f46308c92a
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36206 a95241bf-73f2-0310-859d-f6bbb57e9c96
69 lines
2.3 KiB
C
69 lines
2.3 KiB
C
/*
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* Copyright 2002-2003, Thomas Kurschel. All rights reserved.
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _ISA2_H
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#define _ISA2_H
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/*! ISA bus manager
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This is an improper name - this bus manager uses the PnP manager to
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load device drivers, but calling it ISA PnP manager would be wrong as
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ISA PnP information isn't used at all.
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All ISA drivers must be Universal driver (see pnp_manager.h), as they
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are all direct children of the ISA bus node. Having an ISA PnP bus manager
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(which we don't), one node would be created per ISA device and thus you
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could write Specific drivers, but under normal ISA we don't even know
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how many devices are there, therefore the Universal driver trick.
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Apart from the loading, the main change is the resource manager. In
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a driver, you must allocate the resources before registering the node and
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deallocate it when your node is removed and if the driver isn't loaded at
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this time. If it is, you must delay deallocation until the driver gets
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unloaded to make sure no new driver touches the same resources like you
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meanwhile.
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*/
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#include <device_manager.h>
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#include <ISA.h>
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// maximum size of one dma transfer
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// (in bytes for 8 bit transfer, in words for 16 bit transfer)
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#define B_MAX_ISA_DMA_COUNT 0x10000
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typedef struct isa2_module_info {
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driver_module_info info;
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uint8 (*read_io_8)(int mapped_io_addr);
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void (*write_io_8)(int mapped_io_addr, uint8 value);
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uint16 (*read_io_16)(int mapped_io_addr);
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void (*write_io_16)(int mapped_io_addr, uint16 value);
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uint32 (*read_io_32)(int mapped_io_addr);
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void (*write_io_32)(int mapped_io_addr, uint32 value);
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// don't know what it's for, remains for compatibility
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void *(*ram_address)(const void *physical_address_in_system_memory);
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// start dma transfer (scattered DMA is not supported as it's EISA specific)
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status_t (*start_isa_dma)(
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long channel, // dma channel to use
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void *buf, // buffer to transfer
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long transfer_count, // # transfers
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uchar mode, // mode flags
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uchar e_mode // extended mode flags
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);
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} isa2_module_info;
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// type of isa device
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#define ISA_DEVICE_TYPE_NAME "isa/device/v1"
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// directory of ISA drivers
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// (there is only one device node, so put all drivers under "universal")
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#define ISA_DRIVERS_DIR "isa"
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#endif /* _ISA2_H */
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