LXR linux/drivers/platform/x86/amilo-rfkill.c

   1/*
   2 * Support for rfkill on some Fujitsu-Siemens Amilo laptops.
   3 * Copyright 2011 Ben Hutchings.
   4 *
   5 * Based in part on the fsam7440 driver, which is:
   6 * Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata.
   7 * and on the fsaa1655g driver, which is:
   8 * Copyright 2006 Martin Večeřa.
   9 *
  10 * This program is free software; you can redistribute it and/or modify
  11 * it under the terms of the GNU General Public License as published by
  12 * the Free Software Foundation; either version 2 of the License, or
  13 * (at your option) any later version.
  14 */
  15
  16#include <linux/module.h>
  17#include <linux/dmi.h>
  18#include <linux/i8042.h>
  19#include <linux/io.h>
  20#include <linux/moduleparam.h>
  21#include <linux/platform_device.h>
  22#include <linux/rfkill.h>
  23
  24/*
  25 * These values were obtained from disassembling and debugging the
  26 * PM.exe program installed in the Fujitsu-Siemens AMILO A1655G
  27 */
  28#define A1655_WIFI_COMMAND      0x10C5
  29#define A1655_WIFI_ON           0x25
  30#define A1655_WIFI_OFF          0x45
  31
  32static int amilo_a1655_rfkill_set_block(void *data, bool blocked)
  33{
  34        u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON;
  35        int rc;
  36
  37        i8042_lock_chip();
  38        rc = i8042_command(&param, A1655_WIFI_COMMAND);
  39        i8042_unlock_chip();
  40        return rc;
  41}
  42
  43static const struct rfkill_ops amilo_a1655_rfkill_ops = {
  44        .set_block = amilo_a1655_rfkill_set_block
  45};
  46
  47/*
  48 * These values were obtained from disassembling the PM.exe program
  49 * installed in the Fujitsu-Siemens AMILO M 7440
  50 */
  51#define M7440_PORT1             0x118f
  52#define M7440_PORT2             0x118e
  53#define M7440_RADIO_ON1         0x12
  54#define M7440_RADIO_ON2         0x80
  55#define M7440_RADIO_OFF1        0x10
  56#define M7440_RADIO_OFF2        0x00
  57
  58static int amilo_m7440_rfkill_set_block(void *data, bool blocked)
  59{
  60        u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1;
  61        u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2;
  62
  63        outb(val1, M7440_PORT1);
  64        outb(val2, M7440_PORT2);
  65
  66        /* Check whether the state has changed correctly */
  67        if (inb(M7440_PORT1) != val1 || inb(M7440_PORT2) != val2)
  68                return -EIO;
  69
  70        return 0;
  71}
  72
  73static const struct rfkill_ops amilo_m7440_rfkill_ops = {
  74        .set_block = amilo_m7440_rfkill_set_block
  75};
  76
  77static const struct dmi_system_id amilo_rfkill_id_table[] = {
  78        {
  79                .matches = {
  80                        DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  81                        DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"),
  82                },
  83                .driver_data = (void *)&amilo_a1655_rfkill_ops
  84        },
  85        {
  86                .matches = {
  87                        DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  88                        DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"),
  89                },
  90                .driver_data = (void *)&amilo_a1655_rfkill_ops
  91        },
  92        {
  93                .matches = {
  94                        DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
  95                        DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"),
  96                },
  97                .driver_data = (void *)&amilo_m7440_rfkill_ops
  98        },
  99        {}
 100};
 101
 102static struct platform_device *amilo_rfkill_pdev;
 103static struct rfkill *amilo_rfkill_dev;
 104
 105static int amilo_rfkill_probe(struct platform_device *device)
 106{
 107        int rc;
 108        const struct dmi_system_id *system_id =
 109                dmi_first_match(amilo_rfkill_id_table);
 110
 111        if (!system_id)
 112                return -ENXIO;
 113
 114        amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev,
 115                                        RFKILL_TYPE_WLAN,
 116                                        system_id->driver_data, NULL);
 117        if (!amilo_rfkill_dev)
 118                return -ENOMEM;
 119
 120        rc = rfkill_register(amilo_rfkill_dev);
 121        if (rc)
 122                goto fail;
 123
 124        return 0;
 125
 126fail:
 127        rfkill_destroy(amilo_rfkill_dev);
 128        return rc;
 129}
 130
 131static int amilo_rfkill_remove(struct platform_device *device)
 132{
 133        rfkill_unregister(amilo_rfkill_dev);
 134        rfkill_destroy(amilo_rfkill_dev);
 135        return 0;
 136}
 137
 138static struct platform_driver amilo_rfkill_driver = {
 139        .driver = {
 140                .name   = KBUILD_MODNAME,
 141        },
 142        .probe  = amilo_rfkill_probe,
 143        .remove = amilo_rfkill_remove,
 144};
 145
 146static int __init amilo_rfkill_init(void)
 147{
 148        int rc;
 149
 150        if (dmi_first_match(amilo_rfkill_id_table) == NULL)
 151                return -ENODEV;
 152
 153        rc = platform_driver_register(&amilo_rfkill_driver);
 154        if (rc)
 155                return rc;
 156
 157        amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1,
 158                                                            NULL, 0);
 159        if (IS_ERR(amilo_rfkill_pdev)) {
 160                rc = PTR_ERR(amilo_rfkill_pdev);
 161                goto fail;
 162        }
 163
 164        return 0;
 165
 166fail:
 167        platform_driver_unregister(&amilo_rfkill_driver);
 168        return rc;
 169}
 170
 171static void __exit amilo_rfkill_exit(void)
 172{
 173        platform_device_unregister(amilo_rfkill_pdev);
 174        platform_driver_unregister(&amilo_rfkill_driver);
 175}
 176
 177MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");
 178MODULE_LICENSE("GPL");
 179MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);
 180
 181module_init(amilo_rfkill_init);
 182module_exit(amilo_rfkill_exit);
 183