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SubjectRe: [PATCH] Infineon TPM: move infineon driver off pci_dev
Dear all,

the following patch moves the Infineon TPM driver off pci device
and makes it a pure pnp-driver. It was tested with IFX0101 and
IFX0102 and is now based on the new tpm patchset (1 to 5) from Kylene
Hall submitted two days ago. It now also includes pnp-port validation
and region requesting.

Best regards,

Marcel Selhorst

Signed-off-by: Marcel Selhorst <selhorst@crypto.rub.de>
---

diff -pruN linux-2.6.14-rc5.ibm/drivers/char/tpm/tpm_infineon.c
linux-2.6.14-rc5.infineon-v1.6/drivers/char/tpm/tpm_infineon.c
--- linux-2.6.14-rc5.ibm/drivers/char/tpm/tpm_infineon.c 2005-10-27
13:28:54.000000000 +0200
+++ linux-2.6.14-rc5.infineon-v1.6/drivers/char/tpm/tpm_infineon.c 2005-10-27
13:25:19.000000000 +0200
@@ -5,6 +5,7 @@
* Specifications at www.trustedcomputinggroup.org
*
* Copyright (C) 2005, Marcel Selhorst <selhorst@crypto.rub.de>
+ * Sirrix AG - security technologies, http://www.sirrix.com and
* Applied Data Security Group, Ruhr-University Bochum, Germany
* Project-Homepage: http://www.prosec.rub.de/tpm
*
@@ -31,7 +32,8 @@
/* These values will be filled after PnP-call */
static int TPM_INF_DATA = 0;
static int TPM_INF_ADDR = 0;
-static int pnp_registered = 0;
+static int TPM_INF_BASE = 0;
+static int TPM_INF_PORT_LEN = 0;

/* TPM header definitions */
enum infineon_tpm_header {
@@ -143,11 +145,9 @@ static int wait(struct tpm_chip *chip, i
}
if (i == TPM_MAX_TRIES) { /* timeout occurs */
if (wait_for_bit == STAT_XFE)
- dev_err(chip->dev,
- "Timeout in wait(STAT_XFE)\n");
+ dev_err(chip->dev, "Timeout in wait(STAT_XFE)\n");
if (wait_for_bit == STAT_RDA)
- dev_err(chip->dev,
- "Timeout in wait(STAT_RDA)\n");
+ dev_err(chip->dev, "Timeout in wait(STAT_RDA)\n");
return -EIO;
}
return 0;
@@ -221,8 +221,7 @@ recv_begin:
}

if ((size == 0x6D00) && (buf[1] == 0x80)) {
- dev_err(chip->dev,
- "Error handling on vendor layer!\n");
+ dev_err(chip->dev, "Error handling on vendor layer!\n");
return -EIO;
}

@@ -318,7 +317,7 @@ static void tpm_inf_cancel(struct tpm_ch

static u8 tpm_inf_status(struct tpm_chip *chip)
{
- return inb(chip->vendor->base + 1);
+ return inb(chip->vendor->base + STAT);
}

static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
@@ -362,30 +361,11 @@ static const struct pnp_device_id tpm_pn
{"IFX0102", 0},
{"", 0}
};
+
MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);

static int __devinit tpm_inf_pnp_probe(struct pnp_dev *dev,
- const struct pnp_device_id *dev_id)
-{
- if (pnp_port_valid(dev, 0)) {
- TPM_INF_ADDR = (pnp_port_start(dev, 0) & 0xff);
- TPM_INF_DATA = ((TPM_INF_ADDR + 1) & 0xff);
- tpm_inf.base = pnp_port_start(dev, 1);
- dev_info(&dev->dev, "Found %s with ID %s\n",
- dev->name, dev_id->id);
- return 0;
- }
- return -ENODEV;
-}
-
-static struct pnp_driver tpm_inf_pnp = {
- .name = "tpm_inf_pnp",
- .id_table = tpm_pnp_tbl,
- .probe = tpm_inf_pnp_probe,
-};
-
-static int __devinit tpm_inf_probe(struct pci_dev *pci_dev,
- const struct pci_device_id *pci_id)
+ const struct pnp_device_id *dev_id)
{
int rc = 0;
u8 iol, ioh;
@@ -394,30 +374,28 @@ static int __devinit tpm_inf_probe(struc
int productid[2];
char chipname[20];

- rc = pci_enable_device(pci_dev);
- if (rc)
- return rc;
-
- dev_info(&pci_dev->dev, "LPC-bus found at 0x%x\n", pci_id->device);
-
- /* read IO-ports from PnP */
- rc = pnp_register_driver(&tpm_inf_pnp);
- if (rc < 0) {
- dev_err(&pci_dev->dev,
- "Error %x from pnp_register_driver!\n",rc);
- goto error2;
- }
- if (!rc) {
- dev_info(&pci_dev->dev, "No Infineon TPM found!\n");
- goto error;
+ /* read IO-ports through PnP */
+ if (pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) &&
+ !(pnp_port_flags(dev, 0) & IORESOURCE_DISABLED)) {
+ TPM_INF_ADDR = pnp_port_start(dev, 0);
+ TPM_INF_DATA = (TPM_INF_ADDR + 1);
+ TPM_INF_BASE = pnp_port_start(dev, 1);
+ TPM_INF_PORT_LEN = pnp_port_len(dev, 1);
+ if (!TPM_INF_PORT_LEN)
+ return -EINVAL;
+ dev_info(&dev->dev, "Found %s with ID %s\n",
+ dev->name, dev_id->id);
+ if (!((TPM_INF_BASE >> 8) & 0xff))
+ return -EINVAL;
+ /* publish my base address and request region */
+ tpm_inf.base = TPM_INF_BASE;
+ if (request_region
+ (tpm_inf.base, TPM_INF_PORT_LEN, "tpm_infineon0") == NULL) {
+ release_region(tpm_inf.base, TPM_INF_PORT_LEN);
+ return -EINVAL;
+ }
} else {
- pnp_registered = 1;
- }
-
- /* Make sure, we have received valid config ports */
- if (!TPM_INF_ADDR) {
- dev_err(&pci_dev->dev, "No valid IO-ports received!\n");
- goto error;
+ return -EINVAL;
}

/* query chip for its vendor, its version number a.s.o. */
@@ -449,10 +427,6 @@ static int __devinit tpm_inf_probe(struc

if ((vendorid[0] << 8 | vendorid[1]) == (TPM_INFINEON_DEV_VEN_VALUE)) {

- if (tpm_inf.base == 0) {
- dev_err(&pci_dev->dev, "No IO-ports found!\n");
- goto error;
- }
/* configure TPM with IO-ports */
outb(IOLIMH, TPM_INF_ADDR);
outb(((tpm_inf.base >> 8) & 0xff), TPM_INF_DATA);
@@ -466,10 +440,11 @@ static int __devinit tpm_inf_probe(struc
iol = inb(TPM_INF_DATA);

if ((ioh << 8 | iol) != tpm_inf.base) {
- dev_err(&pci_dev->dev,
+ dev_err(&dev->dev,
"Could not set IO-ports to %04x\n",
tpm_inf.base);
- goto error;
+ release_region(tpm_inf.base, TPM_INF_PORT_LEN);
+ return -EIO;
}

/* activate register */
@@ -481,7 +456,7 @@ static int __devinit tpm_inf_probe(struc
outb(RESET_LP_IRQC_DISABLE, tpm_inf.base + CMD);

/* Finally, we're done, print some infos */
- dev_info(&pci_dev->dev, "TPM found: "
+ dev_info(&dev->dev, "TPM found: "
"config base 0x%x, "
"io base 0x%x, "
"chip version %02x%02x, "
@@ -489,67 +464,51 @@ static int __devinit tpm_inf_probe(struc
"product id %02x%02x"
"%s\n",
TPM_INF_ADDR,
- tpm_inf.base,
+ TPM_INF_BASE,
version[0], version[1],
vendorid[0], vendorid[1],
productid[0], productid[1], chipname);

- rc = tpm_register_hardware(&pci_dev->dev, &tpm_inf);
- if (rc < 0)
- goto error;
+ rc = tpm_register_hardware(&dev->dev, &tpm_inf);
+ if (rc < 0) {
+ release_region(tpm_inf.base, TPM_INF_PORT_LEN);
+ return -ENODEV;
+ }
return 0;
} else {
- dev_info(&pci_dev->dev, "No Infineon TPM found!\n");
-error:
- pnp_unregister_driver(&tpm_inf_pnp);
-error2:
- pci_disable_device(pci_dev);
- pnp_registered = 0;
+ dev_info(&dev->dev, "No Infineon TPM found!\n");
return -ENODEV;
}
}

-static __devexit void tpm_inf_remove(struct pci_dev* pci_dev)
+static __devexit void tpm_inf_pnp_remove(struct pnp_dev *dev)
{
- struct tpm_chip* chip = pci_get_drvdata(pci_dev);
-
- if( chip )
+ struct tpm_chip *chip = pnp_get_drvdata(dev);
+
+ if (chip) {
+ release_region(chip->vendor->base, TPM_INF_PORT_LEN);
tpm_remove_hardware(chip->dev);
+ }
}

-static struct pci_device_id tpm_pci_tbl[] __devinitdata = {
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_0)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_1)},
- {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ICH6_2)},
- {0,}
-};
-
-MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
-
-static struct pci_driver inf_pci_driver = {
- .name = "tpm_inf",
- .id_table = tpm_pci_tbl,
- .probe = tpm_inf_probe,
- .remove = __devexit_p(tpm_inf_remove),
- .suspend = tpm_pm_suspend,
- .resume = tpm_pm_resume,
+static struct pnp_driver tpm_inf_pnp = {
+ .name = "tpm_inf_pnp",
+ .driver.owner = THIS_MODULE,
+ .id_table = tpm_pnp_tbl,
+ .probe = tpm_inf_pnp_probe,
+ .remove = tpm_inf_pnp_remove,
+ .driver.suspend = tpm_pm_suspend,
+ .driver.resume = tpm_pm_resume,
};

static int __init init_inf(void)
{
- return pci_register_driver(&inf_pci_driver);
+ return pnp_register_driver(&tpm_inf_pnp);
}

static void __exit cleanup_inf(void)
{
- if (pnp_registered)
- pnp_unregister_driver(&tpm_inf_pnp);
- pci_unregister_driver(&inf_pci_driver);
+ pnp_unregister_driver(&tpm_inf_pnp);
}

module_init(init_inf);
@@ -557,5 +516,5 @@ module_exit(cleanup_inf);

MODULE_AUTHOR("Marcel Selhorst <selhorst@crypto.rub.de>");
MODULE_DESCRIPTION("Driver for Infineon TPM SLD 9630 TT 1.1 / SLB 9635 TT 1.2");
-MODULE_VERSION("1.5");
+MODULE_VERSION("1.6");
MODULE_LICENSE("GPL");
-
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