From patchwork Fri Feb 19 20:16:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 8363741 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CACFD9F727 for ; Fri, 19 Feb 2016 20:17:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id EC81A2047D for ; Fri, 19 Feb 2016 20:17:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D4A80204A0 for ; Fri, 19 Feb 2016 20:17:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2993511AbcBSURT (ORCPT ); Fri, 19 Feb 2016 15:17:19 -0500 Received: from sauhun.de ([89.238.76.85]:40797 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992639AbcBSURS (ORCPT ); Fri, 19 Feb 2016 15:17:18 -0500 Received: from p4fe2573c.dip0.t-ipconnect.de ([79.226.87.60]:49134 helo=localhost) by pokefinder.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1aWrUL-0007iC-2D; Fri, 19 Feb 2016 21:17:17 +0100 From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: linux-mmc@vger.kernel.org, Ben Hutchings , Dirk Behme , Wolfram Sang Subject: [RFC 4/7] mmc: tmio: Add UHS-I mode support Date: Fri, 19 Feb 2016 21:16:40 +0100 Message-Id: <1455913003-6140-5-git-send-email-wsa@the-dreams.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1455913003-6140-1-git-send-email-wsa@the-dreams.de> References: <1455913003-6140-1-git-send-email-wsa@the-dreams.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, 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 From: Ben Hutchings Based on work by Shinobu Uehara and Ben Dooks. This adds the voltage switch operation needed for all UHS-I modes, but not the tuning needed for SDR-104 which will come later. The card_busy implementation is a bit of a guess, but works for me on an R8A7790 chip. Signed-off-by: Ben Hutchings Signed-off-by: Wolfram Sang --- drivers/mmc/host/tmio_mmc.h | 3 +++ drivers/mmc/host/tmio_mmc_pio.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 34 insertions(+) diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index b44b5890290622..aabd36955e73fb 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -101,6 +101,9 @@ struct tmio_mmc_host { void (*clk_disable)(struct tmio_mmc_host *host); int (*multi_io_quirk)(struct mmc_card *card, unsigned int direction, int blk_size); + + int (*start_signal_voltage_switch)(struct tmio_mmc_host *host, + unsigned char signal_voltage); }; struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev); diff --git a/drivers/mmc/host/tmio_mmc_pio.c b/drivers/mmc/host/tmio_mmc_pio.c index ae81b34f17a5a5..081a3def9305c1 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -1012,12 +1012,43 @@ static int tmio_multi_io_quirk(struct mmc_card *card, return blk_size; } +static int tmio_mmc_start_signal_voltage_switch(struct mmc_host *mmc, + struct mmc_ios *ios) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + if (!host->start_signal_voltage_switch) + return 0; + + return host->start_signal_voltage_switch(host, ios->signal_voltage); +} + +static int tmio_mmc_card_busy(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + u32 status; + + pm_runtime_get_sync(mmc_dev(mmc)); + status = sd_ctrl_read32(host, CTL_STATUS); + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); + + /* + * Card signals busy by pulling down all of DAT[3:0]. This status + * flag appears to reflect DAT3. + */ + return !(status & TMIO_STAT_SIGSTATE_A); +} + static const struct mmc_host_ops tmio_mmc_ops = { .request = tmio_mmc_request, .set_ios = tmio_mmc_set_ios, .get_ro = tmio_mmc_get_ro, .get_cd = mmc_gpio_get_cd, .enable_sdio_irq = tmio_mmc_enable_sdio_irq, + .start_signal_voltage_switch + = tmio_mmc_start_signal_voltage_switch, + .card_busy = tmio_mmc_card_busy, .multi_io_quirk = tmio_multi_io_quirk, };