From patchwork Mon Dec 2 16:52:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Fenkart X-Patchwork-Id: 3266271 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 078779F373 for ; Mon, 2 Dec 2013 16:55:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A9E0C20184 for ; Mon, 2 Dec 2013 16:55:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 526B4201F5 for ; Mon, 2 Dec 2013 16:55:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752804Ab3LBQzj (ORCPT ); Mon, 2 Dec 2013 11:55:39 -0500 Received: from mail-ea0-f174.google.com ([209.85.215.174]:61257 "EHLO mail-ea0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752685Ab3LBQzi (ORCPT ); Mon, 2 Dec 2013 11:55:38 -0500 Received: by mail-ea0-f174.google.com with SMTP id b10so9126928eae.19 for ; Mon, 02 Dec 2013 08:55:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=rvr9ptfdvwAxaArwI3RKvw2RgZpw12oSAvBYjQ1c7g0=; b=KHEW0iYcwMqxLWl7azkO6s39DAR0MdclRiEM259O8BTsMok5xtqAN3kUoygACkoE1q nwR40BNoP4ON1FyZRk6NzNOoVb9ZuE14Fk6dZM+gdswZtzRgHl/OVsIeb3a0O2WFM4zW N/5ljQbAvr6rYZwFAXF/VrJps+xHKVlN1JLNpVSqLizBbOgl8HX4vgb2eOs7X7U2VeE1 S5kXPvV1EayiB97QU+orSqwxIRcSABnGawM6tuJsKc5iFBJx6ib0n0gl8xtb6Qh0BD22 0X9s5fFIgoucrWHmC5HfLq6hPW4CEz1qhaVKRZEYTVBdpnHwc4Ec7pICIXZgd4vS5mso w1kQ== X-Received: by 10.14.215.67 with SMTP id d43mr422961eep.108.1386003336619; Mon, 02 Dec 2013 08:55:36 -0800 (PST) Received: from localhost (ip-94-112-2-16.net.upcbroadband.cz. [94.112.2.16]) by mx.google.com with ESMTPSA id 1sm72725780eeg.4.2013.12.02.08.55.34 for (version=TLSv1.2 cipher=RC4-SHA bits=128/128); Mon, 02 Dec 2013 08:55:36 -0800 (PST) From: Andreas Fenkart To: Chris Ball Cc: Tony Lindgren , Grant Likely , Felipe Balbi , Balaji T K , zonque@gmail.com, galak@codeaurora.org, linux-doc@vger.kernel.org, linux-mmc@vger.kernel.org, linux-omap@vger.kernel.org, Andreas Fenkart Subject: [PATCH v4 1/3] mmc: omap_hsmmc: Enable SDIO IRQ. Date: Mon, 2 Dec 2013 17:52:38 +0100 Message-Id: <1386003160-23733-2-git-send-email-afenkart@gmail.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1386003160-23733-1-git-send-email-afenkart@gmail.com> References: <1386003160-23733-1-git-send-email-afenkart@gmail.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For now, only support SDIO interrupt if we are booted with DT. This is because some platforms need special quirks. And we don't want to add new legacy mux platform init code callbacks any longer as we are moving to DT based booting anyways. Signed-off-by: Andreas Fenkart --- drivers/mmc/host/omap_hsmmc.c | 109 ++++++++++++++++++++++++++++---- include/linux/platform_data/mmc-omap.h | 1 + 2 files changed, 97 insertions(+), 13 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 8be5c9f..c197028 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -131,6 +131,7 @@ static void apply_clk_hack(struct device *dev) #define TC_EN (1 << 1) #define BWR_EN (1 << 4) #define BRR_EN (1 << 5) +#define CIRQ_EN (1 << 8) #define ERR_EN (1 << 15) #define CTO_EN (1 << 16) #define CCRC_EN (1 << 17) @@ -215,6 +216,9 @@ struct omap_hsmmc_host { int reqs_blocked; int use_reg; int req_in_progress; + int flags; +#define HSMMC_SDIO_IRQ_ENABLED (1 << 0) /* SDIO irq enabled */ + struct omap_hsmmc_next next_data; struct omap_mmc_platform_data *pdata; }; @@ -495,27 +499,40 @@ static void omap_hsmmc_stop_clock(struct omap_hsmmc_host *host) static void omap_hsmmc_enable_irq(struct omap_hsmmc_host *host, struct mmc_command *cmd) { - unsigned int irq_mask; + u32 irq_mask = INT_EN_MASK; + unsigned long flags; if (host->use_dma) - irq_mask = INT_EN_MASK & ~(BRR_EN | BWR_EN); - else - irq_mask = INT_EN_MASK; + irq_mask &= ~(BRR_EN | BWR_EN); /* Disable timeout for erases */ if (cmd->opcode == MMC_ERASE) irq_mask &= ~DTO_EN; + spin_lock_irqsave(&host->irq_lock, flags); OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); + + /* latch pending CIRQ, but don't signal */ + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) + irq_mask |= CIRQ_EN; OMAP_HSMMC_WRITE(host->base, IE, irq_mask); + spin_unlock_irqrestore(&host->irq_lock, flags); } static void omap_hsmmc_disable_irq(struct omap_hsmmc_host *host) { - OMAP_HSMMC_WRITE(host->base, ISE, 0); - OMAP_HSMMC_WRITE(host->base, IE, 0); + u32 irq_mask = 0; + unsigned long flags; + + spin_lock_irqsave(&host->irq_lock, flags); + /* no transfer running, need to signal cirq if enabled */ + if (host->flags & HSMMC_SDIO_IRQ_ENABLED) + irq_mask |= CIRQ_EN; + OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); + OMAP_HSMMC_WRITE(host->base, IE, irq_mask); OMAP_HSMMC_WRITE(host->base, STAT, STAT_CLEAR); + spin_unlock_irqrestore(&host->irq_lock, flags); } /* Calculate divisor for the given clock frequency */ @@ -1078,8 +1095,12 @@ static irqreturn_t omap_hsmmc_irq(int irq, void *dev_id) int status; status = OMAP_HSMMC_READ(host->base, STAT); - while (status & INT_EN_MASK && host->req_in_progress) { - omap_hsmmc_do_irq(host, status); + while (status & (INT_EN_MASK | CIRQ_EN)) { + if (host->req_in_progress) + omap_hsmmc_do_irq(host, status); + + if (status & CIRQ_EN) + mmc_signal_sdio_irq(host->mmc); /* Flush posted write */ status = OMAP_HSMMC_READ(host->base, STAT); @@ -1591,6 +1612,37 @@ static void omap_hsmmc_init_card(struct mmc_host *mmc, struct mmc_card *card) mmc_slot(host).init_card(card); } +static void omap_hsmmc_enable_sdio_irq(struct mmc_host *mmc, int enable) +{ + struct omap_hsmmc_host *host = mmc_priv(mmc); + u32 irq_mask; + unsigned long flags; + + spin_lock_irqsave(&host->irq_lock, flags); + + irq_mask = OMAP_HSMMC_READ(host->base, ISE); + if (enable) { + host->flags |= HSMMC_SDIO_IRQ_ENABLED; + irq_mask |= CIRQ_EN; + } else { + host->flags &= ~HSMMC_SDIO_IRQ_ENABLED; + irq_mask &= ~CIRQ_EN; + } + OMAP_HSMMC_WRITE(host->base, IE, irq_mask); + + /* + * if enable, piggy back detection on current request + * but always disable immediately + */ + if (!host->req_in_progress || !enable) + OMAP_HSMMC_WRITE(host->base, ISE, irq_mask); + + /* flush posted write */ + OMAP_HSMMC_READ(host->base, IE); + + spin_unlock_irqrestore(&host->irq_lock, flags); +} + static void omap_hsmmc_conf_bus_power(struct omap_hsmmc_host *host) { u32 hctl, capa, value; @@ -1643,7 +1695,7 @@ static const struct mmc_host_ops omap_hsmmc_ops = { .get_cd = omap_hsmmc_get_cd, .get_ro = omap_hsmmc_get_ro, .init_card = omap_hsmmc_init_card, - /* NYET -- enable_sdio_irq */ + .enable_sdio_irq = omap_hsmmc_enable_sdio_irq, }; #ifdef CONFIG_DEBUG_FS @@ -1705,7 +1757,18 @@ static void omap_hsmmc_debugfs(struct mmc_host *mmc) #endif #ifdef CONFIG_OF -static u16 omap4_reg_offset = 0x100; +struct of_data { + u16 offset; + int flags; +}; + +static struct of_data omap4_data = { + .offset = 0x100, +}; +static struct of_data am33xx_data = { + .offset = 0x100, + .flags = OMAP_HSMMC_SWAKEUP_MISSING, +}; static const struct of_device_id omap_mmc_of_match[] = { { @@ -1716,7 +1779,11 @@ static const struct of_device_id omap_mmc_of_match[] = { }, { .compatible = "ti,omap4-hsmmc", - .data = &omap4_reg_offset, + .data = &omap4_data, + }, + { + .compatible = "ti,am33xx-hsmmc", + .data = &am33xx_data, }, {}, }; @@ -1801,8 +1868,9 @@ static int omap_hsmmc_probe(struct platform_device *pdev) return PTR_ERR(pdata); if (match->data) { - const u16 *offsetp = match->data; - pdata->reg_offset = *offsetp; + const struct of_data *d = match->data; + pdata->reg_offset = d->offset; + pdata->controller_flags |= d->flags; } } @@ -2020,6 +2088,21 @@ static int omap_hsmmc_probe(struct platform_device *pdev) dev_warn(&pdev->dev, "pins are not configured from the driver\n"); + /* + * For now, only support SDIO interrupt if we are booted with + * DT. This is because some platforms need special quirks. And + * we don't want to add new legacy mux platform init code + * callbacks any longer as we are moving to DT based booting + * anyways. + */ + if (pdev->dev.of_node) { + mmc->caps |= MMC_CAP_SDIO_IRQ; + if (pdata->controller_flags & OMAP_HSMMC_SWAKEUP_MISSING) { + /* no wakeup from deeper power states, use polling */ + mmc->caps &= ~MMC_CAP_SDIO_IRQ; + } + } + omap_hsmmc_protect_card(host); mmc_add_host(mmc); diff --git a/include/linux/platform_data/mmc-omap.h b/include/linux/platform_data/mmc-omap.h index 2bf1b30..51e70cf 100644 --- a/include/linux/platform_data/mmc-omap.h +++ b/include/linux/platform_data/mmc-omap.h @@ -28,6 +28,7 @@ */ #define OMAP_HSMMC_SUPPORTS_DUAL_VOLT BIT(0) #define OMAP_HSMMC_BROKEN_MULTIBLOCK_READ BIT(1) +#define OMAP_HSMMC_SWAKEUP_MISSING BIT(2) struct mmc_card;