a2d3e7bad8
This patch adds the context save and restore functions for GPMC to enable off-mode. Signed-off-by: Rajendra Nayak <rnayak@ti.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
116 lines
4.3 KiB
C
116 lines
4.3 KiB
C
/*
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* General-Purpose Memory Controller for OMAP2
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*
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* Copyright (C) 2005-2006 Nokia Corporation
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __OMAP2_GPMC_H
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#define __OMAP2_GPMC_H
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/* Maximum Number of Chip Selects */
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#define GPMC_CS_NUM 8
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#define GPMC_CS_CONFIG1 0x00
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#define GPMC_CS_CONFIG2 0x04
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#define GPMC_CS_CONFIG3 0x08
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#define GPMC_CS_CONFIG4 0x0c
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#define GPMC_CS_CONFIG5 0x10
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#define GPMC_CS_CONFIG6 0x14
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#define GPMC_CS_CONFIG7 0x18
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#define GPMC_CS_NAND_COMMAND 0x1c
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#define GPMC_CS_NAND_ADDRESS 0x20
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#define GPMC_CS_NAND_DATA 0x24
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#define GPMC_CONFIG 0x50
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#define GPMC_STATUS 0x54
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#define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31)
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#define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 30)
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#define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29)
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#define GPMC_CONFIG1_READTYPE_SYNC (1 << 29)
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#define GPMC_CONFIG1_WRITEMULTIPLE_SUPP (1 << 28)
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#define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27)
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#define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27)
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#define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
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#define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23)
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#define GPMC_CONFIG1_WAIT_READ_MON (1 << 22)
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#define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21)
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#define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
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#define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16)
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#define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12)
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#define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
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#define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
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#define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
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#define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(1)
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#define GPMC_CONFIG1_MUXADDDATA (1 << 9)
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#define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
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#define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
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#define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
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#define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2))
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#define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
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#define GPMC_CONFIG7_CSVALID (1 << 6)
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/*
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* Note that all values in this struct are in nanoseconds, while
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* the register values are in gpmc_fck cycles.
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*/
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struct gpmc_timings {
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/* Minimum clock period for synchronous mode */
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u16 sync_clk;
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/* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
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u16 cs_on; /* Assertion time */
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u16 cs_rd_off; /* Read deassertion time */
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u16 cs_wr_off; /* Write deassertion time */
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/* ADV signal timings corresponding to GPMC_CONFIG3 */
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u16 adv_on; /* Assertion time */
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u16 adv_rd_off; /* Read deassertion time */
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u16 adv_wr_off; /* Write deassertion time */
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/* WE signals timings corresponding to GPMC_CONFIG4 */
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u16 we_on; /* WE assertion time */
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u16 we_off; /* WE deassertion time */
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/* OE signals timings corresponding to GPMC_CONFIG4 */
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u16 oe_on; /* OE assertion time */
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u16 oe_off; /* OE deassertion time */
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/* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
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u16 page_burst_access; /* Multiple access word delay */
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u16 access; /* Start-cycle to first data valid delay */
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u16 rd_cycle; /* Total read cycle time */
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u16 wr_cycle; /* Total write cycle time */
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/* The following are only on OMAP3430 */
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u16 wr_access; /* WRACCESSTIME */
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u16 wr_data_mux_bus; /* WRDATAONADMUXBUS */
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};
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extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
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extern unsigned int gpmc_ticks_to_ns(unsigned int ticks);
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extern unsigned int gpmc_round_ns_to_ticks(unsigned int time_ns);
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extern unsigned long gpmc_get_fclk_period(void);
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extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
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extern u32 gpmc_cs_read_reg(int cs, int idx);
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extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
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extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
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extern int gpmc_cs_request(int cs, unsigned long size, unsigned long *base);
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extern void gpmc_cs_free(int cs);
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extern int gpmc_cs_set_reserved(int cs, int reserved);
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extern int gpmc_cs_reserved(int cs);
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extern int gpmc_prefetch_enable(int cs, int dma_mode,
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unsigned int u32_count, int is_write);
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extern void gpmc_prefetch_reset(void);
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extern int gpmc_prefetch_status(void);
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extern void omap3_gpmc_save_context(void);
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extern void omap3_gpmc_restore_context(void);
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extern void __init gpmc_init(void);
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#endif
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