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Diffstat (limited to 'arch/avr32/mach-at32ap/pio.c')
-rw-r--r--arch/avr32/mach-at32ap/pio.c470
1 files changed, 0 insertions, 470 deletions
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
deleted file mode 100644
index 7fae6ec7e8ec..000000000000
--- a/arch/avr32/mach-at32ap/pio.c
+++ /dev/null
@@ -1,470 +0,0 @@
-/*
- * Atmel PIO2 Port Multiplexer support
- *
- * Copyright (C) 2004-2006 Atmel Corporation
- *
- * 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/clk.h>
-#include <linux/debugfs.h>
-#include <linux/export.h>
-#include <linux/fs.h>
-#include <linux/platform_device.h>
-#include <linux/irq.h>
-#include <linux/gpio.h>
-
-#include <asm/io.h>
-
-#include <mach/portmux.h>
-
-#include "pio.h"
-
-#define MAX_NR_PIO_DEVICES 8
-
-struct pio_device {
- struct gpio_chip chip;
- void __iomem *regs;
- const struct platform_device *pdev;
- struct clk *clk;
- u32 pinmux_mask;
- char name[8];
-};
-
-static struct pio_device pio_dev[MAX_NR_PIO_DEVICES];
-
-static struct pio_device *gpio_to_pio(unsigned int gpio)
-{
- struct pio_device *pio;
- unsigned int index;
-
- index = gpio >> 5;
- if (index >= MAX_NR_PIO_DEVICES)
- return NULL;
- pio = &pio_dev[index];
- if (!pio->regs)
- return NULL;
-
- return pio;
-}
-
-/* Pin multiplexing API */
-static DEFINE_SPINLOCK(pio_lock);
-
-void __init at32_select_periph(unsigned int port, u32 pin_mask,
- unsigned int periph, unsigned long flags)
-{
- struct pio_device *pio;
-
- /* assign and verify pio */
- pio = gpio_to_pio(port);
- if (unlikely(!pio)) {
- printk(KERN_WARNING "pio: invalid port %u\n", port);
- goto fail;
- }
-
- /* Test if any of the requested pins is already muxed */
- spin_lock(&pio_lock);
- if (unlikely(pio->pinmux_mask & pin_mask)) {
- printk(KERN_WARNING "%s: pin(s) busy (requested 0x%x, busy 0x%x)\n",
- pio->name, pin_mask, pio->pinmux_mask & pin_mask);
- spin_unlock(&pio_lock);
- goto fail;
- }
-
- pio->pinmux_mask |= pin_mask;
-
- /* enable pull ups */
- pio_writel(pio, PUER, pin_mask);
-
- /* select either peripheral A or B */
- if (periph)
- pio_writel(pio, BSR, pin_mask);
- else
- pio_writel(pio, ASR, pin_mask);
-
- /* enable peripheral control */
- pio_writel(pio, PDR, pin_mask);
-
- /* Disable pull ups if not requested. */
- if (!(flags & AT32_GPIOF_PULLUP))
- pio_writel(pio, PUDR, pin_mask);
-
- spin_unlock(&pio_lock);
-
- return;
-
-fail:
- dump_stack();
-}
-
-void __init at32_select_gpio(unsigned int pin, unsigned long flags)
-{
- struct pio_device *pio;
- unsigned int pin_index = pin & 0x1f;
- u32 mask = 1 << pin_index;
-
- pio = gpio_to_pio(pin);
- if (unlikely(!pio)) {
- printk("pio: invalid pin %u\n", pin);
- goto fail;
- }
-
- if (unlikely(test_and_set_bit(pin_index, &pio->pinmux_mask))) {
- printk("%s: pin %u is busy\n", pio->name, pin_index);
- goto fail;
- }
-
- if (flags & AT32_GPIOF_OUTPUT) {
- if (flags & AT32_GPIOF_HIGH)
- pio_writel(pio, SODR, mask);
- else
- pio_writel(pio, CODR, mask);
- if (flags & AT32_GPIOF_MULTIDRV)
- pio_writel(pio, MDER, mask);
- else
- pio_writel(pio, MDDR, mask);
- pio_writel(pio, PUDR, mask);
- pio_writel(pio, OER, mask);
- } else {
- if (flags & AT32_GPIOF_PULLUP)
- pio_writel(pio, PUER, mask);
- else
- pio_writel(pio, PUDR, mask);
- if (flags & AT32_GPIOF_DEGLITCH)
- pio_writel(pio, IFER, mask);
- else
- pio_writel(pio, IFDR, mask);
- pio_writel(pio, ODR, mask);
- }
-
- pio_writel(pio, PER, mask);
-
- return;
-
-fail:
- dump_stack();
-}
-
-/*
- * Undo a previous pin reservation. Will not affect the hardware
- * configuration.
- */
-void at32_deselect_pin(unsigned int pin)
-{
- struct pio_device *pio;
- unsigned int pin_index = pin & 0x1f;
-
- pio = gpio_to_pio(pin);
- if (unlikely(!pio)) {
- printk("pio: invalid pin %u\n", pin);
- dump_stack();
- return;
- }
-
- clear_bit(pin_index, &pio->pinmux_mask);
-}
-
-/* Reserve a pin, preventing anyone else from changing its configuration. */
-void __init at32_reserve_pin(unsigned int port, u32 pin_mask)
-{
- struct pio_device *pio;
-
- /* assign and verify pio */
- pio = gpio_to_pio(port);
- if (unlikely(!pio)) {
- printk(KERN_WARNING "pio: invalid port %u\n", port);
- goto fail;
- }
-
- /* Test if any of the requested pins is already muxed */
- spin_lock(&pio_lock);
- if (unlikely(pio->pinmux_mask & pin_mask)) {
- printk(KERN_WARNING "%s: pin(s) busy (req. 0x%x, busy 0x%x)\n",
- pio->name, pin_mask, pio->pinmux_mask & pin_mask);
- spin_unlock(&pio_lock);
- goto fail;
- }
-
- /* Reserve pins */
- pio->pinmux_mask |= pin_mask;
- spin_unlock(&pio_lock);
- return;
-
-fail:
- dump_stack();
-}
-
-/*--------------------------------------------------------------------------*/
-
-/* GPIO API */
-
-static int direction_input(struct gpio_chip *chip, unsigned offset)
-{
- struct pio_device *pio = gpiochip_get_data(chip);
- u32 mask = 1 << offset;
-
- if (!(pio_readl(pio, PSR) & mask))
- return -EINVAL;
-
- pio_writel(pio, ODR, mask);
- return 0;
-}
-
-static int gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- struct pio_device *pio = gpiochip_get_data(chip);
-
- return (pio_readl(pio, PDSR) >> offset) & 1;
-}
-
-static void gpio_set(struct gpio_chip *chip, unsigned offset, int value);
-
-static int direction_output(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct pio_device *pio = gpiochip_get_data(chip);
- u32 mask = 1 << offset;
-
- if (!(pio_readl(pio, PSR) & mask))
- return -EINVAL;
-
- gpio_set(chip, offset, value);
- pio_writel(pio, OER, mask);
- return 0;
-}
-
-static void gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- struct pio_device *pio = gpiochip_get_data(chip);
- u32 mask = 1 << offset;
-
- if (value)
- pio_writel(pio, SODR, mask);
- else
- pio_writel(pio, CODR, mask);
-}
-
-/*--------------------------------------------------------------------------*/
-
-/* GPIO IRQ support */
-
-static void gpio_irq_mask(struct irq_data *d)
-{
- unsigned gpio = irq_to_gpio(d->irq);
- struct pio_device *pio = &pio_dev[gpio >> 5];
-
- pio_writel(pio, IDR, 1 << (gpio & 0x1f));
-}
-
-static void gpio_irq_unmask(struct irq_data *d)
-{
- unsigned gpio = irq_to_gpio(d->irq);
- struct pio_device *pio = &pio_dev[gpio >> 5];
-
- pio_writel(pio, IER, 1 << (gpio & 0x1f));
-}
-
-static int gpio_irq_type(struct irq_data *d, unsigned type)
-{
- if (type != IRQ_TYPE_EDGE_BOTH && type != IRQ_TYPE_NONE)
- return -EINVAL;
-
- return 0;
-}
-
-static struct irq_chip gpio_irqchip = {
- .name = "gpio",
- .irq_mask = gpio_irq_mask,
- .irq_unmask = gpio_irq_unmask,
- .irq_set_type = gpio_irq_type,
-};
-
-static void gpio_irq_handler(struct irq_desc *desc)
-{
- struct pio_device *pio = irq_desc_get_chip_data(desc);
- unsigned gpio_irq;
-
- gpio_irq = (unsigned) irq_desc_get_handler_data(desc);
- for (;;) {
- u32 isr;
-
- /* ack pending GPIO interrupts */
- isr = pio_readl(pio, ISR) & pio_readl(pio, IMR);
- if (!isr)
- break;
- do {
- int i;
-
- i = ffs(isr) - 1;
- isr &= ~(1 << i);
-
- i += gpio_irq;
- generic_handle_irq(i);
- } while (isr);
- }
-}
-
-static void __init
-gpio_irq_setup(struct pio_device *pio, int irq, int gpio_irq)
-{
- unsigned i;
-
- irq_set_chip_data(irq, pio);
-
- for (i = 0; i < 32; i++, gpio_irq++) {
- irq_set_chip_data(gpio_irq, pio);
- irq_set_chip_and_handler(gpio_irq, &gpio_irqchip,
- handle_simple_irq);
- }
-
- irq_set_chained_handler_and_data(irq, gpio_irq_handler,
- (void *)gpio_irq);
-}
-
-/*--------------------------------------------------------------------------*/
-
-#ifdef CONFIG_DEBUG_FS
-
-#include <linux/seq_file.h>
-
-/*
- * This shows more info than the generic gpio dump code:
- * pullups, deglitching, open drain drive.
- */
-static void pio_bank_show(struct seq_file *s, struct gpio_chip *chip)
-{
- struct pio_device *pio = gpiochip_get_data(chip);
- u32 psr, osr, imr, pdsr, pusr, ifsr, mdsr;
- unsigned i;
- u32 mask;
- char bank;
-
- psr = pio_readl(pio, PSR);
- osr = pio_readl(pio, OSR);
- imr = pio_readl(pio, IMR);
- pdsr = pio_readl(pio, PDSR);
- pusr = pio_readl(pio, PUSR);
- ifsr = pio_readl(pio, IFSR);
- mdsr = pio_readl(pio, MDSR);
-
- bank = 'A' + pio->pdev->id;
-
- for (i = 0, mask = 1; i < 32; i++, mask <<= 1) {
- const char *label;
-
- label = gpiochip_is_requested(chip, i);
- if (!label && (imr & mask))
- label = "[irq]";
- if (!label)
- continue;
-
- seq_printf(s, " gpio-%-3d P%c%-2d (%-12s) %s %s %s",
- chip->base + i, bank, i,
- label,
- (osr & mask) ? "out" : "in ",
- (mask & pdsr) ? "hi" : "lo",
- (mask & pusr) ? " " : "up");
- if (ifsr & mask)
- seq_puts(s, " deglitch");
- if ((osr & mdsr) & mask)
- seq_puts(s, " open-drain");
- if (imr & mask)
- seq_printf(s, " irq-%d edge-both",
- gpio_to_irq(chip->base + i));
- seq_putc(s, '\n');
- }
-}
-
-#else
-#define pio_bank_show NULL
-#endif
-
-
-/*--------------------------------------------------------------------------*/
-
-static int __init pio_probe(struct platform_device *pdev)
-{
- struct pio_device *pio = NULL;
- int irq = platform_get_irq(pdev, 0);
- int gpio_irq_base = GPIO_IRQ_BASE + pdev->id * 32;
-
- BUG_ON(pdev->id >= MAX_NR_PIO_DEVICES);
- pio = &pio_dev[pdev->id];
- BUG_ON(!pio->regs);
-
- pio->chip.label = pio->name;
- pio->chip.base = pdev->id * 32;
- pio->chip.ngpio = 32;
- pio->chip.parent = &pdev->dev;
- pio->chip.owner = THIS_MODULE;
-
- pio->chip.direction_input = direction_input;
- pio->chip.get = gpio_get;
- pio->chip.direction_output = direction_output;
- pio->chip.set = gpio_set;
- pio->chip.dbg_show = pio_bank_show;
-
- gpiochip_add_data(&pio->chip, pio);
-
- gpio_irq_setup(pio, irq, gpio_irq_base);
-
- platform_set_drvdata(pdev, pio);
-
- printk(KERN_DEBUG "%s: base 0x%p, irq %d chains %d..%d\n",
- pio->name, pio->regs, irq, gpio_irq_base, gpio_irq_base + 31);
-
- return 0;
-}
-
-static struct platform_driver pio_driver = {
- .driver = {
- .name = "pio",
- },
-};
-
-static int __init pio_init(void)
-{
- return platform_driver_probe(&pio_driver, pio_probe);
-}
-postcore_initcall(pio_init);
-
-void __init at32_init_pio(struct platform_device *pdev)
-{
- struct resource *regs;
- struct pio_device *pio;
-
- if (pdev->id >= MAX_NR_PIO_DEVICES) {
- dev_err(&pdev->dev, "only %d PIO devices supported\n",
- MAX_NR_PIO_DEVICES);
- return;
- }
-
- pio = &pio_dev[pdev->id];
- snprintf(pio->name, sizeof(pio->name), "pio%d", pdev->id);
-
- regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!regs) {
- dev_err(&pdev->dev, "no mmio resource defined\n");
- return;
- }
-
- pio->clk = clk_get(&pdev->dev, "mck");
- if (IS_ERR(pio->clk))
- /*
- * This is a fatal error, but if we continue we might
- * be so lucky that we manage to initialize the
- * console and display this message...
- */
- dev_err(&pdev->dev, "no mck clock defined\n");
- else
- clk_enable(pio->clk);
-
- pio->pdev = pdev;
- pio->regs = ioremap(regs->start, resource_size(regs));
-
- /* start with irqs disabled and acked */
- pio_writel(pio, IDR, ~0UL);
- (void) pio_readl(pio, ISR);
-}