bool "ST 8815 Nomadik Hardware Kit (evaluation board)"
select NOMADIK_8815
select HAS_MTU
+ select NOMADIK_GPIO
endmenu
# Object file lists.
-obj-y += clock.o gpio.o
+obj-y += clock.o
# Cpu revision
obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o
+++ /dev/null
-/*
- * Generic GPIO driver for logic cells found in the Nomadik SoC
- *
- * Copyright (C) 2008,2009 STMicroelectronics
- * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
- * Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/amba/bus.h>
-#include <linux/io.h>
-#include <linux/gpio.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-
-#include <mach/hardware.h>
-#include <mach/gpio.h>
-
-/*
- * The GPIO module in the Nomadik family of Systems-on-Chip is an
- * AMBA device, managing 32 pins and alternate functions. The logic block
- * is currently only used in the Nomadik.
- *
- * Symbols in this file are called "nmk_gpio" for "nomadik gpio"
- */
-
-#define NMK_GPIO_PER_CHIP 32
-struct nmk_gpio_chip {
- struct gpio_chip chip;
- void __iomem *addr;
- unsigned int parent_irq;
- spinlock_t *lock;
- /* Keep track of configured edges */
- u32 edge_rising;
- u32 edge_falling;
-};
-
-/* Mode functions */
-int nmk_gpio_set_mode(int gpio, int gpio_mode)
-{
- struct nmk_gpio_chip *nmk_chip;
- unsigned long flags;
- u32 afunc, bfunc, bit;
-
- nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
- if (!nmk_chip)
- return -EINVAL;
-
- bit = 1 << (gpio - nmk_chip->chip.base);
-
- spin_lock_irqsave(&nmk_chip->lock, flags);
- afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit;
- bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit;
- if (gpio_mode & NMK_GPIO_ALT_A)
- afunc |= bit;
- if (gpio_mode & NMK_GPIO_ALT_B)
- bfunc |= bit;
- writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
- writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
- spin_unlock_irqrestore(&nmk_chip->lock, flags);
-
- return 0;
-}
-EXPORT_SYMBOL(nmk_gpio_set_mode);
-
-int nmk_gpio_get_mode(int gpio)
-{
- struct nmk_gpio_chip *nmk_chip;
- u32 afunc, bfunc, bit;
-
- nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
- if (!nmk_chip)
- return -EINVAL;
-
- bit = 1 << (gpio - nmk_chip->chip.base);
-
- afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit;
- bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit;
-
- return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
-}
-EXPORT_SYMBOL(nmk_gpio_get_mode);
-
-
-/* IRQ functions */
-static inline int nmk_gpio_get_bitmask(int gpio)
-{
- return 1 << (gpio % 32);
-}
-
-static void nmk_gpio_irq_ack(unsigned int irq)
-{
- int gpio;
- struct nmk_gpio_chip *nmk_chip;
-
- gpio = NOMADIK_IRQ_TO_GPIO(irq);
- nmk_chip = get_irq_chip_data(irq);
- if (!nmk_chip)
- return;
- writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC);
-}
-
-static void nmk_gpio_irq_mask(unsigned int irq)
-{
- int gpio;
- struct nmk_gpio_chip *nmk_chip;
- unsigned long flags;
- u32 bitmask, reg;
-
- gpio = NOMADIK_IRQ_TO_GPIO(irq);
- nmk_chip = get_irq_chip_data(irq);
- bitmask = nmk_gpio_get_bitmask(gpio);
- if (!nmk_chip)
- return;
-
- /* we must individually clear the two edges */
- spin_lock_irqsave(&nmk_chip->lock, flags);
- if (nmk_chip->edge_rising & bitmask) {
- reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
- reg &= ~bitmask;
- writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
- }
- if (nmk_chip->edge_falling & bitmask) {
- reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
- reg &= ~bitmask;
- writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
- }
- spin_unlock_irqrestore(&nmk_chip->lock, flags);
-};
-
-static void nmk_gpio_irq_unmask(unsigned int irq)
-{
- int gpio;
- struct nmk_gpio_chip *nmk_chip;
- unsigned long flags;
- u32 bitmask, reg;
-
- gpio = NOMADIK_IRQ_TO_GPIO(irq);
- nmk_chip = get_irq_chip_data(irq);
- bitmask = nmk_gpio_get_bitmask(gpio);
- if (!nmk_chip)
- return;
-
- /* we must individually set the two edges */
- spin_lock_irqsave(&nmk_chip->lock, flags);
- if (nmk_chip->edge_rising & bitmask) {
- reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
- reg |= bitmask;
- writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
- }
- if (nmk_chip->edge_falling & bitmask) {
- reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
- reg |= bitmask;
- writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
- }
- spin_unlock_irqrestore(&nmk_chip->lock, flags);
-}
-
-static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type)
-{
- int gpio;
- struct nmk_gpio_chip *nmk_chip;
- unsigned long flags;
- u32 bitmask;
-
- gpio = NOMADIK_IRQ_TO_GPIO(irq);
- nmk_chip = get_irq_chip_data(irq);
- bitmask = nmk_gpio_get_bitmask(gpio);
- if (!nmk_chip)
- return -EINVAL;
-
- if (type & IRQ_TYPE_LEVEL_HIGH)
- return -EINVAL;
- if (type & IRQ_TYPE_LEVEL_LOW)
- return -EINVAL;
-
- spin_lock_irqsave(&nmk_chip->lock, flags);
-
- nmk_chip->edge_rising &= ~bitmask;
- if (type & IRQ_TYPE_EDGE_RISING)
- nmk_chip->edge_rising |= bitmask;
- writel(nmk_chip->edge_rising, nmk_chip->addr + NMK_GPIO_RIMSC);
-
- nmk_chip->edge_falling &= ~bitmask;
- if (type & IRQ_TYPE_EDGE_FALLING)
- nmk_chip->edge_falling |= bitmask;
- writel(nmk_chip->edge_falling, nmk_chip->addr + NMK_GPIO_FIMSC);
-
- spin_unlock_irqrestore(&nmk_chip->lock, flags);
-
- nmk_gpio_irq_unmask(irq);
-
- return 0;
-}
-
-static struct irq_chip nmk_gpio_irq_chip = {
- .name = "Nomadik-GPIO",
- .ack = nmk_gpio_irq_ack,
- .mask = nmk_gpio_irq_mask,
- .unmask = nmk_gpio_irq_unmask,
- .set_type = nmk_gpio_irq_set_type,
-};
-
-static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- struct nmk_gpio_chip *nmk_chip;
- struct irq_chip *host_chip;
- unsigned int gpio_irq;
- u32 pending;
- unsigned int first_irq;
-
- nmk_chip = get_irq_data(irq);
- first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
- while ( (pending = readl(nmk_chip->addr + NMK_GPIO_IS)) ) {
- gpio_irq = first_irq + __ffs(pending);
- generic_handle_irq(gpio_irq);
- }
- if (0) {/* don't ack parent irq, as ack == disable */
- host_chip = get_irq_chip(irq);
- host_chip->ack(irq);
- }
-}
-
-static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
-{
- unsigned int first_irq;
- int i;
-
- first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
- for (i = first_irq; i < first_irq + NMK_GPIO_PER_CHIP; i++) {
- set_irq_chip(i, &nmk_gpio_irq_chip);
- set_irq_handler(i, handle_edge_irq);
- set_irq_flags(i, IRQF_VALID);
- set_irq_chip_data(i, nmk_chip);
- }
- set_irq_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
- set_irq_data(nmk_chip->parent_irq, nmk_chip);
- return 0;
-}
-
-/* I/O Functions */
-static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
-{
- struct nmk_gpio_chip *nmk_chip =
- container_of(chip, struct nmk_gpio_chip, chip);
-
- writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
- return 0;
-}
-
-static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
- int val)
-{
- struct nmk_gpio_chip *nmk_chip =
- container_of(chip, struct nmk_gpio_chip, chip);
-
- writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
- return 0;
-}
-
-static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
-{
- struct nmk_gpio_chip *nmk_chip =
- container_of(chip, struct nmk_gpio_chip, chip);
- u32 bit = 1 << offset;
-
- return (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0;
-}
-
-static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
- int val)
-{
- struct nmk_gpio_chip *nmk_chip =
- container_of(chip, struct nmk_gpio_chip, chip);
- u32 bit = 1 << offset;
-
- if (val)
- writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
- else
- writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
-}
-
-/* This structure is replicated for each GPIO block allocated at probe time */
-static struct gpio_chip nmk_gpio_template = {
- .direction_input = nmk_gpio_make_input,
- .get = nmk_gpio_get_input,
- .direction_output = nmk_gpio_make_output,
- .set = nmk_gpio_set_output,
- .ngpio = NMK_GPIO_PER_CHIP,
- .can_sleep = 0,
-};
-
-static int __init nmk_gpio_probe(struct amba_device *dev, struct amba_id *id)
-{
- struct nmk_gpio_platform_data *pdata;
- struct nmk_gpio_chip *nmk_chip;
- struct gpio_chip *chip;
- int ret;
-
- pdata = dev->dev.platform_data;
- ret = amba_request_regions(dev, pdata->name);
- if (ret)
- return ret;
-
- nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL);
- if (!nmk_chip) {
- ret = -ENOMEM;
- goto out_amba;
- }
- /*
- * The virt address in nmk_chip->addr is in the nomadik register space,
- * so we can simply convert the resource address, without remapping
- */
- nmk_chip->addr = io_p2v(dev->res.start);
- nmk_chip->chip = nmk_gpio_template;
- nmk_chip->parent_irq = pdata->parent_irq;
-
- chip = &nmk_chip->chip;
- chip->base = pdata->first_gpio;
- chip->label = pdata->name;
- chip->dev = &dev->dev;
- chip->owner = THIS_MODULE;
-
- ret = gpiochip_add(&nmk_chip->chip);
- if (ret)
- goto out_free;
-
- amba_set_drvdata(dev, nmk_chip);
-
- nmk_gpio_init_irq(nmk_chip);
-
- dev_info(&dev->dev, "Bits %i-%i at address %p\n",
- nmk_chip->chip.base, nmk_chip->chip.base+31, nmk_chip->addr);
- return 0;
-
- out_free:
- kfree(nmk_chip);
- out_amba:
- amba_release_regions(dev);
- dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret,
- pdata->first_gpio, pdata->first_gpio+31);
- return ret;
-}
-
-static int nmk_gpio_remove(struct amba_device *dev)
-{
- struct nmk_gpio_chip *nmk_chip;
-
- nmk_chip = amba_get_drvdata(dev);
- gpiochip_remove(&nmk_chip->chip);
- kfree(nmk_chip);
- amba_release_regions(dev);
- return 0;
-}
-
-
-/* We have 0x1f080060 and 0x1f180060, accept both using the mask */
-static struct amba_id nmk_gpio_ids[] = {
- {
- .id = 0x1f080060,
- .mask = 0xffefffff,
- },
- {0, 0},
-};
-
-static struct amba_driver nmk_gpio_driver = {
- .drv = {
- .owner = THIS_MODULE,
- .name = "gpio",
- },
- .probe = nmk_gpio_probe,
- .remove = nmk_gpio_remove,
- .suspend = NULL, /* to be done */
- .resume = NULL,
- .id_table = nmk_gpio_ids,
-};
-
-static int __init nmk_gpio_init(void)
-{
- return amba_driver_register(&nmk_gpio_driver);
-}
-
-arch_initcall(nmk_gpio_init);
-
-MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
-MODULE_DESCRIPTION("Nomadik GPIO Driver");
-MODULE_LICENSE("GPL");
-
-
-/*
- * Structures and registers for GPIO access in the Nomadik SoC
- *
- * Copyright (C) 2008 STMicroelectronics
- * Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
- * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
#ifndef __ASM_ARCH_GPIO_H
#define __ASM_ARCH_GPIO_H
-#include <asm-generic/gpio.h>
-
-/*
- * These currently cause a function call to happen, they may be optimized
- * if needed by adding cpu-specific defines to identify blocks
- * (see mach-pxa/include/mach/gpio.h as an example using GPLR etc)
- */
-#define gpio_get_value __gpio_get_value
-#define gpio_set_value __gpio_set_value
-#define gpio_cansleep __gpio_cansleep
-#define gpio_to_irq __gpio_to_irq
-
-/*
- * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
- * the "gpio" namespace for generic and cross-machine functions
- */
-
-/* Register in the logic block */
-#define NMK_GPIO_DAT 0x00
-#define NMK_GPIO_DATS 0x04
-#define NMK_GPIO_DATC 0x08
-#define NMK_GPIO_PDIS 0x0c
-#define NMK_GPIO_DIR 0x10
-#define NMK_GPIO_DIRS 0x14
-#define NMK_GPIO_DIRC 0x18
-#define NMK_GPIO_SLPC 0x1c
-#define NMK_GPIO_AFSLA 0x20
-#define NMK_GPIO_AFSLB 0x24
-
-#define NMK_GPIO_RIMSC 0x40
-#define NMK_GPIO_FIMSC 0x44
-#define NMK_GPIO_IS 0x48
-#define NMK_GPIO_IC 0x4c
-#define NMK_GPIO_RWIMSC 0x50
-#define NMK_GPIO_FWIMSC 0x54
-#define NMK_GPIO_WKS 0x58
-
-/* Alternate functions: function C is set in hw by setting both A and B */
-#define NMK_GPIO_ALT_GPIO 0
-#define NMK_GPIO_ALT_A 1
-#define NMK_GPIO_ALT_B 2
-#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
-
-extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
-extern int nmk_gpio_get_mode(int gpio);
-
-/*
- * Platform data to register a block: only the initial gpio/irq number.
- */
-struct nmk_gpio_platform_data {
- char *name;
- int first_gpio;
- int first_irq;
- int parent_irq;
-};
+#include <plat/gpio.h>
#endif /* __ASM_ARCH_GPIO_H */
to multiple interrupt generating programmable
32-bit free running decrementing counters.
+config NOMADIK_GPIO
+ bool
+ help
+ Support for the Nomadik GPIO controller.
+
endif
# Licensed under GPLv2
obj-$(CONFIG_HAS_MTU) += timer.o
+obj-$(CONFIG_NOMADIK_GPIO) += gpio.o
--- /dev/null
+/*
+ * Generic GPIO driver for logic cells found in the Nomadik SoC
+ *
+ * Copyright (C) 2008,2009 STMicroelectronics
+ * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
+ * Rewritten based on work by Prafulla WADASKAR <prafulla.wadaskar@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/amba/bus.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+
+#include <mach/hardware.h>
+#include <mach/gpio.h>
+
+/*
+ * The GPIO module in the Nomadik family of Systems-on-Chip is an
+ * AMBA device, managing 32 pins and alternate functions. The logic block
+ * is currently only used in the Nomadik.
+ *
+ * Symbols in this file are called "nmk_gpio" for "nomadik gpio"
+ */
+
+#define NMK_GPIO_PER_CHIP 32
+struct nmk_gpio_chip {
+ struct gpio_chip chip;
+ void __iomem *addr;
+ unsigned int parent_irq;
+ spinlock_t *lock;
+ /* Keep track of configured edges */
+ u32 edge_rising;
+ u32 edge_falling;
+};
+
+/* Mode functions */
+int nmk_gpio_set_mode(int gpio, int gpio_mode)
+{
+ struct nmk_gpio_chip *nmk_chip;
+ unsigned long flags;
+ u32 afunc, bfunc, bit;
+
+ nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
+ if (!nmk_chip)
+ return -EINVAL;
+
+ bit = 1 << (gpio - nmk_chip->chip.base);
+
+ spin_lock_irqsave(&nmk_chip->lock, flags);
+ afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & ~bit;
+ bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & ~bit;
+ if (gpio_mode & NMK_GPIO_ALT_A)
+ afunc |= bit;
+ if (gpio_mode & NMK_GPIO_ALT_B)
+ bfunc |= bit;
+ writel(afunc, nmk_chip->addr + NMK_GPIO_AFSLA);
+ writel(bfunc, nmk_chip->addr + NMK_GPIO_AFSLB);
+ spin_unlock_irqrestore(&nmk_chip->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL(nmk_gpio_set_mode);
+
+int nmk_gpio_get_mode(int gpio)
+{
+ struct nmk_gpio_chip *nmk_chip;
+ u32 afunc, bfunc, bit;
+
+ nmk_chip = get_irq_chip_data(NOMADIK_GPIO_TO_IRQ(gpio));
+ if (!nmk_chip)
+ return -EINVAL;
+
+ bit = 1 << (gpio - nmk_chip->chip.base);
+
+ afunc = readl(nmk_chip->addr + NMK_GPIO_AFSLA) & bit;
+ bfunc = readl(nmk_chip->addr + NMK_GPIO_AFSLB) & bit;
+
+ return (afunc ? NMK_GPIO_ALT_A : 0) | (bfunc ? NMK_GPIO_ALT_B : 0);
+}
+EXPORT_SYMBOL(nmk_gpio_get_mode);
+
+
+/* IRQ functions */
+static inline int nmk_gpio_get_bitmask(int gpio)
+{
+ return 1 << (gpio % 32);
+}
+
+static void nmk_gpio_irq_ack(unsigned int irq)
+{
+ int gpio;
+ struct nmk_gpio_chip *nmk_chip;
+
+ gpio = NOMADIK_IRQ_TO_GPIO(irq);
+ nmk_chip = get_irq_chip_data(irq);
+ if (!nmk_chip)
+ return;
+ writel(nmk_gpio_get_bitmask(gpio), nmk_chip->addr + NMK_GPIO_IC);
+}
+
+static void nmk_gpio_irq_mask(unsigned int irq)
+{
+ int gpio;
+ struct nmk_gpio_chip *nmk_chip;
+ unsigned long flags;
+ u32 bitmask, reg;
+
+ gpio = NOMADIK_IRQ_TO_GPIO(irq);
+ nmk_chip = get_irq_chip_data(irq);
+ bitmask = nmk_gpio_get_bitmask(gpio);
+ if (!nmk_chip)
+ return;
+
+ /* we must individually clear the two edges */
+ spin_lock_irqsave(&nmk_chip->lock, flags);
+ if (nmk_chip->edge_rising & bitmask) {
+ reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
+ reg &= ~bitmask;
+ writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
+ }
+ if (nmk_chip->edge_falling & bitmask) {
+ reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
+ reg &= ~bitmask;
+ writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
+ }
+ spin_unlock_irqrestore(&nmk_chip->lock, flags);
+};
+
+static void nmk_gpio_irq_unmask(unsigned int irq)
+{
+ int gpio;
+ struct nmk_gpio_chip *nmk_chip;
+ unsigned long flags;
+ u32 bitmask, reg;
+
+ gpio = NOMADIK_IRQ_TO_GPIO(irq);
+ nmk_chip = get_irq_chip_data(irq);
+ bitmask = nmk_gpio_get_bitmask(gpio);
+ if (!nmk_chip)
+ return;
+
+ /* we must individually set the two edges */
+ spin_lock_irqsave(&nmk_chip->lock, flags);
+ if (nmk_chip->edge_rising & bitmask) {
+ reg = readl(nmk_chip->addr + NMK_GPIO_RWIMSC);
+ reg |= bitmask;
+ writel(reg, nmk_chip->addr + NMK_GPIO_RWIMSC);
+ }
+ if (nmk_chip->edge_falling & bitmask) {
+ reg = readl(nmk_chip->addr + NMK_GPIO_FWIMSC);
+ reg |= bitmask;
+ writel(reg, nmk_chip->addr + NMK_GPIO_FWIMSC);
+ }
+ spin_unlock_irqrestore(&nmk_chip->lock, flags);
+}
+
+static int nmk_gpio_irq_set_type(unsigned int irq, unsigned int type)
+{
+ int gpio;
+ struct nmk_gpio_chip *nmk_chip;
+ unsigned long flags;
+ u32 bitmask;
+
+ gpio = NOMADIK_IRQ_TO_GPIO(irq);
+ nmk_chip = get_irq_chip_data(irq);
+ bitmask = nmk_gpio_get_bitmask(gpio);
+ if (!nmk_chip)
+ return -EINVAL;
+
+ if (type & IRQ_TYPE_LEVEL_HIGH)
+ return -EINVAL;
+ if (type & IRQ_TYPE_LEVEL_LOW)
+ return -EINVAL;
+
+ spin_lock_irqsave(&nmk_chip->lock, flags);
+
+ nmk_chip->edge_rising &= ~bitmask;
+ if (type & IRQ_TYPE_EDGE_RISING)
+ nmk_chip->edge_rising |= bitmask;
+ writel(nmk_chip->edge_rising, nmk_chip->addr + NMK_GPIO_RIMSC);
+
+ nmk_chip->edge_falling &= ~bitmask;
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ nmk_chip->edge_falling |= bitmask;
+ writel(nmk_chip->edge_falling, nmk_chip->addr + NMK_GPIO_FIMSC);
+
+ spin_unlock_irqrestore(&nmk_chip->lock, flags);
+
+ nmk_gpio_irq_unmask(irq);
+
+ return 0;
+}
+
+static struct irq_chip nmk_gpio_irq_chip = {
+ .name = "Nomadik-GPIO",
+ .ack = nmk_gpio_irq_ack,
+ .mask = nmk_gpio_irq_mask,
+ .unmask = nmk_gpio_irq_unmask,
+ .set_type = nmk_gpio_irq_set_type,
+};
+
+static void nmk_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct nmk_gpio_chip *nmk_chip;
+ struct irq_chip *host_chip;
+ unsigned int gpio_irq;
+ u32 pending;
+ unsigned int first_irq;
+
+ nmk_chip = get_irq_data(irq);
+ first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
+ while ( (pending = readl(nmk_chip->addr + NMK_GPIO_IS)) ) {
+ gpio_irq = first_irq + __ffs(pending);
+ generic_handle_irq(gpio_irq);
+ }
+ if (0) {/* don't ack parent irq, as ack == disable */
+ host_chip = get_irq_chip(irq);
+ host_chip->ack(irq);
+ }
+}
+
+static int nmk_gpio_init_irq(struct nmk_gpio_chip *nmk_chip)
+{
+ unsigned int first_irq;
+ int i;
+
+ first_irq = NOMADIK_GPIO_TO_IRQ(nmk_chip->chip.base);
+ for (i = first_irq; i < first_irq + NMK_GPIO_PER_CHIP; i++) {
+ set_irq_chip(i, &nmk_gpio_irq_chip);
+ set_irq_handler(i, handle_edge_irq);
+ set_irq_flags(i, IRQF_VALID);
+ set_irq_chip_data(i, nmk_chip);
+ }
+ set_irq_chained_handler(nmk_chip->parent_irq, nmk_gpio_irq_handler);
+ set_irq_data(nmk_chip->parent_irq, nmk_chip);
+ return 0;
+}
+
+/* I/O Functions */
+static int nmk_gpio_make_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct nmk_gpio_chip *nmk_chip =
+ container_of(chip, struct nmk_gpio_chip, chip);
+
+ writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRC);
+ return 0;
+}
+
+static int nmk_gpio_make_output(struct gpio_chip *chip, unsigned offset,
+ int val)
+{
+ struct nmk_gpio_chip *nmk_chip =
+ container_of(chip, struct nmk_gpio_chip, chip);
+
+ writel(1 << offset, nmk_chip->addr + NMK_GPIO_DIRS);
+ return 0;
+}
+
+static int nmk_gpio_get_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct nmk_gpio_chip *nmk_chip =
+ container_of(chip, struct nmk_gpio_chip, chip);
+ u32 bit = 1 << offset;
+
+ return (readl(nmk_chip->addr + NMK_GPIO_DAT) & bit) != 0;
+}
+
+static void nmk_gpio_set_output(struct gpio_chip *chip, unsigned offset,
+ int val)
+{
+ struct nmk_gpio_chip *nmk_chip =
+ container_of(chip, struct nmk_gpio_chip, chip);
+ u32 bit = 1 << offset;
+
+ if (val)
+ writel(bit, nmk_chip->addr + NMK_GPIO_DATS);
+ else
+ writel(bit, nmk_chip->addr + NMK_GPIO_DATC);
+}
+
+/* This structure is replicated for each GPIO block allocated at probe time */
+static struct gpio_chip nmk_gpio_template = {
+ .direction_input = nmk_gpio_make_input,
+ .get = nmk_gpio_get_input,
+ .direction_output = nmk_gpio_make_output,
+ .set = nmk_gpio_set_output,
+ .ngpio = NMK_GPIO_PER_CHIP,
+ .can_sleep = 0,
+};
+
+static int __init nmk_gpio_probe(struct amba_device *dev, struct amba_id *id)
+{
+ struct nmk_gpio_platform_data *pdata;
+ struct nmk_gpio_chip *nmk_chip;
+ struct gpio_chip *chip;
+ int ret;
+
+ pdata = dev->dev.platform_data;
+ ret = amba_request_regions(dev, pdata->name);
+ if (ret)
+ return ret;
+
+ nmk_chip = kzalloc(sizeof(*nmk_chip), GFP_KERNEL);
+ if (!nmk_chip) {
+ ret = -ENOMEM;
+ goto out_amba;
+ }
+ /*
+ * The virt address in nmk_chip->addr is in the nomadik register space,
+ * so we can simply convert the resource address, without remapping
+ */
+ nmk_chip->addr = io_p2v(dev->res.start);
+ nmk_chip->chip = nmk_gpio_template;
+ nmk_chip->parent_irq = pdata->parent_irq;
+
+ chip = &nmk_chip->chip;
+ chip->base = pdata->first_gpio;
+ chip->label = pdata->name;
+ chip->dev = &dev->dev;
+ chip->owner = THIS_MODULE;
+
+ ret = gpiochip_add(&nmk_chip->chip);
+ if (ret)
+ goto out_free;
+
+ amba_set_drvdata(dev, nmk_chip);
+
+ nmk_gpio_init_irq(nmk_chip);
+
+ dev_info(&dev->dev, "Bits %i-%i at address %p\n",
+ nmk_chip->chip.base, nmk_chip->chip.base+31, nmk_chip->addr);
+ return 0;
+
+ out_free:
+ kfree(nmk_chip);
+ out_amba:
+ amba_release_regions(dev);
+ dev_err(&dev->dev, "Failure %i for GPIO %i-%i\n", ret,
+ pdata->first_gpio, pdata->first_gpio+31);
+ return ret;
+}
+
+static int nmk_gpio_remove(struct amba_device *dev)
+{
+ struct nmk_gpio_chip *nmk_chip;
+
+ nmk_chip = amba_get_drvdata(dev);
+ gpiochip_remove(&nmk_chip->chip);
+ kfree(nmk_chip);
+ amba_release_regions(dev);
+ return 0;
+}
+
+
+/* We have 0x1f080060 and 0x1f180060, accept both using the mask */
+static struct amba_id nmk_gpio_ids[] = {
+ {
+ .id = 0x1f080060,
+ .mask = 0xffefffff,
+ },
+ {0, 0},
+};
+
+static struct amba_driver nmk_gpio_driver = {
+ .drv = {
+ .owner = THIS_MODULE,
+ .name = "gpio",
+ },
+ .probe = nmk_gpio_probe,
+ .remove = nmk_gpio_remove,
+ .suspend = NULL, /* to be done */
+ .resume = NULL,
+ .id_table = nmk_gpio_ids,
+};
+
+static int __init nmk_gpio_init(void)
+{
+ return amba_driver_register(&nmk_gpio_driver);
+}
+
+arch_initcall(nmk_gpio_init);
+
+MODULE_AUTHOR("Prafulla WADASKAR and Alessandro Rubini");
+MODULE_DESCRIPTION("Nomadik GPIO Driver");
+MODULE_LICENSE("GPL");
+
+
--- /dev/null
+/*
+ * Structures and registers for GPIO access in the Nomadik SoC
+ *
+ * Copyright (C) 2008 STMicroelectronics
+ * Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
+ * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __ASM_PLAT_GPIO_H
+#define __ASM_PLAT_GPIO_H
+
+#include <asm-generic/gpio.h>
+
+/*
+ * These currently cause a function call to happen, they may be optimized
+ * if needed by adding cpu-specific defines to identify blocks
+ * (see mach-pxa/include/mach/gpio.h as an example using GPLR etc)
+ */
+#define gpio_get_value __gpio_get_value
+#define gpio_set_value __gpio_set_value
+#define gpio_cansleep __gpio_cansleep
+#define gpio_to_irq __gpio_to_irq
+
+/*
+ * "nmk_gpio" and "NMK_GPIO" stand for "Nomadik GPIO", leaving
+ * the "gpio" namespace for generic and cross-machine functions
+ */
+
+/* Register in the logic block */
+#define NMK_GPIO_DAT 0x00
+#define NMK_GPIO_DATS 0x04
+#define NMK_GPIO_DATC 0x08
+#define NMK_GPIO_PDIS 0x0c
+#define NMK_GPIO_DIR 0x10
+#define NMK_GPIO_DIRS 0x14
+#define NMK_GPIO_DIRC 0x18
+#define NMK_GPIO_SLPC 0x1c
+#define NMK_GPIO_AFSLA 0x20
+#define NMK_GPIO_AFSLB 0x24
+
+#define NMK_GPIO_RIMSC 0x40
+#define NMK_GPIO_FIMSC 0x44
+#define NMK_GPIO_IS 0x48
+#define NMK_GPIO_IC 0x4c
+#define NMK_GPIO_RWIMSC 0x50
+#define NMK_GPIO_FWIMSC 0x54
+#define NMK_GPIO_WKS 0x58
+
+/* Alternate functions: function C is set in hw by setting both A and B */
+#define NMK_GPIO_ALT_GPIO 0
+#define NMK_GPIO_ALT_A 1
+#define NMK_GPIO_ALT_B 2
+#define NMK_GPIO_ALT_C (NMK_GPIO_ALT_A | NMK_GPIO_ALT_B)
+
+extern int nmk_gpio_set_mode(int gpio, int gpio_mode);
+extern int nmk_gpio_get_mode(int gpio);
+
+/*
+ * Platform data to register a block: only the initial gpio/irq number.
+ */
+struct nmk_gpio_platform_data {
+ char *name;
+ int first_gpio;
+ int first_irq;
+ int parent_irq;
+};
+
+#endif /* __ASM_PLAT_GPIO_H */
projects / ~shefty / rdma-dev.git / commitdiff