167 lines
5 KiB
Diff
Executable file
167 lines
5 KiB
Diff
Executable file
From a2f39c5197fbea18417722e5c7d362eaa3bc6210 Mon Sep 17 00:00:00 2001
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From: Andy Green <andy@openmoko.com>
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Date: Fri, 25 Jul 2008 23:06:01 +0100
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Subject: [PATCH] introduce-usb-host-power-control.patch
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Unless I really really missed the point, there is no support for enabling
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USB Host power for USB host mode. This patch adds a /sys node for GTA02
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that allows control of the charge pump for 5V out on the USB mini connector
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It doesn't change any logical mode in the CPU, just enables (1) and disables
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(0) USB host power.
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# cat /sys/devices/platform/neo1973-pm-host.0/hostmode
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0
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# echo 1 > /sys/devices/platform/neo1973-pm-host.0/hostmode
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Signed-off-by: Andy Green <andy@openmoko.com>
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---
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arch/arm/mach-s3c2440/mach-gta02.c | 6 ++
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arch/arm/plat-s3c24xx/Makefile | 2 +-
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arch/arm/plat-s3c24xx/neo1973_pm_host.c | 101 +++++++++++++++++++++++++++++++
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3 files changed, 108 insertions(+), 1 deletions(-)
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create mode 100644 arch/arm/plat-s3c24xx/neo1973_pm_host.c
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diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
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index f18c8fd..5bd68a6 100644
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--- a/arch/arm/mach-s3c2440/mach-gta02.c
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+++ b/arch/arm/mach-s3c2440/mach-gta02.c
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@@ -1030,6 +1030,11 @@ static struct platform_device gta01_pm_gsm_dev = {
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.name = "neo1973-pm-gsm",
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};
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+static struct platform_device gta02_pm_usbhost_dev = {
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+ .name = "neo1973-pm-host",
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+};
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+
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+
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/* USB */
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static struct s3c2410_hcd_info gta02_usb_info = {
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.port[0] = {
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@@ -1287,6 +1292,7 @@ static void __init gta02_machine_init(void)
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platform_device_register(&s3c_device_spi_acc);
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platform_device_register(>a01_button_dev);
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platform_device_register(>a01_pm_gsm_dev);
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+ platform_device_register(>a02_pm_usbhost_dev);
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mangle_pmu_pdata_by_system_rev();
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platform_device_register(>a02_pmu_dev);
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diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
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index 6f43aca..d58265f 100644
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--- a/arch/arm/plat-s3c24xx/Makefile
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+++ b/arch/arm/plat-s3c24xx/Makefile
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@@ -29,4 +29,4 @@ obj-$(CONFIG_PM) += pm.o
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obj-$(CONFIG_PM) += sleep.o
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obj-$(CONFIG_S3C2410_DMA) += dma.o
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obj-$(CONFIG_MACH_SMDK) += common-smdk.o
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-obj-$(CONFIG_MACH_NEO1973) += neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
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+obj-$(CONFIG_MACH_NEO1973) += neo1973_pm_host.o neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
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diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_host.c b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
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new file mode 100644
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index 0000000..4eae341
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--- /dev/null
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+++ b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
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@@ -0,0 +1,101 @@
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+/*
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+ * Bluetooth PM code for the FIC Neo1973 GSM Phone
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+ *
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+ * (C) 2007 by OpenMoko Inc.
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+ * Author: Harald Welte <laforge@openmoko.org>
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+ * All rights reserved.
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation
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+ *
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+ */
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+
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+#include <linux/module.h>
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+#include <linux/init.h>
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+#include <linux/kernel.h>
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+#include <linux/platform_device.h>
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+
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+#include <asm/hardware.h>
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+#include <asm/mach-types.h>
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+
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+#ifdef CONFIG_MACH_NEO1973_GTA02
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+#include <asm/arch/gta02.h>
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+#include <linux/pcf50633.h>
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+
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+static ssize_t pm_host_read(struct device *dev, struct device_attribute *attr,
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+ char *buf)
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+{
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+ return sprintf(buf, "%d\n",
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+ pcf50633_gpio_get(pcf50633_global, PCF50633_GPO));
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+}
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+
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+static ssize_t pm_host_write(struct device *dev, struct device_attribute *attr,
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+ const char *buf, size_t count)
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+{
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+ unsigned long on = simple_strtoul(buf, NULL, 10);
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+
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+ pcf50633_gpio_set(pcf50633_global, PCF50633_GPO, on);
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+
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+ return count;
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+}
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+
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+static DEVICE_ATTR(hostmode, 0644, pm_host_read, pm_host_write);
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+
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+static struct attribute *neo1973_pm_host_sysfs_entries[] = {
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+ &dev_attr_hostmode.attr,
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+ NULL
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+};
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+
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+static struct attribute_group neo1973_pm_host_attr_group = {
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+ .name = NULL,
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+ .attrs = neo1973_pm_host_sysfs_entries,
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+};
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+
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+static int __init neo1973_pm_host_probe(struct platform_device *pdev)
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+{
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+ dev_info(&pdev->dev, "starting\n");
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+
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+ switch (machine_arch_type) {
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+#ifdef CONFIG_MACH_NEO1973_GTA01
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+ case MACH_TYPE_NEO1973_GTA01:
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+ return -EINVAL;
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+#endif /* CONFIG_MACH_NEO1973_GTA01 */
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+ default:
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+ break;
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+ }
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+
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+ return sysfs_create_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
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+}
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+
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+static int neo1973_pm_host_remove(struct platform_device *pdev)
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+{
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+ sysfs_remove_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
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+ return 0;
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+}
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+
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+static struct platform_driver neo1973_pm_host_driver = {
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+ .probe = neo1973_pm_host_probe,
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+ .remove = neo1973_pm_host_remove,
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+ .driver = {
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+ .name = "neo1973-pm-host",
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+ },
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+};
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+
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+static int __devinit neo1973_pm_host_init(void)
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+{
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+ return platform_driver_register(&neo1973_pm_host_driver);
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+}
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+
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+static void neo1973_pm_host_exit(void)
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+{
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+ platform_driver_unregister(&neo1973_pm_host_driver);
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+}
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+
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+module_init(neo1973_pm_host_init);
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+module_exit(neo1973_pm_host_exit);
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+
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+MODULE_LICENSE("GPL");
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+MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
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+MODULE_DESCRIPTION("Neo1973 USB Host Power Management");
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+#endif
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--
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1.5.6.3
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