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/* $NetBSD: admpci.c,v 1.1 2007/03/20 08:52:02 dyoung Exp $ */
/*-
* Copyright (c) 2007 David Young. 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, 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 ``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
* 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) 2006 Itronix Inc.
* All rights reserved.
*
* Written by Garrett D'Amore for Itronix Inc.
*
* 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. The name of Itronix Inc. may not be used to endorse
* or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY ITRONIX INC. ``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 ITRONIX INC. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/mips/adm5120/admpci.c 229093 2011-12-31 14:12:12Z hselasky $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/interrupt.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_extern.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/pmap.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcib_private.h>
#include "pcib_if.h"
#include <mips/adm5120/adm5120reg.h>
#ifdef ADMPCI_DEBUG
int admpci_debug = 1;
#define ADMPCI_DPRINTF(__fmt, ...) \
do { \
if (admpci_debug) \
printf((__fmt), __VA_ARGS__); \
} while (/*CONSTCOND*/0)
#else /* !ADMPCI_DEBUG */
#define ADMPCI_DPRINTF(__fmt, ...) do { } while (/*CONSTCOND*/0)
#endif /* ADMPCI_DEBUG */
#define ADMPCI_TAG_BUS_MASK __BITS(23, 16)
/* Bit 11 is reserved. It selects the AHB-PCI bridge. Let device 0
* be the bridge. For all other device numbers, let bit[11] == 0.
*/
#define ADMPCI_TAG_DEVICE_MASK __BITS(15, 11)
#define ADMPCI_TAG_DEVICE_SUBMASK __BITS(15, 12)
#define ADMPCI_TAG_DEVICE_BRIDGE __BIT(11)
#define ADMPCI_TAG_FUNCTION_MASK __BITS(10, 8)
#define ADMPCI_TAG_REGISTER_MASK __BITS(7, 0)
#define ADMPCI_MAX_DEVICE
struct admpci_softc {
device_t sc_dev;
bus_space_tag_t sc_st;
/* Access to PCI config registers */
bus_space_handle_t sc_addrh;
bus_space_handle_t sc_datah;
int sc_busno;
struct rman sc_mem_rman;
struct rman sc_io_rman;
struct rman sc_irq_rman;
uint32_t sc_mem;
uint32_t sc_io;
};
static int
admpci_probe(device_t dev)
{
return (0);
}
static int
admpci_attach(device_t dev)
{
int busno = 0;
struct admpci_softc *sc = device_get_softc(dev);
sc->sc_dev = dev;
sc->sc_busno = busno;
/* Use KSEG1 to access IO ports for it is uncached */
sc->sc_io = MIPS_PHYS_TO_KSEG1(ADM5120_BASE_PCI_IO);
sc->sc_io_rman.rm_type = RMAN_ARRAY;
sc->sc_io_rman.rm_descr = "ADMPCI I/O Ports";
if (rman_init(&sc->sc_io_rman) != 0 ||
rman_manage_region(&sc->sc_io_rman, 0, 0xffff) != 0) {
panic("admpci_attach: failed to set up I/O rman");
}
/* Use KSEG1 to access PCI memory for it is uncached */
sc->sc_mem = MIPS_PHYS_TO_KSEG1(ADM5120_BASE_PCI_MEM);
sc->sc_mem_rman.rm_type = RMAN_ARRAY;
sc->sc_mem_rman.rm_descr = "ADMPCI PCI Memory";
if (rman_init(&sc->sc_mem_rman) != 0 ||
rman_manage_region(&sc->sc_mem_rman,
sc->sc_mem, sc->sc_mem + 0x100000) != 0) {
panic("admpci_attach: failed to set up memory rman");
}
sc->sc_irq_rman.rm_type = RMAN_ARRAY;
sc->sc_irq_rman.rm_descr = "ADMPCI PCI IRQs";
if (rman_init(&sc->sc_irq_rman) != 0 ||
rman_manage_region(&sc->sc_irq_rman, 1, 31) != 0)
panic("admpci_attach: failed to set up IRQ rman");
if (bus_space_map(sc->sc_st, ADM5120_BASE_PCI_CONFADDR, 4, 0,
&sc->sc_addrh) != 0) {
device_printf(sc->sc_dev, "unable to address space\n");
panic("bus_space_map failed");
}
if (bus_space_map(sc->sc_st, ADM5120_BASE_PCI_CONFDATA, 4, 0,
&sc->sc_datah) != 0) {
device_printf(sc->sc_dev, "unable to address space\n");
panic("bus_space_map failed");
}
device_add_child(dev, "pci", busno);
return (bus_generic_attach(dev));
}
static int
admpci_maxslots(device_t dev)
{
return (PCI_SLOTMAX);
}
static uint32_t
admpci_make_addr(int bus, int slot, int func, int reg)
{
return (0x80000000 | (bus << 16) | (slot << 11) | (func << 8) | reg);
}
static uint32_t
admpci_read_config(device_t dev, int bus, int slot, int func, int reg,
int bytes)
{
struct admpci_softc *sc = device_get_softc(dev);
uint32_t data;
uint32_t shift, mask;
bus_addr_t addr;
ADMPCI_DPRINTF("%s: sc %p tag (%x, %x, %x) reg %d\n", __func__,
(void *)sc, bus, slot, func, reg);
addr = admpci_make_addr(bus, slot, func, reg);
ADMPCI_DPRINTF("%s: sc_addrh %p sc_datah %p addr %p\n", __func__,
(void *)sc->sc_addrh, (void *)sc->sc_datah, (void *)addr);
bus_space_write_4(sc->sc_io, sc->sc_addrh, 0, addr);
data = bus_space_read_4(sc->sc_io, sc->sc_datah, 0);
switch (reg % 4) {
case 3:
shift = 24;
break;
case 2:
shift = 16;
break;
case 1:
shift = 8;
break;
default:
shift = 0;
break;
}
switch (bytes) {
case 1:
mask = 0xff;
data = (data >> shift) & mask;
break;
case 2:
mask = 0xffff;
if (reg % 4 == 0)
data = data & mask;
else
data = (data >> 16) & mask;
break;
case 4:
break;
default:
panic("%s: wrong bytes count", __func__);
break;
}
ADMPCI_DPRINTF("%s: read 0x%x\n", __func__, data);
return (data);
}
static void
admpci_write_config(device_t dev, int bus, int slot, int func, int reg,
uint32_t data, int bytes)
{
struct admpci_softc *sc = device_get_softc(dev);
bus_addr_t addr;
uint32_t reg_data;
uint32_t shift, mask;
ADMPCI_DPRINTF("%s: sc %p tag (%x, %x, %x) reg %d\n", __func__,
(void *)sc, bus, slot, func, reg);
if (bytes != 4) {
reg_data = admpci_read_config(dev, bus, slot, func, reg, 4);
switch (reg % 4) {
case 3:
shift = 24;
break;
case 2:
shift = 16;
break;
case 1:
shift = 8;
break;
default:
shift = 0;
break;
}
switch (bytes) {
case 1:
mask = 0xff;
data = (reg_data & ~ (mask << shift)) | (data << shift);
break;
case 2:
mask = 0xffff;
if (reg % 4 == 0)
data = (reg_data & ~mask) | data;
else
data = (reg_data & ~ (mask << shift)) |
(data << shift);
break;
case 4:
break;
default:
panic("%s: wrong bytes count", __func__);
break;
}
}
addr = admpci_make_addr(bus, slot, func, reg);
ADMPCI_DPRINTF("%s: sc_addrh %p sc_datah %p addr %p\n", __func__,
(void *)sc->sc_addrh, (void *)sc->sc_datah, (void *)addr);
bus_space_write_4(sc->sc_io, sc->sc_addrh, 0, addr);
bus_space_write_4(sc->sc_io, sc->sc_datah, 0, data);
}
static int
admpci_route_interrupt(device_t pcib, device_t dev, int pin)
{
/* TODO: implement */
return (0);
}
static int
admpci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct admpci_softc *sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_DOMAIN:
*result = 0;
return (0);
case PCIB_IVAR_BUS:
*result = sc->sc_busno;
return (0);
}
return (ENOENT);
}
static int
admpci_write_ivar(device_t dev, device_t child, int which, uintptr_t result)
{
struct admpci_softc * sc = device_get_softc(dev);
switch (which) {
case PCIB_IVAR_BUS:
sc->sc_busno = result;
return (0);
}
return (ENOENT);
}
static struct resource *
admpci_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
return (NULL);
#if 0
struct admpci_softc *sc = device_get_softc(bus);
struct resource *rv = NULL;
struct rman *rm;
bus_space_handle_t bh = 0;
switch (type) {
case SYS_RES_IRQ:
rm = &sc->sc_irq_rman;
break;
case SYS_RES_MEMORY:
rm = &sc->sc_mem_rman;
bh = sc->sc_mem;
break;
case SYS_RES_IOPORT:
rm = &sc->sc_io_rman;
bh = sc->sc_io;
break;
default:
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == NULL)
return (NULL);
rman_set_rid(rv, *rid);
if (type != SYS_RES_IRQ) {
bh += (rman_get_start(rv));
rman_set_bustag(rv, sc->sc_st);
rman_set_bushandle(rv, bh);
if (flags & RF_ACTIVE) {
if (bus_activate_resource(child, type, *rid, rv)) {
rman_release_resource(rv);
return (NULL);
}
}
}
return (rv);
#endif
}
static int
admpci_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
bus_space_handle_t p;
int error;
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
error = bus_space_map(rman_get_bustag(r),
rman_get_bushandle(r), rman_get_size(r), 0, &p);
if (error)
return (error);
rman_set_bushandle(r, p);
}
return (rman_activate_resource(r));
}
static int
admpci_setup_intr(device_t dev, device_t child, struct resource *ires,
int flags, driver_filter_t *filt, driver_intr_t *handler,
void *arg, void **cookiep)
{
#if 0
struct admpci_softc *sc = device_get_softc(dev);
struct intr_event *event;
int irq, error;
irq = rman_get_start(ires);
if (irq >= ICU_LEN || irq == 2)
panic("%s: bad irq or type", __func__);
event = sc->sc_eventstab[irq];
if (event == NULL) {
error = intr_event_create(&event, (void *)irq, 0,
(void (*)(void *))NULL, "admpci intr%d:", irq);
if (error)
return 0;
sc->sc_eventstab[irq] = event;
}
intr_event_add_handler(event, device_get_nameunit(child), filt,
handler, arg, intr_priority(flags), flags, cookiep);
/* Enable it, set trigger mode. */
sc->sc_imask &= ~(1 << irq);
sc->sc_elcr &= ~(1 << irq);
admpci_set_icus(sc);
#endif
return (0);
}
static int
admpci_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
return (intr_event_remove_handler(cookie));
}
static device_method_t admpci_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, admpci_probe),
DEVMETHOD(device_attach, admpci_attach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, admpci_read_ivar),
DEVMETHOD(bus_write_ivar, admpci_write_ivar),
DEVMETHOD(bus_alloc_resource, admpci_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, admpci_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, admpci_setup_intr),
DEVMETHOD(bus_teardown_intr, admpci_teardown_intr),
/* pcib interface */
DEVMETHOD(pcib_maxslots, admpci_maxslots),
DEVMETHOD(pcib_read_config, admpci_read_config),
DEVMETHOD(pcib_write_config, admpci_write_config),
DEVMETHOD(pcib_route_interrupt, admpci_route_interrupt),
DEVMETHOD_END
};
static driver_t admpci_driver = {
"pcib",
admpci_methods,
sizeof(struct admpci_softc),
};
static devclass_t admpci_devclass;
DRIVER_MODULE(admpci, obio, admpci_driver, admpci_devclass, 0, 0);