1 /*- 2 * Copyright (c) 2009-2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Semihalf 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 <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 #include "opt_platform.h" 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/fdt/fdt_common.h> 47 #include <dev/ofw/ofw_bus.h> 48 #include <dev/ofw/ofw_bus_subr.h> 49 #include <dev/uart/uart.h> 50 #include <dev/uart/uart_bus.h> 51 #include <dev/uart/uart_cpu.h> 52 #include <dev/uart/uart_cpu_fdt.h> 53 54 /* 55 * UART console routines. 56 */ 57 bus_space_tag_t uart_bus_space_io; 58 bus_space_tag_t uart_bus_space_mem; 59 60 int 61 uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 62 { 63 64 if (b1->bst != b2->bst) 65 return (0); 66 if (pmap_kextract(b1->bsh) == 0) 67 return (0); 68 if (pmap_kextract(b2->bsh) == 0) 69 return (0); 70 return ((pmap_kextract(b1->bsh) == pmap_kextract(b2->bsh)) ? 1 : 0); 71 } 72 73 int 74 uart_cpu_getdev(int devtype, struct uart_devinfo *di) 75 { 76 struct uart_class *class; 77 bus_space_tag_t bst; 78 bus_space_handle_t bsh; 79 u_int shift, rclk; 80 int br, err; 81 82 /* Allow overriding the FDT using the environment. */ 83 class = &uart_ns8250_class; 84 err = uart_getenv(devtype, di, class); 85 if (!err) 86 return (0); 87 88 if (devtype != UART_DEV_CONSOLE) 89 return (ENXIO); 90 91 err = uart_cpu_fdt_probe(&class, &bst, &bsh, &br, &rclk, &shift); 92 if (err != 0) 93 return (err); 94 95 /* 96 * Finalize configuration. 97 */ 98 di->bas.chan = 0; 99 di->bas.regshft = shift; 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