[ARM] 2897/2: PXA2xx IRDA support

Patch from Nicolas Pitre

This is the PXA2xx common IRDA driver, plus platform support
for Lubbock and Mainstone.
Signed-off-by: Nicolas Pitre <nico@cam.org>
Acked-by: Jean Tourrilhes <jt@hpl.hp.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/generic.c

@@ -34,6 +34,7 @@
 #include <asm/arch/udc.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/irda.h>
 #include <asm/arch/i2c.h>
 
 #include "generic.h"
@@ -301,6 +302,22 @@ static struct platform_device i2s_device = {
 	.num_resources	= ARRAY_SIZE(i2s_resources),
 };
 
+static u64 pxaficp_dmamask = ~(u32)0;
+
+static struct platform_device pxaficp_device = {
+	.name		= "pxa2xx-ir",
+	.id		= -1,
+	.dev		= {
+		.dma_mask = &pxaficp_dmamask,
+		.coherent_dma_mask = 0xffffffff,
+	},
+};
+
+void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
+{
+	pxaficp_device.dev.platform_data = info;
+}
+
 static struct platform_device *devices[] __initdata = {
 	&pxamci_device,
 	&udc_device,
@@ -308,6 +325,7 @@ static struct platform_device *devices[] __initdata = {
 	&ffuart_device,
 	&btuart_device,
 	&stuart_device,
+	&pxaficp_device,
 	&i2c_device,
 	&i2s_device,
 };

arch/arm/mach-pxa/lubbock.c

@@ -35,6 +35,7 @@
 #include <asm/arch/pxa-regs.h>
 #include <asm/arch/lubbock.h>
 #include <asm/arch/udc.h>
+#include <asm/arch/irda.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
 
@@ -237,11 +238,30 @@ static struct pxamci_platform_data lubbock_mci_platform_data = {
 	.init 		= lubbock_mci_init,
 };
 
+static void lubbock_irda_transceiver_mode(struct device *dev, int mode)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	if (mode & IR_SIRMODE) {
+		LUB_MISC_WR &= ~(1 << 4);
+	} else if (mode & IR_FIRMODE) {
+		LUB_MISC_WR |= 1 << 4;
+	}
+	local_irq_restore(flags);
+}
+
+static struct pxaficp_platform_data lubbock_ficp_platform_data = {
+	.transceiver_cap  = IR_SIRMODE | IR_FIRMODE,
+	.transceiver_mode = lubbock_irda_transceiver_mode,
+};
+
 static void __init lubbock_init(void)
 {
 	pxa_set_udc_info(&udc_info);
 	set_pxa_fb_info(&sharp_lm8v31);
 	pxa_set_mci_info(&lubbock_mci_platform_data);
+	pxa_set_ficp_info(&lubbock_ficp_platform_data);
 	(void) platform_add_devices(devices, ARRAY_SIZE(devices));
 }
 

arch/arm/mach-pxa/mainstone.c

@@ -37,6 +37,7 @@
 #include <asm/arch/audio.h>
 #include <asm/arch/pxafb.h>
 #include <asm/arch/mmc.h>
+#include <asm/arch/irda.h>
 
 #include "generic.h"
 
@@ -294,6 +295,29 @@ static struct pxamci_platform_data mainstone_mci_platform_data = {
 	.exit		= mainstone_mci_exit,
 };
 
+static void mainstone_irda_transceiver_mode(struct device *dev, int mode)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+	if (mode & IR_SIRMODE) {
+		MST_MSCWR1 &= ~MST_MSCWR1_IRDA_FIR;
+	} else if (mode & IR_FIRMODE) {
+		MST_MSCWR1 |= MST_MSCWR1_IRDA_FIR;
+	}
+	if (mode & IR_OFF) {
+		MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_OFF;
+	} else {
+		MST_MSCWR1 = (MST_MSCWR1 & ~MST_MSCWR1_IRDA_MASK) | MST_MSCWR1_IRDA_FULL;
+	}
+	local_irq_restore(flags);
+}
+
+static struct pxaficp_platform_data mainstone_ficp_platform_data = {
+	.transceiver_cap  = IR_SIRMODE | IR_FIRMODE | IR_OFF,
+	.transceiver_mode = mainstone_irda_transceiver_mode,
+};
+
 static void __init mainstone_init(void)
 {
 	/*
@@ -313,6 +337,7 @@ static void __init mainstone_init(void)
 		set_pxa_fb_info(&toshiba_ltm035a776c);
 
 	pxa_set_mci_info(&mainstone_mci_platform_data);
+	pxa_set_ficp_info(&mainstone_ficp_platform_data);
 }
 
 

drivers/net/irda/Kconfig

@@ -400,5 +400,15 @@ config VIA_FIR
 	  To compile it as a module, choose M here: the module will be called
 	  via-ircc.
 
+config PXA_FICP
+	tristate "Intel PXA2xx Internal FICP"
+	depends on ARCH_PXA && IRDA
+	help
+	  Say Y or M here if you want to build support for the PXA2xx
+	  built-in IRDA interface which can support both SIR and FIR.
+	  This driver relies on platform specific helper routines so
+	  available capabilities may vary from one PXA2xx target to
+	  another.
+
 endmenu
 

drivers/net/irda/Makefile

@@ -18,6 +18,7 @@ obj-$(CONFIG_SMC_IRCC_FIR)	+= smsc-ircc2.o
 obj-$(CONFIG_ALI_FIR)		+= ali-ircc.o
 obj-$(CONFIG_VLSI_FIR)		+= vlsi_ir.o
 obj-$(CONFIG_VIA_FIR)		+= via-ircc.o
+obj-$(CONFIG_PXA_FICP)	        += pxaficp_ir.o
 # Old dongle drivers for old SIR drivers
 obj-$(CONFIG_ESI_DONGLE_OLD)		+= esi.o
 obj-$(CONFIG_TEKRAM_DONGLE_OLD)	+= tekram.o

include/asm-arm/arch-pxa/irda.h

+#ifndef ASMARM_ARCH_IRDA_H
+#define ASMARM_ARCH_IRDA_H
+
+/* board specific transceiver capabilities */
+
+#define IR_OFF		1
+#define IR_SIRMODE	2
+#define IR_FIRMODE	4
+
+struct pxaficp_platform_data {
+	int transceiver_cap;
+	void (*transceiver_mode)(struct device *dev, int mode);
+};
+
+extern void pxa_set_ficp_info(struct pxaficp_platform_data *info);
+
+#endif

include/asm-arm/arch-pxa/pxa-regs.h

@@ -1032,14 +1032,12 @@
 #define ICCR0_LBM	(1 << 1)	/* Loopback mode */
 #define ICCR0_ITR	(1 << 0)	/* IrDA transmission */
 
-#ifdef CONFIG_PXA27x
 #define ICCR2_RXP       (1 << 3)	/* Receive Pin Polarity select */
 #define ICCR2_TXP       (1 << 2)	/* Transmit Pin Polarity select */
 #define ICCR2_TRIG	(3 << 0)	/* Receive FIFO Trigger threshold */
 #define ICCR2_TRIG_8    (0 << 0)	/* 	>= 8 bytes */
 #define ICCR2_TRIG_16   (1 << 0)	/*	>= 16 bytes */
 #define ICCR2_TRIG_32   (2 << 0)	/*	>= 32 bytes */
-#endif
 
 #ifdef CONFIG_PXA27x
 #define ICSR0_EOC	(1 << 6)	/* DMA End of Descriptor Chain */