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