2 * General-Purpose Memory Controller for OMAP2
4 * Copyright (C) 2005-2006 Nokia Corporation
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.
11 #ifndef __OMAP2_GPMC_H
12 #define __OMAP2_GPMC_H
14 /* Maximum Number of Chip Selects */
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
28 #define GPMC_CONFIG 0x50
29 #define GPMC_STATUS 0x54
30 #define GPMC_CS0_BASE 0x60
31 #define GPMC_CS_SIZE 0x30
33 #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31)
34 #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30)
35 #define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29)
36 #define GPMC_CONFIG1_READTYPE_SYNC (1 << 29)
37 #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)
38 #define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27)
39 #define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27)
40 #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
41 #define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23)
42 #define GPMC_CONFIG1_WAIT_READ_MON (1 << 22)
43 #define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21)
44 #define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
45 #define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16)
46 #define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12)
47 #define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
48 #define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
49 #define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
50 #define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(2)
51 #define GPMC_CONFIG1_MUXADDDATA (1 << 9)
52 #define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
53 #define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
54 #define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
55 #define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2))
56 #define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
57 #define GPMC_CONFIG7_CSVALID (1 << 6)
60 * Note that all values in this struct are in nanoseconds, while
61 * the register values are in gpmc_fck cycles.
64 /* Minimum clock period for synchronous mode */
67 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
68 u16 cs_on; /* Assertion time */
69 u16 cs_rd_off; /* Read deassertion time */
70 u16 cs_wr_off; /* Write deassertion time */
72 /* ADV signal timings corresponding to GPMC_CONFIG3 */
73 u16 adv_on; /* Assertion time */
74 u16 adv_rd_off; /* Read deassertion time */
75 u16 adv_wr_off; /* Write deassertion time */
77 /* WE signals timings corresponding to GPMC_CONFIG4 */
78 u16 we_on; /* WE assertion time */
79 u16 we_off; /* WE deassertion time */
81 /* OE signals timings corresponding to GPMC_CONFIG4 */
82 u16 oe_on; /* OE assertion time */
83 u16 oe_off; /* OE deassertion time */
85 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
86 u16 page_burst_access; /* Multiple access word delay */
87 u16 access; /* Start-cycle to first data valid delay */
88 u16 rd_cycle; /* Total read cycle time */
89 u16 wr_cycle; /* Total write cycle time */
91 /* The following are only on OMAP3430 */
92 u16 wr_access; /* WRACCESSTIME */
93 u16 wr_data_mux_bus; /* WRDATAONADMUXBUS */
96 extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
97 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
98 extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
99 extern unsigned long gpmc_get_fclk_period(void);
101 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
102 extern u32 gpmc_cs_read_reg(int cs, int idx);
103 extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
104 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
105 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
106 extern void gpmc_cs_free(int cs);
107 extern int gpmc_cs_set_reserved(int cs, int reserved);
108 extern int gpmc_cs_reserved(int cs);
109 extern int gpmc_prefetch_enable(int cs, int dma_mode,
110 unsigned int u32_count, int is_write);
111 extern void gpmc_prefetch_reset(void);
112 extern int gpmc_prefetch_status(void);
113 extern void omap3_gpmc_save_context(void);
114 extern void omap3_gpmc_restore_context(void);
115 extern void gpmc_init(void);