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

   1 --- linux-2.6.19.2.old/drivers/serial/atmel_serial.c    2007-05-01 13:08:03.000000000 +0200
   2 +++ linux-2.6.19.2/drivers/serial/atmel_serial.c        2007-05-09 10:21:45.000000000 +0200
   3 @@ -173,6 +173,34 @@
   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 @@ -210,8 +238,14 @@
  39         /*
  40          * The control signals are active low.
  41          */
  42 -       if (!(status & ATMEL_US_DCD))
  43 -               ret |= TIOCM_CD;
  44 +
  45 +       /*
  46 +        * Ignore DCD reister for USARTS 0 and 3 as FDL Versalink uses
  47 +        * GPIO's for these signals
  48 +        */
  49 +       if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
  50 +               if (!(status & ATMEL_US_DCD))
  51 +                       ret |= TIOCM_CD;
  52         if (!(status & ATMEL_US_CTS))
  53                 ret |= TIOCM_CTS;
  54         if (!(status & ATMEL_US_DSR))
  55 @@ -219,6 +253,16 @@
  56         if (!(status & ATMEL_US_RI))
  57                 ret |= TIOCM_RI;
  58
  59 +       /*
  60 +        * Read the GPIO's for the FDL VersaLink special case
  61 +        */
  62 +       if (port->mapbase == AT91RM9200_BASE_US0)
  63 +               if (!(at91_get_gpio_value(AT91_PIN_PA19)))
  64 +                       ret |= TIOCM_CD;
  65 +       if (port->mapbase == AT91RM9200_BASE_US3)
  66 +               if (!(at91_get_gpio_value(AT91_PIN_PA24)))
  67 +                       ret |= TIOCM_CD;
  68 +
  69         return ret;
  70  }
  71