[PATCH 01/42] Staging: add pcc-acpi driver

From: Greg Kroah-Hartman
Date: Wed Oct 22 2008 - 13:33:01 EST

From: Hiroshi Miura <miura@xxxxxxxxxx>

Adds the pcc-acpi driver to the staging tree.

From: Hiroshi Miura <miura@xxxxxxxxxx>
Cc: YOKOTA Hiroshi <yokota@xxxxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxx>
---
drivers/staging/Kconfig | 2 +
drivers/staging/Makefile | 1 +
drivers/staging/pcc-acpi/Kconfig | 11 +
drivers/staging/pcc-acpi/Makefile | 1 +
drivers/staging/pcc-acpi/TODO | 7 +
drivers/staging/pcc-acpi/pcc-acpi.c | 974 +++++++++++++++++++++++++++++++++++
6 files changed, 996 insertions(+), 0 deletions(-)
create mode 100644 drivers/staging/pcc-acpi/Kconfig
create mode 100644 drivers/staging/pcc-acpi/Makefile
create mode 100644 drivers/staging/pcc-acpi/TODO
create mode 100644 drivers/staging/pcc-acpi/pcc-acpi.c

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 2a79dec..65a86b7 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -43,4 +43,6 @@ source "drivers/staging/echo/Kconfig"

source "drivers/staging/at76_usb/Kconfig"

+source "drivers/staging/pcc-acpi/Kconfig"
+
endif # STAGING
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 325bca4..e5c4a38 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -13,3 +13,4 @@ obj-$(CONFIG_W35UND) += winbond/
obj-$(CONFIG_PRISM2_USB) += wlan-ng/
obj-$(CONFIG_ECHO) += echo/
obj-$(CONFIG_USB_ATMEL) += at76_usb/
+obj-$(CONFIG_PCC_ACPI) += pcc-acpi/
diff --git a/drivers/staging/pcc-acpi/Kconfig b/drivers/staging/pcc-acpi/Kconfig
new file mode 100644
index 0000000..6720d40
--- /dev/null
+++ b/drivers/staging/pcc-acpi/Kconfig
@@ -0,0 +1,11 @@
+config PCC_ACPI
+ tristate "Panasonic ACPI Hotkey support"
+ depends on ACPI
+ default n
+ ---help---
+ This driver provides support for Panasonic hotkeys through the
+ ACPI interface. This works for the Panasonic R1 (N variant),
+ R2, R3, T2, W2, and Y2 laptops.
+
+ To compile this driver as a module, choose M here. The module
+ will be called pcc-acpi.
diff --git a/drivers/staging/pcc-acpi/Makefile b/drivers/staging/pcc-acpi/Makefile
new file mode 100644
index 0000000..f93b29e
--- /dev/null
+++ b/drivers/staging/pcc-acpi/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_PCC_ACPI) += pcc-acpi.o
diff --git a/drivers/staging/pcc-acpi/TODO b/drivers/staging/pcc-acpi/TODO
new file mode 100644
index 0000000..fab2409
--- /dev/null
+++ b/drivers/staging/pcc-acpi/TODO
@@ -0,0 +1,7 @@
+TODO:
+ - Lindent fixes
+ - checkpatch.pl fixes
+ - verify that the acpi interface is correct
+ - remove /proc dependancy if needed (not sure yet.)
+
+Please send any patches for this driver to Greg Kroah-Hartman <greg@xxxxxxxxx>
diff --git a/drivers/staging/pcc-acpi/pcc-acpi.c b/drivers/staging/pcc-acpi/pcc-acpi.c
new file mode 100644
index 0000000..ffda32a
--- /dev/null
+++ b/drivers/staging/pcc-acpi/pcc-acpi.c
@@ -0,0 +1,974 @@
+/*
+ * 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) 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@xxxxxxxxxx>
+ * -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@xxxxxxxxxx>
+ * -v0.8.4 follow to change keyinput structure
+ * thanks Fabian Yamaguchi <fabs@xxxxxxxxxxxxxxx>,
+ * Jacob Bower <jacob.bower@xxxxxxxx> and
+ * Hiroshi Yokota for providing solutions.
+ *
+ * Oct.02, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * -v0.8.2 merge code of YOKOTA Hiroshi <yokota@xxxxxxxxxxxxxxxxxxxxxxx>.
+ * Add sticky key mode interface.
+ * Refactoring acpi_pcc_generete_keyinput().
+ *
+ * Sep.15, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * -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@xxxxxxxxxx>
+ * -v0.7 Change proc interface functions using seq_file
+ * facility as same as other ACPI drivers.
+ *
+ * Aug.28, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * -v0.6.4 Fix a silly error with status checking
+ *
+ * Aug.25, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * -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@xxxxxxxxxxxxxx>
+ * -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@xxxxxxxxxxxxxx>
+ * -v0.6.1 Fix a silly error with status checking
+ *
+ * Aug.20, 2004 David Bronaugh <dbronaugh@xxxxxxxxxxxxxx>
+ * - 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@xxxxxxxxxx>
+ * - v0.5 support LCD brightness control
+ * based on the disclosed information by MEI.
+ *
+ * Jul.25, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * - v0.4 first post version
+ * add function to retrive SIFR
+ *
+ * Jul.24, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * - v0.3 get proper status of hotkey
+ *
+ * Jul.22, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * - v0.2 add HotKey handler
+ *
+ * Jul.17, 2004 Hiroshi Miura <miura@xxxxxxxxxx>
+ * - v0.1 start from toshiba_acpi driver written by John Belmonte
+ *
+ */
+
+#define ACPI_PCC_VERSION "0.9"
+
+#include <linux/version.h>
+#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 <asm/uaccess.h>
+#include <acpi/acpi_bus.h>
+#include <acpi/acpi_drivers.h>
+#include <linux/input.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");
+MODULE_DESCRIPTION("ACPI HotKey driver for Panasonic Lets 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 Extra Driver"
+#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
+
+/* 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, /* 1 */
+ SINF_AC_MAX_BRIGHT, SINF_AC_MIN_BRIGHT, SINF_AC_CUR_BRIGHT, /* 2, 3, 4 */
+ /* 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, /* 5, 6, 7 */
+ SINF_MUTE,
+ SINF_RESERVED, SINF_ENV_STATE, /* 9, 10 */
+ SINF_STICKY_KEY = 0x80,
+};
+
+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 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,
+ },
+};
+
+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)
+{
+ 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;
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_write_sset");
+
+ status = acpi_evaluate_object(hotkey->handle, METHOD_HKEY_SSET, &params, NULL);
+
+ return_VALUE(status == AE_OK);
+}
+
+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"));
+ return_VALUE(0);
+ }
+
+ hkey = buffer.pointer;
+ if (!hkey || (hkey->type != ACPI_TYPE_PACKAGE)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid HKEY.SINF\n"));
+ goto end;
+ }
+
+ if (hotkey->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_VALUE(status == AE_OK);
+}
+
+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);
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_read_sinf_field");
+
+ if (!sinf) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate %li bytes\n",
+ sizeof(u32) * hotkey->num_sifr));
+ return_VALUE(0);
+ }
+
+ if (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"));
+ }
+
+ kfree(sinf);
+ return_VALUE(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_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(0);
+ }
+
+ 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 = (struct acpi_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 = (struct acpi_hotkey *) seq->private;
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_version_show");
+
+ if (!hotkey || !hotkey->device)
+ return 0;
+
+ 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, "%i", &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 = kmalloc(sizeof(u32) * (hotkey->num_sifr + 1), GFP_KERNEL);
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_write_brightness");
+
+ if (!hotkey || (count > sizeof(write_string) - 1))
+ return_VALUE(-EINVAL);
+
+ if (!sinf) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate %li bytes\n",
+ sizeof(u32) * hotkey->num_sifr));
+ return_VALUE(-EFAULT);
+ }
+
+ if (copy_from_user(write_string, buffer, count))
+ return_VALUE(-EFAULT);
+
+ write_string[count] = '\0';
+
+ if (!acpi_pcc_retrieve_biosdata(hotkey, sinf)) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't 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_VALUE(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_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 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;
+
+ 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, "%i", &key_mode) == 1 && (key_mode == 0 || key_mode == 1)) {
+ keyinput = (struct pcc_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);
+
+typedef struct file_operations fops_t;
+static fops_t acpi_pcc_numbatteries_fops = SEQ_FILEOPS_R (acpi_pcc_numbatteries_open_fs);
+static fops_t acpi_pcc_lcdtype_fops = SEQ_FILEOPS_R (acpi_pcc_lcdtype_open_fs);
+static fops_t acpi_pcc_mute_fops = SEQ_FILEOPS_RW(acpi_pcc_mute_open_fs, acpi_pcc_write_mute);
+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);
+static fops_t acpi_pcc_brightness_fops = SEQ_FILEOPS_RW(acpi_pcc_brightness_open_fs, acpi_pcc_write_no_brightness);
+static fops_t acpi_pcc_sticky_key_fops = SEQ_FILEOPS_RW(acpi_pcc_sticky_key_open_fs, acpi_pcc_write_sticky_key);
+static fops_t acpi_pcc_keyinput_fops = SEQ_FILEOPS_RW(acpi_pcc_keyinput_open_fs, acpi_pcc_write_keyinput);
+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 },
+ { "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 },
+};
+
+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 acpi_pcc_add_device(struct acpi_device *device,
+ ProcItem *proc_items,
+ int num)
+{
+ struct proc_dir_entry* proc;
+ ProcItem* item;
+ int i;
+ struct acpi_hotkey *hotkey = (struct acpi_hotkey*)acpi_driver_data(device);
+
+ 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 acpi_pcc_proc_init(struct acpi_device *device)
+{
+ struct proc_dir_entry* acpi_pcc_dir;
+ struct acpi_hotkey *hotkey = (struct acpi_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, 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_VALUE(-ENODEV);
+ }
+
+ return_VALUE(status);
+}
+
+static void 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 acpi_pcc_init_input(struct acpi_hotkey *hotkey)
+{
+ struct input_dev *hotk_input_dev;
+ struct pcc_keyinput *pcc_keyinput;
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_init_input");
+
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,15)
+ hotk_input_dev = input_allocate_device();
+ if (!hotk_input_dev) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate input device for hotkey"));
+ return_VALUE(-ENOMEM);
+ }
+#else
+ hotk_input_dev = kcalloc(1, sizeof(struct input_dev),GFP_KERNEL);
+ if (hotk_input_dev == NULL) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey"));
+ return_VALUE(-ENOMEM);
+ }
+#endif
+
+ 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 hotkey"));
+ input_unregister_device(hotk_input_dev);
+ return_VALUE(-ENOMEM);
+ }
+
+ 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 = 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;
+
+ input_set_drvdata(hotk_input_dev, pcc_keyinput);
+
+ hotkey->input_dev = hotk_input_dev;
+
+
+ input_register_device(hotk_input_dev);
+
+ return_VALUE(0);
+}
+
+/* --------------------------------------------------------------------------
+ module init
+ -------------------------------------------------------------------------- */
+
+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); }
+
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Sticky mode restore: %d\n", hotkey->sticky_mode));
+
+ status = acpi_pcc_write_sset(hotkey, SINF_STICKY_KEY, hotkey->sticky_mode);
+
+ return_VALUE(status == AE_OK ? 0 : -EINVAL);
+}
+
+static int acpi_pcc_hotkey_add (struct acpi_device *device)
+{
+ acpi_status status = AE_OK;
+ struct acpi_hotkey *hotkey = NULL;
+ int num_sifr, result;
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_hotkey_add");
+
+ if (!device) {
+ return_VALUE(-EINVAL);
+ }
+
+ num_sifr = acpi_pcc_get_sqty(device);
+
+ if (num_sifr > 255) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "num_sifr too large"));
+ return_VALUE(-ENODEV);
+ }
+
+ hotkey = kmalloc(sizeof(struct acpi_hotkey), GFP_KERNEL);
+ if (!hotkey) {
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Couldn't allocate mem for hotkey"));
+ return_VALUE(-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), 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) {
+ 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 __init acpi_pcc_init(void)
+{
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_pcc_init");
+
+ if (acpi_disabled) {
+ 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(0);
+}
+
+module_init(acpi_pcc_init);
+
+static int 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, 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))
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Error removing notify handler\n"));
+
+ input_unregister_device(hotkey->input_dev);
+
+ kfree(hotkey);
+ return_VALUE(status == AE_OK);
+}
+
+static void __exit acpi_pcc_exit(void)
+{
+ ACPI_FUNCTION_TRACE("acpi_pcc_exit");
+
+ acpi_bus_unregister_driver(&acpi_pcc_driver);
+
+ return_VOID;
+}
+
+module_exit(acpi_pcc_exit);
--
1.6.0.2

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