1 files changed, 116 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm1136/mx35/iomux.c b/arch/arm/cpu/arm1136/mx35/iomux.c
new file mode 100644
index 0000000000..f93191daef
--- /dev/null
+++ b/arch/arm/cpu/arm1136/mx35/iomux.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/mx35_pins.h>
+#include <asm/arch/iomux.h>
+
+/*
+ * IOMUX register (base) addresses
+ */
+enum iomux_reg_addr {
+	IOMUXGPR = IOMUXC_BASE_ADDR,			/* General purpose */
+	IOMUXSW_MUX_CTL = IOMUXC_BASE_ADDR + 4,		/* MUX control */
+	IOMUXSW_MUX_END = IOMUXC_BASE_ADDR + 0x324,	/* last MUX control */
+	IOMUXSW_PAD_CTL = IOMUXC_BASE_ADDR + 0x328,	/* Pad control */
+	IOMUXSW_PAD_END = IOMUXC_BASE_ADDR + 0x794,	/* last Pad control */
+	IOMUXSW_INPUT_CTL = IOMUXC_BASE_ADDR + 0x7AC,	/* input select */
+	IOMUXSW_INPUT_END = IOMUXC_BASE_ADDR + 0x9F4,	/* last input select */
+};
+
+#define MUX_PIN_NUM_MAX		\
+		(((IOMUXSW_PAD_END - IOMUXSW_PAD_CTL) >> 2) + 1)
+#define MUX_INPUT_NUM_MUX	\
+		(((IOMUXSW_INPUT_END - IOMUXSW_INPUT_CTL) >> 2) + 1)
+
+#define PIN_TO_IOMUX_INDEX(pin) ((PIN_TO_IOMUX_PAD(pin) - 0x328) >> 2)
+
+/*
+ * Request ownership for an IO pin. This function has to be the first one
+ * being called before that pin is used.
+ */
+void mxc_request_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
+{
+	u32 mux_reg = PIN_TO_IOMUX_MUX(pin);
+
+	if (mux_reg != NON_MUX_I) {
+		mux_reg += IOMUXGPR;
+		writel(cfg, mux_reg);
+	}
+}
+
+/*
+ * Release ownership for an IO pin
+ */
+void mxc_free_iomux(iomux_pin_name_t pin, iomux_pin_cfg_t cfg)
+{
+}
+
+/*
+ * This function configures the pad value for a IOMUX pin.
+ *
+ * @param  pin     a pin number as defined in iomux_pin_name_t
+ * @param  config  the ORed value of elements defined in iomux_pad_config_t
+ */
+void mxc_iomux_set_pad(iomux_pin_name_t pin, u32 config)
+{
+	u32 pad_reg = IOMUXGPR + PIN_TO_IOMUX_PAD(pin);
+
+	writel(config, pad_reg);
+}
+
+/*
+ * This function enables/disables the general purpose function for a particular
+ * signal.
+ *
+ * @param  gp   one signal as defined in iomux_gp_func_t
+ * @param  en   enable/disable
+ */
+void mxc_iomux_set_gpr(iomux_gp_func_t gp, int en)
+{
+	u32 l;
+
+	l = readl(IOMUXGPR);
+	if (en)
+		l |= gp;
+	else
+		l &= ~gp;
+
+	writel(l, IOMUXGPR);
+}
+
+/*
+ * This function configures input path.
+ *
+ * @param input index of input select register as defined in
+ *			iomux_input_select_t
+ * @param config the binary value of elements defined in
+ *			iomux_input_config_t
+ */
+void mxc_iomux_set_input(iomux_input_select_t input, u32 config)
+{
+	u32 reg = IOMUXSW_INPUT_CTL + (input << 2);
+
+	writel(config, reg);
+}