wdc_mb.c revision 1.3
1 /* $NetBSD: wdc_mb.c,v 1.3 1998/10/12 16:09:12 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_channel; 72 void *sc_ih; 73 }; 74 75 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 76 void wdc_mb_attach __P((struct device *, struct device *, void *)); 77 78 struct cfattach wdc_mb_ca = { 79 sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach 80 }; 81 82 int 83 wdc_mb_probe(parent, cfp, aux) 84 struct device *parent; 85 struct cfdata *cfp; 86 void *aux; 87 { 88 struct channel_softc ch = { 0 }; 89 int result = 0; 90 u_char sv_ierb; 91 92 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || cfp->cf_unit != 0) 93 return 0; 94 if (!atari_realconfig) 95 return 0; 96 97 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 98 if (ch.cmd_iot == NULL) 99 return 0; 100 ch.cmd_iot->stride = 2; 101 ch.cmd_iot->wo_1 = 1; 102 103 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh)) 104 return 0; 105 if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh)) 106 return 0; 107 108 /* 109 * Make sure IDE interrupts are disabled during probing. 110 */ 111 sv_ierb = MFP->mf_ierb; 112 MFP->mf_ierb &= ~IB_DINT; 113 114 /* 115 * Make sure that IDE is turned on on the Falcon. 116 */ 117 if (machineid & ATARI_FALCON) 118 ym2149_ser2(0); 119 120 result = wdcprobe(&ch); 121 122 MFP->mf_ierb = sv_ierb; 123 124 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40); 125 mb_free_bus_space_tag(ch.cmd_iot); 126 127 return (result); 128 } 129 130 void 131 wdc_mb_attach(parent, self, aux) 132 struct device *parent, *self; 133 void *aux; 134 { 135 struct wdc_mb_softc *sc = (void *)self; 136 137 printf("\n"); 138 139 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 140 mb_alloc_bus_space_tag(); 141 sc->wdc_channel.cmd_iot->stride = 2; 142 sc->wdc_channel.cmd_iot->wo_1 = 1; 143 sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap; 144 sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap; 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 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_HWLOCK | 163 WDC_CAPABILITY_ATA_NOSTREAM; 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 } 228 229 /* 230 * XXX 231 * This piece of uglyness is caused by the fact that the byte lanes of 232 * the data-register are swapped on the atari. This works OK for an IDE 233 * disk, but turns into a nightmare when used on atapi devices. 234 */ 235 #define calc_addr(base, off, stride, wm) \ 236 ((u_long)(base) + ((off) << (stride)) + (wm)) 237 238 static void 239 read_multi_2_swap(t, h, o, a, c) 240 bus_space_tag_t t; 241 bus_space_handle_t h; 242 bus_size_t o, c; 243 u_int16_t *a; 244 { 245 u_int16_t *ba; 246 247 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 248 for (; c; a++, c--) 249 *a = bswap16(*ba); 250 } 251 252 static void 253 write_multi_2_swap(t, h, o, a, c) 254 bus_space_tag_t t; 255 bus_space_handle_t h; 256 bus_size_t o, c; 257 const u_int16_t *a; 258 { 259 u_int16_t *ba; 260 261 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 262 for (; c; a++, c--) 263 *ba = bswap16(*a); 264 } 265
Indexes created Wed Sep 24 05:09:52 GMT 2025