greybus: spi: Move structure definitions into gpbridge.h
In order to facilitate re-use of spi structures, split them out of independent files and add them into a shared gpbridge.h This will be a prereq to sharing these headers w/ gbsim. Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
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Viresh Kumar
Greg Kroah-Hartman
parent
8de925b973
commit
4890f31966
@ -403,4 +403,90 @@ struct gb_i2s_send_data_request {
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};
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/* send data has no response at all */
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/* SPI */
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/* Version of the Greybus spi protocol we support */
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#define GB_SPI_VERSION_MAJOR 0x00
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#define GB_SPI_VERSION_MINOR 0x01
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/* Should match up with modes in linux/spi/spi.h */
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#define GB_SPI_MODE_CPHA 0x01 /* clock phase */
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#define GB_SPI_MODE_CPOL 0x02 /* clock polarity */
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#define GB_SPI_MODE_MODE_0 (0|0) /* (original MicroWire) */
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#define GB_SPI_MODE_MODE_1 (0|GB_SPI_MODE_CPHA)
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#define GB_SPI_MODE_MODE_2 (GB_SPI_MODE_CPOL|0)
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#define GB_SPI_MODE_MODE_3 (GB_SPI_MODE_CPOL|GB_SPI_MODE_CPHA)
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#define GB_SPI_MODE_CS_HIGH 0x04 /* chipselect active high? */
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#define GB_SPI_MODE_LSB_FIRST 0x08 /* per-word bits-on-wire */
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#define GB_SPI_MODE_3WIRE 0x10 /* SI/SO signals shared */
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#define GB_SPI_MODE_LOOP 0x20 /* loopback mode */
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#define GB_SPI_MODE_NO_CS 0x40 /* 1 dev/bus, no chipselect */
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#define GB_SPI_MODE_READY 0x80 /* slave pulls low to pause */
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/* Should match up with flags in linux/spi/spi.h */
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#define GB_SPI_FLAG_HALF_DUPLEX BIT(0) /* can't do full duplex */
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#define GB_SPI_FLAG_NO_RX BIT(1) /* can't do buffer read */
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#define GB_SPI_FLAG_NO_TX BIT(2) /* can't do buffer write */
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/* Greybus spi operation types */
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#define GB_SPI_TYPE_INVALID 0x00
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#define GB_SPI_TYPE_PROTOCOL_VERSION 0x01
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#define GB_SPI_TYPE_MODE 0x02
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#define GB_SPI_TYPE_FLAGS 0x03
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#define GB_SPI_TYPE_BITS_PER_WORD_MASK 0x04
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#define GB_SPI_TYPE_NUM_CHIPSELECT 0x05
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#define GB_SPI_TYPE_TRANSFER 0x06
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/* mode request has no payload */
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struct gb_spi_mode_response {
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__le16 mode;
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};
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/* flags request has no payload */
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struct gb_spi_flags_response {
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__le16 flags;
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};
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/* bits-per-word request has no payload */
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struct gb_spi_bpw_response {
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__le32 bits_per_word_mask;
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};
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/* num-chipselects request has no payload */
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struct gb_spi_chipselect_response {
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__le16 num_chipselect;
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};
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/**
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* struct gb_spi_transfer - a read/write buffer pair
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* @speed_hz: Select a speed other than the device default for this transfer. If
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* 0 the default (from @spi_device) is used.
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* @len: size of rx and tx buffers (in bytes)
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* @delay_usecs: microseconds to delay after this transfer before (optionally)
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* changing the chipselect status, then starting the next transfer or
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* completing this spi_message.
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* @cs_change: affects chipselect after this transfer completes
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* @bits_per_word: select a bits_per_word other than the device default for this
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* transfer. If 0 the default (from @spi_device) is used.
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*/
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struct gb_spi_transfer {
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__le32 speed_hz;
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__le32 len;
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__le16 delay_usecs;
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__u8 cs_change;
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__u8 bits_per_word;
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};
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struct gb_spi_transfer_request {
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__u8 chip_select; /* of the spi device */
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__u8 mode; /* of the spi device */
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__le16 count;
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struct gb_spi_transfer transfers[0]; /* trnasfer_count of these */
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};
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struct gb_spi_transfer_response {
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__u8 data[0]; /* inbound data */
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};
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#endif /* __GB_GPBRIDGE_H__ */
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@ -14,6 +14,7 @@
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#include <linux/spi/spi.h>
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#include "greybus.h"
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#include "gpbridge.h"
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struct gb_spi {
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struct gb_connection *connection;
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@ -43,89 +44,6 @@ struct gb_spi {
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u16 num_chipselect;
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};
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/* Version of the Greybus spi protocol we support */
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#define GB_SPI_VERSION_MAJOR 0x00
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#define GB_SPI_VERSION_MINOR 0x01
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/* Should match up with modes in linux/spi/spi.h */
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#define GB_SPI_MODE_CPHA 0x01 /* clock phase */
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#define GB_SPI_MODE_CPOL 0x02 /* clock polarity */
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#define GB_SPI_MODE_MODE_0 (0|0) /* (original MicroWire) */
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#define GB_SPI_MODE_MODE_1 (0|GB_SPI_MODE_CPHA)
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#define GB_SPI_MODE_MODE_2 (GB_SPI_MODE_CPOL|0)
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#define GB_SPI_MODE_MODE_3 (GB_SPI_MODE_CPOL|GB_SPI_MODE_CPHA)
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#define GB_SPI_MODE_CS_HIGH 0x04 /* chipselect active high? */
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#define GB_SPI_MODE_LSB_FIRST 0x08 /* per-word bits-on-wire */
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#define GB_SPI_MODE_3WIRE 0x10 /* SI/SO signals shared */
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#define GB_SPI_MODE_LOOP 0x20 /* loopback mode */
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#define GB_SPI_MODE_NO_CS 0x40 /* 1 dev/bus, no chipselect */
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#define GB_SPI_MODE_READY 0x80 /* slave pulls low to pause */
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/* Should match up with flags in linux/spi/spi.h */
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#define GB_SPI_FLAG_HALF_DUPLEX BIT(0) /* can't do full duplex */
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#define GB_SPI_FLAG_NO_RX BIT(1) /* can't do buffer read */
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#define GB_SPI_FLAG_NO_TX BIT(2) /* can't do buffer write */
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/* Greybus spi operation types */
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#define GB_SPI_TYPE_INVALID 0x00
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#define GB_SPI_TYPE_PROTOCOL_VERSION 0x01
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#define GB_SPI_TYPE_MODE 0x02
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#define GB_SPI_TYPE_FLAGS 0x03
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#define GB_SPI_TYPE_BITS_PER_WORD_MASK 0x04
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#define GB_SPI_TYPE_NUM_CHIPSELECT 0x05
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#define GB_SPI_TYPE_TRANSFER 0x06
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/* mode request has no payload */
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struct gb_spi_mode_response {
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__le16 mode;
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};
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/* flags request has no payload */
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struct gb_spi_flags_response {
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__le16 flags;
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};
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/* bits-per-word request has no payload */
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struct gb_spi_bpw_response {
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__le32 bits_per_word_mask;
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};
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/* num-chipselects request has no payload */
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struct gb_spi_chipselect_response {
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__le16 num_chipselect;
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};
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/**
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* struct gb_spi_transfer - a read/write buffer pair
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* @speed_hz: Select a speed other than the device default for this transfer. If
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* 0 the default (from @spi_device) is used.
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* @len: size of rx and tx buffers (in bytes)
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* @delay_usecs: microseconds to delay after this transfer before (optionally)
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* changing the chipselect status, then starting the next transfer or
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* completing this spi_message.
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* @cs_change: affects chipselect after this transfer completes
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* @bits_per_word: select a bits_per_word other than the device default for this
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* transfer. If 0 the default (from @spi_device) is used.
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*/
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struct gb_spi_transfer {
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__le32 speed_hz;
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__le32 len;
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__le16 delay_usecs;
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__u8 cs_change;
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__u8 bits_per_word;
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};
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struct gb_spi_transfer_request {
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__u8 chip_select; /* of the spi device */
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__u8 mode; /* of the spi device */
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__le16 count;
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struct gb_spi_transfer transfers[0]; /* trnasfer_count of these */
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};
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struct gb_spi_transfer_response {
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__u8 data[0]; /* inbound data */
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};
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/* Routines to transfer data */
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static struct gb_operation *
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gb_spi_operation_create(struct gb_connection *connection,
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