39e265cfc86d1af6eefb5362a9a7cc2f5cedf189
[~shefty/rdma-dev.git] / arch / arm / mach-pxa / corgi_pm.c
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
49 static void corgi_charger_init(void)
50 {
51         gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
52 }
53
54 static void corgi_measure_temp(int on)
55 {
56         gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
57 }
58
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
75 static void corgi_discharge(int on)
76 {
77         gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
78 }
79
80 static void corgi_presuspend(void)
81 {
82 }
83
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  */
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
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
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
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
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);