Author: gber
Date: Fri May 18 15:25:43 2012
New Revision: 235611
URL: http://svn.freebsd.org/changeset/base/235611
Log:
Add localbus driver for Marvell's platforms.
Obtained from: Semihalf
Supported by: FreeBSD Foundation, Juniper Networks
Added:
head/sys/arm/mv/mv_localbus.c (contents, props changed)
Added: head/sys/arm/mv/mv_localbus.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/mv/mv_localbus.c Fri May 18 15:25:43 2012
(r235611)
@@ -0,0 +1,493 @@
+/*-
+ * Copyright (c) 2012 Semihalf.
+ * 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 "opt_platform.h"
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/ktr.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+#include <sys/bus.h>
+#include <sys/rman.h>
+#include <sys/malloc.h>
+
+#include <machine/fdt.h>
+
+#include <dev/ofw/ofw_bus.h>
+#include <dev/ofw/ofw_bus_subr.h>
+#include <dev/ofw/openfirm.h>
+
+#include "dev/fdt/fdt_common.h"
+#include "ofw_bus_if.h"
+
+#include <arm/mv/mvwin.h>
+
+#define DEBUG
+#undef DEBUG
+
+#ifdef DEBUG
+#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
+ printf(fmt,##args); } while (0)
+#else
+#define debugf(fmt, args...)
+#endif
+
+#define MV_LOCALBUS_MAX_BANKS 8
+#define MV_LOCALBUS_MAX_BANK_CELLS 4
+
+static MALLOC_DEFINE(M_LOCALBUS, "localbus", "localbus devices information");
+
+struct localbus_bank {
+ vm_offset_t va; /* VA of the bank */
+ vm_paddr_t pa; /* physical address of the bank */
+ vm_size_t size; /* bank size */
+ uint8_t mapped; /* device memory has mapping */
+};
+
+struct localbus_softc {
+ device_t sc_dev;
+ bus_space_handle_t sc_bsh;
+ bus_space_tag_t sc_bst;
+ int sc_rid;
+
+ struct localbus_bank *sc_banks;
+};
+
+struct localbus_devinfo {
+ struct ofw_bus_devinfo di_ofw;
+ struct resource_list di_res;
+ int di_bank;
+};
+
+struct localbus_va_entry {
+ int8_t bank;
+ vm_offset_t va;
+ vm_size_t size;
+};
+
+/*
+ * Prototypes.
+ */
+static int localbus_probe(device_t);
+static int localbus_attach(device_t);
+static int localbus_print_child(device_t, device_t);
+
+static struct resource *localbus_alloc_resource(device_t, device_t, int,
+ int *, u_long, u_long, u_long, u_int);
+static struct resource_list *localbus_get_resource_list(device_t, device_t);
+
+static ofw_bus_get_devinfo_t localbus_get_devinfo;
+
+/*
+ * Bus interface definition.
+ */
+static device_method_t localbus_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, localbus_probe),
+ DEVMETHOD(device_attach, localbus_attach),
+ DEVMETHOD(device_detach, bus_generic_detach),
+ DEVMETHOD(device_shutdown, bus_generic_shutdown),
+ DEVMETHOD(device_suspend, bus_generic_suspend),
+ DEVMETHOD(device_resume, bus_generic_resume),
+
+ /* Bus interface */
+ DEVMETHOD(bus_print_child, localbus_print_child),
+ DEVMETHOD(bus_alloc_resource, localbus_alloc_resource),
+ DEVMETHOD(bus_release_resource, bus_generic_release_resource),
+ DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
+ DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
+ DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
+ DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
+ DEVMETHOD(bus_get_resource_list, localbus_get_resource_list),
+
+ /* OFW bus interface */
+ DEVMETHOD(ofw_bus_get_devinfo, localbus_get_devinfo),
+ DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
+ DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
+ DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
+ DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
+ DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
+
+ { 0, 0 }
+};
+
+static driver_t localbus_driver = {
+ "localbus",
+ localbus_methods,
+ sizeof(struct localbus_softc)
+};
+
+const struct localbus_va_entry localbus_virtmap[] = {
+ { 0, MV_DEV_BOOT_BASE, MV_DEV_BOOT_SIZE },
+ { 1, MV_DEV_CS0_BASE, MV_DEV_CS0_SIZE },
+ { 2, MV_DEV_CS1_BASE, MV_DEV_CS1_SIZE },
+ { 3, MV_DEV_CS2_BASE, MV_DEV_CS2_SIZE },
+
+ { -1, 0, 0 }
+};
+
+static struct localbus_bank localbus_banks[MV_LOCALBUS_MAX_BANKS];
+
+devclass_t localbus_devclass;
+
+DRIVER_MODULE(localbus, fdtbus, localbus_driver, localbus_devclass, 0, 0);
+
+static int
+fdt_localbus_reg_decode(phandle_t node, struct localbus_softc *sc,
+ struct localbus_devinfo *di)
+{
+ u_long start, end, count;
+ pcell_t *reg, *regptr;
+ pcell_t addr_cells, size_cells;
+ int tuple_size, tuples;
+ int i, rv, bank;
+
+ if (fdt_addrsize_cells(OF_parent(node), &addr_cells, &size_cells) != 0)
+ return (ENXIO);
+
+ tuple_size = sizeof(pcell_t) * (addr_cells + size_cells);
+ tuples = OF_getprop_alloc(node, "reg", tuple_size, (void **)®);
+ debugf("addr_cells = %d, size_cells = %d\n", addr_cells, size_cells);
+ debugf("tuples = %d, tuple size = %d\n", tuples, tuple_size);
+ if (tuples <= 0)
+ /* No 'reg' property in this node. */
+ return (0);
+
+ regptr = reg;
+ for (i = 0; i < tuples; i++) {
+
+ bank = fdt_data_get((void *)regptr, 1);
+
+ if (bank >= MV_LOCALBUS_MAX_BANKS) {
+ device_printf(sc->sc_dev, "bank number [%d] out of "
+ "range\n", bank);
+ continue;
+ }
+
+ /*
+ * If device doesn't have virtual to physical mapping don't add
+ * resources
+ */
+ if (!(sc->sc_banks[bank].mapped)) {
+ device_printf(sc->sc_dev, "device [%d]: missing memory "
+ "mapping\n", bank);
+ continue;
+ }
+
+ di->di_bank = bank;
+ regptr += 1;
+
+ /* Get address/size. */
+ rv = fdt_data_to_res(regptr, addr_cells - 1, size_cells, &start,
+ &count);
+ if (rv != 0) {
+ resource_list_free(&di->di_res);
+ goto out;
+ }
+
+ /* Check if enough amount of memory is mapped */
+ if (sc->sc_banks[bank].size < count) {
+ device_printf(sc->sc_dev, "device [%d]: not enough "
+ "memory reserved\n", bank);
+ continue;
+ }
+
+ regptr += addr_cells - 1 + size_cells;
+
+ /* Calculate address range relative to VA base. */
+ start = sc->sc_banks[bank].va + start;
+ end = start + count - 1;
+
+ debugf("reg addr bank = %d, start = %lx, end = %lx, "
+ "count = %lx\n", bank, start, end, count);
+
+ /* Use bank (CS) cell as rid. */
+ resource_list_add(&di->di_res, SYS_RES_MEMORY, di->di_bank,
+ start, end, count);
+ }
+ rv = 0;
+out:
+ free(reg, M_OFWPROP);
+ return (rv);
+}
+
+static int
+localbus_probe(device_t dev)
+{
+
+ if (!ofw_bus_is_compatible_strict(dev, "mrvl,lbc"))
+ return (ENXIO);
+
+ device_set_desc(dev, "Marvell device bus");
+
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+localbus_attach(device_t dev)
+{
+ device_t dev_child;
+ struct localbus_softc *sc;
+ struct localbus_devinfo *di;
+ phandle_t dt_node, dt_child;
+
+ sc = device_get_softc(dev);
+ sc->sc_dev = dev;
+ sc->sc_banks = localbus_banks;
+
+ /*
+ * Walk localbus and add direct subordinates as our children.
+ */
+ dt_node = ofw_bus_get_node(dev);
+ for (dt_child = OF_child(dt_node); dt_child != 0;
+ dt_child = OF_peer(dt_child)) {
+
+ /* Check and process 'status' property. */
+ if (!(fdt_is_enabled(dt_child)))
+ continue;
+
+ if (!(fdt_pm_is_enabled(dt_child)))
+ continue;
+
+ di = malloc(sizeof(*di), M_LOCALBUS, M_WAITOK | M_ZERO);
+ if (ofw_bus_gen_setup_devinfo(&di->di_ofw, dt_child) != 0) {
+ free(di, M_LOCALBUS);
+ device_printf(dev, "could not set up devinfo\n");
+ continue;
+ }
+
+ resource_list_init(&di->di_res);
+ if (fdt_localbus_reg_decode(dt_child, sc, di)) {
+ device_printf(dev, "could not process 'reg' "
+ "property\n");
+ ofw_bus_gen_destroy_devinfo(&di->di_ofw);
+ free(di, M_LOCALBUS);
+ continue;
+ }
+
+ /* Add newbus device for this FDT node */
+ dev_child = device_add_child(dev, NULL, -1);
+ if (dev_child == NULL) {
+ device_printf(dev, "could not add child: %s\n",
+ di->di_ofw.obd_name);
+ resource_list_free(&di->di_res);
+ ofw_bus_gen_destroy_devinfo(&di->di_ofw);
+ free(di, M_LOCALBUS);
+ continue;
+ }
+#ifdef DEBUG
+ device_printf(dev, "added child: %s\n\n", di->di_ofw.obd_name);
+#endif
+ device_set_ivars(dev_child, di);
+ }
+
+ return (bus_generic_attach(dev));
+}
+
+static int
+localbus_print_child(device_t dev, device_t child)
+{
+ struct localbus_devinfo *di;
+ struct resource_list *rl;
+ int rv;
+
+ di = device_get_ivars(child);
+ rl = &di->di_res;
+
+ rv = 0;
+ rv += bus_print_child_header(dev, child);
+ rv += resource_list_print_type(rl, "mem", SYS_RES_MEMORY, "%#lx");
+ rv += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%ld");
+ rv += bus_print_child_footer(dev, child);
+
+ return (rv);
+}
+
+static struct resource *
+localbus_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 localbus_devinfo *di;
+ struct resource_list_entry *rle;
+
+ /*
+ * Request for the default allocation with a given rid: use resource
+ * list stored in the local device info.
+ */
+ if ((start == 0UL) && (end == ~0UL)) {
+ if ((di = device_get_ivars(child)) == NULL)
+ return (NULL);
+
+ if (type == SYS_RES_IOPORT)
+ type = SYS_RES_MEMORY;
+
+ rid = &di->di_bank;
+ rle = resource_list_find(&di->di_res, type, *rid);
+ if (rle == NULL) {
+ device_printf(bus, "no default resources for "
+ "rid = %d, type = %d\n", *rid, type);
+ return (NULL);
+ }
+ start = rle->start;
+ end = rle->end;
+ count = rle->count;
+ }
+
+ return (bus_generic_alloc_resource(bus, child, type, rid, start, end,
+ count, flags));
+}
+
+
+static struct resource_list *
+localbus_get_resource_list(device_t bus, device_t child)
+{
+ struct localbus_devinfo *di;
+
+ di = device_get_ivars(child);
+ return (&di->di_res);
+}
+
+static const struct ofw_bus_devinfo *
+localbus_get_devinfo(device_t bus, device_t child)
+{
+ struct localbus_devinfo *di;
+
+ di = device_get_ivars(child);
+ return (&di->di_ofw);
+}
+
+int
+fdt_localbus_devmap(phandle_t dt_node, struct pmap_devmap *fdt_devmap,
+ int banks_max_num, int *banks_added)
+{
+ pcell_t ranges[MV_LOCALBUS_MAX_BANKS * MV_LOCALBUS_MAX_BANK_CELLS];
+ pcell_t *rangesptr;
+ uint32_t tuple_size, bank;
+ vm_paddr_t offset;
+ vm_size_t size;
+ int dev_num, addr_cells, size_cells, par_addr_cells, va_index, i, j, k;
+
+ if ((fdt_addrsize_cells(dt_node, &addr_cells, &size_cells)) != 0)
+ return (EINVAL);
+
+ par_addr_cells = fdt_parent_addr_cells(dt_node);
+ if (par_addr_cells > 2) {
+ /*
+ * Localbus devmap initialization error: unsupported parent
+ * #addr-cells
+ */
+ return (ERANGE);
+ }
+
+ tuple_size = (addr_cells + par_addr_cells + size_cells);
+ if (tuple_size > MV_LOCALBUS_MAX_BANK_CELLS)
+ return (ERANGE);
+
+ tuple_size *= sizeof(pcell_t);
+
+ dev_num = OF_getprop(dt_node, "ranges", ranges, sizeof(ranges));
+ if (dev_num <= 0)
+ return (EINVAL);
+
+ /* Calculate number of devices attached to bus */
+ dev_num = dev_num / tuple_size;
+
+ /*
+ * If number of ranges > max number of localbus devices,
+ * additional entries will not be processed
+ */
+ dev_num = MIN(dev_num, banks_max_num);
+
+ rangesptr = &ranges[0];
+ j = 0;
+
+ /* Process data from FDT */
+ for (i = 0; i < dev_num; i++) {
+
+ /* First field is bank number */
+ bank = fdt_data_get((void *)rangesptr, 1);
+ rangesptr += 1;
+
+ if (bank < 0 || bank > MV_LOCALBUS_MAX_BANKS) {
+ /* Bank out of range */
+ rangesptr += ((addr_cells - 1) + par_addr_cells +
+ size_cells);
+ continue;
+ }
+
+ /* Find virtmap entry for this bank */
+ va_index = -1;
+ for (k = 0; localbus_virtmap[k].bank >= 0; k++) {
+ if (localbus_virtmap[k].bank == bank) {
+ va_index = k;
+ break;
+ }
+ }
+
+ /* Check if virtmap entry was found */
+ if (va_index == -1) {
+ rangesptr += ((addr_cells - 1) + par_addr_cells +
+ size_cells);
+ continue;
+ }
+
+ /* Remaining child's address fields are unused */
+ rangesptr += (addr_cells - 1);
+
+ /* Parent address offset */
+ offset = fdt_data_get((void *)rangesptr, par_addr_cells);
+ rangesptr += par_addr_cells;
+
+ /* Last field is size */
+ size = fdt_data_get((void *)rangesptr, size_cells);
+ rangesptr += size_cells;
+
+ if (size > localbus_virtmap[va_index].size) {
+ /* Not enough space reserved in virtual memory map */
+ continue;
+ }
+
+ fdt_devmap[j].pd_va = localbus_virtmap[va_index].va;
+ fdt_devmap[j].pd_pa = offset;
+ fdt_devmap[j].pd_size = size;
+ fdt_devmap[j].pd_prot = VM_PROT_READ | VM_PROT_WRITE;
+ fdt_devmap[j].pd_cache = PTE_NOCACHE;
+
+ /* Copy data to structure used by localbus driver */
+ localbus_banks[bank].va = fdt_devmap[j].pd_va;
+ localbus_banks[bank].pa = fdt_devmap[j].pd_pa;
+ localbus_banks[bank].size = fdt_devmap[j].pd_size;
+ localbus_banks[bank].mapped = 1;
+
+ j++;
+ }
+
+ *banks_added = j;
+ return (0);
+}
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