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-rw-r--r--arch/arm/mach-imx/iomux-v1.c189
1 files changed, 189 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/iomux-v1.c b/arch/arm/mach-imx/iomux-v1.c
new file mode 100644
index 00000000000..2b156d1d9e2
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+++ b/arch/arm/mach-imx/iomux-v1.c
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+/*
+ * arch/arm/plat-mxc/iomux-v1.c
+ *
+ * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH
+ * Copyright (C) 2009 Uwe Kleine-Koenig, Pengutronix
+ *
+ * Common code for i.MX1, i.MX21 and i.MX27
+ *
+ * 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/gpio.h>
+
+#include <asm/mach/map.h>
+
+#include "hardware.h"
+#include "iomux-v1.h"
+
+static void __iomem *imx_iomuxv1_baseaddr;
+static unsigned imx_iomuxv1_numports;
+
+static inline unsigned long imx_iomuxv1_readl(unsigned offset)
+{
+ return __raw_readl(imx_iomuxv1_baseaddr + offset);
+}
+
+static inline void imx_iomuxv1_writel(unsigned long val, unsigned offset)
+{
+ __raw_writel(val, imx_iomuxv1_baseaddr + offset);
+}
+
+static inline void imx_iomuxv1_rmwl(unsigned offset,
+ unsigned long mask, unsigned long value)
+{
+ unsigned long reg = imx_iomuxv1_readl(offset);
+
+ reg &= ~mask;
+ reg |= value;
+
+ imx_iomuxv1_writel(reg, offset);
+}
+
+static inline void imx_iomuxv1_set_puen(
+ unsigned int port, unsigned int pin, int on)
+{
+ unsigned long mask = 1 << pin;
+
+ imx_iomuxv1_rmwl(MXC_PUEN(port), mask, on ? mask : 0);
+}
+
+static inline void imx_iomuxv1_set_ddir(
+ unsigned int port, unsigned int pin, int out)
+{
+ unsigned long mask = 1 << pin;
+
+ imx_iomuxv1_rmwl(MXC_DDIR(port), mask, out ? mask : 0);
+}
+
+static inline void imx_iomuxv1_set_gpr(
+ unsigned int port, unsigned int pin, int af)
+{
+ unsigned long mask = 1 << pin;
+
+ imx_iomuxv1_rmwl(MXC_GPR(port), mask, af ? mask : 0);
+}
+
+static inline void imx_iomuxv1_set_gius(
+ unsigned int port, unsigned int pin, int inuse)
+{
+ unsigned long mask = 1 << pin;
+
+ imx_iomuxv1_rmwl(MXC_GIUS(port), mask, inuse ? mask : 0);
+}
+
+static inline void imx_iomuxv1_set_ocr(
+ unsigned int port, unsigned int pin, unsigned int ocr)
+{
+ unsigned long shift = (pin & 0xf) << 1;
+ unsigned long mask = 3 << shift;
+ unsigned long value = ocr << shift;
+ unsigned long offset = pin < 16 ? MXC_OCR1(port) : MXC_OCR2(port);
+
+ imx_iomuxv1_rmwl(offset, mask, value);
+}
+
+static inline void imx_iomuxv1_set_iconfa(
+ unsigned int port, unsigned int pin, unsigned int aout)
+{
+ unsigned long shift = (pin & 0xf) << 1;
+ unsigned long mask = 3 << shift;
+ unsigned long value = aout << shift;
+ unsigned long offset = pin < 16 ? MXC_ICONFA1(port) : MXC_ICONFA2(port);
+
+ imx_iomuxv1_rmwl(offset, mask, value);
+}
+
+static inline void imx_iomuxv1_set_iconfb(
+ unsigned int port, unsigned int pin, unsigned int bout)
+{
+ unsigned long shift = (pin & 0xf) << 1;
+ unsigned long mask = 3 << shift;
+ unsigned long value = bout << shift;
+ unsigned long offset = pin < 16 ? MXC_ICONFB1(port) : MXC_ICONFB2(port);
+
+ imx_iomuxv1_rmwl(offset, mask, value);
+}
+
+int mxc_gpio_mode(int gpio_mode)
+{
+ unsigned int pin = gpio_mode & GPIO_PIN_MASK;
+ unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
+ unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
+ unsigned int aout = (gpio_mode >> GPIO_AOUT_SHIFT) & 3;
+ unsigned int bout = (gpio_mode >> GPIO_BOUT_SHIFT) & 3;
+
+ if (port >= imx_iomuxv1_numports)
+ return -EINVAL;
+
+ /* Pullup enable */
+ imx_iomuxv1_set_puen(port, pin, gpio_mode & GPIO_PUEN);
+
+ /* Data direction */
+ imx_iomuxv1_set_ddir(port, pin, gpio_mode & GPIO_OUT);
+
+ /* Primary / alternate function */
+ imx_iomuxv1_set_gpr(port, pin, gpio_mode & GPIO_AF);
+
+ /* use as gpio? */
+ imx_iomuxv1_set_gius(port, pin, !(gpio_mode & (GPIO_PF | GPIO_AF)));
+
+ imx_iomuxv1_set_ocr(port, pin, ocr);
+
+ imx_iomuxv1_set_iconfa(port, pin, aout);
+
+ imx_iomuxv1_set_iconfb(port, pin, bout);
+
+ return 0;
+}
+EXPORT_SYMBOL(mxc_gpio_mode);
+
+static int imx_iomuxv1_setup_multiple(const int *list, unsigned count)
+{
+ size_t i;
+ int ret = 0;
+
+ for (i = 0; i < count; ++i) {
+ ret = mxc_gpio_mode(list[i]);
+
+ if (ret)
+ return ret;
+ }
+
+ return ret;
+}
+
+int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
+ const char *label)
+{
+ int ret;
+
+ ret = imx_iomuxv1_setup_multiple(pin_list, count);
+ return ret;
+}
+EXPORT_SYMBOL(mxc_gpio_setup_multiple_pins);
+
+int __init imx_iomuxv1_init(void __iomem *base, int numports)
+{
+ imx_iomuxv1_baseaddr = base;
+ imx_iomuxv1_numports = numports;
+
+ return 0;
+}