mmc: sd: extracting erase related information from sd status
Add function to read SD_STATUS information.
According to the information, get erase_timeout/erase_size/erase_offset.
Add a structure sd_ssr to include the erase related information.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Bin Meng <bmeng.cn@gmail.com>
Cc: Stefan Wahren <stefan.wahren@i2se.com>
Cc: Clemens Gruber <clemens.gruber@pqgruber.com>
Cc: Kever Yang <kever.yang@rock-chips.com>
Cc: Eric Nelson <eric@nelint.com>
Cc: Stephen Warren <swarren@nvidia.com>
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index 43ea0bb..0312da9 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -21,6 +21,14 @@
#include <div64.h>
#include "mmc_private.h"
+static const unsigned int sd_au_size[] = {
+ 0, SZ_16K / 512, SZ_32K / 512,
+ SZ_64K / 512, SZ_128K / 512, SZ_256K / 512,
+ SZ_512K / 512, SZ_1M / 512, SZ_2M / 512,
+ SZ_4M / 512, SZ_8M / 512, (SZ_8M + SZ_4M) / 512,
+ SZ_16M / 512, (SZ_16M + SZ_8M) / 512, SZ_32M / 512, SZ_64M / 512,
+};
+
#ifndef CONFIG_DM_MMC_OPS
__weak int board_mmc_getwp(struct mmc *mmc)
{
@@ -945,6 +953,62 @@
return 0;
}
+static int sd_read_ssr(struct mmc *mmc)
+{
+ int err, i;
+ struct mmc_cmd cmd;
+ ALLOC_CACHE_ALIGN_BUFFER(uint, ssr, 16);
+ struct mmc_data data;
+ int timeout = 3;
+ unsigned int au, eo, et, es;
+
+ cmd.cmdidx = MMC_CMD_APP_CMD;
+ cmd.resp_type = MMC_RSP_R1;
+ cmd.cmdarg = mmc->rca << 16;
+
+ err = mmc_send_cmd(mmc, &cmd, NULL);
+ if (err)
+ return err;
+
+ cmd.cmdidx = SD_CMD_APP_SD_STATUS;
+ cmd.resp_type = MMC_RSP_R1;
+ cmd.cmdarg = 0;
+
+retry_ssr:
+ data.dest = (char *)ssr;
+ data.blocksize = 64;
+ data.blocks = 1;
+ data.flags = MMC_DATA_READ;
+
+ err = mmc_send_cmd(mmc, &cmd, &data);
+ if (err) {
+ if (timeout--)
+ goto retry_ssr;
+
+ return err;
+ }
+
+ for (i = 0; i < 16; i++)
+ ssr[i] = be32_to_cpu(ssr[i]);
+
+ au = (ssr[2] >> 12) & 0xF;
+ if ((au <= 9) || (mmc->version == SD_VERSION_3)) {
+ mmc->ssr.au = sd_au_size[au];
+ es = (ssr[3] >> 24) & 0xFF;
+ es |= (ssr[2] & 0xFF) << 8;
+ et = (ssr[3] >> 18) & 0x3F;
+ if (es && et) {
+ eo = (ssr[3] >> 16) & 0x3;
+ mmc->ssr.erase_timeout = (et * 1000) / es;
+ mmc->ssr.erase_offset = eo * 1000;
+ }
+ } else {
+ debug("Invalid Allocation Unit Size.\n");
+ }
+
+ return 0;
+}
+
/* frequency bases */
/* divided by 10 to be nice to platforms without floating point */
static const int fbase[] = {
@@ -1350,6 +1414,10 @@
mmc_set_bus_width(mmc, 4);
}
+ err = sd_read_ssr(mmc);
+ if (err)
+ return err;
+
if (mmc->card_caps & MMC_MODE_HS)
mmc->tran_speed = 50000000;
else