diff options
Diffstat (limited to 'arch/arm/mach-lpc32xx')
| -rw-r--r-- | arch/arm/mach-lpc32xx/gpiolib.c | 446 | ||||
| -rw-r--r-- | arch/arm/mach-lpc32xx/irq.c | 432 | ||||
| -rw-r--r-- | arch/arm/mach-lpc32xx/timer.c | 182 |
3 files changed, 1060 insertions, 0 deletions
diff --git a/arch/arm/mach-lpc32xx/gpiolib.c b/arch/arm/mach-lpc32xx/gpiolib.c new file mode 100644 index 000000000000..69061ea8997a --- /dev/null +++ b/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); +} diff --git a/arch/arm/mach-lpc32xx/irq.c b/arch/arm/mach-lpc32xx/irq.c new file mode 100644 index 000000000000..bd0df26c415b --- /dev/null +++ b/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); +} diff --git a/arch/arm/mach-lpc32xx/timer.c b/arch/arm/mach-lpc32xx/timer.c new file mode 100644 index 000000000000..630dd4a74b26 --- /dev/null +++ b/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, +}; + |
