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 <sys/param.h>
35 #include <sys/kernel.h>
36 #include <sys/module.h>
38 #include <machine/bus.h>
39 #include <machine/fdt.h>
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>
49 * UART console routines.
51 bus_space_tag_t uart_bus_space_io;
52 bus_space_tag_t uart_bus_space_mem;
55 uart_fdt_get_clock(phandle_t node, pcell_t *cell)
59 if ((OF_getprop(node, "clock-frequency", &clock,
64 /* Try to retrieve parent 'bus-frequency' */
65 /* XXX this should go to simple-bus fixup or so */
66 if ((OF_getprop(OF_parent(node), "bus-frequency", &clock,
70 *cell = fdt32_to_cpu(clock);
75 uart_fdt_get_shift(phandle_t node, pcell_t *cell)
79 if ((OF_getprop(node, "reg-shift", &shift, sizeof(shift))) <= 0)
81 *cell = fdt32_to_cpu(shift);
86 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2)
89 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0);
93 uart_cpu_getdev(int devtype, struct uart_devinfo *di)
96 struct uart_class *class;
97 phandle_t node, chosen;
98 pcell_t shift, br, rclk;
99 u_long start, size, pbase, psize;
102 uart_bus_space_mem = fdtbus_bs_tag;
103 uart_bus_space_io = NULL;
105 /* Allow overriding the FDT uning the environment. */
106 class = &uart_ns8250_class;
107 err = uart_getenv(devtype, di, class);
111 if (devtype != UART_DEV_CONSOLE)
115 * Retrieve /chosen/std{in,out}.
117 if ((chosen = OF_finddevice("/chosen")) == -1)
119 if (OF_getprop(chosen, "stdin", buf, sizeof(buf)) <= 0)
121 if ((node = OF_finddevice(buf)) == -1)
123 if (OF_getprop(chosen, "stdout", buf, sizeof(buf)) <= 0)
125 if (OF_finddevice(buf) != node)
126 /* Only stdin == stdout is supported. */
129 * Retrieve serial attributes.
131 uart_fdt_get_shift(node, &shift);
133 if (OF_getprop(node, "current-speed", &br, sizeof(br)) <= 0)
135 br = fdt32_to_cpu(br);
137 if ((err = uart_fdt_get_clock(node, &rclk)) != 0)
140 * Finalize configuration.
142 if (fdt_is_compatible(node, "fsl,imx-uart"))
143 class = &uart_imx_class;
144 if (fdt_is_compatible(node, "quicc"))
145 class = &uart_quicc_class;
146 if (fdt_is_compatible(node, "lpc"))
147 class = &uart_lpc_class;
148 if (fdt_is_compatible(node, "ns16550"))
149 class = &uart_ns8250_class;
150 if (fdt_is_compatible(node, "arm,pl011"))
151 class = &uart_pl011_class;
152 if (fdt_is_compatible(node, "cadence,uart"))
153 class = &uart_cdnc_class;
156 di->bas.regshft = (u_int)shift;
158 di->bas.rclk = (u_int)rclk;
159 di->ops = uart_getops(class);
162 di->parity = UART_PARITY_NONE;
163 di->bas.bst = uart_bus_space_mem;
165 err = fdt_regsize(node, &start, &size);
168 err = fdt_get_range(OF_parent(node), 0, &pbase, &psize);
174 return (bus_space_map(di->bas.bst, start, size, 0, &di->bas.bsh));