1/*
2 * Battery and Power Management code for the Sharp SL-Cxx00
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
23#include <asm/irq.h>
24#include <asm/mach-types.h>
25#include <mach/hardware.h>
26
27#include <mach/spitz.h>
28#include <mach/pxa27x.h>
29#include <mach/sharpsl_pm.h>
30
31#include "generic.h"
32
33#define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
34#define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
35#define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
36#define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
37#define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
38#define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
39
40static int spitz_last_ac_status;
41
42static struct gpio spitz_charger_gpios[] = {
43	{ SPITZ_GPIO_KEY_INT,	GPIOF_IN, "Keyboard Interrupt" },
44	{ SPITZ_GPIO_SYNC,	GPIOF_IN, "Sync" },
45	{ SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
46	{ SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
47	{ SPITZ_GPIO_JK_B,	  GPIOF_OUT_INIT_LOW, "JK B" },
48	{ SPITZ_GPIO_CHRG_ON,	  GPIOF_OUT_INIT_LOW, "Charger On" },
49};
50
51static void spitz_charger_init(void)
52{
53	gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
54}
55
56static void spitz_measure_temp(int on)
57{
58	gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
59}
60
61static void spitz_charge(int on)
62{
63	if (on) {
64		if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
65			gpio_set_value(SPITZ_GPIO_JK_B, 1);
66			gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
67		} else {
68			gpio_set_value(SPITZ_GPIO_JK_B, 0);
69			gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
70		}
71	} else {
72		gpio_set_value(SPITZ_GPIO_JK_B, 0);
73		gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
74	}
75}
76
77static void spitz_discharge(int on)
78{
79	gpio_set_value(SPITZ_GPIO_JK_A, on);
80}
81
82/* HACK - For unknown reasons, accurate voltage readings are only made with a load
83   on the power bus which the green led on spitz provides */
84static void spitz_discharge1(int on)
85{
86	gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
87}
88
89static unsigned long gpio18_config = GPIO18_GPIO;
90
91static void spitz_presuspend(void)
92{
93	spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
94
95	/* GPIO Sleep Register */
96	PGSR0 = 0x00144018;
97	PGSR1 = 0x00EF0000;
98	if (machine_is_akita()) {
99		PGSR2 = 0x2121C000;
100		PGSR3 = 0x00600400;
101	} else {
102		PGSR2 = 0x0121C000;
103		PGSR3 = 0x00600000;
104	}
105
106	PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
107	PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
108	PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
109	PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
110	PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
111
112	pxa2xx_mfp_config(&gpio18_config, 1);
113	gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
114	gpio_free(18);
115
116	PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
117	PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
118	PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
119	PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
120	PKSR = 0xffffffff; /* clear */
121
122	/* nRESET_OUT Disable */
123	PSLR |= PSLR_SL_ROD;
124
125	/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
126	PCFR = PCFR_GPR_EN | PCFR_OPDE;
127}
128
129static void spitz_postsuspend(void)
130{
131}
132
133static int spitz_should_wakeup(unsigned int resume_on_alarm)
134{
135	int is_resume = 0;
136	int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
137
138	if (spitz_last_ac_status != acin) {
139		if (acin) {
140			/* charge on */
141			sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
142			dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
143		} else {
144			/* charge off */
145			dev_dbg(sharpsl_pm.dev, "AC Removed\n");
146			sharpsl_pm_led(SHARPSL_LED_OFF);
147			sharpsl_pm.machinfo->charge(0);
148			sharpsl_pm.charge_mode = CHRG_OFF;
149		}
150		spitz_last_ac_status = acin;
151		/* Return to suspend as this must be what we were woken for */
152		return 0;
153	}
154
155	if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
156		is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
157
158	if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
159		is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
160
161	if (resume_on_alarm && (PEDR & PWER_RTC))
162		is_resume |= PWER_RTC;
163
164	dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
165	return is_resume;
166}
167
168static unsigned long spitz_charger_wakeup(void)
169{
170	unsigned long ret;
171	ret = ((!gpio_get_value(SPITZ_GPIO_KEY_INT)
172		<< GPIO_bit(SPITZ_GPIO_KEY_INT))
173		| gpio_get_value(SPITZ_GPIO_SYNC));
174	return ret;
175}
176
177unsigned long spitzpm_read_devdata(int type)
178{
179	switch (type) {
180	case SHARPSL_STATUS_ACIN:
181		return !gpio_get_value(SPITZ_GPIO_AC_IN);
182	case SHARPSL_STATUS_LOCK:
183		return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
184	case SHARPSL_STATUS_CHRGFULL:
185		return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
186	case SHARPSL_STATUS_FATAL:
187		return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
188	case SHARPSL_ACIN_VOLT:
189		return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
190	case SHARPSL_BATT_TEMP:
191		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
192	case SHARPSL_BATT_VOLT:
193	default:
194		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
195	}
196}
197
198struct sharpsl_charger_machinfo spitz_pm_machinfo = {
199	.init             = spitz_charger_init,
200	.exit             = NULL,
201	.gpio_batlock     = SPITZ_GPIO_BAT_COVER,
202	.gpio_acin        = SPITZ_GPIO_AC_IN,
203	.gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
204	.batfull_irq	  = 1,
205	.gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
206	.discharge        = spitz_discharge,
207	.discharge1       = spitz_discharge1,
208	.charge           = spitz_charge,
209	.measure_temp     = spitz_measure_temp,
210	.presuspend       = spitz_presuspend,
211	.postsuspend      = spitz_postsuspend,
212	.read_devdata     = spitzpm_read_devdata,
213	.charger_wakeup   = spitz_charger_wakeup,
214	.should_wakeup    = spitz_should_wakeup,
215#if defined(CONFIG_LCD_CORGI)
216	.backlight_limit = corgi_lcd_limit_intensity,
217#endif
218	.charge_on_volt	  = SHARPSL_CHARGE_ON_VOLT,
219	.charge_on_temp	  = SHARPSL_CHARGE_ON_TEMP,
220	.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
221	.charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
222	.fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
223	.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
224	.bat_levels       = 40,
225	.bat_levels_noac  = sharpsl_battery_levels_noac,
226	.bat_levels_acin  = sharpsl_battery_levels_acin,
227	.status_high_acin = 188,
228	.status_low_acin  = 178,
229	.status_high_noac = 185,
230	.status_low_noac  = 175,
231};
232
233static struct platform_device *spitzpm_device;
234
235static int spitzpm_init(void)
236{
237	int ret;
238
239	if (!machine_is_spitz() && !machine_is_akita()
240			&& !machine_is_borzoi())
241		return -ENODEV;
242
243	spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
244	if (!spitzpm_device)
245		return -ENOMEM;
246
247	spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
248	ret = platform_device_add(spitzpm_device);
249
250	if (ret)
251		platform_device_put(spitzpm_device);
252
253	return ret;
254}
255
256static void spitzpm_exit(void)
257{
258	platform_device_unregister(spitzpm_device);
259}
260
261module_init(spitzpm_init);
262module_exit(spitzpm_exit);
263