Merge tag 'mmc-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kerne…

…l/git/ulfh/mmc

Pull MMC updates from Ulf Hansson:
 "MMC core:
   - Improve API to make it clear that mmc_hw_reset() is for cards
   - Fixup support for writeback-cache for eMMC and SD
   - Check for errors after writes on SPI

  MMC host:
   - renesas_sdhi: A couple of fixes of TAP settings for eMMC HS400 mode
   - mmci_stm32: Fixup check of all elements in sg list
   - sdhci-xenon: Revert unnecessary fix for annoying 1.8V regulator warning"

* tag 'mmc-v5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: improve API to make clear mmc_hw_reset is for cards
  mmc: renesas_sdhi: don't overwrite TAP settings when HS400 tuning is complete
  mmc: renesas_sdhi: special 4tap settings only apply to HS400
  mmc: core: Fixup support for writeback-cache for eMMC and SD
  mmc: block: Check for errors after write on SPI
  mmc: mmci: stm32: correctly check all elements of sg list
  Revert "mmc: sdhci-xenon: fix annoying 1.8V regulator warning"

drivers/mmc/core/block.c

@@ -993,7 +993,7 @@ static int mmc_blk_reset(struct mmc_blk_data *md, struct mmc_host *host,
 		return -EEXIST;
 
 	md->reset_done |= type;
-	err = mmc_hw_reset(host);
+	err = mmc_hw_reset(host->card);
 	/* Ensure we switch back to the correct partition */
 	if (err) {
 		struct mmc_blk_data *main_md =
@@ -1880,6 +1880,31 @@ static inline bool mmc_blk_rq_error(struct mmc_blk_request *brq)
 	       brq->data.error || brq->cmd.resp[0] & CMD_ERRORS;
 }
 
+static int mmc_spi_err_check(struct mmc_card *card)
+{
+	u32 status = 0;
+	int err;
+
+	/*
+	 * SPI does not have a TRAN state we have to wait on, instead the
+	 * card is ready again when it no longer holds the line LOW.
+	 * We still have to ensure two things here before we know the write
+	 * was successful:
+	 * 1. The card has not disconnected during busy and we actually read our
+	 * own pull-up, thinking it was still connected, so ensure it
+	 * still responds.
+	 * 2. Check for any error bits, in particular R1_SPI_IDLE to catch a
+	 * just reconnected card after being disconnected during busy.
+	 */
+	err = __mmc_send_status(card, &status, 0);
+	if (err)
+		return err;
+	/* All R1 and R2 bits of SPI are errors in our case */
+	if (status)
+		return -EIO;
+	return 0;
+}
+
 static int mmc_blk_busy_cb(void *cb_data, bool *busy)
 {
 	struct mmc_blk_busy_data *data = cb_data;
@@ -1903,9 +1928,16 @@ static int mmc_blk_card_busy(struct mmc_card *card, struct request *req)
 	struct mmc_blk_busy_data cb_data;
 	int err;
 
-	if (mmc_host_is_spi(card->host) || rq_data_dir(req) == READ)
+	if (rq_data_dir(req) == READ)
 		return 0;
 
+	if (mmc_host_is_spi(card->host)) {
+		err = mmc_spi_err_check(card);
+		if (err)
+			mqrq->brq.data.bytes_xfered = 0;
+		return err;
+	}
+
 	cb_data.card = card;
 	cb_data.status = 0;
 	err = __mmc_poll_for_busy(card->host, 0, MMC_BLK_TIMEOUT_MS,
@@ -2350,6 +2382,8 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 	struct mmc_blk_data *md;
 	int devidx, ret;
 	char cap_str[10];
+	bool cache_enabled = false;
+	bool fua_enabled = false;
 
 	devidx = ida_simple_get(&mmc_blk_ida, 0, max_devices, GFP_KERNEL);
 	if (devidx < 0) {
@@ -2429,13 +2463,17 @@ static struct mmc_blk_data *mmc_blk_alloc_req(struct mmc_card *card,
 			md->flags |= MMC_BLK_CMD23;
 	}
 
-	if (mmc_card_mmc(card) &&
-	    md->flags & MMC_BLK_CMD23 &&
+	if (md->flags & MMC_BLK_CMD23 &&
 	    ((card->ext_csd.rel_param & EXT_CSD_WR_REL_PARAM_EN) ||
 	     card->ext_csd.rel_sectors)) {
 		md->flags |= MMC_BLK_REL_WR;
-		blk_queue_write_cache(md->queue.queue, true, true);
+		fua_enabled = true;
+		cache_enabled = true;
 	}
+	if (mmc_cache_enabled(card->host))
+		cache_enabled  = true;
+
+	blk_queue_write_cache(md->queue.queue, cache_enabled, fua_enabled);
 
 	string_get_size((u64)size, 512, STRING_UNITS_2,
 			cap_str, sizeof(cap_str));

drivers/mmc/core/core.c

@@ -1995,16 +1995,17 @@ static void mmc_hw_reset_for_init(struct mmc_host *host)
 
 /**
  * mmc_hw_reset - reset the card in hardware
- * @host: MMC host to which the card is attached
+ * @card: card to be reset
  *
  * Hard reset the card. This function is only for upper layers, like the
  * block layer or card drivers. You cannot use it in host drivers (struct
  * mmc_card might be gone then).
  *
  * Return: 0 on success, -errno on failure
  */
-int mmc_hw_reset(struct mmc_host *host)
+int mmc_hw_reset(struct mmc_card *card)
 {
+	struct mmc_host *host = card->host;
 	int ret;
 
 	ret = host->bus_ops->hw_reset(host);

drivers/mmc/core/mmc_test.c

@@ -2325,10 +2325,9 @@ static int mmc_test_profile_sglen_r_nonblock_perf(struct mmc_test_card *test)
 static int mmc_test_reset(struct mmc_test_card *test)
 {
 	struct mmc_card *card = test->card;
-	struct mmc_host *host = card->host;
 	int err;
 
-	err = mmc_hw_reset(host);
+	err = mmc_hw_reset(card);
 	if (!err) {
 		/*
 		 * Reset will re-enable the card's command queue, but tests

drivers/mmc/host/mmci_stm32_sdmmc.c

@@ -62,16 +62,16 @@ static int sdmmc_idma_validate_data(struct mmci_host *host,
 	 * excepted the last element which has no constraint on idmasize
 	 */
 	for_each_sg(data->sg, sg, data->sg_len - 1, i) {
-		if (!IS_ALIGNED(data->sg->offset, sizeof(u32)) ||
-		    !IS_ALIGNED(data->sg->length, SDMMC_IDMA_BURST)) {
+		if (!IS_ALIGNED(sg->offset, sizeof(u32)) ||
+		    !IS_ALIGNED(sg->length, SDMMC_IDMA_BURST)) {
 			dev_err(mmc_dev(host->mmc),
 				"unaligned scatterlist: ofst:%x length:%d\n",
 				data->sg->offset, data->sg->length);
 			return -EINVAL;
 		}
 	}
 
-	if (!IS_ALIGNED(data->sg->offset, sizeof(u32))) {
+	if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
 		dev_err(mmc_dev(host->mmc),
 			"unaligned last scatterlist: ofst:%x length:%d\n",
 			data->sg->offset, data->sg->length);

drivers/mmc/host/renesas_sdhi_core.c

@@ -144,9 +144,9 @@ static unsigned int renesas_sdhi_clk_update(struct tmio_mmc_host *host,
 		return clk_get_rate(priv->clk);
 
 	if (priv->clkh) {
+		/* HS400 with 4TAP needs different clock settings */
 		bool use_4tap = priv->quirks && priv->quirks->hs400_4taps;
-		bool need_slow_clkh = (host->mmc->ios.timing == MMC_TIMING_UHS_SDR104) ||
-				      (host->mmc->ios.timing == MMC_TIMING_MMC_HS400);
+		bool need_slow_clkh = host->mmc->ios.timing == MMC_TIMING_MMC_HS400;
 		clkh_shift = use_4tap && need_slow_clkh ? 1 : 2;
 		ref_clk = priv->clkh;
 	}
@@ -396,10 +396,10 @@ static void renesas_sdhi_hs400_complete(struct mmc_host *mmc)
 			SH_MOBILE_SDHI_SCC_TMPPORT2_HS400OSEL) |
 			sd_scc_read32(host, priv, SH_MOBILE_SDHI_SCC_TMPPORT2));
 
-	/* Set the sampling clock selection range of HS400 mode */
 	sd_scc_write32(host, priv, SH_MOBILE_SDHI_SCC_DTCNTL,
 		       SH_MOBILE_SDHI_SCC_DTCNTL_TAPEN |
-		       0x4 << SH_MOBILE_SDHI_SCC_DTCNTL_TAPNUM_SHIFT);
+		       sd_scc_read32(host, priv,
+				     SH_MOBILE_SDHI_SCC_DTCNTL));
 
 	/* Avoid bad TAP */
 	if (bad_taps & BIT(priv->tap_set)) {

drivers/mmc/host/sdhci-xenon.c

@@ -241,16 +241,6 @@ static void xenon_voltage_switch(struct sdhci_host *host)
 {
 	/* Wait for 5ms after set 1.8V signal enable bit */
 	usleep_range(5000, 5500);
-
-	/*
-	 * For some reason the controller's Host Control2 register reports
-	 * the bit representing 1.8V signaling as 0 when read after it was
-	 * written as 1. Subsequent read reports 1.
-	 *
-	 * Since this may cause some issues, do an empty read of the Host
-	 * Control2 register here to circumvent this.
-	 */
-	sdhci_readw(host, SDHCI_HOST_CONTROL2);
 }
 
 static unsigned int xenon_get_max_clock(struct sdhci_host *host)

drivers/net/wireless/ath/ath10k/sdio.c

@@ -1633,7 +1633,7 @@ static void ath10k_sdio_hif_power_down(struct ath10k *ar)
 		return;
 	}
 
-	ret = mmc_hw_reset(ar_sdio->func->card->host);
+	ret = mmc_hw_reset(ar_sdio->func->card);
 	if (ret)
 		ath10k_warn(ar, "unable to reset sdio: %d\n", ret);
 

drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c

@@ -4165,7 +4165,7 @@ static int brcmf_sdio_bus_reset(struct device *dev)
 
 	/* reset the adapter */
 	sdio_claim_host(sdiodev->func1);
-	mmc_hw_reset(sdiodev->func1->card->host);
+	mmc_hw_reset(sdiodev->func1->card);
 	sdio_release_host(sdiodev->func1);
 
 	brcmf_bus_change_state(sdiodev->bus_if, BRCMF_BUS_DOWN);

drivers/net/wireless/marvell/mwifiex/sdio.c

@@ -2639,7 +2639,7 @@ static void mwifiex_sdio_card_reset_work(struct mwifiex_adapter *adapter)
 
 	/* Run a HW reset of the SDIO interface. */
 	sdio_claim_host(func);
-	ret = mmc_hw_reset(func->card->host);
+	ret = mmc_hw_reset(func->card);
 	sdio_release_host(func);
 
 	switch (ret) {

drivers/net/wireless/ti/wlcore/sdio.c

@@ -146,7 +146,7 @@ static int wl12xx_sdio_power_on(struct wl12xx_sdio_glue *glue)
 	 * To guarantee that the SDIO card is power cycled, as required to make
 	 * the FW programming to succeed, let's do a brute force HW reset.
 	 */
-	mmc_hw_reset(card->host);
+	mmc_hw_reset(card);
 
 	sdio_enable_func(func);
 	sdio_release_host(func);

include/linux/mmc/core.h

@@ -175,7 +175,7 @@ void mmc_wait_for_req(struct mmc_host *host, struct mmc_request *mrq);
 int mmc_wait_for_cmd(struct mmc_host *host, struct mmc_command *cmd,
 		int retries);
 
-int mmc_hw_reset(struct mmc_host *host);
+int mmc_hw_reset(struct mmc_card *card);
 int mmc_sw_reset(struct mmc_host *host);
 void mmc_set_data_timeout(struct mmc_data *data, const struct mmc_card *card);