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[PATCH] tpm: add status function to allow non-lpc bus chips

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This patch is in preparation of supporting chips that are not necessarily on
the lpc bus and thus are not accessed with inb's and outb's.  The patch
replaces the call to get the chip's status in the tpm.c file with a vendor
specific status function.  The patch also defines the function for each of the
current supported devices.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kylene Jo Hall 2005-10-30 15:03:23 -08:00 committed by Linus Torvalds
parent 162a88f7b8
commit b4ed3e3cbb
5 changed files with 20 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/char/tpm/tpm.c
View file

@ -79,7 +79,7 @@ static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
stop = jiffies + 2 * 60 * HZ;
do {
u8 status = inb(chip->vendor->base + 1);
u8 status = chip->vendor->status(chip);
if ((status & chip->vendor->req_complete_mask) ==
chip->vendor->req_complete_val) {
goto out_recv;

1
drivers/char/tpm/tpm.h
View file

@ -55,6 +55,7 @@ struct tpm_vendor_specific {
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;
};

6
drivers/char/tpm/tpm_atmel.c
View file

@ -118,6 +118,11 @@ static void tpm_atml_cancel(struct tpm_chip *chip)
outb(ATML_STATUS_ABORT, chip->vendor->base + 1);
}
static u8 tpm_atml_status(struct tpm_chip *chip)
{
return inb(chip->vendor->base + 1);
}
static struct file_operations atmel_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@ -146,6 +151,7 @@ static struct tpm_vendor_specific tpm_atmel = {
.recv = tpm_atml_recv,
.send = tpm_atml_send,
.cancel = tpm_atml_cancel,
.status = tpm_atml_status,
.req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
.req_complete_val = ATML_STATUS_DATA_AVAIL,
.req_canceled = ATML_STATUS_READY,

6
drivers/char/tpm/tpm_infineon.c
View file

@ -316,6 +316,11 @@ static void tpm_inf_cancel(struct tpm_chip *chip)
*/
}
static u8 tpm_inf_status(struct tpm_chip *chip)
{
return inb(chip->vendor->base + 1);
}
static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
@ -344,6 +349,7 @@ static struct tpm_vendor_specific tpm_inf = {
.recv = tpm_inf_recv,
.send = tpm_inf_send,
.cancel = tpm_inf_cancel,
.status = tpm_inf_status,
.req_complete_mask = 0,
.req_complete_val = 0,
.attr_group = &inf_attr_grp,

6
drivers/char/tpm/tpm_nsc.c
View file

@ -220,6 +220,11 @@ static void tpm_nsc_cancel(struct tpm_chip *chip)
outb(NSC_COMMAND_CANCEL, chip->vendor->base + NSC_COMMAND);
}
static u8 tpm_nsc_status(struct tpm_chip *chip)
{
return inb(chip->vendor->base + NSC_STATUS);
}
static struct file_operations nsc_ops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
@ -248,6 +253,7 @@ static struct tpm_vendor_specific tpm_nsc = {
.recv = tpm_nsc_recv,
.send = tpm_nsc_send,
.cancel = tpm_nsc_cancel,
.status = tpm_nsc_status,
.req_complete_mask = NSC_STATUS_OBF,
.req_complete_val = NSC_STATUS_OBF,
.req_canceled = NSC_STATUS_RDY,