842596d4d31e19e59cd898084125944a03db7b90
[linux-3.10.git] / arch / arm / mach-pxa / spitz_pm.c
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/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/spitz.h>
28 #include <mach/pxa27x.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 int spitz_last_ac_status;
41
42 static struct gpio spitz_charger_gpios[] = {
43         { SPITZ_GPIO_KEY_INT,   GPIOF_IN, "Keyboard Interrupt" },
44         { SPITZ_GPIO_SYNC,      GPIOF_IN, "Sync" },
45         { SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
46         { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
47         { SPITZ_GPIO_JK_B,        GPIOF_OUT_INIT_LOW, "JK B" },
48         { SPITZ_GPIO_CHRG_ON,     GPIOF_OUT_INIT_LOW, "Charger On" },
49 };
50
51 static void spitz_charger_init(void)
52 {
53         gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
54 }
55
56 static void spitz_measure_temp(int on)
57 {
58         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
59 }
60
61 static void spitz_charge(int on)
62 {
63         if (on) {
64                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
65                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
66                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
67                 } else {
68                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
69                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
70                 }
71         } else {
72                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
73                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
74         }
75 }
76
77 static void spitz_discharge(int on)
78 {
79         gpio_set_value(SPITZ_GPIO_JK_A, on);
80 }
81
82 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
83    on the power bus which the green led on spitz provides */
84 static void spitz_discharge1(int on)
85 {
86         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
87 }
88
89 static unsigned long gpio18_config = GPIO18_GPIO;
90
91 static void spitz_presuspend(void)
92 {
93         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
94
95         /* GPIO Sleep Register */
96         PGSR0 = 0x00144018;
97         PGSR1 = 0x00EF0000;
98         if (machine_is_akita()) {
99                 PGSR2 = 0x2121C000;
100                 PGSR3 = 0x00600400;
101         } else {
102                 PGSR2 = 0x0121C000;
103                 PGSR3 = 0x00600000;
104         }
105
106         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
107         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
108         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
109         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
110         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
111
112         pxa2xx_mfp_config(&gpio18_config, 1);
113         gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
114         gpio_free(18);
115
116         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
117         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
118         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
119         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
120         PKSR = 0xffffffff; /* clear */
121
122         /* nRESET_OUT Disable */
123         PSLR |= PSLR_SL_ROD;
124
125         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
126         PCFR = PCFR_GPR_EN | PCFR_OPDE;
127 }
128
129 static void spitz_postsuspend(void)
130 {
131 }
132
133 static int spitz_should_wakeup(unsigned int resume_on_alarm)
134 {
135         int is_resume = 0;
136         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
137
138         if (spitz_last_ac_status != acin) {
139                 if (acin) {
140                         /* charge on */
141                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
142                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
143                 } else {
144                         /* charge off */
145                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
146                         sharpsl_pm_led(SHARPSL_LED_OFF);
147                         sharpsl_pm.machinfo->charge(0);
148                         sharpsl_pm.charge_mode = CHRG_OFF;
149                 }
150                 spitz_last_ac_status = acin;
151                 /* Return to suspend as this must be what we were woken for */
152                 return 0;
153         }
154
155         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
156                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
157
158         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
159                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
160
161         if (resume_on_alarm && (PEDR & PWER_RTC))
162                 is_resume |= PWER_RTC;
163
164         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
165         return is_resume;
166 }
167
168 static unsigned long spitz_charger_wakeup(void)
169 {
170         unsigned long ret;
171         ret = ((!gpio_get_value(SPITZ_GPIO_KEY_INT)
172                 << GPIO_bit(SPITZ_GPIO_KEY_INT))
173                 | gpio_get_value(SPITZ_GPIO_SYNC));
174         return ret;
175 }
176
177 unsigned long spitzpm_read_devdata(int type)
178 {
179         switch (type) {
180         case SHARPSL_STATUS_ACIN:
181                 return !gpio_get_value(SPITZ_GPIO_AC_IN);
182         case SHARPSL_STATUS_LOCK:
183                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
184         case SHARPSL_STATUS_CHRGFULL:
185                 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
186         case SHARPSL_STATUS_FATAL:
187                 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
188         case SHARPSL_ACIN_VOLT:
189                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
190         case SHARPSL_BATT_TEMP:
191                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
192         case SHARPSL_BATT_VOLT:
193         default:
194                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
195         }
196 }
197
198 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
199         .init             = spitz_charger_init,
200         .exit             = NULL,
201         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
202         .gpio_acin        = SPITZ_GPIO_AC_IN,
203         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
204         .batfull_irq      = 1,
205         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
206         .discharge        = spitz_discharge,
207         .discharge1       = spitz_discharge1,
208         .charge           = spitz_charge,
209         .measure_temp     = spitz_measure_temp,
210         .presuspend       = spitz_presuspend,
211         .postsuspend      = spitz_postsuspend,
212         .read_devdata     = spitzpm_read_devdata,
213         .charger_wakeup   = spitz_charger_wakeup,
214         .should_wakeup    = spitz_should_wakeup,
215 #if defined(CONFIG_LCD_CORGI)
216         .backlight_limit = corgi_lcd_limit_intensity,
217 #endif
218         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
219         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
220         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
221         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
222         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
223         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
224         .bat_levels       = 40,
225         .bat_levels_noac  = sharpsl_battery_levels_noac,
226         .bat_levels_acin  = sharpsl_battery_levels_acin,
227         .status_high_acin = 188,
228         .status_low_acin  = 178,
229         .status_high_noac = 185,
230         .status_low_noac  = 175,
231 };
232
233 static struct platform_device *spitzpm_device;
234
235 static int __devinit spitzpm_init(void)
236 {
237         int ret;
238
239         if (!machine_is_spitz() && !machine_is_akita()
240                         && !machine_is_borzoi())
241                 return -ENODEV;
242
243         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
244         if (!spitzpm_device)
245                 return -ENOMEM;
246
247         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
248         ret = platform_device_add(spitzpm_device);
249
250         if (ret)
251                 platform_device_put(spitzpm_device);
252
253         return ret;
254 }
255
256 static void spitzpm_exit(void)
257 {
258         platform_device_unregister(spitzpm_device);
259 }
260
261 module_init(spitzpm_init);
262 module_exit(spitzpm_exit);