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https://github.com/torvalds/linux
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daacdfa6e7
This patch is work to support new National TPMs that problems were reported with on Thinkpad T43 and Thinkcentre S51. Thanks to Jens and Gang for their debugging work on these issues. Signed-off-by: Kylene Hall <kjhall@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
104 lines
2.8 KiB
C
104 lines
2.8 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 <linux/module.h>
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#include <linux/version.h>
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#include <linux/pci.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/miscdevice.h>
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enum tpm_timeout {
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TPM_TIMEOUT = 5, /* msecs */
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};
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/* TPM addresses */
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enum tpm_addr {
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TPM_SUPERIO_ADDR = 0x2E,
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TPM_ADDR = 0x4E,
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};
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extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
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const char *, size_t);
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struct tpm_chip;
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struct tpm_vendor_specific {
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u8 req_complete_mask;
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u8 req_complete_val;
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u8 req_canceled;
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u16 base; /* TPM base address */
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int (*recv) (struct tpm_chip *, u8 *, size_t);
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int (*send) (struct tpm_chip *, u8 *, size_t);
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void (*cancel) (struct tpm_chip *);
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struct miscdevice miscdev;
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struct attribute_group *attr_group;
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};
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struct tpm_chip {
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struct pci_dev *pci_dev; /* PCI device stuff */
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int dev_num; /* /dev/tpm# */
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int num_opens; /* only one allowed */
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int time_expired;
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/* Data passed to and from the tpm via the read/write calls */
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u8 *data_buffer;
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atomic_t data_pending;
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struct semaphore buffer_mutex;
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struct timer_list user_read_timer; /* user needs to claim result */
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struct semaphore tpm_mutex; /* tpm is processing */
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struct tpm_vendor_specific *vendor;
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struct list_head list;
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};
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static inline int tpm_read_index(int base, int index)
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{
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outb(index, base);
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return inb(base+1) & 0xFF;
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}
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static inline void tpm_write_index(int base, int index, int value)
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{
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outb(index, base);
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outb(value & 0xFF, base+1);
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}
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extern int tpm_register_hardware(struct pci_dev *,
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struct tpm_vendor_specific *);
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extern int tpm_open(struct inode *, struct file *);
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extern int tpm_release(struct inode *, struct file *);
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extern ssize_t tpm_write(struct file *, const char __user *, size_t,
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loff_t *);
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extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
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extern void __devexit tpm_remove(struct pci_dev *);
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extern int tpm_pm_suspend(struct pci_dev *, pm_message_t);
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extern int tpm_pm_resume(struct pci_dev *);
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