/* * ACPI Sony Notebook Control Driver (SNC) * * Copyright (C) 2004-2005 Stelian Pop * * 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 #include #include #include #include #include #include #include #include #include #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 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[] = { { .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 = -1, .max = -1, .debug = 0, }, { .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, ¶ms, &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) { printk(LOG_PFX "sony_acpi_notify\n"); } 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; struct sony_acpi_value *item; 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, &sony_backlight_properties); if (IS_ERR(sony_backlight_device)) { printk(LOG_PFX "unable to register backlight device\n"); } } for (item = sony_acpi_values; item->name; ++item) { if (!debug && item->debug) continue; if (item->acpiget && ACPI_FAILURE(acpi_get_handle(sony_acpi_handle, item->acpiget, &handle))) continue; if (item->acpiset && ACPI_FAILURE(acpi_get_handle(sony_acpi_handle, item->acpiset, &handle))) continue; item->proc = create_proc_entry(item->name, 0600, 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 (debug) { 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"); } outnotify: for (item = sony_acpi_values; item->name; ++item) if (item->proc) remove_proc_entry(item->name, acpi_device_dir(device)); 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); if (debug) { 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);