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>
21 #include <asm/mach-types.h>
22 #include <asm/hardware.h>
23 #include <asm/hardware/scoop.h>
24 #include <asm/hardware/sharpsl_pm.h>
26 #include <asm/arch/sharpsl.h>
27 #include <asm/arch/spitz.h>
28 #include <asm/arch/pxa-regs.h>
31 static int spitz_last_ac_status;
33 static void spitz_charger_init(void)
35 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
36 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
37 sharpsl_pm_pxa_init();
40 static void spitz_measure_temp(int on)
43 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
45 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_ADC_TEMP_ON);
48 static void spitz_charge(int 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);
55 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
56 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
59 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_B);
60 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_CHRG_ON);
64 static void spitz_discharge(int on)
67 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
69 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_JK_A);
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)
77 set_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
79 reset_scoop_gpio(&spitzscoop_device.dev, SPITZ_SCP_LED_GREEN);
82 static void spitz_presuspend(void)
84 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
86 /* GPIO Sleep Register */
89 if (machine_is_akita()) {
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);
103 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
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
111 /* nRESET_OUT Disable */
114 /* Clear reset status */
115 RCSR = RCSR_HWR | RCSR_WDR | RCSR_SMR | RCSR_GPR;
117 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
118 PCFR = PCFR_GPR_EN | PCFR_OPDE;
121 static void spitz_postsuspend(void)
123 pxa_gpio_mode(GPIO18_RDY_MD);
124 pxa_gpio_mode(10 | GPIO_IN);
127 static int spitz_should_wakeup(unsigned int resume_on_alarm)
130 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
132 if (spitz_last_ac_status != acin) {
135 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
136 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
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;
144 spitz_last_ac_status = acin;
145 /* Return to suspend as this must be what we were woken for */
149 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
150 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
152 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
153 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
155 if (resume_on_alarm && (PEDR & PWER_RTC))
156 is_resume |= PWER_RTC;
158 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
162 static unsigned long spitz_charger_wakeup(void)
164 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
167 unsigned long spitzpm_read_devdata(int 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:
184 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
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,
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,
213 static struct platform_device *spitzpm_device;
215 static int __devinit spitzpm_init(void)
219 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
223 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
224 ret = platform_device_add(spitzpm_device);
227 platform_device_put(spitzpm_device);
232 static void spitzpm_exit(void)
234 platform_device_unregister(spitzpm_device);
237 module_init(spitzpm_init);
238 module_exit(spitzpm_exit);