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 32 static 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(¶m, A1655_WIFI_COMMAND); 39 i8042_unlock_chip(); 40 return rc; 41 } 42 43 static 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 58 static 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 73 static const struct rfkill_ops amilo_m7440_rfkill_ops = { 74 .set_block = amilo_m7440_rfkill_set_block 75 }; 76 77 static 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 M7440"), 89 }, 90 .driver_data = (void *)&amilo_m7440_rfkill_ops 91 }, 92 {} 93 }; 94 95 static struct platform_device *amilo_rfkill_pdev; 96 static struct rfkill *amilo_rfkill_dev; 97 98 static int amilo_rfkill_probe(struct platform_device *device) 99 { 100 int rc; 101 const struct dmi_system_id *system_id = 102 dmi_first_match(amilo_rfkill_id_table); 103 104 if (!system_id) 105 return -ENXIO; 106 107 amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev, 108 RFKILL_TYPE_WLAN, 109 system_id->driver_data, NULL); 110 if (!amilo_rfkill_dev) 111 return -ENOMEM; 112 113 rc = rfkill_register(amilo_rfkill_dev); 114 if (rc) 115 goto fail; 116 117 return 0; 118 119 fail: 120 rfkill_destroy(amilo_rfkill_dev); 121 return rc; 122 } 123 124 static int amilo_rfkill_remove(struct platform_device *device) 125 { 126 rfkill_unregister(amilo_rfkill_dev); 127 rfkill_destroy(amilo_rfkill_dev); 128 return 0; 129 } 130 131 static struct platform_driver amilo_rfkill_driver = { 132 .driver = { 133 .name = KBUILD_MODNAME, 134 .owner = THIS_MODULE, 135 }, 136 .probe = amilo_rfkill_probe, 137 .remove = amilo_rfkill_remove, 138 }; 139 140 static int __init amilo_rfkill_init(void) 141 { 142 int rc; 143 144 if (dmi_first_match(amilo_rfkill_id_table) == NULL) 145 return -ENODEV; 146 147 rc = platform_driver_register(&amilo_rfkill_driver); 148 if (rc) 149 return rc; 150 151 amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, -1, 152 NULL, 0); 153 if (IS_ERR(amilo_rfkill_pdev)) { 154 rc = PTR_ERR(amilo_rfkill_pdev); 155 goto fail; 156 } 157 158 return 0; 159 160 fail: 161 platform_driver_unregister(&amilo_rfkill_driver); 162 return rc; 163 } 164 165 static void __exit amilo_rfkill_exit(void) 166 { 167 platform_device_unregister(amilo_rfkill_pdev); 168 platform_driver_unregister(&amilo_rfkill_driver); 169 } 170 171 MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>"); 172 MODULE_LICENSE("GPL"); 173 MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table); 174 175 module_init(amilo_rfkill_init); 176 module_exit(amilo_rfkill_exit); 177