1 /* $NetBSD: wdc_mb.c,v 1.43 2023/12/20 00:40:42 thorpej 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: wdc_mb.c,v 1.43 2023/12/20 00:40:42 thorpej Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/device.h> 39 40 #include <sys/bswap.h> 41 #include <machine/cpu.h> 42 #include <sys/bus.h> 43 #include <machine/iomap.h> 44 #include <machine/mfp.h> 45 #include <machine/dma.h> 46 47 #include <dev/ata/atavar.h> 48 #include <dev/ic/wdcvar.h> 49 50 #include <m68k/asm_single.h> 51 52 #include <atari/dev/ym2149reg.h> 53 #include <atari/atari/device.h> 54 55 /* Falcon IDE register locations (base and offsets). */ 56 #define FALCON_WD_BASE 0xfff00000 57 #define FALCON_WD_LEN 0x40 58 #define FALCON_WD_AUX 0x38 59 60 /* 61 * XXX This code currently doesn't even try to allow 32-bit data port use. 62 */ 63 static int claim_hw(struct ata_channel *, int); 64 static void free_hw(struct ata_channel *); 65 static void read_multi_2_swap(bus_space_tag_t, bus_space_handle_t, 66 bus_size_t, uint16_t *, bus_size_t); 67 static void write_multi_2_swap(bus_space_tag_t, bus_space_handle_t, 68 bus_size_t, const uint16_t *, bus_size_t); 69 70 struct wdc_mb_softc { 71 struct wdc_softc sc_wdcdev; 72 struct ata_channel *sc_chanlist[1]; 73 struct ata_channel sc_channel; 74 struct wdc_regs sc_wdc_regs; 75 void *sc_ih; 76 }; 77 78 static int wdc_mb_probe(device_t, struct cfdata *, void *); 79 static void wdc_mb_attach(device_t, device_t, void *); 80 81 CFATTACH_DECL_NEW(wdc_mb, sizeof(struct wdc_mb_softc), 82 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 83 84 static int 85 wdc_mb_probe(device_t parent, cfdata_t cfp, void *aux) 86 { 87 static int wdc_matched = 0; 88 struct wdc_regs wdr; 89 int result = 0, i; 90 uint8_t sv_ierb; 91 92 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 93 return 0; 94 if (!atari_realconfig) 95 return 0; 96 97 wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag(); 98 if (wdr.cmd_iot == NULL) 99 return 0; 100 wdr.cmd_iot->stride = 0; 101 wdr.cmd_iot->wo_1 = 1; 102 103 if (bus_space_map(wdr.cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 104 &wdr.cmd_baseioh)) 105 goto out; 106 for (i = 0; i < WDC_NREG; i++) { 107 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, 108 i * 4, 4, &wdr.cmd_iohs[i]) != 0) 109 goto outunmap; 110 } 111 wdc_init_shadow_regs(&wdr); 112 113 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_AUX, 4, 114 &wdr.ctl_ioh)) 115 goto outunmap; 116 117 /* 118 * Make sure IDE interrupts are disabled during probing. 119 */ 120 sv_ierb = MFP->mf_ierb; 121 MFP->mf_ierb &= ~IB_DINT; 122 123 /* 124 * Make sure that IDE is turned on on the Falcon. 125 */ 126 if (machineid & ATARI_FALCON) 127 ym2149_ser2(0); 128 129 result = wdcprobe(&wdr); 130 131 MFP->mf_ierb = sv_ierb; 132 133 outunmap: 134 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, FALCON_WD_LEN); 135 out: 136 mb_free_bus_space_tag(wdr.cmd_iot); 137 138 if (result) 139 wdc_matched = 1; 140 return result; 141 } 142 143 static void 144 wdc_mb_attach(device_t parent, device_t self, void *aux) 145 { 146 struct wdc_mb_softc *sc = device_private(self); 147 struct wdc_regs *wdr; 148 int i; 149 150 aprint_normal("\n"); 151 152 sc->sc_wdcdev.sc_atac.atac_dev = self; 153 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs; 154 wdr->cmd_iot = wdr->ctl_iot = 155 mb_alloc_bus_space_tag(); 156 wdr->cmd_iot->stride = 0; 157 wdr->cmd_iot->wo_1 = 1; 158 wdr->cmd_iot->abs_rms_2 = read_multi_2_swap; 159 wdr->cmd_iot->abs_wms_2 = write_multi_2_swap; 160 if (bus_space_map(wdr->cmd_iot, FALCON_WD_BASE, FALCON_WD_LEN, 0, 161 &wdr->cmd_baseioh)) { 162 aprint_error_dev(self, "couldn't map registers\n"); 163 return; 164 } 165 for (i = 0; i < WDC_NREG; i++) { 166 if (bus_space_subregion(wdr->cmd_iot, wdr->cmd_baseioh, 167 i * 4, 4, &wdr->cmd_iohs[i]) != 0) { 168 aprint_error_dev(self, 169 "couldn't subregion cmd reg %i\n", i); 170 bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, 171 FALCON_WD_LEN); 172 return; 173 } 174 } 175 176 if (bus_space_subregion(wdr->cmd_iot, 177 wdr->cmd_baseioh, FALCON_WD_AUX, 4, &wdr->ctl_ioh)) { 178 bus_space_unmap(wdr->cmd_iot, wdr->cmd_baseioh, FALCON_WD_LEN); 179 aprint_error_dev(self, "couldn't subregion aux reg\n"); 180 return; 181 } 182 183 /* 184 * Play a nasty trick here. Normally we only manipulate the 185 * interrupt *mask*. However to defeat wd_get_parms(), we 186 * disable the interrupts here using the *enable* register. 187 */ 188 MFP->mf_ierb &= ~IB_DINT; 189 190 sc->sc_wdcdev.sc_atac.atac_cap |= ATAC_CAP_DATA16 | 191 ATAC_CAP_ATA_NOSTREAM; 192 sc->sc_wdcdev.sc_atac.atac_pio_cap = 0; 193 sc->sc_wdcdev.sc_atac.atac_claim_hw = &claim_hw; 194 sc->sc_wdcdev.sc_atac.atac_free_hw = &free_hw; 195 sc->sc_chanlist[0] = &sc->sc_channel; 196 sc->sc_wdcdev.sc_atac.atac_channels = sc->sc_chanlist; 197 sc->sc_wdcdev.sc_atac.atac_nchannels = 1; 198 sc->sc_wdcdev.wdc_maxdrives = 2; 199 sc->sc_channel.ch_channel = 0; 200 sc->sc_channel.ch_atac = &sc->sc_wdcdev.sc_atac; 201 202 wdc_init_shadow_regs(wdr); 203 204 /* 205 * Setup & enable disk related interrupts. 206 */ 207 MFP->mf_ierb |= IB_DINT; 208 MFP->mf_iprb = (uint8_t)~IB_DINT; 209 MFP->mf_imrb |= IB_DINT; 210 211 wdcattach(&sc->sc_channel); 212 } 213 214 /* 215 * Hardware locking 216 */ 217 static int wd_lock; 218 219 static int 220 claim_hw(struct ata_channel *chp, int maysleep) 221 { 222 ata_channel_lock_owned(chp); 223 224 if (wd_lock != DMA_LOCK_GRANT) { 225 if (wd_lock == DMA_LOCK_REQ) { 226 /* 227 * ST_DMA access is being claimed. 228 */ 229 return 0; 230 } 231 if (!st_dmagrab((dma_farg)wdcintr, 232 (dma_farg)(maysleep ? NULL : wdcrestart), chp, 233 &wd_lock, 1, &chp->ch_lock)) 234 return 0; 235 } 236 return 1; 237 } 238 239 static void 240 free_hw(struct ata_channel *chp) 241 { 242 ata_channel_lock_owned(chp); 243 244 /* 245 * Flush pending interrupts before giving-up lock 246 */ 247 MFP->mf_iprb = (uint8_t)~IB_DINT; 248 249 /* 250 * Only free the lock on a Falcon. On the Hades, keep it. 251 */ 252 /* if (machineid & ATARI_FALCON) */ 253 st_dmafree(chp, &wd_lock); 254 } 255 256 /* 257 * XXX 258 * This piece of uglyness is caused by the fact that the byte lanes of 259 * the data-register are swapped on the atari. This works OK for an IDE 260 * disk, but turns into a nightmare when used on atapi devices. 261 */ 262 #define calc_addr(base, off, stride, wm) \ 263 ((u_long)(base) + ((off) << (stride)) + (wm)) 264 265 static void 266 read_multi_2_swap(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, 267 uint16_t *a, bus_size_t c) 268 { 269 volatile uint16_t *ba; 270 271 ba = (volatile uint16_t *)calc_addr(h, o, t->stride, t->wo_2); 272 for (; c; a++, c--) 273 *a = bswap16(*ba); 274 } 275 276 static void 277 write_multi_2_swap(bus_space_tag_t t, bus_space_handle_t h, bus_size_t o, 278 const uint16_t *a, bus_size_t c) 279 { 280 volatile uint16_t *ba; 281 282 ba = (volatile uint16_t *)calc_addr(h, o, t->stride, t->wo_2); 283 for (; c; a++, c--) 284 *ba = bswap16(*a); 285 } 286
Indexes created Sat Sep 20 22:09:52 GMT 2025