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357 lines
8.8 KiB
C
357 lines
8.8 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2006 Benno Rice. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/bus.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/timetc.h>
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#include <machine/bus.h>
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#include <machine/intr.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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#include <arm/xscale/pxa/pxavar.h>
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#include <arm/xscale/pxa/pxareg.h>
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static MALLOC_DEFINE(M_PXASMI, "PXA SMI",
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"Data for static memory interface devices.");
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struct pxa_smi_softc {
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struct resource *ps_res[1];
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struct rman ps_mem;
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bus_space_tag_t ps_bst;
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bus_addr_t ps_base;
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};
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struct smi_ivars {
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struct resource_list smid_resources;
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bus_addr_t smid_mem;
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};
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static struct resource_spec pxa_smi_spec[] = {
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{ SYS_RES_MEMORY, 0, RF_ACTIVE },
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{ -1, 0 }
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};
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static int pxa_smi_probe(device_t);
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static int pxa_smi_attach(device_t);
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static int pxa_smi_print_child(device_t, device_t);
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static int pxa_smi_read_ivar(device_t, device_t, int, uintptr_t *);
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static struct resource * pxa_smi_alloc_resource(device_t, device_t,
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int, int *, rman_res_t, rman_res_t, rman_res_t, u_int);
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static int pxa_smi_release_resource(device_t, device_t,
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int, int, struct resource *);
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static int pxa_smi_activate_resource(device_t, device_t,
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int, int, struct resource *);
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static void pxa_smi_add_device(device_t, const char *, int);
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static int
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pxa_smi_probe(device_t dev)
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{
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if (resource_disabled("smi", device_get_unit(dev)))
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return (ENXIO);
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device_set_desc(dev, "Static Memory Interface");
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return (0);
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}
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static int
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pxa_smi_attach(device_t dev)
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{
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int error, i, dunit;
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const char *dname;
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struct pxa_smi_softc *sc;
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sc = (struct pxa_smi_softc *)device_get_softc(dev);
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error = bus_alloc_resources(dev, pxa_smi_spec, sc->ps_res);
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if (error) {
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device_printf(dev, "could not allocate resources\n");
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return (ENXIO);
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}
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sc->ps_mem.rm_type = RMAN_ARRAY;
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sc->ps_mem.rm_descr = device_get_nameunit(dev);
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if (rman_init(&sc->ps_mem) != 0)
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panic("pxa_smi_attach: failed to init mem rman");
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if (rman_manage_region(&sc->ps_mem, 0, PXA2X0_CS_SIZE * 6) != 0)
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panic("pxa_smi_attach: failed ot set up mem rman");
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sc->ps_bst = base_tag;
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sc->ps_base = rman_get_start(sc->ps_res[0]);
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i = 0;
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while (resource_find_match(&i, &dname, &dunit, "at",
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device_get_nameunit(dev)) == 0) {
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pxa_smi_add_device(dev, dname, dunit);
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}
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bus_generic_probe(dev);
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bus_generic_attach(dev);
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return (0);
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}
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static int
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pxa_smi_print_child(device_t dev, device_t child)
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{
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struct smi_ivars *smid;
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int retval;
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smid = (struct smi_ivars *)device_get_ivars(child);
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if (smid == NULL) {
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device_printf(dev, "unknown device: %s\n",
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device_get_nameunit(child));
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return (0);
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}
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retval = 0;
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retval += bus_print_child_header(dev, child);
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retval += resource_list_print_type(&smid->smid_resources, "at mem",
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SYS_RES_MEMORY, "%#jx");
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retval += resource_list_print_type(&smid->smid_resources, "irq",
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SYS_RES_IRQ, "%jd");
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retval += bus_print_child_footer(dev, child);
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return (retval);
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}
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static int
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pxa_smi_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
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{
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struct pxa_smi_softc *sc;
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struct smi_ivars *smid;
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sc = device_get_softc(dev);
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smid = device_get_ivars(child);
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switch (which) {
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case SMI_IVAR_PHYSBASE:
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*((bus_addr_t *)result) = smid->smid_mem;
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break;
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default:
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return (ENOENT);
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}
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return (0);
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}
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static struct resource *
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pxa_smi_alloc_resource(device_t dev, device_t child, int type, int *rid,
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rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
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{
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struct pxa_smi_softc *sc;
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struct smi_ivars *smid;
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struct resource *rv;
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struct resource_list *rl;
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struct resource_list_entry *rle;
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int needactivate;
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sc = (struct pxa_smi_softc *)device_get_softc(dev);
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smid = (struct smi_ivars *)device_get_ivars(child);
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rl = &smid->smid_resources;
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if (type == SYS_RES_IOPORT)
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type = SYS_RES_MEMORY;
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rle = resource_list_find(rl, type, *rid);
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if (rle == NULL)
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return (NULL);
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if (rle->res != NULL)
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panic("pxa_smi_alloc_resource: resource is busy");
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needactivate = flags & RF_ACTIVE;
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flags &= ~RF_ACTIVE;
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switch (type) {
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case SYS_RES_MEMORY:
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rv = rman_reserve_resource(&sc->ps_mem, rle->start, rle->end,
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rle->count, flags, child);
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if (rv == NULL)
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return (NULL);
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rle->res = rv;
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rman_set_rid(rv, *rid);
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rman_set_bustag(rv, sc->ps_bst);
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rman_set_bushandle(rv, rle->start);
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv) != 0) {
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rman_release_resource(rv);
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return (NULL);
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}
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}
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break;
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case SYS_RES_IRQ:
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rv = bus_alloc_resource(dev, type, rid, rle->start, rle->end,
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rle->count, flags);
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if (rv == NULL)
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return (NULL);
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if (needactivate) {
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if (bus_activate_resource(child, type, *rid, rv) != 0) {
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bus_release_resource(dev, type, *rid, rv);
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return (NULL);
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}
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}
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break;
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default:
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return (NULL);
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}
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return (rv);
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}
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static int
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pxa_smi_release_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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struct smi_ivars *smid;
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struct resource_list *rl;
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struct resource_list_entry *rle;
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if (type == SYS_RES_IRQ)
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return (bus_release_resource(dev, SYS_RES_IRQ, rid, r));
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smid = (struct smi_ivars *)device_get_ivars(child);
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rl = &smid->smid_resources;
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if (type == SYS_RES_IOPORT)
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type = SYS_RES_MEMORY;
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rle = resource_list_find(rl, type, rid);
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if (rle == NULL)
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panic("pxa_smi_release_resource: can't find resource");
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if (rle->res == NULL)
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panic("pxa_smi_release_resource: resource entry not busy");
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rman_release_resource(rle->res);
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rle->res = NULL;
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return (0);
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}
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static int
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pxa_smi_activate_resource(device_t dev, device_t child, int type, int rid,
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struct resource *r)
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{
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struct pxa_smi_softc *sc;
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sc = (struct pxa_smi_softc *)device_get_softc(dev);
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if (type == SYS_RES_IRQ)
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return (bus_activate_resource(dev, SYS_RES_IRQ, rid, r));
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rman_set_bushandle(r, (bus_space_handle_t)pmap_mapdev(rman_get_start(r),
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rman_get_size(r)));
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return (rman_activate_resource(r));
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}
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static device_method_t pxa_smi_methods[] = {
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DEVMETHOD(device_probe, pxa_smi_probe),
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DEVMETHOD(device_attach, pxa_smi_attach),
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DEVMETHOD(bus_print_child, pxa_smi_print_child),
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DEVMETHOD(bus_read_ivar, pxa_smi_read_ivar),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_alloc_resource, pxa_smi_alloc_resource),
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DEVMETHOD(bus_release_resource, pxa_smi_release_resource),
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DEVMETHOD(bus_activate_resource, pxa_smi_activate_resource),
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{0, 0}
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};
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static driver_t pxa_smi_driver = {
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"smi",
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pxa_smi_methods,
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sizeof(struct pxa_smi_softc),
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};
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static devclass_t pxa_smi_devclass;
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DRIVER_MODULE(smi, pxa, pxa_smi_driver, pxa_smi_devclass, 0, 0);
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static void
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pxa_smi_add_device(device_t dev, const char *name, int unit)
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{
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device_t child;
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int start, count;
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struct smi_ivars *ivars;
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ivars = (struct smi_ivars *)malloc(
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sizeof(struct smi_ivars), M_PXASMI, M_WAITOK);
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child = device_add_child(dev, name, unit);
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if (child == NULL) {
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free(ivars, M_PXASMI);
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return;
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}
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device_set_ivars(child, ivars);
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resource_list_init(&ivars->smid_resources);
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start = 0;
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count = 0;
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resource_int_value(name, unit, "mem", &start);
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resource_int_value(name, unit, "size", &count);
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if (start > 0 || count > 0) {
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resource_list_add(&ivars->smid_resources, SYS_RES_MEMORY, 0,
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start, start + count, count);
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ivars->smid_mem = (bus_addr_t)start;
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}
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start = -1;
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count = 0;
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resource_int_value(name, unit, "irq", &start);
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if (start > -1)
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resource_list_add(&ivars->smid_resources, SYS_RES_IRQ, 0, start,
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start, 1);
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if (resource_disabled(name, unit))
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device_disable(child);
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}
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