[mirror_ubuntu-hirsute-kernel.git] / drivers / mfd / twl6040-core.c

/*
 * MFD driver for TWL6040 audio device
 *
 * Authors:	Misael Lopez Cruz <misael.lopez@ti.com>
 *		Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
 *		Peter Ujfalusi <peter.ujfalusi@ti.com>
 *
 * Copyright:	(C) 2011 Texas Instruments, Inc.
 *
 * 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 program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/i2c/twl.h>
#include <linux/mfd/core.h>
#include <linux/mfd/twl6040.h>

int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
{
	int ret;
	u8 val = 0;

	mutex_lock(&twl6040->io_mutex);
	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	if (ret < 0) {
		mutex_unlock(&twl6040->io_mutex);
		return ret;
	}
	mutex_unlock(&twl6040->io_mutex);

	return val;
}
EXPORT_SYMBOL(twl6040_reg_read);

int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
{
	int ret;

	mutex_lock(&twl6040->io_mutex);
	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	mutex_unlock(&twl6040->io_mutex);

	return ret;
}
EXPORT_SYMBOL(twl6040_reg_write);

int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
{
	int ret;
	u8 val;

	mutex_lock(&twl6040->io_mutex);
	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	if (ret)
		goto out;

	val |= mask;
	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
out:
	mutex_unlock(&twl6040->io_mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_set_bits);

int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
{
	int ret;
	u8 val;

	mutex_lock(&twl6040->io_mutex);
	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	if (ret)
		goto out;

	val &= ~mask;
	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
out:
	mutex_unlock(&twl6040->io_mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_clear_bits);

/* twl6040 codec manual power-up sequence */
static int twl6040_power_up(struct twl6040 *twl6040)
{
	u8 ldoctl, ncpctl, lppllctl;
	int ret;

	/* enable high-side LDO, reference system and internal oscillator */
	ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		return ret;
	usleep_range(10000, 10500);

	/* enable negative charge pump */
	ncpctl = TWL6040_NCPENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
	if (ret)
		goto ncp_err;
	usleep_range(1000, 1500);

	/* enable low-side LDO */
	ldoctl |= TWL6040_LSLDOENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		goto lsldo_err;
	usleep_range(1000, 1500);

	/* enable low-power PLL */
	lppllctl = TWL6040_LPLLENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	if (ret)
		goto lppll_err;
	usleep_range(5000, 5500);

	/* disable internal oscillator */
	ldoctl &= ~TWL6040_OSCENA;
	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	if (ret)
		goto osc_err;

	return 0;

osc_err:
	lppllctl &= ~TWL6040_LPLLENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
lppll_err:
	ldoctl &= ~TWL6040_LSLDOENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
lsldo_err:
	ncpctl &= ~TWL6040_NCPENA;
	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
ncp_err:
	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);

	return ret;
}

/* twl6040 manual power-down sequence */
static void twl6040_power_down(struct twl6040 *twl6040)
{
	u8 ncpctl, ldoctl, lppllctl;

	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);

	/* enable internal oscillator */
	ldoctl |= TWL6040_OSCENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	usleep_range(1000, 1500);

	/* disable low-power PLL */
	lppllctl &= ~TWL6040_LPLLENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);

	/* disable low-side LDO */
	ldoctl &= ~TWL6040_LSLDOENA;
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);

	/* disable negative charge pump */
	ncpctl &= ~TWL6040_NCPENA;
	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);

	/* disable high-side LDO, reference system and internal oscillator */
	ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
}

static irqreturn_t twl6040_naudint_handler(int irq, void *data)
{
	struct twl6040 *twl6040 = data;
	u8 intid, status;

	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);

	if (intid & TWL6040_READYINT)
		complete(&twl6040->ready);

	if (intid & TWL6040_THINT) {
		status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
		if (status & TWL6040_TSHUTDET) {
			dev_warn(twl6040->dev,
				 "Thermal shutdown, powering-off");
			twl6040_power(twl6040, 0);
		} else {
			dev_warn(twl6040->dev,
				 "Leaving thermal shutdown, powering-on");
			twl6040_power(twl6040, 1);
		}
	}

	return IRQ_HANDLED;
}

static int twl6040_power_up_completion(struct twl6040 *twl6040,
				       int naudint)
{
	int time_left;
	u8 intid;

	time_left = wait_for_completion_timeout(&twl6040->ready,
						msecs_to_jiffies(144));
	if (!time_left) {
		intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
		if (!(intid & TWL6040_READYINT)) {
			dev_err(twl6040->dev,
				"timeout waiting for READYINT\n");
			return -ETIMEDOUT;
		}
	}

	return 0;
}

int twl6040_power(struct twl6040 *twl6040, int on)
{
	int audpwron = twl6040->audpwron;
	int naudint = twl6040->irq;
	int ret = 0;

	mutex_lock(&twl6040->mutex);

	if (on) {
		/* already powered-up */
		if (twl6040->power_count++)
			goto out;

		if (gpio_is_valid(audpwron)) {
			/* use AUDPWRON line */
			gpio_set_value(audpwron, 1);
			/* wait for power-up completion */
			ret = twl6040_power_up_completion(twl6040, naudint);
			if (ret) {
				dev_err(twl6040->dev,
					"automatic power-down failed\n");
				twl6040->power_count = 0;
				goto out;
			}
		} else {
			/* use manual power-up sequence */
			ret = twl6040_power_up(twl6040);
			if (ret) {
				dev_err(twl6040->dev,
					"manual power-up failed\n");
				twl6040->power_count = 0;
				goto out;
			}
		}
		/* Default PLL configuration after power up */
		twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
		twl6040->sysclk = 19200000;
	} else {
		/* already powered-down */
		if (!twl6040->power_count) {
			dev_err(twl6040->dev,
				"device is already powered-off\n");
			ret = -EPERM;
			goto out;
		}

		if (--twl6040->power_count)
			goto out;

		if (gpio_is_valid(audpwron)) {
			/* use AUDPWRON line */
			gpio_set_value(audpwron, 0);

			/* power-down sequence latency */
			usleep_range(500, 700);
		} else {
			/* use manual power-down sequence */
			twl6040_power_down(twl6040);
		}
		twl6040->sysclk = 0;
	}

out:
	mutex_unlock(&twl6040->mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_power);

int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
		    unsigned int freq_in, unsigned int freq_out)
{
	u8 hppllctl, lppllctl;
	int ret = 0;

	mutex_lock(&twl6040->mutex);

	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);

	switch (pll_id) {
	case TWL6040_SYSCLK_SEL_LPPLL:
		/* low-power PLL divider */
		switch (freq_out) {
		case 17640000:
			lppllctl |= TWL6040_LPLLFIN;
			break;
		case 19200000:
			lppllctl &= ~TWL6040_LPLLFIN;
			break;
		default:
			dev_err(twl6040->dev,
				"freq_out %d not supported\n", freq_out);
			ret = -EINVAL;
			goto pll_out;
		}
		twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);

		switch (freq_in) {
		case 32768:
			lppllctl |= TWL6040_LPLLENA;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
			mdelay(5);
			lppllctl &= ~TWL6040_HPLLSEL;
			twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
					  lppllctl);
			hppllctl &= ~TWL6040_HPLLENA;
			twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
					  hppllctl);
			break;
		default:
			dev_err(twl6040->dev,
				"freq_in %d not supported\n", freq_in);
			ret = -EINVAL;
			goto pll_out;
		}
		break;
	case TWL6040_SYSCLK_SEL_HPPLL:
		/* high-performance PLL can provide only 19.2 MHz */
		if (freq_out != 19200000) {
			dev_err(twl6040->dev,
				"freq_out %d not supported\n", freq_out);
			ret = -EINVAL;
			goto pll_out;
		}

		hppllctl &= ~TWL6040_MCLK_MSK;

		switch (freq_in) {
		case 12000000:
			/* PLL enabled, active mode */
			hppllctl |= TWL6040_MCLK_12000KHZ |
				    TWL6040_HPLLENA;
			break;
		case 19200000:
			/*
			 * PLL disabled
			 * (enable PLL if MCLK jitter quality
			 *  doesn't meet specification)
			 */
			hppllctl |= TWL6040_MCLK_19200KHZ;
			break;
		case 26000000:
			/* PLL enabled, active mode */
			hppllctl |= TWL6040_MCLK_26000KHZ |
				    TWL6040_HPLLENA;
			break;
		case 38400000:
			/* PLL enabled, active mode */
			hppllctl |= TWL6040_MCLK_38400KHZ |
				    TWL6040_HPLLENA;
			break;
		default:
			dev_err(twl6040->dev,
				"freq_in %d not supported\n", freq_in);
			ret = -EINVAL;
			goto pll_out;
		}

		/* enable clock slicer to ensure input waveform is square */
		hppllctl |= TWL6040_HPLLSQRENA;

		twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl);
		usleep_range(500, 700);
		lppllctl |= TWL6040_HPLLSEL;
		twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
		lppllctl &= ~TWL6040_LPLLENA;
		twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
		break;
	default:
		dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
		ret = -EINVAL;
		goto pll_out;
	}

	twl6040->sysclk = freq_out;
	twl6040->pll = pll_id;

pll_out:
	mutex_unlock(&twl6040->mutex);
	return ret;
}
EXPORT_SYMBOL(twl6040_set_pll);

int twl6040_get_pll(struct twl6040 *twl6040)
{
	if (twl6040->power_count)
		return twl6040->pll;
	else
		return -ENODEV;
}
EXPORT_SYMBOL(twl6040_get_pll);

unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
{
	return twl6040->sysclk;
}
EXPORT_SYMBOL(twl6040_get_sysclk);

static struct resource twl6040_vibra_rsrc[] = {
	{
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource twl6040_codec_rsrc[] = {
	{
		.flags = IORESOURCE_IRQ,
	},
};

static int __devinit twl6040_probe(struct platform_device *pdev)
{
	struct twl4030_audio_data *pdata = pdev->dev.platform_data;
	struct twl6040 *twl6040;
	struct mfd_cell *cell = NULL;
	int ret, children = 0;

	if (!pdata) {
		dev_err(&pdev->dev, "Platform data is missing\n");
		return -EINVAL;
	}

	/* In order to operate correctly we need valid interrupt config */
	if (!pdata->naudint_irq || !pdata->irq_base) {
		dev_err(&pdev->dev, "Invalid IRQ configuration\n");
		return -EINVAL;
	}

	twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL);
	if (!twl6040)
		return -ENOMEM;

	platform_set_drvdata(pdev, twl6040);

	twl6040->dev = &pdev->dev;
	twl6040->audpwron = pdata->audpwron_gpio;
	twl6040->irq = pdata->naudint_irq;
	twl6040->irq_base = pdata->irq_base;

	mutex_init(&twl6040->mutex);
	mutex_init(&twl6040->io_mutex);
	init_completion(&twl6040->ready);

	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);

	if (gpio_is_valid(twl6040->audpwron)) {
		ret = gpio_request(twl6040->audpwron, "audpwron");
		if (ret)
			goto gpio1_err;

		ret = gpio_direction_output(twl6040->audpwron, 0);
		if (ret)
			goto gpio2_err;
	}

	/* ERRATA: Automatic power-up is not possible in ES1.0 */
	if (twl6040_get_revid(twl6040) == TWL6040_REV_ES1_0)
		twl6040->audpwron = -EINVAL;

	/* codec interrupt */
	ret = twl6040_irq_init(twl6040);
	if (ret)
		goto gpio2_err;

	ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
				   NULL, twl6040_naudint_handler, 0,
				   "twl6040_irq_ready", twl6040);
	if (ret) {
		dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
			ret);
		goto irq_err;
	}

	/* dual-access registers controlled by I2C only */
	twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);

	if (pdata->codec) {
		int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;

		cell = &twl6040->cells[children];
		cell->name = "twl6040-codec";
		twl6040_codec_rsrc[0].start = irq;
		twl6040_codec_rsrc[0].end = irq;
		cell->resources = twl6040_codec_rsrc;
		cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
		cell->platform_data = pdata->codec;
		cell->pdata_size = sizeof(*pdata->codec);
		children++;
	}

	if (pdata->vibra) {
		int irq = twl6040->irq_base + TWL6040_IRQ_VIB;

		cell = &twl6040->cells[children];
		cell->name = "twl6040-vibra";
		twl6040_vibra_rsrc[0].start = irq;
		twl6040_vibra_rsrc[0].end = irq;
		cell->resources = twl6040_vibra_rsrc;
		cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);

		cell->platform_data = pdata->vibra;
		cell->pdata_size = sizeof(*pdata->vibra);
		children++;
	}

	if (children) {
		ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells,
				      children, NULL, 0);
		if (ret)
			goto mfd_err;
	} else {
		dev_err(&pdev->dev, "No platform data found for children\n");
		ret = -ENODEV;
		goto mfd_err;
	}

	return 0;

mfd_err:
	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
irq_err:
	twl6040_irq_exit(twl6040);
gpio2_err:
	if (gpio_is_valid(twl6040->audpwron))
		gpio_free(twl6040->audpwron);
gpio1_err:
	platform_set_drvdata(pdev, NULL);
	kfree(twl6040);
	return ret;
}

static int __devexit twl6040_remove(struct platform_device *pdev)
{
	struct twl6040 *twl6040 = platform_get_drvdata(pdev);

	if (twl6040->power_count)
		twl6040_power(twl6040, 0);

	if (gpio_is_valid(twl6040->audpwron))
		gpio_free(twl6040->audpwron);

	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
	twl6040_irq_exit(twl6040);

	mfd_remove_devices(&pdev->dev);
	platform_set_drvdata(pdev, NULL);
	kfree(twl6040);

	return 0;
}

static struct platform_driver twl6040_driver = {
	.probe		= twl6040_probe,
	.remove		= __devexit_p(twl6040_remove),
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= "twl6040",
	},
};

static int __devinit twl6040_init(void)
{
	return platform_driver_register(&twl6040_driver);
}
module_init(twl6040_init);

static void __devexit twl6040_exit(void)
{
	platform_driver_unregister(&twl6040_driver);
}

module_exit(twl6040_exit);

MODULE_DESCRIPTION("TWL6040 MFD");
MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:twl6040");
Commit	Line	Data
f19b2823 MLC	1	/*
	2	* MFD driver for TWL6040 audio device
	3	*
	4	* Authors: Misael Lopez Cruz <misael.lopez@ti.com>
	5	* Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
	6	* Peter Ujfalusi <peter.ujfalusi@ti.com>
	7	*
	8	* Copyright: (C) 2011 Texas Instruments, Inc.
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License
	20	* along with this program; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	22	* 02110-1301 USA
	23	*
	24	*/
	25
	26	#include <linux/module.h>
	27	#include <linux/types.h>
	28	#include <linux/slab.h>
	29	#include <linux/kernel.h>
	30	#include <linux/platform_device.h>
	31	#include <linux/gpio.h>
	32	#include <linux/delay.h>
	33	#include <linux/i2c/twl.h>
	34	#include <linux/mfd/core.h>
	35	#include <linux/mfd/twl6040.h>
	36
f19b2823 MLC	37	int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
	38	{
	39	int ret;
	40	u8 val = 0;
	41
	42	mutex_lock(&twl6040->io_mutex);
	43	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	44	if (ret < 0) {
	45	mutex_unlock(&twl6040->io_mutex);
	46	return ret;
	47	}
	48	mutex_unlock(&twl6040->io_mutex);
	49
	50	return val;
	51	}
	52	EXPORT_SYMBOL(twl6040_reg_read);
	53
	54	int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
	55	{
	56	int ret;
	57
	58	mutex_lock(&twl6040->io_mutex);
	59	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	60	mutex_unlock(&twl6040->io_mutex);
	61
	62	return ret;
	63	}
	64	EXPORT_SYMBOL(twl6040_reg_write);
	65
	66	int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	67	{
	68	int ret;
	69	u8 val;
	70
	71	mutex_lock(&twl6040->io_mutex);
	72	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	73	if (ret)
	74	goto out;
	75
	76	val \|= mask;
	77	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	78	out:
	79	mutex_unlock(&twl6040->io_mutex);
	80	return ret;
	81	}
	82	EXPORT_SYMBOL(twl6040_set_bits);
	83
	84	int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	85	{
	86	int ret;
	87	u8 val;
	88
	89	mutex_lock(&twl6040->io_mutex);
	90	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	91	if (ret)
	92	goto out;
	93
	94	val &= ~mask;
	95	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	96	out:
	97	mutex_unlock(&twl6040->io_mutex);
	98	return ret;
	99	}
	100	EXPORT_SYMBOL(twl6040_clear_bits);
101
102	/* twl6040 codec manual power-up sequence */
103	static int twl6040_power_up(struct twl6040 *twl6040)
104	{
105	u8 ldoctl, ncpctl, lppllctl;
106	int ret;
107
108	/* enable high-side LDO, reference system and internal oscillator */
109	ldoctl = TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA;
110	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
111	if (ret)
112	return ret;
113	usleep_range(10000, 10500);
114
115	/* enable negative charge pump */
116	ncpctl = TWL6040_NCPENA;
117	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
118	if (ret)
119	goto ncp_err;
120	usleep_range(1000, 1500);
121
122	/* enable low-side LDO */
123	ldoctl \|= TWL6040_LSLDOENA;
124	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
125	if (ret)
126	goto lsldo_err;
127	usleep_range(1000, 1500);
128
129	/* enable low-power PLL */
130	lppllctl = TWL6040_LPLLENA;
131	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
132	if (ret)
133	goto lppll_err;
134	usleep_range(5000, 5500);
135
136	/* disable internal oscillator */
137	ldoctl &= ~TWL6040_OSCENA;
138	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
139	if (ret)
140	goto osc_err;
141
142	return 0;
143
144	osc_err:
145	lppllctl &= ~TWL6040_LPLLENA;
146	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
147	lppll_err:
148	ldoctl &= ~TWL6040_LSLDOENA;
149	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
150	lsldo_err:
151	ncpctl &= ~TWL6040_NCPENA;
152	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
153	ncp_err:
154	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
155	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
156
157	return ret;
158	}
159
160	/* twl6040 manual power-down sequence */
161	static void twl6040_power_down(struct twl6040 *twl6040)
162	{
163	u8 ncpctl, ldoctl, lppllctl;
164
165	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
166	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
167	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
168
169	/* enable internal oscillator */
170	ldoctl \|= TWL6040_OSCENA;
171	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
172	usleep_range(1000, 1500);
173
174	/* disable low-power PLL */
175	lppllctl &= ~TWL6040_LPLLENA;
176	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
177
178	/* disable low-side LDO */
179	ldoctl &= ~TWL6040_LSLDOENA;
180	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
181
182	/* disable negative charge pump */
183	ncpctl &= ~TWL6040_NCPENA;
184	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
185
186	/* disable high-side LDO, reference system and internal oscillator */
187	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
188	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
189	}
190
191	static irqreturn_t twl6040_naudint_handler(int irq, void *data)
192	{
193	struct twl6040 *twl6040 = data;
194	u8 intid, status;
195
196	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
197
198	if (intid & TWL6040_READYINT)
199	complete(&twl6040->ready);
200
201	if (intid & TWL6040_THINT) {
202	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
203	if (status & TWL6040_TSHUTDET) {
2d7c957e	204	dev_warn(twl6040->dev,
f19b2823 MLC	205	"Thermal shutdown, powering-off");
	206	twl6040_power(twl6040, 0);
	207	} else {
2d7c957e	208	dev_warn(twl6040->dev,
f19b2823 MLC	209	"Leaving thermal shutdown, powering-on");
	210	twl6040_power(twl6040, 1);
	211	}
	212	}
	213
	214	return IRQ_HANDLED;
	215	}
	216
	217	static int twl6040_power_up_completion(struct twl6040 *twl6040,
	218	int naudint)
	219	{
	220	int time_left;
	221	u8 intid;
	222
	223	time_left = wait_for_completion_timeout(&twl6040->ready,
	224	msecs_to_jiffies(144));
	225	if (!time_left) {
	226	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
	227	if (!(intid & TWL6040_READYINT)) {
2d7c957e	228	dev_err(twl6040->dev,
f19b2823 MLC	229	"timeout waiting for READYINT\n");
	230	return -ETIMEDOUT;
	231	}
	232	}
	233
	234	return 0;
	235	}
	236
	237	int twl6040_power(struct twl6040 *twl6040, int on)
	238	{
	239	int audpwron = twl6040->audpwron;
	240	int naudint = twl6040->irq;
	241	int ret = 0;
	242
	243	mutex_lock(&twl6040->mutex);
	244
	245	if (on) {
	246	/* already powered-up */
	247	if (twl6040->power_count++)
	248	goto out;
	249
	250	if (gpio_is_valid(audpwron)) {
	251	/* use AUDPWRON line */
	252	gpio_set_value(audpwron, 1);
	253	/* wait for power-up completion */
	254	ret = twl6040_power_up_completion(twl6040, naudint);
	255	if (ret) {
2d7c957e	256	dev_err(twl6040->dev,
f19b2823 MLC	257	"automatic power-down failed\n");
	258	twl6040->power_count = 0;
	259	goto out;
	260	}
	261	} else {
	262	/* use manual power-up sequence */
	263	ret = twl6040_power_up(twl6040);
	264	if (ret) {
2d7c957e	265	dev_err(twl6040->dev,
f19b2823 MLC	266	"manual power-up failed\n");
	267	twl6040->power_count = 0;
	268	goto out;
	269	}
	270	}
cfb7a33b PU	271	/* Default PLL configuration after power up */
cfb7a33b PU	272	twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
f19b2823 MLC	273	twl6040->sysclk = 19200000;
	274	} else {
	275	/* already powered-down */
	276	if (!twl6040->power_count) {
2d7c957e	277	dev_err(twl6040->dev,
f19b2823 MLC	278	"device is already powered-off\n");
	279	ret = -EPERM;
	280	goto out;
	281	}
	282
	283	if (--twl6040->power_count)
	284	goto out;
	285
	286	if (gpio_is_valid(audpwron)) {
	287	/* use AUDPWRON line */
	288	gpio_set_value(audpwron, 0);
	289
	290	/* power-down sequence latency */
	291	usleep_range(500, 700);
	292	} else {
	293	/* use manual power-down sequence */
	294	twl6040_power_down(twl6040);
	295	}
f19b2823 MLC	296	twl6040->sysclk = 0;
	297	}
	298
	299	out:
	300	mutex_unlock(&twl6040->mutex);
	301	return ret;
	302	}
	303	EXPORT_SYMBOL(twl6040_power);
	304
cfb7a33b	305	int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
f19b2823 MLC	306	unsigned int freq_in, unsigned int freq_out)
	307	{
	308	u8 hppllctl, lppllctl;
	309	int ret = 0;
	310
	311	mutex_lock(&twl6040->mutex);
	312
	313	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
	314	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
	315
cfb7a33b PU	316	switch (pll_id) {
cfb7a33b PU	317	case TWL6040_SYSCLK_SEL_LPPLL:
f19b2823 MLC	318	/* low-power PLL divider */
	319	switch (freq_out) {
	320	case 17640000:
	321	lppllctl \|= TWL6040_LPLLFIN;
	322	break;
	323	case 19200000:
	324	lppllctl &= ~TWL6040_LPLLFIN;
	325	break;
	326	default:
2d7c957e	327	dev_err(twl6040->dev,
f19b2823 MLC	328	"freq_out %d not supported\n", freq_out);
	329	ret = -EINVAL;
	330	goto pll_out;
	331	}
	332	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	333
	334	switch (freq_in) {
	335	case 32768:
	336	lppllctl \|= TWL6040_LPLLENA;
	337	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	338	lppllctl);
	339	mdelay(5);
	340	lppllctl &= ~TWL6040_HPLLSEL;
	341	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	342	lppllctl);
	343	hppllctl &= ~TWL6040_HPLLENA;
	344	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
	345	hppllctl);
	346	break;
	347	default:
2d7c957e	348	dev_err(twl6040->dev,
f19b2823 MLC	349	"freq_in %d not supported\n", freq_in);
	350	ret = -EINVAL;
	351	goto pll_out;
	352	}
f19b2823	353	break;
cfb7a33b	354	case TWL6040_SYSCLK_SEL_HPPLL:
f19b2823 MLC	355	/* high-performance PLL can provide only 19.2 MHz */
f19b2823 MLC	356	if (freq_out != 19200000) {
2d7c957e	357	dev_err(twl6040->dev,
f19b2823 MLC	358	"freq_out %d not supported\n", freq_out);
	359	ret = -EINVAL;
	360	goto pll_out;
	361	}
	362
	363	hppllctl &= ~TWL6040_MCLK_MSK;
	364
	365	switch (freq_in) {
	366	case 12000000:
	367	/* PLL enabled, active mode */
	368	hppllctl \|= TWL6040_MCLK_12000KHZ \|
	369	TWL6040_HPLLENA;
	370	break;
	371	case 19200000:
	372	/*
	373	* PLL disabled
	374	* (enable PLL if MCLK jitter quality
	375	* doesn't meet specification)
	376	*/
	377	hppllctl \|= TWL6040_MCLK_19200KHZ;
	378	break;
	379	case 26000000:
	380	/* PLL enabled, active mode */
	381	hppllctl \|= TWL6040_MCLK_26000KHZ \|
	382	TWL6040_HPLLENA;
	383	break;
	384	case 38400000:
	385	/* PLL enabled, active mode */
	386	hppllctl \|= TWL6040_MCLK_38400KHZ \|
	387	TWL6040_HPLLENA;
	388	break;
	389	default:
2d7c957e	390	dev_err(twl6040->dev,
f19b2823 MLC	391	"freq_in %d not supported\n", freq_in);
	392	ret = -EINVAL;
	393	goto pll_out;
	394	}
	395
	396	/* enable clock slicer to ensure input waveform is square */
	397	hppllctl \|= TWL6040_HPLLSQRENA;
	398
	399	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL, hppllctl);
	400	usleep_range(500, 700);
	401	lppllctl \|= TWL6040_HPLLSEL;
	402	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
	403	lppllctl &= ~TWL6040_LPLLENA;
	404	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
f19b2823 MLC	405	break;
f19b2823 MLC	406	default:
2d7c957e	407	dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
f19b2823 MLC	408	ret = -EINVAL;
	409	goto pll_out;
	410	}
	411
	412	twl6040->sysclk = freq_out;
cfb7a33b	413	twl6040->pll = pll_id;
f19b2823 MLC	414
	415	pll_out:
	416	mutex_unlock(&twl6040->mutex);
	417	return ret;
	418	}
	419	EXPORT_SYMBOL(twl6040_set_pll);
	420
cfb7a33b	421	int twl6040_get_pll(struct twl6040 *twl6040)
f19b2823	422	{
cfb7a33b PU	423	if (twl6040->power_count)
	424	return twl6040->pll;
	425	else
	426	return -ENODEV;
f19b2823 MLC	427	}
	428	EXPORT_SYMBOL(twl6040_get_pll);
	429
	430	unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
	431	{
	432	return twl6040->sysclk;
	433	}
	434	EXPORT_SYMBOL(twl6040_get_sysclk);
	435
0f962ae2 PU	436	static struct resource twl6040_vibra_rsrc[] = {
	437	{
	438	.flags = IORESOURCE_IRQ,
	439	},
	440	};
	441
	442	static struct resource twl6040_codec_rsrc[] = {
	443	{
	444	.flags = IORESOURCE_IRQ,
	445	},
	446	};
	447
f19b2823 MLC	448	static int __devinit twl6040_probe(struct platform_device *pdev)
	449	{
	450	struct twl4030_audio_data *pdata = pdev->dev.platform_data;
	451	struct twl6040 *twl6040;
	452	struct mfd_cell *cell = NULL;
	453	int ret, children = 0;
	454
	455	if (!pdata) {
	456	dev_err(&pdev->dev, "Platform data is missing\n");
	457	return -EINVAL;
	458	}
	459
d20e1d21 PU	460	/* In order to operate correctly we need valid interrupt config */
	461	if (!pdata->naudint_irq \|\| !pdata->irq_base) {
	462	dev_err(&pdev->dev, "Invalid IRQ configuration\n");
	463	return -EINVAL;
	464	}
	465
f19b2823 MLC	466	twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL);
	467	if (!twl6040)
	468	return -ENOMEM;
	469
	470	platform_set_drvdata(pdev, twl6040);
	471
f19b2823 MLC	472	twl6040->dev = &pdev->dev;
	473	twl6040->audpwron = pdata->audpwron_gpio;
	474	twl6040->irq = pdata->naudint_irq;
	475	twl6040->irq_base = pdata->irq_base;
	476
	477	mutex_init(&twl6040->mutex);
	478	mutex_init(&twl6040->io_mutex);
	479	init_completion(&twl6040->ready);
	480
	481	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
	482
	483	if (gpio_is_valid(twl6040->audpwron)) {
	484	ret = gpio_request(twl6040->audpwron, "audpwron");
	485	if (ret)
	486	goto gpio1_err;
	487
	488	ret = gpio_direction_output(twl6040->audpwron, 0);
	489	if (ret)
	490	goto gpio2_err;
	491	}
	492
	493	/* ERRATA: Automatic power-up is not possible in ES1.0 */
a69882ae	494	if (twl6040_get_revid(twl6040) == TWL6040_REV_ES1_0)
f19b2823 MLC	495	twl6040->audpwron = -EINVAL;
f19b2823 MLC	496
d20e1d21 PU	497	/* codec interrupt */
	498	ret = twl6040_irq_init(twl6040);
	499	if (ret)
	500	goto gpio2_err;
	501
1b7c4725 PU	502	ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
	503	NULL, twl6040_naudint_handler, 0,
	504	"twl6040_irq_ready", twl6040);
d20e1d21 PU	505	if (ret) {
	506	dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
	507	ret);
	508	goto irq_err;
f19b2823 MLC	509	}
	510
	511	/* dual-access registers controlled by I2C only */
	512	twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
	513
	514	if (pdata->codec) {
0f962ae2 PU	515	int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
0f962ae2 PU	516
f19b2823 MLC	517	cell = &twl6040->cells[children];
f19b2823 MLC	518	cell->name = "twl6040-codec";
0f962ae2 PU	519	twl6040_codec_rsrc[0].start = irq;
	520	twl6040_codec_rsrc[0].end = irq;
	521	cell->resources = twl6040_codec_rsrc;
	522	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
6c448637 PU	523	cell->platform_data = pdata->codec;
6c448637 PU	524	cell->pdata_size = sizeof(*pdata->codec);
f19b2823 MLC	525	children++;
	526	}
	527
	528	if (pdata->vibra) {
0f962ae2 PU	529	int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
0f962ae2 PU	530
f19b2823 MLC	531	cell = &twl6040->cells[children];
f19b2823 MLC	532	cell->name = "twl6040-vibra";
0f962ae2 PU	533	twl6040_vibra_rsrc[0].start = irq;
	534	twl6040_vibra_rsrc[0].end = irq;
	535	cell->resources = twl6040_vibra_rsrc;
	536	cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
	537
f19b2823 MLC	538	cell->platform_data = pdata->vibra;
	539	cell->pdata_size = sizeof(*pdata->vibra);
	540	children++;
	541	}
	542
	543	if (children) {
	544	ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells,
	545	children, NULL, 0);
	546	if (ret)
	547	goto mfd_err;
	548	} else {
	549	dev_err(&pdev->dev, "No platform data found for children\n");
	550	ret = -ENODEV;
	551	goto mfd_err;
	552	}
	553
	554	return 0;
	555
	556	mfd_err:
1b7c4725	557	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
f19b2823	558	irq_err:
d20e1d21	559	twl6040_irq_exit(twl6040);
f19b2823 MLC	560	gpio2_err:
	561	if (gpio_is_valid(twl6040->audpwron))
	562	gpio_free(twl6040->audpwron);
	563	gpio1_err:
	564	platform_set_drvdata(pdev, NULL);
	565	kfree(twl6040);
f19b2823 MLC	566	return ret;
	567	}
	568
	569	static int __devexit twl6040_remove(struct platform_device *pdev)
	570	{
	571	struct twl6040 *twl6040 = platform_get_drvdata(pdev);
	572
	573	if (twl6040->power_count)
	574	twl6040_power(twl6040, 0);
	575
	576	if (gpio_is_valid(twl6040->audpwron))
	577	gpio_free(twl6040->audpwron);
	578
1b7c4725	579	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
d20e1d21	580	twl6040_irq_exit(twl6040);
f19b2823 MLC	581
	582	mfd_remove_devices(&pdev->dev);
	583	platform_set_drvdata(pdev, NULL);
	584	kfree(twl6040);
f19b2823 MLC	585
	586	return 0;
	587	}
	588
	589	static struct platform_driver twl6040_driver = {
	590	.probe = twl6040_probe,
	591	.remove = __devexit_p(twl6040_remove),
	592	.driver = {
	593	.owner = THIS_MODULE,
	594	.name = "twl6040",
	595	},
	596	};
	597
	598	static int __devinit twl6040_init(void)
	599	{
	600	return platform_driver_register(&twl6040_driver);
	601	}
	602	module_init(twl6040_init);
	603
	604	static void __devexit twl6040_exit(void)
	605	{
	606	platform_driver_unregister(&twl6040_driver);
	607	}
	608
	609	module_exit(twl6040_exit);
	610
	611	MODULE_DESCRIPTION("TWL6040 MFD");
	612	MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
	613	MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
	614	MODULE_LICENSE("GPL");
	615	MODULE_ALIAS("platform:twl6040");