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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
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@ -112,6 +112,13 @@ config DEBUG_UART_S5P
will need to provide parameters to make this work. The driver will will need to provide parameters to make this work. The driver will
be available until the real driver-model serial is running. 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 config DEBUG_UART_ZYNQ
bool "Xilinx Zynq" bool "Xilinx Zynq"
help help

26
drivers/serial/serial_xuartlite.c
View file

@ -114,3 +114,29 @@ U_BOOT_DRIVER(serial_uartlite) = {
.ops = &uartlite_serial_ops, .ops = &uartlite_serial_ops,
.flags = DM_FLAG_PRE_RELOC, .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