1 files changed, 94 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/i386/pc386/console/console_edison.c b/c/src/lib/libbsp/i386/pc386/console/console_edison.c
new file mode 100644
index 0000000000..d5e44aed86
--- /dev/null
+++ b/c/src/lib/libbsp/i386/pc386/console/console_edison.c
@@ -0,0 +1,94 @@
+
+#include <bsp.h>
+#include <libchip/serial.h>
+
+/* XXX hack until real support is available, code copied from libchip */
+#define NS16550_RECEIVE_BUFFER   0
+#define NS16550_TRANSMIT_BUFFER  0
+#define NS16550_INTERRUPT_ENABLE 1
+#define NS16550_INTERRUPT_ID     2
+#define NS16550_FIFO_CONTROL     2
+#define NS16550_LINE_CONTROL     3
+#define NS16550_MODEM_CONTROL    4
+#define NS16550_LINE_STATUS      5
+#define NS16550_MODEM_STATUS     6
+#define NS16550_SCRATCH_PAD      7
+#define NS16550_FRACTIONAL_DIVIDER 10
+
+/* status bits we use in line status */
+
+#define SP_LSR_TX     0x40
+#define SP_LSR_THOLD  0x20
+#define SP_LSR_RDY    0x01
+static volatile uint8_t *edison_com = (volatile uint8_t *)0xff010180;
+
+void edison_write_polled(int minor, char cChar);
+int edison_inbyte_nonblocking_polled(int minor);
+
+static int edison_open(int major, int minor, void *arg)
+{
+  return 0;
+}
+
+static int edison_close(int major, int minor, void *arg)
+{
+  return 0;
+}
+
+int edison_inbyte_nonblocking_polled(int minor)
+{
+  if ( edison_com[NS16550_LINE_STATUS] & 0x01 )
+    return (int) edison_com[NS16550_RECEIVE_BUFFER];
+  return -1;
+}
+
+static ssize_t edison_write_support_polled(int minor, const char *buf, size_t len)
+{
+  ssize_t i;
+
+  for ( i=0 ; i<len ; i++ ) {
+#if 0
+    if ( (edison_com[NS16550_LINE_STATUS] & SP_LSR_TX) == 0 )
+      break;
+#else
+    while ( (edison_com[NS16550_LINE_STATUS] & SP_LSR_TX) == 0x00 )
+      /* wait until ready */;
+#endif
+    edison_com[NS16550_TRANSMIT_BUFFER] = (uint8_t) buf[i];
+  }
+  return i;
+}
+
+static void edison_init(int minor)
+{
+}
+
+void edison_write_polled(int minor, char cChar)
+{
+  while ( (edison_com[NS16550_LINE_STATUS] & SP_LSR_TX) == 0x00 )
+    /* wait until ready */;
+  edison_com[NS16550_TRANSMIT_BUFFER] = (uint8_t) cChar;
+}
+
+static bool edison_probe(int minor)
+{
+  return true;
+}
+
+static int edison_set_attributes(int minor, const struct termios *t)
+{
+  return 0;
+}
+
+const console_fns edison_fns =
+{
+  edison_probe,                       /* deviceProbe */
+  edison_open,                        /* deviceFirstOpen */
+  edison_close,                       /* deviceLastClose */
+  edison_inbyte_nonblocking_polled,   /* deviceRead */
+  edison_write_support_polled,        /* deviceWrite */
+  edison_init,                        /* deviceInitialize */
+  edison_write_polled,                /* deviceWritePolled */
+  edison_set_attributes,              /* deviceSetAttributes */
+  FALSE,                              /* deviceOutputUsesInterrupts */
+};