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Commit d5c077b0 authored by Shashank Babu Chinta Venkata's avatar Shashank Babu Chinta Venkata
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input: touchscreen: st: add trusted touch support 



Add Trusted touch support to lahaina MTP
Touchscreen driver. This feature enables driver to
operate in trusted touch mode in trusted virtual machine(TVM).
The primary virtual machine(PVM) lends resources such
as IO memory and touch irq to TVM prior to trusted touch
is initiated and reclaims those resources back after trusted
touch usecase finishes.The resource requirements of TVM
such as clock, regulators etc are taken care by PVM.

Change-Id: I584fa3c96796b8a34f1948847e83aac7ce913d94
Signed-off-by: default avatarShashank Babu Chinta Venkata <sbchin@codeaurora.org>
parent 04fda4c2

drivers/input/touchscreen/st/Kconfig

+10 −0
Original line number Diff line number Diff line
@@ -20,3 +20,13 @@ config TOUCHSCREEN_ST_I2C 
	depends on TOUCHSCREEN_ST

	help

	 This enables support for ST touch panel over I2C based touchscreens.



config ST_TRUSTED_TOUCH

       bool "STMicroelectronics Trusted Touch"

       depends on TOUCHSCREEN_ST

       help

         Say Y here to enable STMicroelectronics Trusted Touch in supported drivers.



         If unsure, say N.



#endif

drivers/input/touchscreen/st/fts.c

+1044 −80

File changed.

Preview size limit exceeded, changes collapsed.

drivers/input/touchscreen/st/fts.h

+43 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
/*#include <linux/wakelock.h>*/

#include <linux/pm_wakeup.h>

#include <linux/timekeeping.h>

#include <linux/haven/hh_irq_lend.h>



#include "fts_lib/ftsSoftware.h"

#include "fts_lib/ftsHardware.h"
@@ -211,6 +212,33 @@ struct event_dispatch_handler_t { 
	void (*handler)(struct fts_ts_info *info, unsigned char *data);

};



enum trusted_touch_mode_config {

	TRUSTED_TOUCH_VM_MODE,

	TRUSTED_TOUCH_MODE_NONE

};



#ifdef CONFIG_ST_TRUSTED_TOUCH

#define TRUSTED_TOUCH_MEM_LABEL 0x7



struct trusted_touch_vm_info {

	enum hh_irq_label irq_label;

	enum hh_vm_names vm_name;

	u32 hw_irq;

	hh_memparcel_handle_t vm_mem_handle;

	u32 *iomem_bases;

	u32 *iomem_sizes;

	u32 iomem_list_size;

	void *mem_cookie;

#ifdef CONFIG_ARCH_QTI_VM

	atomic_t tvm_owns_iomem;

	atomic_t tvm_owns_irq;

#else

	atomic_t pvm_owns_iomem;

	atomic_t pvm_owns_irq;

#endif

};

#endif



/*

 * struct fts_ts_info - FTS capacitive touch screen device information

 * @dev:                  Pointer to the structure device
@@ -325,12 +353,27 @@ struct fts_ts_info { 
	int aoi_top;

	int aoi_bottom;

	int aoi_right;



#ifdef CONFIG_ST_TRUSTED_TOUCH

	struct trusted_touch_vm_info *vm_info;

	struct mutex fts_clk_io_ctrl_mutex;

	const char *touch_environment;

	struct completion trusted_touch_powerdown;

	struct completion resource_checkpoint;

	struct clk *core_clk;

	struct clk *iface_clk;

	atomic_t trusted_touch_initialized;

	atomic_t trusted_touch_enabled;

	atomic_t delayed_vm_probe_pending;

	atomic_t trusted_touch_mode;

#endif

};



extern struct chipInfo ftsInfo;



int fts_chip_powercycle(struct fts_ts_info *info);

int fts_chip_powercycle2(struct fts_ts_info *info, unsigned long sleep);

void release_all_touches(struct fts_ts_info *info);

/*int fts_get_fw_version(struct fts_ts_info *info);*/

/*extern unsigned int le_to_uint(const unsigned char *ptr);*/

/*extern unsigned int be_to_uint(const unsigned char *ptr);*/