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      1 /*	$NetBSD: oioc.c,v 1.6 2021/08/07 16:19:04 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2009 Stephen M. Rumble
      5  * All rights reserved.
      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. The name of the author may not be used to endorse or promote products
     13  *    derived from this software without specific prior written permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 /*
     28  * IOC1/IOC2 chips on IP4 and IP6/IP10 machines. This interfaces the SCSI
     29  * and Ethernet controllers, performs DMA for the former, and does address
     30  * space translation for the latter (maps the lance memory space to physical
     31  * pages).
     32  *
     33  * 'I/O Controller' is a sufficiently generic name that SGI created another
     34  * one for IP24, which basically stuffed a bunch of miscellany on an ASIC.
     35  * So, we'll call ourselves 'Old IOC' and hope that there wasn't an even older
     36  * one.
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: oioc.c,v 1.6 2021/08/07 16:19:04 thorpej Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/device.h>
     44 
     45 #include <machine/cpu.h>
     46 #include <machine/locore.h>
     47 #include <machine/autoconf.h>
     48 #include <sys/bus.h>
     49 #include <machine/machtype.h>
     50 #include <machine/sysconf.h>
     51 
     52 #include <sgimips/ioc/oiocreg.h>
     53 #include <sgimips/ioc/oiocvar.h>
     54 
     55 #include "locators.h"
     56 
     57 struct oioc_softc {
     58 	int			sc_burst_dma;
     59 
     60 	bus_space_tag_t		sc_iot;
     61 	bus_space_handle_t	sc_ioh;
     62 };
     63 
     64 static int      oioc_match(device_t, cfdata_t, void *);
     65 static void     oioc_attach(device_t, device_t, void *);
     66 static int	oioc_print(void *, const char *);
     67 
     68 CFATTACH_DECL_NEW(oioc, sizeof(struct oioc_softc),
     69     oioc_match, oioc_attach, NULL, NULL);
     70 
     71 struct oioc_device {
     72 	const char *od_name;
     73 	int         od_irq;
     74 } oioc_devices[] = {
     75 	{ "oiocsc", 4 },
     76 	{ "le",     5 },
     77 	{ NULL,   0 }
     78 };
     79 
     80 static int
     81 oioc_match(device_t parent, cfdata_t match, void *aux)
     82 {
     83 
     84 	switch(mach_type) {
     85 	case MACH_SGI_IP4:
     86 	case MACH_SGI_IP6 | MACH_SGI_IP10:
     87 		return (1);
     88 	}
     89 
     90 	return (0);
     91 }
     92 
     93 static void
     94 oioc_attach(device_t parent, device_t self, void *aux)
     95 {
     96 	struct oioc_softc *sc = device_private(self);
     97 	struct mainbus_attach_args *ma = aux;
     98 	uint32_t reg1, reg2;
     99 	int oiocrev, i;
    100 
    101 	sc->sc_iot = normal_memt;
    102 	if (bus_space_map(sc->sc_iot, ma->ma_addr, OIOC_SCSI_REGS_SIZE,
    103 	    BUS_SPACE_MAP_LINEAR, &sc->sc_ioh))
    104 		panic("oioc_attach: could not allocate memory\n");
    105 
    106 	if (platform.badaddr((void *)MIPS_PHYS_TO_KSEG1(ma->ma_addr +
    107 	    OIOC2_CONFIG), 4))
    108 		oiocrev = 1;
    109 	else
    110 		oiocrev = 2;
    111 
    112 	printf("\noioc0: Old SGI IOC%d\n", oiocrev);
    113 
    114 	if (oiocrev == 2) {
    115 		char buf[64];
    116 
    117 		/* Try to enable burst mode. If we can't, we can't... */
    118 		reg1  = 12 << OIOC2_CONFIG_HIWAT_SHFT;
    119 		reg1 |= OIOC2_CONFIG_BURST_MASK;
    120 		bus_space_write_4(sc->sc_iot, sc->sc_ioh, OIOC2_CONFIG, reg1);
    121 		DELAY(1000);
    122 		reg2 = bus_space_read_4(sc->sc_iot, sc->sc_ioh, OIOC2_CONFIG);
    123 		if ((reg2 & (reg1 | OIOC2_CONFIG_NOSYNC_MASK)) == reg1)
    124 			sc->sc_burst_dma = 1;
    125 
    126 		snprintb(buf, sizeof(buf),
    127 		    "\177\020"
    128 		    "f\0\4HIWAT\0"
    129 		    "f\4\2ID\0"
    130 		    "b\6NOSYNC\0"
    131 		    "b\7BURST\0"
    132 		    "f\x8\7COUNT\0"
    133 		    "f\x10\6SCP\0"
    134 		    "f\x1c\4IOP\0\0",
    135 		    (u_quad_t)reg2 & 0xffffffff);
    136 		printf("oioc0: %s\n", buf);
    137 	}
    138 
    139 	printf("oioc0: Burst DMA %ssupported\n",
    140 	    (sc->sc_burst_dma) ? "" : "not ");
    141 
    142 	for (i = 0; oioc_devices[i].od_name != NULL; i++) {
    143 		struct oioc_attach_args oa;
    144 
    145 		oa.oa_name      = oioc_devices[i].od_name;
    146 		oa.oa_irq       = oioc_devices[i].od_irq;
    147 		oa.oa_burst_dma = sc->sc_burst_dma;
    148 		oa.oa_st        = normal_memt;
    149 		oa.oa_sh        = sc->sc_ioh;
    150 		oa.oa_dmat      = &sgimips_default_bus_dma_tag;
    151 		config_found(self, &oa, oioc_print, CFARGS_NONE);
    152 	}
    153 }
    154 
    155 static int
    156 oioc_print(void *aux, const char *pnp)
    157 {
    158 	struct oioc_attach_args *oa = aux;
    159 
    160 	if (pnp)
    161 		printf("%s at %s", oa->oa_name, pnp);
    162 
    163 	return (UNCONF);
    164 }
    165