[PATCH 12/41] sony-laptop: create from sony_acpi

Len Brown
2007-02-13T05:50:03Z

From: Mattia Dongili <malattia@linux.it>

Move drivers/acpi/sony_acpi.c to drivers/misc/sony-laptop.c with all the
necessary configuration.
The SONY_LAPTOP config option substitutes the old ACPI_SONY and is 'default n'
now.

Signed-off-by: Mattia Dongili <malattia@linux.it>
Signed-off-by: Len Brown <len.brown@intel.com>
---
drivers/acpi/Kconfig | 15 --
drivers/acpi/Makefile | 1 -
drivers/acpi/sony_acpi.c | 504 --------------------------------------------
drivers/misc/Kconfig | 14 ++
drivers/misc/Makefile | 1 +
drivers/misc/sony-laptop.c | 504 ++++++++++++++++++++++++++++++++++++++++++++
6 files changed, 519 insertions(+), 520 deletions(-)
delete mode 100644 drivers/acpi/sony_acpi.c
create mode 100644 drivers/misc/sony-laptop.c

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 364e6fe..f4f000a 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -252,21 +252,6 @@ config ACPI_TOSHIBA
If you have a legacy free Toshiba laptop (such as the Libretto L1
series), say Y.

-config ACPI_SONY
- tristate "Sony Laptop Extras"
- depends on X86 && ACPI
- select BACKLIGHT_CLASS_DEVICE
- default m
- ---help---
- This mini-driver drives the ACPI SNC device present in the
- ACPI BIOS of the Sony Vaio laptops.
-
- It gives access to some extra laptop functionalities. In
- its current form, the only thing this driver does is letting
- the user set or query the screen brightness.
-
- Read <file:Documentation/acpi/sony_acpi.txt> for more information.
-
config ACPI_CUSTOM_DSDT
bool "Include Custom DSDT"
depends on !STANDALONE
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 31b9ad2..bce7ca2 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -53,7 +53,6 @@ obj-$(CONFIG_ACPI_THERMAL) += thermal.o
obj-$(CONFIG_ACPI_SYSTEM) += system.o event.o
obj-$(CONFIG_ACPI_DEBUG) += debug.o
obj-$(CONFIG_ACPI_NUMA) += numa.o
-obj-$(CONFIG_ACPI_SONY) += sony_acpi.o
obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o
obj-$(CONFIG_ACPI_IBM) += ibm_acpi.o
obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
diff --git a/drivers/acpi/sony_acpi.c b/drivers/acpi/sony_acpi.c
deleted file mode 100644
index c01d98d..0000000
--- a/drivers/acpi/sony_acpi.c
+++ /dev/null
@@ -1,504 +0,0 @@
-/*
- * ACPI Sony Notebook Control Driver (SNC)
- *
- * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
- *
- * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
- * which are copyrighted by their respective authors.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/backlight.h>
-#include <linux/err.h>
-#include <acpi/acpi_drivers.h>
-#include <acpi/acpi_bus.h>
-#include <asm/uaccess.h>
-
-#define ACPI_SNC_CLASS "sony"
-#define ACPI_SNC_HID "SNY5001"
-#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.3"
-
-/* the device uses 1-based values, while the backlight subsystem uses
- 0-based values */
-#define SONY_MAX_BRIGHTNESS 8
-
-#define LOG_PFX KERN_WARNING "sony_acpi: "
-
-MODULE_AUTHOR("Stelian Pop");
-MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
-MODULE_LICENSE("GPL");
-
-static int debug;
-module_param(debug, int, 0);
-MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
- "the development of this driver");
-
-static acpi_handle sony_acpi_handle;
-static struct proc_dir_entry *sony_acpi_dir;
-static struct acpi_device *sony_acpi_acpi_device = NULL;
-
-static int sony_backlight_update_status(struct backlight_device *bd);
-static int sony_backlight_get_brightness(struct backlight_device *bd);
-static struct backlight_device *sony_backlight_device;
-static struct backlight_properties sony_backlight_properties = {
- .owner = THIS_MODULE,
- .update_status = sony_backlight_update_status,
- .get_brightness = sony_backlight_get_brightness,
- .max_brightness = SONY_MAX_BRIGHTNESS - 1,
-};
-
-static struct sony_acpi_value {
- char *name; /* name of the entry */
- struct proc_dir_entry *proc; /* /proc entry */
- char *acpiget;/* name of the ACPI get function */
- char *acpiset;/* name of the ACPI get function */
- int min; /* minimum allowed value or -1 */
- int max; /* maximum allowed value or -1 */
- int value; /* current setting */
- int valid; /* Has ever been set */
- int debug; /* active only in debug mode ? */
-} sony_acpi_values[] = {
- {
- /* for backward compatibility only */
- .name = "brightness",
- .acpiget = "GBRT",
- .acpiset = "SBRT",
- .min = 1,
- .max = SONY_MAX_BRIGHTNESS,
- .debug = 0,
- },
- {
- .name = "brightness_default",
- .acpiget = "GPBR",
- .acpiset = "SPBR",
- .min = 1,
- .max = SONY_MAX_BRIGHTNESS,
- .debug = 0,
- },
- {
- .name = "fnkey",
- .acpiget = "GHKE",
- .debug = 0,
- },
- {
- .name = "cdpower",
- .acpiget = "GCDP",
- .acpiset = "SCDP",
- .min = 0,
- .max = 1,
- .debug = 0,
- },
- {
- .name = "cdpower",
- .acpiget = "GCDP",
- .acpiset = "CDPW",
- .min = 0,
- .max = 1,
- .debug = 0,
- },
- {
- .name = "audiopower",
- .acpiget = "GAZP",
- .acpiset = "AZPW",
- .min = 0,
- .max = 1,
- .debug = 0,
- },
- {
- .name = "lanpower",
- .acpiget = "GLNP",
- .acpiset = "LNPW",
- .min = 0,
- .max = 1,
- .debug = 1,
- },
- {
- .name = "PID",
- .acpiget = "GPID",
- .debug = 1,
- },
- {
- .name = "CTR",
- .acpiget = "GCTR",
- .acpiset = "SCTR",
- .min = -1,
- .max = -1,
- .debug = 1,
- },
- {
- .name = "PCR",
- .acpiget = "GPCR",
- .acpiset = "SPCR",
- .min = -1,
- .max = -1,
- .debug = 1,
- },
- {
- .name = "CMI",
- .acpiget = "GCMI",
- .acpiset = "SCMI",
- .min = -1,
- .max = -1,
- .debug = 1,
- },
- {
- .name = NULL,
- }
-};
-
-static int acpi_callgetfunc(acpi_handle handle, char *name, int *result)
-{
- struct acpi_buffer output;
- union acpi_object out_obj;
- acpi_status status;
-
- output.length = sizeof(out_obj);
- output.pointer = &out_obj;
-
- status = acpi_evaluate_object(handle, name, NULL, &output);
- if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
- *result = out_obj.integer.value;
- return 0;
- }
-
- printk(LOG_PFX "acpi_callreadfunc failed\n");
-
- return -1;
-}
-
-static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
- int *result)
-{
- struct acpi_object_list params;
- union acpi_object in_obj;
- struct acpi_buffer output;
- union acpi_object out_obj;
- acpi_status status;
-
- params.count = 1;
- params.pointer = &in_obj;
- in_obj.type = ACPI_TYPE_INTEGER;
- in_obj.integer.value = value;
-
- output.length = sizeof(out_obj);
- output.pointer = &out_obj;
-
- status = acpi_evaluate_object(handle, name, &params, &output);
- if (status == AE_OK) {
- if (result != NULL) {
- if (out_obj.type != ACPI_TYPE_INTEGER) {
- printk(LOG_PFX "acpi_evaluate_object bad "
- "return type\n");
- return -1;
- }
- *result = out_obj.integer.value;
- }
- return 0;
- }
-
- printk(LOG_PFX "acpi_evaluate_object failed\n");
-
- return -1;
-}
-
-static int parse_buffer(const char __user *buffer, unsigned long count,
- int *val) {
- char s[32];
- int ret;
-
- if (count > 31)
- return -EINVAL;
- if (copy_from_user(s, buffer, count))
- return -EFAULT;
- s[count] = '\0';
- ret = simple_strtoul(s, NULL, 10);
- *val = ret;
- return 0;
-}
-
-static int sony_acpi_read(char* page, char** start, off_t off, int count,
- int* eof, void *data)
-{
- struct sony_acpi_value *item = data;
- int value;
-
- if (!item->acpiget)
- return -EIO;
-
- if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
- return -EIO;
-
- return sprintf(page, "%d\n", value);
-}
-
-static int sony_acpi_write(struct file *file, const char __user *buffer,
- unsigned long count, void *data)
-{
- struct sony_acpi_value *item = data;
- int result;
- int value;
-
- if (!item->acpiset)
- return -EIO;
-
- if ((result = parse_buffer(buffer, count, &value)) < 0)
- return result;
-
- if (item->min != -1 && value < item->min)
- return -EINVAL;
- if (item->max != -1 && value > item->max)
- return -EINVAL;
-
- if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
- return -EIO;
- item->value = value;
- item->valid = 1;
- return count;
-}
-
-static int sony_acpi_resume(struct acpi_device *device)
-{
- struct sony_acpi_value *item;
-
- for (item = sony_acpi_values; item->name; item++) {
- int ret;
-
- if (!item->valid)
- continue;
- ret = acpi_callsetfunc(sony_acpi_handle, item->acpiset,
- item->value, NULL);
- if (ret < 0) {
- printk("%s: %d\n", __FUNCTION__, ret);
- break;
- }
- }
- return 0;
-}
-
-static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
-{
- if (debug)
- printk(LOG_PFX "sony_acpi_notify, event: %d\n", event);
- acpi_bus_generate_event(sony_acpi_acpi_device, 1, event);
-}
-
-static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
- void *context, void **return_value)
-{
- struct acpi_namespace_node *node;
- union acpi_operand_object *operand;
-
- node = (struct acpi_namespace_node *) handle;
- operand = (union acpi_operand_object *) node->object;
-
- printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
- (u32) operand->method.param_count);
-
- return AE_OK;
-}
-
-static int sony_acpi_add(struct acpi_device *device)
-{
- acpi_status status;
- int result;
- acpi_handle handle;
- mode_t proc_file_mode;
- struct sony_acpi_value *item;
-
- sony_acpi_acpi_device = device;
-
- sony_acpi_handle = device->handle;
-
- acpi_driver_data(device) = NULL;
- acpi_device_dir(device) = sony_acpi_dir;
-
- if (debug) {
- status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
- 1, sony_walk_callback, NULL, NULL);
- if (ACPI_FAILURE(status)) {
- printk(LOG_PFX "unable to walk acpi resources\n");
- result = -ENODEV;
- goto outwalk;
- }
- }
-
- status = acpi_install_notify_handler(sony_acpi_handle,
- ACPI_DEVICE_NOTIFY,
- sony_acpi_notify,
- NULL);
- if (ACPI_FAILURE(status)) {
- printk(LOG_PFX "unable to install notify handler\n");
- result = -ENODEV;
- goto outnotify;
- }
-
- if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
- sony_backlight_device = backlight_device_register("sony", NULL,
- NULL, &sony_backlight_properties);
-
- if (IS_ERR(sony_backlight_device)) {
- printk(LOG_PFX "unable to register backlight device\n");
- sony_backlight_device = NULL;
- }
- else
- sony_backlight_properties.brightness =
- sony_backlight_get_brightness(sony_backlight_device);
- }
-
- for (item = sony_acpi_values; item->name; ++item) {
- proc_file_mode = 0;
-
- if (!debug && item->debug)
- continue;
-
- if (item->acpiget) {
- if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
- item->acpiget, &handle)))
- continue;
-
- proc_file_mode |= S_IRUSR;
- }
-
- if (item->acpiset) {
- if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
- item->acpiset, &handle)))
- continue;
-
- proc_file_mode |= S_IWUSR;
- }
-
- item->proc = create_proc_entry(item->name, proc_file_mode,
- acpi_device_dir(device));
- if (!item->proc) {
- printk(LOG_PFX "unable to create proc entry\n");
- result = -EIO;
- goto outproc;
- }
-
- item->proc->read_proc = sony_acpi_read;
- item->proc->write_proc = sony_acpi_write;
- item->proc->data = item;
- item->proc->owner = THIS_MODULE;
- }
-
- printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
-
- return 0;
-
-outproc:
- if (sony_backlight_device)
- backlight_device_unregister(sony_backlight_device);
-
- for (item = sony_acpi_values; item->name; ++item)
- if (item->proc)
- remove_proc_entry(item->name, acpi_device_dir(device));
-outnotify:
- status = acpi_remove_notify_handler(sony_acpi_handle,
- ACPI_DEVICE_NOTIFY,
- sony_acpi_notify);
- if (ACPI_FAILURE(status))
- printk(LOG_PFX "unable to remove notify handler\n");
-outwalk:
- return result;
-}
-
-static int sony_acpi_remove(struct acpi_device *device, int type)
-{
- acpi_status status;
- struct sony_acpi_value *item;
-
- if (sony_backlight_device)
- backlight_device_unregister(sony_backlight_device);
-
- sony_acpi_acpi_device = NULL;
-
- status = acpi_remove_notify_handler(sony_acpi_handle,
- ACPI_DEVICE_NOTIFY,
- sony_acpi_notify);
- if (ACPI_FAILURE(status))
- printk(LOG_PFX "unable to remove notify handler\n");
-
- for (item = sony_acpi_values; item->name; ++item)
- if (item->proc)
- remove_proc_entry(item->name, acpi_device_dir(device));
-
- printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
-
- return 0;
-}
-
-static int sony_backlight_update_status(struct backlight_device *bd)
-{
- return acpi_callsetfunc(sony_acpi_handle, "SBRT",
- bd->props->brightness + 1,
- NULL);
-}
-
-static int sony_backlight_get_brightness(struct backlight_device *bd)
-{
- int value;
-
- if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value))
- return 0;
- /* brightness levels are 1-based, while backlight ones are 0-based */
- return value - 1;
-}
-
-static struct acpi_driver sony_acpi_driver = {
- .name = ACPI_SNC_DRIVER_NAME,
- .class = ACPI_SNC_CLASS,
- .ids = ACPI_SNC_HID,
- .ops = {
- .add = sony_acpi_add,
- .remove = sony_acpi_remove,
- .resume = sony_acpi_resume,
- },
-};
-
-static int __init sony_acpi_init(void)
-{
- int result;
-
- sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
- if (!sony_acpi_dir) {
- printk(LOG_PFX "unable to create /proc entry\n");
- return -ENODEV;
- }
- sony_acpi_dir->owner = THIS_MODULE;
-
- result = acpi_bus_register_driver(&sony_acpi_driver);
- if (result < 0) {
- remove_proc_entry("sony", acpi_root_dir);
- return -ENODEV;
- }
- return 0;
-}
-
-
-static void __exit sony_acpi_exit(void)
-{
- acpi_bus_unregister_driver(&sony_acpi_driver);
- remove_proc_entry("sony", acpi_root_dir);
-}
-
-module_init(sony_acpi_init);
-module_exit(sony_acpi_exit);
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 00db31c..78fc47b 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -88,4 +88,18 @@ config MSI_LAPTOP

If you have an MSI S270 laptop, say Y or M here.

+config SONY_LAPTOP
+ tristate "Sony Laptop Extras"
+ depends on X86 && ACPI
+ select BACKLIGHT_CLASS_DEVICE
+ ---help---
+ This mini-driver drives the ACPI SNC device present in the
+ ACPI BIOS of the Sony Vaio laptops.
+
+ It gives access to some extra laptop functionalities. In
+ its current form, the only thing this driver does is letting
+ the user set or query the screen brightness.
+
+ Read <file:Documentation/acpi/sony_acpi.txt> for more information.
+
endmenu
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index c9e98ab..f86f9dc 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_LKDTM) += lkdtm.o
obj-$(CONFIG_TIFM_CORE) += tifm_core.o
obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o
obj-$(CONFIG_SGI_IOC4) += ioc4.o
+obj-$(CONFIG_SONY_LAPTOP) += sony-laptop.o
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
new file mode 100644
index 0000000..103657e
--- /dev/null
+++ b/drivers/misc/sony-laptop.c
@@ -0,0 +1,504 @@
+/*
+ * ACPI Sony Notebook Control Driver (SNC)
+ *
+ * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
+ *
+ * Parts of this driver inspired from asus_acpi.c and ibm_acpi.c
+ * which are copyrighted by their respective authors.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/backlight.h>
+#include <linux/err.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+#include <asm/uaccess.h>
+
+#define ACPI_SNC_CLASS "sony"
+#define ACPI_SNC_HID "SNY5001"
+#define ACPI_SNC_DRIVER_NAME "ACPI Sony Notebook Control Driver v0.3"
+
+/* the device uses 1-based values, while the backlight subsystem uses
+ 0-based values */
+#define SONY_MAX_BRIGHTNESS 8
+
+#define LOG_PFX KERN_WARNING "sony_acpi: "
+
+MODULE_AUTHOR("Stelian Pop");
+MODULE_DESCRIPTION(ACPI_SNC_DRIVER_NAME);
+MODULE_LICENSE("GPL");
+
+static int debug;
+module_param(debug, int, 0);
+MODULE_PARM_DESC(debug, "set this to 1 (and RTFM) if you want to help "
+ "the development of this driver");
+
+static acpi_handle sony_acpi_handle;
+static struct proc_dir_entry *sony_acpi_dir;
+static struct acpi_device *sony_acpi_acpi_device = NULL;
+
+static int sony_backlight_update_status(struct backlight_device *bd);
+static int sony_backlight_get_brightness(struct backlight_device *bd);
+static struct backlight_device *sony_backlight_device;
+static struct backlight_properties sony_backlight_properties = {
+ .owner = THIS_MODULE,
+ .update_status = sony_backlight_update_status,
+ .get_brightness = sony_backlight_get_brightness,
+ .max_brightness = SONY_MAX_BRIGHTNESS - 1,
+};
+
+static struct sony_acpi_value {
+ char *name; /* name of the entry */
+ struct proc_dir_entry *proc; /* /proc entry */
+ char *acpiget;/* name of the ACPI get function */
+ char *acpiset;/* name of the ACPI get function */
+ int min; /* minimum allowed value or -1 */
+ int max; /* maximum allowed value or -1 */
+ int value; /* current setting */
+ int valid; /* Has ever been set */
+ int debug; /* active only in debug mode ? */
+} sony_acpi_values[] = {
+ {
+ /* for backward compatibility only */
+ .name = "brightness",
+ .acpiget = "GBRT",
+ .acpiset = "SBRT",
+ .min = 1,
+ .max = SONY_MAX_BRIGHTNESS,
+ .debug = 0,
+ },
+ {
+ .name = "brightness_default",
+ .acpiget = "GPBR",
+ .acpiset = "SPBR",
+ .min = 1,
+ .max = SONY_MAX_BRIGHTNESS,
+ .debug = 0,
+ },
+ {
+ .name = "fnkey",
+ .acpiget = "GHKE",
+ .debug = 0,
+ },
+ {
+ .name = "cdpower",
+ .acpiget = "GCDP",
+ .acpiset = "SCDP",
+ .min = 0,
+ .max = 1,
+ .debug = 0,
+ },
+ {
+ .name = "cdpower",
+ .acpiget = "GCDP",
+ .acpiset = "CDPW",
+ .min = 0,
+ .max = 1,
+ .debug = 0,
+ },
+ {
+ .name = "audiopower",
+ .acpiget = "GAZP",
+ .acpiset = "AZPW",
+ .min = 0,
+ .max = 1,
+ .debug = 0,
+ },
+ {
+ .name = "lanpower",
+ .acpiget = "GLNP",
+ .acpiset = "LNPW",
+ .min = 0,
+ .max = 1,
+ .debug = 1,
+ },
+ {
+ .name = "PID",
+ .acpiget = "GPID",
+ .debug = 1,
+ },
+ {
+ .name = "CTR",
+ .acpiget = "GCTR",
+ .acpiset = "SCTR",
+ .min = -1,
+ .max = -1,
+ .debug = 1,
+ },
+ {
+ .name = "PCR",
+ .acpiget = "GPCR",
+ .acpiset = "SPCR",
+ .min = -1,
+ .max = -1,
+ .debug = 1,
+ },
+ {
+ .name = "CMI",
+ .acpiget = "GCMI",
+ .acpiset = "SCMI",
+ .min = -1,
+ .max = -1,
+ .debug = 1,
+ },
+ {
+ .name = NULL,
+ }
+};
+
+static int acpi_callgetfunc(acpi_handle handle, char *name, int *result)
+{
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+ acpi_status status;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+
+ status = acpi_evaluate_object(handle, name, NULL, &output);
+ if ((status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER)) {
+ *result = out_obj.integer.value;
+ return 0;
+ }
+
+ printk(LOG_PFX "acpi_callreadfunc failed\n");
+
+ return -1;
+}
+
+static int acpi_callsetfunc(acpi_handle handle, char *name, int value,
+ int *result)
+{
+ struct acpi_object_list params;
+ union acpi_object in_obj;
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+ acpi_status status;
+
+ params.count = 1;
+ params.pointer = &in_obj;
+ in_obj.type = ACPI_TYPE_INTEGER;
+ in_obj.integer.value = value;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+
+ status = acpi_evaluate_object(handle, name, &params, &output);
+ if (status == AE_OK) {
+ if (result != NULL) {
+ if (out_obj.type != ACPI_TYPE_INTEGER) {
+ printk(LOG_PFX "acpi_evaluate_object bad "
+ "return type\n");
+ return -1;
+ }
+ *result = out_obj.integer.value;
+ }
+ return 0;
+ }
+
+ printk(LOG_PFX "acpi_evaluate_object failed\n");
+
+ return -1;
+}
+
+static int parse_buffer(const char __user *buffer, unsigned long count,
+ int *val) {
+ char s[32];
+ int ret;
+
+ if (count > 31)
+ return -EINVAL;
+ if (copy_from_user(s, buffer, count))
+ return -EFAULT;
+ s[count] = '\0';
+ ret = simple_strtoul(s, NULL, 10);
+ *val = ret;
+ return 0;
+}
+
+static int sony_acpi_read(char* page, char** start, off_t off, int count,
+ int* eof, void *data)
+{
+ struct sony_acpi_value *item = data;
+ int value;
+
+ if (!item->acpiget)
+ return -EIO;
+
+ if (acpi_callgetfunc(sony_acpi_handle, item->acpiget, &value) < 0)
+ return -EIO;
+
+ return sprintf(page, "%d\n", value);
+}
+
+static int sony_acpi_write(struct file *file, const char __user *buffer,
+ unsigned long count, void *data)
+{
+ struct sony_acpi_value *item = data;
+ int result;
+ int value;
+
+ if (!item->acpiset)
+ return -EIO;
+
+ if ((result = parse_buffer(buffer, count, &value)) < 0)
+ return result;
+
+ if (item->min != -1 && value < item->min)
+ return -EINVAL;
+ if (item->max != -1 && value > item->max)
+ return -EINVAL;
+
+ if (acpi_callsetfunc(sony_acpi_handle, item->acpiset, value, NULL) < 0)
+ return -EIO;
+ item->value = value;
+ item->valid = 1;
+ return count;
+}
+
+static int sony_acpi_resume(struct acpi_device *device)
+{
+ struct sony_acpi_value *item;
+
+ for (item = sony_acpi_values; item->name; item++) {
+ int ret;
+
+ if (!item->valid)
+ continue;
+ ret = acpi_callsetfunc(sony_acpi_handle, item->acpiset,
+ item->value, NULL);
+ if (ret < 0) {
+ printk("%s: %d\n", __FUNCTION__, ret);
+ break;
+ }
+ }
+ return 0;
+}
+
+static void sony_acpi_notify(acpi_handle handle, u32 event, void *data)
+{
+ if (debug)
+ printk(LOG_PFX "sony_acpi_notify, event: %d\n", event);
+ acpi_bus_generate_event(sony_acpi_acpi_device, 1, event);
+}
+
+static acpi_status sony_walk_callback(acpi_handle handle, u32 level,
+ void *context, void **return_value)
+{
+ struct acpi_namespace_node *node;
+ union acpi_operand_object *operand;
+
+ node = (struct acpi_namespace_node *) handle;
+ operand = (union acpi_operand_object *) node->object;
+
+ printk(LOG_PFX "method: name: %4.4s, args %X\n", node->name.ascii,
+ (u32) operand->method.param_count);
+
+ return AE_OK;
+}
+
+static int sony_acpi_add(struct acpi_device *device)
+{
+ acpi_status status;
+ int result;
+ acpi_handle handle;
+ mode_t proc_file_mode;
+ struct sony_acpi_value *item;
+
+ sony_acpi_acpi_device = device;
+
+ sony_acpi_handle = device->handle;
+
+ acpi_driver_data(device) = NULL;
+ acpi_device_dir(device) = sony_acpi_dir;
+
+ if (debug) {
+ status = acpi_walk_namespace(ACPI_TYPE_METHOD, sony_acpi_handle,
+ 1, sony_walk_callback, NULL, NULL);
+ if (ACPI_FAILURE(status)) {
+ printk(LOG_PFX "unable to walk acpi resources\n");
+ result = -ENODEV;
+ goto outwalk;
+ }
+ }
+
+ status = acpi_install_notify_handler(sony_acpi_handle,
+ ACPI_DEVICE_NOTIFY,
+ sony_acpi_notify,
+ NULL);
+ if (ACPI_FAILURE(status)) {
+ printk(LOG_PFX "unable to install notify handler\n");
+ result = -ENODEV;
+ goto outnotify;
+ }
+
+ if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle, "GBRT", &handle))) {
+ sony_backlight_device = backlight_device_register("sony", NULL,
+ NULL, &sony_backlight_properties);
+
+ if (IS_ERR(sony_backlight_device)) {
+ printk(LOG_PFX "unable to register backlight device\n");
+ sony_backlight_device = NULL;
+ }
+ else
+ sony_backlight_properties.brightness =
+ sony_backlight_get_brightness(sony_backlight_device);
+ }
+
+ for (item = sony_acpi_values; item->name; ++item) {
+ proc_file_mode = 0;
+
+ if (!debug && item->debug)
+ continue;
+
+ if (item->acpiget) {
+ if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
+ item->acpiget, &handle)))
+ continue;
+
+ proc_file_mode |= S_IRUSR;
+ }
+
+ if (item->acpiset) {
+ if (ACPI_FAILURE(acpi_get_handle(sony_acpi_handle,
+ item->acpiset, &handle)))
+ continue;
+
+ proc_file_mode |= S_IWUSR;
+ }
+
+ item->proc = create_proc_entry(item->name, proc_file_mode,
+ acpi_device_dir(device));
+ if (!item->proc) {
+ printk(LOG_PFX "unable to create proc entry\n");
+ result = -EIO;
+ goto outproc;
+ }
+
+ item->proc->read_proc = sony_acpi_read;
+ item->proc->write_proc = sony_acpi_write;
+ item->proc->data = item;
+ item->proc->owner = THIS_MODULE;
+ }
+
+ printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
+
+ return 0;
+
+outproc:
+ if (sony_backlight_device)
+ backlight_device_unregister(sony_backlight_device);
+
+ for (item = sony_acpi_values; item->name; ++item)
+ if (item->proc)
+ remove_proc_entry(item->name, acpi_device_dir(device));
+outnotify:
+ status = acpi_remove_notify_handler(sony_acpi_handle,
+ ACPI_DEVICE_NOTIFY,
+ sony_acpi_notify);
+ if (ACPI_FAILURE(status))
+ printk(LOG_PFX "unable to remove notify handler\n");
+outwalk:
+ return result;
+}
+
+static int sony_acpi_remove(struct acpi_device *device, int type)
+{
+ acpi_status status;
+ struct sony_acpi_value *item;
+
+ if (sony_backlight_device)
+ backlight_device_unregister(sony_backlight_device);
+
+ sony_acpi_acpi_device = NULL;
+
+ status = acpi_remove_notify_handler(sony_acpi_handle,
+ ACPI_DEVICE_NOTIFY,
+ sony_acpi_notify);
+ if (ACPI_FAILURE(status))
+ printk(LOG_PFX "unable to remove notify handler\n");
+
+ for (item = sony_acpi_values; item->name; ++item)
+ if (item->proc)
+ remove_proc_entry(item->name, acpi_device_dir(device));
+
+ printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
+
+ return 0;
+}
+
+static int sony_backlight_update_status(struct backlight_device *bd)
+{
+ return acpi_callsetfunc(sony_acpi_handle, "SBRT",
+ bd->props->brightness + 1,
+ NULL);
+}
+
+static int sony_backlight_get_brightness(struct backlight_device *bd)
+{
+ int value;
+
+ if (acpi_callgetfunc(sony_acpi_handle, "GBRT", &value))
+ return 0;
+ /* brightness levels are 1-based, while backlight ones are 0-based */
+ return value - 1;
+}
+
+static struct acpi_driver sony_acpi_driver = {
+ .name = ACPI_SNC_DRIVER_NAME,
+ .class = ACPI_SNC_CLASS,
+ .ids = ACPI_SNC_HID,
+ .ops = {
+ .add = sony_acpi_add,
+ .remove = sony_acpi_remove,
+ .resume = sony_acpi_resume,
+ },
+};
+
+static int __init sony_acpi_init(void)
+{
+ int result;
+
+ sony_acpi_dir = proc_mkdir("sony", acpi_root_dir);
+ if (!sony_acpi_dir) {
+ printk(LOG_PFX "unable to create /proc entry\n");
+ return -ENODEV;
+ }
+ sony_acpi_dir->owner = THIS_MODULE;
+
+ result = acpi_bus_register_driver(&sony_acpi_driver);
+ if (result < 0) {
+ remove_proc_entry("sony", acpi_root_dir);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+
+static void __exit sony_acpi_exit(void)
+{
+ acpi_bus_unregister_driver(&sony_acpi_driver);
+ remove_proc_entry("sony", acpi_root_dir);
+}
+
+module_init(sony_acpi_init);
+module_exit(sony_acpi_exit);
--
1.5.0.rc4.345.gb4d2