This commit was manufactured by cvs2svn to create branch 'vserver'.
[linux-2.6.git] / drivers / char / tpm / tpm_atmel.c
diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c
new file mode 100644 (file)
index 0000000..f9333e7
--- /dev/null
@@ -0,0 +1,216 @@
+/*
+ * 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 */
+#define        TPM_ATML_BASE                   0x400
+
+/* write status bits */
+#define        ATML_STATUS_ABORT               0x01
+#define        ATML_STATUS_LASTBYTE            0x04
+
+/* read status bits */
+#define        ATML_STATUS_BUSY                0x01
+#define        ATML_STATUS_DATA_AVAIL          0x02
+#define        ATML_STATUS_REWRITE             0x04
+
+
+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->pci_dev->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->pci_dev->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,
+                                       "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->pci_dev->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->pci_dev->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->pci_dev->dev, "tpm_atml_send: ");
+       for (i = 0; i < count; i++) {
+               dev_dbg(&chip->pci_dev->dev, "0x%x(%d) ", 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 struct file_operations atmel_ops = {
+       .owner = THIS_MODULE,
+       .llseek = no_llseek,
+       .open = tpm_open,
+       .read = tpm_read,
+       .write = tpm_write,
+       .release = tpm_release,
+};
+
+static struct tpm_vendor_specific tpm_atmel = {
+       .recv = tpm_atml_recv,
+       .send = tpm_atml_send,
+       .cancel = tpm_atml_cancel,
+       .req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
+       .req_complete_val = ATML_STATUS_DATA_AVAIL,
+       .base = TPM_ATML_BASE,
+       .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;
+
+       if (pci_enable_device(pci_dev))
+               return -EIO;
+
+       if (tpm_lpc_bus_init(pci_dev, TPM_ATML_BASE)) {
+               rc = -ENODEV;
+               goto out_err;
+       }
+
+       /* verify that it is an Atmel part */
+       if (tpm_read_index(4) != 'A' || tpm_read_index(5) != 'T'
+           || tpm_read_index(6) != 'M' || tpm_read_index(7) != 'L') {
+               rc = -ENODEV;
+               goto out_err;
+       }
+
+       /* query chip for its version number */
+       if ((version[0] = tpm_read_index(0x00)) != 0xFF) {
+               version[1] = tpm_read_index(0x01);
+               version[2] = tpm_read_index(0x02);
+               version[3] = tpm_read_index(0x03);
+       } else {
+               dev_info(&pci_dev->dev, "version query failed\n");
+               rc = -ENODEV;
+               goto out_err;
+       }
+
+       if ((rc = tpm_register_hardware(pci_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 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_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
+       {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);
+}
+
+module_init(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");