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Kylene Jo Hall
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Linus Torvalds
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Nov 14, 2005
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| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: c0131c143204ee0ba00592c016f20ce6fc67827d | ||
| refs/heads/master: ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7 |
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| /* | ||
| * 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 int 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 1; | ||
|
|
||
| if (!device_is_compatible(dn, "AT97SC3201")) { | ||
| of_node_put(dn); | ||
| return 1; | ||
| } | ||
|
|
||
| reg = (unsigned int *) get_property(dn, "reg", ®len); | ||
| 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; | ||
| vendor->iobase = ioremap(address, size); | ||
| return 0; | ||
| } | ||
| #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 unsigned long atmel_get_base_addr(struct tpm_vendor_specific | ||
| *vendor) | ||
| { | ||
| int lo, hi; | ||
|
|
||
| if (atmel_verify_tpm11() != 0) | ||
| return 1; | ||
|
|
||
| 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 0; | ||
| } | ||
| #endif |