/* $NetBSD: mcpcia.c,v 1.36 2023/12/04 00:32:10 thorpej Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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, 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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 1.36 2023/12/04 00:32:10 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/kmem.h>
#include <machine/autoconf.h>
#include <machine/rpb.h>
#include <machine/sysarch.h>
#include <alpha/mcbus/mcbusreg.h>
#include <alpha/mcbus/mcbusvar.h>
#include <alpha/pci/mcpciareg.h>
#include <alpha/pci/mcpciavar.h>
#define KV(_addr) ((void *)ALPHA_PHYS_TO_K0SEG((_addr)))
#define MCPCIA_SYSBASE(mc) \
((((unsigned long) (mc)->cc_gid) << MCBUS_GID_SHIFT) | \
(((unsigned long) (mc)->cc_mid) << MCBUS_MID_SHIFT) | \
(MCBUS_IOSPACE))
#define MCPCIA_PROBE(mid, gid) \
badaddr((void *)KV(((((unsigned long) gid) << MCBUS_GID_SHIFT) | \
(((unsigned long) mid) << MCBUS_MID_SHIFT) | \
(MCBUS_IOSPACE) | MCPCIA_PCI_BRIDGE | _MCPCIA_PCI_REV)), \
sizeof(uint32_t))
static int mcpciamatch(device_t, cfdata_t, void *);
static void mcpciaattach(device_t, device_t, void *);
CFATTACH_DECL_NEW(mcpcia, sizeof(struct mcpcia_softc),
mcpciamatch, mcpciaattach, NULL, NULL);
void mcpcia_init0(struct mcpcia_config *);
/*
* We have one statically-allocated mcpcia_config structure; this is
* the one used for the console (which, coincidentally, is the only
* MCPCIA with an EISA adapter attached to it).
*/
struct mcpcia_config mcpcia_console_configuration;
static int mcpcia_bus_get_window(int, int,
struct alpha_bus_space_translation *abst);
static int
mcpciamatch(device_t parent, cfdata_t cf, void *aux)
{
struct mcbus_dev_attach_args *ma = aux;
if (ma->ma_type == MCBUS_TYPE_PCI)
return (1);
return (0);
}
static void
mcpciaattach(device_t parent, device_t self, void *aux)
{
struct mcbus_dev_attach_args *ma = aux;
struct mcpcia_softc *mcp = device_private(self);
struct mcpcia_config *ccp;
struct pcibus_attach_args pba;
uint32_t ctl;
/*
* Make sure this MCPCIA exists...
*/
if (MCPCIA_PROBE(ma->ma_mid, ma->ma_gid)) {
mcp->mcpcia_cc = NULL;
printf(" (not present)\n");
return;
}
printf("\n");
/*
* Determine if we're the console's MCPCIA.
*/
if (ma->ma_mid == mcpcia_console_configuration.cc_mid &&
ma->ma_gid == mcpcia_console_configuration.cc_gid)
ccp = &mcpcia_console_configuration;
else {
ccp = kmem_zalloc(sizeof(struct mcpcia_config), KM_SLEEP);
ccp->cc_mid = ma->ma_mid;
ccp->cc_gid = ma->ma_gid;
}
mcp->mcpcia_dev = self;
mcp->mcpcia_cc = ccp;
ccp->cc_sc = mcp;
/* This initializes cc_sysbase so we can do register access. */
mcpcia_init0(ccp);
ctl = REGVAL(MCPCIA_PCI_REV(ccp));
aprint_normal_dev(self,
"Horse Revision %d, %s Handed Saddle Revision %d,"
" CAP Revision %d\n", HORSE_REV(ctl),
(SADDLE_TYPE(ctl) & 1)? "Right": "Left", SADDLE_REV(ctl),
CAP_REV(ctl));
mcpcia_dma_init(ccp);
/*
* Set up interrupts
*/
alpha_pci_intr_init(ccp, &ccp->cc_iot, &ccp->cc_memt, &ccp->cc_pc);
/*
* Attach PCI bus
*/
pba.pba_iot = &ccp->cc_iot;
pba.pba_memt = &ccp->cc_memt;
pba.pba_dmat = /* start with direct, may change... */
alphabus_dma_get_tag(&ccp->cc_dmat_direct, ALPHA_BUS_PCI);
pba.pba_dmat64 = NULL;
pba.pba_pc = &ccp->cc_pc;
pba.pba_bus = 0;
pba.pba_bridgetag = NULL;
pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
config_found(self, &pba, pcibusprint, CFARGS_NONE);
/*
* Clear any errors that may have occurred during the probe
* sequence.
*/
REGVAL(MCPCIA_CAP_ERR(ccp)) = 0xFFFFFFFF;
alpha_mb();
}
void
mcpcia_init(void)
{
struct mcpcia_config *ccp = &mcpcia_console_configuration;
int i;
/*
* Look for all of the MCPCIAs on the system. One of them
* will have an EISA attached to it. This MCPCIA is the
* only one that can be used for the console. Once we find
* that one, initialize it.
*/
for (i = 0; i < MCPCIA_PER_MCBUS; i++) {
ccp->cc_mid = mcbus_mcpcia_probe_order[i];
/*
* XXX If we ever support more than one MCBUS, we'll
* XXX have to probe for them, and map them to unit
* XXX numbers.
*/
ccp->cc_gid = MCBUS_GID_FROM_INSTANCE(0);
ccp->cc_sysbase = MCPCIA_SYSBASE(ccp);
if (badaddr((void *)ALPHA_PHYS_TO_K0SEG(MCPCIA_PCI_REV(ccp)),
sizeof(uint32_t)))
continue;
if (EISA_PRESENT(REGVAL(MCPCIA_PCI_REV(ccp)))) {
mcpcia_init0(ccp);
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 2;
alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
alpha_bus_get_window = mcpcia_bus_get_window;
return;
}
}
panic("mcpcia_init: unable to find EISA bus");
}
void
mcpcia_init0(struct mcpcia_config *ccp)
{
uint32_t ctl;
if (ccp->cc_initted == 0) {
/* don't do these twice since they set up extents */
mcpcia_bus_io_init(&ccp->cc_iot, ccp);
mcpcia_bus_mem_init(&ccp->cc_memt, ccp);
}
mcpcia_pci_init(&ccp->cc_pc, ccp);
/*
* Establish a precalculated base for convenience's sake.
*/
ccp->cc_sysbase = MCPCIA_SYSBASE(ccp);
/*
* Disable interrupts and clear errors prior to probing
*/
REGVAL(MCPCIA_INT_MASK0(ccp)) = 0;
REGVAL(MCPCIA_INT_MASK1(ccp)) = 0;
REGVAL(MCPCIA_CAP_ERR(ccp)) = 0xFFFFFFFF;
alpha_mb();
if (ccp == &mcpcia_console_configuration) {
/*
* 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(ccp));
mcbus_primary.mcbus_cpu_mid = MCBUS_CPU_MID(ctl);
if ((MCBUS_CPU_INFO(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;
}
#ifdef TEST_PROBE_DEATH
static void
die_heathen_dog(void *arg)
{
struct mcpcia_config *ccp = arg;
/* this causes a fatal machine check (0x670) */
REGVAL(MCPCIA_CAP_DIAG(ccp)) |= CAP_DIAG_MC_ADRPE;
}
#endif
void
mcpcia_config_cleanup(void)
{
volatile uint32_t ctl;
struct mcpcia_softc *mcp;
struct mcpcia_config *ccp;
int i;
extern struct cfdriver mcpcia_cd;
/*
* Turn on Hard, Soft error interrupts. Maybe i2c too.
*/
for (i = 0; i < mcpcia_cd.cd_ndevs; i++) {
if ((mcp = device_lookup_private(&mcpcia_cd, i)) == NULL)
continue;
ccp = mcp->mcpcia_cc;
if (ccp == NULL)
continue;
ctl = REGVAL(MCPCIA_INT_MASK0(ccp));
ctl |= MCPCIA_GEN_IENABL;
REGVAL(MCPCIA_INT_MASK0(ccp)) = ctl;
alpha_mb();
/* force stall while write completes */
ctl = REGVAL(MCPCIA_INT_MASK0(ccp));
}
#ifdef TEST_PROBE_DEATH
(void) timeout (die_heathen_dog, &mcpcia_console_configuration,
30 * hz);
#endif
}
static int
mcpcia_bus_get_window(int type, int window,
struct alpha_bus_space_translation *abst)
{
struct mcpcia_config *ccp = &mcpcia_console_configuration;
bus_space_tag_t st;
switch (type) {
case ALPHA_BUS_TYPE_PCI_IO:
st = &ccp->cc_iot;
break;
case ALPHA_BUS_TYPE_PCI_MEM:
st = &ccp->cc_memt;
break;
default:
panic("mcpcia_bus_get_window");
}
return (alpha_bus_space_get_window(st, window, abst));
}
