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authorKevin Cernekee <cernekee@gmail.com>2015-04-09 23:05:17 +0300
committerRob Herring <robh@kernel.org>2015-04-15 03:35:45 +0300
commitc627f2ceb692e8a9358b64ac2d139314e7bb0d17 (patch)
tree948fa9e378ab5216d5115a68c18939cf4b4e46a1 /drivers/tty
parent65a71007a20cfe7ebd456d72c0bb155fe42de963 (diff)
downloadlinux-c627f2ceb692e8a9358b64ac2d139314e7bb0d17.tar.xz
serial: 8250: Add support for big-endian MMIO accesses
Add cases for UPIO_MEM32BE wherever there are currently cases handling UPIO_MEM32. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/serial/8250/8250_core.c20
-rw-r--r--drivers/tty/serial/8250/8250_early.c5
2 files changed, 25 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index deae122c9c4b..0bffa735eaa1 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -439,6 +439,18 @@ static unsigned int mem32_serial_in(struct uart_port *p, int offset)
return readl(p->membase + offset);
}
+static void mem32be_serial_out(struct uart_port *p, int offset, int value)
+{
+ offset = offset << p->regshift;
+ iowrite32be(value, p->membase + offset);
+}
+
+static unsigned int mem32be_serial_in(struct uart_port *p, int offset)
+{
+ offset = offset << p->regshift;
+ return ioread32be(p->membase + offset);
+}
+
static unsigned int io_serial_in(struct uart_port *p, int offset)
{
offset = offset << p->regshift;
@@ -477,6 +489,11 @@ static void set_io_from_upio(struct uart_port *p)
p->serial_out = mem32_serial_out;
break;
+ case UPIO_MEM32BE:
+ p->serial_in = mem32be_serial_in;
+ p->serial_out = mem32be_serial_out;
+ break;
+
#if defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_SERIAL_8250_RT288X)
case UPIO_AU:
p->serial_in = au_serial_in;
@@ -502,6 +519,7 @@ serial_port_out_sync(struct uart_port *p, int offset, int value)
switch (p->iotype) {
case UPIO_MEM:
case UPIO_MEM32:
+ case UPIO_MEM32BE:
case UPIO_AU:
p->serial_out(p, offset, value);
p->serial_in(p, UART_LCR); /* safe, no side-effects */
@@ -2743,6 +2761,7 @@ static int serial8250_request_std_resource(struct uart_8250_port *up)
case UPIO_AU:
case UPIO_TSI:
case UPIO_MEM32:
+ case UPIO_MEM32BE:
case UPIO_MEM:
if (!port->mapbase)
break;
@@ -2779,6 +2798,7 @@ static void serial8250_release_std_resource(struct uart_8250_port *up)
case UPIO_AU:
case UPIO_TSI:
case UPIO_MEM32:
+ case UPIO_MEM32BE:
case UPIO_MEM:
if (!port->mapbase)
break;
diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index c31a22b4f845..84f6d11bbeed 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -45,6 +45,8 @@ unsigned int __weak __init serial8250_early_in(struct uart_port *port, int offse
return readb(port->membase + offset);
case UPIO_MEM32:
return readl(port->membase + (offset << 2));
+ case UPIO_MEM32BE:
+ return ioread32be(port->membase + (offset << 2));
case UPIO_PORT:
return inb(port->iobase + offset);
default:
@@ -61,6 +63,9 @@ void __weak __init serial8250_early_out(struct uart_port *port, int offset, int
case UPIO_MEM32:
writel(value, port->membase + (offset << 2));
break;
+ case UPIO_MEM32BE:
+ iowrite32be(value, port->membase + (offset << 2));
+ break;
case UPIO_PORT:
outb(value, port->iobase + offset);
break;