gta01-power_control.patch

[PATCH] Neo1973 GPS / GSM / Bluetooth power control via sysfs

Signed-off-by: Harald Welte <laforge@openmoko.org>

4 files changed, 930 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index 763d3444048..b3bd4238f24 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -43,3 +43,4 @@ obj-$(CONFIG_S3C24XX_SPI_BUS1_GPG5_GPG6_GPG7)    += spi-bus1-gpg5_6_7.o
 # machine common support
 
 obj-$(CONFIG_MACH_SMDK)		+= common-smdk.o
+obj-$(CONFIG_MACH_NEO1973)	+= neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_bt.c b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
new file mode 100644
index 00000000000..b1af441f7fa
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_bt.c
@@ -0,0 +1,152 @@
+/*
+ * Bluetooth PM code for the FIC Neo1973 GSM Phone
+ *
+ * (C) 2007 by OpenMoko Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * All rights reserved.
+ *
+ * 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/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+
+#include <linux/pcf50606.h>
+
+#include <asm/hardware.h>
+#include <asm/arch/gta01.h>
+
+#define DRVMSG "FIC Neo1973 Bluetooth Power Management"
+
+static ssize_t bt_read(struct device *dev, struct device_attribute *attr,
+		       char *buf)
+{
+	if (!strcmp(attr->attr.name, "power_on")) {
+		if (pcf50606_onoff_get(pcf50606_global,
+					PCF50606_REGULATOR_D1REG) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_D1REG) == 3100)
+			goto out_1;
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		if (s3c2410_gpio_getpin(GTA01_GPIO_BT_EN) == 0)
+			goto out_1;
+	}
+
+	return strlcpy(buf, "0\n", 3);
+out_1:
+	return strlcpy(buf, "1\n", 3);
+}
+
+static ssize_t bt_write(struct device *dev, struct device_attribute *attr,
+			const char *buf, size_t count)
+{
+	unsigned long on = simple_strtoul(buf, NULL, 10);
+
+	if (!strcmp(attr->attr.name, "power_on")) {
+		/* if we are powering up, assert reset, then power, then
+		 * release reset */
+		if (on) {
+			s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_D1REG,
+					     3100);
+		}
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_D1REG, on);
+		s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on);
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		/* reset is low-active, so we need to invert */
+		s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, on ? 0 : 1);
+	}
+
+	return count;
+}
+
+static DEVICE_ATTR(power_on, 0644, bt_read, bt_write);
+static DEVICE_ATTR(reset, 0644, bt_read, bt_write);
+
+#ifdef CONFIG_PM
+static int gta01_bt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	dev_dbg(&pdev->dev, DRVMSG ": suspending\n");
+	/* FIXME: The PMU should save the PMU status, and the GPIO code should
+	 * preserve the GPIO level, so there shouldn't be anything left to do
+	 * for us, should there? */
+
+	return 0;
+}
+
+static int gta01_bt_resume(struct platform_device *pdev)
+{
+	dev_dbg(&pdev->dev, DRVMSG ": resuming\n");
+
+	return 0;
+}
+#else
+#define gta01_bt_suspend	NULL
+#define gta01_bt_resume		NULL
+#endif
+
+static struct attribute *gta01_bt_sysfs_entries[] = {
+	&dev_attr_power_on.attr,
+	&dev_attr_reset.attr,
+	NULL
+};
+
+static struct attribute_group gta01_bt_attr_group = {
+	.name	= NULL,
+	.attrs	= gta01_bt_sysfs_entries,
+};
+
+static int __init gta01_bt_probe(struct platform_device *pdev)
+{
+	dev_info(&pdev->dev, DRVMSG ": starting\n");
+
+	/* we make sure that the voltage is off */
+	pcf50606_onoff_set(pcf50606_global,
+			   PCF50606_REGULATOR_D1REG, 0);
+	/* we pull reset to low to make sure that the chip doesn't
+	 * drain power through the reset line */
+	s3c2410_gpio_setpin(GTA01_GPIO_BT_EN, 0);
+
+	return sysfs_create_group(&pdev->dev.kobj, &gta01_bt_attr_group);
+}
+
+static int gta01_bt_remove(struct platform_device *pdev)
+{
+	sysfs_remove_group(&pdev->dev.kobj, &gta01_bt_attr_group);
+
+	return 0;
+}
+
+static struct platform_driver gta01_bt_driver = {
+	.probe		= gta01_bt_probe,
+	.remove		= gta01_bt_remove,
+	.suspend	= gta01_bt_suspend,
+	.resume		= gta01_bt_resume,
+	.driver		= {
+		.name		= "neo1973-pm-bt",
+	},
+};
+
+static int __devinit gta01_bt_init(void)
+{
+	return platform_driver_register(&gta01_bt_driver);
+}
+
+static void gta01_bt_exit(void)
+{
+	platform_driver_unregister(&gta01_bt_driver);
+}
+
+module_init(gta01_bt_init);
+module_exit(gta01_bt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION(DRVMSG);
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gps.c b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
new file mode 100644
index 00000000000..f8cf7199d2a
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gps.c
@@ -0,0 +1,560 @@
+/*
+ * GPS Power Management code for the FIC Neo1973 GSM Phone
+ *
+ * (C) 2007 by OpenMoko Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * All rights reserved.
+ *
+ * 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/init.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+
+#include <linux/pcf50606.h>
+
+#include <asm/hardware.h>
+#include <asm/arch/gta01.h>
+
+/* This is the 2.8V supply for the RTC crystal, the mail clock crystal and
+ * the input to VDD_RF */
+static void gps_power_2v8_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+		if (on)
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_IOREG, 2800);
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_IOREG, on);
+		break;
+	case GTA01Bv2_SYSTEM_REV:
+		s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_2V8, on);
+			break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		break;
+	}
+}
+
+static int gps_power_2v8_get(void)
+{
+	int ret = 0;
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+		if (pcf50606_onoff_get(pcf50606_global,
+					PCF50606_REGULATOR_IOREG) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_IOREG) == 2800)
+			ret = 1;
+		break;
+	case GTA01Bv2_SYSTEM_REV:
+		if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_2V8))
+			ret = 1;
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		break;
+	}
+
+	return ret;
+}
+
+/* This is the 3V supply (AVDD) for the external RF frontend (LNA bias) */
+static void gps_power_3v_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+		if (on)
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_D1REG, 3000);
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_D1REG, on);
+		break;
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_3V, on);
+		break;
+	}
+}
+
+static int gps_power_3v_get(void)
+{
+	int ret = 0;
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+		if (pcf50606_onoff_get(pcf50606_global,
+				       PCF50606_REGULATOR_D1REG) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_D1REG) == 3000)
+			ret = 1;
+		break;
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_3V))
+			ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+/* This is the 3.3V supply for VDD_IO and VDD_LPREG input */
+static void gps_power_3v3_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		if (on)
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_DCD, 3300);
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_DCD, on);
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		s3c2410_gpio_setpin(GTA01_GPIO_GPS_EN_3V3, on);
+		break;
+	}
+}
+
+static int gps_power_3v3_get(void)
+{
+	int ret = 0;
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		if (pcf50606_onoff_get(pcf50606_global,
+				       PCF50606_REGULATOR_DCD) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_DCD) == 3300)
+			ret = 1;
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_EN_3V3))
+			ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+/* This is the 2.5V supply for VDD_PLLREG and VDD_COREREG input */
+static void gps_power_2v5_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		/* This is CORE_1V8 and cannot be disabled */
+		break;
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (on)
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_D2REG, 2500);
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_D2REG, on);
+		break;
+	}
+}
+
+static int gps_power_2v5_get(void)
+{
+	int ret = 0;
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		/* This is CORE_1V8 and cannot be disabled */
+		ret = 1;
+		break;
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (pcf50606_onoff_get(pcf50606_global,
+				       PCF50606_REGULATOR_D2REG) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_D2REG) == 2500)
+			ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+/* This is the 1.5V supply for VDD_CORE */
+static void gps_power_1v5_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		/* This is switched via 2v5 */
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (on)
+			pcf50606_voltage_set(pcf50606_global,
+					     PCF50606_REGULATOR_DCD, 1500);
+		pcf50606_onoff_set(pcf50606_global,
+				   PCF50606_REGULATOR_DCD, on);
+		break;
+	}
+}
+
+static int gps_power_1v5_get(void)
+{
+	int ret = 0;
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		/* This is switched via 2v5 */
+		ret = 1;
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (pcf50606_onoff_get(pcf50606_global,
+				       PCF50606_REGULATOR_DCD) &&
+		    pcf50606_voltage_get(pcf50606_global,
+					 PCF50606_REGULATOR_DCD) == 1500)
+			ret = 1;
+		break;
+	}
+
+	return ret;
+}
+
+/* This is the POWERON pin */
+static void gps_pwron_set(int on)
+{
+	s3c2410_gpio_setpin(GTA01_GPIO_GPS_PWRON, on);
+}
+
+static int gps_pwron_get(void)
+{
+	if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_PWRON))
+		return 1;
+	else
+		return 0;
+}
+
+/* This is the nRESET pin */
+static void gps_rst_set(int on)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		pcf50606_gpo0_set(pcf50606_global, on);
+		break;
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		s3c2410_gpio_setpin(GTA01_GPIO_GPS_RESET, on);
+		break;
+	}
+}
+
+static int gps_rst_get(void)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		if (pcf50606_gpo0_get(pcf50606_global))
+			return 1;
+		break;
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		if (s3c2410_gpio_getpin(GTA01_GPIO_GPS_RESET))
+			return 1;
+		break;
+	}
+
+	return 0;
+}
+
+static ssize_t power_gps_read(struct device *dev,
+			      struct device_attribute *attr, char *buf)
+{
+	int ret = 0;
+
+	if (!strcmp(attr->attr.name, "power_tcxo_2v8")) {
+		ret = gps_power_2v8_get();
+	} else if (!strcmp(attr->attr.name, "power_avdd_3v")) {
+		ret = gps_power_3v_get();
+	} else if (!strcmp(attr->attr.name, "pwron")) {
+		ret = gps_pwron_get();
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		ret = gps_rst_get();
+	} else if (!strcmp(attr->attr.name, "power_lp_io_3v3")) {
+		ret = gps_power_3v3_get();
+	} else if (!strcmp(attr->attr.name, "power_pll_core_2v5")) {
+		ret = gps_power_2v5_get();
+	} else if (!strcmp(attr->attr.name, "power_core_1v5") ||
+		   !strcmp(attr->attr.name, "power_vdd_core_1v5")) {
+		ret = gps_power_1v5_get();
+	}
+
+	if (ret)
+		return strlcpy(buf, "1\n", 3);
+	else
+		return strlcpy(buf, "0\n", 3);
+}
+
+static ssize_t power_gps_write(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t count)
+{
+	unsigned long on = simple_strtoul(buf, NULL, 10);
+
+	if (!strcmp(attr->attr.name, "power_tcxo_2v8")) {
+		gps_power_2v8_set(on);
+	} else if (!strcmp(attr->attr.name, "power_avdd_3v")) {
+		gps_power_3v_set(on);
+	} else if (!strcmp(attr->attr.name, "pwron")) {
+		gps_pwron_set(on);
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		gps_rst_set(on);
+	} else if (!strcmp(attr->attr.name, "power_lp_io_3v3")) {
+		gps_power_3v3_set(on);
+	} else if (!strcmp(attr->attr.name, "power_pll_core_2v5")) {
+		gps_power_2v5_set(on);
+	} else if (!strcmp(attr->attr.name, "power_core_1v5") ||
+		   !strcmp(attr->attr.name, "power_vdd_core_1v5")) {
+		gps_power_1v5_set(on);
+	}
+
+	return count;
+}
+
+static void gps_power_sequence_up(void)
+{
+	/* According to PMB2520 Data Sheet, Rev. 2006-06-05,
+	 * Chapter 4.2.2 */
+
+	/* nRESET must be asserted low */
+	gps_rst_set(0);
+
+	/* POWERON must be de-asserted (low) */
+	gps_pwron_set(0);
+
+	/* Apply VDD_IO and VDD_LPREG_IN */
+	gps_power_3v3_set(1);
+
+	/* VDD_COREREG_IN, VDD_PLLREG_IN */
+	gps_power_1v5_set(1);
+	gps_power_2v5_set(1);
+
+	/* and VDD_RF may be applied */
+	gps_power_2v8_set(1);
+
+	/* We need to enable AVDD, since in GTA01Bv3 it is
+	 * shared with RFREG_IN */
+	gps_power_3v_set(1);
+
+	msleep(3); 	/* Is 3ms enough? */
+
+	/* De-asert nRESET */
+	gps_rst_set(1);
+
+	/* Switch power on */
+	gps_pwron_set(1);
+
+}
+
+static void gps_power_sequence_down(void)
+{
+	/* According to PMB2520 Data Sheet, Rev. 2006-06-05,
+	 * Chapter 4.2.3.1 */
+	gps_pwron_set(0);
+
+	/* Don't disable AVDD before PWRON is cleared, since
+	 * in GTA01Bv3, AVDD and RFREG_IN are shared */
+	gps_power_3v_set(0);
+
+	/* Remove VDD_COREREG_IN, VDD_PLLREG_IN and VDD_REFREG_IN */
+	gps_power_1v5_set(0);
+	gps_power_2v5_set(0);
+	gps_power_2v8_set(0);
+
+	/* Remove VDD_LPREG_IN and VDD_IO */
+	gps_power_3v3_set(0);
+}
+
+
+static ssize_t power_sequence_read(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
+{
+	return strlcpy(buf, "power_up power_down\n", PAGE_SIZE);
+}
+
+static ssize_t power_sequence_write(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	dev_dbg(dev, "wrote: '%s'\n", buf);
+
+	if (!strncmp(buf, "power_up", 8))
+		gps_power_sequence_up();
+	else if (!strncmp(buf, "power_down", 10))
+		gps_power_sequence_down();
+	else
+		return -EINVAL;
+
+	return count;
+}
+
+static DEVICE_ATTR(power_tcxo_2v8, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_avdd_3v, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(pwron, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(reset, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_lp_io_3v3, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_pll_core_2v5, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_core_1v5, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_vdd_core_1v5, 0644, power_gps_read, power_gps_write);
+static DEVICE_ATTR(power_sequence, 0644, power_sequence_read,
+		   power_sequence_write);
+
+#ifdef CONFIG_PM
+static int gta01_pm_gps_suspend(struct platform_device *pdev,
+				pm_message_t state)
+{
+	/* FIXME */
+	gps_power_sequence_down();
+
+	return 0;
+}
+
+static int gta01_pm_gps_resume(struct platform_device *pdev)
+{
+	/* FIXME */
+	gps_power_sequence_up();
+
+	return 0;
+}
+#else
+#define gta01_pm_gps_suspend	NULL
+#define gta01_pm_gps_resume	NULL
+#endif
+
+static struct attribute *gta01_gps_sysfs_entries[] = {
+	&dev_attr_power_avdd_3v.attr,
+	&dev_attr_pwron.attr,
+	&dev_attr_reset.attr,
+	&dev_attr_power_lp_io_3v3.attr,
+	&dev_attr_power_pll_core_2v5.attr,
+	&dev_attr_power_sequence.attr,
+	NULL,	/* power_core_1v5 */
+	NULL,	/* power_vdd_core_1v5 */
+	NULL	/* terminating entry */
+};
+
+static struct attribute_group gta01_gps_attr_group = {
+	.name	= NULL,
+	.attrs	= gta01_gps_sysfs_entries,
+};
+
+static int __init gta01_pm_gps_probe(struct platform_device *pdev)
+{
+	s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_PWRON, S3C2410_GPIO_OUTPUT);
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		break;
+	case GTA01v4_SYSTEM_REV:
+		s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_RESET, S3C2410_GPIO_OUTPUT);
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_3V3, S3C2410_GPIO_OUTPUT);
+		/* fallthrough */
+	case GTA01Bv2_SYSTEM_REV:
+		s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_2V8, S3C2410_GPIO_OUTPUT);
+		s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_EN_3V, S3C2410_GPIO_OUTPUT);
+		s3c2410_gpio_cfgpin(GTA01_GPIO_GPS_RESET, S3C2410_GPIO_OUTPUT);
+		break;
+	default:
+		dev_warn(&pdev->dev, "Unknown GTA01 Revision 0x%x, "
+			 "AGPS PM features not available!!!\n",
+			 system_rev);
+		return -1;
+		break;
+	}
+
+	gps_power_sequence_down();
+
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-3] =
+					&dev_attr_power_tcxo_2v8.attr;
+		break;
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-3] =
+					&dev_attr_power_core_1v5.attr;
+		gta01_gps_sysfs_entries[ARRAY_SIZE(gta01_gps_sysfs_entries)-2] =
+					&dev_attr_power_vdd_core_1v5.attr;
+		break;
+	}
+
+	return sysfs_create_group(&pdev->dev.kobj, &gta01_gps_attr_group);
+}
+
+static int gta01_pm_gps_remove(struct platform_device *pdev)
+{
+	gps_power_sequence_down();
+	sysfs_remove_group(&pdev->dev.kobj, &gta01_gps_attr_group);
+
+	return 0;
+}
+
+static struct platform_driver gta01_pm_gps_driver = {
+	.probe		= gta01_pm_gps_probe,
+	.remove		= gta01_pm_gps_remove,
+	.suspend	= gta01_pm_gps_suspend,
+	.resume		= gta01_pm_gps_resume,
+	.driver		= {
+		.name		= "neo1973-pm-gps",
+	},
+};
+
+static int __devinit gta01_pm_gps_init(void)
+{
+	return platform_driver_register(&gta01_pm_gps_driver);
+}
+
+static void gta01_pm_gps_exit(void)
+{
+	platform_driver_unregister(&gta01_pm_gps_driver);
+}
+
+module_init(gta01_pm_gps_init);
+module_exit(gta01_pm_gps_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION("FIC Neo1973 GPS Power Management");
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
new file mode 100644
index 00000000000..a1615f851eb
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_gsm.c
@@ -0,0 +1,217 @@
+/*
+ * GSM Management code for the FIC Neo1973 GSM Phone
+ *
+ * (C) 2007 by OpenMoko Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * All rights reserved.
+ *
+ * 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/init.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/console.h>
+#include <linux/errno.h>
+
+#include <asm/hardware.h>
+#include <asm/arch/gta01.h>
+
+struct gta01pm_priv {
+	int gpio_ngsm_en;
+	struct console *con;
+};
+
+static struct gta01pm_priv gta01_gsm;
+
+static struct console *find_s3c24xx_console(void)
+{
+	struct console *con;
+
+	acquire_console_sem();
+
+	for (con = console_drivers; con; con = con->next) {
+		if (!strcmp(con->name, "ttySAC"))
+			break;
+	}
+
+	release_console_sem();
+
+	return con;
+}
+
+static ssize_t gsm_read(struct device *dev, struct device_attribute *attr,
+			char *buf)
+{
+	if (!strcmp(attr->attr.name, "power_on")) {
+		if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON))
+			goto out_1;
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_RST))
+			goto out_1;
+	} else if (!strcmp(attr->attr.name, "download")) {
+		if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_DNLOAD))
+			goto out_1;
+	}
+
+	return strlcpy(buf, "0\n", 3);
+out_1:
+	return strlcpy(buf, "1\n", 3);
+}
+
+static ssize_t gsm_write(struct device *dev, struct device_attribute *attr,
+			 const char *buf, size_t count)
+{
+	unsigned long on = simple_strtoul(buf, NULL, 10);
+
+	if (!strcmp(attr->attr.name, "power_on")) {
+		if (on) {
+			dev_info(dev, "powering up GSM, thus disconnecting "
+				 "serial console\n");
+
+			if (gta01_gsm.con)
+				console_stop(gta01_gsm.con);
+
+			if (gta01_gsm.gpio_ngsm_en)
+				s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 0);
+
+			s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 1);
+		} else {
+			s3c2410_gpio_setpin(GTA01_GPIO_MODEM_ON, 0);
+
+			if (gta01_gsm.gpio_ngsm_en)
+				s3c2410_gpio_setpin(gta01_gsm.gpio_ngsm_en, 1);
+
+			if (gta01_gsm.con)
+				console_start(gta01_gsm.con);
+
+			dev_info(dev, "powered down GSM, thus enabling "
+				 "serial console\n");
+		}
+	} else if (!strcmp(attr->attr.name, "reset")) {
+		s3c2410_gpio_setpin(GTA01_GPIO_MODEM_RST, on);
+	} else if (!strcmp(attr->attr.name, "download")) {
+		s3c2410_gpio_setpin(GTA01_GPIO_MODEM_DNLOAD, on);
+	}
+
+	return count;
+}
+
+static DEVICE_ATTR(power_on, 0644, gsm_read, gsm_write);
+static DEVICE_ATTR(reset, 0644, gsm_read, gsm_write);
+static DEVICE_ATTR(download, 0644, gsm_read, gsm_write);
+
+#ifdef CONFIG_PM
+static int gta01_gsm_suspend(struct platform_device *pdev, pm_message_t state)
+{
+	/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
+	 * don't need to do anything here */
+
+	return 0;
+}
+
+static int gta01_gsm_resume(struct platform_device *pdev)
+{
+	/* GPIO state is saved/restored by S3C2410 core GPIO driver, so we
+	 * don't need to do anything here */
+
+	/* Make sure that the kernel console on the serial port is still
+	 * disabled. FIXME: resume ordering race with serial driver! */
+	if (s3c2410_gpio_getpin(GTA01_GPIO_MODEM_ON) && gta01_gsm.con)
+		console_stop(gta01_gsm.con);
+
+	return 0;
+}
+#else
+#define gta01_gsm_suspend	NULL
+#define gta01_gsm_resume	NULL
+#endif
+
+static struct attribute *gta01_gsm_sysfs_entries[] = {
+	&dev_attr_power_on.attr,
+	&dev_attr_reset.attr,
+	NULL,
+	NULL
+};
+
+static struct attribute_group gta01_gsm_attr_group = {
+	.name	= NULL,
+	.attrs	= gta01_gsm_sysfs_entries,
+};
+
+static int __init gta01_gsm_probe(struct platform_device *pdev)
+{
+	switch (system_rev) {
+	case GTA01v3_SYSTEM_REV:
+		gta01_gsm.gpio_ngsm_en = GTA01v3_GPIO_nGSM_EN;
+		break;
+	case GTA01v4_SYSTEM_REV:
+		gta01_gsm.gpio_ngsm_en = 0;
+		break;
+	case GTA01Bv2_SYSTEM_REV:
+	case GTA01Bv3_SYSTEM_REV:
+	case GTA01Bv4_SYSTEM_REV:
+		gta01_gsm.gpio_ngsm_en = GTA01Bv2_GPIO_nGSM_EN;
+		s3c2410_gpio_setpin(GTA01v3_GPIO_nGSM_EN, 0);
+		break;
+	default:
+		dev_warn(&pdev->dev, "Unknown GTA01 Revision 0x%x, "
+			 "some PM features not available!!!\n",
+			 system_rev);
+		break;
+	}
+
+	switch (system_rev) {
+	case GTA01v4_SYSTEM_REV:
+	case GTA01Bv2_SYSTEM_REV:
+		gta01_gsm_sysfs_entries[ARRAY_SIZE(gta01_gsm_sysfs_entries)-2] =
+							&dev_attr_download.attr;
+		break;
+	default:
+		break;
+	}
+
+	gta01_gsm.con = find_s3c24xx_console();
+	if (!gta01_gsm.con)
+		dev_warn(&pdev->dev, "cannot find S3C24xx console driver\n");
+
+	return sysfs_create_group(&pdev->dev.kobj, &gta01_gsm_attr_group);
+}
+
+static int gta01_gsm_remove(struct platform_device *pdev)
+{
+	sysfs_remove_group(&pdev->dev.kobj, &gta01_gsm_attr_group);
+
+	return 0;
+}
+
+static struct platform_driver gta01_gsm_driver = {
+	.probe		= gta01_gsm_probe,
+	.remove		= gta01_gsm_remove,
+	.suspend	= gta01_gsm_suspend,
+	.resume		= gta01_gsm_resume,
+	.driver		= {
+		.name		= "neo1973-pm-gsm",
+	},
+};
+
+static int __devinit gta01_gsm_init(void)
+{
+	return platform_driver_register(&gta01_gsm_driver);
+}
+
+static void gta01_gsm_exit(void)
+{
+	platform_driver_unregister(&gta01_gsm_driver);
+}
+
+module_init(gta01_gsm_init);
+module_exit(gta01_gsm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION("FIC Neo1973 GSM Power Management");