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path: root/drivers/gpio/gpio-mxs.c
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Diffstat (limited to 'drivers/gpio/gpio-mxs.c')
-rw-r--r--drivers/gpio/gpio-mxs.c289
1 files changed, 0 insertions, 289 deletions
diff --git a/drivers/gpio/gpio-mxs.c b/drivers/gpio/gpio-mxs.c
deleted file mode 100644
index d8cafba8c82..00000000000
--- a/drivers/gpio/gpio-mxs.c
+++ /dev/null
@@ -1,289 +0,0 @@
-/*
- * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>
- * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
- *
- * Based on code from Freescale,
- * Copyright (C) 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
- *
- * 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/init.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/gpio.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/basic_mmio_gpio.h>
-#include <mach/mxs.h>
-
-#define MXS_SET 0x4
-#define MXS_CLR 0x8
-
-#define PINCTRL_DOUT(n) ((cpu_is_mx23() ? 0x0500 : 0x0700) + (n) * 0x10)
-#define PINCTRL_DIN(n) ((cpu_is_mx23() ? 0x0600 : 0x0900) + (n) * 0x10)
-#define PINCTRL_DOE(n) ((cpu_is_mx23() ? 0x0700 : 0x0b00) + (n) * 0x10)
-#define PINCTRL_PIN2IRQ(n) ((cpu_is_mx23() ? 0x0800 : 0x1000) + (n) * 0x10)
-#define PINCTRL_IRQEN(n) ((cpu_is_mx23() ? 0x0900 : 0x1100) + (n) * 0x10)
-#define PINCTRL_IRQLEV(n) ((cpu_is_mx23() ? 0x0a00 : 0x1200) + (n) * 0x10)
-#define PINCTRL_IRQPOL(n) ((cpu_is_mx23() ? 0x0b00 : 0x1300) + (n) * 0x10)
-#define PINCTRL_IRQSTAT(n) ((cpu_is_mx23() ? 0x0c00 : 0x1400) + (n) * 0x10)
-
-#define GPIO_INT_FALL_EDGE 0x0
-#define GPIO_INT_LOW_LEV 0x1
-#define GPIO_INT_RISE_EDGE 0x2
-#define GPIO_INT_HIGH_LEV 0x3
-#define GPIO_INT_LEV_MASK (1 << 0)
-#define GPIO_INT_POL_MASK (1 << 1)
-
-struct mxs_gpio_port {
- void __iomem *base;
- int id;
- int irq;
- int virtual_irq_start;
- struct bgpio_chip bgc;
-};
-
-/* Note: This driver assumes 32 GPIOs are handled in one register */
-
-static int mxs_gpio_set_irq_type(struct irq_data *d, unsigned int type)
-{
- u32 gpio = irq_to_gpio(d->irq);
- u32 pin_mask = 1 << (gpio & 31);
- struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- struct mxs_gpio_port *port = gc->private;
- void __iomem *pin_addr;
- int edge;
-
- switch (type) {
- case IRQ_TYPE_EDGE_RISING:
- edge = GPIO_INT_RISE_EDGE;
- break;
- case IRQ_TYPE_EDGE_FALLING:
- edge = GPIO_INT_FALL_EDGE;
- break;
- case IRQ_TYPE_LEVEL_LOW:
- edge = GPIO_INT_LOW_LEV;
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- edge = GPIO_INT_HIGH_LEV;
- break;
- default:
- return -EINVAL;
- }
-
- /* set level or edge */
- pin_addr = port->base + PINCTRL_IRQLEV(port->id);
- if (edge & GPIO_INT_LEV_MASK)
- writel(pin_mask, pin_addr + MXS_SET);
- else
- writel(pin_mask, pin_addr + MXS_CLR);
-
- /* set polarity */
- pin_addr = port->base + PINCTRL_IRQPOL(port->id);
- if (edge & GPIO_INT_POL_MASK)
- writel(pin_mask, pin_addr + MXS_SET);
- else
- writel(pin_mask, pin_addr + MXS_CLR);
-
- writel(1 << (gpio & 0x1f),
- port->base + PINCTRL_IRQSTAT(port->id) + MXS_CLR);
-
- return 0;
-}
-
-/* MXS has one interrupt *per* gpio port */
-static void mxs_gpio_irq_handler(u32 irq, struct irq_desc *desc)
-{
- u32 irq_stat;
- struct mxs_gpio_port *port = irq_get_handler_data(irq);
- u32 gpio_irq_no_base = port->virtual_irq_start;
-
- desc->irq_data.chip->irq_ack(&desc->irq_data);
-
- irq_stat = readl(port->base + PINCTRL_IRQSTAT(port->id)) &
- readl(port->base + PINCTRL_IRQEN(port->id));
-
- while (irq_stat != 0) {
- int irqoffset = fls(irq_stat) - 1;
- generic_handle_irq(gpio_irq_no_base + irqoffset);
- irq_stat &= ~(1 << irqoffset);
- }
-}
-
-/*
- * Set interrupt number "irq" in the GPIO as a wake-up source.
- * While system is running, all registered GPIO interrupts need to have
- * wake-up enabled. When system is suspended, only selected GPIO interrupts
- * need to have wake-up enabled.
- * @param irq interrupt source number
- * @param enable enable as wake-up if equal to non-zero
- * @return This function returns 0 on success.
- */
-static int mxs_gpio_set_wake_irq(struct irq_data *d, unsigned int enable)
-{
- struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
- struct mxs_gpio_port *port = gc->private;
-
- if (enable)
- enable_irq_wake(port->irq);
- else
- disable_irq_wake(port->irq);
-
- return 0;
-}
-
-static void __init mxs_gpio_init_gc(struct mxs_gpio_port *port)
-{
- struct irq_chip_generic *gc;
- struct irq_chip_type *ct;
-
- gc = irq_alloc_generic_chip("gpio-mxs", 1, port->virtual_irq_start,
- port->base, handle_level_irq);
- gc->private = port;
-
- ct = gc->chip_types;
- ct->chip.irq_ack = irq_gc_ack,
- ct->chip.irq_mask = irq_gc_mask_clr_bit;
- ct->chip.irq_unmask = irq_gc_mask_set_bit;
- ct->chip.irq_set_type = mxs_gpio_set_irq_type;
- ct->chip.irq_set_wake = mxs_gpio_set_wake_irq,
- ct->regs.ack = PINCTRL_IRQSTAT(port->id) + MXS_CLR;
- ct->regs.mask = PINCTRL_IRQEN(port->id);
-
- irq_setup_generic_chip(gc, IRQ_MSK(32), 0, IRQ_NOREQUEST, 0);
-}
-
-static int mxs_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
-{
- struct bgpio_chip *bgc = to_bgpio_chip(gc);
- struct mxs_gpio_port *port =
- container_of(bgc, struct mxs_gpio_port, bgc);
-
- return port->virtual_irq_start + offset;
-}
-
-static int __devinit mxs_gpio_probe(struct platform_device *pdev)
-{
- static void __iomem *base;
- struct mxs_gpio_port *port;
- struct resource *iores = NULL;
- int err;
-
- port = kzalloc(sizeof(struct mxs_gpio_port), GFP_KERNEL);
- if (!port)
- return -ENOMEM;
-
- port->id = pdev->id;
- port->virtual_irq_start = MXS_GPIO_IRQ_START + port->id * 32;
-
- /*
- * map memory region only once, as all the gpio ports
- * share the same one
- */
- if (!base) {
- iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!iores) {
- err = -ENODEV;
- goto out_kfree;
- }
-
- if (!request_mem_region(iores->start, resource_size(iores),
- pdev->name)) {
- err = -EBUSY;
- goto out_kfree;
- }
-
- base = ioremap(iores->start, resource_size(iores));
- if (!base) {
- err = -ENOMEM;
- goto out_release_mem;
- }
- }
- port->base = base;
-
- port->irq = platform_get_irq(pdev, 0);
- if (port->irq < 0) {
- err = -EINVAL;
- goto out_iounmap;
- }
-
- /*
- * select the pin interrupt functionality but initially
- * disable the interrupts
- */
- writel(~0U, port->base + PINCTRL_PIN2IRQ(port->id));
- writel(0, port->base + PINCTRL_IRQEN(port->id));
-
- /* clear address has to be used to clear IRQSTAT bits */
- writel(~0U, port->base + PINCTRL_IRQSTAT(port->id) + MXS_CLR);
-
- /* gpio-mxs can be a generic irq chip */
- mxs_gpio_init_gc(port);
-
- /* setup one handler for each entry */
- irq_set_chained_handler(port->irq, mxs_gpio_irq_handler);
- irq_set_handler_data(port->irq, port);
-
- err = bgpio_init(&port->bgc, &pdev->dev, 4,
- port->base + PINCTRL_DIN(port->id),
- port->base + PINCTRL_DOUT(port->id), NULL,
- port->base + PINCTRL_DOE(port->id), NULL, false);
- if (err)
- goto out_iounmap;
-
- port->bgc.gc.to_irq = mxs_gpio_to_irq;
- port->bgc.gc.base = port->id * 32;
-
- err = gpiochip_add(&port->bgc.gc);
- if (err)
- goto out_bgpio_remove;
-
- return 0;
-
-out_bgpio_remove:
- bgpio_remove(&port->bgc);
-out_iounmap:
- if (iores)
- iounmap(port->base);
-out_release_mem:
- if (iores)
- release_mem_region(iores->start, resource_size(iores));
-out_kfree:
- kfree(port);
- dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, err);
- return err;
-}
-
-static struct platform_driver mxs_gpio_driver = {
- .driver = {
- .name = "gpio-mxs",
- .owner = THIS_MODULE,
- },
- .probe = mxs_gpio_probe,
-};
-
-static int __init mxs_gpio_init(void)
-{
- return platform_driver_register(&mxs_gpio_driver);
-}
-postcore_initcall(mxs_gpio_init);
-
-MODULE_AUTHOR("Freescale Semiconductor, "
- "Daniel Mack <danielncaiaq.de>, "
- "Juergen Beisert <kernel@pengutronix.de>");
-MODULE_DESCRIPTION("Freescale MXS GPIO");
-MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-28 18:55:03 +0000