diff options
Diffstat (limited to 'arch/arm/common/scoop.c')
| -rw-r--r-- | arch/arm/common/scoop.c | 183 |
1 files changed, 147 insertions, 36 deletions
diff --git a/arch/arm/common/scoop.c b/arch/arm/common/scoop.c index 314ebd3a1d71..bc299b07a6fa 100644 --- a/arch/arm/common/scoop.c +++ b/arch/arm/common/scoop.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/platform_device.h> #include <asm/io.h> +#include <asm/gpio.h> #include <asm/hardware/scoop.h> /* PCMCIA to Scoop linkage @@ -30,10 +31,9 @@ struct scoop_pcmcia_config *platform_scoop_config; EXPORT_SYMBOL(platform_scoop_config); -#define SCOOP_REG(d,adr) (*(volatile unsigned short*)(d +(adr))) - struct scoop_dev { - void *base; + void __iomem *base; + struct gpio_chip gpio; spinlock_t scoop_lock; unsigned short suspend_clr; unsigned short suspend_set; @@ -44,13 +44,84 @@ 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_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); +} + +static void __scoop_gpio_set(struct scoop_dev *sdev, + unsigned offset, int value) +{ + 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); + + __scoop_gpio_set(sdev, offset, value); + + spin_unlock_irqrestore(&sdev->scoop_lock, flags); +} + +static int scoop_gpio_get(struct gpio_chip *chip, unsigned offset) +{ + struct scoop_dev *sdev = container_of(chip, struct scoop_dev, gpio); + + /* XXX: I'm usure, but it seems so */ + return ioread16(sdev->base + SCOOP_GPRR) & (1 << (offset + 1)); +} + +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; +} + +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 set_scoop_gpio(struct device *dev, unsigned short bit) @@ -60,8 +131,8 @@ unsigned short set_scoop_gpio(struct device *dev, unsigned short bit) struct scoop_dev *sdev = dev_get_drvdata(dev); spin_lock_irqsave(&sdev->scoop_lock, flag); - gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) | bit; - SCOOP_REG(sdev->base, SCOOP_GPWR) = gpio_bit; + gpio_bit = ioread16(sdev->base + SCOOP_GPWR) | bit; + iowrite16(gpio_bit, sdev->base + SCOOP_GPWR); spin_unlock_irqrestore(&sdev->scoop_lock, flag); return gpio_bit; @@ -74,8 +145,8 @@ unsigned short reset_scoop_gpio(struct device *dev, unsigned short bit) struct scoop_dev *sdev = dev_get_drvdata(dev); spin_lock_irqsave(&sdev->scoop_lock, flag); - gpio_bit = SCOOP_REG(sdev->base, SCOOP_GPWR) & ~bit; - SCOOP_REG(sdev->base,SCOOP_GPWR) = gpio_bit; + gpio_bit = ioread16(sdev->base + SCOOP_GPWR) & ~bit; + iowrite16(gpio_bit, sdev->base + SCOOP_GPWR); spin_unlock_irqrestore(&sdev->scoop_lock, flag); return gpio_bit; @@ -87,13 +158,13 @@ EXPORT_SYMBOL(reset_scoop_gpio); 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); @@ -104,9 +175,9 @@ 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 @@ -115,8 +186,8 @@ 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; } @@ -126,7 +197,7 @@ 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; } @@ -135,11 +206,13 @@ 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; @@ -154,40 +227,78 @@ int __init scoop_probe(struct platform_device *pdev) 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_CPR) = 0x0000; - 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 = pdev->dev.bus_id; + 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 = { @@ -195,7 +306,7 @@ static struct platform_driver scoop_driver = { }, }; -int __init scoop_init(void) +static int __init scoop_init(void) { return platform_driver_register(&scoop_driver); } |