introduce-usb-host-power-control.patch

Unless I really really missed the point, there is no support for enabling
USB Host power for USB host mode.  This patch adds a /sys node for GTA02
that allows control of the charge pump for 5V out on the USB mini connector
It doesn't change any logical mode in the CPU, just enables (1) and disables
(0) USB host power.

# cat /sys/devices/platform/neo1973-pm-host.0/hostmode
0
# echo 1 > /sys/devices/platform/neo1973-pm-host.0/hostmode

Signed-off-by: Andy Green <andy@openmoko.com>

3 files changed, 108 insertions, 1 deletions

diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
index f18c8fd7d97..5bd68a69f49 100644
--- a/arch/arm/mach-s3c2440/mach-gta02.c
+++ b/arch/arm/mach-s3c2440/mach-gta02.c
@@ -1030,6 +1030,11 @@ static struct platform_device gta01_pm_gsm_dev = {
 	.name		= "neo1973-pm-gsm",
 };
 
+static struct platform_device gta02_pm_usbhost_dev = {
+	.name		= "neo1973-pm-host",
+};
+
+
 /* USB */
 static struct s3c2410_hcd_info gta02_usb_info = {
 	.port[0]	= {
@@ -1287,6 +1292,7 @@ static void __init gta02_machine_init(void)
 	platform_device_register(&s3c_device_spi_acc);
 	platform_device_register(&gta01_button_dev);
 	platform_device_register(&gta01_pm_gsm_dev);
+	platform_device_register(&gta02_pm_usbhost_dev);
 
 	mangle_pmu_pdata_by_system_rev();
 	platform_device_register(&gta02_pmu_dev);
diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
index b3bd4238f24..096dd624cfc 100644
--- a/arch/arm/plat-s3c24xx/Makefile
+++ b/arch/arm/plat-s3c24xx/Makefile
@@ -43,4 +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
+obj-$(CONFIG_MACH_NEO1973)	+= neo1973_pm_host.o neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_host.c b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
new file mode 100644
index 00000000000..4eae3419968
--- /dev/null
+++ b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
@@ -0,0 +1,101 @@
+/*
+ * 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 <asm/hardware.h>
+#include <asm/mach-types.h>
+
+#ifdef CONFIG_MACH_NEO1973_GTA02
+#include <asm/arch/gta02.h>
+#include <linux/pcf50633.h>
+
+static ssize_t pm_host_read(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	return sprintf(buf, "%d\n",
+		       pcf50633_gpio_get(pcf50633_global, PCF50633_GPO));
+}
+
+static ssize_t pm_host_write(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	unsigned long on = simple_strtoul(buf, NULL, 10);
+
+	pcf50633_gpio_set(pcf50633_global, PCF50633_GPO, on);
+
+	return count;
+}
+
+static DEVICE_ATTR(hostmode, 0644, pm_host_read, pm_host_write);
+
+static struct attribute *neo1973_pm_host_sysfs_entries[] = {
+	&dev_attr_hostmode.attr,
+	NULL
+};
+
+static struct attribute_group neo1973_pm_host_attr_group = {
+	.name	= NULL,
+	.attrs	= neo1973_pm_host_sysfs_entries,
+};
+
+static int __init neo1973_pm_host_probe(struct platform_device *pdev)
+{
+	dev_info(&pdev->dev, "starting\n");
+
+	switch (machine_arch_type) {
+#ifdef CONFIG_MACH_NEO1973_GTA01
+	case MACH_TYPE_NEO1973_GTA01:
+		return -EINVAL;
+#endif /* CONFIG_MACH_NEO1973_GTA01 */
+	default:
+		break;
+	}
+
+	return sysfs_create_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
+}
+
+static int neo1973_pm_host_remove(struct platform_device *pdev)
+{
+	sysfs_remove_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
+	return 0;
+}
+
+static struct platform_driver neo1973_pm_host_driver = {
+	.probe		= neo1973_pm_host_probe,
+	.remove		= neo1973_pm_host_remove,
+	.driver		= {
+		.name		= "neo1973-pm-host",
+	},
+};
+
+static int __devinit neo1973_pm_host_init(void)
+{
+	return platform_driver_register(&neo1973_pm_host_driver);
+}
+
+static void neo1973_pm_host_exit(void)
+{
+	platform_driver_unregister(&neo1973_pm_host_driver);
+}
+
+module_init(neo1973_pm_host_init);
+module_exit(neo1973_pm_host_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
+MODULE_DESCRIPTION("Neo1973 USB Host Power Management");
+#endif