[PATCH 29/39] arm/imx/iomux-v1: make base address a runtime choice
Uwe Kleine-König
u.kleine-koenig at pengutronix.de
Wed Feb 24 05:08:24 EST 2010
While at it move register modification to static inlines and
so make the relevant code more readable.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
---
arch/arm/plat-mxc/include/mach/iomux.h | 1 -
arch/arm/plat-mxc/iomux-v1.c | 193 +++++++++++++++++++++-----------
2 files changed, 127 insertions(+), 67 deletions(-)
diff --git a/arch/arm/plat-mxc/include/mach/iomux.h b/arch/arm/plat-mxc/include/mach/iomux.h
index 011cfcd..e15d28a 100644
--- a/arch/arm/plat-mxc/include/mach/iomux.h
+++ b/arch/arm/plat-mxc/include/mach/iomux.h
@@ -24,7 +24,6 @@
* GPIO Module and I/O Multiplexer
* x = 0..3 for reg_A, reg_B, reg_C, reg_D
*/
-#define VA_GPIO_BASE IO_ADDRESS(GPIO_BASE_ADDR)
#define MXC_DDIR(x) (0x00 + ((x) << 8))
#define MXC_OCR1(x) (0x04 + ((x) << 8))
#define MXC_OCR2(x) (0x08 + ((x) << 8))
diff --git a/arch/arm/plat-mxc/iomux-v1.c b/arch/arm/plat-mxc/iomux-v1.c
index 0b74568..aeaf295 100644
--- a/arch/arm/plat-mxc/iomux-v1.c
+++ b/arch/arm/plat-mxc/iomux-v1.c
@@ -1,9 +1,8 @@
/*
* arch/arm/plat-mxc/iomux-v1.c
*
- * author: Sascha Hauer
- * Created: april 20th, 2004
- * Copyright: Synertronixx GmbH
+ * Copyright (C) 2004 Sascha Hauer, Synertronixx GmbH
+ * Copyright (C) 2009 Uwe Kleine-Koenig, Pengutronix
*
* Common code for i.MX1, i.MX21 and i.MX27
*
@@ -18,9 +17,8 @@
* 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
- *
+ * 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>
@@ -34,78 +32,119 @@
#include <asm/mach/map.h>
#include <mach/iomux.h>
+static void __iomem *imx_iomuxv1_baseaddr;
+
+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);
+}
+
void 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 tmp;
+ unsigned int aout = (gpio_mode >> GPIO_AOUT_SHIFT) & 3;
+ unsigned int bout = (gpio_mode >> GPIO_BOUT_SHIFT) & 3;
/* Pullup enable */
- tmp = __raw_readl(VA_GPIO_BASE + MXC_PUEN(port));
- if (gpio_mode & GPIO_PUEN)
- tmp |= (1 << pin);
- else
- tmp &= ~(1 << pin);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_PUEN(port));
+ imx_iomuxv1_set_puen(port, pin, gpio_mode & GPIO_PUEN);
/* Data direction */
- tmp = __raw_readl(VA_GPIO_BASE + MXC_DDIR(port));
- if (gpio_mode & GPIO_OUT)
- tmp |= 1 << pin;
- else
- tmp &= ~(1 << pin);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_DDIR(port));
+ imx_iomuxv1_set_ddir(port, pin, gpio_mode & GPIO_OUT);
/* Primary / alternate function */
- tmp = __raw_readl(VA_GPIO_BASE + MXC_GPR(port));
- if (gpio_mode & GPIO_AF)
- tmp |= (1 << pin);
- else
- tmp &= ~(1 << pin);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_GPR(port));
+ imx_iomuxv1_set_gpr(port, pin, gpio_mode & GPIO_AF);
/* use as gpio? */
- tmp = __raw_readl(VA_GPIO_BASE + MXC_GIUS(port));
- if (gpio_mode & (GPIO_PF | GPIO_AF))
- tmp &= ~(1 << pin);
- else
- tmp |= (1 << pin);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_GIUS(port));
-
- if (pin < 16) {
- tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR1(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= (ocr << (pin * 2));
- __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR1(port));
-
- tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA1(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA1(port));
-
- tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB1(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB1(port));
- } else {
- pin -= 16;
-
- tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR2(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= (ocr << (pin * 2));
- __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR2(port));
-
- tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA2(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA2(port));
-
- tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB2(port));
- tmp &= ~(3 << (pin * 2));
- tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
- __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB2(port));
- }
+ 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);
}
EXPORT_SYMBOL(mxc_gpio_mode);
@@ -151,6 +190,28 @@ void mxc_gpio_release_multiple_pins(const int *pin_list, int count)
gpio_free(gpio);
p++;
}
-
}
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);
+ else
+#endif
+#ifdef CONFIG_MACH_MX21
+ if (cpu_is_mx21())
+ imx_iomuxv1_baseaddr = MX21_IO_ADDRESS(MX21_GPIO_BASE_ADDR);
+ else
+#endif
+#ifdef CONFIG_MACH_MX27
+ if (cpu_is_mx27())
+ imx_iomuxv1_baseaddr = MX27_IO_ADDRESS(MX27_GPIO_BASE_ADDR);
+ else
+#endif
+ return -ENODEV;
+
+ return 0;
+}
+pure_initcall(imx_iomuxv1_init);
--
1.6.6.2
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