From patchwork Wed Feb 27 09:29:38 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= X-Patchwork-Id: 10831471 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C62851390 for ; Wed, 27 Feb 2019 09:29:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id B0C8E2C502 for ; Wed, 27 Feb 2019 09:29:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id A57FA2C7D5; Wed, 27 Feb 2019 09:29:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 326AE2C502 for ; Wed, 27 Feb 2019 09:29:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728514AbfB0J3n (ORCPT ); Wed, 27 Feb 2019 04:29:43 -0500 Received: from rere.qmqm.pl ([91.227.64.183]:28937 "EHLO rere.qmqm.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726889AbfB0J3l (ORCPT ); Wed, 27 Feb 2019 04:29:41 -0500 Received: from remote.user (localhost [127.0.0.1]) by rere.qmqm.pl (Postfix) with ESMTPSA id 448VjM0RRPzTV; Wed, 27 Feb 2019 10:28:23 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=rere.qmqm.pl; s=1; t=1551259703; bh=pVY/unEA7xdX7S/u10LnmFCPux28oJoluCX9jafQoBI=; h=Date:In-Reply-To:References:From:Subject:To:Cc:From; b=HGhHSeqPyd+Uj70b7k/c+CNLZ0SFnKeNL0yD9tfIj1O/QGhBdPKiViQzsO2W8VyXP Ao+YbcvQqzQVodwg+cKBRyyFGFVnOWID2N5wHbvKSfcBuAlNtrNBXU+OeleG6tygkk FQwFjIVbcNGL34s9t/Kq8BtVIFFzsyMl9Ok9yQJvd64FZHins8+Ol7OBHPc1FOMDJe U8k68KKousB++fCKTsSEiPvnAEE0nkD47eJ1iZlqRVj1RT6hBXQVOPCx37eckFHLww VwuvHFgdSquAeiSScWUsFCQLQLX0DwKL48rVihyEUY3aR0IzfEOrxEC//9Zt53Ma6G GMwMfxO0OBSQQ== X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.100.2 at mail Date: Wed, 27 Feb 2019 10:29:38 +0100 Message-Id: <87dc7324e7648ec078492e0c7964627ecb445ec7.1551259482.git.mirq-linux@rere.qmqm.pl> In-Reply-To: References: From: =?utf-8?b?TWljaGHFgiBNaXJvc8WCYXc=?= Subject: [PATCH v2 4/5] usb: gadget: u_serial: allow more console gadget ports MIME-Version: 1.0 To: linux-usb@vger.kernel.org Cc: Felipe Balbi , Greg Kroah-Hartman Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Allow configuring more than one console using USB serial or ACM gadget. By default, only first (ttyGS0) is a console, but this may be changed using function's new "console" attribute. Signed-off-by: Michał Mirosław --- v2: no changes --- drivers/usb/gadget/function/f_acm.c | 21 ++++++++++++ drivers/usb/gadget/function/f_serial.c | 21 ++++++++++++ drivers/usb/gadget/function/u_serial.c | 46 ++++++++++++++++++++++++++ drivers/usb/gadget/function/u_serial.h | 7 ++++ 4 files changed, 95 insertions(+) diff --git a/drivers/usb/gadget/function/f_acm.c b/drivers/usb/gadget/function/f_acm.c index 9fc98de83624..7c152c28b26c 100644 --- a/drivers/usb/gadget/function/f_acm.c +++ b/drivers/usb/gadget/function/f_acm.c @@ -771,6 +771,24 @@ static struct configfs_item_operations acm_item_ops = { .release = acm_attr_release, }; +#ifdef CONFIG_U_SERIAL_CONSOLE + +static ssize_t f_acm_console_store(struct config_item *item, + const char *page, size_t count) +{ + return gserial_set_console(to_f_serial_opts(item)->port_num, + page, count); +} + +static ssize_t f_acm_console_show(struct config_item *item, char *page) +{ + return gserial_get_console(to_f_serial_opts(item)->port_num, page); +} + +CONFIGFS_ATTR(f_acm_, console); + +#endif /* CONFIG_U_SERIAL_CONSOLE */ + static ssize_t f_acm_port_num_show(struct config_item *item, char *page) { return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num); @@ -779,6 +797,9 @@ static ssize_t f_acm_port_num_show(struct config_item *item, char *page) CONFIGFS_ATTR_RO(f_acm_, port_num); static struct configfs_attribute *acm_attrs[] = { +#ifdef CONFIG_U_SERIAL_CONSOLE + &f_acm_attr_console, +#endif &f_acm_attr_port_num, NULL, }; diff --git a/drivers/usb/gadget/function/f_serial.c b/drivers/usb/gadget/function/f_serial.c index c860f30a0ea2..1406255d0865 100644 --- a/drivers/usb/gadget/function/f_serial.c +++ b/drivers/usb/gadget/function/f_serial.c @@ -266,6 +266,24 @@ static struct configfs_item_operations serial_item_ops = { .release = serial_attr_release, }; +#ifdef CONFIG_U_SERIAL_CONSOLE + +static ssize_t f_serial_console_store(struct config_item *item, + const char *page, size_t count) +{ + return gserial_set_console(to_f_serial_opts(item)->port_num, + page, count); +} + +static ssize_t f_serial_console_show(struct config_item *item, char *page) +{ + return gserial_get_console(to_f_serial_opts(item)->port_num, page); +} + +CONFIGFS_ATTR(f_serial_, console); + +#endif /* CONFIG_U_SERIAL_CONSOLE */ + static ssize_t f_serial_port_num_show(struct config_item *item, char *page) { return sprintf(page, "%u\n", to_f_serial_opts(item)->port_num); @@ -274,6 +292,9 @@ static ssize_t f_serial_port_num_show(struct config_item *item, char *page) CONFIGFS_ATTR_RO(f_serial_, port_num); static struct configfs_attribute *acm_attrs[] = { +#ifdef CONFIG_U_SERIAL_CONSOLE + &f_serial_attr_console, +#endif &f_serial_attr_port_num, NULL, }; diff --git a/drivers/usb/gadget/function/u_serial.c b/drivers/usb/gadget/function/u_serial.c index 3466d94f1441..604e187fadb7 100644 --- a/drivers/usb/gadget/function/u_serial.c +++ b/drivers/usb/gadget/function/u_serial.c @@ -1080,6 +1080,52 @@ static void gs_console_exit(struct gs_port *port) port->console = NULL; } +ssize_t gserial_set_console(unsigned char port_num, const char *page, size_t count) +{ + struct gs_port *port; + bool enable; + int ret = -ENXIO; + + mutex_lock(&ports[port_num].lock); + port = ports[port_num].port; + + if (WARN_ON(port == NULL)) + goto out; + + ret = strtobool(page, &enable); + if (ret) + goto out; + + if (enable) + ret = gs_console_init(port); + else + gs_console_exit(port); + + mutex_unlock(&ports[port_num].lock); +out: + return ret < 0 ? ret : count; +} +EXPORT_SYMBOL_GPL(gserial_set_console); + +ssize_t gserial_get_console(unsigned char port_num, char *page) +{ + struct gs_port *port; + ssize_t ret = -ENXIO; + + mutex_lock(&ports[port_num].lock); + port = ports[port_num].port; + + if (WARN_ON(port == NULL)) + goto out; + + ret = sprintf(page, "%u\n", !!port->console); + + mutex_unlock(&ports[port_num].lock); +out: + return ret; +} +EXPORT_SYMBOL_GPL(gserial_get_console); + #else static int gs_console_connect(struct gs_port *port) diff --git a/drivers/usb/gadget/function/u_serial.h b/drivers/usb/gadget/function/u_serial.h index a86bd3ce4781..15b6061e385b 100644 --- a/drivers/usb/gadget/function/u_serial.h +++ b/drivers/usb/gadget/function/u_serial.h @@ -58,6 +58,13 @@ int gserial_alloc_line_raw(unsigned char *port_line); int gserial_alloc_line(unsigned char *port_line); void gserial_free_line(unsigned char port_line); +#ifdef CONFIG_U_SERIAL_CONSOLE + +ssize_t gserial_set_console(unsigned char port_num, const char *page, size_t count); +ssize_t gserial_get_console(unsigned char port_num, char *page); + +#endif /* CONFIG_U_SERIAL_CONSOLE */ + /* connect/disconnect is handled by individual functions */ int gserial_connect(struct gserial *, u8 port_num); void gserial_disconnect(struct gserial *);