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 #include <linux/spi/corgi_lcd.h>
19
20 #include <asm/irq.h>
21 #include <asm/mach-types.h>
22
23 #include "spitz.h"
24 #include "pxa27x.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 int spitz_last_ac_status;
37
38 static struct gpio spitz_charger_gpios[] = {
39 { SPITZ_GPIO_KEY_INT, GPIOF_IN, "Keyboard Interrupt" },
40 { SPITZ_GPIO_SYNC, GPIOF_IN, "Sync" },
41 { SPITZ_GPIO_AC_IN, GPIOF_IN, "Charger Detection" },
42 { SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
43 { SPITZ_GPIO_JK_B, GPIOF_OUT_INIT_LOW, "JK B" },
44 { SPITZ_GPIO_CHRG_ON, GPIOF_OUT_INIT_LOW, "Charger On" },
45 };
46
spitz_charger_init(void)47 static void spitz_charger_init(void)
48 {
49 gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
50 }
51
spitz_measure_temp(int on)52 static void spitz_measure_temp(int on)
53 {
54 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
55 }
56
spitz_charge(int on)57 static void spitz_charge(int on)
58 {
59 if (on) {
60 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
61 gpio_set_value(SPITZ_GPIO_JK_B, 1);
62 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
63 } else {
64 gpio_set_value(SPITZ_GPIO_JK_B, 0);
65 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
66 }
67 } else {
68 gpio_set_value(SPITZ_GPIO_JK_B, 0);
69 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
70 }
71 }
72
spitz_discharge(int on)73 static void spitz_discharge(int on)
74 {
75 gpio_set_value(SPITZ_GPIO_JK_A, on);
76 }
77
78 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
79 on the power bus which the green led on spitz provides */
spitz_discharge1(int on)80 static void spitz_discharge1(int on)
81 {
82 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
83 }
84
85 static unsigned long gpio18_config = GPIO18_GPIO;
86
spitz_presuspend(void)87 static void spitz_presuspend(void)
88 {
89 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
90
91 /* GPIO Sleep Register */
92 PGSR0 = 0x00144018;
93 PGSR1 = 0x00EF0000;
94 if (machine_is_akita()) {
95 PGSR2 = 0x2121C000;
96 PGSR3 = 0x00600400;
97 } else {
98 PGSR2 = 0x0121C000;
99 PGSR3 = 0x00600000;
100 }
101
102 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
103 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
104 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
105 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
106 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
107
108 pxa2xx_mfp_config(&gpio18_config, 1);
109 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
110 gpio_free(18);
111
112 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
113 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
114 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
115 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
116 PKSR = 0xffffffff; /* clear */
117
118 /* nRESET_OUT Disable */
119 PSLR |= PSLR_SL_ROD;
120
121 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
122 PCFR = PCFR_GPR_EN | PCFR_OPDE;
123 }
124
spitz_postsuspend(void)125 static void spitz_postsuspend(void)
126 {
127 }
128
spitz_should_wakeup(unsigned int resume_on_alarm)129 static int spitz_should_wakeup(unsigned int resume_on_alarm)
130 {
131 int is_resume = 0;
132 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
133
134 if (spitz_last_ac_status != acin) {
135 if (acin) {
136 /* charge on */
137 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
138 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
139 } else {
140 /* charge off */
141 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
142 sharpsl_pm_led(SHARPSL_LED_OFF);
143 sharpsl_pm.machinfo->charge(0);
144 sharpsl_pm.charge_mode = CHRG_OFF;
145 }
146 spitz_last_ac_status = acin;
147 /* Return to suspend as this must be what we were woken for */
148 return 0;
149 }
150
151 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
152 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
153
154 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
155 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
156
157 if (resume_on_alarm && (PEDR & PWER_RTC))
158 is_resume |= PWER_RTC;
159
160 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
161 return is_resume;
162 }
163
spitz_charger_wakeup(void)164 static bool spitz_charger_wakeup(void)
165 {
166 return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
167 gpio_get_value(SPITZ_GPIO_SYNC);
168 }
169
spitzpm_read_devdata(int type)170 static unsigned long spitzpm_read_devdata(int type)
171 {
172 switch (type) {
173 case SHARPSL_STATUS_ACIN:
174 return !gpio_get_value(SPITZ_GPIO_AC_IN);
175 case SHARPSL_STATUS_LOCK:
176 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
177 case SHARPSL_STATUS_CHRGFULL:
178 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
179 case SHARPSL_STATUS_FATAL:
180 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
181 case SHARPSL_ACIN_VOLT:
182 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
183 case SHARPSL_BATT_TEMP:
184 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
185 case SHARPSL_BATT_VOLT:
186 default:
187 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
188 }
189 }
190
191 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
192 .init = spitz_charger_init,
193 .exit = NULL,
194 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
195 .gpio_acin = SPITZ_GPIO_AC_IN,
196 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
197 .batfull_irq = 1,
198 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
199 .discharge = spitz_discharge,
200 .discharge1 = spitz_discharge1,
201 .charge = spitz_charge,
202 .measure_temp = spitz_measure_temp,
203 .presuspend = spitz_presuspend,
204 .postsuspend = spitz_postsuspend,
205 .read_devdata = spitzpm_read_devdata,
206 .charger_wakeup = spitz_charger_wakeup,
207 .should_wakeup = spitz_should_wakeup,
208 #if defined(CONFIG_LCD_CORGI)
209 .backlight_limit = corgi_lcd_limit_intensity,
210 #endif
211 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
212 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
213 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
214 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
215 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
216 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
217 .bat_levels = 40,
218 .bat_levels_noac = sharpsl_battery_levels_noac,
219 .bat_levels_acin = sharpsl_battery_levels_acin,
220 .status_high_acin = 188,
221 .status_low_acin = 178,
222 .status_high_noac = 185,
223 .status_low_noac = 175,
224 };
225
226 static struct platform_device *spitzpm_device;
227
spitzpm_init(void)228 static int spitzpm_init(void)
229 {
230 int ret;
231
232 if (!machine_is_spitz() && !machine_is_akita()
233 && !machine_is_borzoi())
234 return -ENODEV;
235
236 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
237 if (!spitzpm_device)
238 return -ENOMEM;
239
240 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
241 ret = platform_device_add(spitzpm_device);
242
243 if (ret)
244 platform_device_put(spitzpm_device);
245
246 return ret;
247 }
248
spitzpm_exit(void)249 static void spitzpm_exit(void)
250 {
251 platform_device_unregister(spitzpm_device);
252 }
253
254 module_init(spitzpm_init);
255 module_exit(spitzpm_exit);
256