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[ARM] 5150/1: Tosa: support built-in bluetooth power-up
The driver is pretty much generic and will be later shared with a few other devices, like hx4700 ipaq. Signed-off-by: Dmitry Baryshkov <dbaryshkov@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Dmitry Baryshkov
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Russell King
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Jul 7, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| /* | ||
| * Bluetooth built-in chip control | ||
| * | ||
| * Copyright (c) 2008 Dmitry Baryshkov | ||
| * | ||
| * 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/kernel.h> | ||
| #include <linux/module.h> | ||
| #include <linux/platform_device.h> | ||
| #include <linux/gpio.h> | ||
| #include <linux/delay.h> | ||
| #include <linux/rfkill.h> | ||
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| #include <asm/arch/tosa_bt.h> | ||
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| static void tosa_bt_on(struct tosa_bt_data *data) | ||
| { | ||
| gpio_set_value(data->gpio_reset, 0); | ||
| gpio_set_value(data->gpio_pwr, 1); | ||
| gpio_set_value(data->gpio_reset, 1); | ||
| mdelay(20); | ||
| gpio_set_value(data->gpio_reset, 0); | ||
| } | ||
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| static void tosa_bt_off(struct tosa_bt_data *data) | ||
| { | ||
| gpio_set_value(data->gpio_reset, 1); | ||
| mdelay(10); | ||
| gpio_set_value(data->gpio_pwr, 0); | ||
| gpio_set_value(data->gpio_reset, 0); | ||
| } | ||
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| static int tosa_bt_toggle_radio(void *data, enum rfkill_state state) | ||
| { | ||
| pr_info("BT_RADIO going: %s\n", | ||
| state == RFKILL_STATE_ON ? "on" : "off"); | ||
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| if (state == RFKILL_STATE_ON) { | ||
| pr_info("TOSA_BT: going ON\n"); | ||
| tosa_bt_on(data); | ||
| } else { | ||
| pr_info("TOSA_BT: going OFF\n"); | ||
| tosa_bt_off(data); | ||
| } | ||
| return 0; | ||
| } | ||
|
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| static int tosa_bt_probe(struct platform_device *dev) | ||
| { | ||
| int rc; | ||
| 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"); | ||
| if (rc) | ||
| goto err_reset; | ||
| rc = gpio_direction_output(data->gpio_reset, 0); | ||
| if (rc) | ||
| goto err_reset_dir; | ||
| rc = gpio_request(data->gpio_pwr, "Bluetooth power"); | ||
| if (rc) | ||
| goto err_pwr; | ||
| rc = gpio_direction_output(data->gpio_pwr, 0); | ||
| if (rc) | ||
| goto err_pwr_dir; | ||
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| rfk = rfkill_allocate(&dev->dev, RFKILL_TYPE_BLUETOOTH); | ||
| if (!rfk) { | ||
| rc = -ENOMEM; | ||
| goto err_rfk_alloc; | ||
| } | ||
|
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| rfk->name = "tosa-bt"; | ||
| rfk->toggle_radio = tosa_bt_toggle_radio; | ||
| rfk->data = data; | ||
| #ifdef CONFIG_RFKILL_LEDS | ||
| rfk->led_trigger.name = "tosa-bt"; | ||
| #endif | ||
|
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| rc = rfkill_register(rfk); | ||
| if (rc) | ||
| goto err_rfkill; | ||
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| platform_set_drvdata(dev, rfk); | ||
|
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| return 0; | ||
|
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| err_rfkill: | ||
| if (rfk) | ||
| rfkill_free(rfk); | ||
| rfk = NULL; | ||
| err_rfk_alloc: | ||
| tosa_bt_off(data); | ||
| err_pwr_dir: | ||
| gpio_free(data->gpio_pwr); | ||
| err_pwr: | ||
| err_reset_dir: | ||
| gpio_free(data->gpio_reset); | ||
| err_reset: | ||
| return rc; | ||
| } | ||
|
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| static int __devexit tosa_bt_remove(struct platform_device *dev) | ||
| { | ||
| struct tosa_bt_data *data = dev->dev.platform_data; | ||
| struct rfkill *rfk = platform_get_drvdata(dev); | ||
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| platform_set_drvdata(dev, NULL); | ||
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| if (rfk) | ||
| rfkill_unregister(rfk); | ||
| rfk = NULL; | ||
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| tosa_bt_off(data); | ||
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| gpio_free(data->gpio_pwr); | ||
| gpio_free(data->gpio_reset); | ||
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| return 0; | ||
| } | ||
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| static struct platform_driver tosa_bt_driver = { | ||
| .probe = tosa_bt_probe, | ||
| .remove = __devexit_p(tosa_bt_remove), | ||
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| .driver = { | ||
| .name = "tosa-bt", | ||
| .owner = THIS_MODULE, | ||
| }, | ||
| }; | ||
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| static int __init tosa_bt_init(void) | ||
| { | ||
| return platform_driver_register(&tosa_bt_driver); | ||
| } | ||
|
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| static void __exit tosa_bt_exit(void) | ||
| { | ||
| platform_driver_unregister(&tosa_bt_driver); | ||
| } | ||
|
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| module_init(tosa_bt_init); | ||
| module_exit(tosa_bt_exit); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| /* | ||
| * Tosa bluetooth built-in chip control. | ||
| * | ||
| * Later it may be shared with some other platforms. | ||
| * | ||
| * Copyright (c) 2008 Dmitry Baryshkov | ||
| * | ||
| * 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. | ||
| * | ||
| */ | ||
| #ifndef TOSA_BT_H | ||
| #define TOSA_BT_H | ||
|
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| struct tosa_bt_data { | ||
| int gpio_pwr; | ||
| int gpio_reset; | ||
| }; | ||
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| #endif | ||
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