/*      $NetBSD: pciidereg.h,v 1.11 2006/11/24 22:04:25 wiz 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 ? "primary" : "secondary")

/*
* definitions for IDE DMA
* XXX maybe this should go elsewhere
*/

/* secondary channel registers offset */
#define IDEDMA_SCH_OFFSET 0x08
#define IDEDMA_NREGS 8

/* Bus master command register */
#define IDEDMA_CMD 0x00
#define IDEDMA_CMD_WRITE 0x08
#define IDEDMA_CMD_START 0x01

/* Bus master status register */
#define IDEDMA_CTL 0x02
#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 */
#define IDEDMA_TBL 0x04
#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