[PATCH 2/3] serial: Move static ns8250 functions to ns8250 interface

[Matthias Lange]

In order to reuse some ns8250 functions in other ns8250 compatible
drivers this change makes a few functions non-static and adds them
to the ns8250 interface in the ns8250.h header file.

Signed-off-by: Matthias Lange <address@hidden>
---
 grub-core/term/ns8250.c |  8 ++++----
 include/grub/ns8250.h   | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/grub-core/term/ns8250.c b/grub-core/term/ns8250.c
index acc05eb..051021a 100644
--- a/grub-core/term/ns8250.c
+++ b/grub-core/term/ns8250.c
@@ -57,7 +57,7 @@ io_port_write (struct grub_serial_port *port, unsigned char 
value, grub_addr_t r
 }
 
 /* Convert speed to divisor.  */
-static unsigned short
+unsigned short
 serial_get_divisor (const struct grub_serial_port *port,
                    const struct grub_serial_config *config)
 {
@@ -153,7 +153,7 @@ do_real_config (struct grub_serial_port *port)
 }
 
 /* Fetch a key.  */
-static int
+int
 serial_hw_fetch (struct grub_serial_port *port)
 {
   do_real_config (port);
@@ -164,7 +164,7 @@ serial_hw_fetch (struct grub_serial_port *port)
 }
 
 /* Put a character.  */
-static void
+void
 serial_hw_put (struct grub_serial_port *port, const int c)
 {
   grub_uint64_t endtime;
@@ -201,7 +201,7 @@ serial_hw_put (struct grub_serial_port *port, const int c)
    STOP_BIT_LEN is the length of the stop bit. The possible values for
    WORD_LEN, PARITY and STOP_BIT_LEN are defined in the header file as
    macros.  */
-static grub_err_t
+grub_err_t
 serial_hw_configure (struct grub_serial_port *port,
                     struct grub_serial_config *config)
 {
diff --git a/include/grub/ns8250.h b/include/grub/ns8250.h
index 7947ba9..8c15855 100644
--- a/include/grub/ns8250.h
+++ b/include/grub/ns8250.h
@@ -20,6 +20,8 @@
 #ifndef GRUB_NS8250_HEADER
 #define GRUB_NS8250_HEADER     1
 
+#include <grub/serial.h>
+
 /* Macros.  */
 
 /* The offsets of UART registers.  */
@@ -75,6 +77,52 @@
 
 grub_port_t
 grub_ns8250_hw_get_port (const unsigned int unit);
+
+/**
+ * \brief Configure and setup a serial port.
+ *
+ * \param port    The serial port that should be set up.
+ * \param config  The configuration that should be applied to the serial port.
+ *
+ * \retval GRUB_ERR_NONE          Serial port setup and configured 
successfully.
+ * \retval GRUB_ERR_BAD_ARGUMENT  Unsupported serial configuration.
+ */
+grub_err_t
+serial_hw_configure (struct grub_serial_port *port,
+                     struct grub_serial_config *config);
+
+/**
+ * \brief Calculate the divisor for a given baud rate.
+ *
+ * \param port    The serial port for which the divisor needs to be calculated.
+ * \param config  The configuration with the wanted baud rate.
+ *
+ * \retval 0   No divisor could be calculated
+ * \retval >0  The divisor that needs to be programmed into the UART.
+ */
+unsigned short
+serial_get_divisor (const struct grub_serial_port *port,
+                    const struct grub_serial_config *config);
+
+/**
+ * \brief Send a character over a serial port.
+ *
+ * \param port  The serial port over which the character should be send.
+ * \param c     The character to send over the serial port.
+ */
+void
+serial_hw_put (struct grub_serial_port *port, const int c);
+
+/**
+ * \brief Read a character from a serial port.
+ *
+ * \param port  The serial port to read the character from.
+ *
+ * \return  The character read from the serial port.
+ */
+int
+serial_hw_fetch (struct grub_serial_port *port);
+
 #endif
 
 #endif /* ! GRUB_SERIAL_MACHINE_HEADER */
-- 
2.7.4