--- /dev/null
+/*
+ * Bluetooth PM code for the Openmoko Freerunner 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/rfkill.h>
+#include <linux/err.h>
+
+#include <mach/hardware.h>
+#include <asm/mach-types.h>
+#include <linux/gta02-shadow.h>
+
+#include <mach/gta02.h>
+#include <linux/mfd/pcf50633/gpio.h>
+
+#include <linux/regulator/consumer.h>
+
+#define DRVMSG "Openmoko Freerunner Bluetooth Power Management"
+
+struct gta02_pm_bt_data {
+ struct regulator *regulator;
+ struct rfkill *rfkill;
+ int pre_resume_state;
+};
+
+static ssize_t bt_read(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ int ret = 0;
+ if (!strcmp(attr->attr.name, "power_on")) {
+ if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN))
+ ret = 1;
+ } else if (!strcmp(attr->attr.name, "reset")) {
+ if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN) == 0)
+ ret = 1;
+ }
+
+ if (!ret) {
+ return strlcpy(buf, "0\n", 3);
+ } else {
+ return strlcpy(buf, "1\n", 3);
+ }
+}
+
+static void __gta02_pm_bt_toggle_radio(struct device *dev, unsigned int on)
+{
+ struct gta02_pm_bt_data *bt_data = dev_get_drvdata(dev);
+
+ dev_info(dev, "__gta02_pm_bt_toggle_radio %d\n", on);
+
+ bt_data = dev_get_drvdata(dev);
+
+ gta02_gpb_setpin(GTA02_GPIO_BT_EN, !on);
+
+ if (on) {
+ if (!regulator_is_enabled(bt_data->regulator))
+ regulator_enable(bt_data->regulator);
+ } else {
+ if (regulator_is_enabled(bt_data->regulator))
+ regulator_disable(bt_data->regulator);
+ }
+
+ gta02_gpb_setpin(GTA02_GPIO_BT_EN, on);
+}
+
+
+static int bt_rfkill_toggle_radio(void *data, enum rfkill_state state)
+{
+ struct device *dev = data;
+ unsigned long on = (state == RFKILL_STATE_ON);
+
+ __gta02_pm_bt_toggle_radio(dev, on);
+
+ return 0;
+}
+
+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);
+ struct gta02_pm_bt_data *bt_data = dev_get_drvdata(dev);
+
+ if (!strcmp(attr->attr.name, "power_on")) {
+ enum rfkill_state state = on ? RFKILL_STATE_ON : RFKILL_STATE_OFF;
+ bt_rfkill_toggle_radio(dev, state);
+ bt_data->rfkill->state = state;
+
+ __gta02_pm_bt_toggle_radio(dev, on);
+ } else if (!strcmp(attr->attr.name, "reset")) {
+ /* reset is low-active, so we need to invert */
+ gta02_gpb_setpin(GTA02_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 gta02_bt_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
+
+ dev_dbg(&pdev->dev, DRVMSG ": suspending\n");
+
+ bt_data->pre_resume_state = s3c2410_gpio_getpin(GTA02_GPIO_BT_EN);
+ __gta02_pm_bt_toggle_radio(&pdev->dev, 0);
+
+ return 0;
+}
+
+static int gta02_bt_resume(struct platform_device *pdev)
+{
+ struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
+ dev_dbg(&pdev->dev, DRVMSG ": resuming\n");
+
+ __gta02_pm_bt_toggle_radio(&pdev->dev, bt_data->pre_resume_state);
+ return 0;
+}
+#else
+#define gta02_bt_suspend NULL
+#define gta02_bt_resume NULL
+#endif
+
+static struct attribute *gta02_bt_sysfs_entries[] = {
+ &dev_attr_power_on.attr,
+ &dev_attr_reset.attr,
+ NULL
+};
+
+static struct attribute_group gta02_bt_attr_group = {
+ .name = NULL,
+ .attrs = gta02_bt_sysfs_entries,
+};
+
+static int __init gta02_bt_probe(struct platform_device *pdev)
+{
+ struct rfkill *rfkill;
+ struct regulator *regulator;
+ struct gta02_pm_bt_data *bt_data;
+ int ret;
+
+ dev_info(&pdev->dev, DRVMSG ": starting\n");
+
+ bt_data = kzalloc(sizeof(*bt_data), GFP_KERNEL);
+ dev_set_drvdata(&pdev->dev, bt_data);
+
+ regulator = regulator_get(&pdev->dev, "BT_3V2");
+ if (IS_ERR(regulator))
+ return -ENODEV;
+
+ bt_data->regulator = regulator;
+
+ /* this tests the true physical state of the regulator... */
+ if (regulator_is_enabled(regulator)) {
+ /*
+ * but these only operate on the logical state of the
+ * regulator... so we need to logicaly "adopt" it on
+ * to turn it off
+ */
+ regulator_enable(regulator);
+ regulator_disable(regulator);
+ }
+
+ /* we pull reset to low to make sure that the chip doesn't
+ * drain power through the reset line */
+ gta02_gpb_setpin(GTA02_GPIO_BT_EN, 0);
+
+ rfkill = rfkill_allocate(&pdev->dev, RFKILL_TYPE_BLUETOOTH);
+
+ rfkill->name = pdev->name;
+ rfkill->data = &pdev->dev;
+ rfkill->state = RFKILL_STATE_OFF;
+ rfkill->toggle_radio = bt_rfkill_toggle_radio;
+
+ ret = rfkill_register(rfkill);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to register rfkill\n");
+ return ret;
+ }
+
+ bt_data->rfkill = rfkill;
+
+ return sysfs_create_group(&pdev->dev.kobj, >a02_bt_attr_group);
+}
+
+static int gta02_bt_remove(struct platform_device *pdev)
+{
+ struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
+ struct regulator *regulator;
+
+ sysfs_remove_group(&pdev->dev.kobj, >a02_bt_attr_group);
+
+ if (bt_data->rfkill) {
+ rfkill_unregister(bt_data->rfkill);
+ rfkill_free(bt_data->rfkill);
+ }
+
+ if (!bt_data || !bt_data->regulator)
+ return 0;
+
+ regulator = bt_data->regulator;
+
+ /* Make sure regulator is disabled before calling regulator_put */
+ if (regulator_is_enabled(regulator))
+ regulator_disable(regulator);
+
+ regulator_put(regulator);
+
+ kfree(bt_data);
+
+ return 0;
+}
+
+static struct platform_driver gta02_bt_driver = {
+ .probe = gta02_bt_probe,
+ .remove = gta02_bt_remove,
+ .suspend = gta02_bt_suspend,
+ .resume = gta02_bt_resume,
+ .driver = {
+ .name = "gta02-pm-bt",
+ },
+};
+
+static int __devinit gta02_bt_init(void)
+{
+ return platform_driver_register(>a02_bt_driver);
+}
+
+static void gta02_bt_exit(void)
+{
+ platform_driver_unregister(>a02_bt_driver);
+}
+
+module_init(gta02_bt_init);
+module_exit(gta02_bt_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_DESCRIPTION(DRVMSG);
projects / openwrt / svn-archive / archive.git / blobdiff