1 /* $NetBSD: zynq7000_uart.c,v 1.3 2022/10/25 22:49:39 jmcneill Exp $ */
2
3 /*-
4 * Copyright (c) 2015 Genetec Corporation. All rights reserved.
5 * Written by Hashimoto Kenichi for Genetec Corporation.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: zynq7000_uart.c,v 1.3 2022/10/25 22:49:39 jmcneill Exp $");
31
32 #include "opt_soc.h"
33 #include "opt_console.h"
34
35 #include <sys/param.h>
36 #include <sys/bus.h>
37 #include <sys/device.h>
38
39 #include <arm/xilinx/zynq_uartreg.h>
40 #include <arm/xilinx/zynq_uartvar.h>
41
42 #include <dev/fdt/fdtvar.h>
43
44 static const struct device_compatible_entry compat_data[] = {
45 { .compat = "xlnx,xuartps" },
46 { .compat = "cdns,uart-r1p8" },
47 DEVICE_COMPAT_EOL
48 };
49
50 int
zynquart_match(device_t parent,struct cfdata * cf,void * aux)51 zynquart_match(device_t parent, struct cfdata *cf, void *aux)
52 {
53 struct fdt_attach_args * const faa = aux;
54
55 return of_compatible_match(faa->faa_phandle, compat_data);
56 }
57
58 void
zynquart_attach(device_t parent,device_t self,void * aux)59 zynquart_attach(device_t parent, device_t self, void *aux)
60 {
61 struct fdt_attach_args * faa = aux;
62 const int phandle = faa->faa_phandle;
63 char intrstr[128];
64 bus_addr_t addr;
65 bus_size_t size;
66
67 if (fdtbus_get_reg(phandle, 0, &addr, &size) != 0) {
68 aprint_error(": couldn't get registers\n");
69 return;
70 }
71
72 if (!fdtbus_intr_str(phandle, 0, intrstr, sizeof(intrstr))) {
73 aprint_error(": failed to decode interrupt\n");
74 return;
75 }
76
77 if (fdtbus_intr_establish(phandle, 0, IPL_SERIAL, IST_LEVEL,
78 zynquartintr, device_private(self)) == NULL) {
79 aprint_error(": failed to establish interrupt on %s\n", intrstr);
80 return;
81 }
82
83 zynquart_attach_common(parent, self, faa->faa_bst, addr, size, 0);
84 aprint_normal_dev(self, "interrupting on %s\n", intrstr);
85 }
86
87 /*
88 * Console support
89 */
90
91 static int
zynq_uart_console_match(int phandle)92 zynq_uart_console_match(int phandle)
93 {
94 return of_compatible_match(phandle, compat_data);
95 }
96
97 static void
zynq_uart_console_consinit(struct fdt_attach_args * faa,u_int uart_freq)98 zynq_uart_console_consinit(struct fdt_attach_args *faa, u_int uart_freq)
99 {
100 const int phandle = faa->faa_phandle;
101 bus_space_tag_t bst = faa->faa_bst;
102 bus_addr_t addr;
103 tcflag_t flags;
104 int speed;
105
106 fdtbus_get_reg(phandle, 0, &addr, NULL);
107 speed = fdtbus_get_stdout_speed();
108 if (speed < 0)
109 speed = 115200; /* default */
110 flags = fdtbus_get_stdout_flags();
111
112 if (zynquart_cons_attach(bst, addr, speed, flags))
113 panic("Cannot initialize zynq uart console");
114 }
115
116 static const struct fdt_console zynq_uart_console = {
117 .match = zynq_uart_console_match,
118 .consinit = zynq_uart_console_consinit,
119 };
120
121 FDT_CONSOLE(zynq_uart, &zynq_uart_console);
122