Add SPI-NAND framework
This framework supports SPI-NAND and is based on the
SPI-MEM framework for SPI operations. It uses a common high
level access using the io_mtd.
It is limited to the read functionalities.
Default behavior is the basic one data line operation
but it could be overridden by platform.
Change-Id: Icb4e0887c4003a826f47c876479dd004a323a32b
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
diff --git a/include/drivers/spi_nand.h b/include/drivers/spi_nand.h
new file mode 100644
index 0000000..40e2063
--- /dev/null
+++ b/include/drivers/spi_nand.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2019, STMicroelectronics - All Rights Reserved
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef DRIVERS_SPI_NAND_H
+#define DRIVERS_SPI_NAND_H
+
+#include <drivers/nand.h>
+#include <drivers/spi_mem.h>
+
+#define SPI_NAND_OP_GET_FEATURE 0x0FU
+#define SPI_NAND_OP_SET_FEATURE 0x1FU
+#define SPI_NAND_OP_READ_ID 0x9FU
+#define SPI_NAND_OP_LOAD_PAGE 0x13U
+#define SPI_NAND_OP_RESET 0xFFU
+#define SPI_NAND_OP_READ_FROM_CACHE 0x03U
+#define SPI_NAND_OP_READ_FROM_CACHE_2X 0x3BU
+#define SPI_NAND_OP_READ_FROM_CACHE_4X 0x6BU
+
+/* Configuration register */
+#define SPI_NAND_REG_CFG 0xB0U
+#define SPI_NAND_CFG_ECC_EN BIT(4)
+#define SPI_NAND_CFG_QE BIT(0)
+
+/* Status register */
+#define SPI_NAND_REG_STATUS 0xC0U
+#define SPI_NAND_STATUS_BUSY BIT(0)
+#define SPI_NAND_STATUS_ECC_UNCOR BIT(5)
+
+struct spinand_device {
+ struct nand_device *nand_dev;
+ struct spi_mem_op spi_read_cache_op;
+ uint8_t cfg_cache; /* Cached value of SPI NAND device register CFG */
+};
+
+int spi_nand_init(unsigned long long *size, unsigned int *erase_size);
+
+/*
+ * Platform can implement this to override default SPI-NAND instance
+ * configuration.
+ *
+ * @device: target SPI-NAND instance.
+ * Return 0 on success, negative value otherwise.
+ */
+int plat_get_spi_nand_data(struct spinand_device *device);
+
+#endif /* DRIVERS_SPI_NAND_H */