pc386: Add Edison base support

The current support for the Edison supports a single polled
UART for input and output plus a simulated clock tick. The
activities forward for supporting the Edison have been posted
on the RTEMS mailing lists and at:

http://rtemsramblings.blogspot.com/2014/12/intel-edison-and-rtems-road-forward.html

3 files changed, 129 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/i386/pc386/console/conscfg.c b/c/src/lib/libbsp/i386/pc386/console/conscfg.c
index a34f0e5217..d5586d74db 100644
--- a/c/src/lib/libbsp/i386/pc386/console/conscfg.c
+++ b/c/src/lib/libbsp/i386/pc386/console/conscfg.c
@@ -60,7 +60,32 @@
   }
 #endif
 
+#if (BSP_IS_EDISON == 1 )
+  extern const console_fns edison_fns;
+#endif
+
 console_tbl     Console_Configuration_Ports[] = {
+#if (BSP_IS_EDISON == 1)
+  {
+    "/dev/vgacons",                        /* sDeviceName */
+    -1,                                     /* deviceType */
+    &edison_fns,                           /* pDeviceFns */
+    NULL,                                  /* deviceProbe */
+    NULL,                                  /* pDeviceFlow */
+    16,                                    /* ulMargin */
+    8,                                     /* ulHysteresis */
+    (void *) NULL,              /* NULL */ /* pDeviceParams */
+    0x00000000,                            /* ulCtrlPort1 */
+    0x00000000,                            /* ulCtrlPort2 */
+    0x00000000,                            /* ulDataPort */
+    NULL,                                  /* getRegister */
+    NULL,                                  /* setRegister */
+    NULL,/* unused */                      /* getData */
+    NULL,/* unused */                      /* setData */
+    0X0,                                   /* ulClock */
+    0x0                                     /* ulIntVector -- base for port */
+  },
+#endif
 #if BSP_ENABLE_VGA
   {
     "/dev/vgacons",                        /* sDeviceName */
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 */
+};
diff --git a/c/src/lib/libbsp/i386/pc386/console/printk_support.c b/c/src/lib/libbsp/i386/pc386/console/printk_support.c
index c6b0fe5c00..d4adf555e7 100644
--- a/c/src/lib/libbsp/i386/pc386/console/printk_support.c
+++ b/c/src/lib/libbsp/i386/pc386/console/printk_support.c
@@ -29,6 +29,11 @@
 
 rtems_device_minor_number         BSPPrintkPort = 0;
 
+#if (BSP_IS_EDISON == 1)
+void edison_write_polled(int minor, char cChar); /* XXX */
+int edison_inbyte_nonblocking_polled(int minor);
+#endif
+
 #if BSP_ENABLE_COM1_COM4
 int ns16550_inbyte_nonblocking_polled( int minor );
 #endif
@@ -66,6 +71,11 @@ int BSP_inch(void)
       } while (result == -1);
     }
   #endif
+  #if (BSP_IS_EDISON == 1)
+    do {
+      result = edison_inbyte_nonblocking_polled( BSPPrintkPort );
+    } while (result == -1);
+  #endif
   return result;
 }