From 1a632f8cdc33e7f8edca352164f0c96a75d08f08 Mon Sep 17 00:00:00 2001 From: Pierre Ossman Date: Mon, 30 Jul 2007 15:15:30 +0200 Subject: sdio: split up common and function CIS parsing Add a more clean separation between global, common CIS information and the function specific one as we need the common information in places where no specific function is specified. Signed-off-by: Pierre Ossman --- drivers/mmc/core/sdio_cis.c | 198 +++++++++++++++++++++++++++++++++++++++----- 1 file changed, 176 insertions(+), 22 deletions(-) (limited to 'drivers/mmc/core/sdio_cis.c') diff --git a/drivers/mmc/core/sdio_cis.c b/drivers/mmc/core/sdio_cis.c index b6c7342572c1..ec806a1229b6 100644 --- a/drivers/mmc/core/sdio_cis.c +++ b/drivers/mmc/core/sdio_cis.c @@ -16,60 +16,152 @@ #include #include +#include #include #include #include "sdio_cis.h" #include "sdio_ops.h" -static int cistpl_manfid(struct sdio_func *func, - const unsigned char *buf, - unsigned size) +static int cistpl_manfid(struct mmc_card *card, struct sdio_func *func, + const unsigned char *buf, unsigned size) { + unsigned int vendor, device; + /* TPLMID_MANF */ - func->vendor = buf[0] | (buf[1] << 8); + vendor = buf[0] | (buf[1] << 8); /* TPLMID_CARD */ - func->device = buf[2] | (buf[3] << 8); + 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 }; + +static int cistpl_funce_common(struct mmc_card *card, + const unsigned char *buf, unsigned size) +{ + if (size < 0x04 || buf[0] != 0) + 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 sdio_func *func, + const unsigned char *buf, unsigned size) +{ + unsigned vsn; + unsigned min_size; + + vsn = func->card->cccr.sdio_vsn; + min_size = (vsn == SDIO_SDIO_REV_1_00) ? 28 : 42; + + if (size < min_size || buf[0] != 1) + return -EINVAL; + + /* TPLFE_MAX_BLK_SIZE */ + func->blksize = buf[12] | (buf[13] << 8); return 0; } +static int cistpl_funce(struct mmc_card *card, struct sdio_func *func, + const unsigned char *buf, unsigned size) +{ + int ret; + + /* + * There should be two versions of the CISTPL_FUNCE tuple, + * one for the common CIS (function 0) and a version used by + * the individual function's CIS (1-7). Yet, the later has a + * different length depending on the SDIO spec version. + */ + if (func) + ret = cistpl_funce_func(func, buf, size); + else + ret = cistpl_funce_common(card, buf, size); + + if (ret) { + printk(KERN_ERR "%s: bad CISTPL_FUNCE size %u " + "type %u\n", mmc_hostname(card->host), size, buf[0]); + return ret; + } + + return 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; - int (*parse)(struct sdio_func *, const unsigned char *buf, unsigned size); + tpl_parse_t *parse; }; 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 */ }, + { 0x22, 0, cistpl_funce }, }; -int sdio_read_cis(struct sdio_func *func) +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; - ret = mmc_io_rw_direct(func->card, 0, 0, - func->num * 0x100 + SDIO_FBR_CIS + i, 0, &x); + unsigned char x, fn; + + if (func) + fn = func->num; + else + fn = 0; + + ret = mmc_io_rw_direct(card, 0, 0, + fn * 0x100 + SDIO_FBR_CIS + i, 0, &x); if (ret) return ret; ptr |= x << (i * 8); } - /* find the list tail */ - for (prev = &func->tuples; *prev; prev = &(*prev)->next); + if (func) + prev = &func->tuples; + else + prev = &card->tuples; + + BUG_ON(*prev); do { unsigned char tpl_code, tpl_link; - ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_code); + ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_code); if (ret) break; @@ -77,7 +169,7 @@ int sdio_read_cis(struct sdio_func *func) if (tpl_code == 0xff) break; - ret = mmc_io_rw_direct(func->card, 0, 0, ptr++, 0, &tpl_link); + ret = mmc_io_rw_direct(card, 0, 0, ptr++, 0, &tpl_link); if (ret) break; @@ -86,7 +178,7 @@ int sdio_read_cis(struct sdio_func *func) return -ENOMEM; for (i = 0; i < tpl_link; i++) { - ret = mmc_io_rw_direct(func->card, 0, 0, + ret = mmc_io_rw_direct(card, 0, 0, ptr + i, 0, &this->data[i]); if (ret) break; @@ -108,30 +200,45 @@ int sdio_read_cis(struct sdio_func *func) prev = &this->next; printk(KERN_DEBUG "%s: queuing CIS tuple 0x%02x length %u\n", - sdio_func_id(func), tpl_code, tpl_link); + mmc_hostname(card->host), tpl_code, tpl_link); } else { const struct cis_tpl *tpl = cis_tpl_list + i; if (tpl_link < tpl->min_size) { printk(KERN_ERR "%s: bad CIS tuple 0x%02x (length = %u, expected >= %u)\n", - sdio_func_id(func), tpl_code, tpl_link, tpl->min_size); + mmc_hostname(card->host), + tpl_code, tpl_link, tpl->min_size); ret = -EINVAL; - } else if (tpl->parse) - ret = tpl->parse(func, this->data, tpl_link); + } else if (tpl->parse) { + ret = tpl->parse(card, func, + this->data, tpl_link); + } 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; } -void sdio_free_cis(struct sdio_func *func) +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 = func->tuples; + tuple = card->tuples; while (tuple) { victim = tuple; @@ -139,6 +246,53 @@ void sdio_free_cis(struct sdio_func *func) 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); } -- cgit v1.2.3