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-rw-r--r--include/asm-arm/arch-omap/gpmc.h91
1 files changed, 91 insertions, 0 deletions
diff --git a/include/asm-arm/arch-omap/gpmc.h b/include/asm-arm/arch-omap/gpmc.h
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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 << 20)
27#define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29)
28#define GPMC_CONFIG1_READTYPE_SYNC (1 << 29)
29#define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27)
30#define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27)
31#define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
32#define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23)
33#define GPMC_CONFIG1_WAIT_READ_MON (1 << 22)
34#define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21)
35#define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
36#define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16)
37#define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12)
38#define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
39#define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
40#define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
41#define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(1)
42#define GPMC_CONFIG1_MUXADDDATA (1 << 9)
43#define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
44#define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
45#define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
46#define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2))
47#define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
48
49/*
50 * Note that all values in this struct are in nanoseconds, while
51 * the register values are in gpmc_fck cycles.
52 */
53struct gpmc_timings {
54 /* Minimum clock period for synchronous mode */
55 u16 sync_clk;
56
57 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
58 u16 cs_on; /* Assertion time */
59 u16 cs_rd_off; /* Read deassertion time */
60 u16 cs_wr_off; /* Write deassertion time */
61
62 /* ADV signal timings corresponding to GPMC_CONFIG3 */
63 u16 adv_on; /* Assertion time */
64 u16 adv_rd_off; /* Read deassertion time */
65 u16 adv_wr_off; /* Write deassertion time */
66
67 /* WE signals timings corresponding to GPMC_CONFIG4 */
68 u16 we_on; /* WE assertion time */
69 u16 we_off; /* WE deassertion time */
70
71 /* OE signals timings corresponding to GPMC_CONFIG4 */
72 u16 oe_on; /* OE assertion time */
73 u16 oe_off; /* OE deassertion time */
74
75 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
76 u16 page_burst_access; /* Multiple access word delay */
77 u16 access; /* Start-cycle to first data valid delay */
78 u16 rd_cycle; /* Total read cycle time */
79 u16 wr_cycle; /* Total write cycle time */
80};
81
82extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
83
84extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
85extern u32 gpmc_cs_read_reg(int cs, int idx);
86extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
87extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
88extern unsigned long gpmc_cs_get_base_addr(int cs);
89
90
91#endif