static void irq_handler(void *arg) { int minor = (int)arg; console_data *cd = &Console_Port_Data [minor]; volatile lm3s69xx_uart *uart = get_uart_regs(minor); do { char buf[LM3S69XX_UART_FIFO_DEPTH]; int i = 0; uint32_t status = uart->fr; while (((status & UARTFR_RXFE) == 0) && (i < LM3S69XX_UART_FIFO_DEPTH)) { uint32_t d = uart->dr; if ((d & UARTDR_ERROR_MSK) == 0) { buf[i] = UARTDR_DATA_GET(d); i++; } status = uart->fr; } if (i > 0) rtems_termios_enqueue_raw_characters(cd->termios_data, buf, i); } while (uart->mis != 0); }
static int last_close(int major, int minor, void *arg) { volatile lm3s69xx_uart *uart = get_uart_regs(minor); uart->im = 0; return 0; }
static void initialize(int minor) { volatile lm3s69xx_uart *uart = get_uart_regs(minor); uart->ctl = 0; uart->lcrh = UARTLCRH_WLEN(0x3) | UARTLCRH_FEN; uart->ctl = UARTCTL_RXE | UARTCTL_TXE | UARTCTL_UARTEN; }
static void write_polled(int minor, char c) { volatile lm3s69xx_uart *uart = get_uart_regs(minor); while ((uart->fr & UARTFR_TXFF) != 0) { /* Wait */ } uart->dr = UARTDR_DATA(c); }
static int read_polled(int minor) { volatile lm3s69xx_uart *uart = get_uart_regs(minor); if ((uart->fr & UARTFR_RXFE) != 0) { return -1; } else { return UARTDR_DATA(uart->dr); } }
static int first_open(int major, int minor, void *arg) { rtems_libio_open_close_args_t *oc = (rtems_libio_open_close_args_t *) arg; struct rtems_termios_tty *tty = (struct rtems_termios_tty *) oc->iop->data1; console_data *cd = &Console_Port_Data [minor]; volatile lm3s69xx_uart *uart = get_uart_regs(minor); cd->termios_data = tty; rtems_termios_set_initial_baud(tty, LM3S69XX_UART_BAUD); /* Drain the RX FIFO. */ while ((uart->fr & UARTFR_RXFE) == 0) (void)uart->dr; uart->im = UARTI_RX | UARTI_RT; return 0; }
static void initialize(int minor) { const console_tbl *ct = Console_Port_Tbl[minor]; volatile lm3s69xx_uart *uart = get_uart_regs(minor); unsigned int num = get_uart_number(minor); lm3s69xx_syscon_enable_uart_clock(num, true); uart->ctl &= ~UARTCTL_UARTEN; uint32_t brd = get_baud_div(LM3S69XX_UART_BAUD); uart->ibrd = brd / 64; uart->fbrd = brd % 64; uart->lcrh = UARTLCRH_WLEN(0x3) | UARTLCRH_FEN; uart->cc = UARTCC_CS(0x0); uart->ctl = UARTCTL_RXE | UARTCTL_TXE | UARTCTL_UARTEN; int rv = rtems_interrupt_handler_install(ct->ulIntVector, "UART", RTEMS_INTERRUPT_UNIQUE, irq_handler, (void *)minor); assert(rv == RTEMS_SUCCESSFUL); }