[PATCH] ppc64: tpm_infineon build fix
[linux-2.6.git] / drivers / char / tpm / tpm_atmel.c
1 /*
2  * Copyright (C) 2004 IBM Corporation
3  *
4  * Authors:
5  * Leendert van Doorn <leendert@watson.ibm.com>
6  * Dave Safford <safford@watson.ibm.com>
7  * Reiner Sailer <sailer@watson.ibm.com>
8  * Kylene Hall <kjhall@us.ibm.com>
9  *
10  * Maintained by: <tpmdd_devel@lists.sourceforge.net>
11  *
12  * Device driver for TCG/TCPA TPM (trusted platform module).
13  * Specifications at www.trustedcomputinggroup.org       
14  *
15  * This program is free software; you can redistribute it and/or
16  * modify it under the terms of the GNU General Public License as
17  * published by the Free Software Foundation, version 2 of the
18  * License.
19  * 
20  */
21
22 #include "tpm.h"
23
24 /* Atmel definitions */
25 enum tpm_atmel_addr {
26         TPM_ATMEL_BASE_ADDR_LO = 0x08,
27         TPM_ATMEL_BASE_ADDR_HI = 0x09
28 };
29
30 /* write status bits */
31 enum tpm_atmel_write_status {
32         ATML_STATUS_ABORT = 0x01,
33         ATML_STATUS_LASTBYTE = 0x04
34 };
35 /* read status bits */
36 enum tpm_atmel_read_status {
37         ATML_STATUS_BUSY = 0x01,
38         ATML_STATUS_DATA_AVAIL = 0x02,
39         ATML_STATUS_REWRITE = 0x04,
40         ATML_STATUS_READY = 0x08
41 };
42
43 static int tpm_atml_recv(struct tpm_chip *chip, u8 * buf, size_t count)
44 {
45         u8 status, *hdr = buf;
46         u32 size;
47         int i;
48         __be32 *native_size;
49
50         /* start reading header */
51         if (count < 6)
52                 return -EIO;
53
54         for (i = 0; i < 6; i++) {
55                 status = inb(chip->vendor->base + 1);
56                 if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
57                         dev_err(&chip->pci_dev->dev,
58                                 "error reading header\n");
59                         return -EIO;
60                 }
61                 *buf++ = inb(chip->vendor->base);
62         }
63
64         /* size of the data received */
65         native_size = (__force __be32 *) (hdr + 2);
66         size = be32_to_cpu(*native_size);
67
68         if (count < size) {
69                 dev_err(&chip->pci_dev->dev,
70                         "Recv size(%d) less than available space\n", size);
71                 for (; i < size; i++) { /* clear the waiting data anyway */
72                         status = inb(chip->vendor->base + 1);
73                         if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
74                                 dev_err(&chip->pci_dev->dev,
75                                         "error reading data\n");
76                                 return -EIO;
77                         }
78                 }
79                 return -EIO;
80         }
81
82         /* read all the data available */
83         for (; i < size; i++) {
84                 status = inb(chip->vendor->base + 1);
85                 if ((status & ATML_STATUS_DATA_AVAIL) == 0) {
86                         dev_err(&chip->pci_dev->dev,
87                                 "error reading data\n");
88                         return -EIO;
89                 }
90                 *buf++ = inb(chip->vendor->base);
91         }
92
93         /* make sure data available is gone */
94         status = inb(chip->vendor->base + 1);
95         if (status & ATML_STATUS_DATA_AVAIL) {
96                 dev_err(&chip->pci_dev->dev, "data available is stuck\n");
97                 return -EIO;
98         }
99
100         return size;
101 }
102
103 static int tpm_atml_send(struct tpm_chip *chip, u8 * buf, size_t count)
104 {
105         int i;
106
107         dev_dbg(&chip->pci_dev->dev, "tpm_atml_send: ");
108         for (i = 0; i < count; i++) {
109                 dev_dbg(&chip->pci_dev->dev, "0x%x(%d) ", buf[i], buf[i]);
110                 outb(buf[i], chip->vendor->base);
111         }
112
113         return count;
114 }
115
116 static void tpm_atml_cancel(struct tpm_chip *chip)
117 {
118         outb(ATML_STATUS_ABORT, chip->vendor->base + 1);
119 }
120
121 static struct file_operations atmel_ops = {
122         .owner = THIS_MODULE,
123         .llseek = no_llseek,
124         .open = tpm_open,
125         .read = tpm_read,
126         .write = tpm_write,
127         .release = tpm_release,
128 };
129
130 static DEVICE_ATTR(pubek, S_IRUGO, tpm_show_pubek, NULL);
131 static DEVICE_ATTR(pcrs, S_IRUGO, tpm_show_pcrs, NULL);
132 static DEVICE_ATTR(caps, S_IRUGO, tpm_show_caps, NULL);
133 static DEVICE_ATTR(cancel, S_IWUSR |S_IWGRP, NULL, tpm_store_cancel);
134
135 static struct attribute* atmel_attrs[] = {
136         &dev_attr_pubek.attr,
137         &dev_attr_pcrs.attr,
138         &dev_attr_caps.attr,
139         &dev_attr_cancel.attr,
140         0,
141 };
142
143 static struct attribute_group atmel_attr_grp = { .attrs = atmel_attrs };
144
145 static struct tpm_vendor_specific tpm_atmel = {
146         .recv = tpm_atml_recv,
147         .send = tpm_atml_send,
148         .cancel = tpm_atml_cancel,
149         .req_complete_mask = ATML_STATUS_BUSY | ATML_STATUS_DATA_AVAIL,
150         .req_complete_val = ATML_STATUS_DATA_AVAIL,
151         .req_canceled = ATML_STATUS_READY,
152         .attr_group = &atmel_attr_grp,
153         .miscdev = { .fops = &atmel_ops, },
154 };
155
156 static int __devinit tpm_atml_init(struct pci_dev *pci_dev,
157                                    const struct pci_device_id *pci_id)
158 {
159         u8 version[4];
160         int rc = 0;
161         int lo, hi;
162
163         if (pci_enable_device(pci_dev))
164                 return -EIO;
165
166         lo = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_LO);
167         hi = tpm_read_index(TPM_ADDR, TPM_ATMEL_BASE_ADDR_HI);
168
169         tpm_atmel.base = (hi<<8)|lo;
170         dev_dbg( &pci_dev->dev, "Operating with base: 0x%x\n", tpm_atmel.base);
171
172         /* verify that it is an Atmel part */
173         if (tpm_read_index(TPM_ADDR, 4) != 'A' || tpm_read_index(TPM_ADDR, 5) != 'T'
174             || tpm_read_index(TPM_ADDR, 6) != 'M' || tpm_read_index(TPM_ADDR, 7) != 'L') {
175                 rc = -ENODEV;
176                 goto out_err;
177         }
178
179         /* query chip for its version number */
180         if ((version[0] = tpm_read_index(TPM_ADDR, 0x00)) != 0xFF) {
181                 version[1] = tpm_read_index(TPM_ADDR, 0x01);
182                 version[2] = tpm_read_index(TPM_ADDR, 0x02);
183                 version[3] = tpm_read_index(TPM_ADDR, 0x03);
184         } else {
185                 dev_info(&pci_dev->dev, "version query failed\n");
186                 rc = -ENODEV;
187                 goto out_err;
188         }
189
190         if ((rc = tpm_register_hardware(pci_dev, &tpm_atmel)) < 0)
191                 goto out_err;
192
193         dev_info(&pci_dev->dev,
194                  "Atmel TPM version %d.%d.%d.%d\n", version[0], version[1],
195                  version[2], version[3]);
196
197         return 0;
198 out_err:
199         pci_disable_device(pci_dev);
200         return rc;
201 }
202
203 static struct pci_device_id tpm_pci_tbl[] __devinitdata = {
204         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0)},
205         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801CA_12)},
206         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0)},
207         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_12)},
208         {PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801EB_0)},
209         {PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_LPC)},
210         {PCI_DEVICE(PCI_VENDOR_ID_SERVERWORKS, PCI_DEVICE_ID_SERVERWORKS_CSB6LPC)},
211         {0,}
212 };
213
214 MODULE_DEVICE_TABLE(pci, tpm_pci_tbl);
215
216 static struct pci_driver atmel_pci_driver = {
217         .name = "tpm_atmel",
218         .id_table = tpm_pci_tbl,
219         .probe = tpm_atml_init,
220         .remove = __devexit_p(tpm_remove),
221         .suspend = tpm_pm_suspend,
222         .resume = tpm_pm_resume,
223 };
224
225 static int __init init_atmel(void)
226 {
227         return pci_register_driver(&atmel_pci_driver);
228 }
229
230 static void __exit cleanup_atmel(void)
231 {
232         pci_unregister_driver(&atmel_pci_driver);
233 }
234
235 module_init(init_atmel);
236 module_exit(cleanup_atmel);
237
238 MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)");
239 MODULE_DESCRIPTION("TPM Driver");
240 MODULE_VERSION("2.0");
241 MODULE_LICENSE("GPL");