wdc_mb.c revision 1.23
1/* $NetBSD: wdc_mb.c,v 1.23 2004/08/14 15:08:04 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 1.23 2004/08/14 15:08:04 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 ata_channel *sc_chanlist[1]; 76 struct ata_channel sc_channel; 77 struct ata_queue sc_chqueue; 78 struct wdc_regs sc_wdc_regs; 79 void *sc_ih; 80}; 81 82int wdc_mb_probe __P((struct device *, struct cfdata *, void *)); 83void wdc_mb_attach __P((struct device *, struct device *, void *)); 84 85CFATTACH_DECL(wdc_mb, sizeof(struct wdc_mb_softc), 86 wdc_mb_probe, wdc_mb_attach, NULL, NULL); 87 88int 89wdc_mb_probe(parent, cfp, aux) 90 struct device *parent; 91 struct cfdata *cfp; 92 void *aux; 93{ 94 static int wdc_matched = 0; 95 struct ata_channel ch; 96 struct wdc_softc wdc; 97 struct wdc_regs wdr; 98 int result = 0; 99 u_char sv_ierb; 100 101 if ((machineid & ATARI_TT) || strcmp("wdc", aux) || wdc_matched) 102 return 0; 103 if (!atari_realconfig) 104 return 0; 105 106 memset(&wdc, 0, sizeof(wdc)); 107 memset(&ch, 0, sizeof(ch)); 108 ch.ch_wdc = &wdc; 109 wdc.regs = &wdr; 110 111 wdr.cmd_iot = wdr.ctl_iot = mb_alloc_bus_space_tag(); 112 if (wdr.cmd_iot == NULL) 113 return 0; 114 wdr.cmd_iot->stride = 2; 115 wdr.cmd_iot->wo_1 = 1; 116 117 if (bus_space_map(wdr.cmd_iot, 0xfff00000, 0x40, 0, &wdr.cmd_baseioh)) 118 return 0; 119 if (bus_space_subregion(wdr.cmd_iot, wdr.cmd_baseioh, 0x38, 1, 120 &wdr.ctl_ioh)) 121 return 0; 122 123 /* 124 * Make sure IDE interrupts are disabled during probing. 125 */ 126 sv_ierb = MFP->mf_ierb; 127 MFP->mf_ierb &= ~IB_DINT; 128 129 /* 130 * Make sure that IDE is turned on on the Falcon. 131 */ 132 if (machineid & ATARI_FALCON) 133 ym2149_ser2(0); 134 135 result = wdcprobe(&ch); 136 137 MFP->mf_ierb = sv_ierb; 138 139 bus_space_unmap(wdr.cmd_iot, wdr.cmd_baseioh, 0x40); 140 mb_free_bus_space_tag(wdr.cmd_iot); 141 142 if (result) 143 wdc_matched = 1; 144 return (result); 145} 146 147void 148wdc_mb_attach(parent, self, aux) 149 struct device *parent, *self; 150 void *aux; 151{ 152 struct wdc_mb_softc *sc = (void *)self; 153 struct wdc_regs *wdr; 154 155 printf("\n"); 156 157 sc->sc_wdcdev.regs = wdr = &sc->sc_wdc_regs; 158 wdr->cmd_iot = wdr->ctl_iot = 159 mb_alloc_bus_space_tag(); 160 wdr->cmd_iot->stride = 2; 161 wdr->cmd_iot->wo_1 = 1; 162 wdr->cmd_iot->abs_rms_2 = read_multi_2_swap; 163 wdr->cmd_iot->abs_wms_2 = write_multi_2_swap; 164 if (bus_space_map(wdr->cmd_iot, 0xfff00000, 0x40, 0, 165 &wdr->cmd_baseioh)) { 166 printf("%s: couldn't map registers\n", 167 sc->sc_wdcdev.sc_dev.dv_xname); 168 return; 169 } 170 if (bus_space_subregion(wdr->cmd_iot, 171 wdr->cmd_baseioh, 0x38, 1, &wdr->ctl_ioh)) 172 return; 173 174 /* 175 * Play a nasty trick here. Normally we only manipulate the 176 * interrupt *mask*. However to defeat wd_get_parms(), we 177 * disable the interrupts here using the *enable* register. 178 */ 179 MFP->mf_ierb &= ~IB_DINT; 180 181 sc->sc_wdcdev.cap |= WDC_CAPABILITY_DATA16 | 182 WDC_CAPABILITY_ATA_NOSTREAM; 183 sc->sc_wdcdev.PIO_cap = 0; 184 sc->sc_wdcdev.claim_hw = &claim_hw; 185 sc->sc_wdcdev.free_hw = &free_hw; 186 sc->sc_chanlist[0] = &sc->sc_channel; 187 sc->sc_wdcdev.channels = sc->sc_chanlist; 188 sc->sc_wdcdev.nchannels = 1; 189 sc->sc_channel.ch_channel = 0; 190 sc->sc_channel.ch_wdc = &sc->sc_wdcdev; 191 sc->sc_channel.ch_queue = &sc->sc_chqueue; 192 193 /* 194 * Setup & enable disk related interrupts. 195 */ 196 MFP->mf_ierb |= IB_DINT; 197 MFP->mf_iprb = (u_int8_t)~IB_DINT; 198 MFP->mf_imrb |= IB_DINT; 199 200 wdcattach(&sc->sc_channel); 201} 202 203/* 204 * Hardware locking 205 */ 206static int wd_lock; 207 208static int 209claim_hw(softc, maysleep) 210void *softc; 211int maysleep; 212{ 213 if (wd_lock != DMA_LOCK_GRANT) { 214 if (wd_lock == DMA_LOCK_REQ) { 215 /* 216 * ST_DMA access is being claimed. 217 */ 218 return 0; 219 } 220 if (!st_dmagrab((dma_farg)wdcintr, 221 (dma_farg)(maysleep ? NULL : wdcrestart), softc, 222 &wd_lock, 1)) 223 return 0; 224 } 225 return 1; 226} 227 228static void 229free_hw(softc) 230void *softc; 231{ 232 /* 233 * Flush pending interrupts before giving-up lock 234 */ 235 MFP->mf_iprb = (u_int8_t)~IB_DINT; 236 237 /* 238 * Only free the lock on a Falcon. On the Hades, keep it. 239 */ 240/* if (machineid & ATARI_FALCON) */ 241 st_dmafree(softc, &wd_lock); 242} 243 244/* 245 * XXX 246 * This piece of uglyness is caused by the fact that the byte lanes of 247 * the data-register are swapped on the atari. This works OK for an IDE 248 * disk, but turns into a nightmare when used on atapi devices. 249 */ 250#define calc_addr(base, off, stride, wm) \ 251 ((u_long)(base) + ((off) << (stride)) + (wm)) 252 253static void 254read_multi_2_swap(t, h, o, a, c) 255 bus_space_tag_t t; 256 bus_space_handle_t h; 257 bus_size_t o, c; 258 u_int16_t *a; 259{ 260 u_int16_t *ba; 261 262 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 263 for (; c; a++, c--) 264 *a = bswap16(*ba); 265} 266 267static void 268write_multi_2_swap(t, h, o, a, c) 269 bus_space_tag_t t; 270 bus_space_handle_t h; 271 bus_size_t o, c; 272 const u_int16_t *a; 273{ 274 u_int16_t *ba; 275 276 ba = (u_int16_t *)calc_addr(h, o, t->stride, t->wo_2); 277 for (; c; a++, c--) 278 *ba = bswap16(*a); 279} 280