1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2012 Robert N. M. Watson
5 * All rights reserved.
6 *
7 * This software was developed by SRI International and the University of
8 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
9 * ("CTSRD"), as part of the DARPA CRASH research programme.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD: releng/12.0/sys/dev/altera/jtag_uart/altera_jtag_uart_fdt.c 326255 2017-11-27 14:52:40Z pfg $");
35
36 #include <sys/param.h>
37 #include <sys/bus.h>
38 #include <sys/condvar.h>
39 #include <sys/conf.h>
40 #include <sys/bio.h>
41 #include <sys/kernel.h>
42 #include <sys/lock.h>
43 #include <sys/malloc.h>
44 #include <sys/module.h>
45 #include <sys/mutex.h>
46 #include <sys/rman.h>
47 #include <sys/systm.h>
48 #include <sys/taskqueue.h>
49
50 #include <machine/bus.h>
51 #include <machine/resource.h>
52
53 #include <geom/geom_disk.h>
54
55 #include <dev/altera/jtag_uart/altera_jtag_uart.h>
56
57 #include <dev/fdt/fdt_common.h>
58 #include <dev/ofw/openfirm.h>
59 #include <dev/ofw/ofw_bus.h>
60 #include <dev/ofw/ofw_bus_subr.h>
61
62 /*
63 * FDT bus attachment for Altera JTAG UARTs.
64 */
65 static int
66 altera_jtag_uart_fdt_probe(device_t dev)
67 {
68
69 if (!ofw_bus_status_okay(dev))
70 return (ENXIO);
71
72 if (ofw_bus_is_compatible(dev, "altera,jtag_uart-11_0")) {
73 device_set_desc(dev, "Altera JTAG UART");
74 return (BUS_PROBE_DEFAULT);
75 }
76 return (ENXIO);
77 }
78
79 static int
80 altera_jtag_uart_fdt_attach(device_t dev)
81 {
82 struct altera_jtag_uart_softc *sc;
83 int error;
84
85 error = 0;
86 sc = device_get_softc(dev);
87 sc->ajus_dev = dev;
88 sc->ajus_unit = device_get_unit(dev);
89 sc->ajus_mem_rid = 0;
90 sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
91 &sc->ajus_mem_rid, RF_ACTIVE);
92 if (sc->ajus_mem_res == NULL) {
93 device_printf(dev, "couldn't map memory\n");
94 error = ENXIO;
95 goto out;
96 }
97
98 /*
99 * Interrupt support is optional -- if we can't allocate an IRQ, then
100 * we fall back on polling.
101 */
102 sc->ajus_irq_rid = 0;
103 sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
104 &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE);
105 if (sc->ajus_irq_res == NULL)
106 device_printf(dev,
107 "IRQ unavailable; selecting polled operation\n");
108 error = altera_jtag_uart_attach(sc);
109 out:
110 if (error) {
111 if (sc->ajus_irq_res != NULL)
112 bus_release_resource(dev, SYS_RES_IRQ,
113 sc->ajus_irq_rid, sc->ajus_irq_res);
114 if (sc->ajus_mem_res != NULL)
115 bus_release_resource(dev, SYS_RES_MEMORY,
116 sc->ajus_mem_rid, sc->ajus_mem_res);
117 }
118 return (error);
119 }
120
121 static int
122 altera_jtag_uart_fdt_detach(device_t dev)
123 {
124 struct altera_jtag_uart_softc *sc;
125
126 sc = device_get_softc(dev);
127 KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated",
128 __func__));
129
130 altera_jtag_uart_detach(sc);
131 bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid,
132 sc->ajus_irq_res);
133 bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid,
134 sc->ajus_mem_res);
135 return (0);
136 }
137
138 static device_method_t altera_jtag_uart_fdt_methods[] = {
139 DEVMETHOD(device_probe, altera_jtag_uart_fdt_probe),
140 DEVMETHOD(device_attach, altera_jtag_uart_fdt_attach),
141 DEVMETHOD(device_detach, altera_jtag_uart_fdt_detach),
142 { 0, 0 }
143 };
144
145 static driver_t altera_jtag_uart_fdt_driver = {
146 "altera_jtag_uart",
147 altera_jtag_uart_fdt_methods,
148 sizeof(struct altera_jtag_uart_softc),
149 };
150
151 DRIVER_MODULE(altera_jtag_uart, simplebus, altera_jtag_uart_fdt_driver,
152 altera_jtag_uart_devclass, 0, 0);
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