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LEON3: added TX-wait-complete and CR on NL support for UART

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Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>
This commit is contained in:
Daniel Hellstrom
2012-04-19 15:21:25 +02:00
committed by Gedare Bloom
parent 605b4b649d
commit 5d48037f83
2 changed files with 23 additions and 6 deletions
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11
c/src/lib/libbsp/sparc/leon3/console/console.c
View File

@@ -50,8 +50,11 @@ int syscon_uart_index __attribute__((weak)) = 0;
extern void apbuart_outbyte_polled(
ambapp_apb_uart *regs,
char ch
);
unsigned char ch,
int do_cr_on_newline,
int wait_sent
);
/* body is in debugputs.c */
@@ -156,7 +159,7 @@ ssize_t console_write_polled(int minor, const char *buf, size_t len)
port = minor - 1;
while (nwrite < len) {
apbuart_outbyte_polled(apbuarts[port].regs, *buf++);
apbuart_outbyte_polled(apbuarts[port].regs, *buf++, 1, 0);
nwrite++;
}
return nwrite;
@@ -323,7 +326,7 @@ rtems_device_driver console_initialize(
* On a MP system one should not open UARTs that other OS instances use.
*/
if (syscon_uart_index < uarts) {
status = rtems_io_register_name( "/dev/console", major, 0 );
status = rtems_io_register_name("/dev/console", major, 0);
if (status != RTEMS_SUCCESSFUL)
rtems_fatal_error_occurred(status);
}

18
c/src/lib/libbsp/sparc/leon3/console/debugputs.c
View File

@@ -89,9 +89,12 @@ int bsp_debug_uart_init(void)
*/
void apbuart_outbyte_polled(
ambapp_apb_uart *regs,
unsigned char ch
unsigned char ch,
int do_cr_on_newline,
int wait_sent
)
{
send:
while ( (regs->status & LEON_REG_UART_STATUS_THE) == 0 ) {
/* Lower bus utilization while waiting for UART */
asm volatile ("nop"::); asm volatile ("nop"::);
@@ -100,6 +103,17 @@ void apbuart_outbyte_polled(
asm volatile ("nop"::); asm volatile ("nop"::);
}
regs->data = (unsigned int) ch;
if ((ch == '\n') && do_cr_on_newline) {
ch = '\r';
goto send;
}
/* Wait until the character has been sent? */
if (wait_sent) {
while ((regs->status & LEON_REG_UART_STATUS_THE) == 0)
;
}
}
/*
@@ -129,7 +143,7 @@ static void bsp_out_char(char c)
return;
}
apbuart_outbyte_polled(dbg_uart, c);
apbuart_outbyte_polled(dbg_uart, c, 1, 1);
}
/*