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serial: bfin: Flip the jtag serial console to CONFIG_SERIAL_MULTI 

Rework the emulation of serial console via JTAG from simple ad-hoc
implementation of serial port routines to CONFIG_SERIAL_MULTI and
enable CONFIG_SERIAL_MULTI unconditionally for blackfin.

In order for the JTAG serial console to take precedence over all
other serial ports available in system, implement override for
default_serial_console call returning this JTAG serial console.

This brings in a bit of a growth of size, but eventually will allow
us to unconditionally enable CONFIG_SERIAL_MULTI throughout the whole
U-Boot and maintain only one serial subsystem.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marek Vasut <marek.vasut@gmail.com>
Cc: Tom Rini <trini@ti.com>
Cc: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Marek Vasut 2012-09-13 00:02:54 +02:00 committed by Tom Rini
parent 425101e115
commit 41651cab97
3 changed files with 33 additions and 8 deletions
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37
arch/blackfin/cpu/jtag-console.c
View File

@ -194,12 +194,35 @@ int drv_jtag_console_init(void)
}
#ifdef CONFIG_UART_CONSOLE_IS_JTAG
#include <serial.h>
/* Since the JTAG is always available (at power on), allow it to fake a UART */
void serial_set_baud(uint32_t baud) {}
void serial_setbrg(void) {}
int serial_init(void) { return 0; }
void serial_putc(const char c) __attribute__((alias("jtag_putc")));
void serial_puts(const char *s) __attribute__((alias("jtag_puts")));
int serial_tstc(void) __attribute__((alias("jtag_tstc")));
int serial_getc(void) __attribute__((alias("jtag_getc")));
void jtag_serial_setbrg(void)
{
}
int jtag_serial_init(void)
{
return 0;
}
static struct serial_device serial_jtag_drv = {
.name = "jtag",
.start = jtag_serial_init,
.stop = NULL,
.setbrg = jtag_serial_setbrg,
.putc = jtag_putc,
.puts = jtag_puts,
.tstc = jtag_tstc,
.getc = jtag_getc,
};
void bfin_jtag_initialize(void)
{
serial_register(&serial_jtag_drv);
}
struct serial_device *default_serial_console(void)
{
return &serial_jtag_drv;
}
#endif

2
common/serial.c
View File

@ -47,6 +47,7 @@ serial_initfunc(s3c24xx_serial_initialize);
serial_initfunc(s5p_serial_initialize);
serial_initfunc(zynq_serial_initalize);
serial_initfunc(bfin_serial_initialize);
serial_initfunc(bfin_jtag_initialize);
serial_initfunc(mpc512x_serial_initialize);
serial_initfunc(uartlite_serial_initialize);
@ -74,6 +75,7 @@ void serial_initialize(void)
s5p_serial_initialize();
mpc512x_serial_initialize();
bfin_serial_initialize();
bfin_jtag_initialize();
uartlite_serial_initialize();
zynq_serial_initalize();
serial_assign(default_serial_console()->name);

2
include/configs/bfin_adi_common.h
View File

@ -108,11 +108,11 @@
#define CONFIG_LOADS_ECHO 1
#define CONFIG_JTAG_CONSOLE
#define CONFIG_SILENT_CONSOLE
#define CONFIG_SERIAL_MULTI
#ifndef CONFIG_BAUDRATE
# define CONFIG_BAUDRATE 57600
#endif
#ifndef CONFIG_DEBUG_EARLY_SERIAL
# define CONFIG_SERIAL_MULTI
# define CONFIG_SYS_BFIN_UART
#endif