diff options
Diffstat (limited to 'drivers/char/tpm/tpm_atmel.c')
| -rw-r--r-- | drivers/char/tpm/tpm_atmel.c | 146 |
1 files changed, 80 insertions, 66 deletions
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c index c0d64914595f..8cb42e84723c 100644 --- a/drivers/char/tpm/tpm_atmel.c +++ b/drivers/char/tpm/tpm_atmel.c @@ -40,7 +40,7 @@ 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 +54,7 @@ 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 +66,12 @@ 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 +83,7 @@ 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 +93,20 @@ 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 +118,11 @@ 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 +142,7 @@ 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 +151,7 @@ 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 +159,94 @@ 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); |