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Structure serial driver interface to support different interrupt architectures

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@571 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo 2008-01-26 23:46:09 +00:00
parent 1207968244
commit 8daa5c0f15
1 changed files with 40 additions and 23 deletions
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63
configs/z80sim/src/z80_serial.c
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@ -70,15 +70,16 @@
static int up_setup(struct uart_dev_s *dev);
static void up_shutdown(struct uart_dev_s *dev);
static int up_interrupt(int irq, void *context);
static int up_attach(struct uart_dev_s *dev);
static void up_detach(struct uart_dev_s *dev);
static int up_ioctl(struct file *filep, int cmd, unsigned long arg);
static int up_receive(struct uart_dev_s *dev, uint32 *status);
static void up_rxint(struct uart_dev_s *dev, boolean enable);
static boolean up_rxfifonotempty(struct uart_dev_s *dev);
static boolean up_rxavailable(struct uart_dev_s *dev);
static void up_send(struct uart_dev_s *dev, int ch);
static void up_txint(struct uart_dev_s *dev, boolean enable);
static boolean up_txfifonotfull(struct uart_dev_s *dev);
static boolean up_txfifoempty(struct uart_dev_s *dev);
static boolean up_txready(struct uart_dev_s *dev);
static boolean up_txempty(struct uart_dev_s *dev);
/****************************************************************************
* Private Variables
@ -88,15 +89,16 @@ struct uart_ops_s g_uart_ops =
{
up_setup, /* setup */
up_shutdown, /* shutdown */
up_interrupt, /* handler */
up_attach, /* attach */
up_detach, /* detach */
up_ioctl, /* ioctl */
up_receive, /* receive */
up_rxint, /* rxint */
up_rxfifonotempty, /* rxfifonotempty */
up_rxavailable, /* rxavailable */
up_send, /* send */
up_txint, /* txint */
up_txfifonotfull, /* txfifonotfull */
up_txfifoempty, /* txfifoempty */
up_txready, /* txready */
up_txempty, /* txempty */
};
/* I/O buffers */
@ -109,7 +111,6 @@ static char g_uarttxbuffer[CONFIG_UART_TXBUFSIZE];
static uart_dev_t g_uartport =
{
0, /* open_count */
0, /* irq */
FALSE, /* xmitwaiting */
FALSE, /* recvwaiting */
TRUE, /* isconsole */
@ -167,23 +168,39 @@ static void up_shutdown(struct uart_dev_s *dev)
}
/****************************************************************************
* Name: up_interrupt
* Name: up_attach
*
* Description:
* This is the UART interrupt handler. It will be invoked
* when an interrupt received on the 'irq' It should call
* uart_transmitchars or uart_receivechar to perform the
* appropriate data transfers. The interrupt handling logic\
* must be able to map the 'irq' number into the approprite
* uart_dev_s structure in order to call these functions.
* Configure the UART to operation in interrupt driven mode. This method is
* called when the serial port is opened. Normally, this is just after the
* the setup() method is called, however, the serial console may operate in
* a non-interrupt driven mode during the boot phase.
*
* RX and TX interrupts are not enabled when by the attach method (unless the
* hardware supports multiple levels of interrupt enabling). The RX and TX
* interrupts are not enabled until the txint() and rxint() methods are called.
*
****************************************************************************/
static int up_interrupt(int irq, void *context)
static int up_attach(struct uart_dev_s *dev)
{
return OK;
}
/****************************************************************************
* Name: up_detach
*
* Description:
* Detach UART interrupts. This method is called when the serial port is
* closed normally just before the shutdown method is called. The exception is
* the serial console which is never shutdown.
*
****************************************************************************/
static void up_detach(struct uart_dev_s *dev)
{
}
/****************************************************************************
* Name: up_ioctl
*
@ -228,14 +245,14 @@ static void up_rxint(struct uart_dev_s *dev, boolean enable)
}
/****************************************************************************
* Name: up_rxfifonotempty
* Name: up_rxavailable
*
* Description:
* Return TRUE if the receive fifo is not empty
*
****************************************************************************/
static boolean up_rxfifonotempty(struct uart_dev_s *dev)
static boolean up_rxavailable(struct uart_dev_s *dev)
{
return TRUE;
}
@ -266,27 +283,27 @@ static void up_txint(struct uart_dev_s *dev, boolean enable)
}
/****************************************************************************
* Name: up_txfifonotfull
* Name: up_txready
*
* Description:
* Return TRUE if the tranmsit fifo is not full
*
****************************************************************************/
static boolean up_txfifonotfull(struct uart_dev_s *dev)
static boolean up_txready(struct uart_dev_s *dev)
{
return TRUE;
}
/****************************************************************************
* Name: up_txfifoempty
* Name: up_txempty
*
* Description:
* Return TRUE if the transmit fifo is empty
*
****************************************************************************/
static boolean up_txfifoempty(struct uart_dev_s *dev)
static boolean up_txempty(struct uart_dev_s *dev)
{
return TRUE;
}