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 struct regulator;
  15
  16 enum stmpe_block {
  17         STMPE_BLOCK_GPIO        = 1 << 0,
  18         STMPE_BLOCK_KEYPAD      = 1 << 1,
  19         STMPE_BLOCK_TOUCHSCREEN = 1 << 2,
  20         STMPE_BLOCK_ADC         = 1 << 3,
  21         STMPE_BLOCK_PWM         = 1 << 4,
  22         STMPE_BLOCK_ROTATOR     = 1 << 5,
  23 };
  24
  25 enum stmpe_partnum {
  26         STMPE610,
  27         STMPE801,
  28         STMPE811,
  29         STMPE1601,
  30         STMPE1801,
  31         STMPE2401,
  32         STMPE2403,
  33         STMPE_NBR_PARTS
  34 };
  35
  36 /*
  37  * For registers whose locations differ on variants,  the correct address is
  38  * obtained by indexing stmpe->regs with one of the following.
  39  */
  40 enum {
  41         STMPE_IDX_CHIP_ID,
  42         STMPE_IDX_ICR_LSB,
  43         STMPE_IDX_IER_LSB,
  44         STMPE_IDX_ISR_LSB,
  45         STMPE_IDX_ISR_MSB,
  46         STMPE_IDX_GPMR_LSB,
  47         STMPE_IDX_GPSR_LSB,
  48         STMPE_IDX_GPCR_LSB,
  49         STMPE_IDX_GPDR_LSB,
  50         STMPE_IDX_GPEDR_MSB,
  51         STMPE_IDX_GPRER_LSB,
  52         STMPE_IDX_GPFER_LSB,
  53         STMPE_IDX_GPPUR_LSB,
  54         STMPE_IDX_GPPDR_LSB,
  55         STMPE_IDX_GPAFR_U_MSB,
  56         STMPE_IDX_IEGPIOR_LSB,
  57         STMPE_IDX_ISGPIOR_LSB,
  58         STMPE_IDX_ISGPIOR_MSB,
  59         STMPE_IDX_MAX,
  60 };
  61
  62
  63 struct stmpe_variant_info;
  64 struct stmpe_client_info;
  65
  66 /**
  67  * struct stmpe - STMPE MFD structure
  68  * @vcc: optional VCC regulator
  69  * @vio: optional VIO regulator
  70  * @lock: lock protecting I/O operations
  71  * @irq_lock: IRQ bus lock
  72  * @dev: device, mostly for dev_dbg()
  73  * @irq_domain: IRQ domain
  74  * @client: client - i2c or spi
  75  * @ci: client specific information
  76  * @partnum: part number
  77  * @variant: the detected STMPE model number
  78  * @regs: list of addresses of registers which are at different addresses on
  79  *        different variants.  Indexed by one of STMPE_IDX_*.
  80  * @irq: irq number for stmpe
  81  * @num_gpios: number of gpios, differs for variants
  82  * @ier: cache of IER registers for bus_lock
  83  * @oldier: cache of IER registers for bus_lock
  84  * @pdata: platform data
  85  */
  86 struct stmpe {
  87         struct regulator *vcc;
  88         struct regulator *vio;
  89         struct mutex lock;
  90         struct mutex irq_lock;
  91         struct device *dev;
  92         struct irq_domain *domain;
  93         void *client;
  94         struct stmpe_client_info *ci;
  95         enum stmpe_partnum partnum;
  96         struct stmpe_variant_info *variant;
  97         const u8 *regs;
  98
  99         int irq;
 100         int num_gpios;
 101         u8 ier[2];
 102         u8 oldier[2];
 103         struct stmpe_platform_data *pdata;
 104 };
 105
 106 extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
 107 extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
 108 extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
 109                             u8 *values);
 110 extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
 111                              const u8 *values);
 112 extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
 113 extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
 114                              enum stmpe_block block);
 115 extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
 116 extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
 117
 118 #define STMPE_GPIO_NOREQ_811_TOUCH      (0xf0)
 119
 120 /**
 121  * struct stmpe_platform_data - STMPE platform data
 122  * @id: device id to distinguish between multiple STMPEs on the same board
 123  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
 124  * @irq_trigger: IRQ trigger to use for the interrupt to the host
 125  * @autosleep: bool to enable/disable stmpe autosleep
 126  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
 127  * @irq_over_gpio: true if gpio is used to get irq
 128  * @irq_gpio: gpio number over which irq will be requested (significant only if
 129  *            irq_over_gpio is true)
 130  */
 131 struct stmpe_platform_data {
 132         int id;
 133         unsigned int blocks;
 134         unsigned int irq_trigger;
 135         bool autosleep;
 136         bool irq_over_gpio;
 137         int irq_gpio;
 138         int autosleep_timeout;
 139 };
 140
 141 #endif