6659ca2ab6
In the current driver all sysfs files end up owned by the base driver module rather than the module that actually owns the device this is a problem if the module is unloaded and the file is open. This patch fixes all that and lumps the files into an attribute_group. Signed-off-by: Kylene Hall <kjhall@us.ibm.com> Signed-off-by: Yani Ioannou <yani.ioannou@gmail.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
/*
|
|
* 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>
|
|
|
|
enum tpm_timeout {
|
|
TPM_TIMEOUT = 5, /* msecs */
|
|
};
|
|
|
|
/* TPM addresses */
|
|
enum tpm_addr {
|
|
TPM_ADDR = 0x4E,
|
|
TPM_DATA = 0x4F
|
|
};
|
|
|
|
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;
|
|
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 attribute_group *attr_group;
|
|
};
|
|
|
|
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 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 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 *, pm_message_t);
|
|
extern int tpm_pm_resume(struct pci_dev *);
|