touchscreen: Add Cypress driver

Add the Cypress SPI based touchscreen for ux500.

ST-Ericsson ID: CR321190,279760
ST-Ericsson Linux next: NA
ST-Ericsson FOSS-OUT ID:10249

Ref: Commit-ids: I0b25b7e97968901ff747be62e571134ebb6ad3de
	    Id: Iac75daa197826d8a0bb4c1d394a834575bf601eb
	    Id: Iec8c5516768d85f9f8b301984618bc5b394d4927

Change-Id: I56a3a6080a90553a2a8099f2dc243d85a8229688
Signed-off-by: Avinash A <Avinash.a@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/30533
Reviewed-by: Avinash A <avinash.a@stericsson.com>
Tested-by: Avinash A <avinash.a@stericsson.com>

7 files changed, 322 insertions, 1 deletions

diff --git a/arch/arm/configs/u5500_defconfig b/arch/arm/configs/u5500_defconfig
index 1552ceb6ca9..62a03b583b2 100644
--- a/arch/arm/configs/u5500_defconfig
+++ b/arch/arm/configs/u5500_defconfig
@@ -917,6 +917,8 @@ CONFIG_INPUT_TOUCHSCREEN=y
 # CONFIG_TOUCHSCREEN_AD7879 is not set
 # CONFIG_TOUCHSCREEN_ATMEL_MXT is not set
 # CONFIG_TOUCHSCREEN_BU21013 is not set
+CONFIG_TOUCHSCREEN_CYTTSP_CORE=y
+CONFIG_TOUCHSCREEN_CYTTSP_SPI=y
 # CONFIG_TOUCHSCREEN_CY8CTMG110 is not set
 # CONFIG_TOUCHSCREEN_DYNAPRO is not set
 # CONFIG_TOUCHSCREEN_HAMPSHIRE is not set
diff --git a/arch/arm/mach-ux500/Makefile b/arch/arm/mach-ux500/Makefile
index 6cef6057421..e48b2d74649 100644
--- a/arch/arm/mach-ux500/Makefile
+++ b/arch/arm/mach-ux500/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_REGULATOR)			+= regulator-u5500.o
 obj-$(CONFIG_UX500_SOC_DBX500)	+= cpu-db5500.o dma-db5500.o \
 				   devices-db5500.o clock-db5500.o \
 				   clock-debug.o
+obj-$(CONFIG_TOUCHSCREEN_CYTTSP_SPI)    += board-u5500-cyttsp.o
 endif
 ifeq ($(CONFIG_UX500_SOC_DB8500), y)
 obj-$(CONFIG_REGULATOR)			+= regulator-u8500.o
@@ -28,7 +29,8 @@ obj-$(CONFIG_MACH_U8500)	+= board-mop500.o board-mop500-sdi.o \
 				board-mop500-mcde.o \
 				board-mop500-msp.o board-mop500-bm.o \
 				board-pins-sleep-force.o \
-				board-mop500-wlan.o
+				board-mop500-wlan.o \
+				board-mop500-cyttsp.o
 obj-$(CONFIG_ANDROID_STE_TIMED_VIBRA)	+= board-mop500-vibra.o
 obj-$(CONFIG_SENSORS1P_MOP)             += sensors1p.o
 obj-$(CONFIG_MACH_U5500)	+= board-u5500.o board-u5500-sdi.o \
diff --git a/arch/arm/mach-ux500/board-mop500-cyttsp.c b/arch/arm/mach-ux500/board-mop500-cyttsp.c
new file mode 100755
index 00000000000..8904f27a895
--- /dev/null
+++ b/arch/arm/mach-ux500/board-mop500-cyttsp.c
@@ -0,0 +1,158 @@
+/*
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Author: Avinash A <avinash.a@stericsson.com> for ST-Ericsson
+ * License terms:GNU General Public License (GPL) version 2
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/gpio.h>
+#include <linux/cyttsp.h>
+#include <linux/delay.h>
+#include <linux/amba/pl022.h>
+#include <plat/pincfg.h>
+#include "include/mach/prcmu-db8500.h"
+
+#include "pins-db8500.h"
+#include "board-mop500.h"
+#include "devices-db8500.h"
+
+#define NUM_SSP_CLIENTS 10
+
+/* cyttsp_gpio_board_init : configures the touch panel. */
+static int cyttsp_plat_init(int on)
+{
+	int ret;
+
+	ret = gpio_direction_output(CYPRESS_SLAVE_SELECT_GPIO, 1);
+	if (ret < 0) {
+		pr_err("slave select gpio direction failed\n");
+		gpio_free(CYPRESS_SLAVE_SELECT_GPIO);
+		return ret;
+	}
+	return 0;
+}
+
+static struct pl022_ssp_controller mop500_spi2_data = {
+	.bus_id         = SPI023_2_CONTROLLER,
+	.num_chipselect = NUM_SSP_CLIENTS,
+};
+
+static int cyttsp_wakeup(void)
+{
+	int ret;
+
+	ret = gpio_request(CYPRESS_TOUCH_INT_PIN, "Wakeup_pin");
+	if (ret < 0) {
+		pr_err("touch gpio failed\n");
+		return ret;
+	}
+	ret = gpio_direction_output(CYPRESS_TOUCH_INT_PIN, 1);
+	if (ret < 0) {
+		pr_err("touch gpio direction failed\n");
+		goto out;
+	}
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 0);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 1);
+	/*
+	 * To wake up the controller from sleep
+	 * state the interrupt pin needs to be
+	 * pulsed twice with a delay greater
+	 * than 2 micro seconds.
+	 */
+	udelay(3);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 0);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 1);
+	ret = gpio_direction_input(CYPRESS_TOUCH_INT_PIN);
+	if (ret < 0) {
+		pr_err("touch gpio direction IN config failed\n");
+		goto out;
+	}
+out:
+	gpio_free(CYPRESS_TOUCH_INT_PIN);
+	return 0;
+}
+struct cyttsp_platform_data cyttsp_platdata = {
+	.maxx = 480,
+	.maxy = 854,
+	.flags = 0,
+	.gen = CY_GEN3,
+	.use_st = 0,
+	.use_mt = 1,
+	.use_trk_id = 0,
+	.use_hndshk = 0,
+	.use_sleep = 1,
+	.use_gestures = 0,
+	.use_load_file = 0,
+	.use_force_fw_update = 0,
+	.use_virtual_keys = 0,
+	/* activate up to 4 groups and set active distance */
+	.gest_set = CY_GEST_GRP_NONE | CY_ACT_DIST,
+	/* change scn_type to enable finger and/or stylus detection */
+	.scn_typ = 0xA5, /* autodetect finger+stylus; balanced mutual scan */
+	.act_intrvl = CY_ACT_INTRVL_DFLT,  /* Active refresh interval; ms */
+	.tch_tmout = CY_TCH_TMOUT_DFLT,   /* Active touch timeout; ms */
+	.lp_intrvl = CY_LP_INTRVL_DFLT,   /* Low power refresh interval; ms */
+	.init = cyttsp_plat_init,
+	.mt_sync = input_mt_sync,
+	.wakeup = cyttsp_wakeup,
+	.name = CY_SPI_NAME,
+	.irq_gpio = CYPRESS_TOUCH_INT_PIN,
+	.rst_gpio = CYPRESS_TOUCH_RST_GPIO,
+};
+
+static void cyttsp_spi_cs_control(u32 command)
+{
+	if (command == SSP_CHIP_SELECT)
+		gpio_set_value(CYPRESS_SLAVE_SELECT_GPIO, 0);
+	else if (command == SSP_CHIP_DESELECT)
+		gpio_set_value(CYPRESS_SLAVE_SELECT_GPIO, 1);
+}
+
+static struct pl022_config_chip cyttsp_ssp_config_chip = {
+	.com_mode = INTERRUPT_TRANSFER,
+	.iface = SSP_INTERFACE_MOTOROLA_SPI,
+	/* we can act as master only */
+	.hierarchy = SSP_MASTER,
+	.slave_tx_disable = 0,
+	.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
+	.tx_lev_trig = SSP_TX_16_OR_MORE_EMPTY_LOC,
+	.ctrl_len = SSP_BITS_16,
+	.wait_state = SSP_MWIRE_WAIT_ZERO,
+	.duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
+	.cs_control = cyttsp_spi_cs_control,
+};
+
+static struct spi_board_info cypress_spi_devices[] = {
+	{
+		.modalias = CY_SPI_NAME,
+		.controller_data = &cyttsp_ssp_config_chip,
+		.platform_data = &cyttsp_platdata,
+		.max_speed_hz = 1000000,
+		.bus_num = SPI023_2_CONTROLLER,
+		.chip_select = 0,
+		.mode = SPI_MODE_0,
+	}
+};
+
+void mop500_cyttsp_init(void)
+{
+	int ret = 0;
+
+	/*
+	 * Enable the alternative C function
+	 * in the PRCMU register
+	 */
+	prcmu_enable_spi2();
+	ret = gpio_request(CYPRESS_SLAVE_SELECT_GPIO, "slave_select_gpio");
+	if (ret < 0)
+		pr_err("slave select gpio failed\n");
+	spi_register_board_info(cypress_spi_devices,
+			ARRAY_SIZE(cypress_spi_devices));
+}
+
+void __init mop500_u8500uib_r3_init(void)
+{
+	mop500_cyttsp_init();
+	db8500_add_spi2(&mop500_spi2_data);
+}
diff --git a/arch/arm/mach-ux500/board-mop500.c b/arch/arm/mach-ux500/board-mop500.c
index 41a5e4a3979..d21c64f9cf1 100644
--- a/arch/arm/mach-ux500/board-mop500.c
+++ b/arch/arm/mach-ux500/board-mop500.c
@@ -36,6 +36,7 @@
 #include <linux/pwm_backlight.h>
 #include <linux/gpio/nomadik.h>
 #include <linux/leds.h>
+#include <linux/cyttsp.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -998,6 +999,10 @@ static struct pl022_ssp_controller ssp0_platform_data = {
 	 */
 	.num_chipselect = NUM_SSP_CLIENTS,
 };
+static struct pl022_ssp_controller mop500_spi2_data = {
+	.bus_id	= SPI023_2_CONTROLLER,
+	.num_chipselect = NUM_SSP_CLIENTS,
+};
 
 static void __init mop500_spi_init(void)
 {
diff --git a/arch/arm/mach-ux500/board-u5500-cyttsp.c b/arch/arm/mach-ux500/board-u5500-cyttsp.c
new file mode 100755
index 00000000000..f0f8192fade
--- /dev/null
+++ b/arch/arm/mach-ux500/board-u5500-cyttsp.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Author: Avinash A <avinash.a@stericsson.com> for ST-Ericsson
+ * License terms:GNU General Public License (GPL) version 2
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/spi/spi.h>
+#include <linux/gpio.h>
+#include <linux/cyttsp.h>
+#include <linux/delay.h>
+#include <linux/amba/pl022.h>
+#include <plat/pincfg.h>
+#include <mach/hardware.h>
+
+#include "pins-db5500.h"
+#include "board-u5500.h"
+
+/* cyttsp_gpio_board_init : configures the touch panel. */
+static int cyttsp_plat_init(int on)
+{
+	int ret;
+
+	ret = gpio_direction_output(CYPRESS_SLAVE_SELECT_GPIO, 1);
+	if (ret < 0) {
+		pr_err("slave select gpio direction failed\n");
+		gpio_free(CYPRESS_SLAVE_SELECT_GPIO);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int cyttsp_wakeup(void)
+{
+	int ret;
+
+	ret = gpio_request(CYPRESS_TOUCH_INT_PIN, "Wakeup_pin");
+	if (ret < 0) {
+		pr_err("touch gpio failed\n");
+		return ret;
+	}
+	ret = gpio_direction_output(CYPRESS_TOUCH_INT_PIN, 1);
+	if (ret < 0) {
+		pr_err("touch gpio direction failed\n");
+		goto out;
+	}
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 0);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 1);
+	/*
+	 * To wake up the controller from sleep
+	 * state the interrupt pin needs to be
+	 * pulsed twice with a delay greater
+	 * than 2 micro seconds.
+	 */
+	udelay(3);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 0);
+	gpio_set_value(CYPRESS_TOUCH_INT_PIN, 1);
+	ret = gpio_direction_input(CYPRESS_TOUCH_INT_PIN);
+	if (ret < 0) {
+		pr_err("touch gpio direction IN config failed\n");
+		goto out;
+	}
+out:
+	gpio_free(CYPRESS_TOUCH_INT_PIN);
+	return 0;
+}
+static struct cyttsp_platform_data cyttsp_spi_platdata = {
+	.maxx = 480,
+	.maxy = 854,
+	.flags = 0,
+	.gen = CY_GEN3,
+	.use_st = 0,
+	.use_mt = 1,
+	.use_trk_id = 0,
+	.use_hndshk = 0,
+	.use_sleep = 1,
+	.use_gestures = 0,
+	.use_load_file = 0,
+	.use_force_fw_update = 0,
+	.use_virtual_keys = 0,
+	/* activate up to 4 groups and set active distance */
+	.gest_set = CY_GEST_GRP_NONE | CY_ACT_DIST,
+	/* change scn_type to enable finger and/or stylus detection */
+	.scn_typ = 0xA5, /* autodetect finger+stylus; balanced mutual scan */
+	.act_intrvl = CY_ACT_INTRVL_DFLT,  /* Active refresh interval; ms */
+	.tch_tmout = CY_TCH_TMOUT_DFLT,   /* Active touch timeout; ms */
+	.lp_intrvl = CY_LP_INTRVL_DFLT,   /* Low power refresh interval; ms */
+	.init = cyttsp_plat_init,
+	.mt_sync = input_mt_sync,
+	.wakeup = cyttsp_wakeup,
+	.name = CY_SPI_NAME,
+	.irq_gpio = CYPRESS_TOUCH_INT_PIN,
+	.rst_gpio = CYPRESS_TOUCH_RST_GPIO,
+};
+
+static void cyttsp_spi_cs_control(u32 command)
+{
+	if (command == SSP_CHIP_SELECT)
+		gpio_set_value(CYPRESS_SLAVE_SELECT_GPIO, 0);
+	else if (command == SSP_CHIP_DESELECT)
+		gpio_set_value(CYPRESS_SLAVE_SELECT_GPIO, 1);
+}
+
+static struct pl022_config_chip cyttsp_ssp_config_chip = {
+	.com_mode = INTERRUPT_TRANSFER,
+	.iface = SSP_INTERFACE_MOTOROLA_SPI,
+	/* we can act as master only */
+	.hierarchy = SSP_MASTER,
+	.slave_tx_disable = 0,
+	.rx_lev_trig = SSP_RX_1_OR_MORE_ELEM,
+	.tx_lev_trig = SSP_TX_16_OR_MORE_EMPTY_LOC,
+	.ctrl_len = SSP_BITS_16,
+	.wait_state = SSP_MWIRE_WAIT_ZERO,
+	.duplex = SSP_MICROWIRE_CHANNEL_FULL_DUPLEX,
+	.cs_control = cyttsp_spi_cs_control,
+};
+
+static struct spi_board_info cypress_spi_devices[] = {
+	{
+		.modalias = CY_SPI_NAME,
+		.controller_data = &cyttsp_ssp_config_chip,
+		.platform_data = &cyttsp_spi_platdata,
+		.max_speed_hz = 1000000,
+		.bus_num = 1,
+		.chip_select = 0,
+		.mode = SPI_MODE_0,
+	}
+};
+
+void u5500_cyttsp_init(void)
+{
+	int ret = 0;
+
+	ret = gpio_request(CYPRESS_SLAVE_SELECT_GPIO, "slave_select_gpio");
+	if (ret < 0) {
+		pr_err("slave select gpio failed\n");
+		return;
+	}
+	if (cpu_is_u5500v2())
+		cyttsp_spi_platdata.invert = true;
+	spi_register_board_info(cypress_spi_devices,
+			ARRAY_SIZE(cypress_spi_devices));
+}
+
diff --git a/arch/arm/mach-ux500/board-u5500.c b/arch/arm/mach-ux500/board-u5500.c
index 411caccbc96..af551a870e9 100644
--- a/arch/arm/mach-ux500/board-u5500.c
+++ b/arch/arm/mach-ux500/board-u5500.c
@@ -19,6 +19,7 @@
 #include <linux/input/matrix_keypad.h>
 #include <linux/lsm303dlh.h>
 #include <linux/leds-ab5500.h>
+#include <linux/cyttsp.h>
 
 #include <video/av8100.h>
 
@@ -582,6 +583,10 @@ static void __init u5500_init_machine(void)
 	db5500_add_keypad(&u5500_keypad_board);
 	u5500_cryp1_hash1_init();
 
+#ifdef CONFIG_TOUCHSCREEN_CYTTSP_SPI
+	u5500_cyttsp_init();
+#endif
+
 	platform_add_devices(u5500_platform_devices,
 			     ARRAY_SIZE(u5500_platform_devices));
 }
diff --git a/arch/arm/mach-ux500/board-u5500.h b/arch/arm/mach-ux500/board-u5500.h
index dda59f39bdf..5d6eb221e8f 100644
--- a/arch/arm/mach-ux500/board-u5500.h
+++ b/arch/arm/mach-ux500/board-u5500.h
@@ -12,6 +12,9 @@
 #define GPIO_MMC_CARD_VSEL     185
 #define GPIO_PRIMARY_CAM_XSHUTDOWN  1
 #define GPIO_SECONDARY_CAM_XSHUTDOWN  2
+#define CYPRESS_TOUCH_INT_PIN 179
+#define CYPRESS_TOUCH_RST_GPIO 135
+#define CYPRESS_SLAVE_SELECT_GPIO 186
 
 
 struct ab5500_regulator_platform_data;
@@ -19,5 +22,6 @@ extern struct ab5500_regulator_platform_data u5500_ab5500_regulator_data;
 
 extern void u5500_pins_init(void);
 extern void __init u5500_regulators_init(void);
+void u5500_cyttsp_init(void);
 
 #endif