1 files changed, 482 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wil6210/pcie_bus.c b/drivers/net/wireless/ath/wil6210/pcie_bus.c
new file mode 100644
index 0000000..874c787
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -0,0 +1,482 @@
+/*
+ * Copyright (c) 2012-2016 Qualcomm Atheros, Inc.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/suspend.h>
+#include "wil6210.h"
+#include <linux/rtnetlink.h>
+
+static bool use_msi = true;
+module_param(use_msi, bool, 0444);
+MODULE_PARM_DESC(use_msi, " Use MSI interrupt, default - true");
+
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+static int wil6210_pm_notify(struct notifier_block *notify_block,
+			     unsigned long mode, void *unused);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
+static
+void wil_set_capabilities(struct wil6210_priv *wil)
+{
+	u32 jtag_id = wil_r(wil, RGF_USER_JTAG_DEV_ID);
+	u8 chip_revision = (wil_r(wil, RGF_USER_REVISION_ID) &
+			    RGF_USER_REVISION_ID_MASK);
+
+	bitmap_zero(wil->hw_capabilities, hw_capability_last);
+	bitmap_zero(wil->fw_capabilities, WMI_FW_CAPABILITY_MAX);
+	wil->wil_fw_name = WIL_FW_NAME_DEFAULT;
+	wil->chip_revision = chip_revision;
+
+	switch (jtag_id) {
+	case JTAG_DEV_ID_SPARROW:
+		switch (chip_revision) {
+		case REVISION_ID_SPARROW_D0:
+			wil->hw_name = "Sparrow D0";
+			wil->hw_version = HW_VER_SPARROW_D0;
+			if (wil_fw_verify_file_exists(wil,
+						      WIL_FW_NAME_SPARROW_PLUS))
+				wil->wil_fw_name = WIL_FW_NAME_SPARROW_PLUS;
+			break;
+		case REVISION_ID_SPARROW_B0:
+			wil->hw_name = "Sparrow B0";
+			wil->hw_version = HW_VER_SPARROW_B0;
+			break;
+		default:
+			wil->hw_name = "Unknown";
+			wil->hw_version = HW_VER_UNKNOWN;
+			break;
+		}
+		break;
+	default:
+		wil_err(wil, "Unknown board hardware, chip_id 0x%08x, chip_revision 0x%08x\n",
+			jtag_id, chip_revision);
+		wil->hw_name = "Unknown";
+		wil->hw_version = HW_VER_UNKNOWN;
+	}
+
+	wil_info(wil, "Board hardware is %s\n", wil->hw_name);
+
+	/* extract FW capabilities from file without loading the FW */
+	wil_request_firmware(wil, wil->wil_fw_name, false);
+}
+
+void wil_disable_irq(struct wil6210_priv *wil)
+{
+	disable_irq(wil->pdev->irq);
+}
+
+void wil_enable_irq(struct wil6210_priv *wil)
+{
+	enable_irq(wil->pdev->irq);
+}
+
+/* Bus ops */
+static int wil_if_pcie_enable(struct wil6210_priv *wil)
+{
+	struct pci_dev *pdev = wil->pdev;
+	int rc;
+	/* on platforms with buggy ACPI, pdev->msi_enabled may be set to
+	 * allow pci_enable_device to work. This indicates INTx was not routed
+	 * and only MSI should be used
+	 */
+	int msi_only = pdev->msi_enabled;
+	bool _use_msi = use_msi;
+	bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
+				 wil->fw_capabilities);
+
+	wil_dbg_misc(wil, "if_pcie_enable, wmi_only %d\n", wmi_only);
+
+	pdev->msi_enabled = 0;
+
+	pci_set_master(pdev);
+
+	wil_dbg_misc(wil, "Setup %s interrupt\n", use_msi ? "MSI" : "INTx");
+
+	if (use_msi && pci_enable_msi(pdev)) {
+		wil_err(wil, "pci_enable_msi failed, use INTx\n");
+		_use_msi = false;
+	}
+
+	if (!_use_msi && msi_only) {
+		wil_err(wil, "Interrupt pin not routed, unable to use INTx\n");
+		rc = -ENODEV;
+		goto stop_master;
+	}
+
+	rc = wil6210_init_irq(wil, pdev->irq, _use_msi);
+	if (rc)
+		goto stop_master;
+
+	/* need reset here to obtain MAC or in case of WMI-only FW, full reset
+	 * and fw loading takes place
+	 */
+	mutex_lock(&wil->mutex);
+	rc = wil_reset(wil, wmi_only);
+	mutex_unlock(&wil->mutex);
+	if (rc)
+		goto release_irq;
+
+	return 0;
+
+ release_irq:
+	wil6210_fini_irq(wil, pdev->irq);
+	/* safe to call if no MSI */
+	pci_disable_msi(pdev);
+ stop_master:
+	pci_clear_master(pdev);
+	return rc;
+}
+
+static int wil_if_pcie_disable(struct wil6210_priv *wil)
+{
+	struct pci_dev *pdev = wil->pdev;
+
+	wil_dbg_misc(wil, "if_pcie_disable\n");
+
+	pci_clear_master(pdev);
+	/* disable and release IRQ */
+	wil6210_fini_irq(wil, pdev->irq);
+	/* safe to call if no MSI */
+	pci_disable_msi(pdev);
+	/* TODO: disable HW */
+
+	return 0;
+}
+
+static int wil_platform_rop_ramdump(void *wil_handle, void *buf, uint32_t size)
+{
+	struct wil6210_priv *wil = wil_handle;
+
+	if (!wil)
+		return -EINVAL;
+
+	return wil_fw_copy_crash_dump(wil, buf, size);
+}
+
+static int wil_platform_rop_fw_recovery(void *wil_handle)
+{
+	struct wil6210_priv *wil = wil_handle;
+
+	if (!wil)
+		return -EINVAL;
+
+	wil_fw_error_recovery(wil);
+
+	return 0;
+}
+
+static int wil_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+	struct wil6210_priv *wil;
+	struct device *dev = &pdev->dev;
+	int rc;
+	const struct wil_platform_rops rops = {
+		.ramdump = wil_platform_rop_ramdump,
+		.fw_recovery = wil_platform_rop_fw_recovery,
+	};
+
+	/* check HW */
+	dev_info(&pdev->dev, WIL_NAME
+		 " device found [%04x:%04x] (rev %x)\n",
+		 (int)pdev->vendor, (int)pdev->device, (int)pdev->revision);
+
+	if (pci_resource_len(pdev, 0) != WIL6210_MEM_SIZE) {
+		dev_err(&pdev->dev, "Not " WIL_NAME "? "
+			"BAR0 size is %lu while expecting %lu\n",
+			(ulong)pci_resource_len(pdev, 0), WIL6210_MEM_SIZE);
+		return -ENODEV;
+	}
+
+	wil = wil_if_alloc(dev);
+	if (IS_ERR(wil)) {
+		rc = (int)PTR_ERR(wil);
+		dev_err(dev, "wil_if_alloc failed: %d\n", rc);
+		return rc;
+	}
+	wil->pdev = pdev;
+	pci_set_drvdata(pdev, wil);
+	/* rollback to if_free */
+
+	wil->platform_handle =
+		wil_platform_init(&pdev->dev, &wil->platform_ops, &rops, wil);
+	if (!wil->platform_handle) {
+		rc = -ENODEV;
+		wil_err(wil, "wil_platform_init failed\n");
+		goto if_free;
+	}
+	/* rollback to err_plat */
+
+	rc = pci_enable_device(pdev);
+	if (rc) {
+		wil_err(wil,
+			"pci_enable_device failed, retry with MSI only\n");
+		/* Work around for platforms that can't allocate IRQ:
+		 * retry with MSI only
+		 */
+		pdev->msi_enabled = 1;
+		rc = pci_enable_device(pdev);
+	}
+	if (rc) {
+		wil_err(wil,
+			"pci_enable_device failed, even with MSI only\n");
+		goto err_plat;
+	}
+	/* rollback to err_disable_pdev */
+
+	rc = pci_request_region(pdev, 0, WIL_NAME);
+	if (rc) {
+		wil_err(wil, "pci_request_region failed\n");
+		goto err_disable_pdev;
+	}
+	/* rollback to err_release_reg */
+
+	wil->csr = pci_ioremap_bar(pdev, 0);
+	if (!wil->csr) {
+		wil_err(wil, "pci_ioremap_bar failed\n");
+		rc = -ENODEV;
+		goto err_release_reg;
+	}
+	/* rollback to err_iounmap */
+	wil_info(wil, "CSR at %pR -> 0x%p\n", &pdev->resource[0], wil->csr);
+
+	wil_set_capabilities(wil);
+	wil6210_clear_irq(wil);
+
+	/* FW should raise IRQ when ready */
+	rc = wil_if_pcie_enable(wil);
+	if (rc) {
+		wil_err(wil, "Enable device failed\n");
+		goto err_iounmap;
+	}
+	/* rollback to bus_disable */
+
+	rc = wil_if_add(wil);
+	if (rc) {
+		wil_err(wil, "wil_if_add failed: %d\n", rc);
+		goto bus_disable;
+	}
+
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+	wil->pm_notify.notifier_call = wil6210_pm_notify;
+	rc = register_pm_notifier(&wil->pm_notify);
+	if (rc)
+		/* Do not fail the driver initialization, as suspend can
+		 * be prevented in a later phase if needed
+		 */
+		wil_err(wil, "register_pm_notifier failed: %d\n", rc);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
+	wil6210_debugfs_init(wil);
+
+
+	return 0;
+
+bus_disable:
+	wil_if_pcie_disable(wil);
+err_iounmap:
+	pci_iounmap(pdev, wil->csr);
+err_release_reg:
+	pci_release_region(pdev, 0);
+err_disable_pdev:
+	pci_disable_device(pdev);
+err_plat:
+	if (wil->platform_ops.uninit)
+		wil->platform_ops.uninit(wil->platform_handle);
+if_free:
+	wil_if_free(wil);
+
+	return rc;
+}
+
+static void wil_pcie_remove(struct pci_dev *pdev)
+{
+	struct wil6210_priv *wil = pci_get_drvdata(pdev);
+	void __iomem *csr = wil->csr;
+
+	wil_dbg_misc(wil, "pcie_remove\n");
+
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+	unregister_pm_notifier(&wil->pm_notify);
+#endif /* CONFIG_PM_SLEEP */
+#endif /* CONFIG_PM */
+
+	wil6210_debugfs_remove(wil);
+	rtnl_lock();
+	wil_p2p_wdev_free(wil);
+	rtnl_unlock();
+	wil_if_remove(wil);
+	wil_if_pcie_disable(wil);
+	pci_iounmap(pdev, csr);
+	pci_release_region(pdev, 0);
+	pci_disable_device(pdev);
+	if (wil->platform_ops.uninit)
+		wil->platform_ops.uninit(wil->platform_handle);
+	wil_if_free(wil);
+}
+
+static const struct pci_device_id wil6210_pcie_ids[] = {
+	{ PCI_DEVICE(0x1ae9, 0x0310) },
+	{ PCI_DEVICE(0x1ae9, 0x0302) }, /* same as above, firmware broken */
+	{ /* end: all zeroes */	},
+};
+MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
+
+#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
+
+static int wil6210_suspend(struct device *dev, bool is_runtime)
+{
+	int rc = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct wil6210_priv *wil = pci_get_drvdata(pdev);
+
+	wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
+
+	rc = wil_can_suspend(wil, is_runtime);
+	if (rc)
+		goto out;
+
+	rc = wil_suspend(wil, is_runtime);
+	if (rc)
+		goto out;
+
+	/* TODO: how do I bring card in low power state? */
+
+	/* disable bus mastering */
+	pci_clear_master(pdev);
+	/* PCI will call pci_save_state(pdev) and pci_prepare_to_sleep(pdev) */
+
+out:
+	return rc;
+}
+
+static int wil6210_resume(struct device *dev, bool is_runtime)
+{
+	int rc = 0;
+	struct pci_dev *pdev = to_pci_dev(dev);
+	struct wil6210_priv *wil = pci_get_drvdata(pdev);
+
+	wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
+
+	/* allow master */
+	pci_set_master(pdev);
+
+	rc = wil_resume(wil, is_runtime);
+	if (rc)
+		pci_clear_master(pdev);
+
+	return rc;
+}
+
+static int wil6210_pm_notify(struct notifier_block *notify_block,
+			     unsigned long mode, void *unused)
+{
+	struct wil6210_priv *wil = container_of(
+		notify_block, struct wil6210_priv, pm_notify);
+	int rc = 0;
+	enum wil_platform_event evt;
+
+	wil_dbg_pm(wil, "pm_notify: mode (%ld)\n", mode);
+
+	switch (mode) {
+	case PM_HIBERNATION_PREPARE:
+	case PM_SUSPEND_PREPARE:
+	case PM_RESTORE_PREPARE:
+		rc = wil_can_suspend(wil, false);
+		if (rc)
+			break;
+		evt = WIL_PLATFORM_EVT_PRE_SUSPEND;
+		if (wil->platform_ops.notify)
+			rc = wil->platform_ops.notify(wil->platform_handle,
+						      evt);
+		break;
+	case PM_POST_SUSPEND:
+	case PM_POST_HIBERNATION:
+	case PM_POST_RESTORE:
+		evt = WIL_PLATFORM_EVT_POST_SUSPEND;
+		if (wil->platform_ops.notify)
+			rc = wil->platform_ops.notify(wil->platform_handle,
+						      evt);
+		break;
+	default:
+		wil_dbg_pm(wil, "unhandled notify mode %ld\n", mode);
+		break;
+	}
+
+	wil_dbg_pm(wil, "notification mode %ld: rc (%d)\n", mode, rc);
+	return rc;
+}
+
+static int wil6210_pm_suspend(struct device *dev)
+{
+	return wil6210_suspend(dev, false);
+}
+
+static int wil6210_pm_resume(struct device *dev)
+{
+	return wil6210_resume(dev, false);
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops wil6210_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(wil6210_pm_suspend, wil6210_pm_resume)
+};
+
+static struct pci_driver wil6210_driver = {
+	.probe		= wil_pcie_probe,
+	.remove		= wil_pcie_remove,
+	.id_table	= wil6210_pcie_ids,
+	.name		= WIL_NAME,
+	.driver		= {
+		.pm = &wil6210_pm_ops,
+	},
+};
+
+static int __init wil6210_driver_init(void)
+{
+	int rc;
+
+	rc = wil_platform_modinit();
+	if (rc)
+		return rc;
+
+	rc = pci_register_driver(&wil6210_driver);
+	if (rc)
+		wil_platform_modexit();
+	return rc;
+}
+module_init(wil6210_driver_init);
+
+static void __exit wil6210_driver_exit(void)
+{
+	pci_unregister_driver(&wil6210_driver);
+	wil_platform_modexit();
+}
+module_exit(wil6210_driver_exit);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
+MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");