mirror of https://gitee.com/openkylin/linux.git
797 lines
18 KiB
C
797 lines
18 KiB
C
/*
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* linux/drivers/mmc/core/mmc_ops.h
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*
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* Copyright 2006-2007 Pierre Ossman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*/
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#include <linux/slab.h>
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#include <linux/export.h>
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#include <linux/types.h>
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#include <linux/scatterlist.h>
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#include <linux/mmc/host.h>
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#include <linux/mmc/card.h>
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#include <linux/mmc/mmc.h>
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#include "core.h"
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#include "host.h"
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#include "mmc_ops.h"
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#define MMC_OPS_TIMEOUT_MS (10 * 60 * 1000) /* 10 minute timeout */
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static const u8 tuning_blk_pattern_4bit[] = {
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0xff, 0x0f, 0xff, 0x00, 0xff, 0xcc, 0xc3, 0xcc,
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0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef,
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0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb,
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0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef,
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0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c,
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0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee,
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0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff,
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0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde,
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};
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static const u8 tuning_blk_pattern_8bit[] = {
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0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00, 0x00,
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0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc, 0xcc,
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0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff, 0xff,
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0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee, 0xff,
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0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd, 0xdd,
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0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff, 0xbb,
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0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff, 0xff,
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0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee, 0xff,
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0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
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0x00, 0xff, 0xff, 0xcc, 0xcc, 0xcc, 0x33, 0xcc,
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0xcc, 0xcc, 0x33, 0x33, 0xcc, 0xcc, 0xcc, 0xff,
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0xff, 0xff, 0xee, 0xff, 0xff, 0xff, 0xee, 0xee,
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0xff, 0xff, 0xff, 0xdd, 0xff, 0xff, 0xff, 0xdd,
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0xdd, 0xff, 0xff, 0xff, 0xbb, 0xff, 0xff, 0xff,
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0xbb, 0xbb, 0xff, 0xff, 0xff, 0x77, 0xff, 0xff,
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0xff, 0x77, 0x77, 0xff, 0x77, 0xbb, 0xdd, 0xee,
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};
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static inline int __mmc_send_status(struct mmc_card *card, u32 *status,
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bool ignore_crc)
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{
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int err;
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struct mmc_command cmd = {0};
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BUG_ON(!card);
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BUG_ON(!card->host);
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cmd.opcode = MMC_SEND_STATUS;
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if (!mmc_host_is_spi(card->host))
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cmd.arg = card->rca << 16;
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cmd.flags = MMC_RSP_SPI_R2 | MMC_RSP_R1 | MMC_CMD_AC;
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if (ignore_crc)
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cmd.flags &= ~MMC_RSP_CRC;
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err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
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if (err)
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return err;
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/* NOTE: callers are required to understand the difference
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* between "native" and SPI format status words!
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*/
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if (status)
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*status = cmd.resp[0];
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return 0;
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}
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int mmc_send_status(struct mmc_card *card, u32 *status)
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{
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return __mmc_send_status(card, status, false);
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}
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static int _mmc_select_card(struct mmc_host *host, struct mmc_card *card)
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{
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int err;
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struct mmc_command cmd = {0};
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BUG_ON(!host);
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cmd.opcode = MMC_SELECT_CARD;
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if (card) {
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cmd.arg = card->rca << 16;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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} else {
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cmd.arg = 0;
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cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
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}
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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return err;
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return 0;
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}
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int mmc_select_card(struct mmc_card *card)
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{
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BUG_ON(!card);
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return _mmc_select_card(card->host, card);
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}
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int mmc_deselect_cards(struct mmc_host *host)
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{
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return _mmc_select_card(host, NULL);
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}
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/*
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* Write the value specified in the device tree or board code into the optional
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* 16 bit Driver Stage Register. This can be used to tune raise/fall times and
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* drive strength of the DAT and CMD outputs. The actual meaning of a given
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* value is hardware dependant.
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* The presence of the DSR register can be determined from the CSD register,
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* bit 76.
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*/
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int mmc_set_dsr(struct mmc_host *host)
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{
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struct mmc_command cmd = {0};
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cmd.opcode = MMC_SET_DSR;
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cmd.arg = (host->dsr << 16) | 0xffff;
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cmd.flags = MMC_RSP_NONE | MMC_CMD_AC;
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return mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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}
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int mmc_go_idle(struct mmc_host *host)
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{
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int err;
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struct mmc_command cmd = {0};
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/*
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* Non-SPI hosts need to prevent chipselect going active during
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* GO_IDLE; that would put chips into SPI mode. Remind them of
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* that in case of hardware that won't pull up DAT3/nCS otherwise.
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*
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* SPI hosts ignore ios.chip_select; it's managed according to
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* rules that must accommodate non-MMC slaves which this layer
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* won't even know about.
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*/
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if (!mmc_host_is_spi(host)) {
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mmc_set_chip_select(host, MMC_CS_HIGH);
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mmc_delay(1);
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}
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cmd.opcode = MMC_GO_IDLE_STATE;
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cmd.arg = 0;
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cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_NONE | MMC_CMD_BC;
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err = mmc_wait_for_cmd(host, &cmd, 0);
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mmc_delay(1);
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if (!mmc_host_is_spi(host)) {
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mmc_set_chip_select(host, MMC_CS_DONTCARE);
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mmc_delay(1);
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}
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host->use_spi_crc = 0;
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return err;
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}
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int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr)
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{
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struct mmc_command cmd = {0};
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int i, err = 0;
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BUG_ON(!host);
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cmd.opcode = MMC_SEND_OP_COND;
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cmd.arg = mmc_host_is_spi(host) ? 0 : ocr;
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cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R3 | MMC_CMD_BCR;
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for (i = 100; i; i--) {
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err = mmc_wait_for_cmd(host, &cmd, 0);
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if (err)
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break;
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/* if we're just probing, do a single pass */
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if (ocr == 0)
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break;
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/* otherwise wait until reset completes */
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if (mmc_host_is_spi(host)) {
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if (!(cmd.resp[0] & R1_SPI_IDLE))
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break;
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} else {
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if (cmd.resp[0] & MMC_CARD_BUSY)
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break;
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}
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err = -ETIMEDOUT;
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mmc_delay(10);
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}
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if (rocr && !mmc_host_is_spi(host))
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*rocr = cmd.resp[0];
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return err;
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}
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int mmc_all_send_cid(struct mmc_host *host, u32 *cid)
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{
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int err;
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struct mmc_command cmd = {0};
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BUG_ON(!host);
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BUG_ON(!cid);
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cmd.opcode = MMC_ALL_SEND_CID;
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cmd.arg = 0;
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cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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return err;
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memcpy(cid, cmd.resp, sizeof(u32) * 4);
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return 0;
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}
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int mmc_set_relative_addr(struct mmc_card *card)
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{
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int err;
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struct mmc_command cmd = {0};
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BUG_ON(!card);
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BUG_ON(!card->host);
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cmd.opcode = MMC_SET_RELATIVE_ADDR;
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cmd.arg = card->rca << 16;
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cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(card->host, &cmd, MMC_CMD_RETRIES);
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if (err)
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return err;
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return 0;
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}
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static int
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mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode)
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{
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int err;
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struct mmc_command cmd = {0};
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BUG_ON(!host);
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BUG_ON(!cxd);
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cmd.opcode = opcode;
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cmd.arg = arg;
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cmd.flags = MMC_RSP_R2 | MMC_CMD_AC;
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err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
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if (err)
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return err;
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memcpy(cxd, cmd.resp, sizeof(u32) * 4);
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return 0;
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}
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/*
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* NOTE: void *buf, caller for the buf is required to use DMA-capable
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* buffer or on-stack buffer (with some overhead in callee).
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*/
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static int
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mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host,
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u32 opcode, void *buf, unsigned len)
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{
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struct mmc_request mrq = {NULL};
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struct mmc_command cmd = {0};
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struct mmc_data data = {0};
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struct scatterlist sg;
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mrq.cmd = &cmd;
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mrq.data = &data;
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cmd.opcode = opcode;
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cmd.arg = 0;
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/* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
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* rely on callers to never use this with "native" calls for reading
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* CSD or CID. Native versions of those commands use the R2 type,
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* not R1 plus a data block.
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*/
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cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
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data.blksz = len;
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data.blocks = 1;
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data.flags = MMC_DATA_READ;
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data.sg = &sg;
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data.sg_len = 1;
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sg_init_one(&sg, buf, len);
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if (opcode == MMC_SEND_CSD || opcode == MMC_SEND_CID) {
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/*
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* The spec states that CSR and CID accesses have a timeout
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* of 64 clock cycles.
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*/
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data.timeout_ns = 0;
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data.timeout_clks = 64;
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} else
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mmc_set_data_timeout(&data, card);
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mmc_wait_for_req(host, &mrq);
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if (cmd.error)
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return cmd.error;
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if (data.error)
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return data.error;
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return 0;
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}
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int mmc_send_csd(struct mmc_card *card, u32 *csd)
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{
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int ret, i;
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u32 *csd_tmp;
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if (!mmc_host_is_spi(card->host))
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return mmc_send_cxd_native(card->host, card->rca << 16,
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csd, MMC_SEND_CSD);
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csd_tmp = kzalloc(16, GFP_KERNEL);
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if (!csd_tmp)
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return -ENOMEM;
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ret = mmc_send_cxd_data(card, card->host, MMC_SEND_CSD, csd_tmp, 16);
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if (ret)
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goto err;
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for (i = 0;i < 4;i++)
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csd[i] = be32_to_cpu(csd_tmp[i]);
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err:
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kfree(csd_tmp);
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return ret;
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}
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int mmc_send_cid(struct mmc_host *host, u32 *cid)
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{
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int ret, i;
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u32 *cid_tmp;
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if (!mmc_host_is_spi(host)) {
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if (!host->card)
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return -EINVAL;
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return mmc_send_cxd_native(host, host->card->rca << 16,
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cid, MMC_SEND_CID);
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}
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cid_tmp = kzalloc(16, GFP_KERNEL);
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if (!cid_tmp)
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return -ENOMEM;
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ret = mmc_send_cxd_data(NULL, host, MMC_SEND_CID, cid_tmp, 16);
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if (ret)
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goto err;
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for (i = 0;i < 4;i++)
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cid[i] = be32_to_cpu(cid_tmp[i]);
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err:
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kfree(cid_tmp);
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return ret;
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}
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int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd)
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{
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int err;
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u8 *ext_csd;
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if (!card || !new_ext_csd)
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return -EINVAL;
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if (!mmc_can_ext_csd(card))
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return -EOPNOTSUPP;
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/*
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* As the ext_csd is so large and mostly unused, we don't store the
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* raw block in mmc_card.
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*/
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ext_csd = kzalloc(512, GFP_KERNEL);
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if (!ext_csd)
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return -ENOMEM;
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err = mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd,
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512);
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if (err)
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kfree(ext_csd);
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else
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*new_ext_csd = ext_csd;
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return err;
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}
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EXPORT_SYMBOL_GPL(mmc_get_ext_csd);
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int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp)
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{
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struct mmc_command cmd = {0};
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int err;
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cmd.opcode = MMC_SPI_READ_OCR;
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cmd.arg = highcap ? (1 << 30) : 0;
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cmd.flags = MMC_RSP_SPI_R3;
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err = mmc_wait_for_cmd(host, &cmd, 0);
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*ocrp = cmd.resp[1];
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return err;
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}
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int mmc_spi_set_crc(struct mmc_host *host, int use_crc)
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{
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struct mmc_command cmd = {0};
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int err;
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cmd.opcode = MMC_SPI_CRC_ON_OFF;
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cmd.flags = MMC_RSP_SPI_R1;
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cmd.arg = use_crc;
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err = mmc_wait_for_cmd(host, &cmd, 0);
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if (!err)
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host->use_spi_crc = use_crc;
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return err;
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}
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int mmc_switch_status_error(struct mmc_host *host, u32 status)
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{
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if (mmc_host_is_spi(host)) {
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if (status & R1_SPI_ILLEGAL_COMMAND)
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return -EBADMSG;
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} else {
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if (status & 0xFDFFA000)
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pr_warn("%s: unexpected status %#x after switch\n",
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mmc_hostname(host), status);
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if (status & R1_SWITCH_ERROR)
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return -EBADMSG;
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}
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return 0;
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}
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/**
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* __mmc_switch - modify EXT_CSD register
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* @card: the MMC card associated with the data transfer
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* @set: cmd set values
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* @index: EXT_CSD register index
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* @value: value to program into EXT_CSD register
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* @timeout_ms: timeout (ms) for operation performed by register write,
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* timeout of zero implies maximum possible timeout
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* @use_busy_signal: use the busy signal as response type
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* @send_status: send status cmd to poll for busy
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* @ignore_crc: ignore CRC errors when sending status cmd to poll for busy
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*
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* Modifies the EXT_CSD register for selected card.
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*/
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int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
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unsigned int timeout_ms, bool use_busy_signal, bool send_status,
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bool ignore_crc)
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{
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struct mmc_host *host = card->host;
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int err;
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struct mmc_command cmd = {0};
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unsigned long timeout;
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u32 status = 0;
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bool use_r1b_resp = use_busy_signal;
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mmc_retune_hold(host);
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/*
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* If the cmd timeout and the max_busy_timeout of the host are both
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* specified, let's validate them. A failure means we need to prevent
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* the host from doing hw busy detection, which is done by converting
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* to a R1 response instead of a R1B.
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*/
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if (timeout_ms && host->max_busy_timeout &&
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(timeout_ms > host->max_busy_timeout))
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use_r1b_resp = false;
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|
|
|
cmd.opcode = MMC_SWITCH;
|
|
cmd.arg = (MMC_SWITCH_MODE_WRITE_BYTE << 24) |
|
|
(index << 16) |
|
|
(value << 8) |
|
|
set;
|
|
cmd.flags = MMC_CMD_AC;
|
|
if (use_r1b_resp) {
|
|
cmd.flags |= MMC_RSP_SPI_R1B | MMC_RSP_R1B;
|
|
/*
|
|
* A busy_timeout of zero means the host can decide to use
|
|
* whatever value it finds suitable.
|
|
*/
|
|
cmd.busy_timeout = timeout_ms;
|
|
} else {
|
|
cmd.flags |= MMC_RSP_SPI_R1 | MMC_RSP_R1;
|
|
}
|
|
|
|
if (index == EXT_CSD_SANITIZE_START)
|
|
cmd.sanitize_busy = true;
|
|
|
|
err = mmc_wait_for_cmd(host, &cmd, MMC_CMD_RETRIES);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* No need to check card status in case of unblocking command */
|
|
if (!use_busy_signal)
|
|
goto out;
|
|
|
|
/*
|
|
* CRC errors shall only be ignored in cases were CMD13 is used to poll
|
|
* to detect busy completion.
|
|
*/
|
|
if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
|
|
ignore_crc = false;
|
|
|
|
/* We have an unspecified cmd timeout, use the fallback value. */
|
|
if (!timeout_ms)
|
|
timeout_ms = MMC_OPS_TIMEOUT_MS;
|
|
|
|
/* Must check status to be sure of no errors. */
|
|
timeout = jiffies + msecs_to_jiffies(timeout_ms);
|
|
do {
|
|
if (send_status) {
|
|
err = __mmc_send_status(card, &status, ignore_crc);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
if ((host->caps & MMC_CAP_WAIT_WHILE_BUSY) && use_r1b_resp)
|
|
break;
|
|
if (mmc_host_is_spi(host))
|
|
break;
|
|
|
|
/*
|
|
* We are not allowed to issue a status command and the host
|
|
* does'nt support MMC_CAP_WAIT_WHILE_BUSY, then we can only
|
|
* rely on waiting for the stated timeout to be sufficient.
|
|
*/
|
|
if (!send_status) {
|
|
mmc_delay(timeout_ms);
|
|
goto out;
|
|
}
|
|
|
|
/* Timeout if the device never leaves the program state. */
|
|
if (time_after(jiffies, timeout)) {
|
|
pr_err("%s: Card stuck in programming state! %s\n",
|
|
mmc_hostname(host), __func__);
|
|
err = -ETIMEDOUT;
|
|
goto out;
|
|
}
|
|
} while (R1_CURRENT_STATE(status) == R1_STATE_PRG);
|
|
|
|
err = mmc_switch_status_error(host, status);
|
|
out:
|
|
mmc_retune_release(host);
|
|
|
|
return err;
|
|
}
|
|
|
|
int mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
|
|
unsigned int timeout_ms)
|
|
{
|
|
return __mmc_switch(card, set, index, value, timeout_ms, true, true,
|
|
false);
|
|
}
|
|
EXPORT_SYMBOL_GPL(mmc_switch);
|
|
|
|
int mmc_send_tuning(struct mmc_host *host)
|
|
{
|
|
struct mmc_request mrq = {NULL};
|
|
struct mmc_command cmd = {0};
|
|
struct mmc_data data = {0};
|
|
struct scatterlist sg;
|
|
struct mmc_ios *ios = &host->ios;
|
|
const u8 *tuning_block_pattern;
|
|
int size, err = 0;
|
|
u8 *data_buf;
|
|
u32 opcode;
|
|
|
|
if (ios->bus_width == MMC_BUS_WIDTH_8) {
|
|
tuning_block_pattern = tuning_blk_pattern_8bit;
|
|
size = sizeof(tuning_blk_pattern_8bit);
|
|
opcode = MMC_SEND_TUNING_BLOCK_HS200;
|
|
} else if (ios->bus_width == MMC_BUS_WIDTH_4) {
|
|
tuning_block_pattern = tuning_blk_pattern_4bit;
|
|
size = sizeof(tuning_blk_pattern_4bit);
|
|
opcode = MMC_SEND_TUNING_BLOCK;
|
|
} else
|
|
return -EINVAL;
|
|
|
|
data_buf = kzalloc(size, GFP_KERNEL);
|
|
if (!data_buf)
|
|
return -ENOMEM;
|
|
|
|
mrq.cmd = &cmd;
|
|
mrq.data = &data;
|
|
|
|
cmd.opcode = opcode;
|
|
cmd.flags = MMC_RSP_R1 | MMC_CMD_ADTC;
|
|
|
|
data.blksz = size;
|
|
data.blocks = 1;
|
|
data.flags = MMC_DATA_READ;
|
|
|
|
/*
|
|
* According to the tuning specs, Tuning process
|
|
* is normally shorter 40 executions of CMD19,
|
|
* and timeout value should be shorter than 150 ms
|
|
*/
|
|
data.timeout_ns = 150 * NSEC_PER_MSEC;
|
|
|
|
data.sg = &sg;
|
|
data.sg_len = 1;
|
|
sg_init_one(&sg, data_buf, size);
|
|
|
|
mmc_wait_for_req(host, &mrq);
|
|
|
|
if (cmd.error) {
|
|
err = cmd.error;
|
|
goto out;
|
|
}
|
|
|
|
if (data.error) {
|
|
err = data.error;
|
|
goto out;
|
|
}
|
|
|
|
if (memcmp(data_buf, tuning_block_pattern, size))
|
|
err = -EIO;
|
|
|
|
out:
|
|
kfree(data_buf);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(mmc_send_tuning);
|
|
|
|
static int
|
|
mmc_send_bus_test(struct mmc_card *card, struct mmc_host *host, u8 opcode,
|
|
u8 len)
|
|
{
|
|
struct mmc_request mrq = {NULL};
|
|
struct mmc_command cmd = {0};
|
|
struct mmc_data data = {0};
|
|
struct scatterlist sg;
|
|
u8 *data_buf;
|
|
u8 *test_buf;
|
|
int i, err;
|
|
static u8 testdata_8bit[8] = { 0x55, 0xaa, 0, 0, 0, 0, 0, 0 };
|
|
static u8 testdata_4bit[4] = { 0x5a, 0, 0, 0 };
|
|
|
|
/* dma onto stack is unsafe/nonportable, but callers to this
|
|
* routine normally provide temporary on-stack buffers ...
|
|
*/
|
|
data_buf = kmalloc(len, GFP_KERNEL);
|
|
if (!data_buf)
|
|
return -ENOMEM;
|
|
|
|
if (len == 8)
|
|
test_buf = testdata_8bit;
|
|
else if (len == 4)
|
|
test_buf = testdata_4bit;
|
|
else {
|
|
pr_err("%s: Invalid bus_width %d\n",
|
|
mmc_hostname(host), len);
|
|
kfree(data_buf);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (opcode == MMC_BUS_TEST_W)
|
|
memcpy(data_buf, test_buf, len);
|
|
|
|
mrq.cmd = &cmd;
|
|
mrq.data = &data;
|
|
cmd.opcode = opcode;
|
|
cmd.arg = 0;
|
|
|
|
/* NOTE HACK: the MMC_RSP_SPI_R1 is always correct here, but we
|
|
* rely on callers to never use this with "native" calls for reading
|
|
* CSD or CID. Native versions of those commands use the R2 type,
|
|
* not R1 plus a data block.
|
|
*/
|
|
cmd.flags = MMC_RSP_SPI_R1 | MMC_RSP_R1 | MMC_CMD_ADTC;
|
|
|
|
data.blksz = len;
|
|
data.blocks = 1;
|
|
if (opcode == MMC_BUS_TEST_R)
|
|
data.flags = MMC_DATA_READ;
|
|
else
|
|
data.flags = MMC_DATA_WRITE;
|
|
|
|
data.sg = &sg;
|
|
data.sg_len = 1;
|
|
mmc_set_data_timeout(&data, card);
|
|
sg_init_one(&sg, data_buf, len);
|
|
mmc_wait_for_req(host, &mrq);
|
|
err = 0;
|
|
if (opcode == MMC_BUS_TEST_R) {
|
|
for (i = 0; i < len / 4; i++)
|
|
if ((test_buf[i] ^ data_buf[i]) != 0xff) {
|
|
err = -EIO;
|
|
break;
|
|
}
|
|
}
|
|
kfree(data_buf);
|
|
|
|
if (cmd.error)
|
|
return cmd.error;
|
|
if (data.error)
|
|
return data.error;
|
|
|
|
return err;
|
|
}
|
|
|
|
int mmc_bus_test(struct mmc_card *card, u8 bus_width)
|
|
{
|
|
int err, width;
|
|
|
|
if (bus_width == MMC_BUS_WIDTH_8)
|
|
width = 8;
|
|
else if (bus_width == MMC_BUS_WIDTH_4)
|
|
width = 4;
|
|
else if (bus_width == MMC_BUS_WIDTH_1)
|
|
return 0; /* no need for test */
|
|
else
|
|
return -EINVAL;
|
|
|
|
/*
|
|
* Ignore errors from BUS_TEST_W. BUS_TEST_R will fail if there
|
|
* is a problem. This improves chances that the test will work.
|
|
*/
|
|
mmc_send_bus_test(card, card->host, MMC_BUS_TEST_W, width);
|
|
err = mmc_send_bus_test(card, card->host, MMC_BUS_TEST_R, width);
|
|
return err;
|
|
}
|
|
|
|
int mmc_send_hpi_cmd(struct mmc_card *card, u32 *status)
|
|
{
|
|
struct mmc_command cmd = {0};
|
|
unsigned int opcode;
|
|
int err;
|
|
|
|
if (!card->ext_csd.hpi) {
|
|
pr_warn("%s: Card didn't support HPI command\n",
|
|
mmc_hostname(card->host));
|
|
return -EINVAL;
|
|
}
|
|
|
|
opcode = card->ext_csd.hpi_cmd;
|
|
if (opcode == MMC_STOP_TRANSMISSION)
|
|
cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
|
|
else if (opcode == MMC_SEND_STATUS)
|
|
cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
|
|
|
|
cmd.opcode = opcode;
|
|
cmd.arg = card->rca << 16 | 1;
|
|
|
|
err = mmc_wait_for_cmd(card->host, &cmd, 0);
|
|
if (err) {
|
|
pr_warn("%s: error %d interrupting operation. "
|
|
"HPI command response %#x\n", mmc_hostname(card->host),
|
|
err, cmd.resp[0]);
|
|
return err;
|
|
}
|
|
if (status)
|
|
*status = cmd.resp[0];
|
|
|
|
return 0;
|
|
}
|
|
|
|
int mmc_can_ext_csd(struct mmc_card *card)
|
|
{
|
|
return (card && card->csd.mmca_vsn > CSD_SPEC_VER_3);
|
|
}
|