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Linux/include/linux/ucb1400.h

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  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
163 

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