sparc: leon3: Add debug_uart support to LEON3 serial driver.
Signed-off-by: Francois Retief <fgretief@spaceteq.co.za>
diff --git a/arch/sparc/cpu/leon3/cpu_init.c b/arch/sparc/cpu/leon3/cpu_init.c
index 40d1751..b140da3 100644
--- a/arch/sparc/cpu/leon3/cpu_init.c
+++ b/arch/sparc/cpu/leon3/cpu_init.c
@@ -13,6 +13,7 @@
#include <ambapp.h>
#include <grlib/irqmp.h>
#include <grlib/gptimer.h>
+#include <debug_uart.h>
#include <config.h>
@@ -50,7 +51,9 @@
*/
void cpu_init_f(void)
{
-
+#ifdef CONFIG_DEBUG_UART
+ debug_uart_init();
+#endif
}
/* Routine called from start.S,
diff --git a/arch/sparc/cpu/leon3/serial.c b/arch/sparc/cpu/leon3/serial.c
index cefb9d2..66b3773 100644
--- a/arch/sparc/cpu/leon3/serial.c
+++ b/arch/sparc/cpu/leon3/serial.c
@@ -28,8 +28,10 @@
/* find UART */
if (ambapp_apb_find(&ambapp_plb, VENDOR_GAISLER, GAISLER_APBUART,
- CONFIG_SYS_GRLIB_APBUART_INDEX, &apbdev) != 1)
+ CONFIG_SYS_GRLIB_APBUART_INDEX, &apbdev) != 1) {
+ panic("%s: apbuart not found!\n", __func__);
return -1; /* didn't find hardware */
+ }
/* found apbuart, let's init .. */
uart = (ambapp_dev_apbuart *) apbdev.address;
@@ -145,3 +147,26 @@
{
return &leon3_serial_drv;
}
+
+#ifdef CONFIG_DEBUG_UART_APBUART
+
+#include <debug_uart.h>
+
+static inline void _debug_uart_init(void)
+{
+ ambapp_dev_apbuart *uart = (ambapp_dev_apbuart *)CONFIG_DEBUG_UART_BASE;
+ uart->scaler = (((CONFIG_DEBUG_UART_CLOCK*10) / (CONFIG_BAUDRATE*8)) - 5)/10;
+ uart->ctrl = APBUART_CTRL_RE | APBUART_CTRL_TE;
+}
+
+static inline void _debug_uart_putc(int ch)
+{
+ ambapp_dev_apbuart *uart = (ambapp_dev_apbuart *)CONFIG_DEBUG_UART_BASE;
+ while (!(readl(&uart->status) & APBUART_STATUS_THE))
+ WATCHDOG_RESET();
+ writel(ch, &uart->data);
+}
+
+DEBUG_UART_FUNCS
+
+#endif
diff --git a/configs/grsim_defconfig b/configs/grsim_defconfig
index a5ea7ab..d2f709f 100644
--- a/configs/grsim_defconfig
+++ b/configs/grsim_defconfig
@@ -14,3 +14,7 @@
# CONFIG_CMD_NET is not set
# CONFIG_CMD_NFS is not set
CONFIG_SYS_AMBAPP_PRINT_ON_STARTUP=y
+CONFIG_DEBUG_UART=y
+CONFIG_DEBUG_UART_APBUART=y
+CONFIG_DEBUG_UART_BASE=0x80000100
+CONFIG_DEBUG_UART_CLOCK=40000000
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index d462244..eba96f4 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -98,6 +98,14 @@
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_APBUART
+ depends on LEON3
+ bool "Gaisler APBUART"
+ help
+ Select this to enable a debug UART using the serial_leon3 driver. You
+ will need to provide parameters to make this work. The driver will
+ be available until the real driver model serial is running.
+
endchoice
config DEBUG_UART_BASE