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b8e9cf0b28
GPIOs on these controller are multi-functional. If you decided to use some of them e.g. as input channels for the ADC, you surely don't want those pins to be reassigned as simple GPIOs (which may be triggered even from userspace via 'export'). Same for the touchscreen controller pins. Since knowledge about the hardware is needed to decide which GPIOs to reserve, let this bitmask be inside platform_data and provide some defines to assist potential users. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Rabin Vincent <rabin.vincent@stericsson.com> Cc: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
208 lines
6.1 KiB
C
208 lines
6.1 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/device.h>
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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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STMPE811,
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STMPE1601,
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STMPE2401,
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STMPE2403,
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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_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_GPAFR_U_MSB,
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STMPE_IDX_IEGPIOR_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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/**
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* struct stmpe - STMPE MFD structure
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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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* @i2c: i2c client
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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_base: starting IRQ number for internal IRQs
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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 mutex lock;
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struct mutex irq_lock;
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struct device *dev;
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struct i2c_client *i2c;
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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_base;
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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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struct matrix_keymap_data;
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/**
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* struct stmpe_keypad_platform_data - STMPE keypad platform data
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* @keymap_data: key map table and size
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* @debounce_ms: debounce interval, in ms. Maximum is
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* %STMPE_KEYPAD_MAX_DEBOUNCE.
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* @scan_count: number of key scanning cycles to confirm key data.
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* Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
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* @no_autorepeat: disable key autorepeat
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*/
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struct stmpe_keypad_platform_data {
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struct matrix_keymap_data *keymap_data;
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unsigned int debounce_ms;
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unsigned int scan_count;
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bool no_autorepeat;
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};
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#define STMPE_GPIO_NOREQ_811_TOUCH (0xf0)
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/**
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* struct stmpe_gpio_platform_data - STMPE GPIO platform data
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* @gpio_base: first gpio number assigned. A maximum of
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* %STMPE_NR_GPIOS GPIOs will be allocated.
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* @norequest_mask: bitmask specifying which GPIOs should _not_ be
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* requestable due to different usage (e.g. touch, keypad)
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* STMPE_GPIO_NOREQ_* macros can be used here.
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*/
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struct stmpe_gpio_platform_data {
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int gpio_base;
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unsigned norequest_mask;
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void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
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void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
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};
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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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* @irq_invert_polarity: IRQ line is connected with reversed polarity
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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_base: base IRQ number. %STMPE_NR_IRQS irqs will be used, or
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* %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
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* @gpio: GPIO-specific platform data
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* @keypad: keypad-specific platform data
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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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int irq_base;
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unsigned int irq_trigger;
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bool irq_invert_polarity;
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bool autosleep;
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int autosleep_timeout;
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struct stmpe_gpio_platform_data *gpio;
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struct stmpe_keypad_platform_data *keypad;
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struct stmpe_ts_platform_data *ts;
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};
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#define STMPE_NR_INTERNAL_IRQS 9
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#define STMPE_INT_GPIO(x) (STMPE_NR_INTERNAL_IRQS + (x))
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#define STMPE_NR_GPIOS 24
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#define STMPE_NR_IRQS STMPE_INT_GPIO(STMPE_NR_GPIOS)
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#endif
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