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authorTeresa Remmet <t.remmet@phytec.de>2018-06-07 10:25:10 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2018-06-08 08:01:52 +0200
commit82abcdfc63a7b1d2f6cbeda28a9a8299287818d1 (patch)
tree6b52ec02223128e72dc86bf585308804e91aaa3f
parent2b8c3fe861019a0ea67db23bfde82a22400c2b61 (diff)
downloadbarebox-82abcdfc63a7b1d2f6cbeda28a9a8299287818d1.tar.gz
commands: mmc_extcsd: Add support to write multibyte registers
It has been possible to write only the first byte of a multibyte register. Updated the command to write the complete value of a multibyte register at once. Signed-off-by: Teresa Remmet <t.remmet@phytec.de> Reviewed-by: Bastian Stender <bst@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
-rw-r--r--commands/mmc_extcsd.c44
1 files changed, 27 insertions, 17 deletions
diff --git a/commands/mmc_extcsd.c b/commands/mmc_extcsd.c
index acd23a4..82e0600 100644
--- a/commands/mmc_extcsd.c
+++ b/commands/mmc_extcsd.c
@@ -2306,10 +2306,8 @@ static int request_write_operation(void)
return 0;
}
-static void write_field(struct mci *mci, u8 *reg, u16 index, u8 value,
- int always_write)
+static int request_one_time_programmable(u16 index)
{
-
switch (index) {
case EXT_CSD_BOOT_CONFIG_PROT:
case EXT_CSD_BOOT_WP:
@@ -2349,18 +2347,15 @@ static void write_field(struct mci *mci, u8 *reg, u16 index, u8 value,
case 52:
case EXT_CSD_BARRIER_CTRL:
case EXT_CSD_SECURE_REMOVAL_TYPE:
- if (!always_write)
- if (request_write_operation() == 0) {
- printf("Abort write operation!\n");
- goto out;
- }
- break;
+ if (request_write_operation() == 0) {
+ printf("Abort write operation!\n");
+ return 1;
+ } else {
+ return 0;
+ }
}
- mci_switch(mci, index, value);
-
-out:
- return;
+ return 0;
}
static int do_mmc_extcsd(int argc, char *argv[])
@@ -2430,11 +2425,26 @@ static int do_mmc_extcsd(int argc, char *argv[])
if (!print_field(dst, index)) {
printf("No field with this index found. Abort write operation!\n");
} else {
- write_field(mci, dst, index, value, always_write);
+ struct extcsd_reg *ext;
+ int i;
+ int val = 0;
+
+ if (!always_write) {
+ retval = request_one_time_programmable(index);
+ if (retval)
+ goto error_with_mem;
+ }
+
+ ext = &extcsd[index];
+ for (i = 0; i < ext->width; i++) {
+ val = (value >> (i * 8)) & 0xFF;
+
+ mci_switch(mci, index + i, val);
+ retval = mci_send_ext_csd(mci, dst);
+ if (retval != 0)
+ goto error_with_mem;
+ }
printf("\nValue written!\n\n");
- retval = mci_send_ext_csd(mci, dst);
- if (retval != 0)
- goto error_with_mem;
print_field(dst, index);
}
else