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TOMOYO Linux Cross Reference
Linux/include/linux/mfd/stmpe.h

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  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_ts_platform_data - stmpe811 touch screen controller platform
122  * data
123  * @sample_time: ADC converstion time in number of clock.
124  * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
125  * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
126  * recommended is 4.
127  * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
128  * @ref_sel: ADC reference source
129  * (0 -> internal reference, 1 -> external reference)
130  * @adc_freq: ADC Clock speed
131  * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
132  * @ave_ctrl: Sample average control
133  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
134  * @touch_det_delay: Touch detect interrupt delay
135  * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
136  * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
137  * recommended is 3
138  * @settling: Panel driver settling time
139  * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
140  * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
141  * recommended is 2
142  * @fraction_z: Length of the fractional part in z
143  * (fraction_z ([0..7]) = Count of the fractional part)
144  * recommended is 7
145  * @i_drive: current limit value of the touchscreen drivers
146  * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
147  *
148  * */
149 struct stmpe_ts_platform_data {
150        u8 sample_time;
151        u8 mod_12b;
152        u8 ref_sel;
153        u8 adc_freq;
154        u8 ave_ctrl;
155        u8 touch_det_delay;
156        u8 settling;
157        u8 fraction_z;
158        u8 i_drive;
159 };
160 
161 /**
162  * struct stmpe_platform_data - STMPE platform data
163  * @id: device id to distinguish between multiple STMPEs on the same board
164  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
165  * @irq_trigger: IRQ trigger to use for the interrupt to the host
166  * @autosleep: bool to enable/disable stmpe autosleep
167  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
168  * @irq_over_gpio: true if gpio is used to get irq
169  * @irq_gpio: gpio number over which irq will be requested (significant only if
170  *            irq_over_gpio is true)
171  * @ts: touchscreen-specific platform data
172  */
173 struct stmpe_platform_data {
174         int id;
175         unsigned int blocks;
176         unsigned int irq_trigger;
177         bool autosleep;
178         bool irq_over_gpio;
179         int irq_gpio;
180         int autosleep_timeout;
181 
182         struct stmpe_ts_platform_data *ts;
183 };
184 
185 #endif
186 

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