[mirror_ubuntu-bionic-kernel.git] / arch / arm / mach-pxa / spitz_pm.c

/*
 * Battery and Power Management code for the Sharp SL-Cxx00
 *
 * Copyright (c) 2005 Richard Purdie
 *
 * 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.
 *
 */

#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/platform_device.h>
#include <asm/apm.h>
#include <asm/irq.h>
#include <asm/mach-types.h>
#include <asm/hardware.h>
#include <asm/hardware/scoop.h>

#include <asm/arch/sharpsl.h>
#include <asm/arch/spitz.h>
#include <asm/arch/pxa-regs.h>
#include "sharpsl.h"

static int spitz_last_ac_status;

static void spitz_charger_init(void)
{
	pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
	pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
	sharpsl_pm_pxa_init();
}

static void spitz_measure_temp(int on)
{
	if (on)
		set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
	else
		reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
}

static void spitz_charge(int on)
{
	if (on) {
		if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
			set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
			reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
		} else {
			reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
			reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
		}
	} else {
		reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
		set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
	}
}

static void spitz_discharge(int on)
{
	if (on)
		set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
	else
		reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
}

/* HACK - For unknown reasons, accurate voltage readings are only made with a load
   on the power bus which the green led on spitz provides */
static void spitz_discharge1(int on)
{
	if (on)
		set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
	else
		reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
}

static void spitz_presuspend(void)
{
	spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);

	/* GPIO Sleep Register */
	PGSR0 = 0x00144018;
	PGSR1 = 0x00EF0000;
	if (machine_is_akita()) {
		PGSR2 = 0x2121C000;
		PGSR3 = 0x00600400;
	} else {
		PGSR2 = 0x0121C000;
		PGSR3 = 0x00600000;
	}

	PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
	PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
	PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
	PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
	PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);

	pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);

	PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
	PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
	PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
	PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
	PKSR = 0xffffffff; // clear

	/* nRESET_OUT Disable */
	PSLR |= PSLR_SL_ROD;

	/* Clear reset status */
	RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;

	/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
	PCFR = PCFR_GPR_EN | PCFR_OPDE;
}

static void spitz_postsuspend(void)
{
	pxa_gpio_mode(GPIO18_RDY_MD);
	pxa_gpio_mode(10 | GPIO_IN);
}

static int spitz_should_wakeup(unsigned int resume_on_alarm)
{
	int is_resume = 0;
	int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);

	if (spitz_last_ac_status != acin) {
		if (acin) {
			/* charge on */
			sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
			dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
		} else {
			/* charge off */
			dev_dbg(sharpsl_pm.dev, "AC Removed\n");
			sharpsl_pm_led(SHARPSL_LED_OFF);
			sharpsl_pm.machinfo->charge(0);
			sharpsl_pm.charge_mode = CHRG_OFF;
		}
		spitz_last_ac_status = acin;
		/* Return to suspend as this must be what we were woken for */
		return 0;
	}

	if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
		is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);

	if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
		is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);

	if (resume_on_alarm && (PEDR & PWER_RTC))
		is_resume |= PWER_RTC;

	dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
	return is_resume;
}

static unsigned long spitz_charger_wakeup(void)
{
	return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
}

unsigned long spitzpm_read_devdata(int type)
{
	switch(type) {
	case SHARPSL_STATUS_ACIN:
		return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
	case SHARPSL_STATUS_LOCK:
		return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
	case SHARPSL_STATUS_CHRGFULL:
		return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
	case SHARPSL_STATUS_FATAL:
		return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
	case SHARPSL_ACIN_VOLT:
		return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
	case SHARPSL_BATT_TEMP:
		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
	case SHARPSL_BATT_VOLT:
	default:
		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
	}
}

struct sharpsl_charger_machinfo spitz_pm_machinfo = {
	.init             = spitz_charger_init,
	.exit             = sharpsl_pm_pxa_remove,
	.gpio_batlock     = SPITZ_GPIO_BAT_COVER,
	.gpio_acin        = SPITZ_GPIO_AC_IN,
	.gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
	.gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
	.discharge        = spitz_discharge,
	.discharge1       = spitz_discharge1,
	.charge           = spitz_charge,
	.measure_temp     = spitz_measure_temp,
	.presuspend       = spitz_presuspend,
	.postsuspend      = spitz_postsuspend,
	.read_devdata     = spitzpm_read_devdata,
	.charger_wakeup   = spitz_charger_wakeup,
	.should_wakeup    = spitz_should_wakeup,
	.bat_levels       = 40,
	.bat_levels_noac  = spitz_battery_levels_noac,
	.bat_levels_acin  = spitz_battery_levels_acin,
	.status_high_acin = 188,
	.status_low_acin  = 178,
	.status_high_noac = 185,
	.status_low_noac  = 175,
};

static struct platform_device *spitzpm_device;

static int __devinit spitzpm_init(void)
{
	int ret;

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

	spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
	ret = platform_device_add(spitzpm_device);

	if (ret)
		platform_device_put(spitzpm_device);

	return ret;
}

static void spitzpm_exit(void)
{
 	platform_device_unregister(spitzpm_device);
}

module_init(spitzpm_init);
module_exit(spitzpm_exit);
Commit	Line	Data
e8b6f7f4 RP	1	/*
	2	* Battery and Power Management code for the Sharp SL-Cxx00
	3	*
	4	* Copyright (c) 2005 Richard Purdie
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License version 2 as
	8	* published by the Free Software Foundation.
	9	*
	10	*/
	11
	12	#include <linux/module.h>
	13	#include <linux/stat.h>
	14	#include <linux/init.h>
	15	#include <linux/kernel.h>
	16	#include <linux/delay.h>
	17	#include <linux/interrupt.h>
	18	#include <linux/platform_device.h>
	19	#include <asm/apm.h>
	20	#include <asm/irq.h>
	21	#include <asm/mach-types.h>
	22	#include <asm/hardware.h>
	23	#include <asm/hardware/scoop.h>
	24
	25	#include <asm/arch/sharpsl.h>
	26	#include <asm/arch/spitz.h>
	27	#include <asm/arch/pxa-regs.h>
	28	#include "sharpsl.h"
	29
	30	static int spitz_last_ac_status;
	31
	32	static void spitz_charger_init(void)
	33	{
	34	pxa_gpio_mode(SPITZ_GPIO_KEY_INT \| GPIO_IN);
	35	pxa_gpio_mode(SPITZ_GPIO_SYNC \| GPIO_IN);
b7557de4	36	sharpsl_pm_pxa_init();
e8b6f7f4 RP	37	}
	38
	39	static void spitz_measure_temp(int on)
	40	{
	41	if (on)
	42	set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
	43	else
	44	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
	45	}
	46
	47	static void spitz_charge(int on)
	48	{
	49	if (on) {
	50	if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
	51	set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
	52	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
	53	} else {
	54	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
	55	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
	56	}
	57	} else {
	58	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
	59	set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
	60	}
	61	}
	62
	63	static void spitz_discharge(int on)
	64	{
	65	if (on)
	66	set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
	67	else
	68	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
	69	}
	70
	71	/* HACK - For unknown reasons, accurate voltage readings are only made with a load
	72	on the power bus which the green led on spitz provides */
	73	static void spitz_discharge1(int on)
	74	{
	75	if (on)
	76	set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
	77	else
	78	reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
	79	}
	80
	81	static void spitz_presuspend(void)
	82	{
b7557de4	83	spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
e8b6f7f4 RP	84
	85	/* GPIO Sleep Register */
	86	PGSR0 = 0x00144018;
	87	PGSR1 = 0x00EF0000;
	88	if (machine_is_akita()) {
	89	PGSR2 = 0x2121C000;
	90	PGSR3 = 0x00600400;
	91	} else {
	92	PGSR2 = 0x0121C000;
	93	PGSR3 = 0x00600000;
	94	}
	95
	96	PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
	97	PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
	98	PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
	99	PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
	100	PGSR2 \|= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
	101
	102	pxa_gpio_mode(GPIO18_RDY\|GPIO_OUT \| GPIO_DFLT_HIGH);
	103
	104	PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
	105	PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) \| GPIO_bit(SPITZ_GPIO_RESET);
	106	PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) \| GPIO_bit(SPITZ_GPIO_RESET) \| PWER_RTC;
	107	PKWR = GPIO_bit(SPITZ_GPIO_SYNC) \| GPIO_bit(SPITZ_GPIO_KEY_INT) \| GPIO_bit(SPITZ_GPIO_RESET);
	108	PKSR = 0xffffffff; // clear
	109
	110	/* nRESET_OUT Disable */
	111	PSLR \|= PSLR_SL_ROD;
	112
	113	/* Clear reset status */
	114	RCSR = RCSR_HWR \| RCSR_WDR \| RCSR_SMR \| RCSR_GPR;
	115
	116	/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
	117	PCFR = PCFR_GPR_EN \| PCFR_OPDE;
	118	}
	119
	120	static void spitz_postsuspend(void)
	121	{
	122	pxa_gpio_mode(GPIO18_RDY_MD);
	123	pxa_gpio_mode(10 \| GPIO_IN);
	124	}
	125
	126	static int spitz_should_wakeup(unsigned int resume_on_alarm)
	127	{
	128	int is_resume = 0;
b7557de4	129	int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
e8b6f7f4 RP	130
	131	if (spitz_last_ac_status != acin) {
	132	if (acin) {
	133	/* charge on */
	134	sharpsl_pm.flags \|= SHARPSL_DO_OFFLINE_CHRG;
	135	dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
	136	} else {
	137	/* charge off */
	138	dev_dbg(sharpsl_pm.dev, "AC Removed\n");
b7557de4 RP	139	sharpsl_pm_led(SHARPSL_LED_OFF);
b7557de4 RP	140	sharpsl_pm.machinfo->charge(0);
e8b6f7f4 RP	141	sharpsl_pm.charge_mode = CHRG_OFF;
	142	}
	143	spitz_last_ac_status = acin;
	144	/* Return to suspend as this must be what we were woken for */
	145	return 0;
	146	}
	147
	148	if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
	149	is_resume \|= GPIO_bit(SPITZ_GPIO_KEY_INT);
	150
	151	if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
	152	is_resume \|= GPIO_bit(SPITZ_GPIO_SYNC);
	153
	154	if (resume_on_alarm && (PEDR & PWER_RTC))
	155	is_resume \|= PWER_RTC;
	156
	157	dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
	158	return is_resume;
	159	}
	160
	161	static unsigned long spitz_charger_wakeup(void)
	162	{
	163	return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) \| (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
	164	}
	165
b7557de4	166	unsigned long spitzpm_read_devdata(int type)
e8b6f7f4	167	{
b7557de4 RP	168	switch(type) {
	169	case SHARPSL_STATUS_ACIN:
	170	return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
	171	case SHARPSL_STATUS_LOCK:
	172	return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
	173	case SHARPSL_STATUS_CHRGFULL:
	174	return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
	175	case SHARPSL_STATUS_FATAL:
	176	return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
	177	case SHARPSL_ACIN_VOLT:
	178	return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
	179	case SHARPSL_BATT_TEMP:
	180	return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
	181	case SHARPSL_BATT_VOLT:
	182	default:
	183	return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
	184	}
e8b6f7f4 RP	185	}
	186
	187	struct sharpsl_charger_machinfo spitz_pm_machinfo = {
	188	.init = spitz_charger_init,
b7557de4	189	.exit = sharpsl_pm_pxa_remove,
e8b6f7f4 RP	190	.gpio_batlock = SPITZ_GPIO_BAT_COVER,
	191	.gpio_acin = SPITZ_GPIO_AC_IN,
	192	.gpio_batfull = SPITZ_GPIO_CHRG_FULL,
	193	.gpio_fatal = SPITZ_GPIO_FATAL_BAT,
e8b6f7f4 RP	194	.discharge = spitz_discharge,
	195	.discharge1 = spitz_discharge1,
	196	.charge = spitz_charge,
e8b6f7f4 RP	197	.measure_temp = spitz_measure_temp,
	198	.presuspend = spitz_presuspend,
	199	.postsuspend = spitz_postsuspend,
b7557de4	200	.read_devdata = spitzpm_read_devdata,
e8b6f7f4 RP	201	.charger_wakeup = spitz_charger_wakeup,
	202	.should_wakeup = spitz_should_wakeup,
	203	.bat_levels = 40,
	204	.bat_levels_noac = spitz_battery_levels_noac,
	205	.bat_levels_acin = spitz_battery_levels_acin,
	206	.status_high_acin = 188,
	207	.status_low_acin = 178,
	208	.status_high_noac = 185,
	209	.status_low_noac = 175,
	210	};
	211
	212	static struct platform_device *spitzpm_device;
	213
	214	static int __devinit spitzpm_init(void)
	215	{
	216	int ret;
	217
	218	spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
	219	if (!spitzpm_device)
	220	return -ENOMEM;
	221
	222	spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
	223	ret = platform_device_add(spitzpm_device);
	224
	225	if (ret)
	226	platform_device_put(spitzpm_device);
	227
	228	return ret;
	229	}
	230
	231	static void spitzpm_exit(void)
	232	{
	233	platform_device_unregister(spitzpm_device);
	234	}
	235
	236	module_init(spitzpm_init);
	237	module_exit(spitzpm_exit);