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/*
* 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;
};
struct bfin_crc {
struct miscdevice mdev;
struct list_head list;
int irq;
int dma_ch_src;
int dma_ch_dest;
volatile struct crc_register *regs;
struct crc_info *info;
struct mutex mutex;
struct completion c;
unsigned short opmode;
char name[20];
};
/* 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
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