1 /*- 2 * Copyright (c) 2016 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Andrew Turner under sponsorship from 6 * the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include "opt_acpi.h" 31 #include "opt_platform.h" 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 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/uart/uart.h> 48 #include <dev/uart/uart_bus.h> 49 #include <dev/uart/uart_cpu.h> 50 51 #ifdef DEV_ACPI 52 #include <contrib/dev/acpica/include/acpi.h> 53 #include <contrib/dev/acpica/include/accommon.h> 54 #include <contrib/dev/acpica/include/actables.h> 55 #include <dev/uart/uart_cpu_acpi.h> 56 #endif 57 58 #ifdef FDT 59 #include <dev/fdt/fdt_common.h> 60 #include <dev/ofw/ofw_bus.h> 61 #include <dev/ofw/ofw_bus_subr.h> 62 #include <dev/uart/uart_cpu_fdt.h> 63 #endif 64 65 /* 66 * UART console routines. 67 */ 68 extern struct bus_space memmap_bus; 69 bus_space_tag_t uart_bus_space_io; 70 bus_space_tag_t uart_bus_space_mem = &memmap_bus; 71 72 int 73 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 74 { 75 76 if (pmap_kextract(b1->bsh) == 0) 77 return (0); 78 if (pmap_kextract(b2->bsh) == 0) 79 return (0); 80 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 81 } 82 83 int 84 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 85 { 86 struct uart_class *class; 87 bus_space_handle_t bsh; 88 bus_space_tag_t bst; 89 u_int rclk, shift, iowidth; 90 int br, err; 91 92 /* Allow overriding the FDT using the environment. */ 93 class = &uart_ns8250_class; 94 err = uart_getenv(devtype, di, class); 95 if (err == 0) 96 return (0); 97 98 #ifdef DEV_ACPI 99 /* Check if SPCR can tell us what console to use. */ 100 if (uart_cpu_acpi_spcr(devtype, di) == 0) 101 return (0); 102 #endif 103 104 if (devtype != UART_DEV_CONSOLE) 105 return (ENXIO); 106 107 err = ENXIO; 108 #ifdef FDT 109 if (err != 0) { 110 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, 111 &shift, &iowidth); 112 } 113 #endif 114 if (err != 0) 115 return (err); 116 117 /* 118 * Finalize configuration. 119 */ 120 di->bas.chan = 0; 121 di->bas.regshft = shift; 122 di->bas.regiowidth = iowidth; 123 di->baudrate = br; 124 di->bas.rclk = rclk; 125 di->ops = uart_getops(class); 126 di->databits = 8; 127 di->stopbits = 1; 128 di->parity = UART_PARITY_NONE; 129 di->bas.bst = bst; 130 di->bas.bsh = bsh; 131 uart_bus_space_mem = di->bas.bst; 132 uart_bus_space_io = NULL; 133 134 return (0); 135 } 136