added copyright and license notice.

[max/tmk_keyboard.git] / ps2.c

diff --git a/ps2.c b/ps2.c
index 52ee1691fbe2b5ac5eab58a4498d66d95cb81795..8a05916210d77b4741c060c543a45fad75a102e2 100644 (file)
--- a/ps2.c
+++ b/ps2.c
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2010,2011 Jun WAKO <wakojun@gmail.com>
+Copyright 2010,2011 Jun WAKO <wakojun@gmail.com>
 
 This software is licensed with a Modified BSD License.
 All of this is supposed to be Free Software, Open Source, DFSG-free,
@@ -34,6 +34,7 @@ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
 */
+
 #include <stdbool.h>
 #include <avr/io.h>
 #include <avr/interrupt.h>
@@ -187,6 +188,9 @@ static inline void pbuf_enqueue(uint8_t data)
 {
     if (!data)
         return;
+
+    uint8_t sreg = SREG;
+    cli();
     uint8_t next = (pbuf_head + 1) % PBUF_SIZE;
     if (next != pbuf_tail) {
         pbuf[pbuf_head] = data;
@@ -194,10 +198,12 @@ static inline void pbuf_enqueue(uint8_t data)
     } else {
         debug("pbuf: full\n");
     }
+    SREG = sreg;
 }
 static inline uint8_t pbuf_dequeue(void)
 {
     uint8_t val = 0;
+
     uint8_t sreg = SREG;
     cli();
     if (pbuf_head != pbuf_tail) {
@@ -205,22 +211,30 @@ static inline uint8_t pbuf_dequeue(void)
         pbuf_tail = (pbuf_tail + 1) % PBUF_SIZE;
     }
     SREG = sreg;
+
     return val;
 }
 
 /* get data received by interrupt */
 uint8_t ps2_host_recv(void)
 {
-    // TODO: release clock line after 100us when inhibited by error
     if (ps2_error) {
+        print("x");
+        phex(ps2_error);
         ps2_host_send(0xFE);    // request to resend
         ps2_error = PS2_ERR_NONE;
     }
+    idle();
     return pbuf_dequeue();
 }
 
+#if 0
 #define DEBUGP_INIT() do { DDRC = 0xFF; } while (0)
 #define DEBUGP(x) do { PORTC = x; } while (0)
+#else
+#define DEBUGP_INIT()
+#define DEBUGP(x)
+#endif
 ISR(PS2_INT_VECT)
 {
     static enum {
@@ -281,7 +295,7 @@ ISR(PS2_INT_VECT)
     }
     goto RETURN;
 ERROR:
-    DEBUGP(0xFF);
+    DEBUGP(0x0F);
     inhibit();
     ps2_error = state;
 DONE: