drvgfaspi/sfsattrib.c

#include <linux/version.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/kobject.h>
#include <linux/errno.h>
#include <linux/ctype.h>
#include <linux/sysfs.h>
#include <linux/syscalls.h>
#include "defines.h"
#include "sfsattrib.h"
#include "kfirmware.h"
#include "ksync.h"
#include "kfile.h"
#include "ktiva.h"

/////////////////////////////////////////////////////////////////////////////

int g_hw = -1, g_sw = -1;
TIVA_ADC g_tadc;
unsigned long long g_nUpTime = 0;
TIVA_DCAP g_dcaps;

TIVA_MEMORY_MAP g_tiMM[] =
{
	{	// Flash
		.baseAddr = KTIVA_FLASH_BASE_ADDRESS,
		.bIsRO = true
	},
	{	// SRAM
		.baseAddr = KTIVA_SRAM_BASE_ADDRESS,
		.bIsRO = false
	},
	{	// Bit banded SRAM
		.baseAddr = KTIVA_SRAM_BIT_BAND_BASE_ADDRESS,
		.bIsRO = false
	},
	{	// Peripherals
		.baseAddr = KTIVA_PERIPHERALS_BASE_ADDRESS,
		.size = KTIVA_PERIPHERALS_SIZE,
		.bIsRO = false
	},
	{	// Bit banded Peripherals
		.baseAddr = KTIVA_PERIPHERALS_BIT_BAND_BASE_ADDRESS,
		.size = KTIVA_PERIPHERALS_BIT_BAND_SIZE,
		.bIsRO = false
	}
};

static void *g_pFwBuffer	= NULL;
static size_t g_nCbFwData	= 0;

static atomic_t g_flgFwLocked;
static atomic_t g_flgBacklightChanged;
static atomic_t g_valBacklightDutyCyclePercent;
static atomic_t g_valBacklightPeriod;

/////////////////////////////////////////////////////////////////////////////

void time64_to_tm(time64_t totalsecs, int offset, struct tm *result);

/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////

bool SfAttInit(void)
{
	g_nCbFwData = 0;
	atomic_set(&g_flgBacklightChanged, 0);
	SfAttSetBacklightPeriod(_BACKLIGHT_PERIOD_DEFAULT);
	SfAttSetBacklightDutyCyclePercent(_BACKLIGHT_DUTY_CYCLE_PERC_DEF);

	if(krtc_init() < 0)
	{
		KALERT("%s: krtc_init failed!\n", __FUNCTION__);
	}
	
	memset(&g_dcaps, 0xFF, sizeof(g_dcaps));

	g_pFwBuffer = (void*)__get_free_pages(GFP_KERNEL, _FIRMWARE_PAGES_COUNT);
	return !!g_pFwBuffer;
}

void SfAttExit(void)
{
	g_nCbFwData = 0;
	if(g_pFwBuffer)
	{
		free_pages((unsigned long)g_pFwBuffer, _FIRMWARE_PAGES_COUNT);
		g_pFwBuffer = NULL;
	}
}

/////////////////////////////////////////////////////////////////////////////

static bool _AddressReadable(unsigned int nAddr, unsigned int nLength)
{
	size_t i;
	LPCTIVA_MEMORY_MAP pmm = g_tiMM;
	for(i = 0; i < _countof(g_tiMM); ++i, ++pmm)
	{
		if(	(nAddr < pmm->baseAddr + pmm->size) &&
			(nAddr >= pmm->baseAddr))
		{
			return (nAddr + nLength) <= pmm->baseAddr + pmm->size;
		}
	}
	return false;
}

static bool _AddressWriteable(unsigned int nAddr, unsigned int nLength)
{
	size_t i;
	LPCTIVA_MEMORY_MAP pmm = g_tiMM;
	for(i = 0; i < _countof(g_tiMM); ++i, ++pmm)
	{
		if(	!pmm->bIsRO &&
			(nAddr < pmm->baseAddr + pmm->size) &&
			(nAddr >= pmm->baseAddr))
		{
			return (nAddr + nLength) <= pmm->baseAddr + pmm->size;
		}
	}
	return false;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t version_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int hw, sw;
	ksync_lock();
	hw = g_hw;
	sw = g_sw;
	ksync_unlock();
	return sprintf(buf, "%d %d", hw, sw);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t did_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	TIVA_DCAP dcaps;
	ksync_lock();
	dcaps = g_dcaps;
	ksync_unlock();
	return sprintf(buf, "DID0: %08X\n" \
						"DID1: %08X\n" \
						"##############\n" \
						"DID0Ver: %X\n" \
						"Class: %X\n" \
						"RevMaj: %X\n" \
						"RevMin: %X\n" \
						"##############\n" \
						"DID1Ver: %X\n" \
						"Family: %X\n" \
						"PartNo: %X\n" \
						"PinCnt: %X\n" \
						"TempRange: %X\n" \
						"PackageType: %X\n" \
						"RoHSComp: %X\n" \
						"QualStat: %X\n", \
						dcaps.did0, dcaps.did1,
						dcaps.ver0, dcaps.cls, dcaps.maj, dcaps.min,
						dcaps.ver1, dcaps.fam, dcaps.partno, dcaps.pincnt, dcaps.temp, dcaps.pkg, dcaps.rohs, dcaps.qual);
}

static ssize_t uptime_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	unsigned long long nVal;
	ksync_lock();
	nVal = g_nUpTime;
	ksync_unlock();
	return sprintf(buf, "%llu", nVal);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t UVers_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int nVal;
	ksync_lock();
	nVal = g_tadc.UVers + 40;
	ksync_unlock();
	return sprintf(buf, "%d.%02d", nVal / 100, nVal % 100);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t UBatV3_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int nVal;
	ksync_lock();
	nVal = g_tadc.UBatV3;
	ksync_unlock();
	return sprintf(buf, "%d.%02d", nVal / 100, nVal % 100);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t TempBoard_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int nVal;
	ksync_lock();
	nVal = g_tadc.Temp;
	ksync_unlock();
	return sprintf(buf, "%d.%d0", nVal / 10, nVal % 10);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t UV5Vsys_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int nVal;
	ksync_lock();
	nVal = g_tadc.UV5Vsys;
	ksync_unlock();
	return sprintf(buf, "%d.%02d", nVal / 100, nVal % 100);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t UV3V6Bat_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int nVal;
	ksync_lock();
	nVal = g_tadc.UV3V6Bat;
	ksync_unlock();
	return sprintf(buf, "%d.%02d", nVal / 100, nVal % 100);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t TempTIVA_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	long nVal;
	ksync_lock();
	nVal = 14750 - 18750 * g_tadc.TempTIVA / 4096;
	ksync_unlock();
	return sprintf(buf, "%ld.%02ld", nVal / 100, nVal % 100);
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t AdcBin_read(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
	if(off >= sizeof(g_tadc))
		return 0;
	if((len + off) > sizeof(g_tadc))
		len = sizeof(g_tadc) - off;

	ksync_lock();
	memcpy(buf, ((const unsigned char*)&g_tadc) + off, len);
	ksync_unlock();
	return (ssize_t)len;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t dutycycle_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
{
	ssize_t ret = -EINVAL;
	if(buf && count)
	{
		char szBuf[32];
		long long val;
		if(count >= sizeof(szBuf))
			return -ENOMEM;
		memcpy(szBuf, buf, count);
		szBuf[count] = '\0';
		if(!(ret = kstrtoll(szBuf, 10, &val)))
		{
			SfAttSetBacklightDutyCyclePercent(val);
			atomic_set(&g_flgBacklightChanged, 1);
			ret = count;
		}
	}
	return ret;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t period_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
{
	ssize_t ret = -EINVAL;
	if(buf && count)
	{
		char szBuf[32];
		long long val;
		if(count >= sizeof(szBuf))
			return -ENOMEM;
		memcpy(szBuf, buf, count);
		szBuf[count] = '\0';
		if(!(ret = kstrtoll(szBuf, 10, &val)))
		{
			SfAttSetBacklightPeriod(val);
			atomic_set(&g_flgBacklightChanged, 1);
			ret = count;
		}
	}
	return ret;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t image_read(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
	return -EACCES;
/*	if(off >= g_nCbFwData)
		return 0;
	if((off + len) > g_nCbFwData)
		len = g_nCbFwData - off;

	ksync_lock();
	memcpy(buf, ((char*)g_pFwBuffer) + off, len);
	ksync_unlock();

	KALERT("%s buf: %p, off: %lld, len: %zu\n", __FUNCTION__, buf, off, len);
	return len;*/
}

static ssize_t image_write(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
	int nRet;
	size_t nCbUbound;
	static KFW_DROP_CTX dctx;

	if(SfAttIsFirmwareLocked())
		return -EBUSY;
	else if(len == 0)
		return 0;
	else if(off < 0)
		return -EFAULT;
	else if(off >= _FIRMWARE_BUFFER_SIZE)
		return -ENOMEM;
	else if((off + len) > _FIRMWARE_BUFFER_SIZE)
		len = _FIRMWARE_BUFFER_SIZE - off;
	
	if(off == 0) // first block of data
	{
		memset(&dctx, 0, sizeof(dctx));
		ksync_lock();
		g_nCbFwData = 0;
		memset(g_pFwBuffer, 0xFF, _FIRMWARE_BUFFER_SIZE);
		ksync_unlock();
	}

	nCbUbound = off + len;

	ksync_lock();
	memcpy(((char*)g_pFwBuffer) + off, buf, len);
	if(g_nCbFwData < nCbUbound)
		g_nCbFwData = nCbUbound;
	ksync_unlock();
	
	if((nRet = KfwOnDataDropped(g_pFwBuffer, g_nCbFwData, &dctx)) < 0)
	{
		ksync_lock();
		g_nCbFwData = 0;
		ksync_unlock();
		memset(&dctx, 0, sizeof(dctx));
		SfAttLockFirmware(false);
		return nRet;
	}
	else if(nRet > 0)
	{
		ksync_lock();
		g_nCbFwData = 0;
		ksync_unlock();
		memset(&dctx, 0, sizeof(dctx));
	}

//	KALERT("%s buf: %p, off: %lld, len: %zu\n", __FUNCTION__, buf, off, len);
	return len;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t mem_read(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
    int ret;
	unsigned int val;
	struct file *pfSpiDev = NULL;

	if(SfAttIsFirmwareLocked())
		return -EBUSY;

	if(off & 0x00000003)
	{
		KALERT("%s: Invalid address: %lld\n", __FUNCTION__, off);
		return -EFAULT;
	}

	if(len > sizeof(val))
		len = sizeof(val);
	else if(len < sizeof(val))
	{
		KALERT("%s: Buffer too small: %zu\n", __FUNCTION__, len);
		return -EINVAL;
	}

	if(!_AddressReadable(off, len))
	{
		KALERT("%s: Invalid address (0x%llX) or length (%zu)\n", __FUNCTION__, off, len);
		return -EACCES;
	}

//	KALERT("%s: Try to read from 0x%08llX, length %zu Bytes.\n", __FUNCTION__, off, len);

	if((pfSpiDev = kf_open_locked(_SPI_DEVICE, O_RDWR, 0)))
	{
		if(KSpiInit(pfSpiDev))
		{
			if(!(ret = TivaCmdGetAddress(pfSpiDev, (unsigned int)off, &val)))
			{
				memcpy(buf, &val, len);
				ret = (ssize_t)len;
			}
			else
			{
				KALERT("%s: TivaCmdGetAddress failed (%d)\n", __FUNCTION__, ret);
				ret = -EIO;
			}
		}
		else
		{
			KALERT("%s: KSpiInit failed\n", __FUNCTION__);
			ret = -EIO;
		}

		kf_close(pfSpiDev);
	}
	else
	{
		KALERT("%s: kf_open_locked failed\n", __FUNCTION__);
		ret = -EIO;
	}

	return ret;
}

static ssize_t mem_write(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
    int ret;
	struct file *pfSpiDev = NULL;

	if(SfAttIsFirmwareLocked())
		return -EBUSY;
		
	if(off & 0x00000003)
	{
		KALERT("%s: Invalid address: %lld\n", __FUNCTION__, off);
		return -EFAULT;
	}
	
	if(len != sizeof(unsigned int))
	{
		KALERT("%s: Invalid buffer size: %zu (must be %zu)\n", __FUNCTION__, len, sizeof(unsigned int));
		return -EINVAL;
	}

	if(!_AddressWriteable(off, len))
	{
		KALERT("%s: Invalid address (0x%llX) or length (%zu) or range is read-only!\n", __FUNCTION__, off, len);
		return -EACCES;
	}

	if((pfSpiDev = kf_open_locked(_SPI_DEVICE, O_RDWR, 0)))
	{
		if(KSpiInit(pfSpiDev))
		{
			unsigned int val;
			memcpy(&val, buf, sizeof(val));

			if(!(ret = TivaCmdSetAddress(pfSpiDev, (unsigned int)off, val)))
			{
				ret = (ssize_t)len;
			}
			else
			{
				KALERT("%s: TivaCmdSetAddress failed (%d)\n", __FUNCTION__, ret);
				ret = -EIO;
			}
		}
		else
		{
			KALERT("%s: KSpiInit failed\n", __FUNCTION__);
			ret = -EIO;
		}

		kf_close(pfSpiDev);
	}
	else
	{
		KALERT("%s: kf_open_locked failed\n", __FUNCTION__);
		ret = -EIO;
	}

	return ret;
}

static ssize_t map_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "On-chip FLASH:  %08X-%08X  %7X %s\n" \
						"On-chip SRAM:   %08X-%08X  %7X %s\n" \
						"BBA SRAM:       %08X-%08X  %7X %s\n" \
						"Peripheral:     %08X-%08X  %7X %s\n" \
						"BBA Peripheral: %08X-%08X  %7X %s\n",
						g_tiMM[0].baseAddr, g_tiMM[0].baseAddr + g_tiMM[0].size - 1, g_tiMM[0].size, g_tiMM[0].bIsRO ? "RO" : "RW",
						g_tiMM[1].baseAddr, g_tiMM[1].baseAddr + g_tiMM[1].size - 1, g_tiMM[1].size, g_tiMM[1].bIsRO ? "RO" : "RW",
						g_tiMM[2].baseAddr, g_tiMM[2].baseAddr + g_tiMM[2].size - 1, g_tiMM[2].size, g_tiMM[2].bIsRO ? "RO" : "RW",
						g_tiMM[3].baseAddr, g_tiMM[3].baseAddr + g_tiMM[3].size - 1, g_tiMM[3].size, g_tiMM[3].bIsRO ? "RO" : "RW",
						g_tiMM[4].baseAddr, g_tiMM[4].baseAddr + g_tiMM[4].size - 1, g_tiMM[4].size, g_tiMM[4].bIsRO ? "RO" : "RW");
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t iso8601_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	int ret;
	struct tm tm;

	if(SfAttIsFirmwareLocked())
	{
		KALERT("%s: Firmware update in progress!\n", __FUNCTION__);
		return -EBUSY;
	}

	SfAttLockFirmware(true);
	if((ret = krtc_get_date_time(&tm)) < 0)
	{
		SfAttLockFirmware(false);
		KALERT("%s: krtc_get_date_time failed!\n", __FUNCTION__);
		return ret;
	}
	SfAttLockFirmware(false);

	return sprintf(buf, "%04ld-%02d-%02dT%02d:%02d:%02d+00:00\n", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
}

static ssize_t uxts64bin_read(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
	int ret;
	time64_t ts;
	struct tm tm;
	
	if(off != 0)
	{
		KALERT("%s: Offset must be 0!\n", __FUNCTION__);
		return -EINVAL;
	}
	
	if(len < sizeof(ts))
	{
		KALERT("%s: Insufficient buffer size: %zu! At least %zu bytes are required!\n", __FUNCTION__, len, sizeof(time64_t));
		return -ENOMEM;
	}

	if(SfAttIsFirmwareLocked())
	{
		KALERT("%s: Firmware update in progress!\n", __FUNCTION__);
		return -EBUSY;
	}

	SfAttLockFirmware(true);
	if((ret = krtc_get_date_time(&tm)) < 0)
	{
		SfAttLockFirmware(false);
		KALERT("%s: krtc_get_date_time failed!\n", __FUNCTION__);
		return ret;
	}
	SfAttLockFirmware(false);

	ts = mktime64(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
	memcpy(buf, &ts, sizeof(ts));
	return sizeof(ts);
}

static ssize_t uxts64bin_write(struct file *pf, struct kobject *kobj, struct bin_attribute *attr, char *buf, loff_t off, size_t len)
{
	int ret;
	time64_t ts;
	struct tm tm;

	if(off != 0 || len != sizeof(time64_t))
	{
		KALERT("%s: Offset must be 0 and length must be %zu byte!\n", __FUNCTION__, sizeof(time64_t));
		return -EINVAL;
	}

	memcpy(&ts, buf, sizeof(ts));
	
	if((ts < KRTC_TIMESTAMP_2000_01_01) || (ts >= KRTC_TIMESTAMP_2100_01_01))
	{
		KALERT("%s: Date/Time must be >= 2000-01-01 00:00:00 and < 2100-01-01 00:00:00!\n", __FUNCTION__);
		return -EINVAL;
	}

	time64_to_tm(ts, 0, &tm);

	if(SfAttIsFirmwareLocked())
	{
		KALERT("%s: Firmware update in progress!\n", __FUNCTION__);
		return -EBUSY;
	}

	SfAttLockFirmware(true);
	if((ret = krtc_set_date_time(&tm)) < 0)
	{
		SfAttLockFirmware(false);
		KALERT("%s: krtc_get_date_time failed!\n", __FUNCTION__);
		return ret;
	}
	SfAttLockFirmware(false);

	return len;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t ctrl_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	return sprintf(buf, "SysToRtc > 1\n" \
						"RtcToSys > 2\n" \
						"TestI2C  > 3\n");
}

static ssize_t ctrl_store(struct kobject *kobj, struct kobj_attribute *attr, const char *buf, size_t count)
{
	int ret;
	time64_t ts;
	struct tm tm;
	struct timespec64 tp;

	if(SfAttIsFirmwareLocked())
	{
		KALERT("%s: Firmware update in progress!\n", __FUNCTION__);
		return -EBUSY;
	}

	if(count == 2)
	{
		if(!isspace(buf[1]) && (buf[1] != 0))
		{
			KALERT("%s: Invalid input: \"%s\"!\n", __FUNCTION__, buf);
			return -EINVAL;
		}
	}
	else if(count != 1)
	{
		KALERT("%s: Invalid input: \"%s\"!\n", __FUNCTION__, buf);
		return -EINVAL;
	}

	switch(*buf)
	{
	case 1:
	case '1':
//		KALERT("%s: Set System time to RTC\n", __FUNCTION__);
		SfAttLockFirmware(true);
		ts = ktime_get_real_seconds();
		if((ts < KRTC_TIMESTAMP_2000_01_01) || (ts >= KRTC_TIMESTAMP_2100_01_01))
		{
			SfAttLockFirmware(false);
			KALERT("%s: Date/Time must be >= 2000-01-01 00:00:00 and < 2100-01-01 00:00:00!\n", __FUNCTION__);
			return -EINVAL;
		}
		time64_to_tm(ts, 0, &tm);
		if((ret = krtc_set_date_time(&tm)) < 0)
		{
			SfAttLockFirmware(false);
			KALERT("%s: krtc_get_date_time failed!\n", __FUNCTION__);
			return ret;
		}
		SfAttLockFirmware(false);
		break;
	case 2:
	case '2':
//		KALERT("%s: Set RTC to System time\n", __FUNCTION__);
		SfAttLockFirmware(true);
		if((ret = krtc_get_date_time(&tm)) < 0)
		{
			SfAttLockFirmware(false);
			KALERT("%s: krtc_get_date_time failed!\n", __FUNCTION__);
			return ret;
		}
		ts = mktime64(tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec);
		tp.tv_sec = ts;
		tp.tv_nsec = 0;
		do_settimeofday64(&tp);
		SfAttLockFirmware(false);
		break;
	case 3:
	case '3':
		SfAttLockFirmware(true);
		if((ret = krtc_test_i2c()))
		{
			SfAttLockFirmware(false);
			KALERT("%s: I2C-Test error: %d!\n", __FUNCTION__, ret);
			return ret;
		}
		else
			KALERT("%s: I2C-Test success!\n", __FUNCTION__);
		SfAttLockFirmware(false);
		break;
	default:
		KALERT("%s: Invalid input: \"%c\"!\n", __FUNCTION__, *buf);
		return -EINVAL;
	}

	return count;
}

/////////////////////////////////////////////////////////////////////////////

static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, char *buf)
{
	const char *pszType;
	RTCTypes type = krtc_get_type();
	
	switch(type)
	{
	case RTCT_MCP7940:
		pszType = "MCP7940";
		break;
	case RTCT_DS3231:
		pszType = "DS3231";
		break;
	default:
		pszType = "Unknown";
		break;
	}

	return sprintf(buf, "%s\n", pszType);
}

/////////////////////////////////////////////////////////////////////////////

bool SfAttIsFirmwareLocked(void)
{
	return !!atomic_read(&g_flgFwLocked);
}

/////////////////////////////////////////////////////////////////////////////

void SfAttLockFirmware(bool bLock)
{
	atomic_set(&g_flgFwLocked, bLock ? 1 : 0);
}

/////////////////////////////////////////////////////////////////////////////

unsigned int SfAttGetBacklightDutyCyclePercent(void)
{
	return (unsigned int)atomic_read(&g_valBacklightDutyCyclePercent);
}

/////////////////////////////////////////////////////////////////////////////

void SfAttSetBacklightDutyCyclePercent(int val)
{
	if(val < _BACKLIGHT_DUTY_CYCLE_PERC_MIN)
		val = _BACKLIGHT_DUTY_CYCLE_PERC_MIN;
	else if(val > _BACKLIGHT_DUTY_CYCLE_PERC_MAX)
		val = _BACKLIGHT_DUTY_CYCLE_PERC_MAX;
	atomic_set(&g_valBacklightDutyCyclePercent, val);
}

/////////////////////////////////////////////////////////////////////////////

unsigned int SfAttGetBacklightPeriod(void)
{
	return (unsigned int)atomic_read(&g_valBacklightPeriod);
}

/////////////////////////////////////////////////////////////////////////////

void SfAttSetBacklightPeriod(int val)
{
	if(val < _BACKLIGHT_PERIOD_MIN)
		val = _BACKLIGHT_PERIOD_MIN;
	else if(val > _BACKLIGHT_PERIOD_MAX)
		val = _BACKLIGHT_PERIOD_MAX;
	atomic_set(&g_valBacklightPeriod, val);
}

/////////////////////////////////////////////////////////////////////////////

bool SfAttBacklightChanged(void)
{
	bool ret = !!atomic_read(&g_flgBacklightChanged);
	if(ret)
		atomic_set(&g_flgBacklightChanged, 0);
	return ret;
}

/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////////////////
// tiva generic

struct kobj_attribute g_tivaDevIdAtt	= __ATTR_RO(did);
struct kobj_attribute g_tivaUptimeAtt	= __ATTR_RO(uptime);

/////////////////////////////////////////////////////////////////////////////
// backlight

struct kobj_attribute g_tivaDutyCycleAtt	= __ATTR_WO(dutycycle);
struct kobj_attribute g_tivaPeriodAtt		= __ATTR_WO(period);

/////////////////////////////////////////////////////////////////////////////
// ADC

struct kobj_attribute g_tivaUVersAtt	= __ATTR_RO(UVers);
struct kobj_attribute g_tivaUBatV3Att	= __ATTR_RO(UBatV3);
struct kobj_attribute g_tivaTempAtt		= __ATTR_RO(TempBoard);
struct kobj_attribute g_tivaUV5VsysAtt	= __ATTR_RO(UV5Vsys);
struct kobj_attribute g_tivaUV3V6BatAtt	= __ATTR_RO(UV3V6Bat);
struct kobj_attribute g_tivaTempTIVAAtt	= __ATTR_RO(TempTIVA);
struct bin_attribute g_tivaAdcBinAtt	= __BIN_ATTR_RO(AdcBin, sizeof(TIVA_ADC));

/////////////////////////////////////////////////////////////////////////////
// tiva firmware

struct kobj_attribute g_tivaVersionAtt	= __ATTR_RO(version);
struct bin_attribute g_tivaFwImageAtt	= __BIN_ATTR_RW(image, 0);

/////////////////////////////////////////////////////////////////////////////
// tiva memory

struct bin_attribute g_tivaMemory		= __BIN_ATTR_RW(mem, 0);
struct kobj_attribute g_tivaMemMap		= __ATTR_RO(map);

/////////////////////////////////////////////////////////////////////////////
// tiva RTC

struct kobj_attribute g_tivaRtcIso8601	= __ATTR_RO(iso8601);
struct bin_attribute g_tivaRtcUnTsBin64	= __BIN_ATTR_RW(uxts64bin, sizeof(time64_t));
struct kobj_attribute g_tivaRtcCtrl		= __ATTR_RW(ctrl);
struct kobj_attribute g_tivaRtcType		= __ATTR_RO(type);