[mirror_ubuntu-hirsute-kernel.git] / drivers / mfd / ucb1400_core.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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 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;
	}

	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;
	if (pdata) {
		ucb_gpio.gpio_setup = pdata->gpio_setup;
		ucb_gpio.gpio_teardown = pdata->gpio_teardown;
		ucb_gpio.gpio_offset = pdata->gpio_offset;
	}
	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;

	if (pdata != NULL && pdata->irq >= 0)
		ucb_ts.irq = pdata->irq;
	else
		ucb_ts.irq = -1;

	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_del(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
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
d9105c2b MV	2	/*
	3	* Core functions for:
	4	* Philips UCB1400 multifunction chip
	5	*
	6	* Based on ucb1400_ts.c:
	7	* Author: Nicolas Pitre
	8	* Created: September 25, 2006
	9	* Copyright: MontaVista Software, Inc.
	10	*
	11	* Spliting done by: Marek Vasut <marek.vasut@gmail.com>
25985edc	12	* If something doesn't work and it worked before spliting, e-mail me,
d9105c2b MV	13	* dont bother Nicolas please ;-)
d9105c2b MV	14	*
d9105c2b MV	15	* This code is heavily based on ucb1x00-*.c copyrighted by Russell King
	16	* covering the UCB1100, UCB1200 and UCB1300.. Support for the UCB1400 has
	17	* been made separate from ucb1x00-core/ucb1x00-ts on Russell's request.
	18	*/
	19
	20	#include <linux/module.h>
a99bbaf5	21	#include <linux/sched.h>
5a0e3ad6	22	#include <linux/slab.h>
d9105c2b MV	23	#include <linux/ucb1400.h>
d9105c2b MV	24
cbf806dd SAS	25	unsigned int ucb1400_adc_read(struct snd_ac97 *ac97, u16 adc_channel,
	26	int adcsync)
	27	{
	28	unsigned int val;
	29
	30	if (adcsync)
	31	adc_channel \|= UCB_ADC_SYNC_ENA;
	32
	33	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA \| adc_channel);
	34	ucb1400_reg_write(ac97, UCB_ADC_CR, UCB_ADC_ENA \| adc_channel \|
	35	UCB_ADC_START);
	36
	37	while (!((val = ucb1400_reg_read(ac97, UCB_ADC_DATA))
	38	& UCB_ADC_DAT_VALID))
	39	schedule_timeout_uninterruptible(1);
	40
	41	return val & UCB_ADC_DAT_MASK;
	42	}
	43	EXPORT_SYMBOL_GPL(ucb1400_adc_read);
	44
d9105c2b MV	45	static int ucb1400_core_probe(struct device *dev)
	46	{
	47	int err;
	48	struct ucb1400 *ucb;
	49	struct ucb1400_ts ucb_ts;
4cf8e53b	50	struct ucb1400_gpio ucb_gpio;
d9105c2b	51	struct snd_ac97 *ac97;
334a41ce	52	struct ucb1400_pdata *pdata = dev_get_platdata(dev);
d9105c2b MV	53
d9105c2b MV	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 */
4cf8e53b MV	74	ucb_gpio.ac97 = ac97;
360e64d8 MV	75	if (pdata) {
	76	ucb_gpio.gpio_setup = pdata->gpio_setup;
	77	ucb_gpio.gpio_teardown = pdata->gpio_teardown;
	78	ucb_gpio.gpio_offset = pdata->gpio_offset;
	79	}
4cf8e53b MV	80	ucb->ucb1400_gpio = platform_device_alloc("ucb1400_gpio", -1);
	81	if (!ucb->ucb1400_gpio) {
	82	err = -ENOMEM;
	83	goto err0;
	84	}
	85	err = platform_device_add_data(ucb->ucb1400_gpio, &ucb_gpio,
	86	sizeof(ucb_gpio));
	87	if (err)
	88	goto err1;
	89	err = platform_device_add(ucb->ucb1400_gpio);
	90	if (err)
	91	goto err1;
	92
d9105c2b MV	93	/* TOUCHSCREEN */
d9105c2b MV	94	ucb_ts.ac97 = ac97;
fb141597 MV	95
	96	if (pdata != NULL && pdata->irq >= 0)
	97	ucb_ts.irq = pdata->irq;
	98	else
	99	ucb_ts.irq = -1;
	100
d9105c2b MV	101	ucb->ucb1400_ts = platform_device_alloc("ucb1400_ts", -1);
	102	if (!ucb->ucb1400_ts) {
	103	err = -ENOMEM;
4cf8e53b	104	goto err2;
d9105c2b MV	105	}
	106	err = platform_device_add_data(ucb->ucb1400_ts, &ucb_ts,
	107	sizeof(ucb_ts));
	108	if (err)
4cf8e53b	109	goto err3;
d9105c2b MV	110	err = platform_device_add(ucb->ucb1400_ts);
d9105c2b MV	111	if (err)
4cf8e53b	112	goto err3;
d9105c2b MV	113
	114	return 0;
	115
4cf8e53b	116	err3:
d9105c2b	117	platform_device_put(ucb->ucb1400_ts);
4cf8e53b	118	err2:
ef256176	119	platform_device_del(ucb->ucb1400_gpio);
4cf8e53b MV	120	err1:
4cf8e53b MV	121	platform_device_put(ucb->ucb1400_gpio);
d9105c2b MV	122	err0:
	123	kfree(ucb);
	124	err:
	125	return err;
	126	}
	127
	128	static int ucb1400_core_remove(struct device *dev)
	129	{
	130	struct ucb1400 *ucb = dev_get_drvdata(dev);
	131
	132	platform_device_unregister(ucb->ucb1400_ts);
4cf8e53b MV	133	platform_device_unregister(ucb->ucb1400_gpio);
4cf8e53b MV	134
d9105c2b MV	135	kfree(ucb);
	136	return 0;
	137	}
	138
	139	static struct device_driver ucb1400_core_driver = {
	140	.name = "ucb1400_core",
	141	.bus = &ac97_bus_type,
	142	.probe = ucb1400_core_probe,
	143	.remove = ucb1400_core_remove,
	144	};
	145
	146	static int __init ucb1400_core_init(void)
	147	{
	148	return driver_register(&ucb1400_core_driver);
	149	}
	150
	151	static void __exit ucb1400_core_exit(void)
	152	{
	153	driver_unregister(&ucb1400_core_driver);
	154	}
	155
	156	module_init(ucb1400_core_init);
	157	module_exit(ucb1400_core_exit);
	158
	159	MODULE_DESCRIPTION("Philips UCB1400 driver");
	160	MODULE_LICENSE("GPL");