Dear all,
Changelog:
This patch corrects the PNP-handling inside the tpm-driver
and some minor coding style bugs.
Note: the pci-device and pnp-device mixture is currently necessary,
since the used "tpm"-interface requires a pci-dev in order to register
the driver. This will be fixed within the next iterations.
Signed-off-by: Marcel Selhorst <[email protected]>
---
diff -pruN linux-2.6.13-rc5/drivers/char/tpm/tpm_infineon.c
linux-2.6.13-rc5.new/drivers/char/tpm/tpm_infineon.c
--- linux-2.6.13-rc5/drivers/char/tpm/tpm_infineon.c 2005-08-06 17:07:55.000000000 +0000
+++ linux-2.6.13-rc5.new/drivers/char/tpm/tpm_infineon.c 2005-08-06
18:56:46.000000000 +0000
@@ -14,7 +14,6 @@
* License.
*/
-#include <acpi/acpi_bus.h>
#include <linux/pnp.h>
#include "tpm.h"
@@ -29,9 +28,10 @@
#define TPM_MAX_TRIES 5000
#define TPM_INFINEON_DEV_VEN_VALUE 0x15D1
-/* These values will be filled after ACPI-call */
+/* 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;
/* TPM header definitions */
enum infineon_tpm_header {
@@ -356,24 +356,26 @@ static const struct pnp_device_id tpm_pn
{"IFX0102", 0},
{"", 0}
};
+MODULE_DEVICE_TABLE(pnp, tpm_pnp_tbl);
-static int __devinit tpm_inf_acpi_probe(struct pnp_dev *dev,
+static int __devinit tpm_inf_pnp_probe(struct pnp_dev *dev,
const struct pnp_device_id *dev_id)
{
- 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",
+ 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);
- if (!((tpm_inf.base >> 8) & 0xff))
- tpm_inf.base = 0;
- return 0;
+ return 0;
+ } else
+ return -ENODEV;
}
static struct pnp_driver tpm_inf_pnp = {
.name = "tpm_inf_pnp",
.id_table = tpm_pnp_tbl,
- .probe = tpm_inf_acpi_probe,
+ .probe = tpm_inf_pnp_probe,
};
static int __devinit tpm_inf_probe(struct pci_dev *pci_dev,
@@ -386,19 +388,28 @@ static int __devinit tpm_inf_probe(struc
int productid[2];
char chipname[20];
- if (pci_enable_device(pci_dev))
- return -EIO;
+ 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 ACPI */
- pnp_register_driver(&tpm_inf_pnp);
- pnp_unregister_driver(&tpm_inf_pnp);
+ /* 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;
/* Make sure, we have received valid config ports */
if (!TPM_INF_ADDR) {
- pci_disable_device(pci_dev);
- return -EIO;
+ dev_err(&pci_dev->dev, "No valid IO-ports received!\n");
+ goto error;
}
/* query chip for its vendor, its version number a.s.o. */
@@ -418,23 +429,21 @@ static int __devinit tpm_inf_probe(struc
switch ((productid[0] << 8) | productid[1]) {
case 6:
- sprintf(chipname, " (SLD 9630 TT 1.1)");
+ snprintf(chipname, sizeof(chipname), " (SLD 9630 TT 1.1)");
break;
case 11:
- sprintf(chipname, " (SLB 9635 TT 1.2)");
+ snprintf(chipname, sizeof(chipname), " (SLB 9635 TT 1.2)");
break;
default:
- sprintf(chipname, " (unknown chip)");
+ snprintf(chipname, sizeof(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");
- pci_disable_device(pci_dev);
- return -EIO;
+ dev_err(&pci_dev->dev, "No IO-ports found!\n");
+ goto error;
}
/* configure TPM with IO-ports */
outb(IOLIMH, TPM_INF_ADDR);
@@ -452,8 +461,7 @@ static int __devinit tpm_inf_probe(struc
dev_err(&pci_dev->dev,
"Could not set IO-ports to %04x\n",
tpm_inf.base);
- pci_disable_device(pci_dev);
- return -EIO;
+ goto error;
}
/* activate register */
@@ -479,14 +487,16 @@ static int __devinit tpm_inf_probe(struc
productid[0], productid[1], chipname);
rc = tpm_register_hardware(pci_dev, &tpm_inf);
- if (rc < 0) {
- pci_disable_device(pci_dev);
- return -ENODEV;
- }
+ if (rc < 0)
+ goto error;
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;
return -ENODEV;
}
}
@@ -521,6 +531,8 @@ static int __init init_inf(void)
static void __exit cleanup_inf(void)
{
+ if (pnp_registered)
+ pnp_unregister_driver(&tpm_inf_pnp);
pci_unregister_driver(&inf_pci_driver);
}
-
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