cregit-Linux how code gets into the kernel

Release 4.11 drivers/mmc/core/core.c

Directory: drivers/mmc/core
/*
 *  linux/drivers/mmc/core/core.c
 *
 *  Copyright (C) 2003-2004 Russell King, All Rights Reserved.
 *  SD support Copyright (C) 2004 Ian Molton, All Rights Reserved.
 *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
 *  MMCv4 support Copyright (C) 2006 Philip Langdale, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/completion.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/pagemap.h>
#include <linux/err.h>
#include <linux/leds.h>
#include <linux/scatterlist.h>
#include <linux/log2.h>
#include <linux/regulator/consumer.h>
#include <linux/pm_runtime.h>
#include <linux/pm_wakeup.h>
#include <linux/suspend.h>
#include <linux/fault-inject.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/of.h>

#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
#include <linux/mmc/mmc.h>
#include <linux/mmc/sd.h>
#include <linux/mmc/slot-gpio.h>


#define CREATE_TRACE_POINTS
#include <trace/events/mmc.h>

#include "core.h"
#include "card.h"
#include "bus.h"
#include "host.h"
#include "sdio_bus.h"
#include "pwrseq.h"

#include "mmc_ops.h"
#include "sd_ops.h"
#include "sdio_ops.h"

/* If the device is not responding */

#define MMC_CORE_TIMEOUT_MS	(10 * 60 * 1000) 
/* 10 minute timeout */

/*
 * Background operations can take a long time, depending on the housekeeping
 * operations the card has to perform.
 */

#define MMC_BKOPS_MAX_TIMEOUT	(4 * 60 * 1000) 
/* max time to wait in ms */

/* The max erase timeout, used when host->max_busy_timeout isn't specified */

#define MMC_ERASE_TIMEOUT_MS	(60 * 1000) 
/* 60 s */


static const unsigned freqs[] = { 400000, 300000, 200000, 100000 };

/*
 * Enabling software CRCs on the data blocks can be a significant (30%)
 * performance cost, and for other reasons may not always be desired.
 * So we allow it it to be disabled.
 */

bool use_spi_crc = 1;
module_param(use_spi_crc, bool, 0);




static int mmc_schedule_delayed_work(struct delayed_work *work,
				     unsigned long delay)
{
	/*
         * We use the system_freezable_wq, because of two reasons.
         * First, it allows several works (not the same work item) to be
         * executed simultaneously. Second, the queue becomes frozen when
         * userspace becomes frozen during system PM.
         */
	return queue_delayed_work(system_freezable_wq, work, delay);
}


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#ifdef CONFIG_FAIL_MMC_REQUEST

/*
 * Internal function. Inject random data errors.
 * If mmc_data is NULL no errors are injected.
 */



static void mmc_should_fail_request(struct mmc_host *host,
				    struct mmc_request *mrq)
{
	struct mmc_command *cmd = mrq->cmd;
	struct mmc_data *data = mrq->data;
	static const int data_errors[] = {
		-ETIMEDOUT,
		-EILSEQ,
		-EIO,
        };

	if (!data)
		return;

	if (cmd->error || data->error ||
	    !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
		return;

	data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)];
	data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9;
}


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#else /* CONFIG_FAIL_MMC_REQUEST */




static inline void mmc_should_fail_request(struct mmc_host *host,
					   struct mmc_request *mrq)
{
}


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#endif /* CONFIG_FAIL_MMC_REQUEST */




static inline void mmc_complete_cmd(struct mmc_request *mrq)
{
	if (mrq->cap_cmd_during_tfr && !completion_done(&mrq->cmd_completion))
		complete_all(&mrq->cmd_completion);
}


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void mmc_command_done(struct mmc_host *host, struct mmc_request *mrq)
{
	if (!mrq->cap_cmd_during_tfr)
		return;

	mmc_complete_cmd(mrq);

	pr_debug("%s: cmd done, tfr ongoing (CMD%u)\n",
		 mmc_hostname(host), mrq->cmd->opcode);
}

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EXPORT_SYMBOL(mmc_command_done);

/**
 *      mmc_request_done - finish processing an MMC request
 *      @host: MMC host which completed request
 *      @mrq: MMC request which request
 *
 *      MMC drivers should call this function when they have completed
 *      their processing of a request.
 */



void mmc_request_done(struct mmc_host *host, struct mmc_request *mrq)
{
	struct mmc_command *cmd = mrq->cmd;
	int err = cmd->error;

	/* Flag re-tuning needed on CRC errors */
	if ((cmd->opcode != MMC_SEND_TUNING_BLOCK &&
	    cmd->opcode != MMC_SEND_TUNING_BLOCK_HS200) &&
	    (err == -EILSEQ || (mrq->sbc && mrq->sbc->error == -EILSEQ) ||
	    (mrq->data && mrq->data->error == -EILSEQ) ||
	    (mrq->stop && mrq->stop->error == -EILSEQ)))
		mmc_retune_needed(host);

	if (err && cmd->retries && mmc_host_is_spi(host)) {
		if (cmd->resp[0] & R1_SPI_ILLEGAL_COMMAND)
			cmd->retries = 0;
	}

	if (host->ongoing_mrq == mrq)
		host->ongoing_mrq = NULL;

	mmc_complete_cmd(mrq);

	trace_mmc_request_done(host, mrq);

	if (err && cmd->retries && !mmc_card_removed(host->card)) {
		/*
                 * Request starter must handle retries - see
                 * mmc_wait_for_req_done().
                 */
		if (mrq->done)
			mrq->done(mrq);
	} else {
		mmc_should_fail_request(host, mrq);

		if (!host->ongoing_mrq)
			led_trigger_event(host->led, LED_OFF);

		if (mrq->sbc) {
			pr_debug("%s: req done <CMD%u>: %d: %08x %08x %08x %08x\n",
				mmc_hostname(host), mrq->sbc->opcode,
				mrq->sbc->error,
				mrq->sbc->resp[0], mrq->sbc->resp[1],
				mrq->sbc->resp[2], mrq->sbc->resp[3]);
		}

		pr_debug("%s: req done (CMD%u): %d: %08x %08x %08x %08x\n",
			mmc_hostname(host), cmd->opcode, err,
			cmd->resp[0], cmd->resp[1],
			cmd->resp[2], cmd->resp[3]);

		if (mrq->data) {
			pr_debug("%s:     %d bytes transferred: %d\n",
				mmc_hostname(host),
				mrq->data->bytes_xfered, mrq->data->error);
		}

		if (mrq->stop) {
			pr_debug("%s:     (CMD%u): %d: %08x %08x %08x %08x\n",
				mmc_hostname(host), mrq->stop->opcode,
				mrq->stop->error,
				mrq->stop->resp[0], mrq->stop->resp[1],
				mrq->stop->resp[2], mrq->stop->resp[3]);
		}

		if (mrq->done)
			mrq->done(mrq);
	}
}


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EXPORT_SYMBOL(mmc_request_done);




static void __mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
	int err;

	/* Assumes host controller has been runtime resumed by mmc_claim_host */
	err = mmc_retune(host);
	if (err) {
		mrq->cmd->error = err;
		mmc_request_done(host, mrq);
		return;
	}

	/*
         * For sdio rw commands we must wait for card busy otherwise some
         * sdio devices won't work properly.
         */
	if (mmc_is_io_op(mrq->cmd->opcode) && host->ops->card_busy) {
		int tries = 500; /* Wait aprox 500ms at maximum */

		while (host->ops->card_busy(host) && --tries)
			mmc_delay(1);

		if (tries == 0) {
			mrq->cmd->error = -EBUSY;
			mmc_request_done(host, mrq);
			return;
		}
	}

	if (mrq->cap_cmd_during_tfr) {
		host->ongoing_mrq = mrq;
		/*
                 * Retry path could come through here without having waiting on
                 * cmd_completion, so ensure it is reinitialised.
                 */
		reinit_completion(&mrq->cmd_completion);
	}

	trace_mmc_request_start(host, mrq);

	host->ops->request(host, mrq);
}


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static int mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
{
#ifdef CONFIG_MMC_DEBUG
	unsigned int i, sz;
	struct scatterlist *sg;
#endif
	mmc_retune_hold(host);

	if (mmc_card_removed(host->card))
		return -ENOMEDIUM;

	if (mrq->sbc) {
		pr_debug("<%s: starting CMD%u arg %08x flags %08x>\n",
			 mmc_hostname(host), mrq->sbc->opcode,
			 mrq->sbc->arg, mrq->sbc->flags);
	}

	pr_debug("%s: starting CMD%u arg %08x flags %08x\n",
		 mmc_hostname(host), mrq->cmd->opcode,
		 mrq->cmd->arg, mrq->cmd->flags);

	if (mrq->data) {
		pr_debug("%s:     blksz %d blocks %d flags %08x "
			"tsac %d ms nsac %d\n",
			mmc_hostname(host), mrq->data->blksz,
			mrq->data->blocks, mrq->data->flags,
			mrq->data->timeout_ns / 1000000,
			mrq->data->timeout_clks);
	}

	if (mrq->stop) {
		pr_debug("%s:     CMD%u arg %08x flags %08x\n",
			 mmc_hostname(host), mrq->stop->opcode,
			 mrq->stop->arg, mrq->stop->flags);
	}

	WARN_ON(!host->claimed);

	mrq->cmd->error = 0;
	mrq->cmd->mrq = mrq;
	if (mrq->sbc) {
		mrq->sbc->error = 0;
		mrq->sbc->mrq = mrq;
	}
	if (mrq->data) {
		if (mrq->data->blksz > host->max_blk_size ||
		    mrq->data->blocks > host->max_blk_count ||
		    mrq->data->blocks * mrq->data->blksz > host->max_req_size)
			return -EINVAL;
#ifdef CONFIG_MMC_DEBUG
		sz = 0;
		for_each_sg(mrq->data->sg, sg, mrq->data->sg_len, i)
			sz += sg->length;
		if (sz != mrq->data->blocks * mrq->data->blksz)
			return -EINVAL;
#endif

		mrq->cmd->data = mrq->data;
		mrq->data->error = 0;
		mrq->data->mrq = mrq;
		if (mrq->stop) {
			mrq->data->stop = mrq->stop;
			mrq->stop->error = 0;
			mrq->stop->mrq = mrq;
		}
	}
	led_trigger_event(host->led, LED_FULL);
	__mmc_start_request(host, mrq);

	return 0;
}


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/**
 *      mmc_start_bkops - start BKOPS for supported cards
 *      @card: MMC card to start BKOPS
 *      @form_exception: A flag to indicate if this function was
 *                       called due to an exception raised by the card
 *
 *      Start background operations whenever requested.
 *      When the urgent BKOPS bit is set in a R1 command response
 *      then background operations should be started immediately.
*/



void mmc_start_bkops(struct mmc_card *card, bool from_exception)
{
	int err;
	int timeout;
	bool use_busy_signal;

	if (!card->ext_csd.man_bkops_en || mmc_card_doing_bkops(card))
		return;

	err = mmc_read_bkops_status(card);
	if (err) {
		pr_err("%s: Failed to read bkops status: %d\n",
		       mmc_hostname(card->host), err);
		return;
	}

	if (!card->ext_csd.raw_bkops_status)
		return;

	if (card->ext_csd.raw_bkops_status < EXT_CSD_BKOPS_LEVEL_2 &&
	    from_exception)
		return;

	mmc_claim_host(card->host);
	if (card->ext_csd.raw_bkops_status >= EXT_CSD_BKOPS_LEVEL_2) {
		timeout = MMC_BKOPS_MAX_TIMEOUT;
		use_busy_signal = true;
	} else {
		timeout = 0;
		use_busy_signal = false;
	}

	mmc_retune_hold(card->host);

	err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
			EXT_CSD_BKOPS_START, 1, timeout, 0,
			use_busy_signal, true, false);
	if (err) {
		pr_warn("%s: Error %d starting bkops\n",
			mmc_hostname(card->host), err);
		mmc_retune_release(card->host);
		goto out;
	}

	/*
         * For urgent bkops status (LEVEL_2 and more)
         * bkops executed synchronously, otherwise
         * the operation is in progress
         */
	if (!use_busy_signal)
		mmc_card_set_doing_bkops(card);
	else
		mmc_retune_release(card->host);
out:
	mmc_release_host(card->host);
}

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EXPORT_SYMBOL(mmc_start_bkops);

/*
 * mmc_wait_data_done() - done callback for data request
 * @mrq: done data request
 *
 * Wakes up mmc context, passed as a callback to host controller driver
 */



static void mmc_wait_data_done(struct mmc_request *mrq)
{
	struct mmc_context_info *context_info = &mrq->host->context_info;

	context_info->is_done_rcv = true;
	wake_up_interruptible(&context_info->wait);
}


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static void mmc_wait_done(struct mmc_request *mrq)
{
	complete(&mrq->completion);
}


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static inline void mmc_wait_ongoing_tfr_cmd(struct mmc_host *host)
{
	struct mmc_request *ongoing_mrq = READ_ONCE(host->ongoing_mrq);

	/*
         * If there is an ongoing transfer, wait for the command line to become
         * available.
         */
	if (ongoing_mrq && !completion_done(&ongoing_mrq->cmd_completion))
		wait_for_completion(&ongoing_mrq->cmd_completion);
}


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/*
 *__mmc_start_data_req() - starts data request
 * @host: MMC host to start the request
 * @mrq: data request to start
 *
 * Sets the done callback to be called when request is completed by the card.
 * Starts data mmc request execution
 * If an ongoing transfer is already in progress, wait for the command line
 * to become available before sending another command.
 */



static int __mmc_start_data_req(struct mmc_host *host, struct mmc_request *mrq)
{
	int err;

	mmc_wait_ongoing_tfr_cmd(host);

	mrq->done = mmc_wait_data_done;
	mrq->host = host;

	init_completion(&mrq->cmd_completion);

	err = mmc_start_request(host, mrq);
	if (err) {
		mrq->cmd->error = err;
		mmc_complete_cmd(mrq);
		mmc_wait_data_done(mrq);
	}

	return err;
}


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static int __mmc_start_req(struct mmc_host *host, struct mmc_request *mrq)
{
	int err;

	mmc_wait_ongoing_tfr_cmd(host);

	init_completion(&mrq->completion);
	mrq->done = mmc_wait_done;

	init_completion(&mrq->cmd_completion);

	err = mmc_start_request(host, mrq);
	if (err) {
		mrq->cmd->error = err;
		mmc_complete_cmd(mrq);
		complete(&mrq->completion);
	}

	return err;
}


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/*
 * mmc_wait_for_data_req_done() - wait for request completed
 * @host: MMC host to prepare the command.
 * @mrq: MMC request to wait for
 *
 * Blocks MMC context till host controller will ack end of data request
 * execution or new request notification arrives from the block layer.
 * Handles command retries.
 *
 * Returns enum mmc_blk_status after checking errors.
 */



static enum mmc_blk_status mmc_wait_for_data_req_done(struct mmc_host *host,
						      struct mmc_request *mrq)
{
	struct mmc_command *cmd;
	struct mmc_context_info *context_info = &host->context_info;
	enum mmc_blk_status status;

	while (1) {
		wait_event_interruptible(context_info->wait,
				(context_info->is_done_rcv ||
				 context_info->is_new_req));

		if (context_info->is_done_rcv) {
			context_info->is_done_rcv = false;
			cmd = mrq->cmd;

			if (!cmd->error || !cmd->retries ||
			    mmc_card_removed(host->card)) {
				status = host->areq->err_check(host->card,
							       host->areq);
				break; /* return status */
			} else {
				mmc_retune_recheck(host);
				pr_info("%s: req failed (CMD%u): %d, retrying...\n",
					mmc_hostname(host),
					cmd->opcode, cmd->error);
				cmd->retries--;
				cmd->error = 0;
				__mmc_start_request(host, mrq);
				continue; /* wait for done/new event again */
			}
		}

		return MMC_BLK_NEW_REQUEST;
	}
	mmc_retune_release(host);
	return status;
}


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void mmc_wait_for_req_done(struct mmc_host *host, struct mmc_request *mrq)
{
	struct mmc_command *cmd;

	while (1) {
		wait_for_completion(&mrq->completion);

		cmd = mrq->cmd;

		/*
                 * If host has timed out waiting for the sanitize
                 * to complete, card might be still in programming state
                 * so let's try to bring the card out of programming
                 * state.
                 */
		if (cmd->sanitize_busy && cmd->error == -ETIMEDOUT) {
			if (!mmc_interrupt_hpi(host->card)) {
				pr_warn("%s: %s: Interrupted sanitize\n",
					mmc_hostname(host), __func__);
				cmd->error = 0;
				break;
			} else {
				pr_err("%s: %s: Failed to interrupt sanitize\n",
				       mmc_hostname(host), __func__);
			}
		}
		if (!cmd->error || !cmd->retries ||
		    mmc_card_removed(host->card))
			break;

		mmc_retune_recheck(host);

		pr_debug("%s: req failed (CMD%u): %d, retrying...\n",
			 mmc_hostname(host), cmd->opcode, cmd->error);
		cmd->retries--;
		cmd->error = 0;
		__mmc_start_request(host, mrq);
	}

	mmc_retune_release(host);
}

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EXPORT_SYMBOL(mmc_wait_for_req_done);

/**
 *      mmc_is_req_done - Determine if a 'cap_cmd_during_tfr' request is done
 *      @host: MMC host
 *      @mrq: MMC request
 *
 *      mmc_is_req_done() is used with requests that have
 *      mrq->cap_cmd_during_tfr = true. mmc_is_req_done() must be called after
 *      starting a request and before waiting for it to complete. That is,
 *      either in between calls to mmc_start_req(), or after mmc_wait_for_req()
 *      and before mmc_wait_for_req_done(). If it is called at other times the
 *      result is not meaningful.
 */



bool mmc_is_req_done(struct mmc_host *host, struct mmc_request *mrq)
{
	if (host->areq)
		return host->context_info.is_done_rcv;
	else
		return completion_done(&mrq->completion);
}

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EXPORT_SYMBOL(mmc_is_req_done);

/**
 *      mmc_pre_req - Prepare for a new request
 *      @host: MMC host to prepare command
 *      @mrq: MMC request to prepare for
 *
 *      mmc_pre_req() is called in prior to mmc_start_req() to let
 *      host prepare for the new request. Preparation of a request may be
 *      performed while another request is running on the host.
 */



static void mmc_pre_req(struct mmc_host *host, struct mmc_request *mrq)
{
	if (host->ops->pre_req)
		host->ops->pre_req(host, mrq);
}


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/**
 *      mmc_post_req - Post process a completed request
 *      @host: MMC host to post process command
 *      @mrq: MMC request to post process for
 *      @err: Error, if non zero, clean up any resources made in pre_req
 *
 *      Let the host post process a completed request. Post processing of
 *      a request may be performed while another reuqest is running.
 */



static void mmc_post_req(struct mmc_host *host, struct mmc_request *mrq,
			 int err)
{
	if (host->ops->post_req)
		host->ops->post_req(host, mrq, err);
}


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Total40100.00%1100.00%



/**
 * mmc_finalize_areq() - finalize an asynchronous request
 * @host: MMC host to finalize any ongoing request on
 *
 * Returns the status of the ongoing asynchronous request, but
 * MMC_BLK_SUCCESS if no request was going on.
 */



static enum mmc_blk_status mmc_finalize_areq(struct mmc_host *host)
{
	enum mmc_blk_status status;

	if (!host->areq)
		return MMC_BLK_SUCCESS;

	status = mmc_wait_for_data_req_done(host, host->areq->mrq);
	if (status == MMC_BLK_NEW_REQUEST)
		return status;

	/*
         * Check BKOPS urgency for each R1 response
         */
	if (host->card && mmc_card_mmc(host->card) &&
	    ((mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1) ||
	     (mmc_resp_type(host->areq->mrq->cmd) == MMC_RSP_R1B)) &&
	    (host->areq->mrq->cmd->resp[0] & R1_EXCEPTION_EVENT)) {
		mmc_start_bkops(host->card, true);
	}

	return status;
}


Contributors
PersonTokensPropCommitsCommitProp
Jaehoon Chung7156.80%114.29%


Per Forlin2318.40%114.29%


Linus Walleij1915.20%228.57%


Konstantin Dorfman97.20%114.29%


Srinivas Kandagatla21.60%114.29%


Ulf Hansson10.80%114.29%


Total125100.00%7100.00%



/**
 *      mmc_start_areq - start an asynchronous request
 *      @host: MMC host to start command
 *      @areq: asynchronous request to start
 *      @ret_stat: out parameter for status
 *
 *      Start a new MMC custom command request for a host.
 *      If there is on ongoing async request wait for completion
 *      of that request and start the new one and return.
 *      Does not wait for the new request to complete.
 *
 *      Returns the completed request, NULL in case of none completed.
 *      Wait for the an ongoing request (previoulsy started) to complete and
 *      return the completed request. If there is no ongoing request, NULL
 *      is returned without waiting. NULL is not an error condition.
 */



struct mmc_async_req *mmc_start_areq(struct mmc_host *host,
				     struct mmc_async_req *areq,
				     enum mmc_blk_status *ret_stat)
{
	enum mmc_blk_status status;
	int start_err = 0;
	struct mmc_async_req *data = host->areq;

	/* Prepare a new request */
	if (areq)
		mmc_pre_req(host, areq->mrq);

	/* Finalize previous request */
	status = mmc_finalize_areq(host);

	/* The previous request is still going on... */
	if (status == MMC_BLK_NEW_REQUEST) {
		if (ret_stat)
			*ret_stat = status;
		return NULL;
	}

	/* Fine so far, start the new request! */
	if (status == MMC_BLK_SUCCESS && areq)
		start_err = __mmc_start_data_req(host, areq->mrq);

	/* Postprocess the old request at this point */
	if (host->areq)
		mmc_post_req(host, host->areq->mrq, 0);

	/* Cancel a prepared request if it was not started. */
	if ((status != MMC_BLK_SUCCESS || start_err) && areq)
		mmc_post_req(host, areq->mrq, -EINVAL);

	if (status != MMC_BLK_SUCCESS)
		host->areq = NULL;
	else
		host->areq = areq;

	if (ret_stat)
		*ret_stat = status;
	return data;
}

Contributors
PersonTokensPropCommitsCommitProp
Linus Walleij9553.07%240.00%


Per Forlin6033.52%120.00%


Ulf Hansson2312.85%120.00%


Konstantin Dorfman10.56%120.00%


Total179100.00%5100.00%




EXPORT_SYMBOL(mmc_start_areq);

/**
 *      mmc_wait_for_req - start a request and wait for completion
 *      @host: MMC host to start command
 *      @mrq: MMC request to start
 *
 *      Start a new MMC custom command request for a host, and wait
 *      for the command to complete. In the case of 'cap_cmd_during_tfr'
 *      requests, the transfer is ongoing and the caller can issue further
 *      commands that do not use the data lines, and then wait by calling
 *      mmc_wait_for_req_done().
 *      Does not attempt to parse the response.
 */



void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq)
{
	__mmc_start_req(host, mrq);

	if (!mrq->cap_cmd_during_tfr)
		mmc_wait_for_req_done(host, mrq);
}

Contributors
PersonTokensPropCommitsCommitProp
Per Forlin2672.22%133.33%


Adrian Hunter719.44%133.33%


Russell King38.33%133.33%


Total36100.00%3100.00%




EXPORT_SYMBOL(mmc_wait_for_req);

/**
 *      mmc_interrupt_hpi - Issue for High priority Interrupt
 *      @card: the MMC card associated with the HPI transfer
 *
 *      Issued High Priority Interrupt, and check for card status
 *      until out-of prg-state.
 */



int mmc_interrupt_hpi(struct mmc_card *card)
{
	int err;
	u32 status;
	unsigned long prg_wait;

	if (!card->ext_csd.hpi_en) {
		pr_info("%s: HPI enable bit unset\n", mmc_hostname(card->host));
		return 1;
	}

	mmc_claim_host(card->host);
	err = mmc_send_status(card, &status);
	if (err) {
		pr_err("%s: Get card status fail\n", mmc_hostname(card->host));
		goto out;
	}

	switch (R1_CURRENT_STATE(status)) {
	case R1_STATE_IDLE:
	case R1_STATE_READY:
	case R1_STATE_STBY:
	case R1_STATE_TRAN:
		/*
                 * In idle and transfer states, HPI is not needed and the caller
                 * can issue the next intended command immediately
                 */
		goto out;
	case R1_STATE_PRG:
		break;
	default:
		/* In all other states, it's illegal to issue HPI */
		pr_debug("%s: HPI cannot be sent. Card state=%d\n",
			mmc_hostname(card->host), R1_CURRENT_STATE(status));
		err = -EINVAL;
		goto out;
	}

	err = mmc_send_hpi_cmd(card, &status);
	if (err)
		goto out;

	prg_wait = jiffies + msecs_to_jiffies(card->ext_csd.out_of_int_time);
	do {
		err = mmc_send_status(card, &status);

		if (!err && R1_CURRENT_STATE(status) == R1_STATE_TRAN)
			break;
		if (time_after(jiffies, prg_wait))
			err = -ETIMEDOUT;
	} while (!err);

out:
	mmc_release_host(card->host);
	return err;
}

Contributors
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Jaehoon Chung14161.84%133.33%


Venkatraman Sathiyamoorthy8738.16%266.67%


Total228100.00%3100.00%




EXPORT_SYMBOL(mmc_interrupt_hpi);

/**
 *      mmc_wait_for_cmd - start a command and wait for completion
 *      @host: MMC host to start command
 *      @cmd: MMC command to start
 *      @retries: maximum number of retries
 *
 *      Start a new MMC command for a host, and wait for the command
 *      to complete.  Return any error that occurred while the command
 *      was executing.  Do not attempt to parse the response.
 */



int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd, int retries)
{
	struct mmc_request mrq = {};

	WARN_ON(!host->claimed);

	memset(cmd->resp, 0, sizeof(cmd->resp));
	cmd->retries = retries;

	mrq.cmd = cmd;
	cmd->data = NULL;

	mmc_wait_for_req(host, &mrq);

	return cmd->error;
}


Contributors
PersonTokensPropCommitsCommitProp
Russell King7493.67%233.33%


Pierre Ossman33.80%233.33%


Masahiro Yamada11.27%116.67%


Chris Ball11.27%116.67%


Total79100.00%6100.00%




EXPORT_SYMBOL(mmc_wait_for_cmd);

/**
 *      mmc_stop_bkops - stop ongoing BKOPS
 *      @card: MMC card to check BKOPS
 *
 *      Send HPI command to stop ongoing background operations to
 *      allow rapid servicing of foreground operations, e.g. read/
 *      writes. Wait until the card comes out of the programming state
 *      to avoid errors in servicing read/write requests.
 */



int mmc_stop_bkops(struct mmc_card *card)
{
	int err = 0;

	err = mmc_interrupt_hpi(card);

	/*
         * If err is EINVAL, we can't issue an HPI.
         * It should complete the BKOPS.
         */
	if (!err || (err == -EINVAL)) {
		mmc_card_clr_doing_bkops(card);
		mmc_retune_release(card->host);
		err = 0;
	}

	return err;
}

Contributors
PersonTokensPropCommitsCommitProp
Jaehoon Chung4987.50%150.00%


Adrian Hunter712.50%150.00%


Total56100.00%2100.00%




EXPORT_SYMBOL(mmc_stop_bkops);




int mmc_read_bkops_status(struct mmc_card *card)
{
	int err;
	u8 *ext_csd;

	mmc_claim_host(card->host);
	err = mmc_get_ext_csd(card, &ext_csd);
	mmc_release_host(card->host);
	if (err)
		return err;

	card->ext_csd.raw_bkops_status = ext_csd[EXT_CSD_BKOPS_STATUS];
	card->ext_csd.raw_exception_status = ext_csd[EXT_CSD_EXP_EVENTS_STATUS];
	kfree(ext_csd);
	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Jaehoon Chung7292.31%150.00%


Ulf Hansson67.69%150.00%


Total78100.00%2100.00%




EXPORT_SYMBOL(mmc_read_bkops_status);

/**
 *      mmc_set_data_timeout - set the timeout for a data command
 *      @data: data phase for command
 *      @card: the MMC card associated with the data transfer
 *
 *      Computes the data timeout parameters according to the
 *      correct algorithm given the card type.
 */



void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card)
{
	unsigned int mult;

	/*
         * SDIO cards only define an upper 1 s limit on access.
         */
	if (mmc_card_sdio(card)) {
		data->timeout_ns = 1000000000;
		data->timeout_clks = 0;
		return;
	}

	/*
         * SD cards use a 100 multiplier rather than 10
         */
	mult = mmc_card_sd(card) ? 100 : 10;

	/*
         * Scale up the multiplier (and therefore the timeout) by
         * the r2w factor for writes.
         */
	if (data->flags & MMC_DATA_WRITE)
		mult <<= card->csd.r2w_factor;

	data->timeout_ns = card->csd.tacc_ns * mult;
	data->timeout_clks = card->csd.tacc_clks * mult;

	/*
         * SD cards also have an upper limit on the timeout.
         */
	if (mmc_card_sd(card)) {
		unsigned int timeout_us, limit_us;

		timeout_us = data->timeout_ns / 1000;
		if (card->host->ios.clock)
			timeout_us += data->timeout_clks * 1000 /
				(card->host->ios.clock / 1000);

		if (data->flags & MMC_DATA_WRITE)
			/*
                         * The MMC spec "It is strongly recommended
                         * for hosts to implement more than 500ms
                         * timeout value even if the card indicates
                         * the 250ms maximum busy length."  Even the
                         * previous value of 300ms is known to be
                         * insufficient for some cards.
                         */
			limit_us = 3000000;
		else
			limit_us = 100000;

		/*
                 * SDHC cards always use these fixed values.
                 */
		if (timeout_us > limit_us || mmc_card_blockaddr(card)) {
			data->timeout_ns = limit_us * 1000;
			data->timeout_clks = 0;
		}

		/* assign limit value if invalid */
		if (timeout_us == 0)
			data->timeout_ns = limit_us * 1000;
	}

	/*
         * Some cards require longer data read timeout than indicated in CSD.
         * Address this by setting the read timeout to a "reasonably high"
         * value. For the cards tested, 600ms has proven enough. If necessary,
         * this value can be increased if other problematic cards require this.
         */
	if (mmc_card_long_read_time(card) && data->flags & MMC_DATA_READ) {
		data->timeout_ns = 600000000;
		data->timeout_clks = 0;
	}

	/*
         * Some cards need very high timeouts if driven in SPI mode.
         * The worst observed timeout was 900ms after writing a
         * continuous stream of data until the internal logic
         * overflowed.
         */
	if (mmc_host_is_spi(card->host)) {
		if (data->flags & MMC_DATA_WRITE) {
			if (data->timeout_ns < 1000000000)
				data->timeout_ns = 1000000000;	/* 1s */
		} else {
			if (data->timeout_ns < 100000000)
				data->timeout_ns =  100000000;	/* 100ms */
		}
	}
}

Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman18061.22%436.36%


Wolfgang Mües5518.71%19.09%


Stefan Nilsson XK268.84%19.09%


Stefan Wahren155.10%19.09%


Ulf Hansson82.72%19.09%


Linus Walleij62.04%19.09%


Matt Gumbel20.68%19.09%


Paul Walmsley20.68%19.09%


Total294100.00%11100.00%




EXPORT_SYMBOL(mmc_set_data_timeout);

/**
 *      mmc_align_data_size - pads a transfer size to a more optimal value
 *      @card: the MMC card associated with the data transfer
 *      @sz: original transfer size
 *
 *      Pads the original data size with a number of extra bytes in
 *      order to avoid controller bugs and/or performance hits
 *      (e.g. some controllers revert to PIO for certain sizes).
 *
 *      Returns the improved size, which might be unmodified.
 *
 *      Note that this function is only relevant when issuing a
 *      single scatter gather entry.
 */



unsigned int mmc_align_data_size(struct mmc_card *card, unsigned int sz)
{
	/*
         * FIXME: We don't have a system for the controller to tell
         * the core about its problems yet, so for now we just 32-bit
         * align the size.
         */
	sz = ((sz + 3) / 4) * 4;

	return sz;
}

Contributors
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Pierre Ossman33100.00%1100.00%


Total33100.00%1100.00%




EXPORT_SYMBOL(mmc_align_data_size);

/**
 *      __mmc_claim_host - exclusively claim a host
 *      @host: mmc host to claim
 *      @abort: whether or not the operation should be aborted
 *
 *      Claim a host for a set of operations.  If @abort is non null and
 *      dereference a non-zero value then this will return prematurely with
 *      that non-zero value without acquiring the lock.  Returns zero
 *      with the lock held otherwise.
 */



int __mmc_claim_host(struct mmc_host *host, atomic_t *abort)
{
	DECLARE_WAITQUEUE(wait, current);
	unsigned long flags;
	int stop;
	bool pm = false;

	might_sleep();

	add_wait_queue(&host->wq, &wait);
	spin_lock_irqsave(&host->lock, flags);
	while (1) {
		set_current_state(TASK_UNINTERRUPTIBLE);
		stop = abort ? atomic_read(abort) : 0;
		if (stop || !host->claimed || host->claimer == current)
			break;
		spin_unlock_irqrestore(&host->lock, flags);
		schedule();
		spin_lock_irqsave(&host->lock, flags);
	}
	set_current_state(TASK_RUNNING);
	if (!stop) {
		host->claimed = 1;
		host->claimer = current;
		host->claim_cnt += 1;
		if (host->claim_cnt == 1)
			pm = true;
	} else
		wake_up(&host->wq);
	spin_unlock_irqrestore(&host->lock, flags);
	remove_wait_queue(&host->wq, &wait);

	if (pm)
		pm_runtime_get_sync(mmc_dev(host));

	return stop;
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter16982.44%240.00%


Ulf Hansson2914.15%120.00%


Pierre Ossman52.44%120.00%


Nico Pitre20.98%120.00%


Total205100.00%5100.00%




EXPORT_SYMBOL(__mmc_claim_host);

/**
 *      mmc_release_host - release a host
 *      @host: mmc host to release
 *
 *      Release a MMC host, allowing others to claim the host
 *      for their operations.
 */



void mmc_release_host(struct mmc_host *host)
{
	unsigned long flags;

	WARN_ON(!host->claimed);

	spin_lock_irqsave(&host->lock, flags);
	if (--host->claim_cnt) {
		/* Release for nested claim */
		spin_unlock_irqrestore(&host->lock, flags);
	} else {
		host->claimed = 0;
		host->claimer = NULL;
		spin_unlock_irqrestore(&host->lock, flags);
		wake_up(&host->wq);
		pm_runtime_mark_last_busy(mmc_dev(host));
		pm_runtime_put_autosuspend(mmc_dev(host));
	}
}

Contributors
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Adrian Hunter6059.41%350.00%


Pierre Ossman2524.75%233.33%


Ulf Hansson1615.84%116.67%


Total101100.00%6100.00%




EXPORT_SYMBOL(mmc_release_host);

/*
 * This is a helper function, which fetches a runtime pm reference for the
 * card device and also claims the host.
 */



void mmc_get_card(struct mmc_card *card)
{
	pm_runtime_get_sync(&card->dev);
	mmc_claim_host(card->host);
}

Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson25100.00%1100.00%


Total25100.00%1100.00%




EXPORT_SYMBOL(mmc_get_card);

/*
 * This is a helper function, which releases the host and drops the runtime
 * pm reference for the card device.
 */



void mmc_put_card(struct mmc_card *card)
{
	mmc_release_host(card->host);
	pm_runtime_mark_last_busy(&card->dev);
	pm_runtime_put_autosuspend(&card->dev);
}

Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson33100.00%1100.00%


Total33100.00%1100.00%




EXPORT_SYMBOL(mmc_put_card);

/*
 * Internal function that does the actual ios call to the host driver,
 * optionally printing some debug output.
 */



static inline void mmc_set_ios(struct mmc_host *host)
{
	struct mmc_ios *ios = &host->ios;

	pr_debug("%s: clock %uHz busmode %u powermode %u cs %u Vdd %u "
		"width %u timing %u\n",
		 mmc_hostname(host), ios->clock, ios->bus_mode,
		 ios->power_mode, ios->chip_select, ios->vdd,
		 1 << ios->bus_width, ios->timing);

	host->ops->set_ios(host, ios);
}


Contributors
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Pierre Ossman4155.41%250.00%


Russell King3141.89%125.00%


Wolfram Sang22.70%125.00%


Total74100.00%4100.00%



/*
 * Control chip select pin on a host.
 */



void mmc_set_chip_select(struct mmc_host *host, int mode)
{
	host->ios.chip_select = mode;
	mmc_set_ios(host);
}


Contributors
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Russell King1765.38%150.00%


Pierre Ossman934.62%150.00%


Total26100.00%2100.00%



/*
 * Sets the host clock to the highest possible frequency that
 * is below "hz".
 */



void mmc_set_clock(struct mmc_host *host, unsigned int hz)
{
	WARN_ON(hz && hz < host->f_min);

	if (hz > host->f_max)
		hz = host->f_max;

	host->ios.clock = hz;
	mmc_set_ios(host);
}


Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman4994.23%133.33%


Adrian Hunter23.85%133.33%


Ulf Hansson11.92%133.33%


Total52100.00%3100.00%






int mmc_execute_tuning(struct mmc_card *card)
{
	struct mmc_host *host = card->host;
	u32 opcode;
	int err;

	if (!host->ops->execute_tuning)
		return 0;

	if (mmc_card_mmc(card))
		opcode = MMC_SEND_TUNING_BLOCK_HS200;
	else
		opcode = MMC_SEND_TUNING_BLOCK;

	err = host->ops->execute_tuning(host, opcode);

	if (err)
		pr_err("%s: tuning execution failed: %d\n",
			mmc_hostname(host), err);
	else
		mmc_retune_enable(host);

	return err;
}


Contributors
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Adrian Hunter8896.70%266.67%


Russell King33.30%133.33%


Total91100.00%3100.00%



/*
 * Change the bus mode (open drain/push-pull) of a host.
 */



void mmc_set_bus_mode(struct mmc_host *host, unsigned int mode)
{
	host->ios.bus_mode = mode;
	mmc_set_ios(host);
}


Contributors
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Pierre Ossman27100.00%1100.00%


Total27100.00%1100.00%



/*
 * Change data bus width of a host.
 */



void mmc_set_bus_width(struct mmc_host *host, unsigned int width)
{
	host->ios.bus_width = width;
	mmc_set_ios(host);
}


Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman2696.30%150.00%


Philip Rakity13.70%150.00%


Total27100.00%2100.00%



/*
 * Set initial state after a power cycle or a hw_reset.
 */



void mmc_set_initial_state(struct mmc_host *host)
{
	mmc_retune_disable(host);

	if (mmc_host_is_spi(host))
		host->ios.chip_select = MMC_CS_HIGH;
	else
		host->ios.chip_select = MMC_CS_DONTCARE;
	host->ios.bus_mode = MMC_BUSMODE_PUSHPULL;
	host->ios.bus_width = MMC_BUS_WIDTH_1;
	host->ios.timing = MMC_TIMING_LEGACY;
	host->ios.drv_type = 0;
	host->ios.enhanced_strobe = false;

	/*
         * Make sure we are in non-enhanced strobe mode before we
         * actually enable it in ext_csd.
         */
	if ((host->caps2 & MMC_CAP2_HS400_ES) &&
	     host->ops->hs400_enhanced_strobe)
		host->ops->hs400_enhanced_strobe(host, &host->ios);

	mmc_set_ios(host);
}


Contributors
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Johan Rudholm6354.78%125.00%


Shawn Lin3933.91%125.00%


Adrian Hunter1311.30%250.00%


Total115100.00%4100.00%



/**
 * mmc_vdd_to_ocrbitnum - Convert a voltage to the OCR bit number
 * @vdd:        voltage (mV)
 * @low_bits:   prefer low bits in boundary cases
 *
 * This function returns the OCR bit number according to the provided @vdd
 * value. If conversion is not possible a negative errno value returned.
 *
 * Depending on the @low_bits flag the function prefers low or high OCR bits
 * on boundary voltages. For example,
 * with @low_bits = true, 3300 mV translates to ilog2(MMC_VDD_32_33);
 * with @low_bits = false, 3300 mV translates to ilog2(MMC_VDD_33_34);
 *
 * Any value in the [1951:1999] range translates to the ilog2(MMC_VDD_20_21).
 */



static int mmc_vdd_to_ocrbitnum(int vdd, bool low_bits)
{
	const int max_bit = ilog2(MMC_VDD_35_36);
	int bit;

	if (vdd < 1650 || vdd > 3600)
		return -EINVAL;

	if (vdd >= 1650 && vdd <= 1950)
		return ilog2(MMC_VDD_165_195);

	if (low_bits)
		vdd -= 1;

	/* Base 2000 mV, step 100 mV, bit's base 8. */
	bit = (vdd - 2000) / 100 + 8;
	if (bit > max_bit)
		return max_bit;
	return bit;
}


Contributors
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Anton Vorontsov87100.00%1100.00%


Total87100.00%1100.00%



/**
 * mmc_vddrange_to_ocrmask - Convert a voltage range to the OCR mask
 * @vdd_min:    minimum voltage value (mV)
 * @vdd_max:    maximum voltage value (mV)
 *
 * This function returns the OCR mask bits according to the provided @vdd_min
 * and @vdd_max values. If conversion is not possible the function returns 0.
 *
 * Notes wrt boundary cases:
 * This function sets the OCR bits for all boundary voltages, for example
 * [3300:3400] range is translated to MMC_VDD_32_33 | MMC_VDD_33_34 |
 * MMC_VDD_34_35 mask.
 */



u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max)
{
	u32 mask = 0;

	if (vdd_max < vdd_min)
		return 0;

	/* Prefer high bits for the boundary vdd_max values. */
	vdd_max = mmc_vdd_to_ocrbitnum(vdd_max, false);
	if (vdd_max < 0)
		return 0;

	/* Prefer low bits for the boundary vdd_min values. */
	vdd_min = mmc_vdd_to_ocrbitnum(vdd_min, true);
	if (vdd_min < 0)
		return 0;

	/* Fill the mask, from max bit to min bit. */
	while (vdd_max >= vdd_min)
		mask |= 1 << vdd_max--;

	return mask;
}

Contributors
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Anton Vorontsov80100.00%1100.00%


Total80100.00%1100.00%




EXPORT_SYMBOL(mmc_vddrange_to_ocrmask);

#ifdef CONFIG_OF

/**
 * mmc_of_parse_voltage - return mask of supported voltages
 * @np: The device node need to be parsed.
 * @mask: mask of voltages available for MMC/SD/SDIO
 *
 * Parse the "voltage-ranges" DT property, returning zero if it is not
 * found, negative errno if the voltage-range specification is invalid,
 * or one if the voltage-range is specified and successfully parsed.
 */



int mmc_of_parse_voltage(struct device_node *np, u32 *mask)
{
	const u32 *voltage_ranges;
	int num_ranges, i;

	voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);
	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;
	if (!voltage_ranges) {
		pr_debug("%s: voltage-ranges unspecified\n", np->full_name);
		return 0;
	}
	if (!num_ranges) {
		pr_err("%s: voltage-ranges empty\n", np->full_name);
		return -EINVAL;
	}

	for (i = 0; i < num_ranges; i++) {
		const int j = i * 2;
		u32 ocr_mask;

		ocr_mask = mmc_vddrange_to_ocrmask(
				be32_to_cpu(voltage_ranges[j]),
				be32_to_cpu(voltage_ranges[j + 1]));
		if (!ocr_mask) {
			pr_err("%s: voltage-range #%d is invalid\n",
				np->full_name, i);
			return -EINVAL;
		}
		*mask |= ocr_mask;
	}

	return 1;
}

Contributors
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Haijun Zhang14687.95%133.33%


Russell King2012.05%266.67%


Total166100.00%3100.00%




EXPORT_SYMBOL(mmc_of_parse_voltage);

#endif /* CONFIG_OF */




static int mmc_of_get_func_num(struct device_node *node)
{
	u32 reg;
	int ret;

	ret = of_property_read_u32(node, "reg", &reg);
	if (ret < 0)
		return ret;

	return reg;
}


Contributors
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Sascha Hauer41100.00%1100.00%


Total41100.00%1100.00%






struct device_node *mmc_of_find_child_device(struct mmc_host *host,
		unsigned func_num)
{
	struct device_node *node;

	if (!host->parent || !host->parent->of_node)
		return NULL;

	for_each_child_of_node(host->parent->of_node, node) {
		if (mmc_of_get_func_num(node) == func_num)
			return node;
	}

	return NULL;
}


Contributors
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Sascha Hauer60100.00%1100.00%


Total60100.00%1100.00%



#ifdef CONFIG_REGULATOR

/**
 * mmc_ocrbitnum_to_vdd - Convert a OCR bit number to its voltage
 * @vdd_bit:    OCR bit number
 * @min_uV:     minimum voltage value (mV)
 * @max_uV:     maximum voltage value (mV)
 *
 * This function returns the voltage range according to the provided OCR
 * bit number. If conversion is not possible a negative errno value returned.
 */



static int mmc_ocrbitnum_to_vdd(int vdd_bit, int *min_uV, int *max_uV)
{
	int		tmp;

	if (!vdd_bit)
		return -EINVAL;

	/*
         * REVISIT mmc_vddrange_to_ocrmask() may have set some
         * bits this regulator doesn't quite support ... don't
         * be too picky, most cards and regulators are OK with
         * a 0.1V range goof (it's a small error percentage).
         */
	tmp = vdd_bit - ilog2(MMC_VDD_165_195);
	if (tmp == 0) {
		*min_uV = 1650 * 1000;
		*max_uV = 1950 * 1000;
	} else {
		*min_uV = 1900 * 1000 + tmp * 100 * 1000;
		*max_uV = *min_uV + 100 * 1000;
	}

	return 0;
}


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Heiko Stübner90100.00%1100.00%


Total90100.00%1100.00%



/**
 * mmc_regulator_get_ocrmask - return mask of supported voltages
 * @supply: regulator to use
 *
 * This returns either a negative errno, or a mask of voltages that
 * can be provided to MMC/SD/SDIO devices using the specified voltage
 * regulator.  This would normally be called before registering the
 * MMC host adapter.
 */



int mmc_regulator_get_ocrmask(struct regulator *supply)
{
	int			result = 0;
	int			count;
	int			i;
	int			vdd_uV;
	int			vdd_mV;

	count = regulator_count_voltages(supply);
	if (count < 0)
		return count;

	for (i = 0; i < count; i++) {
		vdd_uV = regulator_list_voltage(supply, i);
		if (vdd_uV <= 0)
			continue;

		vdd_mV = vdd_uV / 1000;
		result |= mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
	}

	if (!result) {
		vdd_uV = regulator_get_voltage(supply);
		if (vdd_uV <= 0)
			return vdd_uV;

		vdd_mV = vdd_uV / 1000;
		result = mmc_vddrange_to_ocrmask(vdd_mV, vdd_mV);
	}

	return result;
}

Contributors
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David Brownell8666.15%150.00%


Javier Martinez Canillas4433.85%150.00%


Total130100.00%2100.00%




EXPORT_SYMBOL_GPL(mmc_regulator_get_ocrmask);

/**
 * mmc_regulator_set_ocr - set regulator to match host->ios voltage
 * @mmc: the host to regulate
 * @supply: regulator to use
 * @vdd_bit: zero for power off, else a bit number (host->ios.vdd)
 *
 * Returns zero on success, else negative errno.
 *
 * MMC host drivers may use this to enable or disable a regulator using
 * a particular supply voltage.  This would normally be called from the
 * set_ios() method.
 */



int mmc_regulator_set_ocr(struct mmc_host *mmc,
			struct regulator *supply,
			unsigned short vdd_bit)
{
	int			result = 0;
	int			min_uV, max_uV;

	if (vdd_bit) {
		mmc_ocrbitnum_to_vdd(vdd_bit, &min_uV, &max_uV);

		result = regulator_set_voltage(supply, min_uV, max_uV);
		if (result == 0 && !mmc->regulator_enabled) {
			result = regulator_enable(supply);
			if (!result)
				mmc->regulator_enabled = true;
		}
	} else if (mmc->regulator_enabled) {
		result = regulator_disable(supply);
		if (result == 0)
			mmc->regulator_enabled = false;
	}

	if (result)
		dev_err(mmc_dev(mmc),
			"could not set regulator OCR (%d)\n", result);
	return result;
}

Contributors
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David Brownell7656.30%133.33%


Linus Walleij5238.52%133.33%


Heiko Stübner75.19%133.33%


Total135100.00%3100.00%




EXPORT_SYMBOL_GPL(mmc_regulator_set_ocr);




static int mmc_regulator_set_voltage_if_supported(struct regulator *regulator,
						  int min_uV, int target_uV,
						  int max_uV)
{
	/*
         * Check if supported first to avoid errors since we may try several
         * signal levels during power up and don't want to show errors.
         */
	if (!regulator_is_supported_voltage(regulator, min_uV, max_uV))
		return -EINVAL;

	return regulator_set_voltage_triplet(regulator, min_uV, target_uV,
					     max_uV);
}


Contributors
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Douglas Anderson49100.00%1100.00%


Total49100.00%1100.00%



/**
 * mmc_regulator_set_vqmmc - Set VQMMC as per the ios
 *
 * For 3.3V signaling, we try to match VQMMC to VMMC as closely as possible.
 * That will match the behavior of old boards where VQMMC and VMMC were supplied
 * by the same supply.  The Bus Operating conditions for 3.3V signaling in the
 * SD card spec also define VQMMC in terms of VMMC.
 * If this is not possible we'll try the full 2.7-3.6V of the spec.
 *
 * For 1.2V and 1.8V signaling we'll try to get as close as possible to the
 * requested voltage.  This is definitely a good idea for UHS where there's a
 * separate regulator on the card that's trying to make 1.8V and it's best if
 * we match.
 *
 * This function is expected to be used by a controller's
 * start_signal_voltage_switch() function.
 */



int mmc_regulator_set_vqmmc(struct mmc_host *mmc, struct mmc_ios *ios)
{
	struct device *dev = mmc_dev(mmc);
	int ret, volt, min_uV, max_uV;

	/* If no vqmmc supply then we can't change the voltage */
	if (IS_ERR(mmc->supply.vqmmc))
		return -EINVAL;

	switch (ios->signal_voltage) {
	case MMC_SIGNAL_VOLTAGE_120:
		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
						1100000, 1200000, 1300000);
	case MMC_SIGNAL_VOLTAGE_180:
		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
						1700000, 1800000, 1950000);
	case MMC_SIGNAL_VOLTAGE_330:
		ret = mmc_ocrbitnum_to_vdd(mmc->ios.vdd, &volt, &max_uV);
		if (ret < 0)
			return ret;

		dev_dbg(dev, "%s: found vmmc voltage range of %d-%duV\n",
			__func__, volt, max_uV);

		min_uV = max(volt - 300000, 2700000);
		max_uV = min(max_uV + 200000, 3600000);

		/*
                 * Due to a limitation in the current implementation of
                 * regulator_set_voltage_triplet() which is taking the lowest
                 * voltage possible if below the target, search for a suitable
                 * voltage in two steps and try to stay close to vmmc
                 * with a 0.3V tolerance at first.
                 */
		if (!mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
						min_uV, volt, max_uV))
			return 0;

		return mmc_regulator_set_voltage_if_supported(mmc->supply.vqmmc,
						2700000, volt, 3600000);
	default:
		return -EINVAL;
	}
}

Contributors
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Douglas Anderson203100.00%1100.00%


Total203100.00%1100.00%




EXPORT_SYMBOL_GPL(mmc_regulator_set_vqmmc);

#endif /* CONFIG_REGULATOR */




int mmc_regulator_get_supply(struct mmc_host *mmc)
{
	struct device *dev = mmc_dev(mmc);
	int ret;

	mmc->supply.vmmc = devm_regulator_get_optional(dev, "vmmc");
	mmc->supply.vqmmc = devm_regulator_get_optional(dev, "vqmmc");

	if (IS_ERR(mmc->supply.vmmc)) {
		if (PTR_ERR(mmc->supply.vmmc) == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		dev_dbg(dev, "No vmmc regulator found\n");
	} else {
		ret = mmc_regulator_get_ocrmask(mmc->supply.vmmc);
		if (ret > 0)
			mmc->ocr_avail = ret;
		else
			dev_warn(dev, "Failed getting OCR mask: %d\n", ret);
	}

	if (IS_ERR(mmc->supply.vqmmc)) {
		if (PTR_ERR(mmc->supply.vqmmc) == -EPROBE_DEFER)
			return -EPROBE_DEFER;
		dev_dbg(dev, "No vqmmc regulator found\n");
	}

	return 0;
}

Contributors
PersonTokensPropCommitsCommitProp
Guennadi Liakhovetski8652.44%125.00%


Tim Kryger7545.73%125.00%


Ludovic Desroches21.22%125.00%


Mark Brown10.61%125.00%


Total164100.00%4100.00%




EXPORT_SYMBOL_GPL(mmc_regulator_get_supply);

/*
 * Mask off any voltages we don't support and select
 * the lowest voltage
 */



u32 mmc_select_voltage(struct mmc_host *host, u32 ocr)
{
	int bit;

	/*
         * Sanity check the voltages that the card claims to
         * support.
         */
	if (ocr & 0x7F) {
		dev_warn(mmc_dev(host),
		"card claims to support voltages below defined range\n");
		ocr &= ~0x7F;
	}

	ocr &= host->ocr_avail;
	if (!ocr) {
		dev_warn(mmc_dev(host), "no support for card's volts\n");
		return 0;
	}

	if (host->caps2 & MMC_CAP2_FULL_PWR_CYCLE) {
		bit = ffs(ocr) - 1;
		ocr &= 3 << bit;
		mmc_power_cycle(host, ocr);
	} else {
		bit = fls(ocr) - 1;
		ocr &= 3 << bit;
		if (bit != host->ios.vdd)
			dev_warn(mmc_dev(host), "exceeding card's volts\n");
	}

	return ocr;
}


Contributors
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Ulf Hansson8158.27%233.33%


Pierre Ossman3424.46%116.67%


Russell King1410.07%116.67%


Mika Westerberg75.04%116.67%


David Brownell32.16%116.67%


Total139100.00%6100.00%






int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage)
{
	int err = 0;
	int old_signal_voltage = host->ios.signal_voltage;

	host->ios.signal_voltage = signal_voltage;
	if (host->ops->start_signal_voltage_switch)
		err = host->ops->start_signal_voltage_switch(host, &host->ios);

	if (err)
		host->ios.signal_voltage = old_signal_voltage;

	return err;

}


Contributors
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Johan Rudholm7398.65%150.00%


Ulf Hansson11.35%150.00%


Total74100.00%2100.00%






int mmc_set_uhs_voltage(struct mmc_host *host, u32 ocr)
{
	struct mmc_command cmd = {};
	int err = 0;
	u32 clock;

	/*
         * If we cannot switch voltages, return failure so the caller
         * can continue without UHS mode
         */
	if (!host->ops->start_signal_voltage_switch)
		return -EPERM;
	if (!host->ops->card_busy)
		pr_warn("%s: cannot verify signal voltage switch\n",
			mmc_hostname(host));

	cmd.opcode = SD_SWITCH_VOLTAGE;
	cmd.arg = 0;
	cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;

	err = mmc_wait_for_cmd(host, &cmd, 0);
	if (err)
		return err;

	if (!mmc_host_is_spi(host) && (cmd.resp[0] & R1_ERROR))
		return -EIO;

	/*
         * The card should drive cmd and dat[0:3] low immediately
         * after the response of cmd11, but wait 1 ms to be sure
         */
	mmc_delay(1);
	if (host->ops->card_busy && !host->ops->card_busy(host)) {
		err = -EAGAIN;
		goto power_cycle;
	}
	/*
         * During a signal voltage level switch, the clock must be gated
         * for 5 ms according to the SD spec
         */
	clock = host->ios.clock;
	host->ios.clock = 0;
	mmc_set_ios(host);

	if (mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180)) {
		/*
                 * Voltages may not have been switched, but we've already
                 * sent CMD11, so a power cycle is required anyway
                 */
		err = -EAGAIN;
		goto power_cycle;
	}

	/* Keep clock gated for at least 10 ms, though spec only says 5 ms */
	mmc_delay(10);
	host->ios.clock = clock;
	mmc_set_ios(host);

	/* Wait for at least 1 ms according to spec */
	mmc_delay(1);

	/*
         * Failure to switch is indicated by the card holding
         * dat[0:3] low
         */
	if (host->ops->card_busy && host->ops->card_busy(host))
		err = -EAGAIN;

power_cycle:
	if (err) {
		pr_debug("%s: Signal voltage switch failed, "
			"power cycling card\n", mmc_hostname(host));
		mmc_power_cycle(host, ocr);
	}

	return err;
}


Contributors
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Johan Rudholm17664.00%19.09%


Arindam Nath8229.82%19.09%


Ulf Hansson124.36%545.45%


Douglas Anderson20.73%19.09%


Masahiro Yamada10.36%19.09%


Sujit Reddy Thumma10.36%19.09%


Joe Perches10.36%19.09%


Total275100.00%11100.00%



/*
 * Select timing parameters for host.
 */



void mmc_set_timing(struct mmc_host *host, unsigned int timing)
{
	host->ios.timing = timing;
	mmc_set_ios(host);
}


Contributors
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Pierre Ossman27100.00%2100.00%


Total27100.00%2100.00%



/*
 * Select appropriate driver type for host.
 */



void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type)
{
	host->ios.drv_type = drv_type;
	mmc_set_ios(host);
}


Contributors
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Arindam Nath27100.00%1100.00%


Total27100.00%1100.00%






int mmc_select_drive_strength(struct mmc_card *card, unsigned int max_dtr,
			      int card_drv_type, int *drv_type)
{
	struct mmc_host *host = card->host;
	int host_drv_type = SD_DRIVER_TYPE_B;

	*drv_type = 0;

	if (!host->ops->select_drive_strength)
		return 0;

	/* Use SD definition of driver strength for hosts */
	if (host->caps & MMC_CAP_DRIVER_TYPE_A)
		host_drv_type |= SD_DRIVER_TYPE_A;

	if (host->caps & MMC_CAP_DRIVER_TYPE_C)
		host_drv_type |= SD_DRIVER_TYPE_C;

	if (host->caps & MMC_CAP_DRIVER_TYPE_D)
		host_drv_type |= SD_DRIVER_TYPE_D;

	/*
         * The drive strength that the hardware can support
         * depends on the board design.  Pass the appropriate
         * information and let the hardware specific code
         * return what is possible given the options
         */
	return host->ops->select_drive_strength(card, max_dtr,
						host_drv_type,
						card_drv_type,
						drv_type);
}


Contributors
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Adrian Hunter10799.07%150.00%


Ulf Hansson10.93%150.00%


Total108100.00%2100.00%



/*
 * Apply power to the MMC stack.  This is a two-stage process.
 * First, we enable power to the card without the clock running.
 * We then wait a bit for the power to stabilise.  Finally,
 * enable the bus drivers and clock to the card.
 *
 * We must _NOT_ enable the clock prior to power stablising.
 *
 * If a host does all the power sequencing itself, ignore the
 * initial MMC_POWER_UP stage.
 */



void mmc_power_up(struct mmc_host *host, u32 ocr)
{
	if (host->ios.power_mode == MMC_POWER_ON)
		return;

	mmc_pwrseq_pre_power_on(host);

	host->ios.vdd = fls(ocr) - 1;
	host->ios.power_mode = MMC_POWER_UP;
	/* Set initial state and call mmc_set_ios */
	mmc_set_initial_state(host);

	/* Try to set signal voltage to 3.3V but fall back to 1.8v or 1.2v */
	if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_330))
		dev_dbg(mmc_dev(host), "Initial signal voltage of 3.3v\n");
	else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_180))
		dev_dbg(mmc_dev(host), "Initial signal voltage of 1.8v\n");
	else if (!mmc_set_signal_voltage(host, MMC_SIGNAL_VOLTAGE_120))
		dev_dbg(mmc_dev(host), "Initial signal voltage of 1.2v\n");

	/*
         * This delay should be sufficient to allow the power supply
         * to reach the minimum voltage.
         */
	mmc_delay(10);

	mmc_pwrseq_post_power_on(host);

	host->ios.clock = host->f_init;

	host->ios.power_mode = MMC_POWER_ON;
	mmc_set_ios(host);

	/*
         * This delay must be at least 74 clock sizes, or 1 ms, or the
         * time required to reach a stable voltage.
         */
	mmc_delay(10);
}


Contributors
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Tim Kryger5132.08%14.76%


Pierre Ossman3622.64%523.81%


Ulf Hansson3421.38%523.81%


Russell King148.81%29.52%


Aaron Lu63.77%14.76%


Philip Langdale42.52%14.76%


Balaji Rao42.52%14.76%


David Brownell42.52%14.76%


Johan Rudholm21.26%14.76%


José M. Fernández21.26%14.76%


Sascha Hauer10.63%14.76%


Hein Tibosch10.63%14.76%


Total159100.00%21100.00%






void mmc_power_off(struct mmc_host *host)
{
	if (host->ios.power_mode == MMC_POWER_OFF)
		return;

	mmc_pwrseq_power_off(host);

	host->ios.clock = 0;
	host->ios.vdd = 0;

	host->ios.power_mode = MMC_POWER_OFF;
	/* Set initial state and call mmc_set_ios */
	mmc_set_initial_state(host);

	/*
         * Some configurations, such as the 802.11 SDIO card in the OLPC
         * XO-1.5, require a short delay after poweroff before the card
         * can be successfully turned on again.
         */
	mmc_delay(1);
}


Contributors
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Pierre Ossman3048.39%440.00%


Ulf Hansson1625.81%220.00%


Daniel Drake69.68%110.00%


Philip Langdale46.45%110.00%


Russell King46.45%110.00%


Johan Rudholm23.23%110.00%


Total62100.00%10100.00%






void mmc_power_cycle(struct mmc_host *host, u32 ocr)
{
	mmc_power_off(host);
	/* Wait at least 1 ms according to SD spec */
	mmc_delay(1);
	mmc_power_up(host, ocr);
}


Contributors
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Johan Rudholm2683.87%150.00%


Ulf Hansson516.13%150.00%


Total31100.00%2100.00%



/*
 * Cleanup when the last reference to the bus operator is dropped.
 */



static void __mmc_release_bus(struct mmc_host *host)
{
	WARN_ON(!host->bus_dead);

	host->bus_ops = NULL;
}


Contributors
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Adrian Bunk2496.00%266.67%


Shawn Lin14.00%133.33%


Total25100.00%3100.00%



/*
 * Increase reference count of bus operator
 */



static inline void mmc_bus_get(struct mmc_host *host)
{
	unsigned long flags;

	spin_lock_irqsave(&host->lock, flags);
	host->bus_refs++;
	spin_unlock_irqrestore(&host->lock, flags);
}


Contributors
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Adrian Bunk41100.00%1100.00%


Total41100.00%1100.00%



/*
 * Decrease reference count of bus operator and free it if
 * it is the last reference.
 */



static inline void mmc_bus_put(struct mmc_host *host)
{
	unsigned long flags;

	spin_lock_irqsave(&host->lock, flags);
	host->bus_refs--;
	if ((host->bus_refs == 0) && host->bus_ops)
		__mmc_release_bus(host);
	spin_unlock_irqrestore(&host->lock, flags);
}


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Adrian Bunk60100.00%1100.00%


Total60100.00%1100.00%



/*
 * Assign a mmc bus handler to a host. Only one bus handler may control a
 * host at any given time.
 */



void mmc_attach_bus(struct mmc_host *host, const struct mmc_bus_ops *ops)
{
	unsigned long flags;

	WARN_ON(!host->claimed);

	spin_lock_irqsave(&host->lock, flags);

	WARN_ON(host->bus_ops);
	WARN_ON(host->bus_refs);

	host->bus_ops = ops;
	host->bus_refs = 1;
	host->bus_dead = 0;

	spin_unlock_irqrestore(&host->lock, flags);
}


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Pierre Ossman6581.25%350.00%


Russell King1215.00%116.67%


Shawn Lin22.50%116.67%


Philip Langdale11.25%116.67%


Total80100.00%6100.00%



/*
 * Remove the current bus handler from a host.
 */



void mmc_detach_bus(struct mmc_host *host)
{
	unsigned long flags;

	WARN_ON(!host->claimed);
	WARN_ON(!host->bus_ops);

	spin_lock_irqsave(&host->lock, flags);

	host->bus_dead = 1;

	spin_unlock_irqrestore(&host->lock, flags);

	mmc_bus_put(host);
}


Contributors
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Pierre Ossman61100.00%3100.00%


Total61100.00%3100.00%






static void _mmc_detect_change(struct mmc_host *host, unsigned long delay,
				bool cd_irq)
{
#ifdef CONFIG_MMC_DEBUG
	unsigned long flags;
	spin_lock_irqsave(&host->lock, flags);
	WARN_ON(host->removed);
	spin_unlock_irqrestore(&host->lock, flags);
#endif

	/*
         * If the device is configured as wakeup, we prevent a new sleep for
         * 5 s to give provision for user space to consume the event.
         */
	if (cd_irq && !(host->caps & MMC_CAP_NEEDS_POLL) &&
		device_can_wakeup(mmc_dev(host)))
		pm_wakeup_event(mmc_dev(host), 5000);

	host->detect_change = 1;
	mmc_schedule_delayed_work(&host->detect, delay);
}


Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson3736.27%111.11%


Pierre Ossman3534.31%444.44%


Richard Purdie1312.75%111.11%


Russell King98.82%111.11%


Adrian Hunter65.88%111.11%


Andrew Morton21.96%111.11%


Total102100.00%9100.00%



/**
 *      mmc_detect_change - process change of state on a MMC socket
 *      @host: host which changed state.
 *      @delay: optional delay to wait before detection (jiffies)
 *
 *      MMC drivers should call this when they detect a card has been
 *      inserted or removed. The MMC layer will confirm that any
 *      present card is still functional, and initialize any newly
 *      inserted.
 */



void mmc_detect_change(struct mmc_host *host, unsigned long delay)
{
	_mmc_detect_change(host, delay, true);
}

Contributors
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Ulf Hansson23100.00%1100.00%


Total23100.00%1100.00%




EXPORT_SYMBOL(mmc_detect_change);




void mmc_init_erase(struct mmc_card *card)
{
	unsigned int sz;

	if (is_power_of_2(card->erase_size))
		card->erase_shift = ffs(card->erase_size) - 1;
	else
		card->erase_shift = 0;

	/*
         * It is possible to erase an arbitrarily large area of an SD or MMC
         * card.  That is not desirable because it can take a long time
         * (minutes) potentially delaying more important I/O, and also the
         * timeout calculations become increasingly hugely over-estimated.
         * Consequently, 'pref_erase' is defined as a guide to limit erases
         * to that size and alignment.
         *
         * For SD cards that define Allocation Unit size, limit erases to one
         * Allocation Unit at a time.
         * For MMC, have a stab at ai good value and for modern cards it will
         * end up being 4MiB. Note that if the value is too small, it can end
         * up taking longer to erase. Also note, erase_size is already set to
         * High Capacity Erase Size if available when this function is called.
         */
	if (mmc_card_sd(card) && card->ssr.au) {
		card->pref_erase = card->ssr.au;
		card->erase_shift = ffs(card->ssr.au) - 1;
	} else if (card->erase_size) {
		sz = (card->csd.capacity << (card->csd.read_blkbits - 9)) >> 11;
		if (sz < 128)
			card->pref_erase = 512 * 1024 / 512;
		else if (sz < 512)
			card->pref_erase = 1024 * 1024 / 512;
		else if (sz < 1024)
			card->pref_erase = 2 * 1024 * 1024 / 512;
		else
			card->pref_erase = 4 * 1024 * 1024 / 512;
		if (card->pref_erase < card->erase_size)
			card->pref_erase = card->erase_size;
		else {
			sz = card->pref_erase % card->erase_size;
			if (sz)
				card->pref_erase += card->erase_size - sz;
		}
	} else
		card->pref_erase = 0;
}


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Adrian Hunter22295.69%133.33%


Chuanxiao Dong93.88%133.33%


Gwendal Grignou10.43%133.33%


Total232100.00%3100.00%






static unsigned int mmc_mmc_erase_timeout(struct mmc_card *card,
				          unsigned int arg, unsigned int qty)
{
	unsigned int erase_timeout;

	if (arg == MMC_DISCARD_ARG ||
	    (arg == MMC_TRIM_ARG && card->ext_csd.rev >= 6)) {
		erase_timeout = card->ext_csd.trim_timeout;
	} else if (card->ext_csd.erase_group_def & 1) {
		/* High Capacity Erase Group Size uses HC timeouts */
		if (arg == MMC_TRIM_ARG)
			erase_timeout = card->ext_csd.trim_timeout;
		else
			erase_timeout = card->ext_csd.hc_erase_timeout;
	} else {
		/* CSD Erase Group Size uses write timeout */
		unsigned int mult = (10 << card->csd.r2w_factor);
		unsigned int timeout_clks = card->csd.tacc_clks * mult;
		unsigned int timeout_us;

		/* Avoid overflow: e.g. tacc_ns=80000000 mult=1280 */
		if (card->csd.tacc_ns < 1000000)
			timeout_us = (card->csd.tacc_ns * mult) / 1000;
		else
			timeout_us = (card->csd.tacc_ns / 1000) * mult;

		/*
                 * ios.clock is only a target.  The real clock rate might be
                 * less but not that much less, so fudge it by multiplying by 2.
                 */
		timeout_clks <<= 1;
		timeout_us += (timeout_clks * 1000) /
			      (card->host->ios.clock / 1000);

		erase_timeout = timeout_us / 1000;

		/*
                 * Theoretically, the calculation could underflow so round up
                 * to 1ms in that case.
                 */
		if (!erase_timeout)
			erase_timeout = 1;
	}

	/* Multiplier for secure operations */
	if (arg & MMC_SECURE_ARGS) {
		if (arg == MMC_SECURE_ERASE_ARG)
			erase_timeout *= card->ext_csd.sec_erase_mult;
		else
			erase_timeout *= card->ext_csd.sec_trim_mult;
	}

	erase_timeout *= qty;

	/*
         * Ensure at least a 1 second timeout for SPI as per
         * 'mmc_set_data_timeout()'
         */
	if (mmc_host_is_spi(card->host) && erase_timeout < 1000)
		erase_timeout = 1000;

	return erase_timeout;
}


Contributors
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Adrian Hunter25496.58%250.00%


Andrei Warkentin51.90%125.00%


Ulf Hansson41.52%125.00%


Total263100.00%4100.00%






static unsigned int mmc_sd_erase_timeout(struct mmc_card *card,
					 unsigned int arg,
					 unsigned int qty)
{
	unsigned int erase_timeout;

	if (card->ssr.erase_timeout) {
		/* Erase timeout specified in SD Status Register (SSR) */
		erase_timeout = card->ssr.erase_timeout * qty +
				card->ssr.erase_offset;
	} else {
		/*
                 * Erase timeout not specified in SD Status Register (SSR) so
                 * use 250ms per write block.
                 */
		erase_timeout = 250 * qty;
	}

	/* Must not be less than 1 second */
	if (erase_timeout < 1000)
		erase_timeout = 1000;

	return erase_timeout;
}


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Adrian Hunter6586.67%150.00%


Andrei Warkentin1013.33%150.00%


Total75100.00%2100.00%






static unsigned int mmc_erase_timeout(struct mmc_card *card,
				      unsigned int arg,
				      unsigned int qty)
{
	if (mmc_card_sd(card))
		return mmc_sd_erase_timeout(card, arg, qty);
	else
		return mmc_mmc_erase_timeout(card, arg, qty);
}


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Adrian Hunter3981.25%150.00%


Andrei Warkentin918.75%150.00%


Total48100.00%2100.00%






static int mmc_do_erase(struct mmc_card *card, unsigned int from,
			unsigned int to, unsigned int arg)
{
	struct mmc_command cmd = {};
	unsigned int qty = 0, busy_timeout = 0;
	bool use_r1b_resp = false;
	unsigned long timeout;
	int err;

	mmc_retune_hold(card->host);

	/*
         * qty is used to calculate the erase timeout which depends on how many
         * erase groups (or allocation units in SD terminology) are affected.
         * We count erasing part of an erase group as one erase group.
         * For SD, the allocation units are always a power of 2.  For MMC, the
         * erase group size is almost certainly also power of 2, but it does not
         * seem to insist on that in the JEDEC standard, so we fall back to
         * division in that case.  SD may not specify an allocation unit size,
         * in which case the timeout is based on the number of write blocks.
         *
         * Note that the timeout for secure trim 2 will only be correct if the
         * number of erase groups specified is the same as the total of all
         * preceding secure trim 1 commands.  Since the power may have been
         * lost since the secure trim 1 commands occurred, it is generally
         * impossible to calculate the secure trim 2 timeout correctly.
         */
	if (card->erase_shift)
		qty += ((to >> card->erase_shift) -
			(from >> card->erase_shift)) + 1;
	else if (mmc_card_sd(card))
		qty += to - from + 1;
	else
		qty += ((to / card->erase_size) -
			(from / card->erase_size)) + 1;

	if (!mmc_card_blockaddr(card)) {
		from <<= 9;
		to <<= 9;
	}

	if (mmc_card_sd(card))
		cmd.opcode = SD_ERASE_WR_BLK_START;
	else
		cmd.opcode = MMC_ERASE_GROUP_START;
	cmd.arg = from;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	err = mmc_wait_for_cmd(card->host, &cmd, 0);
	if (err) {
		pr_err("mmc_erase: group start error %d, "
		       "status %#x\n", err, cmd.resp[0]);
		err = -EIO;
		goto out;
	}

	memset(&cmd, 0, sizeof(struct mmc_command));
	if (mmc_card_sd(card))
		cmd.opcode = SD_ERASE_WR_BLK_END;
	else
		cmd.opcode = MMC_ERASE_GROUP_END;
	cmd.arg = to;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	err = mmc_wait_for_cmd(card->host, &cmd, 0);
	if (err) {
		pr_err("mmc_erase: group end error %d, status %#x\n",
		       err, cmd.resp[0]);
		err = -EIO;
		goto out;
	}

	memset(&cmd, 0, sizeof(struct mmc_command));
	cmd.opcode = MMC_ERASE;
	cmd.arg = arg;
	busy_timeout = mmc_erase_timeout(card, arg, qty);
	/*
         * If the host controller supports busy signalling and the timeout for
         * the erase operation does not exceed the max_busy_timeout, we should
         * use R1B response. Or we need to prevent the host from doing hw busy
         * detection, which is done by converting to a R1 response instead.
         */
	if (card->host->max_busy_timeout &&
	    busy_timeout > card->host->max_busy_timeout) {
		cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	} else {
		cmd.flags = MMC_RSP_SPI_R1B | MMC_RSP_R1B | MMC_CMD_AC;
		cmd.busy_timeout = busy_timeout;
		use_r1b_resp = true;
	}

	err = mmc_wait_for_cmd(card->host, &cmd, 0);
	if (err) {
		pr_err("mmc_erase: erase error %d, status %#x\n",
		       err, cmd.resp[0]);
		err = -EIO;
		goto out;
	}

	if (mmc_host_is_spi(card->host))
		goto out;

	/*
         * In case of when R1B + MMC_CAP_WAIT_WHILE_BUSY is used, the polling
         * shall be avoided.
         */
	if ((card->host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
		goto out;

	timeout = jiffies + msecs_to_jiffies(busy_timeout);
	do {
		memset(&cmd, 0, sizeof(struct mmc_command));
		cmd.opcode = MMC_SEND_STATUS;
		cmd.arg = card->rca << 16;
		cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
		/* Do not retry else we can't see errors */
		err = mmc_wait_for_cmd(card->host, &cmd, 0);
		if (err || (cmd.resp[0] & 0xFDF92000)) {
			pr_err("error %d requesting status %#x\n",
				err, cmd.resp[0]);
			err = -EIO;
			goto out;
		}

		/* Timeout if the device never becomes ready for data and
                 * never leaves the program state.
                 */
		if (time_after(jiffies, timeout)) {
			pr_err("%s: Card stuck in programming state! %s\n",
				mmc_hostname(card->host), __func__);
			err =  -EIO;
			goto out;
		}

	} while (!(cmd.resp[0] & R1_READY_FOR_DATA) ||
		 (R1_CURRENT_STATE(cmd.resp[0]) == R1_STATE_PRG));
out:
	mmc_retune_release(card->host);
	return err;
}


Contributors
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Adrian Hunter52079.39%327.27%


Baolin Wang7611.60%19.09%


Trey Ramsay487.33%19.09%


Girish K.S40.61%19.09%


Andrei Warkentin30.46%19.09%


Ulf Hansson10.15%19.09%


Masahiro Yamada10.15%19.09%


Jaehoon Chung10.15%19.09%


Chris Ball10.15%19.09%


Total655100.00%11100.00%






static unsigned int mmc_align_erase_size(struct mmc_card *card,
					 unsigned int *from,
					 unsigned int *to,
					 unsigned int nr)
{
	unsigned int from_new = *from, nr_new = nr, rem;

	/*
         * When the 'card->erase_size' is power of 2, we can use round_up/down()
         * to align the erase size efficiently.
         */
	if (is_power_of_2(card->erase_size)) {
		unsigned int temp = from_new;

		from_new = round_up(temp, card->erase_size);
		rem = from_new - temp;

		if (nr_new > rem)
			nr_new -= rem;
		else
			return 0;

		nr_new = round_down(nr_new, card->erase_size);
	} else {
		rem = from_new % card->erase_size;
		if (rem) {
			rem = card->erase_size - rem;
			from_new += rem;
			if (nr_new > rem)
				nr_new -= rem;
			else
				return 0;
		}

		rem = nr_new % card->erase_size;
		if (rem)
			nr_new -= rem;
	}

	if (nr_new == 0)
		return 0;

	*to = from_new + nr_new;
	*from = from_new;

	return nr_new;
}


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Baolin Wang182100.00%2100.00%


Total182100.00%2100.00%



/**
 * mmc_erase - erase sectors.
 * @card: card to erase
 * @from: first sector to erase
 * @nr: number of sectors to erase
 * @arg: erase command argument (SD supports only %MMC_ERASE_ARG)
 *
 * Caller must claim host before calling this function.
 */



int mmc_erase(struct mmc_card *card, unsigned int from, unsigned int nr,
	      unsigned int arg)
{
	unsigned int rem, to = from + nr;
	int err;

	if (!(card->host->caps & MMC_CAP_ERASE) ||
	    !(card->csd.cmdclass & CCC_ERASE))
		return -EOPNOTSUPP;

	if (!card->erase_size)
		return -EOPNOTSUPP;

	if (mmc_card_sd(card) && arg != MMC_ERASE_ARG)
		return -EOPNOTSUPP;

	if ((arg & MMC_SECURE_ARGS) &&
	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN))
		return -EOPNOTSUPP;

	if ((arg & MMC_TRIM_ARGS) &&
	    !(card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN))
		return -EOPNOTSUPP;

	if (arg == MMC_SECURE_ERASE_ARG) {
		if (from % card->erase_size || nr % card->erase_size)
			return -EINVAL;
	}

	if (arg == MMC_ERASE_ARG)
		nr = mmc_align_erase_size(card, &from, &to, nr);

	if (nr == 0)
		return 0;

	if (to <= from)
		return -EINVAL;

	/* 'from' and 'to' are inclusive */
	to -= 1;

	/*
         * Special case where only one erase-group fits in the timeout budget:
         * If the region crosses an erase-group boundary on this particular
         * case, we will be trimming more than one erase-group which, does not
         * fit in the timeout budget of the controller, so we need to split it
         * and call mmc_do_erase() twice if necessary. This special case is
         * identified by the card->eg_boundary flag.
         */
	rem = card->erase_size - (from % card->erase_size);
	if ((arg & MMC_TRIM_ARGS) && (card->eg_boundary) && (nr > rem)) {
		err = mmc_do_erase(card, from, from + rem - 1, arg);
		from += rem;
		if ((err) || (to <= from))
			return err;
	}

	return mmc_do_erase(card, from, to, arg);
}

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Adrian Hunter20570.45%125.00%


David Jander5920.27%125.00%


Robin van der Gracht175.84%125.00%


Baolin Wang103.44%125.00%


Total291100.00%4100.00%




EXPORT_SYMBOL(mmc_erase);




int mmc_can_erase(struct mmc_card *card)
{
	if ((card->host->caps & MMC_CAP_ERASE) &&
	    (card->csd.cmdclass & CCC_ERASE) && card->erase_size)
		return 1;
	return 0;
}

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Adrian Hunter42100.00%1100.00%


Total42100.00%1100.00%




EXPORT_SYMBOL(mmc_can_erase);




int mmc_can_trim(struct mmc_card *card)
{
	if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_GB_CL_EN) &&
	    (!(card->quirks & MMC_QUIRK_TRIM_BROKEN)))
		return 1;
	return 0;
}

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Adrian Hunter2666.67%150.00%


Shawn Lin1333.33%150.00%


Total39100.00%2100.00%




EXPORT_SYMBOL(mmc_can_trim);




int mmc_can_discard(struct mmc_card *card)
{
	/*
         * As there's no way to detect the discard support bit at v4.5
         * use the s/w feature support filed.
         */
	if (card->ext_csd.feature_support & MMC_DISCARD_FEATURE)
		return 1;
	return 0;
}

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Kyungmin Park27100.00%1100.00%


Total27100.00%1100.00%




EXPORT_SYMBOL(mmc_can_discard);




int mmc_can_sanitize(struct mmc_card *card)
{
	if (!mmc_can_trim(card) && !mmc_can_erase(card))
		return 0;
	if (card->ext_csd.sec_feature_support & EXT_CSD_SEC_SANITIZE)
		return 1;
	return 0;
}

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Kyungmin Park2660.47%150.00%


Adrian Hunter1739.53%150.00%


Total43100.00%2100.00%




EXPORT_SYMBOL(mmc_can_sanitize);




int mmc_can_secure_erase_trim(struct mmc_card *card)
{
	if ((card->ext_csd.sec_feature_support & EXT_CSD_SEC_ER_EN) &&
	    !(card->quirks & MMC_QUIRK_SEC_ERASE_TRIM_BROKEN))
		return 1;
	return 0;
}

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Adrian Hunter2670.27%150.00%


Lukas Czerner1129.73%150.00%


Total37100.00%2100.00%




EXPORT_SYMBOL(mmc_can_secure_erase_trim);




int mmc_erase_group_aligned(struct mmc_card *card, unsigned int from,
			    unsigned int nr)
{
	if (!card->erase_size)
		return 0;
	if (from % card->erase_size || nr % card->erase_size)
		return 0;
	return 1;
}

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Total48100.00%1100.00%




EXPORT_SYMBOL(mmc_erase_group_aligned);




static unsigned int mmc_do_calc_max_discard(struct mmc_card *card,
					    unsigned int arg)
{
	struct mmc_host *host = card->host;
	unsigned int max_discard, x, y, qty = 0, max_qty, min_qty, timeout;
	unsigned int last_timeout = 0;
	unsigned int max_busy_timeout = host->max_busy_timeout ?
			host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS;

	if (card->erase_shift) {
		max_qty = UINT_MAX >> card->erase_shift;
		min_qty = card->pref_erase >> card->erase_shift;
	} else if (mmc_card_sd(card)) {
		max_qty = UINT_MAX;
		min_qty = card->pref_erase;
	} else {
		max_qty = UINT_MAX / card->erase_size;
		min_qty = card->pref_erase / card->erase_size;
	}

	/*
         * We should not only use 'host->max_busy_timeout' as the limitation
         * when deciding the max discard sectors. We should set a balance value
         * to improve the erase speed, and it can not get too long timeout at
         * the same time.
         *
         * Here we set 'card->pref_erase' as the minimal discard sectors no
         * matter what size of 'host->max_busy_timeout', but if the
         * 'host->max_busy_timeout' is large enough for more discard sectors,
         * then we can continue to increase the max discard sectors until we
         * get a balance value. In cases when the 'host->max_busy_timeout'
         * isn't specified, use the default max erase timeout.
         */
	do {
		y = 0;
		for (x = 1; x && x <= max_qty && max_qty - x >= qty; x <<= 1) {
			timeout = mmc_erase_timeout(card, arg, qty + x);

			if (qty + x > min_qty && timeout > max_busy_timeout)
				break;

			if (timeout < last_timeout)
				break;
			last_timeout = timeout;
			y = x;
		}
		qty += y;
	} while (y);

	if (!qty)
		return 0;

	/*
         * When specifying a sector range to trim, chances are we might cross
         * an erase-group boundary even if the amount of sectors is less than
         * one erase-group.
         * If we can only fit one erase-group in the controller timeout budget,
         * we have to care that erase-group boundaries are not crossed by a
         * single trim operation. We flag that special case with "eg_boundary".
         * In all other cases we can just decrement qty and pretend that we
         * always touch (qty + 1) erase-groups as a simple optimization.
         */
	if (qty == 1)
		card->eg_boundary = 1;
	else
		qty--;

	/* Convert qty to sectors */
	if (card->erase_shift)
		max_discard = qty << card->erase_shift;
	else if (mmc_card_sd(card))
		max_discard = qty + 1;
	else
		max_discard = qty * card->erase_size;

	return max_discard;
}


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Adrian Hunter21075.54%120.00%


Baolin Wang4014.39%120.00%


Ulf Hansson165.76%240.00%


David Jander124.32%120.00%


Total278100.00%5100.00%






unsigned int mmc_calc_max_discard(struct mmc_card *card)
{
	struct mmc_host *host = card->host;
	unsigned int max_discard, max_trim;

	/*
         * Without erase_group_def set, MMC erase timeout depends on clock
         * frequence which can change.  In that case, the best choice is
         * just the preferred erase size.
         */
	if (mmc_card_mmc(card) && !(card->ext_csd.erase_group_def & 1))
		return card->pref_erase;

	max_discard = mmc_do_calc_max_discard(card, MMC_ERASE_ARG);
	if (mmc_can_trim(card)) {
		max_trim = mmc_do_calc_max_discard(card, MMC_TRIM_ARG);
		if (max_trim < max_discard)
			max_discard = max_trim;
	} else if (max_discard < card->erase_size) {
		max_discard = 0;
	}
	pr_debug("%s: calculated max. discard sectors %u for timeout %u ms\n",
		mmc_hostname(host), max_discard, host->max_busy_timeout ?
		host->max_busy_timeout : MMC_ERASE_TIMEOUT_MS);
	return max_discard;
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter12094.49%133.33%


Ulf Hansson75.51%266.67%


Total127100.00%3100.00%




EXPORT_SYMBOL(mmc_calc_max_discard);




int mmc_set_blocklen(struct mmc_card *card, unsigned int blocklen)
{
	struct mmc_command cmd = {};

	if (mmc_card_blockaddr(card) || mmc_card_ddr52(card) ||
	    mmc_card_hs400(card) || mmc_card_hs400es(card))
		return 0;

	cmd.opcode = MMC_SET_BLOCKLEN;
	cmd.arg = blocklen;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	return mmc_wait_for_cmd(card->host, &cmd, 5);
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter6783.75%120.00%


Ziyuan Xu1012.50%120.00%


Chris Ball11.25%120.00%


Seungwon Jeon11.25%120.00%


Masahiro Yamada11.25%120.00%


Total80100.00%5100.00%




EXPORT_SYMBOL(mmc_set_blocklen);




int mmc_set_blockcount(struct mmc_card *card, unsigned int blockcount,
			bool is_rel_write)
{
	struct mmc_command cmd = {};

	cmd.opcode = MMC_SET_BLOCK_COUNT;
	cmd.arg = blockcount & 0x0000FFFF;
	if (is_rel_write)
		cmd.arg |= 1 << 31;
	cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_AC;
	return mmc_wait_for_cmd(card->host, &cmd, 5);
}

Contributors
PersonTokensPropCommitsCommitProp
Loic Pallardy7198.61%150.00%


Masahiro Yamada11.39%150.00%


Total72100.00%2100.00%




EXPORT_SYMBOL(mmc_set_blockcount);




static void mmc_hw_reset_for_init(struct mmc_host *host)
{
	if (!(host->caps & MMC_CAP_HW_RESET) || !host->ops->hw_reset)
		return;
	host->ops->hw_reset(host);
}


Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter39100.00%1100.00%


Total39100.00%1100.00%






int mmc_hw_reset(struct mmc_host *host)
{
	int ret;

	if (!host->card)
		return -EINVAL;

	mmc_bus_get(host);
	if (!host->bus_ops || host->bus_dead || !host->bus_ops->reset) {
		mmc_bus_put(host);
		return -EOPNOTSUPP;
	}

	ret = host->bus_ops->reset(host);
	mmc_bus_put(host);

	if (ret)
		pr_warn("%s: tried to reset card, got error %d\n",
			mmc_hostname(host), ret);

	return ret;
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter5660.22%240.00%


Johan Rudholm3436.56%240.00%


Gwendal Grignou33.23%120.00%


Total93100.00%5100.00%




EXPORT_SYMBOL(mmc_hw_reset);




static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
{
	host->f_init = freq;

#ifdef CONFIG_MMC_DEBUG
	pr_info("%s: %s: trying to init card at %u Hz\n",
		mmc_hostname(host), __func__, host->f_init);
#endif
	mmc_power_up(host, host->ocr_avail);

	/*
         * Some eMMCs (with VCCQ always on) may not be reset after power up, so
         * do a hardware reset if possible.
         */
	mmc_hw_reset_for_init(host);

	/*
         * sdio_reset sends CMD52 to reset card.  Since we do not know
         * if the card is being re-initialized, just send it.  CMD52
         * should be ignored by SD/eMMC cards.
         * Skip it if we already know that we do not support SDIO commands
         */
	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
		sdio_reset(host);

	mmc_go_idle(host);

	if (!(host->caps2 & MMC_CAP2_NO_SD))
		mmc_send_if_cond(host, host->ocr_avail);

	/* Order's important: probe SDIO, then SD, then MMC */
	if (!(host->caps2 & MMC_CAP2_NO_SDIO))
		if (!mmc_attach_sdio(host))
			return 0;

	if (!(host->caps2 & MMC_CAP2_NO_SD))
		if (!mmc_attach_sd(host))
			return 0;

	if (!(host->caps2 & MMC_CAP2_NO_MMC))
		if (!mmc_attach_mmc(host))
			return 0;

	mmc_power_off(host);
	return -EIO;
}


Contributors
PersonTokensPropCommitsCommitProp
Andy Ross10862.07%116.67%


Ulf Hansson2614.94%233.33%


Carlo Caione2313.22%116.67%


Shawn Lin116.32%116.67%


Adrian Hunter63.45%116.67%


Total174100.00%6100.00%






int _mmc_detect_card_removed(struct mmc_host *host)
{
	int ret;

	if (!host->card || mmc_card_removed(host->card))
		return 1;

	ret = host->bus_ops->alive(host);

	/*
         * Card detect status and alive check may be out of sync if card is
         * removed slowly, when card detect switch changes while card/slot
         * pads are still contacted in hardware (refer to "SD Card Mechanical
         * Addendum, Appendix C: Card Detection Switch"). So reschedule a
         * detect work 200ms later for this case.
         */
	if (!ret && host->ops->get_cd && !host->ops->get_cd(host)) {
		mmc_detect_change(host, msecs_to_jiffies(200));
		pr_debug("%s: card removed too slowly\n", mmc_hostname(host));
	}

	if (ret) {
		mmc_card_set_removed(host->card);
		pr_debug("%s: card remove detected\n", mmc_hostname(host));
	}

	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter6760.36%150.00%


Kevin Liu4439.64%150.00%


Total111100.00%2100.00%






int mmc_detect_card_removed(struct mmc_host *host)
{
	struct mmc_card *card = host->card;
	int ret;

	WARN_ON(!host->claimed);

	if (!card)
		return 1;

	if (!mmc_card_is_removable(host))
		return 0;

	ret = mmc_card_removed(card);
	/*
         * The card will be considered unchanged unless we have been asked to
         * detect a change or host requires polling to provide card detection.
         */
	if (!host->detect_change && !(host->caps & MMC_CAP_NEEDS_POLL))
		return ret;

	host->detect_change = 0;
	if (!ret) {
		ret = _mmc_detect_card_removed(host);
		if (ret && (host->caps & MMC_CAP_NEEDS_POLL)) {
			/*
                         * Schedule a detect work as soon as possible to let a
                         * rescan handle the card removal.
                         */
			cancel_delayed_work(&host->detect);
			_mmc_detect_change(host, 0, false);
		}
	}

	return ret;
}

Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson7053.44%466.67%


Adrian Hunter5743.51%116.67%


Jaehoon Chung43.05%116.67%


Total131100.00%6100.00%




EXPORT_SYMBOL(mmc_detect_card_removed);




void mmc_rescan(struct work_struct *work)
{
	struct mmc_host *host =
		container_of(work, struct mmc_host, detect.work);
	int i;

	if (host->rescan_disable)
		return;

	/* If there is a non-removable card registered, only scan once */
	if (!mmc_card_is_removable(host) && host->rescan_entered)
		return;
	host->rescan_entered = 1;

	if (host->trigger_card_event && host->ops->card_event) {
		mmc_claim_host(host);
		host->ops->card_event(host);
		mmc_release_host(host);
		host->trigger_card_event = false;
	}

	mmc_bus_get(host);

	/*
         * if there is a _removable_ card registered, check whether it is
         * still present
         */
	if (host->bus_ops && !host->bus_dead && mmc_card_is_removable(host))
		host->bus_ops->detect(host);

	host->detect_change = 0;

	/*
         * Let mmc_bus_put() free the bus/bus_ops if we've found that
         * the card is no longer present.
         */
	mmc_bus_put(host);
	mmc_bus_get(host);

	/* if there still is a card present, stop here */
	if (host->bus_ops != NULL) {
		mmc_bus_put(host);
		goto out;
	}

	/*
         * Only we can add a new handler, so it's safe to
         * release the lock here.
         */
	mmc_bus_put(host);

	mmc_claim_host(host);
	if (mmc_card_is_removable(host) && host->ops->get_cd &&
			host->ops->get_cd(host) == 0) {
		mmc_power_off(host);
		mmc_release_host(host);
		goto out;
	}

	for (i = 0; i < ARRAY_SIZE(freqs); i++) {
		if (!mmc_rescan_try_freq(host, max(freqs[i], host->f_min)))
			break;
		if (freqs[i] <= host->f_min)
			break;
	}
	mmc_release_host(host);

 out:
	if (host->caps & MMC_CAP_NEEDS_POLL)
		mmc_schedule_delayed_work(&host->detect, HZ);
}


Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson5619.38%314.29%


Jorg Schummer4214.53%14.76%


Anton Vorontsov4214.53%14.76%


Hein Tibosch3913.49%14.76%


Russell King269.00%14.76%


Johan Rudholm165.54%14.76%


David Howells144.84%14.76%


Andy Ross124.15%14.76%


Jaehoon Chung113.81%29.52%


Pierre Ossman103.46%314.29%


Maxim Levitsky72.42%14.76%


Adrian Hunter62.08%14.76%


Ohad Ben-Cohen31.04%14.76%


Sascha Hauer20.69%14.76%


Timo Teräs20.69%14.76%


Chris Ball10.35%14.76%


Total289100.00%21100.00%






void mmc_start_host(struct mmc_host *host)
{
	host->f_init = max(freqs[0], host->f_min);
	host->rescan_disable = 0;
	host->ios.power_mode = MMC_POWER_UNDEFINED;

	if (!(host->caps2 & MMC_CAP2_NO_PRESCAN_POWERUP)) {
		mmc_claim_host(host);
		mmc_power_up(host, host->ocr_avail);
		mmc_release_host(host);
	}

	mmc_gpiod_request_cd_irq(host);
	_mmc_detect_change(host, 0, false);
}


Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson3540.70%535.71%


Adrian Hunter1719.77%321.43%


Russell King1618.60%214.29%


Roger Tseng89.30%17.14%


Guennadi Liakhovetski66.98%17.14%


Pierre Ossman22.33%17.14%


Richard Purdie22.33%17.14%


Total86100.00%14100.00%






void mmc_stop_host(struct mmc_host *host)
{
#ifdef CONFIG_MMC_DEBUG
	unsigned long flags;
	spin_lock_irqsave(&host->lock, flags);
	host->removed = 1;
	spin_unlock_irqrestore(&host->lock, flags);
#endif
	if (host->slot.cd_irq >= 0)
		disable_irq(host->slot.cd_irq);

	host->rescan_disable = 1;
	cancel_delayed_work_sync(&host->detect);

	/* clear pm flags now and let card drivers set them as needed */
	host->pm_flags = 0;

	mmc_bus_get(host);
	if (host->bus_ops && !host->bus_dead) {
		/* Calling bus_ops->remove() with a claimed host can deadlock */
		host->bus_ops->remove(host);
		mmc_claim_host(host);
		mmc_detach_bus(host);
		mmc_power_off(host);
		mmc_release_host(host);
		mmc_bus_put(host);
		return;
	}
	mmc_bus_put(host);

	mmc_claim_host(host);
	mmc_power_off(host);
	mmc_release_host(host);
}


Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman8150.94%533.33%


Adrian Hunter1911.95%16.67%


Russell King1610.06%16.67%


Ulf Hansson159.43%213.33%


Guennadi Liakhovetski85.03%320.00%


Nico Pitre74.40%16.67%


Jorg Schummer74.40%16.67%


Denis Karpov63.77%16.67%


Total159100.00%15100.00%






int mmc_power_save_host(struct mmc_host *host)
{
	int ret = 0;

#ifdef CONFIG_MMC_DEBUG
	pr_info("%s: %s: powering down\n", mmc_hostname(host), __func__);
#endif

	mmc_bus_get(host);

	if (!host->bus_ops || host->bus_dead) {
		mmc_bus_put(host);
		return -EINVAL;
	}

	if (host->bus_ops->power_save)
		ret = host->bus_ops->power_save(host);

	mmc_bus_put(host);

	mmc_power_off(host);

	return ret;
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter5964.84%133.33%


Daniel Drake1718.68%133.33%


Ohad Ben-Cohen1516.48%133.33%


Total91100.00%3100.00%




EXPORT_SYMBOL(mmc_power_save_host);




int mmc_power_restore_host(struct mmc_host *host)
{
	int ret;

#ifdef CONFIG_MMC_DEBUG
	pr_info("%s: %s: powering up\n", mmc_hostname(host), __func__);
#endif

	mmc_bus_get(host);

	if (!host->bus_ops || host->bus_dead) {
		mmc_bus_put(host);
		return -EINVAL;
	}

	mmc_power_up(host, host->card->ocr);
	ret = host->bus_ops->power_restore(host);

	mmc_bus_put(host);

	return ret;
}

Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter5158.62%120.00%


Daniel Drake1719.54%120.00%


Ohad Ben-Cohen1314.94%120.00%


Ulf Hansson66.90%240.00%


Total87100.00%5100.00%




EXPORT_SYMBOL(mmc_power_restore_host);

/*
 * Flush the cache to the non-volatile storage.
 */



int mmc_flush_cache(struct mmc_card *card)
{
	int err = 0;

	if (mmc_card_mmc(card) &&
			(card->ext_csd.cache_size > 0) &&
			(card->ext_csd.cache_ctrl & 1)) {
		err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
				EXT_CSD_FLUSH_CACHE, 1, 0);
		if (err)
			pr_err("%s: cache flush error %d\n",
					mmc_hostname(card->host), err);
	}

	return err;
}

Contributors
PersonTokensPropCommitsCommitProp
Seungwon Jeon80100.00%1100.00%


Total80100.00%1100.00%




EXPORT_SYMBOL(mmc_flush_cache);

#ifdef CONFIG_PM_SLEEP
/* Do the card removal on suspend if card is assumed removeable
 * Do that in pm notifier while userspace isn't yet frozen, so we will be able
   to sync the card.
*/



static int mmc_pm_notify(struct notifier_block *notify_block,
			unsigned long mode, void *unused)
{
	struct mmc_host *host = container_of(
		notify_block, struct mmc_host, pm_notify);
	unsigned long flags;
	int err = 0;

	switch (mode) {
	case PM_HIBERNATION_PREPARE:
	case PM_SUSPEND_PREPARE:
	case PM_RESTORE_PREPARE:
		spin_lock_irqsave(&host->lock, flags);
		host->rescan_disable = 1;
		spin_unlock_irqrestore(&host->lock, flags);
		cancel_delayed_work_sync(&host->detect);

		if (!host->bus_ops)
			break;

		/* Validate prerequisites for suspend */
		if (host->bus_ops->pre_suspend)
			err = host->bus_ops->pre_suspend(host);
		if (!err)
			break;

		/* Calling bus_ops->remove() with a claimed host can deadlock */
		host->bus_ops->remove(host);
		mmc_claim_host(host);
		mmc_detach_bus(host);
		mmc_power_off(host);
		mmc_release_host(host);
		host->pm_flags = 0;
		break;

	case PM_POST_SUSPEND:
	case PM_POST_HIBERNATION:
	case PM_POST_RESTORE:

		spin_lock_irqsave(&host->lock, flags);
		host->rescan_disable = 0;
		spin_unlock_irqrestore(&host->lock, flags);
		_mmc_detect_change(host, 0, false);

	}

	return 0;
}


Contributors
PersonTokensPropCommitsCommitProp
Maxim Levitsky12258.10%19.09%


Ulf Hansson4019.05%436.36%


Nico Pitre2411.43%19.09%


Pierre Ossman73.33%19.09%


Guennadi Liakhovetski62.86%19.09%


Russell King52.38%19.09%


Grygorii Strashko31.43%19.09%


Takashi Iwai31.43%19.09%


Total210100.00%11100.00%






void mmc_register_pm_notifier(struct mmc_host *host)
{
	host->pm_notify.notifier_call = mmc_pm_notify;
	register_pm_notifier(&host->pm_notify);
}


Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson26100.00%1100.00%


Total26100.00%1100.00%






void mmc_unregister_pm_notifier(struct mmc_host *host)
{
	unregister_pm_notifier(&host->pm_notify);
}

Contributors
PersonTokensPropCommitsCommitProp
Ulf Hansson18100.00%1100.00%


Total18100.00%1100.00%



#endif

/**
 * mmc_init_context_info() - init synchronization context
 * @host: mmc host
 *
 * Init struct context_info needed to implement asynchronous
 * request mechanism, used by mmc core, host driver and mmc requests
 * supplier.
 */



void mmc_init_context_info(struct mmc_host *host)
{
	host->context_info.is_new_req = false;
	host->context_info.is_done_rcv = false;
	host->context_info.is_waiting_last_req = false;
	init_waitqueue_head(&host->context_info.wait);
}


Contributors
PersonTokensPropCommitsCommitProp
Konstantin Dorfman44100.00%1100.00%


Total44100.00%1100.00%






static int __init mmc_init(void)
{
	int ret;

	ret = mmc_register_bus();
	if (ret)
		return ret;

	ret = mmc_register_host_class();
	if (ret)
		goto unregister_bus;

	ret = sdio_register_bus();
	if (ret)
		goto unregister_host_class;

	return 0;

unregister_host_class:
	mmc_unregister_host_class();
unregister_bus:
	mmc_unregister_bus();
	return ret;
}


Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman6195.31%266.67%


Ulf Hansson34.69%133.33%


Total64100.00%3100.00%






static void __exit mmc_exit(void)
{
	sdio_unregister_bus();
	mmc_unregister_host_class();
	mmc_unregister_bus();
}


Contributors
PersonTokensPropCommitsCommitProp
Pierre Ossman18100.00%2100.00%


Total18100.00%2100.00%




subsys_initcall(mmc_init);

module_exit(mmc_exit);

MODULE_LICENSE("GPL");

Overall Contributors
PersonTokensPropCommitsCommitProp
Adrian Hunter335329.72%2812.12%


Pierre Ossman124211.01%2812.12%


Ulf Hansson7326.49%3515.15%


Russell King6095.40%125.19%


Jaehoon Chung6025.34%62.60%


Johan Rudholm3933.48%73.03%


Per Forlin3743.32%20.87%


Baolin Wang3282.91%41.73%


Konstantin Dorfman2822.50%10.43%


Douglas Anderson2602.30%20.87%


David Brownell2302.04%31.30%


Anton Vorontsov2191.94%20.87%


Linus Walleij1851.64%62.60%


Haijun Zhang1601.42%10.43%


Maxim Levitsky1301.15%10.43%


Tim Kryger1291.14%20.87%


Adrian Bunk1281.13%20.87%


Andy Ross1201.06%10.43%


Guennadi Liakhovetski1110.98%41.73%


Arindam Nath1100.98%20.87%


Sascha Hauer1040.92%31.30%


Heiko Stübner980.87%10.43%


Seungwon Jeon920.82%31.30%


Andrew Gabbasov900.80%20.87%


Venkatraman Sathiyamoorthy870.77%20.87%


Shawn Lin820.73%41.73%


Loic Pallardy760.67%10.43%


David Jander710.63%10.43%


Hans de Goede700.62%10.43%


Kyungmin Park630.56%20.87%


Maya Erez610.54%10.43%


Wolfgang Mües550.49%10.43%


Trey Ramsay540.48%10.43%


Jorg Schummer490.43%20.87%


Kevin Liu440.39%10.43%


Javier Martinez Canillas440.39%10.43%


Hein Tibosch400.35%10.43%


Daniel Drake400.35%20.87%


Nico Pitre350.31%41.73%


Ohad Ben-Cohen340.30%31.30%


Andrei Warkentin270.24%10.43%


Stefan Nilsson XK260.23%10.43%


Carlo Caione230.20%10.43%


Robin van der Gracht170.15%10.43%


Chaotian Jing160.14%10.43%


Richard Purdie150.13%10.43%


Stefan Wahren150.13%10.43%


David Howells140.12%10.43%


Lukas Czerner110.10%10.43%


Jialing Fu100.09%10.43%


Ziyuan Xu100.09%10.43%


Pierre Tardy90.08%10.43%


Chuanxiao Dong90.08%10.43%


Philip Langdale90.08%10.43%


Roger Tseng80.07%10.43%


Mika Westerberg70.06%10.43%


Chris Ball60.05%41.73%


Aaron Lu60.05%10.43%


Denis Karpov60.05%10.43%


Masahiro Yamada50.04%10.43%


Girish K.S40.04%10.43%


Balaji Rao40.04%10.43%


Gwendal Grignou40.04%20.87%


Américo Wang30.03%10.43%


Takashi Iwai30.03%10.43%


Grygorii Strashko30.03%10.43%


Paul Walmsley20.02%10.43%


Ludovic Desroches20.02%10.43%


Srinivas Kandagatla20.02%10.43%


Andrew Morton20.02%10.43%


Wolfram Sang20.02%10.43%


Matt Gumbel20.02%10.43%


Timo Teräs20.02%10.43%


Akinobu Mita20.02%10.43%


José M. Fernández20.02%10.43%


Philip Rakity20.02%10.43%


Joe Perches20.02%10.43%


Alexey Skidanov10.01%10.43%


Mark Brown10.01%10.43%


Rusty Russell10.01%10.43%


Sujit Reddy Thumma10.01%10.43%


Total11282100.00%231100.00%


Directory: drivers/mmc/core



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