static ssize_t write(struct file *file, const char *buf, size_t count,
loff_t *ppos)
{
*ppos = 0; /* file position not used, always set to 0 */
/*
** Prevent unauthorized caller to write data.
** TouchSense service is the only valid caller.
*/
if (file->private_data != (void*)TSPDRV_MAGIC_NUMBER)
{
DbgOut((KERN_ERR "tspdrv: unauthorized write.\n"));
return 0;
}
/*
** Ignore packets that have size smaller than SPI_HEADER_SIZE or bigger than MAX_SPI_BUFFER_SIZE.
** Please note that the daemon may send an empty buffer (count == SPI_HEADER_SIZE)
** during quiet time between effects while playing a Timeline effect in order to maintain
** correct timing: if "count" is equal to SPI_HEADER_SIZE, the call to VibeOSKernelLinuxStartTimer()
** will just wait for the next timer tick.
*/
if ((count < SPI_HEADER_SIZE) || (count > MAX_SPI_BUFFER_SIZE))
{
DbgOut((KERN_ERR "tspdrv: invalid buffer size.\n"));
return 0;
}
/* Copy immediately the input buffer */
if (0 != copy_from_user(g_cWriteBuffer, buf, count))
{
/* Failed to copy all the data, exit */
DbgOut((KERN_ERR "tspdrv: copy_from_user failed.\n"));
return 0;
}
/* Extract force output samples and save them in an internal buffer */
if (!SaveOutputData(g_cWriteBuffer, count))
{
DbgOut((KERN_ERR "tspdrv: SaveOutputData failed.\n"));
return 0;
}
/* Start the timer after receiving new output force */
g_bIsPlaying = true;
VibeOSKernelLinuxStartTimer();
return count;
}
static ssize_t write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
*ppos = 0; /* file position not used, always set to 0 */
/*
** Prevent unauthorized caller to write data.
** TouchSense service is the only valid caller.
*/
if (file->private_data != (void*)TSPDRV_MAGIC_NUMBER)
{
DbgOut((DBL_ERROR, "tspdrv: unauthorized write.\n"));
return 0;
}
if(!is_ioctl_enable)
pr_info("drv2604L : [%d-%d]writing after disable ioctl -0x%x,immvibespi:%d\n",
raw_smp_processor_id(),current->pid,count==4?g_cWriteBuffer[3]:0xff,g_bAmpEnabled);
/*
** Ignore packets that have size smaller than SPI_HEADER_SIZE or bigger than MAX_SPI_BUFFER_SIZE.
** Please note that the daemon may send an empty buffer (count == SPI_HEADER_SIZE)
** during quiet time between effects while playing a Timeline effect in order to maintain
** correct timing: if "count" is equal to SPI_HEADER_SIZE, the call to VibeOSKernelLinuxStartTimer()
** will just wait for the next timer tick.
*/
if ((count < SPI_HEADER_SIZE) || (count > MAX_SPI_BUFFER_SIZE))
{
DbgOut((DBL_ERROR, "tspdrv: invalid buffer size.\n"));
return 0;
}
/* Copy immediately the input buffer */
if (0 != copy_from_user(g_cWriteBuffer, buf, count))
{
/* Failed to copy all the data, exit */
DbgOut((DBL_ERROR, "tspdrv: copy_from_user failed.\n"));
return 0;
}
#ifdef CONFIG_TSPDRV_HISTORY
if (count == 4) {
#ifdef CONFIG_TSPDRV_HISTORY_DETAIL
tspdrv_history[tspdrv_idx % TSPDRV_HISORY_MAX].write_value[tspdrv_write_idx % TSPDRV_WRITE_MAX] = g_cWriteBuffer[3];
#endif
if(g_cWriteBuffer[3] == 0)
tspdrv_zero_idx++;
} else if (count == 3) {
#ifdef CONFIG_TSPDRV_HISTORY_DETAIL
tspdrv_history[tspdrv_idx % TSPDRV_HISORY_MAX].write_value[tspdrv_write_idx % TSPDRV_WRITE_MAX] = 0xff;
#endif
tspdrv_byte3_idx++;
}
tspdrv_write_idx++;
#endif
/* Extract force output samples and save them in an internal buffer */
if (!SaveOutputData(g_cWriteBuffer, count))
{
DbgOut((DBL_ERROR, "tspdrv: SaveOutputData failed.\n"));
return 0;
}
/* Start the timer after receiving new output force */
g_bIsPlaying = true;
VibeOSKernelLinuxStartTimer();
return count;
}
