1 /*
2 * Battery and Power Management code for the Sharp SL-C7xx
3 *
4 * Copyright (c) 2005 Richard Purdie
5 *
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.
9 *
10 */
11
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>
20
21 #include <asm/irq.h>
22 #include <asm/mach-types.h>
23 #include <asm/hardware.h>
24 #include <asm/hardware/scoop.h>
25
26 #include <asm/arch/sharpsl.h>
27 #include <asm/arch/corgi.h>
28 #include <asm/arch/pxa-regs.h>
29 #include "sharpsl.h"
30
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 */
37
38 static void corgi_charger_init(void)
39 {
40 pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
41 pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
42 pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
43 pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
44 sharpsl_pm_pxa_init();
45 }
46
47 static void corgi_measure_temp(int on)
48 {
49 if (on)
50 GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
51 else
52 GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
53 }
54
55 static void corgi_charge(int on)
56 {
57 if (on) {
58 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
59 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
60 GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
61 } else {
62 GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
63 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
64 }
65 } else {
66 GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
67 GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
68 }
69 }
70
71 static void corgi_discharge(int on)
72 {
73 if (on)
74 GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
75 else
76 GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
77 }
78
79 static void corgi_presuspend(void)
80 {
81 int i;
82 unsigned long wakeup_mask;
83
84 /* charging , so CHARGE_ON bit is HIGH during OFF. */
85 if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
86 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
87 else
88 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
89
90 if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
91 PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
92 else
93 PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
94
95 if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
96 PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
97 else
98 PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
99
100 /* Resume on keyboard power key */
101 PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
102
103 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);
104
105 if (!machine_is_corgi())
106 wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
107
108 PWER = wakeup_mask | PWER_RTC;
109 PRER = wakeup_mask;
110 PFER = wakeup_mask;
111
112 for (i = 0; i <=15; i++) {
113 if (PRER & PFER & GPIO_bit(i)) {
114 if (GPLR0 & GPIO_bit(i) )
115 PRER &= ~GPIO_bit(i);
116 else
117 PFER &= ~GPIO_bit(i);
118 }
119 }
120 }
121
122 static void corgi_postsuspend(void)
123 {
124 }
125
126 /*
127 * Check what brought us out of the suspend.
128 * Return: 0 to sleep, otherwise wake
129 */
130 static int corgi_should_wakeup(unsigned int resume_on_alarm)
131 {
132 int is_resume = 0;
133
134 dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
135
136 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
137 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
138 /* charge on */
139 dev_dbg(sharpsl_pm.dev, "ac insert\n");
140 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
141 } else {
142 /* charge off */
143 dev_dbg(sharpsl_pm.dev, "ac remove\n");
144 sharpsl_pm_led(SHARPSL_LED_OFF);
145 sharpsl_pm.machinfo->charge(0);
146 sharpsl_pm.charge_mode = CHRG_OFF;
147 }
148 }
149
150 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
151 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
152
153 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
154 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
155
156 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
157 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
158
159 if (resume_on_alarm && (PEDR & PWER_RTC))
160 is_resume |= PWER_RTC;
161
162 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
163 return is_resume;
164 }
165
166 static unsigned long corgi_charger_wakeup(void)
167 {
168 return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
169 }
170
171 unsigned long corgipm_read_devdata(int type)
172 {
173 switch(type) {
174 case SHARPSL_STATUS_ACIN:
175 return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
176 case SHARPSL_STATUS_LOCK:
177 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
178 case SHARPSL_STATUS_CHRGFULL:
179 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
180 case SHARPSL_STATUS_FATAL:
181 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
182 case SHARPSL_ACIN_VOLT:
183 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
184 case SHARPSL_BATT_TEMP:
185 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
186 case SHARPSL_BATT_VOLT:
187 default:
188 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
189 }
190 }
191
192 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
193 .init = corgi_charger_init,
194 .exit = sharpsl_pm_pxa_remove,
195 .gpio_batlock = CORGI_GPIO_BAT_COVER,
196 .gpio_acin = CORGI_GPIO_AC_IN,
197 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
198 .discharge = corgi_discharge,
199 .charge = corgi_charge,
200 .measure_temp = corgi_measure_temp,
201 .presuspend = corgi_presuspend,
202 .postsuspend = corgi_postsuspend,
203 .read_devdata = corgipm_read_devdata,
204 .charger_wakeup = corgi_charger_wakeup,
205 .should_wakeup = corgi_should_wakeup,
206 .backlight_limit = corgibl_limit_intensity,
207 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
208 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
209 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
210 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
211 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
212 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
213 .bat_levels = 40,
214 .bat_levels_noac = spitz_battery_levels_noac,
215 .bat_levels_acin = spitz_battery_levels_acin,
216 .status_high_acin = 188,
217 .status_low_acin = 178,
218 .status_high_noac = 185,
219 .status_low_noac = 175,
220 };
221
222 static struct platform_device *corgipm_device;
223
224 static int __devinit corgipm_init(void)
225 {
226 int ret;
227
228 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
229 if (!corgipm_device)
230 return -ENOMEM;
231
232 if (!machine_is_corgi())
233 corgi_pm_machinfo.batfull_irq = 1;
234
235 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
236 ret = platform_device_add(corgipm_device);
237
238 if (ret)
239 platform_device_put(corgipm_device);
240
241 return ret;
242 }
243
244 static void corgipm_exit(void)
245 {
246 platform_device_unregister(corgipm_device);
247 }
248
249 module_init(corgipm_init);
250 module_exit(corgipm_exit);
251
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