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zynq7000_uart.c revision 1.1 
      1 /*	$NetBSD: zynq7000_uart.c,v 1.1 2019/06/11 13:01:48 skrll 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 1.1 2019/06/11 13:01:48 skrll 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 char * compatible[] = {
     45 	"xlnx,xuartps",
     46 	"cdns,uart-r1p8",
     47 	NULL
     48 };
     49 
     50 int
     51 zynquart_match(device_t parent, struct cfdata *cf, void *aux)
     52 {
     53 	struct fdt_attach_args * const faa = aux;
     54 
     55 	return of_match_compatible(faa->faa_phandle, compatible);
     56 }
     57 
     58 void
     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_dev(self, "failed to establish interrupt on %s\n", intrstr);
     80 		return;
     81 	}
     82 	aprint_normal_dev(self, "interrupting on %s\n", intrstr);
     83 
     84 	zynquart_attach_common(parent, self, faa->faa_bst, addr, size, 0);
     85 }
     86 
     87 /*
     88  * Console support
     89  */
     90 
     91 static int
     92 zynq_uart_console_match(int phandle)
     93 {
     94 	return of_match_compatible(phandle, compatible);
     95 }
     96 
     97 static void
     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