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 void spitz_charger_init(void)
39 {
40 gpio_request(SPITZ_GPIO_KEY_INT, "Keyboard Interrupt");
41 gpio_direction_input(SPITZ_GPIO_KEY_INT);
42 gpio_request(SPITZ_GPIO_SYNC, "Sync");
43 gpio_direction_input(SPITZ_GPIO_SYNC);
44 gpio_request(SPITZ_GPIO_AC_IN, "Charger Detection");
45 gpio_direction_input(SPITZ_GPIO_AC_IN);
46 gpio_request(SPITZ_GPIO_ADC_TEMP_ON, "ADC Temp On");
47 gpio_direction_output(SPITZ_GPIO_ADC_TEMP_ON, 0);
48 gpio_request(SPITZ_GPIO_JK_B, "JK B");
49 gpio_direction_output(SPITZ_GPIO_JK_B, 0);
50 gpio_request(SPITZ_GPIO_CHRG_ON, "Charger On");
51 gpio_direction_output(SPITZ_GPIO_CHRG_ON, 0);
52 }
53
54 static void spitz_measure_temp(int on)
55 {
56 gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
57 }
58
59 static void spitz_charge(int on)
60 {
61 if (on) {
62 if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
63 gpio_set_value(SPITZ_GPIO_JK_B, 1);
64 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
65 } else {
66 gpio_set_value(SPITZ_GPIO_JK_B, 0);
67 gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
68 }
69 } else {
70 gpio_set_value(SPITZ_GPIO_JK_B, 0);
71 gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
72 }
73 }
74
75 static void spitz_discharge(int on)
76 {
77 gpio_set_value(SPITZ_GPIO_JK_A, on);
78 }
79
80 /* HACK - For unknown reasons, accurate voltage readings are only made with a load
81 on the power bus which the green led on spitz provides */
82 static void spitz_discharge1(int on)
83 {
84 gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
85 }
86
87 static unsigned long gpio18_config = GPIO18_GPIO;
88
89 static void spitz_presuspend(void)
90 {
91 spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
92
93 /* GPIO Sleep Register */
94 PGSR0 = 0x00144018;
95 PGSR1 = 0x00EF0000;
96 if (machine_is_akita()) {
97 PGSR2 = 0x2121C000;
98 PGSR3 = 0x00600400;
99 } else {
100 PGSR2 = 0x0121C000;
101 PGSR3 = 0x00600000;
102 }
103
104 PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
105 PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
106 PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
107 PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
108 PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
109
110 pxa2xx_mfp_config(&gpio18_config, 1);
111 gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
112 gpio_free(18);
113
114 PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
115 PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
116 PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
117 PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
118 PKSR = 0xffffffff; /* clear */
119
120 /* nRESET_OUT Disable */
121 PSLR |= PSLR_SL_ROD;
122
123 /* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
124 PCFR = PCFR_GPR_EN | PCFR_OPDE;
125 }
126
127 static void spitz_postsuspend(void)
128 {
129 }
130
131 static int spitz_should_wakeup(unsigned int resume_on_alarm)
132 {
133 int is_resume = 0;
134 int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
135
136 if (spitz_last_ac_status != acin) {
137 if (acin) {
138 /* charge on */
139 sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
140 dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
141 } else {
142 /* charge off */
143 dev_dbg(sharpsl_pm.dev, "AC Removed\n");
144 sharpsl_pm_led(SHARPSL_LED_OFF);
145 sharpsl_pm.machinfo->charge(0);
146 sharpsl_pm.charge_mode = CHRG_OFF;
147 }
148 spitz_last_ac_status = acin;
149 /* Return to suspend as this must be what we were woken for */
150 return 0;
151 }
152
153 if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
154 is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
155
156 if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
157 is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
158
159 if (resume_on_alarm && (PEDR & PWER_RTC))
160 is_resume |= PWER_RTC;
161
162 dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
163 return is_resume;
164 }
165
166 static bool spitz_charger_wakeup(void)
167 {
168 return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
169 gpio_get_value(SPITZ_GPIO_SYNC);
170 }
171
172 static unsigned long spitzpm_read_devdata(int type)
173 {
174 switch (type) {
175 case SHARPSL_STATUS_ACIN:
176 return !gpio_get_value(SPITZ_GPIO_AC_IN);
177 case SHARPSL_STATUS_LOCK:
178 return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
179 case SHARPSL_STATUS_CHRGFULL:
180 return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
181 case SHARPSL_STATUS_FATAL:
182 return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
183 case SHARPSL_ACIN_VOLT:
184 return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
185 case SHARPSL_BATT_TEMP:
186 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
187 case SHARPSL_BATT_VOLT:
188 default:
189 return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
190 }
191 }
192
193 struct sharpsl_charger_machinfo spitz_pm_machinfo = {
194 .init = spitz_charger_init,
195 .exit = NULL,
196 .gpio_batlock = SPITZ_GPIO_BAT_COVER,
197 .gpio_acin = SPITZ_GPIO_AC_IN,
198 .gpio_batfull = SPITZ_GPIO_CHRG_FULL,
199 .batfull_irq = 1,
200 .gpio_fatal = SPITZ_GPIO_FATAL_BAT,
201 .discharge = spitz_discharge,
202 .discharge1 = spitz_discharge1,
203 .charge = spitz_charge,
204 .measure_temp = spitz_measure_temp,
205 .presuspend = spitz_presuspend,
206 .postsuspend = spitz_postsuspend,
207 .read_devdata = spitzpm_read_devdata,
208 .charger_wakeup = spitz_charger_wakeup,
209 .should_wakeup = spitz_should_wakeup,
210 #if defined(CONFIG_LCD_CORGI)
211 .backlight_limit = corgi_lcd_limit_intensity,
212 #endif
213 .charge_on_volt = SHARPSL_CHARGE_ON_VOLT,
214 .charge_on_temp = SHARPSL_CHARGE_ON_TEMP,
215 .charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
216 .charge_acin_low = SHARPSL_CHARGE_ON_ACIN_LOW,
217 .fatal_acin_volt = SHARPSL_FATAL_ACIN_VOLT,
218 .fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
219 .bat_levels = 40,
220 .bat_levels_noac = sharpsl_battery_levels_noac,
221 .bat_levels_acin = sharpsl_battery_levels_acin,
222 .status_high_acin = 188,
223 .status_low_acin = 178,
224 .status_high_noac = 185,
225 .status_low_noac = 175,
226 };
227
228 static struct platform_device *spitzpm_device;
229
230 static int spitzpm_init(void)
231 {
232 int ret;
233
234 if (!machine_is_spitz() && !machine_is_akita()
235 && !machine_is_borzoi())
236 return -ENODEV;
237
238 spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
239 if (!spitzpm_device)
240 return -ENOMEM;
241
242 spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
243 ret = platform_device_add(spitzpm_device);
244
245 if (ret)
246 platform_device_put(spitzpm_device);
247
248 return ret;
249 }
250
251 static void spitzpm_exit(void)
252 {
253 platform_device_unregister(spitzpm_device);
254 }
255
256 module_init(spitzpm_init);
257 module_exit(spitzpm_exit);
258
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