186 lines
5.1 KiB
C
186 lines
5.1 KiB
C
/*
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* Copyright (C) ST-Ericsson SA 2010
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*
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* License Terms: GNU General Public License, version 2
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* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
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*/
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#ifndef __LINUX_MFD_STMPE_H
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#define __LINUX_MFD_STMPE_H
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#include <linux/mutex.h>
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struct device;
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struct regulator;
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enum stmpe_block {
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STMPE_BLOCK_GPIO = 1 << 0,
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STMPE_BLOCK_KEYPAD = 1 << 1,
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STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
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STMPE_BLOCK_ADC = 1 << 3,
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STMPE_BLOCK_PWM = 1 << 4,
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STMPE_BLOCK_ROTATOR = 1 << 5,
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};
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enum stmpe_partnum {
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STMPE610,
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STMPE801,
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STMPE811,
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STMPE1601,
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STMPE1801,
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STMPE2401,
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STMPE2403,
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STMPE_NBR_PARTS
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};
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/*
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* For registers whose locations differ on variants, the correct address is
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* obtained by indexing stmpe->regs with one of the following.
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*/
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enum {
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STMPE_IDX_CHIP_ID,
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STMPE_IDX_ICR_LSB,
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STMPE_IDX_IER_LSB,
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STMPE_IDX_ISR_LSB,
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STMPE_IDX_ISR_MSB,
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STMPE_IDX_GPMR_LSB,
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STMPE_IDX_GPSR_LSB,
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STMPE_IDX_GPCR_LSB,
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STMPE_IDX_GPDR_LSB,
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STMPE_IDX_GPEDR_MSB,
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STMPE_IDX_GPRER_LSB,
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STMPE_IDX_GPFER_LSB,
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STMPE_IDX_GPPUR_LSB,
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STMPE_IDX_GPPDR_LSB,
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STMPE_IDX_GPAFR_U_MSB,
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STMPE_IDX_IEGPIOR_LSB,
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STMPE_IDX_ISGPIOR_LSB,
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STMPE_IDX_ISGPIOR_MSB,
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STMPE_IDX_MAX,
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};
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struct stmpe_variant_info;
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struct stmpe_client_info;
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/**
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* struct stmpe - STMPE MFD structure
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* @vcc: optional VCC regulator
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* @vio: optional VIO regulator
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* @lock: lock protecting I/O operations
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* @irq_lock: IRQ bus lock
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* @dev: device, mostly for dev_dbg()
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* @irq_domain: IRQ domain
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* @client: client - i2c or spi
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* @ci: client specific information
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* @partnum: part number
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* @variant: the detected STMPE model number
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* @regs: list of addresses of registers which are at different addresses on
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* different variants. Indexed by one of STMPE_IDX_*.
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* @irq: irq number for stmpe
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* @num_gpios: number of gpios, differs for variants
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* @ier: cache of IER registers for bus_lock
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* @oldier: cache of IER registers for bus_lock
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* @pdata: platform data
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*/
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struct stmpe {
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struct regulator *vcc;
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struct regulator *vio;
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struct mutex lock;
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struct mutex irq_lock;
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struct device *dev;
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struct irq_domain *domain;
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void *client;
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struct stmpe_client_info *ci;
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enum stmpe_partnum partnum;
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struct stmpe_variant_info *variant;
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const u8 *regs;
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int irq;
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int num_gpios;
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u8 ier[2];
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u8 oldier[2];
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struct stmpe_platform_data *pdata;
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};
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extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
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extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
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extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
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u8 *values);
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extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
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const u8 *values);
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extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
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extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
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enum stmpe_block block);
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extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
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extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
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#define STMPE_GPIO_NOREQ_811_TOUCH (0xf0)
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/**
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* struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
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* data
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* @sample_time: ADC converstion time in number of clock.
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* (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
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* 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
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* recommended is 4.
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* @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
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* @ref_sel: ADC reference source
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* (0 -> internal reference, 1 -> external reference)
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* @adc_freq: ADC Clock speed
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* (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
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* @ave_ctrl: Sample average control
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* (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
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* @touch_det_delay: Touch detect interrupt delay
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* (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
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* 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
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* recommended is 3
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* @settling: Panel driver settling time
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* (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
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* 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
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* recommended is 2
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* @fraction_z: Length of the fractional part in z
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* (fraction_z ([0..7]) = Count of the fractional part)
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* recommended is 7
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* @i_drive: current limit value of the touchscreen drivers
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* (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
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*
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* */
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struct stmpe_ts_platform_data {
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u8 sample_time;
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u8 mod_12b;
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u8 ref_sel;
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u8 adc_freq;
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u8 ave_ctrl;
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u8 touch_det_delay;
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u8 settling;
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u8 fraction_z;
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u8 i_drive;
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};
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/**
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* struct stmpe_platform_data - STMPE platform data
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* @id: device id to distinguish between multiple STMPEs on the same board
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* @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
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* @irq_trigger: IRQ trigger to use for the interrupt to the host
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* @autosleep: bool to enable/disable stmpe autosleep
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* @autosleep_timeout: inactivity timeout in milliseconds for autosleep
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* @irq_over_gpio: true if gpio is used to get irq
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* @irq_gpio: gpio number over which irq will be requested (significant only if
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* irq_over_gpio is true)
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* @ts: touchscreen-specific platform data
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*/
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struct stmpe_platform_data {
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int id;
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unsigned int blocks;
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unsigned int irq_trigger;
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bool autosleep;
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bool irq_over_gpio;
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int irq_gpio;
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int autosleep_timeout;
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struct stmpe_ts_platform_data *ts;
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};
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#endif
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