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fsl_lbc.h

/* Freescale Local Bus Controller
 *
 * Copyright (c) 2006-2007 Freescale Semiconductor
 *
 * Authors: Nick Spence <nick.spence@freescale.com>,
 *          Scott Wood <scottwood@freescale.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef __ASM_FSL_LBC_H
#define __ASM_FSL_LBC_H

#include <linux/types.h>
#include <linux/spinlock.h>
#include <asm/io.h>

struct fsl_lbc_bank {
      __be32 br;             /**< Base Register  */
#define BR_BA           0xFFFF8000
#define BR_BA_SHIFT             15
#define BR_PS           0x00001800
#define BR_PS_SHIFT             11
#define BR_PS_8         0x00000800  /* Port Size 8 bit */
#define BR_PS_16        0x00001000  /* Port Size 16 bit */
#define BR_PS_32        0x00001800  /* Port Size 32 bit */
#define BR_DECC         0x00000600
#define BR_DECC_SHIFT            9
#define BR_DECC_OFF     0x00000000  /* HW ECC checking and generation off */
#define BR_DECC_CHK     0x00000200  /* HW ECC checking on, generation off */
#define BR_DECC_CHK_GEN 0x00000400  /* HW ECC checking and generation on */
#define BR_WP           0x00000100
#define BR_WP_SHIFT              8
#define BR_MSEL         0x000000E0
#define BR_MSEL_SHIFT            5
#define BR_MS_GPCM      0x00000000  /* GPCM */
#define BR_MS_FCM       0x00000020  /* FCM */
#define BR_MS_SDRAM     0x00000060  /* SDRAM */
#define BR_MS_UPMA      0x00000080  /* UPMA */
#define BR_MS_UPMB      0x000000A0  /* UPMB */
#define BR_MS_UPMC      0x000000C0  /* UPMC */
#define BR_V            0x00000001
#define BR_V_SHIFT               0
#define BR_RES          ~(BR_BA|BR_PS|BR_DECC|BR_WP|BR_MSEL|BR_V)

      __be32 or;             /**< Base Register  */
#define OR0 0x5004
#define OR1 0x500C
#define OR2 0x5014
#define OR3 0x501C
#define OR4 0x5024
#define OR5 0x502C
#define OR6 0x5034
#define OR7 0x503C

#define OR_FCM_AM               0xFFFF8000
#define OR_FCM_AM_SHIFT                 15
#define OR_FCM_BCTLD            0x00001000
#define OR_FCM_BCTLD_SHIFT              12
#define OR_FCM_PGS              0x00000400
#define OR_FCM_PGS_SHIFT                10
#define OR_FCM_CSCT             0x00000200
#define OR_FCM_CSCT_SHIFT                9
#define OR_FCM_CST              0x00000100
#define OR_FCM_CST_SHIFT                 8
#define OR_FCM_CHT              0x00000080
#define OR_FCM_CHT_SHIFT                 7
#define OR_FCM_SCY              0x00000070
#define OR_FCM_SCY_SHIFT                 4
#define OR_FCM_SCY_1            0x00000010
#define OR_FCM_SCY_2            0x00000020
#define OR_FCM_SCY_3            0x00000030
#define OR_FCM_SCY_4            0x00000040
#define OR_FCM_SCY_5            0x00000050
#define OR_FCM_SCY_6            0x00000060
#define OR_FCM_SCY_7            0x00000070
#define OR_FCM_RST              0x00000008
#define OR_FCM_RST_SHIFT                 3
#define OR_FCM_TRLX             0x00000004
#define OR_FCM_TRLX_SHIFT                2
#define OR_FCM_EHTR             0x00000002
#define OR_FCM_EHTR_SHIFT                1
};

struct fsl_lbc_regs {
      struct fsl_lbc_bank bank[8];
      u8 res0[0x28];
      __be32 mar;             /**< UPM Address Register */
      u8 res1[0x4];
      __be32 mamr;            /**< UPMA Mode Register */
#define MxMR_OP_NO      (0 << 28) /**< normal operation */
#define MxMR_OP_WA      (1 << 28) /**< write array */
#define MxMR_OP_RA      (2 << 28) /**< read array */
#define MxMR_OP_RP      (3 << 28) /**< run pattern */
#define MxMR_MAD  0x3f      /**< machine address */
      __be32 mbmr;            /**< UPMB Mode Register */
      __be32 mcmr;            /**< UPMC Mode Register */
      u8 res2[0x8];
      __be32 mrtpr;           /**< Memory Refresh Timer Prescaler Register */
      __be32 mdr;             /**< UPM Data Register */
      u8 res3[0x4];
      __be32 lsor;            /**< Special Operation Initiation Register */
      __be32 lsdmr;           /**< SDRAM Mode Register */
      u8 res4[0x8];
      __be32 lurt;            /**< UPM Refresh Timer */
      __be32 lsrt;            /**< SDRAM Refresh Timer */
      u8 res5[0x8];
      __be32 ltesr;           /**< Transfer Error Status Register */
#define LTESR_BM   0x80000000
#define LTESR_FCT  0x40000000
#define LTESR_PAR  0x20000000
#define LTESR_WP   0x04000000
#define LTESR_ATMW 0x00800000
#define LTESR_ATMR 0x00400000
#define LTESR_CS   0x00080000
#define LTESR_CC   0x00000001
#define LTESR_NAND_MASK (LTESR_FCT | LTESR_PAR | LTESR_CC)
      __be32 ltedr;           /**< Transfer Error Disable Register */
      __be32 lteir;           /**< Transfer Error Interrupt Register */
      __be32 lteatr;          /**< Transfer Error Attributes Register */
      __be32 ltear;           /**< Transfer Error Address Register */
      u8 res6[0xC];
      __be32 lbcr;            /**< Configuration Register */
#define LBCR_LDIS  0x80000000
#define LBCR_LDIS_SHIFT    31
#define LBCR_BCTLC 0x00C00000
#define LBCR_BCTLC_SHIFT   22
#define LBCR_AHD   0x00200000
#define LBCR_LPBSE 0x00020000
#define LBCR_LPBSE_SHIFT   17
#define LBCR_EPAR  0x00010000
#define LBCR_EPAR_SHIFT    16
#define LBCR_BMT   0x0000FF00
#define LBCR_BMT_SHIFT      8
#define LBCR_INIT  0x00040000
      __be32 lcrr;            /**< Clock Ratio Register */
#define LCRR_DBYP    0x80000000
#define LCRR_DBYP_SHIFT      31
#define LCRR_BUFCMDC 0x30000000
#define LCRR_BUFCMDC_SHIFT   28
#define LCRR_ECL     0x03000000
#define LCRR_ECL_SHIFT       24
#define LCRR_EADC    0x00030000
#define LCRR_EADC_SHIFT      16
#define LCRR_CLKDIV  0x0000000F
#define LCRR_CLKDIV_SHIFT     0
      u8 res7[0x8];
      __be32 fmr;             /**< Flash Mode Register */
#define FMR_CWTO     0x0000F000
#define FMR_CWTO_SHIFT       12
#define FMR_BOOT     0x00000800
#define FMR_ECCM     0x00000100
#define FMR_AL       0x00000030
#define FMR_AL_SHIFT          4
#define FMR_OP       0x00000003
#define FMR_OP_SHIFT          0
      __be32 fir;             /**< Flash Instruction Register */
#define FIR_OP0      0xF0000000
#define FIR_OP0_SHIFT        28
#define FIR_OP1      0x0F000000
#define FIR_OP1_SHIFT        24
#define FIR_OP2      0x00F00000
#define FIR_OP2_SHIFT        20
#define FIR_OP3      0x000F0000
#define FIR_OP3_SHIFT        16
#define FIR_OP4      0x0000F000
#define FIR_OP4_SHIFT        12
#define FIR_OP5      0x00000F00
#define FIR_OP5_SHIFT         8
#define FIR_OP6      0x000000F0
#define FIR_OP6_SHIFT         4
#define FIR_OP7      0x0000000F
#define FIR_OP7_SHIFT         0
#define FIR_OP_NOP   0x0      /* No operation and end of sequence */
#define FIR_OP_CA    0x1        /* Issue current column address */
#define FIR_OP_PA    0x2        /* Issue current block+page address */
#define FIR_OP_UA    0x3        /* Issue user defined address */
#define FIR_OP_CM0   0x4        /* Issue command from FCR[CMD0] */
#define FIR_OP_CM1   0x5        /* Issue command from FCR[CMD1] */
#define FIR_OP_CM2   0x6        /* Issue command from FCR[CMD2] */
#define FIR_OP_CM3   0x7        /* Issue command from FCR[CMD3] */
#define FIR_OP_WB    0x8        /* Write FBCR bytes from FCM buffer */
#define FIR_OP_WS    0x9        /* Write 1 or 2 bytes from MDR[AS] */
#define FIR_OP_RB    0xA        /* Read FBCR bytes to FCM buffer */
#define FIR_OP_RS    0xB        /* Read 1 or 2 bytes to MDR[AS] */
#define FIR_OP_CW0   0xC        /* Wait then issue FCR[CMD0] */
#define FIR_OP_CW1   0xD        /* Wait then issue FCR[CMD1] */
#define FIR_OP_RBW   0xE        /* Wait then read FBCR bytes */
#define FIR_OP_RSW   0xE        /* Wait then read 1 or 2 bytes */
      __be32 fcr;             /**< Flash Command Register */
#define FCR_CMD0     0xFF000000
#define FCR_CMD0_SHIFT       24
#define FCR_CMD1     0x00FF0000
#define FCR_CMD1_SHIFT       16
#define FCR_CMD2     0x0000FF00
#define FCR_CMD2_SHIFT        8
#define FCR_CMD3     0x000000FF
#define FCR_CMD3_SHIFT        0
      __be32 fbar;            /**< Flash Block Address Register */
#define FBAR_BLK     0x00FFFFFF
      __be32 fpar;            /**< Flash Page Address Register */
#define FPAR_SP_PI   0x00007C00
#define FPAR_SP_PI_SHIFT     10
#define FPAR_SP_MS   0x00000200
#define FPAR_SP_CI   0x000001FF
#define FPAR_SP_CI_SHIFT      0
#define FPAR_LP_PI   0x0003F000
#define FPAR_LP_PI_SHIFT     12
#define FPAR_LP_MS   0x00000800
#define FPAR_LP_CI   0x000007FF
#define FPAR_LP_CI_SHIFT      0
      __be32 fbcr;            /**< Flash Byte Count Register */
#define FBCR_BC      0x00000FFF
      u8 res11[0x8];
      u8 res8[0xF00];
};

extern struct fsl_lbc_regs __iomem *fsl_lbc_regs;
extern spinlock_t fsl_lbc_lock;

/*
 * FSL UPM routines
 */
struct fsl_upm {
      __be32 __iomem *mxmr;
      int width;
};

extern int fsl_lbc_find(phys_addr_t addr_base);
extern int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm);

/**
 * fsl_upm_start_pattern - start UPM patterns execution
 * @upm:    pointer to the fsl_upm structure obtained via fsl_upm_find
 * @pat_offset:   UPM pattern offset for the command to be executed
 *
 * This routine programmes UPM so the next memory access that hits an UPM
 * will trigger pattern execution, starting at pat_offset.
 */
static inline void fsl_upm_start_pattern(struct fsl_upm *upm, u8 pat_offset)
{
      clrsetbits_be32(upm->mxmr, MxMR_MAD, MxMR_OP_RP | pat_offset);
}

/**
 * fsl_upm_end_pattern - end UPM patterns execution
 * @upm:    pointer to the fsl_upm structure obtained via fsl_upm_find
 *
 * This routine reverts UPM to normal operation mode.
 */
static inline void fsl_upm_end_pattern(struct fsl_upm *upm)
{
      clrbits32(upm->mxmr, MxMR_OP_RP);

      while (in_be32(upm->mxmr) & MxMR_OP_RP)
            cpu_relax();
}

/**
 * fsl_upm_run_pattern - actually run an UPM pattern
 * @upm:    pointer to the fsl_upm structure obtained via fsl_upm_find
 * @io_base:      remapped pointer to where memory access should happen
 * @mar:    MAR register content during pattern execution
 *
 * This function triggers dummy write to the memory specified by the io_base,
 * thus UPM pattern actually executed. Note that mar usage depends on the
 * pre-programmed AMX bits in the UPM RAM.
 */
static inline int fsl_upm_run_pattern(struct fsl_upm *upm,
                              void __iomem *io_base, u32 mar)
{
      int ret = 0;
      unsigned long flags;

      spin_lock_irqsave(&fsl_lbc_lock, flags);

      out_be32(&fsl_lbc_regs->mar, mar << (32 - upm->width));

      switch (upm->width) {
      case 8:
            out_8(io_base, 0x0);
            break;
      case 16:
            out_be16(io_base, 0x0);
            break;
      case 32:
            out_be32(io_base, 0x0);
            break;
      default:
            ret = -EINVAL;
            break;
      }

      spin_unlock_irqrestore(&fsl_lbc_lock, flags);

      return ret;
}

#endif /* __ASM_FSL_LBC_H */

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