#define MUX_BREAK(status) ((status & 0xF000) == 0x2000)
#define MUX_NR 256
-static unsigned int port_cnt = 0;
+static unsigned int port_cnt __read_mostly;
static struct uart_port mux_ports[MUX_NR];
static struct uart_driver mux_driver = {
static struct timer_list mux_timer;
-#define UART_PUT_CHAR(p, c) __raw_writel((c), (unsigned long)(p)->membase + IO_DATA_REG_OFFSET)
-#define UART_GET_FIFO_CNT(p) __raw_readl((unsigned long)(p)->membase + IO_DCOUNT_REG_OFFSET)
+#define UART_PUT_CHAR(p, c) __raw_writel((c), (p)->membase + IO_DATA_REG_OFFSET)
+#define UART_GET_FIFO_CNT(p) __raw_readl((p)->membase + IO_DCOUNT_REG_OFFSET)
#define GET_MUX_PORTS(iodc_data) ((((iodc_data)[4] & 0xf0) >> 4) * 8) + 8
/**
*/
static unsigned int mux_tx_empty(struct uart_port *port)
{
- unsigned int cnt = __raw_readl((unsigned long)port->membase
- + IO_DCOUNT_REG_OFFSET);
-
- return cnt ? 0 : TIOCSER_TEMT;
+ return UART_GET_FIFO_CNT(port) ? 0 : TIOCSER_TEMT;
}
/**
__u32 start_count = port->icount.rx;
while(1) {
- data = __raw_readl((unsigned long)port->membase
- + IO_DATA_REG_OFFSET);
+ data = __raw_readl(port->membase + IO_DATA_REG_OFFSET);
if (MUX_STATUS(data))
continue;
if (MUX_EOFIFO(data))
break;
- if (tty->flip.count >= TTY_FLIPBUF_SIZE)
- continue;
-
- *tty->flip.char_buf_ptr = data & 0xffu;
- *tty->flip.flag_buf_ptr = TTY_NORMAL;
port->icount.rx++;
if (MUX_BREAK(data)) {
if (uart_handle_sysrq_char(port, data & 0xffu, NULL))
continue;
- tty->flip.flag_buf_ptr++;
- tty->flip.char_buf_ptr++;
- tty->flip.count++;
+ tty_insert_flip_char(tty, data & 0xFF, TTY_NORMAL);
}
if (start_count != port->icount.rx) {
port->iobase = 0;
port->mapbase = dev->hpa.start + MUX_OFFSET +
(i * MUX_LINE_OFFSET);
- port->membase = ioremap(port->mapbase, MUX_LINE_OFFSET);
- port->iotype = SERIAL_IO_MEM;
+ port->membase = ioremap_nocache(port->mapbase, MUX_LINE_OFFSET);
+ port->iotype = UPIO_MEM;
port->type = PORT_MUX;
port->irq = NO_IRQ;
port->uartclk = 0;
port->ops = &mux_pops;
port->flags = UPF_BOOT_AUTOCONF;
port->line = port_cnt;
+
+ /* The port->timeout needs to match what is present in
+ * uart_wait_until_sent in serial_core.c. Otherwise
+ * the time spent in msleep_interruptable will be very
+ * long, causing the appearance of a console hang.
+ */
+ port->timeout = HZ / 50;
spin_lock_init(&port->lock);
status = uart_add_one_port(&mux_driver, port);
BUG_ON(status);