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

   1 Index: linux-2.6.21.7/drivers/serial/atmel_serial.c
   2 ===================================================================
   3 --- linux-2.6.21.7.orig/drivers/serial/atmel_serial.c
   4 +++ linux-2.6.21.7/drivers/serial/atmel_serial.c
   5 @@ -174,7 +174,35 @@ static void atmel_set_mctrl(struct uart_
   6                                 at91_set_gpio_value(AT91_PIN_PA21, 0);
   7                         else
   8                                 at91_set_gpio_value(AT91_PIN_PA21, 1);
   9 +
  10 +      /*
  11 +       * FDL VersaLink adds GPIOS to provide full modem control on
  12 +       * USART 0 - Drive DTR and RI pins manually
  13 +       */
  14 +      if (mctrl & TIOCM_DTR)
  15 +        at91_set_gpio_value(AT91_PIN_PB6, 0);
  16 +      else
  17 +        at91_set_gpio_value(AT91_PIN_PB6, 1);
  18 +      if (mctrl & TIOCM_RI)
  19 +        at91_set_gpio_value(AT91_PIN_PB7, 0);
  20 +      else
  21 +        at91_set_gpio_value(AT91_PIN_PB7, 1);
  22                 }
  23 +
  24 +    /*
  25 +     * FDL VersaLink adds GPIOS to provide full modem control on
  26 +     * USART 3 - Drive DTR and RI pins manually
  27 +     */
  28 +    if (port->mapbase == AT91RM9200_BASE_US3) {
  29 +      if (mctrl & TIOCM_DTR)
  30 +        at91_set_gpio_value(AT91_PIN_PB29, 0);
  31 +      else
  32 +        at91_set_gpio_value(AT91_PIN_PB29, 1);
  33 +      if (mctrl & TIOCM_RI)
  34 +        at91_set_gpio_value(AT91_PIN_PB2, 0);
  35 +      else
  36 +        at91_set_gpio_value(AT91_PIN_PB2, 1);
  37 +    }
  38         }
  39  #endif
  40
  41 @@ -211,8 +239,10 @@ static u_int atmel_get_mctrl(struct uart
  42         /*
  43          * The control signals are active low.
  44          */
  45 -       if (!(status & ATMEL_US_DCD))
  46 -               ret |= TIOCM_CD;
  47 +
  48 +  if (!(port->mapbase == AT91RM9200_BASE_US0 || port->mapbase == AT91RM9200_BASE_US3))
  49 +               if (!(status & ATMEL_US_DCD))
  50 +                       ret |= TIOCM_CD;
  51         if (!(status & ATMEL_US_CTS))
  52                 ret |= TIOCM_CTS;
  53         if (!(status & ATMEL_US_DSR))
  54 @@ -220,6 +250,16 @@ static u_int atmel_get_mctrl(struct uart
  55         if (!(status & ATMEL_US_RI))
  56                 ret |= TIOCM_RI;
  57
  58 +  /*
  59 +   * Read the GPIO's for the FDL VersaLink special case
  60 +   */
  61 +  if (port->mapbase == AT91RM9200_BASE_US0)
  62 +    if (!(at91_get_gpio_value(AT91_PIN_PA19)))
  63 +      ret |= TIOCM_CD;
  64 +  if (port->mapbase == AT91RM9200_BASE_US3)
  65 +    if (!(at91_get_gpio_value(AT91_PIN_PA24)))
  66 +      ret |= TIOCM_CD;
  67 +
  68         return ret;
  69  }
  70
  71 @@ -511,6 +551,34 @@ static void atmel_tx_chars(struct uart_p
  72  }
  73
  74  /*
  75 + * USART0 DCD Interrupt handler
  76 + */
  77 +
  78 +static irqreturn_t atmel_u0_DCD_interrupt(int irq, void *dev_id)
  79 +{
  80 +  struct uart_port *port = dev_id;
  81 +  int status = at91_get_gpio_value(irq);
  82 +
  83 +  uart_handle_dcd_change(port, !(status));
  84 +
  85 +  return IRQ_HANDLED;
  86 +}
  87 +
  88 +/*
  89 + * USART3 DCD Interrupt handler
  90 + */
  91 +
  92 +static irqreturn_t atmel_u3_DCD_interrupt(int irq, void *dev_id)
  93 +{
  94 +  struct uart_port *port = dev_id;
  95 +  int status = at91_get_gpio_value(irq);
  96 +
  97 +  uart_handle_dcd_change(port, !(status));
  98 +
  99 +  return IRQ_HANDLED;
 100 +}
 101 +
 102 +/*
 103   * Interrupt handler
 104   */
 105  static irqreturn_t atmel_interrupt(int irq, void *dev_id)
 106 @@ -587,6 +655,23 @@ static int atmel_startup(struct uart_por
 107                 return retval;
 108         }
 109
 110 +       if (port->mapbase == AT91RM9200_BASE_US0) {
 111 +               retval = request_irq(AT91_PIN_PA19, atmel_u0_DCD_interrupt, 0, "atmel_serial", port);
 112 +               if (retval) {
 113 +                       printk("atmel_serial: atmel_startup - Can't get u0DCD irq\n");
 114 +                       free_irq(port->irq, port);
 115 +                       return retval;
 116 +               }
 117 +       }
 118 +       if (port->mapbase == AT91RM9200_BASE_US3) {
 119 +               retval = request_irq(AT91_PIN_PA24, atmel_u3_DCD_interrupt, 0, "atmel_serial", port);
 120 +               if (retval) {
 121 +                       printk("atmel_serial: atmel_startup - Can't get u3DCD irq\n");
 122 +                       free_irq(port->irq, port);
 123 +                       return retval;
 124 +               }
 125 +       }
 126 +
 127         /*
 128          * Initialize DMA (if necessary)
 129          */
 130 @@ -603,6 +688,10 @@ static int atmel_startup(struct uart_por
 131                                         kfree(atmel_port->pdc_rx[0].buf);
 132                                 }
 133                                 free_irq(port->irq, port);
 134 +        if (port->mapbase == AT91RM9200_BASE_US0)
 135 +          free_irq(AT91_PIN_PA19, port);
 136 +        if (port->mapbase == AT91RM9200_BASE_US3)
 137 +          free_irq(AT91_PIN_PA24, port);
 138                                 return -ENOMEM;
 139                         }
 140                         pdc->dma_addr = dma_map_single(port->dev, pdc->buf, PDC_BUFFER_SIZE, DMA_FROM_DEVICE);
 141 @@ -636,6 +725,10 @@ static int atmel_startup(struct uart_por
 142                 retval = atmel_open_hook(port);
 143                 if (retval) {
 144                         free_irq(port->irq, port);
 145 +      if (port->mapbase == AT91RM9200_BASE_US0)
 146 +        free_irq(AT91_PIN_PA19, port);
 147 +      if (port->mapbase == AT91RM9200_BASE_US3)
 148 +        free_irq(AT91_PIN_PA24, port);
 149                         return retval;
 150                 }
 151         }
 152 @@ -701,6 +794,10 @@ static void atmel_shutdown(struct uart_p
 153          * Free the interrupt
 154          */
 155         free_irq(port->irq, port);
 156 +  if (port->mapbase == AT91RM9200_BASE_US0)
 157 +    free_irq(AT91_PIN_PA19, port);
 158 +  if (port->mapbase == AT91RM9200_BASE_US3)
 159 +    free_irq(AT91_PIN_PA24, port);
 160
 161         /*
 162          * If there is a specific "close" function (to unregister