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>
18 #include <linux/mmc/host.h>
19 #include <linux/mmc/card.h>
20 #include <linux/mmc/sdio.h>
21 #include <linux/mmc/sdio_func.h>
26 static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
27 const unsigned char *buf, unsigned size)
29 unsigned i, nr_strings;
30 char **buffer, *string;
36 for (i = 0; i < size; i++) {
43 if (buf[i-1] != '\0') {
44 printk(KERN_WARNING "SDIO: ignoring broken CISTPL_VERS_1\n");
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 };
101 static int cistpl_funce_common(struct mmc_card *card,
102 const unsigned char *buf, unsigned size)
104 if (size < 0x04 || buf[0] != 0)
107 /* TPLFE_FN0_BLK_SIZE */
108 card->cis.blksize = buf[1] | (buf[2] << 8);
110 /* TPLFE_MAX_TRAN_SPEED */
111 card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
112 speed_unit[buf[3] & 7];
117 static int cistpl_funce_func(struct sdio_func *func,
118 const unsigned char *buf, unsigned size)
123 vsn = func->card->cccr.sdio_vsn;
124 min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
126 if (size < min_size || buf[0] != 1)
129 /* TPLFE_MAX_BLK_SIZE */
130 func->max_blksize = buf[12] | (buf[13] << 8);
135 static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
136 const unsigned char *buf, unsigned size)
141 * There should be two versions of the CISTPL_FUNCE tuple,
142 * one for the common CIS (function 0) and a version used by
143 * the individual function's CIS (1-7). Yet, the later has a
144 * different length depending on the SDIO spec version.
147 ret = cistpl_funce_func(func, buf, size);
149 ret = cistpl_funce_common(card, buf, size);
152 printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u "
153 "type %u\n", mmc_hostname(card->host), size, buf[0]);
160 typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
161 const unsigned char *, unsigned);
165 unsigned char min_size;
169 static const struct cis_tpl cis_tpl_list[] = {
170 { 0x15, 3, cistpl_vers_1 },
171 { 0x20, 4, cistpl_manfid },
172 { 0x21, 2, /* cistpl_funcid */ },
173 { 0x22, 0, cistpl_funce },
176 static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
179 struct sdio_func_tuple *this, **prev;
183 * Note that this works for the common CIS (function number 0) as
184 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
185 * have the same offset.
187 for (i = 0; i < 3; i++) {
195 ret = mmc_io_rw_direct(card, 0, 0,
196 SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
203 prev = &func->tuples;
205 prev = &card->tuples;
210 unsigned char tpl_code, tpl_link;
212 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
216 /* 0xff means we're done */
217 if (tpl_code == 0xff)
220 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
224 this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
228 for (i = 0; i < tpl_link; i++) {
229 ret = mmc_io_rw_direct(card, 0, 0,
230 ptr + i, 0, &this->data[i]);
239 for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
240 if (cis_tpl_list[i].code == tpl_code)
242 if (i >= ARRAY_SIZE(cis_tpl_list)) {
243 /* this tuple is unknown to the core */
245 this->code = tpl_code;
246 this->size = tpl_link;
250 "%s: queuing CIS tuple 0x%02x length %u\n",
251 mmc_hostname(card->host), tpl_code, tpl_link);
253 const struct cis_tpl *tpl = cis_tpl_list + i;
254 if (tpl_link < tpl->min_size) {
256 "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n",
257 mmc_hostname(card->host),
258 tpl_code, tpl_link, tpl->min_size);
260 } else if (tpl->parse) {
261 ret = tpl->parse(card, func,
262 this->data, tpl_link);
271 * Link in all unknown tuples found in the common CIS so that
272 * drivers don't have to go digging in two places.
275 *prev = card->tuples;
280 int sdio_read_common_cis(struct mmc_card *card)
282 return sdio_read_cis(card, NULL);
285 void sdio_free_common_cis(struct mmc_card *card)
287 struct sdio_func_tuple *tuple, *victim;
289 tuple = card->tuples;
300 int sdio_read_func_cis(struct sdio_func *func)
304 ret = sdio_read_cis(func->card, func);
309 * Since we've linked to tuples in the card structure,
310 * we must make sure we have a reference to it.
312 get_device(&func->card->dev);
315 * Vendor/device id is optional for function CIS, so
316 * copy it from the card structure as needed.
318 if (func->vendor == 0) {
319 func->vendor = func->card->cis.vendor;
320 func->device = func->card->cis.device;
326 void sdio_free_func_cis(struct sdio_func *func)
328 struct sdio_func_tuple *tuple, *victim;
330 tuple = func->tuples;
332 while (tuple && tuple != func->card->tuples) {
341 * We have now removed the link to the tuples in the
342 * card structure, so remove the reference.
344 put_device(&func->card->dev);