include/linux/ucb1400.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Register definitions and functions for:
   4  *  Philips UCB1400 driver
   5  *
   6  * Based on ucb1400_ts:
   7  *  Author:     Nicolas Pitre
   8  *  Created:    September 25, 2006
   9  *  Copyright:  MontaVista Software, Inc.
  10  *
  11  * Spliting done by: Marek Vasut <marek.vasut@gmail.com>
  12  * If something doesn't work and it worked before spliting, e-mail me,
  13  * dont bother Nicolas please ;-)
  14  *
  15  * This code is heavily based on ucb1x00-*.c copyrighted by Russell King
  16  * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
  17  * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
  18  */
  19
  20 #ifndef _LINUX__UCB1400_H
  21 #define _LINUX__UCB1400_H
  22
  23 #include <sound/ac97_codec.h>
  24 #include <linux/mutex.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/gpio.h>
  27
  28 /*
  29  * UCB1400 AC-link registers
  30  */
  31
  32 #define UCB_IO_DATA             0x5a
  33 #define UCB_IO_DIR              0x5c
  34 #define UCB_IE_RIS              0x5e
  35 #define UCB_IE_FAL              0x60
  36 #define UCB_IE_STATUS           0x62
  37 #define UCB_IE_CLEAR            0x62
  38 #define UCB_IE_ADC              (1 << 11)
  39 #define UCB_IE_TSPX             (1 << 12)
  40
  41 #define UCB_TS_CR               0x64
  42 #define UCB_TS_CR_TSMX_POW      (1 << 0)
  43 #define UCB_TS_CR_TSPX_POW      (1 << 1)
  44 #define UCB_TS_CR_TSMY_POW      (1 << 2)
  45 #define UCB_TS_CR_TSPY_POW      (1 << 3)
  46 #define UCB_TS_CR_TSMX_GND      (1 << 4)
  47 #define UCB_TS_CR_TSPX_GND      (1 << 5)
  48 #define UCB_TS_CR_TSMY_GND      (1 << 6)
  49 #define UCB_TS_CR_TSPY_GND      (1 << 7)
  50 #define UCB_TS_CR_MODE_INT      (0 << 8)
  51 #define UCB_TS_CR_MODE_PRES     (1 << 8)
  52 #define UCB_TS_CR_MODE_POS      (2 << 8)
  53 #define UCB_TS_CR_BIAS_ENA      (1 << 11)
  54 #define UCB_TS_CR_TSPX_LOW      (1 << 12)
  55 #define UCB_TS_CR_TSMX_LOW      (1 << 13)
  56
  57 #define UCB_ADC_CR              0x66
  58 #define UCB_ADC_SYNC_ENA        (1 << 0)
  59 #define UCB_ADC_VREFBYP_CON     (1 << 1)
  60 #define UCB_ADC_INP_TSPX        (0 << 2)
  61 #define UCB_ADC_INP_TSMX        (1 << 2)
  62 #define UCB_ADC_INP_TSPY        (2 << 2)
  63 #define UCB_ADC_INP_TSMY        (3 << 2)
  64 #define UCB_ADC_INP_AD0         (4 << 2)
  65 #define UCB_ADC_INP_AD1         (5 << 2)
  66 #define UCB_ADC_INP_AD2         (6 << 2)
  67 #define UCB_ADC_INP_AD3         (7 << 2)
  68 #define UCB_ADC_EXT_REF         (1 << 5)
  69 #define UCB_ADC_START           (1 << 7)
  70 #define UCB_ADC_ENA             (1 << 15)
  71
  72 #define UCB_ADC_DATA            0x68
  73 #define UCB_ADC_DAT_VALID       (1 << 15)
  74
  75 #define UCB_FCSR                0x6c
  76 #define UCB_FCSR_AVE            (1 << 12)
  77
  78 #define UCB_ADC_DAT_MASK        0x3ff
  79
  80 #define UCB_ID                  0x7e
  81 #define UCB_ID_1400             0x4304
  82
  83 struct ucb1400_gpio {
  84         struct gpio_chip        gc;
  85         struct snd_ac97         *ac97;
  86         int                     gpio_offset;
  87         int                     (*gpio_setup)(struct device *dev, int ngpio);
  88         int                     (*gpio_teardown)(struct device *dev, int ngpio);
  89 };
  90
  91 struct ucb1400_ts {
  92         struct input_dev        *ts_idev;
  93         int                     id;
  94         int                     irq;
  95         struct snd_ac97         *ac97;
  96         wait_queue_head_t       ts_wait;
  97         bool                    stopped;
  98 };
  99
 100 struct ucb1400 {
 101         struct platform_device  *ucb1400_ts;
 102         struct platform_device  *ucb1400_gpio;
 103 };
 104
 105 struct ucb1400_pdata {
 106         int     irq;
 107         int     gpio_offset;
 108         int     (*gpio_setup)(struct device *dev, int ngpio);
 109         int     (*gpio_teardown)(struct device *dev, int ngpio);
 110 };
 111
 112 static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
 113 {
 114         return ac97->bus->ops->read(ac97, reg);
 115 }
 116
 117 static inline void ucb1400_reg_write(struct snd_ac97 *ac97, u16 reg, u16 val)
 118 {
 119         ac97->bus->ops->write(ac97, reg, val);
 120 }
 121
 122 static inline u16 ucb1400_gpio_get_value(struct snd_ac97 *ac97, u16 gpio)
 123 {
 124         return ucb1400_reg_read(ac97, UCB_IO_DATA) & (1 << gpio);
 125 }
 126
 127 static inline void ucb1400_gpio_set_value(struct snd_ac97 *ac97, u16 gpio,
 128                                                 u16 val)
 129 {
 130         ucb1400_reg_write(ac97, UCB_IO_DATA, val ?
 131                         ucb1400_reg_read(ac97, UCB_IO_DATA) | (1 << gpio) :
 132                         ucb1400_reg_read(ac97, UCB_IO_DATA) & ~(1 << gpio));
 133 }
 134
 135 static inline u16 ucb1400_gpio_get_direction(struct snd_ac97 *ac97, u16 gpio)
 136 {
 137         return ucb1400_reg_read(ac97, UCB_IO_DIR) & (1 << gpio);
 138 }
 139
 140 static inline void ucb1400_gpio_set_direction(struct snd_ac97 *ac97, u16 gpio,
 141                                                 u16 dir)
 142 {
 143         ucb1400_reg_write(ac97, UCB_IO_DIR, dir ?
 144                         ucb1400_reg_read(ac97, UCB_IO_DIR) | (1 << gpio) :
 145                         ucb1400_reg_read(ac97, UCB_IO_DIR) & ~(1 << gpio));
 146 }
 147
 148 static inline void ucb1400_adc_enable(struct snd_ac97 *ac97)
 149 {
 150         ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA);
 151 }
 152
 153 static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
 154 {
 155         ucb1400_reg_write(ac97, UCB_ADC_CR, 0);
 156 }
 157
 158
 159 unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
 160                               int adcsync);
 161
 162 #endif