wifi: brcmfmac: Mask all IRQs before starting firmware

Make sure the firmware can't get any early notifications by masking all
IRQs explicitly before loading the firmware.

Signed-off-by: Hector Martin <marcan@marcan.st>

Author: marcan

drivers/net/wireless/broadcom/brcm80211/brcmfmac/pcie.c

@@ -336,6 +336,7 @@ static const struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
 #define BRCMF_PCIE_CFGREG_PML1_SUB_CTRL1	0x248
 #define BRCMF_PCIE_CFGREG_REG_BAR2_CONFIG	0x4E0
 #define BRCMF_PCIE_CFGREG_REG_BAR3_CONFIG	0x4F4
+#define BRCMF_PCIE_CFGREG_TLCNTRL_5		0x814
 #define BRCMF_PCIE_LINK_STATUS_CTRL_ASPM_ENAB	3
 
 /* Magic number at a magic location to find RAM size */
@@ -828,6 +829,21 @@ static int brcmf_pcie_enter_download_state(struct brcmf_pciedev_info *devinfo)
 		brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_ARMCR4REG_BANKPDA,
 				       0);
 	}
+
+	/* Ensure all IRQs are masked so the firmware doesn't get
+	 * a hostready notification too early.
+	 */
+
+	brcmf_pcie_write_pcie32(devinfo, devinfo->reginfo->mailboxmask, 0);
+	brcmf_pcie_write_pcie32(devinfo, devinfo->reginfo->mailboxint,
+				0xffffffff);
+
+	pci_write_config_dword(devinfo->pdev, BRCMF_PCIE_REG_INTMASK, 0);
+
+	brcmf_pcie_write_pcie32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGADDR,
+				BRCMF_PCIE_CFGREG_TLCNTRL_5);
+	brcmf_pcie_write_pcie32(devinfo, BRCMF_PCIE_PCIE2REG_CONFIGDATA,
+				0xffffffff);
 	return 0;
 }