| /* |
| * Panasonic HotKey and LCD brightness control 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> |
| * (C) 2006-2008 Harald Welte <laforge@gnumonks.org> |
| * |
| * 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: |
| * Sep.23, 2008 Harald Welte <laforge@gnumonks.org> |
| * -v0.95 rename driver from drivers/acpi/pcc_acpi.c to |
| * drivers/misc/panasonic-laptop.c |
| * |
| * Jul.04, 2008 Harald Welte <laforge@gnumonks.org> |
| * -v0.94 replace /proc interface with device attributes |
| * support {set,get}keycode on th input device |
| * |
| * Jun.27, 2008 Harald Welte <laforge@gnumonks.org> |
| * -v0.92 merge with 2.6.26-rc6 input API changes |
| * remove broken <= 2.6.15 kernel support |
| * resolve all compiler warnings |
| * various coding style fixes (checkpatch.pl) |
| * add support for backlight api |
| * major code restructuring |
| * |
| * Dac.28, 2007 Harald Welte <laforge@gnumonks.org> |
| * -v0.91 merge with 2.6.24-rc6 ACPI changes |
| * |
| * 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 for HAL access |
| * merge dbronaugh's enhancement |
| * Aug.17, 2004 David Bronaugh (dbronaugh) |
| * - Added screen brightness setting interface |
| * Thanks to FreeBSD crew (acpi_panasonic.c) |
| * 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_generate_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 |
| * |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/types.h> |
| #include <linux/backlight.h> |
| #include <linux/ctype.h> |
| #include <linux/seq_file.h> |
| #include <linux/uaccess.h> |
| #include <acpi/acpi_bus.h> |
| #include <acpi/acpi_drivers.h> |
| #include <linux/input.h> |
| |
| |
| #ifndef ACPI_HOTKEY_COMPONENT |
| #define ACPI_HOTKEY_COMPONENT 0x10000000 |
| #endif |
| |
| #define _COMPONENT ACPI_HOTKEY_COMPONENT |
| |
| MODULE_AUTHOR("Hiroshi Miura, David Bronaugh and Harald Welte"); |
| 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 |
| |
| #define ACPI_PCC_DRIVER_NAME "Panasonic Laptop Support" |
| #define ACPI_PCC_DEVICE_NAME "Hotkey" |
| #define ACPI_PCC_CLASS "pcc" |
| |
| #define ACPI_PCC_INPUT_PHYS "panasonic/hkey0" |
| |
| /* 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, |
| SINF_DC_MAX_BRIGHT, |
| SINF_DC_MIN_BRIGHT, |
| SINF_DC_CUR_BRIGHT, |
| SINF_MUTE, |
| SINF_RESERVED, |
| SINF_ENV_STATE, |
| SINF_STICKY_KEY = 0x80, |
| }; |
| /* R1 handles SINF_AC_CUR_BRIGHT as SINF_CUR_BRIGHT, doesn't know AC state */ |
| |
| static int acpi_pcc_hotkey_add(struct acpi_device *device); |
| static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type); |
| static int acpi_pcc_hotkey_resume(struct acpi_device *device); |
| static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event); |
| |
| static const struct acpi_device_id pcc_device_ids[] = { |
| { "MAT0012", 0}, |
| { "MAT0013", 0}, |
| { "MAT0018", 0}, |
| { "MAT0019", 0}, |
| { "", 0}, |
| }; |
| MODULE_DEVICE_TABLE(acpi, pcc_device_ids); |
| |
| 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 = acpi_pcc_hotkey_remove, |
| .resume = acpi_pcc_hotkey_resume, |
| .notify = acpi_pcc_hotkey_notify, |
| }, |
| }; |
| |
| #define KEYMAP_SIZE 11 |
| static const unsigned int initial_keymap[KEYMAP_SIZE] = { |
| /* 0 */ KEY_RESERVED, |
| /* 1 */ KEY_BRIGHTNESSDOWN, |
| /* 2 */ KEY_BRIGHTNESSUP, |
| /* 3 */ KEY_DISPLAYTOGGLE, |
| /* 4 */ KEY_MUTE, |
| /* 5 */ KEY_VOLUMEDOWN, |
| /* 6 */ KEY_VOLUMEUP, |
| /* 7 */ KEY_SLEEP, |
| /* 8 */ KEY_PROG1, /* Change CPU boost */ |
| /* 9 */ KEY_BATTERY, |
| /* 10 */ KEY_SUSPEND, |
| }; |
| |
| struct pcc_acpi { |
| acpi_handle handle; |
| unsigned long num_sifr; |
| int sticky_mode; |
| u32 *sinf; |
| struct acpi_device *device; |
| struct input_dev *input_dev; |
| struct backlight_device *backlight; |
| unsigned int keymap[KEYMAP_SIZE]; |
| }; |
| |
| struct pcc_keyinput { |
| struct acpi_hotkey *hotkey; |
| }; |
| |
| /* method access functions */ |
| static int acpi_pcc_write_sset(struct pcc_acpi *pcc, 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 = AE_OK; |
| |
| status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SSET, |
| ¶ms, NULL); |
| |
| return status == AE_OK; |
| } |
| |
| static inline int acpi_pcc_get_sqty(struct acpi_device *device) |
| { |
| unsigned long long s; |
| acpi_status status; |
| |
| status = acpi_evaluate_integer(device->handle, METHOD_HKEY_SQTY, |
| NULL, &s); |
| if (ACPI_SUCCESS(status)) |
| return s; |
| else { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "evaluation error HKEY.SQTY\n")); |
| return -EINVAL; |
| } |
| } |
| |
| static int acpi_pcc_retrieve_biosdata(struct pcc_acpi *pcc, u32 *sinf) |
| { |
| acpi_status status; |
| struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| union acpi_object *hkey = NULL; |
| int i; |
| |
| status = acpi_evaluate_object(pcc->handle, METHOD_HKEY_SINF, NULL, |
| &buffer); |
| if (ACPI_FAILURE(status)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "evaluation error HKEY.SINF\n")); |
| return 0; |
| } |
| |
| hkey = buffer.pointer; |
| if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n")); |
| goto end; |
| } |
| |
| if (pcc->num_sifr < hkey->package.count) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "SQTY reports bad SINF length\n")); |
| status = AE_ERROR; |
| goto end; |
| } |
| |
| 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")); |
| } |
| sinf[hkey->package.count] = -1; |
| |
| end: |
| kfree(buffer.pointer); |
| return status == AE_OK; |
| } |
| |
| /* backlight API interface functions */ |
| |
| /* This driver currently treats AC and DC brightness identical, |
| * since we don't need to invent an interface to the core ACPI |
| * logic to receive events in case a power supply is plugged in |
| * or removed */ |
| |
| static int bl_get(struct backlight_device *bd) |
| { |
| struct pcc_acpi *pcc = bl_get_data(bd); |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| return pcc->sinf[SINF_AC_CUR_BRIGHT]; |
| } |
| |
| static int bl_set_status(struct backlight_device *bd) |
| { |
| struct pcc_acpi *pcc = bl_get_data(bd); |
| int bright = bd->props.brightness; |
| int rc; |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT]) |
| bright = pcc->sinf[SINF_AC_MIN_BRIGHT]; |
| |
| if (bright < pcc->sinf[SINF_DC_MIN_BRIGHT]) |
| bright = pcc->sinf[SINF_DC_MIN_BRIGHT]; |
| |
| if (bright < pcc->sinf[SINF_AC_MIN_BRIGHT] || |
| bright > pcc->sinf[SINF_AC_MAX_BRIGHT]) |
| return -EINVAL; |
| |
| rc = acpi_pcc_write_sset(pcc, SINF_AC_CUR_BRIGHT, bright); |
| if (rc < 0) |
| return rc; |
| |
| return acpi_pcc_write_sset(pcc, SINF_DC_CUR_BRIGHT, bright); |
| } |
| |
| static struct backlight_ops pcc_backlight_ops = { |
| .get_brightness = bl_get, |
| .update_status = bl_set_status, |
| }; |
| |
| |
| /* sysfs user interface functions */ |
| |
| static ssize_t show_numbatt(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct acpi_device *acpi = to_acpi_device(dev); |
| struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_NUM_BATTERIES]); |
| } |
| |
| static ssize_t show_lcdtype(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct acpi_device *acpi = to_acpi_device(dev); |
| struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_LCD_TYPE]); |
| } |
| |
| static ssize_t show_mute(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct acpi_device *acpi = to_acpi_device(dev); |
| struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_MUTE]); |
| } |
| |
| static ssize_t show_sticky(struct device *dev, struct device_attribute *attr, |
| char *buf) |
| { |
| struct acpi_device *acpi = to_acpi_device(dev); |
| struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) |
| return -EIO; |
| |
| return snprintf(buf, PAGE_SIZE, "%u\n", pcc->sinf[SINF_STICKY_KEY]); |
| } |
| |
| static ssize_t set_sticky(struct device *dev, struct device_attribute *attr, |
| const char *buf, size_t count) |
| { |
| struct acpi_device *acpi = to_acpi_device(dev); |
| struct pcc_acpi *pcc = acpi_driver_data(acpi); |
| int val; |
| |
| if (count && sscanf(buf, "%i", &val) == 1 && |
| (val == 0 || val == 1)) { |
| acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, val); |
| pcc->sticky_mode = val; |
| } |
| |
| return count; |
| } |
| |
| static DEVICE_ATTR(numbatt, S_IRUGO, show_numbatt, NULL); |
| static DEVICE_ATTR(lcdtype, S_IRUGO, show_lcdtype, NULL); |
| static DEVICE_ATTR(mute, S_IRUGO, show_mute, NULL); |
| static DEVICE_ATTR(sticky_key, S_IRUGO | S_IWUSR, show_sticky, set_sticky); |
| |
| static struct attribute *pcc_sysfs_entries[] = { |
| &dev_attr_numbatt.attr, |
| &dev_attr_lcdtype.attr, |
| &dev_attr_mute.attr, |
| &dev_attr_sticky_key.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group pcc_attr_group = { |
| .name = NULL, /* put in device directory */ |
| .attrs = pcc_sysfs_entries, |
| }; |
| |
| |
| /* hotkey input device driver */ |
| |
| static int pcc_getkeycode(struct input_dev *dev, |
| unsigned int scancode, unsigned int *keycode) |
| { |
| struct pcc_acpi *pcc = input_get_drvdata(dev); |
| |
| if (scancode >= ARRAY_SIZE(pcc->keymap)) |
| return -EINVAL; |
| |
| *keycode = pcc->keymap[scancode]; |
| |
| return 0; |
| } |
| |
| static int keymap_get_by_keycode(struct pcc_acpi *pcc, unsigned int keycode) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) { |
| if (pcc->keymap[i] == keycode) |
| return i+1; |
| } |
| |
| return 0; |
| } |
| |
| static int pcc_setkeycode(struct input_dev *dev, |
| unsigned int scancode, unsigned int keycode) |
| { |
| struct pcc_acpi *pcc = input_get_drvdata(dev); |
| int oldkeycode; |
| |
| if (scancode >= ARRAY_SIZE(pcc->keymap)) |
| return -EINVAL; |
| |
| oldkeycode = pcc->keymap[scancode]; |
| pcc->keymap[scancode] = keycode; |
| |
| set_bit(keycode, dev->keybit); |
| |
| if (!keymap_get_by_keycode(pcc, oldkeycode)) |
| clear_bit(oldkeycode, dev->keybit); |
| |
| return 0; |
| } |
| |
| static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) |
| { |
| struct input_dev *hotk_input_dev = pcc->input_dev; |
| int rc; |
| int key_code, hkey_num; |
| unsigned long long result; |
| |
| rc = acpi_evaluate_integer(pcc->handle, METHOD_HKEY_QUERY, |
| NULL, &result); |
| if (!ACPI_SUCCESS(rc)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "error getting hotkey status\n")); |
| return; |
| } |
| |
| acpi_bus_generate_proc_event(pcc->device, HKEY_NOTIFY, result); |
| |
| hkey_num = result & 0xf; |
| |
| if (hkey_num < 0 || hkey_num >= ARRAY_SIZE(pcc->keymap)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "hotkey number out of range: %d\n", |
| hkey_num)); |
| return; |
| } |
| |
| key_code = pcc->keymap[hkey_num]; |
| |
| if (key_code != KEY_RESERVED) { |
| int pushed = (result & 0x80) ? TRUE : FALSE; |
| |
| input_report_key(hotk_input_dev, key_code, pushed); |
| input_sync(hotk_input_dev); |
| } |
| |
| return; |
| } |
| |
| static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event) |
| { |
| struct pcc_acpi *pcc = acpi_driver_data(device); |
| |
| switch (event) { |
| case HKEY_NOTIFY: |
| acpi_pcc_generate_keyinput(pcc); |
| break; |
| default: |
| /* nothing to do */ |
| break; |
| } |
| } |
| |
| static int acpi_pcc_init_input(struct pcc_acpi *pcc) |
| { |
| int i, rc; |
| |
| pcc->input_dev = input_allocate_device(); |
| if (!pcc->input_dev) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Couldn't allocate input device for hotkey")); |
| return -ENOMEM; |
| } |
| |
| pcc->input_dev->evbit[0] = BIT(EV_KEY); |
| |
| pcc->input_dev->name = ACPI_PCC_DRIVER_NAME; |
| pcc->input_dev->phys = ACPI_PCC_INPUT_PHYS; |
| pcc->input_dev->id.bustype = BUS_HOST; |
| pcc->input_dev->id.vendor = 0x0001; |
| pcc->input_dev->id.product = 0x0001; |
| pcc->input_dev->id.version = 0x0100; |
| pcc->input_dev->getkeycode = pcc_getkeycode; |
| pcc->input_dev->setkeycode = pcc_setkeycode; |
| |
| /* load initial keymap */ |
| memcpy(pcc->keymap, initial_keymap, sizeof(pcc->keymap)); |
| |
| for (i = 0; i < ARRAY_SIZE(pcc->keymap); i++) |
| __set_bit(pcc->keymap[i], pcc->input_dev->keybit); |
| __clear_bit(KEY_RESERVED, pcc->input_dev->keybit); |
| |
| input_set_drvdata(pcc->input_dev, pcc); |
| |
| rc = input_register_device(pcc->input_dev); |
| if (rc < 0) |
| input_free_device(pcc->input_dev); |
| |
| return rc; |
| } |
| |
| /* kernel module interface */ |
| |
| static int acpi_pcc_hotkey_resume(struct acpi_device *device) |
| { |
| struct pcc_acpi *pcc = acpi_driver_data(device); |
| acpi_status status = AE_OK; |
| |
| if (device == NULL || pcc == NULL) |
| return -EINVAL; |
| |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", |
| pcc->sticky_mode)); |
| |
| status = acpi_pcc_write_sset(pcc, SINF_STICKY_KEY, pcc->sticky_mode); |
| |
| return status == AE_OK ? 0 : -EINVAL; |
| } |
| |
| static int acpi_pcc_hotkey_add(struct acpi_device *device) |
| { |
| struct pcc_acpi *pcc; |
| int num_sifr, result; |
| |
| if (!device) |
| return -EINVAL; |
| |
| num_sifr = acpi_pcc_get_sqty(device); |
| |
| if (num_sifr > 255) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large")); |
| return -ENODEV; |
| } |
| |
| pcc = kzalloc(sizeof(struct pcc_acpi), GFP_KERNEL); |
| if (!pcc) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Couldn't allocate mem for pcc")); |
| return -ENOMEM; |
| } |
| |
| pcc->sinf = kzalloc(sizeof(u32) * (num_sifr + 1), GFP_KERNEL); |
| if (!pcc->sinf) { |
| result = -ENOMEM; |
| goto out_hotkey; |
| } |
| |
| pcc->device = device; |
| pcc->handle = device->handle; |
| pcc->num_sifr = num_sifr; |
| device->driver_data = pcc; |
| strcpy(acpi_device_name(device), ACPI_PCC_DEVICE_NAME); |
| strcpy(acpi_device_class(device), ACPI_PCC_CLASS); |
| |
| result = acpi_pcc_init_input(pcc); |
| if (result) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Error installing keyinput handler\n")); |
| goto out_sinf; |
| } |
| |
| /* initialize backlight */ |
| pcc->backlight = backlight_device_register("panasonic", NULL, pcc, |
| &pcc_backlight_ops); |
| if (IS_ERR(pcc->backlight)) |
| goto out_input; |
| |
| if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Couldn't retrieve BIOS data\n")); |
| goto out_backlight; |
| } |
| |
| /* read the initial brightness setting from the hardware */ |
| pcc->backlight->props.max_brightness = |
| pcc->sinf[SINF_AC_MAX_BRIGHT]; |
| pcc->backlight->props.brightness = pcc->sinf[SINF_AC_CUR_BRIGHT]; |
| |
| /* read the initial sticky key mode from the hardware */ |
| pcc->sticky_mode = pcc->sinf[SINF_STICKY_KEY]; |
| |
| /* add sysfs attributes */ |
| result = sysfs_create_group(&device->dev.kobj, &pcc_attr_group); |
| if (result) |
| goto out_backlight; |
| |
| return 0; |
| |
| out_backlight: |
| backlight_device_unregister(pcc->backlight); |
| out_input: |
| input_unregister_device(pcc->input_dev); |
| /* no need to input_free_device() since core input API refcount and |
| * free()s the device */ |
| out_sinf: |
| kfree(pcc->sinf); |
| out_hotkey: |
| kfree(pcc); |
| |
| return result; |
| } |
| |
| static int __init acpi_pcc_init(void) |
| { |
| int result = 0; |
| |
| if (acpi_disabled) |
| return -ENODEV; |
| |
| result = acpi_bus_register_driver(&acpi_pcc_driver); |
| if (result < 0) { |
| ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| "Error registering hotkey driver\n")); |
| return -ENODEV; |
| } |
| |
| return 0; |
| } |
| |
| static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type) |
| { |
| struct pcc_acpi *pcc = acpi_driver_data(device); |
| |
| if (!device || !pcc) |
| return -EINVAL; |
| |
| sysfs_remove_group(&device->dev.kobj, &pcc_attr_group); |
| |
| backlight_device_unregister(pcc->backlight); |
| |
| input_unregister_device(pcc->input_dev); |
| /* no need to input_free_device() since core input API refcount and |
| * free()s the device */ |
| |
| kfree(pcc->sinf); |
| kfree(pcc); |
| |
| return 0; |
| } |
| |
| static void __exit acpi_pcc_exit(void) |
| { |
| acpi_bus_unregister_driver(&acpi_pcc_driver); |
| } |
| |
| module_init(acpi_pcc_init); |
| module_exit(acpi_pcc_exit); |