Date: Thu, 8 Nov 2012 12:44:10 +0000 (UTC) From: Aleksandr Rybalko <ray@FreeBSD.org> To: src-committers@freebsd.org, svn-src-projects@freebsd.org Subject: svn commit: r242757 - projects/efika_mx/sys/arm/freescale/imx Message-ID: <201211081244.qA8CiAXd072546@svn.freebsd.org>
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Author: ray Date: Thu Nov 8 12:44:10 2012 New Revision: 242757 URL: http://svnweb.freebsd.org/changeset/base/242757 Log: Add simple UART console driver. Added: projects/efika_mx/sys/arm/freescale/imx/console.c Added: projects/efika_mx/sys/arm/freescale/imx/console.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ projects/efika_mx/sys/arm/freescale/imx/console.c Thu Nov 8 12:44:10 2012 (r242757) @@ -0,0 +1,163 @@ +/*- + * Copyright (c) 2012 The FreeBSD Foundation + * All rights reserved. + * + * This software was developed by Oleksandr Rybalko under sponsorship + * from the FreeBSD Foundation. + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* Simple UART console driver for Freescale i.MX515 */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/cons.h> +#include <sys/consio.h> +#include <sys/kernel.h> + +/* Allow it to be predefined, to be able to use another UART for console */ +#ifndef IMX_UART_BASE +#define IMX_UART_BASE 0xe3fbc000 /* UART1 */ +#endif + +#define IMX_RXD (u_int32_t *)(IMX_UART_BASE + 0x00) +#define IMX_TXD (u_int32_t *)(IMX_UART_BASE + 0x40) + +#define IMX_UFCR (u_int32_t *)(IMX_UART_BASE + 0x90) +#define IMX_USR1 (u_int32_t *)(IMX_UART_BASE + 0x94) +#define IMX_USR1_TRDY (1 << 13) + +#define IMX_USR2 (u_int32_t *)(IMX_UART_BASE + 0x98) +#define IMX_USR2_RDR (1 << 0) +#define IMX_USR2_TXFE (1 << 14) +#define IMX_USR2_TXDC (1 << 3) + +#define IMX_UTS (u_int32_t *)(IMX_UART_BASE + 0xb4) +#define IMX_UTS_TXFULL (1 << 4) + +/* + * uart related funcs + */ +static u_int32_t +uart_getreg(u_int32_t *bas) +{ + + return *((volatile u_int32_t *)(bas)) & 0xff; +} + +static void +uart_setreg(u_int32_t *bas, u_int32_t val) +{ + + *((volatile u_int32_t *)(bas)) = (u_int32_t)val; +} + +static int +ub_tstc(void) +{ + + return ((uart_getreg(IMX_USR2) & IMX_USR2_RDR) ? 1 : 0); +} + +static int +ub_getc(void) +{ + + while (!ub_tstc()); + __asm __volatile("nop"); + + return (uart_getreg(IMX_RXD) & 0xff); +} + +static void +ub_putc(unsigned char c) +{ + + if (c == '\n') + ub_putc('\r'); + + while (uart_getreg(IMX_UTS) & IMX_UTS_TXFULL) + __asm __volatile("nop"); + + uart_setreg(IMX_TXD, c); +} + +static cn_probe_t uart_cnprobe; +static cn_init_t uart_cninit; +static cn_term_t uart_cnterm; +static cn_getc_t uart_cngetc; +static cn_putc_t uart_cnputc; +static cn_grab_t uart_cngrab; +static cn_ungrab_t uart_cnungrab; + +static void +uart_cngrab(struct consdev *cp) +{ + +} + +static void +uart_cnungrab(struct consdev *cp) +{ + +} + + +static void +uart_cnprobe(struct consdev *cp) +{ + + sprintf(cp->cn_name, "uart"); + cp->cn_pri = CN_NORMAL; +} + +static void +uart_cninit(struct consdev *cp) +{ + uart_setreg(IMX_UFCR, 0x00004210); +} + +void +uart_cnputc(struct consdev *cp, int c) +{ + + ub_putc(c); +} + +int +uart_cngetc(struct consdev * cp) +{ + + return ub_getc(); +} + +static void +uart_cnterm(struct consdev * cp) +{ + +} + +CONSOLE_DRIVER(uart);
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