ARM1176: TI: TNETV107X soc initial support

TNETV107X is a Texas Instruments SoC based on an ARM1176 core, and with a
bunch on on-chip integrated peripherals.  This is an initial commit with
basic functionality, more commits with drivers, etc. to follow.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 93 insertions, 0 deletions

diff --git a/arch/arm/cpu/arm1176/tnetv107x/aemif.c b/arch/arm/cpu/arm1176/tnetv107x/aemif.c
new file mode 100644
index 0000000..172f583
--- /dev/null
+++ b/arch/arm/cpu/arm1176/tnetv107x/aemif.c
@@ -0,0 +1,93 @@
+/*
+ * TNETV107X: Asynchronous EMIF Configuration
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/mux.h>
+
+#define ASYNC_EMIF_BASE			TNETV107X_ASYNC_EMIF_CNTRL_BASE
+#define ASYNC_EMIF_CONFIG(cs)		(ASYNC_EMIF_BASE+0x10+(cs)*4)
+#define ASYNC_EMIF_ONENAND_CONTROL	(ASYNC_EMIF_BASE+0x5c)
+#define ASYNC_EMIF_NAND_CONTROL		(ASYNC_EMIF_BASE+0x60)
+#define ASYNC_EMIF_WAITCYCLE_CONFIG	(ASYNC_EMIF_BASE+0x4)
+
+#define CONFIG_SELECT_STROBE(v)		((v) ? 1 << 31 : 0)
+#define CONFIG_EXTEND_WAIT(v)		((v) ? 1 << 30 : 0)
+#define CONFIG_WR_SETUP(v)		(((v) & 0x0f) << 26)
+#define CONFIG_WR_STROBE(v)		(((v) & 0x3f) << 20)
+#define CONFIG_WR_HOLD(v)		(((v) & 0x07) << 17)
+#define CONFIG_RD_SETUP(v)		(((v) & 0x0f) << 13)
+#define CONFIG_RD_STROBE(v)		(((v) & 0x3f) << 7)
+#define CONFIG_RD_HOLD(v)		(((v) & 0x07) << 4)
+#define CONFIG_TURN_AROUND(v)		(((v) & 0x03) << 2)
+#define CONFIG_WIDTH(v)			(((v) & 0x03) << 0)
+
+#define NUM_CS				4
+
+#define set_config_field(reg, field, val)			\
+	do {							\
+		if (val != -1) {				\
+			reg &= ~CONFIG_##field(0xffffffff);	\
+			reg |=	CONFIG_##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(ASYNC_EMIF_NAND_CONTROL);
+		tmp |= (1 << cs);
+		__raw_writel(tmp, ASYNC_EMIF_NAND_CONTROL);
+
+	} else if (cfg->mode == ASYNC_EMIF_MODE_ONENAND) {
+		tmp = __raw_readl(ASYNC_EMIF_ONENAND_CONTROL);
+		tmp |= (1 << cs);
+		__raw_writel(tmp, ASYNC_EMIF_ONENAND_CONTROL);
+	}
+
+	tmp = __raw_readl(ASYNC_EMIF_CONFIG(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, ASYNC_EMIF_CONFIG(cs));
+}
+
+void init_async_emif(int num_cs, struct async_emif_config *config)
+{
+	int cs;
+
+	clk_enable(TNETV107X_LPSC_AEMIF);
+
+	for (cs = 0; cs < num_cs; cs++)
+		configure_async_emif(cs, config + cs);
+}