1 files changed, 131 insertions, 0 deletions

diff --git a/drivers/char/tpm/tpm_atmel.h b/drivers/char/tpm/tpm_atmel.h
new file mode 100644
index 000000000000..d3478aaadd77
--- /dev/null
+++ b/drivers/char/tpm/tpm_atmel.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2005 IBM Corporation
+ *
+ * Authors:
+ * 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.
+ *
+ * These difference are required on power because the device must be
+ * discovered through the device tree and iomap must be used to get
+ * around the need for holes in the io_page_mask.  This does not happen
+ * automatically because the tpm is not a normal pci device and lives
+ * under the root node.
+ *
+ */
+
+#ifdef CONFIG_PPC64
+#define atmel_getb(chip, offset) readb(chip->vendor->iobase + offset);
+#define atmel_putb(val, chip, offset) writeb(val, chip->vendor->iobase + offset)
+#define atmel_request_region request_mem_region
+#define atmel_release_region release_mem_region
+
+static inline void atmel_put_base_addr(struct tpm_vendor_specific
+                                         *vendor)
+{
+        iounmap(vendor->iobase);
+}
+
+static void __iomem * atmel_get_base_addr(struct tpm_vendor_specific *vendor)
+{
+        struct device_node *dn;
+        unsigned long address, size;
+        unsigned int *reg;
+        int reglen;
+        int naddrc;
+        int nsizec;
+
+        dn = of_find_node_by_name(NULL, "tpm");
+
+        if (!dn)
+                return NULL;
+
+        if (!device_is_compatible(dn, "AT97SC3201")) {
+                of_node_put(dn);
+                return NULL;
+        }
+
+        reg = (unsigned int *) get_property(dn, "reg", &reglen);
+        naddrc = prom_n_addr_cells(dn);
+        nsizec = prom_n_size_cells(dn);
+
+        of_node_put(dn);
+
+
+        if (naddrc == 2)
+                address = ((unsigned long) reg[0] << 32) | reg[1];
+        else
+                address = reg[0];
+
+        if (nsizec == 2)
+                size =
+                    ((unsigned long) reg[naddrc] << 32) | reg[naddrc + 1];
+        else
+                size = reg[naddrc];
+
+        vendor->base = address;
+        vendor->region_size = size;
+        return ioremap(vendor->base, vendor->region_size);
+}
+#else
+#define atmel_getb(chip, offset) inb(chip->vendor->base + offset)
+#define atmel_putb(val, chip, offset) outb(val, chip->vendor->base + offset)
+#define atmel_request_region request_region
+#define atmel_release_region release_region
+/* Atmel definitions */
+enum tpm_atmel_addr {
+        TPM_ATMEL_BASE_ADDR_LO = 0x08,
+        TPM_ATMEL_BASE_ADDR_HI = 0x09
+};
+
+/* Verify this is a 1.1 Atmel TPM */
+static int atmel_verify_tpm11(void)
+{
+
+        /* 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 1;
+
+        /* query chip for its version number */
+        if (tpm_read_index(TPM_ADDR, 0x00) != 1 ||
+            tpm_read_index(TPM_ADDR, 0x01) != 1)
+                return 1;
+
+        /* This is an atmel supported part */
+        return 0;
+}
+
+static inline void atmel_put_base_addr(struct tpm_vendor_specific
+                                         *vendor)
+{
+}
+
+/* Determine where to talk to device */
+static void __iomem * atmel_get_base_addr(struct tpm_vendor_specific
+                                         *vendor)
+{
+        int lo, hi;
+
+        if (atmel_verify_tpm11() != 0)
+                return NULL;
+
+        lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO);
+        hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI);
+
+        vendor->base = (hi << 8) | lo;
+        vendor->region_size = 2;
+
+        return ioport_map(vendor->base, vendor->region_size);
+}
+#endif