Add basic OMAP2 chip support.

[qemu] / hw / omap_i2c.c

diff --git a/hw/omap_i2c.c b/hw/omap_i2c.c
index de63309..9915676 100644 (file)
--- a/hw/omap_i2c.c
+++ b/hw/omap_i2c.c
@@ -150,6 +150,8 @@ static void omap_i2c_fifo_run(struct omap_i2c_s *s)
             }
             if (ack && s->count_cur)
                 s->stat |= 1 << 4;                             /* XRDY */
+            else
+                s->stat &= ~(1 << 4);                          /* XRDY */
             if (!s->count_cur) {
                 s->stat |= 1 << 2;                             /* ARDY */
                 s->control &= ~(1 << 10);                      /* MST */
@@ -161,6 +163,8 @@ static void omap_i2c_fifo_run(struct omap_i2c_s *s)
             }
             if (s->rxlen)
                 s->stat |= 1 << 3;                             /* RRDY */
+            else
+                s->stat &= ~(1 << 3);                          /* RRDY */
         }
         if (!s->count_cur) {
             if ((s->control >> 1) & 1) {                       /* STP */
@@ -321,7 +325,8 @@ static void omap_i2c_write(void *opaque, target_phys_addr_t addr,
             return;
         }
 
-        s->stat &= ~(value & 0x3f);
+        /* RRDY and XRDY are reset by hardware. (in all versions???) */
+        s->stat &= ~(value & 0x27);
         omap_i2c_interrupts_update(s);
         break;
 
@@ -376,11 +381,13 @@ static void omap_i2c_write(void *opaque, target_phys_addr_t addr,
             break;
         }
         if ((value & (1 << 15)) && !(value & (1 << 10))) {     /* MST */
-            printf("%s: I^2C slave mode not supported\n", __FUNCTION__);
+            fprintf(stderr, "%s: I^2C slave mode not supported\n",
+                            __FUNCTION__);
             break;
         }
         if ((value & (1 << 15)) && value & (1 << 8)) {         /* XA */
-            printf("%s: 10-bit addressing mode not supported\n", __FUNCTION__);
+            fprintf(stderr, "%s: 10-bit addressing mode not supported\n",
+                            __FUNCTION__);
             break;
         }
         if ((value & (1 << 15)) && value & (1 << 0)) {         /* STT */
@@ -427,7 +434,7 @@ static void omap_i2c_write(void *opaque, target_phys_addr_t addr,
                 omap_i2c_interrupts_update(s);
             }
         if (value & (1 << 15))                                 /* ST_EN */
-            printf("%s: System Test not supported\n", __FUNCTION__);
+            fprintf(stderr, "%s: System Test not supported\n", __FUNCTION__);
         break;
 
     default: