u-boot/drivers/spi/davinci_spi.h
Karicheri, Muralidharan 2bcdf84d58 spi: davinci: add support for multiple bus and chip select
Currently davinci spi driver supports only bus 0 cs 0.
This patch allows driver to support bus 1 and bus 2 with
configurable number of chip selects. Also defaults are
selected in a way to avoid regression on other platforms
that uses davinci spi driver and has only one spi bus.

Signed-off-by: Rex Chang <rchang@ti.com>
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
2014-04-17 17:24:39 -04:00

121 lines
2.9 KiB
C

/*
* Copyright (C) 2009 Texas Instruments Incorporated - http://www.ti.com/
*
* Register definitions for the DaVinci SPI Controller
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _DAVINCI_SPI_H_
#define _DAVINCI_SPI_H_
struct davinci_spi_regs {
dv_reg gcr0; /* 0x00 */
dv_reg gcr1; /* 0x04 */
dv_reg int0; /* 0x08 */
dv_reg lvl; /* 0x0c */
dv_reg flg; /* 0x10 */
dv_reg pc0; /* 0x14 */
dv_reg pc1; /* 0x18 */
dv_reg pc2; /* 0x1c */
dv_reg pc3; /* 0x20 */
dv_reg pc4; /* 0x24 */
dv_reg pc5; /* 0x28 */
dv_reg rsvd[3];
dv_reg dat0; /* 0x38 */
dv_reg dat1; /* 0x3c */
dv_reg buf; /* 0x40 */
dv_reg emu; /* 0x44 */
dv_reg delay; /* 0x48 */
dv_reg def; /* 0x4c */
dv_reg fmt0; /* 0x50 */
dv_reg fmt1; /* 0x54 */
dv_reg fmt2; /* 0x58 */
dv_reg fmt3; /* 0x5c */
dv_reg intvec0; /* 0x60 */
dv_reg intvec1; /* 0x64 */
};
#define BIT(x) (1 << (x))
/* SPIGCR0 */
#define SPIGCR0_SPIENA_MASK 0x1
#define SPIGCR0_SPIRST_MASK 0x0
/* SPIGCR0 */
#define SPIGCR1_CLKMOD_MASK BIT(1)
#define SPIGCR1_MASTER_MASK BIT(0)
#define SPIGCR1_SPIENA_MASK BIT(24)
/* SPIPC0 */
#define SPIPC0_DIFUN_MASK BIT(11) /* SIMO */
#define SPIPC0_DOFUN_MASK BIT(10) /* SOMI */
#define SPIPC0_CLKFUN_MASK BIT(9) /* CLK */
#define SPIPC0_EN0FUN_MASK BIT(0)
/* SPIFMT0 */
#define SPIFMT_SHIFTDIR_SHIFT 20
#define SPIFMT_POLARITY_SHIFT 17
#define SPIFMT_PHASE_SHIFT 16
#define SPIFMT_PRESCALE_SHIFT 8
/* SPIDAT1 */
#define SPIDAT1_CSHOLD_SHIFT 28
#define SPIDAT1_CSNR_SHIFT 16
/* SPIDELAY */
#define SPI_C2TDELAY_SHIFT 24
#define SPI_T2CDELAY_SHIFT 16
/* SPIBUF */
#define SPIBUF_RXEMPTY_MASK BIT(31)
#define SPIBUF_TXFULL_MASK BIT(29)
/* SPIDEF */
#define SPIDEF_CSDEF0_MASK BIT(0)
#define SPI0_BUS 0
#define SPI0_BASE CONFIG_SYS_SPI_BASE
/*
* Define default SPI0_NUM_CS as 1 for existing platforms that uses this
* driver. Platform can configure number of CS using CONFIG_SYS_SPI0_NUM_CS
* if more than one CS is supported and by defining CONFIG_SYS_SPI0.
*/
#ifndef CONFIG_SYS_SPI0
#define SPI0_NUM_CS 1
#else
#define SPI0_NUM_CS CONFIG_SYS_SPI0_NUM_CS
#endif
/*
* define CONFIG_SYS_SPI1 when platform has spi-1 device (bus #1) and
* CONFIG_SYS_SPI1_NUM_CS defines number of CS on this bus
*/
#ifdef CONFIG_SYS_SPI1
#define SPI1_BUS 1
#define SPI1_NUM_CS CONFIG_SYS_SPI1_NUM_CS
#define SPI1_BASE CONFIG_SYS_SPI1_BASE
#endif
/*
* define CONFIG_SYS_SPI2 when platform has spi-2 device (bus #2) and
* CONFIG_SYS_SPI2_NUM_CS defines number of CS on this bus
*/
#ifdef CONFIG_SYS_SPI2
#define SPI2_BUS 2
#define SPI2_NUM_CS CONFIG_SYS_SPI2_NUM_CS
#define SPI2_BASE CONFIG_SYS_SPI2_BASE
#endif
struct davinci_spi_slave {
struct spi_slave slave;
struct davinci_spi_regs *regs;
unsigned int freq;
};
static inline struct davinci_spi_slave *to_davinci_spi(struct spi_slave *slave)
{
return container_of(slave, struct davinci_spi_slave, slave);
}
#endif /* _DAVINCI_SPI_H_ */