12  * Device driver for TCG/TCPA TPM (trusted platform module).
23 #include "tpm.h"
31  * TCG Specification TPM Main Part 2 TPM Structures Section 17. The
283  * @chip:    TPM chip to use.
284  * @ordinal: TPM command ordinal.
315  * tpm1_startup() - turn on the TPM
316  * @chip: TPM chip to use
318  * Normally the firmware should start the TPM. This function is provided as a
320  * example when a TPM emulator is used.
329 	dev_info(&chip->dev, "starting up the TPM manually\n");  in tpm1_startup()
337 	rc = tpm_transmit_cmd(chip, &buf, 0, "attempting to start the TPM");  in tpm1_startup()
361 		dev_err(&chip->dev, "A TPM error (%zd) occurred attempting to determine the timeouts\n",  in tpm1_get_timeouts()
455 		dev_info(&chip->dev, "Adjusting TPM timeout parameters.");  in tpm1_get_timeouts()
521  * tpm1_get_random() - get random bytes from the TPM's RNG
528  * * -errno (positive TPM return codes are masked to -EIO)
614  * tpm1_continue_selftest() - run TPM's selftest
615  * @chip: TPM chip to use
618  * a TPM error code.
635  * tpm1_do_selftest - have the TPM continue its selftest and wait until it
637  * @chip: TPM chip to use
640  * a TPM error code.
657 		dev_info(&chip->dev, "TPM not ready (%d)\n", rc);  in tpm1_do_selftest()
659 	/* This may fail if there was no TPM driver during a suspend/resume  in tpm1_do_selftest()
674 			dev_info(&chip->dev, HW_ERR "TPM command timed out during continue self test");  in tpm1_do_selftest()
680 			dev_info(&chip->dev, "TPM is disabled/deactivated (0x%X)\n",  in tpm1_do_selftest()
682 			/* TPM is disabled and/or deactivated; driver can  in tpm1_do_selftest()
683 			 * proceed and TPM does handle commands for  in tpm1_do_selftest()
698  * tpm1_auto_startup - Perform the standard automatic TPM initialization
700  * @chip: TPM chip to use
713 		dev_warn(&chip->dev, "TPM self test failed, switching to the firmware upgrade mode\n");  in tpm1_auto_startup()
714 		/* A TPM in this state possibly allows or needs a firmware upgrade */  in tpm1_auto_startup()
718 		dev_err(&chip->dev, "TPM self test failed\n");  in tpm1_auto_startup()
733  * @chip: TPM chip to use.
734  * @tpm_suspend_pcr: flush pcr for buggy TPM chips.
736  * The functions saves the TPM state to be restored on resume.
750 	/* for buggy tpm, flush pcrs with extend to selected dummy */  in tpm1_pm_suspend()
762 		 * If the TPM indicates that it is too busy to respond to  in tpm1_pm_suspend()
764 		 * several seconds for this TPM to be ready.  in tpm1_pm_suspend()
766 		 * This can happen if the TPM has already been sent the  in tpm1_pm_suspend()
769 		 * may cause the TPM to invalidate previously saved state.  in tpm1_pm_suspend()
782 		dev_warn(&chip->dev, "TPM savestate took %dms\n",  in tpm1_pm_suspend()
792  * @chip: TPM chip to use.