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 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 "cfe.h" 51 52static void nulldrv_probe(cfe_driver_t *drv, 53 unsigned long probe_a, unsigned long probe_b, 54 void *probe_ptr); 55 56 57static int nulldrv_open(cfe_devctx_t *ctx); 58static int nulldrv_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 59static int nulldrv_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat); 60static int nulldrv_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 61static int nulldrv_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer); 62static int nulldrv_close(cfe_devctx_t *ctx); 63 64const static cfe_devdisp_t nulldrv_dispatch = { 65 nulldrv_open, 66 nulldrv_read, 67 nulldrv_inpstat, 68 nulldrv_write, 69 nulldrv_ioctl, 70 nulldrv_close, 71 NULL, 72 NULL 73}; 74 75const cfe_driver_t nulldrv = { 76 "Null console device", 77 "null", 78 CFE_DEV_SERIAL, 79 &nulldrv_dispatch, 80 nulldrv_probe 81}; 82 83 84static void nulldrv_probe(cfe_driver_t *drv, 85 unsigned long probe_a, unsigned long probe_b, 86 void *probe_ptr) 87{ 88 cfe_attach(drv,NULL,NULL,drv->drv_description); 89} 90 91 92static int nulldrv_open(cfe_devctx_t *ctx) 93{ 94/* nulldrv_t *softc = ctx->dev_softc; */ 95 96 return 0; 97} 98 99static int nulldrv_read(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 100{ 101/* nulldrv_t *softc = ctx->dev_softc; */ 102 103 buffer->buf_retlen = buffer->buf_length; 104 return 0; 105} 106 107static int nulldrv_inpstat(cfe_devctx_t *ctx,iocb_inpstat_t *inpstat) 108{ 109/* nulldrv_t *softc = ctx->dev_softc; */ 110 111 inpstat->inp_status = 0; 112 113 return 0; 114} 115 116static int nulldrv_write(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 117{ 118/* nulldrv_t *softc = ctx->dev_softc; */ 119 120 buffer->buf_retlen = buffer->buf_length; 121 return 0; 122} 123 124static int nulldrv_ioctl(cfe_devctx_t *ctx,iocb_buffer_t *buffer) 125{ 126/* nulldrv_t *softc = ctx->dev_softc;*/ 127 128 return -1; 129} 130 131static int nulldrv_close(cfe_devctx_t *ctx) 132{ 133/* nulldrv_t *softc = ctx->dev_softc; */ 134 135 return 0; 136} 137 138 139