1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2009-2010 The FreeBSD Foundation 5 * 6 * This software was developed by Semihalf under sponsorship from 7 * the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #include "opt_platform.h" 33 34 #include <sys/param.h> 35 #include <sys/bus.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/systm.h> 39 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include <machine/bus.h> 44 45 #include <dev/fdt/fdt_common.h> 46 #include <dev/ofw/ofw_bus.h> 47 #include <dev/ofw/ofw_bus_subr.h> 48 #include <dev/uart/uart.h> 49 #include <dev/uart/uart_bus.h> 50 #include <dev/uart/uart_cpu.h> 51 #include <dev/uart/uart_cpu_fdt.h> 52 53 /* 54 * UART console routines. 55 */ 56 bus_space_tag_t uart_bus_space_io; 57 bus_space_tag_t uart_bus_space_mem; 58 59 int 60 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 61 { 62 63 if (b1->bst != b2->bst) 64 return (0); 65 if (pmap_kextract(b1->bsh) == 0) 66 return (0); 67 if (pmap_kextract(b2->bsh) == 0) 68 return (0); 69 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 70 } 71 72 int 73 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 74 { 75 struct uart_class *class; 76 bus_space_tag_t bst; 77 bus_space_handle_t bsh; 78 u_int shift, iowidth, rclk; 79 int br, err; 80 81 /* Allow overriding the FDT using the environment. */ 82 class = &uart_ns8250_class; 83 err = uart_getenv(devtype, di, class); 84 if (err == 0) 85 return (0); 86 87 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, 88 &shift, &iowidth, devtype); 89 if (err != 0) 90 return (err); 91 92 /* 93 * Finalize configuration. 94 */ 95 di->bas.chan = 0; 96 di->bas.regshft = shift; 97 di->bas.regiowidth = iowidth; 98 di->baudrate = br; 99 di->bas.rclk = rclk; 100 di->ops = uart_getops(class); 101 di->databits = 8; 102 di->stopbits = 1; 103 di->parity = UART_PARITY_NONE; 104 di->bas.bst = bst; 105 di->bas.bsh = bsh; 106 107 uart_bus_space_mem = di->bas.bst; 108 uart_bus_space_io = NULL; 109 110 return (err); 111 } 112