forked from Minki/linux
4aaaf3ab15
The "powered_resume" in-parameter to mmc_sdio_init_card() has now become redundant as all callers set it to 0. Therefore let's just drop it. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Tested-by: Douglas Anderson <dianders@chromium.org>
1209 lines
27 KiB
C
1209 lines
27 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* linux/drivers/mmc/sdio.c
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*
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* Copyright 2006-2007 Pierre Ossman
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*/
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#include <linux/err.h>
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#include <linux/pm_runtime.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 <linux/mmc/sdio.h>
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#include <linux/mmc/sdio_func.h>
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#include <linux/mmc/sdio_ids.h>
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#include "core.h"
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#include "card.h"
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#include "host.h"
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#include "bus.h"
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#include "quirks.h"
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#include "sd.h"
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#include "sdio_bus.h"
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#include "mmc_ops.h"
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#include "sd_ops.h"
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#include "sdio_ops.h"
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#include "sdio_cis.h"
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static int sdio_read_fbr(struct sdio_func *func)
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{
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int ret;
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unsigned char data;
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if (mmc_card_nonstd_func_interface(func->card)) {
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func->class = SDIO_CLASS_NONE;
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return 0;
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}
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ret = mmc_io_rw_direct(func->card, 0, 0,
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SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF, 0, &data);
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if (ret)
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goto out;
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data &= 0x0f;
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if (data == 0x0f) {
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ret = mmc_io_rw_direct(func->card, 0, 0,
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SDIO_FBR_BASE(func->num) + SDIO_FBR_STD_IF_EXT, 0, &data);
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if (ret)
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goto out;
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}
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func->class = data;
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out:
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return ret;
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}
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static int sdio_init_func(struct mmc_card *card, unsigned int fn)
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{
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int ret;
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struct sdio_func *func;
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if (WARN_ON(fn > SDIO_MAX_FUNCS))
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return -EINVAL;
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func = sdio_alloc_func(card);
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if (IS_ERR(func))
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return PTR_ERR(func);
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func->num = fn;
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if (!(card->quirks & MMC_QUIRK_NONSTD_SDIO)) {
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ret = sdio_read_fbr(func);
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if (ret)
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goto fail;
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ret = sdio_read_func_cis(func);
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if (ret)
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goto fail;
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} else {
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func->vendor = func->card->cis.vendor;
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func->device = func->card->cis.device;
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func->max_blksize = func->card->cis.blksize;
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}
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card->sdio_func[fn - 1] = func;
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return 0;
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fail:
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/*
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* It is okay to remove the function here even though we hold
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* the host lock as we haven't registered the device yet.
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*/
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sdio_remove_func(func);
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return ret;
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}
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static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
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{
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int ret;
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int cccr_vsn;
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int uhs = ocr & R4_18V_PRESENT;
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unsigned char data;
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unsigned char speed;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CCCR, 0, &data);
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if (ret)
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goto out;
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cccr_vsn = data & 0x0f;
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if (cccr_vsn > SDIO_CCCR_REV_3_00) {
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pr_err("%s: unrecognised CCCR structure version %d\n",
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mmc_hostname(card->host), cccr_vsn);
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return -EINVAL;
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}
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card->cccr.sdio_vsn = (data & 0xf0) >> 4;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_CAPS, 0, &data);
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if (ret)
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goto out;
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if (data & SDIO_CCCR_CAP_SMB)
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card->cccr.multi_block = 1;
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if (data & SDIO_CCCR_CAP_LSC)
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card->cccr.low_speed = 1;
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if (data & SDIO_CCCR_CAP_4BLS)
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card->cccr.wide_bus = 1;
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if (cccr_vsn >= SDIO_CCCR_REV_1_10) {
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_POWER, 0, &data);
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if (ret)
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goto out;
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if (data & SDIO_POWER_SMPC)
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card->cccr.high_power = 1;
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}
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if (cccr_vsn >= SDIO_CCCR_REV_1_20) {
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
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if (ret)
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goto out;
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card->scr.sda_spec3 = 0;
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card->sw_caps.sd3_bus_mode = 0;
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card->sw_caps.sd3_drv_type = 0;
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if (cccr_vsn >= SDIO_CCCR_REV_3_00 && uhs) {
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card->scr.sda_spec3 = 1;
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ret = mmc_io_rw_direct(card, 0, 0,
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SDIO_CCCR_UHS, 0, &data);
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if (ret)
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goto out;
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if (mmc_host_uhs(card->host)) {
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if (data & SDIO_UHS_DDR50)
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card->sw_caps.sd3_bus_mode
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|= SD_MODE_UHS_DDR50;
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if (data & SDIO_UHS_SDR50)
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card->sw_caps.sd3_bus_mode
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|= SD_MODE_UHS_SDR50;
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if (data & SDIO_UHS_SDR104)
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card->sw_caps.sd3_bus_mode
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|= SD_MODE_UHS_SDR104;
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}
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ret = mmc_io_rw_direct(card, 0, 0,
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SDIO_CCCR_DRIVE_STRENGTH, 0, &data);
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if (ret)
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goto out;
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if (data & SDIO_DRIVE_SDTA)
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card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_A;
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if (data & SDIO_DRIVE_SDTC)
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card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_C;
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if (data & SDIO_DRIVE_SDTD)
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card->sw_caps.sd3_drv_type |= SD_DRIVER_TYPE_D;
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}
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/* if no uhs mode ensure we check for high speed */
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if (!card->sw_caps.sd3_bus_mode) {
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if (speed & SDIO_SPEED_SHS) {
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card->cccr.high_speed = 1;
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card->sw_caps.hs_max_dtr = 50000000;
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} else {
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card->cccr.high_speed = 0;
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card->sw_caps.hs_max_dtr = 25000000;
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}
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}
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}
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out:
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return ret;
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}
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static int sdio_enable_wide(struct mmc_card *card)
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{
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int ret;
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u8 ctrl;
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if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
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return 0;
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if (card->cccr.low_speed && !card->cccr.wide_bus)
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return 0;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
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if (ret)
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return ret;
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if ((ctrl & SDIO_BUS_WIDTH_MASK) == SDIO_BUS_WIDTH_RESERVED)
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pr_warn("%s: SDIO_CCCR_IF is invalid: 0x%02x\n",
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mmc_hostname(card->host), ctrl);
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/* set as 4-bit bus width */
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ctrl &= ~SDIO_BUS_WIDTH_MASK;
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ctrl |= SDIO_BUS_WIDTH_4BIT;
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ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
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if (ret)
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return ret;
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return 1;
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}
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/*
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* If desired, disconnect the pull-up resistor on CD/DAT[3] (pin 1)
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* of the card. This may be required on certain setups of boards,
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* controllers and embedded sdio device which do not need the card's
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* pull-up. As a result, card detection is disabled and power is saved.
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*/
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static int sdio_disable_cd(struct mmc_card *card)
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{
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int ret;
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u8 ctrl;
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if (!mmc_card_disable_cd(card))
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return 0;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
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if (ret)
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return ret;
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ctrl |= SDIO_BUS_CD_DISABLE;
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return mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
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}
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/*
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* Devices that remain active during a system suspend are
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* put back into 1-bit mode.
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*/
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static int sdio_disable_wide(struct mmc_card *card)
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{
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int ret;
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u8 ctrl;
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if (!(card->host->caps & MMC_CAP_4_BIT_DATA))
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return 0;
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if (card->cccr.low_speed && !card->cccr.wide_bus)
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return 0;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_IF, 0, &ctrl);
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if (ret)
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return ret;
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if (!(ctrl & SDIO_BUS_WIDTH_4BIT))
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return 0;
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ctrl &= ~SDIO_BUS_WIDTH_4BIT;
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ctrl |= SDIO_BUS_ASYNC_INT;
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ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_IF, ctrl, NULL);
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if (ret)
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return ret;
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mmc_set_bus_width(card->host, MMC_BUS_WIDTH_1);
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return 0;
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}
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static int sdio_enable_4bit_bus(struct mmc_card *card)
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{
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int err;
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if (card->type == MMC_TYPE_SDIO)
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err = sdio_enable_wide(card);
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else if ((card->host->caps & MMC_CAP_4_BIT_DATA) &&
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(card->scr.bus_widths & SD_SCR_BUS_WIDTH_4)) {
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err = mmc_app_set_bus_width(card, MMC_BUS_WIDTH_4);
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if (err)
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return err;
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err = sdio_enable_wide(card);
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if (err <= 0)
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mmc_app_set_bus_width(card, MMC_BUS_WIDTH_1);
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} else
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return 0;
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if (err > 0) {
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mmc_set_bus_width(card->host, MMC_BUS_WIDTH_4);
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err = 0;
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}
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return err;
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}
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/*
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* Test if the card supports high-speed mode and, if so, switch to it.
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*/
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static int mmc_sdio_switch_hs(struct mmc_card *card, int enable)
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{
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int ret;
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u8 speed;
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if (!(card->host->caps & MMC_CAP_SD_HIGHSPEED))
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return 0;
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if (!card->cccr.high_speed)
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return 0;
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ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
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if (ret)
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return ret;
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if (enable)
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speed |= SDIO_SPEED_EHS;
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else
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speed &= ~SDIO_SPEED_EHS;
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ret = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
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if (ret)
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return ret;
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return 1;
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}
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/*
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* Enable SDIO/combo card's high-speed mode. Return 0/1 if [not]supported.
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*/
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static int sdio_enable_hs(struct mmc_card *card)
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{
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int ret;
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ret = mmc_sdio_switch_hs(card, true);
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if (ret <= 0 || card->type == MMC_TYPE_SDIO)
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return ret;
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ret = mmc_sd_switch_hs(card);
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if (ret <= 0)
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mmc_sdio_switch_hs(card, false);
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return ret;
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}
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static unsigned mmc_sdio_get_max_clock(struct mmc_card *card)
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{
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unsigned max_dtr;
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if (mmc_card_hs(card)) {
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/*
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* The SDIO specification doesn't mention how
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* the CIS transfer speed register relates to
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* high-speed, but it seems that 50 MHz is
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* mandatory.
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*/
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max_dtr = 50000000;
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} else {
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max_dtr = card->cis.max_dtr;
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}
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if (card->type == MMC_TYPE_SD_COMBO)
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max_dtr = min(max_dtr, mmc_sd_get_max_clock(card));
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return max_dtr;
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}
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static unsigned char host_drive_to_sdio_drive(int host_strength)
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{
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switch (host_strength) {
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case MMC_SET_DRIVER_TYPE_A:
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return SDIO_DTSx_SET_TYPE_A;
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case MMC_SET_DRIVER_TYPE_B:
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return SDIO_DTSx_SET_TYPE_B;
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case MMC_SET_DRIVER_TYPE_C:
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return SDIO_DTSx_SET_TYPE_C;
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case MMC_SET_DRIVER_TYPE_D:
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return SDIO_DTSx_SET_TYPE_D;
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default:
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return SDIO_DTSx_SET_TYPE_B;
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}
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}
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static void sdio_select_driver_type(struct mmc_card *card)
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{
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int card_drv_type, drive_strength, drv_type;
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unsigned char card_strength;
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int err;
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card->drive_strength = 0;
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card_drv_type = card->sw_caps.sd3_drv_type | SD_DRIVER_TYPE_B;
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drive_strength = mmc_select_drive_strength(card,
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card->sw_caps.uhs_max_dtr,
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card_drv_type, &drv_type);
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if (drive_strength) {
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/* if error just use default for drive strength B */
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err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_DRIVE_STRENGTH, 0,
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&card_strength);
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if (err)
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return;
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card_strength &= ~(SDIO_DRIVE_DTSx_MASK<<SDIO_DRIVE_DTSx_SHIFT);
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card_strength |= host_drive_to_sdio_drive(drive_strength);
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/* if error default to drive strength B */
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err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_DRIVE_STRENGTH,
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card_strength, NULL);
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if (err)
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return;
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card->drive_strength = drive_strength;
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}
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if (drv_type)
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mmc_set_driver_type(card->host, drv_type);
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}
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|
|
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static int sdio_set_bus_speed_mode(struct mmc_card *card)
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{
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unsigned int bus_speed, timing;
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int err;
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unsigned char speed;
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unsigned int max_rate;
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/*
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* If the host doesn't support any of the UHS-I modes, fallback on
|
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* default speed.
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*/
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if (!mmc_host_uhs(card->host))
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return 0;
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bus_speed = SDIO_SPEED_SDR12;
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timing = MMC_TIMING_UHS_SDR12;
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if ((card->host->caps & MMC_CAP_UHS_SDR104) &&
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(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR104)) {
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bus_speed = SDIO_SPEED_SDR104;
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timing = MMC_TIMING_UHS_SDR104;
|
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card->sw_caps.uhs_max_dtr = UHS_SDR104_MAX_DTR;
|
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card->sd_bus_speed = UHS_SDR104_BUS_SPEED;
|
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} else if ((card->host->caps & MMC_CAP_UHS_DDR50) &&
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(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_DDR50)) {
|
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bus_speed = SDIO_SPEED_DDR50;
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timing = MMC_TIMING_UHS_DDR50;
|
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card->sw_caps.uhs_max_dtr = UHS_DDR50_MAX_DTR;
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card->sd_bus_speed = UHS_DDR50_BUS_SPEED;
|
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} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
|
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MMC_CAP_UHS_SDR50)) && (card->sw_caps.sd3_bus_mode &
|
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SD_MODE_UHS_SDR50)) {
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bus_speed = SDIO_SPEED_SDR50;
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timing = MMC_TIMING_UHS_SDR50;
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card->sw_caps.uhs_max_dtr = UHS_SDR50_MAX_DTR;
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card->sd_bus_speed = UHS_SDR50_BUS_SPEED;
|
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} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
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MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25)) &&
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(card->sw_caps.sd3_bus_mode & SD_MODE_UHS_SDR25)) {
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bus_speed = SDIO_SPEED_SDR25;
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timing = MMC_TIMING_UHS_SDR25;
|
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card->sw_caps.uhs_max_dtr = UHS_SDR25_MAX_DTR;
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card->sd_bus_speed = UHS_SDR25_BUS_SPEED;
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} else if ((card->host->caps & (MMC_CAP_UHS_SDR104 |
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MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR25 |
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MMC_CAP_UHS_SDR12)) && (card->sw_caps.sd3_bus_mode &
|
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SD_MODE_UHS_SDR12)) {
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bus_speed = SDIO_SPEED_SDR12;
|
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timing = MMC_TIMING_UHS_SDR12;
|
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card->sw_caps.uhs_max_dtr = UHS_SDR12_MAX_DTR;
|
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card->sd_bus_speed = UHS_SDR12_BUS_SPEED;
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}
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|
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err = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_SPEED, 0, &speed);
|
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if (err)
|
|
return err;
|
|
|
|
speed &= ~SDIO_SPEED_BSS_MASK;
|
|
speed |= bus_speed;
|
|
err = mmc_io_rw_direct(card, 1, 0, SDIO_CCCR_SPEED, speed, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
max_rate = min_not_zero(card->quirk_max_rate,
|
|
card->sw_caps.uhs_max_dtr);
|
|
|
|
if (bus_speed) {
|
|
mmc_set_timing(card->host, timing);
|
|
mmc_set_clock(card->host, max_rate);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* UHS-I specific initialization procedure
|
|
*/
|
|
static int mmc_sdio_init_uhs_card(struct mmc_card *card)
|
|
{
|
|
int err;
|
|
|
|
if (!card->scr.sda_spec3)
|
|
return 0;
|
|
|
|
/* Switch to wider bus */
|
|
err = sdio_enable_4bit_bus(card);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Set the driver strength for the card */
|
|
sdio_select_driver_type(card);
|
|
|
|
/* Set bus speed mode of the card */
|
|
err = sdio_set_bus_speed_mode(card);
|
|
if (err)
|
|
goto out;
|
|
|
|
/*
|
|
* SPI mode doesn't define CMD19 and tuning is only valid for SDR50 and
|
|
* SDR104 mode SD-cards. Note that tuning is mandatory for SDR104.
|
|
*/
|
|
if (!mmc_host_is_spi(card->host) &&
|
|
((card->host->ios.timing == MMC_TIMING_UHS_SDR50) ||
|
|
(card->host->ios.timing == MMC_TIMING_UHS_SDR104)))
|
|
err = mmc_execute_tuning(card);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void mmc_sdio_resend_if_cond(struct mmc_host *host,
|
|
struct mmc_card *card)
|
|
{
|
|
sdio_reset(host);
|
|
mmc_go_idle(host);
|
|
mmc_send_if_cond(host, host->ocr_avail);
|
|
mmc_remove_card(card);
|
|
}
|
|
|
|
/*
|
|
* Handle the detection and initialisation of a card.
|
|
*
|
|
* In the case of a resume, "oldcard" will contain the card
|
|
* we're trying to reinitialise.
|
|
*/
|
|
static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr,
|
|
struct mmc_card *oldcard)
|
|
{
|
|
struct mmc_card *card;
|
|
int err;
|
|
int retries = 10;
|
|
u32 rocr = 0;
|
|
u32 ocr_card = ocr;
|
|
|
|
WARN_ON(!host->claimed);
|
|
|
|
/* to query card if 1.8V signalling is supported */
|
|
if (mmc_host_uhs(host))
|
|
ocr |= R4_18V_PRESENT;
|
|
|
|
try_again:
|
|
if (!retries) {
|
|
pr_warn("%s: Skipping voltage switch\n", mmc_hostname(host));
|
|
ocr &= ~R4_18V_PRESENT;
|
|
}
|
|
|
|
/*
|
|
* Inform the card of the voltage
|
|
*/
|
|
err = mmc_send_io_op_cond(host, ocr, &rocr);
|
|
if (err)
|
|
goto err;
|
|
|
|
/*
|
|
* For SPI, enable CRC as appropriate.
|
|
*/
|
|
if (mmc_host_is_spi(host)) {
|
|
err = mmc_spi_set_crc(host, use_spi_crc);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Allocate card structure.
|
|
*/
|
|
card = mmc_alloc_card(host, NULL);
|
|
if (IS_ERR(card)) {
|
|
err = PTR_ERR(card);
|
|
goto err;
|
|
}
|
|
|
|
if ((rocr & R4_MEMORY_PRESENT) &&
|
|
mmc_sd_get_cid(host, ocr & rocr, card->raw_cid, NULL) == 0) {
|
|
card->type = MMC_TYPE_SD_COMBO;
|
|
|
|
if (oldcard && (oldcard->type != MMC_TYPE_SD_COMBO ||
|
|
memcmp(card->raw_cid, oldcard->raw_cid, sizeof(card->raw_cid)) != 0)) {
|
|
mmc_remove_card(card);
|
|
pr_debug("%s: Perhaps the card was replaced\n",
|
|
mmc_hostname(host));
|
|
return -ENOENT;
|
|
}
|
|
} else {
|
|
card->type = MMC_TYPE_SDIO;
|
|
|
|
if (oldcard && oldcard->type != MMC_TYPE_SDIO) {
|
|
mmc_remove_card(card);
|
|
pr_debug("%s: Perhaps the card was replaced\n",
|
|
mmc_hostname(host));
|
|
return -ENOENT;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Call the optional HC's init_card function to handle quirks.
|
|
*/
|
|
if (host->ops->init_card)
|
|
host->ops->init_card(host, card);
|
|
|
|
/*
|
|
* If the host and card support UHS-I mode request the card
|
|
* to switch to 1.8V signaling level. No 1.8v signalling if
|
|
* UHS mode is not enabled to maintain compatibility and some
|
|
* systems that claim 1.8v signalling in fact do not support
|
|
* it. Per SDIO spec v3, section 3.1.2, if the voltage is already
|
|
* 1.8v, the card sets S18A to 0 in the R4 response. So it will
|
|
* fails to check rocr & R4_18V_PRESENT, but we still need to
|
|
* try to init uhs card. sdio_read_cccr will take over this task
|
|
* to make sure which speed mode should work.
|
|
*/
|
|
if (rocr & ocr & R4_18V_PRESENT) {
|
|
err = mmc_set_uhs_voltage(host, ocr_card);
|
|
if (err == -EAGAIN) {
|
|
mmc_sdio_resend_if_cond(host, card);
|
|
retries--;
|
|
goto try_again;
|
|
} else if (err) {
|
|
ocr &= ~R4_18V_PRESENT;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* For native busses: set card RCA and quit open drain mode.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_send_relative_addr(host, &card->rca);
|
|
if (err)
|
|
goto remove;
|
|
|
|
/*
|
|
* Update oldcard with the new RCA received from the SDIO
|
|
* device -- we're doing this so that it's updated in the
|
|
* "card" struct when oldcard overwrites that later.
|
|
*/
|
|
if (oldcard)
|
|
oldcard->rca = card->rca;
|
|
}
|
|
|
|
/*
|
|
* Read CSD, before selecting the card
|
|
*/
|
|
if (!oldcard && card->type == MMC_TYPE_SD_COMBO) {
|
|
err = mmc_sd_get_csd(host, card);
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_decode_cid(card);
|
|
}
|
|
|
|
/*
|
|
* Select card, as all following commands rely on that.
|
|
*/
|
|
if (!mmc_host_is_spi(host)) {
|
|
err = mmc_select_card(card);
|
|
if (err)
|
|
goto remove;
|
|
}
|
|
|
|
if (card->quirks & MMC_QUIRK_NONSTD_SDIO) {
|
|
/*
|
|
* This is non-standard SDIO device, meaning it doesn't
|
|
* have any CIA (Common I/O area) registers present.
|
|
* It's host's responsibility to fill cccr and cis
|
|
* structures in init_card().
|
|
*/
|
|
mmc_set_clock(host, card->cis.max_dtr);
|
|
|
|
if (card->cccr.high_speed) {
|
|
mmc_set_timing(card->host, MMC_TIMING_SD_HS);
|
|
}
|
|
|
|
goto finish;
|
|
}
|
|
|
|
/*
|
|
* Read the common registers. Note that we should try to
|
|
* validate whether UHS would work or not.
|
|
*/
|
|
err = sdio_read_cccr(card, ocr);
|
|
if (err) {
|
|
mmc_sdio_resend_if_cond(host, card);
|
|
if (ocr & R4_18V_PRESENT) {
|
|
/* Retry init sequence, but without R4_18V_PRESENT. */
|
|
retries = 0;
|
|
goto try_again;
|
|
} else {
|
|
goto remove;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read the common CIS tuples.
|
|
*/
|
|
err = sdio_read_common_cis(card);
|
|
if (err)
|
|
goto remove;
|
|
|
|
if (oldcard) {
|
|
int same = (card->cis.vendor == oldcard->cis.vendor &&
|
|
card->cis.device == oldcard->cis.device);
|
|
mmc_remove_card(card);
|
|
if (!same) {
|
|
pr_debug("%s: Perhaps the card was replaced\n",
|
|
mmc_hostname(host));
|
|
return -ENOENT;
|
|
}
|
|
|
|
card = oldcard;
|
|
}
|
|
card->ocr = ocr_card;
|
|
mmc_fixup_device(card, sdio_fixup_methods);
|
|
|
|
if (card->type == MMC_TYPE_SD_COMBO) {
|
|
err = mmc_sd_setup_card(host, card, oldcard != NULL);
|
|
/* handle as SDIO-only card if memory init failed */
|
|
if (err) {
|
|
mmc_go_idle(host);
|
|
if (mmc_host_is_spi(host))
|
|
/* should not fail, as it worked previously */
|
|
mmc_spi_set_crc(host, use_spi_crc);
|
|
card->type = MMC_TYPE_SDIO;
|
|
} else
|
|
card->dev.type = &sd_type;
|
|
}
|
|
|
|
/*
|
|
* If needed, disconnect card detection pull-up resistor.
|
|
*/
|
|
err = sdio_disable_cd(card);
|
|
if (err)
|
|
goto remove;
|
|
|
|
/* Initialization sequence for UHS-I cards */
|
|
/* Only if card supports 1.8v and UHS signaling */
|
|
if ((ocr & R4_18V_PRESENT) && card->sw_caps.sd3_bus_mode) {
|
|
err = mmc_sdio_init_uhs_card(card);
|
|
if (err)
|
|
goto remove;
|
|
} else {
|
|
/*
|
|
* Switch to high-speed (if supported).
|
|
*/
|
|
err = sdio_enable_hs(card);
|
|
if (err > 0)
|
|
mmc_set_timing(card->host, MMC_TIMING_SD_HS);
|
|
else if (err)
|
|
goto remove;
|
|
|
|
/*
|
|
* Change to the card's maximum speed.
|
|
*/
|
|
mmc_set_clock(host, mmc_sdio_get_max_clock(card));
|
|
|
|
/*
|
|
* Switch to wider bus (if supported).
|
|
*/
|
|
err = sdio_enable_4bit_bus(card);
|
|
if (err)
|
|
goto remove;
|
|
}
|
|
|
|
if (host->caps2 & MMC_CAP2_AVOID_3_3V &&
|
|
host->ios.signal_voltage == MMC_SIGNAL_VOLTAGE_330) {
|
|
pr_err("%s: Host failed to negotiate down from 3.3V\n",
|
|
mmc_hostname(host));
|
|
err = -EINVAL;
|
|
goto remove;
|
|
}
|
|
finish:
|
|
if (!oldcard)
|
|
host->card = card;
|
|
return 0;
|
|
|
|
remove:
|
|
if (!oldcard)
|
|
mmc_remove_card(card);
|
|
|
|
err:
|
|
return err;
|
|
}
|
|
|
|
static int mmc_sdio_reinit_card(struct mmc_host *host)
|
|
{
|
|
int ret;
|
|
|
|
/*
|
|
* Reset the card by performing the same steps that are taken by
|
|
* mmc_rescan_try_freq() and mmc_attach_sdio() during a "normal" probe.
|
|
*
|
|
* sdio_reset() is technically not needed. Having just powered up the
|
|
* hardware, it should already be in reset state. However, some
|
|
* platforms (such as SD8686 on OLPC) do not instantly cut power,
|
|
* meaning that a reset is required when restoring power soon after
|
|
* powering off. It is harmless in other cases.
|
|
*
|
|
* The CMD5 reset (mmc_send_io_op_cond()), according to the SDIO spec,
|
|
* is not necessary for non-removable cards. However, it is required
|
|
* for OLPC SD8686 (which expects a [CMD5,5,3,7] init sequence), and
|
|
* harmless in other situations.
|
|
*
|
|
*/
|
|
|
|
sdio_reset(host);
|
|
mmc_go_idle(host);
|
|
mmc_send_if_cond(host, host->card->ocr);
|
|
|
|
ret = mmc_send_io_op_cond(host, 0, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return mmc_sdio_init_card(host, host->card->ocr, host->card);
|
|
}
|
|
|
|
/*
|
|
* Host is being removed. Free up the current card.
|
|
*/
|
|
static void mmc_sdio_remove(struct mmc_host *host)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0;i < host->card->sdio_funcs;i++) {
|
|
if (host->card->sdio_func[i]) {
|
|
sdio_remove_func(host->card->sdio_func[i]);
|
|
host->card->sdio_func[i] = NULL;
|
|
}
|
|
}
|
|
|
|
mmc_remove_card(host->card);
|
|
host->card = NULL;
|
|
}
|
|
|
|
/*
|
|
* Card detection - card is alive.
|
|
*/
|
|
static int mmc_sdio_alive(struct mmc_host *host)
|
|
{
|
|
return mmc_select_card(host->card);
|
|
}
|
|
|
|
/*
|
|
* Card detection callback from host.
|
|
*/
|
|
static void mmc_sdio_detect(struct mmc_host *host)
|
|
{
|
|
int err;
|
|
|
|
/* Make sure card is powered before detecting it */
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD) {
|
|
err = pm_runtime_get_sync(&host->card->dev);
|
|
if (err < 0) {
|
|
pm_runtime_put_noidle(&host->card->dev);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
mmc_claim_host(host);
|
|
|
|
/*
|
|
* Just check if our card has been removed.
|
|
*/
|
|
err = _mmc_detect_card_removed(host);
|
|
|
|
mmc_release_host(host);
|
|
|
|
/*
|
|
* Tell PM core it's OK to power off the card now.
|
|
*
|
|
* The _sync variant is used in order to ensure that the card
|
|
* is left powered off in case an error occurred, and the card
|
|
* is going to be removed.
|
|
*
|
|
* Since there is no specific reason to believe a new user
|
|
* is about to show up at this point, the _sync variant is
|
|
* desirable anyway.
|
|
*/
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD)
|
|
pm_runtime_put_sync(&host->card->dev);
|
|
|
|
out:
|
|
if (err) {
|
|
mmc_sdio_remove(host);
|
|
|
|
mmc_claim_host(host);
|
|
mmc_detach_bus(host);
|
|
mmc_power_off(host);
|
|
mmc_release_host(host);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* SDIO pre_suspend. We need to suspend all functions separately.
|
|
* Therefore all registered functions must have drivers with suspend
|
|
* and resume methods. Failing that we simply remove the whole card.
|
|
*/
|
|
static int mmc_sdio_pre_suspend(struct mmc_host *host)
|
|
{
|
|
int i, err = 0;
|
|
|
|
for (i = 0; i < host->card->sdio_funcs; i++) {
|
|
struct sdio_func *func = host->card->sdio_func[i];
|
|
if (func && sdio_func_present(func) && func->dev.driver) {
|
|
const struct dev_pm_ops *pmops = func->dev.driver->pm;
|
|
if (!pmops || !pmops->suspend || !pmops->resume) {
|
|
/* force removal of entire card in that case */
|
|
err = -ENOSYS;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* SDIO suspend. Suspend all functions separately.
|
|
*/
|
|
static int mmc_sdio_suspend(struct mmc_host *host)
|
|
{
|
|
/* Prevent processing of SDIO IRQs in suspended state. */
|
|
mmc_card_set_suspended(host->card);
|
|
cancel_delayed_work_sync(&host->sdio_irq_work);
|
|
|
|
mmc_claim_host(host);
|
|
|
|
if (mmc_card_keep_power(host) && mmc_card_wake_sdio_irq(host))
|
|
sdio_disable_wide(host->card);
|
|
|
|
if (!mmc_card_keep_power(host)) {
|
|
mmc_power_off(host);
|
|
} else if (host->retune_period) {
|
|
mmc_retune_timer_stop(host);
|
|
mmc_retune_needed(host);
|
|
}
|
|
|
|
mmc_release_host(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmc_sdio_resume(struct mmc_host *host)
|
|
{
|
|
int err = 0;
|
|
|
|
/* Basic card reinitialization. */
|
|
mmc_claim_host(host);
|
|
|
|
/*
|
|
* Restore power and reinitialize the card when needed. Note that a
|
|
* removable card is checked from a detect work later on in the resume
|
|
* process.
|
|
*/
|
|
if (!mmc_card_keep_power(host)) {
|
|
mmc_power_up(host, host->card->ocr);
|
|
/*
|
|
* Tell runtime PM core we just powered up the card,
|
|
* since it still believes the card is powered off.
|
|
* Note that currently runtime PM is only enabled
|
|
* for SDIO cards that are MMC_CAP_POWER_OFF_CARD
|
|
*/
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD) {
|
|
pm_runtime_disable(&host->card->dev);
|
|
pm_runtime_set_active(&host->card->dev);
|
|
pm_runtime_enable(&host->card->dev);
|
|
}
|
|
err = mmc_sdio_reinit_card(host);
|
|
} else if (mmc_card_wake_sdio_irq(host)) {
|
|
/* We may have switched to 1-bit mode during suspend */
|
|
err = sdio_enable_4bit_bus(host->card);
|
|
}
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Allow SDIO IRQs to be processed again. */
|
|
mmc_card_clr_suspended(host->card);
|
|
|
|
if (host->sdio_irqs) {
|
|
if (!(host->caps2 & MMC_CAP2_SDIO_IRQ_NOTHREAD))
|
|
wake_up_process(host->sdio_irq_thread);
|
|
else if (host->caps & MMC_CAP_SDIO_IRQ)
|
|
host->ops->enable_sdio_irq(host, 1);
|
|
}
|
|
|
|
out:
|
|
mmc_release_host(host);
|
|
|
|
host->pm_flags &= ~MMC_PM_KEEP_POWER;
|
|
return err;
|
|
}
|
|
|
|
static int mmc_sdio_runtime_suspend(struct mmc_host *host)
|
|
{
|
|
/* No references to the card, cut the power to it. */
|
|
mmc_claim_host(host);
|
|
mmc_power_off(host);
|
|
mmc_release_host(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mmc_sdio_runtime_resume(struct mmc_host *host)
|
|
{
|
|
int ret;
|
|
|
|
/* Restore power and re-initialize. */
|
|
mmc_claim_host(host);
|
|
mmc_power_up(host, host->card->ocr);
|
|
ret = mmc_sdio_reinit_card(host);
|
|
mmc_release_host(host);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int mmc_sdio_hw_reset(struct mmc_host *host)
|
|
{
|
|
mmc_power_cycle(host, host->card->ocr);
|
|
return mmc_sdio_reinit_card(host);
|
|
}
|
|
|
|
static int mmc_sdio_sw_reset(struct mmc_host *host)
|
|
{
|
|
mmc_set_clock(host, host->f_init);
|
|
sdio_reset(host);
|
|
mmc_go_idle(host);
|
|
|
|
mmc_set_initial_state(host);
|
|
mmc_set_initial_signal_voltage(host);
|
|
|
|
return mmc_sdio_reinit_card(host);
|
|
}
|
|
|
|
static const struct mmc_bus_ops mmc_sdio_ops = {
|
|
.remove = mmc_sdio_remove,
|
|
.detect = mmc_sdio_detect,
|
|
.pre_suspend = mmc_sdio_pre_suspend,
|
|
.suspend = mmc_sdio_suspend,
|
|
.resume = mmc_sdio_resume,
|
|
.runtime_suspend = mmc_sdio_runtime_suspend,
|
|
.runtime_resume = mmc_sdio_runtime_resume,
|
|
.alive = mmc_sdio_alive,
|
|
.hw_reset = mmc_sdio_hw_reset,
|
|
.sw_reset = mmc_sdio_sw_reset,
|
|
};
|
|
|
|
|
|
/*
|
|
* Starting point for SDIO card init.
|
|
*/
|
|
int mmc_attach_sdio(struct mmc_host *host)
|
|
{
|
|
int err, i, funcs;
|
|
u32 ocr, rocr;
|
|
struct mmc_card *card;
|
|
|
|
WARN_ON(!host->claimed);
|
|
|
|
err = mmc_send_io_op_cond(host, 0, &ocr);
|
|
if (err)
|
|
return err;
|
|
|
|
mmc_attach_bus(host, &mmc_sdio_ops);
|
|
if (host->ocr_avail_sdio)
|
|
host->ocr_avail = host->ocr_avail_sdio;
|
|
|
|
|
|
rocr = mmc_select_voltage(host, ocr);
|
|
|
|
/*
|
|
* Can we support the voltage(s) of the card(s)?
|
|
*/
|
|
if (!rocr) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Detect and init the card.
|
|
*/
|
|
err = mmc_sdio_init_card(host, rocr, NULL);
|
|
if (err)
|
|
goto err;
|
|
|
|
card = host->card;
|
|
|
|
/*
|
|
* Enable runtime PM only if supported by host+card+board
|
|
*/
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD) {
|
|
/*
|
|
* Do not allow runtime suspend until after SDIO function
|
|
* devices are added.
|
|
*/
|
|
pm_runtime_get_noresume(&card->dev);
|
|
|
|
/*
|
|
* Let runtime PM core know our card is active
|
|
*/
|
|
err = pm_runtime_set_active(&card->dev);
|
|
if (err)
|
|
goto remove;
|
|
|
|
/*
|
|
* Enable runtime PM for this card
|
|
*/
|
|
pm_runtime_enable(&card->dev);
|
|
}
|
|
|
|
/*
|
|
* The number of functions on the card is encoded inside
|
|
* the ocr.
|
|
*/
|
|
funcs = (ocr & 0x70000000) >> 28;
|
|
card->sdio_funcs = 0;
|
|
|
|
/*
|
|
* Initialize (but don't add) all present functions.
|
|
*/
|
|
for (i = 0; i < funcs; i++, card->sdio_funcs++) {
|
|
err = sdio_init_func(host->card, i + 1);
|
|
if (err)
|
|
goto remove;
|
|
|
|
/*
|
|
* Enable Runtime PM for this func (if supported)
|
|
*/
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD)
|
|
pm_runtime_enable(&card->sdio_func[i]->dev);
|
|
}
|
|
|
|
/*
|
|
* First add the card to the driver model...
|
|
*/
|
|
mmc_release_host(host);
|
|
err = mmc_add_card(host->card);
|
|
if (err)
|
|
goto remove_added;
|
|
|
|
/*
|
|
* ...then the SDIO functions.
|
|
*/
|
|
for (i = 0;i < funcs;i++) {
|
|
err = sdio_add_func(host->card->sdio_func[i]);
|
|
if (err)
|
|
goto remove_added;
|
|
}
|
|
|
|
if (host->caps & MMC_CAP_POWER_OFF_CARD)
|
|
pm_runtime_put(&card->dev);
|
|
|
|
mmc_claim_host(host);
|
|
return 0;
|
|
|
|
|
|
remove:
|
|
mmc_release_host(host);
|
|
remove_added:
|
|
/*
|
|
* The devices are being deleted so it is not necessary to disable
|
|
* runtime PM. Similarly we also don't pm_runtime_put() the SDIO card
|
|
* because it needs to be active to remove any function devices that
|
|
* were probed, and after that it gets deleted.
|
|
*/
|
|
mmc_sdio_remove(host);
|
|
mmc_claim_host(host);
|
|
err:
|
|
mmc_detach_bus(host);
|
|
|
|
pr_err("%s: error %d whilst initialising SDIO card\n",
|
|
mmc_hostname(host), err);
|
|
|
|
return err;
|
|
}
|
|
|