fix: corner cases when printing large content through term interface

[lunaix-os.git] / lunaix-os / hal / char / uart / 16550.h

diff --git a/lunaix-os/hal/char/uart/16550.h b/lunaix-os/hal/char/uart/16550.h
index a6565752eca4e8bb3e2c251875e5c13e4c9ab4b2..ccee4151853e5138e336626bc87ea0d1bba20a34 100644 (file)
--- a/lunaix-os/hal/char/uart/16550.h
+++ b/lunaix-os/hal/char/uart/16550.h
@@ -25,14 +25,20 @@
 #define UART_rIE_ELSI (1 << 2)
 #define UART_rIE_EDSSI (1 << 3)
 
+#define UART_rLC_STOPB (1 << 2)
+#define UART_rLC_PAREN (1 << 3)
+#define UART_rLC_PAREVN (1 << 4)
+#define UART_rLC_SETBRK (1 << 6)
+
 #define UART_rLS_THRE (1 << 5)
 #define UART_rLS_DR 1
 #define UART_rLS_BI (1 << 4)
 
 #define UART_rII_FIFOEN (0b11 << 6)
-#define UART_rII_ID 0b1110
+#define UART_rII_ID 0b1111
 
 #define UART_rFC_EN 1
+#define UART_rFC_DMA1 (1 << 3)
 #define UART_rFC_XMIT_RESET (1 << 2)
 #define UART_rFC_RCVR_RESET (1 << 1)
 
@@ -64,6 +70,7 @@ struct uart16550
         u8_t rie;
         u8_t rfc;
         u8_t rmc;
+        u8_t rlc;
     } cntl_save;
 
     u32_t (*read_reg)(struct uart16550* uart, ptr_t regoff);
@@ -80,16 +87,22 @@ uart_setup(struct uart16550* uart)
 }
 
 static inline void
-uart_setie(struct uart16550* uart)
+uart_clrie(struct uart16550* uart)
 {
     uart->cntl_save.rie = uart->read_reg(uart, UART_rIE);
     uart->write_reg(uart, UART_rIE, 0);
 }
 
 static inline void
-uart_clrie(struct uart16550* uart)
+uart_setie(struct uart16550* uart)
+{
+    uart->write_reg(uart, UART_rIE, uart->cntl_save.rie);
+}
+
+static inline void
+uart_setlc(struct uart16550* uart)
 {
-    uart->write_reg(uart, UART_rIE, uart->cntl_save.rie | 1);
+    uart->write_reg(uart, UART_rLC, uart->cntl_save.rlc);
 }
 
 struct uart16550*
@@ -155,7 +168,8 @@ uart_eorcv(struct uart16550* uart)
 static inline int
 uart_enable_fifo(struct uart16550* uart, int trig_lvl)
 {
-    uart->cntl_save.rfc = UART_rFC_EN | (trig_lvl & 0b11);
+    uart->cntl_save.rfc =
+      UART_rFC_EN | ((trig_lvl & 0b11) << 6) | UART_rFC_DMA1;
     uart->write_reg(uart, UART_rFC, uart->cntl_save.rfc);
 
     return uart->read_reg(uart, UART_rII) & UART_rII_FIFOEN;
@@ -184,7 +198,7 @@ static inline int
 uart_intr_identify(struct uart16550* uart)
 {
     u32_t rii = uart->read_reg(uart, UART_rII);
-    return (!!(rii & UART_rII_FIFOEN) << 3) | ((rii & UART_rII_ID) >> 1);
+    return (rii & UART_rII_ID);
 }
 
 static inline u8_t