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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.c125
1 files changed, 48 insertions, 77 deletions
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
index 32e0145..ff36549 100644
--- a/drivers/char/tpm/tpm_atmel.c
+++ b/drivers/char/tpm/tpm_atmel.c
@@ -19,14 +19,8 @@
*
*/
-#include <linux/platform_device.h>
#include "tpm.h"
-
-/* Atmel definitions */
-enum tpm_atmel_addr {
- TPM_ATMEL_BASE_ADDR_LO = 0x08,
- TPM_ATMEL_BASE_ADDR_HI = 0x09
-};
+#include "tpm_atmel.h"
/* write status bits */
enum tpm_atmel_write_status {
@@ -53,13 +47,12 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
return -EIO;
for (i = 0; i < 6; i++) {
- status = inb(chip->vendor->base + 1);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading header\n");
+ dev_err(chip->dev, "error reading header\n");
return -EIO;
}
- *buf++ = inb(chip->vendor->base);
+ *buf++ = ioread8(chip->vendor->iobase);
}
/* size of the data received */
@@ -70,10 +63,9 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
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);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading data\n");
+ dev_err(chip->dev, "error reading data\n");
return -EIO;
}
}
@@ -82,17 +74,17 @@ static int tpm_atml_recv(struct tpm_chip *chip, u8 *buf, size_t count)
/* read all the data available */
for (; i < size; i++) {
- status = inb(chip->vendor->base + 1);
+ status = ioread8(chip->vendor->iobase + 1);
if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
- dev_err(chip->dev,
- "error reading data\n");
+ dev_err(chip->dev, "error reading data\n");
return -EIO;
}
- *buf++ = inb(chip->vendor->base);
+ *buf++ = ioread8(chip->vendor->iobase);
}
/* make sure data available is gone */
- status = inb(chip->vendor->base + 1);
+ status = ioread8(chip->vendor->iobase + 1);
+
if (status & ATML_STATUS_DATA_AVAIL) {
dev_err(chip->dev, "data available is stuck\n");
return -EIO;
@@ -108,7 +100,7 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
dev_dbg(chip->dev, "tpm_atml_send:\n");
for (i = 0; i < count; i++) {
dev_dbg(chip->dev, "%d 0x%x(%d)\n", i, buf[i], buf[i]);
- outb(buf[i], chip->vendor->base);
+ iowrite8(buf[i], chip->vendor->iobase);
}
return count;
@@ -116,12 +108,12 @@ static int tpm_atml_send(struct tpm_chip *chip, u8 *buf, size_t count)
static void tpm_atml_cancel(struct tpm_chip *chip)
{
- outb(ATML_STATUS_ABORT, chip->vendor->base + 1);
+ iowrite8(ATML_STATUS_ABORT, chip->vendor->iobase + 1);
}
static u8 tpm_atml_status(struct tpm_chip *chip)
{
- return inb(chip->vendor->base + 1);
+ return ioread8(chip->vendor->iobase + 1);
}
static struct file_operations atmel_ops = {
@@ -162,12 +154,17 @@ static struct tpm_vendor_specific tpm_atmel = {
static struct platform_device *pdev;
-static void __devexit tpm_atml_remove(struct device *dev)
+static void atml_plat_remove(void)
{
- struct tpm_chip *chip = dev_get_drvdata(dev);
+ struct tpm_chip *chip = dev_get_drvdata(&pdev->dev);
+
if (chip) {
- release_region(chip->vendor->base, 2);
+ if (chip->vendor->have_region)
+ atmel_release_region(chip->vendor->base,
+ chip->vendor->region_size);
+ atmel_put_base_addr(chip->vendor);
tpm_remove_hardware(chip->dev);
+ platform_device_unregister(pdev);
}
}
@@ -182,72 +179,46 @@ static struct device_driver atml_drv = {
static int __init init_atmel(void)
{
int rc = 0;
- int lo, hi;
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;
-
- /* 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') {
- return -ENODEV;
+ if ((tpm_atmel.iobase = atmel_get_base_addr(&tpm_atmel)) == NULL) {
+ rc = -ENODEV;
+ goto err_unreg_drv;
}
- /* 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;
- }
+ tpm_atmel.have_region =
+ (atmel_request_region
+ (tpm_atmel.base, tpm_atmel.region_size,
+ "tpm_atmel0") == NULL) ? 0 : 1;
- if (request_region(tpm_atmel.base, 2, "tpm_atmel0") == NULL ) {
- platform_device_unregister(pdev);
- kfree(pdev);
- pdev = NULL;
- return -EBUSY;
+ if (IS_ERR
+ (pdev =
+ platform_device_register_simple("tpm_atmel", -1, NULL, 0))) {
+ rc = PTR_ERR(pdev);
+ goto err_rel_reg;
}
- 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);
+ if ((rc = tpm_register_hardware(&pdev->dev, &tpm_atmel)) < 0)
+ goto err_unreg_dev;
return 0;
+
+err_unreg_dev:
+ platform_device_unregister(pdev);
+err_rel_reg:
+ atmel_put_base_addr(&tpm_atmel);
+ if (tpm_atmel.have_region)
+ atmel_release_region(tpm_atmel.base,
+ tpm_atmel.region_size);
+err_unreg_drv:
+ driver_unregister(&atml_drv);
+ return rc;
}
static void __exit cleanup_atmel(void)
{
- if (pdev) {
- tpm_atml_remove(&pdev->dev);
- platform_device_unregister(pdev);
- kfree(pdev);
- pdev = NULL;
- }
-
driver_unregister(&atml_drv);
+ atml_plat_remove();
}
module_init(init_atmel);
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