2 * Battery and Power Management code for the Sharp SL-C7xx
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>
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/corgi.h>
28 #include <asm/arch/pxa-regs.h>
29 #include <asm/arch/pxa2xx-regs.h>
30 #include <asm/arch/pxa2xx-gpio.h>
33 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
34 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
35 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
36 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
37 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
38 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
40 static void corgi_charger_init(void)
42 pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
43 pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
44 pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
45 pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
46 sharpsl_pm_pxa_init();
49 static void corgi_measure_temp(int on)
52 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
54 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
57 static void corgi_charge(int on)
60 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
61 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
62 GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
64 GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
65 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
68 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
69 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
73 static void corgi_discharge(int on)
76 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
78 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
81 static void corgi_presuspend(void)
84 unsigned long wakeup_mask;
86 /* charging , so CHARGE_ON bit is HIGH during OFF. */
87 if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
88 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
90 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
92 if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
93 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
95 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
97 if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
98 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
100 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
102 /* Resume on keyboard power key */
103 PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
105 wakeup_mask = GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) | GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_CHRG_FULL);
107 if (!machine_is_corgi())
108 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
110 PWER = wakeup_mask | PWER_RTC;
114 for (i = 0; i <=15; i++) {
115 if (PRER & PFER & GPIO_bit(i)) {
116 if (GPLR0 & GPIO_bit(i) )
117 PRER &= ~GPIO_bit(i);
119 PFER &= ~GPIO_bit(i);
124 static void corgi_postsuspend(void)
129 * Check what brought us out of the suspend.
130 * Return: 0 to sleep, otherwise wake
132 static int corgi_should_wakeup(unsigned int resume_on_alarm)
136 dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
138 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
139 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
141 dev_dbg(sharpsl_pm.dev, "ac insert\n");
142 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
145 dev_dbg(sharpsl_pm.dev, "ac remove\n");
146 sharpsl_pm_led(SHARPSL_LED_OFF);
147 sharpsl_pm.machinfo->charge(0);
148 sharpsl_pm.charge_mode = CHRG_OFF;
152 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
153 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
155 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
156 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
158 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
159 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
161 if (resume_on_alarm && (PEDR & PWER_RTC))
162 is_resume |= PWER_RTC;
164 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
168 static unsigned long corgi_charger_wakeup(void)
170 return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
173 unsigned long corgipm_read_devdata(int type)
176 case SHARPSL_STATUS_ACIN:
177 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_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:
190 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
194 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
195 .init = corgi_charger_init,
196 .exit = sharpsl_pm_pxa_remove,
197 .gpio_batlock = CORGI_GPIO_BAT_COVER,
198 .gpio_acin = CORGI_GPIO_AC_IN,
199 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
200 .discharge = corgi_discharge,
201 .charge = corgi_charge,
202 .measure_temp = corgi_measure_temp,
203 .presuspend = corgi_presuspend,
204 .postsuspend = corgi_postsuspend,
205 .read_devdata = corgipm_read_devdata,
206 .charger_wakeup = corgi_charger_wakeup,
207 .should_wakeup = corgi_should_wakeup,
208 #ifdef CONFIG_BACKLIGHT_CORGI
209 .backlight_limit = corgibl_limit_intensity,
211 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
212 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
213 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
214 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
215 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
216 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
218 .bat_levels_noac = spitz_battery_levels_noac,
219 .bat_levels_acin = spitz_battery_levels_acin,
220 .status_high_acin = 188,
221 .status_low_acin = 178,
222 .status_high_noac = 185,
223 .status_low_noac = 175,
226 static struct platform_device *corgipm_device;
228 static int __devinit corgipm_init(void)
232 if (!machine_is_corgi() && !machine_is_shepherd()
233 && !machine_is_husky())
236 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
240 if (!machine_is_corgi())
241 corgi_pm_machinfo.batfull_irq = 1;
243 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
244 ret = platform_device_add(corgipm_device);
247 platform_device_put(corgipm_device);
252 static void corgipm_exit(void)
254 platform_device_unregister(corgipm_device);
257 module_init(corgipm_init);
258 module_exit(corgipm_exit);