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/* $OpenBSD: pciidereg.h,v 1.5 2003/09/28 21:01:43 grange Exp $ */
/* $NetBSD: pciidereg.h,v 1.6 2000/11/14 18:42:58 thorpej Exp $ */
/*
* Copyright (c) 1998 Christopher G. Demetriou. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* PCI IDE controller register definitions.
*
* Author: Christopher G. Demetriou, March 2, 1998.
*
* See "PCI IDE Controller Specification, Revision 1.0 3/4/94" and
* "Programming Interface for Bus Master IDE Controller, Revision 1.0
* 5/16/94" from the PCI SIG.
*/
/*
* Number of channels per chip. MUST NOT CHANGE (macros in pciide.c and
* this file depend on its value).
*/
#define PCIIDE_NUM_CHANNELS 2
/*
* PCI base address register locations (some are per-channel).
*/
#define PCIIDE_REG_CMD_BASE(chan) (0x10 + (8 * (chan)))
#define PCIIDE_REG_CTL_BASE(chan) (0x14 + (8 * (chan)))
#define PCIIDE_REG_BUS_MASTER_DMA 0x20
/*
* Bits in the PCI Programming Interface register (some are per-channel).
* Bits 6-4 are defined as read-only in PCI 2.1 specification.
* Microsoft proposed to use these bits for independent channels
* enable/disable. This feature is enabled based on the value of bit 6.
*/
#define PCIIDE_CHANSTATUS_EN 0x40
#define PCIIDE_CHAN_EN(chan) (0x20 >> (chan))
#define PCIIDE_INTERFACE_PCI(chan) (0x01 << (2 * (chan)))
#define PCIIDE_INTERFACE_SETTABLE(chan) (0x02 << (2 * (chan)))
#define PCIIDE_INTERFACE_BUS_MASTER_DMA 0x80
/*
* Compatibility address/IRQ definitions (some are per-channel).
*/
#define PCIIDE_COMPAT_CMD_BASE(chan) ((chan) == 0 ? 0x1f0 : 0x170)
#define PCIIDE_COMPAT_CMD_SIZE 8
#define PCIIDE_COMPAT_CTL_BASE(chan) ((chan) == 0 ? 0x3f6 : 0x376)
#define PCIIDE_COMPAT_CTL_SIZE 1
#define PCIIDE_COMPAT_IRQ(chan) ((chan) == 0 ? 14 : 15)
#define PCIIDE_CHANNEL_NAME(chan) ((chan) == 0 ? "channel 0" : "channel 1")
/*
* definitions for IDE DMA
* XXX maybe this should go elsewhere
*/
/* secondary channel registers offset */
#define IDEDMA_SCH_OFFSET 0x08
/* Bus master command register (per channel) */
#define IDEDMA_CMD(chan) (0x00 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_CMD_WRITE 0x08
#define IDEDMA_CMD_START 0x01
/* Bus master status register (per channel) */
#define IDEDMA_CTL(chan) (0x02 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_CTL_DRV_DMA(d) (0x20 << (d))
#define IDEDMA_CTL_INTR 0x04
#define IDEDMA_CTL_ERR 0x02
#define IDEDMA_CTL_ACT 0x01
/* Bus master table pointer register (per channel) */
#define IDEDMA_TBL(chan) (0x04 + IDEDMA_SCH_OFFSET * (chan))
#define IDEDMA_TBL_MASK 0xfffffffc
#define IDEDMA_TBL_ALIGN 0x00010000
/* bus master table descriptor */
struct idedma_table {
u_int32_t base_addr; /* physical base addr of memory region */
u_int32_t byte_count; /* memory region length */
#define IDEDMA_BYTE_COUNT_MASK 0x0000FFFF
#define IDEDMA_BYTE_COUNT_EOT 0x80000000
};
#define IDEDMA_BYTE_COUNT_MAX 0x00010000 /* Max I/O per table */
#define IDEDMA_BYTE_COUNT_ALIGN 0x00010000
/* Number of idedma table needed */
#define NIDEDMA_TABLES (MAXPHYS/PAGE_SIZE + 1)
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