151 lines
4.1 KiB
C
151 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Siemens SIMATIC IPC platform driver
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*
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* Copyright (c) Siemens AG, 2018-2021
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*
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* Authors:
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* Henning Schild <henning.schild@siemens.com>
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* Jan Kiszka <jan.kiszka@siemens.com>
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* Gerd Haeussler <gerd.haeussler.ext@siemens.com>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/dmi.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/platform_data/x86/simatic-ipc.h>
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#include <linux/platform_device.h>
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static struct platform_device *ipc_led_platform_device;
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static struct platform_device *ipc_wdt_platform_device;
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static const struct dmi_system_id simatic_ipc_whitelist[] = {
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{
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.matches = {
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DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"),
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},
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},
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{}
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};
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static struct simatic_ipc_platform platform_data;
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static struct {
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u32 station_id;
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u8 led_mode;
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u8 wdt_mode;
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} device_modes[] = {
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{SIMATIC_IPC_IPC127E, SIMATIC_IPC_DEVICE_127E, SIMATIC_IPC_DEVICE_NONE},
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{SIMATIC_IPC_IPC227D, SIMATIC_IPC_DEVICE_227D, SIMATIC_IPC_DEVICE_NONE},
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{SIMATIC_IPC_IPC227E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_227E},
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{SIMATIC_IPC_IPC227G, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G},
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{SIMATIC_IPC_IPC277E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227E},
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{SIMATIC_IPC_IPC427D, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE},
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{SIMATIC_IPC_IPC427E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_427E},
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{SIMATIC_IPC_IPC477E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_427E},
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{SIMATIC_IPC_IPCBX_39A, SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_227G},
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{SIMATIC_IPC_IPCPX_39A, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G},
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};
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static int register_platform_devices(u32 station_id)
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{
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u8 ledmode = SIMATIC_IPC_DEVICE_NONE;
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u8 wdtmode = SIMATIC_IPC_DEVICE_NONE;
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char *pdevname = KBUILD_MODNAME "_leds";
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int i;
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platform_data.devmode = SIMATIC_IPC_DEVICE_NONE;
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for (i = 0; i < ARRAY_SIZE(device_modes); i++) {
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if (device_modes[i].station_id == station_id) {
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ledmode = device_modes[i].led_mode;
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wdtmode = device_modes[i].wdt_mode;
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break;
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}
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}
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if (ledmode != SIMATIC_IPC_DEVICE_NONE) {
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if (ledmode == SIMATIC_IPC_DEVICE_127E ||
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ledmode == SIMATIC_IPC_DEVICE_227G)
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pdevname = KBUILD_MODNAME "_leds_gpio";
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platform_data.devmode = ledmode;
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ipc_led_platform_device =
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platform_device_register_data(NULL,
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pdevname, PLATFORM_DEVID_NONE,
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&platform_data,
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sizeof(struct simatic_ipc_platform));
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if (IS_ERR(ipc_led_platform_device))
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return PTR_ERR(ipc_led_platform_device);
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pr_debug("device=%s created\n",
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ipc_led_platform_device->name);
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}
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if (wdtmode == SIMATIC_IPC_DEVICE_227G) {
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request_module("w83627hf_wdt");
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return 0;
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}
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if (wdtmode != SIMATIC_IPC_DEVICE_NONE) {
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platform_data.devmode = wdtmode;
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ipc_wdt_platform_device =
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platform_device_register_data(NULL,
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KBUILD_MODNAME "_wdt", PLATFORM_DEVID_NONE,
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&platform_data,
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sizeof(struct simatic_ipc_platform));
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if (IS_ERR(ipc_wdt_platform_device))
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return PTR_ERR(ipc_wdt_platform_device);
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pr_debug("device=%s created\n",
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ipc_wdt_platform_device->name);
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}
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if (ledmode == SIMATIC_IPC_DEVICE_NONE &&
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wdtmode == SIMATIC_IPC_DEVICE_NONE) {
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pr_warn("unsupported IPC detected, station id=%08x\n",
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station_id);
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return -EINVAL;
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}
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return 0;
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}
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static int __init simatic_ipc_init_module(void)
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{
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const struct dmi_system_id *match;
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u32 station_id;
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int err;
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match = dmi_first_match(simatic_ipc_whitelist);
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if (!match)
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return 0;
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err = dmi_walk(simatic_ipc_find_dmi_entry_helper, &station_id);
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if (err || station_id == SIMATIC_IPC_INVALID_STATION_ID) {
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pr_warn("DMI entry %d not found\n", SIMATIC_IPC_DMI_ENTRY_OEM);
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return 0;
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}
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return register_platform_devices(station_id);
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}
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static void __exit simatic_ipc_exit_module(void)
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{
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platform_device_unregister(ipc_led_platform_device);
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ipc_led_platform_device = NULL;
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platform_device_unregister(ipc_wdt_platform_device);
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ipc_wdt_platform_device = NULL;
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}
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module_init(simatic_ipc_init_module);
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module_exit(simatic_ipc_exit_module);
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MODULE_LICENSE("GPL v2");
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MODULE_AUTHOR("Gerd Haeussler <gerd.haeussler.ext@siemens.com>");
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MODULE_ALIAS("dmi:*:svnSIEMENSAG:*");
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