5e5bdc898482191548156b50ac5f324a491e4ae8
[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 static int spitz_last_ac_status;
31
32 static void spitz_charger_init(void)
33 {
34         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
35         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
36         sharpsl_pm_pxa_init();
37 }
38
39 static void spitz_measure_temp(int on)
40 {
41         if (on)
42                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
43         else
44                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
45 }
46
47 static void spitz_charge(int on)
48 {
49         if (on) {
50                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
51                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
52                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
53                 } else {
54                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
55                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
56                 }
57         } else {
58                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
59                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
60         }
61 }
62
63 static void spitz_discharge(int on)
64 {
65         if (on)
66                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
67         else
68                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
69 }
70
71 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
72    on the power bus which the green led on spitz provides */
73 static void spitz_discharge1(int on)
74 {
75         if (on)
76                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
77         else
78                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
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         /* Clear reset status */
114         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
115
116         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
117         PCFR = PCFR_GPR_EN | PCFR_OPDE;
118 }
119
120 static void spitz_postsuspend(void)
121 {
122         pxa_gpio_mode(GPIO18_RDY_MD);
123         pxa_gpio_mode(10 | GPIO_IN);
124 }
125
126 static int spitz_should_wakeup(unsigned int resume_on_alarm)
127 {
128         int is_resume = 0;
129         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
130
131         if (spitz_last_ac_status != acin) {
132                 if (acin) {
133                         /* charge on */
134                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
135                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
136                 } else {
137                         /* charge off */
138                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
139                         sharpsl_pm_led(SHARPSL_LED_OFF);
140                         sharpsl_pm.machinfo->charge(0);
141                         sharpsl_pm.charge_mode = CHRG_OFF;
142                 }
143                 spitz_last_ac_status = acin;
144                 /* Return to suspend as this must be what we were woken for */
145                 return 0;
146         }
147
148         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
149                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
150
151         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
152                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
153
154         if (resume_on_alarm && (PEDR & PWER_RTC))
155                 is_resume |= PWER_RTC;
156
157         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
158         return is_resume;
159 }
160
161 static unsigned long spitz_charger_wakeup(void)
162 {
163         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
164 }
165
166 unsigned long spitzpm_read_devdata(int type)
167 {
168         switch(type) {
169         case SHARPSL_STATUS_ACIN:
170                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
171         case SHARPSL_STATUS_LOCK:
172                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
173         case SHARPSL_STATUS_CHRGFULL:
174                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
175         case SHARPSL_STATUS_FATAL:
176                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
177         case SHARPSL_ACIN_VOLT:
178                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
179         case SHARPSL_BATT_TEMP:
180                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
181         case SHARPSL_BATT_VOLT:
182         default:
183                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
184         }
185 }
186
187 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
188         .init             = spitz_charger_init,
189         .exit             = sharpsl_pm_pxa_remove,
190         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
191         .gpio_acin        = SPITZ_GPIO_AC_IN,
192         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
193         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
194         .discharge        = spitz_discharge,
195         .discharge1       = spitz_discharge1,
196         .charge           = spitz_charge,
197         .measure_temp     = spitz_measure_temp,
198         .presuspend       = spitz_presuspend,
199         .postsuspend      = spitz_postsuspend,
200         .read_devdata     = spitzpm_read_devdata,
201         .charger_wakeup   = spitz_charger_wakeup,
202         .should_wakeup    = spitz_should_wakeup,
203         .bat_levels       = 40,
204         .bat_levels_noac  = spitz_battery_levels_noac,
205         .bat_levels_acin  = spitz_battery_levels_acin,
206         .status_high_acin = 188,
207         .status_low_acin  = 178,
208         .status_high_noac = 185,
209         .status_low_noac  = 175,
210 };
211
212 static struct platform_device *spitzpm_device;
213
214 static int __devinit spitzpm_init(void)
215 {
216         int ret;
217
218         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
219         if (!spitzpm_device)
220                 return -ENOMEM;
221
222         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
223         ret = platform_device_add(spitzpm_device);
224
225         if (ret)
226                 platform_device_put(spitzpm_device);
227
228         return ret;
229 }
230
231 static void spitzpm_exit(void)
232 {
233         platform_device_unregister(spitzpm_device);
234 }
235
236 module_init(spitzpm_init);
237 module_exit(spitzpm_exit);