freebsd-dev/sys/mips/nlm/xlp_simplebus.c
Jayachandran C. e45f3fe8bd Add subclass of simplebus for Broadcom XLP
This will override the resource allocation of simplebus, and also
merge the resource allocation code which was in xlp_pci.c.

With this change the SoC devices that does not have proper PCI
resources will be on the FDT simplebus. We can remove
sys/mips/nlm/dev/cfi_pci_xlp.c and sys/mips/nlm/dev/uart_pci_xlp.c
2015-02-27 23:33:53 +00:00

324 lines
9.2 KiB
C

/*-
* Copyright (c) 2015 Broadcom Corporation
* (based on sys/dev/fdt/simplebus.c)
* Copyright (c) 2013 Nathan Whitehorn
* 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.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <machine/bus.h>
#include <machine/pmap.h>
#include <machine/intr_machdep.h>
#include <mips/nlm/hal/haldefs.h>
#include <mips/nlm/interrupt.h>
#include <mips/nlm/hal/iomap.h>
#include <mips/nlm/hal/mips-extns.h>
#include <mips/nlm/hal/pcibus.h>
#include <mips/nlm/xlp.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/fdt/simplebus.h>
/* flash memory region for chipselects */
#define GBU_MEM_BASE 0x16000000UL
#define GBU_MEM_LIMIT 0x17ffffffUL
/*
* Device registers in pci ecfg memory region for devices without regular PCI BARs
*/
#define PCI_ECFG_BASE XLP_DEFAULT_IO_BASE
#define PCI_ECFG_LIMIT (XLP_DEFAULT_IO_BASE + 0x0fffffff)
/*
* Bus interface.
*/
static int xlp_simplebus_probe(device_t dev);
static struct resource *xlp_simplebus_alloc_resource(device_t, device_t, int,
int *, u_long, u_long, u_long, u_int);
static int xlp_simplebus_activate_resource(device_t, device_t, int,
int, struct resource *);
static int xlp_simplebus_setup_intr(device_t, device_t,
struct resource *, int, driver_filter_t *, driver_intr_t *, void *, void **);
/*
* ofw_bus interface
*/
static int xlp_simplebus_ofw_map_intr(device_t, device_t, phandle_t,
int, pcell_t *);
static devclass_t simplebus_devclass;
static device_method_t xlp_simplebus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, xlp_simplebus_probe),
DEVMETHOD(bus_alloc_resource, xlp_simplebus_alloc_resource),
DEVMETHOD(bus_activate_resource, xlp_simplebus_activate_resource),
DEVMETHOD(bus_setup_intr, xlp_simplebus_setup_intr),
DEVMETHOD(ofw_bus_map_intr, xlp_simplebus_ofw_map_intr),
DEVMETHOD_END
};
DEFINE_CLASS_1(simplebus, xlp_simplebus_driver, xlp_simplebus_methods,
sizeof(struct simplebus_softc), simplebus_driver);
DRIVER_MODULE(xlp_simplebus, ofwbus, xlp_simplebus_driver, simplebus_devclass,
0, 0);
static struct rman irq_rman, port_rman, mem_rman, pci_ecfg_rman, gbu_rman;
static void
xlp_simplebus_init_resources(void)
{
irq_rman.rm_start = 0;
irq_rman.rm_end = 255;
irq_rman.rm_type = RMAN_ARRAY;
irq_rman.rm_descr = "PCI Mapped Interrupts";
if (rman_init(&irq_rman)
|| rman_manage_region(&irq_rman, 0, 255))
panic("xlp_simplebus_init_resources irq_rman");
port_rman.rm_start = 0;
port_rman.rm_end = ~0ul;
port_rman.rm_type = RMAN_ARRAY;
port_rman.rm_descr = "I/O ports";
if (rman_init(&port_rman)
|| rman_manage_region(&port_rman, PCIE_IO_BASE, PCIE_IO_LIMIT))
panic("xlp_simplebus_init_resources port_rman");
mem_rman.rm_start = 0;
mem_rman.rm_end = ~0ul;
mem_rman.rm_type = RMAN_ARRAY;
mem_rman.rm_descr = "I/O memory";
if (rman_init(&mem_rman)
|| rman_manage_region(&mem_rman, PCIE_MEM_BASE, PCIE_MEM_LIMIT))
panic("xlp_simplebus_init_resources mem_rman");
pci_ecfg_rman.rm_start = 0;
pci_ecfg_rman.rm_end = ~0ul;
pci_ecfg_rman.rm_type = RMAN_ARRAY;
pci_ecfg_rman.rm_descr = "PCI ECFG IO";
if (rman_init(&pci_ecfg_rman) || rman_manage_region(&pci_ecfg_rman,
PCI_ECFG_BASE, PCI_ECFG_LIMIT))
panic("xlp_simplebus_init_resources pci_ecfg_rman");
gbu_rman.rm_start = 0;
gbu_rman.rm_end = ~0ul;
gbu_rman.rm_type = RMAN_ARRAY;
gbu_rman.rm_descr = "Flash region";
if (rman_init(&gbu_rman)
|| rman_manage_region(&gbu_rman, GBU_MEM_BASE, GBU_MEM_LIMIT))
panic("xlp_simplebus_init_resources gbu_rman");
}
static int
xlp_simplebus_probe(device_t dev)
{
if (!ofw_bus_status_okay(dev))
return (ENXIO);
/*
* FDT data puts a "simple-bus" compatible string on many things that
* have children but aren't really busses in our world. Without a
* ranges property we will fail to attach, so just fail to probe too.
*/
if (!(ofw_bus_is_compatible(dev, "simple-bus") &&
ofw_bus_has_prop(dev, "ranges")) &&
(ofw_bus_get_type(dev) == NULL || strcmp(ofw_bus_get_type(dev),
"soc") != 0))
return (ENXIO);
xlp_simplebus_init_resources();
device_set_desc(dev, "XLP SoC bus");
return (BUS_PROBE_SPECIFIC);
}
static struct resource *
xlp_simplebus_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct rman *rm;
struct resource *rv;
struct resource_list_entry *rle;
struct simplebus_softc *sc;
struct simplebus_devinfo *di;
bus_space_tag_t bustag;
int j, isdefault, passthrough, needsactivate;
passthrough = (device_get_parent(child) != bus);
needsactivate = flags & RF_ACTIVE;
sc = device_get_softc(bus);
di = device_get_ivars(child);
rle = NULL;
bustag = NULL;
if (!passthrough) {
isdefault = (start == 0UL && end == ~0UL);
if (isdefault) {
rle = resource_list_find(&di->rl, type, *rid);
if (rle == NULL)
return (NULL);
if (rle->res != NULL)
panic("%s: resource entry is busy", __func__);
start = rle->start;
count = ulmax(count, rle->count);
end = ulmax(rle->end, start + count - 1);
}
if (type == SYS_RES_MEMORY) {
/* Remap through ranges property */
for (j = 0; j < sc->nranges; j++) {
if (start >= sc->ranges[j].bus && end <
sc->ranges[j].bus + sc->ranges[j].size) {
start -= sc->ranges[j].bus;
start += sc->ranges[j].host;
end -= sc->ranges[j].bus;
end += sc->ranges[j].host;
break;
}
}
if (j == sc->nranges && sc->nranges != 0) {
if (bootverbose)
device_printf(bus, "Could not map resource "
"%#lx-%#lx\n", start, end);
return (NULL);
}
}
}
switch (type) {
case SYS_RES_IRQ:
rm = &irq_rman;
break;
case SYS_RES_IOPORT:
rm = &port_rman;
bustag = rmi_bus_space;
break;
case SYS_RES_MEMORY:
if (start >= GBU_MEM_BASE && end <= GBU_MEM_LIMIT) {
rm = &gbu_rman;
bustag = rmi_bus_space;
} else if (start >= PCI_ECFG_BASE && end <= PCI_ECFG_LIMIT) {
rm = &pci_ecfg_rman;
bustag = rmi_uart_bus_space;
} else if (start >= PCIE_MEM_BASE && end <= PCIE_MEM_LIMIT) {
rm = &mem_rman;
bustag = rmi_bus_space;
} else {
if (bootverbose)
device_printf(bus, "Invalid MEM range"
"%#lx-%#lx\n", start, end);
return (NULL);
}
break;
default:
return (NULL);
}
rv = rman_reserve_resource(rm, start, end, count, flags, child);
if (rv == 0) {
device_printf(bus, "%s: could not reserve resource for %s\n",
__func__, device_get_nameunit(child));
return (NULL);
}
rman_set_rid(rv, *rid);
if (bustag != NULL)
rman_set_bustag(rv, bustag);
if (needsactivate) {
if (bus_activate_resource(child, type, *rid, rv)) {
device_printf(bus, "%s: could not activate resource\n",
__func__);
rman_release_resource(rv);
return (NULL);
}
}
return (rv);
}
static int
xlp_simplebus_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *r)
{
void *vaddr;
vm_paddr_t paddr;
vm_size_t psize;
/*
* If this is a memory resource, use pmap_mapdev to map it.
*/
if (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT) {
paddr = rman_get_start(r);
psize = rman_get_size(r);
vaddr = pmap_mapdev(paddr, psize);
rman_set_virtual(r, vaddr);
rman_set_bushandle(r, (bus_space_handle_t)(uintptr_t)vaddr);
}
return (rman_activate_resource(r));
}
static int
xlp_simplebus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
driver_filter_t *filt, driver_intr_t *intr, void *arg, void **cookiep)
{
register_t s;
int irq;
/* setup irq */
s = intr_disable();
irq = rman_get_start(res);
cpu_establish_hardintr(device_get_nameunit(child), filt, intr, arg,
irq, flags, cookiep);
intr_restore(s);
return (0);
}
static int
xlp_simplebus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
pcell_t *irq)
{
return ((int)irq[0]);
}