Input: libps2 - use u8 for byte data

Instead of using unsigned char for the byte data switch to using u8. Also
use unsigned int for the command codes and timeouts, and have
ps2_handle_ack() and ps2_handle_response() return bool instead of int, as
they do not return error codes but rather signal whether a byte was handled
or not handled. ps2_is_keyboard_id() now returns bool as well.

Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

2 files changed, 29 insertions, 25 deletions

diff --git a/drivers/input/serio/libps2.c b/drivers/input/serio/libps2.c
index 21aea5169a99..c3712f0a47b5 100644
--- a/drivers/input/serio/libps2.c
+++ b/drivers/input/serio/libps2.c
@@ -34,7 +34,7 @@ MODULE_LICENSE("GPL");
  * ps2_sendbyte() can only be called from a process context.
  */
 
-int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout)
+int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout)
 {
 	serio_pause_rx(ps2dev->serio);
 	ps2dev->nak = 1;
@@ -75,7 +75,7 @@ EXPORT_SYMBOL(ps2_end_command);
  * and discards them.
  */
 
-void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout)
+void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout)
 {
 	if (maxbytes > sizeof(ps2dev->cmdbuf)) {
 		WARN_ON(1);
@@ -102,9 +102,9 @@ EXPORT_SYMBOL(ps2_drain);
  * known keyboard IDs.
  */
 
-int ps2_is_keyboard_id(char id_byte)
+bool ps2_is_keyboard_id(u8 id_byte)
 {
-	static const char keyboard_ids[] = {
+	static const u8 keyboard_ids[] = {
 		0xab,	/* Regular keyboards		*/
 		0xac,	/* NCD Sun keyboard		*/
 		0x2b,	/* Trust keyboard, translated	*/
@@ -123,7 +123,8 @@ EXPORT_SYMBOL(ps2_is_keyboard_id);
  * completion.
  */
 
-static int ps2_adjust_timeout(struct ps2dev *ps2dev, int command, int timeout)
+static int ps2_adjust_timeout(struct ps2dev *ps2dev,
+			      unsigned int command, unsigned int timeout)
 {
 	switch (command) {
 	case PS2_CMD_RESET_BAT:
@@ -178,11 +179,11 @@ static int ps2_adjust_timeout(struct ps2dev *ps2dev, int command, int timeout)
  * ps2_command() can only be called from a process context
  */
 
-int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
+int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command)
 {
-	int timeout;
-	int send = (command >> 12) & 0xf;
-	int receive = (command >> 8) & 0xf;
+	unsigned int timeout;
+	unsigned int send = (command >> 12) & 0xf;
+	unsigned int receive = (command >> 8) & 0xf;
 	int rc = -1;
 	int i;
 
@@ -256,7 +257,7 @@ int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
 }
 EXPORT_SYMBOL(__ps2_command);
 
-int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command)
+int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command)
 {
 	int rc;
 
@@ -286,7 +287,7 @@ EXPORT_SYMBOL(ps2_init);
  * to properly process ACK/NAK of a command from a PS/2 device.
  */
 
-int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data)
+bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data)
 {
 	switch (data) {
 	case PS2_RET_ACK:
@@ -318,7 +319,7 @@ int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data)
 		}
 		/* Fall through */
 	default:
-		return 0;
+		return false;
 	}
 
 	if (!ps2dev->nak) {
@@ -333,7 +334,7 @@ int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data)
 	if (data != PS2_RET_ACK)
 		ps2_handle_response(ps2dev, data);
 
-	return 1;
+	return true;
 }
 EXPORT_SYMBOL(ps2_handle_ack);
 
@@ -343,7 +344,7 @@ EXPORT_SYMBOL(ps2_handle_ack);
  * waiting for completion of the command.
  */
 
-int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data)
+bool ps2_handle_response(struct ps2dev *ps2dev, u8 data)
 {
 	if (ps2dev->cmdcnt)
 		ps2dev->cmdbuf[--ps2dev->cmdcnt] = data;
@@ -359,7 +360,7 @@ int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data)
 		wake_up(&ps2dev->wait);
 	}
 
-	return 1;
+	return true;
 }
 EXPORT_SYMBOL(ps2_handle_response);
 
diff --git a/include/linux/libps2.h b/include/linux/libps2.h
index 4ad06e824f76..04a5750f1e4e 100644
--- a/include/linux/libps2.h
+++ b/include/linux/libps2.h
@@ -10,6 +10,9 @@
  * the Free Software Foundation.
  */
 
+#include <linux/mutex.h>
+#include <linux/types.h>
+#include <linux/wait.h>
 
 #define PS2_CMD_GETID		0x02f2
 #define PS2_CMD_RESET_BAT	0x02ff
@@ -36,21 +39,21 @@ struct ps2dev {
 	wait_queue_head_t wait;
 
 	unsigned long flags;
-	unsigned char cmdbuf[8];
-	unsigned char cmdcnt;
-	unsigned char nak;
+	u8 cmdbuf[8];
+	u8 cmdcnt;
+	u8 nak;
 };
 
 void ps2_init(struct ps2dev *ps2dev, struct serio *serio);
-int ps2_sendbyte(struct ps2dev *ps2dev, unsigned char byte, int timeout);
-void ps2_drain(struct ps2dev *ps2dev, int maxbytes, int timeout);
+int ps2_sendbyte(struct ps2dev *ps2dev, u8 byte, unsigned int timeout);
+void ps2_drain(struct ps2dev *ps2dev, size_t maxbytes, unsigned int timeout);
 void ps2_begin_command(struct ps2dev *ps2dev);
 void ps2_end_command(struct ps2dev *ps2dev);
-int __ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
-int ps2_command(struct ps2dev *ps2dev, unsigned char *param, int command);
-int ps2_handle_ack(struct ps2dev *ps2dev, unsigned char data);
-int ps2_handle_response(struct ps2dev *ps2dev, unsigned char data);
+int __ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
+int ps2_command(struct ps2dev *ps2dev, u8 *param, unsigned int command);
+bool ps2_handle_ack(struct ps2dev *ps2dev, u8 data);
+bool ps2_handle_response(struct ps2dev *ps2dev, u8 data);
 void ps2_cmd_aborted(struct ps2dev *ps2dev);
-int ps2_is_keyboard_id(char id);
+bool ps2_is_keyboard_id(u8 id);
 
 #endif /* _LIBPS2_H */