![Linus Torvalds](/assets/img/avatar_default.png)
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
217 lines
5.2 KiB
C
217 lines
5.2 KiB
C
/*
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* Copyright (C) 2004 IBM Corporation
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*
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd_devel@lists.sourceforge.net>
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*
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*
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*/
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#include "tpm.h"
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/* Atmel definitions */
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#define TPM_ATML_BASE 0x400
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/* write status bits */
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#define ATML_STATUS_ABORT 0x01
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#define ATML_STATUS_LASTBYTE 0x04
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/* read status bits */
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#define ATML_STATUS_BUSY 0x01
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#define ATML_STATUS_DATA_AVAIL 0x02
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#define ATML_STATUS_REWRITE 0x04
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static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
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{
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u8 status, *hdr = buf;
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u32 size;
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int i;
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__be32 *native_size;
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/* start reading header */
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if (count < 6)
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return -EIO;
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for (i = 0; i < 6; i++) {
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status = inb(chip->vendor->base + 1);
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if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
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dev_err(&chip->pci_dev->dev,
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"error reading header\n");
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return -EIO;
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}
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*buf++ = inb(chip->vendor->base);
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}
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/* size of the data received */
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native_size = (__force __be32 *) (hdr + 2);
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size = be32_to_cpu(*native_size);
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if (count < size) {
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dev_err(&chip->pci_dev->dev,
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"Recv size(%d) less than available space\n", size);
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for (; i < size; i++) { /* clear the waiting data anyway */
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status = inb(chip->vendor->base + 1);
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if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
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dev_err(&chip->pci_dev->dev,
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"error reading data\n");
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return -EIO;
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}
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}
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return -EIO;
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}
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/* read all the data available */
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for (; i < size; i++) {
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status = inb(chip->vendor->base + 1);
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if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
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dev_err(&chip->pci_dev->dev,
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"error reading data\n");
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return -EIO;
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}
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*buf++ = inb(chip->vendor->base);
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}
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/* make sure data available is gone */
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status = inb(chip->vendor->base + 1);
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if (status & ATML_STATUS_DATA_AVAIL) {
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dev_err(&chip->pci_dev->dev, "data available is stuck\n");
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return -EIO;
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}
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return size;
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}
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static int tpm_atml_send(struct tpm_chip *chip, u8 * buf, size_t count)
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{
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int i;
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dev_dbg(&chip->pci_dev->dev, "tpm_atml_send: ");
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for (i = 0; i < count; i++) {
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dev_dbg(&chip->pci_dev->dev, "0x%x(%d) ", buf[i], buf[i]);
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outb(buf[i], chip->vendor->base);
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}
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return count;
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}
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static void tpm_atml_cancel(struct tpm_chip *chip)
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{
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outb(ATML_STATUS_ABORT, chip->vendor->base + 1);
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}
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static struct file_operations atmel_ops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.open = tpm_open,
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.read = tpm_read,
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.write = tpm_write,
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.release = tpm_release,
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};
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static struct tpm_vendor_specific tpm_atmel = {
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.recv = tpm_atml_recv,
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.send = tpm_atml_send,
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.cancel = tpm_atml_cancel,
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.req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
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.req_complete_val = ATML_STATUS_DATA_AVAIL,
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.base = TPM_ATML_BASE,
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.miscdev = { .fops = &atmel_ops, },
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};
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static int __devinit tpm_atml_init(struct pci_dev *pci_dev,
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const struct pci_device_id *pci_id)
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{
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u8 version[4];
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int rc = 0;
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if (pci_enable_device(pci_dev))
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return -EIO;
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if (tpm_lpc_bus_init(pci_dev, TPM_ATML_BASE)) {
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rc = -ENODEV;
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goto out_err;
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}
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/* verify that it is an Atmel part */
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if (tpm_read_index(4) != 'A' || tpm_read_index(5) != 'T'
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|| tpm_read_index(6) != 'M' || tpm_read_index(7) != 'L') {
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rc = -ENODEV;
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goto out_err;
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}
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/* query chip for its version number */
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if ((version[0] = tpm_read_index(0x00)) != 0xFF) {
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version[1] = tpm_read_index(0x01);
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version[2] = tpm_read_index(0x02);
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version[3] = tpm_read_index(0x03);
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} else {
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dev_info(&pci_dev->dev, "version query failed\n");
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rc = -ENODEV;
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goto out_err;
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}
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if ((rc = tpm_register_hardware(pci_dev, &tpm_atmel)) < 0)
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goto out_err;
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dev_info(&pci_dev->dev,
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"Atmel TPM version %d.%d.%d.%d\n", version[0], version[1],
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version[2], version[3]);
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return 0;
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out_err:
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pci_disable_device(pci_dev);
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return rc;
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}
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static struct pci_device_id tpm_pci_tbl[] __devinitdata = {
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12)},
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{PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0)},
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{PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
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{0,}
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};
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MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
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static struct pci_driver atmel_pci_driver = {
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.name = "tpm_atmel",
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.id_table = tpm_pci_tbl,
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.probe = tpm_atml_init,
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.remove = __devexit_p(tpm_remove),
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.suspend = tpm_pm_suspend,
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.resume = tpm_pm_resume,
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};
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static int __init init_atmel(void)
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{
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return pci_register_driver(&atmel_pci_driver);
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}
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static void __exit cleanup_atmel(void)
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{
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pci_unregister_driver(&atmel_pci_driver);
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}
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module_init(init_atmel);
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module_exit(cleanup_atmel);
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MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
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MODULE_DESCRIPTION("TPM Driver");
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MODULE_VERSION("2.0");
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MODULE_LICENSE("GPL");
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