diff options
Diffstat (limited to 'drivers/char/tpm/tpm.h')
| -rw-r--r-- | drivers/char/tpm/tpm.h | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h new file mode 100644 index 000000000000..575cf5aed41a --- /dev/null +++ b/drivers/char/tpm/tpm.h @@ -0,0 +1,93 @@ +/* + * 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/version.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/fs.h> +#include <linux/miscdevice.h> + +#define TPM_TIMEOUT msecs_to_jiffies(5) + +/* TPM addresses */ +#define TPM_ADDR 0x4E +#define TPM_DATA 0x4F + +struct tpm_chip; + +struct tpm_vendor_specific { + u8 req_complete_mask; + u8 req_complete_val; + u16 base; /* TPM base address */ + + int (*recv) (struct tpm_chip *, u8 *, size_t); + int (*send) (struct tpm_chip *, u8 *, size_t); + void (*cancel) (struct tpm_chip *); + struct miscdevice miscdev; +}; + +struct tpm_chip { + struct pci_dev *pci_dev; /* PCI 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 semaphore tpm_mutex; /* tpm is processing */ + struct timer_list device_timer; /* tpm is processing */ + struct semaphore timer_manipulation_mutex; + + struct tpm_vendor_specific *vendor; + + struct list_head list; +}; + +static inline int tpm_read_index(int index) +{ + outb(index, TPM_ADDR); + return inb(TPM_DATA) & 0xFF; +} + +static inline void tpm_write_index(int index, int value) +{ + outb(index, TPM_ADDR); + outb(value & 0xFF, TPM_DATA); +} + +extern void tpm_time_expired(unsigned long); +extern int tpm_lpc_bus_init(struct pci_dev *, u16); + +extern int tpm_register_hardware(struct pci_dev *, + 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 __devexit tpm_remove(struct pci_dev *); +extern int tpm_pm_suspend(struct pci_dev *, u32); +extern int tpm_pm_resume(struct pci_dev *); |