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sti_sgc.c revision 1.1 
      1 /*	$NetBSD: sti_sgc.c,v 1.1 2013/01/11 12:03:03 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 1.1 2013/01/11 12:03:03 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 <dev/wscons/wsdisplayvar.h>
     39 
     40 #include <dev/ic/stireg.h>
     41 #include <dev/ic/stivar.h>
     42 
     43 #include <hp300/dev/sgcvar.h>
     44 
     45 static int sticonslot;
     46 
     47 static int sti_sgc_match(device_t, struct cfdata *, void *);
     48 static void sti_sgc_attach(device_t, device_t, void *);
     49 
     50 static int sti_sgc_probe(bus_space_tag_t, int);
     51 static void sti_sgc_end_attach(device_t);
     52 
     53 CFATTACH_DECL_NEW(sti_sgc, sizeof(struct sti_softc),
     54     sti_sgc_match, sti_sgc_attach, NULL, NULL);
     55 
     56 static int
     57 sti_sgc_match(device_t parent, struct cfdata *cf, void *aux)
     58 {
     59 	struct sgc_attach_args *saa = aux;
     60 
     61 	/*
     62 	 * If we already probed it successfully as a console device, go ahead,
     63 	 * since we will not be able to bus_space_map() again.
     64 	 */
     65 	if (saa->saa_slot == sticonslot)
     66 		return 1;
     67 
     68 	return sti_sgc_probe(saa->saa_iot, saa->saa_slot);
     69 }
     70 
     71 static void
     72 sti_sgc_attach(device_t parent, device_t self, void *aux)
     73 {
     74 	struct sti_softc *sc = device_private(self);
     75 	struct sgc_attach_args *saa = aux;
     76 	bus_space_tag_t iot = saa->saa_iot;
     77 	bus_space_handle_t ioh, romh;
     78 	bus_addr_t pa = (bus_addr_t)sgc_slottopa(saa->saa_slot);
     79 	u_int romend;
     80 	int i;
     81 
     82 	/* XXX: temporalily map before obtain romend. */
     83 #define STI_ROMSIZE_SAFE	(sizeof(struct sti_dd) * 4)
     84 	if (bus_space_map(iot, pa, STI_ROMSIZE_SAFE, 0, &ioh)) {
     85 		aprint_error(": can't map ROM");
     86 		return;
     87 	}
     88 	romend = sti_rom_size(iot, ioh);
     89 	bus_space_unmap(iot, ioh, STI_ROMSIZE_SAFE);
     90 
     91 	sc->sc_dev = self;
     92 	sc->sc_enable_rom = NULL;
     93 	sc->sc_disable_rom = NULL;
     94 
     95 	if (bus_space_map(iot, pa, romend, 0, &romh)) {
     96 		aprint_error(": can't map ROM(2)");
     97 		return;
     98 	}
     99 	sc->bases[0] = romh;
    100 	for (i = 0; i < STI_REGION_MAX; i++)
    101 		sc->bases[i] = pa;
    102 	if (saa->saa_slot == sticonslot)
    103 		sc->sc_flags |= STI_CONSOLE;
    104 	if (sti_attach_common(sc, iot, iot, romh, STI_CODEBASE_ALT) == 0)
    105 		config_interrupts(self, sti_sgc_end_attach);
    106 }
    107 
    108 static int
    109 sti_sgc_probe(bus_space_tag_t iot, int slot)
    110 {
    111 	bus_space_handle_t ioh;
    112 	bus_addr_t pa = (bus_addr_t)sgc_slottopa(slot);
    113 	int devtype;
    114 
    115 	if (bus_space_map(iot, pa, PAGE_SIZE, 0, &ioh))
    116 		return 0;
    117 	devtype = bus_space_read_1(iot, ioh, 3);
    118 	bus_space_unmap(iot, ioh, PAGE_SIZE);
    119 
    120 	/*
    121 	 * This might not be reliable enough. On the other hand, non-STI
    122 	 * SGC cards will apparently not initialize in an hp300, to the
    123 	 * point of not even answering bus probes (checked with an
    124 	 * Harmony/FDDI SGC card).
    125 	 */
    126 	if (devtype != STI_DEVTYPE1 &&
    127 	    devtype != STI_DEVTYPE4)
    128 		return 0;
    129 	return 1;
    130 }
    131 
    132 static void
    133 sti_sgc_end_attach(device_t self)
    134 {
    135 	struct sti_softc *sc = device_private(self);
    136 
    137 	sti_end_attach(sc);
    138 }
    139