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authorMagnus Damm <magnus.damm@gmail.com>2008-02-07 20:21:10 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-02-14 14:22:09 +0900
commit2d952b4b8c94ed8576b4221dad9654c5d98275d0 (patch)
tree5da9ac33e72153617cec9dcbb0e0cb4707782108 /arch
parente7cc9a7340b8ec018caa9eb1d035fdaef1f2fc51 (diff)
downloadop-kernel-dev-2d952b4b8c94ed8576b4221dad9654c5d98275d0.zip
op-kernel-dev-2d952b4b8c94ed8576b4221dad9654c5d98275d0.tar.gz
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: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/Kconfig1
-rw-r--r--arch/sh/boards/renesas/rts7751r2d/setup.c45
2 files changed, 15 insertions, 31 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index f61bf17..0d288fe 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -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.
diff --git a/arch/sh/boards/renesas/rts7751r2d/setup.c b/arch/sh/boards/renesas/rts7751r2d/setup.c
index a0ef81b..f21ee49 100644
--- a/arch/sh/boards/renesas/rts7751r2d/setup.c
+++ b/arch/sh/boards/renesas/rts7751r2d/setup.c
@@ -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,
};
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