diff options
Diffstat (limited to 'drivers/spi/tegra20_sflash.c')
| -rw-r--r-- | drivers/spi/tegra20_sflash.c | 53 |
1 files changed, 49 insertions, 4 deletions
diff --git a/drivers/spi/tegra20_sflash.c b/drivers/spi/tegra20_sflash.c index 3b1b6f892..6e72c8ee5 100644 --- a/drivers/spi/tegra20_sflash.c +++ b/drivers/spi/tegra20_sflash.c @@ -35,9 +35,54 @@ DECLARE_GLOBAL_DATA_PTR; +#define SPI_CMD_GO (1 << 30) +#define SPI_CMD_ACTIVE_SCLK_SHIFT 26 +#define SPI_CMD_ACTIVE_SCLK_MASK (3 << SPI_CMD_ACTIVE_SCLK_SHIFT) +#define SPI_CMD_CK_SDA (1 << 21) +#define SPI_CMD_ACTIVE_SDA_SHIFT 18 +#define SPI_CMD_ACTIVE_SDA_MASK (3 << SPI_CMD_ACTIVE_SDA_SHIFT) +#define SPI_CMD_CS_POL (1 << 16) +#define SPI_CMD_TXEN (1 << 15) +#define SPI_CMD_RXEN (1 << 14) +#define SPI_CMD_CS_VAL (1 << 13) +#define SPI_CMD_CS_SOFT (1 << 12) +#define SPI_CMD_CS_DELAY (1 << 9) +#define SPI_CMD_CS3_EN (1 << 8) +#define SPI_CMD_CS2_EN (1 << 7) +#define SPI_CMD_CS1_EN (1 << 6) +#define SPI_CMD_CS0_EN (1 << 5) +#define SPI_CMD_BIT_LENGTH (1 << 4) +#define SPI_CMD_BIT_LENGTH_MASK 0x0000001F + +#define SPI_STAT_BSY (1 << 31) +#define SPI_STAT_RDY (1 << 30) +#define SPI_STAT_RXF_FLUSH (1 << 29) +#define SPI_STAT_TXF_FLUSH (1 << 28) +#define SPI_STAT_RXF_UNR (1 << 27) +#define SPI_STAT_TXF_OVF (1 << 26) +#define SPI_STAT_RXF_EMPTY (1 << 25) +#define SPI_STAT_RXF_FULL (1 << 24) +#define SPI_STAT_TXF_EMPTY (1 << 23) +#define SPI_STAT_TXF_FULL (1 << 22) +#define SPI_STAT_SEL_TXRX_N (1 << 16) +#define SPI_STAT_CUR_BLKCNT (1 << 15) + +#define SPI_TIMEOUT 1000 +#define TEGRA_SPI_MAX_FREQ 52000000 + +struct spi_regs { + u32 command; /* SPI_COMMAND_0 register */ + u32 status; /* SPI_STATUS_0 register */ + u32 rx_cmp; /* SPI_RX_CMP_0 register */ + u32 dma_ctl; /* SPI_DMA_CTL_0 register */ + u32 tx_fifo; /* SPI_TX_FIFO_0 register */ + u32 rsvd[3]; /* offsets 0x14 to 0x1F reserved */ + u32 rx_fifo; /* SPI_RX_FIFO_0 register */ +}; + struct tegra_spi_slave { struct spi_slave slave; - struct spi_tegra *regs; + struct spi_regs *regs; unsigned int freq; unsigned int mode; int periph_id; @@ -93,7 +138,7 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs, debug("%s: sflash is disabled\n", __func__); return NULL; } - spi->regs = (struct spi_tegra *)fdtdec_get_addr(gd->fdt_blob, + spi->regs = (struct spi_regs *)fdtdec_get_addr(gd->fdt_blob, node, "reg"); if ((fdt_addr_t)spi->regs == FDT_ADDR_T_NONE) { debug("%s: no sflash register found\n", __func__); @@ -136,7 +181,7 @@ void spi_init(void) int spi_claim_bus(struct spi_slave *slave) { struct tegra_spi_slave *spi = to_tegra_spi(slave); - struct spi_tegra *regs = spi->regs; + struct spi_regs *regs = spi->regs; u32 reg; /* Change SPI clock to correct frequency, PLLP_OUT0 source */ @@ -199,7 +244,7 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *data_out, void *data_in, unsigned long flags) { struct tegra_spi_slave *spi = to_tegra_spi(slave); - struct spi_tegra *regs = spi->regs; + struct spi_regs *regs = spi->regs; u32 reg, tmpdout, tmpdin = 0; const u8 *dout = data_out; u8 *din = data_in; |