armv8: layerscape: enable eMMC HS400 workarounds for LX2160A/LX2162A

[J-u-boot.git] / include / debug_uart.h

diff --git a/include/debug_uart.h b/include/debug_uart.h
index f56797b72f4f98f5f87f549fd198b2c7863ddc96..714b369e6fed75eba5424374f4679a7becf7af0a 100644 (file)
--- a/include/debug_uart.h
+++ b/include/debug_uart.h
@@ -1,17 +1,14 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
 /*
  * Early debug UART support
  *
  * (C) Copyright 2014 Google, Inc
  * Writte by Simon Glass <[email protected]>
- *
- * SPDX-License-Identifier:    GPL-2.0+
  */
 
 #ifndef _DEBUG_UART_H
 #define _DEBUG_UART_H
 
-#include <linux/linkage.h>
-
 /*
  * The debug UART is intended for use very early in U-Boot to debug problems
  * when an ICE or other debug mechanism is not available.
@@ -40,10 +37,15 @@
  * To enable the debug UART in your serial driver:
  *
  * - #include <debug_uart.h>
- * - Define debug_uart_init(), trying to avoid using the stack
+ * - Define _debug_uart_init(), trying to avoid using the stack
  * - Define _debug_uart_putc() as static inline (avoiding stack usage)
  * - Immediately afterwards, add DEBUG_UART_FUNCS to define the rest of the
  *     functionality (printch(), etc.)
+ *
+ * If your board needs additional init for the UART to work, enable
+ * CONFIG_DEBUG_UART_BOARD_INIT and write a function called
+ * board_debug_uart_init() to perform that init. When debug_uart_init() is
+ * called, the init will happen automatically.
  */
 
 /**
@@ -59,81 +61,140 @@
  */
 void debug_uart_init(void);
 
+#ifdef CONFIG_DEBUG_UART_BOARD_INIT
+void board_debug_uart_init(void);
+#else
+static inline void board_debug_uart_init(void)
+{
+}
+#endif
+
 /**
  * printch() - Output a character to the debug UART
  *
  * @ch:                Character to output
  */
-asmlinkage void printch(int ch);
+void printch(int ch);
 
 /**
  * printascii() - Output an ASCII string to the debug UART
  *
  * @str:       String to output
  */
-asmlinkage void printascii(const char *str);
+void printascii(const char *str);
 
 /**
  * printhex2() - Output a 2-digit hex value
  *
  * @value:     Value to output
  */
-asmlinkage void printhex2(uint value);
+void printhex2(unsigned int value);
 
 /**
  * printhex4() - Output a 4-digit hex value
  *
  * @value:     Value to output
  */
-asmlinkage void printhex4(uint value);
+void printhex4(unsigned int value);
 
 /**
  * printhex8() - Output a 8-digit hex value
  *
  * @value:     Value to output
  */
-asmlinkage void printhex8(uint value);
+void printhex8(unsigned int value);
+
+/**
+ * printdec() - Output a decimalism value
+ *
+ * @value:     Value to output
+ */
+void printdec(unsigned int value);
+
+#ifdef CONFIG_DEBUG_UART_ANNOUNCE
+#define _DEBUG_UART_ANNOUNCE   printascii("\n<debug_uart>\n");
+#else
+#define _DEBUG_UART_ANNOUNCE
+#endif
+
+#define serial_dout(reg, value)        \
+       serial_out_shift((char *)com_port + \
+               ((char *)reg - (char *)com_port) * \
+                       (1 << CONFIG_DEBUG_UART_SHIFT), \
+               CONFIG_DEBUG_UART_SHIFT, value)
+#define serial_din(reg) \
+       serial_in_shift((char *)com_port + \
+               ((char *)reg - (char *)com_port) * \
+                       (1 << CONFIG_DEBUG_UART_SHIFT), \
+               CONFIG_DEBUG_UART_SHIFT)
 
 /*
  * Now define some functions - this should be inserted into the serial driver
  */
 #define DEBUG_UART_FUNCS \
-       asmlinkage void printch(int ch) \
+\
+       static inline void _printch(int ch) \
        { \
+               if (ch == '\n') \
+                       _debug_uart_putc('\r'); \
                _debug_uart_putc(ch); \
        } \
 \
-       asmlinkage void printascii(const char *str) \
+       void printch(int ch) \
+       { \
+               _printch(ch); \
+       } \
+\
+       void printascii(const char *str) \
        { \
                while (*str) \
-                       _debug_uart_putc(*str++); \
+                       _printch(*str++); \
        } \
 \
-       static inline void printhex1(uint digit) \
+       static inline void printhex1(unsigned int digit) \
        { \
                digit &= 0xf; \
                _debug_uart_putc(digit > 9 ? digit - 10 + 'a' : digit + '0'); \
        } \
 \
-       static inline void printhex(uint value, int digits) \
+       static inline void printhex(unsigned int value, int digits) \
        { \
                while (digits-- > 0) \
                        printhex1(value >> (4 * digits)); \
        } \
 \
-       asmlinkage void printhex2(uint value) \
+       void printhex2(unsigned int value) \
        { \
                printhex(value, 2); \
        } \
 \
-       asmlinkage void printhex4(uint value) \
+       void printhex4(unsigned int value) \
        { \
                printhex(value, 4); \
        } \
 \
-       asmlinkage void printhex8(uint value) \
+       void printhex8(unsigned int value) \
        { \
                printhex(value, 8); \
-       }
+       } \
+\
+       void printdec(unsigned int value) \
+       { \
+               if (value > 10) { \
+                       printdec(value / 10); \
+                       value %= 10; \
+               } else if (value == 10) { \
+                       _debug_uart_putc('1'); \
+                       value = 0; \
+               } \
+               _debug_uart_putc('0' + value); \
+       } \
+\
+       void debug_uart_init(void) \
+       { \
+               board_debug_uart_init(); \
+               _debug_uart_init(); \
+               _DEBUG_UART_ANNOUNCE \
+       } \
 
 #endif