ucb1400.h

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/*
 * Register definitions and functions for:
 *  Philips UCB1400 driver
 *
 * Based on ucb1400_ts:
 *  Author: Nicolas Pitre
 *  Created:    September 25, 2006
 *  Copyright:  MontaVista Software, Inc.
 *
 * Spliting done by: Marek Vasut <[email protected]>
 * If something doesn't work and it worked before spliting, e-mail me,
 * dont bother Nicolas please ;-)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This code is heavily based on ucb1x00-*.c copyrighted by Russell King
 * covering the UCB1100, UCB1200 and UCB1300..  Support for the UCB1400 has
 * been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
 */

#ifndef _LINUX__UCB1400_H
#define _LINUX__UCB1400_H

#include <sound/ac97_codec.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>

/*
 * UCB1400 AC-link registers
 */

#define UCB_IO_DATA     0x5a
#define UCB_IO_DIR      0x5c
#define UCB_IE_RIS      0x5e
#define UCB_IE_FAL      0x60
#define UCB_IE_STATUS       0x62
#define UCB_IE_CLEAR        0x62
#define UCB_IE_ADC      (1 << 11)
#define UCB_IE_TSPX     (1 << 12)

#define UCB_TS_CR       0x64
#define UCB_TS_CR_TSMX_POW  (1 << 0)
#define UCB_TS_CR_TSPX_POW  (1 << 1)
#define UCB_TS_CR_TSMY_POW  (1 << 2)
#define UCB_TS_CR_TSPY_POW  (1 << 3)
#define UCB_TS_CR_TSMX_GND  (1 << 4)
#define UCB_TS_CR_TSPX_GND  (1 << 5)
#define UCB_TS_CR_TSMY_GND  (1 << 6)
#define UCB_TS_CR_TSPY_GND  (1 << 7)
#define UCB_TS_CR_MODE_INT  (0 << 8)
#define UCB_TS_CR_MODE_PRES (1 << 8)
#define UCB_TS_CR_MODE_POS  (2 << 8)
#define UCB_TS_CR_BIAS_ENA  (1 << 11)
#define UCB_TS_CR_TSPX_LOW  (1 << 12)
#define UCB_TS_CR_TSMX_LOW  (1 << 13)

#define UCB_ADC_CR      0x66
#define UCB_ADC_SYNC_ENA    (1 << 0)
#define UCB_ADC_VREFBYP_CON (1 << 1)
#define UCB_ADC_INP_TSPX    (0 << 2)
#define UCB_ADC_INP_TSMX    (1 << 2)
#define UCB_ADC_INP_TSPY    (2 << 2)
#define UCB_ADC_INP_TSMY    (3 << 2)
#define UCB_ADC_INP_AD0     (4 << 2)
#define UCB_ADC_INP_AD1     (5 << 2)
#define UCB_ADC_INP_AD2     (6 << 2)
#define UCB_ADC_INP_AD3     (7 << 2)
#define UCB_ADC_EXT_REF     (1 << 5)
#define UCB_ADC_START       (1 << 7)
#define UCB_ADC_ENA     (1 << 15)

#define UCB_ADC_DATA        0x68
#define UCB_ADC_DAT_VALID   (1 << 15)

#define UCB_FCSR        0x6c
#define UCB_FCSR_AVE        (1 << 12)

#define UCB_ADC_DAT_MASK    0x3ff

#define UCB_ID          0x7e
#define UCB_ID_1400             0x4304

struct ucb1400_gpio_data {
    int gpio_offset;
    int (*gpio_setup)(struct device *dev, int ngpio);
    int (*gpio_teardown)(struct device *dev, int ngpio);
};

struct ucb1400_gpio {
    struct gpio_chip    gc;
    struct snd_ac97     *ac97;
};

struct ucb1400_ts {
    struct input_dev    *ts_idev;
    int         id;
    int         irq;
    struct snd_ac97     *ac97;
    wait_queue_head_t   ts_wait;
    bool            stopped;
};

struct ucb1400 {
    struct platform_device  *ucb1400_ts;
    struct platform_device  *ucb1400_gpio;
};

struct ucb1400_pdata {
    int irq;
};

static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
{
    return ac97->bus->ops->read(ac97, reg);
}

static inline void ucb1400_reg_write(struct snd_ac97 *ac97, u16 reg, u16 val)
{
    ac97->bus->ops->write(ac97, reg, val);
}

static inline u16 ucb1400_gpio_get_value(struct snd_ac97 *ac97, u16 gpio)
{
    return ucb1400_reg_read(ac97, UCB_IO_DATA) & (1 << gpio);
}

static inline void ucb1400_gpio_set_value(struct snd_ac97 *ac97, u16 gpio,
                        u16 val)
{
    ucb1400_reg_write(ac97, UCB_IO_DATA, val ?
            ucb1400_reg_read(ac97, UCB_IO_DATA) | (1 << gpio) :
            ucb1400_reg_read(ac97, UCB_IO_DATA) & ~(1 << gpio));
}

static inline u16 ucb1400_gpio_get_direction(struct snd_ac97 *ac97, u16 gpio)
{
    return ucb1400_reg_read(ac97, UCB_IO_DIR) & (1 << gpio);
}

static inline void ucb1400_gpio_set_direction(struct snd_ac97 *ac97, u16 gpio,
                        u16 dir)
{
    ucb1400_reg_write(ac97, UCB_IO_DIR, dir ?
            ucb1400_reg_read(ac97, UCB_IO_DIR) | (1 << gpio) :
            ucb1400_reg_read(ac97, UCB_IO_DIR) & ~(1 << gpio));
}

static inline void ucb1400_adc_enable(struct snd_ac97 *ac97)
{
    ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA);
}

static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
{
    ucb1400_reg_write(ac97, UCB_ADC_CR, 0);
}


unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
                  int adcsync);

#ifdef CONFIG_GPIO_UCB1400
void __init ucb1400_gpio_set_data(struct ucb1400_gpio_data *data);
#else
static inline void ucb1400_gpio_set_data(struct ucb1400_gpio_data *data) {}
#endif

#endif