diff options
Diffstat (limited to 'drivers/platform/x86/simatic-ipc.c')
| -rw-r--r-- | drivers/platform/x86/simatic-ipc.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/drivers/platform/x86/simatic-ipc.c b/drivers/platform/x86/simatic-ipc.c deleted file mode 100644 index b599cda5ba3c..000000000000 --- a/drivers/platform/x86/simatic-ipc.c +++ /dev/null @@ -1,176 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Siemens SIMATIC IPC platform driver - * - * Copyright (c) Siemens AG, 2018-2021 - * - * 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/pci.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 const struct dmi_system_id simatic_ipc_whitelist[] = { - { - .matches = { - DMI_MATCH(DMI_SYS_VENDOR, "SIEMENS AG"), - }, - }, - {} -}; - -static struct simatic_ipc_platform platform_data; - -static struct { - u32 station_id; - u8 led_mode; - u8 wdt_mode; -} device_modes[] = { - {SIMATIC_IPC_IPC127E, SIMATIC_IPC_DEVICE_127E, SIMATIC_IPC_DEVICE_NONE}, - {SIMATIC_IPC_IPC227D, SIMATIC_IPC_DEVICE_227D, SIMATIC_IPC_DEVICE_NONE}, - {SIMATIC_IPC_IPC227E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_227E}, - {SIMATIC_IPC_IPC277E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_227E}, - {SIMATIC_IPC_IPC427D, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_NONE}, - {SIMATIC_IPC_IPC427E, SIMATIC_IPC_DEVICE_427E, SIMATIC_IPC_DEVICE_427E}, - {SIMATIC_IPC_IPC477E, SIMATIC_IPC_DEVICE_NONE, SIMATIC_IPC_DEVICE_427E}, -}; - -static int register_platform_devices(u32 station_id) -{ - u8 ledmode = SIMATIC_IPC_DEVICE_NONE; - u8 wdtmode = SIMATIC_IPC_DEVICE_NONE; - int i; - - platform_data.devmode = SIMATIC_IPC_DEVICE_NONE; - - 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; - break; - } - } - - if (ledmode != SIMATIC_IPC_DEVICE_NONE) { - platform_data.devmode = ledmode; - ipc_led_platform_device = - platform_device_register_data(NULL, - KBUILD_MODNAME "_leds", 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) { - pr_warn("unsupported IPC detected, station id=%08x\n", - station_id); - return -EINVAL; - } - - return 0; -} - -/* FIXME: this should eventually be done with generic P2SB discovery code - * the individual drivers for watchdogs and LEDs access memory that implements - * GPIO, but pinctrl will not come up because of missing ACPI entries - * - * While there is no conflict a cleaner solution would be to somehow bring up - * pinctrl even with these ACPI entries missing, and base the drivers on pinctrl. - * After which the following function could be dropped, together with the code - * poking the memory. - */ -/* - * Get membase address from PCI, used in leds and wdt module. Here we read - * the bar0. The final address calculation is done in the appropriate modules - */ -u32 simatic_ipc_get_membase0(unsigned int p2sb) -{ - struct pci_bus *bus; - u32 bar0 = 0; - /* - * The GPIO memory is in bar0 of the hidden P2SB device. - * Unhide the device to have a quick look at it, before we hide it - * again. - * Also grab the pci rescan lock so that device does not get discovered - * and remapped while it is visible. - * This code is inspired by drivers/mfd/lpc_ich.c - */ - bus = pci_find_bus(0, 0); - pci_lock_rescan_remove(); - pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x0); - pci_bus_read_config_dword(bus, p2sb, PCI_BASE_ADDRESS_0, &bar0); - - bar0 &= ~0xf; - pci_bus_write_config_byte(bus, p2sb, 0xE1, 0x1); - pci_unlock_rescan_remove(); - - return bar0; -} -EXPORT_SYMBOL(simatic_ipc_get_membase0); - -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; - } - - 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; -} - -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:*"); |