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f5919b65d4
Patch generation process: - rebase rpi/rpi-4.14.y on v4.14.89 from linux-stable - git format-patch v4.14.89 Patches skipped during rebase: - lan78xx: Read MAC address from DT if present - lan78xx: Enable LEDs and auto-negotiation - Revert "softirq: Let ksoftirqd do its job" - sc16is7xx: Fix for multi-channel stall - lan78xx: Ignore DT MAC address if already valid - lan78xx: Simple patch to prevent some crashes - tcp_write_queue_purge clears all the SKBs in the write queue - Revert "lan78xx: Simple patch to prevent some crashes" - lan78xx: Connect phy early - Arm: mm: ftrace: Only set text back to ro after kernel has been marked ro - Revert "Revert "softirq: Let ksoftirqd do its job"" - ASoC: cs4265: SOC_SINGLE register value error fix - Revert "ASoC: cs4265: SOC_SINGLE register value error fix" - Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends" - Revert "Revert "net: pskb_trim_rcsum() and CHECKSUM_COMPLETE are friends"" Patches dropped after rebase: - net: Add non-mainline source for rtl8192cu wlan - net: Fix rtl8192cu build errors on other platforms - brcm: adds support for BCM43341 wifi - brcmfmac: Mute expected startup 'errors' - ARM64: Fix build break for RTL8187/RTL8192CU wifi - ARM64: Enable RTL8187/RTL8192CU wifi in build config - This is the driver for Sony CXD2880 DVB-T2/T tuner + demodulator - brcmfmac: add CLM download support - brcmfmac: request_firmware_direct is quieter - Sets the BCDC priority to constant 0 - brcmfmac: Disable ARP offloading when promiscuous - brcmfmac: Avoid possible out-of-bounds read - brcmfmac: Delete redundant length check - net: rtl8192cu: Normalize indentation - net: rtl8192cu: Fix implicit fallthrough warnings - Revert "Sets the BCDC priority to constant 0" - media: cxd2880: Bump to match 4.18.y version - media: cxd2880-spi: Bump to match 4.18.y version - Revert "mm: alloc_contig: re-allow CMA to compact FS pages" - Revert "Revert "mm: alloc_contig: re-allow CMA to compact FS pages"" - cxd2880: CXD2880_SPI_DRV should select DVB_CXD2880 with MEDIA_SUBDRV_AUTOSELECT - 950-0421-HID-hid-bigbenff-driver-for-BigBen-Interactive-PS3OF.patch - 950-0453-Add-hid-bigbenff-to-list-of-have_special_driver-for-.patch Make I2C built-in instead of modular as in upstream defconfig; also the easiest way to get MFD_ARIZONA enabled, which is required by kmod-sound-soc-rpi-cirrus. Add missing compatible strings from 4.9/960-add-rasbperrypi-compatible.patch, using upstream names for compute modules. Add extra patch to enable the LEDs on lan78xx. Compile-tested: bcm2708, bcm2709, bcm2710 (with CONFIG_ALL_KMODS=y) Runtime-tested: bcm2708, bcm2710 Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>
129 lines
4.2 KiB
Diff
129 lines
4.2 KiB
Diff
From 8edeb93cec4b7ca6771348fafbf4676920b052c9 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Mon, 16 Jul 2018 14:40:13 +0100
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Subject: [PATCH 362/454] dwc-otg: FIQ: Fix "bad mode in data abort handler"
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Create a semi-static mapping for the USB registers early in the boot
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process, before additional kernel threads are started, so all threads
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will have the mappings from the start. This avoids the need for
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data aborts to lazily update them.
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See: https://github.com/raspberrypi/linux/issues/2450
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Signed-off-by: Floris Bos <bos@je-eigen-domein.nl>
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---
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arch/arm/mach-bcm/board_bcm2835.c | 69 +++++++++++++++++++++++
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drivers/usb/host/dwc_otg/dwc_otg_driver.c | 2 +-
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2 files changed, 70 insertions(+), 1 deletion(-)
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--- a/arch/arm/mach-bcm/board_bcm2835.c
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+++ b/arch/arm/mach-bcm/board_bcm2835.c
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@@ -15,6 +15,7 @@
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#include <linux/init.h>
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#include <linux/irqchip.h>
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#include <linux/of_address.h>
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+#include <linux/of_fdt.h>
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#include <linux/clk/bcm2835.h>
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#include <asm/system_info.h>
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@@ -24,6 +25,9 @@
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#include "platsmp.h"
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#include <linux/dma-mapping.h>
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+#define BCM2835_USB_VIRT_BASE 0xf0980000
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+#define BCM2835_USB_VIRT_MPHI 0xf0006000
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+
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static void __init bcm2835_init(void)
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{
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struct device_node *np = of_find_node_by_path("/system");
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@@ -44,6 +48,70 @@ static void __init bcm2835_init_early(vo
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init_dma_coherent_pool_size(SZ_1M);
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}
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+/*
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+ * We need to map registers that are going to be accessed by the FIQ
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+ * very early, before any kernel threads are spawned. Because if done
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+ * later, the mapping tables are not updated instantly but lazily upon
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+ * first access through a data abort handler. While that is fine
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+ * when executing regular kernel code, if the first access in a specific
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+ * thread happens while running FIQ code this will result in a panic.
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+ *
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+ * For more background see the following old mailing list thread:
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+ * https://www.spinics.net/lists/arm-kernel/msg325250.html
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+ */
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+static int __init bcm2835_map_usb(unsigned long node, const char *uname,
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+ int depth, void *data)
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+{
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+ struct map_desc map[2];
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+ const __be32 *reg;
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+ int len;
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+ unsigned long p2b_offset = *((unsigned long *) data);
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+
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+ if (!of_flat_dt_is_compatible(node, "brcm,bcm2708-usb"))
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+ return 0;
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+ reg = of_get_flat_dt_prop(node, "reg", &len);
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+ if (!reg || len != (sizeof(unsigned long) * 4))
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+ return 0;
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+
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+ /* Use information about the physical addresses of the
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+ * registers from the device tree, but use legacy
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+ * iotable_init() static mapping function to map them,
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+ * as ioremap() is not functional at this stage in boot.
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+ */
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+ map[0].virtual = (unsigned long) BCM2835_USB_VIRT_BASE;
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+ map[0].pfn = __phys_to_pfn(be32_to_cpu(reg[0]) - p2b_offset);
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+ map[0].length = be32_to_cpu(reg[1]);
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+ map[0].type = MT_DEVICE;
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+ map[1].virtual = (unsigned long) BCM2835_USB_VIRT_MPHI;
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+ map[1].pfn = __phys_to_pfn(be32_to_cpu(reg[2]) - p2b_offset);
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+ map[1].length = be32_to_cpu(reg[3]);
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+ map[1].type = MT_DEVICE;
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+ iotable_init(map, 2);
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+
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+ return 1;
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+}
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+
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+static void __init bcm2835_map_io(void)
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+{
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+ const __be32 *ranges;
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+ int soc, len;
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+ unsigned long p2b_offset;
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+
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+ debug_ll_io_init();
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+
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+ /* Find out how to map bus to physical address first from soc/ranges */
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+ soc = of_get_flat_dt_subnode_by_name(of_get_flat_dt_root(), "soc");
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+ if (soc < 0)
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+ return;
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+ ranges = of_get_flat_dt_prop(soc, "ranges", &len);
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+ if (!ranges || len < (sizeof(unsigned long) * 3))
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+ return;
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+ p2b_offset = be32_to_cpu(ranges[0]) - be32_to_cpu(ranges[1]);
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+
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+ /* Now search for bcm2708-usb node in device tree */
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+ of_scan_flat_dt(bcm2835_map_usb, &p2b_offset);
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+}
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+
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static const char * const bcm2835_compat[] = {
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#ifdef CONFIG_ARCH_MULTI_V6
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"brcm,bcm2835",
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@@ -56,6 +124,7 @@ static const char * const bcm2835_compat
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};
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DT_MACHINE_START(BCM2835, "BCM2835")
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+ .map_io = bcm2835_map_io,
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.init_machine = bcm2835_init,
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.init_early = bcm2835_init_early,
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.dt_compat = bcm2835_compat,
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--- a/drivers/usb/host/dwc_otg/dwc_otg_driver.c
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+++ b/drivers/usb/host/dwc_otg/dwc_otg_driver.c
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@@ -837,7 +837,7 @@ static int dwc_otg_driver_probe(
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retval = -ENOMEM;
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goto fail;
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}
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- dev_dbg(&_dev->dev, "base=0x%08x\n",
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+ dev_info(&_dev->dev, "base=0x%08x\n",
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(unsigned)dwc_otg_device->os_dep.base);
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#endif
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