diff options
Diffstat (limited to 'drivers/platform/x86/amilo-rfkill.c')
| -rw-r--r-- | drivers/platform/x86/amilo-rfkill.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/drivers/platform/x86/amilo-rfkill.c b/drivers/platform/x86/amilo-rfkill.c new file mode 100644 index 000000000..3e313c4d5 --- /dev/null +++ b/drivers/platform/x86/amilo-rfkill.c @@ -0,0 +1,179 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Support for rfkill on some Fujitsu-Siemens Amilo laptops. + * Copyright 2011 Ben Hutchings. + * + * Based in part on the fsam7440 driver, which is: + * Copyright 2005 Alejandro Vidal Mata & Javier Vidal Mata. + * and on the fsaa1655g driver, which is: + * Copyright 2006 Martin Večeřa. + */ + +#include <linux/module.h> +#include <linux/dmi.h> +#include <linux/i8042.h> +#include <linux/io.h> +#include <linux/moduleparam.h> +#include <linux/platform_device.h> +#include <linux/rfkill.h> + +/* + * These values were obtained from disassembling and debugging the + * PM.exe program installed in the Fujitsu-Siemens AMILO A1655G + */ +#define A1655_WIFI_COMMAND 0x10C5 +#define A1655_WIFI_ON 0x25 +#define A1655_WIFI_OFF 0x45 + +static int amilo_a1655_rfkill_set_block(void *data, bool blocked) +{ + u8 param = blocked ? A1655_WIFI_OFF : A1655_WIFI_ON; + int rc; + + i8042_lock_chip(); + rc = i8042_command(¶m, A1655_WIFI_COMMAND); + i8042_unlock_chip(); + return rc; +} + +static const struct rfkill_ops amilo_a1655_rfkill_ops = { + .set_block = amilo_a1655_rfkill_set_block +}; + +/* + * These values were obtained from disassembling the PM.exe program + * installed in the Fujitsu-Siemens AMILO M 7440 + */ +#define M7440_PORT1 0x118f +#define M7440_PORT2 0x118e +#define M7440_RADIO_ON1 0x12 +#define M7440_RADIO_ON2 0x80 +#define M7440_RADIO_OFF1 0x10 +#define M7440_RADIO_OFF2 0x00 + +static int amilo_m7440_rfkill_set_block(void *data, bool blocked) +{ + u8 val1 = blocked ? M7440_RADIO_OFF1 : M7440_RADIO_ON1; + u8 val2 = blocked ? M7440_RADIO_OFF2 : M7440_RADIO_ON2; + + outb(val1, M7440_PORT1); + outb(val2, M7440_PORT2); + + /* Check whether the state has changed correctly */ + if (inb(M7440_PORT1) != val1 || inb(M7440_PORT2) != val2) + return -EIO; + + return 0; +} + +static const struct rfkill_ops amilo_m7440_rfkill_ops = { + .set_block = amilo_m7440_rfkill_set_block +}; + +static const struct dmi_system_id amilo_rfkill_id_table[] = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_BOARD_NAME, "AMILO A1655"), + }, + .driver_data = (void *)&amilo_a1655_rfkill_ops + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_BOARD_NAME, "AMILO L1310"), + }, + .driver_data = (void *)&amilo_a1655_rfkill_ops + }, + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"), + DMI_MATCH(DMI_BOARD_NAME, "AMILO M7440"), + }, + .driver_data = (void *)&amilo_m7440_rfkill_ops + }, + {} +}; + +static struct platform_device *amilo_rfkill_pdev; +static struct rfkill *amilo_rfkill_dev; + +static int amilo_rfkill_probe(struct platform_device *device) +{ + int rc; + const struct dmi_system_id *system_id = + dmi_first_match(amilo_rfkill_id_table); + + if (!system_id) + return -ENXIO; + + amilo_rfkill_dev = rfkill_alloc(KBUILD_MODNAME, &device->dev, + RFKILL_TYPE_WLAN, + system_id->driver_data, NULL); + if (!amilo_rfkill_dev) + return -ENOMEM; + + rc = rfkill_register(amilo_rfkill_dev); + if (rc) + goto fail; + + return 0; + +fail: + rfkill_destroy(amilo_rfkill_dev); + return rc; +} + +static int amilo_rfkill_remove(struct platform_device *device) +{ + rfkill_unregister(amilo_rfkill_dev); + rfkill_destroy(amilo_rfkill_dev); + return 0; +} + +static struct platform_driver amilo_rfkill_driver = { + .driver = { + .name = KBUILD_MODNAME, + }, + .probe = amilo_rfkill_probe, + .remove = amilo_rfkill_remove, +}; + +static int __init amilo_rfkill_init(void) +{ + int rc; + + if (dmi_first_match(amilo_rfkill_id_table) == NULL) + return -ENODEV; + + rc = platform_driver_register(&amilo_rfkill_driver); + if (rc) + return rc; + + amilo_rfkill_pdev = platform_device_register_simple(KBUILD_MODNAME, + PLATFORM_DEVID_NONE, + NULL, 0); + if (IS_ERR(amilo_rfkill_pdev)) { + rc = PTR_ERR(amilo_rfkill_pdev); + goto fail; + } + + return 0; + +fail: + platform_driver_unregister(&amilo_rfkill_driver); + return rc; +} + +static void __exit amilo_rfkill_exit(void) +{ + platform_device_unregister(amilo_rfkill_pdev); + platform_driver_unregister(&amilo_rfkill_driver); +} + +MODULE_AUTHOR("Ben Hutchings <ben@decadent.org.uk>"); +MODULE_LICENSE("GPL"); +MODULE_DEVICE_TABLE(dmi, amilo_rfkill_id_table); + +module_init(amilo_rfkill_init); +module_exit(amilo_rfkill_exit); |