wdc_mb.c revision 1.22
1/* $NetBSD: wdc_mb.c,v 1.22 2004/08/13 03:12:59 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 * 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 1.22 2004/08/13 03:12:59 thorpej 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 <machine/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/* 64 * XXX This code currently doesn't even try to allow 32-bit data port use. 65 */ 66static int claim_hw __P((void *, int)); 67static void free_hw __P((void *)); 68static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 69 bus_size_t, u_int16_t *, bus_size_t)); 70static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 71 bus_size_t, const u_int16_t *, bus_size_t)); 72 73struct wdc_mb_softc { 74 struct wdc_softc sc_wdcdev; 75 struct wdc_channel *wdc_chanlist[1]; 76 struct wdc_channel wdc_channel; 77 struct ata_queue wdc_chqueue; 78 void *sc_ih; 79}; 80 81int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 82void wdc_mb_attach __P((struct device *, struct device *, void *)); 83 84CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc), 85 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 86 87int 88wdc_mb_probe(parent, cfp, aux) 89 struct device *parent; 90 struct cfdata *cfp; 91 void *aux; 92{ 93 static int wdc_matched = 0; 94 struct wdc_channel ch; 95 int result = 0; 96 u_char sv_ierb; 97 98 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 99 return 0; 100 if (!atari_realconfig) 101 return 0; 102 103 memset(&ch, 0, sizeof(ch)); 104 105 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 106 if (ch.cmd_iot == NULL) 107 return 0; 108 ch.cmd_iot->stride = 2; 109 ch.cmd_iot->wo_1 = 1; 110 111 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_baseioh)) 112 return 0; 113 if (bus_space_subregion(ch.cmd_iot, ch.cmd_baseioh, 0x38, 1, 114 &ch.ctl_ioh)) 115 return 0; 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(&ch); 130 131 MFP->mf_ierb = sv_ierb; 132 133 bus_space_unmap(ch.cmd_iot, ch.cmd_baseioh, 0x40); 134 mb_free_bus_space_tag(ch.cmd_iot); 135 136 if (result) 137 wdc_matched = 1; 138 return (result); 139} 140 141void 142wdc_mb_attach(parent, self, aux) 143 struct device *parent, *self; 144 void *aux; 145{ 146 struct wdc_mb_softc *sc = (void *)self; 147 148 printf("\n"); 149 150 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 151 mb_alloc_bus_space_tag(); 152 sc->wdc_channel.cmd_iot->stride = 2; 153 sc->wdc_channel.cmd_iot->wo_1 = 1; 154 sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap; 155 sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap; 156 if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0, 157 &sc->wdc_channel.cmd_baseioh)) { 158 printf("%s: couldn't map registers\n", 159 sc->sc_wdcdev.sc_dev.dv_xname); 160 return; 161 } 162 if (bus_space_subregion(sc->wdc_channel.cmd_iot, 163 sc->wdc_channel.cmd_baseioh, 0x38, 1, &sc->wdc_channel.ctl_ioh)) 164 return; 165 166 /* 167 * Play a nasty trick here. Normally we only manipulate the 168 * interrupt *mask*. However to defeat wd_get_parms(), we 169 * disable the interrupts here using the *enable* register. 170 */ 171 MFP->mf_ierb &= ~IB_DINT; 172 173 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | 174 WDC_CAPABILITY_ATA_NOSTREAM; 175 sc->sc_wdcdev.PIO_cap = 0; 176 sc->sc_wdcdev.claim_hw = &claim_hw; 177 sc->sc_wdcdev.free_hw = &free_hw; 178 sc->wdc_chanlist[0] = &sc->wdc_channel; 179 sc->sc_wdcdev.channels = sc->wdc_chanlist; 180 sc->sc_wdcdev.nchannels = 1; 181 sc->wdc_channel.ch_channel = 0; 182 sc->wdc_channel.ch_wdc = &sc->sc_wdcdev; 183 sc->wdc_channel.ch_queue = &sc->wdc_chqueue; 184 185 /* 186 * Setup & enable disk related interrupts. 187 */ 188 MFP->mf_ierb |= IB_DINT; 189 MFP->mf_iprb = (u_int8_t)~IB_DINT; 190 MFP->mf_imrb |= IB_DINT; 191 192 wdcattach(&sc->wdc_channel); 193} 194 195/* 196 * Hardware locking 197 */ 198static int wd_lock; 199 200static int 201claim_hw(softc, maysleep) 202void *softc; 203int maysleep; 204{ 205 if (wd_lock != DMA_LOCK_GRANT) { 206 if (wd_lock == DMA_LOCK_REQ) { 207 /* 208 * ST_DMA access is being claimed. 209 */ 210 return 0; 211 } 212 if (!st_dmagrab((dma_farg)wdcintr, 213 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 214 &wd_lock, 1)) 215 return 0; 216 } 217 return 1; 218} 219 220static void 221free_hw(softc) 222void *softc; 223{ 224 /* 225 * Flush pending interrupts before giving-up lock 226 */ 227 MFP->mf_iprb = (u_int8_t)~IB_DINT; 228 229 /* 230 * Only free the lock on a Falcon. On the Hades, keep it. 231 */ 232/* if (machineid & ATARI_FALCON) */ 233 st_dmafree(softc, &wd_lock); 234} 235 236/* 237 * XXX 238 * This piece of uglyness is caused by the fact that the byte lanes of 239 * the data-register are swapped on the atari. This works OK for an IDE 240 * disk, but turns into a nightmare when used on atapi devices. 241 */ 242#define calc_addr(base, off, stride, wm) \ 243 ((u_long)(base) + ((off) << (stride)) + (wm)) 244 245static void 246read_multi_2_swap(t, h, o, a, c) 247 bus_space_tag_t t; 248 bus_space_handle_t h; 249 bus_size_t o, c; 250 u_int16_t *a; 251{ 252 u_int16_t *ba; 253 254 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 255 for (; c; a++, c--) 256 *a = bswap16(*ba); 257} 258 259static void 260write_multi_2_swap(t, h, o, a, c) 261 bus_space_tag_t t; 262 bus_space_handle_t h; 263 bus_size_t o, c; 264 const u_int16_t *a; 265{ 266 u_int16_t *ba; 267 268 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 269 for (; c; a++, c--) 270 *ba = bswap16(*a); 271} 272