otgsc.c revision 1.1
1 /* 2 * Copyright (c) 1982, 1990 The Regents of the University of California. 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 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)csa12gdma.c 34 * $Id: otgsc.c,v 1.1 1994/05/08 05:53:30 chopps Exp $ 35 */ 36 37 /* 38 * dummy CSA 12 Gauge 5380 DMA driver 39 */ 40 41 #include "csa12gscsi.h" 42 43 #if NCSA12GSCSI > 0 44 45 #include <sys/param.h> 46 47 #include <amiga/dev/device.h> 48 #include <amiga/dev/scivar.h> 49 #include <amiga/dev/scireg.h> 50 51 #define QPRINTF 52 #ifdef DEBUG 53 extern int sci_debug; 54 #endif 55 #define HIST(h,w) 56 57 extern int sci_data_wait; 58 59 static int dma_xfer_in __P((struct sci_softc *dev, int len, 60 register u_char *buf, int phase)); 61 static int dma_xfer_out __P((struct sci_softc *dev, int len, 62 register u_char *buf, int phase)); 63 64 void 65 csa12gdmainit (dev) 66 struct sci_softc *dev; 67 { 68 dev->dma_xfer_in = dma_xfer_in; 69 dev->dma_xfer_out = dma_xfer_out; 70 } 71 72 static int 73 dma_xfer_in (dev, len, buf, phase) 74 struct sci_softc *dev; 75 int len; 76 register u_char *buf; 77 int phase; 78 { 79 int wait = sci_data_wait; 80 u_char csr; 81 u_char *obp = buf; 82 volatile register u_char *sci_dma = dev->sci_data + 0x80; 83 volatile register u_char *sci_csr = dev->sci_csr; 84 volatile register u_char *sci_icmd = dev->sci_icmd; 85 86 QPRINTF(("csa12gdma_in %d, csr=%02x\n", len, *dev->sci_bus_csr)); 87 88 *dev->sci_tcmd = phase; 89 *dev->sci_mode |= SCI_MODE_DMA; 90 *dev->sci_icmd = 0; 91 *dev->sci_irecv = 0; 92 while (len > 0) { 93 wait = sci_data_wait; 94 while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) != 95 (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) { 96 if (!(*sci_csr & SCI_CSR_PHASE_MATCH) 97 || !(*dev->sci_bus_csr & SCI_BUS_BSY) 98 || --wait < 0) { 99 #ifdef DEBUG 100 if (sci_debug) 101 printf("csa12g_in fail: l%d i%x w%d\n", 102 len, csr, wait); 103 #endif 104 HIST(ixin_wait, wait) 105 *dev->sci_mode &= ~SCI_MODE_DMA; 106 return 0; 107 } 108 } 109 110 *buf++ = *sci_dma; 111 len--; 112 } 113 114 QPRINTF(("csa12gdma_in {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 115 len, obp[0], obp[1], obp[2], obp[3], obp[4], obp[5], 116 obp[6], obp[7], obp[8], obp[9])); 117 118 /* this leaves with one csr to be read */ 119 HIST(ixin_wait, wait) 120 *dev->sci_mode &= ~SCI_MODE_DMA; 121 return 0; 122 } 123 124 static int 125 dma_xfer_out (dev, len, buf, phase) 126 struct sci_softc *dev; 127 int len; 128 register u_char *buf; 129 int phase; 130 { 131 int wait = sci_data_wait; 132 u_char csr; 133 u_char *obp = buf; 134 volatile register u_char *sci_dma = dev->sci_data + 0x80; 135 volatile register u_char *sci_csr = dev->sci_csr; 136 volatile register u_char *sci_icmd = dev->sci_icmd; 137 138 QPRINTF(("csa12gdma_out %d, csr=%02x\n", len, *dev->sci_bus_csr)); 139 140 QPRINTF(("csa12gdma_out {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", 141 len, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], 142 buf[6], buf[7], buf[8], buf[9])); 143 144 *dev->sci_tcmd = phase; 145 *dev->sci_mode |= SCI_MODE_DMA; 146 *dev->sci_icmd = SCI_ICMD_DATA; 147 *dev->sci_dma_send = 0; 148 while (len > 0) { 149 wait = sci_data_wait; 150 while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) != 151 (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) { 152 if (!(*sci_csr & SCI_CSR_PHASE_MATCH) 153 || !(*dev->sci_bus_csr & SCI_BUS_BSY) 154 || --wait < 0) { 155 #ifdef DEBUG 156 if (sci_debug) 157 printf("csa12gdma_out fail: l%d i%x w%d\n", 158 len, csr, wait); 159 #endif 160 HIST(ixin_wait, wait) 161 *dev->sci_mode &= ~SCI_MODE_DMA; 162 return 0; 163 } 164 } 165 166 *sci_dma = *buf++; 167 len--; 168 } 169 170 wait = sci_data_wait; 171 while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) == 172 SCI_CSR_PHASE_MATCH && --wait); 173 174 175 HIST(ixin_wait, wait) 176 *dev->sci_mode &= ~SCI_MODE_DMA; 177 return 0; 178 } 179 #endif 180
Indexes created Wed Sep 24 22:09:59 GMT 2025