* Note that all locks are private to this file. Nothing else may
* touch them.
*/
-#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/device.h>
+#include <linux/mutex.h>
+#include <linux/mfd/ucb1x00.h>
+#include <linux/gpio.h>
-#include <asm/dma.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
+#include <mach/dma.h>
+#include <mach/hardware.h>
-#include "ucb1x00.h"
-
-static DECLARE_MUTEX(ucb1x00_sem);
+static DEFINE_MUTEX(ucb1x00_mutex);
static LIST_HEAD(ucb1x00_drivers);
static LIST_HEAD(ucb1x00_devices);
return ucb1x00_reg_read(ucb, UCB_IO_DATA);
}
+static void ucb1x00_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ucb->io_lock, flags);
+ if (value)
+ ucb->io_out |= 1 << offset;
+ else
+ ucb->io_out &= ~(1 << offset);
+
+ ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out);
+ spin_unlock_irqrestore(&ucb->io_lock, flags);
+}
+
+static int ucb1x00_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
+ return ucb1x00_reg_read(ucb, UCB_IO_DATA) & (1 << offset);
+}
+
+static int ucb1x00_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ucb->io_lock, flags);
+ ucb->io_dir &= ~(1 << offset);
+ ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir);
+ spin_unlock_irqrestore(&ucb->io_lock, flags);
+
+ return 0;
+}
+
+static int ucb1x00_gpio_direction_output(struct gpio_chip *chip, unsigned offset
+ , int value)
+{
+ struct ucb1x00 *ucb = container_of(chip, struct ucb1x00, gpio);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ucb->io_lock, flags);
+ ucb->io_dir |= (1 << offset);
+ ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir);
+
+ if (value)
+ ucb->io_out |= 1 << offset;
+ else
+ ucb->io_out &= ~(1 << offset);
+ ucb1x00_reg_write(ucb, UCB_IO_DATA, ucb->io_out);
+ spin_unlock_irqrestore(&ucb->io_lock, flags);
+
+ return 0;
+}
+
/*
* UCB1300 data sheet says we must:
* 1. enable ADC => 5us (including reference startup time)
* SIBCLK to talk to the chip. We leave the clock running until
* we have finished processing all interrupts from the chip.
*/
-static irqreturn_t ucb1x00_irq(int irqnr, void *devid, struct pt_regs *regs)
+static irqreturn_t ucb1x00_irq(int irqnr, void *devid)
{
struct ucb1x00 *ucb = devid;
struct ucb1x00_irq *irq;
unsigned long mask;
mask = probe_irq_on();
- if (!mask)
+ if (!mask) {
+ probe_irq_off(mask);
return NO_IRQ;
+ }
/*
* Enable the ADC interrupt.
return probe_irq_off(mask);
}
-static void ucb1x00_release(struct class_device *dev)
+static void ucb1x00_release(struct device *dev)
{
struct ucb1x00 *ucb = classdev_to_ucb1x00(dev);
kfree(ucb);
static struct class ucb1x00_class = {
.name = "ucb1x00",
- .release = ucb1x00_release,
+ .dev_release = ucb1x00_release,
};
static int ucb1x00_probe(struct mcp *mcp)
struct ucb1x00_driver *drv;
unsigned int id;
int ret = -ENODEV;
+ int temp;
mcp_enable(mcp);
id = mcp_reg_read(mcp, UCB_ID);
- if (id != UCB_ID_1200 && id != UCB_ID_1300) {
+ if (id != UCB_ID_1200 && id != UCB_ID_1300 && id != UCB_ID_TC35143) {
printk(KERN_WARNING "UCB1x00 ID not found: %04x\n", id);
goto err_disable;
}
- ucb = kmalloc(sizeof(struct ucb1x00), GFP_KERNEL);
+ ucb = kzalloc(sizeof(struct ucb1x00), GFP_KERNEL);
ret = -ENOMEM;
if (!ucb)
goto err_disable;
- memset(ucb, 0, sizeof(struct ucb1x00));
- ucb->cdev.class = &ucb1x00_class;
- ucb->cdev.dev = &mcp->attached_device;
- strlcpy(ucb->cdev.class_id, "ucb1x00", sizeof(ucb->cdev.class_id));
+ ucb->dev.class = &ucb1x00_class;
+ ucb->dev.parent = &mcp->attached_device;
+ dev_set_name(&ucb->dev, "ucb1x00");
spin_lock_init(&ucb->lock);
spin_lock_init(&ucb->io_lock);
goto err_free;
}
- ret = request_irq(ucb->irq, ucb1x00_irq, 0, "UCB1x00", ucb);
+ ucb->gpio.base = -1;
+ if (mcp->gpio_base != 0) {
+ ucb->gpio.label = dev_name(&ucb->dev);
+ ucb->gpio.base = mcp->gpio_base;
+ ucb->gpio.ngpio = 10;
+ ucb->gpio.set = ucb1x00_gpio_set;
+ ucb->gpio.get = ucb1x00_gpio_get;
+ ucb->gpio.direction_input = ucb1x00_gpio_direction_input;
+ ucb->gpio.direction_output = ucb1x00_gpio_direction_output;
+ ret = gpiochip_add(&ucb->gpio);
+ if (ret)
+ goto err_free;
+ } else
+ dev_info(&ucb->dev, "gpio_base not set so no gpiolib support");
+
+ ret = request_irq(ucb->irq, ucb1x00_irq, IRQF_TRIGGER_RISING,
+ "UCB1x00", ucb);
if (ret) {
printk(KERN_ERR "ucb1x00: unable to grab irq%d: %d\n",
ucb->irq, ret);
- goto err_free;
+ goto err_gpio;
}
- set_irq_type(ucb->irq, IRQT_RISING);
mcp_set_drvdata(mcp, ucb);
- ret = class_device_register(&ucb->cdev);
+ ret = device_register(&ucb->dev);
if (ret)
goto err_irq;
+
INIT_LIST_HEAD(&ucb->devs);
- down(&ucb1x00_sem);
+ mutex_lock(&ucb1x00_mutex);
list_add(&ucb->node, &ucb1x00_devices);
list_for_each_entry(drv, &ucb1x00_drivers, node) {
ucb1x00_add_dev(ucb, drv);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
+
goto out;
err_irq:
free_irq(ucb->irq, ucb);
+ err_gpio:
+ if (ucb->gpio.base != -1)
+ temp = gpiochip_remove(&ucb->gpio);
err_free:
kfree(ucb);
err_disable:
{
struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
struct list_head *l, *n;
+ int ret;
- down(&ucb1x00_sem);
+ mutex_lock(&ucb1x00_mutex);
list_del(&ucb->node);
list_for_each_safe(l, n, &ucb->devs) {
struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, dev_node);
ucb1x00_remove_dev(dev);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
+
+ if (ucb->gpio.base != -1) {
+ ret = gpiochip_remove(&ucb->gpio);
+ if (ret)
+ dev_err(&ucb->dev, "Can't remove gpio chip: %d\n", ret);
+ }
free_irq(ucb->irq, ucb);
- class_device_unregister(&ucb->cdev);
+ device_unregister(&ucb->dev);
}
int ucb1x00_register_driver(struct ucb1x00_driver *drv)
struct ucb1x00 *ucb;
INIT_LIST_HEAD(&drv->devs);
- down(&ucb1x00_sem);
+ mutex_lock(&ucb1x00_mutex);
list_add(&drv->node, &ucb1x00_drivers);
list_for_each_entry(ucb, &ucb1x00_devices, node) {
ucb1x00_add_dev(ucb, drv);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
return 0;
}
{
struct list_head *n, *l;
- down(&ucb1x00_sem);
+ mutex_lock(&ucb1x00_mutex);
list_del(&drv->node);
list_for_each_safe(l, n, &drv->devs) {
struct ucb1x00_dev *dev = list_entry(l, struct ucb1x00_dev, drv_node);
ucb1x00_remove_dev(dev);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
}
static int ucb1x00_suspend(struct mcp *mcp, pm_message_t state)
struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
struct ucb1x00_dev *dev;
- down(&ucb1x00_sem);
+ mutex_lock(&ucb1x00_mutex);
list_for_each_entry(dev, &ucb->devs, dev_node) {
if (dev->drv->suspend)
dev->drv->suspend(dev, state);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
return 0;
}
struct ucb1x00 *ucb = mcp_get_drvdata(mcp);
struct ucb1x00_dev *dev;
- down(&ucb1x00_sem);
+ ucb1x00_reg_write(ucb, UCB_IO_DIR, ucb->io_dir);
+ mutex_lock(&ucb1x00_mutex);
list_for_each_entry(dev, &ucb->devs, dev_node) {
if (dev->drv->resume)
dev->drv->resume(dev);
}
- up(&ucb1x00_sem);
+ mutex_unlock(&ucb1x00_mutex);
return 0;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff