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NetBSD/sys/dev/sdmmc/sdmmc_mem.c

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/* $NetBSD: sdmmc_mem.c,v 1.2 2009/05/24 12:59:54 nonaka Exp $ */
/* $OpenBSD: sdmmc_mem.c,v 1.10 2009/01/09 10:55:22 jsg Exp $ */
/*
* Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*-
* Copyright (c) 2007-2009 NONAKA Kimihiro <nonaka@netbsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* Routines for SD/MMC memory cards. */
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: sdmmc_mem.c,v 1.2 2009/05/24 12:59:54 nonaka Exp $");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#include <dev/sdmmc/sdmmcchip.h>
#include <dev/sdmmc/sdmmcreg.h>
#include <dev/sdmmc/sdmmcvar.h>
#ifdef SDMMC_DEBUG
#define DPRINTF(s) do { printf s; } while (/*CONSTCOND*/0)
#else
#define DPRINTF(s) do {} while (/*CONSTCOND*/0)
#endif
static int sdmmc_mem_send_op_cond(struct sdmmc_softc *, uint32_t, uint32_t *);
static int sdmmc_mem_send_if_cond(struct sdmmc_softc *, uint32_t, uint32_t *);
static int sdmmc_mem_set_blocklen(struct sdmmc_softc *,
struct sdmmc_function *);
#ifdef SDMMC_DUMP_CSD
static void sdmmc_print_csd(sdmmc_response, struct sdmmc_csd *);
#endif
static int sdmmc_mem_read_block_subr(struct sdmmc_function *, uint32_t,
u_char *, size_t);
static int sdmmc_mem_write_block_subr(struct sdmmc_function *, uint32_t,
u_char *, size_t);
/*
* Initialize SD/MMC memory cards and memory in SDIO "combo" cards.
*/
int
sdmmc_mem_enable(struct sdmmc_softc *sc)
{
uint32_t host_ocr;
uint32_t card_ocr;
int error;
SDMMC_LOCK(sc);
/* Set host mode to SD "combo" card or SD memory-only. */
SET(sc->sc_flags, SMF_SD_MODE|SMF_MEM_MODE);
/* Reset memory (*must* do that before CMD55 or CMD1). */
sdmmc_go_idle_state(sc);
/*
* Read the SD/MMC memory OCR value by issuing CMD55 followed
* by ACMD41 to read the OCR value from memory-only SD cards.
* MMC cards will not respond to CMD55 or ACMD41 and this is
* how we distinguish them from SD cards.
*/
mmc_mode:
error = sdmmc_mem_send_op_cond(sc, 0, &card_ocr);
if (error) {
if (ISSET(sc->sc_flags, SMF_SD_MODE) &&
!ISSET(sc->sc_flags, SMF_IO_MODE)) {
/* Not a SD card, switch to MMC mode. */
DPRINTF(("%s: switch to MMC mode\n", SDMMCDEVNAME(sc)));
CLR(sc->sc_flags, SMF_SD_MODE);
goto mmc_mode;
}
if (!ISSET(sc->sc_flags, SMF_SD_MODE)) {
DPRINTF(("%s: couldn't read memory OCR\n",
SDMMCDEVNAME(sc)));
goto out;
} else {
/* Not a "combo" card. */
CLR(sc->sc_flags, SMF_MEM_MODE);
error = 0;
goto out;
}
}
/* Set the lowest voltage supported by the card and host. */
host_ocr = sdmmc_chip_host_ocr(sc->sc_sct, sc->sc_sch);
error = sdmmc_set_bus_power(sc, host_ocr, card_ocr);
if (error) {
DPRINTF(("%s: couldn't supply voltage requested by card\n",
SDMMCDEVNAME(sc)));
goto out;
}
/* Tell the card(s) to enter the idle state (again). */
sdmmc_go_idle_state(sc);
error = sdmmc_mem_send_if_cond(sc, 0x1aa, &card_ocr);
if (error == 0 && card_ocr == 0x1aa)
SET(host_ocr, MMC_OCR_HCS);
/* Send the new OCR value until all cards are ready. */
error = sdmmc_mem_send_op_cond(sc, host_ocr, NULL);
if (error) {
DPRINTF(("%s: couldn't send memory OCR\n", SDMMCDEVNAME(sc)));
goto out;
}
out:
SDMMC_UNLOCK(sc);
return error;
}
/*
* Read the CSD and CID from all cards and assign each card a unique
* relative card address (RCA). CMD2 is ignored by SDIO-only cards.
*/
void
sdmmc_mem_scan(struct sdmmc_softc *sc)
{
struct sdmmc_command cmd;
struct sdmmc_function *sf;
uint16_t next_rca;
int error;
int retry;
SDMMC_LOCK(sc);
/*
* CMD2 is a broadcast command understood by SD cards and MMC
* cards. All cards begin to respond to the command, but back
* off if another card drives the CMD line to a different level.
* Only one card will get its entire response through. That
* card remains silent once it has been assigned a RCA.
*/
for (retry = 0; retry < 100; retry++) {
memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_ALL_SEND_CID;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R2;
error = sdmmc_mmc_command(sc, &cmd);
if (error == ETIMEDOUT) {
/* No more cards there. */
break;
} else if (error) {
DPRINTF(("%s: couldn't read CID\n", SDMMCDEVNAME(sc)));
break;
}
/* In MMC mode, find the next available RCA. */
next_rca = 1;
if (!ISSET(sc->sc_flags, SMF_SD_MODE)) {
SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list)
next_rca++;
}
/* Allocate a sdmmc_function structure. */
sf = sdmmc_function_alloc(sc);
sf->rca = next_rca;
/*
* Remember the CID returned in the CMD2 response for
* later decoding.
*/
memcpy(sf->raw_cid, cmd.c_resp, sizeof(sf->raw_cid));
/*
* Silence the card by assigning it a unique RCA, or
* querying it for its RCA in the case of SD.
*/
if (sdmmc_set_relative_addr(sc, sf) != 0) {
aprint_error_dev(sc->sc_dev, "couldn't set mem RCA\n");
sdmmc_function_free(sf);
break;
}
#if 0
/* Verify that the RCA has been set by selecting the card. */
if (sdmmc_select_card(sc, sf) != 0) {
printf("%s: can't select mem RCA %d (verify)\n",
SDMMCDEVNAME(sc), sf->rca);
sdmmc_function_free(sf);
break;
}
/* Deselect. */
(void)sdmmc_select_card(sc, NULL);
#endif
/*
* If this is a memory-only card, the card responding
* first becomes an alias for SDIO function 0.
*/
if (sc->sc_fn0 == NULL)
sc->sc_fn0 = sf;
SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf, sf_list);
}
/*
* All cards are either inactive or awaiting further commands.
* Read the CSDs and decode the raw CID for each card.
*/
SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) {
memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_SEND_CSD;
cmd.c_arg = MMC_ARG_RCA(sf->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R2;
if (sdmmc_mmc_command(sc, &cmd) != 0) {
SET(sf->flags, SFF_ERROR);
continue;
}
if (sdmmc_decode_csd(sc, cmd.c_resp, sf) != 0 ||
sdmmc_decode_cid(sc, sf->raw_cid, sf) != 0) {
SET(sf->flags, SFF_ERROR);
continue;
}
#ifdef SDMMC_DEBUG
printf("%s: CID: ", SDMMCDEVNAME(sc));
sdmmc_print_cid(&sf->cid);
#endif
}
SDMMC_UNLOCK(sc);
}
int
sdmmc_decode_csd(struct sdmmc_softc *sc, sdmmc_response resp,
struct sdmmc_function *sf)
{
/* TRAN_SPEED(2:0): transfer rate exponent */
static const int speed_exponent[8] = {
100 * 1, /* 100 Kbits/s */
1 * 1000, /* 1 Mbits/s */
10 * 1000, /* 10 Mbits/s */
100 * 1000, /* 100 Mbits/s */
0,
0,
0,
0,
};
/* TRAN_SPEED(6:3): time mantissa */
static const int speed_mantissa[16] = {
0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80,
};
struct sdmmc_csd *csd = &sf->csd;
int e, m;
if (ISSET(sc->sc_flags, SMF_SD_MODE)) {
/*
* CSD version 1.0 corresponds to SD system
* specification version 1.0 - 1.10. (SanDisk, 3.5.3)
*/
csd->csdver = SD_CSD_CSDVER(resp);
switch (csd->csdver) {
case SD_CSD_CSDVER_2_0:
DPRINTF(("%s: SD Ver.2.0\n", SDMMCDEVNAME(sc)));
SET(sf->flags, SFF_SDHC);
csd->capacity = SD_CSD_V2_CAPACITY(resp);
csd->read_bl_len = SD_CSD_V2_BL_LEN;
break;
case SD_CSD_CSDVER_1_0:
DPRINTF(("%s: SD Ver.1.0\n", SDMMCDEVNAME(sc)));
csd->capacity = SD_CSD_CAPACITY(resp);
csd->read_bl_len = SD_CSD_READ_BL_LEN(resp);
break;
default:
aprint_error_dev(sc->sc_dev,
"unknown SD CSD structure version 0x%x\n",
csd->csdver);
return 1;
}
csd->mmcver = SD_CSD_MMCVER(resp);
csd->write_bl_len = SD_CSD_WRITE_BL_LEN(resp);
csd->r2w_factor = SD_CSD_R2W_FACTOR(resp);
e = SD_CSD_SPEED_EXP(resp);
m = SD_CSD_SPEED_MANT(resp);
csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
} else {
csd->csdver = MMC_CSD_CSDVER(resp);
if (csd->csdver != MMC_CSD_CSDVER_1_0 &&
csd->csdver != MMC_CSD_CSDVER_2_0) {
aprint_error_dev(sc->sc_dev,
"unknown MMC CSD structure version 0x%x\n",
csd->csdver);
return 1;
}
csd->mmcver = MMC_CSD_MMCVER(resp);
csd->capacity = MMC_CSD_CAPACITY(resp);
csd->read_bl_len = MMC_CSD_READ_BL_LEN(resp);
csd->write_bl_len = MMC_CSD_WRITE_BL_LEN(resp);
csd->r2w_factor = MMC_CSD_R2W_FACTOR(resp);
e = MMC_CSD_TRAN_SPEED_EXP(resp);
m = MMC_CSD_TRAN_SPEED_MANT(resp);
csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
}
csd->sector_size = MIN((1 << csd->read_bl_len),
sdmmc_chip_host_maxblklen(sc->sc_sct, sc->sc_sch));
if (csd->sector_size < (1 << csd->read_bl_len))
csd->capacity *= (1 << csd->read_bl_len) / csd->sector_size;
csd->sector_size_sb = ffs(csd->sector_size) - 1;
if (sc->sc_busclk > csd->tran_speed)
sc->sc_busclk = csd->tran_speed;
#ifdef SDMMC_DUMP_CSD
sdmmc_print_csd(resp, csd);
#endif
return 0;
}
int
sdmmc_decode_cid(struct sdmmc_softc *sc, sdmmc_response resp,
struct sdmmc_function *sf)
{
struct sdmmc_cid *cid = &sf->cid;
if (ISSET(sc->sc_flags, SMF_SD_MODE)) {
cid->mid = SD_CID_MID(resp);
cid->oid = SD_CID_OID(resp);
SD_CID_PNM_CPY(resp, cid->pnm);
cid->rev = SD_CID_REV(resp);
cid->psn = SD_CID_PSN(resp);
cid->mdt = SD_CID_MDT(resp);
} else {
switch(sf->csd.mmcver) {
case MMC_CSD_MMCVER_1_0:
case MMC_CSD_MMCVER_1_4:
cid->mid = MMC_CID_MID_V1(resp);
MMC_CID_PNM_V1_CPY(resp, cid->pnm);
cid->rev = MMC_CID_REV_V1(resp);
cid->psn = MMC_CID_PSN_V1(resp);
cid->mdt = MMC_CID_MDT_V1(resp);
break;
case MMC_CSD_MMCVER_2_0:
case MMC_CSD_MMCVER_3_1:
case MMC_CSD_MMCVER_4_0:
cid->mid = MMC_CID_MID_V2(resp);
cid->oid = MMC_CID_OID_V2(resp);
MMC_CID_PNM_V2_CPY(resp, cid->pnm);
cid->psn = MMC_CID_PSN_V2(resp);
break;
default:
aprint_error_dev(sc->sc_dev, "unknown MMC version %d\n",
sf->csd.mmcver);
return 1;
}
}
return 0;
}
void
sdmmc_print_cid(struct sdmmc_cid *cid)
{
printf("mid=0x%02x oid=0x%04x pnm=\"%s\" rev=0x%02x psn=0x%08x"
" mdt=%03x\n", cid->mid, cid->oid, cid->pnm, cid->rev, cid->psn,
cid->mdt);
}
#ifdef SDMMC_DUMP_CSD
static void
sdmmc_print_csd(sdmmc_response resp, struct sdmmc_csd *csd)
{
printf("csdver = %d\n", csd->csdver);
printf("mmcver = %d\n", csd->mmcver);
printf("capacity = %08x\n", csd->capacity);
printf("read_bl_len = %d\n", csd->read_bl_len);
printf("write_cl_len = %d\n", csd->write_bl_len);
printf("r2w_factor = %d\n", csd->r2w_factor);
printf("tran_speed = %d\n", csd->tran_speed);
printf("sector_size = %d\n", csd->sector_size);
}
#endif
/*
* Initialize a SD/MMC memory card.
*/
int
sdmmc_mem_init(struct sdmmc_softc *sc, struct sdmmc_function *sf)
{
int error;
SDMMC_LOCK(sc);
error = sdmmc_select_card(sc, sf);
if (error)
goto out;
if (!ISSET(sf->flags, SFF_SDHC)) {
error = sdmmc_mem_set_blocklen(sc, sf);
if (error)
goto out;
}
out:
SDMMC_UNLOCK(sc);
return error;
}
/*
* Get or set the card's memory OCR value (SD or MMC).
*/
static int
sdmmc_mem_send_op_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
struct sdmmc_command cmd;
int error;
int retry;
/* Don't lock */
/*
* If we change the OCR value, retry the command until the OCR
* we receive in response has the "CARD BUSY" bit set, meaning
* that all cards are ready for identification.
*/
for (retry = 0; retry < 100; retry++) {
memset(&cmd, 0, sizeof(cmd));
cmd.c_arg = ocr;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R3;
if (ISSET(sc->sc_flags, SMF_SD_MODE)) {
cmd.c_opcode = SD_APP_OP_COND;
error = sdmmc_app_command(sc, &cmd);
} else {
cmd.c_opcode = MMC_SEND_OP_COND;
error = sdmmc_mmc_command(sc, &cmd);
}
if (error)
break;
if (ISSET(MMC_R3(cmd.c_resp), MMC_OCR_MEM_READY) || ocr == 0)
break;
error = ETIMEDOUT;
sdmmc_delay(10000);
}
if (error == 0 && ocrp != NULL)
*ocrp = MMC_R3(cmd.c_resp);
return error;
}
static int
sdmmc_mem_send_if_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
struct sdmmc_command cmd;
int error;
/* Don't lock */
memset(&cmd, 0, sizeof(cmd));
cmd.c_arg = ocr;
cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R7;
cmd.c_opcode = SD_SEND_IF_COND;
error = sdmmc_mmc_command(sc, &cmd);
if (error == 0 && ocrp != NULL)
*ocrp = MMC_R7(cmd.c_resp);
return error;
}
/*
* Set the read block length appropriately for this card, according to
* the card CSD register value.
*/
static int
sdmmc_mem_set_blocklen(struct sdmmc_softc *sc, struct sdmmc_function *sf)
{
struct sdmmc_command cmd;
int error;
/* Don't lock */
memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SET_BLOCKLEN;
cmd.c_arg = sf->csd.sector_size;
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1;
error = sdmmc_mmc_command(sc, &cmd);
DPRINTF(("%s: sdmmc_mem_set_blocklen: read_bl_len=%d sector_size=%d\n",
SDMMCDEVNAME(sc), 1 << sf->csd.read_bl_len, sf->csd.sector_size));
return error;
}
static int
sdmmc_mem_read_block_subr(struct sdmmc_function *sf, uint32_t blkno,
u_char *data, size_t datalen)
{
struct sdmmc_softc *sc = sf->sc;
struct sdmmc_command cmd;
int error;
error = sdmmc_select_card(sc, sf);
if (error)
goto out;
memset(&cmd, 0, sizeof(cmd));
cmd.c_data = data;
cmd.c_datalen = datalen;
cmd.c_blklen = sf->csd.sector_size;
cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
MMC_READ_BLOCK_MULTIPLE : MMC_READ_BLOCK_SINGLE;
cmd.c_arg = blkno;
if (!ISSET(sf->flags, SFF_SDHC))
cmd.c_arg <<= sf->csd.sector_size_sb;
cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1;
if (ISSET(sc->sc_caps, SMC_CAPS_DMA))
cmd.c_dmamap = sc->sc_dmap;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;
if (!ISSET(sc->sc_caps, SMC_CAPS_AUTO_STOP)) {
if (cmd.c_opcode == MMC_READ_BLOCK_MULTIPLE) {
memset(&cmd, 0, sizeof cmd);
cmd.c_opcode = MMC_STOP_TRANSMISSION;
cmd.c_arg = MMC_ARG_RCA(sf->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1B;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;
}
}
do {
memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SEND_STATUS;
cmd.c_arg = MMC_ARG_RCA(sf->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
break;
/* XXX time out */
} while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
out:
return error;
}
int
sdmmc_mem_read_block(struct sdmmc_function *sf, uint32_t blkno, u_char *data,
size_t datalen)
{
struct sdmmc_softc *sc = sf->sc;
int error;
SDMMC_LOCK(sc);
if (!ISSET(sc->sc_caps, SMC_CAPS_DMA)) {
error = sdmmc_mem_read_block_subr(sf, blkno, data, datalen);
goto out;
}
/* DMA transfer */
error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmap, data, datalen, NULL,
BUS_DMA_NOWAIT|BUS_DMA_STREAMING|BUS_DMA_READ);
if (error)
goto out;
bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, 0, datalen,
BUS_DMASYNC_PREREAD);
error = sdmmc_mem_read_block_subr(sf, blkno, data, datalen);
if (error)
goto unload;
bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, 0, datalen,
BUS_DMASYNC_POSTREAD);
unload:
bus_dmamap_unload(sc->sc_dmat, sc->sc_dmap);
out:
SDMMC_UNLOCK(sc);
return error;
}
static int
sdmmc_mem_write_block_subr(struct sdmmc_function *sf, uint32_t blkno,
u_char *data, size_t datalen)
{
struct sdmmc_softc *sc = sf->sc;
struct sdmmc_command cmd;
int error;
error = sdmmc_select_card(sc, sf);
if (error)
goto out;
memset(&cmd, 0, sizeof(cmd));
cmd.c_data = data;
cmd.c_datalen = datalen;
cmd.c_blklen = sf->csd.sector_size;
cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
MMC_WRITE_BLOCK_MULTIPLE : MMC_WRITE_BLOCK_SINGLE;
cmd.c_arg = blkno;
if (!ISSET(sf->flags, SFF_SDHC))
cmd.c_arg <<= sf->csd.sector_size_sb;
cmd.c_flags = SCF_CMD_ADTC | SCF_RSP_R1;
if (ISSET(sc->sc_caps, SMC_CAPS_DMA))
cmd.c_dmamap = sc->sc_dmap;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;
if (!ISSET(sc->sc_caps, SMC_CAPS_AUTO_STOP)) {
if (cmd.c_opcode == MMC_WRITE_BLOCK_MULTIPLE) {
memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_STOP_TRANSMISSION;
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1B;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
goto out;
}
}
do {
memset(&cmd, 0, sizeof(cmd));
cmd.c_opcode = MMC_SEND_STATUS;
cmd.c_arg = MMC_ARG_RCA(sf->rca);
cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1;
error = sdmmc_mmc_command(sc, &cmd);
if (error)
break;
/* XXX time out */
} while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
out:
return error;
}
int
sdmmc_mem_write_block(struct sdmmc_function *sf, uint32_t blkno, u_char *data,
size_t datalen)
{
struct sdmmc_softc *sc = sf->sc;
int error;
SDMMC_LOCK(sc);
if (sdmmc_chip_write_protect(sc->sc_sct, sc->sc_sch)) {
aprint_normal_dev(sc->sc_dev, "write-protected\n");
error = EIO;
goto out;
}
if (!ISSET(sc->sc_caps, SMC_CAPS_DMA)) {
error = sdmmc_mem_write_block_subr(sf, blkno, data, datalen);
goto out;
}
/* DMA transfer */
error = bus_dmamap_load(sc->sc_dmat, sc->sc_dmap, data, datalen, NULL,
BUS_DMA_NOWAIT|BUS_DMA_STREAMING|BUS_DMA_WRITE);
if (error)
goto out;
bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, 0, datalen,
BUS_DMASYNC_PREWRITE);
error = sdmmc_mem_write_block_subr(sf, blkno, data, datalen);
if (error)
goto unload;
bus_dmamap_sync(sc->sc_dmat, sc->sc_dmap, 0, datalen,
BUS_DMASYNC_POSTWRITE);
unload:
bus_dmamap_unload(sc->sc_dmat, sc->sc_dmap);
out:
SDMMC_UNLOCK(sc);
return error;
}
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