595 lines
15 KiB
C
595 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2012 Oleksandr Tymoshenko <gonzo@freebsd.org>
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* 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/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/sx.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <arm/broadcom/bcm2835/bcm2835_firmware.h>
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#include <arm/broadcom/bcm2835/bcm2835_mbox.h>
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#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h>
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#include <arm/broadcom/bcm2835/bcm2835_vcbus.h>
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#include "mbox_if.h"
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#define REG_READ 0x00
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#define REG_POL 0x10
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#define REG_SENDER 0x14
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#define REG_STATUS 0x18
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#define STATUS_FULL 0x80000000
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#define STATUS_EMPTY 0x40000000
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#define REG_CONFIG 0x1C
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#define CONFIG_DATA_IRQ 0x00000001
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#define REG_WRITE 0x20 /* This is Mailbox 1 address */
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#define MBOX_MSG(chan, data) (((data) & ~0xf) | ((chan) & 0xf))
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#define MBOX_CHAN(msg) ((msg) & 0xf)
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#define MBOX_DATA(msg) ((msg) & ~0xf)
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#define MBOX_LOCK(sc) do { \
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mtx_lock(&(sc)->lock); \
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} while(0)
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#define MBOX_UNLOCK(sc) do { \
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mtx_unlock(&(sc)->lock); \
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} while(0)
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#ifdef DEBUG
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#define dprintf(fmt, args...) printf(fmt, ##args)
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#else
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#define dprintf(fmt, args...)
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#endif
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struct bcm_mbox_softc {
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struct mtx lock;
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struct resource * mem_res;
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struct resource * irq_res;
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void* intr_hl;
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bus_space_tag_t bst;
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bus_space_handle_t bsh;
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int msg[BCM2835_MBOX_CHANS];
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int have_message[BCM2835_MBOX_CHANS];
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struct sx property_chan_lock;
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};
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#define mbox_read_4(sc, reg) \
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bus_space_read_4((sc)->bst, (sc)->bsh, reg)
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#define mbox_write_4(sc, reg, val) \
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bus_space_write_4((sc)->bst, (sc)->bsh, reg, val)
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static struct ofw_compat_data compat_data[] = {
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{"broadcom,bcm2835-mbox", 1},
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{"brcm,bcm2835-mbox", 1},
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{NULL, 0}
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};
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static int
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bcm_mbox_read_msg(struct bcm_mbox_softc *sc, int *ochan)
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{
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#ifdef DEBUG
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uint32_t data;
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#endif
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uint32_t msg;
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int chan;
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msg = mbox_read_4(sc, REG_READ);
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dprintf("bcm_mbox_intr: raw data %08x\n", msg);
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chan = MBOX_CHAN(msg);
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#ifdef DEBUG
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data = MBOX_DATA(msg);
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#endif
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if (sc->msg[chan]) {
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printf("bcm_mbox_intr: channel %d oveflow\n", chan);
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return (1);
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}
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dprintf("bcm_mbox_intr: chan %d, data %08x\n", chan, data);
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sc->msg[chan] = msg;
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if (ochan != NULL)
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*ochan = chan;
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return (0);
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}
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static void
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bcm_mbox_intr(void *arg)
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{
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struct bcm_mbox_softc *sc = arg;
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int chan;
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MBOX_LOCK(sc);
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while (!(mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY))
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if (bcm_mbox_read_msg(sc, &chan) == 0) {
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sc->have_message[chan] = 1;
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wakeup(&sc->have_message[chan]);
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}
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MBOX_UNLOCK(sc);
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}
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static int
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bcm_mbox_probe(device_t dev)
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{
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if (!ofw_bus_status_okay(dev))
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return (ENXIO);
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if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
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return (ENXIO);
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device_set_desc(dev, "BCM2835 VideoCore Mailbox");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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bcm_mbox_attach(device_t dev)
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{
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struct bcm_mbox_softc *sc = device_get_softc(dev);
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int i;
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int rid = 0;
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sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE);
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if (sc->mem_res == NULL) {
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device_printf(dev, "could not allocate memory resource\n");
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return (ENXIO);
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}
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sc->bst = rman_get_bustag(sc->mem_res);
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sc->bsh = rman_get_bushandle(sc->mem_res);
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rid = 0;
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sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, RF_ACTIVE);
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if (sc->irq_res == NULL) {
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device_printf(dev, "could not allocate interrupt resource\n");
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return (ENXIO);
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}
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/* Setup and enable the timer */
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if (bus_setup_intr(dev, sc->irq_res, INTR_MPSAFE | INTR_TYPE_MISC,
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NULL, bcm_mbox_intr, sc, &sc->intr_hl) != 0) {
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bus_release_resource(dev, SYS_RES_IRQ, rid, sc->irq_res);
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device_printf(dev, "Unable to setup the clock irq handler.\n");
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return (ENXIO);
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}
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mtx_init(&sc->lock, "vcio mbox", NULL, MTX_DEF);
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for (i = 0; i < BCM2835_MBOX_CHANS; i++) {
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sc->msg[i] = 0;
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sc->have_message[i] = 0;
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}
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sx_init(&sc->property_chan_lock, "mboxprop");
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/* Read all pending messages */
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while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY) == 0)
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(void)mbox_read_4(sc, REG_READ);
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mbox_write_4(sc, REG_CONFIG, CONFIG_DATA_IRQ);
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return (0);
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}
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/*
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* Mailbox API
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*/
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static int
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bcm_mbox_write(device_t dev, int chan, uint32_t data)
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{
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int limit = 1000;
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struct bcm_mbox_softc *sc = device_get_softc(dev);
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dprintf("bcm_mbox_write: chan %d, data %08x\n", chan, data);
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MBOX_LOCK(sc);
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sc->have_message[chan] = 0;
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while ((mbox_read_4(sc, REG_STATUS) & STATUS_FULL) && --limit)
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DELAY(5);
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if (limit == 0) {
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printf("bcm_mbox_write: STATUS_FULL stuck");
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MBOX_UNLOCK(sc);
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return (EAGAIN);
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}
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mbox_write_4(sc, REG_WRITE, MBOX_MSG(chan, data));
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MBOX_UNLOCK(sc);
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return (0);
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}
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static int
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bcm_mbox_read(device_t dev, int chan, uint32_t *data)
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{
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struct bcm_mbox_softc *sc = device_get_softc(dev);
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int err, read_chan;
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dprintf("bcm_mbox_read: chan %d\n", chan);
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err = 0;
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MBOX_LOCK(sc);
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if (!cold) {
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if (sc->have_message[chan] == 0) {
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if (mtx_sleep(&sc->have_message[chan], &sc->lock, 0,
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"mbox", 10*hz) != 0) {
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device_printf(dev, "timeout waiting for message on chan %d\n", chan);
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err = ETIMEDOUT;
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}
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}
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} else {
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do {
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/* Wait for a message */
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while ((mbox_read_4(sc, REG_STATUS) & STATUS_EMPTY))
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;
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/* Read the message */
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if (bcm_mbox_read_msg(sc, &read_chan) != 0) {
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err = EINVAL;
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goto out;
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}
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} while (read_chan != chan);
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}
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/*
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* get data from intr handler, the same channel is never coming
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* because of holding sc lock.
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*/
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*data = MBOX_DATA(sc->msg[chan]);
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sc->msg[chan] = 0;
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sc->have_message[chan] = 0;
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out:
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MBOX_UNLOCK(sc);
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dprintf("bcm_mbox_read: chan %d, data %08x\n", chan, *data);
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return (err);
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}
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static device_method_t bcm_mbox_methods[] = {
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DEVMETHOD(device_probe, bcm_mbox_probe),
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DEVMETHOD(device_attach, bcm_mbox_attach),
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DEVMETHOD(mbox_read, bcm_mbox_read),
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DEVMETHOD(mbox_write, bcm_mbox_write),
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DEVMETHOD_END
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};
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static driver_t bcm_mbox_driver = {
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"mbox",
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bcm_mbox_methods,
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sizeof(struct bcm_mbox_softc),
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};
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static devclass_t bcm_mbox_devclass;
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EARLY_DRIVER_MODULE(mbox, simplebus, bcm_mbox_driver, bcm_mbox_devclass, 0, 0,
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BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
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static void
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bcm2835_mbox_dma_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
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{
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bus_addr_t *addr;
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if (err)
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return;
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addr = (bus_addr_t *)arg;
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*addr = ARMC_TO_VCBUS(segs[0].ds_addr);
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}
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static void *
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bcm2835_mbox_init_dma(device_t dev, size_t len, bus_dma_tag_t *tag,
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bus_dmamap_t *map, bus_addr_t *phys)
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{
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void *buf;
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int err;
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err = bus_dma_tag_create(bus_get_dma_tag(dev), 16, 0,
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bcm283x_dmabus_peripheral_lowaddr(), BUS_SPACE_MAXADDR, NULL, NULL,
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len, 1, len, 0, NULL, NULL, tag);
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if (err != 0) {
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device_printf(dev, "can't create DMA tag\n");
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return (NULL);
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}
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err = bus_dmamem_alloc(*tag, &buf, 0, map);
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if (err != 0) {
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bus_dma_tag_destroy(*tag);
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device_printf(dev, "can't allocate dmamem\n");
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return (NULL);
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}
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err = bus_dmamap_load(*tag, *map, buf, len, bcm2835_mbox_dma_cb,
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phys, 0);
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if (err != 0) {
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bus_dmamem_free(*tag, buf, *map);
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bus_dma_tag_destroy(*tag);
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device_printf(dev, "can't load DMA map\n");
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return (NULL);
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}
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return (buf);
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}
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static int
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bcm2835_mbox_err(device_t dev, bus_addr_t msg_phys, uint32_t resp_phys,
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struct bcm2835_mbox_hdr *msg, size_t len)
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{
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int idx;
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struct bcm2835_mbox_tag_hdr *tag;
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uint8_t *last;
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if ((uint32_t)msg_phys != resp_phys) {
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device_printf(dev, "response channel mismatch\n");
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return (EIO);
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}
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if (msg->code != BCM2835_MBOX_CODE_RESP_SUCCESS) {
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device_printf(dev, "mbox response error\n");
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return (EIO);
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}
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/* Loop until the end tag. */
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tag = (struct bcm2835_mbox_tag_hdr *)(msg + 1);
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last = (uint8_t *)msg + len;
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for (idx = 0; tag->tag != 0; idx++) {
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/*
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* When setting the GPIO config or state the firmware doesn't
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* set tag->val_len correctly.
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*/
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if ((tag->tag == BCM2835_FIRMWARE_TAG_SET_GPIO_CONFIG ||
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tag->tag == BCM2835_FIRMWARE_TAG_SET_GPIO_STATE) &&
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tag->val_len == 0) {
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tag->val_len = BCM2835_MBOX_TAG_VAL_LEN_RESPONSE |
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tag->val_buf_size;
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}
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if ((tag->val_len & BCM2835_MBOX_TAG_VAL_LEN_RESPONSE) == 0) {
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device_printf(dev, "tag %d response error\n", idx);
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return (EIO);
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}
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/* Clear the response bit. */
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tag->val_len &= ~BCM2835_MBOX_TAG_VAL_LEN_RESPONSE;
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/* Next tag. */
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tag = (struct bcm2835_mbox_tag_hdr *)((uint8_t *)tag +
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sizeof(*tag) + tag->val_buf_size);
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if ((uint8_t *)tag > last) {
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device_printf(dev, "mbox buffer size error\n");
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return (EIO);
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}
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}
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return (0);
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}
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int
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bcm2835_mbox_property(void *msg, size_t msg_size)
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{
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struct bcm_mbox_softc *sc;
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bus_dma_tag_t msg_tag;
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bus_dmamap_t msg_map;
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bus_addr_t msg_phys;
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char *buf;
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uint32_t reg;
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device_t mbox;
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int err;
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/* get mbox device */
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mbox = devclass_get_device(devclass_find("mbox"), 0);
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if (mbox == NULL)
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return (ENXIO);
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sc = device_get_softc(mbox);
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sx_xlock(&sc->property_chan_lock);
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/* Allocate memory for the message */
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buf = bcm2835_mbox_init_dma(mbox, msg_size, &msg_tag, &msg_map,
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&msg_phys);
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if (buf == NULL) {
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err = ENOMEM;
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goto out;
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}
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memcpy(buf, msg, msg_size);
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bus_dmamap_sync(msg_tag, msg_map,
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BUS_DMASYNC_PREWRITE);
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MBOX_WRITE(mbox, BCM2835_MBOX_CHAN_PROP, (uint32_t)msg_phys);
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MBOX_READ(mbox, BCM2835_MBOX_CHAN_PROP, ®);
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bus_dmamap_sync(msg_tag, msg_map,
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BUS_DMASYNC_PREREAD);
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memcpy(msg, buf, msg_size);
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err = bcm2835_mbox_err(mbox, msg_phys, reg,
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(struct bcm2835_mbox_hdr *)msg, msg_size);
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bus_dmamap_unload(msg_tag, msg_map);
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bus_dmamem_free(msg_tag, buf, msg_map);
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bus_dma_tag_destroy(msg_tag);
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out:
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sx_xunlock(&sc->property_chan_lock);
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return (err);
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}
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int
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bcm2835_mbox_set_power_state(uint32_t device_id, boolean_t on)
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{
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struct msg_set_power_state msg;
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int err;
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memset(&msg, 0, sizeof(msg));
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msg.hdr.buf_size = sizeof(msg);
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msg.hdr.code = BCM2835_MBOX_CODE_REQ;
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msg.tag_hdr.tag = BCM2835_MBOX_TAG_SET_POWER_STATE;
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msg.tag_hdr.val_buf_size = sizeof(msg.body);
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msg.tag_hdr.val_len = sizeof(msg.body.req);
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msg.body.req.device_id = device_id;
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msg.body.req.state = (on ? BCM2835_MBOX_POWER_ON : 0) |
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BCM2835_MBOX_POWER_WAIT;
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msg.end_tag = 0;
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err = bcm2835_mbox_property(&msg, sizeof(msg));
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return (err);
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}
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int
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bcm2835_mbox_notify_xhci_reset(uint32_t pci_dev_addr)
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{
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struct msg_notify_xhci_reset msg;
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int err;
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memset(&msg, 0, sizeof(msg));
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msg.hdr.buf_size = sizeof(msg);
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msg.hdr.code = BCM2835_MBOX_CODE_REQ;
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msg.tag_hdr.tag = BCM2835_MBOX_TAG_NOTIFY_XHCI_RESET;
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msg.tag_hdr.val_buf_size = sizeof(msg.body);
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msg.tag_hdr.val_len = sizeof(msg.body.req);
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msg.body.req.pci_device_addr = pci_dev_addr;
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msg.end_tag = 0;
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err = bcm2835_mbox_property(&msg, sizeof(msg));
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return (err);
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}
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int
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bcm2835_mbox_get_clock_rate(uint32_t clock_id, uint32_t *hz)
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{
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struct msg_get_clock_rate msg;
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int err;
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memset(&msg, 0, sizeof(msg));
|
|
msg.hdr.buf_size = sizeof(msg);
|
|
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
|
|
msg.tag_hdr.tag = BCM2835_MBOX_TAG_GET_CLOCK_RATE;
|
|
msg.tag_hdr.val_buf_size = sizeof(msg.body);
|
|
msg.tag_hdr.val_len = sizeof(msg.body.req);
|
|
msg.body.req.clock_id = clock_id;
|
|
msg.end_tag = 0;
|
|
|
|
err = bcm2835_mbox_property(&msg, sizeof(msg));
|
|
*hz = msg.body.resp.rate_hz;
|
|
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
bcm2835_mbox_fb_get_w_h(struct bcm2835_fb_config *fb)
|
|
{
|
|
int err;
|
|
struct msg_fb_get_w_h msg;
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.hdr.buf_size = sizeof(msg);
|
|
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
|
|
BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, GET_PHYSICAL_W_H);
|
|
msg.physical_w_h.tag_hdr.val_len = 0;
|
|
msg.end_tag = 0;
|
|
|
|
err = bcm2835_mbox_property(&msg, sizeof(msg));
|
|
if (err == 0) {
|
|
fb->xres = msg.physical_w_h.body.resp.width;
|
|
fb->yres = msg.physical_w_h.body.resp.height;
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
bcm2835_mbox_fb_get_bpp(struct bcm2835_fb_config *fb)
|
|
{
|
|
int err;
|
|
struct msg_fb_get_bpp msg;
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.hdr.buf_size = sizeof(msg);
|
|
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
|
|
BCM2835_MBOX_INIT_TAG(&msg.bpp, GET_DEPTH);
|
|
msg.bpp.tag_hdr.val_len = 0;
|
|
msg.end_tag = 0;
|
|
|
|
err = bcm2835_mbox_property(&msg, sizeof(msg));
|
|
if (err == 0)
|
|
fb->bpp = msg.bpp.body.resp.bpp;
|
|
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
bcm2835_mbox_fb_init(struct bcm2835_fb_config *fb)
|
|
{
|
|
int err;
|
|
struct msg_fb_setup msg;
|
|
|
|
memset(&msg, 0, sizeof(msg));
|
|
msg.hdr.buf_size = sizeof(msg);
|
|
msg.hdr.code = BCM2835_MBOX_CODE_REQ;
|
|
BCM2835_MBOX_INIT_TAG(&msg.physical_w_h, SET_PHYSICAL_W_H);
|
|
msg.physical_w_h.body.req.width = fb->xres;
|
|
msg.physical_w_h.body.req.height = fb->yres;
|
|
BCM2835_MBOX_INIT_TAG(&msg.virtual_w_h, SET_VIRTUAL_W_H);
|
|
msg.virtual_w_h.body.req.width = fb->vxres;
|
|
msg.virtual_w_h.body.req.height = fb->vyres;
|
|
BCM2835_MBOX_INIT_TAG(&msg.offset, SET_VIRTUAL_OFFSET);
|
|
msg.offset.body.req.x = fb->xoffset;
|
|
msg.offset.body.req.y = fb->yoffset;
|
|
BCM2835_MBOX_INIT_TAG(&msg.depth, SET_DEPTH);
|
|
msg.depth.body.req.bpp = fb->bpp;
|
|
BCM2835_MBOX_INIT_TAG(&msg.alpha, SET_ALPHA_MODE);
|
|
msg.alpha.body.req.alpha = BCM2835_MBOX_ALPHA_MODE_IGNORED;
|
|
BCM2835_MBOX_INIT_TAG(&msg.buffer, ALLOCATE_BUFFER);
|
|
msg.buffer.body.req.alignment = PAGE_SIZE;
|
|
BCM2835_MBOX_INIT_TAG(&msg.pitch, GET_PITCH);
|
|
msg.end_tag = 0;
|
|
|
|
err = bcm2835_mbox_property(&msg, sizeof(msg));
|
|
if (err == 0) {
|
|
fb->xres = msg.physical_w_h.body.resp.width;
|
|
fb->yres = msg.physical_w_h.body.resp.height;
|
|
fb->vxres = msg.virtual_w_h.body.resp.width;
|
|
fb->vyres = msg.virtual_w_h.body.resp.height;
|
|
fb->xoffset = msg.offset.body.resp.x;
|
|
fb->yoffset = msg.offset.body.resp.y;
|
|
fb->pitch = msg.pitch.body.resp.pitch;
|
|
fb->base = VCBUS_TO_ARMC(msg.buffer.body.resp.fb_address);
|
|
fb->size = msg.buffer.body.resp.fb_size;
|
|
}
|
|
|
|
return (err);
|
|
}
|