Added an ACPI power and sleep button driver, similar in purpose to the one on BeBits. Will be used by a power management daemon that is not yet in CVS.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11459 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/drivers/Jamfile

@@ -9,5 +9,6 @@ SubInclude OBOS_TOP src add-ons kernel drivers input ;
 SubInclude OBOS_TOP src add-ons kernel drivers graphics ;
 SubInclude OBOS_TOP src add-ons kernel drivers misc ;
 SubInclude OBOS_TOP src add-ons kernel drivers network ;
+SubInclude OBOS_TOP src add-ons kernel drivers power ;
 SubInclude OBOS_TOP src add-ons kernel drivers random ;
 SubInclude OBOS_TOP src add-ons kernel drivers tty ;

src/add-ons/kernel/drivers/power/Jamfile

@@ -0,0 +1,3 @@
+SubDir OBOS_TOP src add-ons kernel drivers power ;
+
+SubInclude OBOS_TOP src add-ons kernel drivers power acpi_button ;

src/add-ons/kernel/drivers/power/acpi_button/Jamfile

@@ -0,0 +1,16 @@
+SubDir OBOS_TOP src add-ons kernel drivers power acpi_button ;
+
+R5KernelAddon acpi_button : kernel drivers bin :
+	acpi_button.c
+	;
+
+Depends acpi_button : acpi ;
+
+# Link driver(s) to kernel/drivers/dev/power
+{
+	local dir = [ FDirName $(OBOS_ADDON_DIR) kernel drivers dev power ] ;
+
+	local instDriver = <kernel!drivers!dev!power>acpi_button ;
+	MakeLocate $(instDriver) : $(dir) ;
+	RelSymLink $(instDriver) : acpi_button ;
+}

src/add-ons/kernel/drivers/power/acpi_button/acpi_button.c

@@ -0,0 +1,159 @@
+/* ++++++++++
+	ACPI Button Driver, used to get info on power buttons, etc.
++++++ */
+
+#include <KernelExport.h>
+#include <Drivers.h>
+#include <Errors.h>
+
+#include <ACPI.h>
+
+acpi_module_info *acpi;
+
+status_t
+init_hardware (void)
+{
+	return B_OK;
+}
+
+status_t
+init_driver (void)
+{
+	get_module(B_ACPI_MODULE_NAME,(module_info **)&acpi);
+	return B_OK;
+}
+
+void
+uninit_driver (void)
+{
+	put_module(B_ACPI_MODULE_NAME);
+}
+
+	
+/* ----------
+	acpi_button_open - handle open() calls
+----- */
+
+static status_t
+acpi_button_open (const char *name, uint32 flags, void** cookie)
+{
+	return B_OK;
+}
+
+
+/* ----------
+	acpi_button_read - handle read() calls
+----- */
+
+static status_t
+acpi_button_read (void* cookie, off_t position, void *buf, size_t* num_bytes)
+{
+	*num_bytes = 0;				/* tell caller nothing was read */
+	return B_IO_ERROR;
+}
+
+
+/* ----------
+	acpi_button_write - handle write() calls
+----- */
+
+static status_t
+acpi_button_write (void* cookie, off_t position, const void* buffer, size_t* num_bytes)
+{
+	*num_bytes = 0;				/* tell caller nothing was written */
+	return B_IO_ERROR;
+}
+
+
+/* ----------
+	acpi_button_control - handle ioctl calls
+----- */
+
+static status_t
+acpi_button_control (void* cookie, uint32 op, void* arg, size_t len)
+{	
+	switch (op) {
+		case ~ACPI_BITREG_POWER_BUTTON_ENABLE:
+		case ~ACPI_BITREG_SLEEP_BUTTON_ENABLE:
+		case ~ACPI_BITREG_POWER_BUTTON_STATUS:
+		case ~ACPI_BITREG_SLEEP_BUTTON_STATUS:
+			acpi->write_acpi_reg(op,*((uint32 *)(arg)));
+			break;
+		case ACPI_BITREG_POWER_BUTTON_STATUS:
+		case ACPI_BITREG_SLEEP_BUTTON_STATUS:
+			*((uint32 *)(arg)) = acpi->read_acpi_reg(op);
+			break;
+		default:
+			return B_ERROR;
+	}
+	return B_OK;
+}
+
+
+/* ----------
+	acpi_button_close - handle close() calls
+----- */
+
+static status_t
+acpi_button_close (void* cookie)
+{
+	return B_OK;
+}
+
+
+/* -----
+	acpi_button_free - called after the last device is closed, and after
+	all i/o is complete.
+----- */
+static status_t
+acpi_button_free (void* cookie)
+{
+	return B_OK;
+}
+
+
+/* -----
+	null-terminated array of device names supported by this driver
+----- */
+
+static const char *acpi_button_name[] = {
+	"power/acpi_button",
+	NULL
+};
+
+/* -----
+	function pointers for the device hooks entry points
+----- */
+
+device_hooks acpi_button_hooks = {
+	acpi_button_open, 			/* -> open entry point */
+	acpi_button_close, 			/* -> close entry point */
+	acpi_button_free,			/* -> free cookie */
+	acpi_button_control, 		/* -> control entry point */
+	acpi_button_read,			/* -> read entry point */
+	acpi_button_write,			/* -> write entry point */
+	NULL, NULL, NULL, NULL
+};
+
+/* ----------
+	publish_devices - return a null-terminated array of devices
+	supported by this driver.
+----- */
+
+const char**
+publish_devices()
+{
+	return acpi_button_name;
+}
+
+/* ----------
+	find_device - return ptr to device hooks structure for a
+	given device name
+----- */
+
+device_hooks*
+find_device(const char* name)
+{
+	return &acpi_button_hooks;
+}
+