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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
36static 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
45static void corgi_charger_init(void)
46{
47 gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
48}
49
50static void corgi_measure_temp(int on)
51{
52 gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
53}
54
55static 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
71static void corgi_discharge(int on)
72{
73 gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
74}
75
76static void corgi_presuspend(void)
77{
78}
79
80static 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 */
88static 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
129static 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
136unsigned 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
157static 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
189static struct platform_device *corgipm_device;
190
191static 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
215static void corgipm_exit(void)
216{
217 platform_device_unregister(corgipm_device);
218}
219
220module_init(corgipm_init);
221module_exit(corgipm_exit);
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/gpio.h>
18#include <linux/gpio-pxa.h>
19#include <linux/interrupt.h>
20#include <linux/platform_device.h>
21#include <linux/apm-emulation.h>
22#include <linux/io.h>
23
24#include <asm/irq.h>
25#include <asm/mach-types.h>
26#include <mach/hardware.h>
27
28#include <mach/corgi.h>
29#include <mach/pxa2xx-regs.h>
30#include "sharpsl_pm.h"
31
32#include "generic.h"
33
34#define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
35#define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
36#define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
37#define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
38#define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
39#define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
40
41static struct gpio charger_gpios[] = {
42 { CORGI_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
43 { CORGI_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
44 { CORGI_GPIO_CHRG_UKN, GPIOF_OUT_INIT_LOW, "Charger Unknown" },
45 { CORGI_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
46 { CORGI_GPIO_KEY_INT, GPIOF_IN, "Key Interrupt" },
47 { CORGI_GPIO_WAKEUP, GPIOF_IN, "System wakeup notification" },
48};
49
50static void corgi_charger_init(void)
51{
52 gpio_request_array(ARRAY_AND_SIZE(charger_gpios));
53}
54
55static void corgi_measure_temp(int on)
56{
57 gpio_set_value(CORGI_GPIO_ADC_TEMP_ON, on);
58}
59
60static void corgi_charge(int on)
61{
62 if (on) {
63 if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
64 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
65 gpio_set_value(CORGI_GPIO_CHRG_UKN, 1);
66 } else {
67 gpio_set_value(CORGI_GPIO_CHRG_ON, 1);
68 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
69 }
70 } else {
71 gpio_set_value(CORGI_GPIO_CHRG_ON, 0);
72 gpio_set_value(CORGI_GPIO_CHRG_UKN, 0);
73 }
74}
75
76static void corgi_discharge(int on)
77{
78 gpio_set_value(CORGI_GPIO_DISCHARGE_ON, on);
79}
80
81static void corgi_presuspend(void)
82{
83}
84
85static void corgi_postsuspend(void)
86{
87}
88
89/*
90 * Check what brought us out of the suspend.
91 * Return: 0 to sleep, otherwise wake
92 */
93static int corgi_should_wakeup(unsigned int resume_on_alarm)
94{
95 int is_resume = 0;
96
97 dev_dbg(sharpsl_pm.dev, "PEDR = %x, GPIO_AC_IN = %d, "
98 "GPIO_CHRG_FULL = %d, GPIO_KEY_INT = %d, GPIO_WAKEUP = %d\n",
99 PEDR, gpio_get_value(CORGI_GPIO_AC_IN),
100 gpio_get_value(CORGI_GPIO_CHRG_FULL),
101 gpio_get_value(CORGI_GPIO_KEY_INT),
102 gpio_get_value(CORGI_GPIO_WAKEUP));
103
104 if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
105 if (sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN)) {
106 /* charge on */
107 dev_dbg(sharpsl_pm.dev, "ac insert\n");
108 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
109 } else {
110 /* charge off */
111 dev_dbg(sharpsl_pm.dev, "ac remove\n");
112 sharpsl_pm_led(SHARPSL_LED_OFF);
113 sharpsl_pm.machinfo->charge(0);
114 sharpsl_pm.charge_mode = CHRG_OFF;
115 }
116 }
117
118 if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
119 dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
120
121 if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
122 is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
123
124 if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
125 is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
126
127 if (resume_on_alarm && (PEDR & PWER_RTC))
128 is_resume |= PWER_RTC;
129
130 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n",is_resume);
131 return is_resume;
132}
133
134static unsigned long corgi_charger_wakeup(void)
135{
136 unsigned long ret;
137
138 ret = (!gpio_get_value(CORGI_GPIO_AC_IN) << GPIO_bit(CORGI_GPIO_AC_IN))
139 | (!gpio_get_value(CORGI_GPIO_KEY_INT)
140 << GPIO_bit(CORGI_GPIO_KEY_INT))
141 | (!gpio_get_value(CORGI_GPIO_WAKEUP)
142 << GPIO_bit(CORGI_GPIO_WAKEUP));
143 return ret;
144}
145
146unsigned long corgipm_read_devdata(int type)
147{
148 switch(type) {
149 case SHARPSL_STATUS_ACIN:
150 return !gpio_get_value(CORGI_GPIO_AC_IN);
151 case SHARPSL_STATUS_LOCK:
152 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
153 case SHARPSL_STATUS_CHRGFULL:
154 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
155 case SHARPSL_STATUS_FATAL:
156 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
157 case SHARPSL_ACIN_VOLT:
158 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
159 case SHARPSL_BATT_TEMP:
160 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
161 case SHARPSL_BATT_VOLT:
162 default:
163 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
164 }
165}
166
167static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
168 .init = corgi_charger_init,
169 .exit = NULL,
170 .gpio_batlock = CORGI_GPIO_BAT_COVER,
171 .gpio_acin = CORGI_GPIO_AC_IN,
172 .gpio_batfull = CORGI_GPIO_CHRG_FULL,
173 .discharge = corgi_discharge,
174 .charge = corgi_charge,
175 .measure_temp = corgi_measure_temp,
176 .presuspend = corgi_presuspend,
177 .postsuspend = corgi_postsuspend,
178 .read_devdata = corgipm_read_devdata,
179 .charger_wakeup = corgi_charger_wakeup,
180 .should_wakeup = corgi_should_wakeup,
181#if defined(CONFIG_LCD_CORGI)
182 .backlight_limit = corgi_lcd_limit_intensity,
183#endif
184 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
185 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
186 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
187 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
188 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
189 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
190 .bat_levels = 40,
191 .bat_levels_noac = sharpsl_battery_levels_noac,
192 .bat_levels_acin = sharpsl_battery_levels_acin,
193 .status_high_acin = 188,
194 .status_low_acin = 178,
195 .status_high_noac = 185,
196 .status_low_noac = 175,
197};
198
199static struct platform_device *corgipm_device;
200
201static int corgipm_init(void)
202{
203 int ret;
204
205 if (!machine_is_corgi() && !machine_is_shepherd()
206 && !machine_is_husky())
207 return -ENODEV;
208
209 corgipm_device = platform_device_alloc("sharpsl-pm", -1);
210 if (!corgipm_device)
211 return -ENOMEM;
212
213 if (!machine_is_corgi())
214 corgi_pm_machinfo.batfull_irq = 1;
215
216 corgipm_device->dev.platform_data = &corgi_pm_machinfo;
217 ret = platform_device_add(corgipm_device);
218
219 if (ret)
220 platform_device_put(corgipm_device);
221
222 return ret;
223}
224
225static void corgipm_exit(void)
226{
227 platform_device_unregister(corgipm_device);
228}
229
230module_init(corgipm_init);
231module_exit(corgipm_exit);