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....@nxp.com>
Cc: Jaehoon Chung <jh80.ch...@samsung.com>
Cc: Simon Glass <s...@chromium.org>
Cc: Bin Meng <bmeng...@gmail.com>
Cc: Stefan Wahren <stefan.wah...@i2se.com>
Cc: Clemens Gruber <clemens.gru...@pqgruber.com>
Cc: Kever Yang <kever.y...@rock-chips.com>
Cc: Eric Nelson <e...@nelint.com>
Cc: Stephen Warren <swar...@nvidia.com>
---
V4:
include linux/sizes.h in mmc.h to avoid build break.
I dropped patch [2,3,4]/5 in V2, which is not a must in this optimization case.
V3:
No change.
V2:
Address Jaehoon's comments for V1
drivers/mmc/mmc.c | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
include/mmc.h | 9 ++++++++
2 files changed, 77 insertions(+)
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 @@ retry_scr:
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 @@ static int mmc_startup(struct mmc *mmc)
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
diff --git a/include/mmc.h b/include/mmc.h
index aa6d5d1..e815eb3 100644
--- a/include/mmc.h
+++ b/include/mmc.h
@@ -11,6 +11,7 @@
#define _MMC_H_
#include <linux/list.h>
+#include <linux/sizes.h>
#include <linux/compiler.h>
#include <part.h>
@@ -102,6 +103,7 @@
#define SD_CMD_SWITCH_UHS18V 11
#define SD_CMD_APP_SET_BUS_WIDTH 6
+#define SD_CMD_APP_SD_STATUS 13
#define SD_CMD_ERASE_WR_BLK_START 32
#define SD_CMD_ERASE_WR_BLK_END 33
#define SD_CMD_APP_SEND_OP_COND 41
@@ -392,6 +394,12 @@ struct mmc_config {
unsigned char part_type;
};
+struct sd_ssr {
+ unsigned int au; /* In sectors */
+ unsigned int erase_timeout; /* In milliseconds */
+ unsigned int erase_offset; /* In milliseconds */
+};
+
/*
* With CONFIG_DM_MMC enabled, struct mmc can be accessed from the MMC device
* with mmc_get_mmc_dev().
@@ -426,6 +434,7 @@ struct mmc {
uint write_bl_len;
uint erase_grp_size; /* in 512-byte sectors */
uint hc_wp_grp_size; /* in 512-byte sectors */
+ struct sd_ssr ssr; /* SD status register */
u64 capacity;
u64 capacity_user;
u64 capacity_boot;
--
2.6.2
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