#include <linux/input.h>
#include <linux/input/navpoint.h>
#include <linux/lcd.h>
-#include <linux/mfd/htc-egpio.h>
#include <linux/mfd/asic3.h>
#include <linux/mtd/physmap.h>
#include <linux/pda_power.h>
+#include <linux/platform_data/gpio-htc-egpio.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/regulator/driver.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
-#include <linux/mfd/htc-egpio.h>
#include <linux/mfd/htc-pasic3.h>
#include <linux/mtd/physmap.h>
#include <linux/pda_power.h>
+#include <linux/platform_data/gpio-htc-egpio.h>
#include <linux/pwm.h>
#include <linux/pwm_backlight.h>
#include <linux/regulator/driver.h>
#include <linux/gpio.h>
#include <linux/gpio_keys.h>
#include <linux/input.h>
-#include <linux/mfd/htc-egpio.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/partitions.h>
+#include <linux/platform_data/gpio-htc-egpio.h>
#include <linux/platform_data/sa11x0-serial.h>
#include <linux/platform_device.h>
#include <linux/serial_core.h>
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
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
--- /dev/null
+/*
+ * 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 <kevin@koconnor.net>
+ * Copyright (c) 2007 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This file may be distributed under the terms of the GNU GPL license.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/platform_data/gpio-htc-egpio.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+
+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<<ei->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 <kevin@koconnor.net>");
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
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
+++ /dev/null
-/*
- * 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 <kevin@koconnor.net>
- * Copyright (c) 2007 Philipp Zabel <philipp.zabel@gmail.com>
- *
- * This file may be distributed under the terms of the GNU GPL license.
- */
-
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/spinlock.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <linux/mfd/htc-egpio.h>
-
-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<<ei->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 <kevin@koconnor.net>");
+++ /dev/null
-/*
- * HTC simple EGPIO irq and gpio extender
- */
-
-#ifndef __HTC_EGPIO_H__
-#define __HTC_EGPIO_H__
-
-#include <linux/gpio.h>
-
-/* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */
-#define HTC_EGPIO_OUTPUT (~0)
-#define HTC_EGPIO_INPUT 0
-
-/**
- * struct htc_egpio_chip - descriptor to create gpio_chip for register range
- * @reg_start: index of first register
- * @gpio_base: gpio number of first pin in this register range
- * @num_gpios: number of gpios in this register range, max BITS_PER_LONG
- * (number of registers = DIV_ROUND_UP(num_gpios, reg_width))
- * @direction: bitfield, '0' = input, '1' = output,
- */
-struct htc_egpio_chip {
- int reg_start;
- int gpio_base;
- int num_gpios;
- unsigned long direction;
- unsigned long initial_values;
-};
-
-/**
- * struct htc_egpio_platform_data - description provided by the arch
- * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START)
- * @num_irqs: number of irqs
- * @reg_width: number of bits per register, either 8 or 16 bit
- * @bus_width: alignment of the registers, either 16 or 32 bit
- * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1'
- * @ack_register: location of the irq/ack register
- * @chip: pointer to array of htc_egpio_chip descriptors
- * @num_chips: number of egpio chip descriptors
- */
-struct htc_egpio_platform_data {
- int bus_width;
- int reg_width;
-
- int irq_base;
- int num_irqs;
- int invert_acks;
- int ack_register;
-
- struct htc_egpio_chip *chip;
- int num_chips;
-};
-
-/* Determine the wakeup irq, to be called during early resume */
-extern int htc_egpio_get_wakeup_irq(struct device *dev);
-
-#endif
--- /dev/null
+/*
+ * HTC simple EGPIO irq and gpio extender
+ */
+
+#ifndef __HTC_EGPIO_H__
+#define __HTC_EGPIO_H__
+
+#include <linux/gpio.h>
+
+/* Descriptive values for all-in or all-out htc_egpio_chip descriptors. */
+#define HTC_EGPIO_OUTPUT (~0)
+#define HTC_EGPIO_INPUT 0
+
+/**
+ * struct htc_egpio_chip - descriptor to create gpio_chip for register range
+ * @reg_start: index of first register
+ * @gpio_base: gpio number of first pin in this register range
+ * @num_gpios: number of gpios in this register range, max BITS_PER_LONG
+ * (number of registers = DIV_ROUND_UP(num_gpios, reg_width))
+ * @direction: bitfield, '0' = input, '1' = output,
+ */
+struct htc_egpio_chip {
+ int reg_start;
+ int gpio_base;
+ int num_gpios;
+ unsigned long direction;
+ unsigned long initial_values;
+};
+
+/**
+ * struct htc_egpio_platform_data - description provided by the arch
+ * @irq_base: beginning of available IRQs (eg, IRQ_BOARD_START)
+ * @num_irqs: number of irqs
+ * @reg_width: number of bits per register, either 8 or 16 bit
+ * @bus_width: alignment of the registers, either 16 or 32 bit
+ * @invert_acks: set if chip requires writing '0' to ack an irq, instead of '1'
+ * @ack_register: location of the irq/ack register
+ * @chip: pointer to array of htc_egpio_chip descriptors
+ * @num_chips: number of egpio chip descriptors
+ */
+struct htc_egpio_platform_data {
+ int bus_width;
+ int reg_width;
+
+ int irq_base;
+ int num_irqs;
+ int invert_acks;
+ int ack_register;
+
+ struct htc_egpio_chip *chip;
+ int num_chips;
+};
+
+/* Determine the wakeup irq, to be called during early resume */
+extern int htc_egpio_get_wakeup_irq(struct device *dev);
+
+#endif
projects / cascardo / linux.git / commitdiff