From d5c051f1080e0eec55f3fc42c37d941681941628 Mon Sep 17 00:00:00 2001 From: Thadeu Lima de Souza Cascardo Date: Tue, 27 Apr 2010 13:15:00 -0300 Subject: [PATCH] classmate-laptop: Add RFKILL support. The RFKILL device shares the same ACPI device used for backlight. So, it required a new struct sharing both a backlight_device and a rfkill device. Signed-off-by: Thadeu Lima de Souza Cascardo --- drivers/platform/x86/classmate-laptop.c | 170 +++++++++++++++++++++--- 1 file changed, 148 insertions(+), 22 deletions(-) diff --git a/drivers/platform/x86/classmate-laptop.c b/drivers/platform/x86/classmate-laptop.c index 7f9e5ddc9498..3bf399fe2bbc 100644 --- a/drivers/platform/x86/classmate-laptop.c +++ b/drivers/platform/x86/classmate-laptop.c @@ -24,6 +24,7 @@ #include #include #include +#include MODULE_LICENSE("GPL"); @@ -37,7 +38,7 @@ struct cmpc_accel { #define CMPC_ACCEL_HID "ACCE0000" #define CMPC_TABLET_HID "TBLT0000" -#define CMPC_BL_HID "IPML200" +#define CMPC_IPML_HID "IPML200" #define CMPC_KEYS_HID "FnBT0000" /* @@ -461,43 +462,168 @@ static const struct backlight_ops cmpc_bl_ops = { .update_status = cmpc_bl_update_status }; -static int cmpc_bl_add(struct acpi_device *acpi) +/* + * RFKILL code. + */ + +static acpi_status cmpc_get_rfkill_wlan(acpi_handle handle, + unsigned long long *value) { - struct backlight_properties props; + union acpi_object param; + struct acpi_object_list input; + unsigned long long output; + acpi_status status; + + param.type = ACPI_TYPE_INTEGER; + param.integer.value = 0xC1; + input.count = 1; + input.pointer = ¶m; + status = acpi_evaluate_integer(handle, "GRDI", &input, &output); + if (ACPI_SUCCESS(status)) + *value = output; + return status; +} + +static acpi_status cmpc_set_rfkill_wlan(acpi_handle handle, + unsigned long long value) +{ + union acpi_object param[2]; + struct acpi_object_list input; + acpi_status status; + unsigned long long output; + + param[0].type = ACPI_TYPE_INTEGER; + param[0].integer.value = 0xC1; + param[1].type = ACPI_TYPE_INTEGER; + param[1].integer.value = value; + input.count = 2; + input.pointer = param; + status = acpi_evaluate_integer(handle, "GWRI", &input, &output); + return status; +} + +static void cmpc_rfkill_query(struct rfkill *rfkill, void *data) +{ + acpi_status status; + acpi_handle handle; + unsigned long long state; + bool blocked; + + handle = data; + status = cmpc_get_rfkill_wlan(handle, &state); + if (ACPI_SUCCESS(status)) { + blocked = state & 1 ? false : true; + rfkill_set_sw_state(rfkill, blocked); + } +} + +static int cmpc_rfkill_block(void *data, bool blocked) +{ + acpi_status status; + acpi_handle handle; + unsigned long long state; + + handle = data; + status = cmpc_get_rfkill_wlan(handle, &state); + if (ACPI_FAILURE(status)) + return -ENODEV; + if (blocked) + state &= ~1; + else + state |= 1; + status = cmpc_set_rfkill_wlan(handle, state); + if (ACPI_FAILURE(status)) + return -ENODEV; + return 0; +} + +static const struct rfkill_ops cmpc_rfkill_ops = { + .query = cmpc_rfkill_query, + .set_block = cmpc_rfkill_block, +}; + +/* + * Common backlight and rfkill code. + */ + +struct ipml200_dev { struct backlight_device *bd; + struct rfkill *rf; +}; + +static int cmpc_ipml_add(struct acpi_device *acpi) +{ + int retval; + struct ipml200_dev *ipml; + struct backlight_properties props; + + ipml = kmalloc(sizeof(*ipml), GFP_KERNEL); + if (ipml == NULL) + return -ENOMEM; memset(&props, 0, sizeof(struct backlight_properties)); props.max_brightness = 7; - bd = backlight_device_register("cmpc_bl", &acpi->dev, acpi->handle, - &cmpc_bl_ops, &props); - if (IS_ERR(bd)) - return PTR_ERR(bd); - dev_set_drvdata(&acpi->dev, bd); + ipml->bd = backlight_device_register("cmpc_bl", &acpi->dev, + acpi->handle, &cmpc_bl_ops, + &props); + if (IS_ERR(ipml->bd)) { + retval = PTR_ERR(ipml->bd); + goto out_bd; + } + + ipml->rf = rfkill_alloc("cmpc_rfkill", &acpi->dev, RFKILL_TYPE_WLAN, + &cmpc_rfkill_ops, acpi->handle); + /* rfkill_alloc may fail if RFKILL is disabled. We should still work + * anyway. */ + if (!IS_ERR(ipml->rf)) { + retval = rfkill_register(ipml->rf); + if (retval) { + rfkill_destroy(ipml->rf); + ipml->rf = NULL; + } + } else { + ipml->rf = NULL; + } + + dev_set_drvdata(&acpi->dev, ipml); return 0; + +out_bd: + kfree(ipml); + return retval; } -static int cmpc_bl_remove(struct acpi_device *acpi, int type) +static int cmpc_ipml_remove(struct acpi_device *acpi, int type) { - struct backlight_device *bd; + struct ipml200_dev *ipml; + + ipml = dev_get_drvdata(&acpi->dev); + + backlight_device_unregister(ipml->bd); + + if (ipml->rf) { + rfkill_unregister(ipml->rf); + rfkill_destroy(ipml->rf); + } + + kfree(ipml); - bd = dev_get_drvdata(&acpi->dev); - backlight_device_unregister(bd); return 0; } -static const struct acpi_device_id cmpc_bl_device_ids[] = { - {CMPC_BL_HID, 0}, +static const struct acpi_device_id cmpc_ipml_device_ids[] = { + {CMPC_IPML_HID, 0}, {"", 0} }; -static struct acpi_driver cmpc_bl_acpi_driver = { +static struct acpi_driver cmpc_ipml_acpi_driver = { .owner = THIS_MODULE, .name = "cmpc", .class = "cmpc", - .ids = cmpc_bl_device_ids, + .ids = cmpc_ipml_device_ids, .ops = { - .add = cmpc_bl_add, - .remove = cmpc_bl_remove + .add = cmpc_ipml_add, + .remove = cmpc_ipml_remove } }; @@ -580,7 +706,7 @@ static int cmpc_init(void) if (r) goto failed_keys; - r = acpi_bus_register_driver(&cmpc_bl_acpi_driver); + r = acpi_bus_register_driver(&cmpc_ipml_acpi_driver); if (r) goto failed_bl; @@ -598,7 +724,7 @@ failed_accel: acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver); failed_tablet: - acpi_bus_unregister_driver(&cmpc_bl_acpi_driver); + acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver); failed_bl: acpi_bus_unregister_driver(&cmpc_keys_acpi_driver); @@ -611,7 +737,7 @@ static void cmpc_exit(void) { acpi_bus_unregister_driver(&cmpc_accel_acpi_driver); acpi_bus_unregister_driver(&cmpc_tablet_acpi_driver); - acpi_bus_unregister_driver(&cmpc_bl_acpi_driver); + acpi_bus_unregister_driver(&cmpc_ipml_acpi_driver); acpi_bus_unregister_driver(&cmpc_keys_acpi_driver); } @@ -621,7 +747,7 @@ module_exit(cmpc_exit); static const struct acpi_device_id cmpc_device_ids[] = { {CMPC_ACCEL_HID, 0}, {CMPC_TABLET_HID, 0}, - {CMPC_BL_HID, 0}, + {CMPC_IPML_HID, 0}, {CMPC_KEYS_HID, 0}, {"", 0} };