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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 | /* * Copyright (C) 2004 IBM Corporation * * Authors: * Leendert van Doorn <leendert@watson.ibm.com> * Dave Safford <safford@watson.ibm.com> * Reiner Sailer <sailer@watson.ibm.com> * Kylene Hall <kjhall@us.ibm.com> * * Maintained by: <tpmdd_devel@lists.sourceforge.net> * * Device driver for TCG/TCPA TPM (trusted platform module). * Specifications at www.trustedcomputinggroup.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation, version 2 of the * License. * */ #include <linux/module.h> #include <linux/pci.h> #include <linux/delay.h> #include <linux/fs.h> #include <linux/miscdevice.h> #include <linux/platform_device.h> enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ }; /* TPM addresses */ enum tpm_addr { TPM_SUPERIO_ADDR = 0x2E, TPM_ADDR = 0x4E, }; extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr, char *); extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr, const char *, size_t); struct tpm_chip; struct tpm_vendor_specific { u8 req_complete_mask; u8 req_complete_val; u8 req_canceled; void __iomem *iobase; /* ioremapped address */ unsigned long base; /* TPM base address */ int region_size; int have_region; int (*recv) (struct tpm_chip *, u8 *, size_t); int (*send) (struct tpm_chip *, u8 *, size_t); void (*cancel) (struct tpm_chip *); u8 (*status) (struct tpm_chip *); struct miscdevice miscdev; struct attribute_group *attr_group; }; struct tpm_chip { struct device *dev; /* Device stuff */ int dev_num; /* /dev/tpm# */ int num_opens; /* only one allowed */ int time_expired; /* Data passed to and from the tpm via the read/write calls */ u8 *data_buffer; atomic_t data_pending; struct semaphore buffer_mutex; struct timer_list user_read_timer; /* user needs to claim result */ struct work_struct work; struct semaphore tpm_mutex; /* tpm is processing */ struct tpm_vendor_specific *vendor; struct list_head list; }; static inline int tpm_read_index(int base, int index) { outb(index, base); return inb(base+1) & 0xFF; } static inline void tpm_write_index(int base, int index, int value) { outb(index, base); outb(value & 0xFF, base+1); } extern int tpm_register_hardware(struct device *, struct tpm_vendor_specific *); extern int tpm_open(struct inode *, struct file *); extern int tpm_release(struct inode *, struct file *); extern ssize_t tpm_write(struct file *, const char __user *, size_t, loff_t *); extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *); extern void tpm_remove_hardware(struct device *); extern int tpm_pm_suspend(struct device *, pm_message_t); extern int tpm_pm_resume(struct device *); |