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serial: uartlite: Add support for debug console

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Add support for debug console.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Thomas Chou <thomas@wytron.com.tw>
This commit is contained in:
Michal Simek 2015-12-14 16:55:10 +01:00
parent 93768393d7
commit 4166ba3b23
2 changed files with 33 additions and 0 deletions
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7
drivers/serial/Kconfig
View File

@ -112,6 +112,13 @@ config DEBUG_UART_S5P
will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_UARTLITE
bool "Xilinx Uartlite"
help
Select this to enable a debug UART using the serial_uartlite driver.
You will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running.
config DEBUG_UART_ZYNQ
bool "Xilinx Zynq"
help

26
drivers/serial/serial_xuartlite.c
View File

@ -114,3 +114,29 @@ U_BOOT_DRIVER(serial_uartlite) = {
.ops = &uartlite_serial_ops,
.flags = DM_FLAG_PRE_RELOC,
};
#ifdef CONFIG_DEBUG_UART_UARTLITE
#include <debug_uart.h>
static inline void _debug_uart_init(void)
{
struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE;
out_be32(&regs->control, 0);
out_be32(&regs->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);
in_be32(&regs->control);
}
static inline void _debug_uart_putc(int ch)
{
struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE;
while (in_be32(&regs->status) & SR_TX_FIFO_FULL)
;
out_be32(&regs->tx_fifo, ch & 0xff);
}
DEBUG_UART_FUNCS
#endif