Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161126AbWBNQbs (ORCPT ); Tue, 14 Feb 2006 11:31:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161125AbWBNQbs (ORCPT ); Tue, 14 Feb 2006 11:31:48 -0500 Received: from gate.crashing.org ([63.228.1.57]:26775 "EHLO gate.crashing.org") by vger.kernel.org with ESMTP id S1161122AbWBNQbr (ORCPT ); Tue, 14 Feb 2006 11:31:47 -0500 Date: Tue, 14 Feb 2006 10:22:56 -0600 (CST) From: Kumar Gala X-X-Sender: galak@gate.crashing.org To: Bartlomiej Zolnierkiewicz , Andrew Morton cc: linux-ide@vger.kernel.org, Subject: [PATCH] ide: Allow IDE interface to specify its not capable of 32-bit operations Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2465 Lines: 70 In some embedded systems the IDE hardware interface may only support 16-bit or smaller accesses. Allow the interface to specify if this is the case and don't allow the drive or user to override the setting. Signed-off-by: Kumar Gala Acked-by: Bartlomiej Zolnierkiewicz --- commit 1680d879c98c1680df6f331b486c1985103f379a tree 4931bdac07f175bd3a6d417d37ccf1297b25ea02 parent 0a585bec4ddbef76ed4036388085c694ddd34494 author Kumar Gala Tue, 14 Feb 2006 10:29:58 -0600 committer Kumar Gala Tue, 14 Feb 2006 10:29:58 -0600 drivers/ide/ide-disk.c | 2 -- drivers/ide/ide-probe.c | 9 +++++++++ include/linux/ide.h | 1 + 3 files changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/ide/ide-disk.c b/drivers/ide/ide-disk.c index 09086b8..359f659 100644 --- a/drivers/ide/ide-disk.c +++ b/drivers/ide/ide-disk.c @@ -977,8 +977,6 @@ static void idedisk_setup (ide_drive_t * ide_dma_verbose(drive); printk("\n"); - drive->no_io_32bit = id->dword_io ? 1 : 0; - /* write cache enabled? */ if ((id->csfo & 1) || (id->cfs_enable_1 & (1 << 5))) drive->wcache = 1; diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c index 427d1c2..1b7b4c5 100644 --- a/drivers/ide/ide-probe.c +++ b/drivers/ide/ide-probe.c @@ -858,6 +858,15 @@ static void probe_hwif(ide_hwif_t *hwif) } } } + + for (unit = 0; unit < MAX_DRIVES; ++unit) { + ide_drive_t *drive = &hwif->drives[unit]; + + if (hwif->no_io_32bit) + drive->no_io_32bit = 1; + else + drive->no_io_32bit = drive->id->dword_io ? 1 : 0; + } } static int hwif_init(ide_hwif_t *hwif); diff --git a/include/linux/ide.h b/include/linux/ide.h index a7fc4cc..8d2db41 100644 --- a/include/linux/ide.h +++ b/include/linux/ide.h @@ -792,6 +792,7 @@ typedef struct hwif_s { unsigned no_dsc : 1; /* 0 default, 1 dsc_overlap disabled */ unsigned auto_poll : 1; /* supports nop auto-poll */ unsigned sg_mapped : 1; /* sg_table and sg_nents are ready */ + unsigned no_io_32bit : 1; /* 1 = can not do 32-bit IO ops */ struct device gendev; struct completion gendev_rel_comp; /* To deal with device release() */ - 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/