diff options
Diffstat (limited to 'drivers/staging/pcc-acpi/pcc-acpi.c')
-rw-r--r-- | drivers/staging/pcc-acpi/pcc-acpi.c | 1111 |
1 files changed, 1111 insertions, 0 deletions
diff --git a/drivers/staging/pcc-acpi/pcc-acpi.c b/drivers/staging/pcc-acpi/pcc-acpi.c new file mode 100644 index 00000000000..7715c31f273 --- /dev/null +++ b/drivers/staging/pcc-acpi/pcc-acpi.c @@ -0,0 +1,1111 @@ +/* + * Panasonic HotKey and lcd brightness control Extra driver + * (C) 2004 Hiroshi Miura <miura@da-cha.org> + * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/ + * (C) YOKOTA Hiroshi <yokota (at) netlab. is. tsukuba. ac. jp> + * (C) 2004 David Bronaugh <dbronaugh> + * + * 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 <miura@da-cha.org> + * -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 <miura@da-cha.org> + * -v0.8.4 follow to change keyinput structure + * thanks Fabian Yamaguchi <fabs@cs.tu-berlin.de>, + * Jacob Bower <jacob.bower@ic.ac.uk> and + * Hiroshi Yokota for providing solutions. + * + * Oct.02, 2004 Hiroshi Miura <miura@da-cha.org> + * -v0.8.2 merge code of YOKOTA Hiroshi + * <yokota@netlab.is.tsukuba.ac.jp>. + * Add sticky key mode interface. + * Refactoring acpi_pcc_generete_keyinput(). + * + * Sep.15, 2004 Hiroshi Miura <miura@da-cha.org> + * -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 <miura@da-cha.org> + * -v0.7 Change proc interface functions using seq_file + * facility as same as other ACPI drivers. + * + * Aug.28, 2004 Hiroshi Miura <miura@da-cha.org> + * -v0.6.4 Fix a silly error with status checking + * + * Aug.25, 2004 Hiroshi Miura <miura@da-cha.org> + * -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 <dbronaugh@linuxboxen.org> + * -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 <dbronaugh@linuxboxen.org> + * -v0.6.1 Fix a silly error with status checking + * + * Aug.20, 2004 David Bronaugh <dbronaugh@linuxboxen.org> + * - 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 <miura@da-cha.org> + * - v0.5 support LCD brightness control + * based on the disclosed information by MEI. + * + * Jul.25, 2004 Hiroshi Miura <miura@da-cha.org> + * - v0.4 first post version + * add function to retrive SIFR + * + * Jul.24, 2004 Hiroshi Miura <miura@da-cha.org> + * - v0.3 get proper status of hotkey + * + * Jul.22, 2004 Hiroshi Miura <miura@da-cha.org> + * - v0.2 add HotKey handler + * + * Jul.17, 2004 Hiroshi Miura <miura@da-cha.org> + * - v0.1 start from toshiba_acpi driver written by John Belmonte + * + */ + +#define ACPI_PCC_VERSION "0.9+hy" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/types.h> +#include <linux/ctype.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> +#include <linux/slab.h> +#include <linux/uaccess.h> +#include <acpi/acpi_bus.h> +#include <acpi/acpi_drivers.h> + + +/************************************************************************* + * "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; + acpi_driver_data(device) = 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); |