1 files changed, 105 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/nand.c b/arch/arm/mach-imx/nand.c
new file mode 100644
index 0000000000..5b5f78ba08
--- /dev/null
+++ b/arch/arm/mach-imx/nand.c
@@ -0,0 +1,105 @@
+/*
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <mach/imx-regs.h>
+#include <asm/io.h>
+
+#if defined(CONFIG_ARCH_IMX35) || defined (CONFIG_ARCH_IMX25)
+
+#define RCSR_NFC_FMS		(1 << 8)
+#define RCSR_NFC_4K		(1 << 9)
+#define RCSR_NFC_16BIT_SEL	(1 << 14)
+
+void imx_nand_set_layout(int writesize, int datawidth)
+{
+	unsigned int rcsr;
+
+	rcsr = readl(IMX_CCM_BASE + CCM_RCSR);
+
+	switch (writesize) {
+	case 512:
+		rcsr &= ~(RCSR_NFC_FMS | RCSR_NFC_4K);
+		break;
+	case 2048:
+		rcsr |= RCSR_NFC_FMS;
+		break;
+	case 4096:
+		rcsr |= RCSR_NFC_FMS | RCSR_NFC_4K;
+		break;
+	default:
+		break;
+	}
+
+	switch (datawidth) {
+	case 8:
+		rcsr &= ~RCSR_NFC_16BIT_SEL;
+		break;
+	case 16:
+		rcsr |= RCSR_NFC_16BIT_SEL;
+		break;
+	default:
+		break;
+	}
+
+	writel(rcsr, IMX_CCM_BASE + CCM_RCSR);
+}
+
+#elif defined CONFIG_ARCH_IMX27
+
+#define FMCR_NF_FMS		(1 << 5)
+#define FMCR_NF_16BIT_SEL	(1 << 4)
+
+void imx_nand_set_layout(int writesize, int datawidth)
+{
+	unsigned int fmcr;
+
+	fmcr = readl(FMCR);
+
+	switch (writesize) {
+	case 512:
+		fmcr &= FMCR_NF_FMS;
+		break;
+	case 2048:
+		fmcr |= FMCR_NF_FMS;
+		break;
+	default:
+		break;
+	}
+
+	switch (datawidth) {
+	case 8:
+		fmcr &= ~FMCR_NF_16BIT_SEL;
+		break;
+	case 16:
+		fmcr |= FMCR_NF_16BIT_SEL;
+		break;
+	default:
+		break;
+	}
+
+	writel(fmcr, FMCR);
+}
+
+#else
+#warning using empty imx_nand_set_layout(). NAND flash will not work properly if not booting from it
+
+void imx_nand_set_layout(int writesize, int datawidth)
+{
+}
+
+#endif