package/kernel/mac80211/patches/brcm/370-v5.2-brcmfmac-send-mailbox-interrupt-twice-for-specific-h.patch

   1 From 99d94ef367af67f630b38c93ff46c5819b7d06b6 Mon Sep 17 00:00:00 2001
   2 From: Wright Feng <Wright.Feng@cypress.com>
   3 Date: Thu, 25 Apr 2019 07:05:46 +0000
   4 Subject: [PATCH] brcmfmac: send mailbox interrupt twice for specific hardware
   5  device
   6
   7 For PCIE wireless device with core revision less than 14, device may miss
   8 PCIE to System Backplane Interrupt via PCIEtoSBMailbox. So add sending
   9 mail box interrupt twice as a hardware workaround.
  10
  11 Signed-off-by: Wright Feng <wright.feng@cypress.com>
  12 Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
  13 Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
  14 ---
  15  drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c | 6 +++++-
  16  1 file changed, 5 insertions(+), 1 deletion(-)
  17
  18 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
  19 +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c
  20 @@ -698,7 +698,11 @@ brcmf_pcie_send_mb_data(struct brcmf_pci
  21
  22         brcmf_pcie_write_tcm32(devinfo, addr, htod_mb_data);
  23         pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1);
  24 -       pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1);
  25 +
  26 +       /* Send mailbox interrupt twice as a hardware workaround */
  27 +       core = brcmf_chip_get_core(devinfo->ci, BCMA_CORE_PCIE2);
  28 +       if (core->rev <= 13)
  29 +               pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_SBMBX, 1);
  30
  31         return 0;
  32  }