger: IRQ trigger to use for the interrupt to the host
* @irq_invert_polarity: IRQ line is connected with reversed polarity
* @autosleep: bool to enable/disable stmpe autosleep
* @autosleep_timeout: inactivity timeout in milliseconds for autosleep
* @irq_base: base IRQ number. %STMPE_NR_IRQS irqs will be used, or
* %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
* @gpio: GPIO-specific platform data
* @keypad: keypad-specific platform data
* @ts: touchscreen-specific platform data
*/
struct stmpe_platform_data {
int id;
unsigned int blocks;
int irq_base;
unsigned int irq_trigger;
bool irq_invert_polarity;
bool autosleep;
int autosleep_timeout;
struct stmpe_gpio_platform_data *gpio;
struct stmpe_keypad_platform_data *keypad;
struct stmpe_ts_platform_data *ts;
};
#define STMPE_NR_INTERNAL_IRQS 9
#define STMPE_INT_GPIO(x) (STMPE_NR_INTERNAL_IRQS + (x))
#define STMPE_NR_GPIOS 24
#define STMPE_NR_IRQS STMPE_INT_GPIO(STMPE_NR_GPIOS)
#endif
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