diff options
author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2010-02-15 16:57:09 +0100 |
---|---|---|
committer | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2010-02-24 10:07:09 +0100 |
commit | f021b5a1ef1b229ddc8c5cf3f2c5da308d974a5a (patch) | |
tree | fd494c632b057685ff1f1dc11c905ce0eccdcac3 /arch/arm/plat-mxc | |
parent | 5e2e95f520538e095d10456acd28d9107317aa32 (diff) | |
download | kernel_samsung_tuna-f021b5a1ef1b229ddc8c5cf3f2c5da308d974a5a.zip kernel_samsung_tuna-f021b5a1ef1b229ddc8c5cf3f2c5da308d974a5a.tar.gz kernel_samsung_tuna-f021b5a1ef1b229ddc8c5cf3f2c5da308d974a5a.tar.bz2 |
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: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r-- | arch/arm/plat-mxc/include/mach/iomux.h | 1 | ||||
-rw-r--r-- | 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); |