diff options
| -rw-r--r-- | arch/arm/plat-iop/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/plat-iop/gpio.c | 48 | ||||
| -rw-r--r-- | drivers/i2c/busses/i2c-iop3xx.c | 16 | ||||
| -rw-r--r-- | include/asm-arm/arch-iop32x/iop321.h | 1 | ||||
| -rw-r--r-- | include/asm-arm/arch-iop33x/iop331.h | 1 | ||||
| -rw-r--r-- | include/asm-arm/hardware/iop3xx.h | 21 |
6 files changed, 81 insertions, 8 deletions
diff --git a/arch/arm/plat-iop/Makefile b/arch/arm/plat-iop/Makefile index d20cdec3a944..23da00b11517 100644 --- a/arch/arm/plat-iop/Makefile +++ b/arch/arm/plat-iop/Makefile @@ -2,7 +2,7 @@ # Makefile for the linux kernel. # -obj-y := i2c.o pci.o setup.o time.o +obj-y := gpio.o i2c.o pci.o setup.o time.o obj-m := obj-n := obj- := diff --git a/arch/arm/plat-iop/gpio.c b/arch/arm/plat-iop/gpio.c new file mode 100644 index 000000000000..eda436083417 --- /dev/null +++ b/arch/arm/plat-iop/gpio.c @@ -0,0 +1,48 @@ +/* + * arch/arm/plat-iop/gpio.c + * GPIO handling for Intel IOP3xx processors. + * + * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org> + * + * 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. + */ + +#include <linux/device.h> +#include <asm/hardware/iop3xx.h> + +void gpio_line_config(int line, int direction) +{ + unsigned long flags; + + local_irq_save(flags); + if (direction == GPIO_IN) { + *IOP3XX_GPOE |= 1 << line; + } else if (direction == GPIO_OUT) { + *IOP3XX_GPOE &= ~(1 << line); + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_config); + +int gpio_line_get(int line) +{ + return !!(*IOP3XX_GPID & (1 << line)); +} +EXPORT_SYMBOL(gpio_line_get); + +void gpio_line_set(int line, int value) +{ + unsigned long flags; + + local_irq_save(flags); + if (value == GPIO_LOW) { + *IOP3XX_GPOD &= ~(1 << line); + } else if (value == GPIO_HIGH) { + *IOP3XX_GPOD |= 1 << line; + } + local_irq_restore(flags); +} +EXPORT_SYMBOL(gpio_line_set); diff --git a/drivers/i2c/busses/i2c-iop3xx.c b/drivers/i2c/busses/i2c-iop3xx.c index 035417f5a003..a2d0cc3a7785 100644 --- a/drivers/i2c/busses/i2c-iop3xx.c +++ b/drivers/i2c/busses/i2c-iop3xx.c @@ -82,14 +82,16 @@ iop3xx_i2c_enable(struct i2c_algo_iop3xx_data *iop3xx_adap) /* * Every time unit enable is asserted, GPOD needs to be cleared - * on IOP32X to avoid data corruption on the bus. + * on IOP3XX to avoid data corruption on the bus. */ -#ifdef CONFIG_ARCH_IOP32X -#define IOP321_GPOD_I2C0 0x00c0 /* clear these bits to enable ch0 */ -#define IOP321_GPOD_I2C1 0x0030 /* clear these bits to enable ch1 */ - - *IOP321_GPOD &= (iop3xx_adap->id == 0) ? ~IOP321_GPOD_I2C0 : - ~IOP321_GPOD_I2C1; +#ifdef CONFIG_PLAT_IOP + if (iop3xx_adap->id == 0) { + gpio_line_set(IOP3XX_GPIO_LINE(7), GPIO_LOW); + gpio_line_set(IOP3XX_GPIO_LINE(6), GPIO_LOW); + } else { + gpio_line_set(IOP3XX_GPIO_LINE(5), GPIO_LOW); + gpio_line_set(IOP3XX_GPIO_LINE(4), GPIO_LOW); + } #endif /* NB SR bits not same position as CR IE bits :-( */ iop3xx_adap->SR_enabled = diff --git a/include/asm-arm/arch-iop32x/iop321.h b/include/asm-arm/arch-iop32x/iop321.h index 34fe07f0a44e..1e57e0094767 100644 --- a/include/asm-arm/arch-iop32x/iop321.h +++ b/include/asm-arm/arch-iop32x/iop321.h @@ -216,6 +216,7 @@ * Peripherals that are shared between the iop32x and iop33x but * located at different addresses. */ +#define IOP3XX_GPIO_REG(reg) (IOP3XX_PERIPHERAL_VIRT_BASE + 0x07c0 + (reg)) #define IOP3XX_TIMER_REG(reg) (IOP3XX_PERIPHERAL_VIRT_BASE + 0x07e0 + (reg)) #include <asm/hardware/iop3xx.h> diff --git a/include/asm-arm/arch-iop33x/iop331.h b/include/asm-arm/arch-iop33x/iop331.h index 4ebcd7197c86..d12a95aa967a 100644 --- a/include/asm-arm/arch-iop33x/iop331.h +++ b/include/asm-arm/arch-iop33x/iop331.h @@ -221,6 +221,7 @@ * Peripherals that are shared between the iop32x and iop33x but * located at different addresses. */ +#define IOP3XX_GPIO_REG(reg) (IOP3XX_PERIPHERAL_VIRT_BASE + 0x1780 + (reg)) #define IOP3XX_TIMER_REG(reg) (IOP3XX_PERIPHERAL_VIRT_BASE + 0x07d0 + (reg)) #include <asm/hardware/iop3xx.h> diff --git a/include/asm-arm/hardware/iop3xx.h b/include/asm-arm/hardware/iop3xx.h index 98b7cbc405e6..f3c61d041fca 100644 --- a/include/asm-arm/hardware/iop3xx.h +++ b/include/asm-arm/hardware/iop3xx.h @@ -16,6 +16,22 @@ #define __IOP3XX_H /* + * IOP3XX GPIO handling + */ +#define GPIO_IN 0 +#define GPIO_OUT 1 +#define GPIO_LOW 0 +#define GPIO_HIGH 1 +#define IOP3XX_GPIO_LINE(x) (x) + +#ifndef __ASSEMBLY__ +extern void gpio_line_config(int line, int direction); +extern int gpio_line_get(int line); +extern void gpio_line_set(int line, int value); +#endif + + +/* * IOP3XX processor registers */ #define IOP3XX_PERIPHERAL_PHYS_BASE 0xffffe000 @@ -81,6 +97,11 @@ #define IOP3XX_PCIXSR (volatile u32 *)IOP3XX_REG_ADDR(0x01e4) #define IOP3XX_PCIIRSR (volatile u32 *)IOP3XX_REG_ADDR(0x01ec) +/* General Purpose I/O */ +#define IOP3XX_GPOE (volatile u32 *)IOP3XX_GPIO_REG(0x0004) +#define IOP3XX_GPID (volatile u32 *)IOP3XX_GPIO_REG(0x0008) +#define IOP3XX_GPOD (volatile u32 *)IOP3XX_GPIO_REG(0x000c) + /* Timers */ #define IOP3XX_TU_TMR0 (volatile u32 *)IOP3XX_TIMER_REG(0x0000) #define IOP3XX_TU_TMR1 (volatile u32 *)IOP3XX_TIMER_REG(0x0004) |