-enum ixp4xx_irq_type {
- IXP4XX_IRQ_LEVEL, IXP4XX_IRQ_EDGE
-};
-static void ixp4xx_config_irq(unsigned irq, enum ixp4xx_irq_type type);
-
-/*************************************************************************
- * GPIO acces functions
- *************************************************************************/
-
-/*
- * Configure GPIO line for input, interrupt, or output operation
- *
- * TODO: Enable/disable the irq_desc based on interrupt or output mode.
- * TODO: Should these be named ixp4xx_gpio_?
- */
-void gpio_line_config(u8 line, u32 style)
-{
- static const int gpio2irq[] = {
- 6, 7, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29
- };
- u32 enable;
- volatile u32 *int_reg;
- u32 int_style;
- enum ixp4xx_irq_type irq_type;
-
- enable = *IXP4XX_GPIO_GPOER;
-
- if (style & IXP4XX_GPIO_OUT) {
- enable &= ~((1) << line);
- } else if (style & IXP4XX_GPIO_IN) {
- enable |= ((1) << line);
-
- switch (style & IXP4XX_GPIO_INTSTYLE_MASK)
- {
- case (IXP4XX_GPIO_ACTIVE_HIGH):
- int_style = IXP4XX_GPIO_STYLE_ACTIVE_HIGH;
- irq_type = IXP4XX_IRQ_LEVEL;
- break;
- case (IXP4XX_GPIO_ACTIVE_LOW):
- int_style = IXP4XX_GPIO_STYLE_ACTIVE_LOW;
- irq_type = IXP4XX_IRQ_LEVEL;
- break;
- case (IXP4XX_GPIO_RISING_EDGE):
- int_style = IXP4XX_GPIO_STYLE_RISING_EDGE;
- irq_type = IXP4XX_IRQ_EDGE;
- break;
- case (IXP4XX_GPIO_FALLING_EDGE):
- int_style = IXP4XX_GPIO_STYLE_FALLING_EDGE;
- irq_type = IXP4XX_IRQ_EDGE;
- break;
- case (IXP4XX_GPIO_TRANSITIONAL):
- int_style = IXP4XX_GPIO_STYLE_TRANSITIONAL;
- irq_type = IXP4XX_IRQ_EDGE;
- break;
- default:
- int_style = IXP4XX_GPIO_STYLE_ACTIVE_HIGH;
- irq_type = IXP4XX_IRQ_LEVEL;
- break;
- }
-
- if (style & IXP4XX_GPIO_INTSTYLE_MASK)
- ixp4xx_config_irq(gpio2irq[line], irq_type);
-
- if (line >= 8) { /* pins 8-15 */
- line -= 8;
- int_reg = IXP4XX_GPIO_GPIT2R;
- }
- else { /* pins 0-7 */
- int_reg = IXP4XX_GPIO_GPIT1R;
- }
-
- /* Clear the style for the appropriate pin */
- *int_reg &= ~(IXP4XX_GPIO_STYLE_CLEAR <<
- (line * IXP4XX_GPIO_STYLE_SIZE));
-
- /* Set the new style */
- *int_reg |= (int_style << (line * IXP4XX_GPIO_STYLE_SIZE));
- }
-
- *IXP4XX_GPIO_GPOER = enable;
-}
-
-EXPORT_SYMBOL(gpio_line_config);
-