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19d337dff9
This patch completely rewrites the rfkill core to address the following deficiencies: * all rfkill drivers need to implement polling where necessary rather than having one central implementation * updating the rfkill state cannot be done from arbitrary contexts, forcing drivers to use schedule_work and requiring lots of code * rfkill drivers need to keep track of soft/hard blocked internally -- the core should do this * the rfkill API has many unexpected quirks, for example being asymmetric wrt. alloc/free and register/unregister * rfkill can call back into a driver from within a function the driver called -- this is prone to deadlocks and generally should be avoided * rfkill-input pointlessly is a separate module * drivers need to #ifdef rfkill functions (unless they want to depend on or select RFKILL) -- rfkill should provide inlines that do nothing if it isn't compiled in * the rfkill structure is not opaque -- drivers need to initialise it correctly (lots of sanity checking code required) -- instead force drivers to pass the right variables to rfkill_alloc() * the documentation is hard to read because it always assumes the reader is completely clueless and contains way TOO MANY CAPS * the rfkill code needlessly uses a lot of locks and atomic operations in locked sections * fix LED trigger to actually change the LED when the radio state changes -- this wasn't done before Tested-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> [thinkpad] Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
150 lines
2.9 KiB
C
150 lines
2.9 KiB
C
/*
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* Bluetooth built-in chip control
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*
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* Copyright (c) 2008 Dmitry Baryshkov
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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/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/gpio.h>
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#include <linux/delay.h>
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#include <linux/rfkill.h>
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#include <mach/tosa_bt.h>
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static void tosa_bt_on(struct tosa_bt_data *data)
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{
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gpio_set_value(data->gpio_reset, 0);
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gpio_set_value(data->gpio_pwr, 1);
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gpio_set_value(data->gpio_reset, 1);
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mdelay(20);
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gpio_set_value(data->gpio_reset, 0);
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}
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static void tosa_bt_off(struct tosa_bt_data *data)
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{
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gpio_set_value(data->gpio_reset, 1);
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mdelay(10);
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gpio_set_value(data->gpio_pwr, 0);
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gpio_set_value(data->gpio_reset, 0);
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}
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static int tosa_bt_set_block(void *data, bool blocked)
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{
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pr_info("BT_RADIO going: %s\n", blocked ? "off" : "on");
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if (!blocked) {
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pr_info("TOSA_BT: going ON\n");
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tosa_bt_on(data);
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} else {
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pr_info("TOSA_BT: going OFF\n");
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tosa_bt_off(data);
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}
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return 0;
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}
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static const struct rfkill_ops tosa_bt_rfkill_ops = {
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.set_block = tosa_bt_set_block,
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};
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static int tosa_bt_probe(struct platform_device *dev)
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{
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int rc;
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struct rfkill *rfk;
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struct tosa_bt_data *data = dev->dev.platform_data;
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rc = gpio_request(data->gpio_reset, "Bluetooth reset");
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if (rc)
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goto err_reset;
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rc = gpio_direction_output(data->gpio_reset, 0);
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if (rc)
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goto err_reset_dir;
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rc = gpio_request(data->gpio_pwr, "Bluetooth power");
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if (rc)
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goto err_pwr;
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rc = gpio_direction_output(data->gpio_pwr, 0);
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if (rc)
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goto err_pwr_dir;
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rfk = rfkill_alloc("tosa-bt", &dev->dev, RFKILL_TYPE_BLUETOOTH,
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&tosa_bt_rfkill_ops, data);
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if (!rfk) {
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rc = -ENOMEM;
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goto err_rfk_alloc;
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}
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rfkill_set_led_trigger_name(rfk, "tosa-bt");
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rc = rfkill_register(rfk);
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if (rc)
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goto err_rfkill;
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platform_set_drvdata(dev, rfk);
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return 0;
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err_rfkill:
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rfkill_destroy(rfk);
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err_rfk_alloc:
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tosa_bt_off(data);
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err_pwr_dir:
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gpio_free(data->gpio_pwr);
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err_pwr:
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err_reset_dir:
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gpio_free(data->gpio_reset);
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err_reset:
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return rc;
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}
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static int __devexit tosa_bt_remove(struct platform_device *dev)
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{
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struct tosa_bt_data *data = dev->dev.platform_data;
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struct rfkill *rfk = platform_get_drvdata(dev);
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platform_set_drvdata(dev, NULL);
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if (rfk) {
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rfkill_unregister(rfk);
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rfkill_destroy(rfk);
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}
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rfk = NULL;
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tosa_bt_off(data);
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gpio_free(data->gpio_pwr);
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gpio_free(data->gpio_reset);
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return 0;
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}
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static struct platform_driver tosa_bt_driver = {
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.probe = tosa_bt_probe,
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.remove = __devexit_p(tosa_bt_remove),
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.driver = {
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.name = "tosa-bt",
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.owner = THIS_MODULE,
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},
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};
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static int __init tosa_bt_init(void)
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{
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return platform_driver_register(&tosa_bt_driver);
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}
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static void __exit tosa_bt_exit(void)
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{
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platform_driver_unregister(&tosa_bt_driver);
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}
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module_init(tosa_bt_init);
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module_exit(tosa_bt_exit);
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