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 <tpmdd@sirrix.com> 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 */
176 			return -EIO;  in empty_fifo()
187 		/* check the status-register if wait_for_bit is set */  in wait()
194 			dev_err(&chip->dev, "Timeout in wait(STAT_XFE)\n");  in wait()
196 			dev_err(&chip->dev, "Timeout in wait(STAT_RDA)\n");  in wait()
197 		return -EIO;  in wait()
208     /* Note: WTX means Waiting-Time-Extension. Whenever the TPM needs more
209        calculation time, it sends a WTX-package, which has to be acknowledged
211        creation. Set the maximum number of WTX-packages in the definitions
212        above, if the number is reached, the waiting-time will be denied
219 	dev_info(&chip->dev, "Granting WTX (%02d / %02d)\n",  in tpm_wtx()
230 	dev_info(&chip->dev, "Aborting WTX\n");  in tpm_wtx_abort()
251 			return -EIO;  in tpm_inf_recv()
256 		dev_err(&chip->dev,  in tpm_inf_recv()
258 		return -EIO;  in tpm_inf_recv()
271 			dev_err(&chip->dev, "Error handling on vendor layer!\n");  in tpm_inf_recv()
272 			return -EIO;  in tpm_inf_recv()
278 		size = size - 6;  in tpm_inf_recv()
283 		dev_info(&chip->dev, "WTX-package received\n");  in tpm_inf_recv()
294 		dev_info(&chip->dev, "WTX-abort acknowledged\n");  in tpm_inf_recv()
299 		dev_err(&chip->dev, "ERROR-package received:\n");  in tpm_inf_recv()
301 			dev_err(&chip->dev,  in tpm_inf_recv()
302 				"-> Negative acknowledgement"  in tpm_inf_recv()
303 				" - retransmit command!\n");  in tpm_inf_recv()
304 		return -EIO;  in tpm_inf_recv()
306 	return -EIO;  in tpm_inf_recv()
320 		dev_err(&chip->dev, "Timeout while clearing FIFO\n");  in tpm_inf_send()
321 		return -EIO;  in tpm_inf_send()
326 		return -EIO;  in tpm_inf_send()
399 	/* read IO-ports through PnP */  in tpm_inf_pnp_probe()
410 			rc = -EINVAL;  in tpm_inf_pnp_probe()
413 		dev_info(&dev->dev, "Found %s with ID %s\n",  in tpm_inf_pnp_probe()
414 			 dev->name, dev_id->id);  in tpm_inf_pnp_probe()
416 			rc = -EINVAL;  in tpm_inf_pnp_probe()
422 			rc = -EINVAL;  in tpm_inf_pnp_probe()
428 			rc = -EINVAL;  in tpm_inf_pnp_probe()
439 		dev_info(&dev->dev, "Found %s with ID %s\n",  in tpm_inf_pnp_probe()
440 			 dev->name, dev_id->id);  in tpm_inf_pnp_probe()
445 			rc = -EINVAL;  in tpm_inf_pnp_probe()
452 			rc = -EINVAL;  in tpm_inf_pnp_probe()
458 		 * a single large mem region with the device config  in tpm_inf_pnp_probe()
466 		rc = -EINVAL;  in tpm_inf_pnp_probe()
487 		chipname = " (SLD 9630 TT 1.1)";  in tpm_inf_pnp_probe()
490 		chipname = " (SLB 9635 TT 1.2)";  in tpm_inf_pnp_probe()
499 		/* configure TPM with IO-ports */  in tpm_inf_pnp_probe()
505 		/* control if IO-ports are set correctly */  in tpm_inf_pnp_probe()
512 			dev_err(&dev->dev,  in tpm_inf_pnp_probe()
513 				"Could not set IO-data registers to 0x%x\n",  in tpm_inf_pnp_probe()
515 			rc = -EIO;  in tpm_inf_pnp_probe()
528 		dev_info(&dev->dev, "TPM found: "  in tpm_inf_pnp_probe()
545 		chip = tpmm_chip_alloc(&dev->dev, &tpm_inf);  in tpm_inf_pnp_probe()
557 		rc = -ENODEV;  in tpm_inf_pnp_probe()
593 	/* Re-configure TPM after suspending */  in tpm_inf_resume()
623 MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");