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[MMC] Add MMC command type flags

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Some hosts need to know the command type, so pass it via a set of
flags in cmd->flags.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2006-02-02 12:23:12 +00:00 committed by Russell King
parent a6df590dd8
commit e92251762d
8 changed files with 81 additions and 73 deletions
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53
drivers/mmc/au1xmmc.c
View File

@ -194,7 +194,7 @@ static int au1xmmc_send_command(struct au1xmmc_host *host, int wait,
u32 mmccmd = (cmd->opcode << SD_CMD_CI_SHIFT);
switch(cmd->flags) {
switch (mmc_rsp_type(cmd->flags)) {
case MMC_RSP_R1:
mmccmd |= SD_CMD_RT_1;
break;
@ -483,34 +483,35 @@ static void au1xmmc_cmd_complete(struct au1xmmc_host *host, u32 status)
cmd = mrq->cmd;
cmd->error = MMC_ERR_NONE;
if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT) {
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136) {
u32 r[4];
int i;
/* Techincally, we should be getting all 48 bits of the response
* (SD_RESP1 + SD_RESP2), but because our response omits the CRC,
* our data ends up being shifted 8 bits to the right. In this case,
* that means that the OSR data starts at bit 31, so we can just
* read RESP0 and return that
*/
r[0] = au_readl(host->iobase + SD_RESP3);
r[1] = au_readl(host->iobase + SD_RESP2);
r[2] = au_readl(host->iobase + SD_RESP1);
r[3] = au_readl(host->iobase + SD_RESP0);
cmd->resp[0] = au_readl(host->iobase + SD_RESP0);
}
else if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_LONG) {
u32 r[4];
int i;
/* The CRC is omitted from the response, so really
* we only got 120 bytes, but the engine expects
* 128 bits, so we have to shift things up
*/
r[0] = au_readl(host->iobase + SD_RESP3);
r[1] = au_readl(host->iobase + SD_RESP2);
r[2] = au_readl(host->iobase + SD_RESP1);
r[3] = au_readl(host->iobase + SD_RESP0);
/* The CRC is omitted from the response, so really we only got
* 120 bytes, but the engine expects 128 bits, so we have to shift
* things up
*/
for(i = 0; i < 4; i++) {
cmd->resp[i] = (r[i] & 0x00FFFFFF) << 8;
if (i != 3) cmd->resp[i] |= (r[i + 1] & 0xFF000000) >> 24;
for(i = 0; i < 4; i++) {
cmd->resp[i] = (r[i] & 0x00FFFFFF) << 8;
if (i != 3)
cmd->resp[i] |= (r[i + 1] & 0xFF000000) >> 24;
}
} else {
/* Techincally, we should be getting all 48 bits of
* the response (SD_RESP1 + SD_RESP2), but because
* our response omits the CRC, our data ends up
* being shifted 8 bits to the right. In this case,
* that means that the OSR data starts at bit 31,
* so we can just read RESP0 and return that
*/
cmd->resp[0] = au_readl(host->iobase + SD_RESP0);
}
}

28
drivers/mmc/mmc.c
View File

@ -211,7 +211,7 @@ int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
appcmd.opcode = MMC_APP_CMD;
appcmd.arg = rca << 16;
appcmd.flags = MMC_RSP_R1;
appcmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
appcmd.retries = 0;
memset(appcmd.resp, 0, sizeof(appcmd.resp));
appcmd.data = NULL;
@ -331,7 +331,7 @@ static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
cmd.opcode = MMC_SELECT_CARD;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE)
@ -358,7 +358,7 @@ static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
struct mmc_command cmd;
cmd.opcode = SD_APP_SET_BUS_WIDTH;
cmd.arg = SD_BUS_WIDTH_4;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_app_cmd(host, card->rca, &cmd,
CMD_RETRIES);
@ -386,7 +386,7 @@ static void mmc_deselect_cards(struct mmc_host *host)
cmd.opcode = MMC_SELECT_CARD;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE;
cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
mmc_wait_for_cmd(host, &cmd, 0);
}
@ -677,7 +677,7 @@ static void mmc_idle_cards(struct mmc_host *host)
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE;
cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
mmc_wait_for_cmd(host, &cmd, 0);
@ -738,7 +738,7 @@ static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
cmd.opcode = MMC_SEND_OP_COND;
cmd.arg = ocr;
cmd.flags = MMC_RSP_R3;
cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_cmd(host, &cmd, 0);
@ -766,7 +766,7 @@ static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
cmd.opcode = SD_APP_OP_COND;
cmd.arg = ocr;
cmd.flags = MMC_RSP_R3;
cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
for (i = 100; i; i--) {
err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES);
@ -805,7 +805,7 @@ static void mmc_discover_cards(struct mmc_host *host)
cmd.opcode = MMC_ALL_SEND_CID;
cmd.arg = 0;
cmd.flags = MMC_RSP_R2;
cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err == MMC_ERR_TIMEOUT) {
@ -835,7 +835,7 @@ static void mmc_discover_cards(struct mmc_host *host)
cmd.opcode = SD_SEND_RELATIVE_ADDR;
cmd.arg = 0;
cmd.flags = MMC_RSP_R6;
cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE)
@ -856,7 +856,7 @@ static void mmc_discover_cards(struct mmc_host *host)
} else {
cmd.opcode = MMC_SET_RELATIVE_ADDR;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE)
@ -878,7 +878,7 @@ static void mmc_read_csds(struct mmc_host *host)
cmd.opcode = MMC_SEND_CSD;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R2;
cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err != MMC_ERR_NONE) {
@ -920,7 +920,7 @@ static void mmc_read_scrs(struct mmc_host *host)
cmd.opcode = MMC_APP_CMD;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, 0);
if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) {
@ -932,7 +932,7 @@ static void mmc_read_scrs(struct mmc_host *host)
cmd.opcode = SD_APP_SEND_SCR;
cmd.arg = 0;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
memset(&data, 0, sizeof(struct mmc_data));
@ -1003,7 +1003,7 @@ static void mmc_check_cards(struct mmc_host *host)
cmd.opcode = MMC_SEND_STATUS;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
if (err == MMC_ERR_NONE)

8
drivers/mmc/mmc_block.c
View File

@ -171,14 +171,14 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
brq.mrq.data = &brq.data;
brq.cmd.arg = req->sector << 9;
brq.cmd.flags = MMC_RSP_R1;
brq.cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
brq.data.timeout_ns = card->csd.tacc_ns * 10;
brq.data.timeout_clks = card->csd.tacc_clks * 10;
brq.data.blksz_bits = md->block_bits;
brq.data.blocks = req->nr_sectors >> (md->block_bits - 9);
brq.stop.opcode = MMC_STOP_TRANSMISSION;
brq.stop.arg = 0;
brq.stop.flags = MMC_RSP_R1B;
brq.stop.flags = MMC_RSP_R1B | MMC_CMD_AC;
if (rq_data_dir(req) == READ) {
brq.cmd.opcode = brq.data.blocks > 1 ? MMC_READ_MULTIPLE_BLOCK : MMC_READ_SINGLE_BLOCK;
@ -223,7 +223,7 @@ static int mmc_blk_issue_rq(struct mmc_queue *mq, struct request *req)
cmd.opcode = MMC_SEND_STATUS;
cmd.arg = card->rca << 16;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, 5);
if (err) {
printk(KERN_ERR "%s: error %d requesting status\n",
@ -430,7 +430,7 @@ mmc_blk_set_blksize(struct mmc_blk_data *md, struct mmc_card *card)
mmc_card_claim_host(card);
cmd.opcode = MMC_SET_BLOCKLEN;
cmd.arg = 1 << md->block_bits;
cmd.flags = MMC_RSP_R1;
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
err = mmc_wait_for_cmd(card->host, &cmd, 5);
mmc_card_release_host(card);

11
drivers/mmc/mmci.c
View File

@ -124,15 +124,10 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
}
c |= cmd->opcode | MCI_CPSM_ENABLE;
switch (cmd->flags & MMC_RSP_MASK) {
case MMC_RSP_NONE:
default:
break;
case MMC_RSP_LONG:
c |= MCI_CPSM_LONGRSP;
case MMC_RSP_SHORT:
if (cmd->flags & MMC_RSP_PRESENT) {
if (cmd->flags & MMC_RSP_136)
c |= MCI_CPSM_LONGRSP;
c |= MCI_CPSM_RESPONSE;
break;
}
if (/*interrupt*/0)
c |= MCI_CPSM_INTERRUPT;

9
drivers/mmc/pxamci.c
View File

@ -178,14 +178,15 @@ static void pxamci_start_cmd(struct pxamci_host *host, struct mmc_command *cmd,
if (cmd->flags & MMC_RSP_BUSY)
cmdat |= CMDAT_BUSY;
switch (cmd->flags & (MMC_RSP_MASK | MMC_RSP_CRC)) {
case MMC_RSP_SHORT | MMC_RSP_CRC:
#define RSP_TYPE(x) ((x) & ~(MMC_RSP_BUSY|MMC_RSP_OPCODE))
switch (RSP_TYPE(mmc_resp_type(cmd))) {
case RSP_TYPE(MMC_RSP_R1): /* r1, r1b, r6 */
cmdat |= CMDAT_RESP_SHORT;
break;
case MMC_RSP_SHORT:
case RSP_TYPE(MMC_RSP_R3):
cmdat |= CMDAT_RESP_R3;
break;
case MMC_RSP_LONG | MMC_RSP_CRC:
case RSP_TYPE(MMC_RSP_R2):
cmdat |= CMDAT_RESP_R2;
break;
default:

8
drivers/mmc/wbsd.c
View File

@ -459,7 +459,7 @@ static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
/*
* Do we expect a reply?
*/
if ((cmd->flags & MMC_RSP_MASK) != MMC_RSP_NONE) {
if (cmd->flags & MMC_RSP_PRESENT) {
/*
* Read back status.
*/
@ -476,10 +476,10 @@ static void wbsd_send_command(struct wbsd_host *host, struct mmc_command *cmd)
cmd->error = MMC_ERR_BADCRC;
/* All ok */
else {
if ((cmd->flags & MMC_RSP_MASK) == MMC_RSP_SHORT)
wbsd_get_short_reply(host, cmd);
else
if (cmd->flags & MMC_RSP_136)
wbsd_get_long_reply(host, cmd);
else
wbsd_get_short_reply(host, cmd);
}
}

35
include/linux/mmc/mmc.h
View File

@ -21,24 +21,35 @@ struct mmc_command {
u32 arg;
u32 resp[4];
unsigned int flags; /* expected response type */
#define MMC_RSP_NONE (0 << 0)
#define MMC_RSP_SHORT (1 << 0)
#define MMC_RSP_LONG (2 << 0)
#define MMC_RSP_MASK (3 << 0)
#define MMC_RSP_CRC (1 << 3) /* expect valid crc */
#define MMC_RSP_BUSY (1 << 4) /* card may send busy */
#define MMC_RSP_OPCODE (1 << 5) /* response contains opcode */
#define MMC_RSP_PRESENT (1 << 0)
#define MMC_RSP_136 (1 << 1) /* 136 bit response */
#define MMC_RSP_CRC (1 << 2) /* expect valid crc */
#define MMC_RSP_BUSY (1 << 3) /* card may send busy */
#define MMC_RSP_OPCODE (1 << 4) /* response contains opcode */
#define MMC_CMD_MASK (3 << 5) /* command type */
#define MMC_CMD_AC (0 << 5)
#define MMC_CMD_ADTC (1 << 5)
#define MMC_CMD_BC (2 << 5)
#define MMC_CMD_BCR (3 << 5)
/*
* These are the response types, and correspond to valid bit
* patterns of the above flags. One additional valid pattern
* is all zeros, which means we don't expect a response.
*/
#define MMC_RSP_R1 (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1B (MMC_RSP_SHORT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
#define MMC_RSP_R2 (MMC_RSP_LONG|MMC_RSP_CRC)
#define MMC_RSP_R3 (MMC_RSP_SHORT)
#define MMC_RSP_R6 (MMC_RSP_SHORT|MMC_RSP_CRC)
#define MMC_RSP_NONE (0)
#define MMC_RSP_R1 (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE)
#define MMC_RSP_R1B (MMC_RSP_PRESENT|MMC_RSP_CRC|MMC_RSP_OPCODE|MMC_RSP_BUSY)
#define MMC_RSP_R2 (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC)
#define MMC_RSP_R3 (MMC_RSP_PRESENT)
#define MMC_RSP_R6 (MMC_RSP_PRESENT|MMC_RSP_CRC)
#define mmc_resp_type(cmd) ((cmd)->flags & (MMC_RSP_PRESENT|MMC_RSP_136|MMC_RSP_CRC|MMC_RSP_BUSY|MMC_RSP_OPCODE))
/*
* These are the command types.
*/
#define mmc_cmd_type(cmd) ((cmd)->flags & MMC_CMD_TYPE)
unsigned int retries; /* max number of retries */
unsigned int error; /* command error */

2
include/linux/mmc/protocol.h
View File

@ -79,7 +79,7 @@
/* SD commands type argument response */
/* class 8 */
/* This is basically the same command as for MMC with some quirks. */
#define SD_SEND_RELATIVE_ADDR 3 /* ac R6 */
#define SD_SEND_RELATIVE_ADDR 3 /* bcr R6 */
/* Application commands */
#define SD_APP_SET_BUS_WIDTH 6 /* ac [1:0] bus width R1 */