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vrdmaau.c revision 1.7 
      1 /*
      2  * Copyright (c) 2001 HAMAJIMA Katsuomi. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     23  * SUCH DAMAGE.
     24  */
     25 
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: vrdmaau.c,v 1.7 2015/06/09 22:46:36 matt Exp $");
     28 
     29 #include <sys/param.h>
     30 #include <sys/bus.h>
     31 #include <sys/device.h>
     32 #include <sys/systm.h>
     33 
     34 #include <mips/cpuregs.h>
     35 
     36 #include <hpcmips/vr/vripif.h>
     37 #include <hpcmips/vr/dmaaureg.h>
     38 
     39 #ifdef VRDMAAU_DEBUG
     40 int vrdmaau_debug = VRDMAAU_DEBUG;
     41 #define DPRINTFN(n,x) if (vrdmaau_debug>(n)) printf x;
     42 #else
     43 #define DPRINTFN(n,x)
     44 #endif
     45 
     46 struct vrdmaau_softc {
     47 	device_t		sc_dev;
     48 	bus_space_tag_t		sc_iot;
     49 	bus_space_handle_t	sc_ioh;
     50 	struct vrdmaau_chipset_tag	sc_chipset;
     51 };
     52 
     53 int vrdmaau_match(device_t, cfdata_t, void *);
     54 void vrdmaau_attach(device_t, device_t, void *);
     55 
     56 CFATTACH_DECL_NEW(vrdmaau, sizeof(struct vrdmaau_softc),
     57     vrdmaau_match, vrdmaau_attach, NULL, NULL);
     58 
     59 int vrdmaau_set_aiuin(vrdmaau_chipset_tag_t, void *);
     60 int vrdmaau_set_aiuout(vrdmaau_chipset_tag_t, void *);
     61 int vrdmaau_set_fir(vrdmaau_chipset_tag_t, void *);
     62 static int vrdmaau_phy_addr(struct vrdmaau_softc *, void *, u_int32_t *);
     63 
     64 int
     65 vrdmaau_match(device_t parent, cfdata_t cf, void *aux)
     66 {
     67 	return 2; /* 1st attach group of vrip */
     68 }
     69 
     70 void
     71 vrdmaau_attach(device_t parent, device_t self, void *aux)
     72 {
     73 	struct vrip_attach_args *va = aux;
     74 	struct vrdmaau_softc *sc = device_private(self);
     75 
     76 	sc->sc_dev = self;
     77 	sc->sc_iot = va->va_iot;
     78 	sc->sc_chipset.ac_sc = sc;
     79 	sc->sc_chipset.ac_set_aiuin = vrdmaau_set_aiuin;
     80 	sc->sc_chipset.ac_set_aiuout = vrdmaau_set_aiuout;
     81 	sc->sc_chipset.ac_set_fir = vrdmaau_set_fir;
     82 
     83 	if (bus_space_map(sc->sc_iot, va->va_addr, va->va_size,
     84 			  0 /* no flags */, &sc->sc_ioh)) {
     85 		printf(": can't map i/o space\n");
     86 		return;
     87 	}
     88 	printf("\n");
     89 	vrip_register_dmaau(va->va_vc, &sc->sc_chipset);
     90 }
     91 
     92 int
     93 vrdmaau_set_aiuin(vrdmaau_chipset_tag_t ac, void *addr)
     94 {
     95 	struct vrdmaau_softc *sc = ac->ac_sc;
     96 	u_int32_t phy;
     97 	int err;
     98 
     99 	DPRINTFN(1, ("vrdmaau_set_aiuin: address %p\n", addr));
    100 
    101 	if ((err = vrdmaau_phy_addr(sc, addr, &phy)))
    102 		return err;
    103 
    104 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, AIUIBAH_REG_W, phy >> 16);
    105 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, AIUIBAL_REG_W, phy & 0xffff);
    106 	return 0;
    107 }
    108 
    109 int
    110 vrdmaau_set_aiuout(vrdmaau_chipset_tag_t ac, void *addr)
    111 {
    112 	struct vrdmaau_softc *sc = ac->ac_sc;
    113 	u_int32_t phy;
    114 	int err;
    115 
    116 	DPRINTFN(1, ("vrdmaau_set_aiuout: address %p\n", addr));
    117 
    118 	if ((err = vrdmaau_phy_addr(sc, addr, &phy)))
    119 		return err;
    120 
    121 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, AIUOBAH_REG_W, phy >> 16);
    122 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, AIUOBAL_REG_W, phy & 0xffff);
    123 	return 0;
    124 }
    125 
    126 int
    127 vrdmaau_set_fir(vrdmaau_chipset_tag_t ac, void *addr)
    128 {
    129 	struct vrdmaau_softc *sc = ac->ac_sc;
    130 	u_int32_t phy;
    131 	int err;
    132 
    133 	DPRINTFN(1, ("vrdmaau_set_fir: address %p\n", addr));
    134 
    135 	if ((err = vrdmaau_phy_addr(sc, addr, &phy)))
    136 		return err;
    137 
    138 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, FIRBAH_REG_W, phy >> 16);
    139 	bus_space_write_2(sc->sc_iot, sc->sc_ioh, FIRBAL_REG_W, phy & 0xffff);
    140 	return 0;
    141 }
    142 
    143 static int
    144 vrdmaau_phy_addr(struct vrdmaau_softc *sc, void *addr, u_int32_t *phy)
    145 {
    146 	DPRINTFN(1, ("vrdmaau_phy_addr\n"));
    147 
    148 	if (addr >= (void *)MIPS_KSEG0_START &&
    149 	    addr < (void *)MIPS_KSEG1_START)
    150 		*phy = MIPS_KSEG0_TO_PHYS(addr);
    151 	else if (addr >= (void *)MIPS_KSEG1_START &&
    152 		 addr < (void *)MIPS_KSEG2_START)
    153 		*phy = MIPS_KSEG1_TO_PHYS(addr);
    154 	else {
    155 		DPRINTFN(0, ("vrdmaau_map_addr: invalid address %p\n", addr));
    156 		return EFAULT;
    157 	}
    158 
    159 #ifdef DIAGNOSTIC
    160 	if ((*phy & (VRDMAAU_ALIGNMENT - 1)) ||
    161 	    *phy >= VRDMAAU_BOUNCE_THRESHOLD ) {
    162 		printf("%s: vrdmaau_phy_addr: invalid address %p\n",
    163 		       device_xname(sc->sc_dev), addr);
    164 		return EINVAL;
    165 	}
    166 #endif
    167 	return 0;
    168 }
    169