rpi3: Add SDHost driver
This commit adds SDHost driver for RaspberryPi3. SDHost driver uses the
GPIO driver to connect the SDCard and SDHost. By using this driver it is
able to read/write raw blocks on SDCard.
Signed-off-by: Ying-Chun Liu (PaulLiu) <paulliu@debian.org>
diff --git a/include/drivers/rpi3/sdhost/rpi3_sdhost.h b/include/drivers/rpi3/sdhost/rpi3_sdhost.h
new file mode 100644
index 0000000..bc906e3
--- /dev/null
+++ b/include/drivers/rpi3/sdhost/rpi3_sdhost.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 2019, Linaro Limited
+ * Copyright (c) 2019, Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RPI3_SDHOST_H
+#define RPI3_SDHOST_H
+
+#include <drivers/mmc.h>
+#include <stdint.h>
+#include <platform_def.h>
+
+struct rpi3_sdhost_params {
+ uintptr_t reg_base;
+ uint32_t clk_rate;
+ uint32_t bus_width;
+ uint32_t flags;
+ uint32_t current_cmd;
+ uint8_t cmdbusy;
+ uint8_t mmc_app_cmd;
+ uint32_t ns_per_fifo_word;
+ uint32_t crc_err_retries;
+
+ uint32_t sdcard_rca;
+ uint32_t gpio48_pinselect[6];
+};
+
+void rpi3_sdhost_init(struct rpi3_sdhost_params *params,
+ struct mmc_device_info *mmc_dev_info);
+void rpi3_sdhost_stop(void);
+
+/* Registers */
+#define HC_COMMAND 0x00 /* Command and flags */
+#define HC_ARGUMENT 0x04
+#define HC_TIMEOUTCOUNTER 0x08
+#define HC_CLOCKDIVISOR 0x0c
+#define HC_RESPONSE_0 0x10
+#define HC_RESPONSE_1 0x14
+#define HC_RESPONSE_2 0x18
+#define HC_RESPONSE_3 0x1c
+#define HC_HOSTSTATUS 0x20
+#define HC_POWER 0x30
+#define HC_DEBUG 0x34
+#define HC_HOSTCONFIG 0x38
+#define HC_BLOCKSIZE 0x3c
+#define HC_DATAPORT 0x40
+#define HC_BLOCKCOUNT 0x50
+
+/* Flags for HC_COMMAND register */
+#define HC_CMD_ENABLE 0x8000
+#define HC_CMD_FAILED 0x4000
+#define HC_CMD_BUSY 0x0800
+#define HC_CMD_RESPONSE_NONE 0x0400
+#define HC_CMD_RESPONSE_LONG 0x0200
+#define HC_CMD_WRITE 0x0080
+#define HC_CMD_READ 0x0040
+#define HC_CMD_COMMAND_MASK 0x003f
+
+#define HC_CLOCKDIVISOR_MAXVAL 0x07ff
+#define HC_CLOCKDIVISOR_PREFERVAL 0x027b
+#define HC_CLOCKDIVISOR_SLOWVAL 0x0148
+#define HC_CLOCKDIVISOR_STOPVAL 0x01fb
+
+/* Flags for HC_HOSTSTATUS register */
+#define HC_HSTST_HAVEDATA 0x0001
+#define HC_HSTST_ERROR_FIFO 0x0008
+#define HC_HSTST_ERROR_CRC7 0x0010
+#define HC_HSTST_ERROR_CRC16 0x0020
+#define HC_HSTST_TIMEOUT_CMD 0x0040
+#define HC_HSTST_TIMEOUT_DATA 0x0080
+#define HC_HSTST_INT_BLOCK 0x0200
+#define HC_HSTST_INT_BUSY 0x0400
+
+#define HC_HSTST_RESET 0xffff
+
+#define HC_HSTST_MASK_ERROR_DATA (HC_HSTST_ERROR_FIFO | \
+ HC_HSTST_ERROR_CRC7 | \
+ HC_HSTST_ERROR_CRC16 | \
+ HC_HSTST_TIMEOUT_DATA)
+
+#define HC_HSTST_MASK_ERROR_ALL (HC_HSTST_MASK_ERROR_DATA | \
+ HC_HSTST_TIMEOUT_CMD)
+
+/* Flags for HC_HOSTCONFIG register */
+#define HC_HSTCF_INTBUS_WIDE 0x0002
+#define HC_HSTCF_EXTBUS_4BIT 0x0004
+#define HC_HSTCF_SLOW_CARD 0x0008
+#define HC_HSTCF_INT_DATA 0x0010
+#define HC_HSTCF_INT_BLOCK 0x0100
+#define HC_HSTCF_INT_BUSY 0x0400
+
+/* Flags for HC_DEBUG register */
+#define HC_DBG_FIFO_THRESH_WRITE_SHIFT 9
+#define HC_DBG_FIFO_THRESH_READ_SHIFT 14
+#define HC_DBG_FIFO_THRESH_MASK 0x001f
+#define HC_DBG_FSM_MASK 0xf
+#define HC_DBG_FSM_IDENTMODE 0x0
+#define HC_DBG_FSM_DATAMODE 0x1
+#define HC_DBG_FSM_READDATA 0x2
+#define HC_DBG_FSM_WRITEDATA 0x3
+#define HC_DBG_FSM_READWAIT 0x4
+#define HC_DBG_FSM_READCRC 0x5
+#define HC_DBG_FSM_WRITECRC 0x6
+#define HC_DBG_FSM_WRITEWAIT1 0x7
+#define HC_DBG_FSM_POWERDOWN 0x8
+#define HC_DBG_FSM_POWERUP 0x9
+#define HC_DBG_FSM_WRITESTART1 0xa
+#define HC_DBG_FSM_WRITESTART2 0xb
+#define HC_DBG_FSM_GENPULSES 0xc
+#define HC_DBG_FSM_WRITEWAIT2 0xd
+#define HC_DBG_FSM_STARTPOWDOWN 0xf
+#define HC_DBG_FORCE_DATA_MODE 0x40000
+
+/* Settings */
+#define HC_FIFO_SIZE 16
+#define HC_FIFO_THRESH_READ 4
+#define HC_FIFO_THRESH_WRITE 4
+
+#define HC_TIMEOUT_DEFAULT 0x00f00000
+#define HC_TIMEOUT_IDLE 0x00a00000
+
+#endif /* RPI3_SDHOST_H */