ld_sdmmc.c revision 1.25
1 /* $NetBSD: ld_sdmmc.c,v 1.25 2017/01/07 16:24:40 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2008 KIYOHARA Takashi 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 19 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 25 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 * 28 */ 29 30 #include <sys/cdefs.h> 31 __KERNEL_RCSID(0, "$NetBSD: ld_sdmmc.c,v 1.25 2017/01/07 16:24:40 martin Exp $"); 32 33 #ifdef _KERNEL_OPT 34 #include "opt_sdmmc.h" 35 #endif 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/device.h> 41 #include <sys/buf.h> 42 #include <sys/bufq.h> 43 #include <sys/bus.h> 44 #include <sys/endian.h> 45 #include <sys/dkio.h> 46 #include <sys/disk.h> 47 #include <sys/disklabel.h> 48 #include <sys/kthread.h> 49 #include <sys/syslog.h> 50 #include <sys/module.h> 51 52 #include <dev/ldvar.h> 53 54 #include <dev/sdmmc/sdmmcvar.h> 55 56 #include "ioconf.h" 57 58 #ifdef LD_SDMMC_DEBUG 59 #define DPRINTF(s) printf s 60 #else 61 #define DPRINTF(s) /**/ 62 #endif 63 64 #define LD_SDMMC_IORETRIES 5 /* number of retries before giving up */ 65 #define RECOVERYTIME hz/2 /* time to wait before retrying a cmd */ 66 67 struct ld_sdmmc_softc; 68 69 struct ld_sdmmc_task { 70 struct sdmmc_task task; 71 72 struct ld_sdmmc_softc *task_sc; 73 struct buf *task_bp; 74 int task_retries; /* number of xfer retry */ 75 struct callout task_restart_ch; 76 }; 77 78 struct ld_sdmmc_softc { 79 struct ld_softc sc_ld; 80 int sc_hwunit; 81 82 struct sdmmc_function *sc_sf; 83 #define LD_SDMMC_MAXQUEUECNT 4 84 struct ld_sdmmc_task sc_task[LD_SDMMC_MAXQUEUECNT]; 85 TAILQ_HEAD(, sdmmc_task) sc_freeq; 86 }; 87 88 static int ld_sdmmc_match(device_t, cfdata_t, void *); 89 static void ld_sdmmc_attach(device_t, device_t, void *); 90 static int ld_sdmmc_detach(device_t, int); 91 92 static int ld_sdmmc_dump(struct ld_softc *, void *, int, int); 93 static int ld_sdmmc_start(struct ld_softc *, struct buf *); 94 static void ld_sdmmc_restart(void *); 95 96 static void ld_sdmmc_doattach(void *); 97 static void ld_sdmmc_dobio(void *); 98 99 CFATTACH_DECL_NEW(ld_sdmmc, sizeof(struct ld_sdmmc_softc), 100 ld_sdmmc_match, ld_sdmmc_attach, ld_sdmmc_detach, NULL); 101 102 103 /* ARGSUSED */ 104 static int 105 ld_sdmmc_match(device_t parent, cfdata_t match, void *aux) 106 { 107 struct sdmmc_softc *sdmsc = device_private(parent); 108 109 if (ISSET(sdmsc->sc_flags, SMF_MEM_MODE)) 110 return 1; 111 return 0; 112 } 113 114 /* ARGSUSED */ 115 static void 116 ld_sdmmc_attach(device_t parent, device_t self, void *aux) 117 { 118 struct ld_sdmmc_softc *sc = device_private(self); 119 struct sdmmc_attach_args *sa = aux; 120 struct ld_softc *ld = &sc->sc_ld; 121 struct ld_sdmmc_task *task; 122 struct lwp *lwp; 123 int i; 124 125 ld->sc_dv = self; 126 127 aprint_normal(": <0x%02x:0x%04x:%s:0x%02x:0x%08x:0x%03x>\n", 128 sa->sf->cid.mid, sa->sf->cid.oid, sa->sf->cid.pnm, 129 sa->sf->cid.rev, sa->sf->cid.psn, sa->sf->cid.mdt); 130 aprint_naive("\n"); 131 132 TAILQ_INIT(&sc->sc_freeq); 133 for (i = 0; i < __arraycount(sc->sc_task); i++) { 134 task = &sc->sc_task[i]; 135 task->task_sc = sc; 136 callout_init(&task->task_restart_ch, 0); 137 TAILQ_INSERT_TAIL(&sc->sc_freeq, &task->task, next); 138 } 139 140 sc->sc_hwunit = 0; /* always 0? */ 141 sc->sc_sf = sa->sf; 142 143 ld->sc_flags = LDF_ENABLED; 144 ld->sc_secperunit = sc->sc_sf->csd.capacity; 145 ld->sc_secsize = SDMMC_SECTOR_SIZE; 146 ld->sc_maxxfer = MAXPHYS; 147 ld->sc_maxqueuecnt = LD_SDMMC_MAXQUEUECNT; 148 ld->sc_dump = ld_sdmmc_dump; 149 ld->sc_start = ld_sdmmc_start; 150 151 /* 152 * It is avoided that the error occurs when the card attaches it, 153 * when wedge is supported. 154 */ 155 config_pending_incr(self); 156 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 157 ld_sdmmc_doattach, sc, &lwp, "%sattach", device_xname(self))) { 158 aprint_error_dev(self, "couldn't create thread\n"); 159 } 160 } 161 162 static void 163 ld_sdmmc_doattach(void *arg) 164 { 165 struct ld_sdmmc_softc *sc = (struct ld_sdmmc_softc *)arg; 166 struct ld_softc *ld = &sc->sc_ld; 167 struct sdmmc_softc *ssc = device_private(device_parent(ld->sc_dv)); 168 169 ldattach(ld, BUFQ_DISK_DEFAULT_STRAT); 170 aprint_normal_dev(ld->sc_dv, "%d-bit width,", sc->sc_sf->width); 171 if (ssc->sc_transfer_mode != NULL) 172 aprint_normal(" %s,", ssc->sc_transfer_mode); 173 if ((ssc->sc_busclk / 1000) != 0) 174 aprint_normal(" %u.%03u MHz\n", 175 ssc->sc_busclk / 1000, ssc->sc_busclk % 1000); 176 else 177 aprint_normal(" %u KHz\n", ssc->sc_busclk % 1000); 178 config_pending_decr(ld->sc_dv); 179 kthread_exit(0); 180 } 181 182 static int 183 ld_sdmmc_detach(device_t dev, int flags) 184 { 185 struct ld_sdmmc_softc *sc = device_private(dev); 186 struct ld_softc *ld = &sc->sc_ld; 187 int rv, i; 188 189 if ((rv = ldbegindetach(ld, flags)) != 0) 190 return rv; 191 ldenddetach(ld); 192 193 for (i = 0; i < __arraycount(sc->sc_task); i++) 194 callout_destroy(&sc->sc_task[i].task_restart_ch); 195 196 return 0; 197 } 198 199 static int 200 ld_sdmmc_start(struct ld_softc *ld, struct buf *bp) 201 { 202 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 203 struct ld_sdmmc_task *task = (void *)TAILQ_FIRST(&sc->sc_freeq); 204 205 TAILQ_REMOVE(&sc->sc_freeq, &task->task, next); 206 207 task->task_bp = bp; 208 task->task_retries = 0; 209 sdmmc_init_task(&task->task, ld_sdmmc_dobio, task); 210 211 sdmmc_add_task(sc->sc_sf->sc, &task->task); 212 213 return 0; 214 } 215 216 static void 217 ld_sdmmc_restart(void *arg) 218 { 219 struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg; 220 struct ld_sdmmc_softc *sc = task->task_sc; 221 struct buf *bp = task->task_bp; 222 223 bp->b_resid = bp->b_bcount; 224 225 sdmmc_add_task(sc->sc_sf->sc, &task->task); 226 } 227 228 static void 229 ld_sdmmc_dobio(void *arg) 230 { 231 struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg; 232 struct ld_sdmmc_softc *sc = task->task_sc; 233 struct buf *bp = task->task_bp; 234 int error; 235 236 /* 237 * I/O operation 238 */ 239 DPRINTF(("%s: I/O operation (dir=%s, blkno=0x%jx, bcnt=0x%x)\n", 240 device_xname(sc->sc_ld.sc_dv), bp->b_flags & B_READ ? "IN" : "OUT", 241 bp->b_rawblkno, bp->b_bcount)); 242 243 /* is everything done in terms of blocks? */ 244 if (bp->b_rawblkno >= sc->sc_sf->csd.capacity) { 245 /* trying to read or write past end of device */ 246 aprint_error_dev(sc->sc_ld.sc_dv, 247 "blkno 0x%" PRIu64 " exceeds capacity %d\n", 248 bp->b_rawblkno, sc->sc_sf->csd.capacity); 249 bp->b_error = EINVAL; 250 bp->b_resid = bp->b_bcount; 251 lddone(&sc->sc_ld, bp); 252 return; 253 } 254 255 if (bp->b_flags & B_READ) 256 error = sdmmc_mem_read_block(sc->sc_sf, bp->b_rawblkno, 257 bp->b_data, bp->b_bcount); 258 else 259 error = sdmmc_mem_write_block(sc->sc_sf, bp->b_rawblkno, 260 bp->b_data, bp->b_bcount); 261 if (error) { 262 if (task->task_retries < LD_SDMMC_IORETRIES) { 263 struct dk_softc *dksc = &sc->sc_ld.sc_dksc; 264 struct cfdriver *cd = device_cfdriver(dksc->sc_dev); 265 266 diskerr(bp, cd->cd_name, "error", LOG_PRINTF, 0, 267 dksc->sc_dkdev.dk_label); 268 printf(", retrying\n"); 269 task->task_retries++; 270 callout_reset(&task->task_restart_ch, RECOVERYTIME, 271 ld_sdmmc_restart, task); 272 return; 273 } 274 bp->b_error = error; 275 bp->b_resid = bp->b_bcount; 276 } else { 277 bp->b_resid = 0; 278 } 279 280 TAILQ_INSERT_TAIL(&sc->sc_freeq, &task->task, next); 281 282 lddone(&sc->sc_ld, bp); 283 } 284 285 static int 286 ld_sdmmc_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 287 { 288 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 289 290 return sdmmc_mem_write_block(sc->sc_sf, blkno, data, 291 blkcnt * ld->sc_secsize); 292 } 293 294 MODULE(MODULE_CLASS_DRIVER, ld_sdmmc, "ld"); 295 296 #ifdef _MODULE 297 /* 298 * XXX Don't allow ioconf.c to redefine the "struct cfdriver ld_cd" 299 * XXX it will be defined in the common-code module 300 */ 301 #undef CFDRIVER_DECL 302 #define CFDRIVER_DECL(name, class, attr) 303 #include "ioconf.c" 304 #endif 305 306 static int 307 ld_sdmmc_modcmd(modcmd_t cmd, void *opaque) 308 { 309 #ifdef _MODULE 310 /* 311 * We ignore the cfdriver_vec[] that ioconf provides, since 312 * the cfdrivers are attached already. 313 */ 314 static struct cfdriver * const no_cfdriver_vec[] = { NULL }; 315 #endif 316 int error = 0; 317 318 #ifdef _MODULE 319 switch (cmd) { 320 case MODULE_CMD_INIT: 321 error = config_init_component(no_cfdriver_vec, 322 cfattach_ioconf_ld_sdmmc, cfdata_ioconf_ld_sdmmc); 323 break; 324 case MODULE_CMD_FINI: 325 error = config_fini_component(no_cfdriver_vec, 326 cfattach_ioconf_ld_sdmmc, cfdata_ioconf_ld_sdmmc); 327 break; 328 default: 329 error = ENOTTY; 330 break; 331 } 332 #endif 333 334 return error; 335 } 336
Indexes created Thu Sep 25 16:09:42 GMT 2025