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1// SPDX-License-Identifier: GPL-2.0-or-later2/*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 the22 * PM.exe program installed in the Fujitsu-Siemens AMILO A1655G23 */24#define A1655_WIFI_COMMAND 0x10C525#define A1655_WIFI_ON 0x2526#define A1655_WIFI_OFF 0x4527 28static 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 39static const struct rfkill_ops amilo_a1655_rfkill_ops = {40 .set_block = amilo_a1655_rfkill_set_block41};42 43/*44 * These values were obtained from disassembling the PM.exe program45 * installed in the Fujitsu-Siemens AMILO M 744046 */47#define M7440_PORT1 0x118f48#define M7440_PORT2 0x118e49#define M7440_RADIO_ON1 0x1250#define M7440_RADIO_ON2 0x8051#define M7440_RADIO_OFF1 0x1052#define M7440_RADIO_OFF2 0x0053 54static 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 69static const struct rfkill_ops amilo_m7440_rfkill_ops = {70 .set_block = amilo_m7440_rfkill_set_block71};72 73static 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_ops80 },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_ops87 },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_ops94 },95 {}96};97 98static struct platform_device *amilo_rfkill_pdev;99static struct rfkill *amilo_rfkill_dev;100 101static 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 122fail:123 rfkill_destroy(amilo_rfkill_dev);124 return rc;125}126 127static void amilo_rfkill_remove(struct platform_device *device)128{129 rfkill_unregister(amilo_rfkill_dev);130 rfkill_destroy(amilo_rfkill_dev);131}132 133static struct platform_driver amilo_rfkill_driver = {134 .driver = {135 .name = KBUILD_MODNAME,136 },137 .probe = amilo_rfkill_probe,138 .remove_new = amilo_rfkill_remove,139};140 141static int __init amilo_rfkill_init(void)142{143 int rc;144 145 if (dmi_first_match(amilo_rfkill_id_table) == NULL)146 return -ENODEV;147 148 rc = platform_driver_register(&amilo_rfkill_driver);149 if (rc)150 return rc;151 152 amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME,153 PLATFORM_DEVID_NONE,154 NULL, 0);155 if (IS_ERR(amilo_rfkill_pdev)) {156 rc = PTR_ERR(amilo_rfkill_pdev);157 goto fail;158 }159 160 return 0;161 162fail:163 platform_driver_unregister(&amilo_rfkill_driver);164 return rc;165}166 167static void __exit amilo_rfkill_exit(void)168{169 platform_device_unregister(amilo_rfkill_pdev);170 platform_driver_unregister(&amilo_rfkill_driver);171}172 173MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>");174MODULE_DESCRIPTION("Fujitsu-Siemens Amilo rfkill support");175MODULE_LICENSE("GPL");176MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table);177 178module_init(amilo_rfkill_init);179module_exit(amilo_rfkill_exit);180