wdc_mb.c revision 1.1.2.1
1 /* $NetBSD: wdc_mb.c,v 1.1.2.1 1998/06/04 16:53:40 bouyer Exp $ */ 2 3 /* 4 * Copyright (c) 1994, 1995 Charles M. Hannum. All rights reserved. 5 * 6 * DMA and multi-sector PIO handling are derived from code contributed by 7 * Onno van der Linden. 8 * 9 * ISA attachment created by Christopher G. Demetriou. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Charles M. Hannum. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/device.h> 41 42 #include <machine/cpu.h> 43 #include <machine/bus.h> 44 #include <machine/iomap.h> 45 #include <machine/mfp.h> 46 #include <machine/dma.h> 47 48 #include <dev/ata/atavar.h> 49 #include <dev/ic/wdcvar.h> 50 51 #include <m68k/asm_single.h> 52 53 #include <atari/dev/ym2149reg.h> 54 #include <atari/atari/device.h> 55 56 /* 57 * XXX This code currently doesn't even try to allow 32-bit data port use. 58 */ 59 static int claim_hw __P((void *, int)); 60 static void free_hw __P((void *)); 61 62 struct wdc_mb_softc { 63 struct wdc_softc sc_wdcdev; 64 struct channel_softc wdc_channel; 65 void *sc_ih; 66 }; 67 68 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 69 void wdc_mb_attach __P((struct device *, struct device *, void *)); 70 71 struct cfattach wdc_mb_ca = { 72 sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach 73 }; 74 75 int 76 wdc_mb_probe(parent, cfp, aux) 77 struct device *parent; 78 struct cfdata *cfp; 79 void *aux; 80 { 81 #if 0 /* XXX memset */ 82 struct channel_softc ch = { 0 }; 83 #else /* XXX memset */ 84 struct channel_softc ch; 85 #endif /* XXX memset */ 86 int result = 0; 87 u_char sv_ierb; 88 89 #if 0 /* XXX memset */ 90 #else /* XXX memset */ 91 bzero(&ch, sizeof ch); 92 #endif /* XXX memset */ 93 94 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || cfp->cf_unit != 0) 95 return 0; 96 if (!atari_realconfig) 97 return 0; 98 99 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 100 if (ch.cmd_iot == NULL) 101 return 0; 102 ch.cmd_iot->stride = 2; 103 ch.cmd_iot->wo_1 = 1; 104 105 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh)) 106 return 0; 107 if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh)) 108 return 0; 109 110 /* 111 * Make sure IDE interrupts are disabled during probing. 112 */ 113 sv_ierb = MFP->mf_ierb; 114 MFP->mf_ierb &= ~IB_DINT; 115 116 /* 117 * Make sure that IDE is turned on on the Falcon. 118 */ 119 if (machineid & ATARI_FALCON) 120 ym2149_ser2(0); 121 122 result = wdcprobe(&ch); 123 124 MFP->mf_ierb = sv_ierb; 125 126 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40); 127 mb_free_bus_space_tag(ch.cmd_iot); 128 129 return (result); 130 } 131 132 void 133 wdc_mb_attach(parent, self, aux) 134 struct device *parent, *self; 135 void *aux; 136 { 137 struct wdc_mb_softc *sc = (void *)self; 138 139 printf("\n"); 140 141 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 142 mb_alloc_bus_space_tag(); 143 sc->wdc_channel.cmd_iot->stride = 2; 144 sc->wdc_channel.cmd_iot->wo_1 = 1; 145 if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0, 146 &sc->wdc_channel.cmd_ioh)) { 147 printf("%s: couldn't map registers\n", 148 sc->sc_wdcdev.sc_dev.dv_xname); 149 return; 150 } 151 if (bus_space_subregion(sc->wdc_channel.cmd_iot, 152 sc->wdc_channel.cmd_ioh, 0x38, 1, &sc->wdc_channel.ctl_ioh)) 153 return; 154 155 /* 156 * Play a nasty trick here. Normally we only manipulate the 157 * interrupt *mask*. However to defeat wd_get_parms(), we 158 * disable the interrupts here using the *enable* register. 159 */ 160 MFP->mf_ierb &= ~IB_DINT; 161 162 /* 163 * XXX: Is this true on all atari's?? 164 */ 165 /* sc->sc_wdcdev.sc_flags |= WDCF_SINGLE; *//* XXX why is this here ? */ 166 167 sc->wdc_channel.cap |= WDC_CAPABILITY_HWLOCK; 168 sc->sc_wdcdev.pio_mode = 0; 169 sc->wdc_channel.claim_hw = &claim_hw; 170 sc->wdc_channel.free_hw = &free_hw; 171 sc->sc_wdcdev.channels = &sc->wdc_channel; 172 sc->sc_wdcdev.nchannels = 1; 173 sc->wdc_channel.channel = 0; 174 sc->wdc_channel.ch_drive[0].ctrl_softc = 175 sc->wdc_channel.ch_drive[1].ctrl_softc = &sc->sc_wdcdev; 176 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 177 M_DEVBUF, M_NOWAIT); 178 if (sc->wdc_channel.ch_queue == NULL) { 179 printf("%s: can't allocate memory for command queue", 180 sc->sc_wdcdev.sc_dev.dv_xname); 181 return; 182 } 183 wdcattach(&sc->wdc_channel); 184 185 /* 186 * Setup & enable disk related interrupts. 187 */ 188 MFP->mf_ierb |= IB_DINT; 189 MFP->mf_iprb &= ~IB_DINT; 190 MFP->mf_imrb |= IB_DINT; 191 } 192 193 /* 194 * Hardware locking 195 */ 196 static int wd_lock; 197 198 static int 199 claim_hw(softc, maysleep) 200 void *softc; 201 int maysleep; 202 { 203 void wdcrestart __P((void *)); 204 205 if (wd_lock != DMA_LOCK_GRANT) { 206 if (wd_lock == DMA_LOCK_REQ) { 207 /* 208 * ST_DMA access is being claimed. 209 */ 210 return 0; 211 } 212 if (!st_dmagrab((dma_farg)wdcintr, 213 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 214 &wd_lock, 1)) 215 return 0; 216 } 217 return 1; 218 } 219 220 static void 221 free_hw(softc) 222 void *softc; 223 { 224 /* 225 * Flush pending interrupts before giving-up lock 226 */ 227 single_inst_bclr_b(MFP->mf_iprb, IB_DINT); 228 229 /* 230 * Only free the lock on a Falcon. On the Hades, keep it. 231 */ 232 /* if (machineid & ATARI_FALCON) */ 233 st_dmafree(softc, &wd_lock); 234 } 235
Indexes created Tue Sep 30 11:09:46 GMT 2025