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#include <mach/hardware.h>
22
23#include <mach/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
36static int spitz_last_ac_status;
37
38static 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
47static void spitz_charger_init(void)
48{
49	gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
50}
51
52static void spitz_measure_temp(int on)
53{
54	gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
55}
56
57static 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
73static 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 */
80static void spitz_discharge1(int on)
81{
82	gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
83}
84
85static unsigned long gpio18_config = GPIO18_GPIO;
86
87static 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
125static void spitz_postsuspend(void)
126{
127}
128
129static 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
164static bool spitz_charger_wakeup(void)
165{
166	return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
167		gpio_get_value(SPITZ_GPIO_SYNC);
168}
169
170unsigned 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
191struct 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
226static struct platform_device *spitzpm_device;
227
228static 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
249static void spitzpm_exit(void)
250{
251	platform_device_unregister(spitzpm_device);
252}
253
254module_init(spitzpm_init);
255module_exit(spitzpm_exit);
256