NetBSD/sys/dev/ic/cpc700.c
drochner 46289e1fef Phase out the use of a string as first "attach args" member to control
which bustype should be attached with a specific call to config_found()
(from a "mainbus" or a bus bridge).
Do it for isa/eisa/mca and pci/agp for now. These buses all attach to
an mi interface attribute "isabus", "eisabus" etc., and the autoconf
framework now allows to specify an interface attribute on config_found()
and config_search(), which limits the search of matching config data
to these which attach to that specific attribute.
So we basically have to call config_found_ia(..., "foobus", ...) where
such a bus is attached.
As a consequence, where a "mainbus" or alike also attaches other
devices (eg CPUs) which do not attach to a specific attribute yet,
we need at least pass an attribute name (different from "foobus") so
that the foo bus is not found at these places. This made some minor
changes necessary which are not obviously related to the mentioned buses.
2004-08-30 15:05:15 +00:00

281 lines
7.7 KiB
C

/* $NetBSD: cpc700.c,v 1.8 2004/08/30 15:05:19 drochner Exp $ */
/*
* Copyright (c) 2002 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Lennart Augustsson (lennart@augustsson.net) at Sandburst Corp.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 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.
*/
/*
* The IBM CPC700 is a bridge chip for the PowerPC. It contains
* - CPU interface
* - DRAM controller
* - PCI bus master & slave controller
* - interrupt controller
* - timer
* - two UARTs
* - two IIC ports
*
* This driver handles the overall device and enumeration of the
* supported subdevices. NetBSD knows how to handle:
* - PCI master
* - interrupt controller
* - UARTs
* Skeleton drivers are provided for the timer and IIC.
*
* XXX This driver assumes that there is only one instance of it.
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: cpc700.c,v 1.8 2004/08/30 15:05:19 drochner Exp $");
#include "pci.h"
#include "opt_pci.h"
#include <sys/param.h>
#include <sys/extent.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include "locators.h"
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pciconf.h>
#include <dev/ic/cpc700reg.h>
#include <dev/ic/cpc700var.h>
#include <dev/ic/cpc700uic.h>
union attach_args {
struct pcibus_attach_args pba;
struct cpcbus_attach_args cba;
};
void
cpc_attach(struct device *self, pci_chipset_tag_t pc, bus_space_tag_t mem,
bus_space_tag_t pciio, bus_dma_tag_t tag, int attachpci,
uint freq);
static bus_space_tag_t the_cpc_tag;
static bus_space_handle_t the_cpc_handle;
#define INL(a) bus_space_read_stream_4(the_cpc_tag, the_cpc_handle, (a))
#define OUTL(a, d) bus_space_write_stream_4(the_cpc_tag, the_cpc_handle, (a), d)
static int
cpc_print(void *aux, const char *pnp)
{
struct cpcbus_attach_args *caa = aux;
if (pnp)
aprint_normal("%s at %s", caa->cpca_name, pnp);
aprint_normal(" addr 0x%08x", caa->cpca_addr);
if (caa->cpca_irq != CPCBUSCF_IRQ_DEFAULT)
aprint_normal(" irq %d", caa->cpca_irq);
return (UNCONF);
}
static int
cpc_submatch(struct device *parent, struct cfdata *cf,
const locdesc_t *ldesc, void *aux)
{
struct cpcbus_attach_args *caa = aux;
if (cf->cf_loc[CPCBUSCF_ADDR] != caa->cpca_addr)
return (0);
return (config_match(parent, cf, aux));
}
/*
* Attach the cpc.
*/
void
cpc_attach(struct device *self, pci_chipset_tag_t pc, bus_space_tag_t mem,
bus_space_tag_t pciio, bus_dma_tag_t dma, int attachpci,
uint freq)
{
union attach_args aa;
int i;
pcitag_t tag;
pcireg_t erren;
pcireg_t v;
static struct {
const char *name;
bus_addr_t addr;
int irq;
} devs[] = {
{ "com", CPC_COM0, CPC_IB_UART_0 },
{ "com", CPC_COM1, CPC_IB_UART_1 },
{ "cpctim", CPC_TIMER, CPCBUSCF_IRQ_DEFAULT },
{ "cpciic", CPC_IIC0, CPC_IB_IIC_0 },
{ "cpciic", CPC_IIC1, CPC_IB_IIC_1 },
{ NULL, 0 }
};
#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE)
struct extent *ioext, *memext;
#ifdef PCI_CONFIGURE_VERBOSE
extern int pci_conf_debug;
pci_conf_debug = 1;
#endif
#endif
printf(": IBM CPC700\n");
the_cpc_tag = mem;
if (bus_space_map(mem, CPC_UIC_BASE, CPC_UIC_SIZE, 0,
&the_cpc_handle)) {
printf("%s: can't map i/o space\n", self->dv_xname);
return;
}
aa.cba.cpca_tag = mem;
aa.cba.cpca_freq = freq;
for (i = 0; devs[i].name; i++) {
aa.cba.cpca_name = devs[i].name;
aa.cba.cpca_addr = devs[i].addr;
aa.cba.cpca_irq = devs[i].irq;
config_found_sm_loc(self, "cpcbus", NULL, &aa.cba,
cpc_print, cpc_submatch);
}
tag = pci_make_tag(pc, 0, 0, 0);
aa.pba.pba_iot = pciio;
aa.pba.pba_memt = mem;
aa.pba.pba_dmat = dma;
aa.pba.pba_pc = 0;
aa.pba.pba_flags = PCI_FLAGS_MEM_ENABLED | PCI_FLAGS_IO_ENABLED;
aa.pba.pba_bus = 0;
/* Save PCI error condition reg. */
erren = pci_conf_read(pc, tag, CPC_PCI_BRDGERR);
/* Don't generate errors during probe. */
pci_conf_write(pc, tag, CPC_PCI_BRDGERR, 0);
/* Program MITL */
v = pci_conf_read(pc, tag, CPC_BRIDGE_OPTIONS2);
v &= ~(CPC_BRIDGE_O2_ILAT_MASK | CPC_BRIDGE_O2_SLAT_MASK);
v |= (CPC_BRIDGE_O2_ILAT_PRIM_ASYNC << CPC_BRIDGE_O2_ILAT_SHIFT) |
(CPC_BRIDGE_O2_2LAT_PRIM_ASYNC << CPC_BRIDGE_O2_SLAT_SHIFT);
pci_conf_write(pc, tag, CPC_BRIDGE_OPTIONS2, v);
#if NPCI > 0 && defined(PCI_NETBSD_CONFIGURE)
ioext = extent_create("pciio", CPC_PCI_IO_START, CPC_PCI_IO_END,
M_DEVBUF, NULL, 0, EX_NOWAIT);
memext = extent_create("pcimem", CPC_PCI_MEM_BASE, CPC_PCI_MEM_END,
M_DEVBUF, NULL, 0, EX_NOWAIT);
pci_configure_bus(0, ioext, memext, NULL, 0, 32);
extent_destroy(ioext);
extent_destroy(memext);
#endif
config_found_ia(self, "pcibus", &aa.pba, pcibusprint);
/* Restore error triggers, and clear errors */
pci_conf_write(pc, tag, CPC_PCI_BRDGERR, erren | CPC_PCI_CLEARERR);
}
/***************************************************************************/
/*
* Interrupt controller.
*/
void
cpc700_init_intr(bus_space_tag_t bt, bus_space_handle_t bh,
u_int32_t active, u_int32_t level)
{
/* XXX */
the_cpc_tag = bt;
the_cpc_handle = bh;
/*
* See CPC700 manual for information about what
* interrupts have which properties.
*/
OUTL(CPC_UIC_SR, 0xffffffff); /* clear all intrs */
OUTL(CPC_UIC_ER, 0x00000000); /* disable all intrs */
OUTL(CPC_UIC_CR, 0xffffffff); /* gen INT not MCP */
OUTL(CPC_UIC_PR, 0xffff8000 | active); /* 0 = active low */
OUTL(CPC_UIC_TR, 0xc0000000 | level); /* 0 = level intr */
OUTL(CPC_UIC_VR, CPC_UIC_CVR_PRI); /* intr 0 is highest */
}
int
cpc700_read_irq(void)
{
int irq;
u_int32_t irqs;
irqs = INL(CPC_UIC_MSR);
for (irq = 0; irq < ICU_LEN; irq++) {
if (irqs & CPC_INTR_MASK(irq))
return (irq);
}
return (-1);
}
void
cpc700_eoi(int irq)
{
OUTL(CPC_UIC_SR, CPC_INTR_MASK(irq));
}
void
cpc700_disable_irq(int irq)
{
u_int32_t reg;
reg = INL(CPC_UIC_ER);
reg &= ~CPC_INTR_MASK(irq);
OUTL(CPC_UIC_ER, reg);
}
void
cpc700_enable_irq(int irq)
{
u_int32_t reg;
reg = INL(CPC_UIC_ER);
reg |= CPC_INTR_MASK(irq);
OUTL(CPC_UIC_ER, reg);
}