1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 __FBSDID("$FreeBSD$"); 33 34 #include "opt_platform.h" 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/kernel.h> 39 #include <sys/module.h> 40 #include <sys/systm.h> 41 42 #include <vm/vm.h> 43 #include <vm/pmap.h> 44 45 #include <machine/bus.h> 46 47 #include <dev/fdt/fdt_common.h> 48 #include <dev/ofw/ofw_bus.h> 49 #include <dev/ofw/ofw_bus_subr.h> 50 #include <dev/uart/uart.h> 51 #include <dev/uart/uart_bus.h> 52 #include <dev/uart/uart_cpu.h> 53 #include <dev/uart/uart_cpu_fdt.h> 54 55 /* 56 * UART console routines. 57 */ 58 bus_space_tag_t uart_bus_space_io; 59 bus_space_tag_t uart_bus_space_mem; 60 61 int 62 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 63 { 64 65 if (b1->bst != b2->bst) 66 return (0); 67 if (pmap_kextract(b1->bsh) == 0) 68 return (0); 69 if (pmap_kextract(b2->bsh) == 0) 70 return (0); 71 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 72 } 73 74 int 75 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 76 { 77 struct uart_class *class; 78 bus_space_tag_t bst; 79 bus_space_handle_t bsh; 80 u_int shift, iowidth, rclk; 81 int br, err; 82 83 /* Allow overriding the FDT using the environment. */ 84 class = &uart_ns8250_class; 85 err = uart_getenv(devtype, di, class); 86 if (!err) 87 return (0); 88 89 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, 90 &shift, &iowidth, devtype); 91 if (err != 0) 92 return (err); 93 94 /* 95 * Finalize configuration. 96 */ 97 di->bas.chan = 0; 98 di->bas.regshft = shift; 99 di->bas.regiowidth = iowidth; 100 di->baudrate = br; 101 di->bas.rclk = rclk; 102 di->ops = uart_getops(class); 103 di->databits = 8; 104 di->stopbits = 1; 105 di->parity = UART_PARITY_NONE; 106 di->bas.bst = bst; 107 di->bas.bsh = bsh; 108 109 uart_bus_space_mem = di->bas.bst; 110 uart_bus_space_io = NULL; 111 112 return (err); 113 } 114