/*      $NetBSD: wdc_extio.c,v 1.13 2022/09/29 07:00:46 skrll Exp $ */

/*-
* Copyright (c) 2007 David Young.  All rights reserved.
*
* CompactFlash attachment for RouterBoard 153.  Derived from
* the NetBSD/mac68k OBIO-IDE attachment.
*
* 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 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.
*/
/*
* Copyright (c) 2002 Takeshi Shibagaki  All rights reserved.
*
* mac68k OBIO-IDE attachment created by Takeshi Shibagaki
*
* 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 Charles M. Hannum.
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wdc_extio.c,v 1.13 2022/09/29 07:00:46 skrll Exp $");

#include <sys/param.h>
#include <sys/bus.h>
#include <sys/callout.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/intr.h>
#include <sys/kernel.h>
#include <sys/systm.h>

#include <mips/adm5120/include/adm5120_extiovar.h>

#include <dev/ata/atareg.h>
#include <dev/ata/atavar.h>
#include <dev/ic/wdcvar.h>

#ifdef WDC_EXTIO_DEBUG
int wdc_extio_debug = 1;
#define WDC_EXTIO_DPRINTF(__fmt, ...)           \
do {                                            \
       if (wdc_extio_debug)                    \
               printf((__fmt), __VA_ARGS__);   \
} while (/*CONSTCOND*/0)
#else /* !WDC_EXTIO_DEBUG */
#define WDC_EXTIO_DPRINTF(__fmt, ...)   do { } while (/*CONSTCOND*/0)
#endif /* WDC_EXTIO_DEBUG */

#define WDC_OBIO_CF_WINSIZE     0x1000
#define WDC_OBIO_REG_OFFSET     0x0800
#define WDC_OBIO_DATA_OFFSET    0x0808
#define WDC_OBIO_AUXREG_OFFSET  0x080e

struct wdc_extio_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_gpio;
       int                     sc_map;
       struct gpio_pinmap      sc_pinmap;
};

int     wdc_extio_match(device_t, cfdata_t, void *);
void    wdc_extio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(wdc_extio, sizeof(struct wdc_extio_softc),
   wdc_extio_match, wdc_extio_attach, NULL, NULL);

#if 0
void    wdc_extio_reset(struct ata_channel *, int);
void
wdc_extio_reset(struct ata_channel *chp, int poll)
{
       struct wdc_softc *wdc = CHAN_TO_WDC(chp);
       struct wdc_regs *wdr = &wdc->regs[chp->ch_channel];
       uint8_t st0;
       int i, s = 0;

       if (poll)
               s = splbio();
       if (wdc->select)
               wdc->select(chp,0);
       /* assert SRST, wait for reset to complete */
       bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, WDCTL_RST);
       delay(2000);
       (void) bus_space_read_1(wdr->cmd_iot, wdr->cmd_iohs[wd_error], 0);
       bus_space_write_1(wdr->ctl_iot, wdr->ctl_ioh, wd_aux_ctlr, 0);
       delay(10);      /* 400ns delay */
       for (i = 3100000; --i > 0; ) {
               st0 = bus_space_read_1(wdr->cmd_iot,
                   wdr->cmd_iohs[wd_status], 0);
               if ((st0 & WDCS_BSY) == 0)
                       break;
               delay(10);
       }
       if (i == 0)
               printf("%s: reset failed\n", __func__);
       else
               WDC_EXTIO_DPRINTF("%s: reset in %d.%02dms\n", __func__,
                   (3100000 - i) / 100,
                   (3100000 - i) % 100);

       if (poll) {
               /* ACK interrupt in case there is one pending left */
               if (wdc->irqack)
                       wdc->irqack(chp);
               splx(s);
       }
}
#endif

static int
wdc_extio_map(struct extio_attach_args *ea, struct wdc_regs *wdr,
   void **gpio, struct gpio_pinmap *pinmap)
{
       int i;

       *gpio = ea->ea_gpio;
       wdr->cmd_iot = wdr->ctl_iot = ea->ea_st;

#if 0
       if (gpio_pin_map(ea->ea_gpio, 0, ea->ea_gpio_mask, pinmap) != 0) {
               printf("%s: couldn't map GPIO\n", __func__);
               return -1;
       }
#endif

       if (bus_space_map(wdr->cmd_iot, ea->ea_addr, WDC_OBIO_CF_WINSIZE, 0,
                         &wdr->cmd_baseioh)) {
               aprint_error("%s: couldn't map registers\n", __func__);
               goto post_gpio_err;
       }

       for (i = 1; i < WDC_NREG; i++) {
               if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                                       WDC_OBIO_REG_OFFSET + i, 1,
                                       &wdr->cmd_iohs[i]) != 0) {
                       aprint_error(
                           "%s: unable to subregion control register\n",
                           __func__);
                       goto post_bus_err;
               }
       }
       if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                               WDC_OBIO_DATA_OFFSET, 2,
                               &wdr->cmd_iohs[wd_data]) != 0) {
               aprint_error("%s: unable to subregion data register\n",
                   __func__);
               goto post_bus_err;
       }
       if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
                               WDC_OBIO_AUXREG_OFFSET, 1, &wdr->ctl_ioh)) {
               aprint_error("%s: unable to subregion aux register\n",
                   __func__);
               goto post_bus_err;
       }

       wdc_init_shadow_regs(wdr);

       return 0;
post_bus_err:
       bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, WDC_OBIO_CF_WINSIZE);
post_gpio_err:
#if 0
       gpio_pin_unmap(ea->ea_gpio, pinmap);
#endif
       return -1;
}

static void
wdc_extio_dataout(struct ata_channel *chp, int flags, void *bf, size_t len)
{
       struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp);

       bus_space_write_multi_1(
           wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len);
}

static void
wdc_extio_datain(struct ata_channel *chp, int flags, void *bf, size_t len)
{
       struct wdc_regs *wdr = CHAN_TO_WDC_REGS(chp);

       bus_space_read_multi_1(
           wdr->cmd_iot, wdr->cmd_iohs[wd_data], 0, bf, len);
}

int
wdc_extio_match(device_t parent, cfdata_t cf, void *aux)
{
       struct extio_attach_args *ea = (struct extio_attach_args *)aux;
       struct wdc_regs wdr;
       int result = 0;
       void *gpio;
       int map;
       struct gpio_pinmap pm = {.pm_map = &map};

       if (strcmp(ea->ea_name, cf->cf_name) != 0)
               return 0;

       WDC_EXTIO_DPRINTF("%s: enter\n", __func__);

#if 0
       wdc.datain_pio = wdc_extio_datain;
       wdc.dataout_pio = wdc_extio_dataout;
       if (cf->cf_flags != -1) {
               wdc.sc_atac.atac_cap |= cf->cf_flags &
                   (ATAC_CAP_NOIRQ|ATAC_CAP_DATA32|ATAC_CAP_DATA16);
               wdc.cap |= cf->cf_flags &
                   (WDC_CAPABILITY_PREATA|WDC_CAPABILITY_NO_EXTRA_RESETS);
       }
#endif

       if (wdc_extio_map(ea, &wdr, &gpio, &pm) == -1)
               return 0;

       result = wdcprobe(&wdr);

       bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, WDC_OBIO_CF_WINSIZE);
#if 0
       gpio_pin_unmap(ea->ea_gpio, &pm);
#endif

       return result;
}

void
wdc_extio_attach(device_t parent, device_t self, void *aux)
{
       struct wdc_extio_softc *sc = device_private(self);
       struct wdc_regs *wdr;
       struct extio_attach_args *ea = aux;
       struct ata_channel *chp = &sc->sc_channel;
       struct cfdata *cf;

       WDC_EXTIO_DPRINTF("%s: enter\n", __func__);

       sc->sc_wdcdev.sc_atac.atac_dev = self;
       sc->sc_pinmap.pm_map = &sc->sc_map;
       sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs;
       chp->ch_atac = &sc->sc_wdcdev.sc_atac;

       if (wdc_extio_map(ea, wdr, &sc->sc_gpio, &sc->sc_pinmap) == -1)
               return;

       cf = device_cfdata(sc->sc_wdcdev.sc_atac.atac_dev);
       if (cf->cf_flags != -1) {
               aprint_normal(" flags %04x", cf->cf_flags);
               sc->sc_wdcdev.sc_atac.atac_cap |= cf->cf_flags &
                   (ATAC_CAP_NOIRQ|ATAC_CAP_DATA32|ATAC_CAP_DATA16);
               sc->sc_wdcdev.cap |= cf->cf_flags &
                   (WDC_CAPABILITY_PREATA|WDC_CAPABILITY_NO_EXTRA_RESETS);
       }
       sc->sc_wdcdev.datain_pio = wdc_extio_datain;
       sc->sc_wdcdev.dataout_pio = wdc_extio_dataout;
       sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
       sc->sc_chanlist[0] = chp;
       sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist;
       sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
       sc->sc_wdcdev.wdc_maxdrives = 2;

       chp->ch_channel = 0;
       chp->ch_atac = &sc->sc_wdcdev.sc_atac;

       aprint_normal("\n");

       wdcattach(chp);
}

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