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>
22 #include <asm/mach-types.h>
23 #include <mach/hardware.h>
25 #include <mach/sharpsl.h>
26 #include <mach/spitz.h>
27 #include <mach/pxa27x.h>
32 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
33 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
34 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
35 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
36 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
37 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
39 static int spitz_last_ac_status;
41 static struct gpio spitz_charger_gpios[] = {
42 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
43 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
44 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
45 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
46 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
49 static void spitz_charger_init(void)
51 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
54 static void spitz_measure_temp(int on)
56 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
59 static void spitz_charge(int on)
62 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
63 gpio_set_value(SPITZ_GPIO_JK_B, 1);
64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
66 gpio_set_value(SPITZ_GPIO_JK_B, 0);
67 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
70 gpio_set_value(SPITZ_GPIO_JK_B, 0);
71 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
75 static void spitz_discharge(int on)
77 gpio_set_value(SPITZ_GPIO_JK_A, on);
80 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
81 on the power bus which the green led on spitz provides */
82 static void spitz_discharge1(int on)
84 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
87 static unsigned long gpio18_config[] = {
92 static void spitz_presuspend(void)
94 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
96 /* GPIO Sleep Register */
99 if (machine_is_akita()) {
107 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
108 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
109 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
110 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
111 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
113 pxa2xx_mfp_config(&gpio18_config[0], 1);
114 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
117 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
118 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
119 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
120 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
121 PKSR = 0xffffffff; /* clear */
123 /* nRESET_OUT Disable */
126 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
127 PCFR = PCFR_GPR_EN | PCFR_OPDE;
130 static void spitz_postsuspend(void)
132 pxa2xx_mfp_config(&gpio18_config[1], 1);
135 static int spitz_should_wakeup(unsigned int resume_on_alarm)
138 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
140 if (spitz_last_ac_status != acin) {
143 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
144 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
147 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
148 sharpsl_pm_led(SHARPSL_LED_OFF);
149 sharpsl_pm.machinfo->charge(0);
150 sharpsl_pm.charge_mode = CHRG_OFF;
152 spitz_last_ac_status = acin;
153 /* Return to suspend as this must be what we were woken for */
157 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
158 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
160 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
161 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
163 if (resume_on_alarm && (PEDR & PWER_RTC))
164 is_resume |= PWER_RTC;
166 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
170 static unsigned long spitz_charger_wakeup(void)
172 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
175 unsigned long spitzpm_read_devdata(int type)
178 case SHARPSL_STATUS_ACIN:
179 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
180 case SHARPSL_STATUS_LOCK:
181 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
182 case SHARPSL_STATUS_CHRGFULL:
183 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
184 case SHARPSL_STATUS_FATAL:
185 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
186 case SHARPSL_ACIN_VOLT:
187 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
188 case SHARPSL_BATT_TEMP:
189 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
190 case SHARPSL_BATT_VOLT:
192 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
196 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
197 .init = spitz_charger_init,
199 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
200 .gpio_acin = SPITZ_GPIO_AC_IN,
201 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
203 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
204 .discharge = spitz_discharge,
205 .discharge1 = spitz_discharge1,
206 .charge = spitz_charge,
207 .measure_temp = spitz_measure_temp,
208 .presuspend = spitz_presuspend,
209 .postsuspend = spitz_postsuspend,
210 .read_devdata = spitzpm_read_devdata,
211 .charger_wakeup = spitz_charger_wakeup,
212 .should_wakeup = spitz_should_wakeup,
213 #if defined(CONFIG_LCD_CORGI)
214 .backlight_limit = corgi_lcd_limit_intensity,
215 #elif defined(CONFIG_BACKLIGHT_CORGI)
216 .backlight_limit = corgibl_limit_intensity,
218 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
219 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
220 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
221 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
222 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
223 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
225 .bat_levels_noac = sharpsl_battery_levels_noac,
226 .bat_levels_acin = sharpsl_battery_levels_acin,
227 .status_high_acin = 188,
228 .status_low_acin = 178,
229 .status_high_noac = 185,
230 .status_low_noac = 175,
233 static struct platform_device *spitzpm_device;
235 static int __devinit spitzpm_init(void)
239 if (!machine_is_spitz() && !machine_is_akita()
240 && !machine_is_borzoi())
243 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
247 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
248 ret = platform_device_add(spitzpm_device);
251 platform_device_put(spitzpm_device);
256 static void spitzpm_exit(void)
258 platform_device_unregister(spitzpm_device);
261 module_init(spitzpm_init);
262 module_exit(spitzpm_exit);