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-rw-r--r--drivers/platform/x86/asus_acpi.c1513
1 files changed, 1513 insertions, 0 deletions
diff --git a/drivers/platform/x86/asus_acpi.c b/drivers/platform/x86/asus_acpi.c
new file mode 100644
index 00000000..d9312b30
--- /dev/null
+++ b/drivers/platform/x86/asus_acpi.c
@@ -0,0 +1,1513 @@
+/*
+ * asus_acpi.c - Asus Laptop ACPI Extras
+ *
+ *
+ * Copyright (C) 2002-2005 Julien Lerouge, 2003-2006 Karol Kozimor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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
+ *
+ *
+ * The development page for this driver is located at
+ * http://sourceforge.net/projects/acpi4asus/
+ *
+ * Credits:
+ * Pontus Fuchs - Helper functions, cleanup
+ * Johann Wiesner - Small compile fixes
+ * John Belmonte - ACPI code for Toshiba laptop was a good starting point.
+ * �ic Burghard - LED display support for W1N
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/backlight.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+#include <asm/uaccess.h>
+
+#define ASUS_ACPI_VERSION "0.30"
+
+#define PROC_ASUS "asus" /* The directory */
+#define PROC_MLED "mled"
+#define PROC_WLED "wled"
+#define PROC_TLED "tled"
+#define PROC_BT "bluetooth"
+#define PROC_LEDD "ledd"
+#define PROC_INFO "info"
+#define PROC_LCD "lcd"
+#define PROC_BRN "brn"
+#define PROC_DISP "disp"
+
+#define ACPI_HOTK_NAME "Asus Laptop ACPI Extras Driver"
+#define ACPI_HOTK_CLASS "hotkey"
+#define ACPI_HOTK_DEVICE_NAME "Hotkey"
+
+/*
+ * Some events we use, same for all Asus
+ */
+#define BR_UP 0x10
+#define BR_DOWN 0x20
+
+/*
+ * Flags for hotk status
+ */
+#define MLED_ON 0x01 /* Mail LED */
+#define WLED_ON 0x02 /* Wireless LED */
+#define TLED_ON 0x04 /* Touchpad LED */
+#define BT_ON 0x08 /* Internal Bluetooth */
+
+MODULE_AUTHOR("Julien Lerouge, Karol Kozimor");
+MODULE_DESCRIPTION(ACPI_HOTK_NAME);
+MODULE_LICENSE("GPL");
+
+static uid_t asus_uid;
+static gid_t asus_gid;
+module_param(asus_uid, uint, 0);
+MODULE_PARM_DESC(asus_uid, "UID for entries in /proc/acpi/asus");
+module_param(asus_gid, uint, 0);
+MODULE_PARM_DESC(asus_gid, "GID for entries in /proc/acpi/asus");
+
+/* For each model, all features implemented,
+ * those marked with R are relative to HOTK, A for absolute */
+struct model_data {
+ char *name; /* name of the laptop________________A */
+ char *mt_mled; /* method to handle mled_____________R */
+ char *mled_status; /* node to handle mled reading_______A */
+ char *mt_wled; /* method to handle wled_____________R */
+ char *wled_status; /* node to handle wled reading_______A */
+ char *mt_tled; /* method to handle tled_____________R */
+ char *tled_status; /* node to handle tled reading_______A */
+ char *mt_ledd; /* method to handle LED display______R */
+ char *mt_bt_switch; /* method to switch Bluetooth on/off_R */
+ char *bt_status; /* no model currently supports this__? */
+ char *mt_lcd_switch; /* method to turn LCD on/off_________A */
+ char *lcd_status; /* node to read LCD panel state______A */
+ char *brightness_up; /* method to set brightness up_______A */
+ char *brightness_down; /* method to set brightness down ____A */
+ char *brightness_set; /* method to set absolute brightness_R */
+ char *brightness_get; /* method to get absolute brightness_R */
+ char *brightness_status;/* node to get brightness____________A */
+ char *display_set; /* method to set video output________R */
+ char *display_get; /* method to get video output________R */
+};
+
+/*
+ * This is the main structure, we can use it to store anything interesting
+ * about the hotk device
+ */
+struct asus_hotk {
+ struct acpi_device *device; /* the device we are in */
+ acpi_handle handle; /* the handle of the hotk device */
+ char status; /* status of the hotk, for LEDs */
+ u32 ledd_status; /* status of the LED display */
+ struct model_data *methods; /* methods available on the laptop */
+ u8 brightness; /* brightness level */
+ enum {
+ A1x = 0, /* A1340D, A1300F */
+ A2x, /* A2500H */
+ A4G, /* A4700G */
+ D1x, /* D1 */
+ L2D, /* L2000D */
+ L3C, /* L3800C */
+ L3D, /* L3400D */
+ L3H, /* L3H, L2000E, L5D */
+ L4R, /* L4500R */
+ L5x, /* L5800C */
+ L8L, /* L8400L */
+ M1A, /* M1300A */
+ M2E, /* M2400E, L4400L */
+ M6N, /* M6800N, W3400N */
+ M6R, /* M6700R, A3000G */
+ P30, /* Samsung P30 */
+ S1x, /* S1300A, but also L1400B and M2400A (L84F) */
+ S2x, /* S200 (J1 reported), Victor MP-XP7210 */
+ W1N, /* W1000N */
+ W5A, /* W5A */
+ W3V, /* W3030V */
+ xxN, /* M2400N, M3700N, M5200N, M6800N,
+ S1300N, S5200N*/
+ A4S, /* Z81sp */
+ F3Sa, /* (Centrino) */
+ R1F,
+ END_MODEL
+ } model; /* Models currently supported */
+ u16 event_count[128]; /* Count for each event TODO make this better */
+};
+
+/* Here we go */
+#define A1x_PREFIX "\\_SB.PCI0.ISA.EC0."
+#define L3C_PREFIX "\\_SB.PCI0.PX40.ECD0."
+#define M1A_PREFIX "\\_SB.PCI0.PX40.EC0."
+#define P30_PREFIX "\\_SB.PCI0.LPCB.EC0."
+#define S1x_PREFIX "\\_SB.PCI0.PX40."
+#define S2x_PREFIX A1x_PREFIX
+#define xxN_PREFIX "\\_SB.PCI0.SBRG.EC0."
+
+static struct model_data model_conf[END_MODEL] = {
+ /*
+ * TODO I have seen a SWBX and AIBX method on some models, like L1400B,
+ * it seems to be a kind of switch, but what for ?
+ */
+
+ {
+ .name = "A1x",
+ .mt_mled = "MLED",
+ .mled_status = "\\MAIL",
+ .mt_lcd_switch = A1x_PREFIX "_Q10",
+ .lcd_status = "\\BKLI",
+ .brightness_up = A1x_PREFIX "_Q0E",
+ .brightness_down = A1x_PREFIX "_Q0F"},
+
+ {
+ .name = "A2x",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .wled_status = "\\SG66",
+ .mt_lcd_switch = "\\Q10",
+ .lcd_status = "\\BAOF",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "A4G",
+ .mt_mled = "MLED",
+/* WLED present, but not controlled by ACPI */
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\ADVG"},
+
+ {
+ .name = "D1x",
+ .mt_mled = "MLED",
+ .mt_lcd_switch = "\\Q0D",
+ .lcd_status = "\\GP11",
+ .brightness_up = "\\Q0C",
+ .brightness_down = "\\Q0B",
+ .brightness_status = "\\BLVL",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "L2D",
+ .mt_mled = "MLED",
+ .mled_status = "\\SGP6",
+ .mt_wled = "WLED",
+ .wled_status = "\\RCP3",
+ .mt_lcd_switch = "\\Q10",
+ .lcd_status = "\\SGP0",
+ .brightness_up = "\\Q0E",
+ .brightness_down = "\\Q0F",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "L3C",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = L3C_PREFIX "_Q10",
+ .lcd_status = "\\GL32",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\_SB.PCI0.PCI1.VGAC.NMAP"},
+
+ {
+ .name = "L3D",
+ .mt_mled = "MLED",
+ .mled_status = "\\MALD",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = "\\Q10",
+ .lcd_status = "\\BKLG",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "L3H",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = "EHK",
+ .lcd_status = "\\_SB.PCI0.PM.PBC",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "L4R",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .wled_status = "\\_SB.PCI0.SBRG.SG13",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
+
+ {
+ .name = "L5x",
+ .mt_mled = "MLED",
+/* WLED present, but not controlled by ACPI */
+ .mt_tled = "TLED",
+ .mt_lcd_switch = "\\Q0D",
+ .lcd_status = "\\BAOF",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "L8L"
+/* No features, but at least support the hotkeys */
+ },
+
+ {
+ .name = "M1A",
+ .mt_mled = "MLED",
+ .mt_lcd_switch = M1A_PREFIX "Q10",
+ .lcd_status = "\\PNOF",
+ .brightness_up = M1A_PREFIX "Q0E",
+ .brightness_down = M1A_PREFIX "Q0F",
+ .brightness_status = "\\BRIT",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "M2E",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = "\\Q10",
+ .lcd_status = "\\GP06",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "M6N",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .wled_status = "\\_SB.PCI0.SBRG.SG13",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\_SB.BKLT",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\SSTE"},
+
+ {
+ .name = "M6R",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\_SB.PCI0.SBSM.SEO4",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\_SB.PCI0.P0P1.VGA.GETD"},
+
+ {
+ .name = "P30",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = P30_PREFIX "_Q0E",
+ .lcd_status = "\\BKLT",
+ .brightness_up = P30_PREFIX "_Q68",
+ .brightness_down = P30_PREFIX "_Q69",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\DNXT"},
+
+ {
+ .name = "S1x",
+ .mt_mled = "MLED",
+ .mled_status = "\\EMLE",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = S1x_PREFIX "Q10",
+ .lcd_status = "\\PNOF",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV"},
+
+ {
+ .name = "S2x",
+ .mt_mled = "MLED",
+ .mled_status = "\\MAIL",
+ .mt_lcd_switch = S2x_PREFIX "_Q10",
+ .lcd_status = "\\BKLI",
+ .brightness_up = S2x_PREFIX "_Q0B",
+ .brightness_down = S2x_PREFIX "_Q0A"},
+
+ {
+ .name = "W1N",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_ledd = "SLCM",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\BKLT",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\ADVG"},
+
+ {
+ .name = "W5A",
+ .mt_bt_switch = "BLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\ADVG"},
+
+ {
+ .name = "W3V",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\BKLT",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"},
+
+ {
+ .name = "xxN",
+ .mt_mled = "MLED",
+/* WLED present, but not controlled by ACPI */
+ .mt_lcd_switch = xxN_PREFIX "_Q10",
+ .lcd_status = "\\BKLT",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\ADVG"},
+
+ {
+ .name = "A4S",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .mt_bt_switch = "BLED",
+ .mt_wled = "WLED"
+ },
+
+ {
+ .name = "F3Sa",
+ .mt_bt_switch = "BLED",
+ .mt_wled = "WLED",
+ .mt_mled = "MLED",
+ .brightness_get = "GPLV",
+ .brightness_set = "SPLV",
+ .mt_lcd_switch = "\\_SB.PCI0.SBRG.EC0._Q10",
+ .lcd_status = "\\_SB.PCI0.SBRG.EC0.RPIN",
+ .display_get = "\\ADVG",
+ .display_set = "SDSP",
+ },
+ {
+ .name = "R1F",
+ .mt_bt_switch = "BLED",
+ .mt_mled = "MLED",
+ .mt_wled = "WLED",
+ .mt_lcd_switch = "\\Q10",
+ .lcd_status = "\\GP06",
+ .brightness_set = "SPLV",
+ .brightness_get = "GPLV",
+ .display_set = "SDSP",
+ .display_get = "\\INFB"
+ }
+};
+
+/* procdir we use */
+static struct proc_dir_entry *asus_proc_dir;
+
+static struct backlight_device *asus_backlight_device;
+
+/*
+ * This header is made available to allow proper configuration given model,
+ * revision number , ... this info cannot go in struct asus_hotk because it is
+ * available before the hotk
+ */
+static struct acpi_table_header *asus_info;
+
+/* The actual device the driver binds to */
+static struct asus_hotk *hotk;
+
+/*
+ * The hotkey driver and autoloading declaration
+ */
+static int asus_hotk_add(struct acpi_device *device);
+static int asus_hotk_remove(struct acpi_device *device, int type);
+static void asus_hotk_notify(struct acpi_device *device, u32 event);
+
+static const struct acpi_device_id asus_device_ids[] = {
+ {"ATK0100", 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, asus_device_ids);
+
+static struct acpi_driver asus_hotk_driver = {
+ .name = "asus_acpi",
+ .class = ACPI_HOTK_CLASS,
+ .owner = THIS_MODULE,
+ .ids = asus_device_ids,
+ .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
+ .ops = {
+ .add = asus_hotk_add,
+ .remove = asus_hotk_remove,
+ .notify = asus_hotk_notify,
+ },
+};
+
+/*
+ * This function evaluates an ACPI method, given an int as parameter, the
+ * method is searched within the scope of the handle, can be NULL. The output
+ * of the method is written is output, which can also be NULL
+ *
+ * returns 1 if write is successful, 0 else.
+ */
+static int write_acpi_int(acpi_handle handle, const char *method, int val,
+ struct acpi_buffer *output)
+{
+ struct acpi_object_list params; /* list of input parameters (int) */
+ union acpi_object in_obj; /* the only param we use */
+ acpi_status status;
+
+ params.count = 1;
+ params.pointer = &in_obj;
+ in_obj.type = ACPI_TYPE_INTEGER;
+ in_obj.integer.value = val;
+
+ status = acpi_evaluate_object(handle, (char *)method, &params, output);
+ return (status == AE_OK);
+}
+
+static int read_acpi_int(acpi_handle handle, const char *method, int *val)
+{
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+ acpi_status status;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+
+ status = acpi_evaluate_object(handle, (char *)method, NULL, &output);
+ *val = out_obj.integer.value;
+ return (status == AE_OK) && (out_obj.type == ACPI_TYPE_INTEGER);
+}
+
+static int asus_info_proc_show(struct seq_file *m, void *v)
+{
+ int temp;
+
+ seq_printf(m, ACPI_HOTK_NAME " " ASUS_ACPI_VERSION "\n");
+ seq_printf(m, "Model reference : %s\n", hotk->methods->name);
+ /*
+ * The SFUN method probably allows the original driver to get the list
+ * of features supported by a given model. For now, 0x0100 or 0x0800
+ * bit signifies that the laptop is equipped with a Wi-Fi MiniPCI card.
+ * The significance of others is yet to be found.
+ */
+ if (read_acpi_int(hotk->handle, "SFUN", &temp))
+ seq_printf(m, "SFUN value : 0x%04x\n", temp);
+ /*
+ * Another value for userspace: the ASYM method returns 0x02 for
+ * battery low and 0x04 for battery critical, its readings tend to be
+ * more accurate than those provided by _BST.
+ * Note: since not all the laptops provide this method, errors are
+ * silently ignored.
+ */
+ if (read_acpi_int(hotk->handle, "ASYM", &temp))
+ seq_printf(m, "ASYM value : 0x%04x\n", temp);
+ if (asus_info) {
+ seq_printf(m, "DSDT length : %d\n", asus_info->length);
+ seq_printf(m, "DSDT checksum : %d\n", asus_info->checksum);
+ seq_printf(m, "DSDT revision : %d\n", asus_info->revision);
+ seq_printf(m, "OEM id : %.*s\n", ACPI_OEM_ID_SIZE, asus_info->oem_id);
+ seq_printf(m, "OEM table id : %.*s\n", ACPI_OEM_TABLE_ID_SIZE, asus_info->oem_table_id);
+ seq_printf(m, "OEM revision : 0x%x\n", asus_info->oem_revision);
+ seq_printf(m, "ASL comp vendor id : %.*s\n", ACPI_NAME_SIZE, asus_info->asl_compiler_id);
+ seq_printf(m, "ASL comp revision : 0x%x\n", asus_info->asl_compiler_revision);
+ }
+
+ return 0;
+}
+
+static int asus_info_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, asus_info_proc_show, NULL);
+}
+
+static const struct file_operations asus_info_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = asus_info_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+/*
+ * /proc handlers
+ * We write our info in page, we begin at offset off and cannot write more
+ * than count bytes. We set eof to 1 if we handle those 2 values. We return the
+ * number of bytes written in page
+ */
+
+/* Generic LED functions */
+static int read_led(const char *ledname, int ledmask)
+{
+ if (ledname) {
+ int led_status;
+
+ if (read_acpi_int(NULL, ledname, &led_status))
+ return led_status;
+ else
+ pr_warn("Error reading LED status\n");
+ }
+ return (hotk->status & ledmask) ? 1 : 0;
+}
+
+static int parse_arg(const char __user *buf, unsigned long count, int *val)
+{
+ char s[32];
+ if (!count)
+ return 0;
+ if (count > 31)
+ return -EINVAL;
+ if (copy_from_user(s, buf, count))
+ return -EFAULT;
+ s[count] = 0;
+ if (sscanf(s, "%i", val) != 1)
+ return -EINVAL;
+ return count;
+}
+
+/* FIXME: kill extraneous args so it can be called independently */
+static int
+write_led(const char __user *buffer, unsigned long count,
+ char *ledname, int ledmask, int invert)
+{
+ int rv, value;
+ int led_out = 0;
+
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
+ led_out = value ? 1 : 0;
+
+ hotk->status =
+ (led_out) ? (hotk->status | ledmask) : (hotk->status & ~ledmask);
+
+ if (invert) /* invert target value */
+ led_out = !led_out;
+
+ if (!write_acpi_int(hotk->handle, ledname, led_out, NULL))
+ pr_warn("LED (%s) write failed\n", ledname);
+
+ return rv;
+}
+
+/*
+ * Proc handlers for MLED
+ */
+static int mled_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", read_led(hotk->methods->mled_status, MLED_ON));
+ return 0;
+}
+
+static int mled_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, mled_proc_show, NULL);
+}
+
+static ssize_t mled_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ return write_led(buffer, count, hotk->methods->mt_mled, MLED_ON, 1);
+}
+
+static const struct file_operations mled_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = mled_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = mled_proc_write,
+};
+
+/*
+ * Proc handlers for LED display
+ */
+static int ledd_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "0x%08x\n", hotk->ledd_status);
+ return 0;
+}
+
+static int ledd_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, ledd_proc_show, NULL);
+}
+
+static ssize_t ledd_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ int rv, value;
+
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0) {
+ if (!write_acpi_int
+ (hotk->handle, hotk->methods->mt_ledd, value, NULL))
+ pr_warn("LED display write failed\n");
+ else
+ hotk->ledd_status = (u32) value;
+ }
+ return rv;
+}
+
+static const struct file_operations ledd_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = ledd_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = ledd_proc_write,
+};
+
+/*
+ * Proc handlers for WLED
+ */
+static int wled_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", read_led(hotk->methods->wled_status, WLED_ON));
+ return 0;
+}
+
+static int wled_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, wled_proc_show, NULL);
+}
+
+static ssize_t wled_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ return write_led(buffer, count, hotk->methods->mt_wled, WLED_ON, 0);
+}
+
+static const struct file_operations wled_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = wled_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = wled_proc_write,
+};
+
+/*
+ * Proc handlers for Bluetooth
+ */
+static int bluetooth_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", read_led(hotk->methods->bt_status, BT_ON));
+ return 0;
+}
+
+static int bluetooth_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, bluetooth_proc_show, NULL);
+}
+
+static ssize_t bluetooth_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *pos)
+{
+ /* Note: mt_bt_switch controls both internal Bluetooth adapter's
+ presence and its LED */
+ return write_led(buffer, count, hotk->methods->mt_bt_switch, BT_ON, 0);
+}
+
+static const struct file_operations bluetooth_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = bluetooth_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = bluetooth_proc_write,
+};
+
+/*
+ * Proc handlers for TLED
+ */
+static int tled_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", read_led(hotk->methods->tled_status, TLED_ON));
+ return 0;
+}
+
+static int tled_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, tled_proc_show, NULL);
+}
+
+static ssize_t tled_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ return write_led(buffer, count, hotk->methods->mt_tled, TLED_ON, 0);
+}
+
+static const struct file_operations tled_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = tled_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = tled_proc_write,
+};
+
+static int get_lcd_state(void)
+{
+ int lcd = 0;
+
+ if (hotk->model == L3H) {
+ /* L3H and the like have to be handled differently */
+ acpi_status status = 0;
+ struct acpi_object_list input;
+ union acpi_object mt_params[2];
+ struct acpi_buffer output;
+ union acpi_object out_obj;
+
+ input.count = 2;
+ input.pointer = mt_params;
+ /* Note: the following values are partly guessed up, but
+ otherwise they seem to work */
+ mt_params[0].type = ACPI_TYPE_INTEGER;
+ mt_params[0].integer.value = 0x02;
+ mt_params[1].type = ACPI_TYPE_INTEGER;
+ mt_params[1].integer.value = 0x02;
+
+ output.length = sizeof(out_obj);
+ output.pointer = &out_obj;
+
+ status =
+ acpi_evaluate_object(NULL, hotk->methods->lcd_status,
+ &input, &output);
+ if (status != AE_OK)
+ return -1;
+ if (out_obj.type == ACPI_TYPE_INTEGER)
+ /* That's what the AML code does */
+ lcd = out_obj.integer.value >> 8;
+ } else if (hotk->model == F3Sa) {
+ unsigned long long tmp;
+ union acpi_object param;
+ struct acpi_object_list input;
+ acpi_status status;
+
+ /* Read pin 11 */
+ param.type = ACPI_TYPE_INTEGER;
+ param.integer.value = 0x11;
+ input.count = 1;
+ input.pointer = &param;
+
+ status = acpi_evaluate_integer(NULL, hotk->methods->lcd_status,
+ &input, &tmp);
+ if (status != AE_OK)
+ return -1;
+
+ lcd = tmp;
+ } else {
+ /* We don't have to check anything if we are here */
+ if (!read_acpi_int(NULL, hotk->methods->lcd_status, &lcd))
+ pr_warn("Error reading LCD status\n");
+
+ if (hotk->model == L2D)
+ lcd = ~lcd;
+ }
+
+ return (lcd & 1);
+}
+
+static int set_lcd_state(int value)
+{
+ int lcd = 0;
+ acpi_status status = 0;
+
+ lcd = value ? 1 : 0;
+ if (lcd != get_lcd_state()) {
+ /* switch */
+ if (hotk->model != L3H) {
+ status =
+ acpi_evaluate_object(NULL,
+ hotk->methods->mt_lcd_switch,
+ NULL, NULL);
+ } else {
+ /* L3H and the like must be handled differently */
+ if (!write_acpi_int
+ (hotk->handle, hotk->methods->mt_lcd_switch, 0x07,
+ NULL))
+ status = AE_ERROR;
+ /* L3H's AML executes EHK (0x07) upon Fn+F7 keypress,
+ the exact behaviour is simulated here */
+ }
+ if (ACPI_FAILURE(status))
+ pr_warn("Error switching LCD\n");
+ }
+ return 0;
+
+}
+
+static int lcd_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", get_lcd_state());
+ return 0;
+}
+
+static int lcd_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, lcd_proc_show, NULL);
+}
+
+static ssize_t lcd_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ int rv, value;
+
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
+ set_lcd_state(value);
+ return rv;
+}
+
+static const struct file_operations lcd_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = lcd_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = lcd_proc_write,
+};
+
+static int read_brightness(struct backlight_device *bd)
+{
+ int value;
+
+ if (hotk->methods->brightness_get) { /* SPLV/GPLV laptop */
+ if (!read_acpi_int(hotk->handle, hotk->methods->brightness_get,
+ &value))
+ pr_warn("Error reading brightness\n");
+ } else if (hotk->methods->brightness_status) { /* For D1 for example */
+ if (!read_acpi_int(NULL, hotk->methods->brightness_status,
+ &value))
+ pr_warn("Error reading brightness\n");
+ } else /* No GPLV method */
+ value = hotk->brightness;
+ return value;
+}
+
+/*
+ * Change the brightness level
+ */
+static int set_brightness(int value)
+{
+ acpi_status status = 0;
+ int ret = 0;
+
+ /* SPLV laptop */
+ if (hotk->methods->brightness_set) {
+ if (!write_acpi_int(hotk->handle, hotk->methods->brightness_set,
+ value, NULL)) {
+ pr_warn("Error changing brightness\n");
+ ret = -EIO;
+ }
+ goto out;
+ }
+
+ /* No SPLV method if we are here, act as appropriate */
+ value -= read_brightness(NULL);
+ while (value != 0) {
+ status = acpi_evaluate_object(NULL, (value > 0) ?
+ hotk->methods->brightness_up :
+ hotk->methods->brightness_down,
+ NULL, NULL);
+ (value > 0) ? value-- : value++;
+ if (ACPI_FAILURE(status)) {
+ pr_warn("Error changing brightness\n");
+ ret = -EIO;
+ }
+ }
+out:
+ return ret;
+}
+
+static int set_brightness_status(struct backlight_device *bd)
+{
+ return set_brightness(bd->props.brightness);
+}
+
+static int brn_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", read_brightness(NULL));
+ return 0;
+}
+
+static int brn_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, brn_proc_show, NULL);
+}
+
+static ssize_t brn_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ int rv, value;
+
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0) {
+ value = (0 < value) ? ((15 < value) ? 15 : value) : 0;
+ /* 0 <= value <= 15 */
+ set_brightness(value);
+ }
+ return rv;
+}
+
+static const struct file_operations brn_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = brn_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = brn_proc_write,
+};
+
+static void set_display(int value)
+{
+ /* no sanity check needed for now */
+ if (!write_acpi_int(hotk->handle, hotk->methods->display_set,
+ value, NULL))
+ pr_warn("Error setting display\n");
+ return;
+}
+
+/*
+ * Now, *this* one could be more user-friendly, but so far, no-one has
+ * complained. The significance of bits is the same as in proc_write_disp()
+ */
+static int disp_proc_show(struct seq_file *m, void *v)
+{
+ int value = 0;
+
+ if (!read_acpi_int(hotk->handle, hotk->methods->display_get, &value))
+ pr_warn("Error reading display status\n");
+ value &= 0x07; /* needed for some models, shouldn't hurt others */
+ seq_printf(m, "%d\n", value);
+ return 0;
+}
+
+static int disp_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, disp_proc_show, NULL);
+}
+
+/*
+ * Experimental support for display switching. As of now: 1 should activate
+ * the LCD output, 2 should do for CRT, and 4 for TV-Out. Any combination
+ * (bitwise) of these will suffice. I never actually tested 3 displays hooked
+ * up simultaneously, so be warned. See the acpi4asus README for more info.
+ */
+static ssize_t disp_proc_write(struct file *file, const char __user *buffer,
+ size_t count, loff_t *pos)
+{
+ int rv, value;
+
+ rv = parse_arg(buffer, count, &value);
+ if (rv > 0)
+ set_display(value);
+ return rv;
+}
+
+static const struct file_operations disp_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = disp_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = disp_proc_write,
+};
+
+static int
+asus_proc_add(char *name, const struct file_operations *proc_fops, mode_t mode,
+ struct acpi_device *device)
+{
+ struct proc_dir_entry *proc;
+
+ proc = proc_create_data(name, mode, acpi_device_dir(device),
+ proc_fops, acpi_driver_data(device));
+ if (!proc) {
+ pr_warn(" Unable to create %s fs entry\n", name);
+ return -1;
+ }
+ proc->uid = asus_uid;
+ proc->gid = asus_gid;
+ return 0;
+}
+
+static int asus_hotk_add_fs(struct acpi_device *device)
+{
+ struct proc_dir_entry *proc;
+ mode_t mode;
+
+ if ((asus_uid == 0) && (asus_gid == 0)) {
+ mode = S_IFREG | S_IRUGO | S_IWUSR | S_IWGRP;
+ } else {
+ mode = S_IFREG | S_IRUSR | S_IRGRP | S_IWUSR | S_IWGRP;
+ pr_warn(" asus_uid and asus_gid parameters are "
+ "deprecated, use chown and chmod instead!\n");
+ }
+
+ acpi_device_dir(device) = asus_proc_dir;
+ if (!acpi_device_dir(device))
+ return -ENODEV;
+
+ proc = proc_create(PROC_INFO, mode, acpi_device_dir(device),
+ &asus_info_proc_fops);
+ if (proc) {
+ proc->uid = asus_uid;
+ proc->gid = asus_gid;
+ } else {
+ pr_warn(" Unable to create " PROC_INFO " fs entry\n");
+ }
+
+ if (hotk->methods->mt_wled) {
+ asus_proc_add(PROC_WLED, &wled_proc_fops, mode, device);
+ }
+
+ if (hotk->methods->mt_ledd) {
+ asus_proc_add(PROC_LEDD, &ledd_proc_fops, mode, device);
+ }
+
+ if (hotk->methods->mt_mled) {
+ asus_proc_add(PROC_MLED, &mled_proc_fops, mode, device);
+ }
+
+ if (hotk->methods->mt_tled) {
+ asus_proc_add(PROC_TLED, &tled_proc_fops, mode, device);
+ }
+
+ if (hotk->methods->mt_bt_switch) {
+ asus_proc_add(PROC_BT, &bluetooth_proc_fops, mode, device);
+ }
+
+ /*
+ * We need both read node and write method as LCD switch is also
+ * accessible from the keyboard
+ */
+ if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status) {
+ asus_proc_add(PROC_LCD, &lcd_proc_fops, mode, device);
+ }
+
+ if ((hotk->methods->brightness_up && hotk->methods->brightness_down) ||
+ (hotk->methods->brightness_get && hotk->methods->brightness_set)) {
+ asus_proc_add(PROC_BRN, &brn_proc_fops, mode, device);
+ }
+
+ if (hotk->methods->display_set) {
+ asus_proc_add(PROC_DISP, &disp_proc_fops, mode, device);
+ }
+
+ return 0;
+}
+
+static int asus_hotk_remove_fs(struct acpi_device *device)
+{
+ if (acpi_device_dir(device)) {
+ remove_proc_entry(PROC_INFO, acpi_device_dir(device));
+ if (hotk->methods->mt_wled)
+ remove_proc_entry(PROC_WLED, acpi_device_dir(device));
+ if (hotk->methods->mt_mled)
+ remove_proc_entry(PROC_MLED, acpi_device_dir(device));
+ if (hotk->methods->mt_tled)
+ remove_proc_entry(PROC_TLED, acpi_device_dir(device));
+ if (hotk->methods->mt_ledd)
+ remove_proc_entry(PROC_LEDD, acpi_device_dir(device));
+ if (hotk->methods->mt_bt_switch)
+ remove_proc_entry(PROC_BT, acpi_device_dir(device));
+ if (hotk->methods->mt_lcd_switch && hotk->methods->lcd_status)
+ remove_proc_entry(PROC_LCD, acpi_device_dir(device));
+ if ((hotk->methods->brightness_up
+ && hotk->methods->brightness_down)
+ || (hotk->methods->brightness_get
+ && hotk->methods->brightness_set))
+ remove_proc_entry(PROC_BRN, acpi_device_dir(device));
+ if (hotk->methods->display_set)
+ remove_proc_entry(PROC_DISP, acpi_device_dir(device));
+ }
+ return 0;
+}
+
+static void asus_hotk_notify(struct acpi_device *device, u32 event)
+{
+ /* TODO Find a better way to handle events count. */
+ if (!hotk)
+ return;
+
+ /*
+ * The BIOS *should* be sending us device events, but apparently
+ * Asus uses system events instead, so just ignore any device
+ * events we get.
+ */
+ if (event > ACPI_MAX_SYS_NOTIFY)
+ return;
+
+ if ((event & ~((u32) BR_UP)) < 16)
+ hotk->brightness = (event & ~((u32) BR_UP));
+ else if ((event & ~((u32) BR_DOWN)) < 16)
+ hotk->brightness = (event & ~((u32) BR_DOWN));
+
+ acpi_bus_generate_proc_event(hotk->device, event,
+ hotk->event_count[event % 128]++);
+
+ return;
+}
+
+/*
+ * Match the model string to the list of supported models. Return END_MODEL if
+ * no match or model is NULL.
+ */
+static int asus_model_match(char *model)
+{
+ if (model == NULL)
+ return END_MODEL;
+
+ if (strncmp(model, "L3D", 3) == 0)
+ return L3D;
+ else if (strncmp(model, "L2E", 3) == 0 ||
+ strncmp(model, "L3H", 3) == 0 || strncmp(model, "L5D", 3) == 0)
+ return L3H;
+ else if (strncmp(model, "L3", 2) == 0 || strncmp(model, "L2B", 3) == 0)
+ return L3C;
+ else if (strncmp(model, "L8L", 3) == 0)
+ return L8L;
+ else if (strncmp(model, "L4R", 3) == 0)
+ return L4R;
+ else if (strncmp(model, "M6N", 3) == 0 || strncmp(model, "W3N", 3) == 0)
+ return M6N;
+ else if (strncmp(model, "M6R", 3) == 0 || strncmp(model, "A3G", 3) == 0)
+ return M6R;
+ else if (strncmp(model, "M2N", 3) == 0 ||
+ strncmp(model, "M3N", 3) == 0 ||
+ strncmp(model, "M5N", 3) == 0 ||
+ strncmp(model, "S1N", 3) == 0 ||
+ strncmp(model, "S5N", 3) == 0)
+ return xxN;
+ else if (strncmp(model, "M1", 2) == 0)
+ return M1A;
+ else if (strncmp(model, "M2", 2) == 0 || strncmp(model, "L4E", 3) == 0)
+ return M2E;
+ else if (strncmp(model, "L2", 2) == 0)
+ return L2D;
+ else if (strncmp(model, "L8", 2) == 0)
+ return S1x;
+ else if (strncmp(model, "D1", 2) == 0)
+ return D1x;
+ else if (strncmp(model, "A1", 2) == 0)
+ return A1x;
+ else if (strncmp(model, "A2", 2) == 0)
+ return A2x;
+ else if (strncmp(model, "J1", 2) == 0)
+ return S2x;
+ else if (strncmp(model, "L5", 2) == 0)
+ return L5x;
+ else if (strncmp(model, "A4G", 3) == 0)
+ return A4G;
+ else if (strncmp(model, "W1N", 3) == 0)
+ return W1N;
+ else if (strncmp(model, "W3V", 3) == 0)
+ return W3V;
+ else if (strncmp(model, "W5A", 3) == 0)
+ return W5A;
+ else if (strncmp(model, "R1F", 3) == 0)
+ return R1F;
+ else if (strncmp(model, "A4S", 3) == 0)
+ return A4S;
+ else if (strncmp(model, "F3Sa", 4) == 0)
+ return F3Sa;
+ else
+ return END_MODEL;
+}
+
+/*
+ * This function is used to initialize the hotk with right values. In this
+ * method, we can make all the detection we want, and modify the hotk struct
+ */
+static int asus_hotk_get_info(void)
+{
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ union acpi_object *model = NULL;
+ int bsts_result;
+ char *string = NULL;
+ acpi_status status;
+
+ /*
+ * Get DSDT headers early enough to allow for differentiating between
+ * models, but late enough to allow acpi_bus_register_driver() to fail
+ * before doing anything ACPI-specific. Should we encounter a machine,
+ * which needs special handling (i.e. its hotkey device has a different
+ * HID), this bit will be moved. A global variable asus_info contains
+ * the DSDT header.
+ */
+ status = acpi_get_table(ACPI_SIG_DSDT, 1, &asus_info);
+ if (ACPI_FAILURE(status))
+ pr_warn(" Couldn't get the DSDT table header\n");
+
+ /* We have to write 0 on init this far for all ASUS models */
+ if (!write_acpi_int(hotk->handle, "INIT", 0, &buffer)) {
+ pr_err(" Hotkey initialization failed\n");
+ return -ENODEV;
+ }
+
+ /* This needs to be called for some laptops to init properly */
+ if (!read_acpi_int(hotk->handle, "BSTS", &bsts_result))
+ pr_warn(" Error calling BSTS\n");
+ else if (bsts_result)
+ pr_notice(" BSTS called, 0x%02x returned\n", bsts_result);
+
+ /*
+ * Try to match the object returned by INIT to the specific model.
+ * Handle every possible object (or the lack of thereof) the DSDT
+ * writers might throw at us. When in trouble, we pass NULL to
+ * asus_model_match() and try something completely different.
+ */
+ if (buffer.pointer) {
+ model = buffer.pointer;
+ switch (model->type) {
+ case ACPI_TYPE_STRING:
+ string = model->string.pointer;
+ break;
+ case ACPI_TYPE_BUFFER:
+ string = model->buffer.pointer;
+ break;
+ default:
+ kfree(model);
+ model = NULL;
+ break;
+ }
+ }
+ hotk->model = asus_model_match(string);
+ if (hotk->model == END_MODEL) { /* match failed */
+ if (asus_info &&
+ strncmp(asus_info->oem_table_id, "ODEM", 4) == 0) {
+ hotk->model = P30;
+ pr_notice(" Samsung P30 detected, supported\n");
+ hotk->methods = &model_conf[hotk->model];
+ kfree(model);
+ return 0;
+ } else {
+ hotk->model = M2E;
+ pr_notice(" unsupported model %s, trying default values\n",
+ string);
+ pr_notice(" send /proc/acpi/dsdt to the developers\n");
+ kfree(model);
+ return -ENODEV;
+ }
+ }
+ hotk->methods = &model_conf[hotk->model];
+ pr_notice(" %s model detected, supported\n", string);
+
+ /* Sort of per-model blacklist */
+ if (strncmp(string, "L2B", 3) == 0)
+ hotk->methods->lcd_status = NULL;
+ /* L2B is similar enough to L3C to use its settings, with this only
+ exception */
+ else if (strncmp(string, "A3G", 3) == 0)
+ hotk->methods->lcd_status = "\\BLFG";
+ /* A3G is like M6R */
+ else if (strncmp(string, "S5N", 3) == 0 ||
+ strncmp(string, "M5N", 3) == 0 ||
+ strncmp(string, "W3N", 3) == 0)
+ hotk->methods->mt_mled = NULL;
+ /* S5N, M5N and W3N have no MLED */
+ else if (strncmp(string, "L5D", 3) == 0)
+ hotk->methods->mt_wled = NULL;
+ /* L5D's WLED is not controlled by ACPI */
+ else if (strncmp(string, "M2N", 3) == 0 ||
+ strncmp(string, "W3V", 3) == 0 ||
+ strncmp(string, "S1N", 3) == 0)
+ hotk->methods->mt_wled = "WLED";
+ /* M2N, S1N and W3V have a usable WLED */
+ else if (asus_info) {
+ if (strncmp(asus_info->oem_table_id, "L1", 2) == 0)
+ hotk->methods->mled_status = NULL;
+ /* S1300A reports L84F, but L1400B too, account for that */
+ }
+
+ kfree(model);
+
+ return 0;
+}
+
+static int asus_hotk_check(void)
+{
+ int result = 0;
+
+ result = acpi_bus_get_status(hotk->device);
+ if (result)
+ return result;
+
+ if (hotk->device->status.present) {
+ result = asus_hotk_get_info();
+ } else {
+ pr_err(" Hotkey device not present, aborting\n");
+ return -EINVAL;
+ }
+
+ return result;
+}
+
+static int asus_hotk_found;
+
+static int asus_hotk_add(struct acpi_device *device)
+{
+ acpi_status status = AE_OK;
+ int result;
+
+ pr_notice("Asus Laptop ACPI Extras version %s\n", ASUS_ACPI_VERSION);
+
+ hotk = kzalloc(sizeof(struct asus_hotk), GFP_KERNEL);
+ if (!hotk)
+ return -ENOMEM;
+
+ hotk->handle = device->handle;
+ strcpy(acpi_device_name(device), ACPI_HOTK_DEVICE_NAME);
+ strcpy(acpi_device_class(device), ACPI_HOTK_CLASS);
+ device->driver_data = hotk;
+ hotk->device = device;
+
+ result = asus_hotk_check();
+ if (result)
+ goto end;
+
+ result = asus_hotk_add_fs(device);
+ if (result)
+ goto end;
+
+ /* For laptops without GPLV: init the hotk->brightness value */
+ if ((!hotk->methods->brightness_get)
+ && (!hotk->methods->brightness_status)
+ && (hotk->methods->brightness_up && hotk->methods->brightness_down)) {
+ status =
+ acpi_evaluate_object(NULL, hotk->methods->brightness_down,
+ NULL, NULL);
+ if (ACPI_FAILURE(status))
+ pr_warn(" Error changing brightness\n");
+ else {
+ status =
+ acpi_evaluate_object(NULL,
+ hotk->methods->brightness_up,
+ NULL, NULL);
+ if (ACPI_FAILURE(status))
+ pr_warn(" Strange, error changing brightness\n");
+ }
+ }
+
+ asus_hotk_found = 1;
+
+ /* LED display is off by default */
+ hotk->ledd_status = 0xFFF;
+
+end:
+ if (result)
+ kfree(hotk);
+
+ return result;
+}
+
+static int asus_hotk_remove(struct acpi_device *device, int type)
+{
+ asus_hotk_remove_fs(device);
+
+ kfree(hotk);
+
+ return 0;
+}
+
+static const struct backlight_ops asus_backlight_data = {
+ .get_brightness = read_brightness,
+ .update_status = set_brightness_status,
+};
+
+static void asus_acpi_exit(void)
+{
+ if (asus_backlight_device)
+ backlight_device_unregister(asus_backlight_device);
+
+ acpi_bus_unregister_driver(&asus_hotk_driver);
+ remove_proc_entry(PROC_ASUS, acpi_root_dir);
+
+ return;
+}
+
+static int __init asus_acpi_init(void)
+{
+ struct backlight_properties props;
+ int result;
+
+ result = acpi_bus_register_driver(&asus_hotk_driver);
+ if (result < 0)
+ return result;
+
+ asus_proc_dir = proc_mkdir(PROC_ASUS, acpi_root_dir);
+ if (!asus_proc_dir) {
+ pr_err("Unable to create /proc entry\n");
+ acpi_bus_unregister_driver(&asus_hotk_driver);
+ return -ENODEV;
+ }
+
+ /*
+ * This is a bit of a kludge. We only want this module loaded
+ * for ASUS systems, but there's currently no way to probe the
+ * ACPI namespace for ASUS HIDs. So we just return failure if
+ * we didn't find one, which will cause the module to be
+ * unloaded.
+ */
+ if (!asus_hotk_found) {
+ acpi_bus_unregister_driver(&asus_hotk_driver);
+ remove_proc_entry(PROC_ASUS, acpi_root_dir);
+ return -ENODEV;
+ }
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.type = BACKLIGHT_PLATFORM;
+ props.max_brightness = 15;
+ asus_backlight_device = backlight_device_register("asus", NULL, NULL,
+ &asus_backlight_data,
+ &props);
+ if (IS_ERR(asus_backlight_device)) {
+ pr_err("Could not register asus backlight device\n");
+ asus_backlight_device = NULL;
+ asus_acpi_exit();
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+module_init(asus_acpi_init);
+module_exit(asus_acpi_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 00:13:08 +0000