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 44static const struct device_compatible_entry compat_data[] = { 45 { .compat = "xlnx,xuartps" }, 46 { .compat = "cdns,uart-r1p8" }, 47 DEVICE_COMPAT_EOL 48}; 49 50int 51zynquart_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 58void 59zynquart_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 91static int 92zynq_uart_console_match(int phandle) 93{ 94 return of_compatible_match(phandle, compat_data); 95} 96 97static void 98zynq_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 116static const struct fdt_console zynq_uart_console = { 117 .match = zynq_uart_console_match, 118 .consinit = zynq_uart_console_consinit, 119}; 120 121FDT_CONSOLE(zynq_uart, &zynq_uart_console); 122