stdio: Pass device pointer to stdio methods

At present stdio device functions do not get any clue as to which stdio
device is being acted on. Some implementations go to great lengths to work
around this, such as defining a whole separate set of functions for each
possible device.

For driver model we need to associate a stdio_dev with a device. It doesn't
seem possible to continue with this work-around approach.

Instead, add a stdio_dev pointer to each of the stdio member functions.

Note: The serial drivers have the same problem, but it is not strictly
necessary to fix that to get driver model running. Also, if we convert
serial over to driver model the problem will go away.

Code size increases by 244 bytes for Thumb2 and 428 for PowerPC.

22: stdio: Pass device pointer to stdio methods
       arm: (for 2/2 boards)  all +244.0  bss -4.0  text +248.0
   powerpc: (for 1/1 boards)  all +428.0  text +428.0

Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Marek Vasut <marex@denx.de>

1 files changed, 6 insertions, 5 deletions

diff --git a/common/cmd_log.c b/common/cmd_log.c
index 38d0f5edfd..873ee40371 100644
--- a/common/cmd_log.c
+++ b/common/cmd_log.c
@@ -33,8 +33,8 @@
 DECLARE_GLOBAL_DATA_PTR;
 
 /* Local prototypes */
-static void logbuff_putc(const char c);
-static void logbuff_puts(const char *s);
+static void logbuff_putc(struct stdio_dev *dev, const char c);
+static void logbuff_puts(struct stdio_dev *dev, const char *s);
 static int logbuff_printk(const char *line);
 
 static char buf[1024];
@@ -143,7 +143,7 @@ int drv_logbuff_init(void)
 	return (rc == 0) ? 1 : rc;
 }
 
-static void logbuff_putc(const char c)
+static void logbuff_putc(struct stdio_dev *dev, const char c)
 {
 	char buf[2];
 	buf[0] = c;
@@ -151,7 +151,7 @@ static void logbuff_putc(const char c)
 	logbuff_printk(buf);
 }
 
-static void logbuff_puts(const char *s)
+static void logbuff_puts(struct stdio_dev *dev, const char *s)
 {
 	logbuff_printk (s);
 }
@@ -181,6 +181,7 @@ void logbuff_log(char *msg)
  */
 int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
+	struct stdio_dev *sdev = NULL;
 	char *s;
 	unsigned long i, start, size;
 
@@ -188,7 +189,7 @@ int do_log(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		/* Log concatenation of all arguments separated by spaces */
 		for (i = 2; i < argc; i++) {
 			logbuff_printk(argv[i]);
-			logbuff_putc((i < argc - 1) ? ' ' : '\n');
+			logbuff_putc(sdev, (i < argc - 1) ? ' ' : '\n');
 		}
 		return 0;
 	}