Changeset cfe7716 in mainline for uspace/srv/drivers/serial/serial.c

Timestamp:

2010-04-29T14:13:28Z (14 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

7f8b581

Parents:

953bc1ef

Message:

backup (unstable)

File:

• uspace/srv/drivers/serial/serial.c (modified) (3 diffs)

uspace/srv/drivers/serial/serial.c

@@ -238 +238 @@
 }
 
+static int serial_interrupt_enable(device_t *dev)
+{
+        serial_dev_data_t *data = (serial_dev_data_t *)dev->driver_data;
+        
+        // enable interrupt globally    
+        enable_interrupt(data->irq);
+        
+        // enable interrupt on the serial port
+        pio_write_8(data->port + 1 , 0x01);   // Interrupt when data received
+        pio_write_8(data->port + 4, 0x0B);
+        
+        return EOK;
+}
+
+static void serial_initialize_port(device_t *dev)
+{
+        serial_dev_data_t *data = (serial_dev_data_t *)dev->driver_data;
+        ioport8_t *port = data->port;
+        
+        pio_write_8(port + 1, 0x00);    // Disable all interrupts
+        pio_write_8(port + 3, 0x80);    // Enable DLAB (set baud rate divisor)
+        pio_write_8(port + 0, 0x60);    // Set divisor to 96 (lo byte) 1200 baud
+        pio_write_8(port + 1, 0x00);    //                   (hi byte)
+        pio_write_8(port + 3, 0x07);    // 8 bits, no parity, two stop bits
+        pio_write_8(port + 2, 0xC7);    // Enable FIFO, clear them, with 14-byte threshold
+        pio_write_8(port + 4, 0x0B);    // RTS/DSR set (Request to Send and Data Terminal Ready lines enabled), 
+                                                                        // Aux Output2 set - needed for interrupts      
+}
+
 static int serial_add_device(device_t *dev) 
 {
@@ -250 +279 @@
                 serial_dev_cleanup(dev);
                 return EADDRNOTAVAIL;
-        }
-        
-        
+        }       
+        
+        // find out whether the device is present
         if (!serial_dev_probe(dev)) {
                 serial_dev_cleanup(dev);
@@ -258 +287 @@
         }       
         
-        // TODO interrupt and serial port initialization (baud rate etc.)
+        // serial port initialization (baud rate etc.)
+        serial_initialize_port(dev);
+        
+        // TODO register interrupt handler
+        
+        // enable interrupt
+        if (0 != (res = serial_interrupt_enable(dev))) {
+                serial_dev_cleanup(dev);
+                return res;
+        }               
         
         return EOK;