wdc_mb.c revision 1.28
1 /* $NetBSD: wdc_mb.c,v 1.28 2006/01/29 21:42:41 dsl Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2003 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/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: wdc_mb.c,v 1.28 2006/01/29 21:42:41 dsl Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/malloc.h> 46 #include <sys/device.h> 47 48 #include <sys/bswap.h> 49 #include <machine/cpu.h> 50 #include <machine/bus.h> 51 #include <machine/iomap.h> 52 #include <machine/mfp.h> 53 #include <machine/dma.h> 54 55 #include <dev/ata/atavar.h> 56 #include <dev/ic/wdcvar.h> 57 58 #include <m68k/asm_single.h> 59 60 #include <atari/dev/ym2149reg.h> 61 #include <atari/atari/device.h> 62 63 /* Falcon IDE register locations (base and offsets). */ 64 #define FALCON_WD_BASE 0xfff00000 65 #define FALCON_WD_LEN 0x40 66 67 static int falcon_wd_reg[WDC_NREG + WDC_NSHADOWREG] = { 68 0x00, /* wd_data */ 69 0x05, /* wd_error */ 70 0x09, /* wd_seccnt */ 71 0x0d, /* wd_sector */ 72 0x11, /* wd_cyl_lo */ 73 0x15, /* wd_cyl_hi */ 74 0x19, /* wd_sdh */ 75 0x1d, /* wd_command */ 76 0x39, /* wd_status */ 77 0x01 /* wd_features */ 78 }; 79 80 /* 81 * XXX This code currently doesn't even try to allow 32-bit data port use. 82 */ 83 static int claim_hw __P((struct ata_channel *, int)); 84 static void free_hw __P((struct ata_channel *)); 85 static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 86 bus_size_t, u_int16_t *, bus_size_t)); 87 static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 88 bus_size_t, const u_int16_t *, bus_size_t)); 89 90 struct wdc_mb_softc { 91 struct wdc_softc sc_wdcdev; 92 struct ata_channel *sc_chanlist[1]; 93 struct ata_channel sc_channel; 94 struct ata_queue sc_chqueue; 95 struct wdc_regs sc_wdc_regs; 96 void *sc_ih; 97 }; 98 99 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 100 void wdc_mb_attach __P((struct device *, struct device *, void *)); 101 102 CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc), 103 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 104 105 int 106 wdc_mb_probe(parent, cfp, aux) 107 struct device *parent; 108 struct cfdata *cfp; 109 void *aux; 110 { 111 static int wdc_matched = 0; 112 struct ata_channel ch; 113 struct wdc_softc wdc; 114 struct wdc_regs wdr; 115 int result = 0, i; 116 u_char sv_ierb; 117 118 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 119 return 0; 120 if (!atari_realconfig) 121 return 0; 122 123 memset(&wdc, 0, sizeof(wdc)); 124 memset(&ch, 0, sizeof(ch)); 125 ch.ch_atac = &wdc.sc_atac; 126 wdc.regs = &wdr; 127 128 wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag(); 129 if (wdr.cmd_iot == NULL) 130 return 0; 131 wdr.cmd_iot->stride = 2; 132 wdr.cmd_iot->wo_1 = 1; 133 134 if (bus_space_map(wdr.cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 135 &wdr.cmd_baseioh)) 136 return 0; 137 for (i = 0; i < (WDC_NREG + WDC_NSHADOWREG); i++) 138 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, 139 falcon_wd_reg[i], i == 0 ? 2 : 1, &wdr.cmd_iohs[i]) != 0) { 140 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, 141 FALCON_WD_LEN); 142 return 0; 143 } 144 145 /* 146 * Make sure IDE interrupts are disabled during probing. 147 */ 148 sv_ierb = MFP->mf_ierb; 149 MFP->mf_ierb &= ~IB_DINT; 150 151 /* 152 * Make sure that IDE is turned on on the Falcon. 153 */ 154 if (machineid & ATARI_FALCON) 155 ym2149_ser2(0); 156 157 result = wdcprobe(&ch); 158 159 MFP->mf_ierb = sv_ierb; 160 161 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_LEN); 162 mb_free_bus_space_tag(wdr.cmd_iot); 163 164 if (result) 165 wdc_matched = 1; 166 return (result); 167 } 168 169 void 170 wdc_mb_attach(parent, self, aux) 171 struct device *parent, *self; 172 void *aux; 173 { 174 struct wdc_mb_softc *sc = (void *)self; 175 struct wdc_regs *wdr; 176 int i; 177 178 printf("\n"); 179 180 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs; 181 wdr->cmd_iot = wdr->ctl_iot = 182 mb_alloc_bus_space_tag(); 183 wdr->cmd_iot->stride = 2; 184 wdr->cmd_iot->wo_1 = 1; 185 wdr->cmd_iot->abs_rms_2 = read_multi_2_swap; 186 wdr->cmd_iot->abs_wms_2 = write_multi_2_swap; 187 if (bus_space_map(wdr->cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 188 &wdr->cmd_baseioh)) { 189 printf("%s: couldn't map registers\n", 190 sc->sc_wdcdev.sc_atac.atac_dev.dv_xname); 191 return; 192 } 193 for (i = 0; i < (WDC_NREG + WDC_NSHADOWREG); i++) 194 if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, 195 falcon_wd_reg[i], i == 0 ? 2 : 1, &wdr->cmd_iohs[i]) != 0) { 196 printf("%s: couldn't subregion cmd reg %i\n", 197 sc->sc_wdcdev.sc_atac.atac_dev.dv_xname, i); 198 bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, 199 FALCON_WD_LEN); 200 return; 201 } 202 203 /* 204 * Play a nasty trick here. Normally we only manipulate the 205 * interrupt *mask*. However to defeat wd_get_parms(), we 206 * disable the interrupts here using the *enable* register. 207 */ 208 MFP->mf_ierb &= ~IB_DINT; 209 210 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | 211 ATAC_CAP_ATA_NOSTREAM; 212 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0; 213 sc->sc_wdcdev.sc_atac.atac_claim_hw = &claim_hw; 214 sc->sc_wdcdev.sc_atac.atac_free_hw = &free_hw; 215 sc->sc_chanlist[0] = &sc->sc_channel; 216 sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist; 217 sc->sc_wdcdev.sc_atac.atac_nchannels = 1; 218 sc->sc_channel.ch_channel = 0; 219 sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac; 220 sc->sc_channel.ch_queue = &sc->sc_chqueue; 221 sc->sc_channel.ch_ndrive = 2; 222 223 /* 224 * Setup & enable disk related interrupts. 225 */ 226 MFP->mf_ierb |= IB_DINT; 227 MFP->mf_iprb = (u_int8_t)~IB_DINT; 228 MFP->mf_imrb |= IB_DINT; 229 230 wdcattach(&sc->sc_channel); 231 } 232 233 /* 234 * Hardware locking 235 */ 236 static int wd_lock; 237 238 static int 239 claim_hw(chp, maysleep) 240 struct ata_channel *chp; 241 int maysleep; 242 { 243 if (wd_lock != DMA_LOCK_GRANT) { 244 if (wd_lock == DMA_LOCK_REQ) { 245 /* 246 * ST_DMA access is being claimed. 247 */ 248 return 0; 249 } 250 if (!st_dmagrab((dma_farg)wdcintr, 251 (dma_farg)(maysleep ? NULL : wdcrestart), chp, 252 &wd_lock, 1)) 253 return 0; 254 } 255 return 1; 256 } 257 258 static void 259 free_hw(chp) 260 struct ata_channel *chp; 261 { 262 /* 263 * Flush pending interrupts before giving-up lock 264 */ 265 MFP->mf_iprb = (u_int8_t)~IB_DINT; 266 267 /* 268 * Only free the lock on a Falcon. On the Hades, keep it. 269 */ 270 /* if (machineid & ATARI_FALCON) */ 271 st_dmafree(chp, &wd_lock); 272 } 273 274 /* 275 * XXX 276 * This piece of uglyness is caused by the fact that the byte lanes of 277 * the data-register are swapped on the atari. This works OK for an IDE 278 * disk, but turns into a nightmare when used on atapi devices. 279 */ 280 #define calc_addr(base, off, stride, wm) \ 281 ((u_long)(base) + ((off) << (stride)) + (wm)) 282 283 static void 284 read_multi_2_swap(t, h, o, a, c) 285 bus_space_tag_t t; 286 bus_space_handle_t h; 287 bus_size_t o, c; 288 u_int16_t *a; 289 { 290 u_int16_t *ba; 291 292 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 293 for (; c; a++, c--) 294 *a = bswap16(*ba); 295 } 296 297 static void 298 write_multi_2_swap(t, h, o, a, c) 299 bus_space_tag_t t; 300 bus_space_handle_t h; 301 bus_size_t o, c; 302 const u_int16_t *a; 303 { 304 u_int16_t *ba; 305 306 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 307 for (; c; a++, c--) 308 *ba = bswap16(*a); 309 } 310
Indexes created Tue Sep 23 21:09:50 GMT 2025