diff options
Diffstat (limited to 'arch/blackfin/mach-bf538')
| -rw-r--r-- | arch/blackfin/mach-bf538/Makefile | 1 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf538/ext-gpio.c | 123 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf538/include/mach/defBF539.h | 42 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf538/include/mach/gpio.h | 7 | ||||
| -rw-r--r-- | arch/blackfin/mach-bf538/include/mach/portmux.h | 2 |
5 files changed, 148 insertions, 27 deletions
diff --git a/arch/blackfin/mach-bf538/Makefile b/arch/blackfin/mach-bf538/Makefile index 8cd2719684db..c0be54f2cd2b 100644 --- a/arch/blackfin/mach-bf538/Makefile +++ b/arch/blackfin/mach-bf538/Makefile @@ -3,3 +3,4 @@ # obj-y := ints-priority.o dma.o +obj-$(CONFIG_GPIOLIB) += ext-gpio.o diff --git a/arch/blackfin/mach-bf538/ext-gpio.c b/arch/blackfin/mach-bf538/ext-gpio.c new file mode 100644 index 000000000000..180b1252679f --- /dev/null +++ b/arch/blackfin/mach-bf538/ext-gpio.c @@ -0,0 +1,123 @@ +/* + * GPIOLIB interface for BF538/9 PORT C, D, and E GPIOs + * + * Copyright 2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <linux/module.h> +#include <linux/err.h> +#include <asm/blackfin.h> +#include <asm/gpio.h> +#include <asm/portmux.h> + +#define DEFINE_REG(reg, off) \ +static inline u16 read_##reg(void __iomem *port) \ + { return bfin_read16(port + off); } \ +static inline void write_##reg(void __iomem *port, u16 v) \ + { bfin_write16(port + off, v); } + +DEFINE_REG(PORTIO, 0x00) +DEFINE_REG(PORTIO_CLEAR, 0x10) +DEFINE_REG(PORTIO_SET, 0x20) +DEFINE_REG(PORTIO_DIR, 0x40) +DEFINE_REG(PORTIO_INEN, 0x50) + +static void __iomem *gpio_chip_to_mmr(struct gpio_chip *chip) +{ + switch (chip->base) { + default: /* not really needed, but keeps gcc happy */ + case GPIO_PC0: return (void __iomem *)PORTCIO; + case GPIO_PD0: return (void __iomem *)PORTDIO; + case GPIO_PE0: return (void __iomem *)PORTEIO; + } +} + +static int bf538_gpio_get_value(struct gpio_chip *chip, unsigned gpio) +{ + void __iomem *port = gpio_chip_to_mmr(chip); + return !!(read_PORTIO(port) & (1u << gpio)); +} + +static void bf538_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value) +{ + void __iomem *port = gpio_chip_to_mmr(chip); + if (value) + write_PORTIO_SET(port, (1u << gpio)); + else + write_PORTIO_CLEAR(port, (1u << gpio)); +} + +static int bf538_gpio_direction_input(struct gpio_chip *chip, unsigned gpio) +{ + void __iomem *port = gpio_chip_to_mmr(chip); + write_PORTIO_DIR(port, read_PORTIO_DIR(port) & ~(1u << gpio)); + write_PORTIO_INEN(port, read_PORTIO_INEN(port) | (1u << gpio)); + return 0; +} + +static int bf538_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int value) +{ + void __iomem *port = gpio_chip_to_mmr(chip); + write_PORTIO_INEN(port, read_PORTIO_INEN(port) & ~(1u << gpio)); + bf538_gpio_set_value(port, gpio, value); + write_PORTIO_DIR(port, read_PORTIO_DIR(port) | (1u << gpio)); + return 0; +} + +static int bf538_gpio_request(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_special_gpio_request(chip->base + gpio, chip->label); +} + +static void bf538_gpio_free(struct gpio_chip *chip, unsigned gpio) +{ + return bfin_special_gpio_free(chip->base + gpio); +} + +/* We don't set the irq fields as these banks cannot generate interrupts */ + +static struct gpio_chip bf538_portc_chip = { + .label = "GPIO-PC", + .direction_input = bf538_gpio_direction_input, + .get = bf538_gpio_get_value, + .direction_output = bf538_gpio_direction_output, + .set = bf538_gpio_set_value, + .request = bf538_gpio_request, + .free = bf538_gpio_free, + .base = GPIO_PC0, + .ngpio = GPIO_PC9 - GPIO_PC0 + 1, +}; + +static struct gpio_chip bf538_portd_chip = { + .label = "GPIO-PD", + .direction_input = bf538_gpio_direction_input, + .get = bf538_gpio_get_value, + .direction_output = bf538_gpio_direction_output, + .set = bf538_gpio_set_value, + .request = bf538_gpio_request, + .free = bf538_gpio_free, + .base = GPIO_PD0, + .ngpio = GPIO_PD13 - GPIO_PD0 + 1, +}; + +static struct gpio_chip bf538_porte_chip = { + .label = "GPIO-PE", + .direction_input = bf538_gpio_direction_input, + .get = bf538_gpio_get_value, + .direction_output = bf538_gpio_direction_output, + .set = bf538_gpio_set_value, + .request = bf538_gpio_request, + .free = bf538_gpio_free, + .base = GPIO_PE0, + .ngpio = GPIO_PE15 - GPIO_PE0 + 1, +}; + +static int __init bf538_extgpio_setup(void) +{ + return gpiochip_add(&bf538_portc_chip) | + gpiochip_add(&bf538_portd_chip) | + gpiochip_add(&bf538_porte_chip); +} +arch_initcall(bf538_extgpio_setup); diff --git a/arch/blackfin/mach-bf538/include/mach/defBF539.h b/arch/blackfin/mach-bf538/include/mach/defBF539.h index 5f6c34dfd08e..1f1aeabc8c89 100644 --- a/arch/blackfin/mach-bf538/include/mach/defBF539.h +++ b/arch/blackfin/mach-bf538/include/mach/defBF539.h @@ -468,31 +468,31 @@ /* General-Purpose Ports (0xFFC01500 - 0xFFC015FF) */ /* GPIO Port C Register Names */ -#define GPIO_C_CNFG 0xFFC01500 /* GPIO Pin Port C Configuration Register */ -#define GPIO_C_D 0xFFC01510 /* GPIO Pin Port C Data Register */ -#define GPIO_C_C 0xFFC01520 /* Clear GPIO Pin Port C Register */ -#define GPIO_C_S 0xFFC01530 /* Set GPIO Pin Port C Register */ -#define GPIO_C_T 0xFFC01540 /* Toggle GPIO Pin Port C Register */ -#define GPIO_C_DIR 0xFFC01550 /* GPIO Pin Port C Direction Register */ -#define GPIO_C_INEN 0xFFC01560 /* GPIO Pin Port C Input Enable Register */ +#define PORTCIO_FER 0xFFC01500 /* GPIO Pin Port C Configuration Register */ +#define PORTCIO 0xFFC01510 /* GPIO Pin Port C Data Register */ +#define PORTCIO_CLEAR 0xFFC01520 /* Clear GPIO Pin Port C Register */ +#define PORTCIO_SET 0xFFC01530 /* Set GPIO Pin Port C Register */ +#define PORTCIO_TOGGLE 0xFFC01540 /* Toggle GPIO Pin Port C Register */ +#define PORTCIO_DIR 0xFFC01550 /* GPIO Pin Port C Direction Register */ +#define PORTCIO_INEN 0xFFC01560 /* GPIO Pin Port C Input Enable Register */ /* GPIO Port D Register Names */ -#define GPIO_D_CNFG 0xFFC01504 /* GPIO Pin Port D Configuration Register */ -#define GPIO_D_D 0xFFC01514 /* GPIO Pin Port D Data Register */ -#define GPIO_D_C 0xFFC01524 /* Clear GPIO Pin Port D Register */ -#define GPIO_D_S 0xFFC01534 /* Set GPIO Pin Port D Register */ -#define GPIO_D_T 0xFFC01544 /* Toggle GPIO Pin Port D Register */ -#define GPIO_D_DIR 0xFFC01554 /* GPIO Pin Port D Direction Register */ -#define GPIO_D_INEN 0xFFC01564 /* GPIO Pin Port D Input Enable Register */ +#define PORTDIO_FER 0xFFC01504 /* GPIO Pin Port D Configuration Register */ +#define PORTDIO 0xFFC01514 /* GPIO Pin Port D Data Register */ +#define PORTDIO_CLEAR 0xFFC01524 /* Clear GPIO Pin Port D Register */ +#define PORTDIO_SET 0xFFC01534 /* Set GPIO Pin Port D Register */ +#define PORTDIO_TOGGLE 0xFFC01544 /* Toggle GPIO Pin Port D Register */ +#define PORTDIO_DIR 0xFFC01554 /* GPIO Pin Port D Direction Register */ +#define PORTDIO_INEN 0xFFC01564 /* GPIO Pin Port D Input Enable Register */ /* GPIO Port E Register Names */ -#define GPIO_E_CNFG 0xFFC01508 /* GPIO Pin Port E Configuration Register */ -#define GPIO_E_D 0xFFC01518 /* GPIO Pin Port E Data Register */ -#define GPIO_E_C 0xFFC01528 /* Clear GPIO Pin Port E Register */ -#define GPIO_E_S 0xFFC01538 /* Set GPIO Pin Port E Register */ -#define GPIO_E_T 0xFFC01548 /* Toggle GPIO Pin Port E Register */ -#define GPIO_E_DIR 0xFFC01558 /* GPIO Pin Port E Direction Register */ -#define GPIO_E_INEN 0xFFC01568 /* GPIO Pin Port E Input Enable Register */ +#define PORTEIO_FER 0xFFC01508 /* GPIO Pin Port E Configuration Register */ +#define PORTEIO 0xFFC01518 /* GPIO Pin Port E Data Register */ +#define PORTEIO_CLEAR 0xFFC01528 /* Clear GPIO Pin Port E Register */ +#define PORTEIO_SET 0xFFC01538 /* Set GPIO Pin Port E Register */ +#define PORTEIO_TOGGLE 0xFFC01548 /* Toggle GPIO Pin Port E Register */ +#define PORTEIO_DIR 0xFFC01558 /* GPIO Pin Port E Direction Register */ +#define PORTEIO_INEN 0xFFC01568 /* GPIO Pin Port E Input Enable Register */ /* DMA Controller 1 Traffic Control Registers (0xFFC01B00 - 0xFFC01BFF) */ diff --git a/arch/blackfin/mach-bf538/include/mach/gpio.h b/arch/blackfin/mach-bf538/include/mach/gpio.h index 295c78a465c2..0c346fba9619 100644 --- a/arch/blackfin/mach-bf538/include/mach/gpio.h +++ b/arch/blackfin/mach-bf538/include/mach/gpio.h @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008 Analog Devices Inc. + * Copyright (C) 2008-2009 Analog Devices Inc. * Licensed under the GPL-2 or later. */ @@ -7,11 +7,8 @@ #ifndef _MACH_GPIO_H_ #define _MACH_GPIO_H_ - /* FIXME: - * For now only support PORTF GPIOs. - * PORT C,D and E are for peripheral usage only - */ #define MAX_BLACKFIN_GPIOS 16 +#define BFIN_SPECIAL_GPIO_BANKS 3 #define GPIO_PF0 0 /* PF */ #define GPIO_PF1 1 diff --git a/arch/blackfin/mach-bf538/include/mach/portmux.h b/arch/blackfin/mach-bf538/include/mach/portmux.h index 6121cf8b5872..0083ba13ee9e 100644 --- a/arch/blackfin/mach-bf538/include/mach/portmux.h +++ b/arch/blackfin/mach-bf538/include/mach/portmux.h @@ -7,7 +7,7 @@ #ifndef _MACH_PORTMUX_H_ #define _MACH_PORTMUX_H_ -#define MAX_RESOURCES MAX_BLACKFIN_GPIOS +#define MAX_RESOURCES 64 #define P_TMR2 (P_DONTCARE) #define P_TMR1 (P_DONTCARE) |
