273 lines
7.3 KiB
C
273 lines
7.3 KiB
C
/* $NetBSD: wdc_mb.c,v 1.9 2000/03/29 14:19:23 leo Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Charles M. Hannum and by Onno van der Linden.
|
|
*
|
|
* 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 the NetBSD
|
|
* Foundation, Inc. and its contributors.
|
|
* 4. Neither the name of The NetBSD Foundation nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
* ``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 FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/bswap.h>
|
|
#include <machine/cpu.h>
|
|
#include <machine/bus.h>
|
|
#include <machine/iomap.h>
|
|
#include <machine/mfp.h>
|
|
#include <machine/dma.h>
|
|
|
|
#include <dev/ata/atavar.h>
|
|
#include <dev/ic/wdcvar.h>
|
|
|
|
#include <m68k/asm_single.h>
|
|
|
|
#include <atari/dev/ym2149reg.h>
|
|
#include <atari/atari/device.h>
|
|
|
|
/*
|
|
* XXX This code currently doesn't even try to allow 32-bit data port use.
|
|
*/
|
|
static int claim_hw __P((void *, int));
|
|
static void free_hw __P((void *));
|
|
static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t,
|
|
bus_size_t, u_int16_t *, bus_size_t));
|
|
static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t,
|
|
bus_size_t, const u_int16_t *, bus_size_t));
|
|
|
|
struct wdc_mb_softc {
|
|
struct wdc_softc sc_wdcdev;
|
|
struct channel_softc *wdc_chanptr;
|
|
struct channel_softc wdc_channel;
|
|
void *sc_ih;
|
|
};
|
|
|
|
int wdc_mb_probe __P((struct device *, struct cfdata *, void *));
|
|
void wdc_mb_attach __P((struct device *, struct device *, void *));
|
|
|
|
struct cfattach wdc_mb_ca = {
|
|
sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach
|
|
};
|
|
|
|
int
|
|
wdc_mb_probe(parent, cfp, aux)
|
|
struct device *parent;
|
|
struct cfdata *cfp;
|
|
void *aux;
|
|
{
|
|
static int wdc_matched = 0;
|
|
struct channel_softc ch;
|
|
int result = 0;
|
|
u_char sv_ierb;
|
|
|
|
if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched)
|
|
return 0;
|
|
if (!atari_realconfig)
|
|
return 0;
|
|
|
|
memset(&ch, 0, sizeof(ch));
|
|
|
|
ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag();
|
|
if (ch.cmd_iot == NULL)
|
|
return 0;
|
|
ch.cmd_iot->stride = 2;
|
|
ch.cmd_iot->wo_1 = 1;
|
|
|
|
if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh))
|
|
return 0;
|
|
if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh))
|
|
return 0;
|
|
|
|
/*
|
|
* Make sure IDE interrupts are disabled during probing.
|
|
*/
|
|
sv_ierb = MFP->mf_ierb;
|
|
MFP->mf_ierb &= ~IB_DINT;
|
|
|
|
/*
|
|
* Make sure that IDE is turned on on the Falcon.
|
|
*/
|
|
if (machineid & ATARI_FALCON)
|
|
ym2149_ser2(0);
|
|
|
|
result = wdcprobe(&ch);
|
|
|
|
MFP->mf_ierb = sv_ierb;
|
|
|
|
bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40);
|
|
mb_free_bus_space_tag(ch.cmd_iot);
|
|
|
|
if (result)
|
|
wdc_matched = 1;
|
|
return (result);
|
|
}
|
|
|
|
void
|
|
wdc_mb_attach(parent, self, aux)
|
|
struct device *parent, *self;
|
|
void *aux;
|
|
{
|
|
struct wdc_mb_softc *sc = (void *)self;
|
|
|
|
printf("\n");
|
|
|
|
sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot =
|
|
mb_alloc_bus_space_tag();
|
|
sc->wdc_channel.cmd_iot->stride = 2;
|
|
sc->wdc_channel.cmd_iot->wo_1 = 1;
|
|
sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap;
|
|
sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap;
|
|
if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0,
|
|
&sc->wdc_channel.cmd_ioh)) {
|
|
printf("%s: couldn't map registers\n",
|
|
sc->sc_wdcdev.sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
if (bus_space_subregion(sc->wdc_channel.cmd_iot,
|
|
sc->wdc_channel.cmd_ioh, 0x38, 1, &sc->wdc_channel.ctl_ioh))
|
|
return;
|
|
|
|
/*
|
|
* Play a nasty trick here. Normally we only manipulate the
|
|
* interrupt *mask*. However to defeat wd_get_parms(), we
|
|
* disable the interrupts here using the *enable* register.
|
|
*/
|
|
MFP->mf_ierb &= ~IB_DINT;
|
|
|
|
sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_HWLOCK |
|
|
WDC_CAPABILITY_ATA_NOSTREAM;
|
|
sc->sc_wdcdev.PIO_cap = 0;
|
|
sc->sc_wdcdev.claim_hw = &claim_hw;
|
|
sc->sc_wdcdev.free_hw = &free_hw;
|
|
sc->wdc_chanptr = &sc->wdc_channel;
|
|
sc->sc_wdcdev.channels = &sc->wdc_chanptr;
|
|
sc->sc_wdcdev.nchannels = 1;
|
|
sc->wdc_channel.channel = 0;
|
|
sc->wdc_channel.wdc = &sc->sc_wdcdev;
|
|
sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue),
|
|
M_DEVBUF, M_NOWAIT);
|
|
if (sc->wdc_channel.ch_queue == NULL) {
|
|
printf("%s: can't allocate memory for command queue",
|
|
sc->sc_wdcdev.sc_dev.dv_xname);
|
|
return;
|
|
}
|
|
wdcattach(&sc->wdc_channel);
|
|
|
|
/*
|
|
* Setup & enable disk related interrupts.
|
|
*/
|
|
MFP->mf_ierb |= IB_DINT;
|
|
MFP->mf_iprb = (u_int8_t)~IB_DINT;
|
|
MFP->mf_imrb |= IB_DINT;
|
|
}
|
|
|
|
/*
|
|
* Hardware locking
|
|
*/
|
|
static int wd_lock;
|
|
|
|
static int
|
|
claim_hw(softc, maysleep)
|
|
void *softc;
|
|
int maysleep;
|
|
{
|
|
if (wd_lock != DMA_LOCK_GRANT) {
|
|
if (wd_lock == DMA_LOCK_REQ) {
|
|
/*
|
|
* ST_DMA access is being claimed.
|
|
*/
|
|
return 0;
|
|
}
|
|
if (!st_dmagrab((dma_farg)wdcintr,
|
|
(dma_farg)(maysleep ? NULL : wdcrestart), softc,
|
|
&wd_lock, 1))
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
free_hw(softc)
|
|
void *softc;
|
|
{
|
|
/*
|
|
* Flush pending interrupts before giving-up lock
|
|
*/
|
|
MFP->mf_iprb = (u_int8_t)~IB_DINT;
|
|
|
|
/*
|
|
* Only free the lock on a Falcon. On the Hades, keep it.
|
|
*/
|
|
/* if (machineid & ATARI_FALCON) */
|
|
st_dmafree(softc, &wd_lock);
|
|
}
|
|
|
|
/*
|
|
* XXX
|
|
* This piece of uglyness is caused by the fact that the byte lanes of
|
|
* the data-register are swapped on the atari. This works OK for an IDE
|
|
* disk, but turns into a nightmare when used on atapi devices.
|
|
*/
|
|
#define calc_addr(base, off, stride, wm) \
|
|
((u_long)(base) + ((off) << (stride)) + (wm))
|
|
|
|
static void
|
|
read_multi_2_swap(t, h, o, a, c)
|
|
bus_space_tag_t t;
|
|
bus_space_handle_t h;
|
|
bus_size_t o, c;
|
|
u_int16_t *a;
|
|
{
|
|
u_int16_t *ba;
|
|
|
|
ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2);
|
|
for (; c; a++, c--)
|
|
*a = bswap16(*ba);
|
|
}
|
|
|
|
static void
|
|
write_multi_2_swap(t, h, o, a, c)
|
|
bus_space_tag_t t;
|
|
bus_space_handle_t h;
|
|
bus_size_t o, c;
|
|
const u_int16_t *a;
|
|
{
|
|
u_int16_t *ba;
|
|
|
|
ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2);
|
|
for (; c; a++, c--)
|
|
*ba = bswap16(*a);
|
|
}
|