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Midified UART init, added interrupt handlers for DCD lines

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7146 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
hcg
2007-05-09 15:19:49 +00:00
parent 2f214490a3
commit 16090fc49f
2 changed files with 137 additions and 1 deletions
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95
target/linux/at91-2.6/patches/008-fdl-serial.patch
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@@ -1,5 +1,5 @@
--- linux-2.6.19.2.old/drivers/serial/atmel_serial.c 2007-05-01 13:08:03.000000000 +0200
+++ linux-2.6.19.2/drivers/serial/atmel_serial.c 2007-05-09 10:21:45.000000000 +0200
+++ linux-2.6.19.2/drivers/serial/atmel_serial.c 2007-05-09 17:13:34.000000000 +0200
@@ -173,6 +173,34 @@
at91_set_gpio_value(AT91_PIN_PA21, 0);
else
@@ -69,3 +69,96 @@
return ret;
}
@@ -510,6 +554,34 @@
}
/*
+ * USART0 DCD Interrupt handler
+ */
+
+static irqreturn_t atmel_u0_DCD_interrupt(int irq, void *dev_id)
+{
+ struct uart_port *port = dev_id;
+ int status = at91_get_gpio_value(irq);
+
+ uart_handle_dcd_change(port, !(status));
+
+ return IRQ_HANDLED;
+}
+
+/*
+ * USART3 DCD Interrupt handler
+ */
+
+static irqreturn_t atmel_u3_DCD_interrupt(int irq, void *dev_id)
+{
+ struct uart_port *port = dev_id;
+ int status = at91_get_gpio_value(irq);
+
+ uart_handle_dcd_change(port, !(status));
+
+ return IRQ_HANDLED;
+}
+
+/*
* Interrupt handler
*/
static irqreturn_t atmel_interrupt(int irq, void *dev_id)
@@ -586,6 +658,24 @@
return retval;
}
+ if (port->mapbase == AT91RM9200_BASE_US0) {
+ retval = request_irq(AT91_PIN_PA19, atmel_u0_DCD_interrupt, 0, "atmel_serial", port);
+ if (retval) {
+ printk("atmel_serial: atmel_startup - Can't get u0DCD irq\n");
+ free_irq(port->irq, port);
+ return retval;
+ }
+ }
+ if (port->mapbase == AT91RM9200_BASE_US3) {
+ retval = request_irq(AT91_PIN_PA24, atmel_u3_DCD_interrupt, 0, "atmel_serial", port);
+ if (retval) {
+ printk("atmel_serial: atmel_startup - Can't get u3DCD irq\n");
+ free_irq(port->irq, port);
+ return retval;
+ }
+ }
+
+
/*
* Initialize DMA (if necessary)
*/
@@ -602,6 +692,10 @@
kfree(atmel_port->pdc_rx[0].buf);
}
free_irq(port->irq, port);
+ if (port->mapbase == AT91RM9200_BASE_US0)
+ free_irq(AT91_PIN_PA19, port);
+ if (port->mapbase == AT91RM9200_BASE_US3)
+ free_irq(AT91_PIN_PA24, port);
return -ENOMEM;
}
pdc->dma_addr = dma_map_single(port->dev, pdc->buf, PDC_BUFFER_SIZE, DMA_FROM_DEVICE);
@@ -635,6 +729,10 @@
retval = atmel_open_hook(port);
if (retval) {
free_irq(port->irq, port);
+ if (port->mapbase == AT91RM9200_BASE_US0)
+ free_irq(AT91_PIN_PA19, port);
+ if (port->mapbase == AT91RM9200_BASE_US3)
+ free_irq(AT91_PIN_PA24, port);
return retval;
}
}
@@ -694,6 +792,10 @@
* Free the interrupt
*/
free_irq(port->irq, port);
+ if (port->mapbase == AT91RM9200_BASE_US0)
+ free_irq(AT91_PIN_PA19, port);
+ if (port->mapbase == AT91RM9200_BASE_US3)
+ free_irq(AT91_PIN_PA24, port);
/*
* If there is a specific "close" function (to unregister