From patchwork Fri Nov 26 14:10:25 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Henning Schild X-Patchwork-Id: 517793 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 7A309C43217 for ; Fri, 26 Nov 2021 14:13:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377742AbhKZOQO (ORCPT ); Fri, 26 Nov 2021 09:16:14 -0500 Received: from thoth.sbs.de ([192.35.17.2]:47657 "EHLO thoth.sbs.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377704AbhKZOOL (ORCPT ); Fri, 26 Nov 2021 09:14:11 -0500 Received: from mail2.sbs.de (mail2.sbs.de [192.129.41.66]) by thoth.sbs.de (8.15.2/8.15.2) with ESMTPS id 1AQEAWjK018587 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 26 Nov 2021 15:10:32 +0100 Received: from localhost.localdomain ([139.22.47.90]) by mail2.sbs.de (8.15.2/8.15.2) with ESMTP id 1AQEAUXH030519; Fri, 26 Nov 2021 15:10:32 +0100 From: Henning Schild To: linux-kernel@vger.kernel.org, linux-leds@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-watchdog@vger.kernel.org Cc: Srikanth Krishnakar , Jan Kiszka , Henning Schild , Gerd Haeussler , Guenter Roeck , Wim Van Sebroeck , Mark Gross , Hans de Goede , Pavel Machek , Andy Shevchenko , Enrico Weigelt Subject: [PATCH v4 2/4] leds: simatic-ipc-leds: add new driver for Siemens Industial PCs Date: Fri, 26 Nov 2021 15:10:25 +0100 Message-Id: <20211126141027.16161-3-henning.schild@siemens.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211126141027.16161-1-henning.schild@siemens.com> References: <20211126141027.16161-1-henning.schild@siemens.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@vger.kernel.org This driver adds initial support for several devices from Siemens. It is based on a platform driver introduced in an earlier commit. Signed-off-by: Henning Schild --- drivers/leds/Kconfig | 3 + drivers/leds/Makefile | 3 + drivers/leds/simple/Kconfig | 11 ++ drivers/leds/simple/Makefile | 2 + drivers/leds/simple/simatic-ipc-leds.c | 202 +++++++++++++++++++++++++ 5 files changed, 221 insertions(+) create mode 100644 drivers/leds/simple/Kconfig create mode 100644 drivers/leds/simple/Makefile create mode 100644 drivers/leds/simple/simatic-ipc-leds.c diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig index ed800f5da7d8..ac6688d7a3f4 100644 --- a/drivers/leds/Kconfig +++ b/drivers/leds/Kconfig @@ -879,4 +879,7 @@ source "drivers/leds/flash/Kconfig" comment "LED Triggers" source "drivers/leds/trigger/Kconfig" +comment "Simple LED drivers" +source "drivers/leds/simple/Kconfig" + endif # NEW_LEDS diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile index c636ec069612..1a719caf14c0 100644 --- a/drivers/leds/Makefile +++ b/drivers/leds/Makefile @@ -105,3 +105,6 @@ obj-$(CONFIG_LEDS_TRIGGERS) += trigger/ # LED Blink obj-y += blink/ + +# Simple LED drivers +obj-y += simple/ diff --git a/drivers/leds/simple/Kconfig b/drivers/leds/simple/Kconfig new file mode 100644 index 000000000000..9f6a68336659 --- /dev/null +++ b/drivers/leds/simple/Kconfig @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0-only +config LEDS_SIEMENS_SIMATIC_IPC + tristate "LED driver for Siemens Simatic IPCs" + depends on LEDS_CLASS + depends on SIEMENS_SIMATIC_IPC + help + This option enables support for the LEDs of several Industrial PCs + from Siemens. + + To compile this driver as a module, choose M here: the module + will be called simatic-ipc-leds. diff --git a/drivers/leds/simple/Makefile b/drivers/leds/simple/Makefile new file mode 100644 index 000000000000..8481f1e9e360 --- /dev/null +++ b/drivers/leds/simple/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_LEDS_SIEMENS_SIMATIC_IPC) += simatic-ipc-leds.o diff --git a/drivers/leds/simple/simatic-ipc-leds.c b/drivers/leds/simple/simatic-ipc-leds.c new file mode 100644 index 000000000000..ff2c96e73241 --- /dev/null +++ b/drivers/leds/simple/simatic-ipc-leds.c @@ -0,0 +1,202 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Siemens SIMATIC IPC driver for LEDs + * + * Copyright (c) Siemens AG, 2018-2021 + * + * Authors: + * Henning Schild + * Jan Kiszka + * Gerd Haeussler + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define SIMATIC_IPC_LED_PORT_BASE 0x404E + +struct simatic_ipc_led { + unsigned int value; /* mask for io and offset for mem */ + char *name; + struct led_classdev cdev; +}; + +static struct simatic_ipc_led simatic_ipc_leds_io[] = { + {1 << 15, "green:" LED_FUNCTION_STATUS "-1" }, + {1 << 7, "yellow:" LED_FUNCTION_STATUS "-1" }, + {1 << 14, "red:" LED_FUNCTION_STATUS "-2" }, + {1 << 6, "yellow:" LED_FUNCTION_STATUS "-2" }, + {1 << 13, "red:" LED_FUNCTION_STATUS "-3" }, + {1 << 5, "yellow:" LED_FUNCTION_STATUS "-3" }, + { } +}; + +/* the actual start will be discovered with PCI, 0 is a placeholder */ +struct resource simatic_ipc_led_mem_res = DEFINE_RES_MEM_NAMED(0, SZ_4K, KBUILD_MODNAME); + +static void *simatic_ipc_led_memory; + +static struct simatic_ipc_led simatic_ipc_leds_mem[] = { + {0x500 + 0x1A0, "red:" LED_FUNCTION_STATUS "-1"}, + {0x500 + 0x1A8, "green:" LED_FUNCTION_STATUS "-1"}, + {0x500 + 0x1C8, "red:" LED_FUNCTION_STATUS "-2"}, + {0x500 + 0x1D0, "green:" LED_FUNCTION_STATUS "-2"}, + {0x500 + 0x1E0, "red:" LED_FUNCTION_STATUS "-3"}, + {0x500 + 0x198, "green:" LED_FUNCTION_STATUS "-3"}, + { } +}; + +static struct resource simatic_ipc_led_io_res = + DEFINE_RES_IO_NAMED(SIMATIC_IPC_LED_PORT_BASE, SZ_2, KBUILD_MODNAME); + +static DEFINE_SPINLOCK(reg_lock); + +static inline struct simatic_ipc_led *cdev_to_led(struct led_classdev *led_cd) +{ + return container_of(led_cd, struct simatic_ipc_led, cdev); +} + +static void simatic_ipc_led_set_io(struct led_classdev *led_cd, + enum led_brightness brightness) +{ + struct simatic_ipc_led *led = cdev_to_led(led_cd); + unsigned long flags; + unsigned int val; + + spin_lock_irqsave(®_lock, flags); + + val = inw(SIMATIC_IPC_LED_PORT_BASE); + if (brightness == LED_OFF) + outw(val | led->value, SIMATIC_IPC_LED_PORT_BASE); + else + outw(val & ~led->value, SIMATIC_IPC_LED_PORT_BASE); + + spin_unlock_irqrestore(®_lock, flags); +} + +static enum led_brightness simatic_ipc_led_get_io(struct led_classdev *led_cd) +{ + struct simatic_ipc_led *led = cdev_to_led(led_cd); + + return inw(SIMATIC_IPC_LED_PORT_BASE) & led->value ? LED_OFF : led_cd->max_brightness; +} + +static void simatic_ipc_led_set_mem(struct led_classdev *led_cd, + enum led_brightness brightness) +{ + struct simatic_ipc_led *led = cdev_to_led(led_cd); + + u32 *p; + + p = simatic_ipc_led_memory + led->value; + *p = (*p & ~1) | (brightness == LED_OFF); +} + +static enum led_brightness simatic_ipc_led_get_mem(struct led_classdev *led_cd) +{ + struct simatic_ipc_led *led = cdev_to_led(led_cd); + + u32 *p; + + p = simatic_ipc_led_memory + led->value; + return (*p & 1) ? LED_OFF : led_cd->max_brightness; +} + +static int simatic_ipc_leds_probe(struct platform_device *pdev) +{ + const struct simatic_ipc_platform *plat = pdev->dev.platform_data; + struct device *dev = &pdev->dev; + struct simatic_ipc_led *ipcled; + struct led_classdev *cdev; + struct resource *res; + int err, type; + u32 *p; + + switch (plat->devmode) { + case SIMATIC_IPC_DEVICE_227D: + case SIMATIC_IPC_DEVICE_427E: + res = &simatic_ipc_led_io_res; + ipcled = simatic_ipc_leds_io; + /* on 227D the two bytes work the other way araound */ + if (plat->devmode == SIMATIC_IPC_DEVICE_227D) { + while (ipcled->value) { + ipcled->value = swab16(ipcled->value); + ipcled++; + } + ipcled = simatic_ipc_leds_io; + } + type = IORESOURCE_IO; + if (!devm_request_region(dev, res->start, resource_size(res), KBUILD_MODNAME)) { + dev_err(dev, "Unable to register IO resource at %pR\n", res); + return -EBUSY; + } + break; + case SIMATIC_IPC_DEVICE_127E: + res = &simatic_ipc_led_mem_res; + ipcled = simatic_ipc_leds_mem; + type = IORESOURCE_MEM; + + /* get GPIO base from PCI */ + res->start = simatic_ipc_get_membase0(PCI_DEVFN(13, 0)); + if (res->start == 0) + return -ENODEV; + + /* do the final address calculation */ + res->start = res->start + (0xC5 << 16); + res->end += res->start; + + simatic_ipc_led_memory = devm_ioremap_resource(dev, res); + if (IS_ERR(simatic_ipc_led_memory)) + return PTR_ERR(simatic_ipc_led_memory); + + /* initialize power/watchdog LED */ + p = simatic_ipc_led_memory + 0x500 + 0x1D8; /* PM_WDT_OUT */ + *p = (*p & ~1); + p = simatic_ipc_led_memory + 0x500 + 0x1C0; /* PM_BIOS_BOOT_N */ + *p = (*p | 1); + + break; + default: + return -ENODEV; + } + + while (ipcled->value) { + cdev = &ipcled->cdev; + if (type == IORESOURCE_MEM) { + cdev->brightness_set = simatic_ipc_led_set_mem; + cdev->brightness_get = simatic_ipc_led_get_mem; + } else { + cdev->brightness_set = simatic_ipc_led_set_io; + cdev->brightness_get = simatic_ipc_led_get_io; + } + cdev->max_brightness = LED_ON; + cdev->name = ipcled->name; + + err = devm_led_classdev_register(dev, cdev); + if (err < 0) + return err; + ipcled++; + } + + return 0; +} + +static struct platform_driver simatic_ipc_led_driver = { + .probe = simatic_ipc_leds_probe, + .driver = { + .name = KBUILD_MODNAME, + } +}; + +module_platform_driver(simatic_ipc_led_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" KBUILD_MODNAME); +MODULE_AUTHOR("Henning Schild ");