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      1 /*	$NetBSD: sti_sgc.c,v 1.10 2025/05/28 17:33:38 tsutsui Exp $	*/
      2 /*	$OpenBSD: sti_sgc.c,v 1.14 2007/05/26 00:36:03 krw Exp $	*/
      3 
      4 /*
      5  * Copyright (c) 2005, Miodrag Vallat
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     18  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     19  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
     20  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     21  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
     22  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     24  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
     25  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  *
     28  */
     29 #include <sys/cdefs.h>
     30 __KERNEL_RCSID(0, "$NetBSD: sti_sgc.c,v 1.10 2025/05/28 17:33:38 tsutsui Exp $");
     31 
     32 #include <sys/param.h>
     33 #include <sys/device.h>
     34 #include <sys/bus.h>
     35 
     36 #include <uvm/uvm_extern.h>
     37 
     38 #include <hp300/dev/sgcvar.h>
     39 #include <hp300/dev/sti_sgcvar.h>
     40 #include <hp300/dev/sti_machdep.h>
     41 
     42 static int sticonslot = -1;
     43 
     44 static int sti_sgc_match(device_t, struct cfdata *, void *);
     45 static void sti_sgc_attach(device_t, device_t, void *);
     46 
     47 static int sti_sgc_probe(bus_space_tag_t, int);
     48 
     49 CFATTACH_DECL_NEW(sti_sgc, sizeof(struct sti_machdep_softc),
     50     sti_sgc_match, sti_sgc_attach, NULL, NULL);
     51 
     52 static int
     53 sti_sgc_match(device_t parent, struct cfdata *cf, void *aux)
     54 {
     55 	struct sgc_attach_args *saa = aux;
     56 
     57 	/*
     58 	 * If we already probed it successfully as a console device, go ahead,
     59 	 * since we will not be able to bus_space_map() again.
     60 	 */
     61 	if (saa->saa_slot == sticonslot)
     62 		return 1;
     63 
     64 	return sti_sgc_probe(saa->saa_iot, saa->saa_slot);
     65 }
     66 
     67 static void
     68 sti_sgc_attach(device_t parent, device_t self, void *aux)
     69 {
     70 	struct sti_machdep_softc *sc = device_private(self);
     71 	struct sti_softc *ssc = &sc->sc_sti;
     72 	struct sgc_attach_args *saa = aux;
     73 	bus_space_tag_t bst;
     74 	bus_space_handle_t romh;
     75 	bus_addr_t base;
     76 	u_int romend;
     77 	int i;
     78 
     79 	ssc->sc_dev = self;
     80 	bst = saa->saa_iot;
     81 	base = (bus_addr_t)sgc_slottopa(saa->saa_slot);
     82 	sc->sc_base = base;
     83 
     84 	if (saa->saa_slot == sticonslot) {
     85 		sti_machdep_attach_console(sc);
     86 	} else {
     87 		if (bus_space_map(bst, base, PAGE_SIZE, 0, &romh)) {
     88 			aprint_error(": can't map ROM");
     89 			return;
     90 		}
     91 		/*
     92 		 * Compute real PROM size
     93 		 */
     94 		romend = sti_rom_size(bst, romh);
     95 
     96 		bus_space_unmap(bst, romh, PAGE_SIZE);
     97 
     98 		if (bus_space_map(bst, base, romend, 0, &romh)) {
     99 			aprint_error(": can't map frame buffer");
    100 			return;
    101 		}
    102 
    103 		ssc->bases[0] = romh;
    104 		for (i = 0; i < STI_REGION_MAX; i++)
    105 			ssc->bases[i] = base;
    106 
    107 		if (sti_attach_common(ssc, bst, bst, romh,
    108 		    STI_CODEBASE_M68K) != 0)
    109 			return;
    110 	}
    111 
    112 	sti_machdep_attach(sc);
    113 }
    114 
    115 static int
    116 sti_sgc_probe(bus_space_tag_t iot, int slot)
    117 {
    118 	bus_space_handle_t ioh;
    119 	int devtype;
    120 
    121 	if (bus_space_map(iot, (bus_addr_t)sgc_slottopa(slot),
    122 	    PAGE_SIZE, 0, &ioh))
    123 		return 0;
    124 
    125 	devtype = bus_space_read_1(iot, ioh, 3);
    126 
    127 	bus_space_unmap(iot, ioh, PAGE_SIZE);
    128 
    129 	/*
    130 	 * This might not be reliable enough. On the other hand, non-STI
    131 	 * SGC cards will apparently not initialize in the hp300, to the
    132 	 * point of not even answering bus probes (checked with an
    133 	 * Harmony/FDDI SGC card).
    134 	 */
    135 	if (devtype != STI_DEVTYPE1 && devtype != STI_DEVTYPE4)
    136 		return 0;
    137 
    138 	return 1;
    139 }
    140 
    141 int
    142 sti_sgc_cnprobe(bus_space_tag_t bst, int slot)
    143 {
    144 	void *va;
    145 	bus_space_handle_t romh;
    146 	bus_addr_t base;
    147 	int devtype, rv = 0;
    148 
    149 	base = sgc_slottopa(slot);
    150 	if (bus_space_map(bst, base, PAGE_SIZE, 0, &romh))
    151 		return 0;
    152 
    153 	va = bus_space_vaddr(bst, romh);
    154 	if (badaddr(va))
    155 		goto out;
    156 
    157 	devtype = bus_space_read_1(bst, romh, 3);
    158 	if (devtype == STI_DEVTYPE1 || devtype == STI_DEVTYPE4)
    159 		rv = 1;
    160 
    161  out:
    162 	bus_space_unmap(bst, romh, PAGE_SIZE);
    163 	return rv;
    164 }
    165 
    166 void
    167 sti_sgc_cnattach(bus_space_tag_t bst, int slot)
    168 {
    169 	paddr_t base;
    170 
    171 	base = sgc_slottopa(slot);
    172 
    173 	sti_machdep_cnattach(bst, base);
    174 
    175 	sticonslot = slot;
    176 }
    177