wdc_mb.c revision 1.16
1/* $NetBSD: wdc_mb.c,v 1.16 2003/12/16 14:07:20 he 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 1.16 2003/12/16 14:07:20 he 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 channel_softc *wdc_chanptr; 76 struct channel_softc wdc_channel; 77 void *sc_ih; 78}; 79 80int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 81void wdc_mb_attach __P((struct device *, struct device *, void *)); 82 83CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc), 84 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 85 86int 87wdc_mb_probe(parent, cfp, aux) 88 struct device *parent; 89 struct cfdata *cfp; 90 void *aux; 91{ 92 static int wdc_matched = 0; 93 struct channel_softc ch; 94 int result = 0; 95 u_char sv_ierb; 96 97 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 98 return 0; 99 if (!atari_realconfig) 100 return 0; 101 102 memset(&ch, 0, sizeof(ch)); 103 104 ch.cmd_iot = ch.ctl_iot = mb_alloc_bus_space_tag(); 105 if (ch.cmd_iot == NULL) 106 return 0; 107 ch.cmd_iot->stride = 2; 108 ch.cmd_iot->wo_1 = 1; 109 110 if (bus_space_map(ch.cmd_iot, 0xfff00000, 0x40, 0, &ch.cmd_baseioh)) 111 return 0; 112 if (bus_space_subregion(ch.cmd_iot, ch.cmd_baseioh, 0x38, 1, 113 &ch.ctl_ioh)) 114 return 0; 115 116 /* 117 * Make sure IDE interrupts are disabled during probing. 118 */ 119 sv_ierb = MFP->mf_ierb; 120 MFP->mf_ierb &= ~IB_DINT; 121 122 /* 123 * Make sure that IDE is turned on on the Falcon. 124 */ 125 if (machineid & ATARI_FALCON) 126 ym2149_ser2(0); 127 128 result = wdcprobe(&ch); 129 130 MFP->mf_ierb = sv_ierb; 131 132 bus_space_unmap(ch.cmd_iot, ch.cmd_baseioh, 0x40); 133 mb_free_bus_space_tag(ch.cmd_iot); 134 135 if (result) 136 wdc_matched = 1; 137 return (result); 138} 139 140void 141wdc_mb_attach(parent, self, aux) 142 struct device *parent, *self; 143 void *aux; 144{ 145 struct wdc_mb_softc *sc = (void *)self; 146 147 printf("\n"); 148 149 sc->wdc_channel.cmd_iot = sc->wdc_channel.ctl_iot = 150 mb_alloc_bus_space_tag(); 151 sc->wdc_channel.cmd_iot->stride = 2; 152 sc->wdc_channel.cmd_iot->wo_1 = 1; 153 sc->wdc_channel.cmd_iot->abs_rms_2 = read_multi_2_swap; 154 sc->wdc_channel.cmd_iot->abs_wms_2 = write_multi_2_swap; 155 if (bus_space_map(sc->wdc_channel.cmd_iot, 0xfff00000, 0x40, 0, 156 &sc->wdc_channel.cmd_baseioh)) { 157 printf("%s: couldn't map registers\n", 158 sc->sc_wdcdev.sc_dev.dv_xname); 159 return; 160 } 161 if (bus_space_subregion(sc->wdc_channel.cmd_iot, 162 sc->wdc_channel.cmd_baseioh, 0x38, 1, &sc->wdc_channel.ctl_ioh)) 163 return; 164 165 /* 166 * Play a nasty trick here. Normally we only manipulate the 167 * interrupt *mask*. However to defeat wd_get_parms(), we 168 * disable the interrupts here using the *enable* register. 169 */ 170 MFP->mf_ierb &= ~IB_DINT; 171 172 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | WDC_CAPABILITY_HWLOCK | 173 WDC_CAPABILITY_ATA_NOSTREAM; 174 sc->sc_wdcdev.PIO_cap = 0; 175 sc->sc_wdcdev.claim_hw = &claim_hw; 176 sc->sc_wdcdev.free_hw = &free_hw; 177 sc->wdc_chanptr = &sc->wdc_channel; 178 sc->sc_wdcdev.channels = &sc->wdc_chanptr; 179 sc->sc_wdcdev.nchannels = 1; 180 sc->wdc_channel.channel = 0; 181 sc->wdc_channel.wdc = &sc->sc_wdcdev; 182 sc->wdc_channel.ch_queue = malloc(sizeof(struct channel_queue), 183 M_DEVBUF, M_NOWAIT); 184 if (sc->wdc_channel.ch_queue == NULL) { 185 printf("%s: can't allocate memory for command queue", 186 sc->sc_wdcdev.sc_dev.dv_xname); 187 return; 188 } 189 190 /* 191 * Setup & enable disk related interrupts. 192 */ 193 MFP->mf_ierb |= IB_DINT; 194 MFP->mf_iprb = (u_int8_t)~IB_DINT; 195 MFP->mf_imrb |= IB_DINT; 196 197 wdcattach(&sc->wdc_channel); 198} 199 200/* 201 * Hardware locking 202 */ 203static int wd_lock; 204 205static int 206claim_hw(softc, maysleep) 207void *softc; 208int maysleep; 209{ 210 if (wd_lock != DMA_LOCK_GRANT) { 211 if (wd_lock == DMA_LOCK_REQ) { 212 /* 213 * ST_DMA access is being claimed. 214 */ 215 return 0; 216 } 217 if (!st_dmagrab((dma_farg)wdcintr, 218 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 219 &wd_lock, 1)) 220 return 0; 221 } 222 return 1; 223} 224 225static void 226free_hw(softc) 227void *softc; 228{ 229 /* 230 * Flush pending interrupts before giving-up lock 231 */ 232 MFP->mf_iprb = (u_int8_t)~IB_DINT; 233 234 /* 235 * Only free the lock on a Falcon. On the Hades, keep it. 236 */ 237/* if (machineid & ATARI_FALCON) */ 238 st_dmafree(softc, &wd_lock); 239} 240 241/* 242 * XXX 243 * This piece of uglyness is caused by the fact that the byte lanes of 244 * the data-register are swapped on the atari. This works OK for an IDE 245 * disk, but turns into a nightmare when used on atapi devices. 246 */ 247#define calc_addr(base, off, stride, wm) \ 248 ((u_long)(base) + ((off) << (stride)) + (wm)) 249 250static void 251read_multi_2_swap(t, h, o, a, c) 252 bus_space_tag_t t; 253 bus_space_handle_t h; 254 bus_size_t o, c; 255 u_int16_t *a; 256{ 257 u_int16_t *ba; 258 259 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 260 for (; c; a++, c--) 261 *a = bswap16(*ba); 262} 263 264static void 265write_multi_2_swap(t, h, o, a, c) 266 bus_space_tag_t t; 267 bus_space_handle_t h; 268 bus_size_t o, c; 269 const u_int16_t *a; 270{ 271 u_int16_t *ba; 272 273 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 274 for (; c; a++, c--) 275 *ba = bswap16(*a); 276} 277