linux-imx

/*

 * Core functions for:

 *  Philips UCB1400 multifunction chip

 *

 * Based on ucb1400_ts.c:

 *  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.

 */

​

#include <linux/module.h>

#include <linux/sched.h>

#include <linux/slab.h>

#include <linux/ucb1400.h>

​

unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,

        int adcsync)

{

    unsigned int val;

​

    if (adcsync)

        adc_channel |= UCB_ADC_SYNC_ENA;

​

    ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel);

    ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA | adc_channel |

            UCB_ADC_START);

​

    while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA))

                & UCB_ADC_DAT_VALID))

        schedule_timeout_uninterruptible(1);

​

    return val & UCB_ADC_DAT_MASK;

}

EXPORT_SYMBOL_GPL(ucb1400_adc_read);

​

static int ucb1400_core_probe(struct device *dev)

{

    int err;

    struct ucb1400 *ucb;

    struct ucb1400_ts ucb_ts;

    struct ucb1400_gpio ucb_gpio;

    struct snd_ac97 *ac97;

    struct ucb1400_pdata *pdata = dev_get_platdata(dev);

​

    memset(&ucb_ts, 0, sizeof(ucb_ts));

    memset(&ucb_gpio, 0, sizeof(ucb_gpio));

​

    ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);

    if (!ucb) {

        err = -ENOMEM;

        goto err;