1 files changed, 254 insertions, 0 deletions
diff --git a/arch/arm/mach-pxa/spitz_pm.c b/arch/arm/mach-pxa/spitz_pm.c
new file mode 100644
index 000000000..6689b67f9
--- /dev/null
+++ b/arch/arm/mach-pxa/spitz_pm.c
@@ -0,0 +1,254 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Battery and Power Management code for the Sharp SL-Cxx00
+ *
+ * Copyright (c) 2005 Richard Purdie
+ */
+
+#include <linux/module.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/gpio-pxa.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/apm-emulation.h>
+
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+
+#include "spitz.h"
+#include "pxa27x.h"
+#include "sharpsl_pm.h"
+
+#include "generic.h"
+
+#define SHARPSL_CHARGE_ON_VOLT         0x99  /* 2.9V */
+#define SHARPSL_CHARGE_ON_TEMP         0xe0  /* 2.9V */
+#define SHARPSL_CHARGE_ON_ACIN_HIGH    0x9b  /* 6V */
+#define SHARPSL_CHARGE_ON_ACIN_LOW     0x34  /* 2V */
+#define SHARPSL_FATAL_ACIN_VOLT        182   /* 3.45V */
+#define SHARPSL_FATAL_NOACIN_VOLT      170   /* 3.40V */
+
+static int spitz_last_ac_status;
+
+static struct gpio spitz_charger_gpios[] = {
+	{ SPITZ_GPIO_KEY_INT,	GPIOF_IN, "Keyboard Interrupt" },
+	{ SPITZ_GPIO_SYNC,	GPIOF_IN, "Sync" },
+	{ SPITZ_GPIO_AC_IN,     GPIOF_IN, "Charger Detection" },
+	{ SPITZ_GPIO_ADC_TEMP_ON, GPIOF_OUT_INIT_LOW, "ADC Temp On" },
+	{ SPITZ_GPIO_JK_B,	  GPIOF_OUT_INIT_LOW, "JK B" },
+	{ SPITZ_GPIO_CHRG_ON,	  GPIOF_OUT_INIT_LOW, "Charger On" },
+};
+
+static void spitz_charger_init(void)
+{
+	gpio_request_array(ARRAY_AND_SIZE(spitz_charger_gpios));
+}
+
+static void spitz_measure_temp(int on)
+{
+	gpio_set_value(SPITZ_GPIO_ADC_TEMP_ON, on);
+}
+
+static void spitz_charge(int on)
+{
+	if (on) {
+		if (sharpsl_pm.flags & SHARPSL_SUSPENDED) {
+			gpio_set_value(SPITZ_GPIO_JK_B, 1);
+			gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+		} else {
+			gpio_set_value(SPITZ_GPIO_JK_B, 0);
+			gpio_set_value(SPITZ_GPIO_CHRG_ON, 0);
+		}
+	} else {
+		gpio_set_value(SPITZ_GPIO_JK_B, 0);
+		gpio_set_value(SPITZ_GPIO_CHRG_ON, 1);
+	}
+}
+
+static void spitz_discharge(int on)
+{
+	gpio_set_value(SPITZ_GPIO_JK_A, on);
+}
+
+/* HACK - For unknown reasons, accurate voltage readings are only made with a load
+   on the power bus which the green led on spitz provides */
+static void spitz_discharge1(int on)
+{
+	gpio_set_value(SPITZ_GPIO_LED_GREEN, on);
+}
+
+static unsigned long gpio18_config = GPIO18_GPIO;
+
+static void spitz_presuspend(void)
+{
+	spitz_last_ac_status = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+
+	/* GPIO Sleep Register */
+	PGSR0 = 0x00144018;
+	PGSR1 = 0x00EF0000;
+	if (machine_is_akita()) {
+		PGSR2 = 0x2121C000;
+		PGSR3 = 0x00600400;
+	} else {
+		PGSR2 = 0x0121C000;
+		PGSR3 = 0x00600000;
+	}
+
+	PGSR0 &= ~SPITZ_GPIO_G0_STROBE_BIT;
+	PGSR1 &= ~SPITZ_GPIO_G1_STROBE_BIT;
+	PGSR2 &= ~SPITZ_GPIO_G2_STROBE_BIT;
+	PGSR3 &= ~SPITZ_GPIO_G3_STROBE_BIT;
+	PGSR2 |= GPIO_bit(SPITZ_GPIO_KEY_STROBE0);
+
+	pxa2xx_mfp_config(&gpio18_config, 1);
+	gpio_request_one(18, GPIOF_OUT_INIT_HIGH, "Unknown");
+	gpio_free(18);
+
+	PRER = GPIO_bit(SPITZ_GPIO_KEY_INT);
+	PFER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
+	PWER = GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET) | PWER_RTC;
+	PKWR = GPIO_bit(SPITZ_GPIO_SYNC) | GPIO_bit(SPITZ_GPIO_KEY_INT) | GPIO_bit(SPITZ_GPIO_RESET);
+	PKSR = 0xffffffff; /* clear */
+
+	/* nRESET_OUT Disable */
+	PSLR |= PSLR_SL_ROD;
+
+	/* Stop 3.6MHz and drive HIGH to PCMCIA and CS */
+	PCFR = PCFR_GPR_EN | PCFR_OPDE;
+}
+
+static void spitz_postsuspend(void)
+{
+}
+
+static int spitz_should_wakeup(unsigned int resume_on_alarm)
+{
+	int is_resume = 0;
+	int acin = sharpsl_pm.machinfo->read_devdata(SHARPSL_STATUS_ACIN);
+
+	if (spitz_last_ac_status != acin) {
+		if (acin) {
+			/* charge on */
+			sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
+			dev_dbg(sharpsl_pm.dev, "AC Inserted\n");
+		} else {
+			/* charge off */
+			dev_dbg(sharpsl_pm.dev, "AC Removed\n");
+			sharpsl_pm_led(SHARPSL_LED_OFF);
+			sharpsl_pm.machinfo->charge(0);
+			sharpsl_pm.charge_mode = CHRG_OFF;
+		}
+		spitz_last_ac_status = acin;
+		/* Return to suspend as this must be what we were woken for */
+		return 0;
+	}
+
+	if (PEDR & GPIO_bit(SPITZ_GPIO_KEY_INT))
+		is_resume |= GPIO_bit(SPITZ_GPIO_KEY_INT);
+
+	if (PKSR & GPIO_bit(SPITZ_GPIO_SYNC))
+		is_resume |= GPIO_bit(SPITZ_GPIO_SYNC);
+
+	if (resume_on_alarm && (PEDR & PWER_RTC))
+		is_resume |= PWER_RTC;
+
+	dev_dbg(sharpsl_pm.dev, "is_resume: %x\n", is_resume);
+	return is_resume;
+}
+
+static bool spitz_charger_wakeup(void)
+{
+	return !gpio_get_value(SPITZ_GPIO_KEY_INT) ||
+		gpio_get_value(SPITZ_GPIO_SYNC);
+}
+
+unsigned long spitzpm_read_devdata(int type)
+{
+	switch (type) {
+	case SHARPSL_STATUS_ACIN:
+		return !gpio_get_value(SPITZ_GPIO_AC_IN);
+	case SHARPSL_STATUS_LOCK:
+		return gpio_get_value(sharpsl_pm.machinfo->gpio_batlock);
+	case SHARPSL_STATUS_CHRGFULL:
+		return gpio_get_value(sharpsl_pm.machinfo->gpio_batfull);
+	case SHARPSL_STATUS_FATAL:
+		return gpio_get_value(sharpsl_pm.machinfo->gpio_fatal);
+	case SHARPSL_ACIN_VOLT:
+		return sharpsl_pm_pxa_read_max1111(MAX1111_ACIN_VOLT);
+	case SHARPSL_BATT_TEMP:
+		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_TEMP);
+	case SHARPSL_BATT_VOLT:
+	default:
+		return sharpsl_pm_pxa_read_max1111(MAX1111_BATT_VOLT);
+	}
+}
+
+struct sharpsl_charger_machinfo spitz_pm_machinfo = {
+	.init             = spitz_charger_init,
+	.exit             = NULL,
+	.gpio_batlock     = SPITZ_GPIO_BAT_COVER,
+	.gpio_acin        = SPITZ_GPIO_AC_IN,
+	.gpio_batfull     = SPITZ_GPIO_CHRG_FULL,
+	.batfull_irq	  = 1,
+	.gpio_fatal       = SPITZ_GPIO_FATAL_BAT,
+	.discharge        = spitz_discharge,
+	.discharge1       = spitz_discharge1,
+	.charge           = spitz_charge,
+	.measure_temp     = spitz_measure_temp,
+	.presuspend       = spitz_presuspend,
+	.postsuspend      = spitz_postsuspend,
+	.read_devdata     = spitzpm_read_devdata,
+	.charger_wakeup   = spitz_charger_wakeup,
+	.should_wakeup    = spitz_should_wakeup,
+#if defined(CONFIG_LCD_CORGI)
+	.backlight_limit = corgi_lcd_limit_intensity,
+#endif
+	.charge_on_volt	  = SHARPSL_CHARGE_ON_VOLT,
+	.charge_on_temp	  = SHARPSL_CHARGE_ON_TEMP,
+	.charge_acin_high = SHARPSL_CHARGE_ON_ACIN_HIGH,
+	.charge_acin_low  = SHARPSL_CHARGE_ON_ACIN_LOW,
+	.fatal_acin_volt  = SHARPSL_FATAL_ACIN_VOLT,
+	.fatal_noacin_volt= SHARPSL_FATAL_NOACIN_VOLT,
+	.bat_levels       = 40,
+	.bat_levels_noac  = sharpsl_battery_levels_noac,
+	.bat_levels_acin  = sharpsl_battery_levels_acin,
+	.status_high_acin = 188,
+	.status_low_acin  = 178,
+	.status_high_noac = 185,
+	.status_low_noac  = 175,
+};
+
+static struct platform_device *spitzpm_device;
+
+static int spitzpm_init(void)
+{
+	int ret;
+
+	if (!machine_is_spitz() && !machine_is_akita()
+			&& !machine_is_borzoi())
+		return -ENODEV;
+
+	spitzpm_device = platform_device_alloc("sharpsl-pm", -1);
+	if (!spitzpm_device)
+		return -ENOMEM;
+
+	spitzpm_device->dev.platform_data = &spitz_pm_machinfo;
+	ret = platform_device_add(spitzpm_device);
+
+	if (ret)
+		platform_device_put(spitzpm_device);
+
+	return ret;
+}
+
+static void spitzpm_exit(void)
+{
+	platform_device_unregister(spitzpm_device);
+}
+
+module_init(spitzpm_init);
+module_exit(spitzpm_exit);