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path: root/drivers/mmc/mmc.c
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-rw-r--r--drivers/mmc/mmc.c542
1 files changed, 453 insertions, 89 deletions
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 3c5904834fe8..ceae379a4d4c 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -2,6 +2,8 @@
* linux/drivers/mmc/mmc.c
*
* Copyright (C) 2003-2004 Russell King, All Rights Reserved.
+ * SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
+ * SD support Copyright (C) 2005 Pierre Ossman, All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -16,6 +18,8 @@
#include <linux/delay.h>
#include <linux/pagemap.h>
#include <linux/err.h>
+#include <asm/scatterlist.h>
+#include <linux/scatterlist.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -172,7 +176,81 @@ int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries
EXPORT_SYMBOL(mmc_wait_for_cmd);
+/**
+ * mmc_wait_for_app_cmd - start an application command and wait for
+ completion
+ * @host: MMC host to start command
+ * @rca: RCA to send MMC_APP_CMD to
+ * @cmd: MMC command to start
+ * @retries: maximum number of retries
+ *
+ * Sends a MMC_APP_CMD, checks the card response, sends the command
+ * in the parameter and waits for it to complete. Return any error
+ * that occurred while the command was executing. Do not attempt to
+ * parse the response.
+ */
+int mmc_wait_for_app_cmd(struct mmc_host *host, unsigned int rca,
+ struct mmc_command *cmd, int retries)
+{
+ struct mmc_request mrq;
+ struct mmc_command appcmd;
+
+ int i, err;
+
+ BUG_ON(host->card_busy == NULL);
+ BUG_ON(retries < 0);
+
+ err = MMC_ERR_INVALID;
+
+ /*
+ * We have to resend MMC_APP_CMD for each attempt so
+ * we cannot use the retries field in mmc_command.
+ */
+ for (i = 0;i <= retries;i++) {
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ appcmd.opcode = MMC_APP_CMD;
+ appcmd.arg = rca << 16;
+ appcmd.flags = MMC_RSP_R1;
+ appcmd.retries = 0;
+ memset(appcmd.resp, 0, sizeof(appcmd.resp));
+ appcmd.data = NULL;
+
+ mrq.cmd = &appcmd;
+ appcmd.data = NULL;
+
+ mmc_wait_for_req(host, &mrq);
+
+ if (appcmd.error) {
+ err = appcmd.error;
+ continue;
+ }
+
+ /* Check that card supported application commands */
+ if (!(appcmd.resp[0] & R1_APP_CMD))
+ return MMC_ERR_FAILED;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ memset(cmd->resp, 0, sizeof(cmd->resp));
+ cmd->retries = 0;
+
+ mrq.cmd = cmd;
+ cmd->data = NULL;
+
+ mmc_wait_for_req(host, &mrq);
+ err = cmd->error;
+ if (cmd->error == MMC_ERR_NONE)
+ break;
+ }
+
+ return err;
+}
+
+EXPORT_SYMBOL(mmc_wait_for_app_cmd);
+
+static int mmc_select_card(struct mmc_host *host, struct mmc_card *card);
/**
* __mmc_claim_host - exclusively claim a host
@@ -206,16 +284,10 @@ int __mmc_claim_host(struct mmc_host *host, struct mmc_card *card)
spin_unlock_irqrestore(&host->lock, flags);
remove_wait_queue(&host->wq, &wait);
- if (card != (void *)-1 && host->card_selected != card) {
- struct mmc_command cmd;
-
- host->card_selected = card;
-
- cmd.opcode = MMC_SELECT_CARD;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1;
-
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (card != (void *)-1) {
+ err = mmc_select_card(host, card);
+ if (err != MMC_ERR_NONE)
+ return err;
}
return err;
@@ -245,6 +317,63 @@ void mmc_release_host(struct mmc_host *host)
EXPORT_SYMBOL(mmc_release_host);
+static int mmc_select_card(struct mmc_host *host, struct mmc_card *card)
+{
+ int err;
+ struct mmc_command cmd;
+
+ BUG_ON(host->card_busy == NULL);
+
+ if (host->card_selected == card)
+ return MMC_ERR_NONE;
+
+ host->card_selected = card;
+
+ cmd.opcode = MMC_SELECT_CARD;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ return err;
+
+ /*
+ * Default bus width is 1 bit.
+ */
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
+
+ /*
+ * We can only change the bus width of the selected
+ * card so therefore we have to put the handling
+ * here.
+ */
+ if (host->caps & MMC_CAP_4_BIT_DATA) {
+ /*
+ * The card is in 1 bit mode by default so
+ * we only need to change if it supports the
+ * wider version.
+ */
+ if (mmc_card_sd(card) &&
+ (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
+ struct mmc_command cmd;
+ cmd.opcode = SD_APP_SET_BUS_WIDTH;
+ cmd.arg = SD_BUS_WIDTH_4;
+ cmd.flags = MMC_RSP_R1;
+
+ err = mmc_wait_for_app_cmd(host, card->rca, &cmd,
+ CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ return err;
+
+ host->ios.bus_width = MMC_BUS_WIDTH_4;
+ }
+ }
+
+ host->ops->set_ios(host, &host->ios);
+
+ return MMC_ERR_NONE;
+}
+
/*
* Ensure that no card is selected.
*/
@@ -322,48 +451,69 @@ static void mmc_decode_cid(struct mmc_card *card)
memset(&card->cid, 0, sizeof(struct mmc_cid));
- /*
- * The selection of the format here is guesswork based upon
- * information people have sent to date.
- */
- switch (card->csd.mmca_vsn) {
- case 0: /* MMC v1.? */
- case 1: /* MMC v1.4 */
- card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
- card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
- card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
- card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
- card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
- card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
- card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
- card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
- card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
- card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
- card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
- card->cid.month = UNSTUFF_BITS(resp, 12, 4);
- card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
- break;
-
- case 2: /* MMC v2.x ? */
- case 3: /* MMC v3.x ? */
- card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
- card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
- card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
- card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
- card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
- card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
- card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
- card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
- card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
- card->cid.month = UNSTUFF_BITS(resp, 12, 4);
- card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
- break;
-
- default:
- printk("%s: card has unknown MMCA version %d\n",
- mmc_hostname(card->host), card->csd.mmca_vsn);
- mmc_card_set_bad(card);
- break;
+ if (mmc_card_sd(card)) {
+ /*
+ * SD doesn't currently have a version field so we will
+ * have to assume we can parse this.
+ */
+ card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
+ card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.hwrev = UNSTUFF_BITS(resp, 60, 4);
+ card->cid.fwrev = UNSTUFF_BITS(resp, 56, 4);
+ card->cid.serial = UNSTUFF_BITS(resp, 24, 32);
+ card->cid.year = UNSTUFF_BITS(resp, 12, 8);
+ card->cid.month = UNSTUFF_BITS(resp, 8, 4);
+
+ card->cid.year += 2000; /* SD cards year offset */
+ } else {
+ /*
+ * The selection of the format here is based upon published
+ * specs from sandisk and from what people have reported.
+ */
+ switch (card->csd.mmca_vsn) {
+ case 0: /* MMC v1.0 - v1.2 */
+ case 1: /* MMC v1.4 */
+ card->cid.manfid = UNSTUFF_BITS(resp, 104, 24);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
+ card->cid.prod_name[6] = UNSTUFF_BITS(resp, 48, 8);
+ card->cid.hwrev = UNSTUFF_BITS(resp, 44, 4);
+ card->cid.fwrev = UNSTUFF_BITS(resp, 40, 4);
+ card->cid.serial = UNSTUFF_BITS(resp, 16, 24);
+ card->cid.month = UNSTUFF_BITS(resp, 12, 4);
+ card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
+ break;
+
+ case 2: /* MMC v2.0 - v2.2 */
+ case 3: /* MMC v3.1 - v3.3 */
+ card->cid.manfid = UNSTUFF_BITS(resp, 120, 8);
+ card->cid.oemid = UNSTUFF_BITS(resp, 104, 16);
+ card->cid.prod_name[0] = UNSTUFF_BITS(resp, 96, 8);
+ card->cid.prod_name[1] = UNSTUFF_BITS(resp, 88, 8);
+ card->cid.prod_name[2] = UNSTUFF_BITS(resp, 80, 8);
+ card->cid.prod_name[3] = UNSTUFF_BITS(resp, 72, 8);
+ card->cid.prod_name[4] = UNSTUFF_BITS(resp, 64, 8);
+ card->cid.prod_name[5] = UNSTUFF_BITS(resp, 56, 8);
+ card->cid.serial = UNSTUFF_BITS(resp, 16, 32);
+ card->cid.month = UNSTUFF_BITS(resp, 12, 4);
+ card->cid.year = UNSTUFF_BITS(resp, 8, 4) + 1997;
+ break;
+
+ default:
+ printk("%s: card has unknown MMCA version %d\n",
+ mmc_hostname(card->host), card->csd.mmca_vsn);
+ mmc_card_set_bad(card);
+ break;
+ }
}
}
@@ -376,34 +526,86 @@ static void mmc_decode_csd(struct mmc_card *card)
unsigned int e, m, csd_struct;
u32 *resp = card->raw_csd;
- /*
- * We only understand CSD structure v1.1 and v2.
- * v2 has extra information in bits 15, 11 and 10.
- */
- csd_struct = UNSTUFF_BITS(resp, 126, 2);
- if (csd_struct != 1 && csd_struct != 2) {
- printk("%s: unrecognised CSD structure version %d\n",
- mmc_hostname(card->host), csd_struct);
- mmc_card_set_bad(card);
- return;
+ if (mmc_card_sd(card)) {
+ csd_struct = UNSTUFF_BITS(resp, 126, 2);
+ if (csd_struct != 0) {
+ printk("%s: unrecognised CSD structure version %d\n",
+ mmc_hostname(card->host), csd_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
+
+ m = UNSTUFF_BITS(resp, 115, 4);
+ e = UNSTUFF_BITS(resp, 112, 3);
+ csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+ csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+ m = UNSTUFF_BITS(resp, 99, 4);
+ e = UNSTUFF_BITS(resp, 96, 3);
+ csd->max_dtr = tran_exp[e] * tran_mant[m];
+ csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+
+ e = UNSTUFF_BITS(resp, 47, 3);
+ m = UNSTUFF_BITS(resp, 62, 12);
+ csd->capacity = (1 + m) << (e + 2);
+
+ csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+ } else {
+ /*
+ * We only understand CSD structure v1.1 and v1.2.
+ * v1.2 has extra information in bits 15, 11 and 10.
+ */
+ csd_struct = UNSTUFF_BITS(resp, 126, 2);
+ if (csd_struct != 1 && csd_struct != 2) {
+ printk("%s: unrecognised CSD structure version %d\n",
+ mmc_hostname(card->host), csd_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
+
+ csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
+ m = UNSTUFF_BITS(resp, 115, 4);
+ e = UNSTUFF_BITS(resp, 112, 3);
+ csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
+ csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
+
+ m = UNSTUFF_BITS(resp, 99, 4);
+ e = UNSTUFF_BITS(resp, 96, 3);
+ csd->max_dtr = tran_exp[e] * tran_mant[m];
+ csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+
+ e = UNSTUFF_BITS(resp, 47, 3);
+ m = UNSTUFF_BITS(resp, 62, 12);
+ csd->capacity = (1 + m) << (e + 2);
+
+ csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
}
+}
+
+/*
+ * Given a 64-bit response, decode to our card SCR structure.
+ */
+static void mmc_decode_scr(struct mmc_card *card)
+{
+ struct sd_scr *scr = &card->scr;
+ unsigned int scr_struct;
+ u32 resp[4];
- csd->mmca_vsn = UNSTUFF_BITS(resp, 122, 4);
- m = UNSTUFF_BITS(resp, 115, 4);
- e = UNSTUFF_BITS(resp, 112, 3);
- csd->tacc_ns = (tacc_exp[e] * tacc_mant[m] + 9) / 10;
- csd->tacc_clks = UNSTUFF_BITS(resp, 104, 8) * 100;
+ BUG_ON(!mmc_card_sd(card));
- m = UNSTUFF_BITS(resp, 99, 4);
- e = UNSTUFF_BITS(resp, 96, 3);
- csd->max_dtr = tran_exp[e] * tran_mant[m];
- csd->cmdclass = UNSTUFF_BITS(resp, 84, 12);
+ resp[3] = card->raw_scr[1];
+ resp[2] = card->raw_scr[0];
- e = UNSTUFF_BITS(resp, 47, 3);
- m = UNSTUFF_BITS(resp, 62, 12);
- csd->capacity = (1 + m) << (e + 2);
+ scr_struct = UNSTUFF_BITS(resp, 60, 4);
+ if (scr_struct != 0) {
+ printk("%s: unrecognised SCR structure version %d\n",
+ mmc_hostname(card->host), scr_struct);
+ mmc_card_set_bad(card);
+ return;
+ }
- csd->read_blkbits = UNSTUFF_BITS(resp, 80, 4);
+ scr->sda_vsn = UNSTUFF_BITS(resp, 56, 4);
+ scr->bus_widths = UNSTUFF_BITS(resp, 48, 4);
}
/*
@@ -457,6 +659,11 @@ static void mmc_idle_cards(struct mmc_host *host)
{
struct mmc_command cmd;
+ host->ios.chip_select = MMC_CS_HIGH;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
+
cmd.opcode = MMC_GO_IDLE_STATE;
cmd.arg = 0;
cmd.flags = MMC_RSP_NONE;
@@ -464,6 +671,11 @@ static void mmc_idle_cards(struct mmc_host *host)
mmc_wait_for_cmd(host, &cmd, 0);
mmc_delay(1);
+
+ host->ios.chip_select = MMC_CS_DONTCARE;
+ host->ops->set_ios(host, &host->ios);
+
+ mmc_delay(1);
}
/*
@@ -475,7 +687,9 @@ static void mmc_power_up(struct mmc_host *host)
host->ios.vdd = bit;
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
+ host->ios.chip_select = MMC_CS_DONTCARE;
host->ios.power_mode = MMC_POWER_UP;
+ host->ios.bus_width = MMC_BUS_WIDTH_1;
host->ops->set_ios(host, &host->ios);
mmc_delay(1);
@@ -492,7 +706,9 @@ static void mmc_power_off(struct mmc_host *host)
host->ios.clock = 0;
host->ios.vdd = 0;
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->ops->set_ios(host, &host->ios);
}
@@ -524,6 +740,34 @@ static int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
return err;
}
+static int mmc_send_app_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
+{
+ struct mmc_command cmd;
+ int i, err = 0;
+
+ cmd.opcode = SD_APP_OP_COND;
+ cmd.arg = ocr;
+ cmd.flags = MMC_RSP_R3;
+
+ for (i = 100; i; i--) {
+ err = mmc_wait_for_app_cmd(host, 0, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ break;
+
+ if (cmd.resp[0] & MMC_CARD_BUSY || ocr == 0)
+ break;
+
+ err = MMC_ERR_TIMEOUT;
+
+ mmc_delay(10);
+ }
+
+ if (rocr)
+ *rocr = cmd.resp[0];
+
+ return err;
+}
+
/*
* Discover cards by requesting their CID. If this command
* times out, it is not an error; there are no further cards
@@ -567,13 +811,38 @@ static void mmc_discover_cards(struct mmc_host *host)
card->state &= ~MMC_STATE_DEAD;
- cmd.opcode = MMC_SET_RELATIVE_ADDR;
- cmd.arg = card->rca << 16;
- cmd.flags = MMC_RSP_R1;
+ if (host->mode == MMC_MODE_SD) {
+ mmc_card_set_sd(card);
- err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
- if (err != MMC_ERR_NONE)
- mmc_card_set_dead(card);
+ cmd.opcode = SD_SEND_RELATIVE_ADDR;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ mmc_card_set_dead(card);
+ else {
+ card->rca = cmd.resp[0] >> 16;
+
+ if (!host->ops->get_ro) {
+ printk(KERN_WARNING "%s: host does not "
+ "support reading read-only "
+ "switch. assuming write-enable.\n",
+ mmc_hostname(host));
+ } else {
+ if (host->ops->get_ro(host))
+ mmc_card_set_readonly(card);
+ }
+ }
+ } else {
+ cmd.opcode = MMC_SET_RELATIVE_ADDR;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1;
+
+ err = mmc_wait_for_cmd(host, &cmd, CMD_RETRIES);
+ if (err != MMC_ERR_NONE)
+ mmc_card_set_dead(card);
+ }
}
}
@@ -605,6 +874,79 @@ static void mmc_read_csds(struct mmc_host *host)
}
}
+static void mmc_read_scrs(struct mmc_host *host)
+{
+ int err;
+ struct mmc_card *card;
+
+ struct mmc_request mrq;
+ struct mmc_command cmd;
+ struct mmc_data data;
+
+ struct scatterlist sg;
+
+ list_for_each_entry(card, &host->cards, node) {
+ if (card->state & (MMC_STATE_DEAD|MMC_STATE_PRESENT))
+ continue;
+ if (!mmc_card_sd(card))
+ continue;
+
+ err = mmc_select_card(host, card);
+ if (err != MMC_ERR_NONE) {
+ mmc_card_set_dead(card);
+ continue;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = MMC_APP_CMD;
+ cmd.arg = card->rca << 16;
+ cmd.flags = MMC_RSP_R1;
+
+ err = mmc_wait_for_cmd(host, &cmd, 0);
+ if ((err != MMC_ERR_NONE) || !(cmd.resp[0] & R1_APP_CMD)) {
+ mmc_card_set_dead(card);
+ continue;
+ }
+
+ memset(&cmd, 0, sizeof(struct mmc_command));
+
+ cmd.opcode = SD_APP_SEND_SCR;
+ cmd.arg = 0;
+ cmd.flags = MMC_RSP_R1;
+
+ memset(&data, 0, sizeof(struct mmc_data));
+
+ data.timeout_ns = card->csd.tacc_ns * 10;
+ data.timeout_clks = card->csd.tacc_clks * 10;
+ data.blksz_bits = 3;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+ data.sg = &sg;
+ data.sg_len = 1;
+
+ memset(&mrq, 0, sizeof(struct mmc_request));
+
+ mrq.cmd = &cmd;
+ mrq.data = &data;
+
+ sg_init_one(&sg, (u8*)card->raw_scr, 8);
+
+ err = mmc_wait_for_req(host, &mrq);
+ if (err != MMC_ERR_NONE) {
+ mmc_card_set_dead(card);
+ continue;
+ }
+
+ card->raw_scr[0] = ntohl(card->raw_scr[0]);
+ card->raw_scr[1] = ntohl(card->raw_scr[1]);
+
+ mmc_decode_scr(card);
+ }
+
+ mmc_deselect_cards(host);
+}
+
static unsigned int mmc_calculate_clock(struct mmc_host *host)
{
struct mmc_card *card;
@@ -657,12 +999,24 @@ static void mmc_setup(struct mmc_host *host)
int err;
u32 ocr;
+ host->mode = MMC_MODE_SD;
+
mmc_power_up(host);
mmc_idle_cards(host);
- err = mmc_send_op_cond(host, 0, &ocr);
- if (err != MMC_ERR_NONE)
- return;
+ err = mmc_send_app_op_cond(host, 0, &ocr);
+
+ /*
+ * If we fail to detect any SD cards then try
+ * searching for MMC cards.
+ */
+ if (err != MMC_ERR_NONE) {
+ host->mode = MMC_MODE_MMC;
+
+ err = mmc_send_op_cond(host, 0, &ocr);
+ if (err != MMC_ERR_NONE)
+ return;
+ }
host->ocr = mmc_select_voltage(host, ocr);
@@ -702,7 +1056,10 @@ static void mmc_setup(struct mmc_host *host)
* all get the idea that they should be ready for CMD2.
* (My SanDisk card seems to need this.)
*/
- mmc_send_op_cond(host, host->ocr, NULL);
+ if (host->mode == MMC_MODE_SD)
+ mmc_send_app_op_cond(host, host->ocr, NULL);
+ else
+ mmc_send_op_cond(host, host->ocr, NULL);
mmc_discover_cards(host);
@@ -713,19 +1070,26 @@ static void mmc_setup(struct mmc_host *host)
host->ops->set_ios(host, &host->ios);
mmc_read_csds(host);
+
+ if (host->mode == MMC_MODE_SD)
+ mmc_read_scrs(host);
}
/**
* mmc_detect_change - process change of state on a MMC socket
* @host: host which changed state.
+ * @delay: optional delay to wait before detection (jiffies)
*
* All we know is that card(s) have been inserted or removed
* from the socket(s). We don't know which socket or cards.
*/
-void mmc_detect_change(struct mmc_host *host)
+void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
- schedule_work(&host->detect);
+ if (delay)
+ schedule_delayed_work(&host->detect, delay);
+ else
+ schedule_work(&host->detect);
}
EXPORT_SYMBOL(mmc_detect_change);
@@ -829,7 +1193,7 @@ int mmc_add_host(struct mmc_host *host)
ret = mmc_add_host_sysfs(host);
if (ret == 0) {
mmc_power_off(host);
- mmc_detect_change(host);
+ mmc_detect_change(host, 0);
}
return ret;
@@ -899,7 +1263,7 @@ EXPORT_SYMBOL(mmc_suspend_host);
*/
int mmc_resume_host(struct mmc_host *host)
{
- mmc_detect_change(host);
+ mmc_detect_change(host, 0);
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 06:30:58 +0000