serial: uartlite: move from byte accesses to word accesses
Byte accesses for I/O devices in Xilinx IP is going to be less
desired in the future such that the driver is being changed to
use 32 bit accesses.
This change facilitates using the uartlite IP over a PCIe bus
which only allows 32 bit accesses.
Signed-off-by: John Linn <john.linn@xilinx.com>
Tested-by: Michal Simek <monstr@monstr.eu>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/serial/uartlite.c b/drivers/serial/uartlite.c
index f0a6c61..e6639a9 100644
--- a/drivers/serial/uartlite.c
+++ b/drivers/serial/uartlite.c
@@ -86,7 +86,7 @@
/* stats */
if (stat & ULITE_STATUS_RXVALID) {
port->icount.rx++;
- ch = readb(port->membase + ULITE_RX);
+ ch = ioread32be(port->membase + ULITE_RX);
if (stat & ULITE_STATUS_PARITY)
port->icount.parity++;
@@ -131,7 +131,7 @@
return 0;
if (port->x_char) {
- writeb(port->x_char, port->membase + ULITE_TX);
+ iowrite32be(port->x_char, port->membase + ULITE_TX);
port->x_char = 0;
port->icount.tx++;
return 1;
@@ -140,7 +140,7 @@
if (uart_circ_empty(xmit) || uart_tx_stopped(port))
return 0;
- writeb(xmit->buf[xmit->tail], port->membase + ULITE_TX);
+ iowrite32be(xmit->buf[xmit->tail], port->membase + ULITE_TX);
xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);
port->icount.tx++;
@@ -157,7 +157,7 @@
int busy, n = 0;
do {
- int stat = readb(port->membase + ULITE_STATUS);
+ int stat = ioread32be(port->membase + ULITE_STATUS);
busy = ulite_receive(port, stat);
busy |= ulite_transmit(port, stat);
n++;
@@ -178,7 +178,7 @@
unsigned int ret;
spin_lock_irqsave(&port->lock, flags);
- ret = readb(port->membase + ULITE_STATUS);
+ ret = ioread32be(port->membase + ULITE_STATUS);
spin_unlock_irqrestore(&port->lock, flags);
return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
@@ -201,7 +201,7 @@
static void ulite_start_tx(struct uart_port *port)
{
- ulite_transmit(port, readb(port->membase + ULITE_STATUS));
+ ulite_transmit(port, ioread32be(port->membase + ULITE_STATUS));
}
static void ulite_stop_rx(struct uart_port *port)
@@ -230,17 +230,17 @@
if (ret)
return ret;
- writeb(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX,
+ iowrite32be(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX,
port->membase + ULITE_CONTROL);
- writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
+ iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
return 0;
}
static void ulite_shutdown(struct uart_port *port)
{
- writeb(0, port->membase + ULITE_CONTROL);
- readb(port->membase + ULITE_CONTROL); /* dummy */
+ iowrite32be(0, port->membase + ULITE_CONTROL);
+ ioread32be(port->membase + ULITE_CONTROL); /* dummy */
free_irq(port->irq, port);
}
@@ -352,7 +352,7 @@
/* Spin waiting for TX fifo to have space available */
for (i = 0; i < 100000; i++) {
- val = readb(port->membase + ULITE_STATUS);
+ val = ioread32be(port->membase + ULITE_STATUS);
if ((val & ULITE_STATUS_TXFULL) == 0)
break;
cpu_relax();
@@ -362,7 +362,7 @@
static void ulite_console_putchar(struct uart_port *port, int ch)
{
ulite_console_wait_tx(port);
- writeb(ch, port->membase + ULITE_TX);
+ iowrite32be(ch, port->membase + ULITE_TX);
}
static void ulite_console_write(struct console *co, const char *s,
@@ -379,8 +379,8 @@
spin_lock_irqsave(&port->lock, flags);
/* save and disable interrupt */
- ier = readb(port->membase + ULITE_STATUS) & ULITE_STATUS_IE;
- writeb(0, port->membase + ULITE_CONTROL);
+ ier = ioread32be(port->membase + ULITE_STATUS) & ULITE_STATUS_IE;
+ iowrite32be(0, port->membase + ULITE_CONTROL);
uart_console_write(port, s, count, ulite_console_putchar);
@@ -388,7 +388,7 @@
/* restore interrupt state */
if (ier)
- writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
+ iowrite32be(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);
if (locked)
spin_unlock_irqrestore(&port->lock, flags);
@@ -601,7 +601,7 @@
id = of_get_property(op->node, "port-number", NULL);
- return ulite_assign(&op->dev, id ? *id : -1, res.start+3, irq);
+ return ulite_assign(&op->dev, id ? *id : -1, res.start, irq);
}
static int __devexit ulite_of_remove(struct of_device *op)