tps65010.c

linux-2.6.15.6

		omap_set_gpio_direction(OMAP_MPUIO(1), 1);
		set_irq_type(tps->irq, IRQT_FALLING);
	}
	if (machine_is_omap_h3()) {
		tps->model = TPS65013;

		// FIXME set up this board's IRQ ...
	}
#else
#define set_irq_type(num,trigger)	do{}while(0)
#endif

	if (tps->irq > 0) {
		set_irq_type(tps->irq, IRQT_LOW);
		status = request_irq(tps->irq, tps65010_irq,
			SA_SAMPLE_RANDOM, DRIVER_NAME, tps);
		if (status < 0) {
			dev_dbg(&tps->client.dev, "can't get IRQ %d, err %d\n",
					tps->irq, status);
			i2c_detach_client(&tps->client);
			goto fail1;
		}
#ifdef	CONFIG_ARM
		/* annoying race here, ideally we'd have an option
		 * to claim the irq now and enable it later.
		 */
		disable_irq(tps->irq);
		set_bit(FLAG_IRQ_ENABLE, &tps->flags);
#endif
	} else
		printk(KERN_WARNING "%s: IRQ not configured!\n",
				DRIVER_NAME);


	switch (tps->model) {
	case TPS65010:
	case TPS65012:
		tps->por = 1;
		break;
	case TPS_UNKNOWN:
		printk(KERN_WARNING "%s: unknown TPS chip\n", DRIVER_NAME);
		break;
	/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
	}
	tps->chgconf = i2c_smbus_read_byte_data(&tps->client, TPS_CHGCONFIG);
	show_chgconfig(tps->por, "conf/init", tps->chgconf);

	show_chgstatus("chg/init",
		i2c_smbus_read_byte_data(&tps->client, TPS_CHGSTATUS));
	show_regstatus("reg/init",
		i2c_smbus_read_byte_data(&tps->client, TPS_REGSTATUS));

	pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
		i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC1),
		i2c_smbus_read_byte_data(&tps->client, TPS_VDCDC2),
		i2c_smbus_read_byte_data(&tps->client, TPS_VREGS1));
	pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
		i2c_smbus_read_byte_data(&tps->client, TPS_DEFGPIO),
		i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));

	tps65010_driver.attach_adapter = tps65010_noscan;
	the_tps = tps;

#if	defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
	/* USB hosts can't draw VBUS.  OTG devices could, later
	 * when OTG infrastructure enables it.  USB peripherals
	 * could be relying on VBUS while booting, though.
	 */
	tps->vbus = 100;
#endif

	/* unmask the "interesting" irqs, then poll once to
	 * kickstart monitoring, initialize shadowed status
	 * registers, and maybe disable VBUS draw.
	 */
	tps->nmask1 = ~0;
	(void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK1, ~tps->nmask1);

	tps->nmask2 = TPS_REG_ONOFF;
	if (tps->model == TPS65013)
		tps->nmask2 |= TPS_REG_NO_CHG;
	(void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK2, ~tps->nmask2);

	(void) i2c_smbus_write_byte_data(&tps->client, TPS_MASK3, 0x0f
		| i2c_smbus_read_byte_data(&tps->client, TPS_MASK3));

	tps65010_work(tps);

	tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
				tps, DEBUG_FOPS);
	return 0;
fail1:
	kfree(tps);
	return 0;
}

static int __init tps65010_scan_bus(struct i2c_adapter *bus)
{
	if (!i2c_check_functionality(bus, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EINVAL;
	return i2c_probe(bus, &addr_data, tps65010_probe);
}

static struct i2c_driver tps65010_driver = {
	.owner		= THIS_MODULE,
	.name		= "tps65010",
	.flags		= I2C_DF_NOTIFY,
	.attach_adapter	= tps65010_scan_bus,
	.detach_client	= __exit_p(tps65010_detach_client),
};

/*-------------------------------------------------------------------------*/

/* Draw from VBUS:
 *   0 mA -- DON'T DRAW (might supply power instead)
 * 100 mA -- usb unit load (slowest charge rate)
 * 500 mA -- usb high power (fast battery charge)
 */
int tps65010_set_vbus_draw(unsigned mA)
{
	unsigned long	flags;

	if (!the_tps)
		return -ENODEV;

	/* assumes non-SMP */
	local_irq_save(flags);
	if (mA >= 500)
		mA = 500;
	else if (mA >= 100)
		mA = 100;
	else
		mA = 0;
	the_tps->vbus = mA;
	if ((the_tps->chgstatus & TPS_CHG_USB)
			&& test_and_set_bit(
				FLAG_VBUS_CHANGED, &the_tps->flags)) {
		/* gadget drivers call this in_irq() */
		(void) schedule_work(&the_tps->work);
	}
	local_irq_restore(flags);

	return 0;
}
EXPORT_SYMBOL(tps65010_set_vbus_draw);

/*-------------------------------------------------------------------------*/
/* tps65010_set_gpio_out_value parameter:
 * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 * value: LOW or HIGH
 */
int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
{
	int	 status;
	unsigned defgpio;

	if (!the_tps)
		return -ENODEV;
	if ((gpio < GPIO1) || (gpio > GPIO4))
		return -EINVAL;

	down(&the_tps->lock);

	defgpio = i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO);

	/* Configure GPIO for output */
	defgpio |= 1 << (gpio + 3);

	/* Writing 1 forces a logic 0 on that GPIO and vice versa */
	switch (value) {
	case LOW:
		defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
		break;
	/* case HIGH: */
	default:
		defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
		break;
	}

	status = i2c_smbus_write_byte_data(&the_tps->client,
		TPS_DEFGPIO, defgpio);

	pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
		gpio, value ? "high" : "low",
		i2c_smbus_read_byte_data(&the_tps->client, TPS_DEFGPIO));

	up(&the_tps->lock);
	return status;
}
EXPORT_SYMBOL(tps65010_set_gpio_out_value);

/*-------------------------------------------------------------------------*/
/* tps65010_set_led parameter:
 * led:  LED1 or LED2
 * mode: ON, OFF or BLINK
 */
int tps65010_set_led(unsigned led, unsigned mode)
{
	int	 status;
	unsigned led_on, led_per, offs;

	if (!the_tps)
		return -ENODEV;

	if (led == LED1)
		offs = 0;
	else {
		offs = 2;
		led = LED2;
	}

	down(&the_tps->lock);

	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(&the_tps->client,
				TPS_LED1_ON + offs));

	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(&the_tps->client,
				TPS_LED1_PER + offs));

	switch (mode) {
	case OFF:
		led_on  = 1 << 7;
		led_per = 0 << 7;
		break;
	case ON:
		led_on  = 1 << 7;
		led_per = 1 << 7;
		break;
	case BLINK:
		led_on  = 0x30 | (0 << 7);
		led_per = 0x08 | (1 << 7);
		break;
	default:
		printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
		       DRIVER_NAME);
		up(&the_tps->lock);
		return -EINVAL;
	}

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_LED1_ON + offs, led_on);

	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write led%i_on register\n",
		       DRIVER_NAME, led);
		up(&the_tps->lock);
		return status;
	}

	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(&the_tps->client, TPS_LED1_ON + offs));

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_LED1_PER + offs, led_per);

	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write led%i_per register\n",
		       DRIVER_NAME, led);
		up(&the_tps->lock);
		return status;
	}

	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(&the_tps->client,
				TPS_LED1_PER + offs));

	up(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_set_led);

/*-------------------------------------------------------------------------*/
/* tps65010_set_vib parameter:
 * value: ON or OFF
 */
int tps65010_set_vib(unsigned value)
{
	int	 status;
	unsigned vdcdc2;

	if (!the_tps)
		return -ENODEV;

	down(&the_tps->lock);

	vdcdc2 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC2);
	vdcdc2 &= ~(1 << 1);
	if (value)
		vdcdc2 |= (1 << 1);
	status = i2c_smbus_write_byte_data(&the_tps->client,
		TPS_VDCDC2, vdcdc2);

	pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");

	up(&the_tps->lock);
	return status;
}
EXPORT_SYMBOL(tps65010_set_vib);

/*-------------------------------------------------------------------------*/
/* tps65010_set_low_pwr parameter:
 * mode: ON or OFF
 */
int tps65010_set_low_pwr(unsigned mode)
{
	int	 status;
	unsigned vdcdc1;

	if (!the_tps)
		return -ENODEV;

	down(&the_tps->lock);

	pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
		mode ? "enable" : "disable",
		i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));

	vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);

	switch (mode) {
	case OFF:
		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
		break;
	/* case ON: */
	default:
		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
		break;
	}

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_VDCDC1, vdcdc1);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
			DRIVER_NAME);
	else
		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));

	up(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_set_low_pwr);

/*-------------------------------------------------------------------------*/
/* tps65010_config_vregs1 parameter:
 * value to be written to VREGS1 register
 * Note: The complete register is written, set all bits you need
 */
int tps65010_config_vregs1(unsigned value)
{
	int	 status;

	if (!the_tps)
		return -ENODEV;

	down(&the_tps->lock);

	pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_VREGS1, value);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vregs1 register\n",
			DRIVER_NAME);
	else
		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(&the_tps->client, TPS_VREGS1));

	up(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_config_vregs1);

/*-------------------------------------------------------------------------*/
/* tps65013_set_low_pwr parameter:
 * mode: ON or OFF
 */

/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
	required if power supply is through a battery */

int tps65013_set_low_pwr(unsigned mode)
{
	int	 status;
	unsigned vdcdc1, chgconfig;

	if (!the_tps || the_tps->por)
		return -ENODEV;

	down(&the_tps->lock);

	pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
		DRIVER_NAME,
		mode ? "enable" : "disable",
		i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG),
		i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));

	chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
	vdcdc1 = i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1);

	switch (mode) {
	case OFF:
		chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
		break;
	/* case ON: */
	default:
		chgconfig |= TPS65013_AUA;  /* enable AUA bit */
		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
		break;
	}

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_CHGCONFIG, chgconfig);
	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write chconfig register\n",
	 DRIVER_NAME);
		up(&the_tps->lock);
		return status;
	}

	chgconfig = i2c_smbus_read_byte_data(&the_tps->client, TPS_CHGCONFIG);
	the_tps->chgconf = chgconfig;
	show_chgconfig(0, "chgconf", chgconfig);

	status = i2c_smbus_write_byte_data(&the_tps->client,
			TPS_VDCDC1, vdcdc1);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
	 DRIVER_NAME);
	else
		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(&the_tps->client, TPS_VDCDC1));

	up(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65013_set_low_pwr);

/*-------------------------------------------------------------------------*/

static int __init tps_init(void)
{
	u32	tries = 3;
	int	status = -ENODEV;

	printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);

	/* some boards have startup glitches */
	while (tries--) {
		status = i2c_add_driver(&tps65010_driver);
		if (the_tps)
			break;
		i2c_del_driver(&tps65010_driver);
		if (!tries) {
			printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
			return -ENODEV;
		}
		pr_debug("%s: re-probe ...\n", DRIVER_NAME);
		msleep(10);
	}

#ifdef	CONFIG_ARM
	if (machine_is_omap_osk()) {

		// FIXME: More should be placed in the initialization code
		//	  of the submodules (DSP, ethernet, power management,
		//	  board-osk.c). Careful: I2C is initialized "late".

		/* Let LED1 (D9) blink */
		tps65010_set_led(LED1, BLINK);

		/* Disable LED 2 (D2) */
		tps65010_set_led(LED2, OFF);

		/* Set GPIO 1 HIGH to disable VBUS power supply;
		 * OHCI driver powers it up/down as needed.
		 */
		tps65010_set_gpio_out_value(GPIO1, HIGH);

		/* Set GPIO 2 low to turn on LED D3 */
		tps65010_set_gpio_out_value(GPIO2, HIGH);

		/* Set GPIO 3 low to take ethernet out of reset */
		tps65010_set_gpio_out_value(GPIO3, LOW);

		/* gpio4 for VDD_DSP */

		/* Enable LOW_PWR */
		tps65010_set_low_pwr(ON);

		/* Switch VLDO2 to 3.0V for AIC23 */
		tps65010_config_vregs1(TPS_LDO2_ENABLE | TPS_VLDO2_3_0V | TPS_LDO1_ENABLE);

	} else if (machine_is_omap_h2()) {
		/* gpio3 for SD, gpio4 for VDD_DSP */

		/* Enable LOW_PWR */
		tps65010_set_low_pwr(ON);
	} else if (machine_is_omap_h3()) {
		/* gpio4 for SD, gpio3 for VDD_DSP */
#ifdef CONFIG_PM
		/* Enable LOW_PWR */
		tps65013_set_low_pwr(ON);
#endif
	}
#endif

	return status;
}
/* NOTE:  this MUST be initialized before the other parts of the system
 * that rely on it ... but after the i2c bus on which this relies.
 * That is, much earlier than on PC-type systems, which don't often use
 * I2C as a core system bus.
 */
subsys_initcall(tps_init);

static void __exit tps_exit(void)
{
	i2c_del_driver(&tps65010_driver);
}
module_exit(tps_exit);