Grr ... sent wrong version. This passes "host" not "host->card" in
one place (GCC would warn, and is otherwise the same.
====== CUT HERE
Teach the MMC/SD/SDIO core about using SPI mode.
- Use mmc_host_is_spi() so enumeration works through SPI signaling
and protocols, not just the native versions.
- Provide the SPI response type flags with each request issued,
including requests from the new lock/unlock code.
- Understand that some commands act a bit differently ... notably:
* OP_COND command reports busy status differently
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
- Understand that cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects checking card lock status, and some others.
Those changes required some new and updated primitives:
- Provide utilities to access two SPI-only requests, and one
request that wasn't previously needed:
* mmc_spi_read_ocr() ... SPI only
* mmc_spi_set_crc() ... SPI only (override by module parm)
* mmc_spi_send_cid() ... works without broadcast mode
- Updated internal routines:
* Previous mmc_send_csd() modified into mmc_send_cxd_native();
it uses native "R2" responses, which include 16 bytes of data.
* Previous mmc_send_ext_csd() becomes new mmc_send_cxd_data()
helper for command-and-data access
* Bugfix to that mmc_send_cxd_data() code: dma-to-stack is
unsafe/nonportable, so kmalloc a bounce buffer instead.
- Modified mmc_send_ext_csd() now uses mmc_send_cxd_data() helper
- Modified mmc_send_csd(), and new mmc_spi_send_cid(), routines use
those helper routines based on whether they're native or SPI
The SPI support hasn't been tested on the new MMC4 cards (they're not
widely available); likewise SD cards with 4GB and up may have surprises
lurking.
Signed-off-by: David Brownell <[EMAIL PROTECTED]>
---
drivers/mmc/core/core.c | 24 ++++--
drivers/mmc/core/mmc.c | 39 +++++++---
drivers/mmc/core/mmc_ops.c | 165 ++++++++++++++++++++++++++++++++++++---------
drivers/mmc/core/mmc_ops.h | 3
drivers/mmc/core/sd.c | 37 +++++++---
drivers/mmc/core/sd_ops.c | 32 ++++++--
6 files changed, 232 insertions(+), 68 deletions(-)
--- g26.orig/drivers/mmc/core/mmc_ops.h 2007-07-26 13:13:23.000000000 -0700
+++ g26/drivers/mmc/core/mmc_ops.h 2007-07-26 14:54:35.000000000 -0700
@@ -22,6 +22,9 @@ int mmc_send_csd(struct mmc_card *card,
int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd);
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value);
int mmc_send_status(struct mmc_card *card, u32 *status);
+int mmc_send_cid(struct mmc_host *host, u32 *cid);
+int mmc_spi_read_ocr(struct mmc_host *host, u32 *ocrp);
+int mmc_spi_set_crc(struct mmc_host *host);
#endif
--- g26.orig/drivers/mmc/core/core.c 2007-07-26 13:13:24.000000000 -0700
+++ g26/drivers/mmc/core/core.c 2007-07-26 14:54:35.000000000 -0700
@@ -404,8 +404,13 @@ static void mmc_power_up(struct mmc_host
int bit = fls(host->ocr_avail) - 1;
host->ios.vdd = bit;
- host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
- host->ios.chip_select = MMC_CS_DONTCARE;
+ if (mmc_host_is_spi(host)) {
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
+ } else {
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ }
host->ios.power_mode = MMC_POWER_UP;
host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ios.timing = MMC_TIMING_LEGACY;
@@ -424,8 +429,10 @@ static void mmc_power_off(struct mmc_hos
{
host->ios.clock = 0;
host->ios.vdd = 0;
- host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
- host->ios.chip_select = MMC_CS_DONTCARE;
+ if (!mmc_host_is_spi(host)) {
+ host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ }
host->ios.power_mode = MMC_POWER_OFF;
host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ios.timing = MMC_TIMING_LEGACY;
@@ -541,7 +548,9 @@ void mmc_rescan(struct work_struct *work
err = mmc_send_app_op_cond(host, 0, &ocr);
if (err == MMC_ERR_NONE) {
- if (mmc_attach_sd(host, ocr))
+ if (mmc_host_is_spi(host))
+ err = mmc_spi_read_ocr(host, &ocr);
+ if (err != MMC_ERR_NONE || mmc_attach_sd(host, ocr))
mmc_power_off(host);
} else {
/*
@@ -550,7 +559,10 @@ void mmc_rescan(struct work_struct *work
*/
err = mmc_send_op_cond(host, 0, &ocr);
if (err == MMC_ERR_NONE) {
- if (mmc_attach_mmc(host, ocr))
+ if (mmc_host_is_spi(host))
+ err = mmc_spi_read_ocr(host, &ocr);
+ if (err != MMC_ERR_NONE
+ || mmc_attach_mmc(host, ocr))
mmc_power_off(host);
} else {
mmc_power_off(host);
--- g26.orig/drivers/mmc/core/mmc_ops.c 2007-07-26 13:13:23.000000000 -0700
+++ g26/drivers/mmc/core/mmc_ops.c 2007-07-26 15:21:57.000000000 -0700
@@ -63,23 +63,34 @@ int mmc_go_idle(struct mmc_host *host)
int err;
struct mmc_command cmd;
- mmc_set_chip_select(host, MMC_CS_HIGH);
-
- mmc_delay(1);
+ /*
+ * Non-SPI hosts need to prevent chipselect going active during
+ * GO_IDLE; that would put chips into SPI mode. Remind them of
+ * that in case of hardware that won't pull up DAT3/nCS otherwise.
+ *
+ * SPI hosts ignore ios.chip_select; it's managed according to
+ * rules that must accomodate non-MMC slaves which this layer
+ * won't even know about.
+ */
+ if (!mmc_host_is_spi(host)) {
+ mmc_set_chip_select(host, MMC_CS_HIGH);
+ mmc_delay(1);
+ }
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
- cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
err = mmc_wait_for_cmd(host, &cmd, 0);
mmc_delay(1);
- mmc_set_chip_select(host, MMC_CS_DONTCARE);
-
- mmc_delay(1);
+ if (!mmc_host_is_spi(host)) {
+ mmc_set_chip_select(host, MMC_CS_DONTCARE);
+ mmc_delay(1);
+ }
return err;
}
@@ -94,15 +105,19 @@ int mmc_send_op_cond(struct mmc_host *ho
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_SEND_OP_COND;
- cmd.arg = ocr;
- cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
+ cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_cmd(host, &cmd, 0);
if (err != MMC_ERR_NONE)
break;
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ if (mmc_host_is_spi(host)) {
+ /* wait until reset completes */
+ if (!(cmd.resp[0] & R1_SPI_IDLE))
+ break;
+ } else if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
break;
err = MMC_ERR_TIMEOUT;
@@ -110,7 +125,7 @@ int mmc_send_op_cond(struct mmc_host *ho
mmc_delay(10);
}
- if (rocr)
+ if (rocr && !mmc_host_is_spi(host))
*rocr = cmd.resp[0];
return err;
@@ -160,40 +175,46 @@ int mmc_set_relative_addr(struct mmc_car
return MMC_ERR_NONE;
}
-int mmc_send_csd(struct mmc_card *card, u32 *csd)
+static int
+mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
{
int err;
struct mmc_command cmd;
- BUG_ON(!card);
- BUG_ON(!card->host);
- BUG_ON(!csd);
+ BUG_ON(!host);
+ BUG_ON(!cxd);
memset(&cmd, 0, sizeof(struct mmc_command));
- cmd.opcode = MMC_SEND_CSD;
- cmd.arg = card->rca << 16;
+ cmd.opcode = opcode;
+ cmd.arg = arg;
cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
- err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
+ err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
if (err != MMC_ERR_NONE)
return err;
- memcpy(csd, cmd.resp, sizeof(u32) * 4);
+ memcpy(cxd, cmd.resp, sizeof(u32) * 4);
return MMC_ERR_NONE;
}
-int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
+static int
+mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
+ u32 opcode, void *buf, unsigned len)
{
struct mmc_request mrq;
struct mmc_command cmd;
struct mmc_data data;
struct scatterlist sg;
+ void *data_buf;
- BUG_ON(!card);
- BUG_ON(!card->host);
- BUG_ON(!ext_csd);
+ /* dma onto stack is unsafe/nonportable, but callers here
+ * normally provide temporary on-stack buffers.
+ */
+ data_buf = kmalloc(len, GFP_KERNEL);
+ if (data_buf == NULL)
+ return -ENOMEM;
memset(&mrq, 0, sizeof(struct mmc_request));
memset(&cmd, 0, sizeof(struct mmc_command));
@@ -202,21 +223,31 @@ int mmc_send_ext_csd(struct mmc_card *ca
mrq.cmd = &cmd;
mrq.data = &data;
- cmd.opcode = MMC_SEND_EXT_CSD;
+ cmd.opcode = opcode;
cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
- data.blksz = 512;
+ /* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
+ * rely on callers to never use this with "native" calls for reading
+ * CSD or CID. Native versions of those commands use the R2 type,
+ * not R1 plus a data block.
+ */
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
+
+ data.blksz = len;
data.blocks = 1;
data.flags = MMC_DATA_READ;
data.sg = &sg;
data.sg_len = 1;
- sg_init_one(&sg, ext_csd, 512);
+ sg_init_one(&sg, data_buf, len);
- mmc_set_data_timeout(&data, card, 0);
+ if (card)
+ mmc_set_data_timeout(&data, card, 0);
- mmc_wait_for_req(card->host, &mrq);
+ mmc_wait_for_req(host, &mrq);
+
+ memcpy(buf, data_buf, len);
+ kfree(data_buf);
if (cmd.error != MMC_ERR_NONE)
return cmd.error;
@@ -226,6 +257,72 @@ int mmc_send_ext_csd(struct mmc_card *ca
return MMC_ERR_NONE;
}
+int mmc_send_csd(struct mmc_card *card, u32 *csd)
+{
+ if (!mmc_host_is_spi(card->host))
+ return mmc_send_cxd_native(card->host, card->rca << 16,
+ csd, MMC_SEND_CSD);
+
+ return mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd, 16);
+}
+
+int mmc_send_cid(struct mmc_host *host, u32 *cid)
+{
+ if (!mmc_host_is_spi(host)) {
+ if (!host->card)
+ return MMC_ERR_INVALID;
+ return mmc_send_cxd_native(host, host->card->rca << 16,
+ cid, MMC_SEND_CID);
+ }
+
+ return mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid, 16);
+}
+
+int mmc_send_ext_csd(struct mmc_card *card, u8 *ext_csd)
+{
+ return mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD,
+ ext_csd, 512);
+}
+
+int mmc_spi_read_ocr(struct mmc_host *host, u32 *ocrp)
+{
+ struct mmc_command cmd;
+ int err;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_SPI_READ_OCR;
+ cmd.flags = MMC_RSP_SPI_R3;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+
+ *ocrp = cmd.resp[1];
+ return err;
+}
+
+/* Enabling software CRCs can be a significant (30%) performance cost,
+ * and for other reasons isn't always desired; so it can be disabled.
+ */
+static int use_spi_crc = 1;
+module_param(use_spi_crc, bool, 0);
+
+int mmc_spi_set_crc(struct mmc_host *host)
+{
+ struct mmc_command cmd;
+ int err;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_SPI_CRC_ON_OFF;
+ cmd.flags = MMC_RSP_SPI_R1;
+ cmd.arg = use_spi_crc;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (err == MMC_ERR_NONE)
+ host->use_spi_crc = use_spi_crc;
+ return err;
+}
+
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
{
int err;
@@ -241,7 +338,7 @@ int mmc_switch(struct mmc_card *card, u8
(index << 16) |
(value << 8) |
set;
- cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
+ cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
if (err != MMC_ERR_NONE)
@@ -261,13 +358,17 @@ int mmc_send_status(struct mmc_card *car
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = MMC_SEND_STATUS;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ if (!mmc_host_is_spi(card->host))
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
if (err != MMC_ERR_NONE)
return err;
+ /* NOTE: callers are required to understand the difference
+ * between "native" and SPI format status words!
+ */
if (status)
*status = cmd.resp[0];
--- g26.orig/drivers/mmc/core/mmc.c 2007-07-26 13:13:24.000000000 -0700
+++ g26/drivers/mmc/core/mmc.c 2007-07-26 14:54:35.000000000 -0700
@@ -262,9 +262,21 @@ static int mmc_init_card(struct mmc_host
goto err;
/*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host);
+ if (err != MMC_ERR_NONE)
+ goto err;
+ }
+
+ /*
* Fetch CID from card.
*/
- err = mmc_all_send_cid(host, cid);
+ if (mmc_host_is_spi(host))
+ err = mmc_send_cid(host, cid);
+ else
+ err = mmc_all_send_cid(host, cid);
if (err != MMC_ERR_NONE)
goto err;
@@ -287,13 +299,15 @@ static int mmc_init_card(struct mmc_host
}
/*
- * Set card RCA.
+ * For native busses: set card RCA and leave open drain mode.
*/
- err = mmc_set_relative_addr(card);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_set_relative_addr(card);
+ if (err != MMC_ERR_NONE)
+ goto free_card;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
if (!oldcard) {
/*
@@ -314,13 +328,15 @@ static int mmc_init_card(struct mmc_host
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err != MMC_ERR_NONE)
+ goto free_card;
+ }
if (!oldcard) {
/*
- * Fetch and process extened CSD.
+ * Fetch and process extended CSD.
*/
err = mmc_read_ext_csd(card);
if (err != MMC_ERR_NONE)
@@ -480,7 +496,8 @@ static void mmc_suspend(struct mmc_host
BUG_ON(!host->card);
mmc_claim_host(host);
- mmc_deselect_cards(host);
+ if (!mmc_host_is_spi(host))
+ mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
}
--- g26.orig/drivers/mmc/core/sd.c 2007-07-26 13:13:23.000000000 -0700
+++ g26/drivers/mmc/core/sd.c 2007-07-26 14:54:35.000000000 -0700
@@ -319,9 +319,21 @@ static int mmc_sd_init_card(struct mmc_h
goto err;
/*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host);
+ if (err != MMC_ERR_NONE)
+ goto err;
+ }
+
+ /*
* Fetch CID from card.
*/
- err = mmc_all_send_cid(host, cid);
+ if (mmc_host_is_spi(host))
+ err = mmc_send_cid(host, cid);
+ else
+ err = mmc_all_send_cid(host, cid);
if (err != MMC_ERR_NONE)
goto err;
@@ -343,13 +355,15 @@ static int mmc_sd_init_card(struct mmc_h
}
/*
- * Set card RCA.
+ * For native busses: get card RCA and leave open drain mode.
*/
- err = mmc_send_relative_addr(host, &card->rca);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_send_relative_addr(host, &card->rca);
+ if (err != MMC_ERR_NONE)
+ goto free_card;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
if (!oldcard) {
/*
@@ -369,9 +383,11 @@ static int mmc_sd_init_card(struct mmc_h
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err != MMC_ERR_NONE)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err != MMC_ERR_NONE)
+ goto free_card;
+ }
if (!oldcard) {
/*
@@ -554,7 +570,8 @@ static void mmc_sd_suspend(struct mmc_ho
BUG_ON(!host->card);
mmc_claim_host(host);
- mmc_deselect_cards(host);
+ if (!mmc_host_is_spi(host))
+ mmc_deselect_cards(host);
host->card->state &= ~MMC_STATE_HIGHSPEED;
mmc_release_host(host);
}
--- g26.orig/drivers/mmc/core/sd_ops.c 2007-07-26 13:13:24.000000000 -0700
+++ g26/drivers/mmc/core/sd_ops.c 2007-07-26 14:54:35.000000000 -0700
@@ -70,6 +70,12 @@ int mmc_wait_for_app_cmd(struct mmc_host
err = cmd->error;
if (cmd->error == MMC_ERR_NONE)
break;
+
+ /* no point in retrying illegal commands! */
+ if (mmc_host_is_spi(host)) {
+ if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+ break;
+ }
}
return err;
@@ -89,10 +95,10 @@ int mmc_app_cmd(struct mmc_host *host, s
if (card) {
cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
} else {
cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_BCR;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_BCR;
}
err = mmc_wait_for_cmd(host, &cmd, 0);
@@ -100,8 +106,8 @@ int mmc_app_cmd(struct mmc_host *host, s
return err;
/* Check that card supported application commands */
- if (!(cmd.resp[0] & R1_APP_CMD))
- return MMC_ERR_FAILED;
+ if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
+ return (u32)-1;
return MMC_ERR_NONE;
}
@@ -148,14 +154,18 @@ int mmc_send_app_op_cond(struct mmc_host
cmd.opcode = SD_APP_OP_COND;
cmd.arg = ocr;
- cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_app_cmd(host, NULL, &cmd, MMC_CMD_RETRIES);
if (err != MMC_ERR_NONE)
break;
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ if (mmc_host_is_spi(host)) {
+ /* wait until reset completes */
+ if (!(cmd.resp[0] & R1_SPI_IDLE))
+ break;
+ } else if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
break;
err = MMC_ERR_TIMEOUT;
@@ -182,7 +192,7 @@ int mmc_send_if_cond(struct mmc_host *ho
*/
cmd.opcode = SD_SEND_IF_COND;
cmd.arg = ((ocr & 0xFF8000) != 0) << 8 | test_pattern;
- cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
+ cmd.flags = MMC_RSP_SPI_R7 | MMC_RSP_R7 | MMC_CMD_BCR;
err = mmc_wait_for_cmd(host, &cmd, 0);
if (err != MMC_ERR_NONE)
@@ -229,6 +239,8 @@ int mmc_app_send_scr(struct mmc_card *ca
BUG_ON(!card->host);
BUG_ON(!scr);
+ /* NOTE: caller guarantees scr is heap-allocated */
+
err = mmc_app_cmd(card->host, card);
if (err != MMC_ERR_NONE)
return err;
@@ -242,7 +254,7 @@ int mmc_app_send_scr(struct mmc_card *ca
cmd.opcode = SD_APP_SEND_SCR;
cmd.arg = 0;
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 8;
data.blocks = 1;
@@ -278,6 +290,8 @@ int mmc_sd_switch(struct mmc_card *card,
BUG_ON(!card);
BUG_ON(!card->host);
+ /* NOTE: caller guarantees resp is heap-allocated */
+
mode = !!mode;
value &= 0xF;
@@ -292,7 +306,7 @@ int mmc_sd_switch(struct mmc_card *card,
cmd.arg = mode << 31 | 0x00FFFFFF;
cmd.arg &= ~(0xF << (group * 4));
cmd.arg |= value << (group * 4);
- cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
+ cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
data.blksz = 64;
data.blocks = 1;
-------------------------------------------------------------------------
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