uart_cpu_at91usart.c revision 170286
1/*- 2 * Copyright (c) 2003 Marcel Moolenaar 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27#include "opt_uart.h" 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD: head/sys/arm/at91/uart_cpu_at91rm9200usart.c 170286 2007-06-04 17:53:42Z marcel $"); 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/bus.h> 35#include <sys/cons.h> 36#include <machine/bus.h> 37 38#include <dev/uart/uart.h> 39#include <dev/uart/uart_cpu.h> 40 41#include <arm/at91/at91rm92reg.h> 42 43bus_space_tag_t uart_bus_space_io; 44bus_space_tag_t uart_bus_space_mem; 45 46extern struct uart_class at91_usart_class; 47extern struct bus_space at91_bs_tag; 48 49int 50uart_cpu_eqres(struct uart_bas *b1, struct uart_bas *b2) 51{ 52 return ((b1->bsh == b2->bsh && b1->bst == b2->bst) ? 1 : 0); 53} 54 55int 56uart_cpu_getdev(int devtype, struct uart_devinfo *di) 57{ 58 struct uart_class *class; 59 60 class = &at91_usart_class; 61 di->ops = uart_getops(class); 62 di->bas.chan = 0; 63 di->bas.bst = &at91_bs_tag; 64 /* 65 * XXX: Not pretty, but will work because we map VA == PA early 66 * for the last 1MB of memory. 67 */ 68#ifdef SKYEYE_WORKAROUNDS 69 di->bas.bsh = AT91RM92_BASE + AT91RM92_USART0_BASE; 70 di->baudrate = 38400; 71#else 72 di->bas.bsh = AT91RM92_BASE + AT91RM92_SYS_BASE + DBGU; 73 di->baudrate = 115200; 74#endif 75 di->bas.regshft = 0; 76 di->bas.rclk = 0; 77 di->databits = 8; 78 di->stopbits = 1; 79 di->parity = UART_PARITY_NONE; 80 uart_bus_space_io = &at91_bs_tag; 81 uart_bus_space_mem = NULL; 82 /* Check the environment for overrides */ 83 uart_getenv(devtype, di, class); 84 return (0); 85} 86