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 cmd->resp[0] and mmc_get_status() results for SPI
return different values than for "native" MMC/SD protocol; this
affects resetting, checking card lock status, and some others.
- Understand that some commands act a bit differently ... notably:
* OP_COND command doesn't return the OCR
* APP_CMD status doesn't have an R1_APP_CMD analogue
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_send_cid() ... for use 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 newest categories of cards supported by the MMC stack aren't expected
to work yet with SPI: MMC or SD cards with over 4GB data, and SDIO.
All those cards support SPI mode, so eventually they should work too.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
break;
}
- printk(KERN_INFO "%s: new %s%s card at address %04x\n",
- mmc_hostname(card->host),
- mmc_card_highspeed(card) ? "high speed " : "",
- type, card->rca);
+ if (mmc_host_is_spi(card->host)) {
+ printk(KERN_INFO "%s: new %s%s card on SPI\n",
+ mmc_hostname(card->host),
+ mmc_card_highspeed(card) ? "high speed " : "",
+ type);
+ } else {
+ printk(KERN_INFO "%s: new %s%s card at address %04x\n",
+ mmc_hostname(card->host),
+ mmc_card_highspeed(card) ? "high speed " : "",
+ type, card->rca);
+ }
card->dev.uevent_suppress = 1;
void mmc_remove_card(struct mmc_card *card)
{
if (mmc_card_present(card)) {
- printk(KERN_INFO "%s: card %04x removed\n",
- mmc_hostname(card->host), card->rca);
+ if (mmc_host_is_spi(card->host)) {
+ printk(KERN_INFO "%s: SPI card removed\n",
+ mmc_hostname(card->host));
+ } else {
+ printk(KERN_INFO "%s: card %04x removed\n",
+ mmc_hostname(card->host), card->rca);
+ }
if (card->host->bus_ops->sysfs_remove)
card->host->bus_ops->sysfs_remove(card->host, card);
static struct workqueue_struct *workqueue;
+/*
+ * Enabling software CRCs on the data blocks can be a significant (30%)
+ * performance cost, and for other reasons may not always be desired.
+ * So we allow it it to be disabled.
+ */
+int use_spi_crc = 1;
+module_param(use_spi_crc, bool, 0);
+
/*
* Internal function. Schedule delayed work in the MMC work queue.
*/
struct mmc_command *cmd = mrq->cmd;
int err = cmd->error;
+ if (err && cmd->retries && mmc_host_is_spi(host)) {
+ if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+ cmd->retries = 0;
+ }
+
if (err && cmd->retries) {
pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
mmc_hostname(host), cmd->opcode, err);
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;
{
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;
void mmc_start_host(struct mmc_host *host);
void mmc_stop_host(struct mmc_host *host);
+extern int use_spi_crc;
+
#endif
BUG_ON(!card);
- err = -EIO;
-
if (card->csd.mmca_vsn < CSD_SPEC_VER_4)
return 0;
if (err)
goto err;
+ /*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host, use_spi_crc);
+ if (err)
+ 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)
goto err;
}
/*
- * Set card RCA.
+ * For native busses: set card RCA and quit open drain mode.
*/
- err = mmc_set_relative_addr(card);
- if (err)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_set_relative_addr(card);
+ if (err)
+ goto free_card;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
if (!oldcard) {
/*
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err)
+ goto free_card;
+ }
if (!oldcard) {
/*
- * Fetch and process extened CSD.
+ * Fetch and process extended CSD.
*/
err = mmc_read_ext_csd(card);
if (err)
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);
}
mmc_attach_bus(host, &mmc_ops);
+ /*
+ * We need to get OCR a different way for SPI.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_read_ocr(host, 1, &ocr);
+ if (err)
+ goto err;
+ }
+
/*
* Sanity check the voltages that the card claims to
* support.
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);
+ if (!mmc_host_is_spi(host)) {
+ mmc_set_chip_select(host, MMC_CS_DONTCARE);
+ mmc_delay(1);
+ }
- mmc_delay(1);
+ host->use_spi_crc = 0;
return err;
}
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)
break;
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ /* if we're just probing, do a single pass */
+ if (ocr == 0)
break;
+ /* otherwise wait until reset completes */
+ if (mmc_host_is_spi(host)) {
+ if (!(cmd.resp[0] & R1_SPI_IDLE))
+ break;
+ } else {
+ if (cmd.resp[0] & MMC_CARD_BUSY)
+ break;
+ }
+
err = -ETIMEDOUT;
mmc_delay(10);
}
- if (rocr)
+ if (rocr && !mmc_host_is_spi(host))
*rocr = cmd.resp[0];
return err;
return 0;
}
-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)
return err;
- memcpy(csd, cmd.resp, sizeof(u32) * 4);
+ memcpy(cxd, cmd.resp, sizeof(u32) * 4);
return 0;
}
-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 to this
+ * routine 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));
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);
+ if (card)
+ mmc_set_data_timeout(&data, card);
- mmc_wait_for_req(card->host, &mrq);
+ mmc_wait_for_req(host, &mrq);
+
+ memcpy(buf, data_buf, len);
+ kfree(data_buf);
if (cmd.error)
return cmd.error;
return 0;
}
+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 -EINVAL;
+ 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, int highcap, u32 *ocrp)
+{
+ struct mmc_command cmd;
+ int err;
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_SPI_READ_OCR;
+ cmd.arg = highcap ? (1 << 30) : 0;
+ cmd.flags = MMC_RSP_SPI_R3;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+
+ *ocrp = cmd.resp[1];
+ return err;
+}
+
+int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
+{
+ 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_crc;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if (!err)
+ host->use_spi_crc = use_crc;
+ return err;
+}
+
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value)
{
int err;
(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)
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)
return err;
+ /* NOTE: callers are required to understand the difference
+ * between "native" and SPI format status words!
+ */
if (status)
*status = cmd.resp[0];
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, int highcap, u32 *ocrp);
+int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
#endif
if (err)
goto err;
+ /*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host, use_spi_crc);
+ if (err)
+ 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)
goto err;
}
/*
- * Set card RCA.
+ * For native busses: get card RCA and quit open drain mode.
*/
- err = mmc_send_relative_addr(host, &card->rca);
- if (err)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_send_relative_addr(host, &card->rca);
+ if (err)
+ goto free_card;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
if (!oldcard) {
/*
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err)
- goto free_card;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err)
+ goto free_card;
+ }
if (!oldcard) {
/*
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);
}
mmc_attach_bus(host, &mmc_sd_ops);
+ /*
+ * We need to get OCR a different way for SPI.
+ */
+ if (mmc_host_is_spi(host)) {
+ mmc_go_idle(host);
+
+ err = mmc_spi_read_ocr(host, 0, &ocr);
+ if (err)
+ goto err;
+ }
+
/*
* Sanity check the voltages that the card claims to
* support.
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);
return err;
/* Check that card supported application commands */
- if (!(cmd.resp[0] & R1_APP_CMD))
+ if (!mmc_host_is_spi(host) && !(cmd.resp[0] & R1_APP_CMD))
return -EOPNOTSUPP;
return 0;
memset(&mrq, 0, sizeof(struct mmc_request));
err = mmc_app_cmd(host, card);
- if (err)
+ if (err) {
+ /* no point in retrying; no APP commands allowed */
+ if (mmc_host_is_spi(host)) {
+ if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+ break;
+ }
continue;
+ }
memset(&mrq, 0, sizeof(struct mmc_request));
err = cmd->error;
if (!cmd->error)
break;
+
+ /* no point in retrying illegal APP commands */
+ if (mmc_host_is_spi(host)) {
+ if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
+ break;
+ }
}
return err;
memset(&cmd, 0, sizeof(struct mmc_command));
cmd.opcode = SD_APP_OP_COND;
- cmd.arg = ocr;
- cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
+ if (mmc_host_is_spi(host))
+ cmd.arg = ocr & (1 << 30); /* SPI only defines one bit */
+ else
+ cmd.arg = ocr;
+ 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)
break;
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ /* if we're just probing, do a single pass */
+ if (ocr == 0)
break;
+ /* otherwise wait until reset completes */
+ if (mmc_host_is_spi(host)) {
+ if (!(cmd.resp[0] & R1_SPI_IDLE))
+ break;
+ } else {
+ if (cmd.resp[0] & MMC_CARD_BUSY)
+ break;
+ }
+
err = -ETIMEDOUT;
mmc_delay(10);
}
- if (rocr)
+ if (rocr && !mmc_host_is_spi(host))
*rocr = cmd.resp[0];
return err;
struct mmc_command cmd;
int err;
static const u8 test_pattern = 0xAA;
+ u8 result_pattern;
/*
* To support SD 2.0 cards, we must always invoke SD_SEND_IF_COND
*/
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)
return err;
- if ((cmd.resp[0] & 0xFF) != test_pattern)
+ if (mmc_host_is_spi(host))
+ result_pattern = cmd.resp[1] & 0xFF;
+ else
+ result_pattern = cmd.resp[0] & 0xFF;
+
+ if (result_pattern != test_pattern)
return -EIO;
return 0;
BUG_ON(!card->host);
BUG_ON(!scr);
+ /* NOTE: caller guarantees scr is heap-allocated */
+
err = mmc_app_cmd(card->host, card);
if (err)
return err;
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;
BUG_ON(!card);
BUG_ON(!card->host);
+ /* NOTE: caller guarantees resp is heap-allocated */
+
mode = !!mode;
value &= 0xF;
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;
if (err)
goto err;
+ /*
+ * For SPI, enable CRC as appropriate.
+ */
+ if (mmc_host_is_spi(host)) {
+ err = mmc_spi_set_crc(host, use_spi_crc);
+ if (err)
+ goto err;
+ }
+
/*
* The number of functions on the card is encoded inside
* the ocr.
host->card = card;
/*
- * Set card RCA.
+ * For native busses: set card RCA and quit open drain mode.
*/
- err = mmc_send_relative_addr(host, &card->rca);
- if (err)
- goto remove;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_send_relative_addr(host, &card->rca);
+ if (err)
+ goto remove;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
+ }
/*
* Select card, as all following commands rely on that.
*/
- err = mmc_select_card(card);
- if (err)
- goto remove;
+ if (!mmc_host_is_spi(host)) {
+ err = mmc_select_card(card);
+ if (err)
+ goto remove;
+ }
/*
* Read the common registers.
cmd.opcode = SD_IO_SEND_OP_COND;
cmd.arg = ocr;
- cmd.flags = MMC_RSP_R4 | MMC_CMD_BCR;
+ cmd.flags = MMC_RSP_SPI_R4 | MMC_RSP_R4 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
if (err)
break;
- if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ /* if we're just probing, do a single pass */
+ if (ocr == 0)
break;
+ /* otherwise wait until reset completes */
+ if (mmc_host_is_spi(host)) {
+ /*
+ * Both R1_SPI_IDLE and MMC_CARD_BUSY indicate
+ * an initialized card under SPI, but some cards
+ * (Marvell's) only behave when looking at this
+ * one.
+ */
+ if (cmd.resp[1] & MMC_CARD_BUSY)
+ break;
+ } else {
+ if (cmd.resp[0] & MMC_CARD_BUSY)
+ break;
+ }
+
err = -ETIMEDOUT;
mmc_delay(10);
}
if (rocr)
- *rocr = cmd.resp[0];
+ *rocr = cmd.resp[mmc_host_is_spi(host) ? 1 : 0];
return err;
}
cmd.arg |= (write && out) ? 0x08000000 : 0x00000000;
cmd.arg |= addr << 9;
cmd.arg |= in;
- cmd.flags = MMC_RSP_R5 | MMC_CMD_AC;
+ cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, 0);
if (err)
return err;
- if (cmd.resp[0] & R5_ERROR)
- return -EIO;
- if (cmd.resp[0] & R5_FUNCTION_NUMBER)
- return -EINVAL;
- if (cmd.resp[0] & R5_OUT_OF_RANGE)
- return -ERANGE;
+ if (mmc_host_is_spi(card->host)) {
+ /* host driver already reported errors */
+ } else {
+ if (cmd.resp[0] & R5_ERROR)
+ return -EIO;
+ if (cmd.resp[0] & R5_FUNCTION_NUMBER)
+ return -EINVAL;
+ if (cmd.resp[0] & R5_OUT_OF_RANGE)
+ return -ERANGE;
+ }
- if (out)
- *out = cmd.resp[0] & 0xFF;
+ if (out) {
+ if (mmc_host_is_spi(card->host))
+ *out = (cmd.resp[0] >> 8) & 0xFF;
+ else
+ *out = cmd.resp[0] & 0xFF;
+ }
return 0;
}
cmd.arg |= (blksz == 512) ? 0 : blksz; /* byte mode */
else
cmd.arg |= 0x08000000 | blocks; /* block mode */
- cmd.flags = MMC_RSP_R5 | MMC_CMD_ADTC;
+ cmd.flags = MMC_RSP_SPI_R5 | MMC_RSP_R5 | MMC_CMD_ADTC;
data.blksz = blksz;
data.blocks = blocks;
if (data.error)
return data.error;
- if (cmd.resp[0] & R5_ERROR)
- return -EIO;
- if (cmd.resp[0] & R5_FUNCTION_NUMBER)
- return -EINVAL;
- if (cmd.resp[0] & R5_OUT_OF_RANGE)
- return -ERANGE;
+ if (mmc_host_is_spi(card->host)) {
+ /* host driver already reported errors */
+ } else {
+ if (cmd.resp[0] & R5_ERROR)
+ return -EIO;
+ if (cmd.resp[0] & R5_FUNCTION_NUMBER)
+ return -EINVAL;
+ if (cmd.resp[0] & R5_OUT_OF_RANGE)
+ return -ERANGE;
+ }
return 0;
}
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff