diff options
Diffstat (limited to 'drivers/platform/x86/siemens/simatic-ipc.c')
| -rw-r--r-- | drivers/platform/x86/siemens/simatic-ipc.c | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/drivers/platform/x86/siemens/simatic-ipc.c b/drivers/platform/x86/siemens/simatic-ipc.c new file mode 100644 index 0000000000..8ca6e277fa --- /dev/null +++ b/drivers/platform/x86/siemens/simatic-ipc.c @@ -0,0 +1,236 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Siemens SIMATIC IPC platform driver + * + * Copyright (c) Siemens AG, 2018-2023 + * + * Authors: + * Henning Schild <henning.schild@siemens.com> + * Jan Kiszka <jan.kiszka@siemens.com> + * Gerd Haeussler <gerd.haeussler.ext@siemens.com> + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/dmi.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_data/x86/simatic-ipc.h> +#include <linux/platform_device.h> + +static struct platform_device *ipc_led_platform_device; +static struct platform_device *ipc_wdt_platform_device; +static struct platform_device *ipc_batt_platform_device; + +static const struct dmi_system_id simatic_ipc_whitelist[] = { + { + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"), + }, + }, + {} +}; + +static struct simatic_ipc_platform platform_data; + +#define SIMATIC_IPC_MAX_EXTRA_MODULES 2 + +static struct { + u32 station_id; + u8 led_mode; + u8 wdt_mode; + u8 batt_mode; + char *extra_modules[SIMATIC_IPC_MAX_EXTRA_MODULES]; +} device_modes[] = { + {SIMATIC_IPC_IPC127E, + SIMATIC_IPC_DEVICE_127E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_127E, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC227D, + SIMATIC_IPC_DEVICE_227D, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC227E, + SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_227E, SIMATIC_IPC_DEVICE_227E, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC227G, + SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G, + { "nct6775", "w83627hf_wdt" }}, + {SIMATIC_IPC_IPC277G, + SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227G, + { "nct6775", "w83627hf_wdt" }}, + {SIMATIC_IPC_IPC277E, + SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227E, SIMATIC_IPC_DEVICE_227E, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC427D, + SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC427E, + SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPC477E, + SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPCBX_39A, + SIMATIC_IPC_DEVICE_227G, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_39A, + { "nct6775", "w83627hf_wdt" }}, + {SIMATIC_IPC_IPCPX_39A, + SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_39A, + { "nct6775", "w83627hf_wdt" }}, + {SIMATIC_IPC_IPCBX_21A, + SIMATIC_IPC_DEVICE_BX_21A, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_21A, + { "emc1403", NULL }}, + {SIMATIC_IPC_IPCBX_56A, + SIMATIC_IPC_DEVICE_BX_59A, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_59A, + { "emc1403", "w83627hf_wdt" }}, + {SIMATIC_IPC_IPCBX_59A, + SIMATIC_IPC_DEVICE_BX_59A, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_BX_59A, + { "emc1403", "w83627hf_wdt" }}, +}; + +static int register_platform_devices(u32 station_id) +{ + u8 ledmode = SIMATIC_IPC_DEVICE_NONE; + u8 wdtmode = SIMATIC_IPC_DEVICE_NONE; + u8 battmode = SIMATIC_IPC_DEVICE_NONE; + char *pdevname; + int i; + + for (i = 0; i < ARRAY_SIZE(device_modes); i++) { + if (device_modes[i].station_id == station_id) { + ledmode = device_modes[i].led_mode; + wdtmode = device_modes[i].wdt_mode; + battmode = device_modes[i].batt_mode; + break; + } + } + + if (battmode != SIMATIC_IPC_DEVICE_NONE) { + pdevname = KBUILD_MODNAME "_batt"; + if (battmode == SIMATIC_IPC_DEVICE_127E) + pdevname = KBUILD_MODNAME "_batt_apollolake"; + if (battmode == SIMATIC_IPC_DEVICE_BX_21A) + pdevname = KBUILD_MODNAME "_batt_elkhartlake"; + if (battmode == SIMATIC_IPC_DEVICE_227G || + battmode == SIMATIC_IPC_DEVICE_BX_39A || + battmode == SIMATIC_IPC_DEVICE_BX_59A) + pdevname = KBUILD_MODNAME "_batt_f7188x"; + platform_data.devmode = battmode; + ipc_batt_platform_device = + platform_device_register_data(NULL, pdevname, + PLATFORM_DEVID_NONE, &platform_data, + sizeof(struct simatic_ipc_platform)); + if (IS_ERR(ipc_batt_platform_device)) + return PTR_ERR(ipc_batt_platform_device); + + pr_debug("device=%s created\n", + ipc_batt_platform_device->name); + } + + if (ledmode != SIMATIC_IPC_DEVICE_NONE) { + pdevname = KBUILD_MODNAME "_leds"; + if (ledmode == SIMATIC_IPC_DEVICE_127E) + pdevname = KBUILD_MODNAME "_leds_gpio_apollolake"; + if (ledmode == SIMATIC_IPC_DEVICE_227G || ledmode == SIMATIC_IPC_DEVICE_BX_59A) + pdevname = KBUILD_MODNAME "_leds_gpio_f7188x"; + if (ledmode == SIMATIC_IPC_DEVICE_BX_21A) + pdevname = KBUILD_MODNAME "_leds_gpio_elkhartlake"; + platform_data.devmode = ledmode; + ipc_led_platform_device = + platform_device_register_data(NULL, + pdevname, PLATFORM_DEVID_NONE, + &platform_data, + sizeof(struct simatic_ipc_platform)); + if (IS_ERR(ipc_led_platform_device)) + return PTR_ERR(ipc_led_platform_device); + + pr_debug("device=%s created\n", + ipc_led_platform_device->name); + } + + if (wdtmode != SIMATIC_IPC_DEVICE_NONE) { + platform_data.devmode = wdtmode; + ipc_wdt_platform_device = + platform_device_register_data(NULL, + KBUILD_MODNAME "_wdt", PLATFORM_DEVID_NONE, + &platform_data, + sizeof(struct simatic_ipc_platform)); + if (IS_ERR(ipc_wdt_platform_device)) + return PTR_ERR(ipc_wdt_platform_device); + + pr_debug("device=%s created\n", + ipc_wdt_platform_device->name); + } + + if (ledmode == SIMATIC_IPC_DEVICE_NONE && + wdtmode == SIMATIC_IPC_DEVICE_NONE && + battmode == SIMATIC_IPC_DEVICE_NONE) { + pr_warn("unsupported IPC detected, station id=%08x\n", + station_id); + return -EINVAL; + } + + return 0; +} + +static void request_additional_modules(u32 station_id) +{ + char **extra_modules = NULL; + int i; + + for (i = 0; i < ARRAY_SIZE(device_modes); i++) { + if (device_modes[i].station_id == station_id) { + extra_modules = device_modes[i].extra_modules; + break; + } + } + + if (!extra_modules) + return; + + for (i = 0; i < SIMATIC_IPC_MAX_EXTRA_MODULES; i++) { + if (extra_modules[i]) + request_module(extra_modules[i]); + else + break; + } +} + +static int __init simatic_ipc_init_module(void) +{ + const struct dmi_system_id *match; + u32 station_id; + int err; + + match = dmi_first_match(simatic_ipc_whitelist); + if (!match) + return 0; + + err = dmi_walk(simatic_ipc_find_dmi_entry_helper, &station_id); + + if (err || station_id == SIMATIC_IPC_INVALID_STATION_ID) { + pr_warn("DMI entry %d not found\n", SIMATIC_IPC_DMI_ENTRY_OEM); + return 0; + } + + request_additional_modules(station_id); + + return register_platform_devices(station_id); +} + +static void __exit simatic_ipc_exit_module(void) +{ + platform_device_unregister(ipc_led_platform_device); + ipc_led_platform_device = NULL; + + platform_device_unregister(ipc_wdt_platform_device); + ipc_wdt_platform_device = NULL; + + platform_device_unregister(ipc_batt_platform_device); + ipc_batt_platform_device = NULL; +} + +module_init(simatic_ipc_init_module); +module_exit(simatic_ipc_exit_module); + +MODULE_LICENSE("GPL v2"); +MODULE_AUTHOR("Gerd Haeussler <gerd.haeussler.ext@siemens.com>"); +MODULE_ALIAS("dmi:*:svnSIEMENSAG:*"); |