[rtems commit] bsps/microblaze: Add device tree support to UART Lite

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    9d5354e89785c38ec66fc8829bcd4fffac94e856
Changeset: http://git.rtems.org/rtems/commit/?id=9d5354e89785c38ec66fc8829bcd4fffac94e856

Author:    Ryan Long <ryan.long at oarcorp.com>
Date:      Wed Oct 19 13:46:14 2022 -0500

bsps/microblaze: Add device tree support to UART Lite

---

 .../microblaze_fpga/console/console-io.c           | 19 ++++++++++++--
 bsps/microblaze/microblaze_fpga/console/debug-io.c | 29 ++++++++++++++++++----
 bsps/microblaze/shared/dev/serial/uartlite.c       |  9 ++++++-
 3 files changed, 49 insertions(+), 8 deletions(-)

diff --git a/bsps/microblaze/microblaze_fpga/console/console-io.c b/bsps/microblaze/microblaze_fpga/console/console-io.c
index cb2e367035..81c4e73690 100644
--- a/bsps/microblaze/microblaze_fpga/console/console-io.c
+++ b/bsps/microblaze/microblaze_fpga/console/console-io.c
@@ -35,20 +35,35 @@
  */
 
 #include <bsp/console-termios.h>
+#include <bsp/microblaze-fdt-support.h>
 #include <dev/serial/uartlite.h>
 
 #include <bspopts.h>
 
 uart_lite_context microblaze_qemu_uart_context = {
   .base = RTEMS_TERMIOS_DEVICE_CONTEXT_INITIALIZER( "UARTLITE" ),
-  .address = BSP_MICROBLAZE_FPGA_UART_BASE,
   .initial_baud = 115200
 };
 
+static bool fill_uart_base(rtems_termios_device_context *context)
+{
+  uint32_t mblaze_uart_base;
+
+  mblaze_uart_base = try_get_prop_from_device_tree(
+    "xlnx,xps-uartlite-1.00.a",
+    "reg",
+    BSP_MICROBLAZE_FPGA_UART_BASE
+  );
+
+  microblaze_qemu_uart_context.address = mblaze_uart_base;
+
+  return true;
+}
+
 const console_device console_device_table[] = {
   {
     .device_file = "/dev/ttyS0",
-    .probe = console_device_probe_default,
+    .probe = fill_uart_base,
     .handler = &microblaze_uart_fns,
     .context = &microblaze_qemu_uart_context.base
   }
diff --git a/bsps/microblaze/microblaze_fpga/console/debug-io.c b/bsps/microblaze/microblaze_fpga/console/debug-io.c
index e88f5468a7..d85229ae9e 100644
--- a/bsps/microblaze/microblaze_fpga/console/debug-io.c
+++ b/bsps/microblaze/microblaze_fpga/console/debug-io.c
@@ -37,23 +37,42 @@
 #include <dev/serial/uartlite_l.h>
 #include <rtems/bspIo.h>
 
+#include <bsp.h>
 #include <bspopts.h>
 
+static uint32_t mblaze_uart_base = 0;
+
 static void output_char( char c )
 {
-  if ( c == '\n' ) {
-    XUartLite_SendByte( BSP_MICROBLAZE_FPGA_UART_BASE, '\r' );
+  if (mblaze_uart_base == 0 ) {
+    mblaze_uart_base = try_get_prop_from_device_tree(
+      "xlnx,xps-uartlite-1.00.a",
+      "reg",
+      BSP_MICROBLAZE_FPGA_UART_BASE
+    );
+  }
+
+    if ( c == '\n' ) {
+    XUartLite_SendByte( mblaze_uart_base, '\r' );
   }
-  XUartLite_SendByte( BSP_MICROBLAZE_FPGA_UART_BASE, c );
+  XUartLite_SendByte( mblaze_uart_base, c );
 }
 
 static int xUartLite_RecvByte( int minor )
 {
-  if ( XUartLite_IsReceiveEmpty( BSP_MICROBLAZE_FPGA_UART_BASE ) ) {
+  if (mblaze_uart_base == 0 ) {
+    mblaze_uart_base = try_get_prop_from_device_tree(
+      "xlnx,xps-uartlite-1.00.a",
+      "reg",
+      BSP_MICROBLAZE_FPGA_UART_BASE
+    );
+  }
+
+  if ( XUartLite_IsReceiveEmpty( mblaze_uart_base ) ) {
     return -1;
   }
 
-  return XUartLite_ReadReg( BSP_MICROBLAZE_FPGA_UART_BASE, XUL_RX_FIFO_OFFSET );
+  return XUartLite_ReadReg( mblaze_uart_base, XUL_RX_FIFO_OFFSET );
 }
 
 static int get_char( void )
diff --git a/bsps/microblaze/shared/dev/serial/uartlite.c b/bsps/microblaze/shared/dev/serial/uartlite.c
index a5fc4fe82b..953c630759 100644
--- a/bsps/microblaze/shared/dev/serial/uartlite.c
+++ b/bsps/microblaze/shared/dev/serial/uartlite.c
@@ -70,8 +70,15 @@ static bool uart_first_open(
 
 #ifdef BSP_MICROBLAZE_FPGA_CONSOLE_INTERRUPTS
   XUartLite_EnableIntr( ctx->address );
+
+  uint32_t uart_irq_num = try_get_prop_from_device_tree(
+    "xlnx,xps-uartlite-1.00.a",
+    "interrupts",
+    1
+  );
+
   sc = rtems_interrupt_handler_install(
-    1,
+    uart_irq_num,
     "UART",
     RTEMS_INTERRUPT_SHARED,
     microblaze_uart_interrupt,