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| author | Michal Simek <michal.simek@xilinx.com> | 2015-12-14 16:55:10 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2016-01-27 15:55:49 +0100 |
| commit | 4166ba3b2351aa72c372f66a54e9fb92cffbd230 (patch) | |
| tree | b02e85c0f7634744bad03a9a30b0acf52c1a3b2a /drivers/serial | |
| parent | 93768393d71871e4638d613acfdad6ef3cf62561 (diff) | |
| download | blackbird-obmc-uboot-4166ba3b2351aa72c372f66a54e9fb92cffbd230.tar.gz blackbird-obmc-uboot-4166ba3b2351aa72c372f66a54e9fb92cffbd230.zip | |
serial: uartlite: Add support for debug console
Add support for debug console.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Thomas Chou <thomas@wytron.com.tw>
Diffstat (limited to 'drivers/serial')
| -rw-r--r-- | drivers/serial/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/serial/serial_xuartlite.c | 26 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig index 83068cfd50..e78c5d3479 100644 --- a/drivers/serial/Kconfig +++ b/drivers/serial/Kconfig @@ -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 diff --git a/drivers/serial/serial_xuartlite.c b/drivers/serial/serial_xuartlite.c index 157e14dedc..a2e9303925 100644 --- a/drivers/serial/serial_xuartlite.c +++ b/drivers/serial/serial_xuartlite.c @@ -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(®s->control, 0); + out_be32(®s->control, ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX); + in_be32(®s->control); +} + +static inline void _debug_uart_putc(int ch) +{ + struct uartlite *regs = (struct uartlite *)CONFIG_DEBUG_UART_BASE; + + while (in_be32(®s->status) & SR_TX_FIFO_FULL) + ; + + out_be32(®s->tx_fifo, ch & 0xff); +} + +DEBUG_UART_FUNCS +#endif |
