From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on sa.local.altlinux.org X-Spam-Level: X-Spam-Status: No, score=-3.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,RP_MATCHES_RCVD autolearn=ham autolearn_force=no version=3.4.1 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=basealt.ru; s=dkim; t=1772188379; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6LyFJJEQVrZetX+ehOV5J1jJBD0oy+ptiE1n6+0J44o=; b=Vfom0EFu7xUI5Z+PofIYmUMK0xUh89m39ufWvfKBxqR5A8z0+m1tzg2VpDEzqtJBS8Uy1Y 4LORkfs9TZeisPX/phgpLzx+W/duGiafpQUKBAgUB+MqrlyRsyTKSxXAGyz3xS0Pc6ors0 scmu5QKBtKGraZwMy5DhPAvCc+Li1PV1s+WWDAk4QqCVZ/LQt9Hs4Z8z4Ds9tn/o1MtRpM WsK47gXpMDrs/o4gHu4MBODUxvOMevOnLVeSmmBfgwIJzWRNzhoLCBBl6+xqwqk64vE8K5 wzJhOCGjJHCBNrrBV3HS13qYI56rjF5SPHWNIVgirQQ6+jdFvFc3DHx4CTsM7A== From: Daniil Gnusarev To: gnusarevda@basealt.ru, devel-kernel@lists.altlinux.org Date: Fri, 27 Feb 2026 14:32:30 +0400 Message-ID: <20260227103236.785736-30-gnusarevda@basealt.ru> X-Mailer: git-send-email 2.42.2 In-Reply-To: <20260227103236.785736-1-gnusarevda@basealt.ru> References: <20260227103236.785736-1-gnusarevda@basealt.ru> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: [d-kernel] [PATCH 29/35] input: new driver - serdev-serio X-BeenThere: devel-kernel@lists.altlinux.org X-Mailman-Version: 2.1.12 Precedence: list Reply-To: ALT Linux kernel packages development List-Id: ALT Linux kernel packages development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 27 Feb 2026 10:33:24 -0000 Archived-At: List-Archive: List-Post: From: "Vadim V. Vlasov" The driver provides serio interface from serial device. Together with ps2mult driver it enables PS/2 support for Elpitech boards. This replaces old tp_serio driver which used i2c transport and suffered from synchronization loss when PS/2 mouse is used. X-feature-Baikal-M --- drivers/input/serio/Kconfig | 11 +++ drivers/input/serio/Makefile | 1 + drivers/input/serio/serdev-serio.c | 122 +++++++++++++++++++++++++++++ 3 files changed, 134 insertions(+) create mode 100644 drivers/input/serio/serdev-serio.c diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig index c7ef347a4dffc7..f07f7c310d1af3 100644 --- a/drivers/input/serio/Kconfig +++ b/drivers/input/serio/Kconfig @@ -319,4 +319,15 @@ config USERIO If you are unsure, say N. +config SERDEV_SERIO + tristate "SERDEV SERIO driver" + depends on OF && SERIAL_DEV_BUS + help + Say Y here if you have the serial peripherals supporting serio + protocol. E.g. PS/2 line multiplexer like the one present on + TQC boards. + + To compile this driver as a module, choose M here: the + module will be called serdev-serio. + endif diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile index 6d97bad7b844ec..48c5114cfdabd2 100644 --- a/drivers/input/serio/Makefile +++ b/drivers/input/serio/Makefile @@ -33,3 +33,4 @@ obj-$(CONFIG_HYPERV_KEYBOARD) += hyperv-keyboard.o obj-$(CONFIG_SERIO_SUN4I_PS2) += sun4i-ps2.o obj-$(CONFIG_SERIO_GPIO_PS2) += ps2-gpio.o obj-$(CONFIG_USERIO) += userio.o +obj-$(CONFIG_SERDEV_SERIO) += serdev-serio.o diff --git a/drivers/input/serio/serdev-serio.c b/drivers/input/serio/serdev-serio.c new file mode 100644 index 00000000000000..5a0f666ef948da --- /dev/null +++ b/drivers/input/serio/serdev-serio.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Serdev Serio driver + * + * Copyright (C) 2022 Elpitech + */ + +#include +#include +#include +#include +#include +#include + +struct serdev_serio { + struct serdev_device *serdev; + struct serio *serio; +}; + +static int ss_serio_write(struct serio *serio, unsigned char data) +{ + struct serdev_serio *ss = serio->port_data; + struct serdev_device *serdev = ss->serdev; + + dev_dbg(&serdev->dev, "ss_write: data %02x\n", data); + serdev_device_write(serdev, &data, 1, 0); + + return 0; +} + +static size_t ss_receive_buf(struct serdev_device *serdev, + const unsigned char *buf, size_t count) +{ + struct serdev_serio *ss = serdev_device_get_drvdata(serdev); + size_t ret = count; + + dev_dbg(&serdev->dev, "ss_receive: count %d, data %02x\n", (int)count, *buf); + while (count--) + serio_interrupt(ss->serio, *buf++, 0); + + return ret; +} + +static const struct serdev_device_ops ss_serdev_ops = { + .receive_buf = ss_receive_buf, + .write_wakeup = serdev_device_write_wakeup, +}; + +static int ss_probe(struct serdev_device *serdev) +{ + struct device *dev = &serdev->dev; + struct device_node *node = dev->of_node; + struct serdev_serio *ss; + struct serio *serio; + u32 speed = 0, proto; + int ret; + + serio = kzalloc(sizeof(struct serio), GFP_KERNEL); + if (!serio) + return -ENOMEM; + + ss = devm_kzalloc(dev, sizeof(*ss), GFP_KERNEL); + if (!ss) + return -ENOMEM; + ss->serdev = serdev; + ss->serio = serio; + ret = of_property_read_u32(node, "protocol", &proto); + if (ret < 0) { + dev_err(dev, "Can't read protocol property (ret %d)\n", ret); + return ret; + } + of_property_read_u32(node, "current-speed", &speed); + serdev_device_set_drvdata(serdev, ss); + serdev_device_set_client_ops(serdev, &ss_serdev_ops); + ret = serdev_device_open(serdev); + if (ret) + return ret; + + if (speed) + serdev_device_set_baudrate(serdev, speed); + serdev_device_set_flow_control(serdev, false); + + serio->port_data = ss; + strscpy(serio->name, "Serdev Serio", sizeof(serio->name)); + strscpy(serio->phys, "serio", sizeof(serio->phys)); + serio->id.type = SERIO_RS232; + serio->id.proto = proto; + serio->id.id = SERIO_ANY; + serio->id.extra = SERIO_ANY; + serio->write = ss_serio_write; + serio_register_port(serio); + + return 0; +} + +static void ss_remove(struct serdev_device *serdev) +{ + struct serdev_serio *ss = serdev_device_get_drvdata(serdev); + + serdev_device_close(ss->serdev); + serio_unregister_port(ss->serio); +} + +static const struct of_device_id ss_of_match[] = { + { .compatible = "serdev,serio" }, + {}, +}; + +static struct serdev_device_driver serdev_serio_drv = { + .driver = { + .name = "serdev_serio", + .of_match_table = of_match_ptr(ss_of_match), + }, + .probe = ss_probe, + .remove = ss_remove, +}; + +module_serdev_device_driver(serdev_serio_drv); + +MODULE_AUTHOR("Vadim V. Vlasov "); +MODULE_DESCRIPTION("Serdev Serio driver"); +MODULE_LICENSE("GPL"); -- 2.42.2