From 25d8aa7d02d2919d9cae14c2c8db3fcc09420edd Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= Date: Thu, 27 Dec 2018 21:54:28 +0100 Subject: brcm47xx: add support for the kernel 4.19 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit One patch that wasn't ported due to a lot of conflict is: 901-Revert-bcma-switch-GPIO-portions-to-use-GPIOLIB_IRQC.patch Hopefully a correct/real fix will get developed before we switch brcm47xx to the 4.14. This IS NOT ready for switching/trying/using 4.19 yet due to some DMA regression affecting bgmac: [ 0.945472] bgmac_bcma bcma0:2: Found PHY addr: 25 [ 0.954565] libphy: bcma_mdio mii bus: probed [ 0.959486] ------------[ cut here ]------------ [ 0.964387] WARNING: CPU: 0 PID: 1 at ./include/linux/dma-mapping.h:516 bgmac_enet_probe+0x1b4/0x5c4 [ 0.973751] Modules linked in: [ 0.976913] CPU: 0 PID: 1 Comm: swapper Not tainted 4.19.9 #0 [ 0.982750] Stack : 804a0000 804597c4 00000000 00000000 80458fd8 8381bc2c 838282d4 80481a47 [ 0.991367] 8042e3ec 00000001 804d38f0 00000204 83980000 00000065 8381bbe0 6f55b24f [ 0.999975] 00000000 00000000 80520000 00002018 00000000 00000075 00000007 00000000 [ 1.008583] 00000000 80480000 000ee811 00000000 00000000 00000000 80432c00 80248db8 [ 1.017196] 00000009 00000204 83980000 803ad7b0 00000000 801feeec 00000000 804d0000 [ 1.025804] ... [ 1.028325] Call Trace: [ 1.030875] [<8000aef8>] show_stack+0x58/0x100 [ 1.035513] [<8001f8b4>] __warn+0xe4/0x118 [ 1.039708] [<8001f9a4>] warn_slowpath_null+0x48/0x64 [ 1.044935] [<80248db8>] bgmac_enet_probe+0x1b4/0x5c4 [ 1.050101] [<802498e0>] bgmac_probe+0x558/0x590 [ 1.054906] [<80252fd0>] bcma_device_probe+0x38/0x70 [ 1.060017] [<8020e1e8>] really_probe+0x170/0x2e8 [ 1.064891] [<8020e714>] __driver_attach+0xa4/0xec [ 1.069784] [<8020c1e0>] bus_for_each_dev+0x58/0xb0 [ 1.074833] [<8020d590>] bus_add_driver+0xf8/0x218 [ 1.079731] [<8020ef24>] driver_register+0xcc/0x11c [ 1.084804] [<804b54cc>] bgmac_init+0x1c/0x44 [ 1.089258] [<8000121c>] do_one_initcall+0x7c/0x1a0 [ 1.094343] [<804a1d34>] kernel_init_freeable+0x150/0x218 [ 1.099886] [<803a082c>] kernel_init+0x10/0x104 [ 1.104583] [<80005878>] ret_from_kernel_thread+0x14/0x1c [ 1.110107] ---[ end trace f441c0d873d1fb5b ]--- [ 1.114914] bgmac_bcma bcma0:2: Allocation of TX ring 0x200 failed [ 1.121215] bgmac_bcma bcma0:2: Unable to alloc memory for DMA [ 1.127626] bgmac_bcma: probe of bcma0:2 failed with error -12 [ 1.133838] bgmac_bcma: Broadcom 47xx GBit MAC driver loaded Signed-off-by: Rafał Miłecki --- .../brcm47xx/patches-4.19/831-old_gpio_wdt.patch | 360 +++++++++++++++++++++ 1 file changed, 360 insertions(+) create mode 100644 target/linux/brcm47xx/patches-4.19/831-old_gpio_wdt.patch (limited to 'target/linux/brcm47xx/patches-4.19/831-old_gpio_wdt.patch') diff --git a/target/linux/brcm47xx/patches-4.19/831-old_gpio_wdt.patch b/target/linux/brcm47xx/patches-4.19/831-old_gpio_wdt.patch new file mode 100644 index 0000000000..ddac7917ea --- /dev/null +++ b/target/linux/brcm47xx/patches-4.19/831-old_gpio_wdt.patch @@ -0,0 +1,360 @@ +This generic GPIO watchdog is used on Huawei E970 (brcm47xx) + +Signed-off-by: Mathias Adam + +--- a/drivers/watchdog/Kconfig ++++ b/drivers/watchdog/Kconfig +@@ -1497,6 +1497,15 @@ config WDT_MTX1 + Hardware driver for the MTX-1 boards. This is a watchdog timer that + will reboot the machine after a 100 seconds timer expired. + ++config GPIO_WDT ++ tristate "GPIO Hardware Watchdog" ++ help ++ Hardware driver for GPIO-controlled watchdogs. GPIO pin and ++ toggle interval settings are platform-specific. The driver ++ will stop toggling the GPIO (i.e. machine reboots) after a ++ 100 second timer expired and no process has written to ++ /dev/watchdog during that time. ++ + config PNX833X_WDT + tristate "PNX833x Hardware Watchdog" + depends on SOC_PNX8335 +--- a/drivers/watchdog/Makefile ++++ b/drivers/watchdog/Makefile +@@ -154,6 +154,7 @@ obj-$(CONFIG_RC32434_WDT) += rc32434_wdt + obj-$(CONFIG_INDYDOG) += indydog.o + obj-$(CONFIG_JZ4740_WDT) += jz4740_wdt.o + obj-$(CONFIG_WDT_MTX1) += mtx-1_wdt.o ++obj-$(CONFIG_GPIO_WDT) += old_gpio_wdt.o + obj-$(CONFIG_PNX833X_WDT) += pnx833x_wdt.o + obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o + obj-$(CONFIG_AR7_WDT) += ar7_wdt.o +--- /dev/null ++++ b/drivers/watchdog/old_gpio_wdt.c +@@ -0,0 +1,301 @@ ++/* ++ * Driver for GPIO-controlled Hardware Watchdogs. ++ * ++ * Copyright (C) 2013 Mathias Adam ++ * ++ * Replaces mtx1_wdt (driver for the MTX-1 Watchdog): ++ * ++ * (C) Copyright 2005 4G Systems , ++ * All Rights Reserved. ++ * http://www.4g-systems.biz ++ * ++ * (C) Copyright 2007 OpenWrt.org, Florian Fainelli ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * as published by the Free Software Foundation; either version ++ * 2 of the License, or (at your option) any later version. ++ * ++ * Neither Michael Stickel nor 4G Systems admit liability nor provide ++ * warranty for any of this software. This material is provided ++ * "AS-IS" and at no charge. ++ * ++ * (c) Copyright 2005 4G Systems ++ * ++ * Release 0.01. ++ * Author: Michael Stickel michael.stickel@4g-systems.biz ++ * ++ * Release 0.02. ++ * Author: Florian Fainelli florian@openwrt.org ++ * use the Linux watchdog/timer APIs ++ * ++ * Release 0.03. ++ * Author: Mathias Adam ++ * make it a generic gpio watchdog driver ++ * ++ * The Watchdog is configured to reset the MTX-1 ++ * if it is not triggered for 100 seconds. ++ * It should not be triggered more often than 1.6 seconds. ++ * ++ * A timer triggers the watchdog every 5 seconds, until ++ * it is opened for the first time. After the first open ++ * it MUST be triggered every 2..95 seconds. ++ */ ++ ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++#include ++ ++static int ticks = 100 * HZ; ++ ++static struct { ++ struct completion stop; ++ spinlock_t lock; ++ int running; ++ struct timer_list timer; ++ int queue; ++ int default_ticks; ++ unsigned long inuse; ++ unsigned gpio; ++ unsigned int gstate; ++ int interval; ++ int first_interval; ++} gpio_wdt_device; ++ ++static void gpio_wdt_trigger(unsigned long unused) ++{ ++ spin_lock(&gpio_wdt_device.lock); ++ if (gpio_wdt_device.running && ticks > 0) ++ ticks -= gpio_wdt_device.interval; ++ ++ /* toggle wdt gpio */ ++ gpio_wdt_device.gstate = !gpio_wdt_device.gstate; ++ gpio_set_value(gpio_wdt_device.gpio, gpio_wdt_device.gstate); ++ ++ if (gpio_wdt_device.queue && ticks > 0) ++ mod_timer(&gpio_wdt_device.timer, jiffies + gpio_wdt_device.interval); ++ else ++ complete(&gpio_wdt_device.stop); ++ spin_unlock(&gpio_wdt_device.lock); ++} ++ ++static void gpio_wdt_reset(void) ++{ ++ ticks = gpio_wdt_device.default_ticks; ++} ++ ++ ++static void gpio_wdt_start(void) ++{ ++ unsigned long flags; ++ ++ spin_lock_irqsave(&gpio_wdt_device.lock, flags); ++ if (!gpio_wdt_device.queue) { ++ gpio_wdt_device.queue = 1; ++ gpio_wdt_device.gstate = 1; ++ gpio_set_value(gpio_wdt_device.gpio, 1); ++ mod_timer(&gpio_wdt_device.timer, jiffies + gpio_wdt_device.first_interval); ++ } ++ gpio_wdt_device.running++; ++ spin_unlock_irqrestore(&gpio_wdt_device.lock, flags); ++} ++ ++static int gpio_wdt_stop(void) ++{ ++ unsigned long flags; ++ ++ spin_lock_irqsave(&gpio_wdt_device.lock, flags); ++ if (gpio_wdt_device.queue) { ++ gpio_wdt_device.queue = 0; ++ gpio_wdt_device.gstate = 0; ++ gpio_set_value(gpio_wdt_device.gpio, 0); ++ } ++ ticks = gpio_wdt_device.default_ticks; ++ spin_unlock_irqrestore(&gpio_wdt_device.lock, flags); ++ return 0; ++} ++ ++/* Filesystem functions */ ++ ++static int gpio_wdt_open(struct inode *inode, struct file *file) ++{ ++ if (test_and_set_bit(0, &gpio_wdt_device.inuse)) ++ return -EBUSY; ++ return nonseekable_open(inode, file); ++} ++ ++ ++static int gpio_wdt_release(struct inode *inode, struct file *file) ++{ ++ clear_bit(0, &gpio_wdt_device.inuse); ++ return 0; ++} ++ ++static long gpio_wdt_ioctl(struct file *file, unsigned int cmd, ++ unsigned long arg) ++{ ++ void __user *argp = (void __user *)arg; ++ int __user *p = (int __user *)argp; ++ unsigned int value; ++ static const struct watchdog_info ident = { ++ .options = WDIOF_CARDRESET, ++ .identity = "GPIO WDT", ++ }; ++ ++ switch (cmd) { ++ case WDIOC_GETSUPPORT: ++ if (copy_to_user(argp, &ident, sizeof(ident))) ++ return -EFAULT; ++ break; ++ case WDIOC_GETSTATUS: ++ case WDIOC_GETBOOTSTATUS: ++ put_user(0, p); ++ break; ++ case WDIOC_SETOPTIONS: ++ if (get_user(value, p)) ++ return -EFAULT; ++ if (value & WDIOS_ENABLECARD) ++ gpio_wdt_start(); ++ else if (value & WDIOS_DISABLECARD) ++ gpio_wdt_stop(); ++ else ++ return -EINVAL; ++ return 0; ++ case WDIOC_KEEPALIVE: ++ gpio_wdt_reset(); ++ break; ++ default: ++ return -ENOTTY; ++ } ++ return 0; ++} ++ ++ ++static ssize_t gpio_wdt_write(struct file *file, const char *buf, ++ size_t count, loff_t *ppos) ++{ ++ if (!count) ++ return -EIO; ++ gpio_wdt_reset(); ++ return count; ++} ++ ++static const struct file_operations gpio_wdt_fops = { ++ .owner = THIS_MODULE, ++ .llseek = no_llseek, ++ .unlocked_ioctl = gpio_wdt_ioctl, ++ .open = gpio_wdt_open, ++ .write = gpio_wdt_write, ++ .release = gpio_wdt_release, ++}; ++ ++ ++static struct miscdevice gpio_wdt_misc = { ++ .minor = WATCHDOG_MINOR, ++ .name = "watchdog", ++ .fops = &gpio_wdt_fops, ++}; ++ ++ ++static int gpio_wdt_probe(struct platform_device *pdev) ++{ ++ int ret; ++ struct gpio_wdt_platform_data *gpio_wdt_data = pdev->dev.platform_data; ++ ++ gpio_wdt_device.gpio = gpio_wdt_data->gpio; ++ gpio_wdt_device.interval = gpio_wdt_data->interval; ++ gpio_wdt_device.first_interval = gpio_wdt_data->first_interval; ++ if (gpio_wdt_device.first_interval <= 0) { ++ gpio_wdt_device.first_interval = gpio_wdt_device.interval; ++ } ++ ++ ret = gpio_request(gpio_wdt_device.gpio, "gpio-wdt"); ++ if (ret < 0) { ++ dev_err(&pdev->dev, "failed to request gpio"); ++ return ret; ++ } ++ ++ spin_lock_init(&gpio_wdt_device.lock); ++ init_completion(&gpio_wdt_device.stop); ++ gpio_wdt_device.queue = 0; ++ clear_bit(0, &gpio_wdt_device.inuse); ++ setup_timer(&gpio_wdt_device.timer, gpio_wdt_trigger, 0L); ++ gpio_wdt_device.default_ticks = ticks; ++ ++ gpio_wdt_start(); ++ dev_info(&pdev->dev, "GPIO Hardware Watchdog driver (gpio=%i interval=%i/%i)\n", ++ gpio_wdt_data->gpio, gpio_wdt_data->first_interval, gpio_wdt_data->interval); ++ return 0; ++} ++ ++static int gpio_wdt_remove(struct platform_device *pdev) ++{ ++ /* FIXME: do we need to lock this test ? */ ++ if (gpio_wdt_device.queue) { ++ gpio_wdt_device.queue = 0; ++ wait_for_completion(&gpio_wdt_device.stop); ++ } ++ ++ gpio_free(gpio_wdt_device.gpio); ++ misc_deregister(&gpio_wdt_misc); ++ return 0; ++} ++ ++static struct platform_driver gpio_wdt_driver = { ++ .probe = gpio_wdt_probe, ++ .remove = gpio_wdt_remove, ++ .driver.name = "gpio-wdt", ++ .driver.owner = THIS_MODULE, ++}; ++ ++static int __init gpio_wdt_init(void) ++{ ++ return platform_driver_register(&gpio_wdt_driver); ++} ++arch_initcall(gpio_wdt_init); ++ ++/* ++ * We do wdt initialization in two steps: arch_initcall probes the wdt ++ * very early to start pinging the watchdog (misc devices are not yet ++ * available), and later module_init() just registers the misc device. ++ */ ++static int gpio_wdt_init_late(void) ++{ ++ int ret; ++ ++ ret = misc_register(&gpio_wdt_misc); ++ if (ret < 0) { ++ pr_err("GPIO_WDT: failed to register misc device\n"); ++ return ret; ++ } ++ return 0; ++} ++#ifndef MODULE ++module_init(gpio_wdt_init_late); ++#endif ++ ++static void __exit gpio_wdt_exit(void) ++{ ++ platform_driver_unregister(&gpio_wdt_driver); ++} ++module_exit(gpio_wdt_exit); ++ ++MODULE_AUTHOR("Michael Stickel, Florian Fainelli, Mathias Adam"); ++MODULE_DESCRIPTION("Driver for GPIO hardware watchdogs"); ++MODULE_LICENSE("GPL"); ++MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR); ++MODULE_ALIAS("platform:gpio-wdt"); +--- /dev/null ++++ b/include/linux/old_gpio_wdt.h +@@ -0,0 +1,21 @@ ++/* ++ * Definitions for the GPIO watchdog driver ++ * ++ * Copyright (C) 2013 Mathias Adam ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ * ++ */ ++ ++#ifndef _GPIO_WDT_H_ ++#define _GPIO_WDT_H_ ++ ++struct gpio_wdt_platform_data { ++ int gpio; /* GPIO line number */ ++ int interval; /* watchdog reset interval in system ticks */ ++ int first_interval; /* first wd reset interval in system ticks */ ++}; ++ ++#endif /* _GPIO_WDT_H_ */ -- cgit v1.2.3