1 files changed, 562 insertions, 0 deletions

diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c
new file mode 100644
index 000000000000..cabbed0015e4
--- /dev/null
+++ b/drivers/misc/sony-laptop.c
@@ -0,0 +1,562 @@
+/*
+ * ACPI Sony Notebook Control Driver (SNC)
+ *
+ * Copyright (C) 2004-2005 Stelian Pop <stelian@popies.net>
+ * Copyright (C) 2007 Mattia Dongili <malattia@linux.it>
+ *
+ * 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/platform_device.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 v0.4"
+
+/* 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-laptop: "
+
+MODULE_AUTHOR("Stelian Pop, Mattia Dongili");
+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 ssize_t sony_acpi_show(struct device *, struct device_attribute *,
+                              char *);
+static ssize_t sony_acpi_store(struct device *, struct device_attribute *,
+                               const char *, size_t);
+static int boolean_validate(const int, const int);
+static int brightness_default_validate(const int, const int);
+
+#define SNC_VALIDATE_IN         0
+#define SNC_VALIDATE_OUT        1
+
+struct sony_acpi_value {
+        char *name;             /* name of the entry */
+        char **acpiget;         /* names of the ACPI get function */
+        char **acpiset;         /* names of the ACPI set function */
+        int (*validate)(const int, const int);  /* input/output validation */
+        int value;              /* current setting */
+        int valid;              /* Has ever been set */
+        int debug;              /* active only in debug mode ? */
+        struct device_attribute devattr;        /* sysfs atribute */
+};
+
+#define HANDLE_NAMES(_name, _values...) \
+        static char *snc_##_name[] = { _values, NULL }
+
+#define SONY_ACPI_VALUE(_name, _getters, _setters, _validate, _debug) \
+        { \
+                .name           = __stringify(_name), \
+                .acpiget        = _getters, \
+                .acpiset        = _setters, \
+                .validate       = _validate, \
+                .debug          = _debug, \
+                .devattr        = __ATTR(_name, 0, sony_acpi_show, sony_acpi_store), \
+        }
+
+#define SONY_ACPI_VALUE_NULL    { .name = NULL }
+
+HANDLE_NAMES(fnkey_get, "GHKE");
+
+HANDLE_NAMES(brightness_def_get, "GPBR");
+HANDLE_NAMES(brightness_def_set, "SPBR");
+
+HANDLE_NAMES(cdpower_get, "GCDP");
+HANDLE_NAMES(cdpower_set, "SCDP", "CDPW");
+
+HANDLE_NAMES(audiopower_get, "GAZP");
+HANDLE_NAMES(audiopower_set, "AZPW");
+
+HANDLE_NAMES(lanpower_get, "GLNP");
+HANDLE_NAMES(lanpower_set, "LNPW");
+
+HANDLE_NAMES(PID_get, "GPID");
+
+HANDLE_NAMES(CTR_get, "GCTR");
+HANDLE_NAMES(CTR_set, "SCTR");
+
+HANDLE_NAMES(PCR_get, "GPCR");
+HANDLE_NAMES(PCR_set, "SPCR");
+
+HANDLE_NAMES(CMI_get, "GCMI");
+HANDLE_NAMES(CMI_set, "SCMI");
+
+static struct sony_acpi_value sony_acpi_values[] = {
+        SONY_ACPI_VALUE(brightness_default, snc_brightness_def_get,
+                        snc_brightness_def_set, brightness_default_validate, 0),
+        SONY_ACPI_VALUE(fnkey, snc_fnkey_get, NULL, NULL, 0),
+        SONY_ACPI_VALUE(cdpower, snc_cdpower_get, snc_cdpower_set, boolean_validate, 0),
+        SONY_ACPI_VALUE(audiopower, snc_audiopower_get, snc_audiopower_set,
+                        boolean_validate, 0),
+        SONY_ACPI_VALUE(lanpower, snc_lanpower_get, snc_lanpower_set,
+                        boolean_validate, 1),
+        /* unknown methods */
+        SONY_ACPI_VALUE(PID, snc_PID_get, NULL, NULL, 1),
+        SONY_ACPI_VALUE(CTR, snc_CTR_get, snc_CTR_set, NULL, 1),
+        SONY_ACPI_VALUE(PCR, snc_PCR_get, snc_PCR_set, NULL, 1),
+        SONY_ACPI_VALUE(CMI, snc_CMI_get, snc_CMI_set, NULL, 1),
+        SONY_ACPI_VALUE_NULL
+};
+
+static acpi_handle sony_acpi_handle;
+static struct acpi_device *sony_acpi_acpi_device = NULL;
+
+/*
+ * acpi_evaluate_object wrappers
+ */
+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;
+}
+
+/*
+ * sony_acpi_values input/output validate functions
+ */
+
+/* brightness_default_validate:
+ *
+ * manipulate input output values to keep consistency with the
+ * backlight framework for which brightness values are 0-based.
+ */
+static int brightness_default_validate(const int direction, const int value)
+{
+        switch (direction) {
+                case SNC_VALIDATE_OUT:
+                        return value - 1;
+                case SNC_VALIDATE_IN:
+                        if (value >= 0 && value < SONY_MAX_BRIGHTNESS)
+                                return value + 1;
+        }
+        return -EINVAL;
+}
+
+/* boolean_validate:
+ *
+ * on input validate boolean values 0/1, on output just pass the
+ * received value.
+ */
+static int boolean_validate(const int direction, const int value)
+{
+        if (direction == SNC_VALIDATE_IN) {
+                if (value != 0 && value != 1)
+                        return -EINVAL;
+        }
+        return value;
+}
+
+/*
+ * Sysfs show/store common to all sony_acpi_values
+ */
+static ssize_t sony_acpi_show(struct device *dev, struct device_attribute *attr,
+                              char *buffer)
+{
+        int value;
+        struct sony_acpi_value *item =
+            container_of(attr, struct sony_acpi_value, devattr);
+
+        if (!*item->acpiget)
+                return -EIO;
+
+        if (acpi_callgetfunc(sony_acpi_handle, *item->acpiget, &value) < 0)
+                return -EIO;
+
+        if (item->validate)
+                value = item->validate(SNC_VALIDATE_OUT, value);
+
+        return snprintf(buffer, PAGE_SIZE, "%d\n", value);
+}
+
+static ssize_t sony_acpi_store(struct device *dev,
+                               struct device_attribute *attr,
+                               const char *buffer, size_t count)
+{
+        int value;
+        struct sony_acpi_value *item =
+            container_of(attr, struct sony_acpi_value, devattr);
+
+        if (!item->acpiset)
+                return -EIO;
+
+        if (count > 31)
+                return -EINVAL;
+
+        value = simple_strtoul(buffer, NULL, 10);
+
+        if (item->validate)
+                value = item->validate(SNC_VALIDATE_IN, value);
+
+        if (value < 0)
+                return value;
+
+        if (acpi_callsetfunc(sony_acpi_handle, *item->acpiset, value, NULL) < 0)
+                return -EIO;
+        item->value = value;
+        item->valid = 1;
+        return count;
+}
+
+/*
+ * Platform device
+ */
+static struct platform_driver sncpf_driver = {
+        .driver = {
+                   .name = "sony-laptop",
+                   .owner = THIS_MODULE,
+                   }
+};
+static struct platform_device *sncpf_device;
+
+static int sony_snc_pf_add(void)
+{
+        acpi_handle handle;
+        struct sony_acpi_value *item;
+        int ret = 0;
+
+        ret = platform_driver_register(&sncpf_driver);
+        if (ret)
+                goto out;
+
+        sncpf_device = platform_device_alloc("sony-laptop", -1);
+        if (!sncpf_device) {
+                ret = -ENOMEM;
+                goto out_platform_registered;
+        }
+
+        ret = platform_device_add(sncpf_device);
+        if (ret)
+                goto out_platform_alloced;
+
+        for (item = sony_acpi_values; item->name; ++item) {
+
+                if (!debug && item->debug)
+                        continue;
+
+                /* find the available acpiget as described in the DSDT */
+                for (; item->acpiget && *item->acpiget; ++item->acpiget) {
+                        if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle,
+                                                         *item->acpiget,
+                                                         &handle))) {
+                                if (debug)
+                                        printk(LOG_PFX "Found %s getter: %s\n",
+                                               item->name, *item->acpiget);
+                                item->devattr.attr.mode |= S_IRUGO;
+                                break;
+                        }
+                }
+
+                /* find the available acpiset as described in the DSDT */
+                for (; item->acpiset && *item->acpiset; ++item->acpiset) {
+                        if (ACPI_SUCCESS(acpi_get_handle(sony_acpi_handle,
+                                                         *item->acpiset,
+                                                         &handle))) {
+                                if (debug)
+                                        printk(LOG_PFX "Found %s setter: %s\n",
+                                               item->name, *item->acpiset);
+                                item->devattr.attr.mode |= S_IWUSR;
+                                break;
+                        }
+                }
+
+                if (item->devattr.attr.mode != 0) {
+                        ret =
+                            device_create_file(&sncpf_device->dev,
+                                               &item->devattr);
+                        if (ret)
+                                goto out_sysfs;
+                }
+        }
+
+        return 0;
+
+      out_sysfs:
+        for (item = sony_acpi_values; item->name; ++item) {
+                device_remove_file(&sncpf_device->dev, &item->devattr);
+        }
+        platform_device_del(sncpf_device);
+      out_platform_alloced:
+        platform_device_put(sncpf_device);
+      out_platform_registered:
+        platform_driver_unregister(&sncpf_driver);
+      out:
+        return ret;
+}
+
+static void sony_snc_pf_remove(void)
+{
+        struct sony_acpi_value *item;
+
+        for (item = sony_acpi_values; item->name; ++item) {
+                device_remove_file(&sncpf_device->dev, &item->devattr);
+        }
+
+        platform_device_del(sncpf_device);
+        platform_device_put(sncpf_device);
+        platform_driver_unregister(&sncpf_driver);
+}
+
+/*
+ * Backlight device
+ */
+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 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,
+};
+
+/*
+ * ACPI callbacks
+ */
+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;
+}
+
+/*
+ * ACPI device
+ */
+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 int sony_acpi_add(struct acpi_device *device)
+{
+        acpi_status status;
+        int result;
+        acpi_handle handle;
+
+        sony_acpi_acpi_device = device;
+
+        sony_acpi_handle = device->handle;
+
+        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 outwalk;
+        }
+
+        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);
+        }
+
+        if (sony_snc_pf_add())
+                goto outbacklight;
+
+        printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully installed\n");
+
+        return 0;
+
+      outbacklight:
+        if (sony_backlight_device)
+                backlight_device_unregister(sony_backlight_device);
+
+        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;
+
+        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");
+
+        sony_snc_pf_remove();
+
+        printk(KERN_INFO ACPI_SNC_DRIVER_NAME " successfully removed\n");
+
+        return 0;
+}
+
+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)
+{
+        return acpi_bus_register_driver(&sony_acpi_driver);
+}
+
+static void __exit sony_acpi_exit(void)
+{
+        acpi_bus_unregister_driver(&sony_acpi_driver);
+}
+
+module_init(sony_acpi_init);
+module_exit(sony_acpi_exit);