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Commit 3ffb1a81 authored by Kevin Cernekee's avatar Kevin Cernekee Committed by Greg Kroah-Hartman
Browse files

serial: core: Add big-endian iotype 



Since most drivers interpret UPIO_MEM32 to mean "little-endian" and use
readl/writel to access the registers, add a parallel UPIO_MEM32BE to
request the use of big-endian MMIO accessors (ioread32be/iowrite32be).

Signed-off-by: default avatarKevin Cernekee <cernekee@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 57850a50

drivers/tty/serial/serial_core.c

+2 −0
Original line number Diff line number Diff line
@@ -2153,6 +2153,7 @@ uart_report_port(struct uart_driver *drv, struct uart_port *port) 
		break;

	case UPIO_MEM:

	case UPIO_MEM32:

	case UPIO_MEM32BE:

	case UPIO_AU:

	case UPIO_TSI:

		snprintf(address, sizeof(address),
@@ -2796,6 +2797,7 @@ int uart_match_port(struct uart_port *port1, struct uart_port *port2) 
		       (port1->hub6   == port2->hub6);

	case UPIO_MEM:

	case UPIO_MEM32:

	case UPIO_MEM32BE:

	case UPIO_AU:

	case UPIO_TSI:

		return (port1->mapbase == port2->mapbase);

include/linux/serial_core.h

+7 −6
Original line number Diff line number Diff line
@@ -142,12 +142,13 @@ struct uart_port { 
	unsigned char		iotype;			/* io access style */

	unsigned char		unused1;



#define UPIO_PORT		(0)

#define UPIO_HUB6		(1)

#define UPIO_MEM		(2)

#define UPIO_MEM32		(3)

#define UPIO_AU			(4)			/* Au1x00 and RT288x type IO */

#define UPIO_TSI		(5)			/* Tsi108/109 type IO */

#define UPIO_PORT		(0)			/* 8b I/O port access */

#define UPIO_HUB6		(1)			/* Hub6 ISA card */

#define UPIO_MEM		(2)			/* 8b MMIO access */

#define UPIO_MEM32		(3)			/* 32b little endian */

#define UPIO_MEM32BE		(4)			/* 32b big endian */

#define UPIO_AU			(5)			/* Au1x00 and RT288x type IO */

#define UPIO_TSI		(6)			/* Tsi108/109 type IO */



	unsigned int		read_status_mask;	/* driver specific */

	unsigned int		ignore_status_mask;	/* driver specific */