Midified UART init, added interrupt handlers for DCD lines
SVN-Revision: 7146
This commit is contained in:
Hamish Guthrie
parent
9b27055a6c
commit
9cb95b53f0
2 changed files with 137 additions and 1 deletions
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@ -1,5 +1,5 @@
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--- linux-2.6.19.2.old/drivers/serial/atmel_serial.c 2007-05-01 13:08:03.000000000 +0200
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+++ linux-2.6.19.2/drivers/serial/atmel_serial.c 2007-05-09 10:21:45.000000000 +0200
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+++ linux-2.6.19.2/drivers/serial/atmel_serial.c 2007-05-09 17:13:34.000000000 +0200
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@@ -173,6 +173,34 @@
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at91_set_gpio_value(AT91_PIN_PA21, 0);
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else
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@ -69,3 +69,96 @@
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return ret;
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}
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@@ -510,6 +554,34 @@
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}
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/*
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+ * USART0 DCD Interrupt handler
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+ */
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+
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+static irqreturn_t atmel_u0_DCD_interrupt(int irq, void *dev_id)
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+{
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+ struct uart_port *port = dev_id;
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+ int status = at91_get_gpio_value(irq);
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+
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+ uart_handle_dcd_change(port, !(status));
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+
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+ return IRQ_HANDLED;
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+}
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+
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+/*
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+ * USART3 DCD Interrupt handler
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+ */
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+
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+static irqreturn_t atmel_u3_DCD_interrupt(int irq, void *dev_id)
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+{
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+ struct uart_port *port = dev_id;
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+ int status = at91_get_gpio_value(irq);
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+
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+ uart_handle_dcd_change(port, !(status));
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+
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+ return IRQ_HANDLED;
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+}
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+
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+/*
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* Interrupt handler
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*/
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static irqreturn_t atmel_interrupt(int irq, void *dev_id)
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@@ -586,6 +658,24 @@
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return retval;
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}
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+ if (port->mapbase == AT91RM9200_BASE_US0) {
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+ retval = request_irq(AT91_PIN_PA19, atmel_u0_DCD_interrupt, 0, "atmel_serial", port);
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+ if (retval) {
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+ printk("atmel_serial: atmel_startup - Can't get u0DCD irq\n");
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+ free_irq(port->irq, port);
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+ return retval;
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+ }
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+ }
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+ if (port->mapbase == AT91RM9200_BASE_US3) {
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+ retval = request_irq(AT91_PIN_PA24, atmel_u3_DCD_interrupt, 0, "atmel_serial", port);
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+ if (retval) {
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+ printk("atmel_serial: atmel_startup - Can't get u3DCD irq\n");
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+ free_irq(port->irq, port);
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+ return retval;
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+ }
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+ }
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+
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+
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/*
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* Initialize DMA (if necessary)
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*/
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@@ -602,6 +692,10 @@
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kfree(atmel_port->pdc_rx[0].buf);
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}
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free_irq(port->irq, port);
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+ if (port->mapbase == AT91RM9200_BASE_US0)
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+ free_irq(AT91_PIN_PA19, port);
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+ if (port->mapbase == AT91RM9200_BASE_US3)
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+ free_irq(AT91_PIN_PA24, port);
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return -ENOMEM;
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}
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pdc->dma_addr = dma_map_single(port->dev, pdc->buf, PDC_BUFFER_SIZE, DMA_FROM_DEVICE);
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@@ -635,6 +729,10 @@
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retval = atmel_open_hook(port);
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if (retval) {
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free_irq(port->irq, port);
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+ if (port->mapbase == AT91RM9200_BASE_US0)
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+ free_irq(AT91_PIN_PA19, port);
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+ if (port->mapbase == AT91RM9200_BASE_US3)
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+ free_irq(AT91_PIN_PA24, port);
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return retval;
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}
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}
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@@ -694,6 +792,10 @@
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* Free the interrupt
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*/
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free_irq(port->irq, port);
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+ if (port->mapbase == AT91RM9200_BASE_US0)
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+ free_irq(AT91_PIN_PA19, port);
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+ if (port->mapbase == AT91RM9200_BASE_US3)
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+ free_irq(AT91_PIN_PA24, port);
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/*
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* If there is a specific "close" function (to unregister
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43
target/linux/at91-2.6/patches/009-fdl-uartinit.patch
Normal file
43
target/linux/at91-2.6/patches/009-fdl-uartinit.patch
Normal file
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@ -0,0 +1,43 @@
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diff -urN linux-2.6.19.2.old/arch/arm/mach-at91rm9200/at91rm9200_devices.c linux-2.6.19.2/arch/arm/mach-at91rm9200/at91rm9200_devices.c
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--- linux-2.6.19.2.old/arch/arm/mach-at91rm9200/at91rm9200_devices.c 2007-05-01 13:08:02.000000000 +0200
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+++ linux-2.6.19.2/arch/arm/mach-at91rm9200/at91rm9200_devices.c 2007-05-09 12:59:58.000000000 +0200
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@@ -709,6 +709,10 @@
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* We need to drive the pin manually. Default is off (RTS is active low).
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*/
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at91_set_gpio_output(AT91_PIN_PA21, 1);
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+ at91_set_gpio_output(AT91_PIN_PB6, 1); /* DTR0 */
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+ at91_set_gpio_output(AT91_PIN_PB7, 1); /* RI0 */
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+ at91_set_gpio_input(AT91_PIN_PA19, 1); /* DCD0 */
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+ at91_set_deglitch(AT91_PIN_PA19, 1);
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}
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static struct resource uart1_resources[] = {
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@@ -820,6 +824,12 @@
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{
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at91_set_B_periph(AT91_PIN_PA5, 1); /* TXD3 */
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at91_set_B_periph(AT91_PIN_PA6, 0); /* RXD3 */
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+ at91_set_B_periph(AT91_PIN_PB0, 0); /* RTS3 */
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+ at91_set_B_periph(AT91_PIN_PB1, 0); /* CTS3 */
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+ at91_set_gpio_output(AT91_PIN_PB29, 1); /* DTR0 */
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+ at91_set_gpio_output(AT91_PIN_PB2, 1); /* RI0 */
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+ at91_set_gpio_input(AT91_PIN_PA24, 1); /* DCD0 */
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+ at91_set_deglitch(AT91_PIN_PA24, 1);
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}
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struct platform_device *at91_uarts[ATMEL_MAX_UART]; /* the UARTs to use */
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diff -urN linux-2.6.19.2.old/arch/arm/mach-at91rm9200/vlink_leds.c linux-2.6.19.2/arch/arm/mach-at91rm9200/vlink_leds.c
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--- linux-2.6.19.2.old/arch/arm/mach-at91rm9200/vlink_leds.c 2007-05-01 13:08:03.000000000 +0200
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+++ linux-2.6.19.2/arch/arm/mach-at91rm9200/vlink_leds.c 2007-05-09 12:58:42.000000000 +0200
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@@ -114,12 +114,6 @@
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at91_set_gpio_input(AT91_PIN_PB8, 1); // JIGPRESENT
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at91_set_gpio_input(AT91_PIN_PB22, 1); // PWR_IND
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- at91_set_gpio_input(AT91_PIN_PA19, 1); // P1DTR
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- at91_set_gpio_input(AT91_PIN_PA24, 1); // P2DTR
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- at91_set_gpio_output(AT91_PIN_PB29, 1); // P2DCD
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- at91_set_gpio_output(AT91_PIN_PB2, 1); // P2RI
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- at91_set_gpio_output(AT91_PIN_PB6, 1); // P1DCD
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- at91_set_gpio_output(AT91_PIN_PB7, 1); // P1RI
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at91_set_gpio_input(AT91_PIN_PB27, 1); // UDB_CNX
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at91_set_gpio_output(AT91_PIN_PB28, 1); // UDB_PUP
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