From a6e961c2923ec7a5351c16cd202d9376e44eaa3b Mon Sep 17 00:00:00 2001
From: Fabio Estevam <fabio.estevam@freescale.com>
Date: Tue, 7 Jun 2011 07:02:52 +0000
Subject: [PATCH] MX5: Introduce a function for setting the chip select size
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
arch/arm/cpu/armv7/mx5/soc.c | 30 +++++++++++++++++++++++
arch/arm/include/asm/arch-mx5/imx-regs.h | 5 ++++
arch/arm/include/asm/arch-mx5/sys_proto.h | 2 +-
3 files changed, 36 insertions(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv7/mx5/soc.c b/arch/arm/cpu/armv7/mx5/soc.c
index 40b8b5640b..c6106d5210 100644
--- a/arch/arm/cpu/armv7/mx5/soc.c
+++ b/arch/arm/cpu/armv7/mx5/soc.c
@@ -163,6 +163,36 @@ int cpu_mmc_init(bd_t *bis)
#endif
}
+void set_chipselect_size(int const cs_size)
+{
+ unsigned int reg;
+ struct iomuxc *iomuxc_regs = (struct iomuxc *)IOMUXC_BASE_ADDR;
+ reg = readl(&iomuxc_regs->gpr1);
+
+ switch (cs_size) {
+ case CS0_128:
+ reg &= ~0x7; /* CS0=128MB, CS1=0, CS2=0, CS3=0 */
+ reg |= 0x5;
+ break;
+ case CS0_64M_CS1_64M:
+ reg &= ~0x3F; /* CS0=64MB, CS1=64MB, CS2=0, CS3=0 */
+ reg |= 0x1B;
+ break;
+ case CS0_64M_CS1_32M_CS2_32M:
+ reg &= ~0x1FF; /* CS0=64MB, CS1=32MB, CS2=32MB, CS3=0 */
+ reg |= 0x4B;
+ break;
+ case CS0_32M_CS1_32M_CS2_32M_CS3_32M:
+ reg &= ~0xFFF; /* CS0=32MB, CS1=32MB, CS2=32MB, CS3=32MB */
+ reg |= 0x249;
+ break;
+ default:
+ printf("Unknown chip select size: %d\n", cs_size);
+ break;
+ }
+
+ writel(reg, &iomuxc_regs->gpr1);
+}
void reset_cpu(ulong addr)
{
diff --git a/arch/arm/include/asm/arch-mx5/imx-regs.h b/arch/arm/include/asm/arch-mx5/imx-regs.h
index 1dac6fa145..9589a62a12 100644
--- a/arch/arm/include/asm/arch-mx5/imx-regs.h
+++ b/arch/arm/include/asm/arch-mx5/imx-regs.h
@@ -214,6 +214,11 @@
#define WDOG_EN (1 << 8)
#define WDOG_LIMIT(x) (((x) & 0x3) << 9)
+#define CS0_128 0
+#define CS0_64M_CS1_64M 1
+#define CS0_64M_CS1_32M_CS2_32M 2
+#define CS0_32M_CS1_32M_CS2_32M_CS3_32M 3
+
/*
* Number of GPIO pins per port
*/
diff --git a/arch/arm/include/asm/arch-mx5/sys_proto.h b/arch/arm/include/asm/arch-mx5/sys_proto.h
index f687503cad..ce63675629 100644
--- a/arch/arm/include/asm/arch-mx5/sys_proto.h
+++ b/arch/arm/include/asm/arch-mx5/sys_proto.h
@@ -27,5 +27,5 @@
u32 get_cpu_rev(void);
#define is_soc_rev(rev) ((get_cpu_rev() & 0xFF) - rev)
void sdelay(unsigned long);
-
+void set_chipselect_size(int const);
#endif
--
2.39.5