libchip/serial: Add alternative NS16550 driver

Use the Termios device API.

1 files changed, 88 insertions, 12 deletions

diff --git a/c/src/libchip/serial/ns16550.c b/c/src/libchip/serial/ns16550.c
index 390c729a54..b0aa38ff92 100644
--- a/c/src/libchip/serial/ns16550.c
+++ b/c/src/libchip/serial/ns16550.c
@@ -58,6 +58,82 @@
   #endif
 #endif
 
+typedef struct {
+  uint8_t ucModemCtrl;
+  int transmitFifoChars;
+} NS16550Context;
+
+/*
+ * Driver functions
+ */
+
+NS16550_STATIC void ns16550_init(int minor);
+
+NS16550_STATIC int ns16550_open(
+  int major,
+  int minor,
+  void  * arg
+);
+
+NS16550_STATIC int ns16550_close(
+  int major,
+  int minor,
+  void  * arg
+);
+
+NS16550_STATIC void ns16550_write_polled(
+  int   minor,
+  char  cChar
+);
+
+NS16550_STATIC int ns16550_assert_RTS(
+  int minor
+);
+
+NS16550_STATIC int ns16550_negate_RTS(
+  int minor
+);
+
+NS16550_STATIC int ns16550_assert_DTR(
+  int minor
+);
+
+NS16550_STATIC int ns16550_negate_DTR(
+  int minor
+);
+
+NS16550_STATIC void ns16550_initialize_interrupts(int minor);
+
+NS16550_STATIC void ns16550_cleanup_interrupts(int minor);
+
+NS16550_STATIC ssize_t ns16550_write_support_int(
+  int   minor,
+  const char *buf,
+  size_t len
+);
+
+NS16550_STATIC ssize_t ns16550_write_support_polled(
+  int   minor,
+  const char *buf,
+  size_t len
+  );
+
+int ns16550_inbyte_nonblocking_polled(
+  int minor
+);
+
+NS16550_STATIC void ns16550_enable_interrupts(
+  console_tbl *c,
+  int         mask
+);
+
+NS16550_STATIC int ns16550_set_attributes(
+  int                   minor,
+  const struct termios *t
+);
+
+NS16550_STATIC void ns16550_isr(void *arg);
+
 static rtems_interrupt_lock ns16550_lock =
   RTEMS_INTERRUPT_LOCK_INITIALIZER("NS16550");
 
@@ -142,12 +218,12 @@ void ns16550_init(int minor)
   uintptr_t               pNS16550;
   uint8_t                 ucDataByte;
   uint32_t                ulBaudDivisor;
-  ns16550_context        *pns16550Context;
+  NS16550Context        *pns16550Context;
   setRegister_f           setReg;
   getRegister_f           getReg;
   console_tbl             *c = Console_Port_Tbl [minor];
 
-  pns16550Context=(ns16550_context *)malloc(sizeof(ns16550_context));
+  pns16550Context=(NS16550Context *)malloc(sizeof(NS16550Context));
 
   if (pns16550Context == NULL) {
     printk( "%s: Error: Not enough memory\n", __func__);
@@ -328,10 +404,10 @@ NS16550_STATIC int ns16550_assert_RTS(int minor)
 {
   uint32_t                pNS16550;
   rtems_interrupt_lock_context lock_context;
-  ns16550_context        *pns16550Context;
+  NS16550Context        *pns16550Context;
   setRegister_f           setReg;
 
-  pns16550Context=(ns16550_context *) Console_Port_Data[minor].pDeviceContext;
+  pns16550Context=(NS16550Context *) Console_Port_Data[minor].pDeviceContext;
 
   pNS16550 = Console_Port_Tbl[minor]->ulCtrlPort1;
   setReg   = Console_Port_Tbl[minor]->setRegister;
@@ -354,10 +430,10 @@ NS16550_STATIC int ns16550_negate_RTS(int minor)
 {
   uint32_t                pNS16550;
   rtems_interrupt_lock_context lock_context;
-  ns16550_context        *pns16550Context;
+  NS16550Context        *pns16550Context;
   setRegister_f           setReg;
 
-  pns16550Context=(ns16550_context *) Console_Port_Data[minor].pDeviceContext;
+  pns16550Context=(NS16550Context *) Console_Port_Data[minor].pDeviceContext;
 
   pNS16550 = Console_Port_Tbl[minor]->ulCtrlPort1;
   setReg   = Console_Port_Tbl[minor]->setRegister;
@@ -385,10 +461,10 @@ NS16550_STATIC int ns16550_assert_DTR(int minor)
 {
   uint32_t                pNS16550;
   rtems_interrupt_lock_context lock_context;
-  ns16550_context        *pns16550Context;
+  NS16550Context        *pns16550Context;
   setRegister_f           setReg;
 
-  pns16550Context=(ns16550_context *) Console_Port_Data[minor].pDeviceContext;
+  pns16550Context=(NS16550Context *) Console_Port_Data[minor].pDeviceContext;
 
   pNS16550 = Console_Port_Tbl[minor]->ulCtrlPort1;
   setReg   = Console_Port_Tbl[minor]->setRegister;
@@ -411,10 +487,10 @@ NS16550_STATIC int ns16550_negate_DTR(int minor)
 {
   uint32_t                pNS16550;
   rtems_interrupt_lock_context lock_context;
-  ns16550_context        *pns16550Context;
+  NS16550Context        *pns16550Context;
   setRegister_f           setReg;
 
-  pns16550Context=(ns16550_context *) Console_Port_Data[minor].pDeviceContext;
+  pns16550Context=(NS16550Context *) Console_Port_Data[minor].pDeviceContext;
 
   pNS16550 = Console_Port_Tbl[minor]->ulCtrlPort1;
   setReg   = Console_Port_Tbl[minor]->setRegister;
@@ -533,7 +609,7 @@ NS16550_STATIC void ns16550_process( int minor)
 {
   console_tbl *c = Console_Port_Tbl [minor];
   console_data *d = &Console_Port_Data [minor];
-  ns16550_context *ctx = d->pDeviceContext;
+  NS16550Context *ctx = d->pDeviceContext;
   uint32_t port = c->ulCtrlPort1;
   getRegister_f get = c->getRegister;
   int i = 0;
@@ -584,7 +660,7 @@ ssize_t ns16550_write_support_int(
 {
   console_tbl *c = Console_Port_Tbl [minor];
   console_data *d = &Console_Port_Data [minor];
-  ns16550_context *ctx = d->pDeviceContext;
+  NS16550Context *ctx = d->pDeviceContext;
   uint32_t port = c->ulCtrlPort1;
   setRegister_f set = c->setRegister;
   int i = 0;