From patchwork Wed Apr 21 10:31:51 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 425284 Delivered-To: patches@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp203460jao; Wed, 21 Apr 2021 03:32:08 -0700 (PDT) X-Received: by 2002:a2e:7010:: with SMTP id l16mr4434145ljc.41.1619001127985; Wed, 21 Apr 2021 03:32:07 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619001127; cv=none; d=google.com; s=arc-20160816; b=dFyYkv+dMRqIsDVy+h0pDzjcR/tU4mnsY81YO2wdINqq/RdXVXLafdAhH+yK+lCKo6 GeNzRI1uXWeCeXG7FVAmg57OxiSDtVhwAlska4W3bYtxAb/dUo4WLin9C+jO7OCC39r8 v8PL3NJmlLC8OSrsOfPGUCTDFEFWn1Xz+tzA2lJwUZRurki3Pw5HtDct4S5Wd5REmRss jksfpVlYzgAlDaONBt0wfAZ6sPmge+xaBc1UY6s7R/ngjP2Q2rTtQBqVcHrS8m4TpE7T UP3PEmLopRLM1mpld0xP+wQWYl3KhEvEywhZ/QfiWgBZqOMtxkqdnopgXS2yQ/y/ap/O p5og== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=CK5ZIEcklumCxnJNLBKoSlxqImVpYTzG5Udsn4Ishsw=; b=qdsItxbsiX0zdyynsEcazcff/sq/QMfX1Qb5nOkLlSlGFMsq1YPtXwgnkuBOVBL8V9 Pc1oC/Kl8ALhsZUxz3IsdIiagv0Ldyj1EyCLUJ2VwUpka9bDWJbFFJDNLuGZk+9xhZOl VDGkKUMCASaABVrk0HI0AuvkDp9kwXf50tSHvfeHiGfvQA0XbzceOyi1YcJpLPhh4eh/ xzGqFB9dytAjD+LM8I69NqJ+y0oxeuyJF2SM/yatfOwdJe9QPM5Mz75fWQ9mWESduL// NYOqha9eIMDSpobROvnXU6bMG/UcEiQ6nztEU258FK/PFEppLm0qRXDhiqM7HBR5FTES fSVA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=NfwbLuvj; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id w15sor377707lft.135.2021.04.21.03.32.07 for (Google Transport Security); Wed, 21 Apr 2021 03:32:07 -0700 (PDT) Received-SPF: pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=NfwbLuvj; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=CK5ZIEcklumCxnJNLBKoSlxqImVpYTzG5Udsn4Ishsw=; b=NfwbLuvjkQ46lE3tfHiUd1UVjBQdEFZFRmA85If0MapK4xLiIpe9e769dDZ/tMC55c OyNMD5PBJoUa/4ir6pJ9ZQyPlIGEGyfxJb0MZMAwX0tPdyNGhesy465To4aNY/gdyCkN 6Sjv0cUpOy7IO3sA8bLNhdru1DzjPFf3fwuHOaZt7usJBpmYnnqK8z2j91sxoOMsbhAu T3foVqNKF/vmvUCgp001jS/hjrFtgafpPQExxU0uRl/WLqrcjZVTdiA3y7+0kDTPlHQm ZThmzbXndKWHk2E/lVdMzao4cQ4vY1yUIASaLlRVPNyme5YkJHkJveGXTZTOQlrzRq4U x1iQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=CK5ZIEcklumCxnJNLBKoSlxqImVpYTzG5Udsn4Ishsw=; b=lDNR9s5rlpV8fQaFwMoAstQJYrNrByCsP5aaqpzV66KwDvhDfDZbywj/a+0z2HZvPV 8G5lgYmmck++hmoUztRctfnm1dv73vs43YWZet8oofDEd6ln9X0OZGm2yOjE1O/Z8+Fj Z1aJJATciUDefv+b8PpPoLD9E2i0ECXbqRJqFJDV+x81Y4PHzGScst2H1jZ6tRMuEJh5 LP8kSMUGXwoTq8zhT70TuVsqlywq9sPf06S88kmZKEseNncM3UCj2h3l/Kv9QJSonyc5 HSPQv+vofI2fJg8naDUvdMn600eh89yE9OEEoRz7+xR8OyLwUg0LdeFD/psD4CsyYkGx ltnw== X-Gm-Message-State: AOAM532aWa0PIpn0FmvfdEIOxxpjwrkA0AJx/XQdp/G43BYRGtSDsNqs fpMn2kxpfo5rALH3fOtRF1K0/LmcTl3Wgo3p62w= X-Google-Smtp-Source: ABdhPJw9+YrZ+qOFFIfvbAx57atTu7H7oJy61BBb5cvZnyc5yynow4ONRd/Z65zuDWLe+Mk9NaNP7w== X-Received: by 2002:a19:7704:: with SMTP id s4mr20262774lfc.268.1619001127623; Wed, 21 Apr 2021 03:32:07 -0700 (PDT) Return-Path: Received: from localhost.localdomain (h-155-4-129-234.NA.cust.bahnhof.se. [155.4.129.234]) by smtp.gmail.com with ESMTPSA id u13sm170603lfg.139.2021.04.21.03.32.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 03:32:06 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson , Adrian Hunter Cc: Shawn Lin , Avri Altman , Masami Hiramatsu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/4] mmc: core: Parse the SD SCR register for support of CMD48/49 and CMD58/59 Date: Wed, 21 Apr 2021 12:31:51 +0200 Message-Id: <20210421103154.169410-2-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210421103154.169410-1-ulf.hansson@linaro.org> References: <20210421103154.169410-1-ulf.hansson@linaro.org> MIME-Version: 1.0 In SD spec v4.x the support for CMD48/49 and CMD58/59 were introduced as optional features. To let the card announce whether it supports the commands, the SCR register has been extended with corresponding support bits. Let's parse and store the information. Signed-off-by: Ulf Hansson --- drivers/mmc/core/sd.c | 4 +++- include/linux/mmc/card.h | 2 ++ 2 files changed, 5 insertions(+), 1 deletion(-) -- 2.25.1 diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index 2c48d6504101..de7b5f8df550 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -222,7 +222,9 @@ static int mmc_decode_scr(struct mmc_card *card) else card->erased_byte = 0x0; - if (scr->sda_spec3) + if (scr->sda_spec4) + scr->cmds = UNSTUFF_BITS(resp, 32, 4); + else if (scr->sda_spec3) scr->cmds = UNSTUFF_BITS(resp, 32, 2); /* SD Spec says: any SD Card shall set at least bits 0 and 2 */ diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index f9ad35dd6012..858fc4d11240 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -139,6 +139,8 @@ struct sd_scr { unsigned char cmds; #define SD_SCR_CMD20_SUPPORT (1<<0) #define SD_SCR_CMD23_SUPPORT (1<<1) +#define SD_SCR_CMD48_SUPPORT (1<<2) +#define SD_SCR_CMD58_SUPPORT (1<<3) }; struct sd_ssr { From patchwork Wed Apr 21 10:31:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 425285 Delivered-To: patches@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp203481jao; Wed, 21 Apr 2021 03:32:09 -0700 (PDT) X-Received: by 2002:a05:6512:3e09:: with SMTP id i9mr5009574lfv.243.1619001129679; Wed, 21 Apr 2021 03:32:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619001129; cv=none; d=google.com; s=arc-20160816; b=mJEUt+sU4ANMlzk5jTExvtx1a/G13hKzQ6iXS4p8SzRxyxnT584AeoXQMpif6XMuIK fOUPEYOpr8/t7XUaLv/J/Xv4lOeEVnUKQ6SRpP+vIxAFrg5eHcZR+B3rbBerFcjk9c2u cOCgQoufGNsq63G23Qtm3OOUfidcX//0sJDcp7MGPZBB7Hr6/vXuXfwVetxXqc0CK2MJ 9VOrLhzp9C4HlRkjysytvLo22IEuvF78hGzObV/jaoJj9wLYtys2UlpxH3wT9MhisMUX uehtcW1L2P4OyfohdewrdR2dqrDIUHaJcqE3yv0PKzm9xRyZfq6J36NSTMz9pyEwuC85 6kng== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=3W0ReYXRDLZ9Zk92wTxQ+mDg4oUgh0CQC6EcZq5vXt8=; b=iMMALNdECdoPYDClB7DYKSIyBwtZNpO/UJx9T5hySTY0538XLKPLtW/3x8BOZjI0Yv xnaC51ttqq9WkJKeHrPKZrGoyZSb38+oXZ2r05Nbds1s+mtuN4k6lsYPDOK0F1VYs1C6 /ERhBvH0S2ebes80Bhzkd6RT5poYHY250NCWQw67wVwRQ+rPt2jpuoIdDktQ67vvOPCL C1KPoKAJ7Sb1qJvc8dKsa2665ZqeDe1m7JrM2dZ5/LPlnIWC94MhuwY83Pv1BZKmp5sP dQR9uK/9PjkefoxbrOOJM08ZSXNIhuSq9kIfkSIEi3bTCxxnmBHf3jOMJnqOsAcVwPbo zu+A== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=GhiCkljr; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id x23sor392567lfu.30.2021.04.21.03.32.09 for (Google Transport Security); Wed, 21 Apr 2021 03:32:09 -0700 (PDT) Received-SPF: pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=GhiCkljr; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=3W0ReYXRDLZ9Zk92wTxQ+mDg4oUgh0CQC6EcZq5vXt8=; b=GhiCkljrdNvqz8QU4hX9Tvnr6q+NsiDe277dOmS8cRYIm9XTToYEn/exylT2vI4HH8 Za7AV2XxPytEAmwzvjr7ZyDSom3b6sxdkds7uiS30xeBbmF1+g47zPMDbeJPFLk0y5xf HkeETLlOTg140sM+6GzQKfTBjuGTyF1Xd9uJ2S4TXKyG+Z3be5Xb9nh4Kt7GQT6C7G/0 0d+EK4IMoctJ6f/fN0aJTtoDrl875CeUsHv2qzKnzFR+GOHM8tB/bACK+l/9V9qAsCtZ gxH9W93t96yVTYi1kW4sHrgCdUmdF76PtXEB8V3OxBrkvcKwOwGSuZS1dp7IhwOFx48J fEAA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3W0ReYXRDLZ9Zk92wTxQ+mDg4oUgh0CQC6EcZq5vXt8=; b=ExeMcx9abHrKhbwXXIUist53ydQCQhtPzzT3B5bqxpfuA4W/KzBAzeVoHyEpj3D/K3 7YpEWJbCz5qemb9DjZuk4jFxmwx7QoNkYX1eSwRe2nidFQ2WS7s7zgGib25ichrHTfU9 dXVRILSS78+snQd8Ni9KjQ5iTB5nIHEG27cRsbbH3KBh9JDIFvXreLdSTyMKS10cGNIz yZ3SWFd3c5dF2X+zVjppV7YFkPrigfOgUOPAgvi7tqv3ynwq/TfrHdCu6EJ7CqDN5KUt sI5WxNNJo3mMEmorq4PtKmRfx6IHtDecRVHdty8Pa38SUkiEJ4BkWNCBP51sHkHXm3cP mOiQ== X-Gm-Message-State: AOAM532s/jQzr8gHwbuZh4NkFP1FEiggz8N+dolDxRv9MBoJciaWTbDM SEizrmMUlZXMnTGIFCn3HEPiyDRV X-Google-Smtp-Source: ABdhPJxFQ8YxIK3vd8BtH0GSoGH0VjymzL2Lks/uZpkaUbebB0LOmNrGQQvoVoVZIOUEfTpknokAOw== X-Received: by 2002:a05:6512:b8f:: with SMTP id b15mr20669206lfv.633.1619001129306; Wed, 21 Apr 2021 03:32:09 -0700 (PDT) Return-Path: Received: from localhost.localdomain (h-155-4-129-234.NA.cust.bahnhof.se. [155.4.129.234]) by smtp.gmail.com with ESMTPSA id u13sm170603lfg.139.2021.04.21.03.32.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 03:32:08 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson , Adrian Hunter Cc: Shawn Lin , Avri Altman , Masami Hiramatsu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] mmc: core: Prepare mmc_send_cxd_data() to be used for CMD48 for SD cards Date: Wed, 21 Apr 2021 12:31:52 +0200 Message-Id: <20210421103154.169410-3-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210421103154.169410-1-ulf.hansson@linaro.org> References: <20210421103154.169410-1-ulf.hansson@linaro.org> MIME-Version: 1.0 The CMD48 is used to read the SD function extension registers, which is an ADTC type of command with an R1 response. It's very similar to the commands that are currently being managed via mmc_send_cxd_data(). Therefore, let's adapt mmc_send_cxd_data() so it can manage CMD48 as well. While at it, let's also rename the function to mmc_send_adtc_data() as it better describes its purpose. Signed-off-by: Ulf Hansson --- drivers/mmc/core/mmc_ops.c | 11 +++++------ drivers/mmc/core/mmc_ops.h | 2 ++ 2 files changed, 7 insertions(+), 6 deletions(-) -- 2.25.1 diff --git a/drivers/mmc/core/mmc_ops.c b/drivers/mmc/core/mmc_ops.c index aa6a85783723..148fdc528382 100644 --- a/drivers/mmc/core/mmc_ops.c +++ b/drivers/mmc/core/mmc_ops.c @@ -245,9 +245,8 @@ mmc_send_cxd_native(struct mmc_host *host, u32 arg, u32 *cxd, int opcode) * NOTE: void *buf, caller for the buf is required to use DMA-capable * buffer or on-stack buffer (with some overhead in callee). */ -static int -mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, - u32 opcode, void *buf, unsigned len) +int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode, + u32 args, void *buf, unsigned len) { struct mmc_request mrq = {}; struct mmc_command cmd = {}; @@ -258,7 +257,7 @@ mmc_send_cxd_data(struct mmc_card *card, struct mmc_host *host, mrq.data = &data; cmd.opcode = opcode; - cmd.arg = 0; + cmd.arg = args; /* 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 @@ -304,7 +303,7 @@ static int mmc_spi_send_cxd(struct mmc_host *host, u32 *cxd, u32 opcode) if (!cxd_tmp) return -ENOMEM; - ret = mmc_send_cxd_data(NULL, host, opcode, cxd_tmp, 16); + ret = mmc_send_adtc_data(NULL, host, opcode, 0, cxd_tmp, 16); if (ret) goto err; @@ -352,7 +351,7 @@ int mmc_get_ext_csd(struct mmc_card *card, u8 **new_ext_csd) if (!ext_csd) return -ENOMEM; - err = mmc_send_cxd_data(card, card->host, MMC_SEND_EXT_CSD, ext_csd, + err = mmc_send_adtc_data(card, card->host, MMC_SEND_EXT_CSD, 0, ext_csd, 512); if (err) kfree(ext_csd); diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h index 5782fdf4e8e9..55b8ad1d004c 100644 --- a/drivers/mmc/core/mmc_ops.h +++ b/drivers/mmc/core/mmc_ops.h @@ -25,6 +25,8 @@ int mmc_set_dsr(struct mmc_host *host); int mmc_go_idle(struct mmc_host *host); int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr); int mmc_set_relative_addr(struct mmc_card *card); +int mmc_send_adtc_data(struct mmc_card *card, struct mmc_host *host, u32 opcode, + u32 args, void *buf, unsigned len); int mmc_send_csd(struct mmc_card *card, u32 *csd); int __mmc_send_status(struct mmc_card *card, u32 *status, unsigned int retries); int mmc_send_status(struct mmc_card *card, u32 *status); From patchwork Wed Apr 21 10:31:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 425286 Delivered-To: patches@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp203515jao; Wed, 21 Apr 2021 03:32:12 -0700 (PDT) X-Received: by 2002:ac2:5284:: with SMTP id q4mr11729023lfm.33.1619001132043; Wed, 21 Apr 2021 03:32:12 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619001132; cv=none; d=google.com; s=arc-20160816; b=xTZkj3x+eLZQCb2VubmOZKjQ9K6Nxy7B1rgrJRzBoDpYTYokM1YibAnAx2sQc6dpI/ lNEH2kBq14ECA+gxTOb9V2t1FEBBAFigS4SIZWjA3J821xplLQk/EdEX3YQhaYvq7kC9 gwFSxVR/rtfpGURyn+bAg5X9flpcMOXgm2E0OwyHjwxiRo+g39PxuW/fw0ikOl4ZXCda CINQMw/W76o8qxqixktGyJ4+UPIJ+E1zx+y2RfAbpAlMWqSfwTbPZakgeZM661EiHsOh g0D1WHoO/rU/lA69/jvIOPCsGQVjCz1HNUDxRYIaHIEtGUE0yGatq30ar6R1OMfr/9gr KoJA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=p42aSuTP9ycrpt9alD1QzOosKqJLUbQFJmk5Gcksb8o=; b=EeQI869xLq8QKSJUlOaXLJdpDJFMtdDowIrOUIwnXT6goY84+q3kzjDHma3wmUYEWj CuDMiD7gpxI8IXUx1LuBCIVLoZ+J+2N9iqZQcJuRWJBfN3EWamjCePGDwESp9fdqVkmh +u2PsFp6MZAZ+yxWG3cDr5gY0xWcC+KA7vKQrTKSp2lNjTqk0GS4rm6NokrRoMB4GeJV Qwr7cVrh/s3CBvzIiqZSleX4kBw4xmwbQ8+vv7GCOb2XThdedD78bDrvw3CCnsc5K1wK UdB4WVlRelUJfKravWc26rDKjcSThiov7CtSNZ1/fEQyT6a7LF456JwUz/u3DI8uj3mm k9oA== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=dtcEWguW; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id a15sor405105lfo.174.2021.04.21.03.32.11 for (Google Transport Security); Wed, 21 Apr 2021 03:32:12 -0700 (PDT) Received-SPF: pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=dtcEWguW; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=p42aSuTP9ycrpt9alD1QzOosKqJLUbQFJmk5Gcksb8o=; b=dtcEWguWKgPrkE0BoroYBUokeGvPeP+oZCK8Rx+QarSqm3C3e8plUV/y5nsEG8tkSv H5jrhQpkXvr8EfB1ZfNRXRKaeH9UmED/KrPcwRoAn1SRclhwzY+We0XRcCsJspR7ob// MaxwmDnRCKCoIRkmyBRCKd9h3XAm2Hjd20cCx7jLmObzYk/Ig8KUYEww7ZoYhXUXwvvA zwz3v7CvW/oyuq66dPLJ6je/V8i+dsBq9+vd9oOFpe5bS6I7fGJfunUXvIDY/nJq1ZtB fLmML9N7kKhkChhnqfbhfZzdq9VgOeOMU8qpGB7njTgEwqiwoiZExoQ6mHf6+yQ0wU5M m8uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=p42aSuTP9ycrpt9alD1QzOosKqJLUbQFJmk5Gcksb8o=; b=eOQWev3TRLEUdTm81uQczE8cdKfMYoP/y4VUO6KQYfM8G76V9+EmRJEj/yuNpLHxiL Ah4J/L42aJ6hhyJfwJTZVl2atZAq3dBxQRl10kYbL18T5m9zAiOKSwgotMDTlD4p596M sAqp5hz5AEwewvBxhbMWuieFNJjdlfIb19L2OMc4dDfIBh9qYFV20gMng0/ZvnNSbnPd ZI2WeeERSJX8Ni+SU1W75Q0IUg/5dsp6AHff/zAfxQegVt/2UL3YESr+p4M2eZmKmj0k k9AbpM/A9/y/qEU7Xc2UTLNjUEtBD00UctEyfSBjJipqYGAViT48dI4kUMb7mttkStcD pS2A== X-Gm-Message-State: AOAM5314mDnjB3ay/hhD0m0r1RZTJ5DXb8gch6RxwhEdxf3tVDATtFpw vTjp2VO2wen/GTgNTFDY3KQPSFSO X-Google-Smtp-Source: ABdhPJy2JtntEDgBLncqUuq+UlgbGEoS2hh9aOE8NnVsMaj+KsyfLMdFl1plsd1kB9E96qTBmi+LdQ== X-Received: by 2002:a19:e309:: with SMTP id a9mr18805329lfh.222.1619001131641; Wed, 21 Apr 2021 03:32:11 -0700 (PDT) Return-Path: Received: from localhost.localdomain (h-155-4-129-234.NA.cust.bahnhof.se. [155.4.129.234]) by smtp.gmail.com with ESMTPSA id u13sm170603lfg.139.2021.04.21.03.32.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 03:32:10 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson , Adrian Hunter Cc: Shawn Lin , Avri Altman , Masami Hiramatsu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] mmc: core: Read the SD function extension registers for power management Date: Wed, 21 Apr 2021 12:31:53 +0200 Message-Id: <20210421103154.169410-4-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210421103154.169410-1-ulf.hansson@linaro.org> References: <20210421103154.169410-1-ulf.hansson@linaro.org> MIME-Version: 1.0 In SD spec v4.x the SD function extension registers were introduced. A specific function register were added to let the card announce support for optional features in regards to power management. The features that were added are "Power Off Notification", "Power Down Mode" and "Power Sustenance". As a first step, let's read and parse this register for power management during the SD card initialization and store the information about the supported features in the struct mmc_card. In this way, it becomes easier for subsequent changes to implement the complete support. Signed-off-by: Ulf Hansson --- drivers/mmc/core/sd.c | 172 +++++++++++++++++++++++++++++++++++++++ include/linux/mmc/card.h | 12 +++ include/linux/mmc/sd.h | 3 + 3 files changed, 187 insertions(+) -- 2.25.1 diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index de7b5f8df550..d6e838b7c895 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -996,6 +996,171 @@ static bool mmc_sd_card_using_v18(struct mmc_card *card) (SD_MODE_UHS_SDR50 | SD_MODE_UHS_SDR104 | SD_MODE_UHS_DDR50); } +static int sd_read_ext_reg_fno(struct mmc_card *card, u8 fno, u32 reg_addr, + u8 **buf) +{ + int err; + u8 *tmp_buf; + u32 cmd_args; + + /* + * Arguments of CMD48 to read a page of 512 bytes: + * [31:31] MIO (0 = memory). + * [30:27] FNO (function number). + * [26:26] reserved (0). + * [25:18] page number. + * [17:9] offset address. + * [8:0] length (1FF = 512 bytes data). + */ + cmd_args = 0x000001ff | fno << 27 | reg_addr << 9; + + tmp_buf = kzalloc(512, GFP_KERNEL); + if (!tmp_buf) + return -ENOMEM; + + err = mmc_send_adtc_data(card, card->host, SD_READ_EXTR_SINGLE, + cmd_args, tmp_buf, 512); + if (err) + kfree(tmp_buf); + else + *buf = tmp_buf; + + return err; +} + +static int sd_decode_ext_reg_power(struct mmc_card *card, u8 fno, u32 reg_addr) +{ + int err; + u8 *reg_buf; + + /* Read the extension register for power management function. */ + err = sd_read_ext_reg_fno(card, fno, reg_addr, ®_buf); + if (err) { + pr_warn("%s: error %d reading PM func of ext reg\n", + mmc_hostname(card->host), err); + return err; + } + + /* PM revision consists of 4 bits. */ + card->ext_power.rev = reg_buf[0] & 0xf; + + /* Power Off Notification support at bit 4. */ + if (reg_buf[1] & 0x10) + card->ext_power.feature_support |= SD_EXT_POWER_OFF_NOTIFY; + + /* Power Sustenance support at bit 5. */ + if (reg_buf[1] & 0x20) + card->ext_power.feature_support |= SD_EXT_POWER_SUSTENANCE; + + /* Power Down Mode support at bit 6. */ + if (reg_buf[1] & 0x40) + card->ext_power.feature_support |= SD_EXT_POWER_DOWN_MODE; + + card->ext_power.reg_addr = reg_addr; + card->ext_power.fno = fno; + + kfree(reg_buf); + return 0; +} + +static int sd_decode_ext_reg(struct mmc_card *card, u8 *gen_info_buf, + u16 *next_ext_addr) +{ + u8 num_reg_sets, fno; + u16 ext = *next_ext_addr, sfc; + u32 reg_set_addr, reg_addr; + + /* + * Parse only one register set per extension, as that is sufficient to + * support the Standard Functions. This means another 48 bytes in the + * buffer must be available. + */ + if (ext + 48 > 512) + return -EFAULT; + + /* Standard Function Code */ + memcpy(&sfc, &gen_info_buf[ext], 2); + + /* Address to the next extension. */ + memcpy(next_ext_addr, &gen_info_buf[ext + 40], 2); + + /* Number of registers sets for this extension. */ + num_reg_sets = gen_info_buf[ext + 42]; + + if (num_reg_sets != 1) + return 0; + + /* Extension register address. */ + memcpy(®_set_addr, &gen_info_buf[ext + 44], 4); + + /* First 17 bits contains the page and the offset. */ + reg_addr = reg_set_addr & 0x1FFFF; + + /* 4 bits (18 to 21) contains the Function Number. */ + fno = reg_set_addr >> 18 & 0xf; + + /* Standard Function Code for power management. */ + if (sfc == 0x1) + return sd_decode_ext_reg_power(card, fno, reg_addr); + + return 0; +} + +static int sd_read_ext_regs(struct mmc_card *card) +{ + int err, i; + u8 num_ext, *gen_info_buf; + u16 rev, len, next_ext_addr; + + if (mmc_host_is_spi(card->host)) + return 0; + + if (!(card->scr.cmds & SD_SCR_CMD48_SUPPORT)) + return 0; + + /* Read general info at page 0, with no offset and FNO=0. */ + err = sd_read_ext_reg_fno(card, 0, 0, &gen_info_buf); + if (err) { + pr_warn("%s: error %d reading general info of SD ext reg\n", + mmc_hostname(card->host), err); + return err; + } + + /* General info structure revision. */ + memcpy(&rev, &gen_info_buf[0], 2); + + /* Length of general info in bytes. */ + memcpy(&len, &gen_info_buf[2], 2); + + /* Number of extensions to be find. */ + num_ext = gen_info_buf[4]; + + /* We support revision 0, but limit it to 512 bytes - for simplicity. */ + if (rev != 0 || len > 512) { + pr_warn("%s: non-supported SD ext reg layout\n", + mmc_hostname(card->host)); + goto out; + } + + /* + * Read/parse the extension registers. The first extension should start + * immediately after the general info header (16 bytes). + */ + next_ext_addr = 16; + for (i = 0; i < num_ext; i++) { + err = sd_decode_ext_reg(card, gen_info_buf, &next_ext_addr); + if (err) { + pr_warn("%s: error %d parsing SD ext reg\n", + mmc_hostname(card->host), err); + goto out; + } + } + +out: + kfree(gen_info_buf); + return err; +} + /* * Handle the detection and initialisation of a card. * @@ -1144,6 +1309,13 @@ static int mmc_sd_init_card(struct mmc_host *host, u32 ocr, } } + if (!oldcard) { + /* Read/parse the extension registers. */ + err = sd_read_ext_regs(card); + if (err) + goto free_card; + } + if (host->cqe_ops && !host->cqe_enabled) { err = host->cqe_ops->cqe_enable(host, card); if (!err) { diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 858fc4d11240..6a1d64fba0f3 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -191,6 +191,17 @@ struct sd_switch_caps { #define SD_MAX_CURRENT_800 (1 << SD_SET_CURRENT_LIMIT_800) }; +struct sd_ext_reg { + u32 reg_addr; + u8 fno; + u8 rev; + u8 feature_support; +/* Power Management Function. */ +#define SD_EXT_POWER_OFF_NOTIFY (1<<0) +#define SD_EXT_POWER_SUSTENANCE (1<<1) +#define SD_EXT_POWER_DOWN_MODE (1<<2) +}; + struct sdio_cccr { unsigned int sdio_vsn; unsigned int sd_vsn; @@ -292,6 +303,7 @@ struct mmc_card { struct sd_scr scr; /* extra SD information */ struct sd_ssr ssr; /* yet more SD information */ struct sd_switch_caps sw_caps; /* switch (CMD6) caps */ + struct sd_ext_reg ext_power; /* SD extension reg for PM */ unsigned int sdio_funcs; /* number of SDIO functions */ atomic_t sdio_funcs_probed; /* number of probed SDIO funcs */ diff --git a/include/linux/mmc/sd.h b/include/linux/mmc/sd.h index 2236aa540faa..43bfc5c39ad4 100644 --- a/include/linux/mmc/sd.h +++ b/include/linux/mmc/sd.h @@ -29,6 +29,9 @@ #define SD_APP_OP_COND 41 /* bcr [31:0] OCR R3 */ #define SD_APP_SEND_SCR 51 /* adtc R1 */ + /* class 11 */ +#define SD_READ_EXTR_SINGLE 48 /* adtc [31:0] R1 */ + /* OCR bit definitions */ #define SD_OCR_S18R (1 << 24) /* 1.8V switching request */ #define SD_ROCR_S18A SD_OCR_S18R /* 1.8V switching accepted by card */ From patchwork Wed Apr 21 10:31:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 425287 Delivered-To: patches@linaro.org Received: by 2002:a02:c901:0:0:0:0:0 with SMTP id t1csp203530jao; Wed, 21 Apr 2021 03:32:14 -0700 (PDT) X-Received: by 2002:ac2:46c8:: with SMTP id p8mr18336084lfo.561.1619001133929; Wed, 21 Apr 2021 03:32:13 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1619001133; cv=none; d=google.com; s=arc-20160816; b=UdjFxdAY1QnMCCpR+v8hWxvwByjx3eoEno+CbvuvpY2hGLp2HH6xjZKbGl6sJ4njsA mq/4h0z0vuFJwjR7cvKY3CbZMuBPvSYI324ngzy1aWBBM9d4DSN3U5wLhKSlP+IG8QIc fYDBpDjFGy71ohfgD5waTjOq7c1TSElVctmgISJW1tw3Abe8cO5m3WJyJWFJlVi74FAk FWagkVbXvavPbHLfTsbIdr56aKQouEQWJAgrDZhhn6ShykjvcSpIGj1wmbmShwpBiWI0 tpV7Z1ck7hleP4uvyPNMEj2P0SRGmLi0THx+ZvTr8J2sAaFLsa/RwRKaWWk1bWOBfNXM NxJQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:dkim-signature; bh=bcsktzE2LmD65+1hOHiSw/mP2z1mU2lSfJMjIjsWTl8=; b=HNvmkdnF3a6qfYkNybn4T8bzs9X2eSiDOP7YRCcFztfolw40NfKChPm0Pmvi+WR67Z j/5Y90CTjzhhCjCX0JS84mt/R7K08K3RbvVLxShKPIgxw0iHhFcOgJ25Ea0E7wOYjMTG 9iWy4tQMBxrYKndRG7WZG4ASActDBOsT7qXePrWLH5+i6GRQlNfq1A10CLI47uYN+Asp gyCvl7Tp/tV0C9Qt1e1bZCnvEbkKlaDgD/ZYdwqELV3M7x8em8otaXF61+70A44FZlEe 6GFuseSj+kt693i+bTOyM24AH7yA6n5VbUXqHSlXLOJPN2K7wMzFOGrAk/LubCcONHrU uyyQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=MeDREFOX; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Return-Path: Received: from mail-sor-f41.google.com (mail-sor-f41.google.com. [209.85.220.41]) by mx.google.com with SMTPS id 84sor396258lfm.11.2021.04.21.03.32.13 for (Google Transport Security); Wed, 21 Apr 2021 03:32:13 -0700 (PDT) Received-SPF: pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=MeDREFOX; spf=pass (google.com: domain of ulf.hansson@linaro.org designates 209.85.220.41 as permitted sender) smtp.mailfrom=ulf.hansson@linaro.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bcsktzE2LmD65+1hOHiSw/mP2z1mU2lSfJMjIjsWTl8=; b=MeDREFOXhXuJmdNkZlfNo6r09BtFQhtpatiA2dLOAjjAx9WJX57MEqtOeMptwJzzxg KcFM8UVx0SBV4dYxGqW+lMn/XOuElbSINB3SPmjzyeEr36jWpVyIwgfPxwa8ssflH2mJ Oxolx5TZP8FqxdkDpcOeNYrs4SB5XroN/kGPdRGF9BF/qijCo8EDgYg6VMySHJfVq2hA z29f+TyFBf1pCEfF7kx9mvQBUWc32kJJuNY5XG87OR7ZsqmuKlJ0GbDGfTS98sSe2gAb i8ZRbFepki5l8v/b9AHTV32HDeKv1wZbpuFH0314bcqBTpdBW9PE+iVZ4ltSbO6R/x/G M/Pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bcsktzE2LmD65+1hOHiSw/mP2z1mU2lSfJMjIjsWTl8=; b=ulopd9WzDfExpd2b68y5A22fwSqzIvavr6DcN56QScoLE9SLXQUOFpLOWrjwWhKQKx y8ON4njraB6SH9t67Q0IC5oLIxlKZF9SFcBAltPrQm1/gu78pYnrw4ZeKCjr1QVsOFlI b0jI/N5fpTxb5J3M96aK6Tmj7Xb73Mc8O77giGxufd0a3jZj7FvLw2i6U8Y66D+awbSQ 6+tBpnQxWs4GIYyxPM1vwv+m92fmqTqbO9DsDM0OKP9FYTf8EtW9cSKhneIE3fYYomsw Qdo5/irQheN+wRBlWJqr8fP5cif9kWkuwbs+S/5QkUtAPaxD3ZQXjWkHZ4Prai6w90Hd X0bA== X-Gm-Message-State: AOAM531X5vZidNfAf5/Mw8qP/NoA8/0O5XQDt8P04jJMQbW+ar1C4kq0 oQ3aYTUiGQeQk/jhH2I2McLuBS/Z X-Google-Smtp-Source: ABdhPJxV6dxPVTt9qygoUmgvT6O4ATvKPQcYo7j/3FM4lE7OAyE15x7FJ/923njgXMQ0S3Iy0/lpcQ== X-Received: by 2002:a05:6512:12c3:: with SMTP id p3mr12128089lfg.595.1619001133570; Wed, 21 Apr 2021 03:32:13 -0700 (PDT) Return-Path: Received: from localhost.localdomain (h-155-4-129-234.NA.cust.bahnhof.se. [155.4.129.234]) by smtp.gmail.com with ESMTPSA id u13sm170603lfg.139.2021.04.21.03.32.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Apr 2021 03:32:12 -0700 (PDT) From: Ulf Hansson To: linux-mmc@vger.kernel.org, Ulf Hansson , Adrian Hunter Cc: Shawn Lin , Avri Altman , Masami Hiramatsu , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] mmc: core: Read performance enhancements registers for SD cards Date: Wed, 21 Apr 2021 12:31:54 +0200 Message-Id: <20210421103154.169410-5-ulf.hansson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210421103154.169410-1-ulf.hansson@linaro.org> References: <20210421103154.169410-1-ulf.hansson@linaro.org> MIME-Version: 1.0 In SD spec v6.x the SD function extension registers for performance enhancements were introduced. These registers let the SD card announce supports for various performance related features, like "self-maintenance", "cache" and "command queuing". Let's extend the parsing of SD function extension registers and store the information in the struct mmc_card. This allows subsequent changes to easier implement the complete support for new the performance enhancement features. Signed-off-by: Ulf Hansson --- drivers/mmc/core/sd.c | 46 ++++++++++++++++++++++++++++++++++++++++ include/linux/mmc/card.h | 7 ++++++ 2 files changed, 53 insertions(+) -- 2.25.1 diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c index d6e838b7c895..0e946afd6d22 100644 --- a/drivers/mmc/core/sd.c +++ b/drivers/mmc/core/sd.c @@ -1063,6 +1063,48 @@ static int sd_decode_ext_reg_power(struct mmc_card *card, u8 fno, u32 reg_addr) return 0; } +static int sd_decode_ext_reg_perf(struct mmc_card *card, u8 fno, u32 reg_addr) +{ + int err; + u8 *reg_buf; + + err = sd_read_ext_reg_fno(card, fno, reg_addr, ®_buf); + if (err) { + pr_warn("%s: error %d reading PERF func of ext reg\n", + mmc_hostname(card->host), err); + return err; + } + + /* PERF revision. */ + card->ext_perf.rev = reg_buf[0]; + + /* FX_EVENT support at bit 0. */ + if (reg_buf[1] & 0x1) + card->ext_perf.feature_support |= SD_EXT_PERF_FX_EVENT; + + /* Card initiated self-maintenance support at bit 0. */ + if (reg_buf[2] & 0x1) + card->ext_perf.feature_support |= SD_EXT_PERF_CARD_MAINT; + + /* Host initiated self-maintenance support at bit 1. */ + if (reg_buf[2] & 0x2) + card->ext_perf.feature_support |= SD_EXT_PERF_HOST_MAINT; + + /* Cache support at bit 0. */ + if (reg_buf[4] & 0x1) + card->ext_perf.feature_support |= SD_EXT_PERF_CACHE; + + /* Command queue support indicated via queue depth bits (0 to 4). */ + if (reg_buf[6] & 0x1f) + card->ext_perf.feature_support |= SD_EXT_PERF_CMD_QUEUE; + + card->ext_perf.reg_addr = reg_addr; + card->ext_perf.fno = fno; + + kfree(reg_buf); + return 0; +} + static int sd_decode_ext_reg(struct mmc_card *card, u8 *gen_info_buf, u16 *next_ext_addr) { @@ -1103,6 +1145,10 @@ static int sd_decode_ext_reg(struct mmc_card *card, u8 *gen_info_buf, if (sfc == 0x1) return sd_decode_ext_reg_power(card, fno, reg_addr); + /* Standard Function Code for performance enhancement. */ + if (sfc == 0x2) + return sd_decode_ext_reg_perf(card, fno, reg_addr); + return 0; } diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 6a1d64fba0f3..8e21eebe704d 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -200,6 +200,12 @@ struct sd_ext_reg { #define SD_EXT_POWER_OFF_NOTIFY (1<<0) #define SD_EXT_POWER_SUSTENANCE (1<<1) #define SD_EXT_POWER_DOWN_MODE (1<<2) +/* Performance Enhancement Function. */ +#define SD_EXT_PERF_FX_EVENT (1<<0) +#define SD_EXT_PERF_CARD_MAINT (1<<1) +#define SD_EXT_PERF_HOST_MAINT (1<<2) +#define SD_EXT_PERF_CACHE (1<<3) +#define SD_EXT_PERF_CMD_QUEUE (1<<4) }; struct sdio_cccr { @@ -304,6 +310,7 @@ struct mmc_card { struct sd_ssr ssr; /* yet more SD information */ struct sd_switch_caps sw_caps; /* switch (CMD6) caps */ struct sd_ext_reg ext_power; /* SD extension reg for PM */ + struct sd_ext_reg ext_perf; /* SD extension reg for PERF */ unsigned int sdio_funcs; /* number of SDIO functions */ atomic_t sdio_funcs_probed; /* number of probed SDIO funcs */