[ARM] pxa/zeus: make Viper pcmcia support more generic to support Zeus

The Arcom Zeus CF slot requires the same kind of support as the Viper.
To avoid code duplication, introduce a platform device that abstracts
the differences.

This also allows for the removal of the ugly export of viper_cf_rst().

Signed-off-by: Marc Zyngier <maz@misterjones.org>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>

5 files changed, 65 insertions, 4 deletions

diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index fc553e896b1..e6d8e10ae5d 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -63,6 +63,7 @@ config ARCH_VIPER
 	select HAVE_PWM
 	select PXA_HAVE_BOARD_IRQS
 	select PXA_HAVE_ISA_IRQS
+	select ARCOM_PCMCIA
 
 config MACH_ARCOM_ZEUS
 	bool "Arcom/Eurotech ZEUS SBC"
@@ -70,6 +71,7 @@ config MACH_ARCOM_ZEUS
 	select ISA
 	select PXA_HAVE_BOARD_IRQS
 	select PXA_HAVE_ISA_IRQS
+	select ARCOM_PCMCIA
 
 config MACH_BALLOON3
 	bool "Balloon 3 board"
@@ -186,6 +188,11 @@ config MACH_TRIZEPS_ANY
 
 endchoice
 
+config ARCOM_PCMCIA
+	bool
+	help
+	  Generic option for Arcom Viper/Zeus PCMCIA
+
 config TRIZEPS_PCMCIA
 	bool
 	help
diff --git a/arch/arm/mach-pxa/include/mach/arcom-pcmcia.h b/arch/arm/mach-pxa/include/mach/arcom-pcmcia.h
new file mode 100644
index 00000000000..d428be4db44
--- /dev/null
+++ b/arch/arm/mach-pxa/include/mach/arcom-pcmcia.h
@@ -0,0 +1,11 @@
+#ifndef __ARCOM_PCMCIA_H
+#define __ARCOM_PCMCIA_H
+
+struct arcom_pcmcia_pdata {
+	int	cd_gpio;
+	int	rdy_gpio;
+	int	pwr_gpio;
+	void	(*reset)(int state);
+};
+
+#endif
diff --git a/arch/arm/mach-pxa/include/mach/viper.h b/arch/arm/mach-pxa/include/mach/viper.h
index 10988c270ca..5f5fbf1f648 100644
--- a/arch/arm/mach-pxa/include/mach/viper.h
+++ b/arch/arm/mach-pxa/include/mach/viper.h
@@ -85,8 +85,6 @@
 /* Interrupt and Configuration Register (VIPER_ICR) */
 /* This is a write only register. Only CF_RST is used under Linux */
 
-extern void viper_cf_rst(int state);
-
 #define VIPER_ICR_RETRIG	(1 << 0)
 #define VIPER_ICR_AUTO_CLR	(1 << 1)
 #define VIPER_ICR_R_DIS		(1 << 2)
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
index cf0d71b7797..5352b4e5a7d 100644
--- a/arch/arm/mach-pxa/viper.c
+++ b/arch/arm/mach-pxa/viper.c
@@ -47,6 +47,7 @@
 #include <mach/pxafb.h>
 #include <plat/i2c.h>
 #include <mach/regs-uart.h>
+#include <mach/arcom-pcmcia.h>
 #include <mach/viper.h>
 
 #include <asm/setup.h>
@@ -76,14 +77,28 @@ static void viper_icr_clear_bit(unsigned int bit)
 }
 
 /* This function is used from the pcmcia module to reset the CF */
-void viper_cf_rst(int state)
+static void viper_cf_reset(int state)
 {
 	if (state)
 		viper_icr_set_bit(VIPER_ICR_CF_RST);
 	else
 		viper_icr_clear_bit(VIPER_ICR_CF_RST);
 }
-EXPORT_SYMBOL(viper_cf_rst);
+
+static struct arcom_pcmcia_pdata viper_pcmcia_info = {
+	.cd_gpio	= VIPER_CF_CD_GPIO,
+	.rdy_gpio	= VIPER_CF_RDY_GPIO,
+	.pwr_gpio	= VIPER_CF_POWER_GPIO,
+	.reset		= viper_cf_reset,
+};
+
+static struct platform_device viper_pcmcia_device = {
+	.name		= "viper-pcmcia",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &viper_pcmcia_info,
+	},
+};
 
 /*
  * The CPLD version register was not present on VIPER boards prior to
@@ -685,6 +700,7 @@ static struct platform_device *viper_devs[] __initdata = {
 	&viper_mtd_devices[0],
 	&viper_mtd_devices[1],
 	&viper_backlight_device,
+	&viper_pcmcia_device,
 };
 
 static mfp_cfg_t viper_pin_config[] __initdata = {
diff --git a/arch/arm/mach-pxa/zeus.c b/arch/arm/mach-pxa/zeus.c
index ae1c3d2f6d5..5b986a8bd9e 100644
--- a/arch/arm/mach-pxa/zeus.c
+++ b/arch/arm/mach-pxa/zeus.c
@@ -43,6 +43,7 @@
 #include <mach/mfp-pxa27x.h>
 #include <mach/pm.h>
 #include <mach/audio.h>
+#include <mach/arcom-pcmcia.h>
 #include <mach/zeus.h>
 
 #include "generic.h"
@@ -428,6 +429,33 @@ static struct platform_device zeus_leds_device = {
 	},
 };
 
+static void zeus_cf_reset(int state)
+{
+	u16 cpld_state = __raw_readw(ZEUS_CPLD_CONTROL);
+
+	if (state)
+		cpld_state |= ZEUS_CPLD_CONTROL_CF_RST;
+	else
+		cpld_state &= ~ZEUS_CPLD_CONTROL_CF_RST;
+
+	__raw_writew(cpld_state, ZEUS_CPLD_CONTROL);
+}
+
+static struct arcom_pcmcia_pdata zeus_pcmcia_info = {
+	.cd_gpio	= ZEUS_CF_CD_GPIO,
+	.rdy_gpio	= ZEUS_CF_RDY_GPIO,
+	.pwr_gpio	= ZEUS_CF_PWEN_GPIO,
+	.reset		= zeus_cf_reset,
+};
+
+static struct platform_device zeus_pcmcia_device = {
+	.name		= "zeus-pcmcia",
+	.id		= -1,
+	.dev		= {
+		.platform_data	= &zeus_pcmcia_info,
+	},
+};
+
 static struct platform_device *zeus_devices[] __initdata = {
 	&zeus_serial_device,
 	&zeus_mtd_devices[0],
@@ -436,6 +464,7 @@ static struct platform_device *zeus_devices[] __initdata = {
 	&zeus_sram_device,
 	&pxa2xx_spi_ssp3_device,
 	&zeus_leds_device,
+	&zeus_pcmcia_device,
 };
 
 /* AC'97 */