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         STMPE610,
  24         STMPE801,
  25         STMPE811,
  26         STMPE1601,
  27         STMPE2401,
  28         STMPE2403,
  29 };
  30
  31 /*
  32  * For registers whose locations differ on variants,  the correct address is
  33  * obtained by indexing stmpe->regs with one of the following.
  34  */
  35 enum {
  36         STMPE_IDX_CHIP_ID,
  37         STMPE_IDX_ICR_LSB,
  38         STMPE_IDX_IER_LSB,
  39         STMPE_IDX_ISR_MSB,
  40         STMPE_IDX_GPMR_LSB,
  41         STMPE_IDX_GPSR_LSB,
  42         STMPE_IDX_GPCR_LSB,
  43         STMPE_IDX_GPDR_LSB,
  44         STMPE_IDX_GPEDR_MSB,
  45         STMPE_IDX_GPRER_LSB,
  46         STMPE_IDX_GPFER_LSB,
  47         STMPE_IDX_GPAFR_U_MSB,
  48         STMPE_IDX_IEGPIOR_LSB,
  49         STMPE_IDX_ISGPIOR_MSB,
  50         STMPE_IDX_MAX,
  51 };
  52
  53
  54 struct stmpe_variant_info;
  55 struct stmpe_client_info;
  56
  57 /**
  58  * struct stmpe - STMPE MFD structure
  59  * @lock: lock protecting I/O operations
  60  * @irq_lock: IRQ bus lock
  61  * @dev: device, mostly for dev_dbg()
  62  * @client: client - i2c or spi
  63  * @ci: client specific information
  64  * @partnum: part number
  65  * @variant: the detected STMPE model number
  66  * @regs: list of addresses of registers which are at different addresses on
  67  *        different variants.  Indexed by one of STMPE_IDX_*.
  68  * @irq: irq number for stmpe
  69  * @irq_base: starting IRQ number for internal IRQs
  70  * @num_gpios: number of gpios, differs for variants
  71  * @ier: cache of IER registers for bus_lock
  72  * @oldier: cache of IER registers for bus_lock
  73  * @pdata: platform data
  74  */
  75 struct stmpe {
  76         struct mutex lock;
  77         struct mutex irq_lock;
  78         struct device *dev;
  79         void *client;
  80         struct stmpe_client_info *ci;
  81         enum stmpe_partnum partnum;
  82         struct stmpe_variant_info *variant;
  83         const u8 *regs;
  84
  85         int irq;
  86         int irq_base;
  87         int num_gpios;
  88         u8 ier[2];
  89         u8 oldier[2];
  90         struct stmpe_platform_data *pdata;
  91 };
  92
  93 extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
  94 extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
  95 extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
  96                             u8 *values);
  97 extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
  98                              const u8 *values);
  99 extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
 100 extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
 101                              enum stmpe_block block);
 102 extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
 103 extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
 104
 105 struct matrix_keymap_data;
 106
 107 /**
 108  * struct stmpe_keypad_platform_data - STMPE keypad platform data
 109  * @keymap_data: key map table and size
 110  * @debounce_ms: debounce interval, in ms.  Maximum is
 111  *               %STMPE_KEYPAD_MAX_DEBOUNCE.
 112  * @scan_count: number of key scanning cycles to confirm key data.
 113  *              Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
 114  * @no_autorepeat: disable key autorepeat
 115  */
 116 struct stmpe_keypad_platform_data {
 117         struct matrix_keymap_data *keymap_data;
 118         unsigned int debounce_ms;
 119         unsigned int scan_count;
 120         bool no_autorepeat;
 121 };
 122
 123 #define STMPE_GPIO_NOREQ_811_TOUCH      (0xf0)
 124
 125 /**
 126  * struct stmpe_gpio_platform_data - STMPE GPIO platform data
 127  * @gpio_base: first gpio number assigned.  A maximum of
 128  *             %STMPE_NR_GPIOS GPIOs will be allocated.
 129  * @norequest_mask: bitmask specifying which GPIOs should _not_ be
 130  *                  requestable due to different usage (e.g. touch, keypad)
 131  *                  STMPE_GPIO_NOREQ_* macros can be used here.
 132  * @setup: board specific setup callback.
 133  * @remove: board specific remove callback
 134  */
 135 struct stmpe_gpio_platform_data {
 136         int gpio_base;
 137         unsigned norequest_mask;
 138         void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
 139         void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
 140 };
 141
 142 /**
 143  * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
 144  * data
 145  * @sample_time: ADC converstion time in number of clock.
 146  * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
 147  * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
 148  * recommended is 4.
 149  * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
 150  * @ref_sel: ADC reference source
 151  * (0 -> internal reference, 1 -> external reference)
 152  * @adc_freq: ADC Clock speed
 153  * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
 154  * @ave_ctrl: Sample average control
 155  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
 156  * @touch_det_delay: Touch detect interrupt delay
 157  * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
 158  * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
 159  * recommended is 3
 160  * @settling: Panel driver settling time
 161  * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
 162  * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
 163  * recommended is 2
 164  * @fraction_z: Length of the fractional part in z
 165  * (fraction_z ([0..7]) = Count of the fractional part)
 166  * recommended is 7
 167  * @i_drive: current limit value of the touchscreen drivers
 168  * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
 169  *
 170  * */
 171 struct stmpe_ts_platform_data {
 172        u8 sample_time;
 173        u8 mod_12b;
 174        u8 ref_sel;
 175        u8 adc_freq;
 176        u8 ave_ctrl;
 177        u8 touch_det_delay;
 178        u8 settling;
 179        u8 fraction_z;
 180        u8 i_drive;
 181 };
 182
 183 /**
 184  * struct stmpe_platform_data - STMPE platform data
 185  * @id: device id to distinguish between multiple STMPEs on the same board
 186  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
 187  * @irq_trigger: IRQ trigger to use for the interrupt to the host
 188  * @irq_invert_polarity: IRQ line is connected with reversed polarity
 189  * @autosleep: bool to enable/disable stmpe autosleep
 190  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
 191  * @irq_base: base IRQ number.  %STMPE_NR_IRQS irqs will be used, or
 192  *            %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
 193  * @irq_over_gpio: true if gpio is used to get irq
 194  * @irq_gpio: gpio number over which irq will be requested (significant only if
 195  *            irq_over_gpio is true)
 196  * @gpio: GPIO-specific platform data
 197  * @keypad: keypad-specific platform data
 198  * @ts: touchscreen-specific platform data
 199  */
 200 struct stmpe_platform_data {
 201         int id;
 202         unsigned int blocks;
 203         int irq_base;
 204         unsigned int irq_trigger;
 205         bool irq_invert_polarity;
 206         bool autosleep;
 207         bool irq_over_gpio;
 208         int irq_gpio;
 209         int autosleep_timeout;
 210
 211         struct stmpe_gpio_platform_data *gpio;
 212         struct stmpe_keypad_platform_data *keypad;
 213         struct stmpe_ts_platform_data *ts;
 214 };
 215
 216 #define STMPE_NR_INTERNAL_IRQS  9
 217 #define STMPE_INT_GPIO(x)       (STMPE_NR_INTERNAL_IRQS + (x))
 218
 219 #define STMPE_NR_GPIOS          24
 220 #define STMPE_NR_IRQS           STMPE_INT_GPIO(STMPE_NR_GPIOS)
 221
 222 #endif