2 * Copyright (c) 2012 Intel Corporation. All rights reserved.
3 * Copyright (c) 2006 - 2012 QLogic Corporation. All rights reserved.
4 * Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
6 * This software is available to you under a choice of one of two
7 * licenses. You may choose to be licensed under the terms of the GNU
8 * General Public License (GPL) Version 2, available from the file
9 * COPYING in the main directory of this source tree, or the
10 * OpenIB.org BSD license below:
12 * Redistribution and use in source and binary forms, with or
13 * without modification, are permitted provided that the following
16 * - Redistributions of source code must retain the above
17 * copyright notice, this list of conditions and the following
20 * - Redistributions in binary form must reproduce the above
21 * copyright notice, this list of conditions and the following
22 * disclaimer in the documentation and/or other materials
23 * provided with the distribution.
25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
35 #include <linux/delay.h>
36 #include <linux/pci.h>
37 #include <linux/vmalloc.h>
42 * Functions specific to the serial EEPROM on cards handled by ib_qib.
43 * The actual serail interface code is in qib_twsi.c. This file is a client
47 * qib_eeprom_read - receives bytes from the eeprom via I2C
48 * @dd: the qlogic_ib device
49 * @eeprom_offset: address to read from
50 * @buffer: where to store result
51 * @len: number of bytes to receive
53 int qib_eeprom_read(struct qib_devdata *dd, u8 eeprom_offset,
58 ret = mutex_lock_interruptible(&dd->eep_lock);
60 ret = qib_twsi_reset(dd);
62 qib_dev_err(dd, "EEPROM Reset for read failed\n");
64 ret = qib_twsi_blk_rd(dd, dd->twsi_eeprom_dev,
65 eeprom_offset, buff, len);
66 mutex_unlock(&dd->eep_lock);
73 * Actually update the eeprom, first doing write enable if
74 * needed, then restoring write enable state.
75 * Must be called with eep_lock held
77 static int eeprom_write_with_enable(struct qib_devdata *dd, u8 offset,
78 const void *buf, int len)
82 pwen = dd->f_eeprom_wen(dd, 1);
83 ret = qib_twsi_reset(dd);
85 qib_dev_err(dd, "EEPROM Reset for write failed\n");
87 ret = qib_twsi_blk_wr(dd, dd->twsi_eeprom_dev,
89 dd->f_eeprom_wen(dd, pwen);
94 * qib_eeprom_write - writes data to the eeprom via I2C
95 * @dd: the qlogic_ib device
96 * @eeprom_offset: where to place data
97 * @buffer: data to write
98 * @len: number of bytes to write
100 int qib_eeprom_write(struct qib_devdata *dd, u8 eeprom_offset,
101 const void *buff, int len)
105 ret = mutex_lock_interruptible(&dd->eep_lock);
107 ret = eeprom_write_with_enable(dd, eeprom_offset, buff, len);
108 mutex_unlock(&dd->eep_lock);
114 static u8 flash_csum(struct qib_flash *ifp, int adjust)
120 * Limit length checksummed to max length of actual data.
121 * Checksum of erased eeprom will still be bad, but we avoid
122 * reading past the end of the buffer we were passed.
124 len = ifp->if_length;
125 if (len > sizeof(struct qib_flash))
126 len = sizeof(struct qib_flash);
129 csum -= ifp->if_csum;
138 * qib_get_eeprom_info- get the GUID et al. from the TSWI EEPROM device
139 * @dd: the qlogic_ib device
141 * We have the capability to use the nguid field, and get
142 * the guid from the first chip's flash, to use for all of them.
144 void qib_get_eeprom_info(struct qib_devdata *dd)
147 struct qib_flash *ifp;
152 struct qib_devdata *dd0 = qib_lookup(0);
154 if (t && dd0->nguid > 1 && t <= dd0->nguid) {
157 dd->base_guid = dd0->base_guid;
158 bguid = (u8 *) &dd->base_guid;
162 if (oguid > bguid[7]) {
163 if (bguid[6] == 0xff) {
164 if (bguid[5] == 0xff) {
166 "Can't set %s GUID from base, wraps to OUI!\n",
167 qib_get_unit_name(t));
180 * Read full flash, not just currently used part, since it may have
181 * been written with a newer definition.
183 len = sizeof(struct qib_flash);
187 "Couldn't allocate memory to read %u bytes from eeprom for GUID\n",
193 * Use "public" eeprom read function, which does locking and
194 * figures out device. This will migrate to chip-specific.
196 eep_stat = qib_eeprom_read(dd, 0, buf, len);
199 qib_dev_err(dd, "Failed reading GUID from eeprom\n");
202 ifp = (struct qib_flash *)buf;
204 csum = flash_csum(ifp, 0);
205 if (csum != ifp->if_csum) {
206 qib_devinfo(dd->pcidev,
207 "Bad I2C flash checksum: 0x%x, not 0x%x\n",
211 if (*(__be64 *) ifp->if_guid == cpu_to_be64(0) ||
212 *(__be64 *) ifp->if_guid == ~cpu_to_be64(0)) {
214 "Invalid GUID %llx from flash; ignoring\n",
215 *(unsigned long long *) ifp->if_guid);
216 /* don't allow GUID if all 0 or all 1's */
220 /* complain, but allow it */
221 if (*(u64 *) ifp->if_guid == 0x100007511000000ULL)
222 qib_devinfo(dd->pcidev,
223 "Warning, GUID %llx is default, probably not correct!\n",
224 *(unsigned long long *) ifp->if_guid);
226 bguid = ifp->if_guid;
227 if (!bguid[0] && !bguid[1] && !bguid[2]) {
229 * Original incorrect GUID format in flash; fix in
230 * core copy, by shifting up 2 octets; don't need to
231 * change top octet, since both it and shifted are 0.
237 guid = *(__be64 *) ifp->if_guid;
239 guid = *(__be64 *) ifp->if_guid;
240 dd->base_guid = guid;
241 dd->nguid = ifp->if_numguid;
243 * Things are slightly complicated by the desire to transparently
244 * support both the Pathscale 10-digit serial number and the QLogic
245 * 13-character version.
247 if ((ifp->if_fversion > 1) && ifp->if_sprefix[0] &&
248 ((u8 *) ifp->if_sprefix)[0] != 0xFF) {
249 char *snp = dd->serial;
252 * This board has a Serial-prefix, which is stored
253 * elsewhere for backward-compatibility.
255 memcpy(snp, ifp->if_sprefix, sizeof(ifp->if_sprefix));
256 snp[sizeof(ifp->if_sprefix)] = '\0';
259 len = sizeof(dd->serial) - len;
260 if (len > sizeof(ifp->if_serial))
261 len = sizeof(ifp->if_serial);
262 memcpy(snp, ifp->if_serial, len);
264 memcpy(dd->serial, ifp->if_serial, sizeof(ifp->if_serial));
266 if (!strstr(ifp->if_comment, "Tested successfully"))
268 "Board SN %s did not pass functional test: %s\n",
269 dd->serial, ifp->if_comment);