diff options
Diffstat (limited to 'sys/arm/broadcom/bcm2835')
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_firmware.c | 181 | ||||
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_firmware.h | 38 | ||||
| -rw-r--r-- | sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h | 4 | ||||
| -rw-r--r-- | sys/arm/broadcom/bcm2835/files.bcm283x | 1 |
4 files changed, 224 insertions, 0 deletions
diff --git a/sys/arm/broadcom/bcm2835/bcm2835_firmware.c b/sys/arm/broadcom/bcm2835/bcm2835_firmware.c new file mode 100644 index 000000000000..dcc23fe1cd61 --- /dev/null +++ b/sys/arm/broadcom/bcm2835/bcm2835_firmware.c @@ -0,0 +1,181 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2020 Andrew Turner + * + * This work was supported by Innovate UK project 105694, "Digital Security + * by Design (DSbD) Technology Platform Prototype". + * + * 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/bus.h> +#include <sys/kernel.h> +#include <sys/module.h> +#include <sys/sysctl.h> + +#include <dev/ofw/ofw_bus.h> +#include <dev/ofw/ofw_bus_subr.h> + +#include <arm/broadcom/bcm2835/bcm2835_firmware.h> +#include <arm/broadcom/bcm2835/bcm2835_mbox.h> +#include <arm/broadcom/bcm2835/bcm2835_mbox_prop.h> +#include <arm/broadcom/bcm2835/bcm2835_vcbus.h> + +struct bcm2835_firmware_softc { + device_t sc_dev; + phandle_t sc_mbox; +}; + +static struct ofw_compat_data compat_data[] = { + {"raspberrypi,bcm2835-firmware", 1}, + {NULL, 0} +}; + +static int sysctl_bcm2835_firmware_get_revision(SYSCTL_HANDLER_ARGS); + +static int +bcm2835_firmware_probe(device_t dev) +{ + if (!ofw_bus_status_okay(dev)) + return (ENXIO); + + if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0) + return (ENXIO); + + device_set_desc(dev, "BCM2835 Firmware"); + return (BUS_PROBE_DEFAULT); +} + +static int +bcm2835_firmware_attach(device_t dev) +{ + struct bcm2835_firmware_softc *sc; + struct sysctl_ctx_list *ctx; + struct sysctl_oid *tree_node; + struct sysctl_oid_list *tree; + phandle_t node, mbox; + int rv; + + sc = device_get_softc(dev); + sc->sc_dev = dev; + + node = ofw_bus_get_node(dev); + rv = OF_getencprop(node, "mboxes", &mbox, sizeof(mbox)); + if (rv <= 0) { + device_printf(dev, "can't read mboxes property\n"); + return (ENXIO); + } + sc->sc_mbox = mbox; + + OF_device_register_xref(OF_xref_from_node(node), dev); + + ctx = device_get_sysctl_ctx(sc->sc_dev); + tree_node = device_get_sysctl_tree(sc->sc_dev); + tree = SYSCTL_CHILDREN(tree_node); + SYSCTL_ADD_PROC(ctx, tree, OID_AUTO, "revision", + CTLTYPE_UINT | CTLFLAG_RD, sc, sizeof(*sc), + sysctl_bcm2835_firmware_get_revision, "IU", + "Firmware revision"); + return (0); +} + +int +bcm2835_firmware_property(device_t dev, uint32_t prop, void *data, size_t len) +{ + struct { + struct bcm2835_mbox_hdr hdr; + struct bcm2835_mbox_tag_hdr tag_hdr; + uint32_t data[]; + } *msg_hdr; + size_t msg_len; + int err; + + /* + * The message is processed in 32-bit chunks so must be a multiple + * of 32-bits. + */ + if ((len & (sizeof(uint32_t) - 1)) != 0) + return (EINVAL); + + msg_len = sizeof(*msg_hdr) + len + sizeof(uint32_t); + msg_hdr = malloc(sizeof(*msg_hdr) + msg_len + sizeof(uint32_t), + M_DEVBUF, M_WAITOK | M_ZERO); + + msg_hdr->hdr.buf_size = msg_len; + msg_hdr->hdr.code = BCM2835_MBOX_CODE_REQ; + msg_hdr->tag_hdr.tag = prop; + msg_hdr->tag_hdr.val_buf_size = len; + memcpy(msg_hdr->data, data, len); + msg_hdr->data[len / sizeof(uint32_t)] = 0; + + err = bcm2835_mbox_property(msg_hdr, msg_len); + if (err == 0) { + memcpy(data, msg_hdr->data, len); + } + + free(msg_hdr, M_DEVBUF); + + return (err); +} + +static int +sysctl_bcm2835_firmware_get_revision(SYSCTL_HANDLER_ARGS) +{ + struct bcm2835_firmware_softc *sc = arg1; + uint32_t rev; + int err; + + if (bcm2835_firmware_property(sc->sc_dev, + BCM2835_MBOX_TAG_FIRMWARE_REVISION, &rev, sizeof(rev)) != 0) + return (ENXIO); + + err = sysctl_handle_int(oidp, &rev, sizeof(rev), req); + if (err || !req->newptr) /* error || read request */ + return (err); + + /* write request */ + return (EINVAL); +} + +static device_method_t bcm2835_firmware_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, bcm2835_firmware_probe), + DEVMETHOD(device_attach, bcm2835_firmware_attach), + + DEVMETHOD_END +}; + +static devclass_t bcm2835_firmware_devclass; +static driver_t bcm2835_firmware_driver = { + "bcm2835_firmware", + bcm2835_firmware_methods, + sizeof(struct bcm2835_firmware_softc), +}; + +DRIVER_MODULE(bcm2835_firmware, simplebus, bcm2835_firmware_driver, + bcm2835_firmware_devclass, 0, 0); diff --git a/sys/arm/broadcom/bcm2835/bcm2835_firmware.h b/sys/arm/broadcom/bcm2835/bcm2835_firmware.h new file mode 100644 index 000000000000..da6a137083ed --- /dev/null +++ b/sys/arm/broadcom/bcm2835/bcm2835_firmware.h @@ -0,0 +1,38 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause + * + * Copyright (c) 2020 Andrew Turner + * + * This work was supported by Innovate UK project 105694, "Digital Security + * by Design (DSbD) Technology Platform Prototype". + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _BCM2835_FIRMWARE_H_ +#define _BCM2835_FIRMWARE_H_ + +int bcm2835_firmware_property(device_t, uint32_t, void *, size_t); + +#endif diff --git a/sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h b/sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h index c2dfc4975865..211820c09c31 100644 --- a/sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h +++ b/sys/arm/broadcom/bcm2835/bcm2835_mbox_prop.h @@ -58,6 +58,10 @@ struct bcm2835_mbox_tag_hdr { (tag_)->tag_hdr.val_len = sizeof((tag_)->body.req); \ } while (0) +#define BCM2835_MBOX_TAG_FIRMWARE_REVISION 0x00000001 + + + #define BCM2835_MBOX_POWER_ID_EMMC 0x00000000 #define BCM2835_MBOX_POWER_ID_UART0 0x00000001 #define BCM2835_MBOX_POWER_ID_UART1 0x00000002 diff --git a/sys/arm/broadcom/bcm2835/files.bcm283x b/sys/arm/broadcom/bcm2835/files.bcm283x index f367d46a018f..d4faae8e338c 100644 --- a/sys/arm/broadcom/bcm2835/files.bcm283x +++ b/sys/arm/broadcom/bcm2835/files.bcm283x @@ -5,6 +5,7 @@ arm/broadcom/bcm2835/bcm2835_cpufreq.c standard arm/broadcom/bcm2835/bcm2835_dma.c standard arm/broadcom/bcm2835/bcm2835_fb.c optional sc arm/broadcom/bcm2835/bcm2835_fbd.c optional vt +arm/broadcom/bcm2835/bcm2835_firmware.c standard arm/broadcom/bcm2835/bcm2835_ft5406.c optional evdev bcm2835_ft5406 arm/broadcom/bcm2835/bcm2835_gpio.c optional gpio arm/broadcom/bcm2835/bcm2835_intr.c standard |