304 lines
7.7 KiB
C
304 lines
7.7 KiB
C
/* $NetBSD: bcu_vrip.c,v 1.5 2000/01/27 06:25:54 sato Exp $ */
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/*-
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* Copyright (c) 1999 SATO Kazumi. All rights reserved.
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* Copyright (c) 1999 PocketBSD Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the PocketBSD project
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* and its contributors.
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* 4. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/reboot.h>
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#include <machine/bus.h>
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#include <mips/cpuregs.h>
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#include <hpcmips/vr/vr.h>
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#include <hpcmips/vr/vripvar.h>
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#include <hpcmips/vr/vripreg.h>
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#include <hpcmips/vr/bcureg.h>
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#include <hpcmips/vr/bcuvar.h>
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static int vrbcu_match __P((struct device *, struct cfdata *, void *));
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static void vrbcu_attach __P((struct device *, struct device *, void *));
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static void vrbcu_write __P((struct vrbcu_softc *, int, unsigned short));
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static unsigned short vrbcu_read __P((struct vrbcu_softc *, int));
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static void vrbcu_dump_regs __P((void));
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char *vr_cpuname=NULL;
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int vr_major=-1;
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int vr_minor=-1;
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int vr_cpuid=-1;
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struct cfattach vrbcu_ca = {
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sizeof(struct vrbcu_softc), vrbcu_match, vrbcu_attach
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};
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struct vrbcu_softc *the_bcu_sc = NULL;
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static inline void
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vrbcu_write(sc, port, val)
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struct vrbcu_softc *sc;
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int port;
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unsigned short val;
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{
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bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
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}
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static inline unsigned short
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vrbcu_read(sc, port)
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struct vrbcu_softc *sc;
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int port;
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{
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return bus_space_read_2(sc->sc_iot, sc->sc_ioh, port);
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}
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static int
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vrbcu_match(parent, cf, aux)
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struct device *parent;
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struct cfdata *cf;
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void *aux;
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{
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return 2;
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}
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static void
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vrbcu_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct vrip_attach_args *va = aux;
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struct vrbcu_softc *sc = (struct vrbcu_softc *)self;
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sc->sc_iot = va->va_iot;
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bus_space_map(sc->sc_iot, va->va_addr, va->va_size,
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0, /* no flags */
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&sc->sc_ioh);
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printf("\n");
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the_bcu_sc = sc;
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vrbcu_dump_regs();
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}
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static void
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vrbcu_dump_regs()
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{
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struct vrbcu_softc *sc = the_bcu_sc;
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int reg;
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int cpuclock, tclock, vtclock, cpuid, vt;
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#ifdef VRBCUDEBUG
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reg = vrbcu_read(sc, BCUCNT1_REG_W);
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printf("vrbcu: CNT1 %x: ", reg);
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bitdisp16(reg);
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reg = vrbcu_read(sc, BCUCNT2_REG_W);
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printf("vrbcu: CNT2 %x: ", reg);
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bitdisp16(reg);
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reg = vrbcu_read(sc, BCUSPEED_REG_W);
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printf("vrbcu: SPEED %x: ", reg);
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bitdisp16(reg);
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reg = vrbcu_read(sc, BCUERRST_REG_W);
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printf("vrbcu: ERRST %x: ", reg);
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bitdisp16(reg);
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reg = vrbcu_read(sc, BCURFCNT_REG_W);
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printf("vrbcu: RFCNT %x\n", reg);
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reg = vrbcu_read(sc, BCUREFCOUNT_REG_W);
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printf("vrbcu: RFCOUNT %x\n", reg);
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#endif /* VRBCUDEBUG */
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reg = vrbcu_read(sc, BCUCLKSPEED_REG_W);
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#ifdef VRBCUDEBUG
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printf("vrbcu: CLKSPEED %x: \n", reg);
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#endif /* VRBCUDEBUG */
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cpuclock = vrbcu_vrip_getcpuclock();
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cpuid = vrbcu_vrip_getcpuid();
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switch (cpuid) {
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case BCUREVID_RID_4101:
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/* assume 33MHz */
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vtclock = tclock = cpuclock/2; /* XXX */
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break;
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case BCUREVID_RID_4102:
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vtclock = tclock = cpuclock/2;
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break;
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case BCUREVID_RID_4111:
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if ((reg&BCUCLKSPEED_DIVT2B) == 0)
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vtclock = tclock = cpuclock/2;
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else if ((reg&BCUCLKSPEED_DIVT3B) == 0)
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vtclock = tclock = cpuclock/3;
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else if ((reg&BCUCLKSPEED_DIVT4B) == 0)
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vtclock = tclock = cpuclock/4;
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else
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vtclock = tclock = 0; /* XXX */
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break;
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case BCUREVID_RID_4121:
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tclock = cpuclock / ((reg&BCUCLKSPEED_DIVTMASK)>>BCUCLKSPEED_DIVTSHFT);
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vt = ((reg&BCUCLKSPEED_DIVVTMASK)>>BCUCLKSPEED_DIVVTSHFT);
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if (vt == 0)
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vtclock = 0; /* XXX */
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else if (vt < 0x9)
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vtclock = cpuclock / vt;
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else
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vtclock = cpuclock / ((vt - 8)*2+1) * 2;
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break;
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default:
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break;
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}
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printf("vrbcu: cpu %d.%03dMHz, bus %d.%03dMHz, ram %d.%03dMHz\n",
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cpuclock/1000000, (cpuclock%1000000)/1000,
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tclock/1000000, (tclock%1000000)/1000,
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vtclock/1000000, (vtclock%1000000)/1000);
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#ifdef VRBCUDEBUG
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if (cpuid >= BCUREVID_RID_4111) {
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reg = vrbcu_read(sc, BCUCNT3_REG_W);
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printf("vrbcu: CNT3 %x: ", reg);
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bitdisp16(reg);
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}
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#endif /* VRBCUDEBUG */
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}
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static char *cpuname[] = {
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"VR4101",
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"VR4102",
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"VR4111",
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"VR4121",
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"UNKNOWN",
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"UNKNOWN",
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"UNKNOWN",
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"UNKNOWN" };
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int
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vrbcu_vrip_getcpuid(void)
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{
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volatile u_int16_t *revreg;
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if (vr_cpuid != -1)
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return vr_cpuid;
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if (vr_cpuid == -1) {
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revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W));
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vr_cpuid = *revreg;
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vr_cpuid = (vr_cpuid&BCUREVID_RIDMASK)>>BCUREVID_RIDSHFT;
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}
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return vr_cpuid;
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}
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char *
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vrbcu_vrip_getcpuname(void)
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{
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int cpuid;
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if (vr_cpuname != NULL)
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return vr_cpuname;
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cpuid = vrbcu_vrip_getcpuid();
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vr_cpuname = cpuname[cpuid];
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return vr_cpuname;
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}
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int
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vrbcu_vrip_getcpumajor(void)
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{
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volatile u_int16_t *revreg;
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if (vr_major != -1)
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return vr_major;
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revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W));
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vr_major = *revreg;
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vr_major = (vr_major&BCUREVID_MJREVMASK)>>BCUREVID_MJREVSHFT;
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return vr_major;
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}
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int
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vrbcu_vrip_getcpuminor(void)
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{
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volatile u_int16_t *revreg;
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if (vr_minor != -1)
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return vr_minor;
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revreg = (u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUREVID_REG_W));
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vr_minor = *revreg;
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vr_minor = (vr_minor&BCUREVID_MNREVMASK)>>BCUREVID_MNREVSHFT;
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return vr_minor;
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}
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#define CLKX 18432000 /* CLKX1,CLKX2: 18.432MHz */
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#define MHZ 1000000
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int
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vrbcu_vrip_getcpuclock(void)
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{
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u_int16_t clksp;
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int cpuid, cpuclock;
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clksp = *(u_int16_t *)MIPS_PHYS_TO_KSEG1((VRIP_BCU_ADDR+BCUCLKSPEED_REG_W)) & BCUCLKSPEED_CLKSPMASK;
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cpuid = vrbcu_vrip_getcpuid();
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switch (cpuid) {
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case BCUREVID_RID_4101:
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/* assume 33MHz */
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cpuclock = 33000000;
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/* branch delay is 1 clock; 2 clock/loop */
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cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ;
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break;
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case BCUREVID_RID_4102:
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cpuclock = CLKX / clksp * 32;
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/* branch delay is 1 clock; 2 clock/loop */
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cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ;
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break;
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case BCUREVID_RID_4111:
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cpuclock = CLKX / clksp * 64;
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/* branch delay is 1 clock; 2 clock/loop */
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cpuspeed = (cpuclock / 2 + MHZ / 2) / MHZ;
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break;
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case BCUREVID_RID_4121:
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cpuclock = CLKX / clksp * 64;
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/* branch delay is 2 clock; 3 clock/loop */
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cpuspeed = (cpuclock / 3 + MHZ / 2) / MHZ;
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break;
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default:
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panic("unknown CPU type %d\n", cpuid);
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break;
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}
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return cpuclock;
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}
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