From patchwork Fri Sep 27 13:44:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Fabio Luongo X-Patchwork-Id: 13814334 Received: from mail-lf1-f44.google.com (mail-lf1-f44.google.com [209.85.167.44]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 09AFF4C98 for ; Fri, 27 Sep 2024 13:44:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.44 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727444688; cv=none; b=WfR9+1f2oyqpFS9Wya4WtBa1FPaVXg/uTZoRBmTou8a3TZFjSg5pcXHhGAvjlULETtCy9iutaBWSQmrREQIpijvyvAONqCtj/ed72OsP5UH1FFNP5QKoicCeJ0l0jvKoHj+modwPLZlEYPK8Zk8419z2r5ZJwPGsjzBiQgAKVEw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727444688; c=relaxed/simple; bh=WnkGvpsF+zPCY8ZNlCqdmbdL1EgaUsJ+FhvjJPry82M=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=Q7Z5PQ6D6t2xzrKaEIoQwPue/zZ62JUrchFKlkExYqyrj8LqqNz+3WP6PSL7iZLqZy0x2RT0kvJdBwzW+88Qkka1aklLEDLMLFR0CPbV3OfETawnLUUIF+hIpHcVkxCKFpUmYtMs48GBU7FB5D/EbTMHpBMlZ73+iolfXryOmFU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=IwM3EbyL; arc=none smtp.client-ip=209.85.167.44 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="IwM3EbyL" Received: by mail-lf1-f44.google.com with SMTP id 2adb3069b0e04-5365c512b00so2783302e87.3 for ; Fri, 27 Sep 2024 06:44:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1727444685; x=1728049485; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=1hLn8n2gvPTOwqNF3RJ4un+JqcWSbmYXJm2ijPBUa1w=; b=IwM3EbyLCJ6J9g0Do2fYIx94C3RsFYALJBGk70Qqv36xTUEa/aRis1wM5D7YGyTRMd b95PLAzUv8PaIAbWGjXPL032c/ImQSwdpiI87QaqUx5oyj/6+VX0o1F8HRvDpgXfeaFz RYKQc6TKLlGDMO6O+yeVwq8oyW9iI5jhXPNe39JagZp2cmEBfxcCWMrt8G3TuIHhN2X1 4E0/YyTEwbMcWNu4X1O36LvCMEGVn6GTmrJa8pH1eM6f2iME5YVyvRRU5FtQNM4t8kzG f5ic8Uy/mtywVKCDhoipPyrUVL4ljS7eaRsc2tzUrxz6HCJYwi0Ms/dXG5aO3nSUDaLH 4Yig== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727444685; x=1728049485; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=1hLn8n2gvPTOwqNF3RJ4un+JqcWSbmYXJm2ijPBUa1w=; b=vesIr2+p2b8qkQjC+fE0kYCh/E85UOpg71hstcrWXWrrV6+mC/bBQzlB+p4UOANor5 qXxN7wsczCrZ9jYBNUCMS9Oqeh6lnXPppsEA1HXmJxYTkkQox7gDSWySm4qGZW5c2Be0 FA5RnTJs+QvMWhIFCLifEtgjqJxODZmZFYbRG+j80QkHXdCzugAwVnVF05KboJIN6LA6 sMCGzFtmDRtkSqPHTzzq4Yl4BrIrVqmPyGX7sL4lnQyoS9oBqFMuePdV5QGIbybJUDap Zk7WlV3xriF9Dt/MsNAtDMZGaOgr1ueXr8n/HgmPs1Q+EhnhTa/2iSzU1WFDSHCNe2Oe fpog== X-Gm-Message-State: AOJu0YynGle1DyE3/m9GOnzs3fadmWTsvanCouC+piHI4q0OipUCIgjt 9rpZkgZr92lughoTo3d+N/VS+mtLfpAbEfesBg1ULzk9isfJz4fRjB/Z6Q== X-Google-Smtp-Source: AGHT+IH4j0jC/XsZeC4xuWYjHgrq9kYXu+p3c2mxZmFoOvPG8uS2DmtVmBcX/OlejVo//tWKgPT6OQ== X-Received: by 2002:a05:6512:3c8e:b0:536:54db:ddd0 with SMTP id 2adb3069b0e04-5389fbc6660mr2295659e87.0.1727444684884; Fri, 27 Sep 2024 06:44:44 -0700 (PDT) Received: from fedora.to.infn.it (eduroam.to.infn.it. [192.84.137.37]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5c88245e763sm1169997a12.50.2024.09.27.06.44.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Sep 2024 06:44:44 -0700 (PDT) From: Fabio Luongo To: linux-usb@vger.kernel.org Cc: oneukum@suse.com, Fabio Luongo Subject: [PATCH] Add support for JULABO PRESTO to cdc_acm Date: Fri, 27 Sep 2024 15:44:04 +0200 Message-ID: <20240927134404.110284-1-f.langufo.l@gmail.com> X-Mailer: git-send-email 2.46.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 JULABO PRESTO chillers on Windows use the usbser.sys driver for communication, so the same functionality should be achievable on Linux using the cdc_acm driver. However, cdc_acm does not accomodate the quirkness of these devices, as they fail normal probing ("Zero length descriptor references"), but they also feature a single USB interface instead of two. This patch extends the effect of the `NO_UNION_NORMAL` quirk to cover the features of JULABO PRESTO devices. Signed-off-by: Fabio Luongo --- drivers/usb/class/cdc-acm.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c index 605fea461102..d77c84c6e878 100644 --- a/drivers/usb/class/cdc-acm.c +++ b/drivers/usb/class/cdc-acm.c @@ -1210,6 +1210,8 @@ static int acm_probe(struct usb_interface *intf, if (quirks == NO_UNION_NORMAL) { data_interface = usb_ifnum_to_if(usb_dev, 1); control_interface = usb_ifnum_to_if(usb_dev, 0); + if (!data_interface) + data_interface = control_interface; /* we would crash */ if (!data_interface || !control_interface) return -ENODEV; @@ -1284,6 +1286,8 @@ static int acm_probe(struct usb_interface *intf, if (data_intf_num != call_intf_num) dev_dbg(&intf->dev, "Separate call control interface. That is not fully supported.\n"); +skip_normal_probe: + if (control_interface == data_interface) { /* some broken devices designed for windows work this way */ dev_warn(&intf->dev,"Control and data interfaces are not separated!\n"); @@ -1303,8 +1307,6 @@ static int acm_probe(struct usb_interface *intf, goto made_compressed_probe; } -skip_normal_probe: - /*workaround for switched interfaces */ if (data_interface->cur_altsetting->desc.bInterfaceClass != USB_CLASS_CDC_DATA) { if (control_interface->cur_altsetting->desc.bInterfaceClass == USB_CLASS_CDC_DATA) { @@ -1787,6 +1789,9 @@ static const struct usb_device_id acm_ids[] = { { USB_DEVICE(0x0572, 0x1349), /* Hiro (Conexant) USB MODEM H50228 */ .driver_info = NO_UNION_NORMAL, /* has no union descriptor */ }, + { USB_DEVICE(0x233c, 0x7633), /* JULABO PRESTO */ + .driver_info = NO_UNION_NORMAL, + }, { USB_DEVICE(0x20df, 0x0001), /* Simtec Electronics Entropy Key */ .driver_info = QUIRK_CONTROL_LINE_STATE, }, { USB_DEVICE(0x2184, 0x001c) }, /* GW Instek AFG-2225 */