1 files changed, 238 insertions, 0 deletions

diff --git a/arch/arm/plat-mxc/iomux-v1.c b/arch/arm/plat-mxc/iomux-v1.c
new file mode 100644
index 000000000000..960a02cbcbaf
--- /dev/null
+++ b/arch/arm/plat-mxc/iomux-v1.c
@@ -0,0 +1,238 @@
+/*
+ * 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 <mach/hardware.h>
+#include <asm/mach/map.h>
+#include <mach/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;
+
+        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)
+{
+        size_t i;
+        int ret;
+
+        for (i = 0; i < count; ++i) {
+                unsigned gpio = pin_list[i] & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+
+                ret = gpio_request(gpio, label);
+                if (ret)
+                        goto err_gpio_request;
+        }
+
+        ret = imx_iomuxv1_setup_multiple(pin_list, count);
+        if (ret)
+                goto err_setup;
+
+        return 0;
+
+err_setup:
+        BUG_ON(i != count);
+
+err_gpio_request:
+        mxc_gpio_release_multiple_pins(pin_list, i);
+
+        return ret;
+}
+EXPORT_SYMBOL(mxc_gpio_setup_multiple_pins);
+
+void mxc_gpio_release_multiple_pins(const int *pin_list, int count)
+{
+        size_t i;
+
+        for (i = 0; i < count; ++i) {
+                unsigned gpio = pin_list[i] & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+
+                gpio_free(gpio);
+        }
+}
+EXPORT_SYMBOL(mxc_gpio_release_multiple_pins);
+
+static int imx_iomuxv1_init(void)
+{
+#ifdef CONFIG_ARCH_MX1
+        if (cpu_is_mx1()) {
+                imx_iomuxv1_baseaddr = MX1_IO_ADDRESS(MX1_GPIO_BASE_ADDR);
+                imx_iomuxv1_numports = MX1_NUM_GPIO_PORT;
+        } else
+#endif
+#ifdef CONFIG_MACH_MX21
+        if (cpu_is_mx21()) {
+                imx_iomuxv1_baseaddr = MX21_IO_ADDRESS(MX21_GPIO_BASE_ADDR);
+                imx_iomuxv1_numports = MX21_NUM_GPIO_PORT;
+        } else
+#endif
+#ifdef CONFIG_MACH_MX27
+        if (cpu_is_mx27()) {
+                imx_iomuxv1_baseaddr = MX27_IO_ADDRESS(MX27_GPIO_BASE_ADDR);
+                imx_iomuxv1_numports = MX27_NUM_GPIO_PORT;
+        } else
+#endif
+                return -ENODEV;
+
+        return 0;
+}
+pure_initcall(imx_iomuxv1_init);