summaryrefslogtreecommitdiff
path: root/arch/arm/plat-mxc
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/plat-mxc')
-rw-r--r--arch/arm/plat-mxc/Kconfig8
-rw-r--r--arch/arm/plat-mxc/Makefile4
-rw-r--r--arch/arm/plat-mxc/clock.c331
-rw-r--r--arch/arm/plat-mxc/gpio.c253
-rw-r--r--arch/arm/plat-mxc/iomux-mx1-mx2.c156
-rw-r--r--arch/arm/plat-mxc/irq.c70
-rw-r--r--arch/arm/plat-mxc/time.c228
7 files changed, 1032 insertions, 18 deletions
diff --git a/arch/arm/plat-mxc/Kconfig b/arch/arm/plat-mxc/Kconfig
index bb6e127..e14eaad 100644
--- a/arch/arm/plat-mxc/Kconfig
+++ b/arch/arm/plat-mxc/Kconfig
@@ -3,9 +3,14 @@ if ARCH_MXC
menu "Freescale MXC Implementations"
choice
- prompt "MXC/iMX System Type"
+ prompt "MXC/iMX Base Type"
default ARCH_MX3
+config ARCH_MX2
+ bool "MX2-based"
+ help
+ This enables support for systems based on the Freescale i.MX2 family
+
config ARCH_MX3
bool "MX3-based"
help
@@ -13,6 +18,7 @@ config ARCH_MX3
endchoice
+source "arch/arm/mach-mx2/Kconfig"
source "arch/arm/mach-mx3/Kconfig"
endmenu
diff --git a/arch/arm/plat-mxc/Makefile b/arch/arm/plat-mxc/Makefile
index f96dc03..db66e9a 100644
--- a/arch/arm/plat-mxc/Makefile
+++ b/arch/arm/plat-mxc/Makefile
@@ -3,4 +3,6 @@
#
# Common support
-obj-y := irq.o
+obj-y := irq.o clock.o gpio.o time.o
+
+obj-$(CONFIG_ARCH_MX2) += iomux-mx1-mx2.o
diff --git a/arch/arm/plat-mxc/clock.c b/arch/arm/plat-mxc/clock.c
new file mode 100644
index 0000000..1aa86fd
--- /dev/null
+++ b/arch/arm/plat-mxc/clock.c
@@ -0,0 +1,331 @@
+/*
+ * Based on arch/arm/plat-omap/clock.c
+ *
+ * Copyright (C) 2004 - 2005 Nokia corporation
+ * Written by Tuukka Tikkanen <tuukka.tikkanen@elektrobit.com>
+ * Modified for omap shared clock framework by Tony Lindgren <tony@atomide.com>
+ * Copyright 2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * 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.
+ * 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.
+ */
+
+/* #define DEBUG */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/proc_fs.h>
+#include <linux/semaphore.h>
+#include <linux/string.h>
+#include <linux/version.h>
+
+#include <asm/arch/clock.h>
+
+static LIST_HEAD(clocks);
+static DEFINE_MUTEX(clocks_mutex);
+
+/*-------------------------------------------------------------------------
+ * Standard clock functions defined in include/linux/clk.h
+ *-------------------------------------------------------------------------*/
+
+/*
+ * Retrieve a clock by name.
+ *
+ * Note that we first try to use device id on the bus
+ * and clock name. If this fails, we try to use "<name>.<id>". If this fails,
+ * we try to use clock name only.
+ * The reference count to the clock's module owner ref count is incremented.
+ */
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ struct clk *p, *clk = ERR_PTR(-ENOENT);
+ int idno;
+ const char *str;
+
+ if (id == NULL)
+ return clk;
+
+ if (dev == NULL || dev->bus != &platform_bus_type)
+ idno = -1;
+ else
+ idno = to_platform_device(dev)->id;
+
+ mutex_lock(&clocks_mutex);
+
+ list_for_each_entry(p, &clocks, node) {
+ if (p->id == idno &&
+ strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
+ clk = p;
+ goto found;
+ }
+ }
+
+ str = strrchr(id, '.');
+ if (str) {
+ int cnt = str - id;
+ str++;
+ idno = simple_strtol(str, NULL, 10);
+ list_for_each_entry(p, &clocks, node) {
+ if (p->id == idno &&
+ strlen(p->name) == cnt &&
+ strncmp(id, p->name, cnt) == 0 &&
+ try_module_get(p->owner)) {
+ clk = p;
+ goto found;
+ }
+ }
+ }
+
+ list_for_each_entry(p, &clocks, node) {
+ if (strcmp(id, p->name) == 0 && try_module_get(p->owner)) {
+ clk = p;
+ goto found;
+ }
+ }
+
+ printk(KERN_WARNING "clk: Unable to get requested clock: %s\n", id);
+
+found:
+ mutex_unlock(&clocks_mutex);
+
+ return clk;
+}
+EXPORT_SYMBOL(clk_get);
+
+static void __clk_disable(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return;
+
+ __clk_disable(clk->parent);
+ __clk_disable(clk->secondary);
+
+ if (!(--clk->usecount) && clk->disable)
+ clk->disable(clk);
+}
+
+static int __clk_enable(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ __clk_enable(clk->parent);
+ __clk_enable(clk->secondary);
+
+ if (clk->usecount++ == 0 && clk->enable)
+ clk->enable(clk);
+
+ return 0;
+}
+
+/* This function increments the reference count on the clock and enables the
+ * clock if not already enabled. The parent clock tree is recursively enabled
+ */
+int clk_enable(struct clk *clk)
+{
+ int ret = 0;
+
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ mutex_lock(&clocks_mutex);
+ ret = __clk_enable(clk);
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(clk_enable);
+
+/* This function decrements the reference count on the clock and disables
+ * the clock when reference count is 0. The parent clock tree is
+ * recursively disabled
+ */
+void clk_disable(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return;
+
+ mutex_lock(&clocks_mutex);
+ __clk_disable(clk);
+ mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL(clk_disable);
+
+/* Retrieve the *current* clock rate. If the clock itself
+ * does not provide a special calculation routine, ask
+ * its parent and so on, until one is able to return
+ * a valid clock rate
+ */
+unsigned long clk_get_rate(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return 0UL;
+
+ if (clk->get_rate)
+ return clk->get_rate(clk);
+
+ return clk_get_rate(clk->parent);
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+/* Decrement the clock's module reference count */
+void clk_put(struct clk *clk)
+{
+ if (clk && !IS_ERR(clk))
+ module_put(clk->owner);
+}
+EXPORT_SYMBOL(clk_put);
+
+/* Round the requested clock rate to the nearest supported
+ * rate that is less than or equal to the requested rate.
+ * This is dependent on the clock's current parent.
+ */
+long clk_round_rate(struct clk *clk, unsigned long rate)
+{
+ if (clk == NULL || IS_ERR(clk) || !clk->round_rate)
+ return 0;
+
+ return clk->round_rate(clk, rate);
+}
+EXPORT_SYMBOL(clk_round_rate);
+
+/* Set the clock to the requested clock rate. The rate must
+ * match a supported rate exactly based on what clk_round_rate returns
+ */
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ int ret = -EINVAL;
+
+ if (clk == NULL || IS_ERR(clk) || clk->set_rate == NULL || rate == 0)
+ return ret;
+
+ mutex_lock(&clocks_mutex);
+ ret = clk->set_rate(clk, rate);
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);
+
+/* Set the clock's parent to another clock source */
+int clk_set_parent(struct clk *clk, struct clk *parent)
+{
+ int ret = -EINVAL;
+
+ if (clk == NULL || IS_ERR(clk) || parent == NULL ||
+ IS_ERR(parent) || clk->set_parent == NULL)
+ return ret;
+
+ mutex_lock(&clocks_mutex);
+ ret = clk->set_parent(clk, parent);
+ if (ret == 0)
+ clk->parent = parent;
+ mutex_unlock(&clocks_mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(clk_set_parent);
+
+/* Retrieve the clock's parent clock source */
+struct clk *clk_get_parent(struct clk *clk)
+{
+ struct clk *ret = NULL;
+
+ if (clk == NULL || IS_ERR(clk))
+ return ret;
+
+ return clk->parent;
+}
+EXPORT_SYMBOL(clk_get_parent);
+
+/*
+ * Add a new clock to the clock tree.
+ */
+int clk_register(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return -EINVAL;
+
+ mutex_lock(&clocks_mutex);
+ list_add(&clk->node, &clocks);
+ mutex_unlock(&clocks_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL(clk_register);
+
+/* Remove a clock from the clock tree */
+void clk_unregister(struct clk *clk)
+{
+ if (clk == NULL || IS_ERR(clk))
+ return;
+
+ mutex_lock(&clocks_mutex);
+ list_del(&clk->node);
+ mutex_unlock(&clocks_mutex);
+}
+EXPORT_SYMBOL(clk_unregister);
+
+#ifdef CONFIG_PROC_FS
+static int mxc_clock_read_proc(char *page, char **start, off_t off,
+ int count, int *eof, void *data)
+{
+ struct clk *clkp;
+ char *p = page;
+ int len;
+
+ list_for_each_entry(clkp, &clocks, node) {
+ p += sprintf(p, "%s-%d:\t\t%lu, %d", clkp->name, clkp->id,
+ clk_get_rate(clkp), clkp->usecount);
+ if (clkp->parent)
+ p += sprintf(p, ", %s-%d\n", clkp->parent->name,
+ clkp->parent->id);
+ else
+ p += sprintf(p, "\n");
+ }
+
+ len = (p - page) - off;
+ if (len < 0)
+ len = 0;
+
+ *eof = (len <= count) ? 1 : 0;
+ *start = page + off;
+
+ return len;
+}
+
+static int __init mxc_setup_proc_entry(void)
+{
+ struct proc_dir_entry *res;
+
+ res = create_proc_read_entry("cpu/clocks", 0, NULL,
+ mxc_clock_read_proc, NULL);
+ if (!res) {
+ printk(KERN_ERR "Failed to create proc/cpu/clocks\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+late_initcall(mxc_setup_proc_entry);
+#endif
diff --git a/arch/arm/plat-mxc/gpio.c b/arch/arm/plat-mxc/gpio.c
new file mode 100644
index 0000000..4a77367
--- /dev/null
+++ b/arch/arm/plat-mxc/gpio.c
@@ -0,0 +1,253 @@
+/*
+ * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>
+ * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
+ *
+ * Based on code from Freescale,
+ * Copyright 2004-2006 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/io.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <asm/hardware.h>
+#include <asm-generic/bug.h>
+
+static struct mxc_gpio_port *mxc_gpio_ports;
+static int gpio_table_size;
+
+/* Note: This driver assumes 32 GPIOs are handled in one register */
+
+static void _clear_gpio_irqstatus(struct mxc_gpio_port *port, u32 index)
+{
+ __raw_writel(1 << index, port->base + GPIO_ISR);
+}
+
+static void _set_gpio_irqenable(struct mxc_gpio_port *port, u32 index,
+ int enable)
+{
+ u32 l;
+
+ l = __raw_readl(port->base + GPIO_IMR);
+ l = (l & (~(1 << index))) | (!!enable << index);
+ __raw_writel(l, port->base + GPIO_IMR);
+}
+
+static void gpio_ack_irq(u32 irq)
+{
+ u32 gpio = irq_to_gpio(irq);
+ _clear_gpio_irqstatus(&mxc_gpio_ports[gpio / 32], gpio & 0x1f);
+}
+
+static void gpio_mask_irq(u32 irq)
+{
+ u32 gpio = irq_to_gpio(irq);
+ _set_gpio_irqenable(&mxc_gpio_ports[gpio / 32], gpio & 0x1f, 0);
+}
+
+static void gpio_unmask_irq(u32 irq)
+{
+ u32 gpio = irq_to_gpio(irq);
+ _set_gpio_irqenable(&mxc_gpio_ports[gpio / 32], gpio & 0x1f, 1);
+}
+
+static int gpio_set_irq_type(u32 irq, u32 type)
+{
+ u32 gpio = irq_to_gpio(irq);
+ struct mxc_gpio_port *port = &mxc_gpio_ports[gpio / 32];
+ u32 bit, val;
+ int edge;
+ void __iomem *reg = port->base;
+
+ switch (type) {
+ case IRQT_RISING:
+ edge = GPIO_INT_RISE_EDGE;
+ break;
+ case IRQT_FALLING:
+ edge = GPIO_INT_FALL_EDGE;
+ break;
+ case IRQT_LOW:
+ edge = GPIO_INT_LOW_LEV;
+ break;
+ case IRQT_HIGH:
+ edge = GPIO_INT_HIGH_LEV;
+ break;
+ default: /* this includes IRQT_BOTHEDGE */
+ return -EINVAL;
+ }
+
+ reg += GPIO_ICR1 + ((gpio & 0x10) >> 2); /* lower or upper register */
+ bit = gpio & 0xf;
+ val = __raw_readl(reg) & ~(0x3 << (bit << 1));
+ __raw_writel(val | (edge << (bit << 1)), reg);
+ _clear_gpio_irqstatus(port, gpio & 0x1f);
+
+ return 0;
+}
+
+/* handle n interrupts in one status register */
+static void mxc_gpio_irq_handler(struct mxc_gpio_port *port, u32 irq_stat)
+{
+ u32 gpio_irq_no;
+
+ gpio_irq_no = port->virtual_irq_start;
+ for (; irq_stat != 0; irq_stat >>= 1, gpio_irq_no++) {
+
+ if ((irq_stat & 1) == 0)
+ continue;
+
+ BUG_ON(!(irq_desc[gpio_irq_no].handle_irq));
+ irq_desc[gpio_irq_no].handle_irq(gpio_irq_no,
+ &irq_desc[gpio_irq_no]);
+ }
+}
+
+#ifdef CONFIG_ARCH_MX3
+/* MX3 has one interrupt *per* gpio port */
+static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+{
+ u32 irq_stat;
+ struct mxc_gpio_port *port = (struct mxc_gpio_port *)get_irq_data(irq);
+
+ irq_stat = __raw_readl(port->base + GPIO_ISR) &
+ __raw_readl(port->base + GPIO_IMR);
+ BUG_ON(!irq_stat);
+ mxc_gpio_irq_handler(port, irq_stat);
+}
+#endif
+
+#ifdef CONFIG_ARCH_MX2
+/* MX2 has one interrupt *for all* gpio ports */
+static void mx2_gpio_irq_handler(u32 irq, struct irq_desc *desc)
+{
+ int i;
+ u32 irq_msk, irq_stat;
+ struct mxc_gpio_port *port = (struct mxc_gpio_port *)get_irq_data(irq);
+
+ /* walk through all interrupt status registers */
+ for (i = 0; i < gpio_table_size; i++) {
+ irq_msk = __raw_readl(port[i].base + GPIO_IMR);
+ if (!irq_msk)
+ continue;
+
+ irq_stat = __raw_readl(port[i].base + GPIO_ISR) & irq_msk;
+ if (irq_stat)
+ mxc_gpio_irq_handler(&port[i], irq_stat);
+ }
+}
+#endif
+
+static struct irq_chip gpio_irq_chip = {
+ .ack = gpio_ack_irq,
+ .mask = gpio_mask_irq,
+ .unmask = gpio_unmask_irq,
+ .set_type = gpio_set_irq_type,
+};
+
+static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
+ int dir)
+{
+ struct mxc_gpio_port *port =
+ container_of(chip, struct mxc_gpio_port, chip);
+ u32 l;
+
+ l = __raw_readl(port->base + GPIO_GDIR);
+ if (dir)
+ l |= 1 << offset;
+ else
+ l &= ~(1 << offset);
+ __raw_writel(l, port->base + GPIO_GDIR);
+}
+
+static void mxc_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct mxc_gpio_port *port =
+ container_of(chip, struct mxc_gpio_port, chip);
+ void __iomem *reg = port->base + GPIO_DR;
+ u32 l;
+
+ l = (__raw_readl(reg) & (~(1 << offset))) | (value << offset);
+ __raw_writel(l, reg);
+}
+
+static int mxc_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct mxc_gpio_port *port =
+ container_of(chip, struct mxc_gpio_port, chip);
+
+ return (__raw_readl(port->base + GPIO_DR) >> offset) & 1;
+}
+
+static int mxc_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ _set_gpio_direction(chip, offset, 0);
+ return 0;
+}
+
+static int mxc_gpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ _set_gpio_direction(chip, offset, 1);
+ mxc_gpio_set(chip, offset, value);
+ return 0;
+}
+
+int __init mxc_gpio_init(struct mxc_gpio_port *port, int cnt)
+{
+ int i, j;
+
+ /* save for local usage */
+ mxc_gpio_ports = port;
+ gpio_table_size = cnt;
+
+ printk(KERN_INFO "MXC GPIO hardware\n");
+
+ for (i = 0; i < cnt; i++) {
+ /* disable the interrupt and clear the status */
+ __raw_writel(0, port[i].base + GPIO_IMR);
+ __raw_writel(~0, port[i].base + GPIO_ISR);
+ for (j = port[i].virtual_irq_start;
+ j < port[i].virtual_irq_start + 32; j++) {
+ set_irq_chip(j, &gpio_irq_chip);
+ set_irq_handler(j, handle_edge_irq);
+ set_irq_flags(j, IRQF_VALID);
+ }
+
+ /* register gpio chip */
+ port[i].chip.direction_input = mxc_gpio_direction_input;
+ port[i].chip.direction_output = mxc_gpio_direction_output;
+ port[i].chip.get = mxc_gpio_get;
+ port[i].chip.set = mxc_gpio_set;
+ port[i].chip.base = i * 32;
+ port[i].chip.ngpio = 32;
+
+ /* its a serious configuration bug when it fails */
+ BUG_ON( gpiochip_add(&port[i].chip) < 0 );
+
+#ifdef CONFIG_ARCH_MX3
+ /* setup one handler for each entry */
+ set_irq_chained_handler(port[i].irq, mx3_gpio_irq_handler);
+ set_irq_data(port[i].irq, &port[i]);
+#endif
+ }
+
+#ifdef CONFIG_ARCH_MX2
+ /* setup one handler for all GPIO interrupts */
+ set_irq_chained_handler(port[0].irq, mx2_gpio_irq_handler);
+ set_irq_data(port[0].irq, port);
+#endif
+ return 0;
+}
diff --git a/arch/arm/plat-mxc/iomux-mx1-mx2.c b/arch/arm/plat-mxc/iomux-mx1-mx2.c
new file mode 100644
index 0000000..1985571
--- /dev/null
+++ b/arch/arm/plat-mxc/iomux-mx1-mx2.c
@@ -0,0 +1,156 @@
+/*
+ * arch/arm/mach-mxc/generic.c
+ *
+ * author: Sascha Hauer
+ * Created: april 20th, 2004
+ * Copyright: Synertronixx GmbH
+ *
+ * Common code for i.MX machines
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/gpio.h>
+
+#include <asm/hardware.h>
+#include <asm/mach/map.h>
+#include <asm/arch/iomux-mx1-mx2.h>
+
+void mxc_gpio_mode(int gpio_mode)
+{
+ unsigned int pin = gpio_mode & GPIO_PIN_MASK;
+ unsigned int port = (gpio_mode & GPIO_PORT_MASK) >> GPIO_PORT_SHIFT;
+ unsigned int ocr = (gpio_mode & GPIO_OCR_MASK) >> GPIO_OCR_SHIFT;
+ unsigned int tmp;
+
+ /* Pullup enable */
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_PUEN(port));
+ if (gpio_mode & GPIO_PUEN)
+ tmp |= (1 << pin);
+ else
+ tmp &= ~(1 << pin);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_PUEN(port));
+
+ /* Data direction */
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_DDIR(port));
+ if (gpio_mode & GPIO_OUT)
+ tmp |= 1 << pin;
+ else
+ tmp &= ~(1 << pin);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_DDIR(port));
+
+ /* Primary / alternate function */
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_GPR(port));
+ if (gpio_mode & GPIO_AF)
+ tmp |= (1 << pin);
+ else
+ tmp &= ~(1 << pin);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_GPR(port));
+
+ /* use as gpio? */
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_GIUS(port));
+ if (gpio_mode & (GPIO_PF | GPIO_AF))
+ tmp &= ~(1 << pin);
+ else
+ tmp |= (1 << pin);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_GIUS(port));
+
+ if (pin < 16) {
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR1(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= (ocr << (pin * 2));
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR1(port));
+
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA1(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA1(port));
+
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB1(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB1(port));
+ } else {
+ pin -= 16;
+
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_OCR2(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= (ocr << (pin * 2));
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_OCR2(port));
+
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFA2(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= ((gpio_mode >> GPIO_AOUT_SHIFT) & 3) << (pin * 2);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFA2(port));
+
+ tmp = __raw_readl(VA_GPIO_BASE + MXC_ICONFB2(port));
+ tmp &= ~(3 << (pin * 2));
+ tmp |= ((gpio_mode >> GPIO_BOUT_SHIFT) & 3) << (pin * 2);
+ __raw_writel(tmp, VA_GPIO_BASE + MXC_ICONFB2(port));
+ }
+}
+EXPORT_SYMBOL(mxc_gpio_mode);
+
+int mxc_gpio_setup_multiple_pins(const int *pin_list, unsigned count,
+ int alloc_mode, const char *label)
+{
+ const int *p = pin_list;
+ int i;
+ unsigned gpio;
+ unsigned mode;
+
+ for (i = 0; i < count; i++) {
+ gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+ mode = *p & ~(GPIO_PIN_MASK | GPIO_PORT_MASK);
+
+ if (gpio >= (GPIO_PORT_MAX + 1) * 32)
+ goto setup_error;
+
+ if (alloc_mode & MXC_GPIO_ALLOC_MODE_RELEASE)
+ gpio_free(gpio);
+ else if (!(alloc_mode & MXC_GPIO_ALLOC_MODE_NO_ALLOC))
+ if (gpio_request(gpio, label)
+ && !(alloc_mode & MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
+ goto setup_error;
+
+ if (!(alloc_mode & (MXC_GPIO_ALLOC_MODE_ALLOC_ONLY |
+ MXC_GPIO_ALLOC_MODE_RELEASE)))
+ mxc_gpio_mode(gpio | mode);
+
+ p++;
+ }
+ return 0;
+
+setup_error:
+ if (alloc_mode & (MXC_GPIO_ALLOC_MODE_NO_ALLOC |
+ MXC_GPIO_ALLOC_MODE_TRY_ALLOC))
+ return -EINVAL;
+
+ while (p != pin_list) {
+ p--;
+ gpio = *p & (GPIO_PIN_MASK | GPIO_PORT_MASK);
+ gpio_free(gpio);
+ }
+
+ return -EINVAL;
+}
+EXPORT_SYMBOL(mxc_gpio_setup_multiple_pins);
+
diff --git a/arch/arm/plat-mxc/irq.c b/arch/arm/plat-mxc/irq.c
index 2ad5a69..1fbe01d 100644
--- a/arch/arm/plat-mxc/irq.c
+++ b/arch/arm/plat-mxc/irq.c
@@ -1,24 +1,59 @@
/*
- * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
+ * 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.
+ * 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.
*/
-/*
- * 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/module.h>
-#include <linux/moduleparam.h>
-#include <linux/init.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <asm/hardware.h>
+#include <linux/irq.h>
#include <asm/io.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
#include <asm/arch/common.h>
+#define AVIC_BASE IO_ADDRESS(AVIC_BASE_ADDR)
+#define AVIC_INTCNTL (AVIC_BASE + 0x00) /* int control reg */
+#define AVIC_NIMASK (AVIC_BASE + 0x04) /* int mask reg */
+#define AVIC_INTENNUM (AVIC_BASE + 0x08) /* int enable number reg */
+#define AVIC_INTDISNUM (AVIC_BASE + 0x0C) /* int disable number reg */
+#define AVIC_INTENABLEH (AVIC_BASE + 0x10) /* int enable reg high */
+#define AVIC_INTENABLEL (AVIC_BASE + 0x14) /* int enable reg low */
+#define AVIC_INTTYPEH (AVIC_BASE + 0x18) /* int type reg high */
+#define AVIC_INTTYPEL (AVIC_BASE + 0x1C) /* int type reg low */
+#define AVIC_NIPRIORITY7 (AVIC_BASE + 0x20) /* norm int priority lvl7 */
+#define AVIC_NIPRIORITY6 (AVIC_BASE + 0x24) /* norm int priority lvl6 */
+#define AVIC_NIPRIORITY5 (AVIC_BASE + 0x28) /* norm int priority lvl5 */
+#define AVIC_NIPRIORITY4 (AVIC_BASE + 0x2C) /* norm int priority lvl4 */
+#define AVIC_NIPRIORITY3 (AVIC_BASE + 0x30) /* norm int priority lvl3 */
+#define AVIC_NIPRIORITY2 (AVIC_BASE + 0x34) /* norm int priority lvl2 */
+#define AVIC_NIPRIORITY1 (AVIC_BASE + 0x38) /* norm int priority lvl1 */
+#define AVIC_NIPRIORITY0 (AVIC_BASE + 0x3C) /* norm int priority lvl0 */
+#define AVIC_NIVECSR (AVIC_BASE + 0x40) /* norm int vector/status */
+#define AVIC_FIVECSR (AVIC_BASE + 0x44) /* fast int vector/status */
+#define AVIC_INTSRCH (AVIC_BASE + 0x48) /* int source reg high */
+#define AVIC_INTSRCL (AVIC_BASE + 0x4C) /* int source reg low */
+#define AVIC_INTFRCH (AVIC_BASE + 0x50) /* int force reg high */
+#define AVIC_INTFRCL (AVIC_BASE + 0x54) /* int force reg low */
+#define AVIC_NIPNDH (AVIC_BASE + 0x58) /* norm int pending high */
+#define AVIC_NIPNDL (AVIC_BASE + 0x5C) /* norm int pending low */
+#define AVIC_FIPNDH (AVIC_BASE + 0x60) /* fast int pending high */
+#define AVIC_FIPNDL (AVIC_BASE + 0x64) /* fast int pending low */
+
+#define SYSTEM_PREV_REG IO_ADDRESS(IIM_BASE_ADDR + 0x20)
+#define SYSTEM_SREV_REG IO_ADDRESS(IIM_BASE_ADDR + 0x24)
+#define IIM_PROD_REV_SH 3
+#define IIM_PROD_REV_LEN 5
+
/* Disable interrupt number "irq" in the AVIC */
static void mxc_mask_irq(unsigned int irq)
{
@@ -32,7 +67,7 @@ static void mxc_unmask_irq(unsigned int irq)
}
static struct irq_chip mxc_avic_chip = {
- .mask_ack = mxc_mask_irq,
+ .ack = mxc_mask_irq,
.mask = mxc_mask_irq,
.unmask = mxc_unmask_irq,
};
@@ -71,5 +106,8 @@ void __init mxc_init_irq(void)
reg |= (0xF << 28);
__raw_writel(reg, AVIC_NIPRIORITY6);
+ /* init architectures chained interrupt handler */
+ mxc_register_gpios();
+
printk(KERN_INFO "MXC IRQ initialized\n");
}
diff --git a/arch/arm/plat-mxc/time.c b/arch/arm/plat-mxc/time.c
new file mode 100644
index 0000000..3bf8634
--- /dev/null
+++ b/arch/arm/plat-mxc/time.c
@@ -0,0 +1,228 @@
+/*
+ * linux/arch/arm/plat-mxc/time.c
+ *
+ * Copyright (C) 2000-2001 Deep Blue Solutions
+ * Copyright (C) 2002 Shane Nay (shane@minirl.com)
+ * Copyright (C) 2006-2007 Pavel Pisa (ppisa@pikron.com)
+ * Copyright (C) 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.
+ * 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/interrupt.h>
+#include <linux/irq.h>
+#include <linux/clockchips.h>
+#include <linux/clk.h>
+
+#include <asm/hardware.h>
+#include <asm/mach/time.h>
+#include <asm/arch/common.h>
+#include <asm/arch/mxc_timer.h>
+
+static struct clock_event_device clockevent_mxc;
+static enum clock_event_mode clockevent_mode = CLOCK_EVT_MODE_UNUSED;
+
+/* clock source for the timer */
+static struct clk *timer_clk;
+
+/* clock source */
+
+static cycle_t mxc_get_cycles(void)
+{
+ return __raw_readl(TIMER_BASE + MXC_TCN);
+}
+
+static struct clocksource clocksource_mxc = {
+ .name = "mxc_timer1",
+ .rating = 200,
+ .read = mxc_get_cycles,
+ .mask = CLOCKSOURCE_MASK(32),
+ .shift = 20,
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static int __init mxc_clocksource_init(void)
+{
+ unsigned int clock;
+
+ clock = clk_get_rate(timer_clk);
+
+ clocksource_mxc.mult = clocksource_hz2mult(clock,
+ clocksource_mxc.shift);
+ clocksource_register(&clocksource_mxc);
+
+ return 0;
+}
+
+/* clock event */
+
+static int mxc_set_next_event(unsigned long evt,
+ struct clock_event_device *unused)
+{
+ unsigned long tcmp;
+
+ tcmp = __raw_readl(TIMER_BASE + MXC_TCN) + evt;
+ __raw_writel(tcmp, TIMER_BASE + MXC_TCMP);
+
+ return (int)(tcmp - __raw_readl(TIMER_BASE + MXC_TCN)) < 0 ?
+ -ETIME : 0;
+}
+
+#ifdef DEBUG
+static const char *clock_event_mode_label[] = {
+ [CLOCK_EVT_MODE_PERIODIC] = "CLOCK_EVT_MODE_PERIODIC",
+ [CLOCK_EVT_MODE_ONESHOT] = "CLOCK_EVT_MODE_ONESHOT",
+ [CLOCK_EVT_MODE_SHUTDOWN] = "CLOCK_EVT_MODE_SHUTDOWN",
+ [CLOCK_EVT_MODE_UNUSED] = "CLOCK_EVT_MODE_UNUSED"
+};
+#endif /* DEBUG */
+
+static void mxc_set_mode(enum clock_event_mode mode,
+ struct clock_event_device *evt)
+{
+ unsigned long flags;
+
+ /*
+ * The timer interrupt generation is disabled at least
+ * for enough time to call mxc_set_next_event()
+ */
+ local_irq_save(flags);
+
+ /* Disable interrupt in GPT module */
+ gpt_irq_disable();
+
+ if (mode != clockevent_mode) {
+ /* Set event time into far-far future */
+ __raw_writel(__raw_readl(TIMER_BASE + MXC_TCN) - 3,
+ TIMER_BASE + MXC_TCMP);
+ /* Clear pending interrupt */
+ gpt_irq_acknowledge();
+ }
+
+#ifdef DEBUG
+ printk(KERN_INFO "mxc_set_mode: changing mode from %s to %s\n",
+ clock_event_mode_label[clockevent_mode],
+ clock_event_mode_label[mode]);
+#endif /* DEBUG */
+
+ /* Remember timer mode */
+ clockevent_mode = mode;
+ local_irq_restore(flags);
+
+ switch (mode) {
+ case CLOCK_EVT_MODE_PERIODIC:
+ printk(KERN_ERR"mxc_set_mode: Periodic mode is not "
+ "supported for i.MX\n");
+ break;
+ case CLOCK_EVT_MODE_ONESHOT:
+ /*
+ * Do not put overhead of interrupt enable/disable into
+ * mxc_set_next_event(), the core has about 4 minutes
+ * to call mxc_set_next_event() or shutdown clock after
+ * mode switching
+ */
+ local_irq_save(flags);
+ gpt_irq_enable();
+ local_irq_restore(flags);
+ break;
+ case CLOCK_EVT_MODE_SHUTDOWN:
+ case CLOCK_EVT_MODE_UNUSED:
+ case CLOCK_EVT_MODE_RESUME:
+ /* Left event sources disabled, no more interrupts appear */
+ break;
+ }
+}
+
+/*
+ * IRQ handler for the timer
+ */
+static irqreturn_t mxc_timer_interrupt(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = &clockevent_mxc;
+ uint32_t tstat;
+
+ tstat = __raw_readl(TIMER_BASE + MXC_TSTAT);
+
+ gpt_irq_acknowledge();
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static struct irqaction mxc_timer_irq = {
+ .name = "i.MX Timer Tick",
+ .flags = IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+ .handler = mxc_timer_interrupt,
+};
+
+static struct clock_event_device clockevent_mxc = {
+ .name = "mxc_timer1",
+ .features = CLOCK_EVT_FEAT_ONESHOT,
+ .shift = 32,
+ .set_mode = mxc_set_mode,
+ .set_next_event = mxc_set_next_event,
+ .rating = 200,
+};
+
+static int __init mxc_clockevent_init(void)
+{
+ unsigned int clock;
+
+ clock = clk_get_rate(timer_clk);
+
+ clockevent_mxc.mult = div_sc(clock, NSEC_PER_SEC,
+ clockevent_mxc.shift);
+ clockevent_mxc.max_delta_ns =
+ clockevent_delta2ns(0xfffffffe, &clockevent_mxc);
+ clockevent_mxc.min_delta_ns =
+ clockevent_delta2ns(0xff, &clockevent_mxc);
+
+ clockevent_mxc.cpumask = cpumask_of_cpu(0);
+
+ clockevents_register_device(&clockevent_mxc);
+
+ return 0;
+}
+
+void __init mxc_timer_init(const char *clk_timer)
+{
+ timer_clk = clk_get(NULL, clk_timer);
+ if (!timer_clk) {
+ printk(KERN_ERR"Cannot determine timer clock. Giving up.\n");
+ return;
+ }
+
+ clk_enable(timer_clk);
+
+ /*
+ * Initialise to a known state (all timers off, and timing reset)
+ */
+ __raw_writel(0, TIMER_BASE + MXC_TCTL);
+ __raw_writel(0, TIMER_BASE + MXC_TPRER); /* see datasheet note */
+
+ __raw_writel(TCTL_FRR | /* free running */
+ TCTL_VAL | /* set clocksource and arch specific bits */
+ TCTL_TEN, /* start the timer */
+ TIMER_BASE + MXC_TCTL);
+
+ /* init and register the timer to the framework */
+ mxc_clocksource_init();
+ mxc_clockevent_init();
+
+ /* Make irqs happen */
+ setup_irq(TIMER_INTERRUPT, &mxc_timer_irq);
+}
+