/* * Panasonic HotKey and lcd brightness control Extra driver * (C) 2004 Hiroshi Miura * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ * (C) YOKOTA Hiroshi * (C) 2004 David Bronaugh * * derived from toshiba_acpi.c, Copyright (C) 2002-2004 John Belmonte * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * publicshed by the Free Software Foundation. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * *--------------------------------------------------------------------------- * * ChangeLog: * * Nov.04, 2006 Hiroshi Miura * -v0.9 remove warning about section reference. * remove acpi_os_free * add /proc/acpi/pcc/brightness interface to * allow HAL to access. * merge dbronaugh's enhancement * Aug.17, 2004 David Bronaugh (dbronaugh) * - Added screen brightness setting interface * Thanks to the FreeBSD crew * (acpi_panasonic.c authors) * for the ideas I needed to accomplish it * * May.29, 2006 Hiroshi Miura * -v0.8.4 follow to change keyinput structure * thanks Fabian Yamaguchi , * Jacob Bower and * Hiroshi Yokota for providing solutions. * * Oct.02, 2004 Hiroshi Miura * -v0.8.2 merge code of YOKOTA Hiroshi * . * Add sticky key mode interface. * Refactoring acpi_pcc_generete_keyinput(). * * Sep.15, 2004 Hiroshi Miura * -v0.8 Generate key input event on input subsystem. * This is based on yet another driver * written by Ryuta Nakanishi. * * Sep.10, 2004 Hiroshi Miura * -v0.7 Change proc interface functions using seq_file * facility as same as other ACPI drivers. * * Aug.28, 2004 Hiroshi Miura * -v0.6.4 Fix a silly error with status checking * * Aug.25, 2004 Hiroshi Miura * -v0.6.3 replace read_acpi_int by standard * function acpi_evaluate_integer * some clean up and make smart copyright notice. * fix return value of pcc_acpi_get_key() * fix checking return value of acpi_bus_register_driver() * * Aug.22, 2004 David Bronaugh * -v0.6.2 Add check on ACPI data (num_sifr) * Coding style cleanups, better error messages/handling * Fixed an off-by-one error in memory allocation * * Aug.21, 2004 David Bronaugh * -v0.6.1 Fix a silly error with status checking * * Aug.20, 2004 David Bronaugh * - v0.6 Correct brightness controls to reflect reality * based on information gleaned by Hiroshi Miura * and discussions with Hiroshi Miura * * Aug.10, 2004 Hiroshi Miura * - v0.5 support LCD brightness control * based on the disclosed information by MEI. * * Jul.25, 2004 Hiroshi Miura * - v0.4 first post version * add function to retrive SIFR * * Jul.24, 2004 Hiroshi Miura * - v0.3 get proper status of hotkey * * Jul.22, 2004 Hiroshi Miura * - v0.2 add HotKey handler * * Jul.17, 2004 Hiroshi Miura * - v0.1 start from toshiba_acpi driver written by John Belmonte * */ #define ACPI_PCC_VERSION "0.9+hy" #include #include #include #include #include #include #include #include #include #include #include #include /************************************************************************* * "seq" file template definition. */ /* "seq" initializer */ #define SEQ_OPEN_FS(_open_func_name_, _show_func_name_) \ static int _open_func_name_(struct inode *inode, struct file *file) \ { \ return single_open(file, _show_func_name_, PDE(inode)->data); \ } /*------------------------------------------------------------------------- * "seq" fops template for read-only files. */ #define SEQ_FILEOPS_R(_open_func_name_) \ { \ .open = _open_func_name_, \ .read = seq_read, \ .llseek = seq_lseek, \ .release = single_release, \ } /*------------------------------------------------------------------------ * "seq" fops template for read-write files. */ #define SEQ_FILEOPS_RW(_open_func_name_, _write_func_name_) \ { \ .open = _open_func_name_ , \ .read = seq_read, \ .write = _write_func_name_, \ .llseek = seq_lseek, \ .release = single_release, \ } /* * "seq" file template definition ended. *************************************************************************** */ #ifndef ACPI_HOTKEY_COMPONENT #define ACPI_HOTKEY_COMPONENT 0x10000000 #endif #define _COMPONENT ACPI_HOTKEY_COMPONENT ACPI_MODULE_NAME("pcc_acpi"); MODULE_AUTHOR("Hiroshi Miura, Hiroshi Yokota"); MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Let's Note laptops"); MODULE_LICENSE("GPL"); #define LOGPREFIX "pcc_acpi: " /**************************************************** * Define ACPI PATHs ****************************************************/ /* Lets note hotkeys */ #define METHOD_HKEY_QUERY "HINF" #define METHOD_HKEY_SQTY "SQTY" #define METHOD_HKEY_SINF "SINF" #define METHOD_HKEY_SSET "SSET" #define HKEY_NOTIFY 0x80 /* for brightness control */ #define LCD_MAX_BRIGHTNESS 255 /* This may be magical -- beware */ #define LCD_BRIGHTNESS_INCREMENT 17 /* Registers of SINF */ #define SINF_LCD_BRIGHTNESS 4 /******************************************************************* * * definitions for /proc/ interface * *******************************************************************/ #define ACPI_PCC_DRIVER_NAME "pcc_acpi" #define ACPI_PCC_DEVICE_NAME "PCCExtra" #define ACPI_PCC_CLASS "pcc" #define PROC_PCC ACPI_PCC_CLASS #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" /* This is transitional definition */ #ifndef KEY_BATT # define KEY_BATT 227 #endif #define PROC_STR_MAX_LEN 8 #define BUS_PCC_HOTKEY BUS_I8042 /*0x1a*/ /* FIXME: BUS_I8042? */ /* Fn+F4/F5 confricts with Shift+F1/F2 */ /* This hack avoids key number confrict */ #define PCC_KEYINPUT_MODE (0) /* LCD_TYPEs: 0 = Normal, 1 = Semi-transparent ENV_STATEs: Normal temp=0x01, High temp=0x81, N/A=0x00 */ enum SINF_BITS { SINF_NUM_BATTERIES = 0, SINF_LCD_TYPE, SINF_AC_MAX_BRIGHT, SINF_AC_MIN_BRIGHT, SINF_AC_CUR_BRIGHT, /* 4 = R1 only handle SINF_AC_CUR_BRIGHT * as SINF_CUR_BRIGHT and don't know AC state */ SINF_DC_MAX_BRIGHT, SINF_DC_MIN_BRIGHT, SINF_DC_CUR_BRIGHT, SINF_MUTE, SINF_RESERVED, SINF_ENV_STATE, /* 10 */ SINF_STICKY_KEY = 0x80, }; static struct acpi_device_id pcc_device_ids[] = { {"MAT0012", 0}, {"MAT0013", 0}, {"MAT0018", 0}, {"MAT0019", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, pcc_device_ids); static int __devinit acpi_pcc_hotkey_add(struct acpi_device *device); static int __devexit acpi_pcc_hotkey_remove(struct acpi_device *device, int type); static int acpi_pcc_hotkey_resume(struct acpi_device *device); static struct acpi_driver acpi_pcc_driver = { .name = ACPI_PCC_DRIVER_NAME, .class = ACPI_PCC_CLASS, .ids = pcc_device_ids, .ops = { .add = acpi_pcc_hotkey_add, .remove = __devexit_p(acpi_pcc_hotkey_remove), #ifdef CONFIG_PM /*.suspend = acpi_pcc_hotkey_suspend,*/ .resume = acpi_pcc_hotkey_resume, #endif }, }; struct acpi_hotkey { acpi_handle handle; struct acpi_device *device; struct proc_dir_entry *proc_dir_entry; unsigned long num_sifr; unsigned long status; struct input_dev *input_dev; int sticky_mode; }; struct pcc_keyinput { struct acpi_hotkey *hotkey; int key_mode; }; /* ************************************************************************* Hotkey driver core ************************************************************************* */ /* ------------------------------------------------------------------------- method access functions ------------------------------------------------------------------------- */ static int acpi_pcc_write_sset(struct acpi_hotkey *hotkey, int func, int val) { union acpi_object in_objs[] = { { .integer.type = ACPI_TYPE_INTEGER, .integer.value = func, }, { .integer.type = ACPI_TYPE_INTEGER, .integer.value = val, }, }; struct acpi_object_list params = { .count = ARRAY_SIZE(in_objs), .pointer = in_objs, }; acpi_status status; ACPI_FUNCTION_TRACE("acpi_pcc_write_sset"); status = acpi_evaluate_object(hotkey->handle, METHOD_HKEY_SSET, ¶ms, NULL); return_VALUE(status == AE_OK ? AE_OK : AE_ERROR); } static inline int acpi_pcc_get_sqty(struct acpi_device *device) { unsigned long s; acpi_status status; ACPI_FUNCTION_TRACE("acpi_pcc_get_sqty"); status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, NULL, &s); if (ACPI_SUCCESS(status)) { return_VALUE(s); } else { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "evaluation error HKEY.SQTY\n")); return_VALUE(-EINVAL); } } static int acpi_pcc_retrieve_biosdata(struct acpi_hotkey *hotkey, u32 *sinf) { acpi_status status; struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; union acpi_object *hkey = NULL; int i; ACPI_FUNCTION_TRACE("acpi_pcc_retrieve_biosdata"); status = acpi_evaluate_object(hotkey->handle, METHOD_HKEY_SINF, 0, &buffer); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "evaluation error HKEY.SINF\n")); status = AE_ERROR; return_VALUE(status); } hkey = buffer.pointer; if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n")); goto free_buffer; } if (hotkey->num_sifr < hkey->package.count) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "SQTY reports bad SINF length\n")); status = AE_ERROR; goto free_buffer; } for (i = 0; i < hkey->package.count; i++) { union acpi_object *element = &(hkey->package.elements[i]); if (likely(element->type == ACPI_TYPE_INTEGER)) { sinf[i] = element->integer.value; } else { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF data\n")); status = AE_ERROR; break; } } sinf[hkey->package.count] = -1; free_buffer: kfree(buffer.pointer); return_VALUE(status == AE_OK ? AE_OK : AE_ERROR); } static int acpi_pcc_read_sinf_field(struct seq_file *seq, int field) { struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private; u32 sinf[hotkey->num_sifr + 1]; ACPI_FUNCTION_TRACE("acpi_pcc_read_sinf_field"); if (ACPI_SUCCESS(acpi_pcc_retrieve_biosdata(hotkey, sinf))) seq_printf(seq, "%u\n", sinf[field]); else ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't retrieve BIOS data\n")); return_VALUE(AE_OK); } /* ------------------------------------------------------------------------- user interface functions ------------------------------------------------------------------------- */ /* read methods */ /* Sinf read methods */ #define PCC_SINF_READ_F(_name_, FUNC) \ static int _name_(struct seq_file *seq, void *offset) \ { \ return_VALUE(ACPI_SUCCESS(acpi_pcc_read_sinf_field(seq, \ (FUNC))) \ ? 0 : -EINVAL); \ } PCC_SINF_READ_F(acpi_pcc_numbatteries_show, SINF_NUM_BATTERIES); PCC_SINF_READ_F(acpi_pcc_lcdtype_show, SINF_LCD_TYPE); PCC_SINF_READ_F(acpi_pcc_ac_brightness_max_show, SINF_AC_MAX_BRIGHT); PCC_SINF_READ_F(acpi_pcc_ac_brightness_min_show, SINF_AC_MIN_BRIGHT); PCC_SINF_READ_F(acpi_pcc_ac_brightness_show, SINF_AC_CUR_BRIGHT); PCC_SINF_READ_F(acpi_pcc_dc_brightness_max_show, SINF_DC_MAX_BRIGHT); PCC_SINF_READ_F(acpi_pcc_dc_brightness_min_show, SINF_DC_MIN_BRIGHT); PCC_SINF_READ_F(acpi_pcc_dc_brightness_show, SINF_DC_CUR_BRIGHT); PCC_SINF_READ_F(acpi_pcc_brightness_show, SINF_AC_CUR_BRIGHT); PCC_SINF_READ_F(acpi_pcc_mute_show, SINF_MUTE); static int acpi_pcc_sticky_key_show(struct seq_file *seq, void *offset) { struct acpi_hotkey *hotkey = seq->private; ACPI_FUNCTION_TRACE("acpi_pcc_sticky_key_show"); if (!hotkey || !hotkey->device) return_VALUE(-EINVAL); seq_printf(seq, "%d\n", hotkey->sticky_mode); return_VALUE(0); } static int acpi_pcc_keyinput_show(struct seq_file *seq, void *offset) { struct acpi_hotkey *hotkey = seq->private; struct input_dev *hotk_input_dev = hotkey->input_dev; struct pcc_keyinput *keyinput = input_get_drvdata(hotk_input_dev); ACPI_FUNCTION_TRACE("acpi_pcc_keyinput_show"); seq_printf(seq, "%d\n", keyinput->key_mode); return_VALUE(0); } static int acpi_pcc_version_show(struct seq_file *seq, void *offset) { struct acpi_hotkey *hotkey = seq->private; ACPI_FUNCTION_TRACE("acpi_pcc_version_show"); if (!hotkey || !hotkey->device) return_VALUE(-EINVAL); seq_printf(seq, "%s version %s\n", ACPI_PCC_DRIVER_NAME, ACPI_PCC_VERSION); seq_printf(seq, "%li functions\n", hotkey->num_sifr); return_VALUE(0); } /* write methods */ static ssize_t acpi_pcc_write_single_flag(struct file *file, const char __user *buffer, size_t count, int sinf_func) { struct seq_file *seq = file->private_data; struct acpi_hotkey *hotkey = seq->private; char write_string[PROC_STR_MAX_LEN]; u32 val; ACPI_FUNCTION_TRACE("acpi_pcc_write_single_flag"); if (!hotkey || (count > sizeof(write_string) - 1)) return_VALUE(-EINVAL); if (copy_from_user(write_string, buffer, count)) return_VALUE(-EFAULT); write_string[count] = '\0'; if ((sscanf(write_string, "%3i", &val) == 1) && (val == 0 || val == 1)) acpi_pcc_write_sset(hotkey, sinf_func, val); return_VALUE(count); } static unsigned long acpi_pcc_write_brightness(struct file *file, const char __user *buffer, size_t count, int min_index, int max_index, int cur_index) { struct seq_file *seq = (struct seq_file *)file->private_data; struct acpi_hotkey *hotkey = (struct acpi_hotkey *)seq->private; char write_string[PROC_STR_MAX_LEN]; u32 bright; u32 sinf[hotkey->num_sifr + 1]; ACPI_FUNCTION_TRACE("acpi_pcc_write_brightness"); if (!hotkey || (count > sizeof(write_string) - 1)) return_VALUE(-EINVAL); if (copy_from_user(write_string, buffer, count)) return_VALUE(-EFAULT); write_string[count] = '\0'; if (ACPI_FAILURE(acpi_pcc_retrieve_biosdata(hotkey, sinf))) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't retrieve BIOS data\n")); goto end; } if ((sscanf(write_string, "%4i", &bright) == 1) && (bright >= sinf[min_index]) && (bright <= sinf[max_index])) acpi_pcc_write_sset(hotkey, cur_index, bright); end: return_VALUE(count); } static ssize_t acpi_pcc_write_ac_brightness(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { return_VALUE(acpi_pcc_write_brightness(file, buffer, count, SINF_AC_MIN_BRIGHT, SINF_AC_MAX_BRIGHT, SINF_AC_CUR_BRIGHT)); } static ssize_t acpi_pcc_write_dc_brightness(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { return_VALUE(acpi_pcc_write_brightness(file, buffer, count, SINF_DC_MIN_BRIGHT, SINF_DC_MAX_BRIGHT, SINF_DC_CUR_BRIGHT)); } static ssize_t acpi_pcc_write_no_brightness(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { return acpi_pcc_write_brightness(file, buffer, count, SINF_AC_MIN_BRIGHT, SINF_AC_MAX_BRIGHT, SINF_AC_CUR_BRIGHT); } static ssize_t acpi_pcc_write_mute(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { return_VALUE(acpi_pcc_write_single_flag(file, buffer, count, SINF_MUTE)); } static ssize_t acpi_pcc_write_sticky_key(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { struct seq_file *seq = (struct seq_file *)file->private_data; struct acpi_hotkey *hotkey = (struct acpi_hotkey *)seq->private; char write_string[PROC_STR_MAX_LEN]; int mode; ACPI_FUNCTION_TRACE("acpi_pcc_write_sticky_key"); if (!hotkey || (count > sizeof(write_string) - 1)) return_VALUE(-EINVAL); if (copy_from_user(write_string, buffer, count)) return_VALUE(-EFAULT); write_string[count] = '\0'; if ((sscanf(write_string, "%3i", &mode) == 1) && (mode == 0 || mode == 1)) { acpi_pcc_write_sset(hotkey, SINF_STICKY_KEY, mode); hotkey->sticky_mode = mode; } return_VALUE(count); } static ssize_t acpi_pcc_write_keyinput(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { struct seq_file *seq = (struct seq_file *)file->private_data; struct acpi_hotkey *hotkey = (struct acpi_hotkey *)seq->private; struct pcc_keyinput *keyinput; char write_string[PROC_STR_MAX_LEN]; int key_mode; ACPI_FUNCTION_TRACE("acpi_pcc_write_keyinput"); if (!hotkey || (count > (sizeof(write_string) - 1))) return_VALUE(-EINVAL); if (copy_from_user(write_string, buffer, count)) return_VALUE(-EFAULT); write_string[count] = '\0'; if ((sscanf(write_string, "%4i", &key_mode) == 1) && (key_mode == 0 || key_mode == 1)) { keyinput = input_get_drvdata(hotkey->input_dev); keyinput->key_mode = key_mode; } return_VALUE(count); } /* ------------------------------------------------------------------------- hotkey driver ------------------------------------------------------------------------- */ static void acpi_pcc_generete_keyinput(struct acpi_hotkey *hotkey) { struct input_dev *hotk_input_dev = hotkey->input_dev; struct pcc_keyinput *keyinput = input_get_drvdata(hotk_input_dev); int hinf = hotkey->status; int key_code, hkey_num; const int key_map[] = { /* 0 */ -1, /* 1 */ KEY_BRIGHTNESSDOWN, /* 2 */ KEY_BRIGHTNESSUP, /* 3 */ -1, /* vga/lcd switch event is not occur on hotkey driver. */ /* 4 */ KEY_MUTE, /* 5 */ KEY_VOLUMEDOWN, /* 6 */ KEY_VOLUMEUP, /* 7 */ KEY_SLEEP, /* 8 */ -1, /* Change CPU boost: do nothing */ /* 9 */ KEY_BATT, /* 10 */ KEY_SUSPEND, }; ACPI_FUNCTION_TRACE("acpi_pcc_generete_keyinput"); if (keyinput->key_mode == 0) return_VOID; hkey_num = hinf & 0xf; if ((0 > hkey_num) || (hkey_num > ARRAY_SIZE(key_map))) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "hotkey number out of range: %d\n", hkey_num)); return_VOID; } key_code = key_map[hkey_num]; if (key_code != -1) { int pushed = (hinf & 0x80) ? TRUE : FALSE; input_report_key(hotk_input_dev, key_code, pushed); input_sync(hotk_input_dev); } } static int acpi_pcc_hotkey_get_key(struct acpi_hotkey *hotkey) { unsigned long result; acpi_status status = AE_OK; ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_get_key"); status = acpi_evaluate_integer(hotkey->handle, METHOD_HKEY_QUERY, NULL, &result); if (likely(ACPI_SUCCESS(status))) hotkey->status = result; else ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "error getting hotkey status\n")); return_VALUE(status == AE_OK); } void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data) { struct acpi_hotkey *hotkey = (struct acpi_hotkey *) data; ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_notify"); switch (event) { case HKEY_NOTIFY: if (acpi_pcc_hotkey_get_key(hotkey)) { /* generate event like '"pcc HKEY 00000080 00000084"' * when Fn+F4 pressed */ acpi_bus_generate_proc_event(hotkey->device, event, hotkey->status); } acpi_pcc_generete_keyinput(hotkey); break; default: /* nothing to do */ break; } return_VOID; } /* ************************************************************************* FS Interface (/proc) ************************************************************************* */ /* oepn proc file fs*/ SEQ_OPEN_FS(acpi_pcc_dc_brightness_open_fs, acpi_pcc_dc_brightness_show); SEQ_OPEN_FS(acpi_pcc_numbatteries_open_fs, acpi_pcc_numbatteries_show); SEQ_OPEN_FS(acpi_pcc_lcdtype_open_fs, acpi_pcc_lcdtype_show); SEQ_OPEN_FS(acpi_pcc_ac_brightness_max_open_fs, acpi_pcc_ac_brightness_max_show); SEQ_OPEN_FS(acpi_pcc_ac_brightness_min_open_fs, acpi_pcc_ac_brightness_min_show); SEQ_OPEN_FS(acpi_pcc_ac_brightness_open_fs, acpi_pcc_ac_brightness_show); SEQ_OPEN_FS(acpi_pcc_dc_brightness_max_open_fs, acpi_pcc_dc_brightness_max_show); SEQ_OPEN_FS(acpi_pcc_dc_brightness_min_open_fs, acpi_pcc_dc_brightness_min_show); SEQ_OPEN_FS(acpi_pcc_brightness_open_fs, acpi_pcc_brightness_show); SEQ_OPEN_FS(acpi_pcc_mute_open_fs, acpi_pcc_mute_show); SEQ_OPEN_FS(acpi_pcc_version_open_fs, acpi_pcc_version_show); SEQ_OPEN_FS(acpi_pcc_keyinput_open_fs, acpi_pcc_keyinput_show); SEQ_OPEN_FS(acpi_pcc_sticky_key_open_fs, acpi_pcc_sticky_key_show); static struct file_operations acpi_pcc_numbatteries_fops = SEQ_FILEOPS_R(acpi_pcc_numbatteries_open_fs); static struct file_operations acpi_pcc_lcdtype_fops = SEQ_FILEOPS_R(acpi_pcc_lcdtype_open_fs); static struct file_operations acpi_pcc_mute_fops = SEQ_FILEOPS_RW(acpi_pcc_mute_open_fs, acpi_pcc_write_mute); static struct file_operations acpi_pcc_ac_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_ac_brightness_open_fs, acpi_pcc_write_ac_brightness); static struct file_operations acpi_pcc_ac_brightness_max_fops = SEQ_FILEOPS_R(acpi_pcc_ac_brightness_max_open_fs); static struct file_operations acpi_pcc_ac_brightness_min_fops = SEQ_FILEOPS_R(acpi_pcc_ac_brightness_min_open_fs); static struct file_operations acpi_pcc_dc_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_dc_brightness_open_fs, acpi_pcc_write_dc_brightness); static struct file_operations acpi_pcc_dc_brightness_max_fops = SEQ_FILEOPS_R(acpi_pcc_dc_brightness_max_open_fs); static struct file_operations acpi_pcc_dc_brightness_min_fops = SEQ_FILEOPS_R(acpi_pcc_dc_brightness_min_open_fs); static struct file_operations acpi_pcc_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_brightness_open_fs, acpi_pcc_write_no_brightness); static struct file_operations acpi_pcc_sticky_key_fops = SEQ_FILEOPS_RW(acpi_pcc_sticky_key_open_fs, acpi_pcc_write_sticky_key); static struct file_operations acpi_pcc_keyinput_fops = SEQ_FILEOPS_RW(acpi_pcc_keyinput_open_fs, acpi_pcc_write_keyinput); static struct file_operations acpi_pcc_version_fops = SEQ_FILEOPS_R(acpi_pcc_version_open_fs); struct proc_item { const char *name; struct file_operations *fops; mode_t flag; }; /* Note: These functions map *exactly* to the SINF/SSET functions */ struct proc_item acpi_pcc_proc_items_sifr[] = { { "num_batteries", &acpi_pcc_numbatteries_fops, S_IRUGO }, { "lcd_type", &acpi_pcc_lcdtype_fops, S_IRUGO }, { "ac_brightness_max", &acpi_pcc_ac_brightness_max_fops, S_IRUGO }, { "ac_brightness_min", &acpi_pcc_ac_brightness_min_fops, S_IRUGO }, { "ac_brightness", &acpi_pcc_ac_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR }, { "dc_brightness_max", &acpi_pcc_dc_brightness_max_fops, S_IRUGO }, { "dc_brightness_min", &acpi_pcc_dc_brightness_min_fops, S_IRUGO }, { "dc_brightness", &acpi_pcc_dc_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR }, { "brightness", &acpi_pcc_brightness_fops, S_IFREG | S_IRUGO | S_IWUSR}, { "mute", &acpi_pcc_mute_fops, S_IFREG | S_IRUGO | S_IWUSR }, { NULL, NULL, 0 }, }; struct proc_item acpi_pcc_proc_items[] = { { "sticky_key", &acpi_pcc_sticky_key_fops, S_IFREG | S_IRUGO | S_IWUSR}, { "keyinput", &acpi_pcc_keyinput_fops, S_IFREG | S_IRUGO | S_IWUSR }, { "version", &acpi_pcc_version_fops, S_IRUGO }, { NULL, NULL, 0 }, }; static int __devinit acpi_pcc_add_device(struct acpi_device *device, struct proc_item *proc_items, int num) { struct acpi_hotkey *hotkey = acpi_driver_data(device); struct proc_dir_entry *proc; struct proc_item *item; int i; for (item = proc_items, i = 0; item->name && i < num; ++item, ++i) { proc = create_proc_entry(item->name, item->flag, hotkey->proc_dir_entry); if (likely(proc)) { proc->proc_fops = item->fops; proc->data = hotkey; proc->owner = THIS_MODULE; } else { while (i-- > 0) { item--; remove_proc_entry(item->name, hotkey->proc_dir_entry); } return_VALUE(-ENODEV); } } return_VALUE(0); } static int __devinit acpi_pcc_proc_init(struct acpi_device *device) { struct proc_dir_entry *acpi_pcc_dir; struct acpi_hotkey *hotkey = acpi_driver_data(device); acpi_status status; ACPI_FUNCTION_TRACE("acpi_pcc_proc_init"); acpi_pcc_dir = proc_mkdir(PROC_PCC, acpi_root_dir); if (unlikely(!acpi_pcc_dir)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't create dir in /proc\n")); return_VALUE(-ENODEV); } acpi_pcc_dir->owner = THIS_MODULE; hotkey->proc_dir_entry = acpi_pcc_dir; status = acpi_pcc_add_device(device, acpi_pcc_proc_items_sifr, hotkey->num_sifr); status |= acpi_pcc_add_device(device, acpi_pcc_proc_items, ARRAY_SIZE(acpi_pcc_proc_items)); if (unlikely(status)) { remove_proc_entry(PROC_PCC, acpi_root_dir); hotkey->proc_dir_entry = NULL; return_VALUE(-ENODEV); } return_VALUE(status); } static void __devexit acpi_pcc_remove_device(struct acpi_device *device, struct proc_item *proc_items, int num) { struct acpi_hotkey *hotkey = acpi_driver_data(device); struct proc_item *item; int i; for (item = proc_items, i = 0; item->name != NULL && i < num; ++item, ++i) { remove_proc_entry(item->name, hotkey->proc_dir_entry); } return_VOID; } /* ************************************************************************* Power Management ************************************************************************* */ #ifdef CONFIG_PM static int acpi_pcc_hotkey_resume(struct acpi_device *device) { struct acpi_hotkey *hotkey = acpi_driver_data(device); acpi_status status = AE_OK; ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_resume"); if (device == NULL || hotkey == NULL) return_VALUE(-EINVAL); if (hotkey->num_sifr != 0) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Sticky mode restore: %d\n", hotkey->sticky_mode)); status = acpi_pcc_write_sset(hotkey, SINF_STICKY_KEY, hotkey->sticky_mode); } if (status != AE_OK) return_VALUE(-EINVAL); return_VALUE(0); } #endif /* ************************************************************************* Module init/remove ************************************************************************* */ /* ------------------------------------------------------------------------- input ------------------------------------------------------------------------- */ static int __devinit acpi_pcc_init_input(struct acpi_hotkey *hotkey) { struct input_dev *hotk_input_dev; struct pcc_keyinput *pcc_keyinput; int error; ACPI_FUNCTION_TRACE("acpi_pcc_init_input"); hotk_input_dev = input_allocate_device(); if (hotk_input_dev == NULL) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate input device for hotkey")); goto err_input; } pcc_keyinput = kcalloc(1, sizeof(struct pcc_keyinput), GFP_KERNEL); if (pcc_keyinput == NULL) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for private data")); goto err_pcc; } hotk_input_dev->evbit[0] = BIT(EV_KEY); set_bit(KEY_BRIGHTNESSDOWN, hotk_input_dev->keybit); set_bit(KEY_BRIGHTNESSUP, hotk_input_dev->keybit); set_bit(KEY_MUTE, hotk_input_dev->keybit); set_bit(KEY_VOLUMEDOWN, hotk_input_dev->keybit); set_bit(KEY_VOLUMEUP, hotk_input_dev->keybit); set_bit(KEY_SLEEP, hotk_input_dev->keybit); set_bit(KEY_BATT, hotk_input_dev->keybit); set_bit(KEY_SUSPEND, hotk_input_dev->keybit); hotk_input_dev->name = ACPI_PCC_DRIVER_NAME; hotk_input_dev->phys = ACPI_PCC_INPUT_PHYS; hotk_input_dev->id.bustype = BUS_PCC_HOTKEY; hotk_input_dev->id.vendor = 0x0001; hotk_input_dev->id.product = 0x0001; hotk_input_dev->id.version = 0x0100; pcc_keyinput->key_mode = PCC_KEYINPUT_MODE; pcc_keyinput->hotkey = hotkey; input_set_drvdata(hotk_input_dev, pcc_keyinput); hotkey->input_dev = hotk_input_dev; error = input_register_device(hotk_input_dev); if (error) goto err_pcc; return_VALUE(0); err_pcc: input_unregister_device(hotk_input_dev); err_input: return_VALUE(-ENOMEM); } static void __devexit acpi_pcc_remove_input(struct acpi_hotkey *hotkey) { struct input_dev *hotk_input_dev; struct pcc_keyinput *pcc_keyinput; ACPI_FUNCTION_TRACE("acpi_pcc_remove_input"); if (hotkey == NULL) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Can't free memory")); return_VOID; } hotk_input_dev = hotkey->input_dev; pcc_keyinput = input_get_drvdata(hotk_input_dev); input_unregister_device(hotk_input_dev); kfree(pcc_keyinput); } /* ------------------------------------------------------------------------- ACPI ------------------------------------------------------------------------- */ static int __devinit acpi_pcc_hotkey_add(struct acpi_device *device) { acpi_status status = AE_OK; struct acpi_hotkey *hotkey = NULL; int sifr_status, num_sifr, result; ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_add"); if (device == NULL) return_VALUE(-EINVAL); sifr_status = acpi_pcc_get_sqty(device); if (sifr_status > 255) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large")); return_VALUE(-ENODEV); } if (sifr_status < 0) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "not support SQTY")); num_sifr = 0; } else { num_sifr = sifr_status; } hotkey = kcalloc(1, sizeof(struct acpi_hotkey), GFP_KERNEL); if (hotkey == NULL) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey")); return_VALUE(-ENOMEM); } hotkey->device = device; hotkey->handle = device->handle; hotkey->num_sifr = num_sifr; device->driver_data = hotkey; strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_PCC_CLASS); status = acpi_install_notify_handler(hotkey->handle, ACPI_DEVICE_NOTIFY, acpi_pcc_hotkey_notify, hotkey); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing notify handler\n")); kfree(hotkey); return_VALUE(-ENODEV); } result = acpi_pcc_init_input(hotkey); if (result != 0) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error installing keyinput handler\n")); kfree(hotkey); return_VALUE(result); } return_VALUE(acpi_pcc_proc_init(device)); } static int __devexit acpi_pcc_hotkey_remove(struct acpi_device *device, int type) { acpi_status status = AE_OK; struct acpi_hotkey *hotkey = acpi_driver_data(device); ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_remove"); if (!device || !hotkey) return_VALUE(-EINVAL); if (hotkey->proc_dir_entry) { acpi_pcc_remove_device(device, acpi_pcc_proc_items_sifr, hotkey->num_sifr); acpi_pcc_remove_device(device, acpi_pcc_proc_items, ARRAY_SIZE(acpi_pcc_proc_items)); remove_proc_entry(PROC_PCC, acpi_root_dir); } status = acpi_remove_notify_handler(hotkey->handle, ACPI_DEVICE_NOTIFY, acpi_pcc_hotkey_notify); if (ACPI_FAILURE(status)) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error removing notify handler\n")); } acpi_pcc_remove_input(hotkey); kfree(hotkey); return_VALUE(status == AE_OK); } /* ********************************************************************* Module entry point ********************************************************************* */ static int __init acpi_pcc_init(void) { int result; ACPI_FUNCTION_TRACE("acpi_pcc_init"); printk(KERN_INFO LOGPREFIX "loading...\n"); if (acpi_disabled) { printk(KERN_INFO LOGPREFIX "ACPI disabled.\n"); return_VALUE(-ENODEV); } result = acpi_bus_register_driver(&acpi_pcc_driver); if (result < 0) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error registering hotkey driver\n")); return_VALUE(-ENODEV); } return_VALUE(result); } static void __exit acpi_pcc_exit(void) { ACPI_FUNCTION_TRACE("acpi_pcc_exit"); printk(KERN_INFO LOGPREFIX "unloading...\n"); acpi_bus_unregister_driver(&acpi_pcc_driver); return_VOID; } module_init(acpi_pcc_init); module_exit(acpi_pcc_exit);