1 /* 2 * Copyright 2002-2003, Thomas Kurschel. All rights reserved. 3 * Distributed under the terms of the MIT License. 4 */ 5 #ifndef _ISA2_H 6 #define _ISA2_H 7 8 9 /*! ISA bus manager 10 11 This is an improper name - this bus manager uses the PnP manager to 12 load device drivers, but calling it ISA PnP manager would be wrong as 13 ISA PnP information isn't used at all. 14 15 All ISA drivers must be Universal driver (see pnp_manager.h), as they 16 are all direct children of the ISA bus node. Having an ISA PnP bus manager 17 (which we don't), one node would be created per ISA device and thus you 18 could write Specific drivers, but under normal ISA we don't even know 19 how many devices are there, therefore the Universal driver trick. 20 21 Apart from the loading, the main change is the resource manager. In 22 a driver, you must allocate the resources before registering the node and 23 deallocate it when your node is removed and if the driver isn't loaded at 24 this time. If it is, you must delay deallocation until the driver gets 25 unloaded to make sure no new driver touches the same resources like you 26 meanwhile. 27 */ 28 29 30 #include <device_manager.h> 31 #include <ISA.h> 32 33 34 // maximum size of one dma transfer 35 // (in bytes for 8 bit transfer, in words for 16 bit transfer) 36 #define B_MAX_ISA_DMA_COUNT 0x10000 37 38 typedef struct isa2_module_info { 39 driver_module_info info; 40 41 uint8 (*read_io_8)(int mapped_io_addr); 42 void (*write_io_8)(int mapped_io_addr, uint8 value); 43 uint16 (*read_io_16)(int mapped_io_addr); 44 void (*write_io_16)(int mapped_io_addr, uint16 value); 45 uint32 (*read_io_32)(int mapped_io_addr); 46 void (*write_io_32)(int mapped_io_addr, uint32 value); 47 48 // don't know what it's for, remains for compatibility 49 void *(*ram_address)(const void *physical_address_in_system_memory); 50 51 // start dma transfer (scattered DMA is not supported as it's EISA specific) 52 status_t (*start_isa_dma)( 53 long channel, // dma channel to use 54 void *buf, // buffer to transfer 55 long transfer_count, // # transfers 56 uchar mode, // mode flags 57 uchar e_mode // extended mode flags 58 ); 59 } isa2_module_info; 60 61 // type of isa device 62 #define ISA_DEVICE_TYPE_NAME "isa/device/v1" 63 // directory of ISA drivers 64 // (there is only one device node, so put all drivers under "universal") 65 #define ISA_DRIVERS_DIR "isa" 66 67 68 #endif /* _ISA2_H */ 69