blackfin: bf60x: add head file for crc controller

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>

diff --git a/arch/blackfin/include/asm/bfin_crc.h b/arch/blackfin/include/asm/bfin_crc.h
new file mode 100644 (file)
index 0000000..3deb445
--- /dev/null
+++ b/arch/blackfin/include/asm/bfin_crc.h
@@ -0,0 +1,139 @@
+/*
+ * 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