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
29 * The following gpmc registers are being used by
30 * nand driver and hence is defined here.
31 * TBD: Move them to gpmc.c by providing appropriate
32 * methods to read and write into these registers
34 #define GPMC_IRQSTATUS 0x18
35 #define GPMC_CONFIG 0x50
36 #define GPMC_STATUS 0x54
37 #define GPMC_CS0_BASE 0x60
38 #define GPMC_CS_SIZE 0x30
41 #define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31)
42 #define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30)
43 #define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29)
44 #define GPMC_CONFIG1_READTYPE_SYNC (1 << 29)
45 #define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)
46 #define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27)
47 #define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27)
48 #define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
49 #define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23)
50 #define GPMC_CONFIG1_WAIT_READ_MON (1 << 22)
51 #define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21)
52 #define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
53 #define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16)
54 #define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12)
55 #define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
56 #define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
57 #define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
58 #define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(1)
59 #define GPMC_CONFIG1_MUXADDDATA (1 << 9)
60 #define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
61 #define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
62 #define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
63 #define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2))
64 #define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
67 * Note that all values in this struct are in nanoseconds, while
68 * the register values are in gpmc_fck cycles.
71 /* Minimum clock period for synchronous mode */
74 /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
75 u16 cs_on; /* Assertion time */
76 u16 cs_rd_off; /* Read deassertion time */
77 u16 cs_wr_off; /* Write deassertion time */
79 /* ADV signal timings corresponding to GPMC_CONFIG3 */
80 u16 adv_on; /* Assertion time */
81 u16 adv_rd_off; /* Read deassertion time */
82 u16 adv_wr_off; /* Write deassertion time */
84 /* WE signals timings corresponding to GPMC_CONFIG4 */
85 u16 we_on; /* WE assertion time */
86 u16 we_off; /* WE deassertion time */
88 /* OE signals timings corresponding to GPMC_CONFIG4 */
89 u16 oe_on; /* OE assertion time */
90 u16 oe_off; /* OE deassertion time */
92 /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
93 u16 page_burst_access; /* Multiple access word delay */
94 u16 access; /* Start-cycle to first data valid delay */
95 u16 rd_cycle; /* Total read cycle time */
96 u16 wr_cycle; /* Total write cycle time */
98 /* The following are only on OMAP3430 */
99 u16 wr_access; /* WRACCESSTIME */
100 u16 wr_data_mux_bus; /* WRDATAONADMUXBUS */
103 extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
104 extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
105 extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
106 extern unsigned long gpmc_get_fclk_period(void);
108 extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
109 extern u32 gpmc_cs_read_reg(int cs, int idx);
110 extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
111 extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
112 extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
113 extern void gpmc_cs_free(int cs);
114 extern int gpmc_cs_set_reserved(int cs, int reserved);
115 extern int gpmc_cs_reserved(int cs);
116 extern void __init gpmc_init(void);