From patchwork Wed May 6 18:31:22 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lars-Peter Clausen X-Patchwork-Id: 6352011 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5FED2BEEE1 for ; Wed, 6 May 2015 18:31:36 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 68F0720320 for ; Wed, 6 May 2015 18:31:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 46E5A2034B for ; Wed, 6 May 2015 18:31:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751512AbbEFSba (ORCPT ); Wed, 6 May 2015 14:31:30 -0400 Received: from smtp-out-205.synserver.de ([212.40.185.205]:1105 "EHLO smtp-out-205.synserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751766AbbEFSb3 (ORCPT ); Wed, 6 May 2015 14:31:29 -0400 Received: (qmail 20661 invoked by uid 0); 6 May 2015 18:31:27 -0000 X-SynServer-TrustedSrc: 1 X-SynServer-AuthUser: lars@metafoo.de X-SynServer-PPID: 20432 Received: from p4fc461a9.dip0.t-ipconnect.de (HELO lars-adi-laptop.analog.com) [79.196.97.169] by 217.119.54.73 with SMTP; 6 May 2015 18:31:27 -0000 From: Lars-Peter Clausen To: Ulf Hansson Cc: Seungwon Jeon , Jaehoon Chung , Michal Simek , =?UTF-8?q?S=C3=B6ren=20Brinkmann?= , Thomas Abraham , Mike Looijmans , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH v2 4/4] mmc: dw_mmc: Use core to handle absent write protect line Date: Wed, 6 May 2015 20:31:22 +0200 Message-Id: <1430937082-27149-4-git-send-email-lars@metafoo.de> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1430937082-27149-1-git-send-email-lars@metafoo.de> References: <1430937082-27149-1-git-send-email-lars@metafoo.de> Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Use the new MMC_CAP2_NO_WRITE_PROTECT to let the core handle the case where no write protect line is present instead of having custom driver code to handle it. dw_mci_of_get_slot_quirks() is slightly refactored to directly modify the mmc_host capabilities instead of returning a quirk mask. Signed-off-by: Lars-Peter Clausen --- Only compile tested. --- drivers/mmc/host/dw_mmc.c | 53 +++++++++++++++------------------------------- drivers/mmc/host/dw_mmc.h | 3 --- include/linux/mmc/dw_mmc.h | 6 ------ 3 files changed, 17 insertions(+), 45 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 38b2926..0eedc5a 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -1276,10 +1276,7 @@ static int dw_mci_get_ro(struct mmc_host *mmc) int gpio_ro = mmc_gpio_get_ro(mmc); /* Use platform get_ro function, else try on board write protect */ - if ((slot->quirks & DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT) || - (slot->host->quirks & DW_MCI_QUIRK_NO_WRITE_PROTECT)) - read_only = 0; - else if (!IS_ERR_VALUE(gpio_ro)) + if (!IS_ERR_VALUE(gpio_ro)) read_only = gpio_ro; else read_only = @@ -2277,9 +2274,10 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id) } #ifdef CONFIG_OF -/* given a slot id, find out the device node representing that slot */ -static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) +/* given a slot, find out the device node representing that slot */ +static struct device_node *dw_mci_of_find_slot_node(struct dw_mci_slot *slot) { + struct device *dev = slot->mmc->parent; struct device_node *np; const __be32 *addr; int len; @@ -2291,42 +2289,28 @@ static struct device_node *dw_mci_of_find_slot_node(struct device *dev, u8 slot) addr = of_get_property(np, "reg", &len); if (!addr || (len < sizeof(int))) continue; - if (be32_to_cpup(addr) == slot) + if (be32_to_cpup(addr) == slot->id) return np; } return NULL; } -static struct dw_mci_of_slot_quirks { - char *quirk; - int id; -} of_slot_quirks[] = { - { - .quirk = "disable-wp", - .id = DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT, - }, -}; - -static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) +static void dw_mci_slot_of_parse(struct dw_mci_slot *slot) { - struct device_node *np = dw_mci_of_find_slot_node(dev, slot); - int quirks = 0; - int idx; + struct device_node *np = dw_mci_of_find_slot_node(slot); - /* get quirks */ - for (idx = 0; idx < ARRAY_SIZE(of_slot_quirks); idx++) - if (of_get_property(np, of_slot_quirks[idx].quirk, NULL)) { - dev_warn(dev, "Slot quirk %s is deprecated\n", - of_slot_quirks[idx].quirk); - quirks |= of_slot_quirks[idx].id; - } + if (!np) + return; - return quirks; + if (of_property_read_bool(np, "disable-wp")) { + slot->mmc->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; + dev_warn(slot->mmc->parent, + "Slot quirk 'disable-wp' is deprecated\n"); + } } #else /* CONFIG_OF */ -static int dw_mci_of_get_slot_quirks(struct device *dev, u8 slot) +static void dw_mci_slot_of_parse(struct dw_mci_slot *slot) { - return 0; } #endif /* CONFIG_OF */ @@ -2349,8 +2333,6 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) slot->host = host; host->slot[id] = slot; - slot->quirks = dw_mci_of_get_slot_quirks(host->dev, slot->id); - mmc->ops = &dw_mci_ops; if (of_property_read_u32_array(host->dev->of_node, "clock-freq-min-max", freq, 2)) { @@ -2388,6 +2370,8 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) if (host->pdata->caps2) mmc->caps2 = host->pdata->caps2; + dw_mci_slot_of_parse(slot); + ret = mmc_of_parse(mmc); if (ret) goto err_host_allocated; @@ -2615,9 +2599,6 @@ static struct dw_mci_of_quirks { { .quirk = "broken-cd", .id = DW_MCI_QUIRK_BROKEN_CARD_DETECTION, - }, { - .quirk = "disable-wp", - .id = DW_MCI_QUIRK_NO_WRITE_PROTECT, }, }; diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index f45ab91..2c6d350 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -227,7 +227,6 @@ extern int dw_mci_resume(struct dw_mci *host); * struct dw_mci_slot - MMC slot state * @mmc: The mmc_host representing this slot. * @host: The MMC controller this slot is using. - * @quirks: Slot-level quirks (DW_MCI_SLOT_QUIRK_XXX) * @ctype: Card type for this slot. * @mrq: mmc_request currently being processed or waiting to be * processed, or NULL when the slot is idle. @@ -245,8 +244,6 @@ struct dw_mci_slot { struct mmc_host *mmc; struct dw_mci *host; - int quirks; - u32 ctype; struct mmc_request *mrq; diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h index 1211199..5be9767 100644 --- a/include/linux/mmc/dw_mmc.h +++ b/include/linux/mmc/dw_mmc.h @@ -226,12 +226,6 @@ struct dw_mci_dma_ops { #define DW_MCI_QUIRK_HIGHSPEED BIT(2) /* Unreliable card detection */ #define DW_MCI_QUIRK_BROKEN_CARD_DETECTION BIT(3) -/* No write protect */ -#define DW_MCI_QUIRK_NO_WRITE_PROTECT BIT(4) - -/* Slot level quirks */ -/* This slot has no write protect */ -#define DW_MCI_SLOT_QUIRK_NO_WRITE_PROTECT BIT(0) struct dma_pdata;