wdc_mb.c revision 1.5
1 /* $NetBSD: wdc_mb.c,v 1.5 1998/12/03 18:24:30 bouyer Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Charles M. Hannum and by Onno van der Linden. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/malloc.h> 43 #include <sys/device.h> 44 45 #include <machine/cpu.h> 46 #include <machine/bus.h> 47 #include <machine/iomap.h> 48 #include <machine/mfp.h> 49 #include <machine/dma.h> 50 51 #include <dev/ata/atavar.h> 52 #include <dev/ic/wdcvar.h> 53 54 #include <m68k/asm_single.h> 55 56 #include <atari/dev/ym2149reg.h> 57 #include <atari/atari/device.h> 58 59 /* 60 * XXX This code currently doesn't even try to allow 32-bit data port use. 61 */ 62 static int claim_hw __P((void *, int)); 63 static void free_hw __P((void *)); 64 static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 65 bus_size_t, u_int16_t *, bus_size_t)); 66 static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 67 bus_size_t, const u_int16_t *, bus_size_t)); 68 69 struct wdc_mb_softc { 70 struct wdc_softc sc_wdcdev; 71 struct channel_softc *wdc_chanptr; 72 struct channel_softc wdc_channel; 73 void *sc_ih; 74 }; 75 76 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 77 void wdc_mb_attach __P((struct device *, struct device *, void *)); 78 79 struct cfattach wdc_mb_ca = { 80 sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach 81 }; 82 83 int 84 wdc_mb_probe(parent, cfp, aux) 85 struct device *parent; 86 struct cfdata *cfp; 87 void *aux; 88 { 89 struct channel_softc ch = { 0 }; 90 int result = 0; 91 u_char sv_ierb; 92 93 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || cfp->cf_unit != 0) 94 return 0; 95 if (!atari_realconfig) 96 return 0; 97 98 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 99 if (ch.cmd_iot == NULL) 100 return 0; 101 ch.cmd_iot->stride = 2; 102 ch.cmd_iot->wo_1 = 1; 103 104 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh)) 105 return 0; 106 if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh)) 107 return 0; 108 109 /* 110 * Make sure IDE interrupts are disabled during probing. 111 */ 112 sv_ierb = MFP->mf_ierb; 113 MFP->mf_ierb &= ~IB_DINT; 114 115 /* 116 * Make sure that IDE is turned on on the Falcon. 117 */ 118 if (machineid & ATARI_FALCON) 119 ym2149_ser2(0); 120 121 result = wdcprobe(&ch); 122 123 MFP->mf_ierb = sv_ierb; 124 125 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40); 126 mb_free_bus_space_tag(ch.cmd_iot); 127 128 return (result); 129 } 130 131 void 132 wdc_mb_attach(parent, self, aux) 133 struct device *parent, *self; 134 void *aux; 135 { 136 struct wdc_mb_softc *sc = (void *)self; 137 138 printf("\n"); 139 140 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 141 mb_alloc_bus_space_tag(); 142 sc->wdc_channel.cmd_iot->stride = 2; 143 sc->wdc_channel.cmd_iot->wo_1 = 1; 144 sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap; 145 sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap; 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_DATA16 | WDC_CAPABILITY_HWLOCK | 164 WDC_CAPABILITY_ATA_NOSTREAM; 165 sc->sc_wdcdev.PIO_cap = 0; 166 sc->sc_wdcdev.claim_hw = &claim_hw; 167 sc->sc_wdcdev.free_hw = &free_hw; 168 sc->wdc_chanptr = &sc->wdc_channel; 169 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 170 sc->sc_wdcdev.nchannels = 1; 171 sc->wdc_channel.channel = 0; 172 sc->wdc_channel.wdc = &sc->sc_wdcdev; 173 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 174 M_DEVBUF, M_NOWAIT); 175 if (sc->wdc_channel.ch_queue == NULL) { 176 printf("%s: can't allocate memory for command queue", 177 sc->sc_wdcdev.sc_dev.dv_xname); 178 return; 179 } 180 wdcattach(&sc->wdc_channel); 181 182 /* 183 * Setup & enable disk related interrupts. 184 */ 185 MFP->mf_ierb |= IB_DINT; 186 MFP->mf_iprb &= ~IB_DINT; 187 MFP->mf_imrb |= IB_DINT; 188 } 189 190 /* 191 * Hardware locking 192 */ 193 static int wd_lock; 194 195 static int 196 claim_hw(softc, maysleep) 197 void *softc; 198 int maysleep; 199 { 200 if (wd_lock != DMA_LOCK_GRANT) { 201 if (wd_lock == DMA_LOCK_REQ) { 202 /* 203 * ST_DMA access is being claimed. 204 */ 205 return 0; 206 } 207 if (!st_dmagrab((dma_farg)wdcintr, 208 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 209 &wd_lock, 1)) 210 return 0; 211 } 212 return 1; 213 } 214 215 static void 216 free_hw(softc) 217 void *softc; 218 { 219 /* 220 * Flush pending interrupts before giving-up lock 221 */ 222 single_inst_bclr_b(MFP->mf_iprb, IB_DINT); 223 224 /* 225 * Only free the lock on a Falcon. On the Hades, keep it. 226 */ 227 /* if (machineid & ATARI_FALCON) */ 228 st_dmafree(softc, &wd_lock); 229 } 230 231 /* 232 * XXX 233 * This piece of uglyness is caused by the fact that the byte lanes of 234 * the data-register are swapped on the atari. This works OK for an IDE 235 * disk, but turns into a nightmare when used on atapi devices. 236 */ 237 #define calc_addr(base, off, stride, wm) \ 238 ((u_long)(base) + ((off) << (stride)) + (wm)) 239 240 static void 241 read_multi_2_swap(t, h, o, a, c) 242 bus_space_tag_t t; 243 bus_space_handle_t h; 244 bus_size_t o, c; 245 u_int16_t *a; 246 { 247 u_int16_t *ba; 248 249 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 250 for (; c; a++, c--) 251 *a = bswap16(*ba); 252 } 253 254 static void 255 write_multi_2_swap(t, h, o, a, c) 256 bus_space_tag_t t; 257 bus_space_handle_t h; 258 bus_size_t o, c; 259 const u_int16_t *a; 260 { 261 u_int16_t *ba; 262 263 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 264 for (; c; a++, c--) 265 *ba = bswap16(*a); 266 } 267
Indexes created Tue Sep 23 22:09:46 GMT 2025