1 /*- 2 * Copyright (c) 2016 The FreeBSD Foundation 3 * 4 * This software was developed by Andrew Turner under sponsorship from 5 * the FreeBSD Foundation. 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #include "opt_acpi.h" 30 #include "opt_platform.h" 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/kernel.h> 38 #include <sys/module.h> 39 #include <sys/systm.h> 40 41 #include <vm/vm.h> 42 #include <vm/pmap.h> 43 44 #include <machine/bus.h> 45 46 #include <dev/uart/uart.h> 47 #include <dev/uart/uart_bus.h> 48 #include <dev/uart/uart_cpu.h> 49 50 #ifdef DEV_ACPI 51 #include <contrib/dev/acpica/include/acpi.h> 52 #include <contrib/dev/acpica/include/accommon.h> 53 #include <contrib/dev/acpica/include/actables.h> 54 #include <dev/uart/uart_cpu_acpi.h> 55 #endif 56 57 #ifdef FDT 58 #include <dev/fdt/fdt_common.h> 59 #include <dev/ofw/ofw_bus.h> 60 #include <dev/ofw/ofw_bus_subr.h> 61 #include <dev/uart/uart_cpu_fdt.h> 62 #endif 63 64 /* 65 * UART console routines. 66 */ 67 extern struct bus_space memmap_bus; 68 bus_space_tag_t uart_bus_space_io; 69 bus_space_tag_t uart_bus_space_mem = &memmap_bus; 70 71 int 72 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 73 { 74 75 if (pmap_kextract(b1->bsh) == 0) 76 return (0); 77 if (pmap_kextract(b2->bsh) == 0) 78 return (0); 79 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 80 } 81 82 int 83 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 84 { 85 struct uart_class *class; 86 bus_space_handle_t bsh; 87 bus_space_tag_t bst; 88 u_int rclk, shift, iowidth; 89 int br, err; 90 91 /* Allow overriding the FDT using the environment. */ 92 class = &uart_ns8250_class; 93 err = uart_getenv(devtype, di, class); 94 if (err == 0) 95 return (0); 96 97 #ifdef DEV_ACPI 98 /* Check if SPCR can tell us what console to use. */ 99 if (uart_cpu_acpi_spcr(devtype, di) == 0) 100 return (0); 101 #endif 102 err = ENXIO; 103 #ifdef FDT 104 if (err != 0) { 105 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, 106 &shift, &iowidth, devtype); 107 } 108 #endif 109 if (err != 0) 110 return (err); 111 112 /* 113 * Finalize configuration. 114 */ 115 di->bas.chan = 0; 116 di->bas.regshft = shift; 117 di->bas.regiowidth = iowidth; 118 di->baudrate = br; 119 di->bas.rclk = rclk; 120 di->ops = uart_getops(class); 121 di->databits = 8; 122 di->stopbits = 1; 123 di->parity = UART_PARITY_NONE; 124 di->bas.bst = bst; 125 di->bas.bsh = bsh; 126 uart_bus_space_mem = di->bas.bst; 127 uart_bus_space_io = NULL; 128 129 return (0); 130 } 131