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authorJuha Yrjola <juha.yrjola@solidboot.com>2006-06-26 16:16:16 -0700
committerTony Lindgren <tony@atomide.com>2006-06-26 16:16:16 -0700
commit4bbbc1adc2095c6504a556819dd8842135df300b (patch)
tree79fa777108427b2bc824ca2b2b5c4eefb7fc2e90 /include/asm-arm
parent7ff879dbcd2083c95933a56bce65ae45ecab3f35 (diff)
ARM: OMAP: Add GPMC support for OMAP2
Implement basic support for General-Purpose Memory Controller as found on OMAP2420. Dynamic CS address space allocation still needs to be done. Signed-off-by: Juha Yrjola <juha.yrjola@solidboot.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'include/asm-arm')
-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
new file mode 100644
index 00000000000..1a0a5207822
--- /dev/null
+++ b/include/asm-arm/arch-omap/gpmc.h
@@ -0,0 +1,91 @@
+/*
+ * General-Purpose Memory Controller for OMAP2
+ *
+ * Copyright (C) 2005-2006 Nokia Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __OMAP2_GPMC_H
+#define __OMAP2_GPMC_H
+
+#define GPMC_CS_CONFIG1 0x00
+#define GPMC_CS_CONFIG2 0x04
+#define GPMC_CS_CONFIG3 0x08
+#define GPMC_CS_CONFIG4 0x0c
+#define GPMC_CS_CONFIG5 0x10
+#define GPMC_CS_CONFIG6 0x14
+#define GPMC_CS_CONFIG7 0x18
+#define GPMC_CS_NAND_COMMAND 0x1c
+#define GPMC_CS_NAND_ADDRESS 0x20
+#define GPMC_CS_NAND_DATA 0x24
+
+#define GPMC_CONFIG1_WRAPBURST_SUPP (1 << 31)
+#define GPMC_CONFIG1_READMULTIPLE_SUPP (1 << 20)
+#define GPMC_CONFIG1_READTYPE_ASYNC (0 << 29)
+#define GPMC_CONFIG1_READTYPE_SYNC (1 << 29)
+#define GPMC_CONFIG1_WRITETYPE_ASYNC (0 << 27)
+#define GPMC_CONFIG1_WRITETYPE_SYNC (1 << 27)
+#define GPMC_CONFIG1_CLKACTIVATIONTIME(val) ((val & 3) << 25)
+#define GPMC_CONFIG1_PAGE_LEN(val) ((val & 3) << 23)
+#define GPMC_CONFIG1_WAIT_READ_MON (1 << 22)
+#define GPMC_CONFIG1_WAIT_WRITE_MON (1 << 21)
+#define GPMC_CONFIG1_WAIT_MON_IIME(val) ((val & 3) << 18)
+#define GPMC_CONFIG1_WAIT_PIN_SEL(val) ((val & 3) << 16)
+#define GPMC_CONFIG1_DEVICESIZE(val) ((val & 3) << 12)
+#define GPMC_CONFIG1_DEVICESIZE_16 GPMC_CONFIG1_DEVICESIZE(1)
+#define GPMC_CONFIG1_DEVICETYPE(val) ((val & 3) << 10)
+#define GPMC_CONFIG1_DEVICETYPE_NOR GPMC_CONFIG1_DEVICETYPE(0)
+#define GPMC_CONFIG1_DEVICETYPE_NAND GPMC_CONFIG1_DEVICETYPE(1)
+#define GPMC_CONFIG1_MUXADDDATA (1 << 9)
+#define GPMC_CONFIG1_TIME_PARA_GRAN (1 << 4)
+#define GPMC_CONFIG1_FCLK_DIV(val) (val & 3)
+#define GPMC_CONFIG1_FCLK_DIV2 (GPMC_CONFIG1_FCLK_DIV(1))
+#define GPMC_CONFIG1_FCLK_DIV3 (GPMC_CONFIG1_FCLK_DIV(2))
+#define GPMC_CONFIG1_FCLK_DIV4 (GPMC_CONFIG1_FCLK_DIV(3))
+
+/*
+ * Note that all values in this struct are in nanoseconds, while
+ * the register values are in gpmc_fck cycles.
+ */
+struct gpmc_timings {
+ /* Minimum clock period for synchronous mode */
+ u16 sync_clk;
+
+ /* Chip-select signal timings corresponding to GPMC_CS_CONFIG2 */
+ u16 cs_on; /* Assertion time */
+ u16 cs_rd_off; /* Read deassertion time */
+ u16 cs_wr_off; /* Write deassertion time */
+
+ /* ADV signal timings corresponding to GPMC_CONFIG3 */
+ u16 adv_on; /* Assertion time */
+ u16 adv_rd_off; /* Read deassertion time */
+ u16 adv_wr_off; /* Write deassertion time */
+
+ /* WE signals timings corresponding to GPMC_CONFIG4 */
+ u16 we_on; /* WE assertion time */
+ u16 we_off; /* WE deassertion time */
+
+ /* OE signals timings corresponding to GPMC_CONFIG4 */
+ u16 oe_on; /* OE assertion time */
+ u16 oe_off; /* OE deassertion time */
+
+ /* Access time and cycle time timings corresponding to GPMC_CONFIG5 */
+ u16 page_burst_access; /* Multiple access word delay */
+ u16 access; /* Start-cycle to first data valid delay */
+ u16 rd_cycle; /* Total read cycle time */
+ u16 wr_cycle; /* Total write cycle time */
+};
+
+extern unsigned int gpmc_ns_to_ticks(unsigned int time_ns);
+
+extern void gpmc_cs_write_reg(int cs, int idx, u32 val);
+extern u32 gpmc_cs_read_reg(int cs, int idx);
+extern int gpmc_cs_calc_divider(int cs, unsigned int sync_clk);
+extern int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t);
+extern unsigned long gpmc_cs_get_base_addr(int cs);
+
+
+#endif