From 3c6e8d05d60d8106b5cdc730cf220b2a4b521b66 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 16 Sep 2016 13:48:12 +0200 Subject: mfd/gpio: Move HTC GPIO driver to GPIO subsystem The HTC GPIO driver is a pure GPIO driver and I just can not see what it is doing inside MFD. Let's just move it to GPIO and take this opportunity to move the platform data to Cc: arm@kernel.org Cc: Russell King Acked-by: Lee Jones Acked-by: Arnd Bergmann Signed-off-by: Linus Walleij --- drivers/gpio/Kconfig | 8 + drivers/gpio/Makefile | 1 + drivers/gpio/gpio-htc-egpio.c | 440 ++++++++++++++++++++++++++++++++++++++++++ drivers/mfd/Kconfig | 8 - drivers/mfd/Makefile | 1 - drivers/mfd/htc-egpio.c | 440 ------------------------------------------ 6 files changed, 449 insertions(+), 449 deletions(-) create mode 100644 drivers/gpio/gpio-htc-egpio.c delete mode 100644 drivers/mfd/htc-egpio.c (limited to 'drivers') diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 98dd47a..03be200 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -848,6 +848,14 @@ config GPIO_DLN2 This driver can also be built as a module. If so, the module will be called gpio-dln2. +config HTC_EGPIO + bool "HTC EGPIO support" + depends on GPIOLIB && ARM + help + This driver supports the CPLD egpio chip present on + several HTC phones. It provides basic support for input + pins, output pins, and irqs. + config GPIO_JANZ_TTL tristate "Janz VMOD-TTL Digital IO Module" depends on MFD_JANZ_CMODIO diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 2a035ed..32ebc07 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -45,6 +45,7 @@ obj-$(CONFIG_GPIO_ETRAXFS) += gpio-etraxfs.o obj-$(CONFIG_GPIO_F7188X) += gpio-f7188x.o obj-$(CONFIG_GPIO_GE_FPGA) += gpio-ge.o obj-$(CONFIG_GPIO_GRGPIO) += gpio-grgpio.o +obj-$(CONFIG_HTC_EGPIO) += gpio-htc-egpio.o obj-$(CONFIG_GPIO_ICH) += gpio-ich.o obj-$(CONFIG_GPIO_IOP) += gpio-iop.o obj-$(CONFIG_GPIO_IT87) += gpio-it87.o diff --git a/drivers/gpio/gpio-htc-egpio.c b/drivers/gpio/gpio-htc-egpio.c new file mode 100644 index 0000000..0b4df60 --- /dev/null +++ b/drivers/gpio/gpio-htc-egpio.c @@ -0,0 +1,440 @@ +/* + * Support for the GPIO/IRQ expander chips present on several HTC phones. + * These are implemented in CPLD chips present on the board. + * + * Copyright (c) 2007 Kevin O'Connor + * Copyright (c) 2007 Philipp Zabel + * + * This file may be distributed under the terms of the GNU GPL license. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct egpio_chip { + int reg_start; + int cached_values; + unsigned long is_out; + struct device *dev; + struct gpio_chip chip; +}; + +struct egpio_info { + spinlock_t lock; + + /* iomem info */ + void __iomem *base_addr; + int bus_shift; /* byte shift */ + int reg_shift; /* bit shift */ + int reg_mask; + + /* irq info */ + int ack_register; + int ack_write; + u16 irqs_enabled; + uint irq_start; + int nirqs; + uint chained_irq; + + /* egpio info */ + struct egpio_chip *chip; + int nchips; +}; + +static inline void egpio_writew(u16 value, struct egpio_info *ei, int reg) +{ + writew(value, ei->base_addr + (reg << ei->bus_shift)); +} + +static inline u16 egpio_readw(struct egpio_info *ei, int reg) +{ + return readw(ei->base_addr + (reg << ei->bus_shift)); +} + +/* + * IRQs + */ + +static inline void ack_irqs(struct egpio_info *ei) +{ + egpio_writew(ei->ack_write, ei, ei->ack_register); + pr_debug("EGPIO ack - write %x to base+%x\n", + ei->ack_write, ei->ack_register << ei->bus_shift); +} + +static void egpio_ack(struct irq_data *data) +{ +} + +/* There does not appear to be a way to proactively mask interrupts + * on the egpio chip itself. So, we simply ignore interrupts that + * aren't desired. */ +static void egpio_mask(struct irq_data *data) +{ + struct egpio_info *ei = irq_data_get_irq_chip_data(data); + ei->irqs_enabled &= ~(1 << (data->irq - ei->irq_start)); + pr_debug("EGPIO mask %d %04x\n", data->irq, ei->irqs_enabled); +} + +static void egpio_unmask(struct irq_data *data) +{ + struct egpio_info *ei = irq_data_get_irq_chip_data(data); + ei->irqs_enabled |= 1 << (data->irq - ei->irq_start); + pr_debug("EGPIO unmask %d %04x\n", data->irq, ei->irqs_enabled); +} + +static struct irq_chip egpio_muxed_chip = { + .name = "htc-egpio", + .irq_ack = egpio_ack, + .irq_mask = egpio_mask, + .irq_unmask = egpio_unmask, +}; + +static void egpio_handler(struct irq_desc *desc) +{ + struct egpio_info *ei = irq_desc_get_handler_data(desc); + int irqpin; + + /* Read current pins. */ + unsigned long readval = egpio_readw(ei, ei->ack_register); + pr_debug("IRQ reg: %x\n", (unsigned int)readval); + /* Ack/unmask interrupts. */ + ack_irqs(ei); + /* Process all set pins. */ + readval &= ei->irqs_enabled; + for_each_set_bit(irqpin, &readval, ei->nirqs) { + /* Run irq handler */ + pr_debug("got IRQ %d\n", irqpin); + generic_handle_irq(ei->irq_start + irqpin); + } +} + +int htc_egpio_get_wakeup_irq(struct device *dev) +{ + struct egpio_info *ei = dev_get_drvdata(dev); + + /* Read current pins. */ + u16 readval = egpio_readw(ei, ei->ack_register); + /* Ack/unmask interrupts. */ + ack_irqs(ei); + /* Return first set pin. */ + readval &= ei->irqs_enabled; + return ei->irq_start + ffs(readval) - 1; +} +EXPORT_SYMBOL(htc_egpio_get_wakeup_irq); + +static inline int egpio_pos(struct egpio_info *ei, int bit) +{ + return bit >> ei->reg_shift; +} + +static inline int egpio_bit(struct egpio_info *ei, int bit) +{ + return 1 << (bit & ((1 << ei->reg_shift)-1)); +} + +/* + * Input pins + */ + +static int egpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct egpio_chip *egpio; + struct egpio_info *ei; + unsigned bit; + int reg; + int value; + + pr_debug("egpio_get_value(%d)\n", chip->base + offset); + + egpio = gpiochip_get_data(chip); + ei = dev_get_drvdata(egpio->dev); + bit = egpio_bit(ei, offset); + reg = egpio->reg_start + egpio_pos(ei, offset); + + value = egpio_readw(ei, reg); + pr_debug("readw(%p + %x) = %x\n", + ei->base_addr, reg << ei->bus_shift, value); + return !!(value & bit); +} + +static int egpio_direction_input(struct gpio_chip *chip, unsigned offset) +{ + struct egpio_chip *egpio; + + egpio = gpiochip_get_data(chip); + return test_bit(offset, &egpio->is_out) ? -EINVAL : 0; +} + + +/* + * Output pins + */ + +static void egpio_set(struct gpio_chip *chip, unsigned offset, int value) +{ + unsigned long flag; + struct egpio_chip *egpio; + struct egpio_info *ei; + unsigned bit; + int pos; + int reg; + int shift; + + pr_debug("egpio_set(%s, %d(%d), %d)\n", + chip->label, offset, offset+chip->base, value); + + egpio = gpiochip_get_data(chip); + ei = dev_get_drvdata(egpio->dev); + bit = egpio_bit(ei, offset); + pos = egpio_pos(ei, offset); + reg = egpio->reg_start + pos; + shift = pos << ei->reg_shift; + + pr_debug("egpio %s: reg %d = 0x%04x\n", value ? "set" : "clear", + reg, (egpio->cached_values >> shift) & ei->reg_mask); + + spin_lock_irqsave(&ei->lock, flag); + if (value) + egpio->cached_values |= (1 << offset); + else + egpio->cached_values &= ~(1 << offset); + egpio_writew((egpio->cached_values >> shift) & ei->reg_mask, ei, reg); + spin_unlock_irqrestore(&ei->lock, flag); +} + +static int egpio_direction_output(struct gpio_chip *chip, + unsigned offset, int value) +{ + struct egpio_chip *egpio; + + egpio = gpiochip_get_data(chip); + if (test_bit(offset, &egpio->is_out)) { + egpio_set(chip, offset, value); + return 0; + } else { + return -EINVAL; + } +} + +static void egpio_write_cache(struct egpio_info *ei) +{ + int i; + struct egpio_chip *egpio; + int shift; + + for (i = 0; i < ei->nchips; i++) { + egpio = &(ei->chip[i]); + if (!egpio->is_out) + continue; + + for (shift = 0; shift < egpio->chip.ngpio; + shift += (1<reg_shift)) { + + int reg = egpio->reg_start + egpio_pos(ei, shift); + + if (!((egpio->is_out >> shift) & ei->reg_mask)) + continue; + + pr_debug("EGPIO: setting %x to %x, was %x\n", reg, + (egpio->cached_values >> shift) & ei->reg_mask, + egpio_readw(ei, reg)); + + egpio_writew((egpio->cached_values >> shift) + & ei->reg_mask, ei, reg); + } + } +} + + +/* + * Setup + */ + +static int __init egpio_probe(struct platform_device *pdev) +{ + struct htc_egpio_platform_data *pdata = dev_get_platdata(&pdev->dev); + struct resource *res; + struct egpio_info *ei; + struct gpio_chip *chip; + unsigned int irq, irq_end; + int i; + int ret; + + /* Initialize ei data structure. */ + ei = devm_kzalloc(&pdev->dev, sizeof(*ei), GFP_KERNEL); + if (!ei) + return -ENOMEM; + + spin_lock_init(&ei->lock); + + /* Find chained irq */ + ret = -EINVAL; + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); + if (res) + ei->chained_irq = res->start; + + /* Map egpio chip into virtual address space. */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + goto fail; + ei->base_addr = devm_ioremap_nocache(&pdev->dev, res->start, + resource_size(res)); + if (!ei->base_addr) + goto fail; + pr_debug("EGPIO phys=%08x virt=%p\n", (u32)res->start, ei->base_addr); + + if ((pdata->bus_width != 16) && (pdata->bus_width != 32)) + goto fail; + ei->bus_shift = fls(pdata->bus_width - 1) - 3; + pr_debug("bus_shift = %d\n", ei->bus_shift); + + if ((pdata->reg_width != 8) && (pdata->reg_width != 16)) + goto fail; + ei->reg_shift = fls(pdata->reg_width - 1); + pr_debug("reg_shift = %d\n", ei->reg_shift); + + ei->reg_mask = (1 << pdata->reg_width) - 1; + + platform_set_drvdata(pdev, ei); + + ei->nchips = pdata->num_chips; + ei->chip = devm_kzalloc(&pdev->dev, + sizeof(struct egpio_chip) * ei->nchips, + GFP_KERNEL); + if (!ei->chip) { + ret = -ENOMEM; + goto fail; + } + for (i = 0; i < ei->nchips; i++) { + ei->chip[i].reg_start = pdata->chip[i].reg_start; + ei->chip[i].cached_values = pdata->chip[i].initial_values; + ei->chip[i].is_out = pdata->chip[i].direction; + ei->chip[i].dev = &(pdev->dev); + chip = &(ei->chip[i].chip); + chip->label = "htc-egpio"; + chip->parent = &pdev->dev; + chip->owner = THIS_MODULE; + chip->get = egpio_get; + chip->set = egpio_set; + chip->direction_input = egpio_direction_input; + chip->direction_output = egpio_direction_output; + chip->base = pdata->chip[i].gpio_base; + chip->ngpio = pdata->chip[i].num_gpios; + + gpiochip_add_data(chip, &ei->chip[i]); + } + + /* Set initial pin values */ + egpio_write_cache(ei); + + ei->irq_start = pdata->irq_base; + ei->nirqs = pdata->num_irqs; + ei->ack_register = pdata->ack_register; + + if (ei->chained_irq) { + /* Setup irq handlers */ + ei->ack_write = 0xFFFF; + if (pdata->invert_acks) + ei->ack_write = 0; + irq_end = ei->irq_start + ei->nirqs; + for (irq = ei->irq_start; irq < irq_end; irq++) { + irq_set_chip_and_handler(irq, &egpio_muxed_chip, + handle_simple_irq); + irq_set_chip_data(irq, ei); + irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); + } + irq_set_irq_type(ei->chained_irq, IRQ_TYPE_EDGE_RISING); + irq_set_chained_handler_and_data(ei->chained_irq, + egpio_handler, ei); + ack_irqs(ei); + + device_init_wakeup(&pdev->dev, 1); + } + + return 0; + +fail: + printk(KERN_ERR "EGPIO failed to setup\n"); + return ret; +} + +static int __exit egpio_remove(struct platform_device *pdev) +{ + struct egpio_info *ei = platform_get_drvdata(pdev); + unsigned int irq, irq_end; + + if (ei->chained_irq) { + irq_end = ei->irq_start + ei->nirqs; + for (irq = ei->irq_start; irq < irq_end; irq++) { + irq_set_chip_and_handler(irq, NULL, NULL); + irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); + } + irq_set_chained_handler(ei->chained_irq, NULL); + device_init_wakeup(&pdev->dev, 0); + } + + return 0; +} + +#ifdef CONFIG_PM +static int egpio_suspend(struct platform_device *pdev, pm_message_t state) +{ + struct egpio_info *ei = platform_get_drvdata(pdev); + + if (ei->chained_irq && device_may_wakeup(&pdev->dev)) + enable_irq_wake(ei->chained_irq); + return 0; +} + +static int egpio_resume(struct platform_device *pdev) +{ + struct egpio_info *ei = platform_get_drvdata(pdev); + + if (ei->chained_irq && device_may_wakeup(&pdev->dev)) + disable_irq_wake(ei->chained_irq); + + /* Update registers from the cache, in case + the CPLD was powered off during suspend */ + egpio_write_cache(ei); + return 0; +} +#else +#define egpio_suspend NULL +#define egpio_resume NULL +#endif + + +static struct platform_driver egpio_driver = { + .driver = { + .name = "htc-egpio", + }, + .remove = __exit_p(egpio_remove), + .suspend = egpio_suspend, + .resume = egpio_resume, +}; + +static int __init egpio_init(void) +{ + return platform_driver_probe(&egpio_driver, egpio_probe); +} + +static void __exit egpio_exit(void) +{ + platform_driver_unregister(&egpio_driver); +} + +/* start early for dependencies */ +subsys_initcall(egpio_init); +module_exit(egpio_exit) + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Kevin O'Connor "); diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig index 2d1fb64..8634d60 100644 --- a/drivers/mfd/Kconfig +++ b/drivers/mfd/Kconfig @@ -340,14 +340,6 @@ config MFD_HI655X_PMIC help Select this option to enable Hisilicon hi655x series pmic driver. -config HTC_EGPIO - bool "HTC EGPIO support" - depends on GPIOLIB && ARM - help - This driver supports the CPLD egpio chip present on - several HTC phones. It provides basic support for input - pins, output pins, and irqs. - config HTC_PASIC3 tristate "HTC PASIC3 LED/DS1WM chip support" select MFD_CORE diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile index 2ba3ba3..a5f1bf1 100644 --- a/drivers/mfd/Makefile +++ b/drivers/mfd/Makefile @@ -18,7 +18,6 @@ rtsx_pci-objs := rtsx_pcr.o rts5209.o rts5229.o rtl8411.o rts5227.o rts5249.o obj-$(CONFIG_MFD_RTSX_PCI) += rtsx_pci.o obj-$(CONFIG_MFD_RTSX_USB) += rtsx_usb.o -obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o obj-$(CONFIG_HTC_I2CPLD) += htc-i2cpld.o diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c deleted file mode 100644 index 513cfc5..0000000 --- a/drivers/mfd/htc-egpio.c +++ /dev/null @@ -1,440 +0,0 @@ -/* - * Support for the GPIO/IRQ expander chips present on several HTC phones. - * These are implemented in CPLD chips present on the board. - * - * Copyright (c) 2007 Kevin O'Connor - * Copyright (c) 2007 Philipp Zabel - * - * This file may be distributed under the terms of the GNU GPL license. - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -struct egpio_chip { - int reg_start; - int cached_values; - unsigned long is_out; - struct device *dev; - struct gpio_chip chip; -}; - -struct egpio_info { - spinlock_t lock; - - /* iomem info */ - void __iomem *base_addr; - int bus_shift; /* byte shift */ - int reg_shift; /* bit shift */ - int reg_mask; - - /* irq info */ - int ack_register; - int ack_write; - u16 irqs_enabled; - uint irq_start; - int nirqs; - uint chained_irq; - - /* egpio info */ - struct egpio_chip *chip; - int nchips; -}; - -static inline void egpio_writew(u16 value, struct egpio_info *ei, int reg) -{ - writew(value, ei->base_addr + (reg << ei->bus_shift)); -} - -static inline u16 egpio_readw(struct egpio_info *ei, int reg) -{ - return readw(ei->base_addr + (reg << ei->bus_shift)); -} - -/* - * IRQs - */ - -static inline void ack_irqs(struct egpio_info *ei) -{ - egpio_writew(ei->ack_write, ei, ei->ack_register); - pr_debug("EGPIO ack - write %x to base+%x\n", - ei->ack_write, ei->ack_register << ei->bus_shift); -} - -static void egpio_ack(struct irq_data *data) -{ -} - -/* There does not appear to be a way to proactively mask interrupts - * on the egpio chip itself. So, we simply ignore interrupts that - * aren't desired. */ -static void egpio_mask(struct irq_data *data) -{ - struct egpio_info *ei = irq_data_get_irq_chip_data(data); - ei->irqs_enabled &= ~(1 << (data->irq - ei->irq_start)); - pr_debug("EGPIO mask %d %04x\n", data->irq, ei->irqs_enabled); -} - -static void egpio_unmask(struct irq_data *data) -{ - struct egpio_info *ei = irq_data_get_irq_chip_data(data); - ei->irqs_enabled |= 1 << (data->irq - ei->irq_start); - pr_debug("EGPIO unmask %d %04x\n", data->irq, ei->irqs_enabled); -} - -static struct irq_chip egpio_muxed_chip = { - .name = "htc-egpio", - .irq_ack = egpio_ack, - .irq_mask = egpio_mask, - .irq_unmask = egpio_unmask, -}; - -static void egpio_handler(struct irq_desc *desc) -{ - struct egpio_info *ei = irq_desc_get_handler_data(desc); - int irqpin; - - /* Read current pins. */ - unsigned long readval = egpio_readw(ei, ei->ack_register); - pr_debug("IRQ reg: %x\n", (unsigned int)readval); - /* Ack/unmask interrupts. */ - ack_irqs(ei); - /* Process all set pins. */ - readval &= ei->irqs_enabled; - for_each_set_bit(irqpin, &readval, ei->nirqs) { - /* Run irq handler */ - pr_debug("got IRQ %d\n", irqpin); - generic_handle_irq(ei->irq_start + irqpin); - } -} - -int htc_egpio_get_wakeup_irq(struct device *dev) -{ - struct egpio_info *ei = dev_get_drvdata(dev); - - /* Read current pins. */ - u16 readval = egpio_readw(ei, ei->ack_register); - /* Ack/unmask interrupts. */ - ack_irqs(ei); - /* Return first set pin. */ - readval &= ei->irqs_enabled; - return ei->irq_start + ffs(readval) - 1; -} -EXPORT_SYMBOL(htc_egpio_get_wakeup_irq); - -static inline int egpio_pos(struct egpio_info *ei, int bit) -{ - return bit >> ei->reg_shift; -} - -static inline int egpio_bit(struct egpio_info *ei, int bit) -{ - return 1 << (bit & ((1 << ei->reg_shift)-1)); -} - -/* - * Input pins - */ - -static int egpio_get(struct gpio_chip *chip, unsigned offset) -{ - struct egpio_chip *egpio; - struct egpio_info *ei; - unsigned bit; - int reg; - int value; - - pr_debug("egpio_get_value(%d)\n", chip->base + offset); - - egpio = gpiochip_get_data(chip); - ei = dev_get_drvdata(egpio->dev); - bit = egpio_bit(ei, offset); - reg = egpio->reg_start + egpio_pos(ei, offset); - - value = egpio_readw(ei, reg); - pr_debug("readw(%p + %x) = %x\n", - ei->base_addr, reg << ei->bus_shift, value); - return !!(value & bit); -} - -static int egpio_direction_input(struct gpio_chip *chip, unsigned offset) -{ - struct egpio_chip *egpio; - - egpio = gpiochip_get_data(chip); - return test_bit(offset, &egpio->is_out) ? -EINVAL : 0; -} - - -/* - * Output pins - */ - -static void egpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - unsigned long flag; - struct egpio_chip *egpio; - struct egpio_info *ei; - unsigned bit; - int pos; - int reg; - int shift; - - pr_debug("egpio_set(%s, %d(%d), %d)\n", - chip->label, offset, offset+chip->base, value); - - egpio = gpiochip_get_data(chip); - ei = dev_get_drvdata(egpio->dev); - bit = egpio_bit(ei, offset); - pos = egpio_pos(ei, offset); - reg = egpio->reg_start + pos; - shift = pos << ei->reg_shift; - - pr_debug("egpio %s: reg %d = 0x%04x\n", value ? "set" : "clear", - reg, (egpio->cached_values >> shift) & ei->reg_mask); - - spin_lock_irqsave(&ei->lock, flag); - if (value) - egpio->cached_values |= (1 << offset); - else - egpio->cached_values &= ~(1 << offset); - egpio_writew((egpio->cached_values >> shift) & ei->reg_mask, ei, reg); - spin_unlock_irqrestore(&ei->lock, flag); -} - -static int egpio_direction_output(struct gpio_chip *chip, - unsigned offset, int value) -{ - struct egpio_chip *egpio; - - egpio = gpiochip_get_data(chip); - if (test_bit(offset, &egpio->is_out)) { - egpio_set(chip, offset, value); - return 0; - } else { - return -EINVAL; - } -} - -static void egpio_write_cache(struct egpio_info *ei) -{ - int i; - struct egpio_chip *egpio; - int shift; - - for (i = 0; i < ei->nchips; i++) { - egpio = &(ei->chip[i]); - if (!egpio->is_out) - continue; - - for (shift = 0; shift < egpio->chip.ngpio; - shift += (1<reg_shift)) { - - int reg = egpio->reg_start + egpio_pos(ei, shift); - - if (!((egpio->is_out >> shift) & ei->reg_mask)) - continue; - - pr_debug("EGPIO: setting %x to %x, was %x\n", reg, - (egpio->cached_values >> shift) & ei->reg_mask, - egpio_readw(ei, reg)); - - egpio_writew((egpio->cached_values >> shift) - & ei->reg_mask, ei, reg); - } - } -} - - -/* - * Setup - */ - -static int __init egpio_probe(struct platform_device *pdev) -{ - struct htc_egpio_platform_data *pdata = dev_get_platdata(&pdev->dev); - struct resource *res; - struct egpio_info *ei; - struct gpio_chip *chip; - unsigned int irq, irq_end; - int i; - int ret; - - /* Initialize ei data structure. */ - ei = devm_kzalloc(&pdev->dev, sizeof(*ei), GFP_KERNEL); - if (!ei) - return -ENOMEM; - - spin_lock_init(&ei->lock); - - /* Find chained irq */ - ret = -EINVAL; - res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); - if (res) - ei->chained_irq = res->start; - - /* Map egpio chip into virtual address space. */ - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) - goto fail; - ei->base_addr = devm_ioremap_nocache(&pdev->dev, res->start, - resource_size(res)); - if (!ei->base_addr) - goto fail; - pr_debug("EGPIO phys=%08x virt=%p\n", (u32)res->start, ei->base_addr); - - if ((pdata->bus_width != 16) && (pdata->bus_width != 32)) - goto fail; - ei->bus_shift = fls(pdata->bus_width - 1) - 3; - pr_debug("bus_shift = %d\n", ei->bus_shift); - - if ((pdata->reg_width != 8) && (pdata->reg_width != 16)) - goto fail; - ei->reg_shift = fls(pdata->reg_width - 1); - pr_debug("reg_shift = %d\n", ei->reg_shift); - - ei->reg_mask = (1 << pdata->reg_width) - 1; - - platform_set_drvdata(pdev, ei); - - ei->nchips = pdata->num_chips; - ei->chip = devm_kzalloc(&pdev->dev, - sizeof(struct egpio_chip) * ei->nchips, - GFP_KERNEL); - if (!ei->chip) { - ret = -ENOMEM; - goto fail; - } - for (i = 0; i < ei->nchips; i++) { - ei->chip[i].reg_start = pdata->chip[i].reg_start; - ei->chip[i].cached_values = pdata->chip[i].initial_values; - ei->chip[i].is_out = pdata->chip[i].direction; - ei->chip[i].dev = &(pdev->dev); - chip = &(ei->chip[i].chip); - chip->label = "htc-egpio"; - chip->parent = &pdev->dev; - chip->owner = THIS_MODULE; - chip->get = egpio_get; - chip->set = egpio_set; - chip->direction_input = egpio_direction_input; - chip->direction_output = egpio_direction_output; - chip->base = pdata->chip[i].gpio_base; - chip->ngpio = pdata->chip[i].num_gpios; - - gpiochip_add_data(chip, &ei->chip[i]); - } - - /* Set initial pin values */ - egpio_write_cache(ei); - - ei->irq_start = pdata->irq_base; - ei->nirqs = pdata->num_irqs; - ei->ack_register = pdata->ack_register; - - if (ei->chained_irq) { - /* Setup irq handlers */ - ei->ack_write = 0xFFFF; - if (pdata->invert_acks) - ei->ack_write = 0; - irq_end = ei->irq_start + ei->nirqs; - for (irq = ei->irq_start; irq < irq_end; irq++) { - irq_set_chip_and_handler(irq, &egpio_muxed_chip, - handle_simple_irq); - irq_set_chip_data(irq, ei); - irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); - } - irq_set_irq_type(ei->chained_irq, IRQ_TYPE_EDGE_RISING); - irq_set_chained_handler_and_data(ei->chained_irq, - egpio_handler, ei); - ack_irqs(ei); - - device_init_wakeup(&pdev->dev, 1); - } - - return 0; - -fail: - printk(KERN_ERR "EGPIO failed to setup\n"); - return ret; -} - -static int __exit egpio_remove(struct platform_device *pdev) -{ - struct egpio_info *ei = platform_get_drvdata(pdev); - unsigned int irq, irq_end; - - if (ei->chained_irq) { - irq_end = ei->irq_start + ei->nirqs; - for (irq = ei->irq_start; irq < irq_end; irq++) { - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE); - } - irq_set_chained_handler(ei->chained_irq, NULL); - device_init_wakeup(&pdev->dev, 0); - } - - return 0; -} - -#ifdef CONFIG_PM -static int egpio_suspend(struct platform_device *pdev, pm_message_t state) -{ - struct egpio_info *ei = platform_get_drvdata(pdev); - - if (ei->chained_irq && device_may_wakeup(&pdev->dev)) - enable_irq_wake(ei->chained_irq); - return 0; -} - -static int egpio_resume(struct platform_device *pdev) -{ - struct egpio_info *ei = platform_get_drvdata(pdev); - - if (ei->chained_irq && device_may_wakeup(&pdev->dev)) - disable_irq_wake(ei->chained_irq); - - /* Update registers from the cache, in case - the CPLD was powered off during suspend */ - egpio_write_cache(ei); - return 0; -} -#else -#define egpio_suspend NULL -#define egpio_resume NULL -#endif - - -static struct platform_driver egpio_driver = { - .driver = { - .name = "htc-egpio", - }, - .remove = __exit_p(egpio_remove), - .suspend = egpio_suspend, - .resume = egpio_resume, -}; - -static int __init egpio_init(void) -{ - return platform_driver_probe(&egpio_driver, egpio_probe); -} - -static void __exit egpio_exit(void) -{ - platform_driver_unregister(&egpio_driver); -} - -/* start early for dependencies */ -subsys_initcall(egpio_init); -module_exit(egpio_exit) - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Kevin O'Connor "); -- cgit v1.1