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f31ab2abef
Some VRX518 modems fail to initialize properly with the error message
"dc_ep_clk_on failed". As a result, the DSL data path doesn't work.
This hack, which is based on code from the FRITZ!Box 7530 GPL archive,
fixes the issue. It changes the PCIe vendor/device ID to values matching
a Lantiq SoC. It also appears to emulate a Lantiq CPU ID register for
connected PCIe devices, by remapping the matching address area to a
specially crafted buffer using the address translation unit.
A dedicated compatible is created to activate this in
the device tree, so this shouldn't affect any devices other than
FRITZ!Box 7530/7520.
Original investigation was done in 59f5212517 which used the "avm,host_magic" property to enabled the patch.
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Florian Maurer <f.maurer@outlook.de>
Link: https://github.com/openwrt/openwrt/pull/17622
Signed-off-by: Robert Marko <robimarko@gmail.com>
(cherry picked from commit 676dcb1b2cf84142a61d51a15e7a8e1bdc937c23)
43 lines
1.5 KiB
Diff
43 lines
1.5 KiB
Diff
From a78794562fcb2659c976388b1285eddda97e9954 Mon Sep 17 00:00:00 2001
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From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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Date: Tue, 10 Oct 2023 21:29:13 +0530
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Subject: [PATCH] PCI: dwc: Add host_post_init() callback
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This callback can be used by the platform drivers to do configuration
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once all the devices are scanned. Like changing LNKCTL of all downstream
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devices to enable ASPM etc...
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Link: https://lore.kernel.org/linux-pci/20231010155914.9516-2-manivannan.sadhasivam@linaro.org
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Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
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Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
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---
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drivers/pci/controller/dwc/pcie-designware-host.c | 3 +++
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drivers/pci/controller/dwc/pcie-designware.h | 1 +
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2 files changed, 4 insertions(+)
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--- a/drivers/pci/controller/dwc/pcie-designware-host.c
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+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
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@@ -502,6 +502,9 @@ int dw_pcie_host_init(struct dw_pcie_rp
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if (ret)
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goto err_stop_link;
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+ if (pp->ops->host_post_init)
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+ pp->ops->host_post_init(pp);
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+
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return 0;
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err_stop_link:
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--- a/drivers/pci/controller/dwc/pcie-designware.h
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+++ b/drivers/pci/controller/dwc/pcie-designware.h
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@@ -301,6 +301,7 @@ enum dw_pcie_ltssm {
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struct dw_pcie_host_ops {
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int (*host_init)(struct dw_pcie_rp *pp);
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void (*host_deinit)(struct dw_pcie_rp *pp);
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+ void (*host_post_init)(struct dw_pcie_rp *pp);
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int (*msi_host_init)(struct dw_pcie_rp *pp);
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void (*pme_turn_off)(struct dw_pcie_rp *pp);
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};
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