1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Battery and Power Management code for the Sharp SL-C7xx
4 *
5 * Copyright (c) 2005 Richard Purdie
6 */
7
8 #include <linux/module.h>
9 #include <linux/stat.h>
10 #include <linux/init.h>
11 #include <linux/kernel.h>
12 #include <linux/delay.h>
13 #include <linux/gpio.h>
14 #include <linux/gpio-pxa.h>
15 #include <linux/interrupt.h>
16 #include <linux/platform_device.h>
17 #include <linux/apm-emulation.h>
18 #include <linux/io.h>
19
20 #include <asm/irq.h>
21 #include <asm/mach-types.h>
22
23 #include "corgi.h"
24 #include "pxa2xx-regs.h"
25 #include "sharpsl_pm.h"
26
27 #include "generic.h"
28
29 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
30 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
31 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
32 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
33 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
34 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
35
36 static struct gpio charger_gpios[] = {
37 { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
38 { CORGI_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
39 { CORGI_GPIO_CHRG_UKN, GPIOF_OUT_INIT_LOW, "Charger Unknown" },
40 { CORGI_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
41 { CORGI_GPIO_KEY_INT, GPIOF_IN, "Key Interrupt" },
42 { CORGI_GPIO_WAKEUP, GPIOF_IN, "System wakeup notification" },
43 };
44
corgi_charger_init(void)45 static void corgi_charger_init(void)
46 {
47 gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
48 }
49
corgi_measure_temp(int on)50 static void corgi_measure_temp(int on)
51 {
52 gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
53 }
54
corgi_charge(int on)55 static void corgi_charge(int on)
56 {
57 if (on) {
58 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
59 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
60 gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
61 } else {
62 gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
63 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
64 }
65 } else {
66 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
67 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
68 }
69 }
70
corgi_discharge(int on)71 static void corgi_discharge(int on)
72 {
73 gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
74 }
75
corgi_presuspend(void)76 static void corgi_presuspend(void)
77 {
78 }
79
corgi_postsuspend(void)80 static void corgi_postsuspend(void)
81 {
82 }
83
84 /*
85 * Check what brought us out of the suspend.
86 * Return: 0 to sleep, otherwise wake
87 */
corgi_should_wakeup(unsigned int resume_on_alarm)88 static int corgi_should_wakeup(unsigned int resume_on_alarm)
89 {
90 int is_resume = 0;
91
92 dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
93 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
94 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
95 gpio_get_value(CORGI_GPIO_CHRG_FULL),
96 gpio_get_value(CORGI_GPIO_KEY_INT),
97 gpio_get_value(CORGI_GPIO_WAKEUP));
98
99 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
100 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
101 /* charge on */
102 dev_dbg(sharpsl_pm.dev, "ac insert\n");
103 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
104 } else {
105 /* charge off */
106 dev_dbg(sharpsl_pm.dev, "ac remove\n");
107 sharpsl_pm_led(SHARPSL_LED_OFF);
108 sharpsl_pm.machinfo->charge(0);
109 sharpsl_pm.charge_mode = CHRG_OFF;
110 }
111 }
112
113 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
114 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
115
116 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
117 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
118
119 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
120 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
121
122 if (resume_on_alarm && (PEDR & PWER_RTC))
123 is_resume |= PWER_RTC;
124
125 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
126 return is_resume;
127 }
128
corgi_charger_wakeup(void)129 static bool corgi_charger_wakeup(void)
130 {
131 return !gpio_get_value(CORGI_GPIO_AC_IN) ||
132 !gpio_get_value(CORGI_GPIO_KEY_INT) ||
133 !gpio_get_value(CORGI_GPIO_WAKEUP);
134 }
135
corgipm_read_devdata(int type)136 unsigned long corgipm_read_devdata(int type)
137 {
138 switch(type) {
139 case SHARPSL_STATUS_ACIN:
140 return !gpio_get_value(CORGI_GPIO_AC_IN);
141 case SHARPSL_STATUS_LOCK:
142 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
143 case SHARPSL_STATUS_CHRGFULL:
144 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
145 case SHARPSL_STATUS_FATAL:
146 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
147 case SHARPSL_ACIN_VOLT:
148 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
149 case SHARPSL_BATT_TEMP:
150 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
151 case SHARPSL_BATT_VOLT:
152 default:
153 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
154 }
155 }
156
157 static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
158 .init = corgi_charger_init,
159 .exit = NULL,
160 .gpio_batlock = CORGI_GPIO_BAT_COVER,
161 .gpio_acin = CORGI_GPIO_AC_IN,
162 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
163 .discharge = corgi_discharge,
164 .charge = corgi_charge,
165 .measure_temp = corgi_measure_temp,
166 .presuspend = corgi_presuspend,
167 .postsuspend = corgi_postsuspend,
168 .read_devdata = corgipm_read_devdata,
169 .charger_wakeup = corgi_charger_wakeup,
170 .should_wakeup = corgi_should_wakeup,
171 #if defined(CONFIG_LCD_CORGI)
172 .backlight_limit = corgi_lcd_limit_intensity,
173 #endif
174 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
175 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
176 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
177 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
178 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
179 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
180 .bat_levels = 40,
181 .bat_levels_noac = sharpsl_battery_levels_noac,
182 .bat_levels_acin = sharpsl_battery_levels_acin,
183 .status_high_acin = 188,
184 .status_low_acin = 178,
185 .status_high_noac = 185,
186 .status_low_noac = 175,
187 };
188
189 static struct platform_device *corgipm_device;
190
corgipm_init(void)191 static int corgipm_init(void)
192 {
193 int ret;
194
195 if (!machine_is_corgi() && !machine_is_shepherd()
196 && !machine_is_husky())
197 return -ENODEV;
198
199 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
200 if (!corgipm_device)
201 return -ENOMEM;
202
203 if (!machine_is_corgi())
204 corgi_pm_machinfo.batfull_irq = 1;
205
206 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
207 ret = platform_device_add(corgipm_device);
208
209 if (ret)
210 platform_device_put(corgipm_device);
211
212 return ret;
213 }
214
corgipm_exit(void)215 static void corgipm_exit(void)
216 {
217 platform_device_unregister(corgipm_device);
218 }
219
220 module_init(corgipm_init);
221 module_exit(corgipm_exit);
222
