X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=drivers%2Fgpio%2Fbcm2835_gpio.c;h=8dd7a28e2670c98492078e4bcd52be56ac2d6164;hb=979a1f8b21aded450d34bddbc99804f7e6489622;hp=97b51371145e81de9f268a33f001c72d6f63ff98;hpb=326ea986ac150acdc7656d57fca647db80b50158;p=oweals%2Fu-boot.git

diff --git a/drivers/gpio/bcm2835_gpio.c b/drivers/gpio/bcm2835_gpio.c
index 97b5137114..8dd7a28e26 100644
--- a/drivers/gpio/bcm2835_gpio.c
+++ b/drivers/gpio/bcm2835_gpio.c
@@ -6,73 +6,123 @@
  */
 
 #include <common.h>
+#include <dm.h>
+#include <errno.h>
 #include <asm/gpio.h>
 #include <asm/io.h>
 
-inline int gpio_is_valid(unsigned gpio)
-{
-	return (gpio < BCM2835_GPIO_COUNT);
-}
-
-int gpio_request(unsigned gpio, const char *label)
-{
-	return !gpio_is_valid(gpio);
-}
+struct bcm2835_gpios {
+	struct bcm2835_gpio_regs *reg;
+};
 
-int gpio_free(unsigned gpio)
+static int bcm2835_gpio_direction_input(struct udevice *dev, unsigned gpio)
 {
-	return 0;
-}
-
-int gpio_direction_input(unsigned gpio)
-{
-	struct bcm2835_gpio_regs *reg =
-		(struct bcm2835_gpio_regs *)BCM2835_GPIO_BASE;
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
 	unsigned val;
 
-	val = readl(&reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
 	val &= ~(BCM2835_GPIO_FSEL_MASK << BCM2835_GPIO_FSEL_SHIFT(gpio));
 	val |= (BCM2835_GPIO_INPUT << BCM2835_GPIO_FSEL_SHIFT(gpio));
-	writel(val, &reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	writel(val, &gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
 
 	return 0;
 }
 
-int gpio_direction_output(unsigned gpio, int value)
+static int bcm2835_gpio_direction_output(struct udevice *dev, unsigned gpio,
+					 int value)
 {
-	struct bcm2835_gpio_regs *reg =
-		(struct bcm2835_gpio_regs *)BCM2835_GPIO_BASE;
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
 	unsigned val;
 
 	gpio_set_value(gpio, value);
 
-	val = readl(&reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
 	val &= ~(BCM2835_GPIO_FSEL_MASK << BCM2835_GPIO_FSEL_SHIFT(gpio));
 	val |= (BCM2835_GPIO_OUTPUT << BCM2835_GPIO_FSEL_SHIFT(gpio));
-	writel(val, &reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	writel(val, &gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
 
 	return 0;
 }
 
-int gpio_get_value(unsigned gpio)
+static int bcm2835_get_value(const struct bcm2835_gpios *gpios, unsigned gpio)
 {
-	struct bcm2835_gpio_regs *reg =
-		(struct bcm2835_gpio_regs *)BCM2835_GPIO_BASE;
 	unsigned val;
 
-	val = readl(&reg->gplev[BCM2835_GPIO_COMMON_BANK(gpio)]);
+	val = readl(&gpios->reg->gplev[BCM2835_GPIO_COMMON_BANK(gpio)]);
 
 	return (val >> BCM2835_GPIO_COMMON_SHIFT(gpio)) & 0x1;
 }
 
-int gpio_set_value(unsigned gpio, int value)
+static int bcm2835_gpio_get_value(struct udevice *dev, unsigned gpio)
 {
-	struct bcm2835_gpio_regs *reg =
-		(struct bcm2835_gpio_regs *)BCM2835_GPIO_BASE;
-	u32 *output_reg = value ? reg->gpset : reg->gpclr;
+	const struct bcm2835_gpios *gpios = dev_get_priv(dev);
+
+	return bcm2835_get_value(gpios, gpio);
+}
+
+static int bcm2835_gpio_set_value(struct udevice *dev, unsigned gpio,
+				  int value)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	u32 *output_reg = value ? gpios->reg->gpset : gpios->reg->gpclr;
 
 	writel(1 << BCM2835_GPIO_COMMON_SHIFT(gpio),
 				&output_reg[BCM2835_GPIO_COMMON_BANK(gpio)]);
 
 	return 0;
 }
+
+int bcm2835_gpio_get_func_id(struct udevice *dev, unsigned gpio)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	u32 val;
+
+	val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+
+	return (val >> BCM2835_GPIO_FSEL_SHIFT(gpio) & BCM2835_GPIO_FSEL_MASK);
+}
+
+static int bcm2835_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+	int funcid = bcm2835_gpio_get_func_id(dev, offset);
+
+	switch (funcid) {
+	case BCM2835_GPIO_OUTPUT:
+		return GPIOF_OUTPUT;
+	case BCM2835_GPIO_INPUT:
+		return GPIOF_INPUT;
+	default:
+		return GPIOF_FUNC;
+	}
+}
+
+
+static const struct dm_gpio_ops gpio_bcm2835_ops = {
+	.direction_input	= bcm2835_gpio_direction_input,
+	.direction_output	= bcm2835_gpio_direction_output,
+	.get_value		= bcm2835_gpio_get_value,
+	.set_value		= bcm2835_gpio_set_value,
+	.get_function		= bcm2835_gpio_get_function,
+};
+
+static int bcm2835_gpio_probe(struct udevice *dev)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev);
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+	uc_priv->bank_name = "GPIO";
+	uc_priv->gpio_count = BCM2835_GPIO_COUNT;
+	gpios->reg = (struct bcm2835_gpio_regs *)plat->base;
+
+	return 0;
+}
+
+U_BOOT_DRIVER(gpio_bcm2835) = {
+	.name	= "gpio_bcm2835",
+	.id	= UCLASS_GPIO,
+	.ops	= &gpio_bcm2835_ops,
+	.probe	= bcm2835_gpio_probe,
+	.flags	= DM_FLAG_PRE_RELOC,
+	.priv_auto_alloc_size = sizeof(struct bcm2835_gpios),
+};