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Diffstat (limited to 'drivers/mmc/core/sdio_cis.c')
-rw-r--r--drivers/mmc/core/sdio_cis.c428
1 files changed, 428 insertions, 0 deletions
diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c
new file mode 100644
index 000000000..dca72444b
--- /dev/null
+++ b/drivers/mmc/core/sdio_cis.c
@@ -0,0 +1,428 @@
+/*
+ * linux/drivers/mmc/core/sdio_cis.c
+ *
+ * Author: Nicolas Pitre
+ * Created: June 11, 2007
+ * Copyright: MontaVista Software Inc.
+ *
+ * Copyright 2007 Pierre Ossman
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+
+#include <linux/mmc/host.h>
+#include <linux/mmc/card.h>
+#include <linux/mmc/sdio.h>
+#include <linux/mmc/sdio_func.h>
+
+#include "sdio_cis.h"
+#include "sdio_ops.h"
+
+#define SDIO_READ_CIS_TIMEOUT_MS (10 * 1000) /* 10s */
+
+static int cistpl_vers_1(struct mmc_card *card, struct sdio_func *func,
+ const unsigned char *buf, unsigned size)
+{
+ unsigned i, nr_strings;
+ char **buffer, *string;
+
+ if (size < 2)
+ return 0;
+
+ /* Find all null-terminated (including zero length) strings in
+ the TPLLV1_INFO field. Trailing garbage is ignored. */
+ buf += 2;
+ size -= 2;
+
+ nr_strings = 0;
+ for (i = 0; i < size; i++) {
+ if (buf[i] == 0xff)
+ break;
+ if (buf[i] == 0)
+ nr_strings++;
+ }
+ if (nr_strings == 0)
+ return 0;
+
+ size = i;
+
+ buffer = kzalloc(sizeof(char*) * nr_strings + size, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ string = (char*)(buffer + nr_strings);
+
+ for (i = 0; i < nr_strings; i++) {
+ buffer[i] = string;
+ strcpy(string, buf);
+ string += strlen(string) + 1;
+ buf += strlen(buf) + 1;
+ }
+
+ if (func) {
+ func->num_info = nr_strings;
+ func->info = (const char**)buffer;
+ } else {
+ card->num_info = nr_strings;
+ card->info = (const char**)buffer;
+ }
+
+ return 0;
+}
+
+static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func,
+ const unsigned char *buf, unsigned size)
+{
+ unsigned int vendor, device;
+
+ /* TPLMID_MANF */
+ vendor = buf[0] | (buf[1] << 8);
+
+ /* TPLMID_CARD */
+ device = buf[2] | (buf[3] << 8);
+
+ if (func) {
+ func->vendor = vendor;
+ func->device = device;
+ } else {
+ card->cis.vendor = vendor;
+ card->cis.device = device;
+ }
+
+ return 0;
+}
+
+static const unsigned char speed_val[16] =
+ { 0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80 };
+static const unsigned int speed_unit[8] =
+ { 10000, 100000, 1000000, 10000000, 0, 0, 0, 0 };
+
+
+typedef int (tpl_parse_t)(struct mmc_card *, struct sdio_func *,
+ const unsigned char *, unsigned);
+
+struct cis_tpl {
+ unsigned char code;
+ unsigned char min_size;
+ tpl_parse_t *parse;
+};
+
+static int cis_tpl_parse(struct mmc_card *card, struct sdio_func *func,
+ const char *tpl_descr,
+ const struct cis_tpl *tpl, int tpl_count,
+ unsigned char code,
+ const unsigned char *buf, unsigned size)
+{
+ int i, ret;
+
+ /* look for a matching code in the table */
+ for (i = 0; i < tpl_count; i++, tpl++) {
+ if (tpl->code == code)
+ break;
+ }
+ if (i < tpl_count) {
+ if (size >= tpl->min_size) {
+ if (tpl->parse)
+ ret = tpl->parse(card, func, buf, size);
+ else
+ ret = -EILSEQ; /* known tuple, not parsed */
+ } else {
+ /* invalid tuple */
+ ret = -EINVAL;
+ }
+ if (ret && ret != -EILSEQ && ret != -ENOENT) {
+ pr_err("%s: bad %s tuple 0x%02x (%u bytes)\n",
+ mmc_hostname(card->host), tpl_descr, code, size);
+ }
+ } else {
+ /* unknown tuple */
+ ret = -ENOENT;
+ }
+
+ return ret;
+}
+
+static int cistpl_funce_common(struct mmc_card *card, struct sdio_func *func,
+ const unsigned char *buf, unsigned size)
+{
+ /* Only valid for the common CIS (function 0) */
+ if (func)
+ return -EINVAL;
+
+ /* TPLFE_FN0_BLK_SIZE */
+ card->cis.blksize = buf[1] | (buf[2] << 8);
+
+ /* TPLFE_MAX_TRAN_SPEED */
+ card->cis.max_dtr = speed_val[(buf[3] >> 3) & 15] *
+ speed_unit[buf[3] & 7];
+
+ return 0;
+}
+
+static int cistpl_funce_func(struct mmc_card *card, struct sdio_func *func,
+ const unsigned char *buf, unsigned size)
+{
+ unsigned vsn;
+ unsigned min_size;
+
+ /* Only valid for the individual function's CIS (1-7) */
+ if (!func)
+ return -EINVAL;
+
+ /*
+ * This tuple has a different length depending on the SDIO spec
+ * version.
+ */
+ vsn = func->card->cccr.sdio_vsn;
+ min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42;
+
+ if (size == 28 && vsn == SDIO_SDIO_REV_1_10) {
+ pr_warn("%s: card has broken SDIO 1.1 CIS, forcing SDIO 1.0\n",
+ mmc_hostname(card->host));
+ vsn = SDIO_SDIO_REV_1_00;
+ } else if (size < min_size) {
+ return -EINVAL;
+ }
+
+ /* TPLFE_MAX_BLK_SIZE */
+ func->max_blksize = buf[12] | (buf[13] << 8);
+
+ /* TPLFE_ENABLE_TIMEOUT_VAL, present in ver 1.1 and above */
+ if (vsn > SDIO_SDIO_REV_1_00)
+ func->enable_timeout = (buf[28] | (buf[29] << 8)) * 10;
+ else
+ func->enable_timeout = jiffies_to_msecs(HZ);
+
+ return 0;
+}
+
+/*
+ * Known TPLFE_TYPEs table for CISTPL_FUNCE tuples.
+ *
+ * Note that, unlike PCMCIA, CISTPL_FUNCE tuples are not parsed depending
+ * on the TPLFID_FUNCTION value of the previous CISTPL_FUNCID as on SDIO
+ * TPLFID_FUNCTION is always hardcoded to 0x0C.
+ */
+static const struct cis_tpl cis_tpl_funce_list[] = {
+ { 0x00, 4, cistpl_funce_common },
+ { 0x01, 0, cistpl_funce_func },
+ { 0x04, 1+1+6, /* CISTPL_FUNCE_LAN_NODE_ID */ },
+};
+
+static int cistpl_funce(struct mmc_card *card, struct sdio_func *func,
+ const unsigned char *buf, unsigned size)
+{
+ if (size < 1)
+ return -EINVAL;
+
+ return cis_tpl_parse(card, func, "CISTPL_FUNCE",
+ cis_tpl_funce_list,
+ ARRAY_SIZE(cis_tpl_funce_list),
+ buf[0], buf, size);
+}
+
+/* Known TPL_CODEs table for CIS tuples */
+static const struct cis_tpl cis_tpl_list[] = {
+ { 0x15, 3, cistpl_vers_1 },
+ { 0x20, 4, cistpl_manfid },
+ { 0x21, 2, /* cistpl_funcid */ },
+ { 0x22, 0, cistpl_funce },
+ { 0x91, 2, /* cistpl_sdio_std */ },
+};
+
+static int sdio_read_cis(struct mmc_card *card, struct sdio_func *func)
+{
+ int ret;
+ struct sdio_func_tuple *this, **prev;
+ unsigned i, ptr = 0;
+
+ /*
+ * Note that this works for the common CIS (function number 0) as
+ * well as a function's CIS * since SDIO_CCCR_CIS and SDIO_FBR_CIS
+ * have the same offset.
+ */
+ for (i = 0; i < 3; i++) {
+ unsigned char x, fn;
+
+ if (func)
+ fn = func->num;
+ else
+ fn = 0;
+
+ ret = mmc_io_rw_direct(card, 0, 0,
+ SDIO_FBR_BASE(fn) + SDIO_FBR_CIS + i, 0, &x);
+ if (ret)
+ return ret;
+ ptr |= x << (i * 8);
+ }
+
+ if (func)
+ prev = &func->tuples;
+ else
+ prev = &card->tuples;
+
+ if (*prev)
+ return -EINVAL;
+
+ do {
+ unsigned char tpl_code, tpl_link;
+ unsigned long timeout = jiffies +
+ msecs_to_jiffies(SDIO_READ_CIS_TIMEOUT_MS);
+
+ ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code);
+ if (ret)
+ break;
+
+ /* 0xff means we're done */
+ if (tpl_code == 0xff)
+ break;
+
+ /* null entries have no link field or data */
+ if (tpl_code == 0x00)
+ continue;
+
+ ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link);
+ if (ret)
+ break;
+
+ /* a size of 0xff also means we're done */
+ if (tpl_link == 0xff)
+ break;
+
+ this = kmalloc(sizeof(*this) + tpl_link, GFP_KERNEL);
+ if (!this)
+ return -ENOMEM;
+
+ for (i = 0; i < tpl_link; i++) {
+ ret = mmc_io_rw_direct(card, 0, 0,
+ ptr + i, 0, &this->data[i]);
+ if (ret)
+ break;
+ }
+ if (ret) {
+ kfree(this);
+ break;
+ }
+
+ /* Try to parse the CIS tuple */
+ ret = cis_tpl_parse(card, func, "CIS",
+ cis_tpl_list, ARRAY_SIZE(cis_tpl_list),
+ tpl_code, this->data, tpl_link);
+ if (ret == -EILSEQ || ret == -ENOENT) {
+ /*
+ * The tuple is unknown or known but not parsed.
+ * Queue the tuple for the function driver.
+ */
+ this->next = NULL;
+ this->code = tpl_code;
+ this->size = tpl_link;
+ *prev = this;
+ prev = &this->next;
+
+ if (ret == -ENOENT) {
+ if (time_after(jiffies, timeout))
+ break;
+ /* warn about unknown tuples */
+ pr_warn_ratelimited("%s: queuing unknown"
+ " CIS tuple 0x%02x (%u bytes)\n",
+ mmc_hostname(card->host),
+ tpl_code, tpl_link);
+ }
+
+ /* keep on analyzing tuples */
+ ret = 0;
+ } else {
+ /*
+ * We don't need the tuple anymore if it was
+ * successfully parsed by the SDIO core or if it is
+ * not going to be queued for a driver.
+ */
+ kfree(this);
+ }
+
+ ptr += tpl_link;
+ } while (!ret);
+
+ /*
+ * Link in all unknown tuples found in the common CIS so that
+ * drivers don't have to go digging in two places.
+ */
+ if (func)
+ *prev = card->tuples;
+
+ return ret;
+}
+
+int sdio_read_common_cis(struct mmc_card *card)
+{
+ return sdio_read_cis(card, NULL);
+}
+
+void sdio_free_common_cis(struct mmc_card *card)
+{
+ struct sdio_func_tuple *tuple, *victim;
+
+ tuple = card->tuples;
+
+ while (tuple) {
+ victim = tuple;
+ tuple = tuple->next;
+ kfree(victim);
+ }
+
+ card->tuples = NULL;
+}
+
+int sdio_read_func_cis(struct sdio_func *func)
+{
+ int ret;
+
+ ret = sdio_read_cis(func->card, func);
+ if (ret)
+ return ret;
+
+ /*
+ * Since we've linked to tuples in the card structure,
+ * we must make sure we have a reference to it.
+ */
+ get_device(&func->card->dev);
+
+ /*
+ * Vendor/device id is optional for function CIS, so
+ * copy it from the card structure as needed.
+ */
+ if (func->vendor == 0) {
+ func->vendor = func->card->cis.vendor;
+ func->device = func->card->cis.device;
+ }
+
+ return 0;
+}
+
+void sdio_free_func_cis(struct sdio_func *func)
+{
+ struct sdio_func_tuple *tuple, *victim;
+
+ tuple = func->tuples;
+
+ while (tuple && tuple != func->card->tuples) {
+ victim = tuple;
+ tuple = tuple->next;
+ kfree(victim);
+ }
+
+ func->tuples = NULL;
+
+ /*
+ * We have now removed the link to the tuples in the
+ * card structure, so remove the reference.
+ */
+ put_device(&func->card->dev);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 16:26:32 +0000