diff options
| author | Jerry Huang <Chang-Ming.Huang@freescale.com> | 2009-10-22 16:42:11 +0800 |
|---|---|---|
| committer | Scott Sweeny <scott.sweeny@timesys.com> | 2010-09-29 17:32:29 -0400 |
| commit | 9e2ee7c62e1f7596ad01432063396664f7af0b75 (patch) | |
| tree | 91b0559b558df95138fabc0983d0c5f5ff057f83 /include/spi.h | |
| parent | 63b85137a85f1c11fe2763caf479f2b56c4afffa (diff) | |
eSPI and eSPI controller support
This patch is from MPC8536, and fixed some hunk failed error.
Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com>
Singed-off-by: Jerry Huang <Chang-Ming.Huang@freescale.com>
Diffstat (limited to 'include/spi.h')
| -rw-r--r-- | include/spi.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/spi.h b/include/spi.h index 320e50e529..01c9bb4a39 100644 --- a/include/spi.h +++ b/include/spi.h @@ -2,6 +2,8 @@ * (C) Copyright 2001 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com. * + * Copyright(c) 2009 Freescale Semiconductor, Inc + * * See file CREDITS for list of people who contributed to this * project. * @@ -50,16 +52,38 @@ #define SPI_XFER_END 0x02 /* Deassert CS after transfer */ /*----------------------------------------------------------------------- + * Representation of a eSPI transaction, which is always embeded in + * structure spi_slave. + * + * cmd_len: Length of the command. + * data_len: Length of the transmit/receive data. + * tx_buf: Buffer to store the transmit command and data. + * rx_buf: Buffer to store the receive data. + * flags: Flags to indicate the begin/end of the transfer. + */ +struct espi_transfer { + unsigned int cmd_len; + unsigned int data_len; + const void *tx_buf; + void *rx_buf; + + unsigned long flags; +}; + +/*----------------------------------------------------------------------- * Representation of a SPI slave, i.e. what we're communicating with. * * Drivers are expected to extend this with controller-specific data. * * bus: ID of the bus that the slave is attached to. * cs: ID of the chip select connected to the slave. + * transfer: Represent an eSPI transaction. */ struct spi_slave { unsigned int bus; unsigned int cs; + + struct espi_transfer *transfer; }; /*----------------------------------------------------------------------- @@ -148,6 +172,14 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout, void *din, unsigned long flags); /*----------------------------------------------------------------------- + * eSPI transfer + * + * Returns: 0 on success, not 0 on failure + */ +int espi_xfer(struct spi_slave *slave); + + +/*----------------------------------------------------------------------- * Determine if a SPI chipselect is valid. * This function is provided by the board if the low-level SPI driver * needs it to determine if a given chipselect is actually valid. |