tree-wide: fix assorted typos all over the place
[linux-2.6.git] / arch / arm / common / scoop.c
index 0c3cbd9..37bda5f 100644 (file)
 
 #include <linux/device.h>
 #include <linux/string.h>
+#include <linux/slab.h>
 #include <linux/platform_device.h>
-#include <asm/io.h>
+#include <linux/io.h>
+#include <asm/gpio.h>
 #include <asm/hardware/scoop.h>
 
-#define SCOOP_REG(d,adr) (*(volatile unsigned short*)(d +(adr)))
+/* PCMCIA to Scoop linkage
+
+   There is no easy way to link multiple scoop devices into one
+   single entity for the pxa2xx_pcmcia device so this structure
+   is used which is setup by the platform code.
+
+   This file is never modular so this symbol is always
+   accessile to the board support files.
+*/
+struct scoop_pcmcia_config *platform_scoop_config;
+EXPORT_SYMBOL(platform_scoop_config);
 
 struct  scoop_dev {
-       void  *base;
+       void __iomem *base;
+       struct gpio_chip gpio;
        spinlock_t scoop_lock;
        unsigned short suspend_clr;
        unsigned short suspend_set;
@@ -31,57 +44,96 @@ void reset_scoop(struct device *dev)
 {
        struct scoop_dev *sdev = dev_get_drvdata(dev);
 
-       SCOOP_REG(sdev->base,SCOOP_MCR) = 0x0100;  // 00
-       SCOOP_REG(sdev->base,SCOOP_CDR) = 0x0000;  // 04
-       SCOOP_REG(sdev->base,SCOOP_CPR) = 0x0000;  // 0C
-       SCOOP_REG(sdev->base,SCOOP_CCR) = 0x0000;  // 10
-       SCOOP_REG(sdev->base,SCOOP_IMR) = 0x0000;  // 18
-       SCOOP_REG(sdev->base,SCOOP_IRM) = 0x00FF;  // 14
-       SCOOP_REG(sdev->base,SCOOP_ISR) = 0x0000;  // 1C
-       SCOOP_REG(sdev->base,SCOOP_IRM) = 0x0000;
+       iowrite16(0x0100, sdev->base + SCOOP_MCR);  // 00
+       iowrite16(0x0000, sdev->base + SCOOP_CDR);  // 04
+       iowrite16(0x0000, sdev->base + SCOOP_CCR);  // 10
+       iowrite16(0x0000, sdev->base + SCOOP_IMR);  // 18
+       iowrite16(0x00FF, sdev->base + SCOOP_IRM);  // 14
+       iowrite16(0x0000, sdev->base + SCOOP_ISR);  // 1C
+       iowrite16(0x0000, sdev->base + SCOOP_IRM);
 }
 
-unsigned short set_scoop_gpio(struct device *dev, unsigned short bit)
+static void __scoop_gpio_set(struct scoop_dev *sdev,
+                       unsigned offset, int value)
 {
-       unsigned short gpio_bit;
-       unsigned long flag;
-       struct scoop_dev *sdev = dev_get_drvdata(dev);
+       unsigned short gpwr;
+
+       gpwr = ioread16(sdev->base + SCOOP_GPWR);
+       if (value)
+               gpwr |= 1 << (offset + 1);
+       else
+               gpwr &= ~(1 << (offset + 1));
+       iowrite16(gpwr, sdev->base + SCOOP_GPWR);
+}
+
+static void scoop_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+       struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
+       unsigned long flags;
+
+       spin_lock_irqsave(&sdev->scoop_lock, flags);
 
-       spin_lock_irqsave(&sdev->scoop_lock, flag);
-       gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) | bit;
-       SCOOP_REG(sdev->base, SCOOP_GPWR) = gpio_bit;
-       spin_unlock_irqrestore(&sdev->scoop_lock, flag);
+       __scoop_gpio_set(sdev, offset, value);
 
-       return gpio_bit;
+       spin_unlock_irqrestore(&sdev->scoop_lock, flags);
 }
 
-unsigned short reset_scoop_gpio(struct device *dev, unsigned short bit)
+static int scoop_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
-       unsigned short gpio_bit;
-       unsigned long flag;
-       struct scoop_dev *sdev = dev_get_drvdata(dev);
+       struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
 
-       spin_lock_irqsave(&sdev->scoop_lock, flag);
-       gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) & ~bit;
-       SCOOP_REG(sdev->base,SCOOP_GPWR) = gpio_bit;
-       spin_unlock_irqrestore(&sdev->scoop_lock, flag);
+       /* XXX: I'm unsure, but it seems so */
+       return ioread16(sdev->base + SCOOP_GPRR) & (1 << (offset + 1));
+}
 
-       return gpio_bit;
+static int scoop_gpio_direction_input(struct gpio_chip *chip,
+                       unsigned offset)
+{
+       struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
+       unsigned long flags;
+       unsigned short gpcr;
+
+       spin_lock_irqsave(&sdev->scoop_lock, flags);
+
+       gpcr = ioread16(sdev->base + SCOOP_GPCR);
+       gpcr &= ~(1 << (offset + 1));
+       iowrite16(gpcr, sdev->base + SCOOP_GPCR);
+
+       spin_unlock_irqrestore(&sdev->scoop_lock, flags);
+
+       return 0;
 }
 
-EXPORT_SYMBOL(set_scoop_gpio);
-EXPORT_SYMBOL(reset_scoop_gpio);
+static int scoop_gpio_direction_output(struct gpio_chip *chip,
+                       unsigned offset, int value)
+{
+       struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio);
+       unsigned long flags;
+       unsigned short gpcr;
+
+       spin_lock_irqsave(&sdev->scoop_lock, flags);
+
+       __scoop_gpio_set(sdev, offset, value);
+
+       gpcr = ioread16(sdev->base + SCOOP_GPCR);
+       gpcr |= 1 << (offset + 1);
+       iowrite16(gpcr, sdev->base + SCOOP_GPCR);
+
+       spin_unlock_irqrestore(&sdev->scoop_lock, flags);
+
+       return 0;
+}
 
 unsigned short read_scoop_reg(struct device *dev, unsigned short reg)
 {
        struct scoop_dev *sdev = dev_get_drvdata(dev);
-       return SCOOP_REG(sdev->base,reg);
+       return ioread16(sdev->base + reg);
 }
 
 void write_scoop_reg(struct device *dev, unsigned short reg, unsigned short data)
 {
        struct scoop_dev *sdev = dev_get_drvdata(dev);
-       SCOOP_REG(sdev->base,reg)=data;
+       iowrite16(data, sdev->base + reg);
 }
 
 EXPORT_SYMBOL(reset_scoop);
@@ -92,9 +144,9 @@ static void check_scoop_reg(struct scoop_dev *sdev)
 {
        unsigned short mcr;
 
-       mcr = SCOOP_REG(sdev->base, SCOOP_MCR);
+       mcr = ioread16(sdev->base + SCOOP_MCR);
        if ((mcr & 0x100) == 0)
-               SCOOP_REG(sdev->base, SCOOP_MCR) = 0x0101;
+               iowrite16(0x0101, sdev->base + SCOOP_MCR);
 }
 
 #ifdef CONFIG_PM
@@ -103,8 +155,8 @@ static int scoop_suspend(struct platform_device *dev, pm_message_t state)
        struct scoop_dev *sdev = platform_get_drvdata(dev);
 
        check_scoop_reg(sdev);
-       sdev->scoop_gpwr = SCOOP_REG(sdev->base, SCOOP_GPWR);
-       SCOOP_REG(sdev->base, SCOOP_GPWR) = (sdev->scoop_gpwr & ~sdev->suspend_clr) | sdev->suspend_set;
+       sdev->scoop_gpwr = ioread16(sdev->base + SCOOP_GPWR);
+       iowrite16((sdev->scoop_gpwr & ~sdev->suspend_clr) | sdev->suspend_set, sdev->base + SCOOP_GPWR);
 
        return 0;
 }
@@ -114,7 +166,7 @@ static int scoop_resume(struct platform_device *dev)
        struct scoop_dev *sdev = platform_get_drvdata(dev);
 
        check_scoop_reg(sdev);
-       SCOOP_REG(sdev->base,SCOOP_GPWR) = sdev->scoop_gpwr;
+       iowrite16(sdev->scoop_gpwr, sdev->base + SCOOP_GPWR);
 
        return 0;
 }
@@ -123,60 +175,99 @@ static int scoop_resume(struct platform_device *dev)
 #define scoop_resume   NULL
 #endif
 
-int __init scoop_probe(struct platform_device *pdev)
+static int __devinit scoop_probe(struct platform_device *pdev)
 {
        struct scoop_dev *devptr;
        struct scoop_config *inf;
        struct resource *mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       int ret;
+       int temp;
 
        if (!mem)
                return -EINVAL;
 
-       devptr = kmalloc(sizeof(struct scoop_dev), GFP_KERNEL);
-
+       devptr = kzalloc(sizeof(struct scoop_dev), GFP_KERNEL);
        if (!devptr)
-               return  -ENOMEM;
+               return -ENOMEM;
 
-       memset(devptr, 0, sizeof(struct scoop_dev));
        spin_lock_init(&devptr->scoop_lock);
 
        inf = pdev->dev.platform_data;
        devptr->base = ioremap(mem->start, mem->end - mem->start + 1);
 
        if (!devptr->base) {
-               kfree(devptr);
-               return -ENOMEM;
+               ret = -ENOMEM;
+               goto err_ioremap;
        }
 
        platform_set_drvdata(pdev, devptr);
 
-       printk("Sharp Scoop Device found at 0x%08x -> 0x%08x\n",(unsigned int)mem->start,(unsigned int)devptr->base);
+       printk("Sharp Scoop Device found at 0x%08x -> 0x%8p\n",(unsigned int)mem->start, devptr->base);
 
-       SCOOP_REG(devptr->base, SCOOP_MCR) = 0x0140;
+       iowrite16(0x0140, devptr->base + SCOOP_MCR);
        reset_scoop(&pdev->dev);
-       SCOOP_REG(devptr->base, SCOOP_GPCR) = inf->io_dir & 0xffff;
-       SCOOP_REG(devptr->base, SCOOP_GPWR) = inf->io_out & 0xffff;
+       iowrite16(0x0000, devptr->base + SCOOP_CPR);
+       iowrite16(inf->io_dir & 0xffff, devptr->base + SCOOP_GPCR);
+       iowrite16(inf->io_out & 0xffff, devptr->base + SCOOP_GPWR);
 
        devptr->suspend_clr = inf->suspend_clr;
        devptr->suspend_set = inf->suspend_set;
 
+       devptr->gpio.base = -1;
+
+       if (inf->gpio_base != 0) {
+               devptr->gpio.label = dev_name(&pdev->dev);
+               devptr->gpio.base = inf->gpio_base;
+               devptr->gpio.ngpio = 12; /* PA11 = 0, PA12 = 1, etc. up to PA22 = 11 */
+               devptr->gpio.set = scoop_gpio_set;
+               devptr->gpio.get = scoop_gpio_get;
+               devptr->gpio.direction_input = scoop_gpio_direction_input;
+               devptr->gpio.direction_output = scoop_gpio_direction_output;
+
+               ret = gpiochip_add(&devptr->gpio);
+               if (ret)
+                       goto err_gpio;
+       }
+
        return 0;
+
+       if (devptr->gpio.base != -1)
+               temp = gpiochip_remove(&devptr->gpio);
+err_gpio:
+       platform_set_drvdata(pdev, NULL);
+err_ioremap:
+       iounmap(devptr->base);
+       kfree(devptr);
+
+       return ret;
 }
 
-static int scoop_remove(struct platform_device *pdev)
+static int __devexit scoop_remove(struct platform_device *pdev)
 {
        struct scoop_dev *sdev = platform_get_drvdata(pdev);
-       if (sdev) {
-               iounmap(sdev->base);
-               kfree(sdev);
-               platform_set_drvdata(pdev, NULL);
+       int ret;
+
+       if (!sdev)
+               return -EINVAL;
+
+       if (sdev->gpio.base != -1) {
+               ret = gpiochip_remove(&sdev->gpio);
+               if (ret) {
+                       dev_err(&pdev->dev, "Can't remove gpio chip: %d\n", ret);
+                       return ret;
+               }
        }
+
+       platform_set_drvdata(pdev, NULL);
+       iounmap(sdev->base);
+       kfree(sdev);
+
        return 0;
 }
 
 static struct platform_driver scoop_driver = {
        .probe          = scoop_probe,
-       .remove         = scoop_remove,
+       .remove         = __devexit_p(scoop_remove),
        .suspend        = scoop_suspend,
        .resume         = scoop_resume,
        .driver         = {
@@ -184,7 +275,7 @@ static struct platform_driver scoop_driver = {
        },
 };
 
-int __init scoop_init(void)
+static int __init scoop_init(void)
 {
        return platform_driver_register(&scoop_driver);
 }