projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 260586d2 DD |
1 | /* |
| 2 | * Support for rfkill through the OLPC XO-1 laptop embedded controller | |
| 3 | * | |
| 4 | * Copyright (C) 2010 One Laptop per Child | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License as published by | |
| 8 | * the Free Software Foundation; either version 2 of the License, or | |
| 9 | * (at your option) any later version. | |
| 10 | */ | |
| 11 | ||
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/platform_device.h> | |
| 14 | #include <linux/rfkill.h> | |
| 15 | ||
| 16 | #include <asm/olpc.h> | |
| 17 | ||
| bc7ab495 DD |
18 | static bool card_blocked; |
| 19 | ||
| 260586d2 DD |
20 | static int rfkill_set_block(void *data, bool blocked) |
| 21 | { | |
| 22 | unsigned char cmd; | |
| bc7ab495 DD |
23 | int r; |
| 24 | ||
| 25 | if (blocked == card_blocked) | |
| 26 | return 0; | |
| 27 | ||
| 260586d2 DD |
28 | if (blocked) |
| 29 | cmd = EC_WLAN_ENTER_RESET; | |
| 30 | else | |
| 31 | cmd = EC_WLAN_LEAVE_RESET; | |
| 32 | ||
| bc7ab495 DD |
33 | r = olpc_ec_cmd(cmd, NULL, 0, NULL, 0); |
| 34 | if (r == 0) | |
| 35 | card_blocked = blocked; | |
| 36 | ||
| 37 | return r; | |
| 260586d2 DD |
38 | } |
| 39 | ||
| 40 | static const struct rfkill_ops rfkill_ops = { | |
| 41 | .set_block = rfkill_set_block, | |
| 42 | }; | |
| 43 | ||
| 44 | static int __devinit xo1_rfkill_probe(struct platform_device *pdev) | |
| 45 | { | |
| 46 | struct rfkill *rfk; | |
| 47 | int r; | |
| 48 | ||
| 49 | rfk = rfkill_alloc(pdev->name, &pdev->dev, RFKILL_TYPE_WLAN, | |
| 50 | &rfkill_ops, NULL); | |
| 51 | if (!rfk) | |
| 52 | return -ENOMEM; | |
| 53 | ||
| 54 | r = rfkill_register(rfk); | |
| 55 | if (r) { | |
| 56 | rfkill_destroy(rfk); | |
| 57 | return r; | |
| 58 | } | |
| 59 | ||
| 60 | platform_set_drvdata(pdev, rfk); | |
| 61 | return 0; | |
| 62 | } | |
| 63 | ||
| 64 | static int __devexit xo1_rfkill_remove(struct platform_device *pdev) | |
| 65 | { | |
| 66 | struct rfkill *rfk = platform_get_drvdata(pdev); | |
| 67 | rfkill_unregister(rfk); | |
| 68 | rfkill_destroy(rfk); | |
| 69 | return 0; | |
| 70 | } | |
| 71 | ||
| 72 | static struct platform_driver xo1_rfkill_driver = { | |
| 73 | .driver = { | |
| 74 | .name = "xo1-rfkill", | |
| 75 | .owner = THIS_MODULE, | |
| 76 | }, | |
| 77 | .probe = xo1_rfkill_probe, | |
| 78 | .remove = __devexit_p(xo1_rfkill_remove), | |
| 79 | }; | |
| 80 | ||
| 73d99a22 | 81 | module_platform_driver(xo1_rfkill_driver); |
| 260586d2 DD |
82 | |
| 83 | MODULE_AUTHOR("Daniel Drake <dsd@laptop.org>"); | |
| 84 | MODULE_LICENSE("GPL"); | |
| 85 | MODULE_ALIAS("platform:xo1-rfkill"); |