2 * Copyright (c) 2009-2010 The FreeBSD Foundation
5 * This software was developed by Semihalf under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include "opt_platform.h"
35 #include <sys/param.h>
37 #include <sys/kernel.h>
38 #include <sys/module.h>
40 #include <machine/bus.h>
42 #include <dev/fdt/fdt_common.h>
43 #include <dev/ofw/ofw_bus.h>
44 #include <dev/ofw/ofw_bus_subr.h>
45 #include <dev/uart/uart.h>
46 #include <dev/uart/uart_bus.h>
47 #include <dev/uart/uart_cpu.h>
49 static int uart_fdt_probe(device_t);
51 static device_method_t uart_fdt_methods[] = {
52 /* Device interface */
53 DEVMETHOD(device_probe, uart_fdt_probe),
54 DEVMETHOD(device_attach, uart_bus_attach),
55 DEVMETHOD(device_detach, uart_bus_detach),
59 static driver_t uart_fdt_driver = {
62 sizeof(struct uart_softc),
66 * Compatible devices. Keep this sorted in most- to least-specific order first,
67 * alphabetical second. That is, "zwie,ns16550" should appear before "ns16550"
68 * on the theory that the zwie driver knows how to make better use of the
69 * hardware than the generic driver. Likewise with chips within a family, the
70 * highest-numbers / most recent models should probably appear earlier.
72 static struct ofw_compat_data compat_data[] = {
73 {"arm,pl011", (uintptr_t)&uart_pl011_class},
74 {"atmel,at91rm9200-usart",(uintptr_t)&at91_usart_class},
75 {"atmel,at91sam9260-usart",(uintptr_t)&at91_usart_class},
76 {"cadence,uart", (uintptr_t)&uart_cdnc_class},
77 {"exynos", (uintptr_t)&uart_s3c2410_class},
78 {"fsl,imx6q-uart", (uintptr_t)&uart_imx_class},
79 {"fsl,imx53-uart", (uintptr_t)&uart_imx_class},
80 {"fsl,imx51-uart", (uintptr_t)&uart_imx_class},
81 {"fsl,imx31-uart", (uintptr_t)&uart_imx_class},
82 {"fsl,imx27-uart", (uintptr_t)&uart_imx_class},
83 {"fsl,imx25-uart", (uintptr_t)&uart_imx_class},
84 {"fsl,imx21-uart", (uintptr_t)&uart_imx_class},
85 {"fsl,mvf600-uart", (uintptr_t)&uart_vybrid_class},
86 {"lpc,uart", (uintptr_t)&uart_lpc_class},
87 {"qcom,msm-uartdm", (uintptr_t)&uart_msm_class},
88 {"ti,ns16550", (uintptr_t)&uart_ti8250_class},
89 {"ns16550", (uintptr_t)&uart_ns8250_class},
90 {NULL, (uintptr_t)NULL},
93 /* Export the compat_data table for use by the uart_cpu_fdt.c probe routine. */
94 const struct ofw_compat_data *uart_fdt_compat_data = compat_data;
97 uart_fdt_get_clock(phandle_t node, pcell_t *cell)
102 * clock-frequency is a FreeBSD-specific hack. Make its presence optional.
104 if ((OF_getprop(node, "clock-frequency", &clock,
105 sizeof(clock))) <= 0)
109 /* Try to retrieve parent 'bus-frequency' */
110 /* XXX this should go to simple-bus fixup or so */
111 if ((OF_getprop(OF_parent(node), "bus-frequency", &clock,
112 sizeof(clock))) <= 0)
115 *cell = fdt32_to_cpu(clock);
120 uart_fdt_get_shift(phandle_t node, pcell_t *cell)
124 if ((OF_getprop(node, "reg-shift", &shift, sizeof(shift))) <= 0)
126 *cell = fdt32_to_cpu(shift);
131 uart_fdt_probe(device_t dev)
133 struct uart_softc *sc;
135 pcell_t clock, shift;
137 const struct ofw_compat_data * cd;
139 sc = device_get_softc(dev);
141 if (!ofw_bus_status_okay(dev))
144 cd = ofw_bus_search_compatible(dev, compat_data);
145 if (cd->ocd_data == (uintptr_t)NULL)
148 sc->sc_class = (struct uart_class *)cd->ocd_data;
150 node = ofw_bus_get_node(dev);
152 if ((err = uart_fdt_get_clock(node, &clock)) != 0)
154 uart_fdt_get_shift(node, &shift);
156 return (uart_bus_probe(dev, (int)shift, (int)clock, 0, 0));
159 DRIVER_MODULE(uart, simplebus, uart_fdt_driver, uart_devclass, 0, 0);
160 DRIVER_MODULE(uart, ofwbus, uart_fdt_driver, uart_devclass, 0, 0);