1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Battery and Power Management code for the Sharp SL-Cxx00
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
19 #include <asm/irq.h>
20 #include <asm/mach-types.h>
21
22 #include "spitz.h"
23 #include "pxa27x.h"
24 #include "sharpsl_pm.h"
25
26 #include "generic.h"
27
28 #define SHARPSL_CHARGE_ON_VOLT 0x99 /* 2.9V */
29 #define SHARPSL_CHARGE_ON_TEMP 0xe0 /* 2.9V */
30 #define SHARPSL_CHARGE_ON_ACIN_HIGH 0x9b /* 6V */
31 #define SHARPSL_CHARGE_ON_ACIN_LOW 0x34 /* 2V */
32 #define SHARPSL_FATAL_ACIN_VOLT 182 /* 3.45V */
33 #define SHARPSL_FATAL_NOACIN_VOLT 170 /* 3.40V */
34
35 static int spitz_last_ac_status;
36
37 static struct gpio spitz_charger_gpios[] = {
38 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
39 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
40 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
41 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
42 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
43 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
44 };
45
spitz_charger_init(void)46 static void spitz_charger_init(void)
47 {
48 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
49 }
50
spitz_measure_temp(int on)51 static void spitz_measure_temp(int on)
52 {
53 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
54 }
55
spitz_charge(int on)56 static void spitz_charge(int on)
57 {
58 if (on) {
59 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
60 gpio_set_value(SPITZ_GPIO_JK_B, 1);
61 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
62 } else {
63 gpio_set_value(SPITZ_GPIO_JK_B, 0);
64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
65 }
66 } else {
67 gpio_set_value(SPITZ_GPIO_JK_B, 0);
68 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
69 }
70 }
71
spitz_discharge(int on)72 static void spitz_discharge(int on)
73 {
74 gpio_set_value(SPITZ_GPIO_JK_A, on);
75 }
76
77 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
78 on the power bus which the green led on spitz provides */
spitz_discharge1(int on)79 static void spitz_discharge1(int on)
80 {
81 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
82 }
83
84 static unsigned long gpio18_config = GPIO18_GPIO;
85
spitz_presuspend(void)86 static void spitz_presuspend(void)
87 {
88 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
89
90 /* GPIO Sleep Register */
91 PGSR0 = 0x00144018;
92 PGSR1 = 0x00EF0000;
93 if (machine_is_akita()) {
94 PGSR2 = 0x2121C000;
95 PGSR3 = 0x00600400;
96 } else {
97 PGSR2 = 0x0121C000;
98 PGSR3 = 0x00600000;
99 }
100
101 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
102 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
103 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
104 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
105 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
106
107 pxa2xx_mfp_config(&gpio18_config, 1);
108 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
109 gpio_free(18);
110
111 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
112 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
113 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
114 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
115 PKSR = 0xffffffff; /* clear */
116
117 /* nRESET_OUT Disable */
118 PSLR |= PSLR_SL_ROD;
119
120 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
121 PCFR = PCFR_GPR_EN | PCFR_OPDE;
122 }
123
spitz_postsuspend(void)124 static void spitz_postsuspend(void)
125 {
126 }
127
spitz_should_wakeup(unsigned int resume_on_alarm)128 static int spitz_should_wakeup(unsigned int resume_on_alarm)
129 {
130 int is_resume = 0;
131 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
132
133 if (spitz_last_ac_status != acin) {
134 if (acin) {
135 /* charge on */
136 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
137 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
138 } else {
139 /* charge off */
140 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
141 sharpsl_pm_led(SHARPSL_LED_OFF);
142 sharpsl_pm.machinfo->charge(0);
143 sharpsl_pm.charge_mode = CHRG_OFF;
144 }
145 spitz_last_ac_status = acin;
146 /* Return to suspend as this must be what we were woken for */
147 return 0;
148 }
149
150 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
151 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
152
153 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
154 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
155
156 if (resume_on_alarm && (PEDR & PWER_RTC))
157 is_resume |= PWER_RTC;
158
159 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
160 return is_resume;
161 }
162
spitz_charger_wakeup(void)163 static bool spitz_charger_wakeup(void)
164 {
165 return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
166 gpio_get_value(SPITZ_GPIO_SYNC);
167 }
168
spitzpm_read_devdata(int type)169 unsigned long spitzpm_read_devdata(int type)
170 {
171 switch (type) {
172 case SHARPSL_STATUS_ACIN:
173 return !gpio_get_value(SPITZ_GPIO_AC_IN);
174 case SHARPSL_STATUS_LOCK:
175 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
176 case SHARPSL_STATUS_CHRGFULL:
177 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
178 case SHARPSL_STATUS_FATAL:
179 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
180 case SHARPSL_ACIN_VOLT:
181 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
182 case SHARPSL_BATT_TEMP:
183 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
184 case SHARPSL_BATT_VOLT:
185 default:
186 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
187 }
188 }
189
190 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
191 .init = spitz_charger_init,
192 .exit = NULL,
193 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
194 .gpio_acin = SPITZ_GPIO_AC_IN,
195 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
196 .batfull_irq = 1,
197 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
198 .discharge = spitz_discharge,
199 .discharge1 = spitz_discharge1,
200 .charge = spitz_charge,
201 .measure_temp = spitz_measure_temp,
202 .presuspend = spitz_presuspend,
203 .postsuspend = spitz_postsuspend,
204 .read_devdata = spitzpm_read_devdata,
205 .charger_wakeup = spitz_charger_wakeup,
206 .should_wakeup = spitz_should_wakeup,
207 #if defined(CONFIG_LCD_CORGI)
208 .backlight_limit = corgi_lcd_limit_intensity,
209 #endif
210 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
211 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
212 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
213 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
214 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
215 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
216 .bat_levels = 40,
217 .bat_levels_noac = sharpsl_battery_levels_noac,
218 .bat_levels_acin = sharpsl_battery_levels_acin,
219 .status_high_acin = 188,
220 .status_low_acin = 178,
221 .status_high_noac = 185,
222 .status_low_noac = 175,
223 };
224
225 static struct platform_device *spitzpm_device;
226
spitzpm_init(void)227 static int spitzpm_init(void)
228 {
229 int ret;
230
231 if (!machine_is_spitz() && !machine_is_akita()
232 && !machine_is_borzoi())
233 return -ENODEV;
234
235 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
236 if (!spitzpm_device)
237 return -ENOMEM;
238
239 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
240 ret = platform_device_add(spitzpm_device);
241
242 if (ret)
243 platform_device_put(spitzpm_device);
244
245 return ret;
246 }
247
spitzpm_exit(void)248 static void spitzpm_exit(void)
249 {
250 platform_device_unregister(spitzpm_device);
251 }
252
253 module_init(spitzpm_init);
254 module_exit(spitzpm_exit);
255