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Diffstat (limited to 'include/linux/mfd/stmpe.h')
| -rw-r--r-- | include/linux/mfd/stmpe.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/include/linux/mfd/stmpe.h b/include/linux/mfd/stmpe.h new file mode 100644 index 000000000000..90faa98b577f --- /dev/null +++ b/include/linux/mfd/stmpe.h @@ -0,0 +1,197 @@ +/* + * 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 + * @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; + + 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 |