/*
   * 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 <marek.vasut@gmail.com>

   * 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 {
  	struct gpio_chip	gc;
  	struct snd_ac97		*ac97;

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

  };

  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;

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

  };

  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);

  #endif