diff options
Diffstat (limited to 'src/soc/nvidia/tegra124/spi.h')
| -rw-r--r-- | src/soc/nvidia/tegra124/spi.h | 44 |
1 files changed, 43 insertions, 1 deletions
diff --git a/src/soc/nvidia/tegra124/spi.h b/src/soc/nvidia/tegra124/spi.h index 02495ab6cd..dfe9be25bd 100644 --- a/src/soc/nvidia/tegra124/spi.h +++ b/src/soc/nvidia/tegra124/spi.h @@ -17,13 +17,55 @@ #ifndef __NVIDIA_TEGRA124_SPI_H__ #define __NVIDIA_TEGRA124_SPI_H__ +#include <spi-generic.h> #include <stddef.h> +#include "dma.h" + +struct tegra_spi_regs { + u32 command1; /* 0x000: SPI_COMMAND1 */ + u32 command2; /* 0x004: SPI_COMMAND2 */ + u32 timing1; /* 0x008: SPI_CS_TIM1 */ + u32 timing2; /* 0x00c: SPI_CS_TIM2 */ + u32 trans_status; /* 0x010: SPI_TRANS_STATUS */ + u32 fifo_status; /* 0x014: SPI_FIFO_STATUS */ + u32 tx_data; /* 0x018: SPI_TX_DATA */ + u32 rx_data; /* 0x01c: SPI_RX_DATA */ + u32 dma_ctl; /* 0x020: SPI_DMA_CTL */ + u32 dma_blk; /* 0x024: SPI_DMA_BLK */ + u32 rsvd[56]; /* 0x028-0x107: reserved */ + u32 tx_fifo; /* 0x108: SPI_FIFO1 */ + u32 rsvd2[31]; /* 0x10c-0x187 reserved */ + u32 rx_fifo; /* 0x188: SPI_FIFO2 */ + u32 spare_ctl; /* 0x18c: SPI_SPARE_CTRL */ +} __attribute__((packed)); + +enum spi_xfer_mode { + XFER_MODE_NONE = 0, + XFER_MODE_PIO, + XFER_MODE_DMA, +}; + +struct tegra_spi_channel { + struct spi_slave slave; + struct tegra_spi_regs *regs; + + /* stuff that is specific to the attached device */ + int rx_frame_header_enable; + u8 frame_header; + + /* context (used internally) */ + u8 *in_buf, *out_buf; + struct apb_dma_channel *dma_out, *dma_in; + enum spi_xfer_mode xfer_mode; + +}; + struct cbfs_media; int initialize_tegra_spi_cbfs_media(struct cbfs_media *media, void *buffer_address, size_t buffer_size); -void tegra_spi_init(unsigned int bus); +struct tegra_spi_channel *tegra_spi_init(unsigned int bus); #endif /* __NVIDIA_TEGRA124_SPI_H__ */ |