tbblue: fill in more uart information c/o the zx next forum

diff --git a/Kernel/platform-tbblue/devtty.c b/Kernel/platform-tbblue/devtty.c
index 4d27660..82c9b8d 100644 (file)
--- a/Kernel/platform-tbblue/devtty.c
+++ b/Kernel/platform-tbblue/devtty.c
@@ -18,6 +18,8 @@ __sfr __banked __at 0x143B uart_baud;         /* Write */
 static char tbuf1[TTYSIZ];
 static char tbuf2[TTYSIZ];
 
+static uint8_t sleeping;
+
 uint8_t vtattr_cap = VTA_INVERSE|VTA_FLASH|VTA_UNDERLINE;
 extern uint8_t curattr;
 
@@ -41,7 +43,6 @@ tcflag_t *termios_mask[NUM_DEV_TTY + 1] = {
        serial_mask,
 };
 
-
 struct s_queue ttyinq[NUM_DEV_TTY + 1] = {     /* ttyinq[0] is never used */
        {NULL, NULL, NULL, 0, 0, 0},
        {tbuf1, tbuf1, tbuf1, TTYSIZ, 0, TTYSIZ / 2},
@@ -62,8 +63,9 @@ ttyready_t tty_writeready(uint8_t minor)
 {
        if (minor == 1)
                return TTY_READY_NOW;
-       // FIXME 
-       return TTY_READY_NOW;   // TTY_READY_SOON
+       if (uart_status & 0x02)
+               return TTY_READY_SOON;
+       return TTY_READY_NOW;
 }
 
 void tty_putc(uint8_t minor, unsigned char c)
@@ -76,8 +78,12 @@ void tty_putc(uint8_t minor, unsigned char c)
 
 void tty_polluart(void)
 {
-       while (!(uart_status & 1))
+       while (!(uart_status & 4))
                tty_inproc(2, uart_rx);
+       if ((sleeping & 4) &* (uart_status & 2)) {
+               sleeping &= ~4;
+               tty_outproc(2);
+       }
 }
 
 int tty_carrier(uint8_t minor)
@@ -102,12 +108,11 @@ void tty_setup(uint8_t minor, uint8_t flags)
        /* The hardware baud rates line up with our definitions from 2400 up
           but in reverse order */
        uart_baud = 6 - baud;
-       
 }
 
 void tty_sleeping(uint8_t minor)
 {
-       used(minor);
+       sleeping |= (1 << minor);
 }
 
 void tty_data_consumed(uint8_t minor)
@@ -115,7 +120,6 @@ void tty_data_consumed(uint8_t minor)
        used(minor);
 }
 
-
 /* This is used by the vt asm code, but needs to live in the kernel */
 uint16_t cursorpos;