target/linux/s3c24xx/patches-2.6.26/0087-introduce-usb-host-power-control.patch.patch

   1 From a2f39c5197fbea18417722e5c7d362eaa3bc6210 Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Fri, 25 Jul 2008 23:06:01 +0100
   4 Subject: [PATCH] introduce-usb-host-power-control.patch
   5
   6 Unless I really really missed the point, there is no support for enabling
   7 USB Host power for USB host mode.  This patch adds a /sys node for GTA02
   8 that allows control of the charge pump for 5V out on the USB mini connector
   9 It doesn't change any logical mode in the CPU, just enables (1) and disables
  10 (0) USB host power.
  11
  12 # cat /sys/devices/platform/neo1973-pm-host.0/hostmode
  13 0
  14 # echo 1 > /sys/devices/platform/neo1973-pm-host.0/hostmode
  15
  16 Signed-off-by: Andy Green <andy@openmoko.com>
  17 ---
  18  arch/arm/mach-s3c2440/mach-gta02.c      |    6 ++
  19  arch/arm/plat-s3c24xx/Makefile          |    2 +-
  20  arch/arm/plat-s3c24xx/neo1973_pm_host.c |  101 +++++++++++++++++++++++++++++++
  21  3 files changed, 108 insertions(+), 1 deletions(-)
  22  create mode 100644 arch/arm/plat-s3c24xx/neo1973_pm_host.c
  23
  24 diff --git a/arch/arm/mach-s3c2440/mach-gta02.c b/arch/arm/mach-s3c2440/mach-gta02.c
  25 index f18c8fd..5bd68a6 100644
  26 --- a/arch/arm/mach-s3c2440/mach-gta02.c
  27 +++ b/arch/arm/mach-s3c2440/mach-gta02.c
  28 @@ -1030,6 +1030,11 @@ static struct platform_device gta01_pm_gsm_dev = {
  29         .name           = "neo1973-pm-gsm",
  30  };
  31
  32 +static struct platform_device gta02_pm_usbhost_dev = {
  33 +       .name           = "neo1973-pm-host",
  34 +};
  35 +
  36 +
  37  /* USB */
  38  static struct s3c2410_hcd_info gta02_usb_info = {
  39         .port[0]        = {
  40 @@ -1287,6 +1292,7 @@ static void __init gta02_machine_init(void)
  41         platform_device_register(&s3c_device_spi_acc);
  42         platform_device_register(&gta01_button_dev);
  43         platform_device_register(&gta01_pm_gsm_dev);
  44 +       platform_device_register(&gta02_pm_usbhost_dev);
  45
  46         mangle_pmu_pdata_by_system_rev();
  47         platform_device_register(&gta02_pmu_dev);
  48 diff --git a/arch/arm/plat-s3c24xx/Makefile b/arch/arm/plat-s3c24xx/Makefile
  49 index 6f43aca..d58265f 100644
  50 --- a/arch/arm/plat-s3c24xx/Makefile
  51 +++ b/arch/arm/plat-s3c24xx/Makefile
  52 @@ -29,4 +29,4 @@ obj-$(CONFIG_PM)              += pm.o
  53  obj-$(CONFIG_PM)               += sleep.o
  54  obj-$(CONFIG_S3C2410_DMA)      += dma.o
  55  obj-$(CONFIG_MACH_SMDK)                += common-smdk.o
  56 -obj-$(CONFIG_MACH_NEO1973)     += neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
  57 +obj-$(CONFIG_MACH_NEO1973)     += neo1973_pm_host.o neo1973_pm_gsm.o neo1973_pm_gps.o neo1973_pm_bt.o
  58 diff --git a/arch/arm/plat-s3c24xx/neo1973_pm_host.c b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
  59 new file mode 100644
  60 index 0000000..4eae341
  61 --- /dev/null
  62 +++ b/arch/arm/plat-s3c24xx/neo1973_pm_host.c
  63 @@ -0,0 +1,101 @@
  64 +/*
  65 + * Bluetooth PM code for the FIC Neo1973 GSM Phone
  66 + *
  67 + * (C) 2007 by OpenMoko Inc.
  68 + * Author: Harald Welte <laforge@openmoko.org>
  69 + * All rights reserved.
  70 + *
  71 + * This program is free software; you can redistribute it and/or modify
  72 + * it under the terms of the GNU General Public License version 2 as
  73 + * published by the Free Software Foundation
  74 + *
  75 + */
  76 +
  77 +#include <linux/module.h>
  78 +#include <linux/init.h>
  79 +#include <linux/kernel.h>
  80 +#include <linux/platform_device.h>
  81 +
  82 +#include <asm/hardware.h>
  83 +#include <asm/mach-types.h>
  84 +
  85 +#ifdef CONFIG_MACH_NEO1973_GTA02
  86 +#include <asm/arch/gta02.h>
  87 +#include <linux/pcf50633.h>
  88 +
  89 +static ssize_t pm_host_read(struct device *dev, struct device_attribute *attr,
  90 +                           char *buf)
  91 +{
  92 +       return sprintf(buf, "%d\n",
  93 +                      pcf50633_gpio_get(pcf50633_global, PCF50633_GPO));
  94 +}
  95 +
  96 +static ssize_t pm_host_write(struct device *dev, struct device_attribute *attr,
  97 +                            const char *buf, size_t count)
  98 +{
  99 +       unsigned long on = simple_strtoul(buf, NULL, 10);
 100 +
 101 +       pcf50633_gpio_set(pcf50633_global, PCF50633_GPO, on);
 102 +
 103 +       return count;
 104 +}
 105 +
 106 +static DEVICE_ATTR(hostmode, 0644, pm_host_read, pm_host_write);
 107 +
 108 +static struct attribute *neo1973_pm_host_sysfs_entries[] = {
 109 +       &dev_attr_hostmode.attr,
 110 +       NULL
 111 +};
 112 +
 113 +static struct attribute_group neo1973_pm_host_attr_group = {
 114 +       .name   = NULL,
 115 +       .attrs  = neo1973_pm_host_sysfs_entries,
 116 +};
 117 +
 118 +static int __init neo1973_pm_host_probe(struct platform_device *pdev)
 119 +{
 120 +       dev_info(&pdev->dev, "starting\n");
 121 +
 122 +       switch (machine_arch_type) {
 123 +#ifdef CONFIG_MACH_NEO1973_GTA01
 124 +       case MACH_TYPE_NEO1973_GTA01:
 125 +               return -EINVAL;
 126 +#endif /* CONFIG_MACH_NEO1973_GTA01 */
 127 +       default:
 128 +               break;
 129 +       }
 130 +
 131 +       return sysfs_create_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
 132 +}
 133 +
 134 +static int neo1973_pm_host_remove(struct platform_device *pdev)
 135 +{
 136 +       sysfs_remove_group(&pdev->dev.kobj, &neo1973_pm_host_attr_group);
 137 +       return 0;
 138 +}
 139 +
 140 +static struct platform_driver neo1973_pm_host_driver = {
 141 +       .probe          = neo1973_pm_host_probe,
 142 +       .remove         = neo1973_pm_host_remove,
 143 +       .driver         = {
 144 +               .name           = "neo1973-pm-host",
 145 +       },
 146 +};
 147 +
 148 +static int __devinit neo1973_pm_host_init(void)
 149 +{
 150 +       return platform_driver_register(&neo1973_pm_host_driver);
 151 +}
 152 +
 153 +static void neo1973_pm_host_exit(void)
 154 +{
 155 +       platform_driver_unregister(&neo1973_pm_host_driver);
 156 +}
 157 +
 158 +module_init(neo1973_pm_host_init);
 159 +module_exit(neo1973_pm_host_exit);
 160 +
 161 +MODULE_LICENSE("GPL");
 162 +MODULE_AUTHOR("Andy Green <andy@openmoko.com>");
 163 +MODULE_DESCRIPTION("Neo1973 USB Host Power Management");
 164 +#endif
 165 --
 166 1.5.6.3
 167