1 /*
2 * Battery and Power Management code for the Sharp SL-Cxx00
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 <mach/hardware.h>
24
25 #include <mach/sharpsl.h>
26 #include <mach/spitz.h>
27 #include <mach/pxa2xx-regs.h>
28 #include <mach/pxa2xx-gpio.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 int spitz_last_ac_status;
39
40 static void spitz_charger_init(void)
41 {
42 pxa_gpio_mode(SPITZ_GPIO_KEY_INT | GPIO_IN);
43 pxa_gpio_mode(SPITZ_GPIO_SYNC | GPIO_IN);
44 }
45
46 static void spitz_measure_temp(int on)
47 {
48 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
49 }
50
51 static void spitz_charge(int on)
52 {
53 if (on) {
54 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
55 gpio_set_value(SPITZ_GPIO_JK_B, 1);
56 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
57 } else {
58 gpio_set_value(SPITZ_GPIO_JK_B, 0);
59 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
60 }
61 } else {
62 gpio_set_value(SPITZ_GPIO_JK_B, 0);
63 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
64 }
65 }
66
67 static void spitz_discharge(int on)
68 {
69 gpio_set_value(SPITZ_GPIO_JK_A, on);
70 }
71
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)
75 {
76 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
77 }
78
79 static void spitz_presuspend(void)
80 {
81 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
82
83 /* GPIO Sleep Register */
84 PGSR0 = 0x00144018;
85 PGSR1 = 0x00EF0000;
86 if (machine_is_akita()) {
87 PGSR2 = 0x2121C000;
88 PGSR3 = 0x00600400;
89 } else {
90 PGSR2 = 0x0121C000;
91 PGSR3 = 0x00600000;
92 }
93
94 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
95 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
96 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
97 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
98 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
99
100 pxa_gpio_mode(GPIO18_RDY|GPIO_OUT | GPIO_DFLT_HIGH);
101
102 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
103 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
104 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
105 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
106 PKSR = 0xffffffff; // clear
107
108 /* nRESET_OUT Disable */
109 PSLR |= PSLR_SL_ROD;
110
111 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
112 PCFR = PCFR_GPR_EN | PCFR_OPDE;
113 }
114
115 static void spitz_postsuspend(void)
116 {
117 pxa_gpio_mode(GPIO18_RDY_MD);
118 pxa_gpio_mode(10 | GPIO_IN);
119 }
120
121 static int spitz_should_wakeup(unsigned int resume_on_alarm)
122 {
123 int is_resume = 0;
124 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
125
126 if (spitz_last_ac_status != acin) {
127 if (acin) {
128 /* charge on */
129 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
130 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
131 } else {
132 /* charge off */
133 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
134 sharpsl_pm_led(SHARPSL_LED_OFF);
135 sharpsl_pm.machinfo->charge(0);
136 sharpsl_pm.charge_mode = CHRG_OFF;
137 }
138 spitz_last_ac_status = acin;
139 /* Return to suspend as this must be what we were woken for */
140 return 0;
141 }
142
143 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
144 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
145
146 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
147 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
148
149 if (resume_on_alarm && (PEDR & PWER_RTC))
150 is_resume |= PWER_RTC;
151
152 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
153 return is_resume;
154 }
155
156 static unsigned long spitz_charger_wakeup(void)
157 {
158 return (~GPLR0 & GPIO_bit(SPITZ_GPIO_KEY_INT)) | (GPLR0 & GPIO_bit(SPITZ_GPIO_SYNC));
159 }
160
161 unsigned long spitzpm_read_devdata(int type)
162 {
163 switch(type) {
164 case SHARPSL_STATUS_ACIN:
165 return (((~GPLR(SPITZ_GPIO_AC_IN)) & GPIO_bit(SPITZ_GPIO_AC_IN)) != 0);
166 case SHARPSL_STATUS_LOCK:
167 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batlock);
168 case SHARPSL_STATUS_CHRGFULL:
169 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_batfull);
170 case SHARPSL_STATUS_FATAL:
171 return READ_GPIO_BIT(sharpsl_pm.machinfo->gpio_fatal);
172 case SHARPSL_ACIN_VOLT:
173 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
174 case SHARPSL_BATT_TEMP:
175 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
176 case SHARPSL_BATT_VOLT:
177 default:
178 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
179 }
180 }
181
182 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
183 .init = spitz_charger_init,
184 .exit = NULL,
185 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
186 .gpio_acin = SPITZ_GPIO_AC_IN,
187 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
188 .batfull_irq = 1,
189 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
190 .discharge = spitz_discharge,
191 .discharge1 = spitz_discharge1,
192 .charge = spitz_charge,
193 .measure_temp = spitz_measure_temp,
194 .presuspend = spitz_presuspend,
195 .postsuspend = spitz_postsuspend,
196 .read_devdata = spitzpm_read_devdata,
197 .charger_wakeup = spitz_charger_wakeup,
198 .should_wakeup = spitz_should_wakeup,
199 #if defined(CONFIG_LCD_CORGI)
200 .backlight_limit = corgi_lcd_limit_intensity,
201 #elif defined(CONFIG_BACKLIGHT_CORGI)
202 .backlight_limit = corgibl_limit_intensity,
203 #endif
204 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
205 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
206 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
207 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
208 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
209 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
210 .bat_levels = 40,
211 .bat_levels_noac = spitz_battery_levels_noac,
212 .bat_levels_acin = spitz_battery_levels_acin,
213 .status_high_acin = 188,
214 .status_low_acin = 178,
215 .status_high_noac = 185,
216 .status_low_noac = 175,
217 };
218
219 static struct platform_device *spitzpm_device;
220
221 static int __devinit spitzpm_init(void)
222 {
223 int ret;
224
225 if (!machine_is_spitz() && !machine_is_akita()
226 && !machine_is_borzoi())
227 return -ENODEV;
228
229 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
230 if (!spitzpm_device)
231 return -ENOMEM;
232
233 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
234 ret = platform_device_add(spitzpm_device);
235
236 if (ret)
237 platform_device_put(spitzpm_device);
238
239 return ret;
240 }
241
242 static void spitzpm_exit(void)
243 {
244 platform_device_unregister(spitzpm_device);
245 }
246
247 module_init(spitzpm_init);
248 module_exit(spitzpm_exit);
249
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