ADD: [nrhw20] configurable u-boot console

BugzID: 42044

arch/arm/include/asm/arch-am33xx/spl.h

@@ -47,6 +47,7 @@
 #define BOOT_DEVICE_UART	0x41
 #define BOOT_DEVICE_USBETH	0x44
 #define BOOT_DEVICE_CPGMAC	0x46
+#define BOOT_DEVICE_JTAG        0x58
 
 #define MMC_BOOT_DEVICES_START	BOOT_DEVICE_MMC1
 #define MMC_BOOT_DEVICES_END	BOOT_DEVICE_MMC2

board/nm/nrhw20/board.c

@@ -254,18 +254,23 @@ static inline int __maybe_unused read_eeprom(void)
 }
 
 /* Selects console for SPL.
- * U-Boot console is defined by CONFIG_CONS_INDEX (via menuconfig)
+ * U-Boot console is defined by CONSOLE_INDEX variable 
+ * defined using serial_set_console_index(int index)
  */
 struct serial_device *default_serial_console(void)
 {
-	if (spl_boot_device() == BOOT_DEVICE_UART) {
+	/* Mux Pins for selected UART properly. 
+	   Note: uart indexes start at 0 while 
+	   eserial indexes start at 1. */
+	if ((spl_boot_device() == BOOT_DEVICE_UART) || 
+		(spl_boot_device() == BOOT_DEVICE_JTAG)) {
 		enable_uart0_pin_mux();
 		return &eserial1_device;
+	} else {
+		/* Use bluetooth uart, if no ouput shall be seen. */
+		enable_uart5_pin_mux();
+		return &eserial6_device;
 	}
-	else {
-		enable_uart1_pin_mux();
-		return &eserial2_device;
-    }
 }
 
 #ifndef CONFIG_SKIP_LOWLEVEL_INIT
@@ -541,6 +546,9 @@ int board_init(void)
 
 #if !defined(CONFIG_SPL_BUILD)
 
+extern int console_init_f(void);
+extern void serial_set_console_index(int index);
+
 /*
  * Set Linux console based on
  * - Selection in /root/boot/consoledev
@@ -574,6 +582,26 @@ void set_console(void)
 			setenv("defaultconsole", buf);
 		}
 	}
+	
+#if defined(CONFIG_PRE_CONSOLE_BUFFER)
+	defaultconsole = getenv("defaultconsole");
+
+	if (strstr(defaultconsole, "ttyS0")) {
+		/* Only use internal console, if explicitely specified */
+		serial_set_console_index(0);
+//	} else if (strstr(defaultconsole, "ttyNull")) {
+//		/* If no console shall be available use bluetooth uart. */
+//		serial_set_console_index(5);
+	} else {
+		/* Otherwise and especially, if no console is specified 
+		use the default console, which is the external console */
+		serial_set_console_index(1);
+	}
+	serial_init(); /* serial communications setup */
+	console_init_f(); /* stage 1 init of console */
+#else
+    serial_set_console_index(1);
+#endif
 }
 
 static void set_devicetree_name(void)

board/nm/nrhw20/board.h

@@ -19,6 +19,8 @@
 void enable_uart0_pin_mux(void);
 void disable_uart0_pin_mux(void);
 void enable_uart1_pin_mux(void);
+void enable_uart3_pin_mux(void);
+void enable_uart5_pin_mux(void);
 /*
 void enable_uart2_pin_mux(void);
 void enable_uart3_pin_mux(void);

board/nm/nrhw20/mux.c

@@ -249,3 +249,12 @@ void enable_uart1_pin_mux(void)
 	configure_module_pin_mux(uart1_pin_mux);
 }
 
+void enable_uart3_pin_mux(void)
+{
+	configure_module_pin_mux(uart3_pin_mux);
+}
+
+void enable_uart5_pin_mux(void)
+{
+	configure_module_pin_mux(uart5_pin_mux);
+}

common/board_f.c

@@ -888,8 +888,10 @@ static init_fnc_t init_sequence_f[] = {
 	init_timebase,
 #endif
 	init_baud_rate,		/* initialze baudrate settings */
+#if !defined(CONFIG_PRE_CONSOLE_BUFFER)
 	serial_init,		/* serial communications setup */
 	console_init_f,		/* stage 1 init of console */
+#endif
 #ifdef CONFIG_SANDBOX
 	sandbox_early_getopt_check,
 #endif

common/console.c

@@ -414,7 +414,7 @@ int tstc(void)
 #define PRE_CONSOLE_FLUSHPOINT2_EVERYTHING_BUT_SERIAL	1
 
 #ifdef CONFIG_PRE_CONSOLE_BUFFER
-#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)CONFIG_PRE_CON_BUF_SZ)
+#define CIRC_BUF_IDX(idx) ((idx) % (unsigned long)(CONFIG_PRE_CON_BUF_SZ))
 
 static void pre_console_putc(const char c)
 {

drivers/serial/serial-uclass.c

@@ -27,6 +27,17 @@ static const unsigned long baudrate_table[] = CONFIG_SYS_BAUDRATE_TABLE;
 #error "Serial is required before relocation - define CONFIG_SYS_MALLOC_F_LEN to make this work"
 #endif
 
+#ifdef CONFIG_CONS_INDEX
+static int CONSOLE_INDEX = CONFIG_CONS_INDEX - 1;
+#else
+static int CONSOLE_INDEX = 0;
+#endif
+
+void serial_set_console_index(int index)
+{
+	CONSOLE_INDEX = index;
+}
+
 static void serial_find_console_or_panic(void)
 {
 	const void *blob = gd->fdt_blob;
@@ -84,18 +95,12 @@ static void serial_find_console_or_panic(void)
 		 * extremis just the first serial device we can find. But we
 		 * insist on having a console (even if it is silent).
 		 */
-#ifdef CONFIG_CONS_INDEX
-#define INDEX (CONFIG_CONS_INDEX - 1)
-#else
-#define INDEX 0
-#endif
-		if (!uclass_get_device_by_seq(UCLASS_SERIAL, INDEX, &dev) ||
-		    !uclass_get_device(UCLASS_SERIAL, INDEX, &dev) ||
+		if (!uclass_get_device_by_seq(UCLASS_SERIAL, CONSOLE_INDEX, &dev) ||
+		    !uclass_get_device(UCLASS_SERIAL, CONSOLE_INDEX, &dev) ||
 		    (!uclass_first_device(UCLASS_SERIAL, &dev) && dev)) {
 			gd->cur_serial_dev = dev;
 			return;
 		}
-#undef INDEX
 	}
 
 #ifdef CONFIG_REQUIRE_SERIAL_CONSOLE
@@ -115,7 +120,9 @@ int serial_init(void)
 /* Called after relocation */
 void serial_initialize(void)
 {
+#if !defined(CONFIG_PRE_CONSOLE_BUFFER)
 	serial_init();
+#endif
 }
 
 static void _serial_putc(struct udevice *dev, char ch)

fs/fs.c

@@ -307,8 +307,6 @@ int fs_read(const char *filename, ulong addr, loff_t offset, loff_t len,
 	unmap_sysmem(buf);
 
 	/* If we requested a specific number of bytes, check we got it */
-	if (ret == 0 && len && *actread != len)
-		printf("** %s shorter than offset + len **\n", filename);
 	fs_close();
 
 	return ret;

include/configs/am335x_nrhw20.h

@@ -36,6 +36,10 @@
 #define CONFIG_MACH_TYPE		MACH_TYPE_TIAM335EVM
 #define CONFIG_BOARD_LATE_INIT
 
+#define CONFIG_PRE_CONSOLE_BUFFER 1
+#define CONFIG_PRE_CON_BUF_ADDR   0x80000000
+#define CONFIG_PRE_CON_BUF_SZ     64*1024
+
 /* Clock Defines */
 #define V_OSCK				0 /* 0 means detect from sysboot1 config */
 #define V_SCLK				(V_OSCK)
@@ -105,6 +109,10 @@
 /* UART Configuration */
 #define CONFIG_SYS_NS16550_COM1			0x44e09000	/* UART0: XModem Boot, Shield */
 #define CONFIG_SYS_NS16550_COM2			0x48022000	/* UART1: eMMC Boot, User UART */
+#define CONFIG_SYS_NS16550_COM3			0x48024000	/* Unused */
+#define CONFIG_SYS_NS16550_COM4			0x481A6000	/* GNSS */
+#define CONFIG_SYS_NS16550_COM5			0x481A8000	/* Unused */
+#define CONFIG_SYS_NS16550_COM6			0x481AA000	/* Bluetooth */
 
 #define CONFIG_I2C
 #define CONFIG_I2C_MULTI_BUS