diff options
| author | Noam Camus <noamc@ezchip.com> | 2015-12-12 19:18:26 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-02-06 22:28:23 -0800 |
| commit | 4625090187768bc776d69dfaa6a1f79b1125debe (patch) | |
| tree | 9f2ac0fef6fb8b2bc52269e124808aa74e52f8ca /drivers/tty | |
| parent | cdcea058e51008479545f29201b4fa577c59733c (diff) | |
serial: 8250_dw: Add support for big-endian MMIO accesses
Add support for UPIO_MEM32BE in addition to UPIO_MEM32.
For big endian we use 2 new accessors similar to little endian,
called dw8250_serial_out32be() and dw8250_serial_in32be().
Signed-off-by: Noam Camus <noamc@ezchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/8250/8250_dw.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c index ffe5e0cb1f05..92c4a9bc2e6d 100644 --- a/drivers/tty/serial/8250/8250_dw.c +++ b/drivers/tty/serial/8250/8250_dw.c @@ -182,6 +182,24 @@ static unsigned int dw8250_serial_in32(struct uart_port *p, int offset) return dw8250_modify_msr(p, offset, value); } +static void dw8250_serial_out32be(struct uart_port *p, int offset, int value) +{ + struct dw8250_data *d = p->private_data; + + iowrite32be(value, p->membase + (offset << p->regshift)); + + if (offset == UART_LCR && !d->uart_16550_compatible) + dw8250_check_lcr(p, value); +} + +static unsigned int dw8250_serial_in32be(struct uart_port *p, int offset) +{ + unsigned int value = ioread32be(p->membase + (offset << p->regshift)); + + return dw8250_modify_msr(p, offset, value); +} + + static int dw8250_handle_irq(struct uart_port *p) { struct dw8250_data *d = p->private_data; @@ -276,6 +294,11 @@ static void dw8250_quirks(struct uart_port *p, struct dw8250_data *data) data->skip_autocfg = true; } #endif + if (of_device_is_big_endian(p->dev->of_node)) { + p->iotype = UPIO_MEM32BE; + p->serial_in = dw8250_serial_in32be; + p->serial_out = dw8250_serial_out32be; + } } else if (has_acpi_companion(p->dev)) { p->iotype = UPIO_MEM32; p->regshift = 2; |