diff options
| -rw-r--r-- | Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt | 3 | ||||
| -rw-r--r-- | drivers/pinctrl/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/pinctrl/Makefile | 1 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-s3c64xx.c | 817 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-samsung.c | 4 | ||||
| -rw-r--r-- | drivers/pinctrl/pinctrl-samsung.h | 5 |
6 files changed, 835 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt index 4598a47..c70fca1 100644 --- a/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt +++ b/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt @@ -7,6 +7,7 @@ on-chip controllers onto these pads. Required Properties: - compatible: should be one of the following. + - "samsung,s3c64xx-pinctrl": for S3C64xx-compatible pin-controller, - "samsung,exynos4210-pinctrl": for Exynos4210 compatible pin-controller. - "samsung,exynos4x12-pinctrl": for Exynos4x12 compatible pin-controller. - "samsung,exynos5250-pinctrl": for Exynos5250 compatible pin-controller. @@ -105,6 +106,8 @@ B. External Wakeup Interrupts: For supporting external wakeup interrupts, a - compatible: identifies the type of the external wakeup interrupt controller The possible values are: + - samsung,s3c64xx-wakeup-eint: represents wakeup interrupt controller + found on Samsung S3C64xx SoCs, - samsung,exynos4210-wakeup-eint: represents wakeup interrupt controller found on Samsung Exynos4210 SoC. - interrupt-parent: phandle of the interrupt parent to which the external diff --git a/drivers/pinctrl/Kconfig b/drivers/pinctrl/Kconfig index ab7225e..f910962 100644 --- a/drivers/pinctrl/Kconfig +++ b/drivers/pinctrl/Kconfig @@ -208,6 +208,11 @@ config PINCTRL_EXYNOS5440 select PINMUX select PINCONF +config PINCTRL_S3C64XX + bool "Samsung S3C64XX SoC pinctrl driver" + depends on ARCH_S3C64XX + select PINCTRL_SAMSUNG + source "drivers/pinctrl/mvebu/Kconfig" source "drivers/pinctrl/sh-pfc/Kconfig" source "drivers/pinctrl/spear/Kconfig" diff --git a/drivers/pinctrl/Makefile b/drivers/pinctrl/Makefile index 82db76c..988279a 100644 --- a/drivers/pinctrl/Makefile +++ b/drivers/pinctrl/Makefile @@ -41,6 +41,7 @@ obj-$(CONFIG_PINCTRL_COH901) += pinctrl-coh901.o obj-$(CONFIG_PINCTRL_SAMSUNG) += pinctrl-samsung.o obj-$(CONFIG_PINCTRL_EXYNOS) += pinctrl-exynos.o obj-$(CONFIG_PINCTRL_EXYNOS5440) += pinctrl-exynos5440.o +obj-$(CONFIG_PINCTRL_S3C64XX) += pinctrl-s3c64xx.o obj-$(CONFIG_PINCTRL_XWAY) += pinctrl-xway.o obj-$(CONFIG_PINCTRL_LANTIQ) += pinctrl-lantiq.o diff --git a/drivers/pinctrl/pinctrl-s3c64xx.c b/drivers/pinctrl/pinctrl-s3c64xx.c new file mode 100644 index 0000000..b5d1c4a --- /dev/null +++ b/drivers/pinctrl/pinctrl-s3c64xx.c @@ -0,0 +1,817 @@ +/* + * S3C64xx specific support for pinctrl-samsung driver. + * + * Copyright (c) 2013 Tomasz Figa <tomasz.figa@gmail.com> + * + * Based on pinctrl-exynos.c, please see the file for original copyrights. + * + * 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 file contains the Samsung S3C64xx specific information required by the + * the Samsung pinctrl/gpiolib driver. It also includes the implementation of + * external gpio and wakeup interrupt support. + */ + +#include <linux/module.h> +#include <linux/device.h> +#include <linux/interrupt.h> +#include <linux/irqdomain.h> +#include <linux/irq.h> +#include <linux/of_irq.h> +#include <linux/io.h> +#include <linux/slab.h> +#include <linux/err.h> + +#include <asm/mach/irq.h> + +#include "pinctrl-samsung.h" + +#define NUM_EINT0 28 +#define NUM_EINT0_IRQ 4 +#define EINT_MAX_PER_REG 16 +#define EINT_MAX_PER_GROUP 16 + +/* External GPIO and wakeup interrupt related definitions */ +#define SVC_GROUP_SHIFT 4 +#define SVC_GROUP_MASK 0xf +#define SVC_NUM_MASK 0xf +#define SVC_GROUP(x) ((x >> SVC_GROUP_SHIFT) & \ + SVC_GROUP_MASK) + +#define EINT12CON_REG 0x200 +#define EINT12MASK_REG 0x240 +#define EINT12PEND_REG 0x260 + +#define EINT_OFFS(i) ((i) % (2 * EINT_MAX_PER_GROUP)) +#define EINT_GROUP(i) ((i) / EINT_MAX_PER_GROUP) +#define EINT_REG(g) (4 * ((g) / 2)) + +#define EINTCON_REG(i) (EINT12CON_REG + EINT_REG(EINT_GROUP(i))) +#define EINTMASK_REG(i) (EINT12MASK_REG + EINT_REG(EINT_GROUP(i))) +#define EINTPEND_REG(i) (EINT12PEND_REG + EINT_REG(EINT_GROUP(i))) + +#define SERVICE_REG 0x284 +#define SERVICEPEND_REG 0x288 + +#define EINT0CON0_REG 0x900 +#define EINT0MASK_REG 0x920 +#define EINT0PEND_REG 0x924 + +/* S3C64xx specific external interrupt trigger types */ +#define EINT_LEVEL_LOW 0 +#define EINT_LEVEL_HIGH 1 +#define EINT_EDGE_FALLING 2 +#define EINT_EDGE_RISING 4 +#define EINT_EDGE_BOTH 6 +#define EINT_CON_MASK 0xF +#define EINT_CON_LEN 4 + +static struct samsung_pin_bank_type bank_type_4bit_off = { + .fld_width = { 4, 1, 2, 0, 2, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, }, +}; + +static struct samsung_pin_bank_type bank_type_4bit_alive = { + .fld_width = { 4, 1, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, }, +}; + +static struct samsung_pin_bank_type bank_type_4bit2_off = { + .fld_width = { 4, 1, 2, 0, 2, 2, }, + .reg_offset = { 0x00, 0x08, 0x0c, 0, 0x10, 0x14, }, +}; + +static struct samsung_pin_bank_type bank_type_4bit2_alive = { + .fld_width = { 4, 1, 2, }, + .reg_offset = { 0x00, 0x08, 0x0c, }, +}; + +static struct samsung_pin_bank_type bank_type_2bit_off = { + .fld_width = { 2, 1, 2, 0, 2, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, 0, 0x0c, 0x10, }, +}; + +static struct samsung_pin_bank_type bank_type_2bit_alive = { + .fld_width = { 2, 1, 2, }, + .reg_offset = { 0x00, 0x04, 0x08, }, +}; + +#define PIN_BANK_4BIT(pins, reg, id) \ + { \ + .type = &bank_type_4bit_off, \ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_NONE, \ + .name = id \ + } + +#define PIN_BANK_4BIT_EINTG(pins, reg, id, eoffs) \ + { \ + .type = &bank_type_4bit_off, \ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_GPIO, \ + .eint_func = 7, \ + .eint_mask = (1 << (pins)) - 1, \ + .eint_offset = eoffs, \ + .name = id \ + } + +#define PIN_BANK_4BIT_EINTW(pins, reg, id, eoffs, emask) \ + { \ + .type = &bank_type_4bit_alive,\ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_WKUP, \ + .eint_func = 3, \ + .eint_mask = emask, \ + .eint_offset = eoffs, \ + .name = id \ + } + +#define PIN_BANK_4BIT2_EINTG(pins, reg, id, eoffs) \ + { \ + .type = &bank_type_4bit2_off, \ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_GPIO, \ + .eint_func = 7, \ + .eint_mask = (1 << (pins)) - 1, \ + .eint_offset = eoffs, \ + .name = id \ + } + +#define PIN_BANK_4BIT2_EINTW(pins, reg, id, eoffs, emask) \ + { \ + .type = &bank_type_4bit2_alive,\ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_WKUP, \ + .eint_func = 3, \ + .eint_mask = emask, \ + .eint_offset = eoffs, \ + .name = id \ + } + +#define PIN_BANK_4BIT2_ALIVE(pins, reg, id) \ + { \ + .type = &bank_type_4bit2_alive,\ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_NONE, \ + .name = id \ + } + +#define PIN_BANK_2BIT(pins, reg, id) \ + { \ + .type = &bank_type_2bit_off, \ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_NONE, \ + .name = id \ + } + +#define PIN_BANK_2BIT_EINTG(pins, reg, id, eoffs, emask) \ + { \ + .type = &bank_type_2bit_off, \ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_GPIO, \ + .eint_func = 3, \ + .eint_mask = emask, \ + .eint_offset = eoffs, \ + .name = id \ + } + +#define PIN_BANK_2BIT_EINTW(pins, reg, id, eoffs) \ + { \ + .type = &bank_type_2bit_alive,\ + .pctl_offset = reg, \ + .nr_pins = pins, \ + .eint_type = EINT_TYPE_WKUP, \ + .eint_func = 2, \ + .eint_mask = (1 << (pins)) - 1, \ + .eint_offset = eoffs, \ + .name = id \ + } + +/** + * struct s3c64xx_eint0_data: EINT0 common data + * @drvdata: pin controller driver data + * @domains: IRQ domains of particular EINT0 interrupts + * @pins: pin offsets inside of banks of particular EINT0 interrupts + */ +struct s3c64xx_eint0_data { + struct samsung_pinctrl_drv_data *drvdata; + struct irq_domain *domains[NUM_EINT0]; + u8 pins[NUM_EINT0]; +}; + +/** + * struct s3c64xx_eint0_domain_data: EINT0 per-domain data + * @bank: pin bank related to the domain + * @eints: EINT0 interrupts related to the domain + */ +struct s3c64xx_eint0_domain_data { + struct samsung_pin_bank *bank; + u8 eints[]; +}; + +/** + * struct s3c64xx_eint_gpio_data: GPIO EINT data + * @drvdata: pin controller driver data + * @domains: array of domains related to EINT interrupt groups + */ +struct s3c64xx_eint_gpio_data { + struct samsung_pinctrl_drv_data *drvdata; + struct irq_domain *domains[]; +}; + +/* + * Common functions for S3C64xx EINT configuration + */ + +static int s3c64xx_irq_get_trigger(unsigned int type) +{ + int trigger; + + switch (type) { + case IRQ_TYPE_EDGE_RISING: + trigger = EINT_EDGE_RISING; + break; + case IRQ_TYPE_EDGE_FALLING: + trigger = EINT_EDGE_FALLING; + break; + case IRQ_TYPE_EDGE_BOTH: + trigger = EINT_EDGE_BOTH; + break; + case IRQ_TYPE_LEVEL_HIGH: + trigger = EINT_LEVEL_HIGH; + break; + case IRQ_TYPE_LEVEL_LOW: + trigger = EINT_LEVEL_LOW; + break; + default: + return -EINVAL; + } + + return trigger; +} + +static void s3c64xx_irq_set_handler(unsigned int irq, unsigned int type) +{ + /* Edge- and level-triggered interrupts need different handlers */ + if (type & IRQ_TYPE_EDGE_BOTH) + __irq_set_handler_locked(irq, handle_edge_irq); + else + __irq_set_handler_locked(irq, handle_level_irq); +} + +static void s3c64xx_irq_set_function(struct samsung_pinctrl_drv_data *d, + struct samsung_pin_bank *bank, int pin) +{ + struct samsung_pin_bank_type *bank_type = bank->type; + unsigned long flags; + void __iomem *reg; + u8 shift; + u32 mask; + u32 val; + + /* Make sure that pin is configured as interrupt */ + reg = d->virt_base + bank->pctl_offset; + shift = pin; + if (bank_type->fld_width[PINCFG_TYPE_FUNC] * shift >= 32) { + /* 4-bit bank type with 2 con regs */ + reg += 4; + shift -= 8; + } + + shift = shift * bank_type->fld_width[PINCFG_TYPE_FUNC]; + mask = (1 << bank_type->fld_width[PINCFG_TYPE_FUNC]) - 1; + + spin_lock_irqsave(&bank->slock, flags); + + val = readl(reg); + val &= ~(mask << shift); + val |= bank->eint_func << shift; + writel(val, reg); + + spin_unlock_irqrestore(&bank->slock, flags); +} + +/* + * Functions for EINT GPIO configuration (EINT groups 1-9) + */ + +static inline void s3c64xx_gpio_irq_set_mask(struct irq_data *irqd, bool mask) +{ + struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); + struct samsung_pinctrl_drv_data *d = bank->drvdata; + unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq; + void __iomem *reg = d->virt_base + EINTMASK_REG(bank->eint_offset); + u32 val; + + val = readl(reg); + if (mask) + val |= 1 << index; + else + val &= ~(1 << index); + writel(val, reg); +} + +static void s3c64xx_gpio_irq_unmask(struct irq_data *irqd) +{ + s3c64xx_gpio_irq_set_mask(irqd, false); +} + +static void s3c64xx_gpio_irq_mask(struct irq_data *irqd) +{ + s3c64xx_gpio_irq_set_mask(irqd, true); +} + +static void s3c64xx_gpio_irq_ack(struct irq_data *irqd) +{ + struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); + struct samsung_pinctrl_drv_data *d = bank->drvdata; + unsigned char index = EINT_OFFS(bank->eint_offset) + irqd->hwirq; + void __iomem *reg = d->virt_base + EINTPEND_REG(bank->eint_offset); + + writel(1 << index, reg); +} + +static int s3c64xx_gpio_irq_set_type(struct irq_data *irqd, unsigned int type) +{ + struct samsung_pin_bank *bank = irq_data_get_irq_chip_data(irqd); + struct samsung_pinctrl_drv_data *d = bank->drvdata; + void __iomem *reg; + int trigger; + u8 shift; + u32 val; + + trigger = s3c64xx_irq_get_trigger(type); + if (trigger < 0) { + pr_err("unsupported external interrupt type\n"); + return -EINVAL; + } + + s3c64xx_irq_set_handler(irqd->irq, type); + + /* Set up interrupt trigger */ + reg = d->virt_base + EINTCON_REG(bank->eint_offset); + shift = EINT_OFFS(bank->eint_offset) + irqd->hwirq; + shift = 4 * (shift / 4); /* 4 EINTs per trigger selector */ + + val = readl(reg); + val &= ~(EINT_CON_MASK << shift); + val |= trigger << shift; + writel(val, reg); + + s3c64xx_irq_set_function(d, bank, irqd->hwirq); + + return 0; +} + +/* + * irq_chip for gpio interrupts. + */ +static struct irq_chip s3c64xx_gpio_irq_chip = { + .name = "GPIO", + .irq_unmask = s3c64xx_gpio_irq_unmask, + .irq_mask = s3c64xx_gpio_irq_mask, + .irq_ack = s3c64xx_gpio_irq_ack, + .irq_set_type = s3c64xx_gpio_irq_set_type, +}; + +static int s3c64xx_gpio_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct samsung_pin_bank *bank = h->host_data; + + if (!(bank->eint_mask & (1 << hw))) + return -EINVAL; + + irq_set_chip_and_handler(virq, + &s3c64xx_gpio_irq_chip, handle_level_irq); + irq_set_chip_data(virq, bank); + set_irq_flags(virq, IRQF_VALID); + + return 0; +} + +/* + * irq domain callbacks for external gpio interrupt controller. + */ +static const struct irq_domain_ops s3c64xx_gpio_irqd_ops = { + .map = s3c64xx_gpio_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +static void s3c64xx_eint_gpio_irq(unsigned int irq, struct irq_desc *desc) +{ + struct irq_chip *chip = irq_get_chip(irq); + struct s3c64xx_eint_gpio_data *data = irq_get_handler_data(irq); + struct samsung_pinctrl_drv_data *drvdata = data->drvdata; + + chained_irq_enter(chip, desc); + + do { + unsigned int svc; + unsigned int group; + unsigned int pin; + unsigned int virq; + + svc = readl(drvdata->virt_base + SERVICE_REG); + group = SVC_GROUP(svc); + pin = svc & SVC_NUM_MASK; + + if (!group) + break; + + /* Group 1 is used for two pin banks */ + if (group == 1) { + if (pin < 8) + group = 0; + else + pin -= 8; + } + + virq = irq_linear_revmap(data->domains[group], pin); + /* + * Something must be really wrong if an unmapped EINT + * was unmasked... + */ + BUG_ON(!virq); + + generic_handle_irq(virq); + } while (1); + + chained_irq_exit(chip, desc); +} + +/** + * s3c64xx_eint_gpio_init() - setup handling of external gpio interrupts. + * @d: driver data of samsung pinctrl driver. + */ +static int s3c64xx_eint_gpio_init(struct samsung_pinctrl_drv_data *d) +{ + struct s3c64xx_eint_gpio_data *data; + struct samsung_pin_bank *bank; + struct device *dev = d->dev; + unsigned int nr_domains; + unsigned int i; + + if (!d->irq) { + dev_err(dev, "irq number not available\n"); + return -EINVAL; + } + + nr_domains = 0; + bank = d->ctrl->pin_banks; + for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) { + unsigned int nr_eints; + unsigned int mask; + + if (bank->eint_type != EINT_TYPE_GPIO) + continue; + + mask = bank->eint_mask; + nr_eints = fls(mask); + + bank->irq_domain = irq_domain_add_linear(bank->of_node, + nr_eints, &s3c64xx_gpio_irqd_ops, bank); + if (!bank->irq_domain) { + dev_err(dev, "gpio irq domain add failed\n"); + return -ENXIO; + } + + ++nr_domains; + } + + data = devm_kzalloc(dev, sizeof(*data) + + nr_domains * sizeof(*data->domains), GFP_KERNEL); + if (!data) { + dev_err(dev, "failed to allocate handler data\n"); + return -ENOMEM; + } + data->drvdata = d; + + bank = d->ctrl->pin_banks; + nr_domains = 0; + for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) { + if (bank->eint_type != EINT_TYPE_GPIO) + continue; + + data->domains[nr_domains++] = bank->irq_domain; + } + + irq_set_chained_handler(d->irq, s3c64xx_eint_gpio_irq); + irq_set_handler_data(d->irq, data); + + return 0; +} + +/* + * Functions for configuration of EINT0 wake-up interrupts + */ + +static inline void s3c64xx_eint0_irq_set_mask(struct irq_data *irqd, bool mask) +{ + struct s3c64xx_eint0_domain_data *ddata = + irq_data_get_irq_chip_data(irqd); + struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata; + u32 val; + + val = readl(d->virt_base + EINT0MASK_REG); + if (mask) + val |= 1 << ddata->eints[irqd->hwirq]; + else + val &= ~(1 << ddata->eints[irqd->hwirq]); + writel(val, d->virt_base + EINT0MASK_REG); +} + +static void s3c64xx_eint0_irq_unmask(struct irq_data *irqd) +{ + s3c64xx_eint0_irq_set_mask(irqd, false); +} + +static void s3c64xx_eint0_irq_mask(struct irq_data *irqd) +{ + s3c64xx_eint0_irq_set_mask(irqd, true); +} + +static void s3c64xx_eint0_irq_ack(struct irq_data *irqd) +{ + struct s3c64xx_eint0_domain_data *ddata = + irq_data_get_irq_chip_data(irqd); + struct samsung_pinctrl_drv_data *d = ddata->bank->drvdata; + + writel(1 << ddata->eints[irqd->hwirq], + d->virt_base + EINT0PEND_REG); +} + +static int s3c64xx_eint0_irq_set_type(struct irq_data *irqd, unsigned int type) +{ + struct s3c64xx_eint0_domain_data *ddata = + irq_data_get_irq_chip_data(irqd); + struct samsung_pin_bank *bank = ddata->bank; + struct samsung_pinctrl_drv_data *d = bank->drvdata; + void __iomem *reg; + int trigger; + u8 shift; + u32 val; + + trigger = s3c64xx_irq_get_trigger(type); + if (trigger < 0) { + pr_err("unsupported external interrupt type\n"); + return -EINVAL; + } + + s3c64xx_irq_set_handler(irqd->irq, type); + + /* Set up interrupt trigger */ + reg = d->virt_base + EINT0CON0_REG; + shift = ddata->eints[irqd->hwirq]; + if (shift >= EINT_MAX_PER_REG) { + reg += 4; + shift -= EINT_MAX_PER_REG; + } + shift = EINT_CON_LEN * (shift / 2); + + val = readl(reg); + val &= ~(EINT_CON_MASK << shift); + val |= trigger << shift; + writel(val, reg); + + s3c64xx_irq_set_function(d, bank, irqd->hwirq); + + return 0; +} + +/* + * irq_chip for wakeup interrupts + */ +static struct irq_chip s3c64xx_eint0_irq_chip = { + .name = "EINT0", + .irq_unmask = s3c64xx_eint0_irq_unmask, + .irq_mask = s3c64xx_eint0_irq_mask, + .irq_ack = s3c64xx_eint0_irq_ack, + .irq_set_type = s3c64xx_eint0_irq_set_type, +}; + +static inline void s3c64xx_irq_demux_eint(unsigned int irq, + struct irq_desc *desc, u32 range) +{ + struct irq_chip *chip = irq_get_chip(irq); + struct s3c64xx_eint0_data *data = irq_get_handler_data(irq); + struct samsung_pinctrl_drv_data *drvdata = data->drvdata; + unsigned int pend, mask; + + chained_irq_enter(chip, desc); + + pend = readl(drvdata->virt_base + EINT0PEND_REG); + mask = readl(drvdata->virt_base + EINT0MASK_REG); + + pend = pend & range & ~mask; + pend &= range; + + while (pend) { + unsigned int virq; + + irq = fls(pend) - 1; + pend &= ~(1 << irq); + + virq = irq_linear_revmap(data->domains[irq], data->pins[irq]); + /* + * Something must be really wrong if an unmapped EINT + * was unmasked... + */ + BUG_ON(!virq); + + generic_handle_irq(virq); + } + + chained_irq_exit(chip, desc); +} + +static void s3c64xx_demux_eint0_3(unsigned int irq, struct irq_desc *desc) +{ + s3c64xx_irq_demux_eint(irq, desc, 0xf); +} + +static void s3c64xx_demux_eint4_11(unsigned int irq, struct irq_desc *desc) +{ + s3c64xx_irq_demux_eint(irq, desc, 0xff0); +} + +static void s3c64xx_demux_eint12_19(unsigned int irq, struct irq_desc *desc) +{ + s3c64xx_irq_demux_eint(irq, desc, 0xff000); +} + +static void s3c64xx_demux_eint20_27(unsigned int irq, struct irq_desc *desc) +{ + s3c64xx_irq_demux_eint(irq, desc, 0xff00000); +} + +static irq_flow_handler_t s3c64xx_eint0_handlers[NUM_EINT0_IRQ] = { + s3c64xx_demux_eint0_3, + s3c64xx_demux_eint4_11, + s3c64xx_demux_eint12_19, + s3c64xx_demux_eint20_27, +}; + +static int s3c64xx_eint0_irq_map(struct irq_domain *h, unsigned int virq, + irq_hw_number_t hw) +{ + struct s3c64xx_eint0_domain_data *ddata = h->host_data; + struct samsung_pin_bank *bank = ddata->bank; + + if (!(bank->eint_mask & (1 << hw))) + return -EINVAL; + + irq_set_chip_and_handler(virq, + &s3c64xx_eint0_irq_chip, handle_level_irq); + irq_set_chip_data(virq, ddata); + set_irq_flags(virq, IRQF_VALID); + + return 0; +} + +/* + * irq domain callbacks for external wakeup interrupt controller. + */ +static const struct irq_domain_ops s3c64xx_eint0_irqd_ops = { + .map = s3c64xx_eint0_irq_map, + .xlate = irq_domain_xlate_twocell, +}; + +/* list of external wakeup controllers supported */ +static const struct of_device_id s3c64xx_eint0_irq_ids[] = { + { .compatible = "samsung,s3c64xx-wakeup-eint", }, + { } +}; + +/** + * s3c64xx_eint_eint0_init() - setup handling of external wakeup interrupts. + * @d: driver data of samsung pinctrl driver. + */ +static int s3c64xx_eint_eint0_init(struct samsung_pinctrl_drv_data *d) +{ + struct device *dev = d->dev; + struct device_node *eint0_np = NULL; + struct device_node *np; + struct samsung_pin_bank *bank; + struct s3c64xx_eint0_data *data; + unsigned int i; + + for_each_child_of_node(dev->of_node, np) { + if (of_match_node(s3c64xx_eint0_irq_ids, np)) { + eint0_np = np; + break; + } + } + if (!eint0_np) + return -ENODEV; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) { + dev_err(dev, "could not allocate memory for wkup eint data\n"); + return -ENOMEM; + } + data->drvdata = d; + + for (i = 0; i < NUM_EINT0_IRQ; ++i) { + unsigned int irq; + + irq = irq_of_parse_and_map(eint0_np, i); + if (!irq) { + dev_err(dev, "failed to get wakeup EINT IRQ %d\n", i); + return -ENXIO; + } + + irq_set_chained_handler(irq, s3c64xx_eint0_handlers[i]); + irq_set_handler_data(irq, data); + } + + bank = d->ctrl->pin_banks; + for (i = 0; i < d->ctrl->nr_banks; ++i, ++bank) { + struct s3c64xx_eint0_domain_data *ddata; + unsigned int nr_eints; + unsigned int mask; + unsigned int irq; + unsigned int pin; + + if (bank->eint_type != EINT_TYPE_WKUP) + continue; + + mask = bank->eint_mask; + nr_eints = fls(mask); + + ddata = devm_kzalloc(dev, + sizeof(*ddata) + nr_eints, GFP_KERNEL); + if (!ddata) { + dev_err(dev, "failed to allocate domain data\n"); + return -ENOMEM; + } + ddata->bank = bank; + + bank->irq_domain = irq_domain_add_linear(bank->of_node, + nr_eints, &s3c64xx_eint0_irqd_ops, ddata); + if (!bank->irq_domain) { + dev_err(dev, "wkup irq domain add failed\n"); + return -ENXIO; + } + + irq = bank->eint_offset; + mask = bank->eint_mask; + for (pin = 0; mask; ++pin, mask >>= 1) { + if (!(mask & 1)) + continue; + data->domains[irq] = bank->irq_domain; + data->pins[irq] = pin; + ddata->eints[pin] = irq; + ++irq; + } + } + + return 0; +} + +/* pin banks of s3c64xx pin-controller 0 */ +static struct samsung_pin_bank s3c64xx_pin_banks0[] = { + PIN_BANK_4BIT_EINTG(8, 0x000, "gpa", 0), + PIN_BANK_4BIT_EINTG(7, 0x020, "gpb", 8), + PIN_BANK_4BIT_EINTG(8, 0x040, "gpc", 16), + PIN_BANK_4BIT_EINTG(5, 0x060, "gpd", 32), + PIN_BANK_4BIT(5, 0x080, "gpe"), + PIN_BANK_2BIT_EINTG(16, 0x0a0, "gpf", 48, 0x3fff), + PIN_BANK_4BIT_EINTG(7, 0x0c0, "gpg", 64), + PIN_BANK_4BIT2_EINTG(10, 0x0e0, "gph", 80), + PIN_BANK_2BIT(16, 0x100, "gpi"), + PIN_BANK_2BIT(12, 0x120, "gpj"), + PIN_BANK_4BIT2_ALIVE(16, 0x800, "gpk"), + PIN_BANK_4BIT2_EINTW(15, 0x810, "gpl", 16, 0x7f00), + PIN_BANK_4BIT_EINTW(6, 0x820, "gpm", 23, 0x1f), + PIN_BANK_2BIT_EINTW(16, 0x830, "gpn", 0), + PIN_BANK_2BIT_EINTG(16, 0x140, "gpo", 96, 0xffff), + PIN_BANK_2BIT_EINTG(15, 0x160, "gpp", 112, 0x7fff), + PIN_BANK_2BIT_EINTG(9, 0x180, "gpq", 128, 0x1ff), +}; + +/* + * Samsung pinctrl driver data for S3C64xx SoC. S3C64xx SoC includes + * one gpio/pin-mux/pinconfig controller. + */ +struct samsung_pin_ctrl s3c64xx_pin_ctrl[] = { + { + /* pin-controller instance 1 data */ + .pin_banks = s3c64xx_pin_banks0, + .nr_banks = ARRAY_SIZE(s3c64xx_pin_banks0), + .eint_gpio_init = s3c64xx_eint_gpio_init, + .eint_wkup_init = s3c64xx_eint_eint0_init, + .label = "S3C64xx-GPIO", + }, +}; diff --git a/drivers/pinctrl/pinctrl-samsung.c b/drivers/pinctrl/pinctrl-samsung.c index 8b15c66..4f54faf 100644 --- a/drivers/pinctrl/pinctrl-samsung.c +++ b/drivers/pinctrl/pinctrl-samsung.c @@ -971,6 +971,10 @@ static const struct of_device_id samsung_pinctrl_dt_match[] = { { .compatible = "samsung,exynos4x12-pinctrl", .data = (void *)exynos4x12_pin_ctrl }, #endif +#ifdef CONFIG_PINCTRL_S3C64XX + { .compatible = "samsung,s3c64xx-pinctrl", + .data = s3c64xx_pin_ctrl }, +#endif {}, }; MODULE_DEVICE_TABLE(of, samsung_pinctrl_dt_match); diff --git a/drivers/pinctrl/pinctrl-samsung.h b/drivers/pinctrl/pinctrl-samsung.h index 9efeee8..45f27b4 100644 --- a/drivers/pinctrl/pinctrl-samsung.h +++ b/drivers/pinctrl/pinctrl-samsung.h @@ -117,7 +117,9 @@ struct samsung_pin_bank_type { * @pctl_offset: starting offset of the pin-bank registers. * @pin_base: starting pin number of the bank. * @nr_pins: number of pins included in this bank. + * @eint_func: function to set in CON register to configure pin as EINT. * @eint_type: type of the external interrupt supported by the bank. + * @eint_mask: bit mask of pins which support EINT function. * @name: name to be prefixed for each pin in this pin bank. * @of_node: OF node of the bank. * @drvdata: link to controller driver data @@ -131,7 +133,9 @@ struct samsung_pin_bank { u32 pctl_offset; u32 pin_base; u8 nr_pins; + u8 eint_func; enum eint_type eint_type; + u32 eint_mask; u32 eint_offset; char *name; struct device_node *of_node; @@ -240,5 +244,6 @@ struct samsung_pmx_func { /* list of all exported SoC specific data */ extern struct samsung_pin_ctrl exynos4210_pin_ctrl[]; extern struct samsung_pin_ctrl exynos4x12_pin_ctrl[]; +extern struct samsung_pin_ctrl s3c64xx_pin_ctrl[]; #endif /* __PINCTRL_SAMSUNG_H */ |
