1 /* $NetBSD: ld_sdmmc.c,v 1.21 2015/08/28 06:04:43 mlelstv 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 1.21 2015/08/28 06:04:43 mlelstv 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/kthread.h> 48 49 #include <dev/ldvar.h> 50 51 #include <dev/sdmmc/sdmmcvar.h> 52 53 #ifdef LD_SDMMC_DEBUG 54 #define DPRINTF(s) printf s 55 #else 56 #define DPRINTF(s) /**/ 57 #endif 58 59 struct ld_sdmmc_softc; 60 61 struct ld_sdmmc_task { 62 struct sdmmc_task task; 63 64 struct ld_sdmmc_softc *task_sc; 65 struct buf *task_bp; 66 }; 67 68 struct ld_sdmmc_softc { 69 struct ld_softc sc_ld; 70 int sc_hwunit; 71 72 struct sdmmc_function *sc_sf; 73 #define LD_SDMMC_MAXQUEUECNT 4 74 struct ld_sdmmc_task sc_task[LD_SDMMC_MAXQUEUECNT]; 75 int sc_nexttask; 76 }; 77 78 static int ld_sdmmc_match(device_t, cfdata_t, void *); 79 static void ld_sdmmc_attach(device_t, device_t, void *); 80 static int ld_sdmmc_detach(device_t, int); 81 82 static int ld_sdmmc_dump(struct ld_softc *, void *, int, int); 83 static int ld_sdmmc_start(struct ld_softc *, struct buf *); 84 85 static void ld_sdmmc_doattach(void *); 86 static void ld_sdmmc_dobio(void *); 87 88 CFATTACH_DECL_NEW(ld_sdmmc, sizeof(struct ld_sdmmc_softc), 89 ld_sdmmc_match, ld_sdmmc_attach, ld_sdmmc_detach, NULL); 90 91 92 /* ARGSUSED */ 93 static int 94 ld_sdmmc_match(device_t parent, cfdata_t match, void *aux) 95 { 96 struct sdmmc_softc *sdmsc = device_private(parent); 97 98 if (ISSET(sdmsc->sc_flags, SMF_MEM_MODE)) 99 return 1; 100 return 0; 101 } 102 103 /* ARGSUSED */ 104 static void 105 ld_sdmmc_attach(device_t parent, device_t self, void *aux) 106 { 107 struct ld_sdmmc_softc *sc = device_private(self); 108 struct sdmmc_attach_args *sa = aux; 109 struct ld_softc *ld = &sc->sc_ld; 110 struct lwp *lwp; 111 112 ld->sc_dv = self; 113 114 aprint_normal(": <0x%02x:0x%04x:%s:0x%02x:0x%08x:0x%03x>\n", 115 sa->sf->cid.mid, sa->sf->cid.oid, sa->sf->cid.pnm, 116 sa->sf->cid.rev, sa->sf->cid.psn, sa->sf->cid.mdt); 117 aprint_naive("\n"); 118 119 sc->sc_nexttask = 0; 120 121 sc->sc_hwunit = 0; /* always 0? */ 122 sc->sc_sf = sa->sf; 123 124 ld->sc_flags = LDF_ENABLED; 125 ld->sc_secperunit = sc->sc_sf->csd.capacity; 126 ld->sc_secsize = SDMMC_SECTOR_SIZE; 127 ld->sc_maxxfer = MAXPHYS; 128 ld->sc_maxqueuecnt = LD_SDMMC_MAXQUEUECNT; 129 ld->sc_dump = ld_sdmmc_dump; 130 ld->sc_start = ld_sdmmc_start; 131 132 /* 133 * It is avoided that the error occurs when the card attaches it, 134 * when wedge is supported. 135 */ 136 config_pending_incr(self); 137 if (kthread_create(PRI_NONE, KTHREAD_MPSAFE, NULL, 138 ld_sdmmc_doattach, sc, &lwp, "%sattach", device_xname(self))) { 139 aprint_error_dev(self, "couldn't create thread\n"); 140 } 141 } 142 143 static void 144 ld_sdmmc_doattach(void *arg) 145 { 146 struct ld_sdmmc_softc *sc = (struct ld_sdmmc_softc *)arg; 147 struct ld_softc *ld = &sc->sc_ld; 148 struct sdmmc_softc *ssc = device_private(device_parent(ld->sc_dv)); 149 150 ldattach(ld); 151 aprint_normal_dev(ld->sc_dv, "%d-bit width,", sc->sc_sf->width); 152 if (ssc->sc_transfer_mode != NULL) 153 aprint_normal(" %s,", ssc->sc_transfer_mode); 154 if ((ssc->sc_busclk / 1000) != 0) 155 aprint_normal(" %u.%03u MHz\n", 156 ssc->sc_busclk / 1000, ssc->sc_busclk % 1000); 157 else 158 aprint_normal(" %u KHz\n", ssc->sc_busclk % 1000); 159 config_pending_decr(ld->sc_dv); 160 kthread_exit(0); 161 } 162 163 static int 164 ld_sdmmc_detach(device_t dev, int flags) 165 { 166 struct ld_sdmmc_softc *sc = device_private(dev); 167 struct ld_softc *ld = &sc->sc_ld; 168 int rv; 169 170 if ((rv = ldbegindetach(ld, flags)) != 0) 171 return rv; 172 ldenddetach(ld); 173 174 return 0; 175 } 176 177 static int 178 ld_sdmmc_start(struct ld_softc *ld, struct buf *bp) 179 { 180 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 181 struct ld_sdmmc_task *task = &sc->sc_task[sc->sc_nexttask]; 182 183 sc->sc_nexttask = (sc->sc_nexttask + 1) % LD_SDMMC_MAXQUEUECNT; 184 185 task->task_sc = sc; 186 task->task_bp = bp; 187 sdmmc_init_task(&task->task, ld_sdmmc_dobio, task); 188 189 sdmmc_add_task(sc->sc_sf->sc, &task->task); 190 191 return 0; 192 } 193 194 static void 195 ld_sdmmc_dobio(void *arg) 196 { 197 struct ld_sdmmc_task *task = (struct ld_sdmmc_task *)arg; 198 struct ld_sdmmc_softc *sc = task->task_sc; 199 struct buf *bp = task->task_bp; 200 int error; 201 202 /* 203 * I/O operation 204 */ 205 DPRINTF(("%s: I/O operation (dir=%s, blkno=0x%jx, bcnt=0x%x)\n", 206 device_xname(sc->sc_ld.sc_dv), bp->b_flags & B_READ ? "IN" : "OUT", 207 bp->b_rawblkno, bp->b_bcount)); 208 209 /* is everything done in terms of blocks? */ 210 if (bp->b_rawblkno >= sc->sc_sf->csd.capacity) { 211 /* trying to read or write past end of device */ 212 aprint_error_dev(sc->sc_ld.sc_dv, 213 "blkno 0x%" PRIu64 " exceeds capacity %d\n", 214 bp->b_rawblkno, sc->sc_sf->csd.capacity); 215 bp->b_error = EINVAL; 216 bp->b_resid = bp->b_bcount; 217 lddone(&sc->sc_ld, bp); 218 return; 219 } 220 221 if (bp->b_flags & B_READ) 222 error = sdmmc_mem_read_block(sc->sc_sf, bp->b_rawblkno, 223 bp->b_data, bp->b_bcount); 224 else 225 error = sdmmc_mem_write_block(sc->sc_sf, bp->b_rawblkno, 226 bp->b_data, bp->b_bcount); 227 if (error) { 228 DPRINTF(("%s: error %d\n", device_xname(sc->sc_ld.sc_dv), 229 error)); 230 bp->b_error = error; 231 bp->b_resid = bp->b_bcount; 232 } else { 233 bp->b_resid = 0; 234 } 235 236 lddone(&sc->sc_ld, bp); 237 } 238 239 static int 240 ld_sdmmc_dump(struct ld_softc *ld, void *data, int blkno, int blkcnt) 241 { 242 struct ld_sdmmc_softc *sc = device_private(ld->sc_dv); 243 244 return sdmmc_mem_write_block(sc->sc_sf, blkno, data, 245 blkcnt * ld->sc_secsize); 246 } 247