arch/arm/plat-omap/include/mach/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 #define GPMC_CS_CONFIG1         0x00
  15 #define GPMC_CS_CONFIG2         0x04
  16 #define GPMC_CS_CONFIG3         0x08
  17 #define GPMC_CS_CONFIG4         0x0c
  18 #define GPMC_CS_CONFIG5         0x10
  19 #define GPMC_CS_CONFIG6         0x14
  20 #define GPMC_CS_CONFIG7         0x18
  21 #define GPMC_CS_NAND_COMMAND    0x1c
  22 #define GPMC_CS_NAND_ADDRESS    0x20
  23 #define GPMC_CS_NAND_DATA       0x24
  24
  25 #define GPMC_CONFIG1_WRAPBURST_SUPP     (1 << 31)
  26 #define GPMC_CONFIG1_READMULTIPLE_SUPP  (1 << 30)
  27 #define GPMC_CONFIG1_READTYPE_ASYNC     (0 << 29)
  28 #define GPMC_CONFIG1_READTYPE_SYNC      (1 << 29)
  29 #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)
  30 #define GPMC_CONFIG1_WRITETYPE_ASYNC    (0 << 27)
  31 #define GPMC_CONFIG1_WRITETYPE_SYNC     (1 << 27)
  32 #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
  33 #define GPMC_CONFIG1_PAGE_LEN(val)      ((val & 3) << 23)
  34 #define GPMC_CONFIG1_WAIT_READ_MON      (1 << 22)
  35 #define GPMC_CONFIG1_WAIT_WRITE_MON     (1 << 21)
  36 #define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
  37 #define GPMC_CONFIG1_WAIT_PIN_SEL(val)  ((val & 3) << 16)
  38 #define GPMC_CONFIG1_DEVICESIZE(val)    ((val & 3) << 12)
  39 #define GPMC_CONFIG1_DEVICESIZE_16      GPMC_CONFIG1_DEVICESIZE(1)
  40 #define GPMC_CONFIG1_DEVICETYPE(val)    ((val & 3) << 10)
  41 #define GPMC_CONFIG1_DEVICETYPE_NOR     GPMC_CONFIG1_DEVICETYPE(0)
  42 #define GPMC_CONFIG1_DEVICETYPE_NAND    GPMC_CONFIG1_DEVICETYPE(1)
  43 #define GPMC_CONFIG1_MUXADDDATA         (1 << 9)
  44 #define GPMC_CONFIG1_TIME_PARA_GRAN     (1 << 4)
  45 #define GPMC_CONFIG1_FCLK_DIV(val)      (val & 3)
  46 #define GPMC_CONFIG1_FCLK_DIV2          (GPMC_CONFIG1_FCLK_DIV(1))
  47 #define GPMC_CONFIG1_FCLK_DIV3          (GPMC_CONFIG1_FCLK_DIV(2))
  48 #define GPMC_CONFIG1_FCLK_DIV4          (GPMC_CONFIG1_FCLK_DIV(3))
  49
  50 /*
  51  * Note that all values in this struct are in nanoseconds, while
  52  * the register values are in gpmc_fck cycles.
  53  */
  54 struct gpmc_timings {
  55         /* Minimum clock period for synchronous mode */
  56         u16 sync_clk;
  57
  58         /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
  59         u16 cs_on;              /* Assertion time */
  60         u16 cs_rd_off;          /* Read deassertion time */
  61         u16 cs_wr_off;          /* Write deassertion time */
  62
  63         /* ADV signal timings corresponding to GPMC_CONFIG3 */
  64         u16 adv_on;             /* Assertion time */
  65         u16 adv_rd_off;         /* Read deassertion time */
  66         u16 adv_wr_off;         /* Write deassertion time */
  67
  68         /* WE signals timings corresponding to GPMC_CONFIG4 */
  69         u16 we_on;              /* WE assertion time */
  70         u16 we_off;             /* WE deassertion time */
  71
  72         /* OE signals timings corresponding to GPMC_CONFIG4 */
  73         u16 oe_on;              /* OE assertion time */
  74         u16 oe_off;             /* OE deassertion time */
  75
  76         /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
  77         u16 page_burst_access;  /* Multiple access word delay */
  78         u16 access;             /* Start-cycle to first data valid delay */
  79         u16 rd_cycle;           /* Total read cycle time */
  80         u16 wr_cycle;           /* Total write cycle time */
  81 };
  82
  83 extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
  84 extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
  85 extern unsigned long gpmc_get_fclk_period(void);
  86
  87 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
  88 extern u32 gpmc_cs_read_reg(int cs, int idx);
  89 extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
  90 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
  91 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
  92 extern void gpmc_cs_free(int cs);
  93 extern int gpmc_cs_set_reserved(int cs, int reserved);
  94 extern int gpmc_cs_reserved(int cs);
  95
  96 #endif