kernel/fiasco/src/lib/uart/ppc32/uart_of.cc

   1 #include "uart_of.h"
   2
   3 namespace L4 {
   4
   5         bool Uart_of::startup(unsigned long)
   6         {
   7                 char path[64], type[16];
   8                 for(phandle_t node = 0; prom_next_node(&node); ) {
   9                         prom_getprop(node, "device_type", type, sizeof(type));
  10
  11                         if(strcmp(type, "serial"))
  12                                 continue;
  13
  14                         if(prom_call("package-to-path", 3, 1, node, path, sizeof(path))
  15                            == PROM_ERROR)
  16                                 return false;
  17
  18                         /* open port */
  19                         unsigned prom_ret;
  20                         if((prom_ret = prom_call("open", 1, 1, path)) == PROM_ERROR)
  21                                 return false;
  22                         _serial = (ihandle_t)prom_ret;
  23                         break;
  24                 }
  25
  26                 return (!_serial)?false:true;
  27         }
  28
  29         void Uart_of::shutdown()
  30         {
  31                 prom_call("close", 1, 0, _serial);
  32         }
  33
  34         int Uart_of::get_char(bool blocking) const
  35         {
  36                 int c, len = 0;
  37
  38                 while(len != 1 && blocking)
  39                         len = prom_call("read", 3, 1, _serial, &c, 1);
  40
  41                 return (len)?c:-1;
  42         }
  43
  44         int Uart_of::write(char const *s, unsigned long count) const
  45         {
  46                 return prom_call("write", 3, 1, _serial, s, count);
  47         }
  48
  49         void Uart_of::out_char(char c) const
  50         {
  51                 prom_call("write", 3, 0, _serial, c, 1);
  52         }
  53
  54                 /* UNIMPLEMENTED */
  55         bool Uart_of::enable_rx_irq(bool){return true;}
  56         bool Uart_of::enable_tx_irq(bool){return true;}
  57         bool Uart_of::change_mode(Transfer_mode, Baud_rate){return true;}
  58         int  Uart_of::char_avail() const {return 1;}
  59 };