More headers for the new modules and PnP/device system - note, this

is a work in progress; the name as well as the contents will change :-) git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7769 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-06-06 23:52:08 +00:00
parent cc5bfcb2e9
commit 0d59a3d2a9
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+/*
+** Copyright 2002/03, Thomas Kurschel. All rights reserved.
+** Distributed under the terms of the OpenBeOS License.
+*/
+
+/*
+	ISA bus manager
+
+	This is an improper name - this bus manager uses the PnP manager to
+	load device drivers, but calling it ISA PnP manager would be wrong as
+	ISA PnP information isn't used at all.
+	
+	All ISA drivers must be Universal driver (see pnp_manager.h), as they
+	are all direct children of the ISA bus node. Having an ISA PnP bus manager
+	(which we don't), one node would be created per ISA device and thus you 
+	could write Specific drivers, but under normal ISA we don't even know 
+	how many devices are there, therefore the Universal driver trick.
+	
+	Apart from the loading, the main change is the resource manager. In
+	a driver, you must allocate the resources before registering the node and
+	deallocate it when your node is removed and if the driver isn't loaded at
+	this time. If it is, you must delay deallocation until the driver gets
+	unloaded to make sure no new driver touches the same resources like you 
+	meanwhile.
+*/
+
+#ifndef _ISA2_H
+#define _ISA2_H
+
+#include <device_manager.h>
+
+
+enum {
+	B_8_BIT_TRANSFER,
+	B_16_BIT_TRANSFER
+};
+
+// maximum size of one dma transfer 
+// (in bytes for 8 bit transfer, in words for 16 bit transfer)
+#define B_MAX_ISA_DMA_COUNT	0x10000
+
+typedef struct isa2_module_info {
+	pnp_bus_info binfo;
+	
+	uint8 (*read_io_8)( int mapped_io_addr );
+	void (*write_io_8)( int mapped_io_addr, uint8 value );
+	uint16 (*read_io_16)( int mapped_io_addr );
+	void (*write_io_16)( int mapped_io_addr, uint16 value );
+	uint32 (*read_io_32)( int mapped_io_addr );
+	void (*write_io_32)( int mapped_io_addr, uint32 value );
+	
+	// don't know what it's for, remains for compatibility
+	void *(*ram_address)( const void *physical_address_in_system_memory );
+
+	// start dma transfer (scattered DMA is not supported as it's EISA specific)
+	status_t (*start_isa_dma)(
+		long	channel,				// dma channel to use
+		void	*buf,					// buffer to transfer
+		long	transfer_count,			// # transfers
+		uchar	mode,					// mode flags
+		uchar	e_mode					// extended mode flags
+	);
+} isa2_module_info;
+
+// type of isa device
+#define ISA_DEVICE_TYPE_NAME "isa/device/v1"
+// directory of ISA drivers
+// (there is only one device node, so put all drivers under "universal")
+#define ISA_DRIVERS_DIR "isa"
+
+
+#endif