310 lines
8.5 KiB
C
310 lines
8.5 KiB
C
/* $NetBSD: wdc_mb.c,v 1.27 2006/01/16 20:30:19 bouyer Exp $ */
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/*-
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* Copyright (c) 1998, 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Charles M. Hannum and by Onno van der Linden.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: wdc_mb.c,v 1.27 2006/01/16 20:30:19 bouyer Exp $");
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/malloc.h>
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#include <sys/device.h>
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#include <machine/bswap.h>
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#include <machine/cpu.h>
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#include <machine/bus.h>
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#include <machine/iomap.h>
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#include <machine/mfp.h>
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#include <machine/dma.h>
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#include <dev/ata/atavar.h>
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#include <dev/ic/wdcvar.h>
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#include <m68k/asm_single.h>
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#include <atari/dev/ym2149reg.h>
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#include <atari/atari/device.h>
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/* Falcon IDE register locations (base and offsets). */
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#define FALCON_WD_BASE 0xfff00000
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#define FALCON_WD_LEN 0x40
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static int falcon_wd_reg[WDC_NREG + WDC_NSHADOWREG] = {
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0x00, /* wd_data */
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0x05, /* wd_error */
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0x09, /* wd_seccnt */
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0x0d, /* wd_sector */
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0x11, /* wd_cyl_lo */
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0x15, /* wd_cyl_hi */
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0x19, /* wd_sdh */
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0x1d, /* wd_command */
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0x39, /* wd_status */
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0x01 /* wd_features */
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};
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/*
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* XXX This code currently doesn't even try to allow 32-bit data port use.
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*/
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static int claim_hw __P((struct ata_channel *, int));
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static void free_hw __P((struct ata_channel *));
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static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t, u_int16_t *, bus_size_t));
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static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t,
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bus_size_t, const u_int16_t *, bus_size_t));
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struct wdc_mb_softc {
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struct wdc_softc sc_wdcdev;
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struct ata_channel *sc_chanlist[1];
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struct ata_channel sc_channel;
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struct ata_queue sc_chqueue;
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struct wdc_regs sc_wdc_regs;
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void *sc_ih;
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};
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int wdc_mb_probe __P((struct device *, struct cfdata *, void *));
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void wdc_mb_attach __P((struct device *, struct device *, void *));
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CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc),
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wdc_mb_probe, wdc_mb_attach, NULL, NULL);
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int
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wdc_mb_probe(parent, cfp, aux)
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struct device *parent;
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struct cfdata *cfp;
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void *aux;
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{
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static int wdc_matched = 0;
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struct ata_channel ch;
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struct wdc_softc wdc;
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struct wdc_regs wdr;
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int result = 0, i;
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u_char sv_ierb;
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if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched)
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return 0;
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if (!atari_realconfig)
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return 0;
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memset(&wdc, 0, sizeof(wdc));
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memset(&ch, 0, sizeof(ch));
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ch.ch_atac = &wdc.sc_atac;
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wdc.regs = &wdr;
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wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag();
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if (wdr.cmd_iot == NULL)
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return 0;
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wdr.cmd_iot->stride = 2;
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wdr.cmd_iot->wo_1 = 1;
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if (bus_space_map(wdr.cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0,
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&wdr.cmd_baseioh))
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return 0;
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for (i = 0; i < (WDC_NREG + WDC_NSHADOWREG); i++)
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if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh,
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falcon_wd_reg[i], i == 0 ? 2 : 1, &wdr.cmd_iohs[i]) != 0) {
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bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh,
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FALCON_WD_LEN);
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return 0;
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}
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/*
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* Make sure IDE interrupts are disabled during probing.
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*/
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sv_ierb = MFP->mf_ierb;
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MFP->mf_ierb &= ~IB_DINT;
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/*
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* Make sure that IDE is turned on on the Falcon.
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*/
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if (machineid & ATARI_FALCON)
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ym2149_ser2(0);
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result = wdcprobe(&ch);
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MFP->mf_ierb = sv_ierb;
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bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_LEN);
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mb_free_bus_space_tag(wdr.cmd_iot);
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if (result)
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wdc_matched = 1;
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return (result);
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}
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void
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wdc_mb_attach(parent, self, aux)
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struct device *parent, *self;
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void *aux;
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{
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struct wdc_mb_softc *sc = (void *)self;
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struct wdc_regs *wdr;
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int i;
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printf("\n");
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sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
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wdr->cmd_iot = wdr->ctl_iot =
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mb_alloc_bus_space_tag();
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wdr->cmd_iot->stride = 2;
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wdr->cmd_iot->wo_1 = 1;
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wdr->cmd_iot->abs_rms_2 = read_multi_2_swap;
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wdr->cmd_iot->abs_wms_2 = write_multi_2_swap;
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if (bus_space_map(wdr->cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0,
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&wdr->cmd_baseioh)) {
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printf("%s: couldn't map registers\n",
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sc->sc_wdcdev.sc_atac.atac_dev.dv_xname);
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return;
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}
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for (i = 0; i < (WDC_NREG + WDC_NSHADOWREG); i++)
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if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
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falcon_wd_reg[i], i == 0 ? 2 : 1, &wdr->cmd_iohs[i]) != 0) {
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printf("%s: couldn't subregion cmd reg %i\n",
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sc->sc_wdcdev.sc_atac.atac_dev.dv_xname, i);
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bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh,
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FALCON_WD_LEN);
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return;
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}
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/*
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* Play a nasty trick here. Normally we only manipulate the
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* interrupt *mask*. However to defeat wd_get_parms(), we
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* disable the interrupts here using the *enable* register.
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*/
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MFP->mf_ierb &= ~IB_DINT;
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sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 |
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ATAC_CAP_ATA_NOSTREAM;
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sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
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sc->sc_wdcdev.sc_atac.atac_claim_hw = &claim_hw;
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sc->sc_wdcdev.sc_atac.atac_free_hw = &free_hw;
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sc->sc_chanlist[0] = &sc->sc_channel;
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sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
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sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
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sc->sc_channel.ch_channel = 0;
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sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
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sc->sc_channel.ch_queue = &sc->sc_chqueue;
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sc->sc_channel.ch_ndrive = 2;
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/*
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* Setup & enable disk related interrupts.
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*/
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MFP->mf_ierb |= IB_DINT;
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MFP->mf_iprb = (u_int8_t)~IB_DINT;
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MFP->mf_imrb |= IB_DINT;
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wdcattach(&sc->sc_channel);
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}
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/*
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* Hardware locking
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*/
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static int wd_lock;
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static int
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claim_hw(chp, maysleep)
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struct ata_channel *chp;
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int maysleep;
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{
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if (wd_lock != DMA_LOCK_GRANT) {
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if (wd_lock == DMA_LOCK_REQ) {
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/*
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* ST_DMA access is being claimed.
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*/
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return 0;
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}
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if (!st_dmagrab((dma_farg)wdcintr,
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(dma_farg)(maysleep ? NULL : wdcrestart), chp,
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&wd_lock, 1))
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return 0;
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}
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return 1;
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}
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static void
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free_hw(chp)
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struct ata_channel *chp;
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{
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/*
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* Flush pending interrupts before giving-up lock
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*/
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MFP->mf_iprb = (u_int8_t)~IB_DINT;
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/*
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* Only free the lock on a Falcon. On the Hades, keep it.
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*/
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/* if (machineid & ATARI_FALCON) */
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st_dmafree(chp, &wd_lock);
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}
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/*
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* XXX
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* This piece of uglyness is caused by the fact that the byte lanes of
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* the data-register are swapped on the atari. This works OK for an IDE
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* disk, but turns into a nightmare when used on atapi devices.
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*/
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#define calc_addr(base, off, stride, wm) \
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((u_long)(base) + ((off) << (stride)) + (wm))
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static void
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read_multi_2_swap(t, h, o, a, c)
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bus_space_tag_t t;
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bus_space_handle_t h;
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bus_size_t o, c;
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u_int16_t *a;
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{
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u_int16_t *ba;
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ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2);
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for (; c; a++, c--)
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*a = bswap16(*ba);
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}
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static void
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write_multi_2_swap(t, h, o, a, c)
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bus_space_tag_t t;
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bus_space_handle_t h;
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bus_size_t o, c;
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const u_int16_t *a;
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{
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u_int16_t *ba;
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ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2);
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for (; c; a++, c--)
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*ba = bswap16(*a);
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}
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