diff options
Diffstat (limited to 'target/linux/adm5120-2.6/files/arch')
| -rw-r--r-- | target/linux/adm5120-2.6/files/arch/mips/adm5120/gpio.c | 714 |
1 files changed, 714 insertions, 0 deletions
diff --git a/target/linux/adm5120-2.6/files/arch/mips/adm5120/gpio.c b/target/linux/adm5120-2.6/files/arch/mips/adm5120/gpio.c new file mode 100644 index 000000000..3b317e35a --- /dev/null +++ b/target/linux/adm5120-2.6/files/arch/mips/adm5120/gpio.c @@ -0,0 +1,714 @@ +/* + * $Id$ + * + * ADM5120 GPIO support + * + * Copyright (C) 2007 OpenWrt.org + * Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * 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., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/platform_device.h> + +#include <asm/addrspace.h> +#include <asm/io.h> +#include <asm/gpio.h> + +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_info.h> +#include <asm/mach-adm5120/adm5120_switch.h> + +typedef void __iomem * gpio_reg_t; +#define GPIO_READ(r) readl((r)) +#define GPIO_WRITE(v,r) writel((v),(r)) +#define GPIO_REG(r) (gpio_reg_t)(KSEG1ADDR(ADM5120_SWITCH_BASE)+r) + +struct adm5120_gpio_line { + u32 flags; + const char *label; +}; + +#define GPIO_FLAG_VALID 0x01 +#define GPIO_FLAG_USED 0x02 + +struct led_desc { + gpio_reg_t reg; /* LED register address */ + u8 iv_shift; /* shift amount for input bit */ + u8 mode_shift; /* shift amount for mode bits */ +}; + +#define LED_DESC(_port,_led) { \ + .reg = GPIO_REG(SWITCH_REG_PORT0_LED+_port*4), \ + .iv_shift = LED0_IV_SHIFT+_led, \ + .mode_shift = _led*4 \ + } + +static struct led_desc led_table[15] = { + LED_DESC(0, 0), LED_DESC(0, 1), LED_DESC(0, 2), + LED_DESC(1, 0), LED_DESC(1, 1), LED_DESC(1, 2), + LED_DESC(2, 0), LED_DESC(2, 1), LED_DESC(2, 2), + LED_DESC(3, 0), LED_DESC(3, 1), LED_DESC(3, 2), + LED_DESC(4, 0), LED_DESC(4, 1), LED_DESC(4, 2) +}; + +static struct adm5120_gpio_line adm5120_gpio_map[ADM5120_GPIO_COUNT] = { + [ADM5120_GPIO_PIN0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN3] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN4] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN5] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN6] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN7] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L2] = {.flags = GPIO_FLAG_VALID} +}; + +#define gpio_is_invalid(g) ( \ + (g) > ADM5120_GPIO_MAX || \ + ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_VALID) == 0) \ + ) + +#define gpio_is_used(g) ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_USED) != 0) + +/* + * Helpers for GPIO lines in GPIO_CONF0 register + */ +#define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p) +#define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p) +#define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p) +#define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p) + +static inline int pins_direction_input(unsigned pin) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + t &= ~(PIN_OE(pin)); + t |= PIN_IM(pin); + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int pins_direction_output(unsigned pin, int value) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + t &= ~(PIN_IM(pin) | PIN_OV(pin)); + t |= PIN_OE(pin); + + if (value) + t |= PIN_OV(pin); + + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int pins_get_value(unsigned pin) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + if ((t & PIN_IM(pin)) != 0) + t &= PIN_IV(pin); + else + t &= PIN_OV(pin); + + return (t) ? 1 : 0; +} + +static inline void pins_set_value(unsigned pin, int value) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + if (value == 0) + t &= ~(PIN_OV(pin)); + else + t |= PIN_OV(pin); + + GPIO_WRITE(t,reg); +} + +/* + * Helpers for GPIO lines in PORTx_LED registers + */ +static inline int leds_direction_input(unsigned led) +{ + gpio_reg_t *reg; + u32 t; + + reg = led_table[led].reg; + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << led_table[led].mode_shift); + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int leds_direction_output(unsigned led, int value) +{ + gpio_reg_t *reg; + u32 t, s; + + reg = led_table[led].reg; + s = led_table[led].mode_shift; + + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << s); + if (value) + t |= (LED_MODE_OUT_HIGH << s); + else + t |= (LED_MODE_OUT_LOW << s); + + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int leds_get_value(unsigned led) +{ + gpio_reg_t *reg; + u32 t, m; + + reg = led_table[led].reg; + + t = GPIO_READ(reg); + m = (t >> led_table[led].mode_shift) & LED_MODE_MASK; + if (m == LED_MODE_INPUT) + return (t >> led_table[led].iv_shift) & 1; + + if (m == LED_MODE_OUT_LOW) + return 0; + + return 1; +} + +static inline void leds_set_value(unsigned led, int value) +{ + gpio_reg_t *reg; + u32 s,t; + + reg = led_table[led].reg; + s = led_table[led].mode_shift; + + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << s); + if (value) + t |= (LED_MODE_OUT_HIGH << s); + else + t |= (LED_MODE_OUT_LOW << s); + + GPIO_WRITE(t,reg); +} + +/* + * Main GPIO support routines + */ +int adm5120_gpio_direction_input(unsigned gpio) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio < ADM5120_GPIO_P0L0) + return pins_direction_input(gpio); + + gpio -= ADM5120_GPIO_P0L0; + return leds_direction_input(gpio); +} + +int adm5120_gpio_direction_output(unsigned gpio, int value) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio < ADM5120_GPIO_P0L0) + return pins_direction_output(gpio, value); + + gpio -= ADM5120_GPIO_P0L0; + return leds_direction_output(gpio, value); +} + +int adm5120_gpio_get_value(unsigned gpio) +{ + if (gpio < ADM5120_GPIO_P0L0) + return pins_get_value(gpio); + + gpio -= ADM5120_GPIO_P0L0; + return leds_get_value(gpio); +} + +void adm5120_gpio_set_value(unsigned gpio, int value) +{ + if (gpio < ADM5120_GPIO_P0L0) { + pins_set_value(gpio, value); + return; + } + + gpio -= ADM5120_GPIO_P0L0; + leds_set_value(gpio, value); +} + +int adm5120_gpio_request(unsigned gpio, const char *label) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio_is_used(gpio)) + return -EBUSY; + + adm5120_gpio_map[gpio].flags |= GPIO_FLAG_USED; + adm5120_gpio_map[gpio].label = label; + + return 0; +} + +void adm5120_gpio_free(unsigned gpio) +{ + if (gpio_is_invalid(gpio)) + return; + + adm5120_gpio_map[gpio].flags &= ~GPIO_FLAG_USED; + adm5120_gpio_map[gpio].label = NULL; +} + +int adm5120_gpio_to_irq(unsigned gpio) +{ + /* FIXME: not yet implemented */ + return -EINVAL; +} + +int adm5120_irq_to_gpio(unsigned irq) +{ + /* FIXME: not yet implemented */ + return -EINVAL; +} + +static int __init adm5120_gpio_init(void) +{ + int i; + + if (adm5120_package_pqfp()) { + /* GPIO pins 4-7 are unavailable in ADM5120P */ + for (i=ADM5120_GPIO_PIN4; i<=ADM5120_GPIO_PIN7; i++) + adm5120_gpio_map[i].flags &= ~GPIO_FLAG_VALID; + } + + return 0; +} + +subsys_initcall(adm5120_gpio_init); + +EXPORT_SYMBOL(adm5120_gpio_direction_output); +EXPORT_SYMBOL(adm5120_gpio_direction_input); +EXPORT_SYMBOL(adm5120_gpio_get_value); +EXPORT_SYMBOL(adm5120_gpio_set_value); +EXPORT_SYMBOL(adm5120_gpio_request); +EXPORT_SYMBOL(adm5120_gpio_free); +EXPORT_SYMBOL(adm5120_gpio_to_irq); +EXPORT_SYMBOL(adm5120_irq_to_gpio); +/* + * $Id$ + * + * ADM5120 GPIO support + * + * Copyright (C) 2007 OpenWrt.org + * Copyright (C) 2007 Gabor Juhos <juhosg@freemail.hu> + * + * 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. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * 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., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + +#include <linux/autoconf.h> +#include <linux/init.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/delay.h> +#include <linux/platform_device.h> + +#include <asm/addrspace.h> +#include <asm/io.h> +#include <asm/gpio.h> + +#include <asm/mach-adm5120/adm5120_defs.h> +#include <asm/mach-adm5120/adm5120_info.h> +#include <asm/mach-adm5120/adm5120_switch.h> + +typedef void __iomem * gpio_reg_t; +#define GPIO_READ(r) readl((r)) +#define GPIO_WRITE(v,r) writel((v),(r)) +#define GPIO_REG(r) (gpio_reg_t)(KSEG1ADDR(ADM5120_SWITCH_BASE)+r) + +struct adm5120_gpio_line { + u32 flags; + const char *label; +}; + +#define GPIO_FLAG_VALID 0x01 +#define GPIO_FLAG_USED 0x02 + +struct led_desc { + gpio_reg_t reg; /* LED register address */ + u8 iv_shift; /* shift amount for input bit */ + u8 mode_shift; /* shift amount for mode bits */ +}; + +#define LED_DESC(_port,_led) { \ + .reg = GPIO_REG(SWITCH_REG_PORT0_LED+_port*4), \ + .iv_shift = LED0_IV_SHIFT+_led, \ + .mode_shift = _led*4 \ + } + +static struct led_desc led_table[15] = { + LED_DESC(0, 0), LED_DESC(0, 1), LED_DESC(0, 2), + LED_DESC(1, 0), LED_DESC(1, 1), LED_DESC(1, 2), + LED_DESC(2, 0), LED_DESC(2, 1), LED_DESC(2, 2), + LED_DESC(3, 0), LED_DESC(3, 1), LED_DESC(3, 2), + LED_DESC(4, 0), LED_DESC(4, 1), LED_DESC(4, 2) +}; + +static struct adm5120_gpio_line adm5120_gpio_map[ADM5120_GPIO_COUNT] = { + [ADM5120_GPIO_PIN0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN3] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN4] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN5] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN6] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_PIN7] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P0L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P1L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P2L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P3L2] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L0] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L1] = {.flags = GPIO_FLAG_VALID}, + [ADM5120_GPIO_P4L2] = {.flags = GPIO_FLAG_VALID} +}; + +#define gpio_is_invalid(g) ( \ + (g) > ADM5120_GPIO_MAX || \ + ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_VALID) == 0) \ + ) + +#define gpio_is_used(g) ((adm5120_gpio_map[(g)].flags & GPIO_FLAG_USED) != 0) + +/* + * Helpers for GPIO lines in GPIO_CONF0 register + */ +#define PIN_IM(p) ((1 << GPIO_CONF0_IM_SHIFT) << p) +#define PIN_IV(p) ((1 << GPIO_CONF0_IV_SHIFT) << p) +#define PIN_OE(p) ((1 << GPIO_CONF0_OE_SHIFT) << p) +#define PIN_OV(p) ((1 << GPIO_CONF0_OV_SHIFT) << p) + +static inline int pins_direction_input(unsigned pin) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + t &= ~(PIN_OE(pin)); + t |= PIN_IM(pin); + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int pins_direction_output(unsigned pin, int value) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + t &= ~(PIN_IM(pin) | PIN_OV(pin)); + t |= PIN_OE(pin); + + if (value) + t |= PIN_OV(pin); + + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int pins_get_value(unsigned pin) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + if ((t & PIN_IM(pin)) != 0) + t &= PIN_IV(pin); + else + t &= PIN_OV(pin); + + return (t) ? 1 : 0; +} + +static inline void pins_set_value(unsigned pin, int value) +{ + gpio_reg_t *reg; + u32 t; + + reg = GPIO_REG(SWITCH_REG_GPIO_CONF0); + + t = GPIO_READ(reg); + if (value == 0) + t &= ~(PIN_OV(pin)); + else + t |= PIN_OV(pin); + + GPIO_WRITE(t,reg); +} + +/* + * Helpers for GPIO lines in PORTx_LED registers + */ +static inline int leds_direction_input(unsigned led) +{ + gpio_reg_t *reg; + u32 t; + + reg = led_table[led].reg; + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << led_table[led].mode_shift); + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int leds_direction_output(unsigned led, int value) +{ + gpio_reg_t *reg; + u32 t, s; + + reg = led_table[led].reg; + s = led_table[led].mode_shift; + + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << s); + if (value) + t |= (LED_MODE_OUT_HIGH << s); + else + t |= (LED_MODE_OUT_LOW << s); + + GPIO_WRITE(t,reg); + + return 0; +} + +static inline int leds_get_value(unsigned led) +{ + gpio_reg_t *reg; + u32 t, m; + + reg = led_table[led].reg; + + t = GPIO_READ(reg); + m = (t >> led_table[led].mode_shift) & LED_MODE_MASK; + if (m == LED_MODE_INPUT) + return (t >> led_table[led].iv_shift) & 1; + + if (m == LED_MODE_OUT_LOW) + return 0; + + return 1; +} + +static inline void leds_set_value(unsigned led, int value) +{ + gpio_reg_t *reg; + u32 s,t; + + reg = led_table[led].reg; + s = led_table[led].mode_shift; + + t = GPIO_READ(reg); + t &= ~(LED_MODE_MASK << s); + if (value) + t |= (LED_MODE_OUT_HIGH << s); + else + t |= (LED_MODE_OUT_LOW << s); + + GPIO_WRITE(t,reg); +} + +/* + * Main GPIO support routines + */ +int adm5120_gpio_direction_input(unsigned gpio) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio < ADM5120_GPIO_P0L0) + return pins_direction_input(gpio); + + gpio -= ADM5120_GPIO_P0L0; + return leds_direction_input(gpio); +} + +int adm5120_gpio_direction_output(unsigned gpio, int value) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio < ADM5120_GPIO_P0L0) + return pins_direction_output(gpio, value); + + gpio -= ADM5120_GPIO_P0L0; + return leds_direction_output(gpio, value); +} + +int adm5120_gpio_get_value(unsigned gpio) +{ + if (gpio < ADM5120_GPIO_P0L0) + return pins_get_value(gpio); + + gpio -= ADM5120_GPIO_P0L0; + return leds_get_value(gpio); +} + +void adm5120_gpio_set_value(unsigned gpio, int value) +{ + if (gpio < ADM5120_GPIO_P0L0) { + pins_set_value(gpio, value); + return; + } + + gpio -= ADM5120_GPIO_P0L0; + leds_set_value(gpio, value); +} + +int adm5120_gpio_request(unsigned gpio, const char *label) +{ + if (gpio_is_invalid(gpio)) + return -EINVAL; + + if (gpio_is_used(gpio)) + return -EBUSY; + + adm5120_gpio_map[gpio].flags |= GPIO_FLAG_USED; + adm5120_gpio_map[gpio].label = label; + + return 0; +} + +void adm5120_gpio_free(unsigned gpio) +{ + if (gpio_is_invalid(gpio)) + return; + + adm5120_gpio_map[gpio].flags &= ~GPIO_FLAG_USED; + adm5120_gpio_map[gpio].label = NULL; +} + +int adm5120_gpio_to_irq(unsigned gpio) +{ + /* FIXME: not yet implemented */ + return -EINVAL; +} + +int adm5120_irq_to_gpio(unsigned irq) +{ + /* FIXME: not yet implemented */ + return -EINVAL; +} + +static int __init adm5120_gpio_init(void) +{ + int i; + + if (adm5120_package_pqfp()) { + /* GPIO pins 4-7 are unavailable in ADM5120P */ + for (i=ADM5120_GPIO_PIN4; i<=ADM5120_GPIO_PIN7; i++) + adm5120_gpio_map[i].flags &= ~GPIO_FLAG_VALID; + } + + return 0; +} + +subsys_initcall(adm5120_gpio_init); + +EXPORT_SYMBOL(adm5120_gpio_direction_output); +EXPORT_SYMBOL(adm5120_gpio_direction_input); +EXPORT_SYMBOL(adm5120_gpio_get_value); +EXPORT_SYMBOL(adm5120_gpio_set_value); +EXPORT_SYMBOL(adm5120_gpio_request); +EXPORT_SYMBOL(adm5120_gpio_free); +EXPORT_SYMBOL(adm5120_gpio_to_irq); +EXPORT_SYMBOL(adm5120_irq_to_gpio); |