1/*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
| 1/*-
2 * Copyright (c) 2009-2010 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/cdefs.h>
|
31__FBSDID("$FreeBSD: head/sys/dev/uart/uart_bus_fdt.c 249999 2013-04-27 23:07:49Z wkoszek $");
| 31__FBSDID("$FreeBSD: head/sys/dev/uart/uart_bus_fdt.c 250840 2013-05-21 03:05:49Z marcel $");
|
32
33#include <sys/param.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37
38#include <machine/bus.h>
39#include <machine/fdt.h>
40
41#include <dev/fdt/fdt_common.h>
42#include <dev/ofw/ofw_bus.h>
43#include <dev/ofw/ofw_bus_subr.h>
44#include <dev/uart/uart.h>
45#include <dev/uart/uart_bus.h>
46#include <dev/uart/uart_cpu.h>
47
48static int uart_fdt_probe(device_t);
49
50static device_method_t uart_fdt_methods[] = {
51 /* Device interface */
52 DEVMETHOD(device_probe, uart_fdt_probe),
53 DEVMETHOD(device_attach, uart_bus_attach),
54 DEVMETHOD(device_detach, uart_bus_detach),
55 { 0, 0 }
56};
57
58static driver_t uart_fdt_driver = {
59 uart_driver_name,
60 uart_fdt_methods,
61 sizeof(struct uart_softc),
62};
63
64static int
65uart_fdt_get_clock(phandle_t node, pcell_t *cell)
66{
67 pcell_t clock;
68
69 if ((OF_getprop(node, "clock-frequency", &clock,
70 sizeof(clock))) <= 0)
71 return (ENXIO);
72
73 if (clock == 0)
74 /* Try to retrieve parent 'bus-frequency' */
75 /* XXX this should go to simple-bus fixup or so */
76 if ((OF_getprop(OF_parent(node), "bus-frequency", &clock,
77 sizeof(clock))) <= 0)
78 clock = 0;
79
80 *cell = fdt32_to_cpu(clock);
81 return (0);
82}
83
84static int
85uart_fdt_get_shift(phandle_t node, pcell_t *cell)
86{
87 pcell_t shift;
88
89 if ((OF_getprop(node, "reg-shift", &shift, sizeof(shift))) <= 0)
90 shift = 0;
91 *cell = fdt32_to_cpu(shift);
92 return (0);
93}
94
95static int
96uart_fdt_probe(device_t dev)
97{
98 struct uart_softc *sc;
99 phandle_t node;
100 pcell_t clock, shift;
101 int err;
102
103 sc = device_get_softc(dev);
104 if (ofw_bus_is_compatible(dev, "ns16550"))
105 sc->sc_class = &uart_ns8250_class;
106 else if (ofw_bus_is_compatible(dev, "lpc,uart"))
107 sc->sc_class = &uart_lpc_class;
108 else if (ofw_bus_is_compatible(dev, "fsl,imx-uart"))
109 sc->sc_class = &uart_imx_class;
110 else if (ofw_bus_is_compatible(dev, "arm,pl011"))
111 sc->sc_class = &uart_pl011_class;
112 else if (ofw_bus_is_compatible(dev, "cadence,uart"))
113 sc->sc_class = &uart_cdnc_class;
114 else
115 return (ENXIO);
116
117 node = ofw_bus_get_node(dev);
118
119 if ((err = uart_fdt_get_clock(node, &clock)) != 0)
120 return (err);
121 uart_fdt_get_shift(node, &shift);
122
123 return (uart_bus_probe(dev, (int)shift, (int)clock, 0, 0));
124}
125
126DRIVER_MODULE(uart, simplebus, uart_fdt_driver, uart_devclass, 0, 0);
| 32
33#include <sys/param.h>
34#include <sys/bus.h>
35#include <sys/kernel.h>
36#include <sys/module.h>
37
38#include <machine/bus.h>
39#include <machine/fdt.h>
40
41#include <dev/fdt/fdt_common.h>
42#include <dev/ofw/ofw_bus.h>
43#include <dev/ofw/ofw_bus_subr.h>
44#include <dev/uart/uart.h>
45#include <dev/uart/uart_bus.h>
46#include <dev/uart/uart_cpu.h>
47
48static int uart_fdt_probe(device_t);
49
50static device_method_t uart_fdt_methods[] = {
51 /* Device interface */
52 DEVMETHOD(device_probe, uart_fdt_probe),
53 DEVMETHOD(device_attach, uart_bus_attach),
54 DEVMETHOD(device_detach, uart_bus_detach),
55 { 0, 0 }
56};
57
58static driver_t uart_fdt_driver = {
59 uart_driver_name,
60 uart_fdt_methods,
61 sizeof(struct uart_softc),
62};
63
64static int
65uart_fdt_get_clock(phandle_t node, pcell_t *cell)
66{
67 pcell_t clock;
68
69 if ((OF_getprop(node, "clock-frequency", &clock,
70 sizeof(clock))) <= 0)
71 return (ENXIO);
72
73 if (clock == 0)
74 /* Try to retrieve parent 'bus-frequency' */
75 /* XXX this should go to simple-bus fixup or so */
76 if ((OF_getprop(OF_parent(node), "bus-frequency", &clock,
77 sizeof(clock))) <= 0)
78 clock = 0;
79
80 *cell = fdt32_to_cpu(clock);
81 return (0);
82}
83
84static int
85uart_fdt_get_shift(phandle_t node, pcell_t *cell)
86{
87 pcell_t shift;
88
89 if ((OF_getprop(node, "reg-shift", &shift, sizeof(shift))) <= 0)
90 shift = 0;
91 *cell = fdt32_to_cpu(shift);
92 return (0);
93}
94
95static int
96uart_fdt_probe(device_t dev)
97{
98 struct uart_softc *sc;
99 phandle_t node;
100 pcell_t clock, shift;
101 int err;
102
103 sc = device_get_softc(dev);
104 if (ofw_bus_is_compatible(dev, "ns16550"))
105 sc->sc_class = &uart_ns8250_class;
106 else if (ofw_bus_is_compatible(dev, "lpc,uart"))
107 sc->sc_class = &uart_lpc_class;
108 else if (ofw_bus_is_compatible(dev, "fsl,imx-uart"))
109 sc->sc_class = &uart_imx_class;
110 else if (ofw_bus_is_compatible(dev, "arm,pl011"))
111 sc->sc_class = &uart_pl011_class;
112 else if (ofw_bus_is_compatible(dev, "cadence,uart"))
113 sc->sc_class = &uart_cdnc_class;
114 else
115 return (ENXIO);
116
117 node = ofw_bus_get_node(dev);
118
119 if ((err = uart_fdt_get_clock(node, &clock)) != 0)
120 return (err);
121 uart_fdt_get_shift(node, &shift);
122
123 return (uart_bus_probe(dev, (int)shift, (int)clock, 0, 0));
124}
125
126DRIVER_MODULE(uart, simplebus, uart_fdt_driver, uart_devclass, 0, 0);
|
127
128/*
129 * UART console routines.
130 */
131bus_space_tag_t uart_bus_space_io;
132bus_space_tag_t uart_bus_space_mem;
133
134int
135uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
136{
137
138 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
139}
140
141int
142uart_cpu_getdev(int devtype, struct uart_devinfo *di)
143{
144 char buf[64];
145 struct uart_class *class;
146 phandle_t node, chosen;
147 pcell_t shift, br, rclk;
148 u_long start, size, pbase, psize;
149 int err;
150
151 uart_bus_space_mem = fdtbus_bs_tag;
152 uart_bus_space_io = NULL;
153
154 /* Allow overriding the FDT uning the environment. */
155 class = &uart_ns8250_class;
156 err = uart_getenv(devtype, di, class);
157 if (!err)
158 return (0);
159
160 if (devtype != UART_DEV_CONSOLE)
161 return (ENXIO);
162
163 /*
164 * Retrieve /chosen/std{in,out}.
165 */
166 if ((chosen = OF_finddevice("/chosen")) == -1)
167 return (ENXIO);
168 if (OF_getprop(chosen, "stdin", buf, sizeof(buf)) <= 0)
169 return (ENXIO);
170 if ((node = OF_finddevice(buf)) == -1)
171 return (ENXIO);
172 if (OF_getprop(chosen, "stdout", buf, sizeof(buf)) <= 0)
173 return (ENXIO);
174 if (OF_finddevice(buf) != node)
175 /* Only stdin == stdout is supported. */
176 return (ENXIO);
177 /*
178 * Retrieve serial attributes.
179 */
180 uart_fdt_get_shift(node, &shift);
181
182 if (OF_getprop(node, "current-speed", &br, sizeof(br)) <= 0)
183 br = 0;
184 br = fdt32_to_cpu(br);
185
186 if ((err = uart_fdt_get_clock(node, &rclk)) != 0)
187 return (err);
188 /*
189 * Finalize configuration.
190 */
191 if (fdt_is_compatible(node, "fsl,imx-uart"))
192 class = &uart_imx_class;
193 if (fdt_is_compatible(node, "quicc"))
194 class = &uart_quicc_class;
195 if (fdt_is_compatible(node, "lpc"))
196 class = &uart_lpc_class;
197 if (fdt_is_compatible(node, "ns16550"))
198 class = &uart_ns8250_class;
199 if (fdt_is_compatible(node, "arm,pl011"))
200 class = &uart_pl011_class;
201 if (fdt_is_compatible(node, "cadence,uart"))
202 class = &uart_cdnc_class;
203
204 di->bas.chan = 0;
205 di->bas.regshft = (u_int)shift;
206 di->baudrate = br;
207 di->bas.rclk = (u_int)rclk;
208 di->ops = uart_getops(class);
209 di->databits = 8;
210 di->stopbits = 1;
211 di->parity = UART_PARITY_NONE;
212 di->bas.bst = uart_bus_space_mem;
213
214 err = fdt_regsize(node, &start, &size);
215 if (err)
216 return (ENXIO);
217 err = fdt_get_range(OF_parent(node), 0, &pbase, &psize);
218 if (err)
219 pbase = 0;
220
221 start += pbase;
222
223 return (bus_space_map(di->bas.bst, start, size, 0, &di->bas.bsh));
224}
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