| 1 | /*
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| 2 | * Copyright (c) 2010 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup genarch
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | * @brief Samsung S3C24xx on-chip ADC and touch-screen interface driver.
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| 35 | */
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| 36 |
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| 37 | #ifndef S3C24XX_TS_H_
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| 38 | #define S3C24XX_TS_H_
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| 39 |
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| 40 | #include <sys/types.h>
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| 41 |
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| 42 | /** S3C24xx ADC and touch-screen I/O */
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| 43 | typedef struct {
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| 44 | uint32_t con;
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| 45 | uint32_t tsc;
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| 46 | uint32_t dly;
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| 47 | uint32_t dat0;
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| 48 | uint32_t dat1;
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| 49 | uint32_t updn;
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| 50 | } s3c24xx_adc_io_t;
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| 51 |
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| 52 | /* Fields in ADCCON register */
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| 53 | #define ADCCON_ECFLG 0x8000
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| 54 | #define ADCCON_PRSCEN 0x4000
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| 55 |
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| 56 | #define ADCCON_PRSCVL(val) (((val) & 0xff) << 6)
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| 57 |
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| 58 | #define ADCCON_SEL_MUX(smux) (((smux) & 7) << 3)
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| 59 |
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| 60 | #define ADCCON_STDBM 0x0004
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| 61 | #define ADCCON_READ_START 0x0002
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| 62 | #define ADCCON_ENABLE_START 0x0001
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| 63 |
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| 64 | /* Values for ADCCON_SEL_MUX */
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| 65 | #define SMUX_AIN0 0
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| 66 | #define SMUX_AIN1 1
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| 67 | #define SMUX_AIN2 2
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| 68 | #define SMUX_AIN3 3
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| 69 | #define SMUX_YM 4
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| 70 | #define SMUX_YP 5
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| 71 | #define SMUX_XM 6
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| 72 | #define SMUX_XP 7
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| 73 |
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| 74 |
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| 75 | /* Fields in ADCTSC register */
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| 76 | #define ADCTSC_DSUD_UP 0x0100
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| 77 | #define ADCTSC_YM_ENABLE 0x0080
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| 78 | #define ADCTSC_YP_DISABLE 0x0040
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| 79 | #define ADCTSC_XM_ENABLE 0x0020
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| 80 | #define ADCTSC_XP_DISABLE 0x0010
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| 81 | #define ADCTSC_PULLUP_DISABLE 0x0008
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| 82 | #define ADCTSC_AUTO_PST 0x0004
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| 83 |
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| 84 | #define ADCTSC_XY_PST_NOOP 0x0000
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| 85 | #define ADCTSC_XY_PST_X 0x0001
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| 86 | #define ADCTSC_XY_PST_Y 0x0002
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| 87 | #define ADCTSC_XY_PST_WAITINT 0x0003
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| 88 | #define ADCTSC_XY_PST_MASK 0x0003
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| 89 |
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| 90 | /* Fields in ADCDAT0, ADCDAT1 registers */
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| 91 | #define ADCDAT_UPDOWN 0x8000
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| 92 | #define ADCDAT_AUTO_PST 0x4000
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| 93 |
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| 94 | /* Fields in ADCUPDN register */
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| 95 | #define ADCUPDN_TSC_UP 0x0002
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| 96 | #define ADCUPDN_TSC_DN 0x0001
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| 97 |
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| 98 | /** Touchscreen interrupt number */
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| 99 | #define S3C24XX_TS_INR 31
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| 100 |
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| 101 | /** Touchscreen I/O address */
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| 102 | #define S3C24XX_TS_ADDR 0x58000000
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| 103 |
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| 104 | typedef enum {
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| 105 | ts_wait_pendown,
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| 106 | ts_sample_pos,
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| 107 | ts_wait_penup
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| 108 | } ts_state_t;
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| 109 |
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| 110 | typedef enum {
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| 111 | updn_up,
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| 112 | updn_down
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| 113 | } ts_updn_t;
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| 114 |
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| 115 | /** S3C24xx touchscreen driver instance */
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| 116 | typedef struct {
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| 117 | /** Physical device address */
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| 118 | uintptr_t paddr;
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| 119 |
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| 120 | /** Device I/O structure */
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| 121 | s3c24xx_adc_io_t *io;
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| 122 |
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| 123 | /** Callback phone to the client */
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| 124 | int client_phone;
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| 125 |
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| 126 | /** Device handle */
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| 127 | devmap_handle_t devmap_handle;
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| 128 |
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| 129 | /** Device/driver state */
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| 130 | ts_state_t state;
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| 131 |
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| 132 | /** Previous position reported to client. */
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| 133 | int last_x;
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| 134 | int last_y;
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| 135 | } s3c24xx_ts_t;
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| 136 |
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| 137 | #endif
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| 138 |
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| 139 | /** @}
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| 140 | */
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