};
/* send data has no response at all */
+
+/* SPI */
+
+/* Version of the Greybus spi protocol we support */
+#define GB_SPI_VERSION_MAJOR 0x00
+#define GB_SPI_VERSION_MINOR 0x01
+
+/* Should match up with modes in linux/spi/spi.h */
+#define GB_SPI_MODE_CPHA 0x01 /* clock phase */
+#define GB_SPI_MODE_CPOL 0x02 /* clock polarity */
+#define GB_SPI_MODE_MODE_0 (0|0) /* (original MicroWire) */
+#define GB_SPI_MODE_MODE_1 (0|GB_SPI_MODE_CPHA)
+#define GB_SPI_MODE_MODE_2 (GB_SPI_MODE_CPOL|0)
+#define GB_SPI_MODE_MODE_3 (GB_SPI_MODE_CPOL|GB_SPI_MODE_CPHA)
+#define GB_SPI_MODE_CS_HIGH 0x04 /* chipselect active high? */
+#define GB_SPI_MODE_LSB_FIRST 0x08 /* per-word bits-on-wire */
+#define GB_SPI_MODE_3WIRE 0x10 /* SI/SO signals shared */
+#define GB_SPI_MODE_LOOP 0x20 /* loopback mode */
+#define GB_SPI_MODE_NO_CS 0x40 /* 1 dev/bus, no chipselect */
+#define GB_SPI_MODE_READY 0x80 /* slave pulls low to pause */
+
+/* Should match up with flags in linux/spi/spi.h */
+#define GB_SPI_FLAG_HALF_DUPLEX BIT(0) /* can't do full duplex */
+#define GB_SPI_FLAG_NO_RX BIT(1) /* can't do buffer read */
+#define GB_SPI_FLAG_NO_TX BIT(2) /* can't do buffer write */
+
+/* Greybus spi operation types */
+#define GB_SPI_TYPE_INVALID 0x00
+#define GB_SPI_TYPE_PROTOCOL_VERSION 0x01
+#define GB_SPI_TYPE_MODE 0x02
+#define GB_SPI_TYPE_FLAGS 0x03
+#define GB_SPI_TYPE_BITS_PER_WORD_MASK 0x04
+#define GB_SPI_TYPE_NUM_CHIPSELECT 0x05
+#define GB_SPI_TYPE_TRANSFER 0x06
+
+/* mode request has no payload */
+struct gb_spi_mode_response {
+ __le16 mode;
+};
+
+/* flags request has no payload */
+struct gb_spi_flags_response {
+ __le16 flags;
+};
+
+/* bits-per-word request has no payload */
+struct gb_spi_bpw_response {
+ __le32 bits_per_word_mask;
+};
+
+/* num-chipselects request has no payload */
+struct gb_spi_chipselect_response {
+ __le16 num_chipselect;
+};
+
+/**
+ * struct gb_spi_transfer - a read/write buffer pair
+ * @speed_hz: Select a speed other than the device default for this transfer. If
+ * 0 the default (from @spi_device) is used.
+ * @len: size of rx and tx buffers (in bytes)
+ * @delay_usecs: microseconds to delay after this transfer before (optionally)
+ * changing the chipselect status, then starting the next transfer or
+ * completing this spi_message.
+ * @cs_change: affects chipselect after this transfer completes
+ * @bits_per_word: select a bits_per_word other than the device default for this
+ * transfer. If 0 the default (from @spi_device) is used.
+ */
+struct gb_spi_transfer {
+ __le32 speed_hz;
+ __le32 len;
+ __le16 delay_usecs;
+ __u8 cs_change;
+ __u8 bits_per_word;
+};
+
+struct gb_spi_transfer_request {
+ __u8 chip_select; /* of the spi device */
+ __u8 mode; /* of the spi device */
+ __le16 count;
+ struct gb_spi_transfer transfers[0]; /* trnasfer_count of these */
+};
+
+struct gb_spi_transfer_response {
+ __u8 data[0]; /* inbound data */
+};
+
#endif /* __GB_GPBRIDGE_H__ */
#include <linux/spi/spi.h>
#include "greybus.h"
+#include "gpbridge.h"
struct gb_spi {
struct gb_connection *connection;
u16 num_chipselect;
};
-/* Version of the Greybus spi protocol we support */
-#define GB_SPI_VERSION_MAJOR 0x00
-#define GB_SPI_VERSION_MINOR 0x01
-
-/* Should match up with modes in linux/spi/spi.h */
-#define GB_SPI_MODE_CPHA 0x01 /* clock phase */
-#define GB_SPI_MODE_CPOL 0x02 /* clock polarity */
-#define GB_SPI_MODE_MODE_0 (0|0) /* (original MicroWire) */
-#define GB_SPI_MODE_MODE_1 (0|GB_SPI_MODE_CPHA)
-#define GB_SPI_MODE_MODE_2 (GB_SPI_MODE_CPOL|0)
-#define GB_SPI_MODE_MODE_3 (GB_SPI_MODE_CPOL|GB_SPI_MODE_CPHA)
-#define GB_SPI_MODE_CS_HIGH 0x04 /* chipselect active high? */
-#define GB_SPI_MODE_LSB_FIRST 0x08 /* per-word bits-on-wire */
-#define GB_SPI_MODE_3WIRE 0x10 /* SI/SO signals shared */
-#define GB_SPI_MODE_LOOP 0x20 /* loopback mode */
-#define GB_SPI_MODE_NO_CS 0x40 /* 1 dev/bus, no chipselect */
-#define GB_SPI_MODE_READY 0x80 /* slave pulls low to pause */
-
-/* Should match up with flags in linux/spi/spi.h */
-#define GB_SPI_FLAG_HALF_DUPLEX BIT(0) /* can't do full duplex */
-#define GB_SPI_FLAG_NO_RX BIT(1) /* can't do buffer read */
-#define GB_SPI_FLAG_NO_TX BIT(2) /* can't do buffer write */
-
-/* Greybus spi operation types */
-#define GB_SPI_TYPE_INVALID 0x00
-#define GB_SPI_TYPE_PROTOCOL_VERSION 0x01
-#define GB_SPI_TYPE_MODE 0x02
-#define GB_SPI_TYPE_FLAGS 0x03
-#define GB_SPI_TYPE_BITS_PER_WORD_MASK 0x04
-#define GB_SPI_TYPE_NUM_CHIPSELECT 0x05
-#define GB_SPI_TYPE_TRANSFER 0x06
-
-/* mode request has no payload */
-struct gb_spi_mode_response {
- __le16 mode;
-};
-
-/* flags request has no payload */
-struct gb_spi_flags_response {
- __le16 flags;
-};
-
-/* bits-per-word request has no payload */
-struct gb_spi_bpw_response {
- __le32 bits_per_word_mask;
-};
-
-/* num-chipselects request has no payload */
-struct gb_spi_chipselect_response {
- __le16 num_chipselect;
-};
-
-/**
- * struct gb_spi_transfer - a read/write buffer pair
- * @speed_hz: Select a speed other than the device default for this transfer. If
- * 0 the default (from @spi_device) is used.
- * @len: size of rx and tx buffers (in bytes)
- * @delay_usecs: microseconds to delay after this transfer before (optionally)
- * changing the chipselect status, then starting the next transfer or
- * completing this spi_message.
- * @cs_change: affects chipselect after this transfer completes
- * @bits_per_word: select a bits_per_word other than the device default for this
- * transfer. If 0 the default (from @spi_device) is used.
- */
-struct gb_spi_transfer {
- __le32 speed_hz;
- __le32 len;
- __le16 delay_usecs;
- __u8 cs_change;
- __u8 bits_per_word;
-};
-
-struct gb_spi_transfer_request {
- __u8 chip_select; /* of the spi device */
- __u8 mode; /* of the spi device */
- __le16 count;
- struct gb_spi_transfer transfers[0]; /* trnasfer_count of these */
-};
-
-struct gb_spi_transfer_response {
- __u8 data[0]; /* inbound data */
-};
-
/* Routines to transfer data */
static struct gb_operation *
gb_spi_operation_create(struct gb_connection *connection,
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