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acaa7aa30a
Freescale UPM can be used to adjust localbus timings or to generate orbitrary, pre-programmed "patterns" on the external Localbus signals. This patch implements few routines so drivers could work with UPMs in safe and generic manner. So far there is just one user of these routines: Freescale UPM NAND driver. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
312 lines
11 KiB
C
312 lines
11 KiB
C
/* Freescale Local Bus Controller
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*
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* Copyright (c) 2006-2007 Freescale Semiconductor
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*
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* Authors: Nick Spence <nick.spence@freescale.com>,
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* Scott Wood <scottwood@freescale.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __ASM_FSL_LBC_H
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#define __ASM_FSL_LBC_H
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#include <linux/types.h>
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#include <linux/spinlock.h>
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#include <asm/io.h>
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struct fsl_lbc_bank {
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__be32 br; /**< Base Register */
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#define BR_BA 0xFFFF8000
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#define BR_BA_SHIFT 15
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#define BR_PS 0x00001800
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#define BR_PS_SHIFT 11
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#define BR_PS_8 0x00000800 /* Port Size 8 bit */
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#define BR_PS_16 0x00001000 /* Port Size 16 bit */
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#define BR_PS_32 0x00001800 /* Port Size 32 bit */
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#define BR_DECC 0x00000600
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#define BR_DECC_SHIFT 9
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#define BR_DECC_OFF 0x00000000 /* HW ECC checking and generation off */
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#define BR_DECC_CHK 0x00000200 /* HW ECC checking on, generation off */
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#define BR_DECC_CHK_GEN 0x00000400 /* HW ECC checking and generation on */
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#define BR_WP 0x00000100
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#define BR_WP_SHIFT 8
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#define BR_MSEL 0x000000E0
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#define BR_MSEL_SHIFT 5
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#define BR_MS_GPCM 0x00000000 /* GPCM */
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#define BR_MS_FCM 0x00000020 /* FCM */
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#define BR_MS_SDRAM 0x00000060 /* SDRAM */
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#define BR_MS_UPMA 0x00000080 /* UPMA */
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#define BR_MS_UPMB 0x000000A0 /* UPMB */
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#define BR_MS_UPMC 0x000000C0 /* UPMC */
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#define BR_V 0x00000001
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#define BR_V_SHIFT 0
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#define BR_RES ~(BR_BA|BR_PS|BR_DECC|BR_WP|BR_MSEL|BR_V)
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__be32 or; /**< Base Register */
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#define OR0 0x5004
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#define OR1 0x500C
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#define OR2 0x5014
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#define OR3 0x501C
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#define OR4 0x5024
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#define OR5 0x502C
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#define OR6 0x5034
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#define OR7 0x503C
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#define OR_FCM_AM 0xFFFF8000
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#define OR_FCM_AM_SHIFT 15
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#define OR_FCM_BCTLD 0x00001000
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#define OR_FCM_BCTLD_SHIFT 12
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#define OR_FCM_PGS 0x00000400
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#define OR_FCM_PGS_SHIFT 10
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#define OR_FCM_CSCT 0x00000200
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#define OR_FCM_CSCT_SHIFT 9
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#define OR_FCM_CST 0x00000100
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#define OR_FCM_CST_SHIFT 8
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#define OR_FCM_CHT 0x00000080
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#define OR_FCM_CHT_SHIFT 7
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#define OR_FCM_SCY 0x00000070
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#define OR_FCM_SCY_SHIFT 4
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#define OR_FCM_SCY_1 0x00000010
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#define OR_FCM_SCY_2 0x00000020
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#define OR_FCM_SCY_3 0x00000030
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#define OR_FCM_SCY_4 0x00000040
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#define OR_FCM_SCY_5 0x00000050
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#define OR_FCM_SCY_6 0x00000060
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#define OR_FCM_SCY_7 0x00000070
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#define OR_FCM_RST 0x00000008
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#define OR_FCM_RST_SHIFT 3
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#define OR_FCM_TRLX 0x00000004
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#define OR_FCM_TRLX_SHIFT 2
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#define OR_FCM_EHTR 0x00000002
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#define OR_FCM_EHTR_SHIFT 1
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};
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struct fsl_lbc_regs {
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struct fsl_lbc_bank bank[8];
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u8 res0[0x28];
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__be32 mar; /**< UPM Address Register */
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u8 res1[0x4];
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__be32 mamr; /**< UPMA Mode Register */
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#define MxMR_OP_NO (0 << 28) /**< normal operation */
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#define MxMR_OP_WA (1 << 28) /**< write array */
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#define MxMR_OP_RA (2 << 28) /**< read array */
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#define MxMR_OP_RP (3 << 28) /**< run pattern */
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#define MxMR_MAD 0x3f /**< machine address */
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__be32 mbmr; /**< UPMB Mode Register */
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__be32 mcmr; /**< UPMC Mode Register */
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u8 res2[0x8];
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__be32 mrtpr; /**< Memory Refresh Timer Prescaler Register */
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__be32 mdr; /**< UPM Data Register */
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u8 res3[0x4];
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__be32 lsor; /**< Special Operation Initiation Register */
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__be32 lsdmr; /**< SDRAM Mode Register */
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u8 res4[0x8];
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__be32 lurt; /**< UPM Refresh Timer */
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__be32 lsrt; /**< SDRAM Refresh Timer */
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u8 res5[0x8];
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__be32 ltesr; /**< Transfer Error Status Register */
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#define LTESR_BM 0x80000000
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#define LTESR_FCT 0x40000000
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#define LTESR_PAR 0x20000000
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#define LTESR_WP 0x04000000
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#define LTESR_ATMW 0x00800000
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#define LTESR_ATMR 0x00400000
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#define LTESR_CS 0x00080000
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#define LTESR_CC 0x00000001
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#define LTESR_NAND_MASK (LTESR_FCT | LTESR_PAR | LTESR_CC)
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__be32 ltedr; /**< Transfer Error Disable Register */
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__be32 lteir; /**< Transfer Error Interrupt Register */
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__be32 lteatr; /**< Transfer Error Attributes Register */
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__be32 ltear; /**< Transfer Error Address Register */
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u8 res6[0xC];
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__be32 lbcr; /**< Configuration Register */
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#define LBCR_LDIS 0x80000000
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#define LBCR_LDIS_SHIFT 31
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#define LBCR_BCTLC 0x00C00000
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#define LBCR_BCTLC_SHIFT 22
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#define LBCR_AHD 0x00200000
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#define LBCR_LPBSE 0x00020000
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#define LBCR_LPBSE_SHIFT 17
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#define LBCR_EPAR 0x00010000
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#define LBCR_EPAR_SHIFT 16
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#define LBCR_BMT 0x0000FF00
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#define LBCR_BMT_SHIFT 8
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#define LBCR_INIT 0x00040000
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__be32 lcrr; /**< Clock Ratio Register */
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#define LCRR_DBYP 0x80000000
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#define LCRR_DBYP_SHIFT 31
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#define LCRR_BUFCMDC 0x30000000
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#define LCRR_BUFCMDC_SHIFT 28
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#define LCRR_ECL 0x03000000
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#define LCRR_ECL_SHIFT 24
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#define LCRR_EADC 0x00030000
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#define LCRR_EADC_SHIFT 16
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#define LCRR_CLKDIV 0x0000000F
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#define LCRR_CLKDIV_SHIFT 0
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u8 res7[0x8];
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__be32 fmr; /**< Flash Mode Register */
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#define FMR_CWTO 0x0000F000
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#define FMR_CWTO_SHIFT 12
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#define FMR_BOOT 0x00000800
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#define FMR_ECCM 0x00000100
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#define FMR_AL 0x00000030
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#define FMR_AL_SHIFT 4
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#define FMR_OP 0x00000003
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#define FMR_OP_SHIFT 0
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__be32 fir; /**< Flash Instruction Register */
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#define FIR_OP0 0xF0000000
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#define FIR_OP0_SHIFT 28
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#define FIR_OP1 0x0F000000
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#define FIR_OP1_SHIFT 24
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#define FIR_OP2 0x00F00000
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#define FIR_OP2_SHIFT 20
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#define FIR_OP3 0x000F0000
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#define FIR_OP3_SHIFT 16
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#define FIR_OP4 0x0000F000
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#define FIR_OP4_SHIFT 12
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#define FIR_OP5 0x00000F00
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#define FIR_OP5_SHIFT 8
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#define FIR_OP6 0x000000F0
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#define FIR_OP6_SHIFT 4
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#define FIR_OP7 0x0000000F
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#define FIR_OP7_SHIFT 0
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#define FIR_OP_NOP 0x0 /* No operation and end of sequence */
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#define FIR_OP_CA 0x1 /* Issue current column address */
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#define FIR_OP_PA 0x2 /* Issue current block+page address */
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#define FIR_OP_UA 0x3 /* Issue user defined address */
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#define FIR_OP_CM0 0x4 /* Issue command from FCR[CMD0] */
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#define FIR_OP_CM1 0x5 /* Issue command from FCR[CMD1] */
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#define FIR_OP_CM2 0x6 /* Issue command from FCR[CMD2] */
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#define FIR_OP_CM3 0x7 /* Issue command from FCR[CMD3] */
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#define FIR_OP_WB 0x8 /* Write FBCR bytes from FCM buffer */
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#define FIR_OP_WS 0x9 /* Write 1 or 2 bytes from MDR[AS] */
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#define FIR_OP_RB 0xA /* Read FBCR bytes to FCM buffer */
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#define FIR_OP_RS 0xB /* Read 1 or 2 bytes to MDR[AS] */
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#define FIR_OP_CW0 0xC /* Wait then issue FCR[CMD0] */
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#define FIR_OP_CW1 0xD /* Wait then issue FCR[CMD1] */
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#define FIR_OP_RBW 0xE /* Wait then read FBCR bytes */
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#define FIR_OP_RSW 0xE /* Wait then read 1 or 2 bytes */
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__be32 fcr; /**< Flash Command Register */
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#define FCR_CMD0 0xFF000000
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#define FCR_CMD0_SHIFT 24
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#define FCR_CMD1 0x00FF0000
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#define FCR_CMD1_SHIFT 16
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#define FCR_CMD2 0x0000FF00
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#define FCR_CMD2_SHIFT 8
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#define FCR_CMD3 0x000000FF
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#define FCR_CMD3_SHIFT 0
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__be32 fbar; /**< Flash Block Address Register */
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#define FBAR_BLK 0x00FFFFFF
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__be32 fpar; /**< Flash Page Address Register */
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#define FPAR_SP_PI 0x00007C00
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#define FPAR_SP_PI_SHIFT 10
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#define FPAR_SP_MS 0x00000200
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#define FPAR_SP_CI 0x000001FF
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#define FPAR_SP_CI_SHIFT 0
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#define FPAR_LP_PI 0x0003F000
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#define FPAR_LP_PI_SHIFT 12
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#define FPAR_LP_MS 0x00000800
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#define FPAR_LP_CI 0x000007FF
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#define FPAR_LP_CI_SHIFT 0
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__be32 fbcr; /**< Flash Byte Count Register */
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#define FBCR_BC 0x00000FFF
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u8 res11[0x8];
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u8 res8[0xF00];
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};
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extern struct fsl_lbc_regs __iomem *fsl_lbc_regs;
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extern spinlock_t fsl_lbc_lock;
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/*
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* FSL UPM routines
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*/
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struct fsl_upm {
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__be32 __iomem *mxmr;
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int width;
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};
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extern int fsl_lbc_find(phys_addr_t addr_base);
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extern int fsl_upm_find(phys_addr_t addr_base, struct fsl_upm *upm);
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/**
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* fsl_upm_start_pattern - start UPM patterns execution
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* @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
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* @pat_offset: UPM pattern offset for the command to be executed
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*
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* This routine programmes UPM so the next memory access that hits an UPM
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* will trigger pattern execution, starting at pat_offset.
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*/
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static inline void fsl_upm_start_pattern(struct fsl_upm *upm, u8 pat_offset)
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{
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clrsetbits_be32(upm->mxmr, MxMR_MAD, MxMR_OP_RP | pat_offset);
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}
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/**
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* fsl_upm_end_pattern - end UPM patterns execution
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* @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
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*
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* This routine reverts UPM to normal operation mode.
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*/
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static inline void fsl_upm_end_pattern(struct fsl_upm *upm)
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{
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clrbits32(upm->mxmr, MxMR_OP_RP);
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while (in_be32(upm->mxmr) & MxMR_OP_RP)
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cpu_relax();
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}
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/**
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* fsl_upm_run_pattern - actually run an UPM pattern
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* @upm: pointer to the fsl_upm structure obtained via fsl_upm_find
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* @io_base: remapped pointer to where memory access should happen
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* @mar: MAR register content during pattern execution
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*
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* This function triggers dummy write to the memory specified by the io_base,
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* thus UPM pattern actually executed. Note that mar usage depends on the
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* pre-programmed AMX bits in the UPM RAM.
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*/
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static inline int fsl_upm_run_pattern(struct fsl_upm *upm,
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void __iomem *io_base, u32 mar)
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{
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int ret = 0;
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unsigned long flags;
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spin_lock_irqsave(&fsl_lbc_lock, flags);
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out_be32(&fsl_lbc_regs->mar, mar << (32 - upm->width));
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switch (upm->width) {
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case 8:
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out_8(io_base, 0x0);
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break;
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case 16:
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out_be16(io_base, 0x0);
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break;
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case 32:
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out_be32(io_base, 0x0);
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break;
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default:
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ret = -EINVAL;
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break;
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}
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spin_unlock_irqrestore(&fsl_lbc_lock, flags);
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return ret;
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}
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#endif /* __ASM_FSL_LBC_H */
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