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Diffstat (limited to 'linux-2.6-xen-sparse/drivers/char/tpm/tpm_atmel.c')
-rw-r--r--linux-2.6-xen-sparse/drivers/char/tpm/tpm_atmel.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/linux-2.6-xen-sparse/drivers/char/tpm/tpm_atmel.c b/linux-2.6-xen-sparse/drivers/char/tpm/tpm_atmel.c
new file mode 100644
index 0000000000..00a3a57a23
--- /dev/null
+++ b/linux-2.6-xen-sparse/drivers/char/tpm/tpm_atmel.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2004 IBM Corporation
+ *
+ * Authors:
+ * Leendert van Doorn <leendert@watson.ibm.com>
+ * Dave Safford <safford@watson.ibm.com>
+ * Reiner Sailer <sailer@watson.ibm.com>
+ * Kylene Hall <kjhall@us.ibm.com>
+ *
+ * Maintained by: <tpmdd_devel@lists.sourceforge.net>
+ *
+ * Device driver for TCG/TCPA TPM (trusted platform module).
+ * Specifications at www.trustedcomputinggroup.org
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, version 2 of the
+ * License.
+ *
+ */
+
+#include "tpm.h"
+
+/* Atmel definitions */
+enum tpm_atmel_addr {
+ TPM_ATMEL_BASE_ADDR_LO = 0x08,
+ TPM_ATMEL_BASE_ADDR_HI = 0x09
+};
+
+/* write status bits */
+enum tpm_atmel_write_status {
+ ATML_STATUS_ABORT = 0x01,
+ ATML_STATUS_LASTBYTE = 0x04
+};
+/* read status bits */
+enum tpm_atmel_read_status {
+ ATML_STATUS_BUSY = 0x01,
+ ATML_STATUS_DATA_AVAIL = 0x02,
+ ATML_STATUS_REWRITE = 0x04,
+ ATML_STATUS_READY = 0x08
+};
+
+static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
+{
+ u8 status, *hdr = buf;
+ u32 size;
+ int i;
+ __be32 *native_size;
+
+ /* start reading header */
+ if (count < 6)
+ return -EIO;
+
+ for (i = 0; i < 6; i++) {
+ status = inb(chip->vendor->base + 1);
+ if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
+ dev_err(chip->dev,
+ "error reading header\n");
+ return -EIO;
+ }
+ *buf++ = inb(chip->vendor->base);
+ }
+
+ /* size of the data received */
+ native_size = (__force __be32 *) (hdr + 2);
+ size = be32_to_cpu(*native_size);
+
+ if (count < size) {
+ 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->dev,
+ "error reading data\n");
+ return -EIO;
+ }
+ }
+ return -EIO;
+ }
+
+ /* read all the data available */
+ for (; i < size; i++) {
+ status = inb(chip->vendor->base + 1);
+ if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
+ dev_err(chip->dev,
+ "error reading data\n");
+ return -EIO;
+ }
+ *buf++ = inb(chip->vendor->base);
+ }
+
+ /* make sure data available is gone */
+ status = inb(chip->vendor->base + 1);
+ if (status & ATML_STATUS_DATA_AVAIL) {
+ 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)
+{
+ int i;
+
+ 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);
+ }
+
+ return count;
+}
+
+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,
+ .open = tpm_open,
+ .read = tpm_read,
+ .write = tpm_write,
+ .release = tpm_release,
+};
+
+static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
+static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
+static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
+static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
+
+static struct attribute* atmel_attrs[] = {
+ &dev_attr_pubek.attr,
+ &dev_attr_pcrs.attr,
+ &dev_attr_caps.attr,
+ &dev_attr_cancel.attr,
+ 0,
+};
+
+static struct attribute_group atmel_attr_grp = { .attrs = atmel_attrs };
+
+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,
+ .attr_group = &atmel_attr_grp,
+ .miscdev = { .fops = &atmel_ops, },
+};
+
+static int __devinit tpm_atml_init(struct pci_dev *pci_dev,
+ const struct pci_device_id *pci_id)
+{
+ u8 version[4];
+ int rc = 0;
+ int lo, hi;
+
+ if (pci_enable_device(pci_dev))
+ return -EIO;
+
+ 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;
+ }
+
+ /* 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;
+ }
+
+ if ((rc = tpm_register_hardware(&pci_dev->dev, &tpm_atmel)) < 0)
+ goto out_err;
+
+ dev_info(&pci_dev->dev,
+ "Atmel TPM version %d.%d.%d.%d\n", version[0], version[1],
+ version[2], version[3]);
+
+ return 0;
+out_err:
+ pci_disable_device(pci_dev);
+ return rc;
+}
+
+static void __devexit tpm_atml_remove(struct pci_dev *pci_dev)
+{
+ struct tpm_chip *chip = pci_get_drvdata(pci_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_ICH7_0)},
+ {PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
+#ifndef PCI_DEVICE_ID_SERVERWORKS_CSB6LPC
+#define PCI_DEVICE_ID_SERVERWORKS_CSB6LPC 0x0227
+#else
+#warning Remove the define of PCI_DEVICE_ID_SERVERWORKS_CSB6LPC
+#endif
+ {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_atml_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);
+}
+
+fs_initcall(init_atmel);
+module_exit(cleanup_atmel);
+
+MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
+MODULE_DESCRIPTION("TPM Driver");
+MODULE_VERSION("2.0");
+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-29 14:15:23 +0000