Commit f021b5a1 authored by Uwe Kleine-König's avatar Uwe Kleine-König
Browse files

arm/imx/iomux-v1: make base address a runtime choice 



While at it move register modification to static inlines and
so make the relevant code more readable.

Signed-off-by: default avatarUwe Kleine-König <u.kleine-koenig@pengutronix.de>
parent 5e2e95f5

arch/arm/plat-mxc/include/mach/iomux.h

+0 −1
Original line number Diff line number Diff line
@@ -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))

arch/arm/plat-mxc/iomux-v1.c

+127 −66
Original line number Diff line number Diff line 
/*

 * 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);