HID: intel-ish-hid: consolidate ish wake up operation

Same operations are done in ish_hw_start() and _ish_hw_reset() to
wakeup ISH device. Consolidate them by introducing a new function
ish_wakeup() and move the code there.

Signed-off-by: Even Xu <even.xu@intel.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/drivers/hid/intel-ish-hid/ipc/ipc.c b/drivers/hid/intel-ish-hid/ipc/ipc.c
index e2517c1..d4c5721 100644 (file)
--- a/drivers/hid/intel-ish-hid/ipc/ipc.c
+++ b/drivers/hid/intel-ish-hid/ipc/ipc.c
@@ -638,6 +638,28 @@ eoi:
 }
 
 /**
+ * ish_wakeup() - wakeup ishfw from waiting-for-host state
+ * @dev: ishtp device pointer
+ *
+ * Set the dma enable bit and send a void message to FW,
+ * it wil wakeup FW from waiting-for-host state.
+ */
+static void ish_wakeup(struct ishtp_device *dev)
+{
+       /* Set dma enable bit */
+       ish_reg_write(dev, IPC_REG_ISH_RMP2, IPC_RMP2_DMA_ENABLED);
+
+       /*
+        * Send 0 IPC message so that ISH FW wakes up if it was already
+        * asleep.
+        */
+       ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, IPC_DRBL_BUSY_BIT);
+
+       /* Flush writes to doorbell and REMAP2 */
+       ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS);
+}
+
+/**
  * _ish_hw_reset() - HW reset
  * @dev: ishtp device pointer
  *
@@ -690,16 +712,8 @@ static int _ish_hw_reset(struct ishtp_device *dev)
        csr |= PCI_D0;
        pci_write_config_word(pdev, pdev->pm_cap + PCI_PM_CTRL, csr);
 
-       ish_reg_write(dev, IPC_REG_ISH_RMP2, IPC_RMP2_DMA_ENABLED);
-
-       /*
-        * Send 0 IPC message so that ISH FW wakes up if it was already
-        * asleep
-        */
-       ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, IPC_DRBL_BUSY_BIT);
-
-       /* Flush writes to doorbell and REMAP2 */
-       ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS);
+       /* Now we can enable ISH DMA operation and wakeup ISHFW */
+       ish_wakeup(dev);
 
        return  0;
 }
@@ -758,16 +772,9 @@ static int _ish_ipc_reset(struct ishtp_device *dev)
 int ish_hw_start(struct ishtp_device *dev)
 {
        ish_set_host_rdy(dev);
-       /* After that we can enable ISH DMA operation */
-       ish_reg_write(dev, IPC_REG_ISH_RMP2, IPC_RMP2_DMA_ENABLED);
 
-       /*
-        * Send 0 IPC message so that ISH FW wakes up if it was already
-        * asleep
-        */
-       ish_reg_write(dev, IPC_REG_HOST2ISH_DRBL, IPC_DRBL_BUSY_BIT);
-       /* Flush write to doorbell */
-       ish_reg_read(dev, IPC_REG_ISH_HOST_FWSTS);
+       /* After that we can enable ISH DMA operation and wakeup ISHFW */
+       ish_wakeup(dev);
 
        set_host_ready(dev);