static void uart00_tx_chars(struct uart_port *port) { struct circ_buf *xmit = &port->info->xmit; int count; if (port->x_char) { while ((UART_GET_TSR(port) & UART_TSR_TX_LEVEL_MSK) == 15) barrier(); UART_PUT_CHAR(port, port->x_char); port->icount.tx++; port->x_char = 0; return; } if (uart_circ_empty(xmit) || uart_tx_stopped(port)) { uart00_stop_tx(port); return; } count = port->fifosize >> 1; do { while ((UART_GET_TSR(port) & UART_TSR_TX_LEVEL_MSK) == 15) barrier(); UART_PUT_CHAR(port, xmit->buf[xmit->tail]); xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; if (uart_circ_empty(xmit)) break; } while (--count > 0); if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS) uart_write_wakeup(port); if (uart_circ_empty(xmit)) uart00_stop_tx(port); }
static void uart00_console_write(struct console *co, const char *s, unsigned count) { #ifdef CONFIG_ARCH_CAMELOT struct uart_port *port = &epxa10db_port; unsigned int status, old_ies; int i; /* * First save the CR then disable the interrupts */ old_ies = UART_GET_IES(port); UART_PUT_IEC(port,0xff); /* * Now, do each character */ for (i = 0; i < count; i++) { do { status = UART_GET_TSR(port); } while (!UART_TX_READY(status)); UART_PUT_CHAR(port, s[i]); if (s[i] == '\n') { do { status = UART_GET_TSR(port); } while (!UART_TX_READY(status)); UART_PUT_CHAR(port, '\r'); } } /* * Finally, wait for transmitter to become empty * and restore the IES */ do { status = UART_GET_TSR(port); } while (status & UART_TSR_TX_LEVEL_MSK); UART_PUT_IES(port, old_ies); #endif }
static void uart00_tx_chars(struct uart_port *port) { int count; struct uart_info *info = port->info; if (port->x_char) { while((UART_GET_TSR(port)& UART_TSR_TX_LEVEL_MSK)==15); UART_PUT_CHAR(port, port->x_char); port->icount.tx++; port->x_char = 0; return; } if (info->xmit.head == info->xmit.tail || info->tty->stopped || info->tty->hw_stopped) { uart00_stop_tx(port, 0); return; } count = port->fifosize >> 1; do { while((UART_GET_TSR(port)& UART_TSR_TX_LEVEL_MSK)==15); UART_PUT_CHAR(port, info->xmit.buf[info->xmit.tail]); info->xmit.tail = (info->xmit.tail + 1) & (UART_XMIT_SIZE - 1); port->icount.tx++; if (info->xmit.head == info->xmit.tail) break; } while (--count > 0); if (CIRC_CNT(info->xmit.head, info->xmit.tail, UART_XMIT_SIZE) < WAKEUP_CHARS) uart_write_wakeup(port); if (info->xmit.head == info->xmit.tail) uart00_stop_tx(port, 0); }
static unsigned int uart00_tx_empty(struct uart_port *port) { return UART_GET_TSR(port) & UART_TSR_TX_LEVEL_MSK? 0 : TIOCSER_TEMT; }