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author | Jagan Teki <jagan@amarulasolutions.com> | 2020-05-27 20:33:33 +0300 |
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committer | Jagan Teki <jagan@amarulasolutions.com> | 2020-06-11 12:44:04 +0300 |
commit | beeb34ac0cc68bf92b25d4343dce27f19bc4275e (patch) | |
tree | deda3a50a85e01665b9efe412cdd7c86413c3e07 /drivers/spi/atmel_spi.c | |
parent | 0984500146485a404148b6f3d773453c7d3e1b1c (diff) | |
download | u-boot-beeb34ac0cc68bf92b25d4343dce27f19bc4275e.tar.xz |
spi: atmel: Drop atmel_spi.h
atmel_spi.h has register offsets, and atmel_spi_slave
structure, move it into .c file for better readability
and drop atmel_spi.h
Cc: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Diffstat (limited to 'drivers/spi/atmel_spi.c')
-rw-r--r-- | drivers/spi/atmel_spi.c | 88 |
1 files changed, 85 insertions, 3 deletions
diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c index b9f684d67e..b120664661 100644 --- a/drivers/spi/atmel_spi.c +++ b/drivers/spi/atmel_spi.c @@ -9,20 +9,102 @@ #include <spi.h> #include <malloc.h> #include <wait_bit.h> - #include <asm/io.h> - #include <asm/arch/clk.h> #include <asm/arch/hardware.h> #include <asm/arch/at91_spi.h> #if CONFIG_IS_ENABLED(DM_GPIO) #include <asm/gpio.h> #endif +#include <linux/bitops.h> -#include "atmel_spi.h" +/* + * Register definitions for the Atmel AT32/AT91 SPI Controller + */ +/* Register offsets */ +#define ATMEL_SPI_CR 0x0000 +#define ATMEL_SPI_MR 0x0004 +#define ATMEL_SPI_RDR 0x0008 +#define ATMEL_SPI_TDR 0x000c +#define ATMEL_SPI_SR 0x0010 +#define ATMEL_SPI_IER 0x0014 +#define ATMEL_SPI_IDR 0x0018 +#define ATMEL_SPI_IMR 0x001c +#define ATMEL_SPI_CSR(x) (0x0030 + 4 * (x)) +#define ATMEL_SPI_VERSION 0x00fc + +/* Bits in CR */ +#define ATMEL_SPI_CR_SPIEN BIT(0) +#define ATMEL_SPI_CR_SPIDIS BIT(1) +#define ATMEL_SPI_CR_SWRST BIT(7) +#define ATMEL_SPI_CR_LASTXFER BIT(24) + +/* Bits in MR */ +#define ATMEL_SPI_MR_MSTR BIT(0) +#define ATMEL_SPI_MR_PS BIT(1) +#define ATMEL_SPI_MR_PCSDEC BIT(2) +#define ATMEL_SPI_MR_FDIV BIT(3) +#define ATMEL_SPI_MR_MODFDIS BIT(4) +#define ATMEL_SPI_MR_WDRBT BIT(5) +#define ATMEL_SPI_MR_LLB BIT(7) +#define ATMEL_SPI_MR_PCS(x) (((x) & 15) << 16) +#define ATMEL_SPI_MR_DLYBCS(x) ((x) << 24) + +/* Bits in RDR */ +#define ATMEL_SPI_RDR_RD(x) (x) +#define ATMEL_SPI_RDR_PCS(x) ((x) << 16) + +/* Bits in TDR */ +#define ATMEL_SPI_TDR_TD(x) (x) +#define ATMEL_SPI_TDR_PCS(x) ((x) << 16) +#define ATMEL_SPI_TDR_LASTXFER BIT(24) + +/* Bits in SR/IER/IDR/IMR */ +#define ATMEL_SPI_SR_RDRF BIT(0) +#define ATMEL_SPI_SR_TDRE BIT(1) +#define ATMEL_SPI_SR_MODF BIT(2) +#define ATMEL_SPI_SR_OVRES BIT(3) +#define ATMEL_SPI_SR_ENDRX BIT(4) +#define ATMEL_SPI_SR_ENDTX BIT(5) +#define ATMEL_SPI_SR_RXBUFF BIT(6) +#define ATMEL_SPI_SR_TXBUFE BIT(7) +#define ATMEL_SPI_SR_NSSR BIT(8) +#define ATMEL_SPI_SR_TXEMPTY BIT(9) +#define ATMEL_SPI_SR_SPIENS BIT(16) + +/* Bits in CSRx */ +#define ATMEL_SPI_CSRx_CPOL BIT(0) +#define ATMEL_SPI_CSRx_NCPHA BIT(1) +#define ATMEL_SPI_CSRx_CSAAT BIT(3) +#define ATMEL_SPI_CSRx_BITS(x) ((x) << 4) +#define ATMEL_SPI_CSRx_SCBR(x) ((x) << 8) +#define ATMEL_SPI_CSRx_SCBR_MAX GENMASK(7, 0) +#define ATMEL_SPI_CSRx_DLYBS(x) ((x) << 16) +#define ATMEL_SPI_CSRx_DLYBCT(x) ((x) << 24) + +/* Bits in VERSION */ +#define ATMEL_SPI_VERSION_REV(x) ((x) & 0xfff) +#define ATMEL_SPI_VERSION_MFN(x) ((x) << 16) + +/* Constants for CSRx:BITS */ +#define ATMEL_SPI_BITS_8 0 +#define ATMEL_SPI_BITS_9 1 +#define ATMEL_SPI_BITS_10 2 +#define ATMEL_SPI_BITS_11 3 +#define ATMEL_SPI_BITS_12 4 +#define ATMEL_SPI_BITS_13 5 +#define ATMEL_SPI_BITS_14 6 +#define ATMEL_SPI_BITS_15 7 +#define ATMEL_SPI_BITS_16 8 #define MAX_CS_COUNT 4 +/* Register access macros */ +#define spi_readl(as, reg) \ + readl(as->regs + ATMEL_SPI_##reg) +#define spi_writel(as, reg, value) \ + writel(value, as->regs + ATMEL_SPI_##reg) + struct atmel_spi_platdata { struct at91_spi *regs; }; |