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Tue, 10 Aug 2010 18:02:00 -0700 Message-Id: <201008110102.o7B11xUH027109@imap1.linux-foundation.org> X-ASG-Orig-Subj: [patch 054/177] sdhci: add auto CMD12 support for eSDHC driver Subject: [patch 054/177] sdhci: add auto CMD12 support for eSDHC driver To: torvalds@linux-foundation.org Cc: akpm@linux-foundation.org, Chang-Ming.Huang@freescale.com, benh@kernel.crashing.org, galak@gate.crashing.org, grant.likely@secretlab.ca, linux-mmc@vger.kernel.org, tie-fei.zang@freescale.com From: akpm@linux-foundation.org Date: Tue, 10 Aug 2010 18:01:59 -0700 MIME-Version: 1.0 X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.13 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Barracuda-Connect: vger.kernel.org[209.132.180.67] X-Barracuda-Start-Time: 1281490143 X-Barracuda-URL: http://18.85.46.23:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at laptop.org X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=3.5 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=5.5 tests=NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.37635 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name diff -puN drivers/mmc/host/sdhci-of-core.c~sdhci-add-auto-cmd12-support-for-esdhc-driver drivers/mmc/host/sdhci-of-core.c --- a/drivers/mmc/host/sdhci-of-core.c~sdhci-add-auto-cmd12-support-for-esdhc-driver +++ a/drivers/mmc/host/sdhci-of-core.c @@ -154,6 +154,10 @@ static int __devinit sdhci_of_probe(stru host->ops = &sdhci_of_data->ops; } + if (of_get_property(np, "sdhci,auto-cmd12", NULL)) + host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12; + + if (of_get_property(np, "sdhci,1-bit-only", NULL)) host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA; diff -puN drivers/mmc/host/sdhci.c~sdhci-add-auto-cmd12-support-for-esdhc-driver drivers/mmc/host/sdhci.c --- a/drivers/mmc/host/sdhci.c~sdhci-add-auto-cmd12-support-for-esdhc-driver +++ a/drivers/mmc/host/sdhci.c @@ -818,8 +818,12 @@ static void sdhci_set_transfer_mode(stru WARN_ON(!host->data); mode = SDHCI_TRNS_BLK_CNT_EN; - if (data->blocks > 1) - mode |= SDHCI_TRNS_MULTI; + if (data->blocks > 1) { + if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) + mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_ACMD12; + else + mode |= SDHCI_TRNS_MULTI; + } if (data->flags & MMC_DATA_READ) mode |= SDHCI_TRNS_READ; if (host->flags & SDHCI_REQ_USE_DMA) @@ -1109,6 +1113,12 @@ static void sdhci_request(struct mmc_hos #ifndef SDHCI_USE_LEDS_CLASS sdhci_activate_led(host); #endif + if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) { + if (mrq->stop) { + mrq->data->stop = NULL; + mrq->stop = NULL; + } + } host->mrq = mrq; diff -puN drivers/mmc/host/sdhci.h~sdhci-add-auto-cmd12-support-for-esdhc-driver drivers/mmc/host/sdhci.h --- a/drivers/mmc/host/sdhci.h~sdhci-add-auto-cmd12-support-for-esdhc-driver +++ a/drivers/mmc/host/sdhci.h @@ -243,6 +243,8 @@ struct sdhci_host { #define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26) /* Controller is missing device caps. Use caps provided by host */ #define SDHCI_QUIRK_MISSING_CAPS (1<<27) +/* Controller uses Auto CMD12 command to stop the transfer */ +#define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<28) int irq; /* Device IRQ */ void __iomem * ioaddr; /* Mapped address */