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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/mmc/core/sdio_cis.c
4 *
5 * Author: Nicolas Pitre
6 * Created: June 11, 2007
7 * Copyright: MontaVista Software Inc.
8 *
9 * Copyright 2007 Pierre Ossman
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14
15#include <linux/mmc/host.h>
16#include <linux/mmc/card.h>
17#include <linux/mmc/sdio.h>
18#include <linux/mmc/sdio_func.h>
19
20#include "sdio_cis.h"
21#include "sdio_ops.h"
22
23#define SDIO_READ_CIS_TIMEOUT_MS (10 * 1000) /* 10s */
24
25static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
26 const unsigned char *buf, unsigned size)
27{
28 u8 major_rev, minor_rev;
29 unsigned i, nr_strings;
30 char **buffer, *string;
31
32 if (size < 2)
33 return 0;
34
35 major_rev = buf[0];
36 minor_rev = buf[1];
37
38 /* Find all null-terminated (including zero length) strings in
39 the TPLLV1_INFO field. Trailing garbage is ignored. */
40 buf += 2;
41 size -= 2;
42
43 nr_strings = 0;
44 for (i = 0; i < size; i++) {
45 if (buf[i] == 0xff)
46 break;
47 if (buf[i] == 0)
48 nr_strings++;
49 }
50 if (nr_strings == 0)
51 return 0;
52
53 size = i;
54
55 buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
56 if (!buffer)
57 return -ENOMEM;
58
59 string = (char*)(buffer + nr_strings);
60
61 for (i = 0; i < nr_strings; i++) {
62 buffer[i] = string;
63 strcpy(string, buf);
64 string += strlen(string) + 1;
65 buf += strlen(buf) + 1;
66 }
67
68 if (func) {
69 func->major_rev = major_rev;
70 func->minor_rev = minor_rev;
71 func->num_info = nr_strings;
72 func->info = (const char**)buffer;
73 } else {
74 card->major_rev = major_rev;
75 card->minor_rev = minor_rev;
76 card->num_info = nr_strings;
77 card->info = (const char**)buffer;
78 }
79
80 return 0;
81}
82
83static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
84 const unsigned char *buf, unsigned size)
85{
86 unsigned int vendor, device;
87
88 /* TPLMID_MANF */
89 vendor = buf[0] | (buf[1] << 8);
90
91 /* TPLMID_CARD */
92 device = buf[2] | (buf[3] << 8);
93
94 if (func) {
95 func->vendor = vendor;
96 func->device = device;
97 } else {
98 card->cis.vendor = vendor;
99 card->cis.device = device;
100 }
101
102 return 0;
103}
104
105static const unsigned char speed_val[16] =
106 { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
107static const unsigned int speed_unit[8] =
108 { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
109
110
111typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
112 const unsigned char *, unsigned);
113
114struct cis_tpl {
115 unsigned char code;
116 unsigned char min_size;
117 tpl_parse_t *parse;
118};
119
120static int cis_tpl_parse(struct mmc_card *card, struct sdio_func *func,
121 const char *tpl_descr,
122 const struct cis_tpl *tpl, int tpl_count,
123 unsigned char code,
124 const unsigned char *buf, unsigned size)
125{
126 int i, ret;
127
128 /* look for a matching code in the table */
129 for (i = 0; i < tpl_count; i++, tpl++) {
130 if (tpl->code == code)
131 break;
132 }
133 if (i < tpl_count) {
134 if (size >= tpl->min_size) {
135 if (tpl->parse)
136 ret = tpl->parse(card, func, buf, size);
137 else
138 ret = -EILSEQ; /* known tuple, not parsed */
139 } else {
140 /* invalid tuple */
141 ret = -EINVAL;
142 }
143 if (ret && ret != -EILSEQ && ret != -ENOENT) {
144 pr_err("%s: bad %s tuple 0x%02x (%u bytes)\n",
145 mmc_hostname(card->host), tpl_descr, code, size);
146 }
147 } else {
148 /* unknown tuple */
149 ret = -ENOENT;
150 }
151
152 return ret;
153}
154
155static int cistpl_funce_common(struct mmc_card *card, struct sdio_func *func,
156 const unsigned char *buf, unsigned size)
157{
158 /* Only valid for the common CIS (function 0) */
159 if (func)
160 return -EINVAL;
161
162 /* TPLFE_FN0_BLK_SIZE */
163 card->cis.blksize = buf[1] | (buf[2] << 8);
164
165 /* TPLFE_MAX_TRAN_SPEED */
166 card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
167 speed_unit[buf[3] & 7];
168
169 return 0;
170}
171
172static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
173 const unsigned char *buf, unsigned size)
174{
175 unsigned vsn;
176 unsigned min_size;
177
178 /* Only valid for the individual function's CIS (1-7) */
179 if (!func)
180 return -EINVAL;
181
182 /*
183 * This tuple has a different length depending on the SDIO spec
184 * version.
185 */
186 vsn = func->card->cccr.sdio_vsn;
187 min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
188
189 if (size == 28 && vsn == SDIO_SDIO_REV_1_10) {
190 pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
191 mmc_hostname(card->host));
192 vsn = SDIO_SDIO_REV_1_00;
193 } else if (size < min_size) {
194 return -EINVAL;
195 }
196
197 /* TPLFE_MAX_BLK_SIZE */
198 func->max_blksize = buf[12] | (buf[13] << 8);
199
200 /* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
201 if (vsn > SDIO_SDIO_REV_1_00)
202 func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
203 else
204 func->enable_timeout = jiffies_to_msecs(HZ);
205
206 return 0;
207}
208
209/*
210 * Known TPLFE_TYPEs table for CISTPL_FUNCE tuples.
211 *
212 * Note that, unlike PCMCIA, CISTPL_FUNCE tuples are not parsed depending
213 * on the TPLFID_FUNCTION value of the previous CISTPL_FUNCID as on SDIO
214 * TPLFID_FUNCTION is always hardcoded to 0x0C.
215 */
216static const struct cis_tpl cis_tpl_funce_list[] = {
217 { 0x00, 4, cistpl_funce_common },
218 { 0x01, 0, cistpl_funce_func },
219 { 0x04, 1+1+6, /* CISTPL_FUNCE_LAN_NODE_ID */ },
220};
221
222static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
223 const unsigned char *buf, unsigned size)
224{
225 if (size < 1)
226 return -EINVAL;
227
228 return cis_tpl_parse(card, func, "CISTPL_FUNCE",
229 cis_tpl_funce_list,
230 ARRAY_SIZE(cis_tpl_funce_list),
231 buf[0], buf, size);
232}
233
234/* Known TPL_CODEs table for CIS tuples */
235static const struct cis_tpl cis_tpl_list[] = {
236 { 0x15, 3, cistpl_vers_1 },
237 { 0x20, 4, cistpl_manfid },
238 { 0x21, 2, /* cistpl_funcid */ },
239 { 0x22, 0, cistpl_funce },
240 { 0x91, 2, /* cistpl_sdio_std */ },
241};
242
243static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
244{
245 int ret;
246 struct sdio_func_tuple *this, **prev;
247 unsigned i, ptr = 0;
248
249 /*
250 * Note that this works for the common CIS (function number 0) as
251 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
252 * have the same offset.
253 */
254 for (i = 0; i < 3; i++) {
255 unsigned char x, fn;
256
257 if (func)
258 fn = func->num;
259 else
260 fn = 0;
261
262 ret = mmc_io_rw_direct(card, 0, 0,
263 SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
264 if (ret)
265 return ret;
266 ptr |= x << (i * 8);
267 }
268
269 if (func)
270 prev = &func->tuples;
271 else
272 prev = &card->tuples;
273
274 if (*prev)
275 return -EINVAL;
276
277 do {
278 unsigned char tpl_code, tpl_link;
279 unsigned long timeout = jiffies +
280 msecs_to_jiffies(SDIO_READ_CIS_TIMEOUT_MS);
281
282 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
283 if (ret)
284 break;
285
286 /* 0xff means we're done */
287 if (tpl_code == 0xff)
288 break;
289
290 /* null entries have no link field or data */
291 if (tpl_code == 0x00)
292 continue;
293
294 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
295 if (ret)
296 break;
297
298 /* a size of 0xff also means we're done */
299 if (tpl_link == 0xff)
300 break;
301
302 this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
303 if (!this)
304 return -ENOMEM;
305
306 for (i = 0; i < tpl_link; i++) {
307 ret = mmc_io_rw_direct(card, 0, 0,
308 ptr + i, 0, &this->data[i]);
309 if (ret)
310 break;
311 }
312 if (ret) {
313 kfree(this);
314 break;
315 }
316
317 /* Try to parse the CIS tuple */
318 ret = cis_tpl_parse(card, func, "CIS",
319 cis_tpl_list, ARRAY_SIZE(cis_tpl_list),
320 tpl_code, this->data, tpl_link);
321 if (ret == -EILSEQ || ret == -ENOENT) {
322 /*
323 * The tuple is unknown or known but not parsed.
324 * Queue the tuple for the function driver.
325 */
326 this->next = NULL;
327 this->code = tpl_code;
328 this->size = tpl_link;
329 *prev = this;
330 prev = &this->next;
331
332 if (ret == -ENOENT) {
333
334 if (time_after(jiffies, timeout))
335 break;
336
337#define FMT(type) "%s: queuing " type " CIS tuple 0x%02x [%*ph] (%u bytes)\n"
338 /*
339 * Tuples in this range are reserved for
340 * vendors, so don't warn about them
341 */
342 if (tpl_code >= 0x80 && tpl_code <= 0x8f)
343 pr_debug_ratelimited(FMT("vendor"),
344 mmc_hostname(card->host),
345 tpl_code, tpl_link, this->data,
346 tpl_link);
347 else
348 pr_warn_ratelimited(FMT("unknown"),
349 mmc_hostname(card->host),
350 tpl_code, tpl_link, this->data,
351 tpl_link);
352 }
353
354 /* keep on analyzing tuples */
355 ret = 0;
356 } else {
357 /*
358 * We don't need the tuple anymore if it was
359 * successfully parsed by the SDIO core or if it is
360 * not going to be queued for a driver.
361 */
362 kfree(this);
363 }
364
365 ptr += tpl_link;
366 } while (!ret);
367
368 /*
369 * Link in all unknown tuples found in the common CIS so that
370 * drivers don't have to go digging in two places.
371 */
372 if (func)
373 *prev = card->tuples;
374
375 return ret;
376}
377
378int sdio_read_common_cis(struct mmc_card *card)
379{
380 return sdio_read_cis(card, NULL);
381}
382
383void sdio_free_common_cis(struct mmc_card *card)
384{
385 struct sdio_func_tuple *tuple, *victim;
386
387 tuple = card->tuples;
388
389 while (tuple) {
390 victim = tuple;
391 tuple = tuple->next;
392 kfree(victim);
393 }
394
395 card->tuples = NULL;
396}
397
398int sdio_read_func_cis(struct sdio_func *func)
399{
400 int ret;
401
402 ret = sdio_read_cis(func->card, func);
403 if (ret)
404 return ret;
405
406 /*
407 * Vendor/device id is optional for function CIS, so
408 * copy it from the card structure as needed.
409 */
410 if (func->vendor == 0) {
411 func->vendor = func->card->cis.vendor;
412 func->device = func->card->cis.device;
413 }
414
415 return 0;
416}
417
418void sdio_free_func_cis(struct sdio_func *func)
419{
420 struct sdio_func_tuple *tuple, *victim;
421
422 tuple = func->tuples;
423
424 while (tuple && tuple != func->card->tuples) {
425 victim = tuple;
426 tuple = tuple->next;
427 kfree(victim);
428 }
429
430 func->tuples = NULL;
431}
432
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * linux/drivers/mmc/core/sdio_cis.c
4 *
5 * Author: Nicolas Pitre
6 * Created: June 11, 2007
7 * Copyright: MontaVista Software Inc.
8 *
9 * Copyright 2007 Pierre Ossman
10 */
11
12#include <linux/kernel.h>
13#include <linux/slab.h>
14
15#include <linux/mmc/host.h>
16#include <linux/mmc/card.h>
17#include <linux/mmc/sdio.h>
18#include <linux/mmc/sdio_func.h>
19
20#include "sdio_cis.h"
21#include "sdio_ops.h"
22
23static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
24 const unsigned char *buf, unsigned size)
25{
26 unsigned i, nr_strings;
27 char **buffer, *string;
28
29 /* Find all null-terminated (including zero length) strings in
30 the TPLLV1_INFO field. Trailing garbage is ignored. */
31 buf += 2;
32 size -= 2;
33
34 nr_strings = 0;
35 for (i = 0; i < size; i++) {
36 if (buf[i] == 0xff)
37 break;
38 if (buf[i] == 0)
39 nr_strings++;
40 }
41 if (nr_strings == 0)
42 return 0;
43
44 size = i;
45
46 buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
47 if (!buffer)
48 return -ENOMEM;
49
50 string = (char*)(buffer + nr_strings);
51
52 for (i = 0; i < nr_strings; i++) {
53 buffer[i] = string;
54 strcpy(string, buf);
55 string += strlen(string) + 1;
56 buf += strlen(buf) + 1;
57 }
58
59 if (func) {
60 func->num_info = nr_strings;
61 func->info = (const char**)buffer;
62 } else {
63 card->num_info = nr_strings;
64 card->info = (const char**)buffer;
65 }
66
67 return 0;
68}
69
70static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
71 const unsigned char *buf, unsigned size)
72{
73 unsigned int vendor, device;
74
75 /* TPLMID_MANF */
76 vendor = buf[0] | (buf[1] << 8);
77
78 /* TPLMID_CARD */
79 device = buf[2] | (buf[3] << 8);
80
81 if (func) {
82 func->vendor = vendor;
83 func->device = device;
84 } else {
85 card->cis.vendor = vendor;
86 card->cis.device = device;
87 }
88
89 return 0;
90}
91
92static const unsigned char speed_val[16] =
93 { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
94static const unsigned int speed_unit[8] =
95 { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
96
97
98typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
99 const unsigned char *, unsigned);
100
101struct cis_tpl {
102 unsigned char code;
103 unsigned char min_size;
104 tpl_parse_t *parse;
105};
106
107static int cis_tpl_parse(struct mmc_card *card, struct sdio_func *func,
108 const char *tpl_descr,
109 const struct cis_tpl *tpl, int tpl_count,
110 unsigned char code,
111 const unsigned char *buf, unsigned size)
112{
113 int i, ret;
114
115 /* look for a matching code in the table */
116 for (i = 0; i < tpl_count; i++, tpl++) {
117 if (tpl->code == code)
118 break;
119 }
120 if (i < tpl_count) {
121 if (size >= tpl->min_size) {
122 if (tpl->parse)
123 ret = tpl->parse(card, func, buf, size);
124 else
125 ret = -EILSEQ; /* known tuple, not parsed */
126 } else {
127 /* invalid tuple */
128 ret = -EINVAL;
129 }
130 if (ret && ret != -EILSEQ && ret != -ENOENT) {
131 pr_err("%s: bad %s tuple 0x%02x (%u bytes)\n",
132 mmc_hostname(card->host), tpl_descr, code, size);
133 }
134 } else {
135 /* unknown tuple */
136 ret = -ENOENT;
137 }
138
139 return ret;
140}
141
142static int cistpl_funce_common(struct mmc_card *card, struct sdio_func *func,
143 const unsigned char *buf, unsigned size)
144{
145 /* Only valid for the common CIS (function 0) */
146 if (func)
147 return -EINVAL;
148
149 /* TPLFE_FN0_BLK_SIZE */
150 card->cis.blksize = buf[1] | (buf[2] << 8);
151
152 /* TPLFE_MAX_TRAN_SPEED */
153 card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
154 speed_unit[buf[3] & 7];
155
156 return 0;
157}
158
159static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
160 const unsigned char *buf, unsigned size)
161{
162 unsigned vsn;
163 unsigned min_size;
164
165 /* Only valid for the individual function's CIS (1-7) */
166 if (!func)
167 return -EINVAL;
168
169 /*
170 * This tuple has a different length depending on the SDIO spec
171 * version.
172 */
173 vsn = func->card->cccr.sdio_vsn;
174 min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
175
176 if (size == 28 && vsn == SDIO_SDIO_REV_1_10) {
177 pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
178 mmc_hostname(card->host));
179 vsn = SDIO_SDIO_REV_1_00;
180 } else if (size < min_size) {
181 return -EINVAL;
182 }
183
184 /* TPLFE_MAX_BLK_SIZE */
185 func->max_blksize = buf[12] | (buf[13] << 8);
186
187 /* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
188 if (vsn > SDIO_SDIO_REV_1_00)
189 func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
190 else
191 func->enable_timeout = jiffies_to_msecs(HZ);
192
193 return 0;
194}
195
196/*
197 * Known TPLFE_TYPEs table for CISTPL_FUNCE tuples.
198 *
199 * Note that, unlike PCMCIA, CISTPL_FUNCE tuples are not parsed depending
200 * on the TPLFID_FUNCTION value of the previous CISTPL_FUNCID as on SDIO
201 * TPLFID_FUNCTION is always hardcoded to 0x0C.
202 */
203static const struct cis_tpl cis_tpl_funce_list[] = {
204 { 0x00, 4, cistpl_funce_common },
205 { 0x01, 0, cistpl_funce_func },
206 { 0x04, 1+1+6, /* CISTPL_FUNCE_LAN_NODE_ID */ },
207};
208
209static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
210 const unsigned char *buf, unsigned size)
211{
212 if (size < 1)
213 return -EINVAL;
214
215 return cis_tpl_parse(card, func, "CISTPL_FUNCE",
216 cis_tpl_funce_list,
217 ARRAY_SIZE(cis_tpl_funce_list),
218 buf[0], buf, size);
219}
220
221/* Known TPL_CODEs table for CIS tuples */
222static const struct cis_tpl cis_tpl_list[] = {
223 { 0x15, 3, cistpl_vers_1 },
224 { 0x20, 4, cistpl_manfid },
225 { 0x21, 2, /* cistpl_funcid */ },
226 { 0x22, 0, cistpl_funce },
227 { 0x91, 2, /* cistpl_sdio_std */ },
228};
229
230static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
231{
232 int ret;
233 struct sdio_func_tuple *this, **prev;
234 unsigned i, ptr = 0;
235
236 /*
237 * Note that this works for the common CIS (function number 0) as
238 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
239 * have the same offset.
240 */
241 for (i = 0; i < 3; i++) {
242 unsigned char x, fn;
243
244 if (func)
245 fn = func->num;
246 else
247 fn = 0;
248
249 ret = mmc_io_rw_direct(card, 0, 0,
250 SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
251 if (ret)
252 return ret;
253 ptr |= x << (i * 8);
254 }
255
256 if (func)
257 prev = &func->tuples;
258 else
259 prev = &card->tuples;
260
261 if (*prev)
262 return -EINVAL;
263
264 do {
265 unsigned char tpl_code, tpl_link;
266
267 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
268 if (ret)
269 break;
270
271 /* 0xff means we're done */
272 if (tpl_code == 0xff)
273 break;
274
275 /* null entries have no link field or data */
276 if (tpl_code == 0x00)
277 continue;
278
279 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
280 if (ret)
281 break;
282
283 /* a size of 0xff also means we're done */
284 if (tpl_link == 0xff)
285 break;
286
287 this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
288 if (!this)
289 return -ENOMEM;
290
291 for (i = 0; i < tpl_link; i++) {
292 ret = mmc_io_rw_direct(card, 0, 0,
293 ptr + i, 0, &this->data[i]);
294 if (ret)
295 break;
296 }
297 if (ret) {
298 kfree(this);
299 break;
300 }
301
302 /* Try to parse the CIS tuple */
303 ret = cis_tpl_parse(card, func, "CIS",
304 cis_tpl_list, ARRAY_SIZE(cis_tpl_list),
305 tpl_code, this->data, tpl_link);
306 if (ret == -EILSEQ || ret == -ENOENT) {
307 /*
308 * The tuple is unknown or known but not parsed.
309 * Queue the tuple for the function driver.
310 */
311 this->next = NULL;
312 this->code = tpl_code;
313 this->size = tpl_link;
314 *prev = this;
315 prev = &this->next;
316
317 if (ret == -ENOENT) {
318 /* warn about unknown tuples */
319 pr_warn_ratelimited("%s: queuing unknown"
320 " CIS tuple 0x%02x (%u bytes)\n",
321 mmc_hostname(card->host),
322 tpl_code, tpl_link);
323 }
324
325 /* keep on analyzing tuples */
326 ret = 0;
327 } else {
328 /*
329 * We don't need the tuple anymore if it was
330 * successfully parsed by the SDIO core or if it is
331 * not going to be queued for a driver.
332 */
333 kfree(this);
334 }
335
336 ptr += tpl_link;
337 } while (!ret);
338
339 /*
340 * Link in all unknown tuples found in the common CIS so that
341 * drivers don't have to go digging in two places.
342 */
343 if (func)
344 *prev = card->tuples;
345
346 return ret;
347}
348
349int sdio_read_common_cis(struct mmc_card *card)
350{
351 return sdio_read_cis(card, NULL);
352}
353
354void sdio_free_common_cis(struct mmc_card *card)
355{
356 struct sdio_func_tuple *tuple, *victim;
357
358 tuple = card->tuples;
359
360 while (tuple) {
361 victim = tuple;
362 tuple = tuple->next;
363 kfree(victim);
364 }
365
366 card->tuples = NULL;
367}
368
369int sdio_read_func_cis(struct sdio_func *func)
370{
371 int ret;
372
373 ret = sdio_read_cis(func->card, func);
374 if (ret)
375 return ret;
376
377 /*
378 * Since we've linked to tuples in the card structure,
379 * we must make sure we have a reference to it.
380 */
381 get_device(&func->card->dev);
382
383 /*
384 * Vendor/device id is optional for function CIS, so
385 * copy it from the card structure as needed.
386 */
387 if (func->vendor == 0) {
388 func->vendor = func->card->cis.vendor;
389 func->device = func->card->cis.device;
390 }
391
392 return 0;
393}
394
395void sdio_free_func_cis(struct sdio_func *func)
396{
397 struct sdio_func_tuple *tuple, *victim;
398
399 tuple = func->tuples;
400
401 while (tuple && tuple != func->card->tuples) {
402 victim = tuple;
403 tuple = tuple->next;
404 kfree(victim);
405 }
406
407 func->tuples = NULL;
408
409 /*
410 * We have now removed the link to the tuples in the
411 * card structure, so remove the reference.
412 */
413 put_device(&func->card->dev);
414}
415