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/mutex.h>
  12
  13 struct device;
  14
  15 enum stmpe_block {
  16         STMPE_BLOCK_GPIO        = 1 << 0,
  17         STMPE_BLOCK_KEYPAD      = 1 << 1,
  18         STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
  19         STMPE_BLOCK_ADC         = 1 << 3,
  20         STMPE_BLOCK_PWM         = 1 << 4,
  21         STMPE_BLOCK_ROTATOR     = 1 << 5,
  22 };
  23
  24 enum stmpe_partnum {
  25         STMPE610,
  26         STMPE801,
  27         STMPE811,
  28         STMPE1601,
  29         STMPE2401,
  30         STMPE2403,
  31         STMPE_NBR_PARTS
  32 };
  33
  34 /*
  35  * For registers whose locations differ on variants,  the correct address is
  36  * obtained by indexing stmpe->regs with one of the following.
  37  */
  38 enum {
  39         STMPE_IDX_CHIP_ID,
  40         STMPE_IDX_ICR_LSB,
  41         STMPE_IDX_IER_LSB,
  42         STMPE_IDX_ISR_MSB,
  43         STMPE_IDX_GPMR_LSB,
  44         STMPE_IDX_GPSR_LSB,
  45         STMPE_IDX_GPCR_LSB,
  46         STMPE_IDX_GPDR_LSB,
  47         STMPE_IDX_GPEDR_MSB,
  48         STMPE_IDX_GPRER_LSB,
  49         STMPE_IDX_GPFER_LSB,
  50         STMPE_IDX_GPAFR_U_MSB,
  51         STMPE_IDX_IEGPIOR_LSB,
  52         STMPE_IDX_ISGPIOR_MSB,
  53         STMPE_IDX_MAX,
  54 };
  55
  56
  57 struct stmpe_variant_info;
  58 struct stmpe_client_info;
  59
  60 /**
  61  * struct stmpe - STMPE MFD structure
  62  * @lock: lock protecting I/O operations
  63  * @irq_lock: IRQ bus lock
  64  * @dev: device, mostly for dev_dbg()
  65  * @client: client - i2c or spi
  66  * @ci: client specific information
  67  * @partnum: part number
  68  * @variant: the detected STMPE model number
  69  * @regs: list of addresses of registers which are at different addresses on
  70  *        different variants.  Indexed by one of STMPE_IDX_*.
  71  * @irq: irq number for stmpe
  72  * @irq_base: starting IRQ number for internal IRQs
  73  * @num_gpios: number of gpios, differs for variants
  74  * @ier: cache of IER registers for bus_lock
  75  * @oldier: cache of IER registers for bus_lock
  76  * @pdata: platform data
  77  */
  78 struct stmpe {
  79         struct mutex lock;
  80         struct mutex irq_lock;
  81         struct device *dev;
  82         void *client;
  83         struct stmpe_client_info *ci;
  84         enum stmpe_partnum partnum;
  85         struct stmpe_variant_info *variant;
  86         const u8 *regs;
  87
  88         int irq;
  89         int irq_base;
  90         int num_gpios;
  91         u8 ier[2];
  92         u8 oldier[2];
  93         struct stmpe_platform_data *pdata;
  94 };
  95
  96 extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
  97 extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
  98 extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
  99                             u8 *values);
 100 extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
 101                              const u8 *values);
 102 extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
 103 extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
 104                              enum stmpe_block block);
 105 extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
 106 extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
 107
 108 struct matrix_keymap_data;
 109
 110 /**
 111  * struct stmpe_keypad_platform_data - STMPE keypad platform data
 112  * @keymap_data: key map table and size
 113  * @debounce_ms: debounce interval, in ms.  Maximum is
 114  *               %STMPE_KEYPAD_MAX_DEBOUNCE.
 115  * @scan_count: number of key scanning cycles to confirm key data.
 116  *              Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
 117  * @no_autorepeat: disable key autorepeat
 118  */
 119 struct stmpe_keypad_platform_data {
 120         struct matrix_keymap_data *keymap_data;
 121         unsigned int debounce_ms;
 122         unsigned int scan_count;
 123         bool no_autorepeat;
 124 };
 125
 126 #define STMPE_GPIO_NOREQ_811_TOUCH      (0xf0)
 127
 128 /**
 129  * struct stmpe_gpio_platform_data - STMPE GPIO platform data
 130  * @gpio_base: first gpio number assigned.  A maximum of
 131  *             %STMPE_NR_GPIOS GPIOs will be allocated.
 132  * @norequest_mask: bitmask specifying which GPIOs should _not_ be
 133  *                  requestable due to different usage (e.g. touch, keypad)
 134  *                  STMPE_GPIO_NOREQ_* macros can be used here.
 135  * @setup: board specific setup callback.
 136  * @remove: board specific remove callback
 137  */
 138 struct stmpe_gpio_platform_data {
 139         int gpio_base;
 140         unsigned norequest_mask;
 141         void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
 142         void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
 143 };
 144
 145 /**
 146  * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
 147  * data
 148  * @sample_time: ADC converstion time in number of clock.
 149  * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
 150  * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
 151  * recommended is 4.
 152  * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
 153  * @ref_sel: ADC reference source
 154  * (0 -> internal reference, 1 -> external reference)
 155  * @adc_freq: ADC Clock speed
 156  * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
 157  * @ave_ctrl: Sample average control
 158  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
 159  * @touch_det_delay: Touch detect interrupt delay
 160  * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
 161  * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
 162  * recommended is 3
 163  * @settling: Panel driver settling time
 164  * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
 165  * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
 166  * recommended is 2
 167  * @fraction_z: Length of the fractional part in z
 168  * (fraction_z ([0..7]) = Count of the fractional part)
 169  * recommended is 7
 170  * @i_drive: current limit value of the touchscreen drivers
 171  * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
 172  *
 173  * */
 174 struct stmpe_ts_platform_data {
 175        u8 sample_time;
 176        u8 mod_12b;
 177        u8 ref_sel;
 178        u8 adc_freq;
 179        u8 ave_ctrl;
 180        u8 touch_det_delay;
 181        u8 settling;
 182        u8 fraction_z;
 183        u8 i_drive;
 184 };
 185
 186 /**
 187  * struct stmpe_platform_data - STMPE platform data
 188  * @id: device id to distinguish between multiple STMPEs on the same board
 189  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
 190  * @irq_trigger: IRQ trigger to use for the interrupt to the host
 191  * @irq_invert_polarity: IRQ line is connected with reversed polarity
 192  * @autosleep: bool to enable/disable stmpe autosleep
 193  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
 194  * @irq_base: base IRQ number.  %STMPE_NR_IRQS irqs will be used, or
 195  *            %STMPE_NR_INTERNAL_IRQS if the GPIO driver is not used.
 196  * @irq_over_gpio: true if gpio is used to get irq
 197  * @irq_gpio: gpio number over which irq will be requested (significant only if
 198  *            irq_over_gpio is true)
 199  * @gpio: GPIO-specific platform data
 200  * @keypad: keypad-specific platform data
 201  * @ts: touchscreen-specific platform data
 202  */
 203 struct stmpe_platform_data {
 204         int id;
 205         unsigned int blocks;
 206         int irq_base;
 207         unsigned int irq_trigger;
 208         bool irq_invert_polarity;
 209         bool autosleep;
 210         bool irq_over_gpio;
 211         int irq_gpio;
 212         int autosleep_timeout;
 213
 214         struct stmpe_gpio_platform_data *gpio;
 215         struct stmpe_keypad_platform_data *keypad;
 216         struct stmpe_ts_platform_data *ts;
 217 };
 218
 219 #define STMPE_NR_INTERNAL_IRQS  9
 220 #define STMPE_INT_GPIO(x)       (STMPE_NR_INTERNAL_IRQS + (x))
 221
 222 #define STMPE_NR_GPIOS          24
 223 #define STMPE_NR_IRQS           STMPE_INT_GPIO(STMPE_NR_GPIOS)
 224
 225 #endif