1 /*-
2 * Copyright (c) 2012 Robert N. M. Watson
3 * All rights reserved.
4 *
5 * This software was developed by SRI International and the University of
6 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
7 * ("CTSRD"), as part of the DARPA CRASH research programme.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31 #include <sys/cdefs.h>
32 __FBSDID("$FreeBSD: releng/10.1/sys/dev/altera/jtag_uart/altera_jtag_uart_fdt.c 266152 2014-05-15 16:11:06Z ian $");
33
34 #include <sys/param.h>
35 #include <sys/bus.h>
36 #include <sys/condvar.h>
37 #include <sys/conf.h>
38 #include <sys/bio.h>
39 #include <sys/kernel.h>
40 #include <sys/lock.h>
41 #include <sys/malloc.h>
42 #include <sys/module.h>
43 #include <sys/mutex.h>
44 #include <sys/rman.h>
45 #include <sys/systm.h>
46 #include <sys/taskqueue.h>
47
48 #include <machine/bus.h>
49 #include <machine/resource.h>
50
51 #include <geom/geom_disk.h>
52
53 #include <dev/altera/jtag_uart/altera_jtag_uart.h>
54
55 #include <dev/fdt/fdt_common.h>
56 #include <dev/ofw/openfirm.h>
57 #include <dev/ofw/ofw_bus.h>
58 #include <dev/ofw/ofw_bus_subr.h>
59
60 /*
61 * FDT bus attachment for Altera JTAG UARTs.
62 */
63 static int
64 altera_jtag_uart_fdt_probe(device_t dev)
65 {
66
67 if (!ofw_bus_status_okay(dev))
68 return (ENXIO);
69
70 if (ofw_bus_is_compatible(dev, "altera,jtag_uart-11_0")) {
71 device_set_desc(dev, "Altera JTAG UART");
72 return (BUS_PROBE_DEFAULT);
73 }
74 return (ENXIO);
75 }
76
77 static int
78 altera_jtag_uart_fdt_attach(device_t dev)
79 {
80 struct altera_jtag_uart_softc *sc;
81 int error;
82
83 error = 0;
84 sc = device_get_softc(dev);
85 sc->ajus_dev = dev;
86 sc->ajus_unit = device_get_unit(dev);
87 sc->ajus_mem_rid = 0;
88 sc->ajus_mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
89 &sc->ajus_mem_rid, RF_ACTIVE);
90 if (sc->ajus_mem_res == NULL) {
91 device_printf(dev, "couldn't map memory\n");
92 error = ENXIO;
93 goto out;
94 }
95
96 /*
97 * Interrupt support is optional -- if we can't allocate an IRQ, then
98 * we fall back on polling.
99 */
100 sc->ajus_irq_rid = 0;
101 sc->ajus_irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
102 &sc->ajus_irq_rid, RF_ACTIVE | RF_SHAREABLE);
103 if (sc->ajus_irq_res == NULL)
104 device_printf(dev,
105 "IRQ unavailable; selecting polled operation\n");
106 error = altera_jtag_uart_attach(sc);
107 out:
108 if (error) {
109 if (sc->ajus_irq_res != NULL)
110 bus_release_resource(dev, SYS_RES_IRQ,
111 sc->ajus_irq_rid, sc->ajus_irq_res);
112 if (sc->ajus_mem_res != NULL)
113 bus_release_resource(dev, SYS_RES_MEMORY,
114 sc->ajus_mem_rid, sc->ajus_mem_res);
115 }
116 return (error);
117 }
118
119 static int
120 altera_jtag_uart_fdt_detach(device_t dev)
121 {
122 struct altera_jtag_uart_softc *sc;
123
124 sc = device_get_softc(dev);
125 KASSERT(sc->ajus_mem_res != NULL, ("%s: resources not allocated",
126 __func__));
127
128 altera_jtag_uart_detach(sc);
129 bus_release_resource(dev, SYS_RES_IRQ, sc->ajus_irq_rid,
130 sc->ajus_irq_res);
131 bus_release_resource(dev, SYS_RES_MEMORY, sc->ajus_mem_rid,
132 sc->ajus_mem_res);
133 return (0);
134 }
135
136 static device_method_t altera_jtag_uart_fdt_methods[] = {
137 DEVMETHOD(device_probe, altera_jtag_uart_fdt_probe),
138 DEVMETHOD(device_attach, altera_jtag_uart_fdt_attach),
139 DEVMETHOD(device_detach, altera_jtag_uart_fdt_detach),
140 { 0, 0 }
141 };
142
143 static driver_t altera_jtag_uart_fdt_driver = {
144 "altera_jtag_uart",
145 altera_jtag_uart_fdt_methods,
146 sizeof(struct altera_jtag_uart_softc),
147 };
148
149 DRIVER_MODULE(altera_jtag_uart, simplebus, altera_jtag_uart_fdt_driver,
150 altera_jtag_uart_devclass, 0, 0);
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