2 * linux/drivers/mmc/core/sdio_cis.c
4 * Author: Nicolas Pitre
5 * Created: June 11, 2007
6 * Copyright: MontaVista Software Inc.
8 * Copyright 2007 Pierre Ossman
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
19 #include <linux/mmc/host.h>
20 #include <linux/mmc/card.h>
21 #include <linux/mmc/sdio.h>
22 #include <linux/mmc/sdio_func.h>
27 static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
28 const unsigned char *buf, unsigned size)
30 unsigned i, nr_strings;
31 char **buffer, *string;
33 /* Find all null-terminated (including zero length) strings in
34 the TPLLV1_INFO field. Trailing garbage is ignored. */
39 for (i = 0; i < size; i++) {
50 buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
54 string = (char*)(buffer + nr_strings);
56 for (i = 0; i < nr_strings; i++) {
59 string += strlen(string) + 1;
60 buf += strlen(buf) + 1;
64 func->num_info = nr_strings;
65 func->info = (const char**)buffer;
67 card->num_info = nr_strings;
68 card->info = (const char**)buffer;
74 static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
75 const unsigned char *buf, unsigned size)
77 unsigned int vendor, device;
80 vendor = buf[0] | (buf[1] << 8);
83 device = buf[2] | (buf[3] << 8);
86 func->vendor = vendor;
87 func->device = device;
89 card->cis.vendor = vendor;
90 card->cis.device = device;
96 static const unsigned char speed_val[16] =
97 { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
98 static const unsigned int speed_unit[8] =
99 { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
102 typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
103 const unsigned char *, unsigned);
107 unsigned char min_size;
111 static int cis_tpl_parse(struct mmc_card *card, struct sdio_func *func,
112 const char *tpl_descr,
113 const struct cis_tpl *tpl, int tpl_count,
115 const unsigned char *buf, unsigned size)
119 /* look for a matching code in the table */
120 for (i = 0; i < tpl_count; i++, tpl++) {
121 if (tpl->code == code)
125 if (size >= tpl->min_size) {
127 ret = tpl->parse(card, func, buf, size);
129 ret = -EILSEQ; /* known tuple, not parsed */
134 if (ret && ret != -EILSEQ && ret != -ENOENT) {
135 pr_err("%s: bad %s tuple 0x%02x (%u bytes)\n",
136 mmc_hostname(card->host), tpl_descr, code, size);
146 static int cistpl_funce_common(struct mmc_card *card, struct sdio_func *func,
147 const unsigned char *buf, unsigned size)
149 /* Only valid for the common CIS (function 0) */
153 /* TPLFE_FN0_BLK_SIZE */
154 card->cis.blksize = buf[1] | (buf[2] << 8);
156 /* TPLFE_MAX_TRAN_SPEED */
157 card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
158 speed_unit[buf[3] & 7];
163 static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
164 const unsigned char *buf, unsigned size)
169 /* Only valid for the individual function's CIS (1-7) */
174 * This tuple has a different length depending on the SDIO spec
177 vsn = func->card->cccr.sdio_vsn;
178 min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
183 /* TPLFE_MAX_BLK_SIZE */
184 func->max_blksize = buf[12] | (buf[13] << 8);
186 /* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
187 if (vsn > SDIO_SDIO_REV_1_00)
188 func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
190 func->enable_timeout = jiffies_to_msecs(HZ);
196 * Known TPLFE_TYPEs table for CISTPL_FUNCE tuples.
198 * Note that, unlike PCMCIA, CISTPL_FUNCE tuples are not parsed depending
199 * on the TPLFID_FUNCTION value of the previous CISTPL_FUNCID as on SDIO
200 * TPLFID_FUNCTION is always hardcoded to 0x0C.
202 static const struct cis_tpl cis_tpl_funce_list[] = {
203 { 0x00, 4, cistpl_funce_common },
204 { 0x01, 0, cistpl_funce_func },
205 { 0x04, 1+1+6, /* CISTPL_FUNCE_LAN_NODE_ID */ },
208 static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
209 const unsigned char *buf, unsigned size)
214 return cis_tpl_parse(card, func, "CISTPL_FUNCE",
216 ARRAY_SIZE(cis_tpl_funce_list),
220 /* Known TPL_CODEs table for CIS tuples */
221 static const struct cis_tpl cis_tpl_list[] = {
222 { 0x15, 3, cistpl_vers_1 },
223 { 0x20, 4, cistpl_manfid },
224 { 0x21, 2, /* cistpl_funcid */ },
225 { 0x22, 0, cistpl_funce },
228 static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
231 struct sdio_func_tuple *this, **prev;
235 * Note that this works for the common CIS (function number 0) as
236 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
237 * have the same offset.
239 for (i = 0; i < 3; i++) {
247 ret = mmc_io_rw_direct(card, 0, 0,
248 SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
255 prev = &func->tuples;
257 prev = &card->tuples;
262 unsigned char tpl_code, tpl_link;
264 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
268 /* 0xff means we're done */
269 if (tpl_code == 0xff)
272 /* null entries have no link field or data */
273 if (tpl_code == 0x00)
276 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
280 /* a size of 0xff also means we're done */
281 if (tpl_link == 0xff)
284 this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
288 for (i = 0; i < tpl_link; i++) {
289 ret = mmc_io_rw_direct(card, 0, 0,
290 ptr + i, 0, &this->data[i]);
299 /* Try to parse the CIS tuple */
300 ret = cis_tpl_parse(card, func, "CIS",
301 cis_tpl_list, ARRAY_SIZE(cis_tpl_list),
302 tpl_code, this->data, tpl_link);
303 if (ret == -EILSEQ || ret == -ENOENT) {
305 * The tuple is unknown or known but not parsed.
306 * Queue the tuple for the function driver.
309 this->code = tpl_code;
310 this->size = tpl_link;
314 if (ret == -ENOENT) {
315 /* warn about unknown tuples */
316 pr_warn_ratelimited("%s: queuing unknown"
317 " CIS tuple 0x%02x (%u bytes)\n",
318 mmc_hostname(card->host),
322 /* keep on analyzing tuples */
326 * We don't need the tuple anymore if it was
327 * successfully parsed by the SDIO core or if it is
328 * not going to be queued for a driver.
337 * Link in all unknown tuples found in the common CIS so that
338 * drivers don't have to go digging in two places.
341 *prev = card->tuples;
346 int sdio_read_common_cis(struct mmc_card *card)
348 return sdio_read_cis(card, NULL);
351 void sdio_free_common_cis(struct mmc_card *card)
353 struct sdio_func_tuple *tuple, *victim;
355 tuple = card->tuples;
366 int sdio_read_func_cis(struct sdio_func *func)
370 ret = sdio_read_cis(func->card, func);
375 * Since we've linked to tuples in the card structure,
376 * we must make sure we have a reference to it.
378 get_device(&func->card->dev);
381 * Vendor/device id is optional for function CIS, so
382 * copy it from the card structure as needed.
384 if (func->vendor == 0) {
385 func->vendor = func->card->cis.vendor;
386 func->device = func->card->cis.device;
392 void sdio_free_func_cis(struct sdio_func *func)
394 struct sdio_func_tuple *tuple, *victim;
396 tuple = func->tuples;
398 while (tuple && tuple != func->card->tuples) {
407 * We have now removed the link to the tuples in the
408 * card structure, so remove the reference.
410 put_device(&func->card->dev);