1 files changed, 82 insertions, 0 deletions
diff --git a/src/drivers/ao_sdcard.h b/src/drivers/ao_sdcard.h
new file mode 100644
index 00000000..50b70c73
--- /dev/null
+++ b/src/drivers/ao_sdcard.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright © 2013 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#ifndef _AO_SDCARD_H_
+#define _AO_SDCARD_H_
+
+uint8_t
+ao_sdcard_read_block(uint32_t block, uint8_t *data);
+
+uint8_t
+ao_sdcard_write_block(uint32_t block, uint8_t *data);
+
+void
+ao_sdcard_init(void);
+
+/* Commands */
+#define SDCARD_GO_IDLE_STATE		0
+#define SDCARD_SEND_OP_COND		1
+#define SDCARD_SEND_IF_COND		8
+#define SDCARD_SEND_CSD			9
+#define SDCARD_SEND_CID			10
+#define SDCARD_SEND_STATUS		13
+#define SDCARD_SET_BLOCKLEN		16
+#define SDCARD_READ_BLOCK		17
+#define SDCARD_WRITE_BLOCK		24
+#define SDCARD_WRITE_MULTIPLE_BLOCK	25
+#define SDCARD_ERASE_WR_BLK_START	32
+#define SDCARD_ERASE_WR_BLK_END		33
+#define SDCARD_ERASE			38
+#define SDCARD_APP_CMD			55
+#define SDCARD_READ_OCR			58
+
+/* App commands */
+#define SDCARD_APP_SET_WR_BLK_ERASE_COUNT	23
+#define SDCARD_APP_SEND_OP_COMD			41
+
+/* Status */
+#define SDCARD_STATUS_READY_STATE	0x00
+#define SDCARD_STATUS_IDLE_STATE	0x01
+#define SDCARD_STATUS_ERASE_RESET	0x02
+#define SDCARD_STATUS_ILLEGAL_COMMAND	0x04
+#define SDCARD_STATUS_COM_CRC_ERROR	0x08
+#define SDCARD_STATUS_ERASE_SEQ_ERROR	0x10
+#define SDCARD_STATUS_ADDRESS_ERROR	0x20
+#define SDCARD_STATUS_PARAMETER_ERROR	0x40
+#define SDCARD_STATUS_TIMEOUT		0xff
+
+#define SDCARD_DATA_START_BLOCK		0xfe
+#define SDCARD_STOP_TRAN_TOKEN		0xfd
+#define SDCARD_WRITE_MULTIPLE_TOKEN	0xfc
+#define SDCARD_DATA_RES_MASK		0x1f
+#define SDCARD_DATA_RES_ACCEPTED	0x05
+
+#define SDCARD_CMD_TIMEOUT		AO_MS_TO_TICKS(20)
+#define SDCARD_BUSY_TIMEOUT		AO_MS_TO_TICKS(20)
+#define SDCARD_BLOCK_TIMEOUT		AO_MS_TO_TICKS(200)
+#define SDCARD_IDLE_RETRY		10
+#define SDCARD_OP_COND_RETRY		10
+
+enum ao_sdtype {
+	ao_sdtype_unknown,
+	ao_sdtype_mmc3,
+	ao_sdtype_sd1,
+	ao_sdtype_sd2byte,
+	ao_sdtype_sd2block,
+};
+
+#endif /* _AO_SDCARD_H_ */