drivers/tpm/tpm_tis_st33zp24_spi.c

2  * STMicroelectronics TPM ST33ZP24 SPI UBOOT driver
6  * Description: Device driver for ST33ZP24 SPI TPM TCG.
8  * This device driver implements the TPM interface as defined in
9  * the TCG TPM Interface Spec version 1.21, revision 1.0 and the
19 #include <tpm.h>
58  * TPM command can be up to 2048 byte, A TPM response can be up to
65  * 2048 (for the TPM command) + 1024 (for the TPM answer).  We need
105  * Send byte to TPM register according to the ST33ZP24 SPI protocol.
106  * @param: tpm, the chip description
107  * @param: tpm_register, the tpm tis register where the data should be written
156  * @param: tpm, the chip description
158  * @param: tpm_register, the tpm tis register where the data should be read
159  * @param: tpm_data, the TPM response
160  * @param: tpm_size, tpm TPM response size to read.
203  * @param: tpm_register, the tpm tis register where the data should be read
204  * @param: tpm_data, the TPM response
205  * @param: tpm_size, tpm TPM response size to read.
242  * @param: chip, the tpm chip description.
253  * @param: chip, the tpm chip description
272  * st33zp24_spi_request_locality request the TPM locality
305  * @param: chip, the tpm chip description
367  * @param: chip, the tpm chip description
371  * @return: the tpm status, 0 if success, -ETIME if timeout is reached.
397  * @param: chip, the tpm chip description
400  * @return: the number of bytes read from TPM FIFO.
424  * st33zp24_spi_recv received TPM response through TPM phy.
445 		debug("TPM error, unable to read header\n");  in st33zp24_spi_recv()
458 		debug("TPM error, unable to read remaining bytes of result\n");  in st33zp24_spi_recv()
471  * st33zp24_spi_send send TPM commands through TPM phy.
550 	 * The TPM needs some time to clean up here,  in st33zp24_spi_cleanup()
579 	 * A timeout query to TPM can be placed here.  in st33zp24_spi_init()
622 	return snprintf(buf, size, "1.2 TPM (%s, chip type %s device-id 0x%x)",  in st33zp24_spi_get_desc()
646 	debug("ST33ZP24 SPI TPM from STMicroelectronics found\n");  in st33zp24_spi_probe()