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