253115b71f
devices, so we implemented the .remove function for pnp ones. Since it's code is very similar to the one inside tpm_dev_release, we've created a helper function tpm_dev_vendor_release, which is called by both. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by: Rajiv Andrade <srajiv@linux.vnet.ibm.com> Cc: "Serge E. Hallyn" <serue@us.ibm.com> Cc: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: James Morris <jmorris@namei.org>
154 lines
4.4 KiB
C
154 lines
4.4 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/delay.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/sched.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/io.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_show_caps_1_2(struct device *, struct device_attribute *attr,
|
|
char *);
|
|
extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
|
|
const char *, size_t);
|
|
extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
|
|
char *);
|
|
extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
|
|
char *);
|
|
extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
|
|
char *);
|
|
extern ssize_t tpm_show_temp_deactivated(struct device *,
|
|
struct device_attribute *attr, char *);
|
|
|
|
struct tpm_chip;
|
|
|
|
struct tpm_vendor_specific {
|
|
const u8 req_complete_mask;
|
|
const u8 req_complete_val;
|
|
const u8 req_canceled;
|
|
void __iomem *iobase; /* ioremapped address */
|
|
unsigned long base; /* TPM base address */
|
|
|
|
int irq;
|
|
|
|
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 *);
|
|
void (*release) (struct device *);
|
|
struct miscdevice miscdev;
|
|
struct attribute_group *attr_group;
|
|
struct list_head list;
|
|
int locality;
|
|
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
|
|
unsigned long duration[3]; /* jiffies */
|
|
|
|
wait_queue_head_t read_queue;
|
|
wait_queue_head_t int_queue;
|
|
};
|
|
|
|
struct tpm_chip {
|
|
struct device *dev; /* Device stuff */
|
|
|
|
int dev_num; /* /dev/tpm# */
|
|
unsigned long is_open; /* 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 mutex buffer_mutex;
|
|
|
|
struct timer_list user_read_timer; /* user needs to claim result */
|
|
struct work_struct work;
|
|
struct mutex tpm_mutex; /* tpm is processing */
|
|
|
|
struct tpm_vendor_specific vendor;
|
|
|
|
struct dentry **bios_dir;
|
|
|
|
struct list_head list;
|
|
void (*release) (struct device *);
|
|
};
|
|
|
|
#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
|
|
|
|
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 void tpm_get_timeouts(struct tpm_chip *);
|
|
extern void tpm_gen_interrupt(struct tpm_chip *);
|
|
extern void tpm_continue_selftest(struct tpm_chip *);
|
|
extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
|
|
extern struct tpm_chip* tpm_register_hardware(struct device *,
|
|
const struct tpm_vendor_specific *);
|
|
extern int tpm_open(struct inode *, struct file *);
|
|
extern int tpm_release(struct inode *, struct file *);
|
|
extern void tpm_dev_vendor_release(struct tpm_chip *);
|
|
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 *);
|
|
|
|
#ifdef CONFIG_ACPI
|
|
extern struct dentry ** tpm_bios_log_setup(char *);
|
|
extern void tpm_bios_log_teardown(struct dentry **);
|
|
#else
|
|
static inline struct dentry ** tpm_bios_log_setup(char *name)
|
|
{
|
|
return NULL;
|
|
}
|
|
static inline void tpm_bios_log_teardown(struct dentry **dir)
|
|
{
|
|
}
|
|
#endif
|