NetBSD/sys/arch/atari/dev/wdc_mb.c

267 lines
7.2 KiB
C

/* $NetBSD: wdc_mb.c,v 1.5 1998/12/03 18:24:30 bouyer 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/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;
{
struct channel_softc ch = { 0 };
int result = 0;
u_char sv_ierb;
if ((machineid & ATARI_TT) || strcmp("wdc", aux) || cfp->cf_unit != 0)
return 0;
if (!atari_realconfig)
return 0;
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);
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 &= ~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
*/
single_inst_bclr_b(MFP->mf_iprb, 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);
}