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162 lines
4.4 KiB
Diff
162 lines
4.4 KiB
Diff
--- a/drivers/serial/atmel_serial.c
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+++ b/drivers/serial/atmel_serial.c
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@@ -214,6 +214,34 @@ static void atmel_set_mctrl(struct uart_
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at91_set_gpio_value(AT91_PIN_PA21, 0);
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else
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at91_set_gpio_value(AT91_PIN_PA21, 1);
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+
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+ /*
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+ * FDL VersaLink adds GPIOS to provide full modem
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+ * control on USART 0 - Drive DTR and RI pins manually
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+ */
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+ if (mctrl & TIOCM_DTR)
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+ at91_set_gpio_value(AT91_PIN_PB6, 0);
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+ else
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+ at91_set_gpio_value(AT91_PIN_PB6, 1);
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+ if (mctrl & TIOCM_RI)
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+ at91_set_gpio_value(AT91_PIN_PB7, 0);
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+ else
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+ at91_set_gpio_value(AT91_PIN_PB7, 1);
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+ }
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+
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+ /*
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+ * FDL VersaLink adds GPIOS to provide full modem control on
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+ * USART 3 - Drive DTR and RI pins manually
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+ */
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+ if (port->mapbase == AT91RM9200_BASE_US3) {
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+ if (mctrl & TIOCM_DTR)
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+ at91_set_gpio_value(AT91_PIN_PB29, 0);
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+ else
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+ at91_set_gpio_value(AT91_PIN_PB29, 1);
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+ if (mctrl & TIOCM_RI)
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+ at91_set_gpio_value(AT91_PIN_PB2, 0);
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+ else
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+ at91_set_gpio_value(AT91_PIN_PB2, 1);
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}
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}
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#endif
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@@ -251,8 +279,10 @@ static u_int atmel_get_mctrl(struct uart
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/*
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* The control signals are active low.
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*/
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- if (!(status & ATMEL_US_DCD))
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- ret |= TIOCM_CD;
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+
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+ if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
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+ if (!(status & ATMEL_US_DCD))
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+ ret |= TIOCM_CD;
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if (!(status & ATMEL_US_CTS))
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ret |= TIOCM_CTS;
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if (!(status & ATMEL_US_DSR))
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@@ -260,6 +290,16 @@ static u_int atmel_get_mctrl(struct uart
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if (!(status & ATMEL_US_RI))
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ret |= TIOCM_RI;
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+ /*
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+ * Read the GPIO's for the FDL VersaLink special case
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+ */
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+ if (port->mapbase == AT91RM9200_BASE_US0)
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+ if (!(at91_get_gpio_value(AT91_PIN_PA19)))
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+ ret |= TIOCM_CD;
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+ if (port->mapbase == AT91RM9200_BASE_US3)
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+ if (!(at91_get_gpio_value(AT91_PIN_PA24)))
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+ ret |= TIOCM_CD;
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+
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return ret;
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}
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@@ -453,6 +493,34 @@ static void atmel_tx_chars(struct uart_p
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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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* receive interrupt handler.
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*/
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static void
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@@ -815,6 +883,23 @@ static int atmel_startup(struct uart_por
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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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* Initialize DMA (if necessary)
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*/
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@@ -834,6 +919,10 @@ static int atmel_startup(struct uart_por
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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,
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@@ -873,7 +962,11 @@ static int atmel_startup(struct uart_por
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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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- return retval;
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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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@@ -947,6 +1040,10 @@ static void atmel_shutdown(struct uart_p
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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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