1 /* $NetBSD: wdc_mb.c,v 1.30 2007/12/04 16:36:54 tsutsui 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 1.30 2007/12/04 16:36:54 tsutsui 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 #define FALCON_WD_AUX 0x38 67 68 /* 69 * XXX This code currently doesn't even try to allow 32-bit data port use. 70 */ 71 static int claim_hw __P((struct ata_channel *, int)); 72 static void free_hw __P((struct ata_channel *)); 73 static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 74 bus_size_t, u_int16_t *, bus_size_t)); 75 static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 76 bus_size_t, const u_int16_t *, bus_size_t)); 77 78 struct wdc_mb_softc { 79 struct wdc_softc sc_wdcdev; 80 struct ata_channel *sc_chanlist[1]; 81 struct ata_channel sc_channel; 82 struct ata_queue sc_chqueue; 83 struct wdc_regs sc_wdc_regs; 84 void *sc_ih; 85 }; 86 87 int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 88 void wdc_mb_attach __P((struct device *, struct device *, void *)); 89 90 CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc), 91 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 92 93 int 94 wdc_mb_probe(parent, cfp, aux) 95 struct device *parent; 96 struct cfdata *cfp; 97 void *aux; 98 { 99 static int wdc_matched = 0; 100 struct ata_channel ch; 101 struct wdc_softc wdc; 102 struct wdc_regs wdr; 103 int result = 0, i; 104 u_char sv_ierb; 105 106 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 107 return 0; 108 if (!atari_realconfig) 109 return 0; 110 111 memset(&wdc, 0, sizeof(wdc)); 112 memset(&ch, 0, sizeof(ch)); 113 ch.ch_atac = &wdc.sc_atac; 114 wdc.regs = &wdr; 115 116 wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag(); 117 if (wdr.cmd_iot == NULL) 118 return 0; 119 wdr.cmd_iot->stride = 0; 120 wdr.cmd_iot->wo_1 = 1; 121 122 if (bus_space_map(wdr.cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 123 &wdr.cmd_baseioh)) 124 goto out; 125 for (i = 0; i < WDC_NREG; i++) { 126 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, 127 i * 4, 4, &wdr.cmd_iohs[i]) != 0) 128 goto outunmap; 129 } 130 wdc_init_shadow_regs(&ch); 131 132 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_AUX, 4, 133 &wdr.ctl_ioh)) 134 goto outunmap; 135 136 /* 137 * Make sure IDE interrupts are disabled during probing. 138 */ 139 sv_ierb = MFP->mf_ierb; 140 MFP->mf_ierb &= ~IB_DINT; 141 142 /* 143 * Make sure that IDE is turned on on the Falcon. 144 */ 145 if (machineid & ATARI_FALCON) 146 ym2149_ser2(0); 147 148 result = wdcprobe(&ch); 149 150 MFP->mf_ierb = sv_ierb; 151 152 outunmap: 153 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_LEN); 154 out: 155 mb_free_bus_space_tag(wdr.cmd_iot); 156 157 if (result) 158 wdc_matched = 1; 159 return (result); 160 } 161 162 void 163 wdc_mb_attach(parent, self, aux) 164 struct device *parent, *self; 165 void *aux; 166 { 167 struct wdc_mb_softc *sc = (void *)self; 168 struct wdc_regs *wdr; 169 int i; 170 171 printf("\n"); 172 173 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs; 174 wdr->cmd_iot = wdr->ctl_iot = 175 mb_alloc_bus_space_tag(); 176 wdr->cmd_iot->stride = 0; 177 wdr->cmd_iot->wo_1 = 1; 178 wdr->cmd_iot->abs_rms_2 = read_multi_2_swap; 179 wdr->cmd_iot->abs_wms_2 = write_multi_2_swap; 180 if (bus_space_map(wdr->cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 181 &wdr->cmd_baseioh)) { 182 printf("%s: couldn't map registers\n", 183 sc->sc_wdcdev.sc_atac.atac_dev.dv_xname); 184 return; 185 } 186 for (i = 0; i < WDC_NREG; i++) { 187 if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, 188 i * 4, 4, &wdr->cmd_iohs[i]) != 0) { 189 printf("%s: couldn't subregion cmd reg %i\n", 190 sc->sc_wdcdev.sc_atac.atac_dev.dv_xname, i); 191 bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, 192 FALCON_WD_LEN); 193 return; 194 } 195 } 196 197 if (bus_space_subregion(wdr->cmd_iot, 198 wdr->cmd_baseioh, FALCON_WD_AUX, 4, &wdr->ctl_ioh)) { 199 bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, FALCON_WD_LEN); 200 printf("%s: couldn't subregion aux reg\n", 201 sc->sc_wdcdev.sc_atac.atac_dev.dv_xname); 202 return; 203 } 204 205 /* 206 * Play a nasty trick here. Normally we only manipulate the 207 * interrupt *mask*. However to defeat wd_get_parms(), we 208 * disable the interrupts here using the *enable* register. 209 */ 210 MFP->mf_ierb &= ~IB_DINT; 211 212 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | 213 ATAC_CAP_ATA_NOSTREAM; 214 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0; 215 sc->sc_wdcdev.sc_atac.atac_claim_hw = &claim_hw; 216 sc->sc_wdcdev.sc_atac.atac_free_hw = &free_hw; 217 sc->sc_chanlist[0] = &sc->sc_channel; 218 sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist; 219 sc->sc_wdcdev.sc_atac.atac_nchannels = 1; 220 sc->sc_channel.ch_channel = 0; 221 sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac; 222 sc->sc_channel.ch_queue = &sc->sc_chqueue; 223 sc->sc_channel.ch_ndrive = 2; 224 wdc_init_shadow_regs(&sc->sc_channel); 225 226 /* 227 * Setup & enable disk related interrupts. 228 */ 229 MFP->mf_ierb |= IB_DINT; 230 MFP->mf_iprb = (u_int8_t)~IB_DINT; 231 MFP->mf_imrb |= IB_DINT; 232 233 wdcattach(&sc->sc_channel); 234 } 235 236 /* 237 * Hardware locking 238 */ 239 static int wd_lock; 240 241 static int 242 claim_hw(chp, maysleep) 243 struct ata_channel *chp; 244 int maysleep; 245 { 246 if (wd_lock != DMA_LOCK_GRANT) { 247 if (wd_lock == DMA_LOCK_REQ) { 248 /* 249 * ST_DMA access is being claimed. 250 */ 251 return 0; 252 } 253 if (!st_dmagrab((dma_farg)wdcintr, 254 (dma_farg)(maysleep ? NULL : wdcrestart), chp, 255 &wd_lock, 1)) 256 return 0; 257 } 258 return 1; 259 } 260 261 static void 262 free_hw(chp) 263 struct ata_channel *chp; 264 { 265 /* 266 * Flush pending interrupts before giving-up lock 267 */ 268 MFP->mf_iprb = (u_int8_t)~IB_DINT; 269 270 /* 271 * Only free the lock on a Falcon. On the Hades, keep it. 272 */ 273 /* if (machineid & ATARI_FALCON) */ 274 st_dmafree(chp, &wd_lock); 275 } 276 277 /* 278 * XXX 279 * This piece of uglyness is caused by the fact that the byte lanes of 280 * the data-register are swapped on the atari. This works OK for an IDE 281 * disk, but turns into a nightmare when used on atapi devices. 282 */ 283 #define calc_addr(base, off, stride, wm) \ 284 ((u_long)(base) + ((off) << (stride)) + (wm)) 285 286 static void 287 read_multi_2_swap(t, h, o, a, c) 288 bus_space_tag_t t; 289 bus_space_handle_t h; 290 bus_size_t o, c; 291 u_int16_t *a; 292 { 293 u_int16_t *ba; 294 295 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 296 for (; c; a++, c--) 297 *a = bswap16(*ba); 298 } 299 300 static void 301 write_multi_2_swap(t, h, o, a, c) 302 bus_space_tag_t t; 303 bus_space_handle_t h; 304 bus_size_t o, c; 305 const u_int16_t *a; 306 { 307 u_int16_t *ba; 308 309 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 310 for (; c; a++, c--) 311 *ba = bswap16(*a); 312 } 313