From mboxrd@z Thu Jan 1 00:00:00 1970 From: Adrian Hunter Subject: [PATCH V3 11/30] omap_hsmmc: keep track of power mode Date: Wed, 09 Sep 2009 14:57:55 +0300 Message-ID: <20090909115755.12833.10726.sendpatchset@ahunter-laptop> References: <20090909115633.12833.39619.sendpatchset@ahunter-laptop> Return-path: Received: from smtp.nokia.com ([192.100.122.233]:42834 "EHLO mgw-mx06.nokia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753161AbZIIL5j (ORCPT ); Wed, 9 Sep 2009 07:57:39 -0400 In-Reply-To: <20090909115633.12833.39619.sendpatchset@ahunter-laptop> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Andrew Morton Cc: Jarkko Lavinen , Adrian Hunter , Madhusudhan Chikkature , Pierre Ossman , linux-omap Mailing List , linux-mmc Mailing List , Matt Fleming >>From c6da86a98f20740cf1c0944d92934322be6ab699 Mon Sep 17 00:00:00 2001 From: Adrian Hunter Date: Tue, 7 Jul 2009 16:44:11 +0300 Subject: [PATCH] omap_hsmmc: keep track of power mode This patch is preparation for adding context save and restore support. Keep track of the current power mode so that the context restore function can avoid restoring the context for a card if the power has been switched off. If the power is off, the card must be reinitialized anyway which will re-establish the context. Signed-off-by: Adrian Hunter --- drivers/mmc/host/omap_hsmmc.c | 27 +++++++++++++++++++-------- 1 files changed, 19 insertions(+), 8 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index b1bee52..8a41629 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -141,6 +141,7 @@ struct mmc_omap_host { unsigned int dma_len; unsigned int dma_sg_idx; unsigned char bus_mode; + unsigned char power_mode; u32 *buffer; u32 bytesleft; int suspended; @@ -856,16 +857,25 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) unsigned long regval; unsigned long timeout; u32 con; + int do_send_init_stream = 0; mmc_host_enable(host->mmc); - switch (ios->power_mode) { - case MMC_POWER_OFF: - mmc_slot(host).set_power(host->dev, host->slot_id, 0, 0); - break; - case MMC_POWER_UP: - mmc_slot(host).set_power(host->dev, host->slot_id, 1, ios->vdd); - break; + if (ios->power_mode != host->power_mode) { + switch (ios->power_mode) { + case MMC_POWER_OFF: + mmc_slot(host).set_power(host->dev, host->slot_id, + 0, 0); + break; + case MMC_POWER_UP: + mmc_slot(host).set_power(host->dev, host->slot_id, + 1, ios->vdd); + break; + case MMC_POWER_ON: + do_send_init_stream = 1; + break; + } + host->power_mode = ios->power_mode; } con = OMAP_HSMMC_READ(host->base, CON); @@ -931,7 +941,7 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) OMAP_HSMMC_WRITE(host->base, SYSCTL, OMAP_HSMMC_READ(host->base, SYSCTL) | CEN); - if (ios->power_mode == MMC_POWER_ON) + if (do_send_init_stream) send_init_stream(host); if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) @@ -1109,6 +1119,7 @@ static int __init omap_mmc_probe(struct platform_device *pdev) host->slot_id = 0; host->mapbase = res->start; host->base = ioremap(host->mapbase, SZ_4K); + host->power_mode = -1; platform_set_drvdata(pdev, host); INIT_WORK(&host->mmc_carddetect_work, mmc_omap_detect); -- 1.5.6.3