diff options
Diffstat (limited to 'drivers/spi/mxc_spi.c')
| -rw-r--r-- | drivers/spi/mxc_spi.c | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/drivers/spi/mxc_spi.c b/drivers/spi/mxc_spi.c index c5ffad80fb6..c61ab74edcb 100644 --- a/drivers/spi/mxc_spi.c +++ b/drivers/spi/mxc_spi.c @@ -20,6 +20,82 @@ DECLARE_GLOBAL_DATA_PTR; +/* MX35 and older is CSPI */ +#if defined(CONFIG_MX25) || defined(CONFIG_MX31) || defined(CONFIG_MX35) +#define MXC_CSPI +struct cspi_regs { + u32 rxdata; + u32 txdata; + u32 ctrl; + u32 intr; + u32 dma; + u32 stat; + u32 period; + u32 test; +}; + +#define MXC_CSPICTRL_EN BIT(0) +#define MXC_CSPICTRL_MODE BIT(1) +#define MXC_CSPICTRL_XCH BIT(2) +#define MXC_CSPICTRL_SMC BIT(3) +#define MXC_CSPICTRL_POL BIT(4) +#define MXC_CSPICTRL_PHA BIT(5) +#define MXC_CSPICTRL_SSCTL BIT(6) +#define MXC_CSPICTRL_SSPOL BIT(7) +#define MXC_CSPICTRL_DATARATE(x) (((x) & 0x7) << 16) +#define MXC_CSPICTRL_RXOVF BIT(6) +#define MXC_CSPIPERIOD_32KHZ BIT(15) +#define MAX_SPI_BYTES 4 +#if defined(CONFIG_MX25) || defined(CONFIG_MX35) +#define MXC_CSPICTRL_CHIPSELECT(x) (((x) & 0x3) << 12) +#define MXC_CSPICTRL_BITCOUNT(x) (((x) & 0xfff) << 20) +#define MXC_CSPICTRL_TC BIT(7) +#define MXC_CSPICTRL_MAXBITS 0xfff +#else /* MX31 */ +#define MXC_CSPICTRL_CHIPSELECT(x) (((x) & 0x3) << 24) +#define MXC_CSPICTRL_BITCOUNT(x) (((x) & 0x1f) << 8) +#define MXC_CSPICTRL_TC BIT(8) +#define MXC_CSPICTRL_MAXBITS 0x1f +#endif + +#else /* MX51 and newer is ECSPI */ +#define MXC_ECSPI +struct cspi_regs { + u32 rxdata; + u32 txdata; + u32 ctrl; + u32 cfg; + u32 intr; + u32 dma; + u32 stat; + u32 period; +}; + +#define MXC_CSPICTRL_EN BIT(0) +#define MXC_CSPICTRL_MODE BIT(1) +#define MXC_CSPICTRL_XCH BIT(2) +#define MXC_CSPICTRL_MODE_MASK (0xf << 4) +#define MXC_CSPICTRL_CHIPSELECT(x) (((x) & 0x3) << 12) +#define MXC_CSPICTRL_BITCOUNT(x) (((x) & 0xfff) << 20) +#define MXC_CSPICTRL_PREDIV(x) (((x) & 0xF) << 12) +#define MXC_CSPICTRL_POSTDIV(x) (((x) & 0xF) << 8) +#define MXC_CSPICTRL_SELCHAN(x) (((x) & 0x3) << 18) +#define MXC_CSPICTRL_MAXBITS 0xfff +#define MXC_CSPICTRL_TC BIT(7) +#define MXC_CSPICTRL_RXOVF BIT(6) +#define MXC_CSPIPERIOD_32KHZ BIT(15) +#define MAX_SPI_BYTES 32 + +/* Bit position inside CTRL register to be associated with SS */ +#define MXC_CSPICTRL_CHAN 18 + +/* Bit position inside CON register to be associated with SS */ +#define MXC_CSPICON_PHA 0 /* SCLK phase control */ +#define MXC_CSPICON_POL 4 /* SCLK polarity */ +#define MXC_CSPICON_SSPOL 12 /* SS polarity */ +#define MXC_CSPICON_CTL 20 /* inactive state of SCLK */ +#endif + #ifdef CONFIG_MX27 /* i.MX27 has a completely wrong register layout and register definitions in the * datasheet, the correct one is in the Freescale's Linux driver */ |