* [RFC][PATCH 1/5] ACPI: acer_acpi: Add acer_acpi driver
2007-07-17 14:44 [RFC][PATCH 0/5] ACPI: acer_acpi Carlos Corbacho
@ 2007-07-17 14:45 ` Carlos Corbacho
2007-07-19 0:58 ` [RFC][PATCH 0/5] ACPI: acer_acpi Len Brown
1 sibling, 0 replies; 6+ messages in thread
From: Carlos Corbacho @ 2007-07-17 14:45 UTC (permalink / raw)
To: linux-acpi
Add the acer_acpi driver - this driver supports many recent (2005 and later)
Acer laptops that provide a PNP0C14 _HID device through ACPI. It enables
controlling wireless, bluetooth, backlight and mail LED on supported models.
Signed-off-by: Carlos Corbacho <cathectic@gmail.com>
---
drivers/misc/acer_acpi.c | 1110 ++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 1110 insertions(+), 0 deletions(-)
diff --git a/drivers/misc/acer_acpi.c b/drivers/misc/acer_acpi.c
new file mode 100644
index 0000000..954c7d9
--- /dev/null
+++ b/drivers/misc/acer_acpi.c
@@ -0,0 +1,1110 @@
+/*
+ * acer_acpi.c - Acer Laptop ACPI Extras
+ *
+ *
+ * Copyright (C) 2005-2007 E.M. Smith
+ * Copyright (C) 2007 Carlos Corbacho <cathectic@gmail.com>
+ *
+ * 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 devolpment page for this driver is located at
+ * http://code.google.com/p/aceracpi
+ *
+ * Credits:
+ *
+ * The authors of laptop ACPI modules in the kernel
+ * - their work was an inspiration and a source of good code
+ * Olaf Tauber
+ * - developer of acerhk, the inspiration to solve the 64-bit
+ * driver problem for [Mark Smith's] Aspire 5024.
+ * Mathieu Segaud
+ * - solved the ACPI problem that needed a double-modprobe in
+ * acer_acpi 0.2 and below.
+ * Jim Ramsay
+ * - Figured out and added support for WMID, added generic
+ * interface code
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/delay.h>
+#include <linux/backlight.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+#include <linux/uaccess.h>
+#include <linux/preempt.h>
+#include <linux/io.h>
+#include <linux/dmi.h>
+
+#include <acpi/acpi_drivers.h>
+
+MODULE_AUTHOR("Mark Smith, Carlos Corbacho");
+MODULE_DESCRIPTION("Acer Laptop ACPI Extras Driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Defining this enables the 3g interface on the new WMID interface.
+ *
+ * However, there are many reports of this not working (and no reports of it
+ * working), so this is for experienced users only.
+ */
+#undef EXPERIMENTAL_INTERFACES
+
+#define ACER_LOGPREFIX "acer_acpi: "
+
+#define DEBUG(level, message...) \
+ do { \
+ if (debug >= level) \
+ printk(KERN_DEBUG ACER_LOGPREFIX message); \
+ } while (0);
+
+/*
+ * On the 5580, brightness values range from 0x0 to 0xf, inclusive.
+ * This may vary on other machines or other interfaces.
+ */
+#define ACER_MAX_BRIGHTNESS 0xf
+
+/*
+ * These laptops are known to require a keyboard quirk to make their
+ * multimedia keys emit scancodes
+ */
+static struct dmi_system_id keyboard_dmi_table[] = {
+ {
+ .ident = "Acer Aspire 5680",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5680"),
+ },
+ },
+ { }
+};
+
+/*
+ * Keyboard controller ports
+ */
+#define ACER_KBD_STATUS_REG 0x64 /* Status register (R) */
+#define ACER_KBD_CNTL_REG 0x64 /* Controller command register (W) */
+#define ACER_KBD_DATA_REG 0x60 /* Keyboard data register (R/W) */
+
+/*
+ * AMW0 EC Magic Number
+ * This number is required for writing to ACPI
+ * (it's also used in acerhk when directly accessing the EC)
+ */
+#define ACER_WRITE 0x9610
+
+/*
+ * Bit masks for the old AMW0 interface
+ */
+#define ACER_AMW0_WIRELESS_MASK 0x35
+#define ACER_AMW0_BLUETOOTH_MASK 0x34
+#define ACER_AMW0_MAILLED_MASK 0x31
+
+/*
+ * Method IDs for new WMID interface
+ * These could be different for other untested machines
+ */
+#define ACER_WMID_GET_WIRELESS_METHODID 1
+#define ACER_WMID_GET_BLUETOOTH_METHODID 2
+#define ACER_WMID_GET_BRIGHTNESS_METHODID 3
+#define ACER_WMID_SET_WIRELESS_METHODID 4
+#define ACER_WMID_SET_BLUETOOTH_METHODID 5
+#define ACER_WMID_SET_BRIGHTNESS_METHODID 6
+#define ACER_WMID_GET_THREEG_METHODID 10
+#define ACER_WMID_SET_THREEG_METHODID 11
+
+/*
+ * Acer ACPI method paths
+ *
+ * TODO: It may be possbile to autodetect these, since these are all at HID
+ * PNP0C14
+ */
+#define AMW0_METHOD "\\_SB_.AMW0.WMAB"
+#define AMW0_GETDATA "\\_SB_.AMW0._WED"
+
+#define WMID_METHOD "\\_SB.WMID.WMBA"
+#define WMID_GETDATA "\\_SB.WMID._WED"
+
+/*
+ * Interface capability flags
+ */
+#define ACER_CAP_MAILLED (1<<0)
+#define ACER_CAP_WIRELESS (1<<1)
+#define ACER_CAP_BLUETOOTH (1<<2)
+#define ACER_CAP_BRIGHTNESS (1<<3)
+#define ACER_CAP_THREEG (1<<4)
+#define ACER_CAP_ANY (0xffffffff)
+
+/*
+ * Interface type flags
+ */
+#define ACER_AMW0 (1<<0)
+#define ACER_WMID (1<<1)
+
+/*
+ * Presumed start states -
+ * For the AMW0 interface, there is no way to know for certain what the start
+ * state is for any of the devices (ACPI does not provide any methods or store
+ * this anywhere, and a device state will persist across a reboot).
+ *
+ * The driver therefore changes from the unknown state to a known state (off)
+ * (Acer software just waits for the user to press the device button, as the
+ * scancode for the button changes when the device state is changed).
+ *
+ * Also, we can't yet tell which features are enabled or disabled on a specific
+ * model, just ranges; but we don't have enough information on the models, so we
+ * currently unconditionally enable all supported devices on a given interface.
+ *
+ * Basically the code works like this:
+ * - On init, any values specified on the commandline are set.
+ * - For interfaces where the current values cannot be detected and which
+ * have not been set on the commandline, we set them to some sane default
+ * (disabled)
+ *
+ * See AMW0_init and acer_commandline_init
+ */
+
+#define ACER_DEFAULT_WIRELESS 0
+#define ACER_DEFAULT_BLUETOOTH 0
+#define ACER_DEFAULT_MAILLED 0
+#define ACER_DEFAULT_THREEG 0
+#define ACER_DEFAULT_BRIGHTNESS ACER_MAX_BRIGHTNESS
+
+static int wireless = -1;
+static int bluetooth = -1;
+static int mailled = -1;
+static int brightness = -1;
+static int threeg = -1;
+static int debug;
+
+module_param(mailled, int, 0444);
+module_param(wireless, int, 0444);
+module_param(bluetooth, int, 0444);
+module_param(brightness, int, 0444);
+module_param(threeg, int, 0444);
+module_param(debug, int, 0664);
+MODULE_PARM_DESC(wireless, "Set initial state of Wireless hardware");
+MODULE_PARM_DESC(bluetooth, "Set initial state of Bluetooth hardware");
+MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
+MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
+MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
+MODULE_PARM_DESC(debug, "Debugging verbosity level (0=least 2=most)");
+
+static int is_valid_acpi_path(const char *methodName)
+{
+ acpi_handle handle;
+ acpi_status status;
+
+ status = acpi_get_handle(NULL, (char *)methodName, &handle);
+ return ACPI_SUCCESS(status);
+}
+
+/* Each low-level interface must define at least some of the following */
+struct Interface {
+ /*
+ * The ACPI device type
+ */
+ uint32_t type;
+
+
+ /*
+ * The capabilities this interface provides
+ * In the future, these can be removed/added at runtime when we have a
+ * way of detecting what capabilities are /actually/ present on an
+ * interface
+ */
+ uint32_t capability;
+
+ /*
+ * Initializes an interface, should allocate the interface-specific
+ * data
+ */
+ void (*init) (struct Interface *);
+
+ /*
+ * Frees an interface, should free the interface-specific data
+ */
+ void (*free) (struct Interface *);
+
+ /*
+ * Gets and sets various data types.
+ * First paramater: Value to set, or pointer to place got value into
+ * Second parameter: Specific capability being requested
+ * Third paramater: Pointer to this interface
+ */
+ acpi_status (*get_bool) (bool *, uint32_t, struct Interface *);
+ acpi_status (*set_bool) (bool, uint32_t, struct Interface *);
+ acpi_status (*get_u8) (uint8_t *, uint32_t, struct Interface *);
+ acpi_status (*set_u8) (uint8_t, uint32_t, struct Interface *);
+
+ /*
+ * Interface-specific private data member. Must *not* be touched by
+ * anyone outside of this struct
+ */
+ void *data;
+};
+
+/* The static interface pointer, points to the currently detected interface */
+static struct Interface *interface;
+
+/*
+ * General interface convenience methods
+ */
+
+static bool has_cap(uint32_t cap)
+{
+ if ((interface->capability & cap) != 0) {
+ return 1;
+ }
+ return 0;
+}
+
+static void interface_free(struct Interface *iface)
+{
+ /* Free our private data structure */
+ kfree(iface->data);
+}
+
+/* These *_via_u8 use the interface's *_u8 methods to emulate other gets/sets */
+static acpi_status get_bool_via_u8(bool *value, uint32_t cap,
+ struct Interface *iface)
+{
+ acpi_status status;
+ uint8_t result;
+
+ status = iface->get_u8(&result, cap, iface);
+
+ if (ACPI_SUCCESS(status))
+ *value = (result != 0);
+
+ return status;
+}
+
+static acpi_status set_bool_via_u8(bool value, uint32_t cap,
+ struct Interface *iface)
+{
+ uint8_t v = value ? 1 : 0;
+
+ return iface->set_u8(v, cap, iface);
+}
+
+/* General wrapper around the ACPI call */
+static acpi_status
+WMI_execute(char *methodPath, uint32_t methodId, const struct acpi_buffer *in,
+ struct acpi_buffer *out)
+{
+ struct acpi_object_list input;
+ union acpi_object params[3];
+ acpi_status status = AE_OK;
+
+ /* WMI calling convention:
+ * methodPath( instance, methodId, input_buffer )
+ * - instance is always 1, since there's only this module
+ * - methodId is the method number within the current method group.
+ * - Input buffer is ignored for read-only commands
+ * - May return a buffer of results (optional)
+ */
+ input.count = 3;
+ input.pointer = params;
+ params[0].type = ACPI_TYPE_INTEGER;
+ params[0].integer.value = 0x01;
+ params[1].type = ACPI_TYPE_INTEGER;
+ params[1].integer.value = methodId;
+ params[2].type = ACPI_TYPE_BUFFER;
+ params[2].buffer.length = in->length;
+ params[2].buffer.pointer = in->pointer;
+
+ DEBUG(2, "Doing %s( 1, %u, [%llu-byte buffer] )\n", methodPath,
+ methodId, (uint64_t)in->length);
+
+ status = acpi_evaluate_object(NULL, methodPath, &input, out);
+
+ DEBUG(2, " Execution status: %d\n", status);
+ DEBUG(2, " Result: %llu bytes\n", (uint64_t)(out ? out->length : 0) );
+
+ return status;
+}
+
+/*
+ * Keyboard quirk
+ */
+
+/*
+ * Wait for the keyboard controller to become ready
+ */
+static int wait_kbd_write(void)
+{
+ int i = 0;
+ while ((inb(ACER_KBD_STATUS_REG) & 0x02) && (i < 10000)) {
+ udelay(50);
+ i++;
+ }
+ return -(i == 10000);
+}
+
+static void set_keyboard_quirk(void)
+{
+ preempt_disable();
+ if (!wait_kbd_write()) {
+ outb(0x59, ACER_KBD_CNTL_REG);
+ if (!wait_kbd_write())
+ outb(0x90, ACER_KBD_DATA_REG);
+ } else {
+ printk(KERN_ERR ACER_LOGPREFIX "Unable to apply keyboard \
+ quirk\n");
+ }
+ preempt_enable_no_resched();
+}
+
+/*
+ * Check if this system requires the keyboard quirk to enable multimedia keys
+ */
+static bool keyboard_quirk(void)
+{
+ if (dmi_check_system(keyboard_dmi_table))
+ return 1;
+ return 0;
+}
+
+/*
+ * Old interface (now known as the AMW0 interface)
+ */
+struct WMAB_args {
+ u32 eax;
+ u32 ebx;
+ u32 ecx;
+ u32 edx;
+};
+
+struct AMW0_Data {
+ int mailled;
+ int wireless;
+ int bluetooth;
+};
+
+static acpi_status WMAB_execute(struct WMAB_args *regbuf,
+ struct acpi_buffer *result)
+{
+ struct acpi_buffer input;
+ acpi_status status;
+ input.length = sizeof(struct WMAB_args);
+ input.pointer = (u8 *)regbuf;
+
+ status = WMI_execute( AMW0_METHOD, 1, &input, result);
+ DEBUG(2, " Args: 0x%08x 0x%08x 0x%08x 0x%08x\n", regbuf->eax,
+ regbuf->ebx, regbuf->ecx, regbuf->edx );
+
+ return status;
+}
+
+static void AMW0_init(struct Interface *iface)
+{
+ struct AMW0_Data *data;
+
+ /* Allocate our private data structure */
+ iface->data = kmalloc(sizeof(struct AMW0_Data), GFP_KERNEL);
+ data = (struct AMW0_Data *)iface->data;
+
+ /*
+ * If the commandline doesn't specify these, we need to force them to
+ * the default values
+ */
+ if (mailled == -1)
+ mailled = ACER_DEFAULT_MAILLED;
+ if (wireless == -1)
+ wireless = ACER_DEFAULT_WIRELESS;
+ if (bluetooth == -1)
+ bluetooth = ACER_DEFAULT_BLUETOOTH;
+
+ /*
+ * Set the cached "current" values to impossible ones so that
+ * acer_commandline_init will definitely set them.
+ */
+ data->wireless = data->mailled = data->bluetooth = -1;
+}
+
+static acpi_status AMW0_get_bool(bool *value, uint32_t cap,
+ struct Interface *iface)
+{
+ struct AMW0_Data *data = iface->data;
+
+ /*
+ * Currently no way to query the state, so just return the cached
+ * value
+ */
+ switch (cap) {
+ case ACER_CAP_MAILLED:
+ *value = data->mailled;
+ break;
+ case ACER_CAP_WIRELESS:
+ *value = data->wireless;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ *value = data->bluetooth;
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return AE_OK;
+}
+
+static acpi_status AMW0_set_bool(bool value, uint32_t cap,
+ struct Interface *iface)
+{
+ struct WMAB_args args;
+ acpi_status status;
+
+ args.eax = ACER_WRITE;
+ args.ebx = value ? (1<<8) : 0;
+
+ switch (cap) {
+ case ACER_CAP_MAILLED:
+ args.ebx |= ACER_AMW0_MAILLED_MASK;
+ break;
+ case ACER_CAP_WIRELESS:
+ args.ebx |= ACER_AMW0_WIRELESS_MASK;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ args.ebx |= ACER_AMW0_BLUETOOTH_MASK;
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+
+ /* Actually do the set */
+ status = WMAB_execute(&args, NULL);
+
+ /*
+ * Currently no way to query the state, so cache the new value on
+ * success
+ */
+ if (ACPI_SUCCESS(status)) {
+ struct AMW0_Data *data = iface->data;
+ switch (cap) {
+ case ACER_CAP_MAILLED:
+ data->mailled = value;
+ break;
+ case ACER_CAP_WIRELESS:
+ data->wireless = value;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ data->bluetooth = value;
+ break;
+ }
+ }
+
+ return status;
+}
+
+static struct Interface AMW0_interface = {
+ .type = ACER_AMW0,
+ .capability = (
+ ACER_CAP_MAILLED |
+ ACER_CAP_WIRELESS |
+ ACER_CAP_BLUETOOTH
+ ),
+ .init = AMW0_init,
+ .free = interface_free,
+ .get_bool = AMW0_get_bool,
+ .set_bool = AMW0_set_bool,
+};
+
+/*
+ * New interface (The WMID interface)
+ */
+struct WMID_Data {
+ int mailled;
+ int wireless;
+ int bluetooth;
+#ifdef EXPERIMENTAL_INTERFACES
+ int threeg;
+#endif
+ int brightness;
+};
+
+static void WMID_init(struct Interface *iface)
+{
+ struct WMID_Data *data;
+
+ /* Allocate our private data structure */
+ iface->data = kmalloc(sizeof(struct WMID_Data), GFP_KERNEL);
+ data = (struct WMID_Data *)iface->data;
+}
+
+static acpi_status WMI_execute_uint32(uint32_t methodId, uint32_t in,
+ uint32_t *out)
+{
+ struct acpi_buffer input = {(acpi_size)sizeof(uint32_t), (void *)(&in)};
+ struct acpi_buffer result = {ACPI_ALLOCATE_BUFFER, NULL};
+ union acpi_object *obj;
+ uint32_t tmp;
+ acpi_status status;
+
+ status = WMI_execute(WMID_METHOD, methodId, &input, &result);
+ DEBUG(2, " In: 0x%08x\n", in);
+
+ if (ACPI_FAILURE(status))
+ return status;
+
+ obj = (union acpi_object *)result.pointer;
+ if (obj && obj->type == ACPI_TYPE_BUFFER &&
+ obj->buffer.length == sizeof(uint32_t)) {
+ tmp = * ((uint32_t *)obj->buffer.pointer);
+ DEBUG(2, " Out: 0x%08x\n", tmp);
+ } else {
+ tmp = 0;
+ if (obj) {
+ DEBUG(2, " Got unexpected result of type %d\n",
+ obj->type);
+ } else {
+ DEBUG(2, " Got unexpected null result\n");
+ }
+ }
+
+ if (out)
+ *out = tmp;
+
+ if (result.length > 0 && result.pointer)
+ kfree(result.pointer);
+
+ return status;
+}
+
+static acpi_status WMID_get_u8(uint8_t *value, uint32_t cap,
+ struct Interface *iface)
+{
+ acpi_status status;
+ uint32_t result;
+ uint32_t methodId = 0;
+
+ switch (cap) {
+ case ACER_CAP_WIRELESS:
+ methodId = ACER_WMID_GET_WIRELESS_METHODID;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ methodId = ACER_WMID_GET_BLUETOOTH_METHODID;
+ break;
+ case ACER_CAP_BRIGHTNESS:
+ methodId = ACER_WMID_GET_BRIGHTNESS_METHODID;
+ break;
+ case ACER_CAP_THREEG:
+ methodId = ACER_WMID_GET_THREEG_METHODID;
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ status = WMI_execute_uint32(methodId, 0, &result);
+
+ if (ACPI_SUCCESS(status))
+ *value = (uint8_t)result;
+
+ return status;
+}
+
+static acpi_status WMID_set_u8(uint8_t value, uint32_t cap,
+ struct Interface *iface)
+{
+ uint32_t methodId = 0;
+
+ switch (cap) {
+ case ACER_CAP_BRIGHTNESS:
+ methodId = ACER_WMID_SET_BRIGHTNESS_METHODID;
+ break;
+ case ACER_CAP_WIRELESS:
+ methodId = ACER_WMID_SET_WIRELESS_METHODID;
+ break;
+ case ACER_CAP_BLUETOOTH:
+ methodId = ACER_WMID_SET_BLUETOOTH_METHODID;
+ break;
+ case ACER_CAP_THREEG:
+ methodId = ACER_WMID_SET_THREEG_METHODID;
+ break;
+ default:
+ return AE_BAD_ADDRESS;
+ }
+ return WMI_execute_uint32(methodId, (uint32_t)value, NULL);
+}
+
+
+static struct Interface WMID_interface = {
+ .type = ACER_WMID,
+ .capability = (
+ ACER_CAP_WIRELESS
+ | ACER_CAP_BRIGHTNESS
+ | ACER_CAP_BLUETOOTH
+#ifdef EXPERIMENTAL_INTERFACES
+ | ACER_CAP_THREEG
+#endif
+ ),
+ .init = WMID_init,
+ .free = interface_free,
+ .get_bool = get_bool_via_u8,
+ .set_bool = set_bool_via_u8,
+ .get_u8 = WMID_get_u8,
+ .set_u8 = WMID_set_u8,
+};
+
+/*
+ * Generic Device (interface-independent)
+ */
+
+static acpi_status get_bool(bool *value, uint32_t cap)
+{
+ acpi_status status = AE_BAD_ADDRESS;
+ if (interface->get_bool)
+ status = interface->get_bool(value, cap, interface);
+ return status;
+}
+
+static acpi_status set_bool(int value, uint32_t cap)
+{
+ acpi_status status = AE_BAD_PARAMETER;
+ if ((value == 0 || value == 1) &&
+ (interface->capability & cap)) {
+ if (interface->set_bool)
+ status = interface->set_bool(value == 1, cap,
+ interface);
+ }
+ return status;
+}
+
+static acpi_status get_u8(uint8_t *value, uint32_t cap)
+{
+ acpi_status status = AE_BAD_ADDRESS;
+ if (interface->get_u8)
+ status = interface->get_u8(value, cap, interface);
+ return status;
+}
+
+static acpi_status set_u8(uint8_t value, uint8_t min, uint8_t max, uint32_t cap)
+{
+ acpi_status status = AE_BAD_PARAMETER;
+ if ((value >= min && value <= max) &&
+ (interface->capability & cap) ) {
+ if (interface->get_u8) {
+ /* If possible, only set if the value has changed */
+ uint8_t actual;
+ status = interface->get_u8(&actual, cap, interface);
+ if (ACPI_SUCCESS(status) && actual == value)
+ return status;
+ }
+ if (interface->set_u8)
+ status = interface->set_u8(value, cap, interface);
+ }
+ return status;
+}
+
+/* Each _u8 needs a small wrapper that sets the boundary values */
+static acpi_status set_brightness(uint8_t value)
+{
+ return set_u8(value, 0, ACER_MAX_BRIGHTNESS, ACER_CAP_BRIGHTNESS);
+}
+
+static void acpi_commandline_init(void)
+{
+ DEBUG(1, "Commandline args: mailled(%d) wireless(%d) bluetooth(%d) \
+ brightness(%d)\n",
+ mailled, wireless, bluetooth, brightness);
+
+ /*
+ * These will all fail silently if the value given is invalid, or the
+ * capability isn't available on the given interface
+ */
+ set_bool(mailled, ACER_CAP_MAILLED);
+ set_bool(wireless, ACER_CAP_WIRELESS);
+ set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+ set_bool(threeg, ACER_CAP_THREEG);
+ set_brightness((uint8_t)brightness);
+}
+
+/*
+ * Backlight device (UNTESTED!)
+ */
+static struct backlight_device *acer_backlight_device;
+
+static int read_brightness(struct backlight_device *bd)
+{
+ uint8_t value;
+ get_u8(&value, ACER_CAP_BRIGHTNESS);
+ return value;
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+ set_brightness(bd->props.brightness);
+ return 0;
+}
+
+static struct backlight_ops acer_backlight_ops = {
+ .get_brightness = read_brightness,
+ .update_status = update_bl_status,
+};
+
+static int acer_backlight_init(struct device *dev)
+{
+ struct backlight_device *bd;
+
+ DEBUG(1, "Loading backlight driver\n");
+ bd = backlight_device_register("acer_acpi", dev,
+ NULL, &acer_backlight_ops);
+ if (IS_ERR(bd)) {
+ printk(KERN_ERR ACER_LOGPREFIX
+ "Could not register Acer backlight device\n");
+ acer_backlight_device = NULL;
+ return PTR_ERR(bd);
+ }
+
+ acer_backlight_device = bd;
+
+ bd->props.max_brightness = ACER_MAX_BRIGHTNESS;
+ bd->props.brightness = read_brightness(NULL);
+ backlight_update_status(bd);
+ return 0;
+}
+
+static void acer_backlight_exit(void)
+{
+ backlight_device_unregister(acer_backlight_device);
+}
+
+/*
+ * LED device (Mail LED only, no other LEDs known yet)
+ */
+static void mail_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ bool tmp = value;
+ set_bool(tmp, ACER_CAP_MAILLED);
+}
+
+static struct led_classdev mail_led = {
+ .name = "acer_acpi:mail",
+ .brightness_set = mail_led_set,
+};
+
+static void acer_led_init(struct device *dev)
+{
+ led_classdev_register(dev, &mail_led);
+}
+
+static void acer_led_exit(void)
+{
+ led_classdev_unregister(&mail_led);
+}
+
+/*
+ * Platform device
+ */
+
+#define show_set_bool(value, cap) \
+static ssize_t \
+show_bool_##value(struct device *dev, struct device_attribute *attr, \
+ char *buf) \
+{ \
+ bool result; \
+ acpi_status status = get_bool(&result, cap); \
+ if (ACPI_SUCCESS(status)) \
+ return sprintf(buf, "%d\n", result); \
+ return sprintf(buf, "Read error" ); \
+} \
+\
+static ssize_t \
+set_bool_##value(struct device *dev, struct device_attribute *attr, \
+ const char *buf, \
+ size_t count) \
+{ \
+ bool tmp = simple_strtoul(buf, NULL, 10); \
+ acpi_status status = set_bool(tmp, cap); \
+ if (ACPI_FAILURE(status)) \
+ return -EINVAL; \
+ return count; \
+} \
+static DEVICE_ATTR(value, S_IWUGO | S_IRUGO | S_IWUSR, \
+ show_bool_##value, set_bool_##value);
+
+show_set_bool(wireless, ACER_CAP_WIRELESS);
+show_set_bool(bluetooth, ACER_CAP_BLUETOOTH);
+#ifdef EXPERIMENTAL_INTERFACES
+show_set_bool(threeg, ACER_CAP_THREEG);
+#endif
+
+static struct platform_driver acer_platform_driver = {
+ .driver = {
+ .name = "acer_acpi",
+ .owner = THIS_MODULE,
+ }
+};
+
+static struct platform_device *acer_platform_device;
+
+static int remove_sysfs(struct platform_device *device)
+{
+ #define remove_device_file(value, cap) \
+ do { \
+ if (has_cap(cap)) \
+ device_remove_file(&device->dev, &dev_attr_##value); \
+ } while (0);
+
+ remove_device_file(wireless, ACER_CAP_WIRELESS);
+ remove_device_file(bluetooth, ACER_CAP_BLUETOOTH);
+#ifdef EXPERIMENTAL_INTERFACES
+ remove_device_file(threeg, ACER_CAP_THREEG);
+#endif
+ return 0;
+}
+
+static int acer_platform_add(void)
+{
+ int retval = -ENOMEM;
+ platform_driver_register(&acer_platform_driver);
+
+ acer_platform_device = platform_device_alloc("acer_acpi", -1);
+
+ platform_device_add(acer_platform_device);
+
+ #define add_device_file(value, cap) \
+ do { \
+ if (has_cap(cap)) {\
+ retval = device_create_file(\
+ &acer_platform_device->dev, &dev_attr_##value);\
+ if (retval)\
+ goto error;\
+ } \
+ } while (0);
+
+ add_device_file(wireless, ACER_CAP_WIRELESS);
+ add_device_file(bluetooth, ACER_CAP_BLUETOOTH);
+#ifdef EXPERIMENTAL_INTERFACES
+ add_device_file(threeg, ACER_CAP_THREEG);
+#endif
+
+ return 0;
+
+error:
+ remove_sysfs(acer_platform_device);
+ return retval;
+}
+
+static void acer_platform_remove(void)
+{
+ remove_sysfs(acer_platform_device);
+ platform_device_del(acer_platform_device);
+ platform_driver_unregister(&acer_platform_driver);
+}
+
+/*
+ * ACPI driver
+ */
+static int acer_acpi_add(struct acpi_device *device)
+{
+ struct device *dev = acpi_get_physical_device(device->handle);
+ acer_platform_add();
+ if (has_cap(ACER_CAP_MAILLED))
+ acer_led_init(dev);
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ acer_backlight_init(dev);
+ return 0;
+}
+
+static int acer_acpi_remove(struct acpi_device *device, int type)
+{
+ acer_platform_remove();
+
+ if (has_cap(ACER_CAP_MAILLED))
+ acer_led_exit();
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ acer_backlight_exit();
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int acer_acpi_suspend(struct acpi_device *device, pm_message_t state)
+{
+ /*
+ * WMID fix for suspend-to-disk - save all current states now so we can
+ * restore them on resume
+ */
+ bool value;
+ uint8_t u8value;
+
+ #define save_bool_device(device, cap) \
+ do { \
+ if (has_cap(cap)) {\
+ get_bool(&value, cap);\
+ data->device = value;\
+ } \
+ } while (0);
+
+ #define save_u8_device(device, cap) \
+ do { \
+ if (has_cap(cap)) {\
+ get_u8(&u8value, cap);\
+ data->device = u8value;\
+ } \
+ } while (0);
+
+ if (interface->type == ACER_WMID) {
+ struct WMID_Data *data = interface->data;
+ save_bool_device(wireless, ACER_CAP_WIRELESS);
+ save_bool_device(bluetooth, ACER_CAP_BLUETOOTH);
+#ifdef EXPERIMENTAL_INTERFACES
+ save_bool_device(threeg, ACER_CAP_THREEG);
+#endif
+ save_u8_device(brightness, ACER_CAP_BRIGHTNESS);
+ }
+
+ return 0;
+}
+
+static int acer_acpi_resume(struct acpi_device *device)
+{
+ #define restore_bool_device(device, cap) \
+ do { \
+ if (has_cap((cap)))\
+ set_bool(data->device, (cap));\
+ } while (0);
+
+ /*
+ * We must _always_ restore AMW0's values, otherwise the values
+ * after suspend-to-disk are wrong
+ */
+ if (interface->type == ACER_AMW0) {
+ struct AMW0_Data *data = interface->data;
+
+ restore_bool_device(wireless, ACER_CAP_WIRELESS);
+ restore_bool_device(bluetooth, ACER_CAP_BLUETOOTH);
+ restore_bool_device(mailled, ACER_CAP_MAILLED);
+ } else if (interface->type == ACER_WMID) {
+ struct WMID_Data *data = interface->data;
+
+ if (has_cap(ACER_CAP_BRIGHTNESS))
+ set_brightness((uint8_t)data->brightness);
+#ifdef EXPERIMENTAL_DEVICES
+ restore_bool_device(threeg, THREEG);
+#endif
+ restore_bool_device(wireless, ACER_CAP_WIRELESS);
+ restore_bool_device(bluetooth, ACER_CAP_BLUETOOTH);
+ }
+
+ /* Check if this laptop requires the keyboard quirk */
+ if (keyboard_quirk()) {
+ set_keyboard_quirk();
+ printk(KERN_INFO ACER_LOGPREFIX "Setting keyboard quirk to \
+ enable multimedia keys\n");
+ }
+
+ return 0;
+}
+#else
+#define acer_acpi_suspend NULL
+#define acer_acpi_resume NULL
+#endif
+
+static struct acpi_driver acer_acpi_driver = {
+ .name = "acer_acpi",
+ .class = "acer",
+ .ids = "PNP0C14",
+ .ops = {
+ .add = acer_acpi_add,
+ .remove = acer_acpi_remove,
+ .suspend = acer_acpi_suspend,
+ .resume = acer_acpi_resume,
+ },
+};
+
+static int __init acer_acpi_init(void)
+{
+ acpi_status status = AE_OK;
+
+ printk(KERN_INFO ACER_LOGPREFIX "Acer Laptop ACPI Extras\n");
+ if (acpi_disabled) {
+ printk(KERN_ERR ACER_LOGPREFIX "ACPI Disabled, unable to \
+ load.\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Detect which WMI interface we're using.
+ *
+ * TODO: This could be more dynamic, and perhaps done in part by the
+ * acpi_bus driver?
+ */
+ if (is_valid_acpi_path(AMW0_METHOD)) {
+ DEBUG(0, "Detected Acer AMW0 interface\n");
+ interface = &AMW0_interface;
+ /* .ids is case sensitive - and AMW0 has a mixed case device */
+ acer_acpi_driver.ids = "pnp0c14";
+ } else if (is_valid_acpi_path(WMID_METHOD)) {
+ DEBUG(0, "Detected Acer WMID interface\n");
+ interface = &WMID_interface;
+ } else {
+ printk(KERN_ERR ACER_LOGPREFIX "No or unsupported WMI \
+ interface, unable to load.\n");
+ goto error_no_interface;
+ }
+
+ /* Now that we have a known interface, initialize it */
+ if (interface->init)
+ interface->init(interface);
+
+ /*
+ * Register the driver
+ *
+ * TODO: Can we use the bus detection code to check for the interface
+ * or all or part of the method ID path?
+ */
+ status = acpi_bus_register_driver(&acer_acpi_driver);
+ if (ACPI_FAILURE(status)) {
+ printk(KERN_ERR ACER_LOGPREFIX "Unable to register driver, \
+ aborting.\n");
+ goto error_acpi_bus_register;
+ }
+
+ /* Check if this laptop requires the keyboard quirk */
+ if (keyboard_quirk()) {
+ set_keyboard_quirk();
+ printk(KERN_INFO ACER_LOGPREFIX "Setting keyboard quirk to \
+ enable multimedia keys\n");
+ }
+
+ /*
+ * Finally, override any initial settings with values from the
+ * command line
+ */
+ acpi_commandline_init();
+
+ return status;
+
+error_acpi_bus_register:
+error_no_interface:
+ return -ENODEV;
+}
+
+static void __exit acer_acpi_exit(void)
+{
+ acpi_bus_unregister_driver(&acer_acpi_driver);
+
+ if (interface->free)
+ interface->free(interface);
+
+ printk(KERN_INFO ACER_LOGPREFIX "Acer Laptop ACPI Extras unloaded\n");
+ return;
+}
+
+module_init(acer_acpi_init);
+module_exit(acer_acpi_exit);
--
1.4.2.1
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