arch/arm/mach-sa1100/collie_pm.c - maze/linux - Git at Google

 /*
  * Based on spitz_pm.c and sharp code.
  *
  * Copyright (C) 2001  SHARP
  * Copyright 2005 Pavel Machek <pavel@suse.cz>
  *
  * Distribute under GPLv2.
  *
  * Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
  * and sometimes charges them when it should not. If it makes angry lithium to come your way...
  * ...well, you have been warned.
  *
  * Actually, this should be quite safe, it seems sharp leaves charger enabled by default,
  * and my collie did not explode (yet).
  */

 #include <linux/module.h>
 #include <linux/stat.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/delay.h>
 #include <linux/interrupt.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>

 #include <asm/irq.h>
 #include <mach/hardware.h>
 #include <asm/hardware/scoop.h>
 #include <asm/dma.h>
 #include <mach/collie.h>
 #include <asm/mach/sharpsl_param.h>
 #include <asm/hardware/sharpsl_pm.h>

 #include "../drivers/mfd/ucb1x00.h"

 static struct ucb1x00 *ucb;
 static int ad_revise;

 #define ADCtoPower(x)	       ((330 * x * 2) / 1024)

 static void collie_charger_init(void)
 {
 	int err;

 	if (sharpsl_param.adadj != -1)
 		ad_revise = sharpsl_param.adadj;

 	/* Register interrupt handler. */
 	if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, IRQF_DISABLED,
 			       "ACIN", sharpsl_ac_isr))) {
 		printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
 		return;
 	}
 	if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, IRQF_DISABLED,
 			       "CO", sharpsl_chrg_full_isr))) {
 		free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
 		printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
 		return;
 	}

 	ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON | COLLIE_TC35143_GPIO_TMP_ON |
 			           COLLIE_TC35143_GPIO_BBAT_ON);
 	return;
 }

 static void collie_measure_temp(int on)
 {
 	if (on)
 		ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
 	else
 		ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
 }

 static void collie_charge(int on)
 {
 	extern struct platform_device colliescoop_device;

 	/* Zaurus seems to contain LTC1731; it should know when to
 	 * stop charging itself, so setting charge on should be
 	 * relatively harmless (as long as it is not done too often).
 	 */
 	if (on) {
 		set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
 	} else {
 		reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
 	}
 }

 static void collie_discharge(int on)
 {
 }

 static void collie_discharge1(int on)
 {
 }

 static void collie_presuspend(void)
 {
 }

 static void collie_postsuspend(void)
 {
 }

 static int collie_should_wakeup(unsigned int resume_on_alarm)
 {
 	return 0;
 }

 static unsigned long collie_charger_wakeup(void)
 {
 	return 0;
 }

 int collie_read_backup_battery(void)
 {
 	int voltage;

 	ucb1x00_adc_enable(ucb);

 	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
 	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

 	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
 	ucb1x00_adc_disable(ucb);

 	printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);

 	return ADCtoPower(voltage);
 }

 int collie_read_main_battery(void)
 {
 	int voltage, voltage_rev, voltage_volts;

 	ucb1x00_adc_enable(ucb);
 	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
 	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);

 	mdelay(1);
 	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

 	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
 	ucb1x00_adc_disable(ucb);

 	voltage_rev = voltage + ((ad_revise * voltage) / 652);
 	voltage_volts = ADCtoPower(voltage_rev);

 	printk("Main battery = %d(%d)\n", voltage_volts, voltage);

 	if (voltage != -1)
 		return voltage_volts;
 	else
 		return voltage;
 }

 int collie_read_temp(void)
 {
 	int voltage;

 	/* According to Sharp, temp must be > 973, main battery must be < 465,
 	   FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
 	   are way out of range? */

 	ucb1x00_adc_enable(ucb);
 	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
 	/* >1010 = battery removed, 460 = 22C ?, higher = lower temp ? */
 	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
 	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
 	ucb1x00_adc_disable(ucb);

 	printk("Battery temp = %d\n", voltage);
 	return voltage;
 }

 static unsigned long read_devdata(int which)
 {
 	switch (which) {
 	case SHARPSL_BATT_VOLT:
 		return collie_read_main_battery();
 	case SHARPSL_BATT_TEMP:
 		return collie_read_temp();
 	case SHARPSL_ACIN_VOLT:
 		return 500;
 	case SHARPSL_STATUS_ACIN: {
 		int ret = GPLR & COLLIE_GPIO_AC_IN;
 		printk("AC status = %d\n", ret);
 		return ret;
 	}
 	case SHARPSL_STATUS_FATAL: {
 		int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
 		printk("Fatal bat = %d\n", ret);
 		return ret;
 	}
 	default:
 		return ~0;
 	}
 }

 struct battery_thresh collie_battery_levels_acin[] = {
 	{ 420, 100},
 	{ 417,  95},
 	{ 415,  90},
 	{ 413,  80},
 	{ 411,  75},
 	{ 408,  70},
 	{ 406,  60},
 	{ 403,  50},
 	{ 398,  40},
 	{ 391,  25},
 	{  10,   5},
 	{   0,   0},
 };

 struct battery_thresh collie_battery_levels[] = {
 	{ 394, 100},
 	{ 390,  95},
 	{ 380,  90},
 	{ 370,  80},
 	{ 368,  75},	/* From sharp code: battery high with frontlight */
 	{ 366,  70},	/* 60..90 -- fake values invented by me for testing */
 	{ 364,  60},
 	{ 362,  50},
 	{ 360,  40},
 	{ 358,  25},	/* From sharp code: battery low with frontlight */
 	{ 356,   5},	/* From sharp code: battery verylow with frontlight */
 	{   0,   0},
 };

 struct sharpsl_charger_machinfo collie_pm_machinfo = {
 	.init             = collie_charger_init,
 	.read_devdata	  = read_devdata,
 	.discharge        = collie_discharge,
 	.discharge1       = collie_discharge1,
 	.charge           = collie_charge,
 	.measure_temp     = collie_measure_temp,
 	.presuspend       = collie_presuspend,
 	.postsuspend      = collie_postsuspend,
 	.charger_wakeup   = collie_charger_wakeup,
 	.should_wakeup    = collie_should_wakeup,
 	.bat_levels       = 12,
 	.bat_levels_noac  = collie_battery_levels,
 	.bat_levels_acin  = collie_battery_levels_acin,
 	.status_high_acin = 368,
 	.status_low_acin  = 358,
 	.status_high_noac = 368,
 	.status_low_noac  = 358,
 	.charge_on_volt	  = 350,	/* spitz uses 2.90V, but lets play it safe. */
 	.charge_on_temp   = 550,
 	.charge_acin_high = 550,	/* collie does not seem to have sensor for this, anyway */
 	.charge_acin_low  = 450,	/* ignored, too */
 	.fatal_acin_volt  = 356,
 	.fatal_noacin_volt = 356,

 	.batfull_irq = 1,		/* We do not want periodical charge restarts */
 };

 static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
 {
 	sharpsl_pm.machinfo = &collie_pm_machinfo;
 	ucb = pdev->ucb;
 	return 0;
 }

 static struct ucb1x00_driver collie_pm_ucb_driver = {
 	.add            = collie_pm_ucb_add,
 };

 static struct platform_device *collie_pm_device;

 static int __init collie_pm_init(void)
 {
         int ret;

         collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
         if (!collie_pm_device)
                 return -ENOMEM;

         collie_pm_device->dev.platform_data = &collie_pm_machinfo;
         ret = platform_device_add(collie_pm_device);

         if (ret)
                 platform_device_put(collie_pm_device);

 	if (!ret)
 		ret = ucb1x00_register_driver(&collie_pm_ucb_driver);

 	return ret;
 }

 static void __exit collie_pm_exit(void)
 {
 	ucb1x00_unregister_driver(&collie_pm_ucb_driver);
         platform_device_unregister(collie_pm_device);
 }

 module_init(collie_pm_init);
 module_exit(collie_pm_exit);
	/*
	* Based on spitz_pm.c and sharp code.
	*
	* Copyright (C) 2001 SHARP
	* Copyright 2005 Pavel Machek <pavel@suse.cz>
	*
	* Distribute under GPLv2.
	*
	* Li-ion batteries are angry beasts, and they like to explode. This driver is not finished,
	* and sometimes charges them when it should not. If it makes angry lithium to come your way...
	* ...well, you have been warned.
	*
	* Actually, this should be quite safe, it seems sharp leaves charger enabled by default,
	* and my collie did not explode (yet).
	*/

	#include <linux/module.h>
	#include <linux/stat.h>
	#include <linux/init.h>
	#include <linux/kernel.h>
	#include <linux/delay.h>
	#include <linux/interrupt.h>
	#include <linux/device.h>
	#include <linux/platform_device.h>

	#include <asm/irq.h>
	#include <mach/hardware.h>
	#include <asm/hardware/scoop.h>
	#include <asm/dma.h>
	#include <mach/collie.h>
	#include <asm/mach/sharpsl_param.h>
	#include <asm/hardware/sharpsl_pm.h>

	#include "../drivers/mfd/ucb1x00.h"

	static struct ucb1x00 *ucb;
	static int ad_revise;

	#define ADCtoPower(x) ((330 * x * 2) / 1024)

	static void collie_charger_init(void)
	{
	int err;

	if (sharpsl_param.adadj != -1)
	ad_revise = sharpsl_param.adadj;

	/* Register interrupt handler. */
	if ((err = request_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr, IRQF_DISABLED,
	"ACIN", sharpsl_ac_isr))) {
	printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_AC_IN);
	return;
	}
	if ((err = request_irq(COLLIE_IRQ_GPIO_CO, sharpsl_chrg_full_isr, IRQF_DISABLED,
	"CO", sharpsl_chrg_full_isr))) {
	free_irq(COLLIE_IRQ_GPIO_AC_IN, sharpsl_ac_isr);
	printk("Could not get irq %d.\n", COLLIE_IRQ_GPIO_CO);
	return;
	}

	ucb1x00_io_set_dir(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON \| COLLIE_TC35143_GPIO_TMP_ON \|
	COLLIE_TC35143_GPIO_BBAT_ON);
	return;
	}

	static void collie_measure_temp(int on)
	{
	if (on)
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
	else
	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
	}

	static void collie_charge(int on)
	{
	extern struct platform_device colliescoop_device;

	/* Zaurus seems to contain LTC1731; it should know when to
	* stop charging itself, so setting charge on should be
	* relatively harmless (as long as it is not done too often).
	*/
	if (on) {
	set_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
	} else {
	reset_scoop_gpio(&colliescoop_device.dev, COLLIE_SCP_CHARGE_ON);
	}
	}

	static void collie_discharge(int on)
	{
	}

	static void collie_discharge1(int on)
	{
	}

	static void collie_presuspend(void)
	{
	}

	static void collie_postsuspend(void)
	{
	}

	static int collie_should_wakeup(unsigned int resume_on_alarm)
	{
	return 0;
	}

	static unsigned long collie_charger_wakeup(void)
	{
	return 0;
	}

	int collie_read_backup_battery(void)
	{
	int voltage;

	ucb1x00_adc_enable(ucb);

	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_BBAT_ON, 0);
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
	ucb1x00_adc_disable(ucb);

	printk("Backup battery = %d(%d)\n", ADCtoPower(voltage), voltage);

	return ADCtoPower(voltage);
	}

	int collie_read_main_battery(void)
	{
	int voltage, voltage_rev, voltage_volts;

	ucb1x00_adc_enable(ucb);
	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_BBAT_ON);
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_MBAT_ON, 0);

	mdelay(1);
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD1, UCB_SYNC);

	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_MBAT_ON);
	ucb1x00_adc_disable(ucb);

	voltage_rev = voltage + ((ad_revise * voltage) / 652);
	voltage_volts = ADCtoPower(voltage_rev);

	printk("Main battery = %d(%d)\n", voltage_volts, voltage);

	if (voltage != -1)
	return voltage_volts;
	else
	return voltage;
	}

	int collie_read_temp(void)
	{
	int voltage;

	/* According to Sharp, temp must be > 973, main battery must be < 465,
	FIXME: sharpsl_pm.c has both conditions negated? FIXME: values
	are way out of range? */

	ucb1x00_adc_enable(ucb);
	ucb1x00_io_write(ucb, COLLIE_TC35143_GPIO_TMP_ON, 0);
	/* >1010 = battery removed, 460 = 22C ?, higher = lower temp ? */
	voltage = ucb1x00_adc_read(ucb, UCB_ADC_INP_AD0, UCB_SYNC);
	ucb1x00_io_write(ucb, 0, COLLIE_TC35143_GPIO_TMP_ON);
	ucb1x00_adc_disable(ucb);

	printk("Battery temp = %d\n", voltage);
	return voltage;
	}

	static unsigned long read_devdata(int which)
	{
	switch (which) {
	case SHARPSL_BATT_VOLT:
	return collie_read_main_battery();
	case SHARPSL_BATT_TEMP:
	return collie_read_temp();
	case SHARPSL_ACIN_VOLT:
	return 500;
	case SHARPSL_STATUS_ACIN: {
	int ret = GPLR & COLLIE_GPIO_AC_IN;
	printk("AC status = %d\n", ret);
	return ret;
	}
	case SHARPSL_STATUS_FATAL: {
	int ret = GPLR & COLLIE_GPIO_MAIN_BAT_LOW;
	printk("Fatal bat = %d\n", ret);
	return ret;
	}
	default:
	return ~0;
	}
	}

	struct battery_thresh collie_battery_levels_acin[] = {
	{ 420, 100},
	{ 417, 95},
	{ 415, 90},
	{ 413, 80},
	{ 411, 75},
	{ 408, 70},
	{ 406, 60},
	{ 403, 50},
	{ 398, 40},
	{ 391, 25},
	{ 10, 5},
	{ 0, 0},
	};

	struct battery_thresh collie_battery_levels[] = {
	{ 394, 100},
	{ 390, 95},
	{ 380, 90},
	{ 370, 80},
	{ 368, 75}, /* From sharp code: battery high with frontlight */
	{ 366, 70}, /* 60..90 -- fake values invented by me for testing */
	{ 364, 60},
	{ 362, 50},
	{ 360, 40},
	{ 358, 25}, /* From sharp code: battery low with frontlight */
	{ 356, 5}, /* From sharp code: battery verylow with frontlight */
	{ 0, 0},
	};

	struct sharpsl_charger_machinfo collie_pm_machinfo = {
	.init = collie_charger_init,
	.read_devdata = read_devdata,
	.discharge = collie_discharge,
	.discharge1 = collie_discharge1,
	.charge = collie_charge,
	.measure_temp = collie_measure_temp,
	.presuspend = collie_presuspend,
	.postsuspend = collie_postsuspend,
	.charger_wakeup = collie_charger_wakeup,
	.should_wakeup = collie_should_wakeup,
	.bat_levels = 12,
	.bat_levels_noac = collie_battery_levels,
	.bat_levels_acin = collie_battery_levels_acin,
	.status_high_acin = 368,
	.status_low_acin = 358,
	.status_high_noac = 368,
	.status_low_noac = 358,
	.charge_on_volt = 350, /* spitz uses 2.90V, but lets play it safe. */
	.charge_on_temp = 550,
	.charge_acin_high = 550, /* collie does not seem to have sensor for this, anyway */
	.charge_acin_low = 450, /* ignored, too */
	.fatal_acin_volt = 356,
	.fatal_noacin_volt = 356,

	.batfull_irq = 1, /* We do not want periodical charge restarts */
	};

	static int __init collie_pm_ucb_add(struct ucb1x00_dev *pdev)
	{
	sharpsl_pm.machinfo = &collie_pm_machinfo;
	ucb = pdev->ucb;
	return 0;
	}

	static struct ucb1x00_driver collie_pm_ucb_driver = {
	.add = collie_pm_ucb_add,
	};

	static struct platform_device *collie_pm_device;

	static int __init collie_pm_init(void)
	{
	int ret;

	collie_pm_device = platform_device_alloc("sharpsl-pm", -1);
	if (!collie_pm_device)
	return -ENOMEM;

	collie_pm_device->dev.platform_data = &collie_pm_machinfo;
	ret = platform_device_add(collie_pm_device);

	if (ret)
	platform_device_put(collie_pm_device);

	if (!ret)
	ret = ucb1x00_register_driver(&collie_pm_ucb_driver);

	return ret;
	}

	static void __exit collie_pm_exit(void)
	{
	ucb1x00_unregister_driver(&collie_pm_ucb_driver);
	platform_device_unregister(collie_pm_device);
	}

	module_init(collie_pm_init);
	module_exit(collie_pm_exit);