1 // SPDX-License-Identifier: GPL-2.0-only
5  * SLD 9630 TT 1.1 and SLB 9635 TT 1.2 Trusted Platform Module
9  * Sirrix AG - security technologies <[email protected]> and
10  * Applied Data Security Group, Ruhr-University Bochum, Germany
11  * Project-Homepage: http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/ 
19 /* maximum number of WTX-packages */
21 /* msleep-Time for WTX-packages */
23 /* msleep-Time --> Interval to check status register */
25 /* gives number of max. msleep()-calls before throwing timeout */
182 			return -EIO;  in empty_fifo()
193 		/* check the status-register if wait_for_bit is set */  in wait()
200 			dev_err(&chip->dev, "Timeout in wait(STAT_XFE)\n");  in wait()
202 			dev_err(&chip->dev, "Timeout in wait(STAT_RDA)\n");  in wait()
203 		return -EIO;  in wait()
214     /* Note: WTX means Waiting-Time-Extension. Whenever the TPM needs more
215        calculation time, it sends a WTX-package, which has to be acknowledged
217        creation. Set the maximum number of WTX-packages in the definitions
218        above, if the number is reached, the waiting-time will be denied
225 	dev_info(&chip->dev, "Granting WTX (%02d / %02d)\n",  in tpm_wtx()
236 	dev_info(&chip->dev, "Aborting WTX\n");  in tpm_wtx_abort()
257 			return -EIO;  in tpm_inf_recv()
262 		dev_err(&chip->dev,  in tpm_inf_recv()
264 		return -EIO;  in tpm_inf_recv()
277 			dev_err(&chip->dev, "Error handling on vendor layer!\n");  in tpm_inf_recv()
278 			return -EIO;  in tpm_inf_recv()
284 		size = size - 6;  in tpm_inf_recv()
289 		dev_info(&chip->dev, "WTX-package received\n");  in tpm_inf_recv()
300 		dev_info(&chip->dev, "WTX-abort acknowledged\n");  in tpm_inf_recv()
305 		dev_err(&chip->dev, "ERROR-package received:\n");  in tpm_inf_recv()
307 			dev_err(&chip->dev,  in tpm_inf_recv()
308 				"-> Negative acknowledgement"  in tpm_inf_recv()
309 				" - retransmit command!\n");  in tpm_inf_recv()
310 		return -EIO;  in tpm_inf_recv()
312 	return -EIO;  in tpm_inf_recv()
326 		dev_err(&chip->dev, "Timeout while clearing FIFO\n");  in tpm_inf_send()
327 		return -EIO;  in tpm_inf_send()
332 		return -EIO;  in tpm_inf_send()
405 	/* read IO-ports through PnP */  in tpm_inf_pnp_probe()
416 			rc = -EINVAL;  in tpm_inf_pnp_probe()
419 		dev_info(&dev->dev, "Found %s with ID %s\n",  in tpm_inf_pnp_probe()
420 			 dev->name, dev_id->id);  in tpm_inf_pnp_probe()
422 			rc = -EINVAL;  in tpm_inf_pnp_probe()
428 			rc = -EINVAL;  in tpm_inf_pnp_probe()
434 			rc = -EINVAL;  in tpm_inf_pnp_probe()
445 		dev_info(&dev->dev, "Found %s with ID %s\n",  in tpm_inf_pnp_probe()
446 			 dev->name, dev_id->id);  in tpm_inf_pnp_probe()
451 			rc = -EINVAL;  in tpm_inf_pnp_probe()
458 			rc = -EINVAL;  in tpm_inf_pnp_probe()
464 		 * a single large mem region with the device config  in tpm_inf_pnp_probe()
472 		rc = -EINVAL;  in tpm_inf_pnp_probe()
493 		chipname = " (SLD 9630 TT 1.1)";  in tpm_inf_pnp_probe()
496 		chipname = " (SLB 9635 TT 1.2)";  in tpm_inf_pnp_probe()
505 		/* configure TPM with IO-ports */  in tpm_inf_pnp_probe()
511 		/* control if IO-ports are set correctly */  in tpm_inf_pnp_probe()
518 			dev_err(&dev->dev,  in tpm_inf_pnp_probe()
519 				"Could not set IO-data registers to 0x%x\n",  in tpm_inf_pnp_probe()
521 			rc = -EIO;  in tpm_inf_pnp_probe()
534 		dev_info(&dev->dev, "TPM found: "  in tpm_inf_pnp_probe()
551 		chip = tpmm_chip_alloc(&dev->dev, &tpm_inf);  in tpm_inf_pnp_probe()
563 		rc = -ENODEV;  in tpm_inf_pnp_probe()
599 	/* Re-configure TPM after suspending */  in tpm_inf_resume()
629 MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");