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Commit d95866d7 authored by Yue Ma's avatar Yue Ma
Browse files

cnss2: Add support to suspend/resume MHI driver 



For new WLAN chipsets, MHI driver should be suspended/resumed while
system and runtime PM suspend/resume.

Change-Id: I319e18f70def9ef1f8ba9972ddff495cde9e1198
Signed-off-by: default avatarYue Ma <yuem@codeaurora.org>
parent 79551c4b

drivers/net/wireless/cnss2/pci.c

+21 −2
Original line number Diff line number Diff line
@@ -360,9 +360,11 @@ static int cnss_pci_suspend(struct device *dev) 
	driver_ops = plat_priv->driver_ops;

	if (driver_ops && driver_ops->suspend) {

		ret = driver_ops->suspend(pci_dev, state);

		if (pci_priv->pci_link_state)

		if (pci_priv->pci_link_state) {

			cnss_set_pci_config_space(pci_priv,

						  SAVE_PCI_CONFIG_SPACE);

			cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_SUSPEND);

		}

	}



	cnss_pci_set_monitor_wake_intr(pci_priv, false);
@@ -391,6 +393,7 @@ static int cnss_pci_resume(struct device *dev) 
		if (pci_priv->saved_state)

			cnss_set_pci_config_space(pci_priv,

						  RESTORE_PCI_CONFIG_SPACE);

		cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_RESUME);

		ret = driver_ops->resume(pci_dev);

	}
@@ -558,6 +561,11 @@ int cnss_auto_suspend(void) 
	pci_dev = pci_priv->pci_dev;



	if (pci_priv->pci_link_state) {

		if (cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_SUSPEND)) {

			ret = -EAGAIN;

			goto out;

		}



		cnss_set_pci_config_space(pci_priv, SAVE_PCI_CONFIG_SPACE);

		pci_disable_device(pci_dev);
@@ -567,7 +575,7 @@ int cnss_auto_suspend(void) 
		if (cnss_set_pci_link(pci_priv, PCI_LINK_DOWN)) {

			cnss_pr_err("Failed to shutdown PCI link!\n");

			ret = -EAGAIN;

			goto out;

			goto resume_mhi;

		}

	}
@@ -578,6 +586,13 @@ int cnss_auto_suspend(void) 
	bus_bw_info = &plat_priv->bus_bw_info;

	msm_bus_scale_client_update_request(bus_bw_info->bus_client,

					    CNSS_BUS_WIDTH_NONE);



	return 0;



resume_mhi:

	if (pci_enable_device(pci_dev))

		cnss_pr_err("Failed to enable PCI device!\n");

	cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_RESUME);

out:

	return ret;

}
@@ -610,6 +625,7 @@ int cnss_auto_resume(void) 
		if (ret)

			cnss_pr_err("Failed to enable PCI device, err = %d\n",

				    ret);

		cnss_pci_set_mhi_state(pci_priv, CNSS_MHI_RESUME);

	}



	cnss_set_pci_config_space(pci_priv, RESTORE_PCI_CONFIG_SPACE);
@@ -1138,6 +1154,9 @@ int cnss_pci_set_mhi_state(struct cnss_pci_data *pci_priv, 
		return -ENODEV;

	}



	if (pci_priv->device_id == QCA6174_DEVICE_ID)

		return 0;



	if (mhi_dev_state < 0) {

		cnss_pr_err("Invalid MHI DEV state (%d)\n", mhi_dev_state);

		return -EINVAL;