[net-next-2.6.git] / drivers / mfd / ucb1400_core.c

/*
 * 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 doesnt 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/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;

	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;
	}

	dev_set_drvdata(dev, ucb);

	ac97 = to_ac97_t(dev);

	ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID);
	if (ucb_ts.id != UCB_ID_1400) {
		err = -ENODEV;
		goto err0;
	}

	/* GPIO */
	ucb_gpio.ac97 = ac97;
	ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1);
	if (!ucb->ucb1400_gpio) {
		err = -ENOMEM;
		goto err0;
	}
	err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio,
					sizeof(ucb_gpio));
	if (err)
		goto err1;
	err = platform_device_add(ucb->ucb1400_gpio);
	if (err)
		goto err1;

	/* TOUCHSCREEN */
	ucb_ts.ac97 = ac97;
	ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
	if (!ucb->ucb1400_ts) {
		err = -ENOMEM;
		goto err2;
	}
	err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
					sizeof(ucb_ts));
	if (err)
		goto err3;
	err = platform_device_add(ucb->ucb1400_ts);
	if (err)
		goto err3;

	return 0;

err3:
	platform_device_put(ucb->ucb1400_ts);
err2:
	platform_device_unregister(ucb->ucb1400_gpio);
err1:
	platform_device_put(ucb->ucb1400_gpio);
err0:
	kfree(ucb);
err:
	return err;
}

static int ucb1400_core_remove(struct device *dev)
{
	struct ucb1400 *ucb = dev_get_drvdata(dev);

	platform_device_unregister(ucb->ucb1400_ts);
	platform_device_unregister(ucb->ucb1400_gpio);

	kfree(ucb);
	return 0;
}

static struct device_driver ucb1400_core_driver = {
	.name	= "ucb1400_core",
	.bus	= &ac97_bus_type,
	.probe	= ucb1400_core_probe,
	.remove	= ucb1400_core_remove,
};

static int __init ucb1400_core_init(void)
{
	return driver_register(&ucb1400_core_driver);
}

static void __exit ucb1400_core_exit(void)
{
	driver_unregister(&ucb1400_core_driver);
}

module_init(ucb1400_core_init);
module_exit(ucb1400_core_exit);

MODULE_DESCRIPTION("Philips UCB1400 driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
d9105c2b MV	1	/*
	2	* Core functions for:
	3	* Philips UCB1400 multifunction chip
	4	*
	5	* Based on ucb1400_ts.c:
	6	* Author: Nicolas Pitre
	7	* Created: September 25, 2006
	8	* Copyright: MontaVista Software, Inc.
	9	*
	10	* Spliting done by: Marek Vasut <marek.vasut@gmail.com>
	11	* If something doesnt work and it worked before spliting, e-mail me,
	12	* dont bother Nicolas please ;-)
	13	*
	14	* This program is free software; you can redistribute it and/or modify
	15	* it under the terms of the GNU General Public License version 2 as
	16	* published by the Free Software Foundation.
	17	*
	18	* This code is heavily based on ucb1x00-*.c copyrighted by Russell King
	19	* covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has
	20	* been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
	21	*/
	22
	23	#include <linux/module.h>
	24	#include <linux/ucb1400.h>
	25
cbf806dd SAS	26	unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
	27	int adcsync)
	28	{
	29	unsigned int val;
	30
	31	if (adcsync)
	32	adc_channel \|= UCB_ADC_SYNC_ENA;
	33
	34	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA \| adc_channel);
	35	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA \| adc_channel \|
	36	UCB_ADC_START);
	37
	38	while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA))
	39	& UCB_ADC_DAT_VALID))
	40	schedule_timeout_uninterruptible(1);
	41
	42	return val & UCB_ADC_DAT_MASK;
	43	}
	44	EXPORT_SYMBOL_GPL(ucb1400_adc_read);
	45
d9105c2b MV	46	static int ucb1400_core_probe(struct device *dev)
	47	{
	48	int err;
	49	struct ucb1400 *ucb;
	50	struct ucb1400_ts ucb_ts;
4cf8e53b	51	struct ucb1400_gpio ucb_gpio;
d9105c2b MV	52	struct snd_ac97 *ac97;
	53
	54	memset(&ucb_ts, 0, sizeof(ucb_ts));
4cf8e53b	55	memset(&ucb_gpio, 0, sizeof(ucb_gpio));
d9105c2b MV	56
	57	ucb = kzalloc(sizeof(struct ucb1400), GFP_KERNEL);
	58	if (!ucb) {
	59	err = -ENOMEM;
	60	goto err;
	61	}
	62
	63	dev_set_drvdata(dev, ucb);
	64
	65	ac97 = to_ac97_t(dev);
	66
	67	ucb_ts.id = ucb1400_reg_read(ac97, UCB_ID);
	68	if (ucb_ts.id != UCB_ID_1400) {
	69	err = -ENODEV;
	70	goto err0;
	71	}
	72
4cf8e53b MV	73	/* GPIO */
	74	ucb_gpio.ac97 = ac97;
	75	ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1);
	76	if (!ucb->ucb1400_gpio) {
	77	err = -ENOMEM;
	78	goto err0;
	79	}
	80	err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio,
	81	sizeof(ucb_gpio));
	82	if (err)
	83	goto err1;
	84	err = platform_device_add(ucb->ucb1400_gpio);
	85	if (err)
	86	goto err1;
	87
d9105c2b MV	88	/* TOUCHSCREEN */
	89	ucb_ts.ac97 = ac97;
	90	ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
	91	if (!ucb->ucb1400_ts) {
	92	err = -ENOMEM;
4cf8e53b	93	goto err2;
d9105c2b MV	94	}
	95	err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
	96	sizeof(ucb_ts));
	97	if (err)
4cf8e53b	98	goto err3;
d9105c2b MV	99	err = platform_device_add(ucb->ucb1400_ts);
d9105c2b MV	100	if (err)
4cf8e53b	101	goto err3;
d9105c2b MV	102
	103	return 0;
	104
4cf8e53b	105	err3:
d9105c2b	106	platform_device_put(ucb->ucb1400_ts);
4cf8e53b MV	107	err2:
	108	platform_device_unregister(ucb->ucb1400_gpio);
	109	err1:
	110	platform_device_put(ucb->ucb1400_gpio);
d9105c2b MV	111	err0:
	112	kfree(ucb);
	113	err:
	114	return err;
	115	}
	116
	117	static int ucb1400_core_remove(struct device *dev)
	118	{
	119	struct ucb1400 *ucb = dev_get_drvdata(dev);
	120
	121	platform_device_unregister(ucb->ucb1400_ts);
4cf8e53b MV	122	platform_device_unregister(ucb->ucb1400_gpio);
4cf8e53b MV	123
d9105c2b MV	124	kfree(ucb);
	125	return 0;
	126	}
	127
	128	static struct device_driver ucb1400_core_driver = {
	129	.name = "ucb1400_core",
	130	.bus = &ac97_bus_type,
	131	.probe = ucb1400_core_probe,
	132	.remove = ucb1400_core_remove,
	133	};
	134
	135	static int __init ucb1400_core_init(void)
	136	{
	137	return driver_register(&ucb1400_core_driver);
	138	}
	139
	140	static void __exit ucb1400_core_exit(void)
	141	{
	142	driver_unregister(&ucb1400_core_driver);
	143	}
	144
	145	module_init(ucb1400_core_init);
	146	module_exit(ucb1400_core_exit);
	147
	148	MODULE_DESCRIPTION("Philips UCB1400 driver");
	149	MODULE_LICENSE("GPL");