1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/keystone/aemif.c b/arch/arm/cpu/armv7/keystone/aemif.c
new file mode 100644
index 0000000..9b26886
--- /dev/null
+++ b/arch/arm/cpu/armv7/keystone/aemif.c
@@ -0,0 +1,71 @@
+/*
+ * Keystone2: Asynchronous EMIF Configuration
+ *
+ * (C) Copyright 2012-2014
+ *     Texas Instruments Incorporated, <www.ti.com>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/emif_defs.h>
+
+#define AEMIF_CFG_SELECT_STROBE(v)	((v) ? 1 << 31 : 0)
+#define AEMIF_CFG_EXTEND_WAIT(v)	((v) ? 1 << 30 : 0)
+#define AEMIF_CFG_WR_SETUP(v)		(((v) & 0x0f) << 26)
+#define AEMIF_CFG_WR_STROBE(v)		(((v) & 0x3f) << 20)
+#define AEMIF_CFG_WR_HOLD(v)		(((v) & 0x07) << 17)
+#define AEMIF_CFG_RD_SETUP(v)		(((v) & 0x0f) << 13)
+#define AEMIF_CFG_RD_STROBE(v)		(((v) & 0x3f) << 7)
+#define AEMIF_CFG_RD_HOLD(v)		(((v) & 0x07) << 4)
+#define AEMIF_CFG_TURN_AROUND(v)	(((v) & 0x03) << 2)
+#define AEMIF_CFG_WIDTH(v)		(((v) & 0x03) << 0)
+
+#define set_config_field(reg, field, val)			\
+	do {							\
+		if (val != -1) {				\
+			reg &= ~AEMIF_CFG_##field(0xffffffff);	\
+			reg |=	AEMIF_CFG_##field(val);		\
+		}						\
+	} while (0)
+
+void configure_async_emif(int cs, struct async_emif_config *cfg)
+{
+	unsigned long tmp;
+
+	if (cfg->mode == ASYNC_EMIF_MODE_NAND) {
+		tmp = __raw_readl(&davinci_emif_regs->nandfcr);
+		tmp |= (1 << cs);
+		__raw_writel(tmp, &davinci_emif_regs->nandfcr);
+
+	} else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
+		tmp = __raw_readl(&davinci_emif_regs->one_nand_cr);
+		tmp |= (1 << cs);
+		__raw_writel(tmp, &davinci_emif_regs->one_nand_cr);
+	}
+
+	tmp = __raw_readl(&davinci_emif_regs->abncr[cs]);
+
+	set_config_field(tmp, SELECT_STROBE,	cfg->select_strobe);
+	set_config_field(tmp, EXTEND_WAIT,	cfg->extend_wait);
+	set_config_field(tmp, WR_SETUP,		cfg->wr_setup);
+	set_config_field(tmp, WR_STROBE,	cfg->wr_strobe);
+	set_config_field(tmp, WR_HOLD,		cfg->wr_hold);
+	set_config_field(tmp, RD_SETUP,		cfg->rd_setup);
+	set_config_field(tmp, RD_STROBE,	cfg->rd_strobe);
+	set_config_field(tmp, RD_HOLD,		cfg->rd_hold);
+	set_config_field(tmp, TURN_AROUND,	cfg->turn_around);
+	set_config_field(tmp, WIDTH,		cfg->width);
+
+	__raw_writel(tmp, &davinci_emif_regs->abncr[cs]);
+}
+
+void init_async_emif(int num_cs, struct async_emif_config *config)
+{
+	int cs;
+
+	for (cs = 0; cs < num_cs; cs++)
+		configure_async_emif(cs, config + cs);
+}