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>

drivers/input/cros_ec_keyb.c

@@ -93,7 +93,7 @@ static int check_for_keys(struct keyb *config,
  *
  * @return 0 if no keys available, 1 if keys are available
  */
-static int kbd_tstc(void)
+static int kbd_tstc(struct stdio_dev *dev)
 {
 	/* Just get input to do this for us */
 	return config.inited ? input_tstc(&config.input) : 0;
@@ -104,7 +104,7 @@ static int kbd_tstc(void)
  *
  * @return ASCII key code, or 0 if no key, or -1 if error
  */
-static int kbd_getc(void)
+static int kbd_getc(struct stdio_dev *dev)
 {
 	/* Just get input to do this for us */
 	return config.inited ? input_getc(&config.input) : 0;
@@ -214,7 +214,7 @@ static int cros_ec_keyb_decode_fdt(const void *blob, int node,
  *
  * @return 0 if ok, -1 on error
  */
-static int cros_ec_init_keyboard(void)
+static int cros_ec_init_keyboard(struct stdio_dev *dev)
 {
 	const void *blob = gd->fdt_blob;
 	int node;

drivers/input/i8042.c

@@ -398,7 +398,7 @@ int i8042_kbd_init(void)
  * i8042_tstc - test if keyboard input is available
  *		option: cursor blinking if called in a loop
  */
-int i8042_tstc(void)
+int i8042_tstc(struct stdio_dev *dev)
 {
 	unsigned char scan_code = 0;
 
@@ -432,7 +432,7 @@ int i8042_tstc(void)
  * i8042_getc - wait till keyboard input is available
  *		option: turn on/off cursor while waiting
  */
-int i8042_getc(void)
+int i8042_getc(struct stdio_dev *dev)
 {
 	int ret_chr;
 	unsigned char scan_code;

drivers/input/keyboard.c

@@ -70,7 +70,7 @@ static void kbd_put_queue(char data)
 }
 
 /* test if a character is in the queue */
-static int kbd_testc(void)
+static int kbd_testc(struct stdio_dev *dev)
 {
 #if defined(CONFIG_MPC5xxx) || defined(CONFIG_MPC8540) || defined(CONFIG_MPC8541) || defined(CONFIG_MPC8555)
 	/* no ISR is used, so received chars must be polled */
@@ -83,7 +83,7 @@ static int kbd_testc(void)
 }
 
 /* gets the character from the queue */
-static int kbd_getc(void)
+static int kbd_getc(struct stdio_dev *dev)
 {
 	char c;
 	while(in_pointer==out_pointer) {

drivers/input/tegra-kbc.c

@@ -194,7 +194,7 @@ int tegra_kbc_check(struct input_config *input)
  *
  * @return 0 if no keys available, 1 if keys are available
  */
-static int kbd_tstc(void)
+static int kbd_tstc(struct stdio_dev *dev)
 {
 	/* Just get input to do this for us */
 	return input_tstc(&config.input);
@@ -207,7 +207,7 @@ static int kbd_tstc(void)
  *
  * @return ASCII key code, or 0 if no key, or -1 if error
  */
-static int kbd_getc(void)
+static int kbd_getc(struct stdio_dev *dev)
 {
 	/* Just get input to do this for us */
 	return input_getc(&config.input);
@@ -289,7 +289,7 @@ static void tegra_kbc_open(void)
  *
  * @return 0 if ok, -ve on error
  */
-static int init_tegra_keyboard(void)
+static int init_tegra_keyboard(struct stdio_dev *dev)
 {
 	/* check if already created */
 	if (config.created)