126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
/*
|
|
* bfin_crc.h - interface to Blackfin CRC controllers
|
|
*
|
|
* Copyright 2012 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef __BFIN_CRC_H__
|
|
#define __BFIN_CRC_H__
|
|
|
|
/* Function driver which use hardware crc must initialize the structure */
|
|
struct crc_info {
|
|
/* Input data address */
|
|
unsigned char *in_addr;
|
|
/* Output data address */
|
|
unsigned char *out_addr;
|
|
/* Input or output bytes */
|
|
unsigned long datasize;
|
|
union {
|
|
/* CRC to compare with that of input buffer */
|
|
unsigned long crc_compare;
|
|
/* Value to compare with input data */
|
|
unsigned long val_verify;
|
|
/* Value to fill */
|
|
unsigned long val_fill;
|
|
};
|
|
/* Value to program the 32b CRC Polynomial */
|
|
unsigned long crc_poly;
|
|
union {
|
|
/* CRC calculated from the input data */
|
|
unsigned long crc_result;
|
|
/* First failed position to verify input data */
|
|
unsigned long pos_verify;
|
|
};
|
|
/* CRC mirror flags */
|
|
unsigned int bitmirr:1;
|
|
unsigned int bytmirr:1;
|
|
unsigned int w16swp:1;
|
|
unsigned int fdsel:1;
|
|
unsigned int rsltmirr:1;
|
|
unsigned int polymirr:1;
|
|
unsigned int cmpmirr:1;
|
|
};
|
|
|
|
/* Userspace interface */
|
|
#define CRC_IOC_MAGIC 'C'
|
|
#define CRC_IOC_CALC_CRC _IOWR('C', 0x01, unsigned int)
|
|
#define CRC_IOC_MEMCPY_CRC _IOWR('C', 0x02, unsigned int)
|
|
#define CRC_IOC_VERIFY_VAL _IOWR('C', 0x03, unsigned int)
|
|
#define CRC_IOC_FILL_VAL _IOWR('C', 0x04, unsigned int)
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/miscdevice.h>
|
|
|
|
struct crc_register {
|
|
u32 control;
|
|
u32 datacnt;
|
|
u32 datacntrld;
|
|
u32 __pad_1[2];
|
|
u32 compare;
|
|
u32 fillval;
|
|
u32 datafifo;
|
|
u32 intren;
|
|
u32 intrenset;
|
|
u32 intrenclr;
|
|
u32 poly;
|
|
u32 __pad_2[4];
|
|
u32 status;
|
|
u32 datacntcap;
|
|
u32 __pad_3;
|
|
u32 result;
|
|
u32 curresult;
|
|
u32 __pad_4[3];
|
|
u32 revid;
|
|
};
|
|
|
|
/* CRC_STATUS Masks */
|
|
#define CMPERR 0x00000002 /* Compare error */
|
|
#define DCNTEXP 0x00000010 /* datacnt register expired */
|
|
#define IBR 0x00010000 /* Input buffer ready */
|
|
#define OBR 0x00020000 /* Output buffer ready */
|
|
#define IRR 0x00040000 /* Immediate result readt */
|
|
#define LUTDONE 0x00080000 /* Look-up table generation done */
|
|
#define FSTAT 0x00700000 /* FIFO status */
|
|
#define MAX_FIFO 4 /* Max fifo size */
|
|
|
|
/* CRC_CONTROL Masks */
|
|
#define BLKEN 0x00000001 /* Block enable */
|
|
#define OPMODE 0x000000F0 /* Operation mode */
|
|
#define OPMODE_OFFSET 4 /* Operation mode mask offset*/
|
|
#define MODE_DMACPY_CRC 1 /* MTM CRC compute and compare */
|
|
#define MODE_DATA_FILL 2 /* MTM data fill */
|
|
#define MODE_CALC_CRC 3 /* MSM CRC compute and compare */
|
|
#define MODE_DATA_VERIFY 4 /* MSM data verify */
|
|
#define AUTOCLRZ 0x00000100 /* Auto clear to zero */
|
|
#define AUTOCLRF 0x00000200 /* Auto clear to one */
|
|
#define OBRSTALL 0x00001000 /* Stall on output buffer ready */
|
|
#define IRRSTALL 0x00002000 /* Stall on immediate result ready */
|
|
#define BITMIRR 0x00010000 /* Mirror bits within each byte of 32-bit input data */
|
|
#define BITMIRR_OFFSET 16 /* Mirror bits offset */
|
|
#define BYTMIRR 0x00020000 /* Mirror bytes of 32-bit input data */
|
|
#define BYTMIRR_OFFSET 17 /* Mirror bytes offset */
|
|
#define W16SWP 0x00040000 /* Mirror uppper and lower 16-bit word of 32-bit input data */
|
|
#define W16SWP_OFFSET 18 /* Mirror 16-bit word offset */
|
|
#define FDSEL 0x00080000 /* FIFO is written after input data is mirrored */
|
|
#define FDSEL_OFFSET 19 /* Mirror FIFO offset */
|
|
#define RSLTMIRR 0x00100000 /* CRC result registers are mirrored. */
|
|
#define RSLTMIRR_OFFSET 20 /* Mirror CRC result offset. */
|
|
#define POLYMIRR 0x00200000 /* CRC poly register is mirrored. */
|
|
#define POLYMIRR_OFFSET 21 /* Mirror CRC poly offset. */
|
|
#define CMPMIRR 0x00400000 /* CRC compare register is mirrored. */
|
|
#define CMPMIRR_OFFSET 22 /* Mirror CRC compare offset. */
|
|
|
|
/* CRC_INTREN Masks */
|
|
#define CMPERRI 0x02 /* CRC_ERROR_INTR */
|
|
#define DCNTEXPI 0x10 /* CRC_STATUS_INTR */
|
|
|
|
#endif
|
|
|
|
#endif
|