mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
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d6694fb05e
I fail really to see why this would be necessary here. So get rid of it and see if anything breaks... git-svn-id: svn://svn.openwrt.org/openwrt/trunk@17052 3c298f89-4303-0410-b956-a3cf2f4a3e73
253 lines
5.9 KiB
C
253 lines
5.9 KiB
C
/*
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* Bluetooth PM code for the Openmoko Freerunner 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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#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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#include <linux/rfkill.h>
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#include <linux/err.h>
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#include <mach/hardware.h>
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#include <asm/mach-types.h>
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#include <mach/gta02.h>
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#include <linux/mfd/pcf50633/gpio.h>
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#include <linux/regulator/consumer.h>
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#define DRVMSG "Openmoko Freerunner Bluetooth Power Management"
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struct gta02_pm_bt_data {
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struct regulator *regulator;
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struct rfkill *rfkill;
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int pre_resume_state;
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};
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static ssize_t bt_read(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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int ret = 0;
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if (!strcmp(attr->attr.name, "power_on")) {
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if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN))
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ret = 1;
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} else if (!strcmp(attr->attr.name, "reset")) {
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if (s3c2410_gpio_getpin(GTA02_GPIO_BT_EN) == 0)
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ret = 1;
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}
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if (!ret) {
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return strlcpy(buf, "0\n", 3);
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} else {
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return strlcpy(buf, "1\n", 3);
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}
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}
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static void __gta02_pm_bt_toggle_radio(struct device *dev, unsigned int on)
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{
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struct gta02_pm_bt_data *bt_data = dev_get_drvdata(dev);
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dev_info(dev, "__gta02_pm_bt_toggle_radio %d\n", on);
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bt_data = dev_get_drvdata(dev);
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s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, !on);
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if (on) {
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if (!regulator_is_enabled(bt_data->regulator))
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regulator_enable(bt_data->regulator);
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} else {
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if (regulator_is_enabled(bt_data->regulator))
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regulator_disable(bt_data->regulator);
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}
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s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, on);
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}
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static int bt_rfkill_toggle_radio(void *data, enum rfkill_state state)
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{
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struct device *dev = data;
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unsigned long on = (state == RFKILL_STATE_ON);
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__gta02_pm_bt_toggle_radio(dev, on);
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return 0;
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}
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static ssize_t bt_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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struct gta02_pm_bt_data *bt_data = dev_get_drvdata(dev);
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if (!strcmp(attr->attr.name, "power_on")) {
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enum rfkill_state state = on ? RFKILL_STATE_ON : RFKILL_STATE_OFF;
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bt_rfkill_toggle_radio(dev, state);
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bt_data->rfkill->state = state;
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__gta02_pm_bt_toggle_radio(dev, on);
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} else if (!strcmp(attr->attr.name, "reset")) {
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/* reset is low-active, so we need to invert */
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s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, on ? 0 : 1);
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}
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return count;
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}
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static DEVICE_ATTR(power_on, 0644, bt_read, bt_write);
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static DEVICE_ATTR(reset, 0644, bt_read, bt_write);
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#ifdef CONFIG_PM
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static int gta02_bt_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
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dev_dbg(&pdev->dev, DRVMSG ": suspending\n");
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bt_data->pre_resume_state = s3c2410_gpio_getpin(GTA02_GPIO_BT_EN);
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__gta02_pm_bt_toggle_radio(&pdev->dev, 0);
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return 0;
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}
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static int gta02_bt_resume(struct platform_device *pdev)
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{
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struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
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dev_dbg(&pdev->dev, DRVMSG ": resuming\n");
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__gta02_pm_bt_toggle_radio(&pdev->dev, bt_data->pre_resume_state);
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return 0;
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}
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#else
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#define gta02_bt_suspend NULL
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#define gta02_bt_resume NULL
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#endif
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static struct attribute *gta02_bt_sysfs_entries[] = {
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&dev_attr_power_on.attr,
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&dev_attr_reset.attr,
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NULL
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};
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static struct attribute_group gta02_bt_attr_group = {
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.name = NULL,
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.attrs = gta02_bt_sysfs_entries,
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};
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static int __init gta02_bt_probe(struct platform_device *pdev)
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{
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struct rfkill *rfkill;
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struct regulator *regulator;
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struct gta02_pm_bt_data *bt_data;
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int ret;
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dev_info(&pdev->dev, DRVMSG ": starting\n");
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bt_data = kzalloc(sizeof(*bt_data), GFP_KERNEL);
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dev_set_drvdata(&pdev->dev, bt_data);
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regulator = regulator_get(&pdev->dev, "BT_3V2");
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if (IS_ERR(regulator))
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return -ENODEV;
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bt_data->regulator = regulator;
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/* this tests the true physical state of the regulator... */
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if (regulator_is_enabled(regulator)) {
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/*
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* but these only operate on the logical state of the
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* regulator... so we need to logicaly "adopt" it on
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* to turn it off
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*/
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regulator_enable(regulator);
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regulator_disable(regulator);
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}
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/* we pull reset to low to make sure that the chip doesn't
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* drain power through the reset line */
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s3c2410_gpio_setpin(GTA02_GPIO_BT_EN, 0);
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rfkill = rfkill_allocate(&pdev->dev, RFKILL_TYPE_BLUETOOTH);
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rfkill->name = pdev->name;
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rfkill->data = &pdev->dev;
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rfkill->state = RFKILL_STATE_OFF;
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rfkill->toggle_radio = bt_rfkill_toggle_radio;
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ret = rfkill_register(rfkill);
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if (ret) {
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dev_err(&pdev->dev, "Failed to register rfkill\n");
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return ret;
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}
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bt_data->rfkill = rfkill;
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return sysfs_create_group(&pdev->dev.kobj, >a02_bt_attr_group);
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}
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static int gta02_bt_remove(struct platform_device *pdev)
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{
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struct gta02_pm_bt_data *bt_data = dev_get_drvdata(&pdev->dev);
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struct regulator *regulator;
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sysfs_remove_group(&pdev->dev.kobj, >a02_bt_attr_group);
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if (bt_data->rfkill) {
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rfkill_unregister(bt_data->rfkill);
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rfkill_free(bt_data->rfkill);
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}
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if (!bt_data || !bt_data->regulator)
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return 0;
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regulator = bt_data->regulator;
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/* Make sure regulator is disabled before calling regulator_put */
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if (regulator_is_enabled(regulator))
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regulator_disable(regulator);
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regulator_put(regulator);
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kfree(bt_data);
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return 0;
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}
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static struct platform_driver gta02_bt_driver = {
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.probe = gta02_bt_probe,
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.remove = gta02_bt_remove,
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.suspend = gta02_bt_suspend,
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.resume = gta02_bt_resume,
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.driver = {
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.name = "gta02-pm-bt",
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},
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};
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static int __devinit gta02_bt_init(void)
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{
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return platform_driver_register(>a02_bt_driver);
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}
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static void gta02_bt_exit(void)
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{
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platform_driver_unregister(>a02_bt_driver);
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}
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module_init(gta02_bt_init);
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module_exit(gta02_bt_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
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MODULE_DESCRIPTION(DRVMSG);
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