Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757973AbZCLQ1A (ORCPT ); Thu, 12 Mar 2009 12:27:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757722AbZCLQZm (ORCPT ); Thu, 12 Mar 2009 12:25:42 -0400 Received: from smtp.nokia.com ([192.100.122.230]:25494 "EHLO mgw-mx03.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757871AbZCLQZl (ORCPT ); Thu, 12 Mar 2009 12:25:41 -0400 From: Adrian Hunter To: Pierre Ossman Cc: Jarkko Lavinen , Adrian Hunter , Grazvydas Ignotas , David Brownell , linux-omap Mailing List , Tony Lindgren , lkml Date: Thu, 12 Mar 2009 18:24:00 +0200 Message-Id: <20090312162400.19421.13764.sendpatchset@ahunter-laptop> In-Reply-To: <20090312162252.19421.34019.sendpatchset@ahunter-laptop> References: <20090312162252.19421.34019.sendpatchset@ahunter-laptop> Subject: [PATCH 10/10] OMAP: HSMMC: Wait for SDBP X-OriginalArrivalTime: 12 Mar 2009 16:23:35.0488 (UTC) FILETIME=[E48A9400:01C9A32E] X-Nokia-AV: Clean Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1975 Lines: 66 >From e543f7849ab668fa0cbabc048e37e090e7b6f167 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Thu, 12 Mar 2009 17:08:26 +0200 Subject: [PATCH] OMAP: HSMMC: Wait for SDBP It is necessary to wait for bus power before sending any commands. Signed-off-by: Adrian Hunter --- drivers/mmc/host/omap_hsmmc.c | 20 +++++++++++++++----- 1 files changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 91381f4..2f444c8 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -546,6 +546,19 @@ static irqreturn_t mmc_omap_irq(int irq, void *dev_id) return IRQ_HANDLED; } +static void set_sd_bus_power(struct mmc_omap_host *host) +{ + unsigned long i; + + OMAP_HSMMC_WRITE(host->base, HCTL, + OMAP_HSMMC_READ(host->base, HCTL) | SDBP); + for (i = 0; i < loops_per_jiffy; i++) { + if (OMAP_HSMMC_READ(host->base, HCTL) & SDBP) + break; + cpu_relax(); + } +} + /* * Switch MMC interface voltage ... only relevant for MMC1. * @@ -602,9 +615,7 @@ static int omap_mmc_switch_opcond(struct mmc_omap_host *host, int vdd) reg_val |= SDVS30; OMAP_HSMMC_WRITE(host->base, HCTL, reg_val); - - OMAP_HSMMC_WRITE(host->base, HCTL, - OMAP_HSMMC_READ(host->base, HCTL) | SDBP); + set_sd_bus_power(host); return 0; err: @@ -997,8 +1008,7 @@ static void omap_hsmmc_init(struct mmc_omap_host *host) OMAP_HSMMC_WRITE(host->base, SYSCONFIG, value | AUTOIDLE); /* Set SD bus power bit */ - value = OMAP_HSMMC_READ(host->base, HCTL); - OMAP_HSMMC_WRITE(host->base, HCTL, value | SDBP); + set_sd_bus_power(host); } static struct mmc_host_ops mmc_omap_ops = { -- 1.5.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/