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path: root/drivers/char/tpm/tpm_atmel.c
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Diffstat (limited to 'drivers/char/tpm/tpm_atmel.c')
-rw-r--r--drivers/char/tpm/tpm_atmel.c147
1 files changed, 81 insertions, 66 deletions
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index c0d64914595f..32e01450c425 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -19,6 +19,7 @@
*
*/
+#include <linux/platform_device.h>
#include "tpm.h"
/* Atmel definitions */
@@ -40,7 +41,7 @@ enum tpm_atmel_read_status {
ATML_STATUS_READY = 0x08
};
-static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
+static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
{
u8 status, *hdr = buf;
u32 size;
@@ -54,7 +55,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
for (i = 0; i < 6; i++) {
status = inb(chip->vendor->base + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(&chip->pci_dev->dev,
+ dev_err(chip->dev,
"error reading header\n");
return -EIO;
}
@@ -66,12 +67,12 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
size = be32_to_cpu(*native_size);
if (count < size) {
- dev_err(&chip->pci_dev->dev,
+ dev_err(chip->dev,
"Recv size(%d) less than available space\n", size);
for (; i < size; i++) { /* clear the waiting data anyway */
status = inb(chip->vendor->base + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(&chip->pci_dev->dev,
+ dev_err(chip->dev,
"error reading data\n");
return -EIO;
}
@@ -83,7 +84,7 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
for (; i < size; i++) {
status = inb(chip->vendor->base + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(&chip->pci_dev->dev,
+ dev_err(chip->dev,
"error reading data\n");
return -EIO;
}
@@ -93,20 +94,20 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
/* make sure data available is gone */
status = inb(chip->vendor->base + 1);
if (status & ATML_STATUS_DATA_AVAIL) {
- dev_err(&chip->pci_dev->dev, "data available is stuck\n");
+ dev_err(chip->dev, "data available is stuck\n");
return -EIO;
}
return size;
}
-static int tpm_atml_send(struct tpm_chip *chip, u8 * buf, size_t count)
+static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
{
int i;
- dev_dbg(&chip->pci_dev->dev, "tpm_atml_send: ");
+ dev_dbg(chip->dev, "tpm_atml_send:\n");
for (i = 0; i < count; i++) {
- dev_dbg(&chip->pci_dev->dev, "0x%x(%d) ", buf[i], buf[i]);
+ dev_dbg(chip->dev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
outb(buf[i], chip->vendor->base);
}
@@ -118,6 +119,11 @@ 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,
@@ -137,7 +143,7 @@ static struct attribute* atmel_attrs[] = {
&dev_attr_pcrs.attr,
&dev_attr_caps.attr,
&dev_attr_cancel.attr,
- 0,
+ NULL,
};
static struct attribute_group atmel_attr_grp = { .attrs = atmel_attrs };
@@ -146,6 +152,7 @@ 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,
@@ -153,86 +160,94 @@ static struct tpm_vendor_specific tpm_atmel = {
.miscdev = { .fops = &atmel_ops, },
};
-static int __devinit tpm_atml_init(struct pci_dev *pci_dev,
- const struct pci_device_id *pci_id)
+static struct platform_device *pdev;
+
+static void __devexit tpm_atml_remove(struct device *dev)
+{
+ struct tpm_chip *chip = dev_get_drvdata(dev);
+ if (chip) {
+ release_region(chip->vendor->base, 2);
+ tpm_remove_hardware(chip->dev);
+ }
+}
+
+static struct device_driver atml_drv = {
+ .name = "tpm_atmel",
+ .bus = &platform_bus_type,
+ .owner = THIS_MODULE,
+ .suspend = tpm_pm_suspend,
+ .resume = tpm_pm_resume,
+};
+
+static int __init init_atmel(void)
{
- u8 version[4];
int rc = 0;
int lo, hi;
- if (pci_enable_device(pci_dev))
- return -EIO;
+ driver_register(&atml_drv);
lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO);
hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI);
tpm_atmel.base = (hi<<8)|lo;
- dev_dbg( &pci_dev->dev, "Operating with base: 0x%x\n", tpm_atmel.base);
/* verify that it is an Atmel part */
if (tpm_read_index(TPM_ADDR, 4) != 'A' || tpm_read_index(TPM_ADDR, 5) != 'T'
|| tpm_read_index(TPM_ADDR, 6) != 'M' || tpm_read_index(TPM_ADDR, 7) != 'L') {
- rc = -ENODEV;
- goto out_err;
+ return -ENODEV;
}
- /* query chip for its version number */
- if ((version[0] = tpm_read_index(TPM_ADDR, 0x00)) != 0xFF) {
- version[1] = tpm_read_index(TPM_ADDR, 0x01);
- version[2] = tpm_read_index(TPM_ADDR, 0x02);
- version[3] = tpm_read_index(TPM_ADDR, 0x03);
- } else {
- dev_info(&pci_dev->dev, "version query failed\n");
- rc = -ENODEV;
- goto out_err;
+ /* verify chip version number is 1.1 */
+ if ( (tpm_read_index(TPM_ADDR, 0x00) != 0x01) ||
+ (tpm_read_index(TPM_ADDR, 0x01) != 0x01 ))
+ return -ENODEV;
+
+ pdev = kzalloc(sizeof(struct platform_device), GFP_KERNEL);
+ if ( !pdev )
+ return -ENOMEM;
+
+ pdev->name = "tpm_atmel0";
+ pdev->id = -1;
+ pdev->num_resources = 0;
+ pdev->dev.release = tpm_atml_remove;
+ pdev->dev.driver = &atml_drv;
+
+ if ((rc = platform_device_register(pdev)) < 0) {
+ kfree(pdev);
+ pdev = NULL;
+ return rc;
}
- if ((rc = tpm_register_hardware(pci_dev, &tpm_atmel)) < 0)
- goto out_err;
+ if (request_region(tpm_atmel.base, 2, "tpm_atmel0") == NULL ) {
+ platform_device_unregister(pdev);
+ kfree(pdev);
+ pdev = NULL;
+ return -EBUSY;
+ }
- dev_info(&pci_dev->dev,
- "Atmel TPM version %d.%d.%d.%d\n", version[0], version[1],
- version[2], version[3]);
+ if ((rc = tpm_register_hardware(&pdev->dev, &tpm_atmel)) < 0) {
+ release_region(tpm_atmel.base, 2);
+ platform_device_unregister(pdev);
+ kfree(pdev);
+ pdev = NULL;
+ return rc;
+ }
+ dev_info(&pdev->dev, "Atmel TPM 1.1, Base Address: 0x%x\n",
+ tpm_atmel.base);
return 0;
-out_err:
- pci_disable_device(pci_dev);
- return rc;
-}
-
-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_ICH7_0)},
- {PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
- {PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6LPC)},
- {0,}
-};
-
-MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
-
-static struct pci_driver atmel_pci_driver = {
- .name = "tpm_atmel",
- .id_table = tpm_pci_tbl,
- .probe = tpm_atml_init,
- .remove = __devexit_p(tpm_remove),
- .suspend = tpm_pm_suspend,
- .resume = tpm_pm_resume,
-};
-
-static int __init init_atmel(void)
-{
- return pci_register_driver(&atmel_pci_driver);
}
static void __exit cleanup_atmel(void)
{
- pci_unregister_driver(&atmel_pci_driver);
+ if (pdev) {
+ tpm_atml_remove(&pdev->dev);
+ platform_device_unregister(pdev);
+ kfree(pdev);
+ pdev = NULL;
+ }
+
+ driver_unregister(&atml_drv);
}
module_init(init_atmel);
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 10:01:51 +0100