The /dev/misc/config driver which provides userland access to the

Configuration Manager, once this is implemented.
Needed for the "listdev" command and the Devices preferences application.
Not tested!


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2339 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/drivers/Jamfile

@@ -3,6 +3,7 @@ SubDir OBOS_TOP src add-ons kernel drivers ;
 SubInclude OBOS_TOP src add-ons kernel drivers arch ;
 SubInclude OBOS_TOP src add-ons kernel drivers audio ;
 SubInclude OBOS_TOP src add-ons kernel drivers common ;
+SubInclude OBOS_TOP src add-ons kernel drivers misc ;
 SubInclude OBOS_TOP src add-ons kernel drivers random ;
 SubInclude OBOS_TOP src add-ons kernel drivers net ;
 

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

@@ -0,0 +1,3 @@
+SubDir OBOS_TOP src add-ons kernel drivers misc ;
+
+KernelObjects config.c : -fno-pic ;

src/add-ons/kernel/drivers/misc/config.c

@@ -0,0 +1,166 @@
+/* config driver
+** provides userland access to the device configuration manager
+**
+** Copyright 2002, Axel Doerfler. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+
+//#include <Errors.h>
+#include <Drivers.h>
+#include <drivers/config_manager.h>
+#include <string.h>
+
+#include "config_driver.h"
+
+
+#define DEVICE_NAME "misc/config"
+struct config_manager_for_driver_module_info *gConfigManager;
+
+
+//	Device interface
+
+
+static status_t
+config_open(const char *name, uint32 flags, void **_cookie)
+{
+	*_cookie = NULL;
+	return B_OK;
+}
+
+
+static status_t
+config_close(void *cookie)
+{
+	return B_OK;
+}
+
+
+static status_t
+config_free_cookie(void *cookie)
+{
+	return B_OK;
+}
+
+
+static status_t
+config_ioctl(void *cookie, uint32 op, void *buffer, size_t len)
+{
+	struct cm_ioctl_data *params = (struct cm_ioctl_data *)buffer;
+
+	// simple check for validity of the argument
+	if (params == NULL || params->magic != op)
+		return B_BAD_VALUE;
+
+	switch (op) {
+		case CM_GET_NEXT_DEVICE_INFO:
+			gConfigManager->get_next_device_info(params->bus, &params->cookie,
+				(struct device_info *)params->data, params->data_len);
+			break;
+		case CM_GET_DEVICE_INFO_FOR:
+			gConfigManager->get_device_info_for(params->cookie,
+				(struct device_info *)params->data, params->data_len);
+			break;
+		case CM_GET_SIZE_OF_CURRENT_CONFIGURATION_FOR:
+			gConfigManager->get_size_of_current_configuration_for(params->cookie);
+			break;
+		case CM_GET_CURRENT_CONFIGURATION_FOR:
+			gConfigManager->get_current_configuration_for(params->cookie,
+				(struct device_configuration *)params->data, params->data_len);
+			break;
+		case CM_GET_SIZE_OF_POSSIBLE_CONFIGURATIONS_FOR:
+			gConfigManager->get_size_of_possible_configurations_for(params->cookie);
+			break;
+		case CM_GET_POSSIBLE_CONFIGURATIONS_FOR:
+			gConfigManager->get_possible_configurations_for(params->cookie,
+				(struct possible_device_configurations *)params->data, params->data_len);
+			break;
+		case CM_COUNT_RESOURCE_DESCRIPTORS_OF_TYPE:
+			gConfigManager->count_resource_descriptors_of_type(params->config, params->type);
+			break;
+		case CM_GET_NTH_RESOURCE_DESCRIPTOR_OF_TYPE:
+			gConfigManager->get_nth_resource_descriptor_of_type(params->config, params->n,
+				params->type, (resource_descriptor *)params->data, params->data_len);
+			break;
+	}
+	return B_NOT_ALLOWED;
+}
+
+
+static ssize_t
+config_read(void * cookie, off_t pos, void *buf, size_t *len)
+{
+	return 0;
+}
+
+
+static ssize_t
+config_write(void * cookie, off_t pos, const void *buf, size_t *len)
+{
+	return 0;
+}
+
+
+//	#pragma mark -
+//	Driver interface
+
+
+status_t
+init_hardware()
+{
+	return B_OK;
+}
+
+
+const char **
+publish_devices(void)
+{
+	static const char *devices[] = {
+		DEVICE_NAME, 
+		NULL
+	};
+
+	return devices;
+}
+
+
+device_hooks *
+find_device(const char *name)
+{
+	static device_hooks hooks = {
+		&config_open,
+		&config_close,
+		&config_free_cookie,
+		&config_ioctl,
+		&config_read,
+		&config_write,
+		/* Leave select/deselect/readv/writev undefined. The kernel will
+		 * use its own default implementation. The basic hooks above this
+		 * line MUST be defined, however. */
+		NULL,
+		NULL,
+		NULL,
+		NULL
+	};
+
+	if (!strcmp(name, DEVICE_NAME))
+		return &hooks;
+
+	return NULL;
+}
+
+
+status_t
+init_driver()
+{
+	return get_module(B_CONFIG_MANAGER_FOR_DRIVER_MODULE_NAME, (module_info **)&gConfigManager);
+}
+
+
+void
+uninit_driver()
+{
+	if (gConfigManager != NULL)
+		put_module(B_CONFIG_MANAGER_FOR_DRIVER_MODULE_NAME);
+}
+

src/add-ons/kernel/drivers/misc/config_driver.h

@@ -0,0 +1,38 @@
+#ifndef _CONFIG_MANAGER_DRIVER_H_
+#define _CONFIG_MANAGER_DRIVER_H_
+/* 
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+/* definitions for the /dev/misc/config driver which provides access
+ * to the config_manager via calls to ioctl().
+ *
+ * ToDo: This file should probably located in a publicly accessable place?!
+ */
+
+/* the magic is the ioctl */
+
+#define CM_GET_NEXT_DEVICE_INFO 					'GNDI'
+#define CM_GET_DEVICE_INFO_FOR						'GDIF'
+#define CM_GET_SIZE_OF_CURRENT_CONFIGURATION_FOR	'GSCC'
+#define CM_GET_CURRENT_CONFIGURATION_FOR			'GCCF'
+#define CM_GET_SIZE_OF_POSSIBLE_CONFIGURATIONS_FOR	'GSPC'
+#define CM_GET_POSSIBLE_CONFIGURATIONS_FOR			'GPCF'
+
+#define CM_COUNT_RESOURCE_DESCRIPTORS_OF_TYPE		'CRDT'
+#define CM_GET_NTH_RESOURCE_DESCRIPTOR_OF_TYPE		'GNRD'
+
+struct cm_ioctl_data {
+	uint32				magic;
+	bus_type			bus;
+	uint64				cookie;
+	void				*config;
+	uint32				n;
+	uint32				type;
+	void				*data;
+	uint32				data_len;
+};
+
+#define CM_DEVICE_NAME "misc/config"
+
+#endif	/* _CONFIG_MANAGER_DRIVER_H_ */