introduce console none support

this will allow to have no console support

Use full for bootstrap as we can save 6.5 KiB (barebox.bin) and
3.8 KiB (zbarebox.bin lzo) on at91sam9263 as example vs console simple

As on bootstrap we have often very limited size.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands/Kconfig

@@ -260,6 +260,7 @@ endmenu
 menu "memory"
 
 config CMD_LOADB
+	depends on !CONSOLE_NONE
 	select CRC16
 	tristate
 	prompt "loadb"
@@ -267,10 +268,12 @@ config CMD_LOADB
 config CMD_LOADY
 	select CRC16
 	select XYMODEM
+	depends on !CONSOLE_NONE
 	tristate
 	prompt "loady"
 
 config CMD_LOADS
+	depends on !CONSOLE_NONE
 	tristate
 	prompt "loads"
 

common/Kconfig

@@ -484,6 +484,10 @@ config CONSOLE_SIMPLE
 	bool
 	prompt "simple"
 
+config CONSOLE_NONE
+	bool
+	prompt "none"
+
 endchoice
 
 choice

common/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_MEMINFO) += meminfo.o
 obj-$(CONFIG_COMMAND_SUPPORT) += command.o
 obj-$(CONFIG_CONSOLE_FULL) += console.o
 obj-$(CONFIG_CONSOLE_SIMPLE) += console_simple.o
+obj-$(CONFIG_CONSOLE_NONE) += console_none.o
 obj-$(CONFIG_DIGEST) += digest.o
 obj-$(CONFIG_ENVIRONMENT_VARIABLES) += env.o
 obj-$(CONFIG_UIMAGE) += image.o

common/console_none.c

@@ -0,0 +1,42 @@
+#include <config.h>
+#include <common.h>
+#include <fs.h>
+#include <errno.h>
+#include <debug_ll.h>
+
+int fputc(int fd, char c)
+{
+	if (fd != 1 && fd != 2)
+		return write(fd, &c, 1);
+	return 0;
+}
+EXPORT_SYMBOL(fputc);
+
+int fputs(int fd, const char *s)
+{
+	if (fd != 1 && fd != 2)
+		return write(fd, s, strlen(s));
+	return 0;
+}
+EXPORT_SYMBOL(fputs);
+
+int fprintf(int file, const char *fmt, ...)
+{
+	va_list args;
+	uint i;
+	char printbuffer[CFG_PBSIZE];
+
+	va_start (args, fmt);
+
+	/* For this to work, printbuffer must be larger than
+	 * anything we ever want to print.
+	 */
+	i = vsprintf (printbuffer, fmt, args);
+	va_end (args);
+
+	/* Print the string */
+	fputs(file, printbuffer);
+
+	return i;
+}
+EXPORT_SYMBOL(fprintf);

drivers/serial/Kconfig

@@ -1,4 +1,5 @@
 menu "serial drivers"
+	depends on !CONSOLE_NONE
 
 config DRIVER_SERIAL_ARM_DCC
 	depends on ARM

drivers/usb/gadget/Kconfig

@@ -44,7 +44,7 @@ config USB_GADGET_DFU
 
 config USB_GADGET_SERIAL
 	bool
-	depends on EXPERIMENTAL
+	depends on EXPERIMENTAL && !CONSOLE_NONE
 	prompt "Serial Gadget"
 
 endif

include/stdio.h

@@ -11,6 +11,15 @@
 /* serial stuff */
 void	serial_printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
 
+int	sprintf(char *buf, const char *fmt, ...) __attribute__ ((format(__printf__, 2, 3)));
+int	snprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
+int	vsprintf(char *buf, const char *fmt, va_list args);
+char	*asprintf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
+char	*vasprintf(const char *fmt, va_list ap);
+int	vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
+int	vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
+
+#ifndef CONFIG_CONSOLE_NONE
 /* stdin */
 int	tstc(void);
 
@@ -20,6 +29,51 @@ int	getc(void);
 int	console_puts(unsigned int ch, const char *s);
 void	console_flush(void);
 
+
+int	printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
+int	vprintf(const char *fmt, va_list args);
+#else
+static inline int tstc(void)
+{
+	return 0;
+}
+
+static inline int console_puts(unsigned int ch, const char *str)
+{
+	return 0;
+}
+
+static inline int getc(void)
+{
+	return -EINVAL;
+}
+
+static inline void console_putc(unsigned int ch, char c) {}
+
+static inline void console_flush(void) {}
+
+static int printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
+static inline int printf(const char *fmt, ...)
+{
+	return 0;
+}
+
+
+static inline int vprintf(const char *fmt, va_list args)
+{
+	return 0;
+}
+
+#ifndef ARCH_HAS_CTRLC
+/* test if ctrl-c was pressed */
+static inline int ctrlc (void)
+{
+	return 0;
+}
+#endif /* ARCH_HAS_CTRC */
+
+#endif
+
 static inline int puts(const char *s)
 {
 	return console_puts(CONSOLE_STDOUT, s);
@@ -30,16 +84,6 @@ static inline void putchar(char c)
 	console_putc(CONSOLE_STDOUT, c);
 }
 
-int	printf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
-int	vprintf(const char *fmt, va_list args);
-int	sprintf(char *buf, const char *fmt, ...) __attribute__ ((format(__printf__, 2, 3)));
-int	snprintf(char *buf, size_t size, const char *fmt, ...) __attribute__ ((format(__printf__, 3, 4)));
-int	vsprintf(char *buf, const char *fmt, va_list args);
-char	*asprintf(const char *fmt, ...) __attribute__ ((format(__printf__, 1, 2)));
-char	*vasprintf(const char *fmt, va_list ap);
-int	vsnprintf(char *buf, size_t size, const char *fmt, va_list args);
-int	vscnprintf(char *buf, size_t size, const char *fmt, va_list args);
-
 /* stderr */
 #define eputc(c)		console_putc(CONSOLE_STDERR, c)
 #define eputs(s)		console_puts(CONSOLE_STDERR, s)

net/Kconfig

@@ -17,6 +17,7 @@ config NET_PING
 
 config NET_NETCONSOLE
 	bool
+	depends on !CONSOLE_NONE
 	prompt "network console support"
 	help
 	  This option adds support for a simple udp based network console.