NetBSD/sys/arch/alpha/pci/mcpcia.c

236 lines
6.4 KiB
C
Raw Normal View History

1998-04-15 04:50:14 +04:00
/* $NetBSD: mcpcia.c,v 1.1 1998/04/15 00:50:14 mjacob Exp $ */
/*
* Copyright (c) 1998 by Matthew Jacob
* NASA AMES Research Center.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice immediately at the beginning of the file, without modification,
* this list of conditions, and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* MCPCIA mcbus to PCI bus adapter
* found on AlphaServer 4100 systems.
*/
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: mcpcia.c,v 1.1 1998/04/15 00:50:14 mjacob Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/pte.h>
#include <alpha/mcbus/mcbusreg.h>
#include <alpha/mcbus/mcbusvar.h>
#include <alpha/pci/mcpciareg.h>
#include <alpha/pci/mcpciavar.h>
#include <alpha/pci/pci_kn300.h>
struct mcpcia_softc *mcpcias = NULL;
static struct mcpcia_softc *mcpcia_lt = NULL;
#define KV(_addr) ((caddr_t)ALPHA_PHYS_TO_K0SEG((_addr)))
#define MCPCIA_SYSBASE(sc) \
((((unsigned long) (sc)->mcpcia_gid) << MCBUS_GID_SHIFT) | \
(((unsigned long) (sc)->mcpcia_mid) << MCBUS_MID_SHIFT) | \
(MCBUS_IOSPACE))
static int mcpciamatch __P((struct device *, struct cfdata *, void *));
static void mcpciaattach __P((struct device *, struct device *, void *));
struct cfattach mcpcia_ca = {
sizeof(struct mcpcia_softc), mcpciamatch, mcpciaattach
};
static int mcpciaprint __P((void *, const char *));
void mcpcia_intr_establish __P((struct confargs *, int (*)(void *), void *));
void mcpcia_intr_disestablish __P((struct confargs *));
caddr_t mcpcia_cvtaddr __P((struct confargs *));
int mcpcia_matchname __P((struct confargs *, char *));
static int
mcpciaprint(aux, pnp)
void *aux;
const char *pnp;
{
register struct pcibus_attach_args *pba = aux;
/* only PCIs can attach to MCPCIA for now */
if (pnp)
printf("%s at %s", pba->pba_busname, pnp);
printf(" bus %d", pba->pba_bus);
return (UNCONF);
}
static int
mcpciamatch(parent, cf, aux)
struct device *parent;
struct cfdata *cf;
void *aux;
{
struct mcbus_dev_attach_args *ma = aux;
if (ma->ma_type == MCBUS_TYPE_PCI)
return (1);
return (0);
}
static void
mcpciaattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
static int first = 1;
struct mcbus_dev_attach_args *ma = aux;
struct mcpcia_softc *mcp = (struct mcpcia_softc *)self;
struct pcibus_attach_args pba;
mcp->mcpcia_dev = *self;
mcp->mcpcia_mid = ma->ma_mid;
mcp->mcpcia_gid = ma->ma_gid;
printf("\n");
mcpcia_init(mcp);
mcp->mcpcia_next = NULL;
if (mcpcia_lt == NULL) {
mcpcias = mcp;
} else {
mcpcia_lt->mcpcia_next = mcp;
}
mcpcia_lt = mcp;
/*
* Set up interrupts
*/
pci_kn300_pickintr(&mcp->mcpcia_cc, first);
#ifdef EVCNT_COUNTERS
if (first == 1) {
evcnt_attach(self, "intr", kn300_intr_evcnt);
first = 0;
}
#else
first = 0;
#endif
/*
* Attach PCI bus
*/
pba.pba_busname = "pci";
pba.pba_iot = &mcp->mcpcia_cc.cc_iot;
pba.pba_memt = &mcp->mcpcia_cc.cc_memt;
pba.pba_dmat = /* start with direct, may change... */
alphabus_dma_get_tag(&mcp->mcpcia_cc.cc_dmat_direct, ALPHA_BUS_PCI);
pba.pba_pc = &mcp->mcpcia_cc.cc_pc;
pba.pba_bus = 0;
pba.pba_flags = PCI_FLAGS_IO_ENABLED | PCI_FLAGS_MEM_ENABLED;
config_found(self, &pba, mcpciaprint);
}
void
mcpcia_init(mcp)
struct mcpcia_softc *mcp;
{
u_int32_t ctl;
struct mcpcia_config *ccp = &mcp->mcpcia_cc;
if (ccp->cc_initted == 0) {
mcpcia_bus_io_init(&ccp->cc_iot, ccp);
mcpcia_bus_mem_init(&ccp->cc_memt, ccp);
}
mcpcia_pci_init(&ccp->cc_pc, ccp);
ccp->cc_sc = mcp;
/*
* Establish a precalculated base for convenience's sake.
*/
ccp->cc_sysbase = MCPCIA_SYSBASE(mcp);
ctl = REGVAL(MCPCIA_PCI_REV(mcp));
printf("%s: Horse Revision %d, %s Handed Saddle Revision %d,"
" CAP Revision %d\n", mcp->mcpcia_dev.dv_xname, HORSE_REV(ctl),
(SADDLE_TYPE(ctl) & 1)? "Right": "Left", SADDLE_REV(ctl),
CAP_REV(ctl));
/*
* Disable interrupts and clear errors prior to probing
*/
REGVAL(MCPCIA_INT_MASK0(mcp)) = 0;
REGVAL(MCPCIA_INT_MASK1(mcp)) = 0;
REGVAL(MCPCIA_CAP_ERR(mcp)) = 0xFFFFFFFF;
alpha_mb();
/*
* Set up DMA stuff for this MCPCIA.
*/
mcpcia_dma_init(ccp);
/*
* Clean up any post probe errors (W1TC).
*/
REGVAL(MCPCIA_CAP_ERR(mcp)) = 0xFFFFFFFF;
alpha_mb();
/*
* Use this opportunity to also find out the MID and CPU
* type of the currently running CPU (that's us, billybob....)
*/
ctl = REGVAL(MCPCIA_WHOAMI(mcp));
mcbus_primary.mcbus_cpu_mid = MCBUS_CPU_MID(ctl);
if ((ctl & CPU_Fill_Err) == 0 && mcbus_primary.mcbus_valid == 0) {
mcbus_primary.mcbus_bcache =
MCBUS_CPU_INFO(ctl) & CPU_BCacheMask;
mcbus_primary.mcbus_valid = 1;
}
alpha_mb();
ccp->cc_initted = 1;
}
void
mcpcia_config_cleanup()
{
volatile u_int32_t ctl;
struct mcpcia_softc *mcp;
/*
* Turn on Hard, Soft error interrupts. Maybe i2c too.
*/
for (mcp = mcpcias; mcp; mcp = mcp->mcpcia_next) {
ctl = REGVAL(MCPCIA_INT_MASK0(mcp));
ctl |= MCPCIA_GEN_IENABL;
REGVAL(MCPCIA_INT_MASK0(mcp)) = ctl;
alpha_mb();
/* force stall while write completes */
ctl = REGVAL(MCPCIA_INT_MASK0(mcp));
}
}