ARM: LPC32XX: GPIO, timer, and IRQ drivers

Common drivers for the LPC32XX used on all platforms

Signed-off-by: Kevin Wells <wellsk40@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

arch/arm/mach-lpc32xx/gpiolib.c

@@ -0,0 +1,446 @@
+/*
+ * arch/arm/mach-lpc32xx/gpiolib.c
+ *
+ * Author: Kevin Wells <kevin.wells@nxp.com>
+ *
+ * Copyright (C) 2010 NXP Semiconductors
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/errno.h>
+#include <linux/gpio.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include "common.h"
+
+#define LPC32XX_GPIO_P3_INP_STATE		_GPREG(0x000)
+#define LPC32XX_GPIO_P3_OUTP_SET		_GPREG(0x004)
+#define LPC32XX_GPIO_P3_OUTP_CLR		_GPREG(0x008)
+#define LPC32XX_GPIO_P3_OUTP_STATE		_GPREG(0x00C)
+#define LPC32XX_GPIO_P2_DIR_SET			_GPREG(0x010)
+#define LPC32XX_GPIO_P2_DIR_CLR			_GPREG(0x014)
+#define LPC32XX_GPIO_P2_DIR_STATE		_GPREG(0x018)
+#define LPC32XX_GPIO_P2_INP_STATE		_GPREG(0x01C)
+#define LPC32XX_GPIO_P2_OUTP_SET		_GPREG(0x020)
+#define LPC32XX_GPIO_P2_OUTP_CLR		_GPREG(0x024)
+#define LPC32XX_GPIO_P2_MUX_SET			_GPREG(0x028)
+#define LPC32XX_GPIO_P2_MUX_CLR			_GPREG(0x02C)
+#define LPC32XX_GPIO_P2_MUX_STATE		_GPREG(0x030)
+#define LPC32XX_GPIO_P0_INP_STATE		_GPREG(0x040)
+#define LPC32XX_GPIO_P0_OUTP_SET		_GPREG(0x044)
+#define LPC32XX_GPIO_P0_OUTP_CLR		_GPREG(0x048)
+#define LPC32XX_GPIO_P0_OUTP_STATE		_GPREG(0x04C)
+#define LPC32XX_GPIO_P0_DIR_SET			_GPREG(0x050)
+#define LPC32XX_GPIO_P0_DIR_CLR			_GPREG(0x054)
+#define LPC32XX_GPIO_P0_DIR_STATE		_GPREG(0x058)
+#define LPC32XX_GPIO_P1_INP_STATE		_GPREG(0x060)
+#define LPC32XX_GPIO_P1_OUTP_SET		_GPREG(0x064)
+#define LPC32XX_GPIO_P1_OUTP_CLR		_GPREG(0x068)
+#define LPC32XX_GPIO_P1_OUTP_STATE		_GPREG(0x06C)
+#define LPC32XX_GPIO_P1_DIR_SET			_GPREG(0x070)
+#define LPC32XX_GPIO_P1_DIR_CLR			_GPREG(0x074)
+#define LPC32XX_GPIO_P1_DIR_STATE		_GPREG(0x078)
+
+#define GPIO012_PIN_TO_BIT(x)			(1 << (x))
+#define GPIO3_PIN_TO_BIT(x)			(1 << ((x) + 25))
+#define GPO3_PIN_TO_BIT(x)			(1 << (x))
+#define GPIO012_PIN_IN_SEL(x, y)		(((x) >> (y)) & 1)
+#define GPIO3_PIN_IN_SHIFT(x)			((x) == 5 ? 24 : 10 + (x))
+#define GPIO3_PIN_IN_SEL(x, y)			((x) >> GPIO3_PIN_IN_SHIFT(y))
+#define GPIO3_PIN5_IN_SEL(x)			(((x) >> 24) & 1)
+#define GPI3_PIN_IN_SEL(x, y)			(((x) >> (y)) & 1)
+
+struct gpio_regs {
+	void __iomem *inp_state;
+	void __iomem *outp_set;
+	void __iomem *outp_clr;
+	void __iomem *dir_set;
+	void __iomem *dir_clr;
+};
+
+/*
+ * GPIO names
+ */
+static const char *gpio_p0_names[LPC32XX_GPIO_P0_MAX] = {
+	"p0.0", "p0.1", "p0.2", "p0.3",
+	"p0.4", "p0.5", "p0.6", "p0.7"
+};
+
+static const char *gpio_p1_names[LPC32XX_GPIO_P1_MAX] = {
+	"p1.0", "p1.1", "p1.2", "p1.3",
+	"p1.4", "p1.5", "p1.6", "p1.7",
+	"p1.8", "p1.9", "p1.10", "p1.11",
+	"p1.12", "p1.13", "p1.14", "p1.15",
+	"p1.16", "p1.17", "p1.18", "p1.19",
+	"p1.20", "p1.21", "p1.22", "p1.23",
+};
+
+static const char *gpio_p2_names[LPC32XX_GPIO_P2_MAX] = {
+	"p2.0", "p2.1", "p2.2", "p2.3",
+	"p2.4", "p2.5", "p2.6", "p2.7",
+	"p2.8", "p2.9", "p2.10", "p2.11",
+	"p2.12"
+};
+
+static const char *gpio_p3_names[LPC32XX_GPIO_P3_MAX] = {
+	"gpi000", "gpio01", "gpio02", "gpio03",
+	"gpio04", "gpio05"
+};
+
+static const char *gpi_p3_names[LPC32XX_GPI_P3_MAX] = {
+	"gpi00", "gpi01", "gpi02", "gpi03",
+	"gpi04", "gpi05", "gpi06", "gpi07",
+	"gpi08", "gpi09",  NULL,    NULL,
+	 NULL,    NULL,    NULL,   "gpi15",
+	"gpi16", "gpi17", "gpi18", "gpi19",
+	"gpi20", "gpi21", "gpi22", "gpi23",
+	"gpi24", "gpi25", "gpi26", "gpi27"
+};
+
+static const char *gpo_p3_names[LPC32XX_GPO_P3_MAX] = {
+	"gpo00", "gpo01", "gpo02", "gpo03",
+	"gpo04", "gpo05", "gpo06", "gpo07",
+	"gpo08", "gpo09", "gpo10", "gpo11",
+	"gpo12", "gpo13", "gpo14", "gpo15",
+	"gpo16", "gpo17", "gpo18", "gpo19",
+	"gpo20", "gpo21", "gpo22", "gpo23"
+};
+
+static struct gpio_regs gpio_grp_regs_p0 = {
+	.inp_state	= LPC32XX_GPIO_P0_INP_STATE,
+	.outp_set	= LPC32XX_GPIO_P0_OUTP_SET,
+	.outp_clr	= LPC32XX_GPIO_P0_OUTP_CLR,
+	.dir_set	= LPC32XX_GPIO_P0_DIR_SET,
+	.dir_clr	= LPC32XX_GPIO_P0_DIR_CLR,
+};
+
+static struct gpio_regs gpio_grp_regs_p1 = {
+	.inp_state	= LPC32XX_GPIO_P1_INP_STATE,
+	.outp_set	= LPC32XX_GPIO_P1_OUTP_SET,
+	.outp_clr	= LPC32XX_GPIO_P1_OUTP_CLR,
+	.dir_set	= LPC32XX_GPIO_P1_DIR_SET,
+	.dir_clr	= LPC32XX_GPIO_P1_DIR_CLR,
+};
+
+static struct gpio_regs gpio_grp_regs_p2 = {
+	.inp_state	= LPC32XX_GPIO_P2_INP_STATE,
+	.outp_set	= LPC32XX_GPIO_P2_OUTP_SET,
+	.outp_clr	= LPC32XX_GPIO_P2_OUTP_CLR,
+	.dir_set	= LPC32XX_GPIO_P2_DIR_SET,
+	.dir_clr	= LPC32XX_GPIO_P2_DIR_CLR,
+};
+
+static struct gpio_regs gpio_grp_regs_p3 = {
+	.inp_state	= LPC32XX_GPIO_P3_INP_STATE,
+	.outp_set	= LPC32XX_GPIO_P3_OUTP_SET,
+	.outp_clr	= LPC32XX_GPIO_P3_OUTP_CLR,
+	.dir_set	= LPC32XX_GPIO_P2_DIR_SET,
+	.dir_clr	= LPC32XX_GPIO_P2_DIR_CLR,
+};
+
+struct lpc32xx_gpio_chip {
+	struct gpio_chip	chip;
+	struct gpio_regs	*gpio_grp;
+};
+
+static inline struct lpc32xx_gpio_chip *to_lpc32xx_gpio(
+	struct gpio_chip *gpc)
+{
+	return container_of(gpc, struct lpc32xx_gpio_chip, chip);
+}
+
+static void __set_gpio_dir_p012(struct lpc32xx_gpio_chip *group,
+	unsigned pin, int input)
+{
+	if (input)
+		__raw_writel(GPIO012_PIN_TO_BIT(pin),
+			group->gpio_grp->dir_clr);
+	else
+		__raw_writel(GPIO012_PIN_TO_BIT(pin),
+			group->gpio_grp->dir_set);
+}
+
+static void __set_gpio_dir_p3(struct lpc32xx_gpio_chip *group,
+	unsigned pin, int input)
+{
+	u32 u = GPIO3_PIN_TO_BIT(pin);
+
+	if (input)
+		__raw_writel(u, group->gpio_grp->dir_clr);
+	else
+		__raw_writel(u, group->gpio_grp->dir_set);
+}
+
+static void __set_gpio_level_p012(struct lpc32xx_gpio_chip *group,
+	unsigned pin, int high)
+{
+	if (high)
+		__raw_writel(GPIO012_PIN_TO_BIT(pin),
+			group->gpio_grp->outp_set);
+	else
+		__raw_writel(GPIO012_PIN_TO_BIT(pin),
+			group->gpio_grp->outp_clr);
+}
+
+static void __set_gpio_level_p3(struct lpc32xx_gpio_chip *group,
+	unsigned pin, int high)
+{
+	u32 u = GPIO3_PIN_TO_BIT(pin);
+
+	if (high)
+		__raw_writel(u, group->gpio_grp->outp_set);
+	else
+		__raw_writel(u, group->gpio_grp->outp_clr);
+}
+
+static void __set_gpo_level_p3(struct lpc32xx_gpio_chip *group,
+	unsigned pin, int high)
+{
+	if (high)
+		__raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_set);
+	else
+		__raw_writel(GPO3_PIN_TO_BIT(pin), group->gpio_grp->outp_clr);
+}
+
+static int __get_gpio_state_p012(struct lpc32xx_gpio_chip *group,
+	unsigned pin)
+{
+	return GPIO012_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state),
+		pin);
+}
+
+static int __get_gpio_state_p3(struct lpc32xx_gpio_chip *group,
+	unsigned pin)
+{
+	int state = __raw_readl(group->gpio_grp->inp_state);
+
+	/*
+	 * P3 GPIO pin input mapping is not contiguous, GPIOP3-0..4 is mapped
+	 * to bits 10..14, while GPIOP3-5 is mapped to bit 24.
+	 */
+	return GPIO3_PIN_IN_SEL(state, pin);
+}
+
+static int __get_gpi_state_p3(struct lpc32xx_gpio_chip *group,
+	unsigned pin)
+{
+	return GPI3_PIN_IN_SEL(__raw_readl(group->gpio_grp->inp_state), pin);
+}
+
+/*
+ * GENERIC_GPIO primitives.
+ */
+static int lpc32xx_gpio_dir_input_p012(struct gpio_chip *chip,
+	unsigned pin)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_dir_p012(group, pin, 1);
+
+	return 0;
+}
+
+static int lpc32xx_gpio_dir_input_p3(struct gpio_chip *chip,
+	unsigned pin)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_dir_p3(group, pin, 1);
+
+	return 0;
+}
+
+static int lpc32xx_gpio_dir_in_always(struct gpio_chip *chip,
+	unsigned pin)
+{
+	return 0;
+}
+
+static int lpc32xx_gpio_get_value_p012(struct gpio_chip *chip, unsigned pin)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	return __get_gpio_state_p012(group, pin);
+}
+
+static int lpc32xx_gpio_get_value_p3(struct gpio_chip *chip, unsigned pin)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	return __get_gpio_state_p3(group, pin);
+}
+
+static int lpc32xx_gpi_get_value(struct gpio_chip *chip, unsigned pin)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	return __get_gpi_state_p3(group, pin);
+}
+
+static int lpc32xx_gpio_dir_output_p012(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_dir_p012(group, pin, 0);
+
+	return 0;
+}
+
+static int lpc32xx_gpio_dir_output_p3(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_dir_p3(group, pin, 0);
+
+	return 0;
+}
+
+static int lpc32xx_gpio_dir_out_always(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	return 0;
+}
+
+static void lpc32xx_gpio_set_value_p012(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_level_p012(group, pin, value);
+}
+
+static void lpc32xx_gpio_set_value_p3(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpio_level_p3(group, pin, value);
+}
+
+static void lpc32xx_gpo_set_value(struct gpio_chip *chip, unsigned pin,
+	int value)
+{
+	struct lpc32xx_gpio_chip *group = to_lpc32xx_gpio(chip);
+
+	__set_gpo_level_p3(group, pin, value);
+}
+
+static int lpc32xx_gpio_request(struct gpio_chip *chip, unsigned pin)
+{
+	if (pin < chip->ngpio)
+		return 0;
+
+	return -EINVAL;
+}
+
+static struct lpc32xx_gpio_chip lpc32xx_gpiochip[] = {
+	{
+		.chip = {
+			.label			= "gpio_p0",
+			.direction_input	= lpc32xx_gpio_dir_input_p012,
+			.get			= lpc32xx_gpio_get_value_p012,
+			.direction_output	= lpc32xx_gpio_dir_output_p012,
+			.set			= lpc32xx_gpio_set_value_p012,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPIO_P0_GRP,
+			.ngpio			= LPC32XX_GPIO_P0_MAX,
+			.names			= gpio_p0_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p0,
+	},
+	{
+		.chip = {
+			.label			= "gpio_p1",
+			.direction_input	= lpc32xx_gpio_dir_input_p012,
+			.get			= lpc32xx_gpio_get_value_p012,
+			.direction_output	= lpc32xx_gpio_dir_output_p012,
+			.set			= lpc32xx_gpio_set_value_p012,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPIO_P1_GRP,
+			.ngpio			= LPC32XX_GPIO_P1_MAX,
+			.names			= gpio_p1_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p1,
+	},
+	{
+		.chip = {
+			.label			= "gpio_p2",
+			.direction_input	= lpc32xx_gpio_dir_input_p012,
+			.get			= lpc32xx_gpio_get_value_p012,
+			.direction_output	= lpc32xx_gpio_dir_output_p012,
+			.set			= lpc32xx_gpio_set_value_p012,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPIO_P2_GRP,
+			.ngpio			= LPC32XX_GPIO_P2_MAX,
+			.names			= gpio_p2_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p2,
+	},
+	{
+		.chip = {
+			.label			= "gpio_p3",
+			.direction_input	= lpc32xx_gpio_dir_input_p3,
+			.get			= lpc32xx_gpio_get_value_p3,
+			.direction_output	= lpc32xx_gpio_dir_output_p3,
+			.set			= lpc32xx_gpio_set_value_p3,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPIO_P3_GRP,
+			.ngpio			= LPC32XX_GPIO_P3_MAX,
+			.names			= gpio_p3_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p3,
+	},
+	{
+		.chip = {
+			.label			= "gpi_p3",
+			.direction_input	= lpc32xx_gpio_dir_in_always,
+			.get			= lpc32xx_gpi_get_value,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPI_P3_GRP,
+			.ngpio			= LPC32XX_GPI_P3_MAX,
+			.names			= gpi_p3_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p3,
+	},
+	{
+		.chip = {
+			.label			= "gpo_p3",
+			.direction_output	= lpc32xx_gpio_dir_out_always,
+			.set			= lpc32xx_gpo_set_value,
+			.request		= lpc32xx_gpio_request,
+			.base			= LPC32XX_GPO_P3_GRP,
+			.ngpio			= LPC32XX_GPO_P3_MAX,
+			.names			= gpo_p3_names,
+			.can_sleep		= 0,
+		},
+		.gpio_grp = &gpio_grp_regs_p3,
+	},
+};
+
+void __init lpc32xx_gpio_init(void)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(lpc32xx_gpiochip); i++)
+		gpiochip_add(&lpc32xx_gpiochip[i].chip);
+}

arch/arm/mach-lpc32xx/irq.c

@@ -0,0 +1,432 @@
+/*
+ * arch/arm/mach-lpc32xx/irq.c
+ *
+ * Author: Kevin Wells <kevin.wells@nxp.com>
+ *
+ * Copyright (C) 2010 NXP Semiconductors
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/err.h>
+#include <linux/io.h>
+
+#include <mach/irqs.h>
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include "common.h"
+
+/*
+ * Default value representing the Activation polarity of all internal
+ * interrupt sources
+ */
+#define MIC_APR_DEFAULT		0x3FF0EFE0
+#define SIC1_APR_DEFAULT	0xFBD27186
+#define SIC2_APR_DEFAULT	0x801810C0
+
+/*
+ * Default value representing the Activation Type of all internal
+ * interrupt sources. All are level sensitive.
+ */
+#define MIC_ATR_DEFAULT		0x00000000
+#define SIC1_ATR_DEFAULT	0x00026000
+#define SIC2_ATR_DEFAULT	0x00000000
+
+struct lpc32xx_event_group_regs {
+	void __iomem *enab_reg;
+	void __iomem *edge_reg;
+	void __iomem *maskstat_reg;
+	void __iomem *rawstat_reg;
+};
+
+static const struct lpc32xx_event_group_regs lpc32xx_event_int_regs = {
+	.enab_reg = LPC32XX_CLKPWR_INT_ER,
+	.edge_reg = LPC32XX_CLKPWR_INT_AP,
+	.maskstat_reg = LPC32XX_CLKPWR_INT_SR,
+	.rawstat_reg = LPC32XX_CLKPWR_INT_RS,
+};
+
+static const struct lpc32xx_event_group_regs lpc32xx_event_pin_regs = {
+	.enab_reg = LPC32XX_CLKPWR_PIN_ER,
+	.edge_reg = LPC32XX_CLKPWR_PIN_AP,
+	.maskstat_reg = LPC32XX_CLKPWR_PIN_SR,
+	.rawstat_reg = LPC32XX_CLKPWR_PIN_RS,
+};
+
+struct lpc32xx_event_info {
+	const struct lpc32xx_event_group_regs *event_group;
+	u32 mask;
+};
+
+/*
+ * Maps an IRQ number to and event mask and register
+ */
+static const struct lpc32xx_event_info lpc32xx_events[NR_IRQS] = {
+	[IRQ_LPC32XX_GPI_08] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_08_BIT,
+	},
+	[IRQ_LPC32XX_GPI_09] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_09_BIT,
+	},
+	[IRQ_LPC32XX_GPI_19] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_19_BIT,
+	},
+	[IRQ_LPC32XX_GPI_07] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_07_BIT,
+	},
+	[IRQ_LPC32XX_GPI_00] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_00_BIT,
+	},
+	[IRQ_LPC32XX_GPI_01] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_01_BIT,
+	},
+	[IRQ_LPC32XX_GPI_02] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_02_BIT,
+	},
+	[IRQ_LPC32XX_GPI_03] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_03_BIT,
+	},
+	[IRQ_LPC32XX_GPI_04] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_04_BIT,
+	},
+	[IRQ_LPC32XX_GPI_05] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_05_BIT,
+	},
+	[IRQ_LPC32XX_GPI_06] = {
+		.event_group = &lpc32xx_event_pin_regs,
+		.mask = LPC32XX_CLKPWR_EXTSRC_GPI_06_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_00] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_00_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_01] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_01_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_02] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_02_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_03] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_03_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_04] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_04_BIT,
+	},
+	[IRQ_LPC32XX_GPIO_05] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_GPIO_05_BIT,
+	},
+	[IRQ_LPC32XX_KEY] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_KEY_BIT,
+	},
+	[IRQ_LPC32XX_USB_OTG_ATX] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_USBATXINT_BIT,
+	},
+	[IRQ_LPC32XX_USB_HOST] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_USB_BIT,
+	},
+	[IRQ_LPC32XX_RTC] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_RTC_BIT,
+	},
+	[IRQ_LPC32XX_MSTIMER] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT,
+	},
+	[IRQ_LPC32XX_TS_AUX] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_TS_AUX_BIT,
+	},
+	[IRQ_LPC32XX_TS_P] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_TS_P_BIT,
+	},
+	[IRQ_LPC32XX_TS_IRQ] = {
+		.event_group = &lpc32xx_event_int_regs,
+		.mask = LPC32XX_CLKPWR_INTSRC_ADC_BIT,
+	},
+};
+
+static void get_controller(unsigned int irq, unsigned int *base,
+	unsigned int *irqbit)
+{
+	if (irq < 32) {
+		*base = LPC32XX_MIC_BASE;
+		*irqbit = 1 << irq;
+	} else if (irq < 64) {
+		*base = LPC32XX_SIC1_BASE;
+		*irqbit = 1 << (irq - 32);
+	} else {
+		*base = LPC32XX_SIC2_BASE;
+		*irqbit = 1 << (irq - 64);
+	}
+}
+
+static void lpc32xx_mask_irq(unsigned int irq)
+{
+	unsigned int reg, ctrl, mask;
+
+	get_controller(irq, &ctrl, &mask);
+
+	reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) & ~mask;
+	__raw_writel(reg, LPC32XX_INTC_MASK(ctrl));
+}
+
+static void lpc32xx_unmask_irq(unsigned int irq)
+{
+	unsigned int reg, ctrl, mask;
+
+	get_controller(irq, &ctrl, &mask);
+
+	reg = __raw_readl(LPC32XX_INTC_MASK(ctrl)) | mask;
+	__raw_writel(reg, LPC32XX_INTC_MASK(ctrl));
+}
+
+static void lpc32xx_ack_irq(unsigned int irq)
+{
+	unsigned int ctrl, mask;
+
+	get_controller(irq, &ctrl, &mask);
+
+	__raw_writel(mask, LPC32XX_INTC_RAW_STAT(ctrl));
+
+	/* Also need to clear pending wake event */
+	if (lpc32xx_events[irq].mask != 0)
+		__raw_writel(lpc32xx_events[irq].mask,
+			lpc32xx_events[irq].event_group->rawstat_reg);
+}
+
+static void __lpc32xx_set_irq_type(unsigned int irq, int use_high_level,
+	int use_edge)
+{
+	unsigned int reg, ctrl, mask;
+
+	get_controller(irq, &ctrl, &mask);
+
+	/* Activation level, high or low */
+	reg = __raw_readl(LPC32XX_INTC_POLAR(ctrl));
+	if (use_high_level)
+		reg |= mask;
+	else
+		reg &= ~mask;
+	__raw_writel(reg, LPC32XX_INTC_POLAR(ctrl));
+
+	/* Activation type, edge or level */
+	reg = __raw_readl(LPC32XX_INTC_ACT_TYPE(ctrl));
+	if (use_edge)
+		reg |= mask;
+	else
+		reg &= ~mask;
+	__raw_writel(reg, LPC32XX_INTC_ACT_TYPE(ctrl));
+
+	/* Use same polarity for the wake events */
+	if (lpc32xx_events[irq].mask != 0) {
+		reg = __raw_readl(lpc32xx_events[irq].event_group->edge_reg);
+
+		if (use_high_level)
+			reg |= lpc32xx_events[irq].mask;
+		else
+			reg &= ~lpc32xx_events[irq].mask;
+
+		__raw_writel(reg, lpc32xx_events[irq].event_group->edge_reg);
+	}
+}
+
+static int lpc32xx_set_irq_type(unsigned int irq, unsigned int type)
+{
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		/* Rising edge sensitive */
+		__lpc32xx_set_irq_type(irq, 1, 1);
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		/* Falling edge sensitive */
+		__lpc32xx_set_irq_type(irq, 0, 1);
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		/* Low level sensitive */
+		__lpc32xx_set_irq_type(irq, 0, 0);
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		/* High level sensitive */
+		__lpc32xx_set_irq_type(irq, 1, 0);
+		break;
+
+	/* Other modes are not supported */
+	default:
+		return -EINVAL;
+	}
+
+	/* Ok to use the level handler for all types */
+	set_irq_handler(irq, handle_level_irq);
+
+	return 0;
+}
+
+static int lpc32xx_irq_wake(unsigned int irqno, unsigned int state)
+{
+	unsigned long eventreg;
+
+	if (lpc32xx_events[irqno].mask != 0) {
+		eventreg = __raw_readl(lpc32xx_events[irqno].
+			event_group->enab_reg);
+
+		if (state)
+			eventreg |= lpc32xx_events[irqno].mask;
+		else
+			eventreg &= ~lpc32xx_events[irqno].mask;
+
+		__raw_writel(eventreg,
+			lpc32xx_events[irqno].event_group->enab_reg);
+
+		return 0;
+	}
+
+	/* Clear event */
+	__raw_writel(lpc32xx_events[irqno].mask,
+		lpc32xx_events[irqno].event_group->rawstat_reg);
+
+	return -ENODEV;
+}
+
+static void __init lpc32xx_set_default_mappings(unsigned int apr,
+	unsigned int atr, unsigned int offset)
+{
+	unsigned int i;
+
+	/* Set activation levels for each interrupt */
+	i = 0;
+	while (i < 32) {
+		__lpc32xx_set_irq_type(offset + i, ((apr >> i) & 0x1),
+			((atr >> i) & 0x1));
+		i++;
+	}
+}
+
+static struct irq_chip lpc32xx_irq_chip = {
+	.ack = lpc32xx_ack_irq,
+	.mask = lpc32xx_mask_irq,
+	.unmask = lpc32xx_unmask_irq,
+	.set_type = lpc32xx_set_irq_type,
+	.set_wake = lpc32xx_irq_wake
+};
+
+static void lpc32xx_sic1_handler(unsigned int irq, struct irq_desc *desc)
+{
+	unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC1_BASE));
+
+	while (ints != 0) {
+		int irqno = fls(ints) - 1;
+
+		ints &= ~(1 << irqno);
+
+		generic_handle_irq(LPC32XX_SIC1_IRQ(irqno));
+	}
+}
+
+static void lpc32xx_sic2_handler(unsigned int irq, struct irq_desc *desc)
+{
+	unsigned long ints = __raw_readl(LPC32XX_INTC_STAT(LPC32XX_SIC2_BASE));
+
+	while (ints != 0) {
+		int irqno = fls(ints) - 1;
+
+		ints &= ~(1 << irqno);
+
+		generic_handle_irq(LPC32XX_SIC2_IRQ(irqno));
+	}
+}
+
+void __init lpc32xx_init_irq(void)
+{
+	unsigned int i;
+
+	/* Setup MIC */
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_MIC_BASE));
+	__raw_writel(MIC_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_MIC_BASE));
+	__raw_writel(MIC_ATR_DEFAULT, LPC32XX_INTC_ACT_TYPE(LPC32XX_MIC_BASE));
+
+	/* Setup SIC1 */
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC1_BASE));
+	__raw_writel(MIC_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC1_BASE));
+	__raw_writel(MIC_ATR_DEFAULT, LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC1_BASE));
+
+	/* Setup SIC2 */
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC2_BASE));
+	__raw_writel(MIC_APR_DEFAULT, LPC32XX_INTC_POLAR(LPC32XX_SIC2_BASE));
+	__raw_writel(MIC_ATR_DEFAULT, LPC32XX_INTC_ACT_TYPE(LPC32XX_SIC2_BASE));
+
+	/* Configure supported IRQ's */
+	for (i = 0; i < NR_IRQS; i++) {
+		set_irq_chip(i, &lpc32xx_irq_chip);
+		set_irq_handler(i, handle_level_irq);
+		set_irq_flags(i, IRQF_VALID);
+	}
+
+	/* Set default mappings */
+	lpc32xx_set_default_mappings(MIC_APR_DEFAULT, MIC_ATR_DEFAULT, 0);
+	lpc32xx_set_default_mappings(SIC1_APR_DEFAULT, SIC1_ATR_DEFAULT, 32);
+	lpc32xx_set_default_mappings(SIC2_APR_DEFAULT, SIC2_ATR_DEFAULT, 64);
+
+	/* mask all interrupts except SUBIRQ */
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_MIC_BASE));
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC1_BASE));
+	__raw_writel(0, LPC32XX_INTC_MASK(LPC32XX_SIC2_BASE));
+
+	/* MIC SUBIRQx interrupts will route handling to the chain handlers */
+	set_irq_chained_handler(IRQ_LPC32XX_SUB1IRQ, lpc32xx_sic1_handler);
+	set_irq_chained_handler(IRQ_LPC32XX_SUB2IRQ, lpc32xx_sic2_handler);
+
+	/* Initially disable all wake events */
+	__raw_writel(0, LPC32XX_CLKPWR_P01_ER);
+	__raw_writel(0, LPC32XX_CLKPWR_INT_ER);
+	__raw_writel(0, LPC32XX_CLKPWR_PIN_ER);
+
+	/*
+	 * Default wake activation polarities, all pin sources are low edge
+	 * triggered
+	 */
+	__raw_writel(LPC32XX_CLKPWR_INTSRC_TS_P_BIT |
+		LPC32XX_CLKPWR_INTSRC_MSTIMER_BIT |
+		LPC32XX_CLKPWR_INTSRC_RTC_BIT,
+		LPC32XX_CLKPWR_INT_AP);
+	__raw_writel(0, LPC32XX_CLKPWR_PIN_AP);
+
+	/* Clear latched wake event states */
+	__raw_writel(__raw_readl(LPC32XX_CLKPWR_PIN_RS),
+		LPC32XX_CLKPWR_PIN_RS);
+	__raw_writel(__raw_readl(LPC32XX_CLKPWR_INT_RS),
+		LPC32XX_CLKPWR_INT_RS);
+}

arch/arm/mach-lpc32xx/timer.c

@@ -0,0 +1,182 @@
+/*
+ * arch/arm/mach-lpc32xx/timer.c
+ *
+ * Author: Kevin Wells <kevin.wells@nxp.com>
+ *
+ * Copyright (C) 2009 - 2010 NXP Semiconductors
+ * Copyright (C) 2009 Fontys University of Applied Sciences, Eindhoven
+ *                    Ed Schouten <e.schouten@fontys.nl>
+ *                    Laurens Timmermans <l.timmermans@fontys.nl>
+ *
+ * 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.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/time.h>
+#include <linux/err.h>
+#include <linux/clockchips.h>
+
+#include <asm/mach/time.h>
+
+#include <mach/hardware.h>
+#include <mach/platform.h>
+#include "common.h"
+
+static cycle_t lpc32xx_clksrc_read(struct clocksource *cs)
+{
+	return (cycle_t)__raw_readl(LCP32XX_TIMER_TC(LPC32XX_TIMER1_BASE));
+}
+
+static struct clocksource lpc32xx_clksrc = {
+	.name	= "lpc32xx_clksrc",
+	.shift	= 24,
+	.rating	= 300,
+	.read	= lpc32xx_clksrc_read,
+	.mask	= CLOCKSOURCE_MASK(32),
+	.flags	= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+static int lpc32xx_clkevt_next_event(unsigned long delta,
+    struct clock_event_device *dev)
+{
+	__raw_writel(LCP32XX_TIMER_CNTR_TCR_RESET,
+		LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
+	__raw_writel(delta, LCP32XX_TIMER_PR(LPC32XX_TIMER0_BASE));
+	__raw_writel(LCP32XX_TIMER_CNTR_TCR_EN,
+		LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
+
+	return 0;
+}
+
+static void lpc32xx_clkevt_mode(enum clock_event_mode mode,
+    struct clock_event_device *dev)
+{
+	switch (mode) {
+	case CLOCK_EVT_MODE_PERIODIC:
+		WARN_ON(1);
+		break;
+
+	case CLOCK_EVT_MODE_ONESHOT:
+	case CLOCK_EVT_MODE_SHUTDOWN:
+		/*
+		 * Disable the timer. When using oneshot, we must also
+		 * disable the timer to wait for the first call to
+		 * set_next_event().
+		 */
+		__raw_writel(0, LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
+		break;
+
+	case CLOCK_EVT_MODE_UNUSED:
+	case CLOCK_EVT_MODE_RESUME:
+		break;
+	}
+}
+
+static struct clock_event_device lpc32xx_clkevt = {
+	.name		= "lpc32xx_clkevt",
+	.features	= CLOCK_EVT_FEAT_ONESHOT,
+	.shift		= 32,
+	.rating		= 300,
+	.set_next_event	= lpc32xx_clkevt_next_event,
+	.set_mode	= lpc32xx_clkevt_mode,
+};
+
+static irqreturn_t lpc32xx_timer_interrupt(int irq, void *dev_id)
+{
+	struct clock_event_device *evt = &lpc32xx_clkevt;
+
+	/* Clear match */
+	__raw_writel(LCP32XX_TIMER_CNTR_MTCH_BIT(0),
+		LCP32XX_TIMER_IR(LPC32XX_TIMER0_BASE));
+
+	evt->event_handler(evt);
+
+	return IRQ_HANDLED;
+}
+
+static struct irqaction lpc32xx_timer_irq = {
+	.name		= "LPC32XX Timer Tick",
+	.flags		= IRQF_DISABLED | IRQF_TIMER | IRQF_IRQPOLL,
+	.handler	= lpc32xx_timer_interrupt,
+};
+
+/*
+ * The clock management driver isn't initialized at this point, so the
+ * clocks need to be enabled here manually and then tagged as used in
+ * the clock driver initialization
+ */
+static void __init lpc32xx_timer_init(void)
+{
+	u32 clkrate, pllreg;
+
+	/* Enable timer clock */
+	__raw_writel(LPC32XX_CLKPWR_TMRPWMCLK_TIMER0_EN |
+		LPC32XX_CLKPWR_TMRPWMCLK_TIMER1_EN,
+		LPC32XX_CLKPWR_TIMERS_PWMS_CLK_CTRL_1);
+
+	/*
+	 * The clock driver isn't initialized at this point. So determine if
+	 * the SYSCLK is driven from the PLL397 or main oscillator and then use
+	 * it to compute the PLL frequency and the PCLK divider to get the base
+	 * timer rates. This rate is needed to compute the tick rate.
+	 */
+	if (clk_is_sysclk_mainosc() != 0)
+		clkrate = LPC32XX_MAIN_OSC_FREQ;
+	else
+		clkrate = 397 * LPC32XX_CLOCK_OSC_FREQ;
+
+	/* Get ARM HCLKPLL register and convert it into a frequency */
+	pllreg = __raw_readl(LPC32XX_CLKPWR_HCLKPLL_CTRL) & 0x1FFFF;
+	clkrate = clk_get_pllrate_from_reg(clkrate, pllreg);
+
+	/* Get PCLK divider and divide ARM PLL clock by it to get timer rate */
+	clkrate = clkrate / clk_get_pclk_div();
+
+	/* Initial timer setup */
+	__raw_writel(0, LCP32XX_TIMER_TCR(LPC32XX_TIMER0_BASE));
+	__raw_writel(LCP32XX_TIMER_CNTR_MTCH_BIT(0),
+		LCP32XX_TIMER_IR(LPC32XX_TIMER0_BASE));
+	__raw_writel(1, LCP32XX_TIMER_MR0(LPC32XX_TIMER0_BASE));
+	__raw_writel(LCP32XX_TIMER_CNTR_MCR_MTCH(0) |
+		LCP32XX_TIMER_CNTR_MCR_STOP(0) |
+		LCP32XX_TIMER_CNTR_MCR_RESET(0),
+		LCP32XX_TIMER_MCR(LPC32XX_TIMER0_BASE));
+
+	/* Setup tick interrupt */
+	setup_irq(IRQ_LPC32XX_TIMER0, &lpc32xx_timer_irq);
+
+	/* Setup the clockevent structure. */
+	lpc32xx_clkevt.mult = div_sc(clkrate, NSEC_PER_SEC,
+		lpc32xx_clkevt.shift);
+	lpc32xx_clkevt.max_delta_ns = clockevent_delta2ns(-1,
+		&lpc32xx_clkevt);
+	lpc32xx_clkevt.min_delta_ns = clockevent_delta2ns(1,
+		&lpc32xx_clkevt) + 1;
+	lpc32xx_clkevt.cpumask = cpumask_of(0);
+	clockevents_register_device(&lpc32xx_clkevt);
+
+	/* Use timer1 as clock source. */
+	__raw_writel(LCP32XX_TIMER_CNTR_TCR_RESET,
+		LCP32XX_TIMER_TCR(LPC32XX_TIMER1_BASE));
+	__raw_writel(0, LCP32XX_TIMER_PR(LPC32XX_TIMER1_BASE));
+	__raw_writel(0, LCP32XX_TIMER_MCR(LPC32XX_TIMER1_BASE));
+	__raw_writel(LCP32XX_TIMER_CNTR_TCR_EN,
+		LCP32XX_TIMER_TCR(LPC32XX_TIMER1_BASE));
+	lpc32xx_clksrc.mult = clocksource_hz2mult(clkrate,
+		lpc32xx_clksrc.shift);
+	clocksource_register(&lpc32xx_clksrc);
+}
+
+struct sys_timer lpc32xx_timer = {
+	.init		= &lpc32xx_timer_init,
+};
+