From patchwork Wed Jan 15 12:59:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Bogendoerfer X-Patchwork-Id: 11334415 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CC62013B4 for ; Wed, 15 Jan 2020 13:00:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A84842073A for ; Wed, 15 Jan 2020 13:00:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726100AbgAONAH (ORCPT ); Wed, 15 Jan 2020 08:00:07 -0500 Received: from mx2.suse.de ([195.135.220.15]:33086 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726088AbgAONAG (ORCPT ); Wed, 15 Jan 2020 08:00:06 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 36DB7AFE1; Wed, 15 Jan 2020 13:00:03 +0000 (UTC) From: Thomas Bogendoerfer To: Dmitry Torokhov , linux-kernel@vger.kernel.org, linux-input@vger.kernel.org Subject: [PATCH] Input: add IOC3 serio driver Date: Wed, 15 Jan 2020 13:59:50 +0100 Message-Id: <20200115125951.3677-1-tbogendoerfer@suse.de> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org This patch adds a platform driver for supporting keyboard and mouse interface of SGI IOC3 chips. Signed-off-by: Thomas Bogendoerfer --- drivers/input/serio/Kconfig | 10 ++ drivers/input/serio/Makefile | 1 + drivers/input/serio/ioc3kbd.c | 183 ++++++++++++++++++++++++++++++++++ 3 files changed, 194 insertions(+) create mode 100644 drivers/input/serio/ioc3kbd.c diff --git a/drivers/input/serio/Kconfig b/drivers/input/serio/Kconfig index f3e18f8ef9ca..373a1646019e 100644 --- a/drivers/input/serio/Kconfig +++ b/drivers/input/serio/Kconfig @@ -165,6 +165,16 @@ config SERIO_MACEPS2 To compile this driver as a module, choose M here: the module will be called maceps2. +config SERIO_SGI_IOC3 + tristate "SGI IOC3 PS/2 controller" + depends on SGI_MFD_IOC3 + help + Say Y here if you have an SGI Onyx2, SGI Octane or IOC3 PCI card + and you want to attach and use a keyboard, mouse, or both. + + To compile this driver as a module, choose M here: the + module will be called ioc3kbd. + config SERIO_LIBPS2 tristate "PS/2 driver library" depends on SERIO_I8042 || SERIO_I8042=n diff --git a/drivers/input/serio/Makefile b/drivers/input/serio/Makefile index 67950a5ccb3f..6d97bad7b844 100644 --- a/drivers/input/serio/Makefile +++ b/drivers/input/serio/Makefile @@ -20,6 +20,7 @@ obj-$(CONFIG_HIL_MLC) += hp_sdc_mlc.o hil_mlc.o obj-$(CONFIG_SERIO_PCIPS2) += pcips2.o obj-$(CONFIG_SERIO_PS2MULT) += ps2mult.o obj-$(CONFIG_SERIO_MACEPS2) += maceps2.o +obj-$(CONFIG_SERIO_SGI_IOC3) += ioc3kbd.o obj-$(CONFIG_SERIO_LIBPS2) += libps2.o obj-$(CONFIG_SERIO_RAW) += serio_raw.o obj-$(CONFIG_SERIO_AMS_DELTA) += ams_delta_serio.o diff --git a/drivers/input/serio/ioc3kbd.c b/drivers/input/serio/ioc3kbd.c new file mode 100644 index 000000000000..814ca640732f --- /dev/null +++ b/drivers/input/serio/ioc3kbd.c @@ -0,0 +1,183 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * SGI IOC3 PS/2 controller driver for linux + * + * Copyright (C) 2019 Thomas Bogendoerfer + * + * Based on code Copyright (C) 2005 Stanislaw Skowronek + * Copyright (C) 2009 Johannes Dickgreber + */ + +#include +#include +#include +#include +#include +#include + +#include + +struct ioc3kbd_data { + struct ioc3_serioregs __iomem *regs; + struct serio *kbd, *aux; + int irq; +}; + +static int ioc3kbd_wait(struct ioc3_serioregs __iomem *regs, u32 mask) +{ + unsigned long timeout = 0; + + while ((readl(®s->km_csr) & mask) && (timeout < 250)) { + udelay(50); + timeout++; + } + return (timeout >= 250) ? -ETIMEDOUT : 0; +} + +static int ioc3kbd_write(struct serio *dev, u8 val) +{ + struct ioc3kbd_data *d = dev->port_data; + int ret; + + ret = ioc3kbd_wait(d->regs, KM_CSR_K_WRT_PEND); + if (ret) + return ret; + + writel(val, &d->regs->k_wd); + + return 0; +} + +static int ioc3aux_write(struct serio *dev, u8 val) +{ + struct ioc3kbd_data *d = dev->port_data; + int ret; + + ret = ioc3kbd_wait(d->regs, KM_CSR_M_WRT_PEND); + if (ret) + return ret; + + writel(val, &d->regs->m_wd); + + return 0; +} + +static irqreturn_t ioc3kbd_intr(int itq, void *dev_id) +{ + struct ioc3kbd_data *d = dev_id; + u32 data_k, data_m; + + data_k = readl(&d->regs->k_rd); + data_m = readl(&d->regs->m_rd); + + if (data_k & KM_RD_VALID_0) + serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_0_SHIFT) & 0xff, + 0); + if (data_k & KM_RD_VALID_1) + serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_1_SHIFT) & 0xff, + 0); + if (data_k & KM_RD_VALID_2) + serio_interrupt(d->kbd, (data_k >> KM_RD_DATA_2_SHIFT) & 0xff, + 0); + if (data_m & KM_RD_VALID_0) + serio_interrupt(d->aux, (data_m >> KM_RD_DATA_0_SHIFT) & 0xff, + 0); + if (data_m & KM_RD_VALID_1) + serio_interrupt(d->aux, (data_m >> KM_RD_DATA_1_SHIFT) & 0xff, + 0); + if (data_m & KM_RD_VALID_2) + serio_interrupt(d->aux, (data_m >> KM_RD_DATA_2_SHIFT) & 0xff, + 0); + + return IRQ_HANDLED; +} + +static int ioc3kbd_probe(struct platform_device *pdev) +{ + struct ioc3_serioregs __iomem *regs; + struct device *dev = &pdev->dev; + struct ioc3kbd_data *d; + struct serio *sk, *sa; + int irq, ret; + + regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(regs)) + return PTR_ERR(regs); + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return -ENXIO; + + d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL); + if (!d) + return -ENOMEM; + + sk = kzalloc(sizeof(*sk), GFP_KERNEL); + if (!sk) + return -ENOMEM; + + sa = kzalloc(sizeof(*sa), GFP_KERNEL); + if (!sa) { + kfree(sk); + return -ENOMEM; + } + + sk->id.type = SERIO_8042; + sk->write = ioc3kbd_write; + snprintf(sk->name, sizeof(sk->name), "IOC3 keyboard %d", pdev->id); + snprintf(sk->phys, sizeof(sk->phys), "ioc3/serio%dkbd", pdev->id); + sk->port_data = d; + sk->dev.parent = dev; + + sa->id.type = SERIO_8042; + sa->write = ioc3aux_write; + snprintf(sa->name, sizeof(sa->name), "IOC3 auxiliary %d", pdev->id); + snprintf(sa->phys, sizeof(sa->phys), "ioc3/serio%daux", pdev->id); + sa->port_data = d; + sa->dev.parent = dev; + + d->regs = regs; + d->kbd = sk; + d->aux = sa; + d->irq = irq; + + platform_set_drvdata(pdev, d); + serio_register_port(d->kbd); + serio_register_port(d->aux); + + ret = request_irq(irq, ioc3kbd_intr, IRQF_SHARED, "ioc3-kbd", d); + if (ret) { + dev_err(dev, "could not request IRQ %d\n", irq); + serio_unregister_port(d->kbd); + serio_unregister_port(d->aux); + return ret; + } + + /* enable ports */ + writel(KM_CSR_K_CLAMP_3 | KM_CSR_M_CLAMP_3, ®s->km_csr); + + return 0; +} + +static int ioc3kbd_remove(struct platform_device *pdev) +{ + struct ioc3kbd_data *d = platform_get_drvdata(pdev); + + free_irq(d->irq, d); + serio_unregister_port(d->kbd); + serio_unregister_port(d->aux); + return 0; +} + +static struct platform_driver ioc3kbd_driver = { + .probe = ioc3kbd_probe, + .remove = ioc3kbd_remove, + .driver = { + .name = "ioc3-kbd", + }, +}; +module_platform_driver(ioc3kbd_driver); + +MODULE_AUTHOR("Thomas Bogendoerfer "); +MODULE_DESCRIPTION("SGI IOC3 serio driver"); +MODULE_LICENSE("GPL");