/* SPI TX operation modes */
#define SPI_OPM_TX_QPP (1 << 0)
+#define SPI_OPM_TX_BP (1 << 1)
/* SPI RX operation modes */
#define SPI_OPM_RX_AS (1 << 0)
-#define SPI_OPM_RX_DOUT (1 << 1)
-#define SPI_OPM_RX_DIO (1 << 2)
-#define SPI_OPM_RX_QOF (1 << 3)
-#define SPI_OPM_RX_QIOF (1 << 4)
-#define SPI_OPM_RX_EXTN (SPI_OPM_RX_AS | SPI_OPM_RX_DOUT | \
+#define SPI_OPM_RX_AF (1 << 1)
+#define SPI_OPM_RX_DOUT (1 << 2)
+#define SPI_OPM_RX_DIO (1 << 3)
+#define SPI_OPM_RX_QOF (1 << 4)
+#define SPI_OPM_RX_QIOF (1 << 5)
+#define SPI_OPM_RX_EXTN (SPI_OPM_RX_AS | SPI_OPM_RX_AF | SPI_OPM_RX_DOUT | \
SPI_OPM_RX_DIO | SPI_OPM_RX_QOF | \
SPI_OPM_RX_QIOF)
/* Header byte that marks the start of the message */
#define SPI_PREAMBLE_END_BYTE 0xec
-#define SPI_DEFAULT_WORDLEN 8
+#define SPI_DEFAULT_WORDLEN 8
#ifdef CONFIG_DM_SPI
+/* TODO(sjg@chromium.org): Remove this and use max_hz from struct spi_slave */
struct dm_spi_bus {
uint max_hz;
};
+/**
+ * struct dm_spi_platdata - platform data for all SPI slaves
+ *
+ * This describes a SPI slave, a child device of the SPI bus. To obtain this
+ * struct from a spi_slave, use dev_get_parent_platdata(dev) or
+ * dev_get_parent_platdata(slave->dev).
+ *
+ * This data is immuatable. Each time the device is probed, @max_hz and @mode
+ * will be copied to struct spi_slave.
+ *
+ * @cs: Chip select number (0..n-1)
+ * @max_hz: Maximum bus speed that this slave can tolerate
+ * @mode: SPI mode to use for this device (see SPI mode flags)
+ */
+struct dm_spi_slave_platdata {
+ unsigned int cs;
+ uint max_hz;
+ uint mode;
+};
+
#endif /* CONFIG_DM_SPI */
/**
* struct spi_slave - Representation of a SPI slave
*
* For driver model this is the per-child data used by the SPI bus. It can
- * be accessed using dev_get_parentdata() on the slave device. Each SPI
- * driver should define this child data in its U_BOOT_DRIVER() definition:
- *
- * .per_child_auto_alloc_size = sizeof(struct spi_slave),
+ * be accessed using dev_get_parentdata() on the slave device. The SPI uclass
+ * sets uip per_child_auto_alloc_size to sizeof(struct spi_slave), and the
+ * driver should not override it. Two platform data fields (max_hz and mode)
+ * are copied into this structure to provide an initial value. This allows
+ * them to be changed, since we should never change platform data in drivers.
*
* If not using driver model, drivers are expected to extend this with
* controller-specific data.
* @dev: SPI slave device
* @max_hz: Maximum speed for this slave
* @mode: SPI mode to use for this slave (see SPI mode flags)
+ * @speed: Current bus speed. This is 0 until the bus is first
+ * claimed.
* @bus: ID of the bus that the slave is attached to. For
* driver model this is the sequence number of the SPI
* bus (bus->seq) so does not need to be stored
#ifdef CONFIG_DM_SPI
struct udevice *dev; /* struct spi_slave is dev->parentdata */
uint max_hz;
+ uint speed;
uint mode;
#else
unsigned int bus;
-#endif
unsigned int cs;
+#endif
u8 op_mode_rx;
u8 op_mode_tx;
unsigned int wordlen;
* allowed to claim the same bus for several slaves without releasing
* the bus in between.
*
- * @bus: The SPI slave
+ * @dev: The SPI slave
*
* Returns: 0 if the bus was claimed successfully, or a negative value
* if it wasn't.
*/
- int (*claim_bus)(struct udevice *bus);
+ int (*claim_bus)(struct udevice *dev);
/**
* Release the SPI bus
* all transfers have finished. It may disable any SPI hardware as
* appropriate.
*
- * @bus: The SPI slave
+ * @dev: The SPI slave
*/
- int (*release_bus)(struct udevice *bus);
+ int (*release_bus)(struct udevice *dev);
/**
* Set the word length for SPI transactions
*
* Returns: 0 on success, -ve on failure.
*/
- int (*set_wordlen)(struct udevice *bus, unsigned int wordlen);
+ int (*set_wordlen)(struct udevice *dev, unsigned int wordlen);
/**
* SPI transfer
int spi_find_chip_select(struct udevice *bus, int cs, struct udevice **devp);
/**
- * spi_ofdata_to_platdata() - decode standard SPI platform data
+ * spi_slave_ofdata_to_platdata() - decode standard SPI platform data
*
- * This decodes the speed and mode from a device tree node and puts it into
- * the spi_slave structure.
+ * This decodes the speed and mode for a slave from a device tree node
*
* @blob: Device tree blob
* @node: Node offset to read from
- * @spi: Place to put the decoded information
+ * @plat: Place to put the decoded information
*/
-int spi_ofdata_to_platdata(const void *blob, int node, struct spi_slave *spi);
+int spi_slave_ofdata_to_platdata(const void *blob, int node,
+ struct dm_spi_slave_platdata *plat);
/**
* spi_cs_info() - Check information on a chip select
struct udevice *bus, struct udevice *slave,
struct udevice **emulp);
-/* Access the serial operations for a device */
+/* Access the operations for a SPI device */
#define spi_get_ops(dev) ((struct dm_spi_ops *)(dev)->driver->ops)
#define spi_emul_get_ops(dev) ((struct dm_spi_emul_ops *)(dev)->driver->ops)
#endif /* CONFIG_DM_SPI */
projects / karo-tx-uboot.git / blobdiff