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/gpio.h>
18 #include <linux/gpio-pxa.h>
19 #include <linux/interrupt.h>
20 #include <linux/platform_device.h>
21 #include <linux/apm-emulation.h>
24 #include <asm/mach-types.h>
25 #include <mach/hardware.h>
27 #include <mach/spitz.h>
28 #include <mach/pxa27x.h>
29 #include <mach/sharpsl_pm.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 int spitz_last_ac_status;
42 static struct gpio spitz_charger_gpios[] = {
43 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
44 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
45 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
46 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
47 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
48 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
51 static void spitz_charger_init(void)
53 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
56 static void spitz_measure_temp(int on)
58 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
61 static void spitz_charge(int on)
64 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
65 gpio_set_value(SPITZ_GPIO_JK_B, 1);
66 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
68 gpio_set_value(SPITZ_GPIO_JK_B, 0);
69 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
72 gpio_set_value(SPITZ_GPIO_JK_B, 0);
73 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
77 static void spitz_discharge(int on)
79 gpio_set_value(SPITZ_GPIO_JK_A, on);
82 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
83 on the power bus which the green led on spitz provides */
84 static void spitz_discharge1(int on)
86 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
89 static unsigned long gpio18_config[] = {
94 static void spitz_presuspend(void)
96 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
98 /* GPIO Sleep Register */
101 if (machine_is_akita()) {
109 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
110 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
111 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
112 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
113 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
115 pxa2xx_mfp_config(&gpio18_config[0], 1);
116 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
119 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
120 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
121 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
122 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
123 PKSR = 0xffffffff; /* clear */
125 /* nRESET_OUT Disable */
128 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
129 PCFR = PCFR_GPR_EN | PCFR_OPDE;
132 static void spitz_postsuspend(void)
134 pxa2xx_mfp_config(&gpio18_config[1], 1);
137 static int spitz_should_wakeup(unsigned int resume_on_alarm)
140 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
142 if (spitz_last_ac_status != acin) {
145 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
146 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
149 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
150 sharpsl_pm_led(SHARPSL_LED_OFF);
151 sharpsl_pm.machinfo->charge(0);
152 sharpsl_pm.charge_mode = CHRG_OFF;
154 spitz_last_ac_status = acin;
155 /* Return to suspend as this must be what we were woken for */
159 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
160 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
162 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
163 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
165 if (resume_on_alarm && (PEDR & PWER_RTC))
166 is_resume |= PWER_RTC;
168 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
172 static unsigned long spitz_charger_wakeup(void)
175 ret = ((!gpio_get_value(SPITZ_GPIO_KEY_INT)
176 << GPIO_bit(SPITZ_GPIO_KEY_INT))
177 | gpio_get_value(SPITZ_GPIO_SYNC));
181 unsigned long spitzpm_read_devdata(int type)
184 case SHARPSL_STATUS_ACIN:
185 return !gpio_get_value(SPITZ_GPIO_AC_IN);
186 case SHARPSL_STATUS_LOCK:
187 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
188 case SHARPSL_STATUS_CHRGFULL:
189 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
190 case SHARPSL_STATUS_FATAL:
191 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
192 case SHARPSL_ACIN_VOLT:
193 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
194 case SHARPSL_BATT_TEMP:
195 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
196 case SHARPSL_BATT_VOLT:
198 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
202 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
203 .init = spitz_charger_init,
205 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
206 .gpio_acin = SPITZ_GPIO_AC_IN,
207 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
209 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
210 .discharge = spitz_discharge,
211 .discharge1 = spitz_discharge1,
212 .charge = spitz_charge,
213 .measure_temp = spitz_measure_temp,
214 .presuspend = spitz_presuspend,
215 .postsuspend = spitz_postsuspend,
216 .read_devdata = spitzpm_read_devdata,
217 .charger_wakeup = spitz_charger_wakeup,
218 .should_wakeup = spitz_should_wakeup,
219 #if defined(CONFIG_LCD_CORGI)
220 .backlight_limit = corgi_lcd_limit_intensity,
222 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
223 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
224 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
225 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
226 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
227 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
229 .bat_levels_noac = sharpsl_battery_levels_noac,
230 .bat_levels_acin = sharpsl_battery_levels_acin,
231 .status_high_acin = 188,
232 .status_low_acin = 178,
233 .status_high_noac = 185,
234 .status_low_noac = 175,
237 static struct platform_device *spitzpm_device;
239 static int __devinit spitzpm_init(void)
243 if (!machine_is_spitz() && !machine_is_akita()
244 && !machine_is_borzoi())
247 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
251 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
252 ret = platform_device_add(spitzpm_device);
255 platform_device_put(spitzpm_device);
260 static void spitzpm_exit(void)
262 platform_device_unregister(spitzpm_device);
265 module_init(spitzpm_init);
266 module_exit(spitzpm_exit);