[ARM] 3228/1: SharpSL: Move PM code to arch/arm/common
[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 #include <asm/hardware/sharpsl_pm.h>
25
26 #include <asm/arch/sharpsl.h>
27 #include <asm/arch/spitz.h>
28 #include <asm/arch/pxa-regs.h>
29 #include "sharpsl.h"
30
31 static int spitz_last_ac_status;
32
33 static void spitz_charger_init(void)
34 {
35         pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
36         pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
37         sharpsl_pm_pxa_init();
38 }
39
40 static void spitz_measure_temp(int on)
41 {
42         if (on)
43                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
44         else
45                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
46 }
47
48 static void spitz_charge(int on)
49 {
50         if (on) {
51                 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
52                         set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
53                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
54                 } else {
55                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
56                         reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
57                 }
58         } else {
59                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
60                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
61         }
62 }
63
64 static void spitz_discharge(int on)
65 {
66         if (on)
67                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
68         else
69                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
70 }
71
72 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
73    on the power bus which the green led on spitz provides */
74 static void spitz_discharge1(int on)
75 {
76         if (on)
77                 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
78         else
79                 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
80 }
81
82 static void spitz_presuspend(void)
83 {
84         spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
85
86         /* GPIO Sleep Register */
87         PGSR0 = 0x00144018;
88         PGSR1 = 0x00EF0000;
89         if (machine_is_akita()) {
90                 PGSR2 = 0x2121C000;
91                 PGSR3 = 0x00600400;
92         } else {
93                 PGSR2 = 0x0121C000;
94                 PGSR3 = 0x00600000;
95         }
96
97         PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
98         PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
99         PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
100         PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
101         PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
102
103         pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
104
105         PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
106         PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
107         PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
108         PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
109         PKSR = 0xffffffff; // clear
110
111         /* nRESET_OUT Disable */
112         PSLR |= PSLR_SL_ROD;
113
114         /* Clear reset status */
115         RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
116
117         /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
118         PCFR = PCFR_GPR_EN | PCFR_OPDE;
119 }
120
121 static void spitz_postsuspend(void)
122 {
123         pxa_gpio_mode(GPIO18_RDY_MD);
124         pxa_gpio_mode(10 | GPIO_IN);
125 }
126
127 static int spitz_should_wakeup(unsigned int resume_on_alarm)
128 {
129         int is_resume = 0;
130         int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
131
132         if (spitz_last_ac_status != acin) {
133                 if (acin) {
134                         /* charge on */
135                         sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
136                         dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
137                 } else {
138                         /* charge off */
139                         dev_dbg(sharpsl_pm.dev, "AC Removed\n");
140                         sharpsl_pm_led(SHARPSL_LED_OFF);
141                         sharpsl_pm.machinfo->charge(0);
142                         sharpsl_pm.charge_mode = CHRG_OFF;
143                 }
144                 spitz_last_ac_status = acin;
145                 /* Return to suspend as this must be what we were woken for */
146                 return 0;
147         }
148
149         if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
150                 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
151
152         if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
153                 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
154
155         if (resume_on_alarm && (PEDR & PWER_RTC))
156                 is_resume |= PWER_RTC;
157
158         dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
159         return is_resume;
160 }
161
162 static unsigned long spitz_charger_wakeup(void)
163 {
164         return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
165 }
166
167 unsigned long spitzpm_read_devdata(int type)
168 {
169         switch(type) {
170         case SHARPSL_STATUS_ACIN:
171                 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
172         case SHARPSL_STATUS_LOCK:
173                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
174         case SHARPSL_STATUS_CHRGFULL:
175                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
176         case SHARPSL_STATUS_FATAL:
177                 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
178         case SHARPSL_ACIN_VOLT:
179                 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
180         case SHARPSL_BATT_TEMP:
181                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
182         case SHARPSL_BATT_VOLT:
183         default:
184                 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
185         }
186 }
187
188 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
189         .init             = spitz_charger_init,
190         .exit             = sharpsl_pm_pxa_remove,
191         .gpio_batlock     = SPITZ_GPIO_BAT_COVER,
192         .gpio_acin        = SPITZ_GPIO_AC_IN,
193         .gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
194         .gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
195         .discharge        = spitz_discharge,
196         .discharge1       = spitz_discharge1,
197         .charge           = spitz_charge,
198         .measure_temp     = spitz_measure_temp,
199         .presuspend       = spitz_presuspend,
200         .postsuspend      = spitz_postsuspend,
201         .read_devdata     = spitzpm_read_devdata,
202         .charger_wakeup   = spitz_charger_wakeup,
203         .should_wakeup    = spitz_should_wakeup,
204         .bat_levels       = 40,
205         .bat_levels_noac  = spitz_battery_levels_noac,
206         .bat_levels_acin  = spitz_battery_levels_acin,
207         .status_high_acin = 188,
208         .status_low_acin  = 178,
209         .status_high_noac = 185,
210         .status_low_noac  = 175,
211 };
212
213 static struct platform_device *spitzpm_device;
214
215 static int __devinit spitzpm_init(void)
216 {
217         int ret;
218
219         spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
220         if (!spitzpm_device)
221                 return -ENOMEM;
222
223         spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
224         ret = platform_device_add(spitzpm_device);
225
226         if (ret)
227                 platform_device_put(spitzpm_device);
228
229         return ret;
230 }
231
232 static void spitzpm_exit(void)
233 {
234         platform_device_unregister(spitzpm_device);
235 }
236
237 module_init(spitzpm_init);
238 module_exit(spitzpm_exit);