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-rw-r--r--meta-amdfalconx86/recipes-kernel/amd-spi/files/spirom.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/meta-amdfalconx86/recipes-kernel/amd-spi/files/spirom.h b/meta-amdfalconx86/recipes-kernel/amd-spi/files/spirom.h
new file mode 100644
index 00000000..941b357a
--- /dev/null
+++ b/meta-amdfalconx86/recipes-kernel/amd-spi/files/spirom.h
@@ -0,0 +1,53 @@
+#ifndef SPIROM_H
+#define SPIROM_H
+
+#include <linux/types.h>
+
+/*---------------------------------------------------------------------------*/
+
+/* IOCTL commands */
+
+#define SPI_IOC_MAGIC 'k'
+
+#define TRANSMIT 1
+#define RECEIVE 2
+
+/*
+ * struct spi_ioc_transfer - interface structure between application and ioctl
+ *
+ * @buf: Buffer to hold 1-byte command, 3-bytes address, and 64-byte data for
+ * transmit or receive. The internal FIFO of our controller can hold a
+ * maximum of 70 bytes, including the address. But here we assume the
+ * maximum data excluding address to be 64-bytes long.
+ *
+ * @direction: Direction of data transfer, either TRANSMIT or RECEIVE.
+ *
+ * @len: Length of data excluding command and address.
+ *
+ * @addr_present: Flag to indicate whether 'buf' above contains an address.
+ */
+struct spi_ioc_transfer {
+ __u8 buf[64 + 1 + 3];
+ __u8 direction;
+ __u8 len;
+ __u8 addr_present;
+};
+
+/* not all platforms use <asm-generic/ioctl.h> or _IOC_TYPECHECK() ... */
+#define SPI_MSGSIZE(N) \
+ ((((N)*(sizeof (struct spi_ioc_transfer))) < (1 << _IOC_SIZEBITS)) \
+ ? ((N)*(sizeof (struct spi_ioc_transfer))) : 0)
+#define SPI_IOC_MESSAGE(N) _IOW(SPI_IOC_MAGIC, 0, char[SPI_MSGSIZE(N)])
+
+/* SPI ROM command codes */
+#define ROM_WREN 0x06
+#define ROM_WRDI 0x04
+#define ROM_RDSR 0x05
+#define ROM_RDID 0x9F
+#define ROM_CHIP_ERASE 0x60
+#define ROM_SECTOR_ERASE 0x20
+#define ROM_BLOCK_ERASE 0xD8
+#define ROM_READ 0x03
+#define ROM_WRITE 0x02
+
+#endif /* SPIROM_H */