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_manfid(struct mmc_card *card, struct sdio_func *func,
27 const unsigned char *buf, unsigned size)
29 unsigned int vendor, device;
32 vendor = buf[0] | (buf[1] << 8);
35 device = buf[2] | (buf[3] << 8);
38 func->vendor = vendor;
39 func->device = device;
41 card->cis.vendor = vendor;
42 card->cis.device = device;
48 static const unsigned char speed_val[16] =
49 { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
50 static const unsigned int speed_unit[8] =
51 { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
53 static int cistpl_funce_common(struct mmc_card *card,
54 const unsigned char *buf, unsigned size)
56 if (size < 0x04 || buf[0] != 0)
59 /* TPLFE_FN0_BLK_SIZE */
60 card->cis.blksize = buf[1] | (buf[2] << 8);
62 /* TPLFE_MAX_TRAN_SPEED */
63 card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
64 speed_unit[buf[3] & 7];
69 static int cistpl_funce_func(struct sdio_func *func,
70 const unsigned char *buf, unsigned size)
75 vsn = func->card->cccr.sdio_vsn;
76 min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
78 if (size < min_size || buf[0] != 1)
81 /* TPLFE_MAX_BLK_SIZE */
82 func->max_blksize = buf[12] | (buf[13] << 8);
87 static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
88 const unsigned char *buf, unsigned size)
93 * There should be two versions of the CISTPL_FUNCE tuple,
94 * one for the common CIS (function 0) and a version used by
95 * the individual function's CIS (1-7). Yet, the later has a
96 * different length depending on the SDIO spec version.
99 ret = cistpl_funce_func(func, buf, size);
101 ret = cistpl_funce_common(card, buf, size);
104 printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u "
105 "type %u\n", mmc_hostname(card->host), size, buf[0]);
112 typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
113 const unsigned char *, unsigned);
117 unsigned char min_size;
121 static const struct cis_tpl cis_tpl_list[] = {
122 { 0x15, 3, /* cistpl_vers_1 */ },
123 { 0x20, 4, cistpl_manfid },
124 { 0x21, 2, /* cistpl_funcid */ },
125 { 0x22, 0, cistpl_funce },
128 static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
131 struct sdio_func_tuple *this, **prev;
135 * Note that this works for the common CIS (function number 0) as
136 * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
137 * have the same offset.
139 for (i = 0; i < 3; i++) {
147 ret = mmc_io_rw_direct(card, 0, 0,
148 SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
155 prev = &func->tuples;
157 prev = &card->tuples;
162 unsigned char tpl_code, tpl_link;
164 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
168 /* 0xff means we're done */
169 if (tpl_code == 0xff)
172 ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
176 this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
180 for (i = 0; i < tpl_link; i++) {
181 ret = mmc_io_rw_direct(card, 0, 0,
182 ptr + i, 0, &this->data[i]);
191 for (i = 0; i < ARRAY_SIZE(cis_tpl_list); i++)
192 if (cis_tpl_list[i].code == tpl_code)
194 if (i >= ARRAY_SIZE(cis_tpl_list)) {
195 /* this tuple is unknown to the core */
197 this->code = tpl_code;
198 this->size = tpl_link;
202 "%s: queuing CIS tuple 0x%02x length %u\n",
203 mmc_hostname(card->host), tpl_code, tpl_link);
205 const struct cis_tpl *tpl = cis_tpl_list + i;
206 if (tpl_link < tpl->min_size) {
208 "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n",
209 mmc_hostname(card->host),
210 tpl_code, tpl_link, tpl->min_size);
212 } else if (tpl->parse) {
213 ret = tpl->parse(card, func,
214 this->data, tpl_link);
223 * Link in all unknown tuples found in the common CIS so that
224 * drivers don't have to go digging in two places.
227 *prev = card->tuples;
232 int sdio_read_common_cis(struct mmc_card *card)
234 return sdio_read_cis(card, NULL);
237 void sdio_free_common_cis(struct mmc_card *card)
239 struct sdio_func_tuple *tuple, *victim;
241 tuple = card->tuples;
252 int sdio_read_func_cis(struct sdio_func *func)
256 ret = sdio_read_cis(func->card, func);
261 * Since we've linked to tuples in the card structure,
262 * we must make sure we have a reference to it.
264 get_device(&func->card->dev);
267 * Vendor/device id is optional for function CIS, so
268 * copy it from the card structure as needed.
270 if (func->vendor == 0) {
271 func->vendor = func->card->cis.vendor;
272 func->device = func->card->cis.device;
278 void sdio_free_func_cis(struct sdio_func *func)
280 struct sdio_func_tuple *tuple, *victim;
282 tuple = func->tuples;
284 while (tuple && tuple != func->card->tuples) {
293 * We have now removed the link to the tuples in the
294 * card structure, so remove the reference.
296 put_device(&func->card->dev);