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Commit e077b50c authored by Grant Likely's avatar Grant Likely Committed by Josh Boyer
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[POWERPC] Uartlite: Revert register io access changes 



Reverts commit a15da8ef

This driver is used by devices other than the xilinx opb-uartlite which
depend on bytewise access to the registers.  The change to 32 bit access
does not work on these devices.

Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarPeter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: default avatarJosh Boyer <jwboyer@linux.vnet.ibm.com>
parent be1b4d34

arch/ppc/syslib/virtex_devices.c

+1 −1
Original line number Diff line number Diff line
@@ -28,7 +28,7 @@ 
	.num_resources = 2, \

	.resource = (struct resource[]) { \

		{ \

			.start = XPAR_UARTLITE_##num##_BASEADDR, \

			.start = XPAR_UARTLITE_##num##_BASEADDR + 3, \

			.end = XPAR_UARTLITE_##num##_HIGHADDR, \

			.flags = IORESOURCE_MEM, \

		}, \

drivers/serial/uartlite.c

+18 −18
Original line number Diff line number Diff line
@@ -75,7 +75,7 @@ static int ulite_receive(struct uart_port *port, int stat) 
	/* stats */

	if (stat & ULITE_STATUS_RXVALID) {

		port->icount.rx++;

		ch = in_be32((void*)port->membase + ULITE_RX);

		ch = readb(port->membase + ULITE_RX);



		if (stat & ULITE_STATUS_PARITY)

			port->icount.parity++;
@@ -120,7 +120,7 @@ static int ulite_transmit(struct uart_port *port, int stat) 
		return 0;



	if (port->x_char) {

		out_be32((void*)port->membase + ULITE_TX, port->x_char);

		writeb(port->x_char, port->membase + ULITE_TX);

		port->x_char = 0;

		port->icount.tx++;

		return 1;
@@ -129,7 +129,7 @@ static int ulite_transmit(struct uart_port *port, int stat) 
	if (uart_circ_empty(xmit) || uart_tx_stopped(port))

		return 0;



	out_be32((void*)port->membase + ULITE_TX, xmit->buf[xmit->tail]);

	writeb(xmit->buf[xmit->tail], port->membase + ULITE_TX);

	xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE-1);

	port->icount.tx++;
@@ -146,7 +146,7 @@ static irqreturn_t ulite_isr(int irq, void *dev_id) 
	int busy;



	do {

		int stat = in_be32((void*)port->membase + ULITE_STATUS);

		int stat = readb(port->membase + ULITE_STATUS);

		busy  = ulite_receive(port, stat);

		busy |= ulite_transmit(port, stat);

	} while (busy);
@@ -162,7 +162,7 @@ static unsigned int ulite_tx_empty(struct uart_port *port) 
	unsigned int ret;



	spin_lock_irqsave(&port->lock, flags);

	ret = in_be32((void*)port->membase + ULITE_STATUS);

	ret = readb(port->membase + ULITE_STATUS);

	spin_unlock_irqrestore(&port->lock, flags);



	return ret & ULITE_STATUS_TXEMPTY ? TIOCSER_TEMT : 0;
@@ -185,7 +185,7 @@ static void ulite_stop_tx(struct uart_port *port) 


static void ulite_start_tx(struct uart_port *port)

{

	ulite_transmit(port, in_be32((void*)port->membase + ULITE_STATUS));

	ulite_transmit(port, readb(port->membase + ULITE_STATUS));

}



static void ulite_stop_rx(struct uart_port *port)
@@ -214,17 +214,17 @@ static int ulite_startup(struct uart_port *port) 
	if (ret)

		return ret;



	out_be32((void*)port->membase + ULITE_CONTROL,

	         ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX);

	out_be32((void*)port->membase + ULITE_CONTROL, ULITE_CONTROL_IE);

	writeb(ULITE_CONTROL_RST_RX | ULITE_CONTROL_RST_TX,

	       port->membase + ULITE_CONTROL);

	writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);



	return 0;

}



static void ulite_shutdown(struct uart_port *port)

{

	out_be32((void*)port->membase + ULITE_CONTROL, 0);

	in_be32((void*)port->membase + ULITE_CONTROL); /* dummy */

	writeb(0, port->membase + ULITE_CONTROL);

	readb(port->membase + ULITE_CONTROL); /* dummy */

	free_irq(port->irq, port);

}
@@ -332,7 +332,7 @@ static void ulite_console_wait_tx(struct uart_port *port) 


	/* wait up to 10ms for the character(s) to be sent */

	for (i = 0; i < 10000; i++) {

		if (in_be32((void*)port->membase + ULITE_STATUS) & ULITE_STATUS_TXEMPTY)

		if (readb(port->membase + ULITE_STATUS) & ULITE_STATUS_TXEMPTY)

			break;

		udelay(1);

	}
@@ -341,7 +341,7 @@ static void ulite_console_wait_tx(struct uart_port *port) 
static void ulite_console_putchar(struct uart_port *port, int ch)

{

	ulite_console_wait_tx(port);

	out_be32((void*)port->membase + ULITE_TX, ch);

	writeb(ch, port->membase + ULITE_TX);

}



static void ulite_console_write(struct console *co, const char *s,
@@ -358,8 +358,8 @@ static void ulite_console_write(struct console *co, const char *s, 
		spin_lock_irqsave(&port->lock, flags);



	/* save and disable interrupt */

	ier = in_be32((void*)port->membase + ULITE_STATUS) & ULITE_STATUS_IE;

	out_be32((void*)port->membase + ULITE_CONTROL, 0);

	ier = readb(port->membase + ULITE_STATUS) & ULITE_STATUS_IE;

	writeb(0, port->membase + ULITE_CONTROL);



	uart_console_write(port, s, count, ulite_console_putchar);
@@ -367,7 +367,7 @@ static void ulite_console_write(struct console *co, const char *s, 


	/* restore interrupt state */

	if (ier)

		out_be32((void*)port->membase + ULITE_CONTROL, ULITE_CONTROL_IE);

		writeb(ULITE_CONTROL_IE, port->membase + ULITE_CONTROL);



	if (locked)

		spin_unlock_irqrestore(&port->lock, flags);
@@ -598,7 +598,7 @@ ulite_of_probe(struct of_device *op, const struct of_device_id *match) 


	rc = of_address_to_resource(op->node, 0, &res);

	if (rc) {

		dev_err(&op->dev, "invalide address\n");

		dev_err(&op->dev, "invalid address\n");

		return rc;

	}
@@ -606,7 +606,7 @@ ulite_of_probe(struct of_device *op, const struct of_device_id *match) 


	id = of_get_property(op->node, "port-number", NULL);



	return ulite_assign(&op->dev, id ? *id : -1, res.start, irq);

	return ulite_assign(&op->dev, id ? *id : -1, res.start+3, irq);

}



static int __devexit ulite_of_remove(struct of_device *op)