11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (C) 2004 IBM Corporation 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Authors: 51da177e4SLinus Torvalds * Leendert van Doorn <leendert@watson.ibm.com> 61da177e4SLinus Torvalds * Dave Safford <safford@watson.ibm.com> 71da177e4SLinus Torvalds * Reiner Sailer <sailer@watson.ibm.com> 81da177e4SLinus Torvalds * Kylene Hall <kjhall@us.ibm.com> 91da177e4SLinus Torvalds * 108e81cc13SKent Yoder * Maintained by: <tpmdd-devel@lists.sourceforge.net> 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * Device driver for TCG/TCPA TPM (trusted platform module). 131da177e4SLinus Torvalds * Specifications at www.trustedcomputinggroup.org 141da177e4SLinus Torvalds * 151da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or 161da177e4SLinus Torvalds * modify it under the terms of the GNU General Public License as 171da177e4SLinus Torvalds * published by the Free Software Foundation, version 2 of the 181da177e4SLinus Torvalds * License. 191da177e4SLinus Torvalds * 201da177e4SLinus Torvalds */ 211da177e4SLinus Torvalds 22faba278fSChris Wright #include <linux/platform_device.h> 235a0e3ad6STejun Heo #include <linux/slab.h> 241da177e4SLinus Torvalds #include "tpm.h" 251da177e4SLinus Torvalds 261da177e4SLinus Torvalds /* National definitions */ 273122a88aSKylene Hall enum tpm_nsc_addr{ 28e1a23c66SKylene Hall TPM_NSC_IRQ = 0x07, 29e1a23c66SKylene Hall TPM_NSC_BASE0_HI = 0x60, 30e1a23c66SKylene Hall TPM_NSC_BASE0_LO = 0x61, 31e1a23c66SKylene Hall TPM_NSC_BASE1_HI = 0x62, 32e1a23c66SKylene Hall TPM_NSC_BASE1_LO = 0x63 333122a88aSKylene Hall }; 341da177e4SLinus Torvalds 353122a88aSKylene Hall enum tpm_nsc_index { 363122a88aSKylene Hall NSC_LDN_INDEX = 0x07, 373122a88aSKylene Hall NSC_SID_INDEX = 0x20, 383122a88aSKylene Hall NSC_LDC_INDEX = 0x30, 393122a88aSKylene Hall NSC_DIO_INDEX = 0x60, 403122a88aSKylene Hall NSC_CIO_INDEX = 0x62, 413122a88aSKylene Hall NSC_IRQ_INDEX = 0x70, 423122a88aSKylene Hall NSC_ITS_INDEX = 0x71 433122a88aSKylene Hall }; 441da177e4SLinus Torvalds 453122a88aSKylene Hall enum tpm_nsc_status_loc { 463122a88aSKylene Hall NSC_STATUS = 0x01, 473122a88aSKylene Hall NSC_COMMAND = 0x01, 483122a88aSKylene Hall NSC_DATA = 0x00 493122a88aSKylene Hall }; 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds /* status bits */ 523122a88aSKylene Hall enum tpm_nsc_status { 533122a88aSKylene Hall NSC_STATUS_OBF = 0x01, /* output buffer full */ 543122a88aSKylene Hall NSC_STATUS_IBF = 0x02, /* input buffer full */ 553122a88aSKylene Hall NSC_STATUS_F0 = 0x04, /* F0 */ 563122a88aSKylene Hall NSC_STATUS_A2 = 0x08, /* A2 */ 573122a88aSKylene Hall NSC_STATUS_RDY = 0x10, /* ready to receive command */ 583122a88aSKylene Hall NSC_STATUS_IBR = 0x20 /* ready to receive data */ 593122a88aSKylene Hall }; 60daacdfa6SKylene Jo Hall 611da177e4SLinus Torvalds /* command bits */ 623122a88aSKylene Hall enum tpm_nsc_cmd_mode { 633122a88aSKylene Hall NSC_COMMAND_NORMAL = 0x01, /* normal mode */ 643122a88aSKylene Hall NSC_COMMAND_EOC = 0x03, 653122a88aSKylene Hall NSC_COMMAND_CANCEL = 0x22 663122a88aSKylene Hall }; 671da177e4SLinus Torvalds /* 681da177e4SLinus Torvalds * Wait for a certain status to appear 691da177e4SLinus Torvalds */ 701da177e4SLinus Torvalds static int wait_for_stat(struct tpm_chip *chip, u8 mask, u8 val, u8 * data) 711da177e4SLinus Torvalds { 72700d8bdcSNishanth Aravamudan unsigned long stop; 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds /* status immediately available check */ 7590dda520SKylene Jo Hall *data = inb(chip->vendor.base + NSC_STATUS); 761da177e4SLinus Torvalds if ((*data & mask) == val) 771da177e4SLinus Torvalds return 0; 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds /* wait for status */ 80700d8bdcSNishanth Aravamudan stop = jiffies + 10 * HZ; 811da177e4SLinus Torvalds do { 82700d8bdcSNishanth Aravamudan msleep(TPM_TIMEOUT); 8390dda520SKylene Jo Hall *data = inb(chip->vendor.base + 1); 84700d8bdcSNishanth Aravamudan if ((*data & mask) == val) 851da177e4SLinus Torvalds return 0; 861da177e4SLinus Torvalds } 87700d8bdcSNishanth Aravamudan while (time_before(jiffies, stop)); 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds return -EBUSY; 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds static int nsc_wait_for_ready(struct tpm_chip *chip) 931da177e4SLinus Torvalds { 941da177e4SLinus Torvalds int status; 95700d8bdcSNishanth Aravamudan unsigned long stop; 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds /* status immediately available check */ 9890dda520SKylene Jo Hall status = inb(chip->vendor.base + NSC_STATUS); 991da177e4SLinus Torvalds if (status & NSC_STATUS_OBF) 10090dda520SKylene Jo Hall status = inb(chip->vendor.base + NSC_DATA); 1011da177e4SLinus Torvalds if (status & NSC_STATUS_RDY) 1021da177e4SLinus Torvalds return 0; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds /* wait for status */ 105700d8bdcSNishanth Aravamudan stop = jiffies + 100; 1061da177e4SLinus Torvalds do { 107700d8bdcSNishanth Aravamudan msleep(TPM_TIMEOUT); 10890dda520SKylene Jo Hall status = inb(chip->vendor.base + NSC_STATUS); 1091da177e4SLinus Torvalds if (status & NSC_STATUS_OBF) 11090dda520SKylene Jo Hall status = inb(chip->vendor.base + NSC_DATA); 111700d8bdcSNishanth Aravamudan if (status & NSC_STATUS_RDY) 1121da177e4SLinus Torvalds return 0; 1131da177e4SLinus Torvalds } 114700d8bdcSNishanth Aravamudan while (time_before(jiffies, stop)); 1151da177e4SLinus Torvalds 116*8cfffc9dSJason Gunthorpe dev_info(&chip->dev, "wait for ready failed\n"); 1171da177e4SLinus Torvalds return -EBUSY; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds static int tpm_nsc_recv(struct tpm_chip *chip, u8 * buf, size_t count) 1221da177e4SLinus Torvalds { 1231da177e4SLinus Torvalds u8 *buffer = buf; 1241da177e4SLinus Torvalds u8 data, *p; 1251da177e4SLinus Torvalds u32 size; 1261da177e4SLinus Torvalds __be32 *native_size; 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds if (count < 6) 1291da177e4SLinus Torvalds return -EIO; 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds if (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0) { 132*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "F0 timeout\n"); 1331da177e4SLinus Torvalds return -EIO; 1341da177e4SLinus Torvalds } 1351da177e4SLinus Torvalds if ((data = 13690dda520SKylene Jo Hall inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_NORMAL) { 137*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "not in normal mode (0x%x)\n", 1381da177e4SLinus Torvalds data); 1391da177e4SLinus Torvalds return -EIO; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds /* read the whole packet */ 1431da177e4SLinus Torvalds for (p = buffer; p < &buffer[count]; p++) { 1441da177e4SLinus Torvalds if (wait_for_stat 1451da177e4SLinus Torvalds (chip, NSC_STATUS_OBF, NSC_STATUS_OBF, &data) < 0) { 146*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, 1471da177e4SLinus Torvalds "OBF timeout (while reading data)\n"); 1481da177e4SLinus Torvalds return -EIO; 1491da177e4SLinus Torvalds } 1501da177e4SLinus Torvalds if (data & NSC_STATUS_F0) 1511da177e4SLinus Torvalds break; 15290dda520SKylene Jo Hall *p = inb(chip->vendor.base + NSC_DATA); 1531da177e4SLinus Torvalds } 1541da177e4SLinus Torvalds 155daacdfa6SKylene Jo Hall if ((data & NSC_STATUS_F0) == 0 && 156daacdfa6SKylene Jo Hall (wait_for_stat(chip, NSC_STATUS_F0, NSC_STATUS_F0, &data) < 0)) { 157*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "F0 not set\n"); 1581da177e4SLinus Torvalds return -EIO; 1591da177e4SLinus Torvalds } 16090dda520SKylene Jo Hall if ((data = inb(chip->vendor.base + NSC_DATA)) != NSC_COMMAND_EOC) { 161*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, 1621da177e4SLinus Torvalds "expected end of command(0x%x)\n", data); 1631da177e4SLinus Torvalds return -EIO; 1641da177e4SLinus Torvalds } 1651da177e4SLinus Torvalds 1661da177e4SLinus Torvalds native_size = (__force __be32 *) (buf + 2); 1671da177e4SLinus Torvalds size = be32_to_cpu(*native_size); 1681da177e4SLinus Torvalds 1691da177e4SLinus Torvalds if (count < size) 1701da177e4SLinus Torvalds return -EIO; 1711da177e4SLinus Torvalds 1721da177e4SLinus Torvalds return size; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds 1751da177e4SLinus Torvalds static int tpm_nsc_send(struct tpm_chip *chip, u8 * buf, size_t count) 1761da177e4SLinus Torvalds { 1771da177e4SLinus Torvalds u8 data; 1781da177e4SLinus Torvalds int i; 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds /* 1811da177e4SLinus Torvalds * If we hit the chip with back to back commands it locks up 1821da177e4SLinus Torvalds * and never set IBF. Hitting it with this "hammer" seems to 1831da177e4SLinus Torvalds * fix it. Not sure why this is needed, we followed the flow 1841da177e4SLinus Torvalds * chart in the manual to the letter. 1851da177e4SLinus Torvalds */ 18690dda520SKylene Jo Hall outb(NSC_COMMAND_CANCEL, chip->vendor.base + NSC_COMMAND); 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds if (nsc_wait_for_ready(chip) != 0) 1891da177e4SLinus Torvalds return -EIO; 1901da177e4SLinus Torvalds 1911da177e4SLinus Torvalds if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) { 192*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "IBF timeout\n"); 1931da177e4SLinus Torvalds return -EIO; 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds 19690dda520SKylene Jo Hall outb(NSC_COMMAND_NORMAL, chip->vendor.base + NSC_COMMAND); 1971da177e4SLinus Torvalds if (wait_for_stat(chip, NSC_STATUS_IBR, NSC_STATUS_IBR, &data) < 0) { 198*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "IBR timeout\n"); 1991da177e4SLinus Torvalds return -EIO; 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds 2021da177e4SLinus Torvalds for (i = 0; i < count; i++) { 2031da177e4SLinus Torvalds if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) { 204*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, 2051da177e4SLinus Torvalds "IBF timeout (while writing data)\n"); 2061da177e4SLinus Torvalds return -EIO; 2071da177e4SLinus Torvalds } 20890dda520SKylene Jo Hall outb(buf[i], chip->vendor.base + NSC_DATA); 2091da177e4SLinus Torvalds } 2101da177e4SLinus Torvalds 2111da177e4SLinus Torvalds if (wait_for_stat(chip, NSC_STATUS_IBF, 0, &data) < 0) { 212*8cfffc9dSJason Gunthorpe dev_err(&chip->dev, "IBF timeout\n"); 2131da177e4SLinus Torvalds return -EIO; 2141da177e4SLinus Torvalds } 21590dda520SKylene Jo Hall outb(NSC_COMMAND_EOC, chip->vendor.base + NSC_COMMAND); 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds return count; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds static void tpm_nsc_cancel(struct tpm_chip *chip) 2211da177e4SLinus Torvalds { 22290dda520SKylene Jo Hall outb(NSC_COMMAND_CANCEL, chip->vendor.base + NSC_COMMAND); 2231da177e4SLinus Torvalds } 2241da177e4SLinus Torvalds 225b4ed3e3cSKylene Jo Hall static u8 tpm_nsc_status(struct tpm_chip *chip) 226b4ed3e3cSKylene Jo Hall { 22790dda520SKylene Jo Hall return inb(chip->vendor.base + NSC_STATUS); 228b4ed3e3cSKylene Jo Hall } 229b4ed3e3cSKylene Jo Hall 2301f866057SStefan Berger static bool tpm_nsc_req_canceled(struct tpm_chip *chip, u8 status) 2311f866057SStefan Berger { 2321f866057SStefan Berger return (status == NSC_STATUS_RDY); 2331f866057SStefan Berger } 2341f866057SStefan Berger 23501ad1fa7SJason Gunthorpe static const struct tpm_class_ops tpm_nsc = { 2361da177e4SLinus Torvalds .recv = tpm_nsc_recv, 2371da177e4SLinus Torvalds .send = tpm_nsc_send, 2381da177e4SLinus Torvalds .cancel = tpm_nsc_cancel, 239b4ed3e3cSKylene Jo Hall .status = tpm_nsc_status, 2401da177e4SLinus Torvalds .req_complete_mask = NSC_STATUS_OBF, 2411da177e4SLinus Torvalds .req_complete_val = NSC_STATUS_OBF, 2421f866057SStefan Berger .req_canceled = tpm_nsc_req_canceled, 2431da177e4SLinus Torvalds }; 2441da177e4SLinus Torvalds 245570302a3SKylene Jo Hall static struct platform_device *pdev = NULL; 246570302a3SKylene Jo Hall 2474821cd11SSam Ravnborg static void tpm_nsc_remove(struct device *dev) 248570302a3SKylene Jo Hall { 249570302a3SKylene Jo Hall struct tpm_chip *chip = dev_get_drvdata(dev); 250afb5abc2SJarkko Sakkinen 251afb5abc2SJarkko Sakkinen tpm_chip_unregister(chip); 25290dda520SKylene Jo Hall release_region(chip->vendor.base, 2); 253570302a3SKylene Jo Hall } 254570302a3SKylene Jo Hall 255ca9a2054SRafael J. Wysocki static SIMPLE_DEV_PM_OPS(tpm_nsc_pm, tpm_pm_suspend, tpm_pm_resume); 25609f50c95SDavid Smith 25709f50c95SDavid Smith static struct platform_driver nsc_drv = { 25809f50c95SDavid Smith .driver = { 259570302a3SKylene Jo Hall .name = "tpm_nsc", 260ca9a2054SRafael J. Wysocki .pm = &tpm_nsc_pm, 26109f50c95SDavid Smith }, 262570302a3SKylene Jo Hall }; 263570302a3SKylene Jo Hall 264570302a3SKylene Jo Hall static int __init init_nsc(void) 2651da177e4SLinus Torvalds { 2661da177e4SLinus Torvalds int rc = 0; 267f33d9bd5SJeff Garzik int lo, hi, err; 268daacdfa6SKylene Jo Hall int nscAddrBase = TPM_ADDR; 269e0dd03caSKylene Jo Hall struct tpm_chip *chip; 270e0dd03caSKylene Jo Hall unsigned long base; 271daacdfa6SKylene Jo Hall 2721da177e4SLinus Torvalds /* verify that it is a National part (SID) */ 273daacdfa6SKylene Jo Hall if (tpm_read_index(TPM_ADDR, NSC_SID_INDEX) != 0xEF) { 274daacdfa6SKylene Jo Hall nscAddrBase = (tpm_read_index(TPM_SUPERIO_ADDR, 0x2C)<<8)| 275daacdfa6SKylene Jo Hall (tpm_read_index(TPM_SUPERIO_ADDR, 0x2B)&0xFE); 276570302a3SKylene Jo Hall if (tpm_read_index(nscAddrBase, NSC_SID_INDEX) != 0xF6) 277570302a3SKylene Jo Hall return -ENODEV; 278daacdfa6SKylene Jo Hall } 279daacdfa6SKylene Jo Hall 28009f50c95SDavid Smith err = platform_driver_register(&nsc_drv); 281f33d9bd5SJeff Garzik if (err) 282f33d9bd5SJeff Garzik return err; 283e2a8f7a1SKylene Jo Hall 284daacdfa6SKylene Jo Hall hi = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_HI); 285daacdfa6SKylene Jo Hall lo = tpm_read_index(nscAddrBase, TPM_NSC_BASE0_LO); 286e0dd03caSKylene Jo Hall base = (hi<<8) | lo; 2871da177e4SLinus Torvalds 288570302a3SKylene Jo Hall /* enable the DPM module */ 289570302a3SKylene Jo Hall tpm_write_index(nscAddrBase, NSC_LDC_INDEX, 0x01); 290570302a3SKylene Jo Hall 29109f50c95SDavid Smith pdev = platform_device_alloc("tpm_nscl0", -1); 292e2a8f7a1SKylene Jo Hall if (!pdev) { 293e2a8f7a1SKylene Jo Hall rc = -ENOMEM; 294e2a8f7a1SKylene Jo Hall goto err_unreg_drv; 295e2a8f7a1SKylene Jo Hall } 296570302a3SKylene Jo Hall 297570302a3SKylene Jo Hall pdev->num_resources = 0; 29809f50c95SDavid Smith pdev->dev.driver = &nsc_drv.driver; 299570302a3SKylene Jo Hall pdev->dev.release = tpm_nsc_remove; 300570302a3SKylene Jo Hall 30129412f0fSStefan Berger if ((rc = platform_device_add(pdev)) < 0) 30229412f0fSStefan Berger goto err_put_dev; 303570302a3SKylene Jo Hall 304e0dd03caSKylene Jo Hall if (request_region(base, 2, "tpm_nsc0") == NULL ) { 305e2a8f7a1SKylene Jo Hall rc = -EBUSY; 30629412f0fSStefan Berger goto err_del_dev; 307570302a3SKylene Jo Hall } 308570302a3SKylene Jo Hall 309afb5abc2SJarkko Sakkinen chip = tpmm_chip_alloc(&pdev->dev, &tpm_nsc); 310afb5abc2SJarkko Sakkinen if (IS_ERR(chip)) { 311e0dd03caSKylene Jo Hall rc = -ENODEV; 312e2a8f7a1SKylene Jo Hall goto err_rel_reg; 313e0dd03caSKylene Jo Hall } 314570302a3SKylene Jo Hall 315afb5abc2SJarkko Sakkinen rc = tpm_chip_register(chip); 316afb5abc2SJarkko Sakkinen if (rc) 317afb5abc2SJarkko Sakkinen goto err_rel_reg; 318afb5abc2SJarkko Sakkinen 319570302a3SKylene Jo Hall dev_dbg(&pdev->dev, "NSC TPM detected\n"); 320570302a3SKylene Jo Hall dev_dbg(&pdev->dev, 3211da177e4SLinus Torvalds "NSC LDN 0x%x, SID 0x%x, SRID 0x%x\n", 322daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x07), tpm_read_index(nscAddrBase,0x20), 323daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x27)); 324570302a3SKylene Jo Hall dev_dbg(&pdev->dev, 3251da177e4SLinus Torvalds "NSC SIOCF1 0x%x SIOCF5 0x%x SIOCF6 0x%x SIOCF8 0x%x\n", 326daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x21), tpm_read_index(nscAddrBase,0x25), 327daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x26), tpm_read_index(nscAddrBase,0x28)); 328570302a3SKylene Jo Hall dev_dbg(&pdev->dev, "NSC IO Base0 0x%x\n", 329daacdfa6SKylene Jo Hall (tpm_read_index(nscAddrBase,0x60) << 8) | tpm_read_index(nscAddrBase,0x61)); 330570302a3SKylene Jo Hall dev_dbg(&pdev->dev, "NSC IO Base1 0x%x\n", 331daacdfa6SKylene Jo Hall (tpm_read_index(nscAddrBase,0x62) << 8) | tpm_read_index(nscAddrBase,0x63)); 332570302a3SKylene Jo Hall dev_dbg(&pdev->dev, "NSC Interrupt number and wakeup 0x%x\n", 333daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x70)); 334570302a3SKylene Jo Hall dev_dbg(&pdev->dev, "NSC IRQ type select 0x%x\n", 335daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x71)); 336570302a3SKylene Jo Hall dev_dbg(&pdev->dev, 3371da177e4SLinus Torvalds "NSC DMA channel select0 0x%x, select1 0x%x\n", 338daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0x74), tpm_read_index(nscAddrBase,0x75)); 339570302a3SKylene Jo Hall dev_dbg(&pdev->dev, 3401da177e4SLinus Torvalds "NSC Config " 3411da177e4SLinus Torvalds "0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", 342daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0xF0), tpm_read_index(nscAddrBase,0xF1), 343daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0xF2), tpm_read_index(nscAddrBase,0xF3), 344daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0xF4), tpm_read_index(nscAddrBase,0xF5), 345daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0xF6), tpm_read_index(nscAddrBase,0xF7), 346daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase,0xF8), tpm_read_index(nscAddrBase,0xF9)); 3471da177e4SLinus Torvalds 348570302a3SKylene Jo Hall dev_info(&pdev->dev, 349daacdfa6SKylene Jo Hall "NSC TPM revision %d\n", 350daacdfa6SKylene Jo Hall tpm_read_index(nscAddrBase, 0x27) & 0x1F); 3511da177e4SLinus Torvalds 352e0dd03caSKylene Jo Hall chip->vendor.base = base; 353e0dd03caSKylene Jo Hall 3541da177e4SLinus Torvalds return 0; 355e2a8f7a1SKylene Jo Hall 356e2a8f7a1SKylene Jo Hall err_rel_reg: 357e0dd03caSKylene Jo Hall release_region(base, 2); 35829412f0fSStefan Berger err_del_dev: 35929412f0fSStefan Berger platform_device_del(pdev); 36029412f0fSStefan Berger err_put_dev: 36129412f0fSStefan Berger platform_device_put(pdev); 362e2a8f7a1SKylene Jo Hall err_unreg_drv: 36309f50c95SDavid Smith platform_driver_unregister(&nsc_drv); 364e2a8f7a1SKylene Jo Hall return rc; 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds 3671da177e4SLinus Torvalds static void __exit cleanup_nsc(void) 3681da177e4SLinus Torvalds { 369570302a3SKylene Jo Hall if (pdev) { 370570302a3SKylene Jo Hall tpm_nsc_remove(&pdev->dev); 371570302a3SKylene Jo Hall platform_device_unregister(pdev); 372570302a3SKylene Jo Hall } 373570302a3SKylene Jo Hall 37409f50c95SDavid Smith platform_driver_unregister(&nsc_drv); 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds module_init(init_nsc); 3781da177e4SLinus Torvalds module_exit(cleanup_nsc); 3791da177e4SLinus Torvalds 3801da177e4SLinus Torvalds MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)"); 3811da177e4SLinus Torvalds MODULE_DESCRIPTION("TPM Driver"); 3821da177e4SLinus Torvalds MODULE_VERSION("2.0"); 3831da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 384