1ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall/* 2ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * Copyright (C) 2005 IBM Corporation 3ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 4ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * Authors: 5ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * Kylene Hall <kjhall@us.ibm.com> 6ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 78e81cc13a88ce486a6b0a6ca56aba6985824917aKent Yoder * Maintained by: <tpmdd-devel@lists.sourceforge.net> 8ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 9ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * Device driver for TCG/TCPA TPM (trusted platform module). 10ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * Specifications at www.trustedcomputinggroup.org 11ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 12ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * This program is free software; you can redistribute it and/or 13ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * modify it under the terms of the GNU General Public License as 14ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * published by the Free Software Foundation, version 2 of the 15ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * License. 16ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 17ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * These difference are required on power because the device must be 18ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * discovered through the device tree and iomap must be used to get 19ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * around the need for holes in the io_page_mask. This does not happen 20ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * automatically because the tpm is not a normal pci device and lives 21ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * under the root node. 22ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall * 23ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall */ 24ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 25ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#ifdef CONFIG_PPC64 26ddf526e992c1ea10e31478f4753fd717373f9e8bStephen Rothwell 27ddf526e992c1ea10e31478f4753fd717373f9e8bStephen Rothwell#include <asm/prom.h> 28ddf526e992c1ea10e31478f4753fd717373f9e8bStephen Rothwell 29ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_getb(chip, offset) readb(chip->vendor->iobase + offset); 30ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_putb(val, chip, offset) writeb(val, chip->vendor->iobase + offset) 31ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_request_region request_mem_region 32ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_release_region release_mem_region 3390612b308f2a2cc8aa08fbaf6f7184f5b7b5a855Kylene Jo Hall 34e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hallstatic inline void atmel_put_base_addr(void __iomem *iobase) 35ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall{ 36e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall iounmap(iobase); 37ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall} 38ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 39e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hallstatic void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size) 40ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall{ 41ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall struct device_node *dn; 42ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall unsigned long address, size; 435c339e96a391476ebb7cc63d913445c8cee092ffJeremy Kerr const unsigned int *reg; 44ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall int reglen; 45ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall int naddrc; 46ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall int nsizec; 47ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 48ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall dn = of_find_node_by_name(NULL, "tpm"); 49ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 50ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (!dn) 5190612b308f2a2cc8aa08fbaf6f7184f5b7b5a855Kylene Jo Hall return NULL; 52ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 5355b61fec22caa3e7872caea6c4100fc75cb8f49bStephen Rothwell if (!of_device_is_compatible(dn, "AT97SC3201")) { 54ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall of_node_put(dn); 5590612b308f2a2cc8aa08fbaf6f7184f5b7b5a855Kylene Jo Hall return NULL; 56ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall } 57ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 5840cd3a4564ed6b7bc0279430120ca0e9b83cf486Stephen Rothwell reg = of_get_property(dn, "reg", ®len); 59a8bda5dd4f99d6469f3c0dc362db3cce8a4d6416Stephen Rothwell naddrc = of_n_addr_cells(dn); 609213feea6e197f8507ec855337798cc3388f5570Stephen Rothwell nsizec = of_n_size_cells(dn); 61ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 62ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall of_node_put(dn); 63ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 64ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 65ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (naddrc == 2) 66ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall address = ((unsigned long) reg[0] << 32) | reg[1]; 67ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall else 68ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall address = reg[0]; 69ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 70ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (nsizec == 2) 71ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall size = 72ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall ((unsigned long) reg[naddrc] << 32) | reg[naddrc + 1]; 73ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall else 74ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall size = reg[naddrc]; 75ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 76e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall *base = address; 77e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall *region_size = size; 78e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall return ioremap(*base, *region_size); 79ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall} 80ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#else 81ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_getb(chip, offset) inb(chip->vendor->base + offset) 82ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_putb(val, chip, offset) outb(val, chip->vendor->base + offset) 83ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_request_region request_region 84ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#define atmel_release_region release_region 85ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall/* Atmel definitions */ 86ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hallenum tpm_atmel_addr { 87ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall TPM_ATMEL_BASE_ADDR_LO = 0x08, 88ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall TPM_ATMEL_BASE_ADDR_HI = 0x09 89ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall}; 90ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 91ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall/* Verify this is a 1.1 Atmel TPM */ 92ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hallstatic int atmel_verify_tpm11(void) 93ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall{ 94ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 95ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall /* verify that it is an Atmel part */ 96ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (tpm_read_index(TPM_ADDR, 4) != 'A' || 97ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall tpm_read_index(TPM_ADDR, 5) != 'T' || 98ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall tpm_read_index(TPM_ADDR, 6) != 'M' || 99ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall tpm_read_index(TPM_ADDR, 7) != 'L') 100ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall return 1; 101ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 102ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall /* query chip for its version number */ 103ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (tpm_read_index(TPM_ADDR, 0x00) != 1 || 104ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall tpm_read_index(TPM_ADDR, 0x01) != 1) 105ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall return 1; 106ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 107ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall /* This is an atmel supported part */ 108ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall return 0; 109ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall} 110ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 111e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hallstatic inline void atmel_put_base_addr(void __iomem *iobase) 112ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall{ 113ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall} 114ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 115ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall/* Determine where to talk to device */ 116e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hallstatic void __iomem * atmel_get_base_addr(unsigned long *base, int *region_size) 117ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall{ 118ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall int lo, hi; 119ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 120ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall if (atmel_verify_tpm11() != 0) 12190612b308f2a2cc8aa08fbaf6f7184f5b7b5a855Kylene Jo Hall return NULL; 122ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 123ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO); 124ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI); 125ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 126e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall *base = (hi << 8) | lo; 127e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall *region_size = 2; 128ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall 129e0dd03caf20d040a0a86b6bd74028ec9bda545f5Kylene Jo Hall return ioport_map(*base, *region_size); 130ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall} 131ad5ea3cc5f745aef243ade0dafc8cf6f7f0bfea7Kylene Jo Hall#endif 132