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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>
This commit is contained in:
Kevin Cernekee 2015-04-09 13:05:17 -07:00 committed by Rob Herring
parent 65a71007a2
commit c627f2ceb6
2 changed files with 25 additions and 0 deletions
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20
drivers/tty/serial/8250/8250_core.c
View File

@ -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;

5
drivers/tty/serial/8250/8250_early.c
View File

@ -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;