From nobody Wed Jan 7 03:31:06 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5CA84E728E1 for ; Sat, 30 Sep 2023 19:18:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234759AbjI3TPh (ORCPT ); Sat, 30 Sep 2023 15:15:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234695AbjI3TPd (ORCPT ); Sat, 30 Sep 2023 15:15:33 -0400 Received: from hosting.gsystem.sk (hosting.gsystem.sk [212.5.213.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 81732E3 for ; Sat, 30 Sep 2023 12:15:30 -0700 (PDT) Received: from gsql.ggedos.sk (off-20.infotel.telecom.sk [212.5.213.20]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by hosting.gsystem.sk (Postfix) with ESMTPSA id CC42D7A00BF; Sat, 30 Sep 2023 21:15:27 +0200 (CEST) From: Ondrej Zary To: Damien Le Moal , Sudip Mukherjee Cc: Christoph Hellwig , Sergey Shtylyov , Jens Axboe , Tim Waugh , linux-block@vger.kernel.org, linux-parport@lists.infradead.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 1/4] pata_parport: fix pata_parport_devchk Date: Sat, 30 Sep 2023 21:15:08 +0200 Message-Id: <20230930191511.24994-2-linux@zary.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230930191511.24994-1-linux@zary.sk> References: <20230930191511.24994-1-linux@zary.sk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" There's a 'x' missing in 0x55 in pata_parport_devchk(), causing the detection to always fail. Fix it. Signed-off-by: Ondrej Zary --- drivers/ata/pata_parport/pata_parport.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/ata/pata_parport/pata_parport.c b/drivers/ata/pata_par= port/pata_parport.c index 1af64d435d3c..258d189f42e5 100644 --- a/drivers/ata/pata_parport/pata_parport.c +++ b/drivers/ata/pata_parport/pata_parport.c @@ -64,7 +64,7 @@ static bool pata_parport_devchk(struct ata_port *ap, unsi= gned int device) pi->proto->write_regr(pi, 0, ATA_REG_NSECT, 0xaa); pi->proto->write_regr(pi, 0, ATA_REG_LBAL, 0x55); =20 - pi->proto->write_regr(pi, 0, ATA_REG_NSECT, 055); + pi->proto->write_regr(pi, 0, ATA_REG_NSECT, 0x55); pi->proto->write_regr(pi, 0, ATA_REG_LBAL, 0xaa); =20 nsect =3D pi->proto->read_regr(pi, 0, ATA_REG_NSECT); --=20 Ondrej Zary From nobody Wed Jan 7 03:31:06 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD657E743DB for ; Sat, 30 Sep 2023 19:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234753AbjI3TPf (ORCPT ); Sat, 30 Sep 2023 15:15:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231603AbjI3TPd (ORCPT ); Sat, 30 Sep 2023 15:15:33 -0400 Received: from hosting.gsystem.sk (hosting.gsystem.sk [212.5.213.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2CA15D3 for ; Sat, 30 Sep 2023 12:15:30 -0700 (PDT) Received: from gsql.ggedos.sk (off-20.infotel.telecom.sk [212.5.213.20]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by hosting.gsystem.sk (Postfix) with ESMTPSA id 03CF57A01C5; Sat, 30 Sep 2023 21:15:28 +0200 (CEST) From: Ondrej Zary To: Damien Le Moal , Sudip Mukherjee Cc: Christoph Hellwig , Sergey Shtylyov , Jens Axboe , Tim Waugh , linux-block@vger.kernel.org, linux-parport@lists.infradead.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/4] pata_parport: implement set_devctl Date: Sat, 30 Sep 2023 21:15:09 +0200 Message-Id: <20230930191511.24994-3-linux@zary.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230930191511.24994-1-linux@zary.sk> References: <20230930191511.24994-1-linux@zary.sk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add missing ops->sff_set_devctl implementation. Signed-off-by: Ondrej Zary Reviewed-by: Sergey Shtylyov --- drivers/ata/pata_parport/pata_parport.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/ata/pata_parport/pata_parport.c b/drivers/ata/pata_par= port/pata_parport.c index 258d189f42e5..cf87bbb52f1f 100644 --- a/drivers/ata/pata_parport/pata_parport.c +++ b/drivers/ata/pata_parport/pata_parport.c @@ -51,6 +51,13 @@ static void pata_parport_dev_select(struct ata_port *ap,= unsigned int device) ata_sff_pause(ap); } =20 +static void pata_parport_set_devctl(struct ata_port *ap, u8 ctl) +{ + struct pi_adapter *pi =3D ap->host->private_data; + + pi->proto->write_regr(pi, 1, 6, ctl); +} + static bool pata_parport_devchk(struct ata_port *ap, unsigned int device) { struct pi_adapter *pi =3D ap->host->private_data; @@ -252,6 +259,7 @@ static struct ata_port_operations pata_parport_port_ops= =3D { .hardreset =3D NULL, =20 .sff_dev_select =3D pata_parport_dev_select, + .sff_set_devctl =3D pata_parport_set_devctl, .sff_check_status =3D pata_parport_check_status, .sff_check_altstatus =3D pata_parport_check_altstatus, .sff_tf_load =3D pata_parport_tf_load, --=20 Ondrej Zary From nobody Wed Jan 7 03:31:06 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C387E743DC for ; Sat, 30 Sep 2023 19:18:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234768AbjI3TPk (ORCPT ); Sat, 30 Sep 2023 15:15:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234738AbjI3TPe (ORCPT ); Sat, 30 Sep 2023 15:15:34 -0400 Received: from hosting.gsystem.sk (hosting.gsystem.sk [212.5.213.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 81683E1 for ; Sat, 30 Sep 2023 12:15:30 -0700 (PDT) Received: from gsql.ggedos.sk (off-20.infotel.telecom.sk [212.5.213.20]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by hosting.gsystem.sk (Postfix) with ESMTPSA id 59A087A03B4; Sat, 30 Sep 2023 21:15:28 +0200 (CEST) From: Ondrej Zary To: Damien Le Moal , Sudip Mukherjee Cc: Christoph Hellwig , Sergey Shtylyov , Jens Axboe , Tim Waugh , linux-block@vger.kernel.org, linux-parport@lists.infradead.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 3/4] pata_parport: add custom version of wait_after_reset Date: Sat, 30 Sep 2023 21:15:10 +0200 Message-Id: <20230930191511.24994-4-linux@zary.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230930191511.24994-1-linux@zary.sk> References: <20230930191511.24994-1-linux@zary.sk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Some parallel adapters (e.g. EXP Computer MC-1285B EPP Cable) return bogus values when there's no master device present. This can cause reset to fail, preventing the lone slave device (such as EXP Computer CD-865) from working. Add custom version of wait_after_reset that ignores master failure when a slave device is present. The custom version is also needed because the generic ata_sff_wait_after_reset uses direct port I/O for slave device detection. Signed-off-by: Ondrej Zary --- drivers/ata/pata_parport/pata_parport.c | 65 ++++++++++++++++++++++++- 1 file changed, 64 insertions(+), 1 deletion(-) diff --git a/drivers/ata/pata_parport/pata_parport.c b/drivers/ata/pata_par= port/pata_parport.c index cf87bbb52f1f..b3db953e615a 100644 --- a/drivers/ata/pata_parport/pata_parport.c +++ b/drivers/ata/pata_parport/pata_parport.c @@ -80,6 +80,69 @@ static bool pata_parport_devchk(struct ata_port *ap, uns= igned int device) return (nsect =3D=3D 0x55) && (lbal =3D=3D 0xaa); } =20 +static int pata_parport_wait_after_reset(struct ata_link *link, + unsigned int devmask, + unsigned long deadline) +{ + struct ata_port *ap =3D link->ap; + struct pi_adapter *pi =3D ap->host->private_data; + unsigned int dev0 =3D devmask & (1 << 0); + unsigned int dev1 =3D devmask & (1 << 1); + int rc, ret =3D 0; + + ata_msleep(ap, ATA_WAIT_AFTER_RESET); + + /* always check readiness of the master device */ + rc =3D ata_sff_wait_ready(link, deadline); + /* some adapters return bogus values if master device is not present, + * so don't abort now if a slave device is present + */ + if (rc) { + if (!dev1) + return rc; + ret =3D -ENODEV; + } + + /* if device 1 was found in ata_devchk, wait for register + * access briefly, then wait for BSY to clear. + */ + if (dev1) { + int i; + + pata_parport_dev_select(ap, 1); + + /* Wait for register access. Some ATAPI devices fail + * to set nsect/lbal after reset, so don't waste too + * much time on it. We're gonna wait for !BSY anyway. + */ + for (i =3D 0; i < 2; i++) { + u8 nsect, lbal; + + nsect =3D pi->proto->read_regr(pi, 0, ATA_REG_NSECT); + lbal =3D pi->proto->read_regr(pi, 0, ATA_REG_LBAL); + if ((nsect =3D=3D 1) && (lbal =3D=3D 1)) + break; + ata_msleep(ap, 50); /* give drive a breather */ + } + + rc =3D ata_sff_wait_ready(link, deadline); + if (rc) { + if (rc !=3D -ENODEV) + return rc; + ret =3D rc; + } + } + + /* is all this really necessary? */ + pata_parport_dev_select(ap, 0); + if (dev1) + pata_parport_dev_select(ap, 1); + if (dev0) + pata_parport_dev_select(ap, 0); + + return ret; +} + static int pata_parport_bus_softreset(struct ata_port *ap, unsigned int de= vmask, unsigned long deadline) { @@ -94,7 +157,7 @@ static int pata_parport_bus_softreset(struct ata_port *a= p, unsigned int devmask, ap->last_ctl =3D ap->ctl; =20 /* wait the port to become ready */ - return ata_sff_wait_after_reset(&ap->link, devmask, deadline); + return pata_parport_wait_after_reset(&ap->link, devmask, deadline); } =20 static int pata_parport_softreset(struct ata_link *link, unsigned int *cla= sses, --=20 Ondrej Zary From nobody Wed Jan 7 03:31:06 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D5AFE732D6 for ; Sat, 30 Sep 2023 19:18:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234764AbjI3TPi (ORCPT ); Sat, 30 Sep 2023 15:15:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40484 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234735AbjI3TPd (ORCPT ); Sat, 30 Sep 2023 15:15:33 -0400 Received: from hosting.gsystem.sk (hosting.gsystem.sk [212.5.213.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8AC9EE6 for ; Sat, 30 Sep 2023 12:15:30 -0700 (PDT) Received: from gsql.ggedos.sk (off-20.infotel.telecom.sk [212.5.213.20]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by hosting.gsystem.sk (Postfix) with ESMTPSA id 895A57A03C3; Sat, 30 Sep 2023 21:15:28 +0200 (CEST) From: Ondrej Zary To: Damien Le Moal , Sudip Mukherjee Cc: Christoph Hellwig , Sergey Shtylyov , Jens Axboe , Tim Waugh , linux-block@vger.kernel.org, linux-parport@lists.infradead.org, linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/4] pata_parport-fit3: implement IDE command set registers Date: Sat, 30 Sep 2023 21:15:11 +0200 Message-Id: <20230930191511.24994-5-linux@zary.sk> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20230930191511.24994-1-linux@zary.sk> References: <20230930191511.24994-1-linux@zary.sk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" fit3 protocol driver does not support accessing IDE control registers (device control/altstatus). The DOS driver does not use these registers either (as observed from DOSEMU trace). But the HW seems to be capable of accessing these registers - I simply tried bit 3 and it works! The control register is required to properly reset ATAPI devices or they will be detected only once (after a power cycle). Tested with EXP Computer CD-865 with MC-1285B EPP cable and TransDisk 3000. Signed-off-by: Ondrej Zary --- drivers/ata/pata_parport/fit3.c | 16 ++++------------ 1 file changed, 4 insertions(+), 12 deletions(-) diff --git a/drivers/ata/pata_parport/fit3.c b/drivers/ata/pata_parport/fit= 3.c index bad7aa920cdc..86b39966755b 100644 --- a/drivers/ata/pata_parport/fit3.c +++ b/drivers/ata/pata_parport/fit3.c @@ -9,11 +9,6 @@ * * The TD-2000 and certain older devices use a different protocol. * Try the fit2 protocol module with them. - * - * NB: The FIT adapters do not appear to support the control - * registers. So, we map ALT_STATUS to STATUS and NO-OP writes - * to the device control register - this means that IDE reset - * will not work on these devices. */ =20 #include @@ -35,10 +30,11 @@ * cont =3D 1 - access the IDE command set */ =20 +static int cont_map[] =3D { 0x00, 0x08 }; + static void fit3_write_regr(struct pi_adapter *pi, int cont, int regr, int= val) { - if (cont =3D=3D 1) - return; + regr +=3D cont_map[cont]; =20 switch (pi->mode) { case 0: @@ -59,11 +55,7 @@ static int fit3_read_regr(struct pi_adapter *pi, int con= t, int regr) { int a, b; =20 - if (cont) { - if (regr !=3D 6) - return 0xff; - regr =3D 7; - } + regr +=3D cont_map[cont]; =20 switch (pi->mode) { case 0: --=20 Ondrej Zary