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      1 /*	$NetBSD: wax.c,v 1.5 2025/02/24 20:23:30 andvar Exp $	*/
      2 
      3 /*	$OpenBSD: wax.c,v 1.1 1998/11/23 03:04:10 mickey Exp $	*/
      4 
      5 /*
      6  * Copyright (c) 1998-2003 Michael Shalayeff
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     21  * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
     22  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     24  * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     26  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
     27  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     28  * THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include <sys/cdefs.h>
     32 __KERNEL_RCSID(0, "$NetBSD: wax.c,v 1.5 2025/02/24 20:23:30 andvar Exp $");
     33 
     34 #include <sys/param.h>
     35 #include <sys/systm.h>
     36 #include <sys/device.h>
     37 #include <sys/reboot.h>
     38 
     39 #include <machine/iomod.h>
     40 #include <machine/autoconf.h>
     41 
     42 #include <hppa/dev/cpudevs.h>
     43 
     44 #include <hppa/gsc/gscbusvar.h>
     45 
     46 #define	WAX_IOMASK	0xfff00000
     47 #define	WAX_REGS	0xc000
     48 
     49 struct wax_regs {
     50 	uint32_t wax_irr;	/* int request register */
     51 	uint32_t wax_imr;	/* int mask register */
     52 	uint32_t wax_ipr;	/* int pending register */
     53 	uint32_t wax_icr;	/* int control register */
     54 	uint32_t wax_iar;	/* int address register */
     55 };
     56 
     57 struct wax_softc {
     58 	device_t sc_dv;
     59 	struct hppa_interrupt_register sc_ir;
     60 	struct wax_regs volatile *sc_regs;
     61 };
     62 
     63 int	waxmatch(device_t, cfdata_t, void *);
     64 void	waxattach(device_t, device_t, void *);
     65 
     66 
     67 CFATTACH_DECL_NEW(wax, sizeof(struct wax_softc),
     68     waxmatch, waxattach, NULL, NULL);
     69 
     70 static int wax_attached;
     71 
     72 /*
     73  * Before a module is matched, this fixes up its gsc_attach_args.
     74  */
     75 static void wax_fix_args(void *, struct gsc_attach_args *);
     76 static void
     77 wax_fix_args(void *_sc, struct gsc_attach_args *ga)
     78 {
     79 	struct wax_softc *sc = _sc;
     80 	hppa_hpa_t module_offset;
     81 
     82 	/*
     83 	 * Determine this module's interrupt bit.
     84 	 */
     85 	module_offset = ga->ga_hpa - (hppa_hpa_t) sc->sc_regs;
     86 	ga->ga_irq = HPPACF_IRQ_UNDEF;
     87 	if (module_offset == 0x1000)	/* hil */
     88 		ga->ga_irq = 1;
     89 	if (module_offset == 0x2000)	/* com */
     90 		ga->ga_irq = 6;
     91 }
     92 
     93 int
     94 waxmatch(device_t parent, cfdata_t cf, void *aux)
     95 {
     96 	struct confargs *ca = aux;
     97 
     98 	/* there will be only one */
     99 	if (wax_attached ||
    100 	    ca->ca_type.iodc_type != HPPA_TYPE_BHA ||
    101 	    ca->ca_type.iodc_sv_model != HPPA_BHA_WAX)
    102 		return 0;
    103 
    104 	return 1;
    105 }
    106 
    107 void
    108 waxattach(device_t parent, device_t self, void *aux)
    109 {
    110 	struct confargs *ca = aux;
    111 	struct wax_softc *sc = device_private(self);
    112 	struct gsc_attach_args ga;
    113 	struct cpu_info *ci = &cpus[0];
    114 	bus_space_handle_t ioh;
    115 	int s;
    116 
    117 	ca->ca_irq = hppa_intr_allocate_bit(&ci->ci_ir, ca->ca_irq);
    118 	if (ca->ca_irq == HPPACF_IRQ_UNDEF) {
    119 		aprint_error(": can't allocate interrupt\n");
    120 		return;
    121 	}
    122 
    123 	sc->sc_dv = self;
    124 	wax_attached = 1;
    125 
    126 	aprint_normal("\n");
    127 
    128 	/*
    129 	 * Map the WAX interrupt registers.
    130 	 */
    131 	if (bus_space_map(ca->ca_iot, ca->ca_hpa, sizeof(struct wax_regs),
    132 	    0, &ioh)) {
    133 		aprint_error(": can't map interrupt registers\n");
    134 		return;
    135 	}
    136 	sc->sc_regs = (struct wax_regs *)ca->ca_hpa;
    137 
    138 	/* interrupts guts */
    139 	s = splhigh();
    140 	sc->sc_regs->wax_iar = ci->ci_hpa | (31 - ca->ca_irq);
    141 	sc->sc_regs->wax_icr = 0;
    142 	sc->sc_regs->wax_imr = 0;
    143 	(void)sc->sc_regs->wax_irr;
    144 	splx(s);
    145 
    146 	/* Establish the interrupt register. */
    147 	hppa_interrupt_register_establish(ci, &sc->sc_ir);
    148 	sc->sc_ir.ir_name = device_xname(self);
    149 	sc->sc_ir.ir_mask = &sc->sc_regs->wax_imr;
    150 	sc->sc_ir.ir_req = &sc->sc_regs->wax_irr;
    151 
    152 	/* Attach the GSC bus. */
    153 	ga.ga_ca = *ca;	/* clone from us */
    154 	if (strcmp(device_xname(parent), "mainbus0") == 0) {
    155 		ga.ga_dp.dp_bc[0] = ga.ga_dp.dp_bc[1];
    156 		ga.ga_dp.dp_bc[1] = ga.ga_dp.dp_bc[2];
    157 		ga.ga_dp.dp_bc[2] = ga.ga_dp.dp_bc[3];
    158 		ga.ga_dp.dp_bc[3] = ga.ga_dp.dp_bc[4];
    159 		ga.ga_dp.dp_bc[4] = ga.ga_dp.dp_bc[5];
    160 		ga.ga_dp.dp_bc[5] = ga.ga_dp.dp_mod;
    161 		ga.ga_dp.dp_mod = 0;
    162 	}
    163 
    164 	ga.ga_name = "gsc";
    165 	ga.ga_ir = &sc->sc_ir;
    166 	ga.ga_fix_args = wax_fix_args;
    167 	ga.ga_fix_args_cookie = sc;
    168 	ga.ga_scsi_target = 7; /* XXX */
    169 	config_found(self, &ga, gscprint, CFARGS_NONE);
    170 }
    171