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path: root/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c
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Diffstat (limited to 'target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c')
-rw-r--r--target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c b/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c
new file mode 100644
index 0000000000..45d0bf9126
--- /dev/null
+++ b/target/linux/s3c24xx/files-2.6.30/drivers/mfd/glamo/glamo-gpio.c
@@ -0,0 +1,62 @@
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/io.h>
+
+#include <linux/glamo-gpio.h>
+
+#include "glamo-core.h"
+#include "glamo-regs.h"
+
+void glamo_gpio_setpin(struct glamo_core *glamo, unsigned int pin,
+ unsigned int value)
+{
+ unsigned int reg = REG_OF_GPIO(pin);
+ u_int16_t tmp;
+
+ spin_lock(&glamo->lock);
+ tmp = readw(glamo->base + reg);
+ if (value)
+ tmp |= OUTPUT_BIT(pin);
+ else
+ tmp &= ~OUTPUT_BIT(pin);
+ writew(tmp, glamo->base + reg);
+ spin_unlock(&glamo->lock);
+}
+EXPORT_SYMBOL(glamo_gpio_setpin);
+
+int glamo_gpio_getpin(struct glamo_core *glamo, unsigned int pin)
+{
+ return readw(REG_OF_GPIO(pin)) & INPUT_BIT(pin) ? 1 : 0;
+}
+EXPORT_SYMBOL(glamo_gpio_getpin);
+
+void glamo_gpio_cfgpin(struct glamo_core *glamo, unsigned int pinfunc)
+{
+ unsigned int reg = REG_OF_GPIO(pinfunc);
+ u_int16_t tmp;
+
+ spin_lock(&glamo->lock);
+ tmp = readw(glamo->base + reg);
+
+ if ((pinfunc & 0x00f0) == GLAMO_GPIO_F_FUNC) {
+ /* pin is a function pin: clear gpio bit */
+ tmp &= ~FUNC_BIT(pinfunc);
+ } else {
+ /* pin is gpio: set gpio bit */
+ tmp |= FUNC_BIT(pinfunc);
+
+ if (pinfunc & GLAMO_GPIO_F_IN) {
+ /* gpio input: set bit to disable output mode */
+ tmp |= GPIO_OUT_BIT(pinfunc);
+ } else if (pinfunc & GLAMO_GPIO_F_OUT) {
+ /* gpio output: clear bit to enable output mode */
+ tmp &= ~GPIO_OUT_BIT(pinfunc);
+ }
+ }
+ writew(tmp, glamo->base + reg);
+ spin_unlock(&glamo->lock);
+}
+EXPORT_SYMBOL(glamo_gpio_cfgpin);
+