include/linux/mfd/stmpe.h

   1 /*
   2  * Copyright (C) ST-Ericsson SA 2010
   3  *
   4  * License Terms: GNU General Public License, version 2
   5  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   6  */
   7
   8 #ifndef __LINUX_MFD_STMPE_H
   9 #define __LINUX_MFD_STMPE_H
  10
  11 #include <linux/device.h>
  12
  13 enum stmpe_block {
  14         STMPE_BLOCK_GPIO        = 1 << 0,
  15         STMPE_BLOCK_KEYPAD      = 1 << 1,
  16         STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
  17         STMPE_BLOCK_ADC         = 1 << 3,
  18         STMPE_BLOCK_PWM         = 1 << 4,
  19         STMPE_BLOCK_ROTATOR     = 1 << 5,
  20 };
  21
  22 enum stmpe_partnum {
  23         STMPE811,
  24         STMPE1601,
  25         STMPE2401,
  26         STMPE2403,
  27 };
  28
  29 /*
  30  * For registers whose locations differ on variants,  the correct address is
  31  * obtained by indexing stmpe->regs with one of the following.
  32  */
  33 enum {
  34         STMPE_IDX_CHIP_ID,
  35         STMPE_IDX_ICR_LSB,
  36         STMPE_IDX_IER_LSB,
  37         STMPE_IDX_ISR_MSB,
  38         STMPE_IDX_GPMR_LSB,
  39         STMPE_IDX_GPSR_LSB,
  40         STMPE_IDX_GPCR_LSB,
  41         STMPE_IDX_GPDR_LSB,
  42         STMPE_IDX_GPEDR_MSB,
  43         STMPE_IDX_GPRER_LSB,
  44         STMPE_IDX_GPFER_LSB,
  45         STMPE_IDX_GPAFR_U_MSB,
  46         STMPE_IDX_IEGPIOR_LSB,
  47         STMPE_IDX_ISGPIOR_MSB,
  48         STMPE_IDX_MAX,
  49 };
  50
  51
  52 struct stmpe_variant_info;
  53
  54 /**
  55  * struct stmpe - STMPE MFD structure
  56  * @lock: lock protecting I/O operations
  57  * @irq_lock: IRQ bus lock
  58  * @dev: device, mostly for dev_dbg()
  59  * @i2c: i2c client
  60  * @variant: the detected STMPE model number
  61  * @regs: list of addresses of registers which are at different addresses on
  62  *        different variants.  Indexed by one of STMPE_IDX_*.
  63  * @irq_base: starting IRQ number for internal IRQs
  64  * @num_gpios: number of gpios, differs for variants
  65  * @ier: cache of IER registers for bus_lock
  66  * @oldier: cache of IER registers for bus_lock
  67  * @pdata: platform data
  68  */
  69 struct stmpe {
  70         struct mutex lock;
  71         struct mutex irq_lock;
  72         struct device *dev;
  73         struct i2c_client *i2c;
  74         enum stmpe_partnum partnum;
  75         struct stmpe_variant_info *variant;
  76         const u8 *regs;
  77
  78         int irq_base;
  79         int num_gpios;
  80         u8 ier[2];
  81         u8 oldier[2];
  82         struct stmpe_platform_data *pdata;
  83 };
  84
  85 extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
  86 extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
  87 extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
  88                             u8 *values);
  89 extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
  90                              const u8 *values);
  91 extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
  92 extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
  93                              enum stmpe_block block);
  94 extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
  95 extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
  96
  97 struct matrix_keymap_data;
  98
  99 /**
 100  * struct stmpe_keypad_platform_data - STMPE keypad platform data
 101  * @keymap_data: key map table and size
 102  * @debounce_ms: debounce interval, in ms.  Maximum is
 103  *               %STMPE_KEYPAD_MAX_DEBOUNCE.
 104  * @scan_count: number of key scanning cycles to confirm key data.
 105  *              Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
 106  * @no_autorepeat: disable key autorepeat
 107  */
 108 struct stmpe_keypad_platform_data {
 109         struct matrix_keymap_data *keymap_data;
 110         unsigned int debounce_ms;
 111         unsigned int scan_count;
 112         bool no_autorepeat;
 113 };
 114
 115 /**
 116  * struct stmpe_gpio_platform_data - STMPE GPIO platform data
 117  * @gpio_base: first gpio number assigned.  A maximum of
 118  *             %STMPE_NR_GPIOS GPIOs will be allocated.
 119  */
 120 struct stmpe_gpio_platform_data {
 121         int gpio_base;
 122         void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
 123         void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
 124 };
 125
 126 /**
 127  * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
 128  * data
 129  * @sample_time: ADC converstion time in number of clock.
 130  * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
 131  * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
 132  * recommended is 4.
 133  * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
 134  * @ref_sel: ADC reference source
 135  * (0 -> internal reference, 1 -> external reference)
 136  * @adc_freq: ADC Clock speed
 137  * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
 138  * @ave_ctrl: Sample average control
 139  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
 140  * @touch_det_delay: Touch detect interrupt delay
 141  * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
 142  * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
 143  * recommended is 3
 144  * @settling: Panel driver settling time
 145  * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
 146  * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
 147  * recommended is 2
 148  * @fraction_z: Length of the fractional part in z
 149  * (fraction_z ([0..7]) = Count of the fractional part)
 150  * recommended is 7
 151  * @i_drive: current limit value of the touchscreen drivers
 152  * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
 153  *
 154  * */
 155 struct stmpe_ts_platform_data {
 156        u8 sample_time;
 157        u8 mod_12b;
 158        u8 ref_sel;
 159        u8 adc_freq;
 160        u8 ave_ctrl;
 161        u8 touch_det_delay;
 162        u8 settling;
 163        u8 fraction_z;
 164        u8 i_drive;
 165 };
 166
 167 /**
 168  * struct stmpe_platform_data - STMPE platform data
 169  * @id: device id to distinguish between multiple STMPEs on the same board
 170  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
 171  * @irq_trigger: IRQ trigger to use for the interrupt to the host
 172  * @irq_invert_polarity: IRQ line is connected with reversed polarity
 173  * @irq_base: base IRQ number.  %STMPE_NR_IRQS irqs will be used, or
 174  *            %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
 175  * @gpio: GPIO-specific platform data
 176  * @keypad: keypad-specific platform data
 177  * @ts: touchscreen-specific platform data
 178  */
 179 struct stmpe_platform_data {
 180         int id;
 181         unsigned int blocks;
 182         int irq_base;
 183         unsigned int irq_trigger;
 184         bool irq_invert_polarity;
 185
 186         struct stmpe_gpio_platform_data *gpio;
 187         struct stmpe_keypad_platform_data *keypad;
 188         struct stmpe_ts_platform_data *ts;
 189 };
 190
 191 #define STMPE_NR_INTERNAL_IRQS  9
 192 #define STMPE_INT_GPIO(x)       (STMPE_NR_INTERNAL_IRQS + (x))
 193
 194 #define STMPE_NR_GPIOS          24
 195 #define STMPE_NR_IRQS           STMPE_INT_GPIO(STMPE_NR_GPIOS)
 196
 197 #endif