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Include required header files. Removed support for old PowerPC exception handling. Various fixes for interrupt related routines. Added support for BSPs with IRQ extension API.

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This commit is contained in:
Thomas Doerfler
2008-09-22 11:46:15 +00:00
parent 31c14d9043
commit e97e0e0886
3 changed files with 130 additions and 146 deletions
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270
c/src/libchip/serial/ns16550.c
View File

@@ -20,16 +20,33 @@
* This driver uses the termios pseudo driver.
*/
#include <stdlib.h>
#include <rtems.h>
#include <rtems/libio.h>
#include <stdlib.h>
#include <rtems/ringbuf.h>
#include <rtems/bspIo.h>
#include <libchip/serial.h>
#include <libchip/sersupp.h>
#include <rtems/bspIo.h>
#include <bsp/irq.h>
#include "ns16550_p.h"
#ifdef BSP_FEATURE_IRQ_EXTENSION
/* Nothing to do */
#elif defined BSP_FEATURE_IRQ_LEGACY
/* Nothing to do */
#elif defined __PPC__
#define BSP_FEATURE_IRQ_LEGACY
#ifdef BSP_SHARED_HANDLER_SUPPORT
#define BSP_FEATURE_IRQ_LEGACY_SHARED_HANDLER_SUPPORT
#endif
#else
#warning No interrupt support available
#endif
/*
* Flow control is only supported when using interrupts
*/
@@ -68,14 +85,6 @@ console_fns ns16550_fns_polled = {
false /* deviceOutputUsesInterrupts */
};
#if defined(__PPC__)
#ifdef _OLD_EXCEPTIONS
extern void set_vector( rtems_isr_entry, rtems_vector_number, int );
#else
#include <bsp/irq.h>
#endif
#endif
/*
* ns16550_init
*/
@@ -92,6 +101,11 @@ NS16550_STATIC void ns16550_init(int minor)
pns16550Context=(ns16550_context *)malloc(sizeof(ns16550_context));
if (pns16550Context == NULL) {
printk( "%s: Error: Not enough memory\n", __func__);
rtems_fatal_error_occurred( 0xdeadbeef);
}
Console_Port_Data[minor].pDeviceContext=(void *)pns16550Context;
pns16550Context->ucModemCtrl=SP_MODEM_IRQ;
@@ -117,8 +131,8 @@ NS16550_STATIC void ns16550_init(int minor)
(*setReg)(pNS16550, NS16550_LINE_CONTROL, ucDataByte);
/* XXX */
(*setReg)(pNS16550, NS16550_TRANSMIT_BUFFER, ulBaudDivisor&0xff);
(*setReg)(pNS16550, NS16550_INTERRUPT_ENABLE, (ulBaudDivisor>>8)&0xff);
(*setReg)(pNS16550, NS16550_TRANSMIT_BUFFER, (uint8_t) (ulBaudDivisor & 0xffU));
(*setReg)(pNS16550, NS16550_INTERRUPT_ENABLE, (uint8_t) ((ulBaudDivisor >> 8) & 0xffU));
/* Clear the divisor latch and set the character size to eight bits */
/* with one stop bit and no parity checking. */
@@ -441,10 +455,11 @@ NS16550_STATIC int ns16550_set_attributes(
* This routine is the console interrupt handler for A port.
*/
NS16550_STATIC void ns16550_process(
int minor
)
NS16550_STATIC void ns16550_process( int minor)
{
console_tbl *c = &Console_Port_Tbl [minor];
console_data *d = &Console_Port_Data [minor];
uint32_t pNS16550;
volatile uint8_t ucLineStatus;
volatile uint8_t ucInterruptId;
@@ -452,22 +467,22 @@ NS16550_STATIC void ns16550_process(
getRegister_f getReg;
setRegister_f setReg;
pNS16550 = Console_Port_Tbl[minor].ulCtrlPort1;
getReg = Console_Port_Tbl[minor].getRegister;
setReg = Console_Port_Tbl[minor].setRegister;
pNS16550 = c->ulCtrlPort1;
getReg = c->getRegister;
setReg = c->setRegister;
do {
/*
* Deal with any received characters
*/
while(true) {
while (true) {
ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS);
if(~ucLineStatus & SP_LSR_RDY) {
if (~ucLineStatus & SP_LSR_RDY) {
break;
}
cChar = (*getReg)(pNS16550, NS16550_RECEIVE_BUFFER);
rtems_termios_enqueue_raw_characters(
Console_Port_Data[minor].termios_data,
d->termios_data,
&cChar,
1
);
@@ -477,82 +492,31 @@ NS16550_STATIC void ns16550_process(
* TX all the characters we can
*/
while(true) {
ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS);
if(~ucLineStatus & SP_LSR_THOLD) {
/*
* We'll get another interrupt when
* the transmitter holding reg. becomes
* free again
*/
break;
}
#if 0
/* XXX flow control not completely supported in libchip */
if(Console_Port_Tbl[minor].pDeviceFlow != &ns16550_flow_RTSCTS) {
ns16550_negate_RTS(minor);
}
#endif
rtems_termios_dequeue_characters(Console_Port_Data[minor].termios_data, 1);
if (rtems_termios_dequeue_characters(
Console_Port_Data[minor].termios_data, 1)) {
if (Console_Port_Tbl[minor].pDeviceFlow != &ns16550_flow_RTSCTS) {
ns16550_negate_RTS(minor);
}
Console_Port_Data[minor].bActive = FALSE;
ns16550_enable_interrupts(minor, NS16550_ENABLE_ALL_INTR_EXCEPT_TX);
while (true) {
ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS);
if (~ucLineStatus & SP_LSR_THOLD) {
/*
* We'll get another interrupt when
* the transmitter holding reg. becomes
* free again
*/
break;
}
ucInterruptId = (*getReg)(pNS16550, NS16550_INTERRUPT_ID);
if (rtems_termios_dequeue_characters( d->termios_data, 1) == 0) {
if (c->pDeviceFlow != &ns16550_flow_RTSCTS) {
ns16550_negate_RTS(minor);
}
d->bActive = false;
ns16550_enable_interrupts(minor, NS16550_ENABLE_ALL_INTR_EXCEPT_TX);
break;
}
}
ucInterruptId = (*getReg)(pNS16550, NS16550_INTERRUPT_ID);
} while((ucInterruptId&0xf)!=0x1);
}
#if defined(__PPC__)
#ifdef _OLD_EXCEPTIONS
/*
* ns16550_isr
*/
NS16550_STATIC rtems_isr ns16550_isr(
rtems_vector_number vector
)
{
int minor;
for(minor=0;minor<Console_Port_Count;minor++) {
if(Console_Port_Tbl[minor].ulIntVector == vector &&
Console_Port_Tbl[minor].deviceType == SERIAL_NS16550 ) {
ns16550_process(minor);
}
}
}
#else
NS16550_STATIC rtems_isr ns16550_isr(
void *entry
)
{
console_tbl *ptr = entry;
int minor;
for(minor=0;minor<Console_Port_Count;minor++) {
if( &Console_Port_Tbl[minor] == ptr ) {
ns16550_process(minor);
}
}
}
#endif
#endif
/*
* ns16550_enable_interrupts
*
@@ -573,67 +537,87 @@ NS16550_STATIC void ns16550_enable_interrupts(
(*setReg)(pNS16550, NS16550_INTERRUPT_ENABLE, mask);
}
#ifdef BSP_FEATURE_IRQ_EXTENSION
NS16550_STATIC void ns16550_isr( rtems_vector_number vector, void *arg)
{
int minor = (int) arg;
ns16550_process( minor);
}
#elif defined BSP_FEATURE_IRQ_LEGACY
NS16550_STATIC rtems_isr ns16550_isr( void *arg)
{
int minor = (int) arg;
ns16550_process( minor);
}
#endif
/*
* ns16550_initialize_interrupts
*
* This routine initializes the port to operate in interrupt driver mode.
*/
#if defined(__PPC__)
#ifdef _OLD_EXCEPTIONS
NS16550_STATIC void ns16550_initialize_interrupts(int minor)
NS16550_STATIC void ns16550_initialize_interrupts( int minor)
{
ns16550_init(minor);
console_tbl *c = &Console_Port_Tbl [minor];
console_data *d = &Console_Port_Data [minor];
Console_Port_Data[minor].bActive = FALSE;
ns16550_init( minor);
set_vector(ns16550_isr, Console_Port_Tbl[minor].ulIntVector, 1);
d->bActive = false;
#ifdef BSP_FEATURE_IRQ_EXTENSION
{
rtems_status_code sc = RTEMS_SUCCESSFUL;
sc = rtems_interrupt_handler_install(
c->ulIntVector,
"NS16550",
RTEMS_INTERRUPT_SHARED,
ns16550_isr,
(void *) minor
);
if (sc != RTEMS_SUCCESSFUL) {
/* FIXME */
printk( "%s: Error: Install interrupt handler\n", __func__);
rtems_fatal_error_occurred( 0xdeadbeef);
}
}
#elif defined BSP_FEATURE_IRQ_LEGACY
{
int rv = 0;
#ifdef BSP_FEATURE_IRQ_LEGACY_SHARED_HANDLER_SUPPORT
rtems_irq_connect_data cd = {
c->ulIntVector,
ns16550_isr,
(void *) minor
NULL,
NULL,
NULL,
NULL
};
rv = BSP_install_rtems_shared_irq_handler( &cd);
#else
rtems_irq_connect_data cd = {
c->ulIntVector,
ns16550_isr,
(void *) minor
NULL,
NULL,
NULL
};
rv = BSP_install_rtems_irq_handler( &cd);
#endif
if (rv == 0) {
/* FIXME */
printk( "%s: Error: Install interrupt handler\n", __func__);
rtems_fatal_error_occurred( 0xdeadbeef);
}
}
#endif
ns16550_enable_interrupts(minor, NS16550_ENABLE_ALL_INTR);
ns16550_enable_interrupts( minor, NS16550_ENABLE_ALL_INTR_EXCEPT_TX);
}
#else
NS16550_STATIC void ns16550_initialize_interrupts(int minor)
{
#ifdef BSP_SHARED_HANDLER_SUPPORT
rtems_irq_connect_data IrqData = {0,
ns16550_isr,
&Console_Port_Data[minor],
NULL,
NULL,
NULL,
NULL
};
#else
rtems_irq_connect_data IrqData = {0,
ns16550_isr,
&Console_Port_Data[minor],
NULL,
NULL,
NULL
};
#endif
ns16550_init(minor);
Console_Port_Data[minor].bActive = FALSE;
IrqData.name = (rtems_irq_number)(Console_Port_Tbl[minor].ulIntVector );
#ifdef BSP_SHARED_HANDLER_SUPPORT
if (!BSP_install_rtems_shared_irq_handler (&IrqData)) {
#else
if (!BSP_install_rtems_irq_handler(&IrqData)) {
#endif
printk("Error installing interrupt handler!\n");
rtems_fatal_error_occurred(1);
}
ns16550_enable_interrupts(minor, NS16550_ENABLE_ALL_INTR);
}
#endif
#endif
/*
* ns16550_write_support_int
@@ -667,8 +651,8 @@ NS16550_STATIC int ns16550_write_support_int(
}
rtems_interrupt_disable(Irql);
if ( Console_Port_Data[minor].bActive == FALSE) {
Console_Port_Data[minor].bActive = TRUE;
if ( Console_Port_Data[minor].bActive == false) {
Console_Port_Data[minor].bActive = true;
ns16550_enable_interrupts(minor, NS16550_ENABLE_ALL_INTR);
}
(*setReg)(pNS16550, NS16550_TRANSMIT_BUFFER, *buf);

4
c/src/libchip/serial/ns16550_p.h
View File

@@ -27,9 +27,7 @@ extern "C" {
* will show up in the symbol table.
*/
#define NS16550_STATIC
/* #define NS16550_STATIC static */
#define NS16550_STATIC static
/*
* Define serial port read registers structure.

2
c/src/libchip/serial/serial.h
View File

@@ -16,6 +16,8 @@
#ifndef __LIBCHIP_SERIAL_h
#define __LIBCHIP_SERIAL_h
#include <stdint.h>
#include <stdbool.h>
#include <termios.h>
/*