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      1 /*	$NetBSD: obio_wdc.c,v 1.12 2022/09/27 06:36:41 skrll Exp $	*/
      2 
      3 /* adapted from iq31244/wdc_obio.c:
      4  *	NetBSD: wdc_obio.c,v 1.5 2008/04/28 20:23:16 martin Exp
      5  */
      6 
      7 /*-
      8  * Copyright (c) 1998, 2003, 2005 The NetBSD Foundation, Inc.
      9  * All rights reserved.
     10  *
     11  * This code is derived from software contributed to The NetBSD Foundation
     12  * by Charles M. Hannum and by Onno van der Linden.
     13  *
     14  * Redistribution and use in source and binary forms, with or without
     15  * modification, are permitted provided that the following conditions
     16  * are met:
     17  * 1. Redistributions of source code must retain the above copyright
     18  *    notice, this list of conditions and the following disclaimer.
     19  * 2. Redistributions in binary form must reproduce the above copyright
     20  *    notice, this list of conditions and the following disclaimer in the
     21  *    documentation and/or other materials provided with the distribution.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <sys/cdefs.h>
     37 __KERNEL_RCSID(0, "$NetBSD: obio_wdc.c,v 1.12 2022/09/27 06:36:41 skrll Exp $");
     38 
     39 #include "locators.h"
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/device.h>
     44 
     45 #include <sys/bus.h>
     46 #include <machine/intr.h>
     47 
     48 #include <arm/gemini/gemini_var.h>
     49 #include <arm/gemini/gemini_reg.h>
     50 #include <arm/gemini/gemini_obiovar.h>
     51 
     52 #include <dev/ic/wdcreg.h>
     53 #include <dev/ata/atavar.h>
     54 #include <dev/ic/wdcvar.h>
     55 
     56 struct wdc_obio_softc {
     57 	struct	wdc_softc sc_wdcdev;
     58 	struct	ata_channel *wdc_chanlist[1];
     59 	struct	ata_channel ata_channel;
     60 	struct	wdc_regs wdc_regs;
     61 	void	*sc_ih;
     62 };
     63 
     64 static int	wdc_obio_match(device_t, cfdata_t, void *);
     65 static void	wdc_obio_attach(device_t, device_t, void *);
     66 
     67 CFATTACH_DECL_NEW(wdc_obio, sizeof(struct wdc_obio_softc),
     68     wdc_obio_match, wdc_obio_attach, NULL, NULL);
     69 
     70 static int
     71 wdc_obio_match(device_t parent, cfdata_t match, void *aux)
     72 {
     73 	struct obio_attach_args * const obio = aux;
     74 
     75 	if (obio->obio_addr == GEMINI_MIDE_BASEn(0)
     76 	||  obio->obio_addr == GEMINI_MIDE_BASEn(1))
     77 		return 1;
     78 
     79         return 0;
     80 
     81 }
     82 
     83 static void
     84 wdc_obio_attach(device_t parent, device_t self, void *aux)
     85 {
     86 	struct wdc_obio_softc *sc = device_private(self);
     87 	struct wdc_regs *wdr;
     88 	struct obio_attach_args *obio = aux;
     89 	uint chan;
     90 	int i;
     91 
     92 	/*
     93 	 * we treat the two channels of the Gemini MIDE controller
     94 	 * as separate wdc controllers, because they have
     95 	 * independent interrupts.  'chan' here is a MIDE channel,
     96 	 * (not to be confused with ATA channel).
     97 	 */
     98 	switch (obio->obio_addr) {
     99 	case  GEMINI_MIDE_BASEn(0):
    100 		chan = 0;
    101 		break;
    102 	case  GEMINI_MIDE_BASEn(1):
    103 		chan = 1;
    104 		break;
    105 	default:
    106 		panic("wdc_obio_attach: bad address");
    107 	}
    108 
    109 	sc->sc_wdcdev.sc_atac.atac_dev = self;
    110 	sc->sc_wdcdev.regs = wdr = &sc->wdc_regs;
    111 	wdr->cmd_iot = obio->obio_iot;
    112 	wdr->ctl_iot = obio->obio_iot;
    113 	if (bus_space_map(wdr->cmd_iot, obio->obio_addr, GEMINI_MIDE_SIZE,
    114 	    0, &wdr->cmd_baseioh)) {
    115 		aprint_error(": couldn't map registers\n");
    116 		return;
    117 	}
    118 
    119 	for (i = 0; i < 8; i++) {
    120 		if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh,
    121 		    GEMINI_MIDE_CMDBLK + i, 1, &wdr->cmd_iohs[i]) != 0) {
    122 			aprint_error(": couldn't subregion registers\n");
    123 			return;
    124 		}
    125 	}
    126 
    127 	if (bus_space_subregion(wdr->ctl_iot, wdr->cmd_baseioh,
    128 	    GEMINI_MIDE_CTLBLK, 1, &wdr->ctl_ioh) != 0) {
    129 		aprint_error(": couldn't subregion registers\n");
    130 		return;
    131 	}
    132 
    133 	sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16;
    134 
    135 	sc->sc_wdcdev.sc_atac.atac_pio_cap = 0;
    136 	sc->wdc_chanlist[0] = &sc->ata_channel;
    137 	sc->sc_wdcdev.sc_atac.atac_channels = sc->wdc_chanlist;
    138 	sc->sc_wdcdev.sc_atac.atac_nchannels = 1;
    139 	sc->sc_wdcdev.wdc_maxdrives = 2;
    140 	sc->ata_channel.ch_channel = 0;
    141 	sc->ata_channel.ch_atac = &sc->sc_wdcdev.sc_atac;
    142 
    143 	wdc_init_shadow_regs(wdr);
    144 
    145 	aprint_normal("\n");
    146 
    147 	if (obio->obio_intr != OBIOCF_INTR_DEFAULT)
    148 		sc->sc_ih = intr_establish(obio->obio_intr, IPL_BIO, IST_LEVEL_HIGH,
    149 			wdcintr, &sc->ata_channel);
    150 	else {
    151 		sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_NOIRQ;
    152 		aprint_normal_dev(self, "Using polled I/O\n");
    153 	}
    154 
    155 	wdcattach(&sc->ata_channel);
    156 }
    157