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/gpio-pxa.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/apm-emulation.h>
22
23 #include <asm/irq.h>
24 #include <asm/mach-types.h>
25 #include <mach/hardware.h>
26
27 #include <mach/corgi.h>
28 #include <mach/pxa2xx-regs.h>
29 #include <mach/sharpsl_pm.h>
30
31 #include "generic.h"
32
33 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
34 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
35 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
36 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
37 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
38 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
39
40 static struct gpio charger_gpios[] = {
41 { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
42 { CORGI_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
43 { CORGI_GPIO_CHRG_UKN, GPIOF_OUT_INIT_LOW, "Charger Unknown" },
44 { CORGI_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
45 { CORGI_GPIO_KEY_INT, GPIOF_IN, "Key Interrupt" },
46 { CORGI_GPIO_WAKEUP, GPIOF_IN, "System wakeup notification" },
47 };
48
corgi_charger_init(void)49 static void corgi_charger_init(void)
50 {
51 gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
52 }
53
corgi_measure_temp(int on)54 static void corgi_measure_temp(int on)
55 {
56 gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
57 }
58
corgi_charge(int on)59 static void corgi_charge(int on)
60 {
61 if (on) {
62 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
63 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
64 gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
65 } else {
66 gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
67 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
68 }
69 } else {
70 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
71 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
72 }
73 }
74
corgi_discharge(int on)75 static void corgi_discharge(int on)
76 {
77 gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
78 }
79
corgi_presuspend(void)80 static void corgi_presuspend(void)
81 {
82 }
83
corgi_postsuspend(void)84 static void corgi_postsuspend(void)
85 {
86 }
87
88 /*
89 * Check what brought us out of the suspend.
90 * Return: 0 to sleep, otherwise wake
91 */
corgi_should_wakeup(unsigned int resume_on_alarm)92 static int corgi_should_wakeup(unsigned int resume_on_alarm)
93 {
94 int is_resume = 0;
95
96 dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
97 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
98 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
99 gpio_get_value(CORGI_GPIO_CHRG_FULL),
100 gpio_get_value(CORGI_GPIO_KEY_INT),
101 gpio_get_value(CORGI_GPIO_WAKEUP));
102
103 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
104 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
105 /* charge on */
106 dev_dbg(sharpsl_pm.dev, "ac insert\n");
107 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
108 } else {
109 /* charge off */
110 dev_dbg(sharpsl_pm.dev, "ac remove\n");
111 sharpsl_pm_led(SHARPSL_LED_OFF);
112 sharpsl_pm.machinfo->charge(0);
113 sharpsl_pm.charge_mode = CHRG_OFF;
114 }
115 }
116
117 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
118 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
119
120 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
121 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
122
123 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
124 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
125
126 if (resume_on_alarm && (PEDR & PWER_RTC))
127 is_resume |= PWER_RTC;
128
129 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
130 return is_resume;
131 }
132
corgi_charger_wakeup(void)133 static unsigned long corgi_charger_wakeup(void)
134 {
135 unsigned long ret;
136
137 ret = (!gpio_get_value(CORGI_GPIO_AC_IN) << GPIO_bit(CORGI_GPIO_AC_IN))
138 | (!gpio_get_value(CORGI_GPIO_KEY_INT)
139 << GPIO_bit(CORGI_GPIO_KEY_INT))
140 | (!gpio_get_value(CORGI_GPIO_WAKEUP)
141 << GPIO_bit(CORGI_GPIO_WAKEUP));
142 return ret;
143 }
144
corgipm_read_devdata(int type)145 unsigned long corgipm_read_devdata(int type)
146 {
147 switch(type) {
148 case SHARPSL_STATUS_ACIN:
149 return !gpio_get_value(CORGI_GPIO_AC_IN);
150 case SHARPSL_STATUS_LOCK:
151 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
152 case SHARPSL_STATUS_CHRGFULL:
153 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
154 case SHARPSL_STATUS_FATAL:
155 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
156 case SHARPSL_ACIN_VOLT:
157 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
158 case SHARPSL_BATT_TEMP:
159 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
160 case SHARPSL_BATT_VOLT:
161 default:
162 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
163 }
164 }
165
166 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
167 .init = corgi_charger_init,
168 .exit = NULL,
169 .gpio_batlock = CORGI_GPIO_BAT_COVER,
170 .gpio_acin = CORGI_GPIO_AC_IN,
171 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
172 .discharge = corgi_discharge,
173 .charge = corgi_charge,
174 .measure_temp = corgi_measure_temp,
175 .presuspend = corgi_presuspend,
176 .postsuspend = corgi_postsuspend,
177 .read_devdata = corgipm_read_devdata,
178 .charger_wakeup = corgi_charger_wakeup,
179 .should_wakeup = corgi_should_wakeup,
180 #if defined(CONFIG_LCD_CORGI)
181 .backlight_limit = corgi_lcd_limit_intensity,
182 #endif
183 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
184 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
185 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
186 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
187 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
188 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
189 .bat_levels = 40,
190 .bat_levels_noac = sharpsl_battery_levels_noac,
191 .bat_levels_acin = sharpsl_battery_levels_acin,
192 .status_high_acin = 188,
193 .status_low_acin = 178,
194 .status_high_noac = 185,
195 .status_low_noac = 175,
196 };
197
198 static struct platform_device *corgipm_device;
199
corgipm_init(void)200 static int __devinit corgipm_init(void)
201 {
202 int ret;
203
204 if (!machine_is_corgi() && !machine_is_shepherd()
205 && !machine_is_husky())
206 return -ENODEV;
207
208 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
209 if (!corgipm_device)
210 return -ENOMEM;
211
212 if (!machine_is_corgi())
213 corgi_pm_machinfo.batfull_irq = 1;
214
215 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
216 ret = platform_device_add(corgipm_device);
217
218 if (ret)
219 platform_device_put(corgipm_device);
220
221 return ret;
222 }
223
corgipm_exit(void)224 static void corgipm_exit(void)
225 {
226 platform_device_unregister(corgipm_device);
227 }
228
229 module_init(corgipm_init);
230 module_exit(corgipm_exit);
231