mmc.c revision 183446
1163516Simp/*- 2163516Simp * Copyright (c) 2006 Bernd Walter. All rights reserved. 3163516Simp * Copyright (c) 2006 M. Warner Losh. All rights reserved. 4163516Simp * 5163516Simp * Redistribution and use in source and binary forms, with or without 6163516Simp * modification, are permitted provided that the following conditions 7163516Simp * are met: 8163516Simp * 1. Redistributions of source code must retain the above copyright 9163516Simp * notice, this list of conditions and the following disclaimer. 10163516Simp * 2. Redistributions in binary form must reproduce the above copyright 11163516Simp * notice, this list of conditions and the following disclaimer in the 12163516Simp * documentation and/or other materials provided with the distribution. 13163516Simp * 14163516Simp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 15163516Simp * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16163516Simp * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17163516Simp * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18163516Simp * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19163516Simp * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20163516Simp * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21163516Simp * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22163516Simp * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23163516Simp * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24170002Simp * 25170002Simp * Portions of this software may have been developed with reference to 26170002Simp * the SD Simplified Specification. The following disclaimer may apply: 27170002Simp * 28170002Simp * The following conditions apply to the release of the simplified 29170002Simp * specification ("Simplified Specification") by the SD Card Association and 30170002Simp * the SD Group. The Simplified Specification is a subset of the complete SD 31170002Simp * Specification which is owned by the SD Card Association and the SD 32170002Simp * Group. This Simplified Specification is provided on a non-confidential 33170002Simp * basis subject to the disclaimers below. Any implementation of the 34170002Simp * Simplified Specification may require a license from the SD Card 35170002Simp * Association, SD Group, SD-3C LLC or other third parties. 36170002Simp * 37170002Simp * Disclaimers: 38170002Simp * 39170002Simp * The information contained in the Simplified Specification is presented only 40170002Simp * as a standard specification for SD Cards and SD Host/Ancillary products and 41170002Simp * is provided "AS-IS" without any representations or warranties of any 42170002Simp * kind. No responsibility is assumed by the SD Group, SD-3C LLC or the SD 43170002Simp * Card Association for any damages, any infringements of patents or other 44170002Simp * right of the SD Group, SD-3C LLC, the SD Card Association or any third 45170002Simp * parties, which may result from its use. No license is granted by 46170002Simp * implication, estoppel or otherwise under any patent or other rights of the 47170002Simp * SD Group, SD-3C LLC, the SD Card Association or any third party. Nothing 48170002Simp * herein shall be construed as an obligation by the SD Group, the SD-3C LLC 49170002Simp * or the SD Card Association to disclose or distribute any technical 50170002Simp * information, know-how or other confidential information to any third party. 51163516Simp */ 52163516Simp 53163516Simp#include <sys/cdefs.h> 54163516Simp__FBSDID("$FreeBSD: head/sys/dev/mmc/mmc.c 183446 2008-09-28 22:27:29Z imp $"); 55163516Simp 56163516Simp#include <sys/param.h> 57163516Simp#include <sys/systm.h> 58163516Simp#include <sys/kernel.h> 59163516Simp#include <sys/malloc.h> 60163516Simp#include <sys/lock.h> 61163516Simp#include <sys/module.h> 62163516Simp#include <sys/mutex.h> 63163516Simp#include <sys/bus.h> 64163516Simp 65163516Simp#include <dev/mmc/mmcreg.h> 66163516Simp#include <dev/mmc/mmcbrvar.h> 67163516Simp#include <dev/mmc/mmcvar.h> 68163516Simp#include "mmcbr_if.h" 69163516Simp#include "mmcbus_if.h" 70163516Simp 71163516Simpstruct mmc_softc { 72163516Simp device_t dev; 73163516Simp struct mtx sc_mtx; 74163516Simp struct intr_config_hook config_intrhook; 75163516Simp device_t owner; 76163516Simp uint32_t last_rca; 77163516Simp}; 78163516Simp 79163516Simp/* 80163516Simp * Per-card data 81163516Simp */ 82163516Simpstruct mmc_ivars { 83163516Simp uint32_t raw_cid[4]; /* Raw bits of the CID */ 84163516Simp uint32_t raw_csd[4]; /* Raw bits of the CSD */ 85163516Simp uint16_t rca; 86163516Simp enum mmc_card_mode mode; 87163516Simp struct mmc_cid cid; /* cid decoded */ 88163516Simp struct mmc_csd csd; /* csd decoded */ 89163516Simp}; 90163516Simp 91163516Simp#define CMD_RETRIES 3 92163516Simp 93163516Simp/* bus entry points */ 94163516Simpstatic int mmc_probe(device_t dev); 95163516Simpstatic int mmc_attach(device_t dev); 96163516Simpstatic int mmc_detach(device_t dev); 97163516Simp 98163516Simp#define MMC_LOCK(_sc) mtx_lock(&(_sc)->sc_mtx) 99163516Simp#define MMC_UNLOCK(_sc) mtx_unlock(&(_sc)->sc_mtx) 100183444Simp#define MMC_LOCK_INIT(_sc) \ 101183444Simp mtx_init(&_sc->sc_mtx, device_get_nameunit(_sc->dev), \ 102163516Simp "mmc", MTX_DEF) 103163516Simp#define MMC_LOCK_DESTROY(_sc) mtx_destroy(&_sc->sc_mtx); 104163516Simp#define MMC_ASSERT_LOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_OWNED); 105163516Simp#define MMC_ASSERT_UNLOCKED(_sc) mtx_assert(&_sc->sc_mtx, MA_NOTOWNED); 106163516Simp 107163516Simpstatic void mmc_delayed_attach(void *); 108163516Simpstatic int mmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, 109163516Simp int retries); 110163516Simpstatic int mmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 111163516Simp uint32_t arg, uint32_t flags, uint32_t *resp, int retries); 112163516Simp 113163516Simpstatic void 114163516Simpmmc_ms_delay(int ms) 115163516Simp{ 116163516Simp DELAY(1000 * ms); /* XXX BAD */ 117163516Simp} 118163516Simp 119163516Simpstatic int 120163516Simpmmc_probe(device_t dev) 121163516Simp{ 122163516Simp 123183445Simp device_set_desc(dev, "MMC/SD bus"); 124163516Simp return (0); 125163516Simp} 126163516Simp 127163516Simpstatic int 128163516Simpmmc_attach(device_t dev) 129163516Simp{ 130163516Simp struct mmc_softc *sc; 131163516Simp 132163516Simp sc = device_get_softc(dev); 133163516Simp sc->dev = dev; 134163516Simp MMC_LOCK_INIT(sc); 135163516Simp 136163516Simp /* We'll probe and attach our children later, but before / mount */ 137163516Simp sc->config_intrhook.ich_func = mmc_delayed_attach; 138163516Simp sc->config_intrhook.ich_arg = sc; 139163516Simp if (config_intrhook_establish(&sc->config_intrhook) != 0) 140163516Simp device_printf(dev, "config_intrhook_establish failed\n"); 141163516Simp return (0); 142163516Simp} 143163516Simp 144163516Simpstatic int 145163516Simpmmc_detach(device_t dev) 146163516Simp{ 147169567Simp struct mmc_softc *sc = device_get_softc(dev); 148169567Simp device_t *kids; 149169567Simp int i, nkid; 150169567Simp 151169567Simp /* kill children [ph33r]. -sorbo */ 152169567Simp if (device_get_children(sc->dev, &kids, &nkid) != 0) 153169567Simp return 0; 154169567Simp for (i = 0; i < nkid; i++) { 155169567Simp device_t kid = kids[i]; 156169567Simp void *ivar = device_get_ivars(kid); 157169567Simp 158169567Simp device_detach(kid); 159169567Simp device_delete_child(sc->dev, kid); 160169567Simp free(ivar, M_DEVBUF); 161169567Simp } 162169567Simp free(kids, M_TEMP); 163169567Simp 164169567Simp MMC_LOCK_DESTROY(sc); 165169567Simp 166169567Simp return 0; 167163516Simp} 168163516Simp 169163516Simpstatic int 170163516Simpmmc_acquire_bus(device_t busdev, device_t dev) 171163516Simp{ 172163516Simp struct mmc_softc *sc; 173163516Simp int err; 174163516Simp int rca; 175163516Simp 176163516Simp err = MMCBR_ACQUIRE_HOST(device_get_parent(busdev), dev); 177163516Simp if (err) 178163516Simp return (err); 179163516Simp sc = device_get_softc(busdev); 180163516Simp MMC_LOCK(sc); 181163516Simp if (sc->owner) 182163516Simp panic("mmc: host bridge didn't seralize us."); 183163516Simp sc->owner = dev; 184163516Simp MMC_UNLOCK(sc); 185163516Simp 186163516Simp if (busdev != dev) { 187163516Simp // Keep track of the last rca that we've selected. If 188163516Simp // we're asked to do it again, don't. We never unselect 189163516Simp // unless the bus code itself wants the mmc bus. 190163516Simp rca = mmc_get_rca(dev); 191163516Simp if (sc->last_rca != rca) { 192163516Simp mmc_wait_for_command(sc, MMC_SELECT_CARD, rca << 16, 193163516Simp MMC_RSP_R1 | MMC_CMD_AC, NULL, CMD_RETRIES); 194163516Simp sc->last_rca = rca; 195163516Simp } 196163516Simp // XXX should set bus width here? 197163516Simp } else { 198163516Simp // If there's a card selected, stand down. 199163516Simp if (sc->last_rca != 0) { 200163516Simp mmc_wait_for_command(sc, MMC_SELECT_CARD, 0, 201163516Simp MMC_RSP_R1 | MMC_CMD_AC, NULL, CMD_RETRIES); 202163516Simp sc->last_rca = 0; 203163516Simp } 204163516Simp // XXX should set bus width here? 205163516Simp } 206163516Simp 207163516Simp return (0); 208163516Simp} 209163516Simp 210163516Simpstatic int 211163516Simpmmc_release_bus(device_t busdev, device_t dev) 212163516Simp{ 213163516Simp struct mmc_softc *sc; 214163516Simp int err; 215163516Simp 216163516Simp sc = device_get_softc(busdev); 217163516Simp 218163516Simp MMC_LOCK(sc); 219163516Simp if (!sc->owner) 220163516Simp panic("mmc: releasing unowned bus."); 221163516Simp if (sc->owner != dev) 222163516Simp panic("mmc: you don't own the bus. game over."); 223163516Simp MMC_UNLOCK(sc); 224163516Simp err = MMCBR_RELEASE_HOST(device_get_parent(busdev), dev); 225163516Simp if (err) 226163516Simp return (err); 227163516Simp MMC_LOCK(sc); 228163516Simp sc->owner = NULL; 229163516Simp MMC_UNLOCK(sc); 230163516Simp return (0); 231163516Simp} 232163516Simp 233163516Simpstatic void 234163516Simpmmc_rescan_cards(struct mmc_softc *sc) 235163516Simp{ 236163516Simp /* XXX: Look at the children and see if they respond to status */ 237163516Simp} 238163516Simp 239163516Simpstatic uint32_t 240163516Simpmmc_select_vdd(struct mmc_softc *sc, uint32_t ocr) 241163516Simp{ 242183446Simp 243183446Simp return ocr & MMC_OCR_VOLTAGE; 244163516Simp} 245163516Simp 246163516Simpstatic int 247163516Simpmmc_highest_voltage(uint32_t ocr) 248163516Simp{ 249163516Simp int i; 250163516Simp 251163516Simp for (i = 30; i >= 0; i--) 252163516Simp if (ocr & (1 << i)) 253163516Simp return i; 254163516Simp return (-1); 255163516Simp} 256163516Simp 257163516Simpstatic void 258163516Simpmmc_wakeup(struct mmc_request *req) 259163516Simp{ 260163516Simp struct mmc_softc *sc; 261163516Simp 262163516Simp// printf("Wakeup for req %p done_data %p\n", req, req->done_data); 263163516Simp sc = (struct mmc_softc *)req->done_data; 264163516Simp MMC_LOCK(sc); 265163516Simp req->flags |= MMC_REQ_DONE; 266163516Simp wakeup(req); 267163516Simp MMC_UNLOCK(sc); 268163516Simp} 269163516Simp 270163516Simpstatic int 271163516Simpmmc_wait_for_req(struct mmc_softc *sc, struct mmc_request *req) 272163516Simp{ 273163516Simp int err; 274163516Simp 275163516Simp req->done = mmc_wakeup; 276163516Simp req->done_data = sc; 277163516Simp// printf("Submitting request %p sc %p\n", req, sc); 278163516Simp MMCBR_REQUEST(device_get_parent(sc->dev), sc->dev, req); 279163516Simp MMC_LOCK(sc); 280163516Simp do { 281163516Simp err = msleep(req, &sc->sc_mtx, PZERO | PCATCH, "mmcreq", 282163516Simp hz / 10); 283163516Simp } while (!(req->flags & MMC_REQ_DONE) && err == EAGAIN); 284163516Simp// printf("Request %p done with error %d\n", req, err); 285163516Simp MMC_UNLOCK(sc); 286163516Simp return (err); 287163516Simp} 288163516Simp 289163516Simpstatic int 290163516Simpmmc_wait_for_request(device_t brdev, device_t reqdev, struct mmc_request *req) 291163516Simp{ 292163516Simp struct mmc_softc *sc = device_get_softc(brdev); 293163516Simp 294163516Simp return mmc_wait_for_req(sc, req); 295163516Simp} 296163516Simp 297163516Simpstatic int 298163516Simpmmc_wait_for_cmd(struct mmc_softc *sc, struct mmc_command *cmd, int retries) 299163516Simp{ 300163516Simp struct mmc_request mreq; 301163516Simp 302163516Simp memset(&mreq, 0, sizeof(mreq)); 303163516Simp memset(cmd->resp, 0, sizeof(cmd->resp)); 304163516Simp cmd->retries = retries; 305163516Simp cmd->data = NULL; 306163516Simp mreq.cmd = cmd; 307163516Simp// printf("CMD: %x ARG %x\n", cmd->opcode, cmd->arg); 308163516Simp mmc_wait_for_req(sc, &mreq); 309163516Simp return (cmd->error); 310163516Simp} 311163516Simp 312163516Simpstatic int 313163516Simpmmc_wait_for_app_cmd(struct mmc_softc *sc, uint32_t rca, 314163516Simp struct mmc_command *cmd, int retries) 315163516Simp{ 316163516Simp struct mmc_command appcmd; 317163516Simp int err = MMC_ERR_NONE, i; 318163516Simp 319163516Simp for (i = 0; i <= retries; i++) { 320163516Simp appcmd.opcode = MMC_APP_CMD; 321163516Simp appcmd.arg = rca << 16; 322163516Simp appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC; 323163516Simp mmc_wait_for_cmd(sc, &appcmd, 0); 324163516Simp err = appcmd.error; 325163516Simp if (err != MMC_ERR_NONE) 326163516Simp continue; 327163516Simp if (!(appcmd.resp[0] & R1_APP_CMD)) 328163516Simp return MMC_ERR_FAILED; 329163516Simp mmc_wait_for_cmd(sc, cmd, 0); 330163516Simp err = cmd->error; 331163516Simp if (err == MMC_ERR_NONE) 332163516Simp break; 333163516Simp } 334163516Simp return (err); 335163516Simp} 336163516Simp 337163516Simpstatic int 338163516Simpmmc_wait_for_command(struct mmc_softc *sc, uint32_t opcode, 339163516Simp uint32_t arg, uint32_t flags, uint32_t *resp, int retries) 340163516Simp{ 341163516Simp struct mmc_command cmd; 342163516Simp int err; 343163516Simp 344163516Simp memset(&cmd, 0, sizeof(cmd)); 345163516Simp cmd.opcode = opcode; 346163516Simp cmd.arg = arg; 347163516Simp cmd.flags = flags; 348163516Simp err = mmc_wait_for_cmd(sc, &cmd, retries); 349163516Simp if (err) 350163516Simp return (err); 351163516Simp if (cmd.error) 352163516Simp return (cmd.error); 353163516Simp if (resp) { 354163516Simp if (flags & MMC_RSP_136) 355163516Simp memcpy(resp, cmd.resp, 4 * sizeof(uint32_t)); 356163516Simp else 357163516Simp *resp = cmd.resp[0]; 358163516Simp } 359163516Simp return (0); 360163516Simp} 361163516Simp 362163516Simpstatic void 363163516Simpmmc_idle_cards(struct mmc_softc *sc) 364163516Simp{ 365163516Simp device_t dev; 366163516Simp struct mmc_command cmd; 367163516Simp 368163516Simp dev = sc->dev; 369163516Simp mmcbr_set_chip_select(dev, cs_high); 370163516Simp mmcbr_update_ios(dev); 371163516Simp mmc_ms_delay(1); 372163516Simp 373163516Simp memset(&cmd, 0, sizeof(cmd)); 374163516Simp cmd.opcode = MMC_GO_IDLE_STATE; 375163516Simp cmd.arg = 0; 376163516Simp cmd.flags = MMC_RSP_NONE | MMC_CMD_BC; 377163516Simp mmc_wait_for_cmd(sc, &cmd, 0); 378163516Simp mmc_ms_delay(1); 379163516Simp 380163516Simp mmcbr_set_chip_select(dev, cs_dontcare); 381163516Simp mmcbr_update_ios(dev); 382163516Simp mmc_ms_delay(1); 383163516Simp} 384163516Simp 385163516Simpstatic int 386163516Simpmmc_send_app_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 387163516Simp{ 388163516Simp struct mmc_command cmd; 389163516Simp int err = MMC_ERR_NONE, i; 390163516Simp 391163516Simp memset(&cmd, 0, sizeof(cmd)); 392163516Simp cmd.opcode = ACMD_SD_SEND_OP_COND; 393163516Simp cmd.arg = ocr; 394163516Simp cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 395163516Simp 396170337Simp for (i = 0; i < 100; i++) { 397163516Simp err = mmc_wait_for_app_cmd(sc, 0, &cmd, CMD_RETRIES); 398163516Simp if (err != MMC_ERR_NONE) 399163516Simp break; 400163516Simp if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || ocr == 0) 401163516Simp break; 402163516Simp err = MMC_ERR_TIMEOUT; 403163516Simp mmc_ms_delay(10); 404163516Simp } 405163516Simp if (rocr && err == MMC_ERR_NONE) 406163516Simp *rocr = cmd.resp[0]; 407163516Simp return err; 408163516Simp} 409163516Simp 410163516Simpstatic int 411163516Simpmmc_send_op_cond(struct mmc_softc *sc, uint32_t ocr, uint32_t *rocr) 412163516Simp{ 413163516Simp struct mmc_command cmd; 414163516Simp int err = MMC_ERR_NONE, i; 415163516Simp 416163516Simp memset(&cmd, 0, sizeof(cmd)); 417163516Simp cmd.opcode = MMC_SEND_OP_COND; 418163516Simp cmd.arg = ocr; 419163516Simp cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR; 420163516Simp 421163516Simp for (i = 0; i < 100; i++) { 422163516Simp err = mmc_wait_for_cmd(sc, &cmd, CMD_RETRIES); 423163516Simp if (err != MMC_ERR_NONE) 424163516Simp break; 425163516Simp if ((cmd.resp[0] & MMC_OCR_CARD_BUSY) || ocr == 0) 426163516Simp break; 427163516Simp err = MMC_ERR_TIMEOUT; 428163516Simp mmc_ms_delay(10); 429163516Simp } 430163516Simp if (rocr && err == MMC_ERR_NONE) 431163516Simp *rocr = cmd.resp[0]; 432163516Simp return err; 433163516Simp} 434163516Simp 435163516Simpstatic void 436163516Simpmmc_power_up(struct mmc_softc *sc) 437163516Simp{ 438163516Simp device_t dev; 439163516Simp 440163516Simp dev = sc->dev; 441163516Simp mmcbr_set_vdd(dev, mmc_highest_voltage(mmcbr_get_host_ocr(dev))); 442163516Simp mmcbr_set_bus_mode(dev, opendrain); 443163516Simp mmcbr_set_chip_select(dev, cs_dontcare); 444163516Simp mmcbr_set_bus_width(dev, bus_width_1); 445163516Simp mmcbr_set_power_mode(dev, power_up); 446163516Simp mmcbr_set_clock(dev, 0); 447163516Simp mmcbr_update_ios(dev); 448163516Simp mmc_ms_delay(1); 449163516Simp 450163516Simp mmcbr_set_clock(dev, mmcbr_get_f_min(sc->dev)); 451163516Simp mmcbr_set_power_mode(dev, power_on); 452163516Simp mmcbr_update_ios(dev); 453163516Simp mmc_ms_delay(2); 454163516Simp} 455163516Simp 456163516Simp// I wonder if the following is endian safe. 457163516Simpstatic uint32_t 458163516Simpmmc_get_bits(uint32_t *bits, int start, int size) 459163516Simp{ 460163516Simp const int i = 3 - (start / 32); 461163516Simp const int shift = start & 31; 462163516Simp uint32_t retval = bits[i] >> shift; 463163516Simp if (size + shift > 32) 464163516Simp retval |= bits[i - 1] << (32 - shift); 465163516Simp return retval & ((1 << size) - 1); 466163516Simp} 467163516Simp 468163516Simpstatic void 469163516Simpmmc_decode_cid(int is_sd, uint32_t *raw_cid, struct mmc_cid *cid) 470163516Simp{ 471163516Simp int i; 472163516Simp 473163516Simp memset(cid, 0, sizeof(*cid)); 474163516Simp if (is_sd) { 475163516Simp /* There's no version info, so we take it on faith */ 476163516Simp cid->mid = mmc_get_bits(raw_cid, 120, 8); 477163516Simp cid->oid = mmc_get_bits(raw_cid, 104, 16); 478163516Simp for (i = 0; i < 5; i++) 479163516Simp cid->pnm[i] = mmc_get_bits(raw_cid, 96 - i * 8, 8); 480163516Simp cid->prv = mmc_get_bits(raw_cid, 56, 8); 481163516Simp cid->psn = mmc_get_bits(raw_cid, 24, 32); 482163516Simp cid->mdt_year = mmc_get_bits(raw_cid, 12, 8) + 2001; 483163516Simp cid->mdt_month = mmc_get_bits(raw_cid, 8, 4); 484163516Simp } else { 485163516Simp // XXX write me 486163516Simp panic("write mmc cid decoder"); 487163516Simp } 488163516Simp} 489163516Simp 490163516Simpstatic const int exp[8] = { 491163516Simp 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 492163516Simp}; 493163516Simpstatic const int mant[16] = { 494163516Simp 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 495163516Simp}; 496163516Simpstatic const int cur_min[8] = { 497163516Simp 500, 1000, 5000, 10000, 25000, 35000, 60000, 100000 498163516Simp}; 499163516Simpstatic const int cur_max[8] = { 500163516Simp 1000, 5000, 10000, 25000, 35000, 45000, 800000, 200000 501163516Simp}; 502163516Simp 503163516Simpstatic void 504163516Simpmmc_decode_csd(int is_sd, uint32_t *raw_csd, struct mmc_csd *csd) 505163516Simp{ 506163516Simp int v; 507163516Simp int m; 508163516Simp int e; 509163516Simp 510163516Simp memset(csd, 0, sizeof(*csd)); 511163516Simp if (is_sd) { 512163516Simp csd->csd_structure = v = mmc_get_bits(raw_csd, 126, 2); 513163516Simp if (v == 0) { 514163516Simp m = mmc_get_bits(raw_csd, 115, 4); 515163516Simp e = mmc_get_bits(raw_csd, 112, 3); 516163516Simp csd->tacc = exp[e] * mant[m] + 9 / 10; 517163516Simp csd->nsac = mmc_get_bits(raw_csd, 104, 8) * 100; 518163516Simp m = mmc_get_bits(raw_csd, 99, 4); 519163516Simp e = mmc_get_bits(raw_csd, 96, 3); 520163516Simp csd->tran_speed = exp[e] * 10000 * mant[m]; 521163516Simp csd->ccc = mmc_get_bits(raw_csd, 84, 12); 522163516Simp csd->read_bl_len = 1 << mmc_get_bits(raw_csd, 80, 4); 523163516Simp csd->read_bl_partial = mmc_get_bits(raw_csd, 79, 1); 524163516Simp csd->write_blk_misalign = mmc_get_bits(raw_csd, 78, 1); 525163516Simp csd->read_blk_misalign = mmc_get_bits(raw_csd, 77, 1); 526163516Simp csd->dsr_imp = mmc_get_bits(raw_csd, 76, 1); 527163516Simp csd->vdd_r_curr_min = cur_min[mmc_get_bits(raw_csd, 59, 3)]; 528163516Simp csd->vdd_r_curr_max = cur_max[mmc_get_bits(raw_csd, 56, 3)]; 529163516Simp csd->vdd_w_curr_min = cur_min[mmc_get_bits(raw_csd, 53, 3)]; 530163516Simp csd->vdd_w_curr_max = cur_max[mmc_get_bits(raw_csd, 50, 3)]; 531163516Simp m = mmc_get_bits(raw_csd, 62, 12); 532163516Simp e = mmc_get_bits(raw_csd, 47, 3); 533163516Simp csd->capacity = ((1 + m) << (e + 2)) * csd->read_bl_len; 534163516Simp csd->erase_blk_en = mmc_get_bits(raw_csd, 46, 1); 535163516Simp csd->sector_size = mmc_get_bits(raw_csd, 39, 7); 536163516Simp csd->wp_grp_size = mmc_get_bits(raw_csd, 32, 7); 537163516Simp csd->wp_grp_enable = mmc_get_bits(raw_csd, 31, 1); 538163516Simp csd->r2w_factor = 1 << mmc_get_bits(raw_csd, 26, 3); 539163516Simp csd->write_bl_len = 1 << mmc_get_bits(raw_csd, 22, 4); 540163516Simp csd->write_bl_partial = mmc_get_bits(raw_csd, 21, 1); 541163516Simp } else if (v == 1) { 542163516Simp panic("Write SDHC CSD parser"); 543163516Simp } else 544163516Simp panic("unknown SD CSD version"); 545163516Simp } else { 546163516Simp panic("Write a MMC CSD parser"); 547163516Simp } 548163516Simp} 549163516Simp 550163516Simpstatic int 551163516Simpmmc_all_send_cid(struct mmc_softc *sc, uint32_t *rawcid) 552163516Simp{ 553163516Simp struct mmc_command cmd; 554163516Simp int err; 555163516Simp 556163516Simp cmd.opcode = MMC_ALL_SEND_CID; 557163516Simp cmd.arg = 0; 558163516Simp cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 559163516Simp err = mmc_wait_for_cmd(sc, &cmd, 0); 560163516Simp memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 561163516Simp return (err); 562163516Simp} 563163516Simp 564163516Simpstatic int 565163516Simpmmc_send_csd(struct mmc_softc *sc, uint16_t rca, uint32_t *rawcid) 566163516Simp{ 567163516Simp struct mmc_command cmd; 568163516Simp int err; 569163516Simp 570163516Simp cmd.opcode = MMC_SEND_CSD; 571163516Simp cmd.arg = rca << 16; 572163516Simp cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR; 573163516Simp err = mmc_wait_for_cmd(sc, &cmd, 0); 574163516Simp memcpy(rawcid, cmd.resp, 4 * sizeof(uint32_t)); 575163516Simp return (err); 576163516Simp} 577163516Simp 578163516Simpstatic int 579163516Simpmmc_send_relative_addr(struct mmc_softc *sc, uint32_t *resp) 580163516Simp{ 581163516Simp struct mmc_command cmd; 582163516Simp int err; 583163516Simp 584163516Simp cmd.opcode = SD_SEND_RELATIVE_ADDR; 585163516Simp cmd.arg = 0; 586163516Simp cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR; 587163516Simp err = mmc_wait_for_cmd(sc, &cmd, 0); 588163516Simp *resp = cmd.resp[0]; 589163516Simp return (err); 590163516Simp} 591163516Simp 592163516Simpstatic void 593163516Simpmmc_discover_cards(struct mmc_softc *sc) 594163516Simp{ 595163516Simp struct mmc_ivars *ivar; 596163516Simp int err; 597163516Simp uint32_t resp; 598163516Simp device_t child; 599163516Simp 600163516Simp while (1) { 601163516Simp ivar = malloc(sizeof(struct mmc_ivars), M_DEVBUF, M_WAITOK); 602169567Simp if (!ivar) 603169567Simp return; 604163516Simp err = mmc_all_send_cid(sc, ivar->raw_cid); 605163516Simp if (err == MMC_ERR_TIMEOUT) 606163516Simp break; 607163516Simp if (err != MMC_ERR_NONE) { 608163516Simp printf("Error reading CID %d\n", err); 609163516Simp break; 610163516Simp } 611163516Simp if (mmcbr_get_mode(sc->dev) == mode_sd) { 612163516Simp ivar->mode = mode_sd; 613163516Simp mmc_decode_cid(1, ivar->raw_cid, &ivar->cid); 614163516Simp mmc_send_relative_addr(sc, &resp); 615163516Simp ivar->rca = resp >> 16; 616163516Simp // RO check 617163516Simp mmc_send_csd(sc, ivar->rca, ivar->raw_csd); 618163516Simp mmc_decode_csd(1, ivar->raw_csd, &ivar->csd); 619169567Simp printf("SD CARD: %lld bytes\n", (long long) 620169567Simp ivar->csd.capacity); 621163516Simp child = device_add_child(sc->dev, NULL, -1); 622163516Simp device_set_ivars(child, ivar); 623169567Simp return; 624163516Simp } 625163516Simp panic("Write MMC card code here"); 626163516Simp } 627169567Simp free(ivar, M_DEVBUF); 628163516Simp} 629163516Simp 630163516Simpstatic void 631163516Simpmmc_go_discovery(struct mmc_softc *sc) 632163516Simp{ 633163516Simp uint32_t ocr; 634163516Simp device_t dev; 635163516Simp 636163516Simp dev = sc->dev; 637163516Simp if (mmcbr_get_power_mode(dev) != power_on) { 638163516Simp // First, try SD modes 639163516Simp mmcbr_set_mode(dev, mode_sd); 640163516Simp mmc_power_up(sc); 641163516Simp mmcbr_set_bus_mode(dev, pushpull); 642163516Simp mmc_idle_cards(sc); 643163516Simp if (mmc_send_app_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) { 644163516Simp // Failed, try MMC 645163516Simp mmcbr_set_mode(dev, mode_mmc); 646163516Simp if (mmc_send_op_cond(sc, 0, &ocr) != MMC_ERR_NONE) 647163516Simp return; // Failed both, punt! XXX power down? 648163516Simp } 649163516Simp mmcbr_set_ocr(dev, mmc_select_vdd(sc, ocr)); 650163516Simp if (mmcbr_get_ocr(dev) != 0) 651163516Simp mmc_idle_cards(sc); 652163516Simp } else { 653163516Simp mmcbr_set_bus_mode(dev, opendrain); 654163516Simp mmcbr_set_clock(dev, mmcbr_get_f_min(dev)); 655163516Simp mmcbr_update_ios(dev); 656163516Simp // XXX recompute vdd based on new cards? 657163516Simp } 658163516Simp /* 659163516Simp * Make sure that we have a mutually agreeable voltage to at least 660163516Simp * one card on the bus. 661163516Simp */ 662163516Simp if (mmcbr_get_ocr(dev) == 0) 663163516Simp return; 664163516Simp /* 665163516Simp * Reselect the cards after we've idled them above. 666163516Simp */ 667163516Simp if (mmcbr_get_mode(dev) == mode_sd) 668163516Simp mmc_send_app_op_cond(sc, mmcbr_get_ocr(dev), NULL); 669163516Simp else 670163516Simp mmc_send_op_cond(sc, mmcbr_get_ocr(dev), NULL); 671163516Simp mmc_discover_cards(sc); 672163516Simp 673163516Simp mmcbr_set_bus_mode(dev, pushpull); 674163516Simp mmcbr_update_ios(dev); 675163516Simp bus_generic_attach(dev); 676163516Simp// mmc_update_children_sysctl(dev); 677163516Simp} 678163516Simp 679163516Simpstatic int 680163516Simpmmc_calculate_clock(struct mmc_softc *sc) 681163516Simp{ 682163516Simp int max_dtr = 0; 683163516Simp int nkid, i, f_min, f_max; 684163516Simp device_t *kids; 685163516Simp 686163516Simp f_min = mmcbr_get_f_min(sc->dev); 687163516Simp f_max = mmcbr_get_f_max(sc->dev); 688163516Simp max_dtr = f_max; 689163516Simp if (device_get_children(sc->dev, &kids, &nkid) != 0) 690163516Simp panic("can't get children"); 691163516Simp for (i = 0; i < nkid; i++) 692163516Simp if (mmc_get_tran_speed(kids[i]) < max_dtr) 693163516Simp max_dtr = mmc_get_tran_speed(kids[i]); 694163516Simp free(kids, M_TEMP); 695163516Simp device_printf(sc->dev, "setting transfer rate to %d.%03dMHz\n", 696163516Simp max_dtr / 1000000, (max_dtr / 1000) % 1000); 697163516Simp return max_dtr; 698163516Simp} 699163516Simp 700163516Simpstatic void 701163516Simpmmc_scan(struct mmc_softc *sc) 702163516Simp{ 703163516Simp device_t dev; 704163516Simp 705163516Simp dev = sc->dev; 706163516Simp mmc_acquire_bus(dev, dev); 707163516Simp 708163516Simp if (mmcbr_get_power_mode(dev) == power_on) 709163516Simp mmc_rescan_cards(sc); 710163516Simp mmc_go_discovery(sc); 711163516Simp mmcbr_set_clock(dev, mmc_calculate_clock(sc)); 712163516Simp mmcbr_update_ios(dev); 713163516Simp 714163516Simp mmc_release_bus(dev, dev); 715163516Simp // XXX probe/attach/detach children? 716163516Simp} 717163516Simp 718163516Simpstatic int 719163516Simpmmc_read_ivar(device_t bus, device_t child, int which, u_char *result) 720163516Simp{ 721163516Simp struct mmc_ivars *ivar = device_get_ivars(child); 722163516Simp 723163516Simp switch (which) { 724163516Simp default: 725163516Simp return (EINVAL); 726163516Simp case MMC_IVAR_DSR_IMP: 727163516Simp *(int *)result = ivar->csd.dsr_imp; 728163516Simp break; 729163516Simp case MMC_IVAR_MEDIA_SIZE: 730163516Simp *(int *)result = ivar->csd.capacity; 731163516Simp break; 732163516Simp case MMC_IVAR_RCA: 733163516Simp *(int *)result = ivar->rca; 734163516Simp break; 735163516Simp case MMC_IVAR_SECTOR_SIZE: 736163516Simp *(int *)result = 512; 737163516Simp break; 738163516Simp case MMC_IVAR_TRAN_SPEED: 739163516Simp *(int *)result = ivar->csd.tran_speed; 740163516Simp break; 741163516Simp } 742163516Simp return (0); 743163516Simp} 744163516Simp 745163516Simpstatic int 746163516Simpmmc_write_ivar(device_t bus, device_t child, int which, uintptr_t value) 747163516Simp{ 748163516Simp // None are writable ATM 749163516Simp switch (which) { 750163516Simp default: 751163516Simp return (EINVAL); 752163516Simp } 753163516Simp return (0); 754163516Simp} 755163516Simp 756163516Simp 757163516Simpstatic void 758163516Simpmmc_delayed_attach(void *xsc) 759163516Simp{ 760163516Simp struct mmc_softc *sc = xsc; 761163516Simp 762163516Simp mmc_scan(sc); 763163516Simp config_intrhook_disestablish(&sc->config_intrhook); 764163516Simp} 765163516Simp 766163516Simpstatic device_method_t mmc_methods[] = { 767163516Simp /* device_if */ 768163516Simp DEVMETHOD(device_probe, mmc_probe), 769163516Simp DEVMETHOD(device_attach, mmc_attach), 770163516Simp DEVMETHOD(device_detach, mmc_detach), 771163516Simp 772163516Simp /* Bus interface */ 773163516Simp DEVMETHOD(bus_read_ivar, mmc_read_ivar), 774163516Simp DEVMETHOD(bus_write_ivar, mmc_write_ivar), 775163516Simp 776163516Simp /* MMC Bus interface */ 777163516Simp DEVMETHOD(mmcbus_wait_for_request, mmc_wait_for_request), 778163516Simp DEVMETHOD(mmcbus_acquire_bus, mmc_acquire_bus), 779163516Simp DEVMETHOD(mmcbus_release_bus, mmc_release_bus), 780163516Simp 781163516Simp {0, 0}, 782163516Simp}; 783163516Simp 784163516Simpstatic driver_t mmc_driver = { 785163516Simp "mmc", 786163516Simp mmc_methods, 787163516Simp sizeof(struct mmc_softc), 788163516Simp}; 789163516Simpstatic devclass_t mmc_devclass; 790163516Simp 791163516Simp 792163516SimpDRIVER_MODULE(mmc, at91_mci, mmc_driver, mmc_devclass, 0, 0); 793169567SimpDRIVER_MODULE(mmc, sdh, mmc_driver, mmc_devclass, 0, 0); 794