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libchip/serial/ns16550.c: Transmit the character in the polled write

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function within a critical section for printk() compatibility.
This commit is contained in:
Thomas Doerfler
2008-11-18 09:20:18 +00:00
parent 1e0f03b529
commit 9151ec6763
2 changed files with 33 additions and 33 deletions
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5
c/src/ChangeLog
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@@ -1,3 +1,8 @@
2008-11-13 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libchip/serial/ns16550.c: Transmit the character in the polled write
function within a critical section for printk() compatibility.
2008-10-02 Sebastian Huber <sebastian.huber@embedded-brains.de> 2008-10-02 Sebastian Huber <sebastian.huber@embedded-brains.de>
* libchip/i2c/spi-sd-card.c: Update for status-checks.h changes. * libchip/i2c/spi-sd-card.c: Update for status-checks.h changes.

61
c/src/libchip/serial/ns16550.c
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@@ -196,44 +196,39 @@ NS16550_STATIC int ns16550_close(
return(RTEMS_SUCCESSFUL); return(RTEMS_SUCCESSFUL);
} }
/* /**
* ns16550_write_polled * @brief Polled write for NS16550.
*/ */
NS16550_STATIC void ns16550_write_polled( int minor, char c)
NS16550_STATIC void ns16550_write_polled(
int minor,
char cChar
)
{ {
uint32_t pNS16550; uint32_t port = Console_Port_Tbl [minor].ulCtrlPort1;
unsigned char ucLineStatus; getRegister_f get = Console_Port_Tbl [minor].getRegister;
getRegister_f getReg; setRegister_f set = Console_Port_Tbl [minor].setRegister;
setRegister_f setReg; uint32_t status;
rtems_interrupt_level level;
pNS16550 = Console_Port_Tbl[minor].ulCtrlPort1; while (1) {
getReg = Console_Port_Tbl[minor].getRegister; /* Try to transmit the character in a critical section */
setReg = Console_Port_Tbl[minor].setRegister; rtems_interrupt_disable( level);
/* /* Read the transmitter holding register and check it */
* wait for transmitter holding register to be empty status = get( port, NS16550_LINE_STATUS);
*/ if ((status & SP_LSR_THOLD) != 0) {
ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS); /* Transmit character */
while ((ucLineStatus & SP_LSR_THOLD) == 0) { set( port, NS16550_TRANSMIT_BUFFER, c);
/*
* Yield while we wait /* Finished */
*/ rtems_interrupt_enable( level);
#if 0 break;
if(_System_state_Is_up(_System_state_Get())) { } else {
rtems_task_wake_after(RTEMS_YIELD_PROCESSOR); rtems_interrupt_enable( level);
} }
#endif
ucLineStatus = (*getReg)(pNS16550, NS16550_LINE_STATUS); /* Wait for transmitter holding register to be empty */
do {
status = get( port, NS16550_LINE_STATUS);
} while ((status & SP_LSR_THOLD) == 0);
} }
/*
* transmit character
*/
(*setReg)(pNS16550, NS16550_TRANSMIT_BUFFER, cChar);
} }
/* /*