sysadmin/ipxe
1
0
Fork 0
mirror of https://github.com/ipxe/ipxe synced 2025-12-06 17:30:26 +03:00
Code Issues Packages Projects Releases Wiki Activity

[uart] Make baud rate a property of the UART

Browse Source 
Make the current baud rate (if specified) a property of the UART, to
allow the default_serial_console() function to specify the default
baud rate as well as the default UART device.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2025-11-05 12:16:22 +00:00
parent a786c8d231
commit 08d4d7fe9d
5 changed files with 23 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/core/gdbserial.c
View File

@@ -95,7 +95,9 @@ struct gdb_transport * gdbserial_configure ( const char *name,
return NULL;
uart_get ( gdbserial_uart );
if ( ( rc = uart_init ( gdbserial_uart, baud ) ) != 0 )
gdbserial_uart->baud = baud;
if ( ( rc = uart_init ( gdbserial_uart ) ) != 0 )
return NULL;
return &serial_gdb_transport;

14
src/core/serial.c
View File

@@ -74,8 +74,14 @@ struct uart *serial_console = NULL;
* @ret uart Serial console UART, or NULL
*/
static struct uart * serial_comconsole ( void ) {
struct uart *uart = COMCONSOLE;
unsigned int baud = COMSPEED;
return COMCONSOLE;
/* Set default baud rate, if applicable */
if ( uart && baud )
uart->baud = baud;
return uart;
}
/**
@@ -154,9 +160,9 @@ static void serial_init ( void ) {
return;
/* Initialise UART */
if ( ( rc = uart_init ( uart, COMSPEED ) ) != 0 ) {
DBGC ( uart, "SERIAL could not initialise %s baud %d: %s\n",
uart->name, COMSPEED, strerror ( rc ) );
if ( ( rc = uart_init ( uart ) ) != 0 ) {
DBGC ( uart, "SERIAL could not initialise %s: %s\n",
uart->name, strerror ( rc ) );
return;
}

3
src/core/uart.c
View File

@@ -49,8 +49,7 @@ static uint8_t null_uart_receive ( struct uart *uart __unused ) {
return 0;
}
static int null_uart_init ( struct uart *uart __unused,
unsigned int baud __unused ) {
static int null_uart_init ( struct uart *uart __unused ) {
return 0;
}

7
src/drivers/uart/ns16550.c
View File

@@ -115,10 +115,9 @@ static void ns16550_flush ( struct uart *uart ) {
* Initialise UART
*
* @v uart UART
* @v baud Baud rate, or zero to leave unchanged
* @ret rc Return status code
*/
static int ns16550_init ( struct uart *uart, unsigned int baud ) {
static int ns16550_init ( struct uart *uart ) {
struct ns16550_uart *ns16550 = uart->priv;
uint8_t dlm;
uint8_t dll;
@@ -137,8 +136,8 @@ static int ns16550_init ( struct uart *uart, unsigned int baud ) {
/* Configure divisor and line control register, if applicable */
ns16550_write ( ns16550, NS16550_LCR,
( NS16550_LCR_8N1 | NS16550_LCR_DLAB ) );
if ( baud ) {
ns16550->divisor = ( ( ns16550->clock / baud ) /
if ( uart->baud ) {
ns16550->divisor = ( ( ns16550->clock / uart->baud ) /
NS16550_CLK_BIT );
dlm = ( ( ns16550->divisor >> 8 ) & 0xff );
dll = ( ( ns16550->divisor >> 0 ) & 0xff );

11
src/include/ipxe/uart.h
View File

@@ -22,6 +22,9 @@ struct uart {
/** List of registered UARTs */
struct list_head list;
/** Baud rate (if specified) */
unsigned int baud;
/** UART operations */
struct uart_operations *op;
/** Driver-private data */
@@ -56,10 +59,9 @@ struct uart_operations {
* Initialise UART
*
* @v uart UART
* @v baud Baud rate, or zero to leave unchanged
* @ret rc Return status code
*/
int ( * init ) ( struct uart *uart, unsigned int baud );
int ( * init ) ( struct uart *uart );
/**
* Flush transmitted data
*
@@ -109,13 +111,12 @@ uart_receive ( struct uart *uart ) {
* Initialise UART
*
* @v uart UART
* @v baud Baud rate, or zero to leave unchanged
* @ret rc Return status code
*/
static inline __attribute__ (( always_inline )) int
uart_init ( struct uart *uart, unsigned int baud ) {
uart_init ( struct uart *uart ) {
return uart->op->init ( uart, baud );
return uart->op->init ( uart );
}
/**