brcmfmac: add hostready indication

A hostready signal is introduced to inform firmware through mailbox
doorbell1 when common ring initialized or D3 exited.
Reviewed-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

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

@@ -105,7 +105,8 @@ static const struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
 #define BRCMF_PCIE_PCIE2REG_MAILBOXMASK		0x4C
 #define BRCMF_PCIE_PCIE2REG_CONFIGADDR		0x120
 #define BRCMF_PCIE_PCIE2REG_CONFIGDATA		0x124
-#define BRCMF_PCIE_PCIE2REG_H2D_MAILBOX		0x140
+#define BRCMF_PCIE_PCIE2REG_H2D_MAILBOX_0	0x140
+#define BRCMF_PCIE_PCIE2REG_H2D_MAILBOX_1	0x144
 
 #define BRCMF_PCIE2_INTA			0x01
 #define BRCMF_PCIE2_INTB			0x02
@@ -140,6 +141,7 @@ static const struct brcmf_firmware_mapping brcmf_pcie_fwnames[] = {
 #define BRCMF_PCIE_SHARED_VERSION_MASK		0x00FF
 #define BRCMF_PCIE_SHARED_DMA_INDEX		0x10000
 #define BRCMF_PCIE_SHARED_DMA_2B_IDX		0x100000
+#define BRCMF_PCIE_SHARED_HOSTRDY_DB1		0x10000000
 
 #define BRCMF_PCIE_FLAGS_HTOD_SPLIT		0x4000
 #define BRCMF_PCIE_FLAGS_DTOH_SPLIT		0x8000
@@ -782,6 +784,12 @@ static void brcmf_pcie_intr_enable(struct brcmf_pciedev_info *devinfo)
 			       BRCMF_PCIE_MB_INT_FN0_1);
 }
 
+static void brcmf_pcie_hostready(struct brcmf_pciedev_info *devinfo)
+{
+	if (devinfo->shared.flags & BRCMF_PCIE_SHARED_HOSTRDY_DB1)
+		brcmf_pcie_write_reg32(devinfo,
+				       BRCMF_PCIE_PCIE2REG_H2D_MAILBOX_1, 1);
+}
 
 static irqreturn_t brcmf_pcie_quick_check_isr(int irq, void *arg)
 {
@@ -924,7 +932,7 @@ static int brcmf_pcie_ring_mb_ring_bell(void *ctx)
 
 	brcmf_dbg(PCIE, "RING !\n");
 	/* Any arbitrary value will do, lets use 1 */
-	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_H2D_MAILBOX, 1);
+	brcmf_pcie_write_reg32(devinfo, BRCMF_PCIE_PCIE2REG_H2D_MAILBOX_0, 1);
 
 	return 0;
 }
@@ -1728,6 +1736,7 @@ static void brcmf_pcie_setup(struct device *dev, int ret,
 	init_waitqueue_head(&devinfo->mbdata_resp_wait);
 
 	brcmf_pcie_intr_enable(devinfo);
+	brcmf_pcie_hostready(devinfo);
 	if (brcmf_attach(&devinfo->pdev->dev, devinfo->settings) == 0)
 		return;
 
@@ -1950,6 +1959,7 @@ static int brcmf_pcie_pm_leave_D3(struct device *dev)
 		brcmf_pcie_select_core(devinfo, BCMA_CORE_PCIE2);
 		brcmf_bus_change_state(bus, BRCMF_BUS_UP);
 		brcmf_pcie_intr_enable(devinfo);
+		brcmf_pcie_hostready(devinfo);
 		return 0;
 	}