target/linux/at91-2.6/patches-2.6.21/008-fdl-serial.patch

   1 --- linux-2.6.21.1.orig/drivers/serial/atmel_serial.c   2007-05-28 12:22:29.000000000 +0200
   2 +++ linux-2.6.21.1/drivers/serial/atmel_serial.c        2007-05-28 16:39:09.000000000 +0200
   3 @@ -174,7 +174,35 @@
   4                                 at91_set_gpio_value(AT91_PIN_PA21, 0);
   5                         else
   6                                 at91_set_gpio_value(AT91_PIN_PA21, 1);
   7 +
   8 +      /*
   9 +       * FDL VersaLink adds GPIOS to provide full modem control on
  10 +       * USART 0 - Drive DTR and RI pins manually
  11 +       */
  12 +      if (mctrl & TIOCM_DTR)
  13 +        at91_set_gpio_value(AT91_PIN_PB6, 0);
  14 +      else
  15 +        at91_set_gpio_value(AT91_PIN_PB6, 1);
  16 +      if (mctrl & TIOCM_RI)
  17 +        at91_set_gpio_value(AT91_PIN_PB7, 0);
  18 +      else
  19 +        at91_set_gpio_value(AT91_PIN_PB7, 1);
  20                 }
  21 +
  22 +    /*
  23 +     * FDL VersaLink adds GPIOS to provide full modem control on
  24 +     * USART 3 - Drive DTR and RI pins manually
  25 +     */
  26 +    if (port->mapbase == AT91RM9200_BASE_US3) {
  27 +      if (mctrl & TIOCM_DTR)
  28 +        at91_set_gpio_value(AT91_PIN_PB29, 0);
  29 +      else
  30 +        at91_set_gpio_value(AT91_PIN_PB29, 1);
  31 +      if (mctrl & TIOCM_RI)
  32 +        at91_set_gpio_value(AT91_PIN_PB2, 0);
  33 +      else
  34 +        at91_set_gpio_value(AT91_PIN_PB2, 1);
  35 +    }
  36         }
  37  #endif
  38
  39 @@ -211,8 +239,10 @@
  40         /*
  41          * The control signals are active low.
  42          */
  43 -       if (!(status & ATMEL_US_DCD))
  44 -               ret |= TIOCM_CD;
  45 +
  46 +  if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
  47 +               if (!(status & ATMEL_US_DCD))
  48 +                       ret |= TIOCM_CD;
  49         if (!(status & ATMEL_US_CTS))
  50                 ret |= TIOCM_CTS;
  51         if (!(status & ATMEL_US_DSR))
  52 @@ -220,6 +250,16 @@
  53         if (!(status & ATMEL_US_RI))
  54                 ret |= TIOCM_RI;
  55
  56 +  /*
  57 +   * Read the GPIO's for the FDL VersaLink special case
  58 +   */
  59 +  if (port->mapbase == AT91RM9200_BASE_US0)
  60 +    if (!(at91_get_gpio_value(AT91_PIN_PA19)))
  61 +      ret |= TIOCM_CD;
  62 +  if (port->mapbase == AT91RM9200_BASE_US3)
  63 +    if (!(at91_get_gpio_value(AT91_PIN_PA24)))
  64 +      ret |= TIOCM_CD;
  65 +
  66         return ret;
  67  }
  68
  69 @@ -511,6 +551,34 @@
  70  }
  71
  72  /*
  73 + * USART0 DCD Interrupt handler
  74 + */
  75 +
  76 +static irqreturn_t atmel_u0_DCD_interrupt(int irq, void *dev_id)
  77 +{
  78 +  struct uart_port *port = dev_id;
  79 +  int status = at91_get_gpio_value(irq);
  80 +
  81 +  uart_handle_dcd_change(port, !(status));
  82 +
  83 +  return IRQ_HANDLED;
  84 +}
  85 +
  86 +/*
  87 + * USART3 DCD Interrupt handler
  88 + */
  89 +
  90 +static irqreturn_t atmel_u3_DCD_interrupt(int irq, void *dev_id)
  91 +{
  92 +  struct uart_port *port = dev_id;
  93 +  int status = at91_get_gpio_value(irq);
  94 +
  95 +  uart_handle_dcd_change(port, !(status));
  96 +
  97 +  return IRQ_HANDLED;
  98 +}
  99 +
 100 +/*
 101   * Interrupt handler
 102   */
 103  static irqreturn_t atmel_interrupt(int irq, void *dev_id)
 104 @@ -587,6 +655,23 @@
 105                 return retval;
 106         }
 107
 108 +       if (port->mapbase == AT91RM9200_BASE_US0) {
 109 +               retval = request_irq(AT91_PIN_PA19, atmel_u0_DCD_interrupt, 0, "atmel_serial", port);
 110 +               if (retval) {
 111 +                       printk("atmel_serial: atmel_startup - Can't get u0DCD irq\n");
 112 +                       free_irq(port->irq, port);
 113 +                       return retval;
 114 +               }
 115 +       }
 116 +       if (port->mapbase == AT91RM9200_BASE_US3) {
 117 +               retval = request_irq(AT91_PIN_PA24, atmel_u3_DCD_interrupt, 0, "atmel_serial", port);
 118 +               if (retval) {
 119 +                       printk("atmel_serial: atmel_startup - Can't get u3DCD irq\n");
 120 +                       free_irq(port->irq, port);
 121 +                       return retval;
 122 +               }
 123 +       }
 124 +
 125         /*
 126          * Initialize DMA (if necessary)
 127          */
 128 @@ -603,6 +688,10 @@
 129                                         kfree(atmel_port->pdc_rx[0].buf);
 130                                 }
 131                                 free_irq(port->irq, port);
 132 +        if (port->mapbase == AT91RM9200_BASE_US0)
 133 +          free_irq(AT91_PIN_PA19, port);
 134 +        if (port->mapbase == AT91RM9200_BASE_US3)
 135 +          free_irq(AT91_PIN_PA24, port);
 136                                 return -ENOMEM;
 137                         }
 138                         pdc->dma_addr = dma_map_single(port->dev, pdc->buf, PDC_BUFFER_SIZE, DMA_FROM_DEVICE);
 139 @@ -636,6 +725,10 @@
 140                 retval = atmel_open_hook(port);
 141                 if (retval) {
 142                         free_irq(port->irq, port);
 143 +      if (port->mapbase == AT91RM9200_BASE_US0)
 144 +        free_irq(AT91_PIN_PA19, port);
 145 +      if (port->mapbase == AT91RM9200_BASE_US3)
 146 +        free_irq(AT91_PIN_PA24, port);
 147                         return retval;
 148                 }
 149         }
 150 @@ -701,6 +794,10 @@
 151          * Free the interrupt
 152          */
 153         free_irq(port->irq, port);
 154 +  if (port->mapbase == AT91RM9200_BASE_US0)
 155 +    free_irq(AT91_PIN_PA19, port);
 156 +  if (port->mapbase == AT91RM9200_BASE_US3)
 157 +    free_irq(AT91_PIN_PA24, port);
 158
 159         /*
 160          * If there is a specific "close" function (to unregister