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Diffstat (limited to 'target/linux/cns21xx/patches-2.6.37/005-arm-add-fa-gpio-driver.patch')
-rw-r--r--target/linux/cns21xx/patches-2.6.37/005-arm-add-fa-gpio-driver.patch335
1 files changed, 0 insertions, 335 deletions
diff --git a/target/linux/cns21xx/patches-2.6.37/005-arm-add-fa-gpio-driver.patch b/target/linux/cns21xx/patches-2.6.37/005-arm-add-fa-gpio-driver.patch
deleted file mode 100644
index 263a8328b3..0000000000
--- a/target/linux/cns21xx/patches-2.6.37/005-arm-add-fa-gpio-driver.patch
+++ /dev/null
@@ -1,335 +0,0 @@
---- /dev/null
-+++ b/arch/arm/plat-fa/gpio.c
-@@ -0,0 +1,275 @@
-+/*
-+ * Gpiochip and interrupt routines for Faraday FA526 based SoCs
-+ *
-+ * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
-+ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * Based on plat-mxc/gpio.c:
-+ * MXC GPIO supchip. (c) 2008 Daniel Mack <daniel@caiaq.de>
-+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
-+ *
-+ * 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.
-+ */
-+
-+#include <linux/spinlock.h>
-+
-+#include <plat/gpio.h>
-+
-+#define GPIO_DATA_OUT 0x0
-+#define GPIO_DATA_IN 0x4
-+#define GPIO_DIR 0x8
-+#define GPIO_DATA_SET 0x10
-+#define GPIO_DATA_CLR 0x14
-+#define GPIO_PULL_EN 0x18
-+#define GPIO_PULL_TYPE 0x1C
-+#define GPIO_INT_EN 0x20
-+#define GPIO_INT_STAT 0x24
-+#define GPIO_INT_MASK 0x2C
-+#define GPIO_INT_CLR 0x30
-+#define GPIO_INT_TYPE 0x34
-+#define GPIO_INT_BOTH_EDGE 0x38
-+#define GPIO_INT_LEVEL 0x3C
-+#define GPIO_DEBOUNCE_EN 0x40
-+#define GPIO_DEBOUNCE_PRESCALE 0x44
-+
-+#define GPIO_REGS_SIZE 0x48
-+
-+static DEFINE_SPINLOCK(fa_gpio_lock);
-+
-+static inline struct fa_gpio_chip *to_fgc(struct gpio_chip *chip)
-+{
-+ return container_of(chip, struct fa_gpio_chip, gpio_chip);
-+}
-+
-+static void _fa_gpio_irq_setenable(unsigned int irq, int enable)
-+{
-+ struct fa_gpio_chip *fgc = get_irq_chip_data(irq);
-+ void __iomem *base = fgc->mem_base;
-+ unsigned int gpio = irq - fgc->irq_base;
-+ unsigned int reg;
-+
-+ reg = __raw_readl(base + GPIO_INT_EN);
-+ reg = (reg & (~(1 << gpio))) | (!!enable << gpio);
-+ __raw_writel(reg, base + GPIO_INT_EN);
-+}
-+
-+static void fa_gpio_irq_ack(unsigned int irq)
-+{
-+ struct fa_gpio_chip *fgc = get_irq_chip_data(irq);
-+ unsigned int gpio = irq - fgc->irq_base;
-+
-+ __raw_writel(1 << gpio, fgc->mem_base + GPIO_INT_CLR);
-+}
-+
-+static void fa_gpio_irq_mask(unsigned int irq)
-+{
-+ _fa_gpio_irq_setenable(irq, 0);
-+}
-+
-+static void fa_gpio_irq_unmask(unsigned int irq)
-+{
-+ _fa_gpio_irq_setenable(irq, 1);
-+}
-+
-+static int fa_gpio_irq_set_type(unsigned int irq, unsigned int type)
-+{
-+ struct fa_gpio_chip *fgc = get_irq_chip_data(irq);
-+ void __iomem *base = fgc->mem_base;
-+ unsigned int gpio = irq - fgc->irq_base;
-+ unsigned int gpio_mask = 1 << gpio;
-+ unsigned int reg_both, reg_level, reg_type;
-+
-+ reg_type = __raw_readl(base + GPIO_INT_TYPE);
-+ reg_level = __raw_readl(base + GPIO_INT_LEVEL);
-+ reg_both = __raw_readl(base + GPIO_INT_BOTH_EDGE);
-+
-+ switch (type) {
-+ case IRQ_TYPE_EDGE_BOTH:
-+ reg_type &= ~gpio_mask;
-+ reg_both |= gpio_mask;
-+ break;
-+ case IRQ_TYPE_EDGE_RISING:
-+ reg_type &= ~gpio_mask;
-+ reg_both &= ~gpio_mask;
-+ reg_level &= ~gpio_mask;
-+ break;
-+ case IRQ_TYPE_EDGE_FALLING:
-+ reg_type &= ~gpio_mask;
-+ reg_both &= ~gpio_mask;
-+ reg_level |= gpio_mask;
-+ break;
-+ case IRQ_TYPE_LEVEL_HIGH:
-+ reg_type |= gpio_mask;
-+ reg_level &= ~gpio_mask;
-+ break;
-+ case IRQ_TYPE_LEVEL_LOW:
-+ reg_type |= gpio_mask;
-+ reg_level |= gpio_mask;
-+ break;
-+ default:
-+ return -EINVAL;
-+ }
-+
-+ __raw_writel(reg_type, base + GPIO_INT_TYPE);
-+ __raw_writel(reg_level, base + GPIO_INT_LEVEL);
-+ __raw_writel(reg_both, base + GPIO_INT_BOTH_EDGE);
-+
-+ fa_gpio_irq_ack(irq);
-+
-+ return 0;
-+}
-+
-+static void fa_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-+{
-+ struct fa_gpio_data *data = get_irq_data(irq);
-+ unsigned int chip;
-+
-+ for (chip = 0; chip < data->nchips; chip++) {
-+ struct fa_gpio_chip *fgc = &data->chips[chip];
-+ unsigned int status;
-+ unsigned int i;
-+
-+ status = __raw_readl(fgc->mem_base + GPIO_INT_STAT);
-+ for (i = fgc->irq_base; status != 0; status >>= 1, i++) {
-+ if ((status & 1) == 0)
-+ continue;
-+
-+ BUG_ON(!(irq_desc[i].handle_irq));
-+ irq_desc[i].handle_irq(i, &irq_desc[i]);
-+ }
-+ }
-+}
-+
-+static struct irq_chip fa_gpio_irq_chip = {
-+ .name = "GPIO",
-+ .ack = fa_gpio_irq_ack,
-+ .mask = fa_gpio_irq_mask,
-+ .unmask = fa_gpio_irq_unmask,
-+ .set_type = fa_gpio_irq_set_type,
-+};
-+
-+static void _fa_gpio_set_direction(struct fa_gpio_chip *fgc, unsigned offset,
-+ int is_output)
-+{
-+ unsigned int reg;
-+
-+ reg = __raw_readl(fgc->mem_base + GPIO_DIR);
-+ if (is_output)
-+ reg |= 1 << offset;
-+ else
-+ reg &= ~(1 << offset);
-+ __raw_writel(reg, fgc->mem_base + GPIO_DIR);
-+}
-+
-+static void _fa_gpio_set(struct fa_gpio_chip *fgc, unsigned offset, int value)
-+{
-+ if (value)
-+ __raw_writel(1 << offset, fgc->mem_base + GPIO_DATA_SET);
-+ else
-+ __raw_writel(1 << offset, fgc->mem_base + GPIO_DATA_CLR);
-+}
-+
-+static void fa_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-+{
-+ struct fa_gpio_chip *fgc = to_fgc(chip);
-+
-+ _fa_gpio_set(fgc, offset, value);
-+}
-+
-+static int fa_gpio_get(struct gpio_chip *chip, unsigned offset)
-+{
-+ struct fa_gpio_chip *fgc = to_fgc(chip);
-+
-+ return (__raw_readl(fgc->mem_base + GPIO_DATA_IN) >> offset) & 1;
-+}
-+
-+static int fa_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-+{
-+ struct fa_gpio_chip *fgc = to_fgc(chip);
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&fa_gpio_lock, flags);
-+
-+ _fa_gpio_set_direction(fgc, offset, 0);
-+
-+ spin_unlock_irqrestore(&fa_gpio_lock, flags);
-+
-+ return 0;
-+}
-+
-+static int fa_gpio_direction_output(struct gpio_chip *chip,
-+ unsigned offset,
-+ int value)
-+{
-+ struct fa_gpio_chip *fgc = to_fgc(chip);
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&fa_gpio_lock, flags);
-+
-+ _fa_gpio_set(fgc, offset, value);
-+ _fa_gpio_set_direction(fgc, offset, 1);
-+
-+ spin_unlock_irqrestore(&fa_gpio_lock, flags);
-+
-+ return 0;
-+}
-+
-+static int fa_gpio_init_chip(struct fa_gpio_chip *fgc)
-+{
-+ void __iomem *mem_base;
-+ unsigned int i;
-+ int err;
-+
-+ mem_base = ioremap(fgc->map_base, GPIO_REGS_SIZE);
-+ if (!mem_base)
-+ return -ENXIO;
-+
-+ fgc->mem_base = mem_base;
-+
-+ fgc->gpio_chip.direction_input = fa_gpio_direction_input;
-+ fgc->gpio_chip.direction_output = fa_gpio_direction_output;
-+ fgc->gpio_chip.get = fa_gpio_get;
-+ fgc->gpio_chip.set = fa_gpio_set;
-+
-+ /* disable, unmask and clear all interrupts */
-+ __raw_writel(0x0, mem_base + GPIO_INT_EN);
-+ __raw_writel(0x0, mem_base + GPIO_INT_MASK);
-+ __raw_writel(~0x0, mem_base + GPIO_INT_CLR);
-+
-+ for (i = fgc->irq_base;
-+ i < fgc->irq_base + fgc->gpio_chip.ngpio; i++) {
-+ set_irq_chip(i, &fa_gpio_irq_chip);
-+ set_irq_chip_data(i, fgc);
-+ set_irq_handler(i, handle_edge_irq);
-+ set_irq_flags(i, IRQF_VALID);
-+ }
-+
-+ err = gpiochip_add(&fgc->gpio_chip);
-+ if (err)
-+ goto unmap;
-+
-+ return 0;
-+
-+ unmap:
-+ iounmap(fgc->mem_base);
-+ return err;
-+}
-+
-+void __init fa_gpio_init(struct fa_gpio_data *data)
-+{
-+ unsigned int i;
-+
-+ for (i = 0; i < data->nchips; i++) {
-+ int err;
-+
-+ err = fa_gpio_init_chip(&data->chips[i]);
-+ if (WARN(err, "GPIO init failed\n"))
-+ return;
-+ }
-+
-+ set_irq_chained_handler(data->irq, fa_gpio_irq_handler);
-+ set_irq_data(data->irq, data);
-+}
---- /dev/null
-+++ b/arch/arm/plat-fa/include/plat/gpio.h
-@@ -0,0 +1,33 @@
-+/*
-+ * Copyright (c) 2010 Gabor Juhos <juhosg@openwrt.org>
-+ *
-+ * This file 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 _FA_GPIO_H
-+#define _FA_GPIO_H
-+
-+#include <linux/init.h>
-+#include <linux/gpio.h>
-+#include <linux/irq.h>
-+#include <linux/io.h>
-+
-+struct fa_gpio_chip {
-+ struct gpio_chip gpio_chip;
-+ unsigned int map_base;
-+ unsigned int irq_base;
-+
-+ void __iomem *mem_base;
-+};
-+
-+struct fa_gpio_data {
-+ struct fa_gpio_chip *chips;
-+ unsigned int nchips;
-+ unsigned int irq;
-+};
-+
-+void __init fa_gpio_init(struct fa_gpio_data *data);
-+
-+#endif /* _FA_GPIO_H */
---- a/arch/arm/plat-fa/Kconfig
-+++ b/arch/arm/plat-fa/Kconfig
-@@ -1,5 +1,8 @@
- if PLAT_FA
-
-+config PLAT_FA_GPIO
-+ def_bool n
-+
- config PLAT_FA_TIME
- def_bool n
-
---- a/arch/arm/plat-fa/Makefile
-+++ b/arch/arm/plat-fa/Makefile
-@@ -4,6 +4,7 @@
-
- obj-y :=
-
-+obj-$(CONFIG_PLAT_FA_GPIO) += gpio.o
- obj-$(CONFIG_PLAT_FA_TIME) += time.o
-
- obj-m :=
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 08:22:46 +0000