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Commit 2d952b4b authored by Magnus Damm's avatar Magnus Damm Committed by Paul Mundt
Browse files

sh: trapped io support for r2d V2 



This patch converts the CF device on r2d boards from machvec readb/writeb
to trapped io.

Signed-off-by: default avatarMagnus Damm <damm@igel.co.jp>
Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
parent e7cc9a73

arch/sh/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -459,6 +459,7 @@ config SH_RTS7751R2D 
	bool "RTS7751R2D"

	depends on CPU_SUBTYPE_SH7751R

	select SYS_SUPPORTS_PCI

	select IO_TRAPPED

	help

	  Select RTS7751R2D if configuring for a Renesas Technology

	  Sales SH-Graphics board.

arch/sh/boards/renesas/rts7751r2d/setup.c

+14 −31
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <asm/machvec.h>

#include <asm/rts7751r2d.h>

#include <asm/io.h>

#include <asm/io_trapped.h>

#include <asm/spi.h>



static struct resource cf_ide_resources[] = {
@@ -214,13 +215,25 @@ static struct platform_device *rts7751r2d_devices[] __initdata = { 
	&uart_device,

	&sm501_device,

#endif

	&cf_ide_device,

	&heartbeat_device,

	&spi_sh_sci_device,

};



/*

 * The CF is connected with a 16-bit bus where 8-bit operations are

 * unsupported. The linux ata driver is however using 8-bit operations, so

 * insert a trapped io filter to convert 8-bit operations into 16-bit.

 */

static struct trapped_io cf_trapped_io = {

	.resource		= cf_ide_resources,

	.num_resources		= 2,

	.minimum_bus_width	= 16,

};



static int __init rts7751r2d_devices_setup(void)

{

	if (register_trapped_io(&cf_trapped_io) == 0)

		platform_device_register(&cf_ide_device);

	spi_register_board_info(spi_bus, ARRAY_SIZE(spi_bus));

	return platform_add_devices(rts7751r2d_devices,

				    ARRAY_SIZE(rts7751r2d_devices));
@@ -232,34 +245,6 @@ static void rts7751r2d_power_off(void) 
	ctrl_outw(0x0001, PA_POWOFF);

}



static inline unsigned char is_ide_ioaddr(unsigned long addr)

{

	return ((cf_ide_resources[0].start <= addr &&

		 addr <= cf_ide_resources[0].end) ||

		(cf_ide_resources[1].start <= addr &&

		 addr <= cf_ide_resources[1].end));

}



void rts7751r2d_writeb(u8 b, void __iomem *addr)

{

	unsigned long tmp = (unsigned long __force)addr;



	if (is_ide_ioaddr(tmp))

		ctrl_outw((u16)b, tmp);

	else

		ctrl_outb(b, tmp);

}



u8 rts7751r2d_readb(void __iomem *addr)

{

	unsigned long tmp = (unsigned long __force)addr;



	if (is_ide_ioaddr(tmp))

		return ctrl_inw(tmp) & 0xff;

	else

		return ctrl_inb(tmp);

}



/*

 * Initialize the board

 */
@@ -310,6 +295,4 @@ static struct sh_machine_vector mv_rts7751r2d __initmv = { 
	.mv_setup		= rts7751r2d_setup,

	.mv_init_irq		= init_rts7751r2d_IRQ,

	.mv_irq_demux		= rts7751r2d_irq_demux,

	.mv_writeb		= rts7751r2d_writeb,

	.mv_readb		= rts7751r2d_readb,

};

include/asm-sh/rts7751r2d.h

+0 −3
Original line number Diff line number Diff line
@@ -67,7 +67,4 @@ 
void init_rts7751r2d_IRQ(void);

int rts7751r2d_irq_demux(int);



#define __IO_PREFIX rts7751r2d

#include <asm/io_generic.h>



#endif  /* __ASM_SH_RENESAS_RTS7751R2D */