[PATCH] Panasonic ACPI driver

From: Timo Hoenig
Date: Thu Feb 10 2005 - 15:13:34 EST

Hi,

this is another ACPI driver for several Panasonic notebooks. The driver
provides support for hotkeys and enables access to other hardware like
reading/setting the LCD brightness.

Like the Sony ACPI driver--recently sent by Stelian Pop--it would be
good to to see this one to be integrated into the -mm tree, too.

The attached patch is against 2.6.11-rc3.

Thanks,

-- Timo

..............................................................
Timo Hönig <thoenig at suse dot de>
..................................................:: gpg ::...
Fingerprint: 0998 0ACA A1D2 2612 4D96 DD8B E03F 084B B305 4066
diff -urN linux-2.6.11-rc3_a/drivers/acpi/Kconfig linux-2.6.11-rc3_b/drivers/acpi/Kconfig
--- linux-2.6.11-rc3_a/drivers/acpi/Kconfig 2005-02-03 02:57:04 +0100
+++ linux-2.6.11-rc3_b/drivers/acpi/Kconfig 2005-02-10 20:16:22 +0100
@@ -242,6 +242,22 @@
If you have a legacy free Toshiba laptop (such as the Libretto L1
series), say Y.

+config ACPI_PCC
+ tristate "Panasonic Laptop Extras"
+ depends on X86
+ depends on ACPI_INTERPRETER
+ default m
+ ---help---
+ This driver implements hotkey functionality and access to
+ various hardware (e.g. LCD brightness) for the
+ Panasonic R1 (N variant), R2, R3, T2, W2, and Y2 laptops.
+
+ Further details and user space tools are available at
+ <http://www.da-cha.org/letsnote/>.
+
+ If you have one of the above listed Panasonic laptops
+ say Y or M here.
+
config ACPI_CUSTOM_DSDT
bool "Include Custom DSDT"
depends on ACPI_INTERPRETER && !STANDALONE
diff -urN linux-2.6.11-rc3_a/drivers/acpi/Makefile linux-2.6.11-rc3_b/drivers/acpi/Makefile
--- linux-2.6.11-rc3_a/drivers/acpi/Makefile 2005-02-03 02:56:53 +0100
+++ linux-2.6.11-rc3_b/drivers/acpi/Makefile 2005-02-10 20:15:22 +0100
@@ -54,4 +54,5 @@
obj-$(CONFIG_ACPI_ASUS) += asus_acpi.o
obj-$(CONFIG_ACPI_IBM) += ibm_acpi.o
obj-$(CONFIG_ACPI_TOSHIBA) += toshiba_acpi.o
+obj-$(CONFIG_ACPI_PCC) += pcc_acpi.o
obj-$(CONFIG_ACPI_BUS) += scan.o motherboard.o
diff -urN linux-2.6.11-rc3_a/drivers/acpi/pcc_acpi.c linux-2.6.11-rc3_b/drivers/acpi/pcc_acpi.c
--- linux-2.6.11-rc3_a/drivers/acpi/pcc_acpi.c 1970-01-01 01:00:00 +0100
+++ linux-2.6.11-rc3_b/drivers/acpi/pcc_acpi.c 2005-02-10 14:50:59 +0100
@@ -0,0 +1,937 @@
+/*
+ * Panasonic HotKey and lcd brightness control Extra driver
+ * (C) 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * (C) 2004 NTT DATA Intellilink Co. http://www.intellilink.co.jp/
+ * (C) 2005 Timo Hoenig <thoenig@xxxxxxxxx>
+ *
+ * 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
+ *
+ */
+
+#define ACPI_PCC_VERSION "0.8.3"
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/ctype.h>
+#include <linux/seq_file.h>
+#include <linux/input.h>
+
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Hiroshi Miura");
+MODULE_DESCRIPTION("ACPI driver for Panasonic Lets Note laptops");
+MODULE_LICENSE("GPL");
+
+/* Defines */
+#define ACPI_HOTKEY_COMPONENT 0x10000000
+#define _COMPONENT ACPI_HOTKEY_COMPONENT
+#define HKEY_NOTIFY 0x80
+#define PROC_PCC "panasonic"
+
+#define PCC_LOG "pcc_acpi: "
+#define PCC_ERR KERN_ERR PCC_LOG
+#define PCC_INFO KERN_INFO PCC_LOG
+
+/* This is transitional definition */
+#ifndef KEY_BATT
+# define KEY_BATT 227
+#endif
+
+#define PROC_STR_MAX_LEN 8
+
+/* 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,
+};
+
+
+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, int state);
+
+static struct acpi_driver acpi_pcc_driver = {
+ .name = "Panasonic PCC extra driver",
+ .class = "pcc",
+ .ids = "MAT0012,MAT0013,MAT0018,MAT0019",
+ .ops = {
+ .add = acpi_pcc_hotkey_add,
+ .remove = __devexit_p(acpi_pcc_hotkey_remove),
+ .resume = acpi_pcc_hotkey_resume,
+ },
+};
+
+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;
+};
+
+/* method access functions */
+static int acpi_pcc_write_sset(struct acpi_hotkey *hotkey, int func, int val)
+{
+ acpi_status status;
+ 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,
+ };
+
+ status = acpi_evaluate_object(hotkey->handle, "SSET", &params, NULL);
+
+ if (status != AE_OK) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static inline int acpi_pcc_get_sqty(struct acpi_device *device)
+{
+ acpi_status status;
+ unsigned long s;
+
+ status = acpi_evaluate_integer(device->handle, "SQTY", NULL, &s);
+
+ if (ACPI_SUCCESS(status)) {
+ return(s);
+ }
+ else {
+ printk(PCC_ERR "acpi_pcc_get_sqty() evaluation error \
+ HKEY.SQTY\n");
+ return(-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;
+
+ status = acpi_evaluate_object(hotkey->handle, "SINF", 0 , &buffer);
+ if (ACPI_FAILURE(status)) {
+ printk(PCC_ERR "acpi_pcc_retrieve_biosdata() evaluation error \
+ HKEY.SINF\n");
+ return 0;
+ }
+
+ hkey = buffer.pointer;
+ if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
+ printk(PCC_ERR "acpi_pcc_retrieve_biosdata() invalid \
+ HKEY.SINF\n");
+ goto end;
+ }
+
+ if (hotkey->num_sifr < hkey->package.count) {
+ printk(PCC_ERR "acpi_pcc_retrieve_biosdata() 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 {
+ printk(PCC_ERR "acpi_pcc_retrieve_biosdata() invalid \
+ HKEY.SINF data");
+ }
+ }
+ sinf[hkey->package.count] = -1;
+
+end:
+ acpi_os_free(buffer.pointer);
+
+ if (status != AE_OK) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static int acpi_pcc_read_sinf_field(struct seq_file *seq, int field)
+{
+ struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
+ u32* sinf = kmalloc(sizeof(u32) * (hotkey->num_sifr + 1), GFP_KERNEL);
+
+ if (!sinf) {
+ printk(PCC_ERR "acpi_pcc_read_sinf_field() could not allocate \
+ %li bytes\n", sizeof(u32) * hotkey->num_sifr);
+ return 0;
+ }
+
+ if (acpi_pcc_retrieve_biosdata(hotkey, sinf)) {
+ seq_printf(seq, "%u\n", sinf[field]);
+ }
+ else {
+ printk(PCC_ERR "acpi_pcc_read_sinf_field() could not retrieve \
+ BIOS data\n");
+ }
+
+ kfree(sinf);
+ return 0;
+}
+
+/* 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 acpi_pcc_read_sinf_field(seq, (FUNC)); \
+}
+
+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_mute_show, SINF_MUTE);
+
+static int acpi_pcc_sticky_key_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_hotkey *hotkey = seq->private;
+
+ if (!hotkey || !hotkey->device) {
+ return 0;
+ }
+
+ seq_printf(seq, "%d\n", hotkey->sticky_mode);
+
+ return 0;
+}
+
+static int acpi_pcc_keyinput_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
+ struct input_dev *hotk_input_dev = hotkey->input_dev;
+ struct pcc_keyinput *keyinput = hotk_input_dev->private;
+
+ seq_printf(seq, "%d\n", keyinput->key_mode);
+
+ return 0;
+}
+
+static int acpi_pcc_version_show(struct seq_file *seq, void *offset)
+{
+ struct acpi_hotkey *hotkey = (struct acpi_hotkey *) seq->private;
+
+ if (!hotkey || !hotkey->device) {
+ return 0;
+ }
+
+ seq_printf(seq, "%s version %s\n", "Panasonic PCC extra driver",
+ ACPI_PCC_VERSION);
+ seq_printf(seq, "%li functions\n", hotkey->num_sifr);
+
+ return 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;
+
+ if (!hotkey || (count > sizeof(write_string) - 1)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(write_string, buffer, count)) {
+ return -EFAULT;
+ }
+ write_string[count] = '\0';
+
+ if (sscanf(write_string, "%i", &val) == 1 && (val == 0 || val == 1)) {
+ acpi_pcc_write_sset(hotkey, sinf_func, val);
+ }
+
+ return 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 = kmalloc(sizeof(u32) * (hotkey->num_sifr + 1), GFP_KERNEL);
+
+ if (!hotkey || (count > sizeof(write_string) - 1)) {
+ return -EINVAL;
+ }
+
+ if (!sinf) {
+ printk(PCC_ERR "acpi_pcc_write_brightness() could not \
+ allocate %li bytes\n",
+ sizeof(u32) * hotkey->num_sifr);
+ return -EFAULT;
+ }
+
+ if (copy_from_user(write_string, buffer, count)) {
+ return -EFAULT;
+ }
+
+ write_string[count] = '\0';
+
+ if (!acpi_pcc_retrieve_biosdata(hotkey, sinf)) {
+ printk(PCC_ERR "acpi_pcc_write_brightness() could not \
+ retrieve BIOS data\n");
+ goto end;
+ }
+
+ if ((sscanf(write_string, "%i", &bright) == 1) &&
+ (bright >= sinf[min_index]) &&
+ (bright <= sinf[max_index])) {
+ acpi_pcc_write_sset(hotkey, cur_index, bright);
+ }
+
+end:
+ kfree(sinf);
+ return count;
+}
+
+static ssize_t acpi_pcc_write_ac_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_dc_brightness(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return 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_mute (struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *ppos)
+{
+ return 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)
+{
+ return acpi_pcc_write_single_flag(file, buffer, count,
+ SINF_STICKY_KEY);
+}
+
+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;
+
+ if (!hotkey || (count > sizeof(write_string) - 1)) {
+ return -EINVAL;
+ }
+
+ if (copy_from_user(write_string, buffer, count)) {
+ return -EFAULT;
+ }
+
+ write_string[count] = '\0';
+
+ if ((sscanf(write_string, "%i", &key_mode) == 1) &&
+ (key_mode == 0 || key_mode == 1)) {
+ keyinput = (struct pcc_keyinput *) hotkey->input_dev->private;
+ keyinput->key_mode = key_mode;
+ }
+
+ return 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 = hotk_input_dev->private;
+ 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 does 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,
+ };
+
+ if (keyinput->key_mode == 0) {
+ return;
+ }
+
+ hkey_num = hinf & 0xf;
+
+ if ((0 > hkey_num) || (hkey_num > ARRAY_SIZE(key_map))) {
+ printk(PCC_ERR "acpi_pcc_generete_keyinput() hotkey \
+ number (%d) out of range\n", hkey_num);
+ return;
+ }
+
+ 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);
+ }
+
+ return;
+}
+
+static int acpi_pcc_hotkey_get_key(struct acpi_hotkey *hotkey)
+{
+ acpi_status status;
+ unsigned long result;
+
+ status = acpi_evaluate_integer(hotkey->handle, "HINF", NULL, &result);
+ if (likely(ACPI_SUCCESS(status))) {
+ hotkey->status = result;
+ }
+ else {
+ printk(PCC_ERR "acpi_pcc_hotkey_get_key() error getting \
+ hotkey status\n");
+ }
+
+ if (status != AE_OK) {
+ return -1;
+ }
+
+ return 0;
+}
+
+void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data)
+{
+ struct acpi_hotkey *hotkey = (struct acpi_hotkey *) data;
+
+ switch(event) {
+ case HKEY_NOTIFY:
+ if (acpi_pcc_hotkey_get_key(hotkey)) {
+ /* generate event
+ * e.g. '"pcc HKEY 00000080 00000084"' when Fn+F4 is
+ * pressed
+ *
+ */
+
+ acpi_bus_generate_event(hotkey->device, event,
+ hotkey->status);
+ }
+
+ acpi_pcc_generete_keyinput(hotkey);
+ break;
+
+ default:
+ /* nothing to do */
+ break;
+
+ }
+
+ return;
+}
+
+/* proc interface */
+#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_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_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);
+
+#define SEQ_FILEOPS_R(_open_func_name_) \
+{ \
+ .open = _open_func_name_, \
+ .read = seq_read, \
+ .llseek = seq_lseek, \
+ .release = single_release, \
+}
+
+#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, \
+}
+
+typedef struct file_operations fops_t;
+
+/* number of batteries */
+static fops_t acpi_pcc_numbatteries_fops = \
+ SEQ_FILEOPS_R (acpi_pcc_numbatteries_open_fs);
+
+/* type of lcd */
+static fops_t acpi_pcc_lcdtype_fops = \
+ SEQ_FILEOPS_R (acpi_pcc_lcdtype_open_fs);
+
+/* mute */
+static fops_t acpi_pcc_mute_fops = \
+ SEQ_FILEOPS_RW(acpi_pcc_mute_open_fs,
+ acpi_pcc_write_mute);
+
+/* brightness */
+static fops_t acpi_pcc_ac_brightness_fops = \
+ SEQ_FILEOPS_RW(acpi_pcc_ac_brightness_open_fs,
+ acpi_pcc_write_ac_brightness);
+static fops_t acpi_pcc_ac_brightness_max_fops = \
+ SEQ_FILEOPS_R(acpi_pcc_ac_brightness_max_open_fs);
+static fops_t acpi_pcc_ac_brightness_min_fops = \
+ SEQ_FILEOPS_R(acpi_pcc_ac_brightness_min_open_fs);
+static fops_t acpi_pcc_dc_brightness_fops = \
+ SEQ_FILEOPS_RW(acpi_pcc_dc_brightness_open_fs,
+ acpi_pcc_write_dc_brightness);
+static fops_t acpi_pcc_dc_brightness_max_fops = \
+ SEQ_FILEOPS_R(acpi_pcc_dc_brightness_max_open_fs);
+static fops_t acpi_pcc_dc_brightness_min_fops = \
+ SEQ_FILEOPS_R(acpi_pcc_dc_brightness_min_open_fs);
+
+/* sticky key */
+static fops_t acpi_pcc_sticky_key_fops = \
+ SEQ_FILEOPS_RW(acpi_pcc_sticky_key_open_fs,
+ acpi_pcc_write_sticky_key);
+
+/* keyinput */
+static fops_t acpi_pcc_keyinput_fops = \
+ SEQ_FILEOPS_RW(acpi_pcc_keyinput_open_fs,
+ acpi_pcc_write_keyinput);
+
+/* version */
+static fops_t acpi_pcc_version_fops = \
+ SEQ_FILEOPS_R (acpi_pcc_version_open_fs);
+
+typedef struct _ProcItem
+{
+ const char* name;
+ struct file_operations *fops;
+ mode_t flag;
+} ProcItem;
+
+/* Note: These functions map *exactly* to the SINF/SSET functions */
+ProcItem 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 },
+ { "mute", &acpi_pcc_mute_fops, S_IFREG |
+ S_IRUGO |
+ S_IWUSR },
+ { NULL, NULL, 0 },
+};
+
+ProcItem 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 __init acpi_pcc_add_device(struct acpi_device *device,
+ ProcItem *proc_items,
+ int num)
+{
+ struct acpi_hotkey *hotkey = \
+ (struct acpi_hotkey*)acpi_driver_data(device);
+ struct proc_dir_entry* proc;
+ ProcItem* 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 -ENODEV;
+ }
+ }
+
+ return 0;
+}
+
+static int __init acpi_pcc_proc_init(struct acpi_device *device)
+{
+ acpi_status status;
+ struct acpi_hotkey *hotkey = \
+ (struct acpi_hotkey*)acpi_driver_data(device);
+ struct proc_dir_entry* acpi_pcc_dir;
+
+ acpi_pcc_dir = proc_mkdir(PROC_PCC, acpi_root_dir);
+
+ if (unlikely(!acpi_pcc_dir)) {
+ printk(PCC_ERR "acpi_pcc_proc_init() could not create proc \
+ entry\n");
+ return -ENODEV;
+ }
+
+ acpi_pcc_dir->owner = THIS_MODULE;
+ hotkey->proc_dir_entry = acpi_pcc_dir;
+
+ status = acpi_pcc_add_device(device, pcc_proc_items_sifr,
+ hotkey->num_sifr);
+ status |= acpi_pcc_add_device(device, pcc_proc_items,
+ sizeof(pcc_proc_items)/sizeof(ProcItem));
+
+ if (unlikely(status)) {
+ remove_proc_entry(PROC_PCC, acpi_root_dir);
+ hotkey->proc_dir_entry = NULL;
+ return -ENODEV;
+ }
+
+ return status;
+}
+
+static void __exit acpi_pcc_remove_device(struct acpi_device *device,
+ ProcItem *proc_items,
+ int num)
+{
+ struct acpi_hotkey *hotkey =
+ (struct acpi_hotkey*)acpi_driver_data(device);
+ ProcItem* 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;
+}
+
+/* input init */
+static int hotk_input_open(struct input_dev *dev)
+{
+ return 0;
+}
+
+static void hotk_input_close(struct input_dev *dev)
+{
+ return;
+}
+
+static int acpi_pcc_init_input(struct acpi_hotkey *hotkey)
+{
+ struct input_dev *hotk_input_dev;
+ struct pcc_keyinput *pcc_keyinput;
+
+ hotk_input_dev = kmalloc(sizeof(struct input_dev),GFP_KERNEL);
+
+ if (!hotk_input_dev) {
+ printk(PCC_ERR "acpi_pcc_init_input() could not allocate \
+ memory\n");
+ return -ENOMEM;
+ }
+
+ pcc_keyinput = kmalloc(sizeof(struct pcc_keyinput),GFP_KERNEL);
+
+ if (!pcc_keyinput) {
+ printk(PCC_ERR "acpi_pcc_init_input() could not allocate \
+ memory\n");
+ return -ENOMEM;
+ }
+
+ memset(hotk_input_dev, 0, sizeof(struct input_dev));
+ hotk_input_dev->open = hotk_input_open;
+ hotk_input_dev->close = hotk_input_close;
+
+ 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 = "Panasonic PCC extra driver";
+ hotk_input_dev->phys = "panasonic/hkey0";
+ hotk_input_dev->id.bustype = 0x1a; /* XXX FIXME: BUS_I8042? */
+ hotk_input_dev->id.vendor = 0x0001;
+ hotk_input_dev->id.product = 0x0001;
+ hotk_input_dev->id.version = 0x0100;
+
+ pcc_keyinput->key_mode = 1; /* default on */
+ pcc_keyinput->hotkey = hotkey;
+
+ hotk_input_dev->private = pcc_keyinput;
+
+ hotkey->input_dev = hotk_input_dev;
+
+ input_register_device(hotk_input_dev);
+
+ return 0;
+}
+
+/* module init */
+static int acpi_pcc_hotkey_add (struct acpi_device *device)
+{
+ acpi_status status;
+ struct acpi_hotkey *hotkey = NULL;
+ int num_sifr, result;
+
+ if (!device) {
+ return -EINVAL;
+ }
+
+ num_sifr = acpi_pcc_get_sqty(device);
+
+ if (num_sifr > 255) {
+ printk(PCC_ERR "acpi_pcc_hotkey_add() num_sifr too large \
+ (%i)\n", num_sifr);
+ return -ENODEV;
+ }
+
+ hotkey = kmalloc(sizeof(struct acpi_hotkey), GFP_KERNEL);
+
+ if (!hotkey) {
+ printk(PCC_ERR "acpi_pcc_hotkey_add() could not allocate \
+ memory\n");
+ return -ENOMEM;
+ }
+
+ memset(hotkey, 0, sizeof(struct acpi_hotkey));
+
+ hotkey->device = device;
+ hotkey->handle = device->handle;
+ hotkey->num_sifr = num_sifr;
+ acpi_driver_data(device) = hotkey;
+ strcpy(acpi_device_name(device), "Panasonic PCC");
+ strcpy(acpi_device_class(device), "pcc");
+
+ status = acpi_install_notify_handler (
+ hotkey->handle,
+ ACPI_DEVICE_NOTIFY,
+ acpi_pcc_hotkey_notify,
+ hotkey);
+
+ if (ACPI_FAILURE(status)) {
+ printk(PCC_ERR "acpi_pcc_hotkey_add() error installing notify \
+ handler\n");
+ kfree(hotkey);
+ return -ENODEV;
+ }
+
+ result = acpi_pcc_init_input(hotkey);
+
+ if (result) {
+ printk(PCC_ERR "acpi_pcc_hotkey_add() error installing input \
+ handler\n");
+ kfree(hotkey);
+ return result;
+ }
+
+ return acpi_pcc_proc_init(device);
+}
+
+static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type)
+{
+ acpi_status status;
+ struct acpi_hotkey *hotkey = acpi_driver_data(device);
+
+ if (!device || !hotkey) {
+ return -EINVAL;
+ }
+
+ if (hotkey->proc_dir_entry) {
+ acpi_pcc_remove_device(device, pcc_proc_items_sifr,
+ hotkey->num_sifr);
+ acpi_pcc_remove_device(device, pcc_proc_items,
+ sizeof(pcc_proc_items)/sizeof(ProcItem));
+ 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)) {
+ printk(PCC_ERR "acpi_pcc_hotkey_remove() error removing \
+ notify handler\n");
+ }
+
+ kfree(hotkey);
+
+ if(status != AE_OK) {
+ return -1;
+ }
+
+ return 0;
+}
+
+static int acpi_pcc_hotkey_resume(struct acpi_device *device, int state)
+{
+ acpi_status status;
+ struct acpi_hotkey *hotkey = acpi_driver_data(device);
+
+ if (device == NULL || hotkey == NULL) {
+ return -EINVAL;
+ }
+
+ printk(PCC_INFO "acpi_pcc_hotkey_resume() 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 -EINVAL;
+ }
+
+ return 0;
+}
+
+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) {
+ printk(PCC_ERR "error registering hotkey driver\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void __exit acpi_pcc_exit(void)
+{
+ acpi_bus_unregister_driver(&acpi_pcc_driver);
+
+ return;
+}
+
+module_init(acpi_pcc_init);
+module_exit(acpi_pcc_exit);