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 17:13:34.000000000 +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
  72 @@ -510,6 +554,34 @@
  73  }
  74
  75  /*
  76 + * USART0 DCD Interrupt handler
  77 + */
  78 +
  79 +static irqreturn_t atmel_u0_DCD_interrupt(int irq, void *dev_id)
  80 +{
  81 +       struct uart_port *port = dev_id;
  82 +       int status = at91_get_gpio_value(irq);
  83 +
  84 +       uart_handle_dcd_change(port, !(status));
  85 +
  86 +       return IRQ_HANDLED;
  87 +}
  88 +
  89 +/*
  90 + * USART3 DCD Interrupt handler
  91 + */
  92 +
  93 +static irqreturn_t atmel_u3_DCD_interrupt(int irq, void *dev_id)
  94 +{
  95 +       struct uart_port *port = dev_id;
  96 +       int status = at91_get_gpio_value(irq);
  97 +
  98 +       uart_handle_dcd_change(port, !(status));
  99 +
 100 +       return IRQ_HANDLED;
 101 +}
 102 +
 103 +/*
 104   * Interrupt handler
 105   */
 106  static irqreturn_t atmel_interrupt(int irq, void *dev_id)
 107 @@ -586,6 +658,24 @@
 108                 return retval;
 109         }
 110
 111 +       if (port->mapbase == AT91RM9200_BASE_US0) {
 112 +               retval = request_irq(AT91_PIN_PA19, atmel_u0_DCD_interrupt, 0, "atmel_serial", port);
 113 +               if (retval) {
 114 +                       printk("atmel_serial: atmel_startup - Can't get u0DCD irq\n");
 115 +                       free_irq(port->irq, port);
 116 +                       return retval;
 117 +               }
 118 +       }
 119 +       if (port->mapbase == AT91RM9200_BASE_US3) {
 120 +               retval = request_irq(AT91_PIN_PA24, atmel_u3_DCD_interrupt, 0, "atmel_serial", port);
 121 +               if (retval) {
 122 +                       printk("atmel_serial: atmel_startup - Can't get u3DCD irq\n");
 123 +                       free_irq(port->irq, port);
 124 +                       return retval;
 125 +               }
 126 +       }
 127 +
 128 +
 129         /*
 130          * Initialize DMA (if necessary)
 131          */
 132 @@ -602,6 +692,10 @@
 133                                         kfree(atmel_port->pdc_rx[0].buf);
 134                                 }
 135                                 free_irq(port->irq, port);
 136 +                               if (port->mapbase == AT91RM9200_BASE_US0)
 137 +                                       free_irq(AT91_PIN_PA19, port);
 138 +                               if (port->mapbase == AT91RM9200_BASE_US3)
 139 +                                       free_irq(AT91_PIN_PA24, port);
 140                                 return -ENOMEM;
 141                         }
 142                         pdc->dma_addr = dma_map_single(port->dev, pdc->buf, PDC_BUFFER_SIZE, DMA_FROM_DEVICE);
 143 @@ -635,6 +729,10 @@
 144                 retval = atmel_open_hook(port);
 145                 if (retval) {
 146                         free_irq(port->irq, port);
 147 +                       if (port->mapbase == AT91RM9200_BASE_US0)
 148 +                               free_irq(AT91_PIN_PA19, port);
 149 +                       if (port->mapbase == AT91RM9200_BASE_US3)
 150 +                               free_irq(AT91_PIN_PA24, port);
 151                         return retval;
 152                 }
 153         }
 154 @@ -694,6 +792,10 @@
 155          * Free the interrupt
 156          */
 157         free_irq(port->irq, port);
 158 +       if (port->mapbase == AT91RM9200_BASE_US0)
 159 +               free_irq(AT91_PIN_PA19, port);
 160 +       if (port->mapbase == AT91RM9200_BASE_US3)
 161 +               free_irq(AT91_PIN_PA24, port);
 162
 163         /*
 164          * If there is a specific "close" function (to unregister