Merge commit 'v2.6.30-rc1' into sched/urgent
[linux-2.6] / 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/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <linux/apm-emulation.h>
20
21 #include <asm/irq.h>
22 #include <asm/mach-types.h>
23 #include <mach/hardware.h>
24
25 #include <mach/sharpsl.h>
26 #include <mach/spitz.h>
27 #include <mach/pxa2xx-regs.h>
28 #include <mach/pxa2xx-gpio.h>
29 #include "sharpsl.h"
30
31 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
32 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
33 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
34 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
35 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
36 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
37
38 static int spitz_last_ac_status;
39
40 static void spitz_charger_init(void)
41 {
42         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
43         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
44         sharpsl_pm_pxa_init();
45 }
46
47 static void spitz_measure_temp(int on)
48 {
49         gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
50 }
51
52 static void spitz_charge(int on)
53 {
54         if (on) {
55                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
56                         gpio_set_value(SPITZ_GPIO_JK_B, 1);
57                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
58                 } else {
59                         gpio_set_value(SPITZ_GPIO_JK_B, 0);
60                         gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
61                 }
62         } else {
63                 gpio_set_value(SPITZ_GPIO_JK_B, 0);
64                 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
65         }
66 }
67
68 static void spitz_discharge(int on)
69 {
70         gpio_set_value(SPITZ_GPIO_JK_A, on);
71 }
72
73 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
74    on the power bus which the green led on spitz provides */
75 static void spitz_discharge1(int on)
76 {
77         gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
78 }
79
80 static void spitz_presuspend(void)
81 {
82         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
83
84         /* GPIO Sleep Register */
85         PGSR0 = 0x00144018;
86         PGSR1 = 0x00EF0000;
87         if (machine_is_akita()) {
88                 PGSR2 = 0x2121C000;
89                 PGSR3 = 0x00600400;
90         } else {
91                 PGSR2 = 0x0121C000;
92                 PGSR3 = 0x00600000;
93         }
94
95         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
96         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
97         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
98         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
99         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
100
101         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
102
103         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
104         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
105         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
106         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
107         PKSR = 0xffffffff; // clear
108
109         /* nRESET_OUT Disable */
110         PSLR |= PSLR_SL_ROD;
111
112         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
113         PCFR = PCFR_GPR_EN | PCFR_OPDE;
114 }
115
116 static void spitz_postsuspend(void)
117 {
118         pxa_gpio_mode(GPIO18_RDY_MD);
119         pxa_gpio_mode(10 | GPIO_IN);
120 }
121
122 static int spitz_should_wakeup(unsigned int resume_on_alarm)
123 {
124         int is_resume = 0;
125         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
126
127         if (spitz_last_ac_status != acin) {
128                 if (acin) {
129                         /* charge on */
130                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
131                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
132                 } else {
133                         /* charge off */
134                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
135                         sharpsl_pm_led(SHARPSL_LED_OFF);
136                         sharpsl_pm.machinfo->charge(0);
137                         sharpsl_pm.charge_mode = CHRG_OFF;
138                 }
139                 spitz_last_ac_status = acin;
140                 /* Return to suspend as this must be what we were woken for */
141                 return 0;
142         }
143
144         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
145                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
146
147         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
148                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
149
150         if (resume_on_alarm && (PEDR & PWER_RTC))
151                 is_resume |= PWER_RTC;
152
153         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
154         return is_resume;
155 }
156
157 static unsigned long spitz_charger_wakeup(void)
158 {
159         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
160 }
161
162 unsigned long spitzpm_read_devdata(int type)
163 {
164         switch(type) {
165         case SHARPSL_STATUS_ACIN:
166                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
167         case SHARPSL_STATUS_LOCK:
168                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
169         case SHARPSL_STATUS_CHRGFULL:
170                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
171         case SHARPSL_STATUS_FATAL:
172                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
173         case SHARPSL_ACIN_VOLT:
174                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
175         case SHARPSL_BATT_TEMP:
176                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
177         case SHARPSL_BATT_VOLT:
178         default:
179                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
180         }
181 }
182
183 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
184         .init             = spitz_charger_init,
185         .exit             = sharpsl_pm_pxa_remove,
186         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
187         .gpio_acin        = SPITZ_GPIO_AC_IN,
188         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
189         .batfull_irq      = 1,
190         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
191         .discharge        = spitz_discharge,
192         .discharge1       = spitz_discharge1,
193         .charge           = spitz_charge,
194         .measure_temp     = spitz_measure_temp,
195         .presuspend       = spitz_presuspend,
196         .postsuspend      = spitz_postsuspend,
197         .read_devdata     = spitzpm_read_devdata,
198         .charger_wakeup   = spitz_charger_wakeup,
199         .should_wakeup    = spitz_should_wakeup,
200 #if defined(CONFIG_LCD_CORGI)
201         .backlight_limit = corgi_lcd_limit_intensity,
202 #elif defined(CONFIG_BACKLIGHT_CORGI)
203         .backlight_limit  = corgibl_limit_intensity,
204 #endif
205         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
206         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
207         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
208         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
209         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
210         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
211         .bat_levels       = 40,
212         .bat_levels_noac  = spitz_battery_levels_noac,
213         .bat_levels_acin  = spitz_battery_levels_acin,
214         .status_high_acin = 188,
215         .status_low_acin  = 178,
216         .status_high_noac = 185,
217         .status_low_noac  = 175,
218 };
219
220 static struct platform_device *spitzpm_device;
221
222 static int __devinit spitzpm_init(void)
223 {
224         int ret;
225
226         if (!machine_is_spitz() && !machine_is_akita()
227                         && !machine_is_borzoi())
228                 return -ENODEV;
229
230         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
231         if (!spitzpm_device)
232                 return -ENOMEM;
233
234         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
235         ret = platform_device_add(spitzpm_device);
236
237         if (ret)
238                 platform_device_put(spitzpm_device);
239
240         return ret;
241 }
242
243 static void spitzpm_exit(void)
244 {
245         platform_device_unregister(spitzpm_device);
246 }
247
248 module_init(spitzpm_init);
249 module_exit(spitzpm_exit);