projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Copyright (C) 2004 IBM Corporation | |
| 3 | * | |
| 4 | * Authors: | |
| 5 | * Leendert van Doorn <leendert@watson.ibm.com> | |
| 6 | * Dave Safford <safford@watson.ibm.com> | |
| 7 | * Reiner Sailer <sailer@watson.ibm.com> | |
| 8 | * Kylene Hall <kjhall@us.ibm.com> | |
| 9 | * | |
| 10 | * Maintained by: <tpmdd_devel@lists.sourceforge.net> | |
| 11 | * | |
| 12 | * Device driver for TCG/TCPA TPM (trusted platform module). | |
| 13 | * Specifications at www.trustedcomputinggroup.org | |
| 14 | * | |
| 15 | * This program is free software; you can redistribute it and/or | |
| 16 | * modify it under the terms of the GNU General Public License as | |
| 17 | * published by the Free Software Foundation, version 2 of the | |
| 18 | * License. | |
| 19 | * | |
| 20 | */ | |
| 21 | #include <linux/module.h> | |
| 22 | #include <linux/version.h> | |
| 23 | #include <linux/pci.h> | |
| 24 | #include <linux/delay.h> | |
| 25 | #include <linux/fs.h> | |
| 26 | #include <linux/miscdevice.h> | |
| 27 | ||
| 700d8bdc | 28 | #define TPM_TIMEOUT 5 /* msecs */ |
| 1da177e4 LT |
29 | |
| 30 | /* TPM addresses */ | |
| 31 | #define TPM_ADDR 0x4E | |
| 32 | #define TPM_DATA 0x4F | |
| 33 | ||
| 34 | struct tpm_chip; | |
| 35 | ||
| 36 | struct tpm_vendor_specific { | |
| 37 | u8 req_complete_mask; | |
| 38 | u8 req_complete_val; | |
| 39 | u16 base; /* TPM base address */ | |
| 40 | ||
| 41 | int (*recv) (struct tpm_chip *, u8 *, size_t); | |
| 42 | int (*send) (struct tpm_chip *, u8 *, size_t); | |
| 43 | void (*cancel) (struct tpm_chip *); | |
| 44 | struct miscdevice miscdev; | |
| 45 | }; | |
| 46 | ||
| 47 | struct tpm_chip { | |
| 48 | struct pci_dev *pci_dev; /* PCI device stuff */ | |
| 49 | ||
| 50 | int dev_num; /* /dev/tpm# */ | |
| 51 | int num_opens; /* only one allowed */ | |
| 52 | int time_expired; | |
| 53 | ||
| 54 | /* Data passed to and from the tpm via the read/write calls */ | |
| 55 | u8 *data_buffer; | |
| 56 | atomic_t data_pending; | |
| 57 | struct semaphore buffer_mutex; | |
| 58 | ||
| 59 | struct timer_list user_read_timer; /* user needs to claim result */ | |
| 60 | struct semaphore tpm_mutex; /* tpm is processing */ | |
| 61 | struct timer_list device_timer; /* tpm is processing */ | |
| 62 | struct semaphore timer_manipulation_mutex; | |
| 63 | ||
| 64 | struct tpm_vendor_specific *vendor; | |
| 65 | ||
| 66 | struct list_head list; | |
| 67 | }; | |
| 68 | ||
| 69 | static inline int tpm_read_index(int index) | |
| 70 | { | |
| 71 | outb(index, TPM_ADDR); | |
| 72 | return inb(TPM_DATA) & 0xFF; | |
| 73 | } | |
| 74 | ||
| 75 | static inline void tpm_write_index(int index, int value) | |
| 76 | { | |
| 77 | outb(index, TPM_ADDR); | |
| 78 | outb(value & 0xFF, TPM_DATA); | |
| 79 | } | |
| 80 | ||
| 1da177e4 LT |
81 | extern int tpm_lpc_bus_init(struct pci_dev *, u16); |
| 82 | ||
| 83 | extern int tpm_register_hardware(struct pci_dev *, | |
| 84 | struct tpm_vendor_specific *); | |
| 85 | extern int tpm_open(struct inode *, struct file *); | |
| 86 | extern int tpm_release(struct inode *, struct file *); | |
| 87 | extern ssize_t tpm_write(struct file *, const char __user *, size_t, | |
| 88 | loff_t *); | |
| 89 | extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); | |
| 90 | extern void __devexit tpm_remove(struct pci_dev *); | |
| 4fd416c1 | 91 | extern int tpm_pm_suspend(struct pci_dev *, pm_message_t); |
| 1da177e4 | 92 | extern int tpm_pm_resume(struct pci_dev *); |