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Subject[PATCH 6 of 6] tpm: move infineon driver off pci_dev
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This patch changes the infineon driver from a pci driver to a pnp
driver. This is possible because the infineon chip, unlike the other
1.1 chips, is supporting the 1.2 concepts of registering the device in
ACPI.

Signed-off-by: Kylene Hall <kjhall@us.ibm.com>
---

--- linux-2.6.14-rc4/drivers/char/tpm/tpm_infineon.c 2005-10-19 17:03:52.000000000 -0500
+++ linux-2.6.13-tpm/drivers/char/tpm/tpm_infineon.c 2005-10-21 13:07:24.000000000 -0500
@@ -14,6 +14,7 @@
* License.
*/

+#include <acpi/acpi_bus.h>
#include <linux/pnp.h>
#include "tpm.h"

@@ -28,10 +29,9 @@
#define TPM_MAX_TRIES 5000
#define TPM_INFINEON_DEV_VEN_VALUE 0x15D1

-/* These values will be filled after PnP-call */
+/* These values will be filled after ACPI-call */
static int TPM_INF_DATA = 0;
static int TPM_INF_ADDR = 0;
-static int pnp_registered = 0;

/* TPM header definitions */
enum infineon_tpm_header {
@@ -362,31 +362,10 @@ 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,
+static int __devinit tpm_inf_acpi_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)
-{
int rc = 0;
u8 iol, ioh;
int vendorid[2];
@@ -394,30 +373,19 @@ 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;
- } else {
- pnp_registered = 1;
- }
+
+ /* read IO-ports from ACPI */
+ 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);
+ if (!((tpm_inf.base >> 8) & 0xff))
+ tpm_inf.base = 0;

/* 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 -EIO;
}

/* query chip for its vendor, its version number a.s.o. */
@@ -437,21 +405,22 @@ static int __devinit tpm_inf_probe(struc

switch ((productid[0] << 8) | productid[1]) {
case 6:
- snprintf(chipname, sizeof(chipname), " (SLD 9630 TT 1.1)");
+ sprintf(chipname, " (SLD 9630 TT 1.1)");
break;
case 11:
- snprintf(chipname, sizeof(chipname), " (SLB 9635 TT 1.2)");
+ sprintf(chipname, " (SLB 9635 TT 1.2)");
break;
default:
- snprintf(chipname, sizeof(chipname), " (unknown chip)");
+ sprintf(chipname, " (unknown chip)");
break;
}
+ chipname[19] = 0;

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;
+ dev_err(&dev->dev, "No IO-ports found!\n");
+ return -EIO;
}
/* configure TPM with IO-ports */
outb(IOLIMH, TPM_INF_ADDR);
@@ -466,10 +435,10 @@ 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;
+ return -EIO;
}

/* activate register */
@@ -481,7 +450,7 @@ 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, "
@@ -494,62 +463,42 @@ static int __devinit tpm_inf_probe(struc
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) {
+ 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_remove(struct pnp_dev* dev)
{
- struct tpm_chip* chip = pci_get_drvdata(pci_dev);
+ struct tpm_chip* chip = pnp_get_drvdata(dev);

if( chip )
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",
+ .id_table = tpm_pnp_tbl,
+ .probe = tpm_inf_acpi_probe,
+ .remove = tpm_inf_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);

-
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