Add ADM5120 GPIO wrappers

SVN-Revision: 7288

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 (file)
index 0000000..3b317e3
--- /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);

diff --git a/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/gpio.h b/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/gpio.h
new file mode 100644 (file)
index 0000000..e0f72c9
--- /dev/null
+++ b/target/linux/adm5120-2.6/files/include/asm-mips/mach-adm5120/gpio.h
@@ -0,0 +1,218 @@
+/*
+ *  $Id$
+ *
+ *  ADM5120 GPIO wrappers for arch-neutral GPIO calls
+ *
+ *  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.
+ *
+ */
+
+#ifndef _ADM5120_GPIO_H_
+#define _ADM5120_GPIO_H_
+
+#define ADM5120_GPIO_PIN0      0
+#define ADM5120_GPIO_PIN1      1
+#define ADM5120_GPIO_PIN2      2
+#define ADM5120_GPIO_PIN3      3
+#define ADM5120_GPIO_PIN4      4
+#define ADM5120_GPIO_PIN5      5
+#define ADM5120_GPIO_PIN6      6
+#define ADM5120_GPIO_PIN7      7
+#define ADM5120_GPIO_P0L0      8
+#define ADM5120_GPIO_P0L1      9
+#define ADM5120_GPIO_P0L2      10
+#define ADM5120_GPIO_P1L0      11
+#define ADM5120_GPIO_P1L1      12
+#define ADM5120_GPIO_P1L2      13
+#define ADM5120_GPIO_P2L0      14
+#define ADM5120_GPIO_P2L1      15
+#define ADM5120_GPIO_P2L2      16
+#define ADM5120_GPIO_P3L0      17
+#define ADM5120_GPIO_P3L1      18
+#define ADM5120_GPIO_P3L2      19
+#define ADM5120_GPIO_P4L0      20
+#define ADM5120_GPIO_P4L1      21
+#define ADM5120_GPIO_P4L2      22
+#define ADM5120_GPIO_MAX       22
+#define ADM5120_GPIO_COUNT     ADM5120_GPIO_MAX+1
+
+extern int adm5120_gpio_direction_input(unsigned gpio);
+extern int adm5120_gpio_direction_output(unsigned gpio, int value);
+extern int adm5120_gpio_get_value(unsigned gpio);
+extern void adm5120_gpio_set_value(unsigned gpio, int value);
+extern int adm5120_gpio_request(unsigned gpio, const char *label);
+extern void adm5120_gpio_free(unsigned gpio);
+extern int adm5120_gpio_to_irq(unsigned gpio);
+extern int adm5120_irq_to_gpio(unsigned irq);
+
+/*
+ * Wrappers for the generic GPIO layer
+ */
+static inline int gpio_direction_input(unsigned gpio)
+{
+       return adm5120_gpio_direction_input(gpio);
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+       return adm5120_gpio_direction_output(gpio,value);
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+       return adm5120_gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+       adm5120_gpio_set_value(gpio, value);
+}
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+       return adm5120_gpio_request(gpio, label);
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+       adm5120_gpio_free(gpio);
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+       return adm5120_gpio_to_irq(gpio);
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+       return adm5120_irq_to_gpio(irq);
+}
+
+#include <asm-generic/gpio.h> /* cansleep wrappers */
+
+#endif /* _ADM5120_GPIO_H_ */
+/*
+ *  $Id$
+ *
+ *  ADM5120 GPIO wrappers for arch-neutral GPIO calls
+ *
+ *  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.
+ *
+ */
+
+#ifndef _ADM5120_GPIO_H_
+#define _ADM5120_GPIO_H_
+
+#define ADM5120_GPIO_PIN0      0
+#define ADM5120_GPIO_PIN1      1
+#define ADM5120_GPIO_PIN2      2
+#define ADM5120_GPIO_PIN3      3
+#define ADM5120_GPIO_PIN4      4
+#define ADM5120_GPIO_PIN5      5
+#define ADM5120_GPIO_PIN6      6
+#define ADM5120_GPIO_PIN7      7
+#define ADM5120_GPIO_P0L0      8
+#define ADM5120_GPIO_P0L1      9
+#define ADM5120_GPIO_P0L2      10
+#define ADM5120_GPIO_P1L0      11
+#define ADM5120_GPIO_P1L1      12
+#define ADM5120_GPIO_P1L2      13
+#define ADM5120_GPIO_P2L0      14
+#define ADM5120_GPIO_P2L1      15
+#define ADM5120_GPIO_P2L2      16
+#define ADM5120_GPIO_P3L0      17
+#define ADM5120_GPIO_P3L1      18
+#define ADM5120_GPIO_P3L2      19
+#define ADM5120_GPIO_P4L0      20
+#define ADM5120_GPIO_P4L1      21
+#define ADM5120_GPIO_P4L2      22
+#define ADM5120_GPIO_MAX       22
+#define ADM5120_GPIO_COUNT     ADM5120_GPIO_MAX+1
+
+extern int adm5120_gpio_direction_input(unsigned gpio);
+extern int adm5120_gpio_direction_output(unsigned gpio, int value);
+extern int adm5120_gpio_get_value(unsigned gpio);
+extern void adm5120_gpio_set_value(unsigned gpio, int value);
+extern int adm5120_gpio_request(unsigned gpio, const char *label);
+extern void adm5120_gpio_free(unsigned gpio);
+extern int adm5120_gpio_to_irq(unsigned gpio);
+extern int adm5120_irq_to_gpio(unsigned irq);
+
+/*
+ * Wrappers for the generic GPIO layer
+ */
+static inline int gpio_direction_input(unsigned gpio)
+{
+       return adm5120_gpio_direction_input(gpio);
+}
+
+static inline int gpio_direction_output(unsigned gpio, int value)
+{
+       return adm5120_gpio_direction_output(gpio,value);
+}
+
+static inline int gpio_get_value(unsigned gpio)
+{
+       return adm5120_gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+       adm5120_gpio_set_value(gpio, value);
+}
+
+static inline int gpio_request(unsigned gpio, const char *label)
+{
+       return adm5120_gpio_request(gpio, label);
+}
+
+static inline void gpio_free(unsigned gpio)
+{
+       adm5120_gpio_free(gpio);
+}
+
+static inline int gpio_to_irq(unsigned gpio)
+{
+       return adm5120_gpio_to_irq(gpio);
+}
+
+static inline int irq_to_gpio(unsigned irq)
+{
+       return adm5120_irq_to_gpio(irq);
+}
+
+#include <asm-generic/gpio.h> /* cansleep wrappers */
+
+#endif /* _ADM5120_GPIO_H_ */