1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Support for rfkill on some Fujitsu-Siemens Amilo laptops. 4 * Copyright 2011 Ben Hutchings. 5 * 6 * Based in part on the fsam7440 driver, which is: 7 * Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata. 8 * and on the fsaa1655g driver, which is: 9 * Copyright 2006 Martin Večeřa. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/dmi.h> 14 #include <linux/i8042.h> 15 #include <linux/io.h> 16 #include <linux/moduleparam.h> 17 #include <linux/platform_device.h> 18 #include <linux/rfkill.h> 19 20 /* 21 * These values were obtained from disassembling and debugging the 22 * PM.exe program installed in the Fujitsu-Siemens AMILO A1655G 23 */ 24 #define A1655_WIFI_COMMAND 0x10C5 25 #define A1655_WIFI_ON 0x25 26 #define A1655_WIFI_OFF 0x45 27 28 static int amilo_a1655_rfkill_set_block(void *data, bool blocked) 29 { 30 u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON; 31 int rc; 32 33 i8042_lock_chip(); 34 rc = i8042_command(¶m, A1655_WIFI_COMMAND); 35 i8042_unlock_chip(); 36 return rc; 37 } 38 39 static const struct rfkill_ops amilo_a1655_rfkill_ops = { 40 .set_block = amilo_a1655_rfkill_set_block 41 }; 42 43 /* 44 * These values were obtained from disassembling the PM.exe program 45 * installed in the Fujitsu-Siemens AMILO M 7440 46 */ 47 #define M7440_PORT1 0x118f 48 #define M7440_PORT2 0x118e 49 #define M7440_RADIO_ON1 0x12 50 #define M7440_RADIO_ON2 0x80 51 #define M7440_RADIO_OFF1 0x10 52 #define M7440_RADIO_OFF2 0x00 53 54 static int amilo_m7440_rfkill_set_block(void *data, bool blocked) 55 { 56 u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1; 57 u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2; 58 59 outb(val1, M7440_PORT1); 60 outb(val2, M7440_PORT2); 61 62 /* Check whether the state has changed correctly */ 63 if (inb(M7440_PORT1) != val1 || inb(M7440_PORT2) != val2) 64 return -EIO; 65 66 return 0; 67 } 68 69 static const struct rfkill_ops amilo_m7440_rfkill_ops = { 70 .set_block = amilo_m7440_rfkill_set_block 71 }; 72 73 static const struct dmi_system_id amilo_rfkill_id_table[] = { 74 { 75 .matches = { 76 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 77 DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"), 78 }, 79 .driver_data = (void *)&amilo_a1655_rfkill_ops 80 }, 81 { 82 .matches = { 83 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 84 DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"), 85 }, 86 .driver_data = (void *)&amilo_a1655_rfkill_ops 87 }, 88 { 89 .matches = { 90 DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), 91 DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"), 92 }, 93 .driver_data = (void *)&amilo_m7440_rfkill_ops 94 }, 95 {} 96 }; 97 98 static struct platform_device *amilo_rfkill_pdev; 99 static struct rfkill *amilo_rfkill_dev; 100 101 static int amilo_rfkill_probe(struct platform_device *device) 102 { 103 int rc; 104 const struct dmi_system_id *system_id = 105 dmi_first_match(amilo_rfkill_id_table); 106 107 if (!system_id) 108 return -ENXIO; 109 110 amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev, 111 RFKILL_TYPE_WLAN, 112 system_id->driver_data, NULL); 113 if (!amilo_rfkill_dev) 114 return -ENOMEM; 115 116 rc = rfkill_register(amilo_rfkill_dev); 117 if (rc) 118 goto fail; 119 120 return 0; 121 122 fail: 123 rfkill_destroy(amilo_rfkill_dev); 124 return rc; 125 } 126 127 static int amilo_rfkill_remove(struct platform_device *device) 128 { 129 rfkill_unregister(amilo_rfkill_dev); 130 rfkill_destroy(amilo_rfkill_dev); 131 return 0; 132 } 133 134 static struct platform_driver amilo_rfkill_driver = { 135 .driver = { 136 .name = KBUILD_MODNAME, 137 }, 138 .probe = amilo_rfkill_probe, 139 .remove = amilo_rfkill_remove, 140 }; 141 142 static int __init amilo_rfkill_init(void) 143 { 144 int rc; 145 146 if (dmi_first_match(amilo_rfkill_id_table) == NULL) 147 return -ENODEV; 148 149 rc = platform_driver_register(&amilo_rfkill_driver); 150 if (rc) 151 return rc; 152 153 amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, 154 PLATFORM_DEVID_NONE, 155 NULL, 0); 156 if (IS_ERR(amilo_rfkill_pdev)) { 157 rc = PTR_ERR(amilo_rfkill_pdev); 158 goto fail; 159 } 160 161 return 0; 162 163 fail: 164 platform_driver_unregister(&amilo_rfkill_driver); 165 return rc; 166 } 167 168 static void __exit amilo_rfkill_exit(void) 169 { 170 platform_device_unregister(amilo_rfkill_pdev); 171 platform_driver_unregister(&amilo_rfkill_driver); 172 } 173 174 MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>"); 175 MODULE_LICENSE("GPL"); 176 MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table); 177 178 module_init(amilo_rfkill_init); 179 module_exit(amilo_rfkill_exit); 180