Linux 2.6.25-rc4
[linux-2.6/next.git] / arch / arm / mach-pxa / spitz_pm.c
blob745a4dc7acdde6dc2fe4918c427178aac1a5f546
1 /*
2 * Battery and Power Management code for the Sharp SL-Cxx00
4 * Copyright (c) 2005 Richard Purdie
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.
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>
21 #include <asm/irq.h>
22 #include <asm/mach-types.h>
23 #include <asm/hardware.h>
24 #include <asm/hardware/scoop.h>
26 #include <asm/arch/sharpsl.h>
27 #include <asm/arch/spitz.h>
28 #include <asm/arch/pxa-regs.h>
29 #include "sharpsl.h"
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 */
38 static int spitz_last_ac_status;
40 static void spitz_charger_init(void)
42 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
43 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
44 sharpsl_pm_pxa_init();
47 static void spitz_measure_temp(int on)
49 if (on)
50 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
51 else
52 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
55 static void spitz_charge(int on)
57 if (on) {
58 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
59 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
60 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
61 } else {
62 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
63 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
65 } else {
66 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
67 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
71 static void spitz_discharge(int on)
73 if (on)
74 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
75 else
76 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
79 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
80 on the power bus which the green led on spitz provides */
81 static void spitz_discharge1(int on)
83 if (on)
84 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
85 else
86 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
89 static void spitz_presuspend(void)
91 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
93 /* GPIO Sleep Register */
94 PGSR0 = 0x00144018;
95 PGSR1 = 0x00EF0000;
96 if (machine_is_akita()) {
97 PGSR2 = 0x2121C000;
98 PGSR3 = 0x00600400;
99 } else {
100 PGSR2 = 0x0121C000;
101 PGSR3 = 0x00600000;
104 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
105 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
106 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
107 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
108 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
110 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
112 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
113 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
114 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
115 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
116 PKSR = 0xffffffff; // clear
118 /* nRESET_OUT Disable */
119 PSLR |= PSLR_SL_ROD;
121 /* Clear reset status */
122 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
124 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
125 PCFR = PCFR_GPR_EN | PCFR_OPDE;
128 static void spitz_postsuspend(void)
130 pxa_gpio_mode(GPIO18_RDY_MD);
131 pxa_gpio_mode(10 | GPIO_IN);
134 static int spitz_should_wakeup(unsigned int resume_on_alarm)
136 int is_resume = 0;
137 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
139 if (spitz_last_ac_status != acin) {
140 if (acin) {
141 /* charge on */
142 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
143 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
144 } else {
145 /* charge off */
146 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
147 sharpsl_pm_led(SHARPSL_LED_OFF);
148 sharpsl_pm.machinfo->charge(0);
149 sharpsl_pm.charge_mode = CHRG_OFF;
151 spitz_last_ac_status = acin;
152 /* Return to suspend as this must be what we were woken for */
153 return 0;
156 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
157 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
159 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
160 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
162 if (resume_on_alarm && (PEDR & PWER_RTC))
163 is_resume |= PWER_RTC;
165 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
166 return is_resume;
169 static unsigned long spitz_charger_wakeup(void)
171 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
174 unsigned long spitzpm_read_devdata(int type)
176 switch(type) {
177 case SHARPSL_STATUS_ACIN:
178 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
179 case SHARPSL_STATUS_LOCK:
180 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
181 case SHARPSL_STATUS_CHRGFULL:
182 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
183 case SHARPSL_STATUS_FATAL:
184 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
185 case SHARPSL_ACIN_VOLT:
186 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
187 case SHARPSL_BATT_TEMP:
188 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
189 case SHARPSL_BATT_VOLT:
190 default:
191 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
195 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
196 .init = spitz_charger_init,
197 .exit = sharpsl_pm_pxa_remove,
198 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
199 .gpio_acin = SPITZ_GPIO_AC_IN,
200 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
201 .batfull_irq = 1,
202 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
203 .discharge = spitz_discharge,
204 .discharge1 = spitz_discharge1,
205 .charge = spitz_charge,
206 .measure_temp = spitz_measure_temp,
207 .presuspend = spitz_presuspend,
208 .postsuspend = spitz_postsuspend,
209 .read_devdata = spitzpm_read_devdata,
210 .charger_wakeup = spitz_charger_wakeup,
211 .should_wakeup = spitz_should_wakeup,
212 .backlight_limit = corgibl_limit_intensity,
213 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
214 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
215 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
216 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
217 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
218 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
219 .bat_levels = 40,
220 .bat_levels_noac = spitz_battery_levels_noac,
221 .bat_levels_acin = spitz_battery_levels_acin,
222 .status_high_acin = 188,
223 .status_low_acin = 178,
224 .status_high_noac = 185,
225 .status_low_noac = 175,
228 static struct platform_device *spitzpm_device;
230 static int __devinit spitzpm_init(void)
232 int ret;
234 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
235 if (!spitzpm_device)
236 return -ENOMEM;
238 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
239 ret = platform_device_add(spitzpm_device);
241 if (ret)
242 platform_device_put(spitzpm_device);
244 return ret;
247 static void spitzpm_exit(void)
249 platform_device_unregister(spitzpm_device);
252 module_init(spitzpm_init);
253 module_exit(spitzpm_exit);