[ARM] 3564/1: sharpsl_pm: Abstract some machine specific parameters
[linux-2.6.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/interrupt.h>
18 #include <linux/platform_device.h>
19 #include <asm/apm.h>
20 #include <asm/irq.h>
21 #include <asm/mach-types.h>
22 #include <asm/hardware.h>
23 #include <asm/hardware/scoop.h>
24
25 #include <asm/arch/sharpsl.h>
26 #include <asm/arch/spitz.h>
27 #include <asm/arch/pxa-regs.h>
28 #include "sharpsl.h"
29
30 #define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
31 #define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
32 #define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
33 #define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
34 #define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
35 #define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
36
37 static int spitz_last_ac_status;
38
39 static void spitz_charger_init(void)
40 {
41         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
42         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
43         sharpsl_pm_pxa_init();
44 }
45
46 static void spitz_measure_temp(int on)
47 {
48         if (on)
49                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
50         else
51                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
52 }
53
54 static void spitz_charge(int on)
55 {
56         if (on) {
57                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
58                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
59                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
60                 } else {
61                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
62                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
63                 }
64         } else {
65                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
66                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
67         }
68 }
69
70 static void spitz_discharge(int on)
71 {
72         if (on)
73                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
74         else
75                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
76 }
77
78 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
79    on the power bus which the green led on spitz provides */
80 static void spitz_discharge1(int on)
81 {
82         if (on)
83                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
84         else
85                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
86 }
87
88 static void spitz_presuspend(void)
89 {
90         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
91
92         /* GPIO Sleep Register */
93         PGSR0 = 0x00144018;
94         PGSR1 = 0x00EF0000;
95         if (machine_is_akita()) {
96                 PGSR2 = 0x2121C000;
97                 PGSR3 = 0x00600400;
98         } else {
99                 PGSR2 = 0x0121C000;
100                 PGSR3 = 0x00600000;
101         }
102
103         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
104         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
105         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
106         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
107         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
108
109         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
110
111         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
112         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
113         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
114         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
115         PKSR = 0xffffffff; // clear
116
117         /* nRESET_OUT Disable */
118         PSLR |= PSLR_SL_ROD;
119
120         /* Clear reset status */
121         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
122
123         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
124         PCFR = PCFR_GPR_EN | PCFR_OPDE;
125 }
126
127 static void spitz_postsuspend(void)
128 {
129         pxa_gpio_mode(GPIO18_RDY_MD);
130         pxa_gpio_mode(10 | GPIO_IN);
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         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
171 }
172
173 unsigned long spitzpm_read_devdata(int type)
174 {
175         switch(type) {
176         case SHARPSL_STATUS_ACIN:
177                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
178         case SHARPSL_STATUS_LOCK:
179                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
180         case SHARPSL_STATUS_CHRGFULL:
181                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
182         case SHARPSL_STATUS_FATAL:
183                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
184         case SHARPSL_ACIN_VOLT:
185                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
186         case SHARPSL_BATT_TEMP:
187                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
188         case SHARPSL_BATT_VOLT:
189         default:
190                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
191         }
192 }
193
194 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
195         .init             = spitz_charger_init,
196         .exit             = sharpsl_pm_pxa_remove,
197         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
198         .gpio_acin        = SPITZ_GPIO_AC_IN,
199         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
200         .batfull_irq      = 1,
201         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
202         .discharge        = spitz_discharge,
203         .discharge1       = spitz_discharge1,
204         .charge           = spitz_charge,
205         .measure_temp     = spitz_measure_temp,
206         .presuspend       = spitz_presuspend,
207         .postsuspend      = spitz_postsuspend,
208         .read_devdata     = spitzpm_read_devdata,
209         .charger_wakeup   = spitz_charger_wakeup,
210         .should_wakeup    = spitz_should_wakeup,
211         .backlight_limit  = corgibl_limit_intensity,
212         .charge_on_volt   = SHARPSL_CHARGE_ON_VOLT,
213         .charge_on_temp   = SHARPSL_CHARGE_ON_TEMP,
214         .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
215         .charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
216         .fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
217         .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
218         .bat_levels       = 40,
219         .bat_levels_noac  = spitz_battery_levels_noac,
220         .bat_levels_acin  = spitz_battery_levels_acin,
221         .status_high_acin = 188,
222         .status_low_acin  = 178,
223         .status_high_noac = 185,
224         .status_low_noac  = 175,
225 };
226
227 static struct platform_device *spitzpm_device;
228
229 static int __devinit spitzpm_init(void)
230 {
231         int ret;
232
233         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
234         if (!spitzpm_device)
235                 return -ENOMEM;
236
237         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
238         ret = platform_device_add(spitzpm_device);
239
240         if (ret)
241                 platform_device_put(spitzpm_device);
242
243         return ret;
244 }
245
246 static void spitzpm_exit(void)
247 {
248         platform_device_unregister(spitzpm_device);
249 }
250
251 module_init(spitzpm_init);
252 module_exit(spitzpm_exit);