/drivers/mmc/core/sdio.c
https://bitbucket.org/ndreys/linux-sunxi · C · 1000 lines · 626 code · 176 blank · 198 comment · 179 complexity · 5aae0dca7fbb4f5dbcab6dab387d473d MD5 · raw file
- /*
- * linux/drivers/mmc/sdio.c
- *
- * Copyright 2006-2007 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/err.h>
- #include <linux/pm_runtime.h>
- #include <linux/mmc/host.h>
- #include <linux/mmc/card.h>
- #include <linux/mmc/sdio.h>
- #include <linux/mmc/sdio_func.h>
- #include <linux/mmc/sdio_ids.h>
- #include "core.h"
- #include "bus.h"
- #include "sd.h"
- #include "sdio_bus.h"
- #include "mmc_ops.h"
- #include "sd_ops.h"
- #include "sdio_ops.h"
- #include "sdio_cis.h"
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- #include <linux/mmc/sdio_ids.h>
- #endif
- static int sdio_read_fbr(struct sdio_func *func)
- {
- int ret;
- unsigned char data;
- if (mmc_card_nonstd_func_interface(func->card)) {
- func->class = SDIO_CLASS_NONE;
- return 0;
- }
- ret = mmc_io_rw_direct(func->card, 0, 0,
- SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
- if (ret)
- goto out;
- data &= 0x0f;
- if (data == 0x0f) {
- ret = mmc_io_rw_direct(func->card, 0, 0,
- SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
- if (ret)
- goto out;
- }
- func->class = data;
- out:
- return ret;
- }
- static int sdio_init_func(struct mmc_card *card, unsigned int fn)
- {
- int ret;
- struct sdio_func *func;
- BUG_ON(fn > SDIO_MAX_FUNCS);
- func = sdio_alloc_func(card);
- if (IS_ERR(func))
- return PTR_ERR(func);
- func->num = fn;
- if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
- ret = sdio_read_fbr(func);
- if (ret)
- goto fail;
- ret = sdio_read_func_cis(func);
- if (ret)
- goto fail;
- } else {
- func->vendor = func->card->cis.vendor;
- func->device = func->card->cis.device;
- func->max_blksize = func->card->cis.blksize;
- }
- card->sdio_func[fn - 1] = func;
- return 0;
- fail:
- /*
- * It is okay to remove the function here even though we hold
- * the host lock as we haven't registered the device yet.
- */
- sdio_remove_func(func);
- return ret;
- }
- static int sdio_read_cccr(struct mmc_card *card)
- {
- int ret;
- int cccr_vsn;
- unsigned char data;
- memset(&card->cccr, 0, sizeof(struct sdio_cccr));
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
- if (ret)
- goto out;
- cccr_vsn = data & 0x0f;
- if (cccr_vsn > SDIO_CCCR_REV_1_20) {
- printk(KERN_ERR "%s: unrecognised CCCR structure version %d\n",
- mmc_hostname(card->host), cccr_vsn);
- return -EINVAL;
- }
- card->cccr.sdio_vsn = (data & 0xf0) >> 4;
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
- if (ret)
- goto out;
- if (data & SDIO_CCCR_CAP_SMB)
- card->cccr.multi_block = 1;
- if (data & SDIO_CCCR_CAP_LSC)
- card->cccr.low_speed = 1;
- if (data & SDIO_CCCR_CAP_4BLS)
- card->cccr.wide_bus = 1;
- if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
- if (ret)
- goto out;
- if (data & SDIO_POWER_SMPC)
- card->cccr.high_power = 1;
- }
- if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &data);
- if (ret)
- goto out;
- if (data & SDIO_SPEED_SHS)
- card->cccr.high_speed = 1;
- }
- out:
- return ret;
- }
- static int sdio_enable_wide(struct mmc_card *card)
- {
- int ret;
- u8 ctrl;
- if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
- return 0;
- if (card->cccr.low_speed && !card->cccr.wide_bus)
- return 0;
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
- if (ret)
- return ret;
- ctrl |= SDIO_BUS_WIDTH_4BIT;
- ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
- if (ret)
- return ret;
- return 1;
- }
- /*
- * If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
- * of the card. This may be required on certain setups of boards,
- * controllers and embedded sdio device which do not need the card's
- * pull-up. As a result, card detection is disabled and power is saved.
- */
- static int sdio_disable_cd(struct mmc_card *card)
- {
- int ret;
- u8 ctrl;
- if (!mmc_card_disable_cd(card))
- return 0;
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
- if (ret)
- return ret;
- ctrl |= SDIO_BUS_CD_DISABLE;
- return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
- }
- /*
- * Devices that remain active during a system suspend are
- * put back into 1-bit mode.
- */
- static int sdio_disable_wide(struct mmc_card *card)
- {
- int ret;
- u8 ctrl;
- if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
- return 0;
- if (card->cccr.low_speed && !card->cccr.wide_bus)
- return 0;
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
- if (ret)
- return ret;
- if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
- return 0;
- ctrl &= ~SDIO_BUS_WIDTH_4BIT;
- ctrl |= SDIO_BUS_ASYNC_INT;
- ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
- if (ret)
- return ret;
- mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
- return 0;
- }
- static int sdio_enable_4bit_bus(struct mmc_card *card)
- {
- int err;
- if (card->type == MMC_TYPE_SDIO)
- return sdio_enable_wide(card);
- if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
- (card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
- err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
- if (err)
- return err;
- } else
- return 0;
- err = sdio_enable_wide(card);
- if (err <= 0)
- mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
- return err;
- }
- /*
- * Test if the card supports high-speed mode and, if so, switch to it.
- */
- static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
- {
- int ret;
- u8 speed;
- if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
- return 0;
- if (!card->cccr.high_speed)
- return 0;
- ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
- if (ret)
- return ret;
- if (enable)
- speed |= SDIO_SPEED_EHS;
- else
- speed &= ~SDIO_SPEED_EHS;
- ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
- if (ret)
- return ret;
- return 1;
- }
- /*
- * Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
- */
- static int sdio_enable_hs(struct mmc_card *card)
- {
- int ret;
- ret = mmc_sdio_switch_hs(card, true);
- if (ret <= 0 || card->type == MMC_TYPE_SDIO)
- return ret;
- ret = mmc_sd_switch_hs(card);
- if (ret <= 0)
- mmc_sdio_switch_hs(card, false);
- return ret;
- }
- static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
- {
- unsigned max_dtr;
- if (mmc_card_highspeed(card)) {
- /*
- * The SDIO specification doesn't mention how
- * the CIS transfer speed register relates to
- * high-speed, but it seems that 50 MHz is
- * mandatory.
- */
- max_dtr = 50000000;
- } else {
- max_dtr = card->cis.max_dtr;
- }
- if (card->type == MMC_TYPE_SD_COMBO)
- max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
- return max_dtr;
- }
- /*
- * Handle the detection and initialisation of a card.
- *
- * In the case of a resume, "oldcard" will contain the card
- * we're trying to reinitialise.
- */
- static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
- struct mmc_card *oldcard, int powered_resume)
- {
- struct mmc_card *card;
- int err;
- BUG_ON(!host);
- WARN_ON(!host->claimed);
- /*
- * Inform the card of the voltage
- */
- if (!powered_resume) {
- err = mmc_send_io_op_cond(host, host->ocr, &ocr);
- if (err)
- goto err;
- }
- /*
- * For SPI, enable CRC as appropriate.
- */
- if (mmc_host_is_spi(host)) {
- err = mmc_spi_set_crc(host, use_spi_crc);
- if (err)
- goto err;
- }
- /*
- * Allocate card structure.
- */
- card = mmc_alloc_card(host, NULL);
- if (IS_ERR(card)) {
- err = PTR_ERR(card);
- goto err;
- }
- if ((ocr & R4_MEMORY_PRESENT) &&
- mmc_sd_get_cid(host, host->ocr & ocr, card->raw_cid, NULL) == 0) {
- card->type = MMC_TYPE_SD_COMBO;
- if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
- memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
- mmc_remove_card(card);
- return -ENOENT;
- }
- } else {
- card->type = MMC_TYPE_SDIO;
- if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
- mmc_remove_card(card);
- return -ENOENT;
- }
- }
- /*
- * Call the optional HC's init_card function to handle quirks.
- */
- if (host->ops->init_card)
- host->ops->init_card(host, card);
- /*
- * For native busses: set card RCA and quit open drain mode.
- */
- if (!powered_resume && !mmc_host_is_spi(host)) {
- err = mmc_send_relative_addr(host, &card->rca);
- if (err)
- goto remove;
- /*
- * Update oldcard with the new RCA received from the SDIO
- * device -- we're doing this so that it's updated in the
- * "card" struct when oldcard overwrites that later.
- */
- if (oldcard)
- oldcard->rca = card->rca;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
- }
- /*
- * Read CSD, before selecting the card
- */
- if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
- err = mmc_sd_get_csd(host, card);
- if (err)
- return err;
- mmc_decode_cid(card);
- }
- /*
- * Select card, as all following commands rely on that.
- */
- if (!powered_resume && !mmc_host_is_spi(host)) {
- err = mmc_select_card(card);
- if (err)
- goto remove;
- }
- if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
- /*
- * This is non-standard SDIO device, meaning it doesn't
- * have any CIA (Common I/O area) registers present.
- * It's host's responsibility to fill cccr and cis
- * structures in init_card().
- */
- mmc_set_clock(host, card->cis.max_dtr);
- if (card->cccr.high_speed) {
- mmc_card_set_highspeed(card);
- mmc_set_timing(card->host, MMC_TIMING_SD_HS);
- }
- goto finish;
- }
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- if (host->embedded_sdio_data.cccr)
- memcpy(&card->cccr, host->embedded_sdio_data.cccr, sizeof(struct sdio_cccr));
- else {
- #endif
- /*
- * Read the common registers.
- */
- err = sdio_read_cccr(card);
- if (err)
- goto remove;
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- }
- #endif
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- if (host->embedded_sdio_data.cis)
- memcpy(&card->cis, host->embedded_sdio_data.cis, sizeof(struct sdio_cis));
- else {
- #endif
- /*
- * Read the common CIS tuples.
- */
- err = sdio_read_common_cis(card);
- if (err)
- goto remove;
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- }
- #endif
- if (oldcard) {
- int same = (card->cis.vendor == oldcard->cis.vendor &&
- card->cis.device == oldcard->cis.device);
- mmc_remove_card(card);
- if (!same)
- return -ENOENT;
- card = oldcard;
- }
- mmc_fixup_device(card, NULL);
- if (card->type == MMC_TYPE_SD_COMBO) {
- err = mmc_sd_setup_card(host, card, oldcard != NULL);
- /* handle as SDIO-only card if memory init failed */
- if (err) {
- mmc_go_idle(host);
- if (mmc_host_is_spi(host))
- /* should not fail, as it worked previously */
- mmc_spi_set_crc(host, use_spi_crc);
- card->type = MMC_TYPE_SDIO;
- } else
- card->dev.type = &sd_type;
- }
- /*
- * If needed, disconnect card detection pull-up resistor.
- */
- err = sdio_disable_cd(card);
- if (err)
- goto remove;
- /*
- * Switch to high-speed (if supported).
- */
- err = sdio_enable_hs(card);
- if (err > 0)
- mmc_sd_go_highspeed(card);
- else if (err)
- goto remove;
- /*
- * Change to the card's maximum speed.
- */
- mmc_set_clock(host, mmc_sdio_get_max_clock(card));
- /*
- * Switch to wider bus (if supported).
- */
- err = sdio_enable_4bit_bus(card);
- if (err > 0)
- mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
- else if (err)
- goto remove;
- finish:
- if (!oldcard)
- host->card = card;
- return 0;
- remove:
- if (!oldcard)
- mmc_remove_card(card);
- err:
- return err;
- }
- /*
- * Host is being removed. Free up the current card.
- */
- static void mmc_sdio_remove(struct mmc_host *host)
- {
- int i;
- BUG_ON(!host);
- BUG_ON(!host->card);
- for (i = 0;i < host->card->sdio_funcs;i++) {
- if (host->card->sdio_func[i]) {
- sdio_remove_func(host->card->sdio_func[i]);
- host->card->sdio_func[i] = NULL;
- }
- }
- mmc_remove_card(host->card);
- host->card = NULL;
- }
- /*
- * Card detection callback from host.
- */
- static void mmc_sdio_detect(struct mmc_host *host)
- {
- int err;
- BUG_ON(!host);
- BUG_ON(!host->card);
- /* Make sure card is powered before detecting it */
- if (host->caps & MMC_CAP_POWER_OFF_CARD) {
- err = pm_runtime_get_sync(&host->card->dev);
- if (err < 0)
- goto out;
- }
- mmc_claim_host(host);
- /*
- * Just check if our card has been removed.
- */
- err = mmc_select_card(host->card);
- mmc_release_host(host);
- /*
- * Tell PM core it's OK to power off the card now.
- *
- * The _sync variant is used in order to ensure that the card
- * is left powered off in case an error occurred, and the card
- * is going to be removed.
- *
- * Since there is no specific reason to believe a new user
- * is about to show up at this point, the _sync variant is
- * desirable anyway.
- */
- if (host->caps & MMC_CAP_POWER_OFF_CARD)
- pm_runtime_put_sync(&host->card->dev);
- out:
- if (err) {
- mmc_sdio_remove(host);
- mmc_claim_host(host);
- mmc_detach_bus(host);
- mmc_power_off(host);
- mmc_release_host(host);
- }
- }
- /*
- * SDIO suspend. We need to suspend all functions separately.
- * Therefore all registered functions must have drivers with suspend
- * and resume methods. Failing that we simply remove the whole card.
- */
- static int mmc_sdio_suspend(struct mmc_host *host)
- {
- int i, err = 0;
- for (i = 0; i < host->card->sdio_funcs; i++) {
- struct sdio_func *func = host->card->sdio_func[i];
- if (func && sdio_func_present(func) && func->dev.driver) {
- const struct dev_pm_ops *pmops = func->dev.driver->pm;
- if (!pmops || !pmops->suspend || !pmops->resume) {
- /* force removal of entire card in that case */
- err = -ENOSYS;
- } else
- err = pmops->suspend(&func->dev);
- if (err)
- break;
- }
- }
- while (err && --i >= 0) {
- struct sdio_func *func = host->card->sdio_func[i];
- if (func && sdio_func_present(func) && func->dev.driver) {
- const struct dev_pm_ops *pmops = func->dev.driver->pm;
- pmops->resume(&func->dev);
- }
- }
- if (!err && mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
- mmc_claim_host(host);
- sdio_disable_wide(host->card);
- mmc_release_host(host);
- }
- return err;
- }
- static int mmc_sdio_resume(struct mmc_host *host)
- {
- int i, err = 0;
- BUG_ON(!host);
- BUG_ON(!host->card);
- /* Basic card reinitialization. */
- mmc_claim_host(host);
- /* No need to reinitialize powered-resumed nonremovable cards */
- if (mmc_card_is_removable(host) || !mmc_card_keep_power(host))
- err = mmc_sdio_init_card(host, host->ocr, host->card,
- mmc_card_keep_power(host));
- else if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host)) {
- /* We may have switched to 1-bit mode during suspend */
- err = sdio_enable_4bit_bus(host->card);
- if (err > 0) {
- mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
- err = 0;
- }
- }
- if (!err && host->sdio_irqs)
- wake_up_process(host->sdio_irq_thread);
- mmc_release_host(host);
- /*
- * If the card looked to be the same as before suspending, then
- * we proceed to resume all card functions. If one of them returns
- * an error then we simply return that error to the core and the
- * card will be redetected as new. It is the responsibility of
- * the function driver to perform further tests with the extra
- * knowledge it has of the card to confirm the card is indeed the
- * same as before suspending (same MAC address for network cards,
- * etc.) and return an error otherwise.
- */
- for (i = 0; !err && i < host->card->sdio_funcs; i++) {
- struct sdio_func *func = host->card->sdio_func[i];
- if (func && sdio_func_present(func) && func->dev.driver) {
- const struct dev_pm_ops *pmops = func->dev.driver->pm;
- err = pmops->resume(&func->dev);
- }
- }
- return err;
- }
- static int mmc_sdio_power_restore(struct mmc_host *host)
- {
- int ret;
- u32 ocr;
- BUG_ON(!host);
- BUG_ON(!host->card);
- mmc_claim_host(host);
- /*
- * Reset the card by performing the same steps that are taken by
- * mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe.
- *
- * sdio_reset() is technically not needed. Having just powered up the
- * hardware, it should already be in reset state. However, some
- * platforms (such as SD8686 on OLPC) do not instantly cut power,
- * meaning that a reset is required when restoring power soon after
- * powering off. It is harmless in other cases.
- *
- * The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec,
- * is not necessary for non-removable cards. However, it is required
- * for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and
- * harmless in other situations.
- *
- * With these steps taken, mmc_select_voltage() is also required to
- * restore the correct voltage setting of the card.
- */
- sdio_reset(host);
- mmc_go_idle(host);
- mmc_send_if_cond(host, host->ocr_avail);
- ret = mmc_send_io_op_cond(host, 0, &ocr);
- if (ret)
- goto out;
- if (host->ocr_avail_sdio)
- host->ocr_avail = host->ocr_avail_sdio;
- host->ocr = mmc_select_voltage(host, ocr & ~0x7F);
- if (!host->ocr) {
- ret = -EINVAL;
- goto out;
- }
- ret = mmc_sdio_init_card(host, host->ocr, host->card,
- mmc_card_keep_power(host));
- if (!ret && host->sdio_irqs)
- mmc_signal_sdio_irq(host);
- out:
- mmc_release_host(host);
- return ret;
- }
- static const struct mmc_bus_ops mmc_sdio_ops = {
- .remove = mmc_sdio_remove,
- .detect = mmc_sdio_detect,
- .suspend = mmc_sdio_suspend,
- .resume = mmc_sdio_resume,
- .power_restore = mmc_sdio_power_restore,
- };
- /*
- * Starting point for SDIO card init.
- */
- int mmc_attach_sdio(struct mmc_host *host)
- {
- int err, i, funcs;
- u32 ocr;
- struct mmc_card *card;
- BUG_ON(!host);
- WARN_ON(!host->claimed);
- err = mmc_send_io_op_cond(host, 0, &ocr);
- if (err)
- return err;
- mmc_attach_bus(host, &mmc_sdio_ops);
- if (host->ocr_avail_sdio)
- host->ocr_avail = host->ocr_avail_sdio;
- /*
- * Sanity check the voltages that the card claims to
- * support.
- */
- if (ocr & 0x7F) {
- printk(KERN_WARNING "%s: card claims to support voltages "
- "below the defined range. These will be ignored.\n",
- mmc_hostname(host));
- ocr &= ~0x7F;
- }
- host->ocr = mmc_select_voltage(host, ocr);
- /*
- * Can we support the voltage(s) of the card(s)?
- */
- if (!host->ocr) {
- err = -EINVAL;
- goto err;
- }
- /*
- * Detect and init the card.
- */
- err = mmc_sdio_init_card(host, host->ocr, NULL, 0);
- if (err)
- goto err;
- card = host->card;
- /*
- * Enable runtime PM only if supported by host+card+board
- */
- if (host->caps & MMC_CAP_POWER_OFF_CARD) {
- /*
- * Let runtime PM core know our card is active
- */
- err = pm_runtime_set_active(&card->dev);
- if (err)
- goto remove;
- /*
- * Enable runtime PM for this card
- */
- pm_runtime_enable(&card->dev);
- }
- /*
- * The number of functions on the card is encoded inside
- * the ocr.
- */
- funcs = (ocr & 0x70000000) >> 28;
- card->sdio_funcs = 0;
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- if (host->embedded_sdio_data.funcs)
- card->sdio_funcs = funcs = host->embedded_sdio_data.num_funcs;
- #endif
- /*
- * Initialize (but don't add) all present functions.
- */
- for (i = 0; i < funcs; i++, card->sdio_funcs++) {
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- if (host->embedded_sdio_data.funcs) {
- struct sdio_func *tmp;
- tmp = sdio_alloc_func(host->card);
- if (IS_ERR(tmp))
- goto remove;
- tmp->num = (i + 1);
- card->sdio_func[i] = tmp;
- tmp->class = host->embedded_sdio_data.funcs[i].f_class;
- tmp->max_blksize = host->embedded_sdio_data.funcs[i].f_maxblksize;
- tmp->vendor = card->cis.vendor;
- tmp->device = card->cis.device;
- } else {
- #endif
- err = sdio_init_func(host->card, i + 1);
- if (err)
- goto remove;
- #ifdef CONFIG_MMC_EMBEDDED_SDIO
- }
- #endif
- /*
- * Enable Runtime PM for this func (if supported)
- */
- if (host->caps & MMC_CAP_POWER_OFF_CARD)
- pm_runtime_enable(&card->sdio_func[i]->dev);
- }
- /*
- * First add the card to the driver model...
- */
- mmc_release_host(host);
- err = mmc_add_card(host->card);
- if (err)
- goto remove_added;
- /*
- * ...then the SDIO functions.
- */
- for (i = 0;i < funcs;i++) {
- err = sdio_add_func(host->card->sdio_func[i]);
- if (err)
- goto remove_added;
- }
- mmc_claim_host(host);
- return 0;
- remove_added:
- /* Remove without lock if the device has been added. */
- mmc_sdio_remove(host);
- mmc_claim_host(host);
- remove:
- /* And with lock if it hasn't been added. */
- mmc_release_host(host);
- if (host->card)
- mmc_sdio_remove(host);
- mmc_claim_host(host);
- err:
- mmc_detach_bus(host);
- printk(KERN_ERR "%s: error %d whilst initialising SDIO card\n",
- mmc_hostname(host), err);
- return err;
- }
- int sdio_reset_comm(struct mmc_card *card)
- {
- struct mmc_host *host = card->host;
- u32 ocr;
- int err;
- printk("%s():\n", __func__);
- mmc_claim_host(host);
- mmc_go_idle(host);
- mmc_set_clock(host, host->f_min);
- err = mmc_send_io_op_cond(host, 0, &ocr);
- if (err)
- goto err;
- host->ocr = mmc_select_voltage(host, ocr);
- if (!host->ocr) {
- err = -EINVAL;
- goto err;
- }
- err = mmc_send_io_op_cond(host, host->ocr, &ocr);
- if (err)
- goto err;
- if (mmc_host_is_spi(host)) {
- err = mmc_spi_set_crc(host, use_spi_crc);
- if (err)
- goto err;
- }
- if (!mmc_host_is_spi(host)) {
- err = mmc_send_relative_addr(host, &card->rca);
- if (err)
- goto err;
- mmc_set_bus_mode(host, MMC_BUSMODE_PUSHPULL);
- }
- if (!mmc_host_is_spi(host)) {
- err = mmc_select_card(card);
- if (err)
- goto err;
- }
- /*
- * Switch to high-speed (if supported).
- */
- err = sdio_enable_hs(card);
- if (err > 0)
- mmc_sd_go_highspeed(card);
- else if (err)
- goto err;
- /*
- * Change to the card's maximum speed.
- */
- mmc_set_clock(host, mmc_sdio_get_max_clock(card));
- err = sdio_enable_4bit_bus(card);
- if (err > 0)
- mmc_set_bus_width(host, MMC_BUS_WIDTH_4);
- else if (err)
- goto err;
- mmc_release_host(host);
- return 0;
- err:
- printk("%s: Error resetting SDIO communications (%d)\n",
- mmc_hostname(host), err);
- mmc_release_host(host);
- return err;
- }
- EXPORT_SYMBOL(sdio_reset_comm);