1700f5fde8
This patch enables ADC filtering on UCB1400 codec by default. The benefit from this change is mostly on some Colibri boards where the ADCSYNC pin of the UCB1400 codec isn't connected causing the touchscreen to jitter very badly. This change has no visible effect on boards where the ADCSYNC pin is connected. Signed-off-by: Marek Vasut <marek.vasut@gmail.com> Tested-by: Palo Revak <palo@bielyvlk.sk> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
151 lines
3.9 KiB
C
151 lines
3.9 KiB
C
/*
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* Register definitions and functions for:
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* Philips UCB1400 driver
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*
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* Based on ucb1400_ts:
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* Author: Nicolas Pitre
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* Created: September 25, 2006
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* Copyright: MontaVista Software, Inc.
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*
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* Spliting done by: Marek Vasut <marek.vasut@gmail.com>
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* If something doesnt work and it worked before spliting, e-mail me,
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* dont bother Nicolas please ;-)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This code is heavily based on ucb1x00-*.c copyrighted by Russell King
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* covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has
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* been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
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*/
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#ifndef _LINUX__UCB1400_H
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#define _LINUX__UCB1400_H
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#include <sound/ac97_codec.h>
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#include <linux/mutex.h>
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#include <linux/platform_device.h>
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/*
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* UCB1400 AC-link registers
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*/
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#define UCB_IO_DATA 0x5a
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#define UCB_IO_DIR 0x5c
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#define UCB_IE_RIS 0x5e
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#define UCB_IE_FAL 0x60
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#define UCB_IE_STATUS 0x62
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#define UCB_IE_CLEAR 0x62
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#define UCB_IE_ADC (1 << 11)
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#define UCB_IE_TSPX (1 << 12)
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#define UCB_TS_CR 0x64
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#define UCB_TS_CR_TSMX_POW (1 << 0)
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#define UCB_TS_CR_TSPX_POW (1 << 1)
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#define UCB_TS_CR_TSMY_POW (1 << 2)
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#define UCB_TS_CR_TSPY_POW (1 << 3)
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#define UCB_TS_CR_TSMX_GND (1 << 4)
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#define UCB_TS_CR_TSPX_GND (1 << 5)
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#define UCB_TS_CR_TSMY_GND (1 << 6)
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#define UCB_TS_CR_TSPY_GND (1 << 7)
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#define UCB_TS_CR_MODE_INT (0 << 8)
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#define UCB_TS_CR_MODE_PRES (1 << 8)
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#define UCB_TS_CR_MODE_POS (2 << 8)
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#define UCB_TS_CR_BIAS_ENA (1 << 11)
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#define UCB_TS_CR_TSPX_LOW (1 << 12)
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#define UCB_TS_CR_TSMX_LOW (1 << 13)
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#define UCB_ADC_CR 0x66
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#define UCB_ADC_SYNC_ENA (1 << 0)
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#define UCB_ADC_VREFBYP_CON (1 << 1)
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#define UCB_ADC_INP_TSPX (0 << 2)
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#define UCB_ADC_INP_TSMX (1 << 2)
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#define UCB_ADC_INP_TSPY (2 << 2)
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#define UCB_ADC_INP_TSMY (3 << 2)
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#define UCB_ADC_INP_AD0 (4 << 2)
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#define UCB_ADC_INP_AD1 (5 << 2)
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#define UCB_ADC_INP_AD2 (6 << 2)
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#define UCB_ADC_INP_AD3 (7 << 2)
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#define UCB_ADC_EXT_REF (1 << 5)
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#define UCB_ADC_START (1 << 7)
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#define UCB_ADC_ENA (1 << 15)
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#define UCB_ADC_DATA 0x68
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#define UCB_ADC_DAT_VALID (1 << 15)
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#define UCB_FCSR 0x6c
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#define UCB_FCSR_AVE (1 << 12)
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#define UCB_ADC_DAT_MASK 0x3ff
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#define UCB_ID 0x7e
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#define UCB_ID_1400 0x4304
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struct ucb1400_ts {
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struct input_dev *ts_idev;
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struct task_struct *ts_task;
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int id;
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wait_queue_head_t ts_wait;
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unsigned int ts_restart:1;
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int irq;
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unsigned int irq_pending; /* not bit field shared */
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struct snd_ac97 *ac97;
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};
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struct ucb1400 {
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struct platform_device *ucb1400_ts;
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};
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static inline u16 ucb1400_reg_read(struct snd_ac97 *ac97, u16 reg)
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{
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return ac97->bus->ops->read(ac97, reg);
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}
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static inline void ucb1400_reg_write(struct snd_ac97 *ac97, u16 reg, u16 val)
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{
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ac97->bus->ops->write(ac97, reg, val);
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}
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static inline u16 ucb1400_gpio_get_value(struct snd_ac97 *ac97, u16 gpio)
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{
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return ucb1400_reg_read(ac97, UCB_IO_DATA) & (1 << gpio);
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}
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static inline void ucb1400_gpio_set_value(struct snd_ac97 *ac97, u16 gpio,
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u16 val)
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{
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ucb1400_reg_write(ac97, UCB_IO_DATA, val ?
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ucb1400_reg_read(ac97, UCB_IO_DATA) | (1 << gpio) :
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ucb1400_reg_read(ac97, UCB_IO_DATA) & ~(1 << gpio));
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}
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static inline u16 ucb1400_gpio_get_direction(struct snd_ac97 *ac97, u16 gpio)
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{
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return ucb1400_reg_read(ac97, UCB_IO_DIR) & (1 << gpio);
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}
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static inline void ucb1400_gpio_set_direction(struct snd_ac97 *ac97, u16 gpio,
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u16 dir)
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{
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ucb1400_reg_write(ac97, UCB_IO_DIR, dir ?
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ucb1400_reg_read(ac97, UCB_IO_DIR) | (1 << gpio) :
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ucb1400_reg_read(ac97, UCB_IO_DIR) & ~(1 << gpio));
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}
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static inline void ucb1400_adc_enable(struct snd_ac97 *ac97)
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{
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ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA);
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}
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static inline void ucb1400_adc_disable(struct snd_ac97 *ac97)
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{
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ucb1400_reg_write(ac97, UCB_ADC_CR, 0);
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}
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unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
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int adcsync);
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#endif
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