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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_GPAFR_U_MSB,
 54         STMPE_IDX_IEGPIOR_LSB,
 55         STMPE_IDX_ISGPIOR_LSB,
 56         STMPE_IDX_ISGPIOR_MSB,
 57         STMPE_IDX_MAX,
 58 };
 59 
 60 
 61 struct stmpe_variant_info;
 62 struct stmpe_client_info;
 63 
 64 /**
 65  * struct stmpe - STMPE MFD structure
 66  * @vcc: optional VCC regulator
 67  * @vio: optional VIO regulator
 68  * @lock: lock protecting I/O operations
 69  * @irq_lock: IRQ bus lock
 70  * @dev: device, mostly for dev_dbg()
 71  * @irq_domain: IRQ domain
 72  * @client: client - i2c or spi
 73  * @ci: client specific information
 74  * @partnum: part number
 75  * @variant: the detected STMPE model number
 76  * @regs: list of addresses of registers which are at different addresses on
 77  *        different variants.  Indexed by one of STMPE_IDX_*.
 78  * @irq: irq number for stmpe
 79  * @num_gpios: number of gpios, differs for variants
 80  * @ier: cache of IER registers for bus_lock
 81  * @oldier: cache of IER registers for bus_lock
 82  * @pdata: platform data
 83  */
 84 struct stmpe {
 85         struct regulator *vcc;
 86         struct regulator *vio;
 87         struct mutex lock;
 88         struct mutex irq_lock;
 89         struct device *dev;
 90         struct irq_domain *domain;
 91         void *client;
 92         struct stmpe_client_info *ci;
 93         enum stmpe_partnum partnum;
 94         struct stmpe_variant_info *variant;
 95         const u8 *regs;
 96 
 97         int irq;
 98         int num_gpios;
 99         u8 ier[2];
100         u8 oldier[2];
101         struct stmpe_platform_data *pdata;
102 };
103 
104 extern int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 data);
105 extern int stmpe_reg_read(struct stmpe *stmpe, u8 reg);
106 extern int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
107                             u8 *values);
108 extern int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
109                              const u8 *values);
110 extern int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val);
111 extern int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins,
112                              enum stmpe_block block);
113 extern int stmpe_enable(struct stmpe *stmpe, unsigned int blocks);
114 extern int stmpe_disable(struct stmpe *stmpe, unsigned int blocks);
115 
116 struct matrix_keymap_data;
117 
118 /**
119  * struct stmpe_keypad_platform_data - STMPE keypad platform data
120  * @keymap_data: key map table and size
121  * @debounce_ms: debounce interval, in ms.  Maximum is
122  *               %STMPE_KEYPAD_MAX_DEBOUNCE.
123  * @scan_count: number of key scanning cycles to confirm key data.
124  *              Maximum is %STMPE_KEYPAD_MAX_SCAN_COUNT.
125  * @no_autorepeat: disable key autorepeat
126  */
127 struct stmpe_keypad_platform_data {
128         const struct matrix_keymap_data *keymap_data;
129         unsigned int debounce_ms;
130         unsigned int scan_count;
131         bool no_autorepeat;
132 };
133 
134 #define STMPE_GPIO_NOREQ_811_TOUCH      (0xf0)
135 
136 /**
137  * struct stmpe_gpio_platform_data - STMPE GPIO platform data
138  * @norequest_mask: bitmask specifying which GPIOs should _not_ be
139  *                  requestable due to different usage (e.g. touch, keypad)
140  *                  STMPE_GPIO_NOREQ_* macros can be used here.
141  * @setup: board specific setup callback.
142  * @remove: board specific remove callback
143  */
144 struct stmpe_gpio_platform_data {
145         unsigned norequest_mask;
146         void (*setup)(struct stmpe *stmpe, unsigned gpio_base);
147         void (*remove)(struct stmpe *stmpe, unsigned gpio_base);
148 };
149 
150 /**
151  * struct stmpe_ts_platform_data - stmpe811 touch screen controller platform
152  * data
153  * @sample_time: ADC converstion time in number of clock.
154  * (0 -> 36 clocks, 1 -> 44 clocks, 2 -> 56 clocks, 3 -> 64 clocks,
155  * 4 -> 80 clocks, 5 -> 96 clocks, 6 -> 144 clocks),
156  * recommended is 4.
157  * @mod_12b: ADC Bit mode (0 -> 10bit ADC, 1 -> 12bit ADC)
158  * @ref_sel: ADC reference source
159  * (0 -> internal reference, 1 -> external reference)
160  * @adc_freq: ADC Clock speed
161  * (0 -> 1.625 MHz, 1 -> 3.25 MHz, 2 || 3 -> 6.5 MHz)
162  * @ave_ctrl: Sample average control
163  * (0 -> 1 sample, 1 -> 2 samples, 2 -> 4 samples, 3 -> 8 samples)
164  * @touch_det_delay: Touch detect interrupt delay
165  * (0 -> 10 us, 1 -> 50 us, 2 -> 100 us, 3 -> 500 us,
166  * 4-> 1 ms, 5 -> 5 ms, 6 -> 10 ms, 7 -> 50 ms)
167  * recommended is 3
168  * @settling: Panel driver settling time
169  * (0 -> 10 us, 1 -> 100 us, 2 -> 500 us, 3 -> 1 ms,
170  * 4 -> 5 ms, 5 -> 10 ms, 6 for 50 ms, 7 -> 100 ms)
171  * recommended is 2
172  * @fraction_z: Length of the fractional part in z
173  * (fraction_z ([0..7]) = Count of the fractional part)
174  * recommended is 7
175  * @i_drive: current limit value of the touchscreen drivers
176  * (0 -> 20 mA typical 35 mA max, 1 -> 50 mA typical 80 mA max)
177  *
178  * */
179 struct stmpe_ts_platform_data {
180        u8 sample_time;
181        u8 mod_12b;
182        u8 ref_sel;
183        u8 adc_freq;
184        u8 ave_ctrl;
185        u8 touch_det_delay;
186        u8 settling;
187        u8 fraction_z;
188        u8 i_drive;
189 };
190 
191 /**
192  * struct stmpe_platform_data - STMPE platform data
193  * @id: device id to distinguish between multiple STMPEs on the same board
194  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
195  * @irq_trigger: IRQ trigger to use for the interrupt to the host
196  * @autosleep: bool to enable/disable stmpe autosleep
197  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
198  * @irq_over_gpio: true if gpio is used to get irq
199  * @irq_gpio: gpio number over which irq will be requested (significant only if
200  *            irq_over_gpio is true)
201  * @gpio: GPIO-specific platform data
202  * @keypad: keypad-specific platform data
203  * @ts: touchscreen-specific platform data
204  */
205 struct stmpe_platform_data {
206         int id;
207         unsigned int blocks;
208         unsigned int irq_trigger;
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 #endif
220 

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