[ARM] 3158/1: SharpSL: Add PM device driver for the SL-C7x0 machines.

Patch from Richard Purdie

Add a SharpSL PM device driver for the SL-C7x0 machines.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2 files changed, 229 insertions, 1 deletions

diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index d210bd5032ce..eecc5c199678 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -11,7 +11,7 @@ obj-$(CONFIG_PXA27x) += pxa27x.o
 obj-$(CONFIG_ARCH_LUBBOCK) += lubbock.o
 obj-$(CONFIG_MACH_MAINSTONE) += mainstone.o
 obj-$(CONFIG_ARCH_PXA_IDP) += idp.o
-obj-$(CONFIG_PXA_SHARP_C7xx)	+= corgi.o corgi_ssp.o corgi_lcd.o
+obj-$(CONFIG_PXA_SHARP_C7xx)	+= corgi.o corgi_ssp.o corgi_lcd.o sharpsl_pm.o corgi_pm.o
 obj-$(CONFIG_PXA_SHARP_Cxx00)	+= spitz.o corgi_ssp.o corgi_lcd.o
 obj-$(CONFIG_MACH_POODLE)	+= poodle.o
 obj-$(CONFIG_MACH_TOSA)         += tosa.o
diff --git a/arch/arm/mach-pxa/corgi_pm.c b/arch/arm/mach-pxa/corgi_pm.c
new file mode 100644
index 000000000000..599be14754f9
--- /dev/null
+++ b/arch/arm/mach-pxa/corgi_pm.c
@@ -0,0 +1,228 @@
+/*
+ * Battery and Power Management code for the Sharp SL-C7xx
+ *
+ * Copyright (c) 2005 Richard Purdie
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/stat.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <asm/apm.h>
+#include <asm/irq.h>
+#include <asm/mach-types.h>
+#include <asm/hardware.h>
+#include <asm/hardware/scoop.h>
+
+#include <asm/arch/sharpsl.h>
+#include <asm/arch/corgi.h>
+#include <asm/arch/pxa-regs.h>
+#include "sharpsl.h"
+
+static void corgi_charger_init(void)
+{
+	pxa_gpio_mode(CORGI_GPIO_ADC_TEMP_ON | GPIO_OUT);
+	pxa_gpio_mode(CORGI_GPIO_CHRG_ON | GPIO_OUT);
+	pxa_gpio_mode(CORGI_GPIO_CHRG_UKN | GPIO_OUT);
+	pxa_gpio_mode(CORGI_GPIO_KEY_INT | GPIO_IN);
+}
+
+static void corgi_charge_led(int val)
+{
+	if (val == SHARPSL_LED_ERROR) {
+		dev_dbg(sharpsl_pm.dev, "Charge LED Error\n");
+	} else if (val == SHARPSL_LED_ON) {
+		dev_dbg(sharpsl_pm.dev, "Charge LED On\n");
+		GPSR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
+	} else {
+		dev_dbg(sharpsl_pm.dev, "Charge LED Off\n");
+		GPCR0 = GPIO_bit(CORGI_GPIO_LED_ORANGE);
+	}
+}
+
+static void corgi_measure_temp(int on)
+{
+	if (on)
+		GPSR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
+	else
+		GPCR(CORGI_GPIO_ADC_TEMP_ON) = GPIO_bit(CORGI_GPIO_ADC_TEMP_ON);
+}
+
+static void corgi_charge(int on)
+{
+	if (on) {
+		if (machine_is_corgi() && (sharpsl_pm.flags & SHARPSL_SUSPENDED)) {
+			GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+			GPSR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+		} else {
+			GPSR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+			GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+		}
+	} else {
+		GPCR(CORGI_GPIO_CHRG_ON) = GPIO_bit(CORGI_GPIO_CHRG_ON);
+		GPCR(CORGI_GPIO_CHRG_UKN) = GPIO_bit(CORGI_GPIO_CHRG_UKN);
+	}
+}
+
+static void corgi_discharge(int on)
+{
+	if (on)
+		GPSR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
+	else
+		GPCR(CORGI_GPIO_DISCHARGE_ON) = GPIO_bit(CORGI_GPIO_DISCHARGE_ON);
+}
+
+static void corgi_presuspend(void)
+{
+	int i;
+	unsigned long wakeup_mask;
+
+	/* charging , so CHARGE_ON bit is HIGH during OFF. */
+	if (READ_GPIO_BIT(CORGI_GPIO_CHRG_ON))
+		PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_ON);
+	else
+		PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_ON);
+
+	if (READ_GPIO_BIT(CORGI_GPIO_LED_ORANGE))
+		PGSR0 |= GPIO_bit(CORGI_GPIO_LED_ORANGE);
+	else
+		PGSR0 &= ~GPIO_bit(CORGI_GPIO_LED_ORANGE);
+
+	if (READ_GPIO_BIT(CORGI_GPIO_CHRG_UKN))
+		PGSR1 |= GPIO_bit(CORGI_GPIO_CHRG_UKN);
+	else
+		PGSR1 &= ~GPIO_bit(CORGI_GPIO_CHRG_UKN);
+
+	/* Resume on keyboard power key */
+	PGSR2 = (PGSR2 & ~CORGI_GPIO_ALL_STROBE_BIT) | CORGI_GPIO_STROBE_BIT(0);
+
+	wakeup_mask = GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) | GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_CHRG_FULL);
+
+	if (!machine_is_corgi())
+		wakeup_mask |= GPIO_bit(CORGI_GPIO_MAIN_BAT_LOW);
+
+	PWER = wakeup_mask | PWER_RTC;
+	PRER = wakeup_mask;
+	PFER = wakeup_mask;
+
+	for (i = 0; i <=15; i++) {
+		if (PRER & PFER & GPIO_bit(i)) {
+			if (GPLR0 & GPIO_bit(i) )
+				PRER &= ~GPIO_bit(i);
+			else
+				PFER &= ~GPIO_bit(i);
+		}
+	}
+}
+
+static void corgi_postsuspend(void)
+{
+}
+
+/*
+ * Check what brought us out of the suspend.
+ * Return: 0 to sleep, otherwise wake
+ */
+static int corgi_should_wakeup(unsigned int resume_on_alarm)
+{
+	int is_resume = 0;
+
+	dev_dbg(sharpsl_pm.dev, "GPLR0 = %x,%x\n", GPLR0, PEDR);
+
+	if ((PEDR & GPIO_bit(CORGI_GPIO_AC_IN))) {
+		if (STATUS_AC_IN()) {
+			/* charge on */
+			dev_dbg(sharpsl_pm.dev, "ac insert\n");
+			sharpsl_pm.flags |= SHARPSL_DO_OFFLINE_CHRG;
+		} else {
+			/* charge off */
+			dev_dbg(sharpsl_pm.dev, "ac remove\n");
+			CHARGE_LED_OFF();
+			CHARGE_OFF();
+			sharpsl_pm.charge_mode = CHRG_OFF;
+		}
+	}
+
+	if ((PEDR & GPIO_bit(CORGI_GPIO_CHRG_FULL)))
+		dev_dbg(sharpsl_pm.dev, "Charge full interrupt\n");
+
+	if (PEDR & GPIO_bit(CORGI_GPIO_KEY_INT))
+		is_resume |= GPIO_bit(CORGI_GPIO_KEY_INT);
+
+	if (PEDR & GPIO_bit(CORGI_GPIO_WAKEUP))
+		is_resume |= GPIO_bit(CORGI_GPIO_WAKEUP);
+
+	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 unsigned long corgi_charger_wakeup(void)
+{
+	return ~GPLR0 & ( GPIO_bit(CORGI_GPIO_AC_IN) | GPIO_bit(CORGI_GPIO_KEY_INT) | GPIO_bit(CORGI_GPIO_WAKEUP) );
+}
+
+static int corgi_acin_status(void)
+{
+	return ((GPLR(CORGI_GPIO_AC_IN) & GPIO_bit(CORGI_GPIO_AC_IN)) != 0);
+}
+
+static struct sharpsl_charger_machinfo corgi_pm_machinfo = {
+	.init            = corgi_charger_init,
+	.gpio_batlock    = CORGI_GPIO_BAT_COVER,
+	.gpio_acin       = CORGI_GPIO_AC_IN,
+	.gpio_batfull    = CORGI_GPIO_CHRG_FULL,
+	.status_acin     = corgi_acin_status,
+	.discharge       = corgi_discharge,
+	.charge          = corgi_charge,
+	.chargeled       = corgi_charge_led,
+	.measure_temp    = corgi_measure_temp,
+	.presuspend      = corgi_presuspend,
+	.postsuspend     = corgi_postsuspend,
+	.charger_wakeup  = corgi_charger_wakeup,
+	.should_wakeup   = corgi_should_wakeup,
+	.bat_levels      = 40,
+	.bat_levels_noac = spitz_battery_levels_noac,
+	.bat_levels_acin = spitz_battery_levels_acin,
+	.status_high_acin = 188,
+	.status_low_acin  = 178,
+	.status_high_noac = 185,
+	.status_low_noac  = 175,
+};
+
+static struct platform_device *corgipm_device;
+
+static int __devinit corgipm_init(void)
+{
+	int ret;
+
+	corgipm_device = platform_device_alloc("sharpsl-pm", -1);
+	if (!corgipm_device)
+		return -ENOMEM;
+
+	corgipm_device->dev.platform_data = &corgi_pm_machinfo;
+	ret = platform_device_add(corgipm_device);
+
+	if (ret)
+		platform_device_put(corgipm_device);
+
+	return ret;
+}
+
+static void corgipm_exit(void)
+{
+	platform_device_unregister(corgipm_device);
+}
+
+module_init(corgipm_init);
+module_exit(corgipm_exit);