122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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* Bluetooth TI wl127x rfkill power control via GPIO
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*
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* Copyright (C) 2009 Motorola, Inc.
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* Copyright (C) 2008 Texas Instruments
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* Initial code: Pavan Savoy <pavan.savoy@gmail.com> (wl127x_power.c)
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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 as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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/gpio.h>
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#include <linux/rfkill.h>
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#include <linux/platform_device.h>
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#include <linux/wl127x-rfkill.h>
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static int wl127x_rfkill_set_power(void *data, enum rfkill_state state)
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{
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int nshutdown_gpio = (int) data;
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switch (state) {
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case RFKILL_STATE_UNBLOCKED:
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gpio_set_value(nshutdown_gpio, 1);
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break;
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case RFKILL_STATE_SOFT_BLOCKED:
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gpio_set_value(nshutdown_gpio, 0);
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break;
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default:
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printk(KERN_ERR "invalid bluetooth rfkill state %d\n", state);
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}
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return 0;
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}
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static int wl127x_rfkill_probe(struct platform_device *pdev)
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{
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int rc = 0;
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struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
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enum rfkill_state default_state = RFKILL_STATE_SOFT_BLOCKED; /* off */
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rc = gpio_request(pdata->nshutdown_gpio, "wl127x_nshutdown_gpio");
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if (unlikely(rc))
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return rc;
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rc = gpio_direction_output(pdata->nshutdown_gpio, 0);
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if (unlikely(rc))
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return rc;
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rfkill_set_default(RFKILL_TYPE_BLUETOOTH, default_state);
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wl127x_rfkill_set_power(NULL, default_state);
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pdata->rfkill = rfkill_allocate(&pdev->dev, RFKILL_TYPE_BLUETOOTH);
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if (unlikely(!pdata->rfkill))
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return -ENOMEM;
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pdata->rfkill->name = "wl127x";
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pdata->rfkill->state = default_state;
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/* userspace cannot take exclusive control */
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pdata->rfkill->user_claim_unsupported = 1;
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pdata->rfkill->user_claim = 0;
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pdata->rfkill->data = (void *) pdata->nshutdown_gpio;
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pdata->rfkill->toggle_radio = wl127x_rfkill_set_power;
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rc = rfkill_register(pdata->rfkill);
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if (unlikely(rc))
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rfkill_free(pdata->rfkill);
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return 0;
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}
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static int wl127x_rfkill_remove(struct platform_device *pdev)
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{
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struct wl127x_rfkill_platform_data *pdata = pdev->dev.platform_data;
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rfkill_unregister(pdata->rfkill);
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rfkill_free(pdata->rfkill);
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gpio_free(pdata->nshutdown_gpio);
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return 0;
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}
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static struct platform_driver wl127x_rfkill_platform_driver = {
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.probe = wl127x_rfkill_probe,
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.remove = wl127x_rfkill_remove,
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.driver = {
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.name = "wl127x-rfkill",
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.owner = THIS_MODULE,
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},
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};
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static int __init wl127x_rfkill_init(void)
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{
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return platform_driver_register(&wl127x_rfkill_platform_driver);
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}
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static void __exit wl127x_rfkill_exit(void)
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{
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platform_driver_unregister(&wl127x_rfkill_platform_driver);
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}
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module_init(wl127x_rfkill_init);
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module_exit(wl127x_rfkill_exit);
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MODULE_ALIAS("platform:wl127x");
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MODULE_DESCRIPTION("wl127x-rfkill");
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MODULE_AUTHOR("Motorola");
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MODULE_LICENSE("GPL");
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