LXR linux/arch/arm/plat-omap/include/plat/gpmc.h

   1/*
   2 * General-Purpose Memory Controller for OMAP2
   3 *
   4 * Copyright (C) 2005-2006 Nokia Corporation
   5 *
   6 * This program is free software; you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License version 2 as
   8 * published by the Free Software Foundation.
   9 */
  10
  11#ifndef __OMAP2_GPMC_H
  12#define __OMAP2_GPMC_H
  13
  14/* Maximum Number of Chip Selects */
  15#define GPMC_CS_NUM             8
  16
  17#define GPMC_CS_CONFIG1         0x00
  18#define GPMC_CS_CONFIG2         0x04
  19#define GPMC_CS_CONFIG3         0x08
  20#define GPMC_CS_CONFIG4         0x0c
  21#define GPMC_CS_CONFIG5         0x10
  22#define GPMC_CS_CONFIG6         0x14
  23#define GPMC_CS_CONFIG7         0x18
  24#define GPMC_CS_NAND_COMMAND    0x1c
  25#define GPMC_CS_NAND_ADDRESS    0x20
  26#define GPMC_CS_NAND_DATA       0x24
  27
  28/* Control Commands */
  29#define GPMC_CONFIG_RDY_BSY     0x00000001
  30#define GPMC_CONFIG_DEV_SIZE    0x00000002
  31#define GPMC_CONFIG_DEV_TYPE    0x00000003
  32#define GPMC_SET_IRQ_STATUS     0x00000004
  33#define GPMC_CONFIG_WP          0x00000005
  34
  35#define GPMC_GET_IRQ_STATUS     0x00000006
  36#define GPMC_PREFETCH_FIFO_CNT  0x00000007 /* bytes available in FIFO for r/w */
  37#define GPMC_PREFETCH_COUNT     0x00000008 /* remaining bytes to be read/write*/
  38#define GPMC_STATUS_BUFFER      0x00000009 /* 1: buffer is available to write */
  39
  40#define GPMC_NAND_COMMAND       0x0000000a
  41#define GPMC_NAND_ADDRESS       0x0000000b
  42#define GPMC_NAND_DATA          0x0000000c
  43
  44#define GPMC_ENABLE_IRQ         0x0000000d
  45
  46/* ECC commands */
  47#define GPMC_ECC_READ           0 /* Reset Hardware ECC for read */
  48#define GPMC_ECC_WRITE          1 /* Reset Hardware ECC for write */
  49#define GPMC_ECC_READSYN        2 /* Reset before syndrom is read back */
  50
  51#define GPMC_CONFIG1_WRAPBURST_SUPP     (1 << 31)
  52#define GPMC_CONFIG1_READMULTIPLE_SUPP  (1 << 30)
  53#define GPMC_CONFIG1_READTYPE_ASYNC     (0 << 29)
  54#define GPMC_CONFIG1_READTYPE_SYNC      (1 << 29)
  55#define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)
  56#define GPMC_CONFIG1_WRITETYPE_ASYNC    (0 << 27)
  57#define GPMC_CONFIG1_WRITETYPE_SYNC     (1 << 27)
  58#define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
  59#define GPMC_CONFIG1_PAGE_LEN(val)      ((val & 3) << 23)
  60#define GPMC_CONFIG1_WAIT_READ_MON      (1 << 22)
  61#define GPMC_CONFIG1_WAIT_WRITE_MON     (1 << 21)
  62#define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
  63#define GPMC_CONFIG1_WAIT_PIN_SEL(val)  ((val & 3) << 16)
  64#define GPMC_CONFIG1_DEVICESIZE(val)    ((val & 3) << 12)
  65#define GPMC_CONFIG1_DEVICESIZE_16      GPMC_CONFIG1_DEVICESIZE(1)
  66#define GPMC_CONFIG1_DEVICETYPE(val)    ((val & 3) << 10)
  67#define GPMC_CONFIG1_DEVICETYPE_NOR     GPMC_CONFIG1_DEVICETYPE(0)
  68#define GPMC_CONFIG1_MUXADDDATA         (1 << 9)
  69#define GPMC_CONFIG1_TIME_PARA_GRAN     (1 << 4)
  70#define GPMC_CONFIG1_FCLK_DIV(val)      (val & 3)
  71#define GPMC_CONFIG1_FCLK_DIV2          (GPMC_CONFIG1_FCLK_DIV(1))
  72#define GPMC_CONFIG1_FCLK_DIV3          (GPMC_CONFIG1_FCLK_DIV(2))
  73#define GPMC_CONFIG1_FCLK_DIV4          (GPMC_CONFIG1_FCLK_DIV(3))
  74#define GPMC_CONFIG7_CSVALID            (1 << 6)
  75
  76#define GPMC_DEVICETYPE_NOR             0
  77#define GPMC_DEVICETYPE_NAND            2
  78#define GPMC_CONFIG_WRITEPROTECT        0x00000010
  79#define GPMC_STATUS_BUFF_EMPTY          0x00000001
  80#define WR_RD_PIN_MONITORING            0x00600000
  81#define GPMC_PREFETCH_STATUS_FIFO_CNT(val)      ((val >> 24) & 0x7F)
  82#define GPMC_PREFETCH_STATUS_COUNT(val) (val & 0x00003fff)
  83#define GPMC_IRQ_FIFOEVENTENABLE        0x01
  84#define GPMC_IRQ_COUNT_EVENT            0x02
  85
  86#define PREFETCH_FIFOTHRESHOLD_MAX      0x40
  87#define PREFETCH_FIFOTHRESHOLD(val)     ((val) << 8)
  88
  89enum omap_ecc {
  90                /* 1-bit ecc: stored at end of spare area */
  91        OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */
  92        OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */
  93                /* 1-bit ecc: stored at beginning of spare area as romcode */
  94        OMAP_ECC_HAMMING_CODE_HW_ROMCODE, /* gpmc method & romcode layout */
  95};
  96
  97/*
  98 * Note that all values in this struct are in nanoseconds except sync_clk
  99 * (which is in picoseconds), while the register values are in gpmc_fck cycles.
 100 */
 101struct gpmc_timings {
 102        /* Minimum clock period for synchronous mode (in picoseconds) */
 103        u32 sync_clk;
 104
 105        /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
 106        u16 cs_on;              /* Assertion time */
 107        u16 cs_rd_off;          /* Read deassertion time */
 108        u16 cs_wr_off;          /* Write deassertion time */
 109
 110        /* ADV signal timings corresponding to GPMC_CONFIG3 */
 111        u16 adv_on;             /* Assertion time */
 112        u16 adv_rd_off;         /* Read deassertion time */
 113        u16 adv_wr_off;         /* Write deassertion time */
 114
 115        /* WE signals timings corresponding to GPMC_CONFIG4 */
 116        u16 we_on;              /* WE assertion time */
 117        u16 we_off;             /* WE deassertion time */
 118
 119        /* OE signals timings corresponding to GPMC_CONFIG4 */
 120        u16 oe_on;              /* OE assertion time */
 121        u16 oe_off;             /* OE deassertion time */
 122
 123        /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
 124        u16 page_burst_access;  /* Multiple access word delay */
 125        u16 access;             /* Start-cycle to first data valid delay */
 126        u16 rd_cycle;           /* Total read cycle time */
 127        u16 wr_cycle;           /* Total write cycle time */
 128
 129        /* The following are only on OMAP3430 */
 130        u16 wr_access;          /* WRACCESSTIME */
 131        u16 wr_data_mux_bus;    /* WRDATAONADMUXBUS */
 132};
 133
 134extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
 135extern unsigned int gpmc_ps_to_ticks(unsigned int time_ps);
 136extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
 137extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
 138extern unsigned long gpmc_get_fclk_period(void);
 139
 140extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
 141extern u32 gpmc_cs_read_reg(int cs, int idx);
 142extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
 143extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
 144extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
 145extern void gpmc_cs_free(int cs);
 146extern int gpmc_cs_set_reserved(int cs, int reserved);
 147extern int gpmc_cs_reserved(int cs);
 148extern int gpmc_prefetch_enable(int cs, int fifo_th, int dma_mode,
 149                                        unsigned int u32_count, int is_write);
 150extern int gpmc_prefetch_reset(int cs);
 151extern void omap3_gpmc_save_context(void);
 152extern void omap3_gpmc_restore_context(void);
 153extern int gpmc_read_status(int cmd);
 154extern int gpmc_cs_configure(int cs, int cmd, int wval);
 155extern int gpmc_nand_read(int cs, int cmd);
 156extern int gpmc_nand_write(int cs, int cmd, int wval);
 157
 158int gpmc_enable_hwecc(int cs, int mode, int dev_width, int ecc_size);
 159int gpmc_calculate_ecc(int cs, const u_char *dat, u_char *ecc_code);
 160#endif
 161