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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>
This commit is contained in:
Kevin Wells 2010-02-26 15:53:41 -08:00
parent b9cc4bf665
commit c4a0208fff
3 changed files with 1060 additions and 0 deletions
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446
arch/arm/mach-lpc32xx/gpiolib.c Normal file
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/*
* 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);
}

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arch/arm/mach-lpc32xx/irq.c Normal file
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/*
* 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);
}

182
arch/arm/mach-lpc32xx/timer.c Normal file
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/*
* 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,
};