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  • only in /asuswrt-rt-n18u-9.0.0.4.380.2695/release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-pxa/
1/*
2 * Battery and Power Management code for the Sharp SL-C7xx
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/gpio.h>
18#include <linux/interrupt.h>
19#include <linux/platform_device.h>
20#include <linux/apm-emulation.h>
21
22#include <asm/irq.h>
23#include <asm/mach-types.h>
24#include <mach/hardware.h>
25
26#include <mach/corgi.h>
27#include <mach/pxa2xx-regs.h>
28#include <mach/sharpsl_pm.h>
29
30#include "generic.h"
31
32#define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
33#define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
34#define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
35#define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
36#define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
37#define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
38
39static struct gpio charger_gpios[] = {
40	{ CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
41	{ CORGI_GPIO_CHRG_ON,	  GPIOF_OUT_INIT_LOW, "Charger On" },
42	{ CORGI_GPIO_CHRG_UKN,	  GPIOF_OUT_INIT_LOW, "Charger Unknown" },
43	{ CORGI_GPIO_KEY_INT,	  GPIOF_IN, "Key Interrupt" },
44};
45
46static void corgi_charger_init(void)
47{
48	gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
49}
50
51static void corgi_measure_temp(int on)
52{
53	gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
54}
55
56static void corgi_charge(int on)
57{
58	if (on) {
59		if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
60			gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
61			gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
62		} else {
63			gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
64			gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
65		}
66	} else {
67		gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
68		gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
69	}
70}
71
72static void corgi_discharge(int on)
73{
74	gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
75}
76
77static void corgi_presuspend(void)
78{
79}
80
81static void corgi_postsuspend(void)
82{
83}
84
85/*
86 * Check what brought us out of the suspend.
87 * Return: 0 to sleep, otherwise wake
88 */
89static int corgi_should_wakeup(unsigned int resume_on_alarm)
90{
91	int is_resume = 0;
92
93	dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
94
95	if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
96		if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
97			/* charge on */
98			dev_dbg(sharpsl_pm.dev, "ac insert\n");
99			sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
100		} else {
101			/* charge off */
102			dev_dbg(sharpsl_pm.dev, "ac remove\n");
103			sharpsl_pm_led(SHARPSL_LED_OFF);
104			sharpsl_pm.machinfo->charge(0);
105			sharpsl_pm.charge_mode = CHRG_OFF;
106		}
107	}
108
109	if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
110		dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
111
112	if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
113		is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
114
115	if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
116		is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
117
118	if (resume_on_alarm && (PEDR & PWER_RTC))
119		is_resume |= PWER_RTC;
120
121	dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
122	return is_resume;
123}
124
125static unsigned long corgi_charger_wakeup(void)
126{
127	return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
128}
129
130unsigned long corgipm_read_devdata(int type)
131{
132	switch(type) {
133	case SHARPSL_STATUS_ACIN:
134		return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
135	case SHARPSL_STATUS_LOCK:
136		return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
137	case SHARPSL_STATUS_CHRGFULL:
138		return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
139	case SHARPSL_STATUS_FATAL:
140		return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
141	case SHARPSL_ACIN_VOLT:
142		return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
143	case SHARPSL_BATT_TEMP:
144		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
145	case SHARPSL_BATT_VOLT:
146	default:
147		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
148	}
149}
150
151static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
152	.init            = corgi_charger_init,
153	.exit            = NULL,
154	.gpio_batlock    = CORGI_GPIO_BAT_COVER,
155	.gpio_acin       = CORGI_GPIO_AC_IN,
156	.gpio_batfull    = CORGI_GPIO_CHRG_FULL,
157	.discharge       = corgi_discharge,
158	.charge          = corgi_charge,
159	.measure_temp    = corgi_measure_temp,
160	.presuspend      = corgi_presuspend,
161	.postsuspend     = corgi_postsuspend,
162	.read_devdata    = corgipm_read_devdata,
163	.charger_wakeup  = corgi_charger_wakeup,
164	.should_wakeup   = corgi_should_wakeup,
165#if defined(CONFIG_LCD_CORGI)
166	.backlight_limit = corgi_lcd_limit_intensity,
167#endif
168	.charge_on_volt	  = SHARPSL_CHARGE_ON_VOLT,
169	.charge_on_temp	  = SHARPSL_CHARGE_ON_TEMP,
170	.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
171	.charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
172	.fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
173	.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
174	.bat_levels       = 40,
175	.bat_levels_noac  = sharpsl_battery_levels_noac,
176	.bat_levels_acin  = sharpsl_battery_levels_acin,
177	.status_high_acin = 188,
178	.status_low_acin  = 178,
179	.status_high_noac = 185,
180	.status_low_noac  = 175,
181};
182
183static struct platform_device *corgipm_device;
184
185static int __devinit corgipm_init(void)
186{
187	int ret;
188
189	if (!machine_is_corgi() && !machine_is_shepherd()
190			&& !machine_is_husky())
191		return -ENODEV;
192
193	corgipm_device = platform_device_alloc("sharpsl-pm", -1);
194	if (!corgipm_device)
195		return -ENOMEM;
196
197	if (!machine_is_corgi())
198	    corgi_pm_machinfo.batfull_irq = 1;
199
200	corgipm_device->dev.platform_data = &corgi_pm_machinfo;
201	ret = platform_device_add(corgipm_device);
202
203	if (ret)
204		platform_device_put(corgipm_device);
205
206	return ret;
207}
208
209static void corgipm_exit(void)
210{
211	platform_device_unregister(corgipm_device);
212}
213
214module_init(corgipm_init);
215module_exit(corgipm_exit);
216