235 lines
7.5 KiB
C
235 lines
7.5 KiB
C
/* $NetBSD: opb.c,v 1.20 2005/08/26 13:19:37 drochner Exp $ */
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/*
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* Copyright 2001,2002 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
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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 for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1996 Christopher G. Demetriou. 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 Christopher G. Demetriou
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* for the NetBSD Project.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: opb.c,v 1.20 2005/08/26 13:19:37 drochner Exp $");
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#include "locators.h"
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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/extent.h>
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#include <powerpc/spr.h>
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#include <powerpc/ibm4xx/dev/opbvar.h>
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#include <powerpc/ibm4xx/dev/plbvar.h>
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#include <powerpc/ibm4xx/ibm405gp.h>
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/*
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* The devices on the On-chip Peripheral Bus to the 405GP CPU.
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*/
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const struct opb_dev {
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int pvr;
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const char *name;
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bus_addr_t addr;
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int irq;
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} opb_devs [] = {
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/* IBM405GP */
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{ IBM405GP, "com", IBM405GP_UART0_BASE, 0 },
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{ IBM405GP, "com", IBM405GP_UART1_BASE, 1 },
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{ IBM405GP, "emac", IBM405GP_EMAC0_BASE, 9 }, /* XXX: really irq 9..15 */
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{ IBM405GP, "gpio", IBM405GP_GPIO0_BASE, -1 },
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{ IBM405GP, "gpiic",IBM405GP_IIC0_BASE, 2 },
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{ IBM405GP, "wdog", -1, -1 },
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/* IBM405GPR */
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{ IBM405GPR, "com", IBM405GP_UART0_BASE, 0 },
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{ IBM405GPR, "com", IBM405GP_UART1_BASE, 1 },
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{ IBM405GPR, "emac", IBM405GP_EMAC0_BASE, 9 }, /* XXX: really irq 9..15 */
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{ IBM405GPR, "gpio", IBM405GP_GPIO0_BASE, -1 },
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{ IBM405GPR, "gpiic",IBM405GP_IIC0_BASE, 2 },
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{ IBM405GPR, "wdog", -1, -1 },
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{ 0, NULL }
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};
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const struct opb_limit {
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int pvr;
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bus_addr_t base;
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bus_addr_t limit;
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} opb_limits[] = {
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{ IBM405GP, IBM405GP_UART0_BASE, IBM405GP_UART0_BASE + 0xfff },
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{ IBM405GPR, IBM405GP_UART0_BASE, IBM405GP_UART0_BASE + 0xfff },
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{ 0, 0, 0 }
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};
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static int opb_match(struct device *, struct cfdata *, void *);
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static void opb_attach(struct device *, struct device *, void *);
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static int opb_submatch(struct device *, struct cfdata *,
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const int *, void *);
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static int opb_print(void *, const char *);
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CFATTACH_DECL(opb, sizeof(struct device),
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opb_match, opb_attach, NULL, NULL);
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static struct powerpc_bus_space opb_tag = {
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_BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
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0x0, IBM405GP_UART0_BASE, 0x1000
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};
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static char ex_storage[EXTENT_FIXED_STORAGE_SIZE(8)]
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__attribute__((aligned(8)));
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static int opb_tag_init_done;
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/*
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* Probe for the opb; always succeeds.
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*/
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static int
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opb_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct opb_attach_args *oaa = aux;
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/* match only opb devices */
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if (strcmp(oaa->opb_name, cf->cf_name) != 0)
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return (0);
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return (1);
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}
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static int
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opb_submatch(struct device *parent, struct cfdata *cf,
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const int *ldesc, void *aux)
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{
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struct opb_attach_args *oaa = aux;
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if (cf->cf_loc[OPBCF_ADDR] != OPBCF_ADDR_DEFAULT &&
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cf->cf_loc[OPBCF_ADDR] != oaa->opb_addr)
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return (0);
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return (config_match(parent, cf, aux));
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}
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/*
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* Attach the on-chip peripheral bus.
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*/
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static void
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opb_attach(struct device *parent, struct device *self, void *aux)
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{
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struct plb_attach_args *paa = aux;
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struct opb_attach_args oaa;
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bus_space_tag_t tag;
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int i, pvr;
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printf("\n");
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pvr = mfpvr() >> 16;
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tag = opb_get_bus_space_tag();
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for (i = 0; opb_devs[i].name != NULL; i++) {
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if (opb_devs[i].pvr != pvr)
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continue;
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oaa.opb_name = opb_devs[i].name;
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oaa.opb_addr = opb_devs[i].addr;
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oaa.opb_irq = opb_devs[i].irq;
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oaa.opb_bt = tag;
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oaa.opb_dmat = paa->plb_dmat;
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(void) config_found_sm_loc(self, "opb", NULL, &oaa, opb_print,
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opb_submatch);
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}
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}
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static int
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opb_print(void *aux, const char *pnp)
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{
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struct opb_attach_args *oaa = aux;
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if (pnp)
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aprint_normal("%s at %s", oaa->opb_name, pnp);
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if (oaa->opb_addr != OPBCF_ADDR_DEFAULT)
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aprint_normal(" addr 0x%08lx", oaa->opb_addr);
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if (oaa->opb_irq != OPBCF_IRQ_DEFAULT)
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aprint_normal(" irq %d", oaa->opb_irq);
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return (UNCONF);
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}
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bus_space_tag_t
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opb_get_bus_space_tag(void)
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{
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int i, pvr;
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if (!opb_tag_init_done) {
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pvr = mfpvr() >> 16;
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for (i = 0; opb_limits[i].pvr && opb_limits[i].pvr != pvr; i++)
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;
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if (opb_limits[i].pvr == 0)
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panic("opb_get_bus_space_tag: no limits for this CPU!");
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opb_tag.pbs_base = opb_limits[i].base;
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opb_tag.pbs_limit = opb_limits[i].limit;
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if (bus_space_init(&opb_tag, "opbtag",
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ex_storage, sizeof(ex_storage)))
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panic("opb_attach: Failed to initialise opb_tag");
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opb_tag_init_done = 1;
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}
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return (&opb_tag);
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}
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