Author: rwatson
Date: Sun Jan 13 14:38:09 2013
New Revision: 245364
URL: http://svnweb.freebsd.org/changeset/base/245364
Log:
Merge Perforce changeset 219917 to head:
Copy Altera JTAG UART nexus bus attachment as a starting point
for an FDT bus attachment.
Sponsored by: DARPA, AFRL
Added:
head/sys/dev/altera/jtag_uart/altera_jtag_uart_fdt.c
- copied unchanged from r245363,
head/sys/dev/altera/jtag_uart/altera_jtag_uart_nexus.c
Copied: head/sys/dev/altera/jtag_uart/altera_jtag_uart_fdt.c (from r245363,
head/sys/dev/altera/jtag_uart/altera_jtag_uart_nexus.c)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/altera/jtag_uart/altera_jtag_uart_fdt.c Sun Jan 13
14:38:09 2013 (r245364, copy of r245363,
head/sys/dev/altera/jtag_uart/altera_jtag_uart_nexus.c)
@@ -0,0 +1,143 @@
+/*-
+ * Copyright (c) 2012 Robert N. M. Watson
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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/bus.h>
+#include <sys/condvar.h>
+#include <sys/conf.h>
+#include <sys/bio.h>
+#include <sys/kernel.h>
+#include <sys/lock.h>
+#include <sys/malloc.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/rman.h>
+#include <sys/systm.h>
+#include <sys/taskqueue.h>
+
+#include <machine/bus.h>
+#include <machine/resource.h>
+
+#include <geom/geom_disk.h>
+
+#include <dev/altera/jtag_uart/altera_jtag_uart.h>
+
+/*
+ * Nexus bus attachment for Altera JTAG UARTs. Appropriate for most Altera
+ * FPGA SoC-style configurations in which the IP core will be exposed to the
+ * processor via a memory-mapped Avalon bus.
+ */
+static int
+altera_jtag_uart_nexus_probe(device_t dev)
+{
+
+ device_set_desc(dev, "Altera JTAG UART");
+ return (BUS_PROBE_DEFAULT);
+}
+
+static int
+altera_jtag_uart_nexus_attach(device_t dev)
+{
+ struct altera_jtag_uart_softc *sc;
+ int error;
+
+ error = 0;
+ sc = device_get_softc(dev);
+ sc->ajus_dev = dev;
+ sc->ajus_unit = device_get_unit(dev);
+ sc->ajus_mem_rid = 0;
+ sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->ajus_mem_rid, RF_ACTIVE);
+ if (sc->ajus_mem_res == NULL) {
+ device_printf(dev, "couldn't map memory\n");
+ error = ENXIO;
+ goto out;
+ }
+
+ /*
+ * Interrupt support is optional -- if we can't allocate an IRQ, then
+ * we fall back on polling.
+ */
+ sc->ajus_irq_rid = 0;
+ sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
+ &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE);
+ if (sc->ajus_irq_res == NULL)
+ device_printf(dev,
+ "IRQ unavailable; selecting polled operation\n");
+ error = altera_jtag_uart_attach(sc);
+out:
+ if (error) {
+ if (sc->ajus_irq_res != NULL)
+ bus_release_resource(dev, SYS_RES_IRQ,
+ sc->ajus_irq_rid, sc->ajus_irq_res);
+ if (sc->ajus_mem_res != NULL)
+ bus_release_resource(dev, SYS_RES_MEMORY,
+ sc->ajus_mem_rid, sc->ajus_mem_res);
+ }
+ return (error);
+}
+
+static int
+altera_jtag_uart_nexus_detach(device_t dev)
+{
+ struct altera_jtag_uart_softc *sc;
+
+ sc = device_get_softc(dev);
+ KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated",
+ __func__));
+
+ altera_jtag_uart_detach(sc);
+ bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid,
+ sc->ajus_irq_res);
+ bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid,
+ sc->ajus_mem_res);
+ return (0);
+}
+
+static device_method_t altera_jtag_uart_nexus_methods[] = {
+ DEVMETHOD(device_probe, altera_jtag_uart_nexus_probe),
+ DEVMETHOD(device_attach, altera_jtag_uart_nexus_attach),
+ DEVMETHOD(device_detach, altera_jtag_uart_nexus_detach),
+ { 0, 0 }
+};
+
+static driver_t altera_jtag_uart_nexus_driver = {
+ "altera_jtag_uart",
+ altera_jtag_uart_nexus_methods,
+ sizeof(struct altera_jtag_uart_softc),
+};
+
+static devclass_t altera_jtag_uart_devclass;
+
+DRIVER_MODULE(altera_jtag_uart, nexus, altera_jtag_uart_nexus_driver,
+ altera_jtag_uart_devclass, 0, 0);
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