1 files changed, 108 insertions, 0 deletions
diff --git a/c/src/lib/libbsp/arm/shared/arm-pl011.c b/c/src/lib/libbsp/arm/shared/arm-pl011.c
new file mode 100644
index 0000000000..e84b3e8473
--- /dev/null
+++ b/c/src/lib/libbsp/arm/shared/arm-pl011.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2013 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <info@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.com/license/LICENSE.
+ */
+
+#include <bsp/arm-pl011.h>
+#include <bsp/arm-pl011-regs.h>
+
+#include <libchip/sersupp.h>
+
+static volatile pl011 *pl011_get_regs(int minor)
+{
+  const console_tbl *ct = Console_Port_Tbl != NULL ?
+    Console_Port_Tbl[minor] : &Console_Configuration_Ports[minor];
+
+  return (volatile pl011 *) ct->ulCtrlPort1;
+}
+
+static void pl011_initialize(int minor)
+{
+  volatile pl011 *regs = pl011_get_regs(minor);
+
+  regs->uartlcr_h = PL011_UARTLCR_H_WLEN(PL011_UARTLCR_H_WLEN_8);
+  regs->uartcr = PL011_UARTCR_RXE
+    | PL011_UARTCR_TXE
+    | PL011_UARTCR_UARTEN;
+}
+
+static int pl011_first_open(int major, int minor, void *arg)
+{
+  rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg;
+  struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1;
+  console_data *cd = &Console_Port_Data[minor];
+  const console_tbl *ct = Console_Port_Tbl[minor];
+
+  cd->termios_data = tty;
+  rtems_termios_set_initial_baud(tty, (rtems_termios_baud_t) ct->pDeviceParams);
+
+  return 0;
+}
+
+static int pl011_last_close(int major, int minor, void *arg)
+{
+  return 0;
+}
+
+static int pl011_read_polled(int minor)
+{
+  volatile pl011 *regs = pl011_get_regs(minor);
+
+  if ((regs->uartfr & PL011_UARTFR_RXFE) != 0) {
+    return -1;
+  } else {
+    return PL011_UARTDR_DATA(regs->uartdr);
+  }
+}
+
+static void pl011_write_polled(int minor, char c)
+{
+  volatile pl011 *regs = pl011_get_regs(minor);
+
+  while ((regs->uartfr & PL011_UARTFR_TXFF) != 0) {
+    /* Wait */
+  }
+
+  regs->uartdr = PL011_UARTDR_DATA(c);
+}
+
+static ssize_t pl011_write_support_polled(
+  int minor,
+  const char *s,
+  size_t n
+)
+{
+  ssize_t i = 0;
+
+  for (i = 0; i < n; ++i) {
+    pl011_write_polled(minor, s[i]);
+  }
+
+  return n;
+}
+
+static int pl011_set_attribues(int minor, const struct termios *term)
+{
+  return -1;
+}
+
+const console_fns arm_pl011_fns = {
+  .deviceProbe = libchip_serial_default_probe,
+  .deviceFirstOpen = pl011_first_open,
+  .deviceLastClose = pl011_last_close,
+  .deviceRead = pl011_read_polled,
+  .deviceWrite = pl011_write_support_polled,
+  .deviceInitialize = pl011_initialize,
+  .deviceWritePolled = pl011_write_polled,
+  .deviceSetAttributes = pl011_set_attribues,
+  .deviceOutputUsesInterrupts = false
+};