Davinci: DM365: Enable DaVinci Key Scan support for DM365 EVM

The general structures are defined at DM365 SoC file and the specific
platform data structure for the EVM is defined at board file.

Signed-off-by: Miguel Aguilar <miguel.aguilar@ridgerun.com>

4 files changed, 76 insertions, 3 deletions

diff --git a/arch/arm/mach-davinci/board-dm365-evm.c b/arch/arm/mach-davinci/board-dm365-evm.c
index 3d7b5bbeb97..19678dc91b0 100644
--- a/arch/arm/mach-davinci/board-dm365-evm.c
+++ b/arch/arm/mach-davinci/board-dm365-evm.c
@@ -23,6 +23,7 @@
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/partitions.h>
 #include <linux/mtd/nand.h>
+#include <linux/input.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -34,6 +35,7 @@
 #include <mach/serial.h>
 #include <mach/mmc.h>
 #include <mach/nand.h>
+#include <mach/keyscan.h>
 
 static inline int have_imager(void)
 {
@@ -190,6 +192,38 @@ static struct davinci_i2c_platform_data i2c_pdata = {
 	.bus_delay	= 0	/* usec */,
 };
 
+#ifdef CONFIG_KEYBOARD_DAVINCI
+static unsigned short dm365evm_keymap[] = {
+	KEY_KP2,
+	KEY_LEFT,
+	KEY_EXIT,
+	KEY_DOWN,
+	KEY_ENTER,
+	KEY_UP,
+	KEY_KP1,
+	KEY_RIGHT,
+	KEY_MENU,
+	KEY_RECORD,
+	KEY_REWIND,
+	KEY_KPMINUS,
+	KEY_STOP,
+	KEY_FASTFORWARD,
+	KEY_KPPLUS,
+	KEY_PLAYPAUSE,
+	0
+};
+
+static struct davinci_ks_platform_data dm365evm_ks_data = {
+	.keymap		= dm365evm_keymap,
+	.keymapsize	= ARRAY_SIZE(dm365evm_keymap),
+	.rep		= 1,
+	/* Scan period = strobe + interval */
+	.strobe		= 0x5,
+	.interval	= 0x2,
+	.matrix_type	= DAVINCI_KEYSCAN_MATRIX_4X4,
+};
+#endif
+
 static int cpld_mmc_get_cd(int module)
 {
 	if (!cpld)
@@ -476,6 +510,10 @@ static __init void dm365_evm_init(void)
 	evm_init_cpld();
 
 	dm365_init_asp(&dm365_evm_snd_data);
+
+#ifdef CONFIG_KEYBOARD_DAVINCI
+	dm365_init_ks(&dm365evm_ks_data);
+#endif
 }
 
 static __init void dm365_evm_irq_init(void)
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index 0fbc2f261ee..c12bb005b90 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -31,6 +31,7 @@
 #include <mach/serial.h>
 #include <mach/common.h>
 #include <mach/asp.h>
+#include <mach/keyscan.h>
 
 #include "clock.h"
 #include "mux.h"
@@ -530,7 +531,7 @@ MUX_CFG(DM365,  EMAC_CRS,	3,   2,     1,    1,     false)
 MUX_CFG(DM365,  EMAC_MDIO,	3,   1,     1,    1,     false)
 MUX_CFG(DM365,  EMAC_MDCLK,	3,   0,     1,    1,     false)
 
-MUX_CFG(DM365,	KEYPAD,		2,   0,     0x3f, 0x3f,  false)
+MUX_CFG(DM365,	KEYSCAN,	2,   0,     0x3f, 0x3f,  false)
 
 MUX_CFG(DM365,	PWM0,		1,   0,     3,    2,     false)
 MUX_CFG(DM365,	PWM0_G23,	3,   26,    3,    3,     false)
@@ -849,6 +850,28 @@ static struct map_desc dm365_io_desc[] = {
 	},
 };
 
+static struct resource dm365_ks_resources[] = {
+	{
+		/* registers */
+		.start = DM365_KEYSCAN_BASE,
+		.end = DM365_KEYSCAN_BASE + SZ_1K - 1,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		/* interrupt */
+		.start = IRQ_DM365_KEYINT,
+		.end = IRQ_DM365_KEYINT,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static struct platform_device dm365_ks_device = {
+	.name		= "davinci_keyscan",
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(dm365_ks_resources),
+	.resource	= dm365_ks_resources,
+};
+
 /* Contents of JTAG ID register used to identify exact cpu type */
 static struct davinci_id dm365_ids[] = {
 	{
@@ -948,6 +971,13 @@ void __init dm365_init_asp(struct snd_platform_data *pdata)
 	platform_device_register(&dm365_asp_device);
 }
 
+void __init dm365_init_ks(struct davinci_ks_platform_data *pdata)
+{
+	davinci_cfg_reg(DM365_KEYSCAN);
+	dm365_ks_device.dev.platform_data = pdata;
+	platform_device_register(&dm365_ks_device);
+}
+
 void __init dm365_init(void)
 {
 	davinci_common_init(&davinci_soc_info_dm365);
diff --git a/arch/arm/mach-davinci/include/mach/dm365.h b/arch/arm/mach-davinci/include/mach/dm365.h
index 2291c0d2c2a..d8d988a0b58 100644
--- a/arch/arm/mach-davinci/include/mach/dm365.h
+++ b/arch/arm/mach-davinci/include/mach/dm365.h
@@ -17,6 +17,7 @@
 #include <mach/hardware.h>
 #include <mach/emac.h>
 #include <mach/asp.h>
+#include <mach/keyscan.h>
 
 #define DM365_EMAC_BASE			(0x01D07000)
 #define DM365_EMAC_CNTRL_OFFSET		(0x0000)
@@ -25,7 +26,11 @@
 #define DM365_EMAC_MDIO_OFFSET		(0x4000)
 #define DM365_EMAC_CNTRL_RAM_SIZE	(0x2000)
 
+/* Base of key scan register bank */
+#define DM365_KEYSCAN_BASE		(0x01C69400)
+
 void __init dm365_init(void);
 void __init dm365_init_asp(struct snd_platform_data *pdata);
+void __init dm365_init_ks(struct davinci_ks_platform_data *pdata);
 
 #endif /* __ASM_ARCH_DM365_H */
diff --git a/arch/arm/mach-davinci/include/mach/mux.h b/arch/arm/mach-davinci/include/mach/mux.h
index 16b8a7fc39b..d41ad16966b 100644
--- a/arch/arm/mach-davinci/include/mach/mux.h
+++ b/arch/arm/mach-davinci/include/mach/mux.h
@@ -237,8 +237,8 @@ enum davinci_dm365_index {
 	DM365_EMAC_MDIO,
 	DM365_EMAC_MDCLK,
 
-	/* Keypad */
-	DM365_KEYPAD,
+	/* Key Scan */
+	DM365_KEYSCAN,
 
 	/* PWM */
 	DM365_PWM0,