[PATCH V3 7/7] serial: 8250: Add support for big-endian MMIO accesses
From: Kevin Cernekee <cernekee@gmail.com>
Date: 2014-11-24 23:36:22
Also in:
linux-mips, linux-serial
Subsystem:
8250/16?50 (and clone uarts) serial driver, the rest, tty layer and serial drivers · Maintainers:
Greg Kroah-Hartman, Linus Torvalds, Jiri Slaby
Add cases for UPIO_MEM32BE wherever there are currently cases handling UPIO_MEM32. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> --- drivers/tty/serial/8250/8250_core.c | 20 ++++++++++++++++++++ drivers/tty/serial/8250/8250_early.c | 5 +++++ 2 files changed, 25 insertions(+)
diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index ca5cfdc..53982f0 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c@@ -428,6 +428,18 @@ 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;
@@ -466,6 +478,11 @@ 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;
@@ -491,6 +508,7 @@ 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 */
@@ -2655,6 +2673,7 @@ 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;
@@ -2691,6 +2710,7 @@ 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 4858b8a..33a0fb6 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;
--
2.1.0