From patchwork Sat Mar 12 09:15:06 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wolfram Sang X-Patchwork-Id: 8571201 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 6BB5D9F758 for ; Sat, 12 Mar 2016 09:15:51 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 85DD62035E for ; Sat, 12 Mar 2016 09:15:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9014920361 for ; Sat, 12 Mar 2016 09:15:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752364AbcCLJPl (ORCPT ); Sat, 12 Mar 2016 04:15:41 -0500 Received: from sauhun.de ([89.238.76.85]:48792 "EHLO pokefinder.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751554AbcCLJPb (ORCPT ); Sat, 12 Mar 2016 04:15:31 -0500 Received: from p4fe253ae.dip0.t-ipconnect.de ([79.226.83.174]:42588 helo=localhost) by pokefinder.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.80) (envelope-from ) id 1aefdw-00069I-GD; Sat, 12 Mar 2016 10:15:28 +0100 From: Wolfram Sang To: linux-renesas-soc@vger.kernel.org Cc: Wolfram Sang , linux-mmc@vger.kernel.org, Dirk Behme , Ben Hutchings Subject: [PATCH 04/10] mmc: tmio: Add UHS-I mode support Date: Sat, 12 Mar 2016 10:15:06 +0100 Message-Id: <1457774112-16958-5-git-send-email-wsa@the-dreams.de> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1457774112-16958-1-git-send-email-wsa@the-dreams.de> References: <1457774112-16958-1-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: Wolfram Sang 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. Signed-off-by: Ben Hutchings Signed-off-by: Wolfram Sang --- Changes since RFC: * pass whole ios instead of just signal_voltage to voltage switch function * drop PM calls from card_busy callback * read DAT0 instead of DAT3 for card_busy and simplify function drivers/mmc/host/tmio_mmc.h | 2 ++ drivers/mmc/host/tmio_mmc_pio.c | 20 ++++++++++++++++++++ include/linux/mmc/tmio.h | 2 ++ 3 files changed, 24 insertions(+) diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h index b44b5890290622..759bf015d09b84 100644 --- a/drivers/mmc/host/tmio_mmc.h +++ b/drivers/mmc/host/tmio_mmc.h @@ -101,6 +101,8 @@ 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, + struct mmc_ios *ios); }; 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..4b5a7af2d2273f 100644 --- a/drivers/mmc/host/tmio_mmc_pio.c +++ b/drivers/mmc/host/tmio_mmc_pio.c @@ -1012,12 +1012,32 @@ 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); +} + +static int tmio_mmc_card_busy(struct mmc_host *mmc) +{ + struct tmio_mmc_host *host = mmc_priv(mmc); + + return !(sd_ctrl_read32(host, CTL_STATUS2) & TMIO_STATUS2_DAT0); +} + 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, }; diff --git a/include/linux/mmc/tmio.h b/include/linux/mmc/tmio.h index 5f5cd80e976500..b2f28e99503383 100644 --- a/include/linux/mmc/tmio.h +++ b/include/linux/mmc/tmio.h @@ -63,6 +63,8 @@ #define TMIO_STAT_CMD_BUSY 0x40000000 #define TMIO_STAT_ILL_ACCESS 0x80000000 +#define TMIO_STATUS2_DAT0 BIT(7) + #define CLK_CTL_DIV_MASK 0xff #define CLK_CTL_SCLKEN BIT(8)