/*      $NetBSD: wdc_mb.c,v 1.43 2023/12/20 00:40:42 thorpej Exp $      */

/*-
* Copyright (c) 1998, 2003 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.
*
* 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/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc_mb.c,v 1.43 2023/12/20 00:40:42 thorpej Exp $");

#include <sys/types.h>
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>

#include <sys/bswap.h>
#include <machine/cpu.h>
#include <sys/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>

/* Falcon IDE register locations (base and offsets). */
#define FALCON_WD_BASE  0xfff00000
#define FALCON_WD_LEN   0x40
#define FALCON_WD_AUX   0x38

/*
* XXX This code currently doesn't even try to allow 32-bit data port use.
*/
static int      claim_hw(struct ata_channel *, int);
static void     free_hw(struct ata_channel *);
static void     read_multi_2_swap(bus_space_tag_t, bus_space_handle_t,
                   bus_size_t, uint16_t *, bus_size_t);
static void     write_multi_2_swap(bus_space_tag_t, bus_space_handle_t,
                   bus_size_t, const uint16_t *, bus_size_t);

struct wdc_mb_softc {
       struct wdc_softc sc_wdcdev;
       struct ata_channel *sc_chanlist[1];
       struct ata_channel sc_channel;
       struct wdc_regs sc_wdc_regs;
       void *sc_ih;
};

static int      wdc_mb_probe(device_t, struct cfdata *, void *);
static void     wdc_mb_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(wdc_mb, sizeof(struct wdc_mb_softc),
   wdc_mb_probe, wdc_mb_attach, NULL, NULL);

static int
wdc_mb_probe(device_t parent, cfdata_t cfp, void *aux)
{
       static int wdc_matched = 0;
       struct wdc_regs wdr;
       int result = 0, i;
       uint8_t sv_ierb;

       if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched)
               return 0;
       if (!atari_realconfig)
               return 0;

       wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag();
       if (wdr.cmd_iot == NULL)
               return 0;
       wdr.cmd_iot->stride = 0;
       wdr.cmd_iot->wo_1   = 1;

       if (bus_space_map(wdr.cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0,
           &wdr.cmd_baseioh))
               goto out;
       for (i = 0; i < WDC_NREG; i++) {
               if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh,
                   i * 4, 4, &wdr.cmd_iohs[i]) != 0)
                       goto outunmap;
       }
       wdc_init_shadow_regs(&wdr);

       if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_AUX, 4,
           &wdr.ctl_ioh))
               goto outunmap;

       /*
        * 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(&wdr);

       MFP->mf_ierb = sv_ierb;

outunmap:
       bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_LEN);
out:
       mb_free_bus_space_tag(wdr.cmd_iot);

       if (result)
               wdc_matched = 1;
       return result;
}

static void
wdc_mb_attach(device_t parent, device_t self, void *aux)
{
       struct wdc_mb_softc *sc = device_private(self);
       struct wdc_regs *wdr;
       int i;

       aprint_normal("\n");

       sc->sc_wdcdev.sc_atac.atac_dev = self;
       sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
       wdr->cmd_iot = wdr->ctl_iot =
           mb_alloc_bus_space_tag();
       wdr->cmd_iot->stride = 0;
       wdr->cmd_iot->wo_1   = 1;
       wdr->cmd_iot->abs_rms_2 = read_multi_2_swap;
       wdr->cmd_iot->abs_wms_2 = write_multi_2_swap;
       if (bus_space_map(wdr->cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0,
                         &wdr->cmd_baseioh)) {
               aprint_error_dev(self, "couldn't map registers\n");
               return;
       }
       for (i = 0; i < WDC_NREG; i++) {
               if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                   i * 4, 4, &wdr->cmd_iohs[i]) != 0) {
                       aprint_error_dev(self,
                           "couldn't subregion cmd reg %i\n", i);
                       bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh,
                           FALCON_WD_LEN);
                       return;
               }
       }

       if (bus_space_subregion(wdr->cmd_iot,
           wdr->cmd_baseioh, FALCON_WD_AUX, 4, &wdr->ctl_ioh)) {
               bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, FALCON_WD_LEN);
               aprint_error_dev(self, "couldn't subregion aux reg\n");
               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.sc_atac.atac_cap |= ATAC_CAP_DATA16 |
           ATAC_CAP_ATA_NOSTREAM;
       sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
       sc->sc_wdcdev.sc_atac.atac_claim_hw = &claim_hw;
       sc->sc_wdcdev.sc_atac.atac_free_hw  = &free_hw;
       sc->sc_chanlist[0] = &sc->sc_channel;
       sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
       sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
       sc->sc_wdcdev.wdc_maxdrives = 2;
       sc->sc_channel.ch_channel = 0;
       sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac;

       wdc_init_shadow_regs(wdr);

       /*
        * Setup & enable disk related interrupts.
        */
       MFP->mf_ierb |= IB_DINT;
       MFP->mf_iprb  = (uint8_t)~IB_DINT;
       MFP->mf_imrb |= IB_DINT;

       wdcattach(&sc->sc_channel);
}

/*
* Hardware locking
*/
static int      wd_lock;

static int
claim_hw(struct ata_channel *chp, int maysleep)
{
       ata_channel_lock_owned(chp);

       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), chp,
                   &wd_lock, 1, &chp->ch_lock))
                       return 0;
       }
       return 1;
}

static void
free_hw(struct ata_channel *chp)
{
       ata_channel_lock_owned(chp);

       /*
        * Flush pending interrupts before giving-up lock
        */
       MFP->mf_iprb = (uint8_t)~IB_DINT;

       /*
        * Only free the lock on a Falcon. On the Hades, keep it.
        */
/*      if (machineid & ATARI_FALCON) */
               st_dmafree(chp, &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(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
   uint16_t *a, bus_size_t c)
{
       volatile uint16_t *ba;

       ba = (volatile uint16_t *)calc_addr(h, o, t->stride, t->wo_2);
       for (; c; a++, c--)
               *a = bswap16(*ba);
}

static void
write_multi_2_swap(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o,
   const uint16_t *a, bus_size_t c)
{
       volatile uint16_t *ba;

       ba = (volatile uint16_t *)calc_addr(h, o, t->stride, t->wo_2);
       for (; c; a++, c--)
               *ba = bswap16(*a);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.