wdc_mb.c revision 1.1.2.2
1 /* $NetBSD: wdc_mb.c,v 1.1.2.2 1998/06/05 08:38:56 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/malloc.h> 41 #include <sys/device.h> 42 43 #include <machine/cpu.h> 44 #include <machine/bus.h> 45 #include <machine/iomap.h> 46 #include <machine/mfp.h> 47 #include <machine/dma.h> 48 49 #include <dev/ata/atavar.h> 50 #include <dev/ic/wdcvar.h> 51 52 #include <m68k/asm_single.h> 53 54 #include <atari/dev/ym2149reg.h> 55 #include <atari/atari/device.h> 56 57 /* 58 * XXX This code currently doesn't even try to allow 32-bit data port use. 59 */ 60 static int claim_hw __P((void *, int)); 61 static void free_hw __P((void *)); 62 63 struct wdc_mb_softc { 64 struct wdc_softc sc_wdcdev; 65 struct channel_softc wdc_channel; 66 void *sc_ih; 67 }; 68 69 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 70 void wdc_mb_attach __P((struct device *, struct device *, void *)); 71 72 struct cfattach wdc_mb_ca = { 73 sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach 74 }; 75 76 int 77 wdc_mb_probe(parent, cfp, aux) 78 struct device *parent; 79 struct cfdata *cfp; 80 void *aux; 81 { 82 #if 0 /* XXX memset */ 83 struct channel_softc ch = { 0 }; 84 #else /* XXX memset */ 85 struct channel_softc ch; 86 #endif /* XXX memset */ 87 int result = 0; 88 u_char sv_ierb; 89 90 #if 0 /* XXX memset */ 91 #else /* XXX memset */ 92 bzero(&ch, sizeof ch); 93 #endif /* XXX memset */ 94 95 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || cfp->cf_unit != 0) 96 return 0; 97 if (!atari_realconfig) 98 return 0; 99 100 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 101 if (ch.cmd_iot == NULL) 102 return 0; 103 ch.cmd_iot->stride = 2; 104 ch.cmd_iot->wo_1 = 1; 105 106 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh)) 107 return 0; 108 if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh)) 109 return 0; 110 111 /* 112 * Make sure IDE interrupts are disabled during probing. 113 */ 114 sv_ierb = MFP->mf_ierb; 115 MFP->mf_ierb &= ~IB_DINT; 116 117 /* 118 * Make sure that IDE is turned on on the Falcon. 119 */ 120 if (machineid & ATARI_FALCON) 121 ym2149_ser2(0); 122 123 result = wdcprobe(&ch); 124 125 MFP->mf_ierb = sv_ierb; 126 127 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40); 128 mb_free_bus_space_tag(ch.cmd_iot); 129 130 return (result); 131 } 132 133 void 134 wdc_mb_attach(parent, self, aux) 135 struct device *parent, *self; 136 void *aux; 137 { 138 struct wdc_mb_softc *sc = (void *)self; 139 140 printf("\n"); 141 142 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 143 mb_alloc_bus_space_tag(); 144 sc->wdc_channel.cmd_iot->stride = 2; 145 sc->wdc_channel.cmd_iot->wo_1 = 1; 146 if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0, 147 &sc->wdc_channel.cmd_ioh)) { 148 printf("%s: couldn't map registers\n", 149 sc->sc_wdcdev.sc_dev.dv_xname); 150 return; 151 } 152 if (bus_space_subregion(sc->wdc_channel.cmd_iot, 153 sc->wdc_channel.cmd_ioh, 0x38, 1, &sc->wdc_channel.ctl_ioh)) 154 return; 155 156 /* 157 * Play a nasty trick here. Normally we only manipulate the 158 * interrupt *mask*. However to defeat wd_get_parms(), we 159 * disable the interrupts here using the *enable* register. 160 */ 161 MFP->mf_ierb &= ~IB_DINT; 162 163 sc->sc_wdcdev.cap |= WDC_CAPABILITY_HWLOCK; 164 sc->sc_wdcdev.pio_mode = 0; 165 sc->sc_wdcdev.claim_hw = &claim_hw; 166 sc->sc_wdcdev.free_hw = &free_hw; 167 sc->sc_wdcdev.channels = &sc->wdc_channel; 168 sc->sc_wdcdev.nchannels = 1; 169 sc->wdc_channel.channel = 0; 170 sc->wdc_channel.wdc = &sc->sc_wdcdev; 171 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 172 M_DEVBUF, M_NOWAIT); 173 if (sc->wdc_channel.ch_queue == NULL) { 174 printf("%s: can't allocate memory for command queue", 175 sc->sc_wdcdev.sc_dev.dv_xname); 176 return; 177 } 178 wdcattach(&sc->wdc_channel); 179 180 /* 181 * Setup & enable disk related interrupts. 182 */ 183 MFP->mf_ierb |= IB_DINT; 184 MFP->mf_iprb &= ~IB_DINT; 185 MFP->mf_imrb |= IB_DINT; 186 } 187 188 /* 189 * Hardware locking 190 */ 191 static int wd_lock; 192 193 static int 194 claim_hw(softc, maysleep) 195 void *softc; 196 int maysleep; 197 { 198 if (wd_lock != DMA_LOCK_GRANT) { 199 if (wd_lock == DMA_LOCK_REQ) { 200 /* 201 * ST_DMA access is being claimed. 202 */ 203 return 0; 204 } 205 if (!st_dmagrab((dma_farg)wdcintr, 206 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 207 &wd_lock, 1)) 208 return 0; 209 } 210 return 1; 211 } 212 213 static void 214 free_hw(softc) 215 void *softc; 216 { 217 /* 218 * Flush pending interrupts before giving-up lock 219 */ 220 single_inst_bclr_b(MFP->mf_iprb, IB_DINT); 221 222 /* 223 * Only free the lock on a Falcon. On the Hades, keep it. 224 */ 225 /* if (machineid & ATARI_FALCON) */ 226 st_dmafree(softc, &wd_lock); 227 } 228
Indexes created Tue Sep 30 11:09:46 GMT 2025