1/* ********************************************************************* 2 * Broadcom Common Firmware Environment (CFE) 3 * 4 * Null console device File: dev_null.c 5 * 6 * This is a null console device, useful for console-less 7 * operation, or when using chip simulators. 8 * 9 * Author: Mitch Lichtenberg (mpl@broadcom.com) 10 * 11 ********************************************************************* 12 * 13 * Copyright 2000,2001,2002,2003 14 * Broadcom Corporation. All rights reserved. 15 * 16 * This software is furnished under license and may be used and 17 * copied only in accordance with the following terms and 18 * conditions. Subject to these conditions, you may download, 19 * copy, install, use, modify and distribute modified or unmodified 20 * copies of this software in source and/or binary form. No title 21 * or ownership is transferred hereby. 22 * 23 * 1) Any source code used, modified or distributed must reproduce 24 * and retain this copyright notice and list of conditions 25 * as they appear in the source file. 26 * 27 * 2) No right is granted to use any trade name, trademark, or 28 * logo of Broadcom Corporation. The "Broadcom Corporation" 29 * name may not be used to endorse or promote products derived 30 * from this software without the prior written permission of 31 * Broadcom Corporation. 32 * 33 * 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR 34 * IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED 35 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 36 * PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT 37 * SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN 38 * PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT, 39 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 40 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 41 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 42 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 43 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR 44 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF 45 * THE POSSIBILITY OF SUCH DAMAGE. 46 ********************************************************************* */ 47 48 49 50#include "lib_types.h" 51#include "lib_malloc.h" 52#include "lib_printf.h" 53#include "cfe_iocb.h" 54#include "cfe_device.h" 55 56static void nulldrv_probe(cfe_driver_t *drv, 57 unsigned long probe_a, unsigned long probe_b, 58 void *probe_ptr); 59 60 61static int nulldrv_open(cfe_devctx_t *ctx); 62static int nulldrv_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 63static int nulldrv_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat); 64static int nulldrv_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 65static int nulldrv_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 66static int nulldrv_close(cfe_devctx_t *ctx); 67 68const static cfe_devdisp_t nulldrv_dispatch = { 69 nulldrv_open, 70 nulldrv_read, 71 nulldrv_inpstat, 72 nulldrv_write, 73 nulldrv_ioctl, 74 nulldrv_close, 75 NULL, 76 NULL 77}; 78 79const cfe_driver_t nulldrv = { 80 "Null console device", 81 "null", 82 CFE_DEV_SERIAL, 83 &nulldrv_dispatch, 84 nulldrv_probe 85}; 86 87 88static void nulldrv_probe(cfe_driver_t *drv, 89 unsigned long probe_a, unsigned long probe_b, 90 void *probe_ptr) 91{ 92 cfe_attach(drv,NULL,NULL,drv->drv_description); 93} 94 95 96static int nulldrv_open(cfe_devctx_t *ctx) 97{ 98/* nulldrv_t *softc = ctx->dev_softc; */ 99 100 return 0; 101} 102 103static int nulldrv_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 104{ 105/* nulldrv_t *softc = ctx->dev_softc; */ 106 107 buffer->buf_retlen = buffer->buf_length; 108 return 0; 109} 110 111static int nulldrv_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat) 112{ 113/* nulldrv_t *softc = ctx->dev_softc; */ 114 115 inpstat->inp_status = 0; 116 117 return 0; 118} 119 120static int nulldrv_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 121{ 122/* nulldrv_t *softc = ctx->dev_softc; */ 123 124 buffer->buf_retlen = buffer->buf_length; 125 return 0; 126} 127 128static int nulldrv_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 129{ 130/* nulldrv_t *softc = ctx->dev_softc;*/ 131 132 return -1; 133} 134 135static int nulldrv_close(cfe_devctx_t *ctx) 136{ 137/* nulldrv_t *softc = ctx->dev_softc; */ 138 139 return 0; 140} 141 142 143