[linux.git] / drivers / mfd / twl6040-core.c

/*
 * MFD driver for TWL6040 audio device
 *
 * Authors:	Misael Lopez Cruz <[email protected]>
 *		Jorge Eduardo Candelaria <[email protected]>
 *		Peter Ujfalusi <[email protected]>
 *
 * 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>

#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)

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

	mutex_lock(&twl6040->io_mutex);
	/* Vibra control registers from cache */
	if (unlikely(reg == TWL6040_REG_VIBCTLL ||
		     reg == TWL6040_REG_VIBCTLR)) {
		val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
	} else {
		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);
	/* Cache the vibra control registers */
	if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
		twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
	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;
		twl6040->mclk = 32768;
	} 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;
		twl6040->mclk = 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);

	/* Force full reconfiguration when switching between PLL */
	if (pll_id != twl6040->pll) {
		twl6040->sysclk = 0;
		twl6040->mclk = 0;
	}

	switch (pll_id) {
	case TWL6040_SYSCLK_SEL_LPPLL:
		/* low-power PLL divider */
		/* Change the sysclk configuration only if it has been canged */
		if (twl6040->sysclk != freq_out) {
			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);
		}

		/* The PLL in use has not been change, we can exit */
		if (twl6040->pll == pll_id)
			break;

		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;
		}

		if (twl6040->mclk != freq_in) {
			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->mclk = freq_in;
	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);

/* Get the combined status of the vibra control register */
int twl6040_get_vibralr_status(struct twl6040 *twl6040)
{
	u8 status;

	status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
	status &= (TWL6040_VIBENA | TWL6040_VIBSEL);

	return status;
}
EXPORT_SYMBOL(twl6040_get_vibralr_status);

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->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);

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

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

	/* 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",
	},
};

module_platform_driver(twl6040_driver);

MODULE_DESCRIPTION("TWL6040 MFD");
MODULE_AUTHOR("Misael Lopez Cruz <[email protected]>");
MODULE_AUTHOR("Jorge Eduardo Candelaria <[email protected]>");
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 <[email protected]>
	5	* Jorge Eduardo Candelaria <[email protected]>
	6	* Peter Ujfalusi <[email protected]>
	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
31b402e3 PU	37	#define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
31b402e3 PU	38
f19b2823 MLC	39	int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
	40	{
	41	int ret;
	42	u8 val = 0;
	43
	44	mutex_lock(&twl6040->io_mutex);
31b402e3 PU	45	/* Vibra control registers from cache */
	46	if (unlikely(reg == TWL6040_REG_VIBCTLL \|\|
	47	reg == TWL6040_REG_VIBCTLR)) {
	48	val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
	49	} else {
	50	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	51	if (ret < 0) {
	52	mutex_unlock(&twl6040->io_mutex);
	53	return ret;
	54	}
f19b2823 MLC	55	}
	56	mutex_unlock(&twl6040->io_mutex);
	57
	58	return val;
	59	}
	60	EXPORT_SYMBOL(twl6040_reg_read);
	61
	62	int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
	63	{
	64	int ret;
	65
	66	mutex_lock(&twl6040->io_mutex);
	67	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
31b402e3 PU	68	/* Cache the vibra control registers */
	69	if (reg == TWL6040_REG_VIBCTLL \|\| reg == TWL6040_REG_VIBCTLR)
	70	twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
f19b2823 MLC	71	mutex_unlock(&twl6040->io_mutex);
	72
	73	return ret;
	74	}
	75	EXPORT_SYMBOL(twl6040_reg_write);
	76
	77	int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	78	{
	79	int ret;
	80	u8 val;
	81
	82	mutex_lock(&twl6040->io_mutex);
	83	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	84	if (ret)
	85	goto out;
	86
	87	val \|= mask;
	88	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	89	out:
	90	mutex_unlock(&twl6040->io_mutex);
	91	return ret;
	92	}
	93	EXPORT_SYMBOL(twl6040_set_bits);
	94
	95	int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
	96	{
	97	int ret;
	98	u8 val;
	99
	100	mutex_lock(&twl6040->io_mutex);
	101	ret = twl_i2c_read_u8(TWL_MODULE_AUDIO_VOICE, &val, reg);
	102	if (ret)
	103	goto out;
	104
	105	val &= ~mask;
	106	ret = twl_i2c_write_u8(TWL_MODULE_AUDIO_VOICE, val, reg);
	107	out:
	108	mutex_unlock(&twl6040->io_mutex);
	109	return ret;
	110	}
	111	EXPORT_SYMBOL(twl6040_clear_bits);
	112
	113	/* twl6040 codec manual power-up sequence */
	114	static int twl6040_power_up(struct twl6040 *twl6040)
	115	{
	116	u8 ldoctl, ncpctl, lppllctl;
	117	int ret;
	118
	119	/* enable high-side LDO, reference system and internal oscillator */
	120	ldoctl = TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA;
	121	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
	122	if (ret)
	123	return ret;
	124	usleep_range(10000, 10500);
	125
	126	/* enable negative charge pump */
	127	ncpctl = TWL6040_NCPENA;
	128	ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
	129	if (ret)
	130	goto ncp_err;
	131	usleep_range(1000, 1500);
	132
	133	/* enable low-side LDO */
	134	ldoctl \|= TWL6040_LSLDOENA;
135	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
136	if (ret)
137	goto lsldo_err;
138	usleep_range(1000, 1500);
139
140	/* enable low-power PLL */
141	lppllctl = TWL6040_LPLLENA;
142	ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
143	if (ret)
144	goto lppll_err;
145	usleep_range(5000, 5500);
146
147	/* disable internal oscillator */
148	ldoctl &= ~TWL6040_OSCENA;
149	ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
150	if (ret)
151	goto osc_err;
152
153	return 0;
154
155	osc_err:
156	lppllctl &= ~TWL6040_LPLLENA;
157	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
158	lppll_err:
159	ldoctl &= ~TWL6040_LSLDOENA;
160	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
161	lsldo_err:
162	ncpctl &= ~TWL6040_NCPENA;
163	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
164	ncp_err:
165	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
166	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
167
168	return ret;
169	}
170
171	/* twl6040 manual power-down sequence */
172	static void twl6040_power_down(struct twl6040 *twl6040)
173	{
174	u8 ncpctl, ldoctl, lppllctl;
175
176	ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
177	ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
178	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
179
180	/* enable internal oscillator */
181	ldoctl \|= TWL6040_OSCENA;
182	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
183	usleep_range(1000, 1500);
184
185	/* disable low-power PLL */
186	lppllctl &= ~TWL6040_LPLLENA;
187	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
188
189	/* disable low-side LDO */
190	ldoctl &= ~TWL6040_LSLDOENA;
191	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
192
193	/* disable negative charge pump */
194	ncpctl &= ~TWL6040_NCPENA;
195	twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
196
197	/* disable high-side LDO, reference system and internal oscillator */
198	ldoctl &= ~(TWL6040_HSLDOENA \| TWL6040_REFENA \| TWL6040_OSCENA);
199	twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
200	}
201
202	static irqreturn_t twl6040_naudint_handler(int irq, void *data)
203	{
204	struct twl6040 *twl6040 = data;
205	u8 intid, status;
206
207	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
208
209	if (intid & TWL6040_READYINT)
210	complete(&twl6040->ready);
211
212	if (intid & TWL6040_THINT) {
213	status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
214	if (status & TWL6040_TSHUTDET) {
2d7c957e	215	dev_warn(twl6040->dev,
f19b2823 MLC	216	"Thermal shutdown, powering-off");
	217	twl6040_power(twl6040, 0);
	218	} else {
2d7c957e	219	dev_warn(twl6040->dev,
f19b2823 MLC	220	"Leaving thermal shutdown, powering-on");
	221	twl6040_power(twl6040, 1);
	222	}
	223	}
	224
	225	return IRQ_HANDLED;
	226	}
	227
	228	static int twl6040_power_up_completion(struct twl6040 *twl6040,
	229	int naudint)
	230	{
	231	int time_left;
	232	u8 intid;
	233
	234	time_left = wait_for_completion_timeout(&twl6040->ready,
	235	msecs_to_jiffies(144));
	236	if (!time_left) {
	237	intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
	238	if (!(intid & TWL6040_READYINT)) {
2d7c957e	239	dev_err(twl6040->dev,
f19b2823 MLC	240	"timeout waiting for READYINT\n");
	241	return -ETIMEDOUT;
	242	}
	243	}
	244
	245	return 0;
	246	}
	247
	248	int twl6040_power(struct twl6040 *twl6040, int on)
	249	{
	250	int audpwron = twl6040->audpwron;
	251	int naudint = twl6040->irq;
	252	int ret = 0;
	253
	254	mutex_lock(&twl6040->mutex);
	255
	256	if (on) {
	257	/* already powered-up */
	258	if (twl6040->power_count++)
	259	goto out;
	260
	261	if (gpio_is_valid(audpwron)) {
	262	/* use AUDPWRON line */
	263	gpio_set_value(audpwron, 1);
	264	/* wait for power-up completion */
	265	ret = twl6040_power_up_completion(twl6040, naudint);
	266	if (ret) {
2d7c957e	267	dev_err(twl6040->dev,
f19b2823 MLC	268	"automatic power-down failed\n");
	269	twl6040->power_count = 0;
	270	goto out;
	271	}
	272	} else {
	273	/* use manual power-up sequence */
	274	ret = twl6040_power_up(twl6040);
	275	if (ret) {
2d7c957e	276	dev_err(twl6040->dev,
f19b2823 MLC	277	"manual power-up failed\n");
	278	twl6040->power_count = 0;
	279	goto out;
	280	}
	281	}
cfb7a33b PU	282	/* Default PLL configuration after power up */
cfb7a33b PU	283	twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
f19b2823	284	twl6040->sysclk = 19200000;
f8447d6c	285	twl6040->mclk = 32768;
f19b2823 MLC	286	} else {
	287	/* already powered-down */
	288	if (!twl6040->power_count) {
2d7c957e	289	dev_err(twl6040->dev,
f19b2823 MLC	290	"device is already powered-off\n");
	291	ret = -EPERM;
	292	goto out;
	293	}
	294
	295	if (--twl6040->power_count)
	296	goto out;
	297
	298	if (gpio_is_valid(audpwron)) {
	299	/* use AUDPWRON line */
	300	gpio_set_value(audpwron, 0);
	301
	302	/* power-down sequence latency */
	303	usleep_range(500, 700);
	304	} else {
	305	/* use manual power-down sequence */
	306	twl6040_power_down(twl6040);
	307	}
f19b2823	308	twl6040->sysclk = 0;
f8447d6c	309	twl6040->mclk = 0;
f19b2823 MLC	310	}
	311
	312	out:
	313	mutex_unlock(&twl6040->mutex);
	314	return ret;
	315	}
	316	EXPORT_SYMBOL(twl6040_power);
	317
cfb7a33b	318	int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
f19b2823 MLC	319	unsigned int freq_in, unsigned int freq_out)
	320	{
	321	u8 hppllctl, lppllctl;
	322	int ret = 0;
	323
	324	mutex_lock(&twl6040->mutex);
	325
	326	hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
	327	lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
	328
2bd05db7 PU	329	/* Force full reconfiguration when switching between PLL */
	330	if (pll_id != twl6040->pll) {
	331	twl6040->sysclk = 0;
	332	twl6040->mclk = 0;
	333	}
	334
cfb7a33b PU	335	switch (pll_id) {
cfb7a33b PU	336	case TWL6040_SYSCLK_SEL_LPPLL:
f19b2823	337	/* low-power PLL divider */
2bd05db7 PU	338	/* Change the sysclk configuration only if it has been canged */
	339	if (twl6040->sysclk != freq_out) {
	340	switch (freq_out) {
	341	case 17640000:
	342	lppllctl \|= TWL6040_LPLLFIN;
	343	break;
	344	case 19200000:
	345	lppllctl &= ~TWL6040_LPLLFIN;
	346	break;
	347	default:
	348	dev_err(twl6040->dev,
	349	"freq_out %d not supported\n",
	350	freq_out);
	351	ret = -EINVAL;
	352	goto pll_out;
	353	}
	354	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	355	lppllctl);
f19b2823	356	}
2bd05db7 PU	357
	358	/* The PLL in use has not been change, we can exit */
	359	if (twl6040->pll == pll_id)
	360	break;
f19b2823 MLC	361
	362	switch (freq_in) {
	363	case 32768:
	364	lppllctl \|= TWL6040_LPLLENA;
	365	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	366	lppllctl);
	367	mdelay(5);
	368	lppllctl &= ~TWL6040_HPLLSEL;
	369	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	370	lppllctl);
	371	hppllctl &= ~TWL6040_HPLLENA;
	372	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
	373	hppllctl);
	374	break;
	375	default:
2d7c957e	376	dev_err(twl6040->dev,
f19b2823 MLC	377	"freq_in %d not supported\n", freq_in);
	378	ret = -EINVAL;
	379	goto pll_out;
	380	}
f19b2823	381	break;
cfb7a33b	382	case TWL6040_SYSCLK_SEL_HPPLL:
f19b2823 MLC	383	/* high-performance PLL can provide only 19.2 MHz */
f19b2823 MLC	384	if (freq_out != 19200000) {
2d7c957e	385	dev_err(twl6040->dev,
f19b2823 MLC	386	"freq_out %d not supported\n", freq_out);
	387	ret = -EINVAL;
	388	goto pll_out;
	389	}
	390
2bd05db7 PU	391	if (twl6040->mclk != freq_in) {
	392	hppllctl &= ~TWL6040_MCLK_MSK;
	393
	394	switch (freq_in) {
	395	case 12000000:
	396	/* PLL enabled, active mode */
	397	hppllctl \|= TWL6040_MCLK_12000KHZ \|
	398	TWL6040_HPLLENA;
	399	break;
	400	case 19200000:
	401	/*
	402	* PLL disabled
	403	* (enable PLL if MCLK jitter quality
	404	* doesn't meet specification)
	405	*/
	406	hppllctl \|= TWL6040_MCLK_19200KHZ;
	407	break;
	408	case 26000000:
	409	/* PLL enabled, active mode */
	410	hppllctl \|= TWL6040_MCLK_26000KHZ \|
	411	TWL6040_HPLLENA;
	412	break;
	413	case 38400000:
	414	/* PLL enabled, active mode */
	415	hppllctl \|= TWL6040_MCLK_38400KHZ \|
	416	TWL6040_HPLLENA;
	417	break;
	418	default:
	419	dev_err(twl6040->dev,
	420	"freq_in %d not supported\n", freq_in);
	421	ret = -EINVAL;
	422	goto pll_out;
	423	}
f19b2823	424
f19b2823	425	/*
2bd05db7 PU	426	* enable clock slicer to ensure input waveform is
2bd05db7 PU	427	* square
f19b2823	428	*/
2bd05db7	429	hppllctl \|= TWL6040_HPLLSQRENA;
f19b2823	430
2bd05db7 PU	431	twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
	432	hppllctl);
	433	usleep_range(500, 700);
	434	lppllctl \|= TWL6040_HPLLSEL;
	435	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	436	lppllctl);
	437	lppllctl &= ~TWL6040_LPLLENA;
	438	twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
	439	lppllctl);
	440	}
f19b2823 MLC	441	break;
f19b2823 MLC	442	default:
2d7c957e	443	dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
f19b2823 MLC	444	ret = -EINVAL;
	445	goto pll_out;
	446	}
	447
	448	twl6040->sysclk = freq_out;
f8447d6c	449	twl6040->mclk = freq_in;
cfb7a33b	450	twl6040->pll = pll_id;
f19b2823 MLC	451
	452	pll_out:
	453	mutex_unlock(&twl6040->mutex);
	454	return ret;
	455	}
	456	EXPORT_SYMBOL(twl6040_set_pll);
	457
cfb7a33b	458	int twl6040_get_pll(struct twl6040 *twl6040)
f19b2823	459	{
cfb7a33b PU	460	if (twl6040->power_count)
	461	return twl6040->pll;
	462	else
	463	return -ENODEV;
f19b2823 MLC	464	}
	465	EXPORT_SYMBOL(twl6040_get_pll);
	466
	467	unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
	468	{
	469	return twl6040->sysclk;
	470	}
	471	EXPORT_SYMBOL(twl6040_get_sysclk);
	472
70601ec1 PU	473	/* Get the combined status of the vibra control register */
	474	int twl6040_get_vibralr_status(struct twl6040 *twl6040)
	475	{
	476	u8 status;
	477
	478	status = twl6040->vibra_ctrl_cache[0] \| twl6040->vibra_ctrl_cache[1];
	479	status &= (TWL6040_VIBENA \| TWL6040_VIBSEL);
	480
	481	return status;
	482	}
	483	EXPORT_SYMBOL(twl6040_get_vibralr_status);
	484
0f962ae2 PU	485	static struct resource twl6040_vibra_rsrc[] = {
	486	{
	487	.flags = IORESOURCE_IRQ,
	488	},
	489	};
	490
	491	static struct resource twl6040_codec_rsrc[] = {
	492	{
	493	.flags = IORESOURCE_IRQ,
	494	},
	495	};
	496
f19b2823 MLC	497	static int __devinit twl6040_probe(struct platform_device *pdev)
	498	{
	499	struct twl4030_audio_data *pdata = pdev->dev.platform_data;
	500	struct twl6040 *twl6040;
	501	struct mfd_cell *cell = NULL;
	502	int ret, children = 0;
	503
	504	if (!pdata) {
	505	dev_err(&pdev->dev, "Platform data is missing\n");
	506	return -EINVAL;
	507	}
	508
d20e1d21 PU	509	/* In order to operate correctly we need valid interrupt config */
	510	if (!pdata->naudint_irq \|\| !pdata->irq_base) {
	511	dev_err(&pdev->dev, "Invalid IRQ configuration\n");
	512	return -EINVAL;
	513	}
	514
f19b2823 MLC	515	twl6040 = kzalloc(sizeof(struct twl6040), GFP_KERNEL);
	516	if (!twl6040)
	517	return -ENOMEM;
	518
	519	platform_set_drvdata(pdev, twl6040);
	520
f19b2823	521	twl6040->dev = &pdev->dev;
f19b2823 MLC	522	twl6040->irq = pdata->naudint_irq;
	523	twl6040->irq_base = pdata->irq_base;
	524
	525	mutex_init(&twl6040->mutex);
	526	mutex_init(&twl6040->io_mutex);
	527	init_completion(&twl6040->ready);
	528
	529	twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
	530
77f63e06 PU	531	/* ERRATA: Automatic power-up is not possible in ES1.0 */
	532	if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
	533	twl6040->audpwron = pdata->audpwron_gpio;
	534	else
	535	twl6040->audpwron = -EINVAL;
	536
f19b2823	537	if (gpio_is_valid(twl6040->audpwron)) {
b04edb93 AL	538	ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
b04edb93 AL	539	"audpwron");
f19b2823 MLC	540	if (ret)
f19b2823 MLC	541	goto gpio1_err;
f19b2823 MLC	542	}
f19b2823 MLC	543
d20e1d21 PU	544	/* codec interrupt */
	545	ret = twl6040_irq_init(twl6040);
	546	if (ret)
	547	goto gpio2_err;
	548
1b7c4725 PU	549	ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
	550	NULL, twl6040_naudint_handler, 0,
	551	"twl6040_irq_ready", twl6040);
d20e1d21 PU	552	if (ret) {
	553	dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
	554	ret);
	555	goto irq_err;
f19b2823 MLC	556	}
	557
	558	/* dual-access registers controlled by I2C only */
	559	twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
	560
	561	if (pdata->codec) {
0f962ae2 PU	562	int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
0f962ae2 PU	563
f19b2823 MLC	564	cell = &twl6040->cells[children];
f19b2823 MLC	565	cell->name = "twl6040-codec";
0f962ae2 PU	566	twl6040_codec_rsrc[0].start = irq;
	567	twl6040_codec_rsrc[0].end = irq;
	568	cell->resources = twl6040_codec_rsrc;
	569	cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
6c448637 PU	570	cell->platform_data = pdata->codec;
6c448637 PU	571	cell->pdata_size = sizeof(*pdata->codec);
f19b2823 MLC	572	children++;
	573	}
	574
	575	if (pdata->vibra) {
0f962ae2 PU	576	int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
0f962ae2 PU	577
f19b2823 MLC	578	cell = &twl6040->cells[children];
f19b2823 MLC	579	cell->name = "twl6040-vibra";
0f962ae2 PU	580	twl6040_vibra_rsrc[0].start = irq;
	581	twl6040_vibra_rsrc[0].end = irq;
	582	cell->resources = twl6040_vibra_rsrc;
	583	cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
	584
f19b2823 MLC	585	cell->platform_data = pdata->vibra;
	586	cell->pdata_size = sizeof(*pdata->vibra);
	587	children++;
	588	}
	589
	590	if (children) {
	591	ret = mfd_add_devices(&pdev->dev, pdev->id, twl6040->cells,
	592	children, NULL, 0);
	593	if (ret)
	594	goto mfd_err;
	595	} else {
	596	dev_err(&pdev->dev, "No platform data found for children\n");
	597	ret = -ENODEV;
	598	goto mfd_err;
	599	}
	600
	601	return 0;
	602
	603	mfd_err:
1b7c4725	604	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
f19b2823	605	irq_err:
d20e1d21	606	twl6040_irq_exit(twl6040);
f19b2823 MLC	607	gpio2_err:
	608	if (gpio_is_valid(twl6040->audpwron))
	609	gpio_free(twl6040->audpwron);
	610	gpio1_err:
	611	platform_set_drvdata(pdev, NULL);
	612	kfree(twl6040);
f19b2823 MLC	613	return ret;
	614	}
	615
	616	static int __devexit twl6040_remove(struct platform_device *pdev)
	617	{
	618	struct twl6040 *twl6040 = platform_get_drvdata(pdev);
	619
	620	if (twl6040->power_count)
	621	twl6040_power(twl6040, 0);
	622
	623	if (gpio_is_valid(twl6040->audpwron))
	624	gpio_free(twl6040->audpwron);
	625
1b7c4725	626	free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
d20e1d21	627	twl6040_irq_exit(twl6040);
f19b2823 MLC	628
	629	mfd_remove_devices(&pdev->dev);
	630	platform_set_drvdata(pdev, NULL);
	631	kfree(twl6040);
f19b2823 MLC	632
	633	return 0;
	634	}
	635
	636	static struct platform_driver twl6040_driver = {
	637	.probe = twl6040_probe,
	638	.remove = __devexit_p(twl6040_remove),
	639	.driver = {
	640	.owner = THIS_MODULE,
	641	.name = "twl6040",
	642	},
	643	};
	644
65349d60	645	module_platform_driver(twl6040_driver);
f19b2823 MLC	646
	647	MODULE_DESCRIPTION("TWL6040 MFD");
	648	MODULE_AUTHOR("Misael Lopez Cruz <[email protected]>");
	649	MODULE_AUTHOR("Jorge Eduardo Candelaria <[email protected]>");
	650	MODULE_LICENSE("GPL");
	651	MODULE_ALIAS("platform:twl6040");