Most cards do not answer if some reserved bits
in the ocr are set. However, some controllers
can set bit 7 (reserved for low voltages), but
how to manage low voltages SD card is not yet
specified.
based on the original U-Boot patch from
Stefano Babic <sbabic@xxxxxxx>
Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
---
drivers/mci/mci-core.c | 12 +++++++++++-
1 files changed, 11 insertions(+), 1 deletions(-)
diff --git a/drivers/mci/mci-core.c b/drivers/mci/mci-core.c
index 0137152..f3d975d 100644
--- a/drivers/mci/mci-core.c
+++ b/drivers/mci/mci-core.c
@@ -215,6 +215,16 @@ static int sd_send_op_cond(struct device_d *mci_dev)
struct mci_cmd cmd;
int timeout = 1000;
int err;
+ unsigned voltages;
+
+ /*
+ * Most cards do not answer if some reserved bits
+ * in the ocr are set. However, Some controller
+ * can set bit 7 (reserved for low voltages), but
+ * how to manage low voltages SD card is not yet
+ * specified.
+ */
+ voltages = host->voltages & 0xff8000;
do {
mci_setup_cmd(&cmd, MMC_CMD_APP_CMD, 0, MMC_RSP_R1);
@@ -225,7 +235,7 @@ static int sd_send_op_cond(struct device_d *mci_dev)
}
mci_setup_cmd(&cmd, SD_CMD_APP_SEND_OP_COND,
- host->voltages | (mci->version == SD_VERSION_2 ? OCR_HCS : 0),
+ voltages | (mci->version == SD_VERSION_2 ? OCR_HCS : 0),
MMC_RSP_R3);
err = mci_send_cmd(mci_dev, &cmd, NULL);
if (err) {
--
1.7.2.3
_______________________________________________
barebox mailing list
barebox@xxxxxxxxxxxxxxxxxxx
http://lists.infradead.org/mailman/listinfo/barebox
