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Add terasic_de4led, a led(4) driver for the on-board 8-element LED on the
Terasic DE-4 board. Allow LED configuration to be set using loader tunables, not just from userspace, and preconfigure LED 8 as a kernel heartbeat. For now, this is a Nexus-attached, BERI-only driver, but it could be used with other hard and soft cores on Altera FPGAs as well, in principle. Sponsored by: DARPA, AFRL
This commit is contained in:
Robert Watson
parent
8454b1bf68
commit
7b957f4fe7
7 changed files with 387 additions and 0 deletions
188
sys/dev/terasic/de4led/terasic_de4led.c
Normal file
188
sys/dev/terasic/de4led/terasic_de4led.c
Normal file
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@ -0,0 +1,188 @@
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/*-
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* Copyright (c) 2012 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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/bus.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/led/led.h>
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#include <dev/terasic/de4led/terasic_de4led.h>
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static void
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terasic_de4led_update(struct terasic_de4led_softc *sc)
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{
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TERASIC_DE4LED_LOCK_ASSERT(sc);
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bus_write_1(sc->tdl_res, TERASIC_DE4LED_OFF_LED, sc->tdl_bits);
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}
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static void
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led_update(struct terasic_de4led_softc *sc, int bit, int onoff)
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{
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TERASIC_DE4LED_LOCK(sc);
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TERASIC_DE4LED_SETLED(sc, bit, onoff);
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terasic_de4led_update(sc);
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TERASIC_DE4LED_UNLOCK(sc);
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}
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static void
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led_0(void *arg, int onoff)
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{
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led_update(arg, 0, onoff);
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}
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static void
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led_1(void *arg, int onoff)
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{
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led_update(arg, 1, onoff);
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}
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static void
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led_2(void *arg, int onoff)
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{
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led_update(arg, 2, onoff);
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}
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static void
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led_3(void *arg, int onoff)
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{
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led_update(arg, 3, onoff);
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}
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static void
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led_4(void *arg, int onoff)
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{
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led_update(arg, 4, onoff);
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}
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static void
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led_5(void *arg, int onoff)
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{
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led_update(arg, 5, onoff);
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}
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static void
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led_6(void *arg, int onoff)
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{
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led_update(arg, 6, onoff);
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}
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static void
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led_7(void *arg, int onoff)
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{
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led_update(arg, 7, onoff);
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}
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void
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terasic_de4led_attach(struct terasic_de4led_softc *sc)
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{
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const char *cmd;
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TERASIC_DE4LED_LOCK_INIT(sc);
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/*
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* Clear the LED array before we start.
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*/
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TERASIC_DE4LED_LOCK(sc);
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TERASIC_DE4LED_CLEARBAR(sc);
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terasic_de4led_update(sc);
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TERASIC_DE4LED_UNLOCK(sc);
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/*
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* Register the LED array with led(4).
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*/
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sc->tdl_leds[0] = led_create(led_0, sc, "de4led_0");
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sc->tdl_leds[1] = led_create(led_1, sc, "de4led_1");
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sc->tdl_leds[2] = led_create(led_2, sc, "de4led_2");
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sc->tdl_leds[3] = led_create(led_3, sc, "de4led_3");
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sc->tdl_leds[4] = led_create(led_4, sc, "de4led_4");
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sc->tdl_leds[5] = led_create(led_5, sc, "de4led_5");
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sc->tdl_leds[6] = led_create(led_6, sc, "de4led_6");
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sc->tdl_leds[7] = led_create(led_7, sc, "de4led_7");
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_0_cmd", &cmd) == 0)
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led_set("de4led_0", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_1_cmd", &cmd) == 0)
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led_set("de4led_1", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_2_cmd", &cmd) == 0)
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led_set("de4led_2", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_3_cmd", &cmd) == 0)
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led_set("de4led_3", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_4_cmd", &cmd) == 0)
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led_set("de4led_4", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_5_cmd", &cmd) == 0)
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led_set("de4led_5", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_6_cmd", &cmd) == 0)
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led_set("de4led_6", cmd);
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if (resource_string_value(device_get_name(sc->tdl_dev),
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sc->tdl_unit, "de4led_7_cmd", &cmd) == 0)
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led_set("de4led_7", cmd);
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}
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void
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terasic_de4led_detach(struct terasic_de4led_softc *sc)
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{
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int i;
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for (i = 0; i < 8; i++) {
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led_destroy(sc->tdl_leds[i]);
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sc->tdl_leds[i] = NULL;
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}
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TERASIC_DE4LED_LOCK(sc);
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TERASIC_DE4LED_CLEARBAR(sc);
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terasic_de4led_update(sc);
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TERASIC_DE4LED_UNLOCK(sc);
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TERASIC_DE4LED_LOCK_DESTROY(sc);
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}
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75
sys/dev/terasic/de4led/terasic_de4led.h
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75
sys/dev/terasic/de4led/terasic_de4led.h
Normal file
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@ -0,0 +1,75 @@
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/*-
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* Copyright (c) 2012 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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
|
||||
* notice, this list of conditions and the following disclaimer.
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||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* 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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* $FreeBSD$
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*/
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#ifndef _DEV_TERASIC_DE4LED_H_
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#define _DEV_TERASIC_DE4LED_H_
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#define TERASIC_DE4LED_NUMLEDS 8
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struct terasic_de4led_softc {
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device_t tdl_dev;
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int tdl_unit;
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struct resource *tdl_res;
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int tdl_rid;
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struct mtx tdl_lock;
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uint8_t tdl_bits;
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struct cdev *tdl_leds[TERASIC_DE4LED_NUMLEDS];
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};
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#define TERASIC_DE4LED_LOCK(sc) mtx_lock(&(sc)->tdl_lock)
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#define TERASIC_DE4LED_LOCK_ASSERT(sc) mtx_assert(&(sc)->tdl_lock, MA_OWNED)
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#define TERASIC_DE4LED_LOCK_DESTROY(sc) mtx_destroy(&(sc)->tdl_lock)
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#define TERASIC_DE4LED_LOCK_INIT(sc) mtx_init(&(sc)->tdl_lock, \
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"terasic_de4led", NULL, MTX_DEF)
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#define TERASIC_DE4LED_UNLOCK(sc) mtx_unlock(&(sc)->tdl_lock)
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/*
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* Setting and clearing LEDs. tdl_bits is in the bit order preferred for I/O.
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* The LED elements are labelled 1..8 on the DE-4, so bit 0 is LED 1, and so
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* on.
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*/
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#define TERASIC_DE4LED_CLEARBAR(sc) do { \
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(sc)->tdl_bits = 0; \
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} while (0)
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#define TERASIC_DE4LED_SETLED(sc, led, onoff) do { \
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(sc)->tdl_bits &= ~(1 << (led)); \
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(sc)->tdl_bits |= ((onoff != 0) ? 1 : 0) << (led); \
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} while (0)
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/*
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* Only one offset matters for this device -- 0.
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*/
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#define TERASIC_DE4LED_OFF_LED 0
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void terasic_de4led_attach(struct terasic_de4led_softc *sc);
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void terasic_de4led_detach(struct terasic_de4led_softc *sc);
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#endif /* _DEV_TERASIC_DE4LED_H_ */
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112
sys/dev/terasic/de4led/terasic_de4led_nexus.c
Normal file
112
sys/dev/terasic/de4led/terasic_de4led_nexus.c
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@ -0,0 +1,112 @@
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/*-
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* Copyright (c) 2012 Robert N. M. Watson
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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
|
||||
* are met:
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||||
* 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.
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||||
*
|
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* 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
|
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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)
|
||||
* 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/bus.h>
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#include <sys/condvar.h>
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#include <sys/conf.h>
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#include <sys/bio.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/rman.h>
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#include <sys/systm.h>
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#include <machine/bus.h>
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#include <machine/resource.h>
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#include <dev/terasic/de4led/terasic_de4led.h>
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/*
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* Nexus bus attachment for the 8-element LED on the Terasic DE-4 FPGA board,
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* which is hooked up to the processor via a memory-mapped Avalon bus.
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*/
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static int
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terasic_de4led_nexus_probe(device_t dev)
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{
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device_set_desc(dev, "Terasic DE4 8-element LED");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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terasic_de4led_nexus_attach(device_t dev)
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{
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struct terasic_de4led_softc *sc;
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sc = device_get_softc(dev);
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sc->tdl_dev = dev;
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sc->tdl_unit = device_get_unit(dev);
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sc->tdl_rid = 0;
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sc->tdl_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
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&sc->tdl_rid, RF_ACTIVE);
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if (sc->tdl_res == NULL) {
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device_printf(dev, "couldn't map memory\n");
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return (ENXIO);
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}
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terasic_de4led_attach(sc);
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return (0);
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}
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static int
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terasic_de4led_nexus_detach(device_t dev)
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{
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struct terasic_de4led_softc *sc;
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sc = device_get_softc(dev);
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KASSERT(sc->tdl_res != NULL, ("%s: resources not allocated",
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__func__));
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terasic_de4led_detach(sc);
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bus_release_resource(dev, SYS_RES_MEMORY, sc->tdl_rid, sc->tdl_res);
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return (0);
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}
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static device_method_t terasic_de4led_nexus_methods[] = {
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DEVMETHOD(device_probe, terasic_de4led_nexus_probe),
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DEVMETHOD(device_attach, terasic_de4led_nexus_attach),
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DEVMETHOD(device_detach, terasic_de4led_nexus_detach),
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{ 0, 0 }
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};
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static driver_t terasic_de4led_nexus_driver = {
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"terasic_de4led",
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terasic_de4led_nexus_methods,
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sizeof(struct terasic_de4led_softc),
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};
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static devclass_t terasic_de4led_devclass;
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DRIVER_MODULE(terasic_de4led, nexus, terasic_de4led_nexus_driver,
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terasic_de4led_devclass, 0, 0);
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@ -2,6 +2,8 @@
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dev/altera/jtag_uart/altera_jtag_uart_cons.c optional altera_jtag_uart
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dev/altera/jtag_uart/altera_jtag_uart_tty.c optional altera_jtag_uart
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dev/altera/jtag_uart/altera_jtag_uart_nexus.c optional altera_jtag_uart
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dev/terasic/de4led/terasic_de4led.c optional terasic_de4led
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dev/terasic/de4led/terasic_de4led_nexus.c optional terasic_de4led
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dev/terasic/mtl/terasic_mtl.c optional terasic_mtl
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dev/terasic/mtl/terasic_mtl_nexus.c optional terasic_mtl
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dev/terasic/mtl/terasic_mtl_pixel.c optional terasic_mtl
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|
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@ -24,6 +24,14 @@ hint.altera_sdcardc.0.at="nexus0"
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hint.altera_sdcardc.0.maddr=0x7f008000
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hint.altera_sdcardc.0.msize=0x400
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#
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# On-board DE4 8-element LED
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#
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hint.terasic_de4led.0.at="nexus0"
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hint.terasic_de4led.0.maddr=0x7f006000
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hint.terasic_de4led.0.msize=1
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hint.terasic_de4led.0.de4led_0_cmd="f9"
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#
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# Terasic Multi-touch LCD (MTL), an optional feature in DE-4 configurations.
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#
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|
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@ -24,6 +24,7 @@ options ROOTDEVNAME=\"ufs:md0\"
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device altera_avgen
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device altera_jtag_uart
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device altera_sdcard
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device terasic_de4led
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device terasic_mtl
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device isf
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|
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|
|
@ -17,6 +17,7 @@ options ROOTDEVNAME=\"ufs:altera_sdcard0\"
|
|||
device altera_avgen
|
||||
device altera_jtag_uart
|
||||
device altera_sdcard
|
||||
device terasic_de4led
|
||||
device terasic_mtl
|
||||
|
||||
device isf
|
||||
|
|
|
|||
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Reference in a new issue