wdc_mb.c revision 1.10
1/* $NetBSD: wdc_mb.c,v 1.10 2002/09/27 20:31:00 thorpej 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/bswap.h> 46#include <machine/cpu.h> 47#include <machine/bus.h> 48#include <machine/iomap.h> 49#include <machine/mfp.h> 50#include <machine/dma.h> 51 52#include <dev/ata/atavar.h> 53#include <dev/ic/wdcvar.h> 54 55#include <m68k/asm_single.h> 56 57#include <atari/dev/ym2149reg.h> 58#include <atari/atari/device.h> 59 60/* 61 * XXX This code currently doesn't even try to allow 32-bit data port use. 62 */ 63static int claim_hw __P((void *, int)); 64static void free_hw __P((void *)); 65static void read_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 66 bus_size_t, u_int16_t *, bus_size_t)); 67static void write_multi_2_swap __P((bus_space_tag_t, bus_space_handle_t, 68 bus_size_t, const u_int16_t *, bus_size_t)); 69 70struct wdc_mb_softc { 71 struct wdc_softc sc_wdcdev; 72 struct channel_softc *wdc_chanptr; 73 struct channel_softc wdc_channel; 74 void *sc_ih; 75}; 76 77int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 78void wdc_mb_attach __P((struct device *, struct device *, void *)); 79 80const struct cfattach wdc_mb_ca = { 81 sizeof(struct wdc_mb_softc), wdc_mb_probe, wdc_mb_attach 82}; 83 84int 85wdc_mb_probe(parent, cfp, aux) 86 struct device *parent; 87 struct cfdata *cfp; 88 void *aux; 89{ 90 static int wdc_matched = 0; 91 struct channel_softc ch; 92 int result = 0; 93 u_char sv_ierb; 94 95 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 96 return 0; 97 if (!atari_realconfig) 98 return 0; 99 100 memset(&ch, 0, sizeof(ch)); 101 102 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 103 if (ch.cmd_iot == NULL) 104 return 0; 105 ch.cmd_iot->stride = 2; 106 ch.cmd_iot->wo_1 = 1; 107 108 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_ioh)) 109 return 0; 110 if (bus_space_subregion(ch.cmd_iot, ch.cmd_ioh, 0x38, 1, &ch.ctl_ioh)) 111 return 0; 112 113 /* 114 * Make sure IDE interrupts are disabled during probing. 115 */ 116 sv_ierb = MFP->mf_ierb; 117 MFP->mf_ierb &= ~IB_DINT; 118 119 /* 120 * Make sure that IDE is turned on on the Falcon. 121 */ 122 if (machineid & ATARI_FALCON) 123 ym2149_ser2(0); 124 125 result = wdcprobe(&ch); 126 127 MFP->mf_ierb = sv_ierb; 128 129 bus_space_unmap(ch.cmd_iot, ch.cmd_ioh, 0x40); 130 mb_free_bus_space_tag(ch.cmd_iot); 131 132 if (result) 133 wdc_matched = 1; 134 return (result); 135} 136 137void 138wdc_mb_attach(parent, self, aux) 139 struct device *parent, *self; 140 void *aux; 141{ 142 struct wdc_mb_softc *sc = (void *)self; 143 144 printf("\n"); 145 146 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 147 mb_alloc_bus_space_tag(); 148 sc->wdc_channel.cmd_iot->stride = 2; 149 sc->wdc_channel.cmd_iot->wo_1 = 1; 150 sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap; 151 sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap; 152 if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0, 153 &sc->wdc_channel.cmd_ioh)) { 154 printf("%s: couldn't map registers\n", 155 sc->sc_wdcdev.sc_dev.dv_xname); 156 return; 157 } 158 if (bus_space_subregion(sc->wdc_channel.cmd_iot, 159 sc->wdc_channel.cmd_ioh, 0x38, 1, &sc->wdc_channel.ctl_ioh)) 160 return; 161 162 /* 163 * Play a nasty trick here. Normally we only manipulate the 164 * interrupt *mask*. However to defeat wd_get_parms(), we 165 * disable the interrupts here using the *enable* register. 166 */ 167 MFP->mf_ierb &= ~IB_DINT; 168 169 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_HWLOCK | 170 WDC_CAPABILITY_ATA_NOSTREAM; 171 sc->sc_wdcdev.PIO_cap = 0; 172 sc->sc_wdcdev.claim_hw = &claim_hw; 173 sc->sc_wdcdev.free_hw = &free_hw; 174 sc->wdc_chanptr = &sc->wdc_channel; 175 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 176 sc->sc_wdcdev.nchannels = 1; 177 sc->wdc_channel.channel = 0; 178 sc->wdc_channel.wdc = &sc->sc_wdcdev; 179 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 180 M_DEVBUF, M_NOWAIT); 181 if (sc->wdc_channel.ch_queue == NULL) { 182 printf("%s: can't allocate memory for command queue", 183 sc->sc_wdcdev.sc_dev.dv_xname); 184 return; 185 } 186 wdcattach(&sc->wdc_channel); 187 188 /* 189 * Setup & enable disk related interrupts. 190 */ 191 MFP->mf_ierb |= IB_DINT; 192 MFP->mf_iprb = (u_int8_t)~IB_DINT; 193 MFP->mf_imrb |= IB_DINT; 194} 195 196/* 197 * Hardware locking 198 */ 199static int wd_lock; 200 201static int 202claim_hw(softc, maysleep) 203void *softc; 204int maysleep; 205{ 206 if (wd_lock != DMA_LOCK_GRANT) { 207 if (wd_lock == DMA_LOCK_REQ) { 208 /* 209 * ST_DMA access is being claimed. 210 */ 211 return 0; 212 } 213 if (!st_dmagrab((dma_farg)wdcintr, 214 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 215 &wd_lock, 1)) 216 return 0; 217 } 218 return 1; 219} 220 221static void 222free_hw(softc) 223void *softc; 224{ 225 /* 226 * Flush pending interrupts before giving-up lock 227 */ 228 MFP->mf_iprb = (u_int8_t)~IB_DINT; 229 230 /* 231 * Only free the lock on a Falcon. On the Hades, keep it. 232 */ 233/* if (machineid & ATARI_FALCON) */ 234 st_dmafree(softc, &wd_lock); 235} 236 237/* 238 * XXX 239 * This piece of uglyness is caused by the fact that the byte lanes of 240 * the data-register are swapped on the atari. This works OK for an IDE 241 * disk, but turns into a nightmare when used on atapi devices. 242 */ 243#define calc_addr(base, off, stride, wm) \ 244 ((u_long)(base) + ((off) << (stride)) + (wm)) 245 246static void 247read_multi_2_swap(t, h, o, a, c) 248 bus_space_tag_t t; 249 bus_space_handle_t h; 250 bus_size_t o, c; 251 u_int16_t *a; 252{ 253 u_int16_t *ba; 254 255 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 256 for (; c; a++, c--) 257 *a = bswap16(*ba); 258} 259 260static void 261write_multi_2_swap(t, h, o, a, c) 262 bus_space_tag_t t; 263 bus_space_handle_t h; 264 bus_size_t o, c; 265 const u_int16_t *a; 266{ 267 u_int16_t *ba; 268 269 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 270 for (; c; a++, c--) 271 *ba = bswap16(*a); 272} 273