1 files changed, 223 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 000000000000..0fc83edd6bad
--- /dev/null
+++ b/drivers/net/wireless/ath/wil6210/pcie_bus.c
@@ -0,0 +1,223 @@
+/*
+ * Copyright (c) 2012 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/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/netdevice.h>
+#include <linux/debugfs.h>
+#include <linux/pci.h>
+#include <linux/moduleparam.h>
+
+#include "wil6210.h"
+
+static int use_msi = 1;
+module_param(use_msi, int, S_IRUGO);
+MODULE_PARM_DESC(use_msi,
+                 " Use MSI interrupt: "
+                 "0 - don't, 1 - (default) - single, or 3");
+
+/* Bus ops */
+static int wil_if_pcie_enable(struct wil6210_priv *wil)
+{
+        struct pci_dev *pdev = wil->pdev;
+        int rc;
+
+        pci_set_master(pdev);
+
+        /*
+         * how many MSI interrupts to request?
+         */
+        switch (use_msi) {
+        case 3:
+        case 1:
+        case 0:
+                break;
+        default:
+                wil_err(wil, "Invalid use_msi=%d, default to 1\n",
+                        use_msi);
+                use_msi = 1;
+        }
+        wil->n_msi = use_msi;
+        if (wil->n_msi) {
+                wil_dbg(wil, "Setup %d MSI interrupts\n", use_msi);
+                rc = pci_enable_msi_block(pdev, wil->n_msi);
+                if (rc && (wil->n_msi == 3)) {
+                        wil_err(wil, "3 MSI mode failed, try 1 MSI\n");
+                        wil->n_msi = 1;
+                        rc = pci_enable_msi_block(pdev, wil->n_msi);
+                }
+                if (rc) {
+                        wil_err(wil, "pci_enable_msi failed, use INTx\n");
+                        wil->n_msi = 0;
+                }
+        } else {
+                wil_dbg(wil, "MSI interrupts disabled, use INTx\n");
+        }
+
+        rc = wil6210_init_irq(wil, pdev->irq);
+        if (rc)
+                goto stop_master;
+
+        /* need reset here to obtain MAC */
+        rc = wil_reset(wil);
+        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;
+
+        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_pcie_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+        struct wil6210_priv *wil;
+        struct device *dev = &pdev->dev;
+        void __iomem *csr;
+        int rc;
+
+        /* 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;
+        }
+
+        rc = pci_enable_device(pdev);
+        if (rc) {
+                dev_err(&pdev->dev, "pci_enable_device failed\n");
+                return -ENODEV;
+        }
+        /* rollback to err_disable_pdev */
+
+        rc = pci_request_region(pdev, 0, WIL_NAME);
+        if (rc) {
+                dev_err(&pdev->dev, "pci_request_region failed\n");
+                goto err_disable_pdev;
+        }
+        /* rollback to err_release_reg */
+
+        csr = pci_ioremap_bar(pdev, 0);
+        if (!csr) {
+                dev_err(&pdev->dev, "pci_ioremap_bar failed\n");
+                rc = -ENODEV;
+                goto err_release_reg;
+        }
+        /* rollback to err_iounmap */
+        dev_info(&pdev->dev, "CSR at %pR -> %p\n", &pdev->resource[0], csr);
+
+        wil = wil_if_alloc(dev, csr);
+        if (IS_ERR(wil)) {
+                rc = (int)PTR_ERR(wil);
+                dev_err(dev, "wil_if_alloc failed: %d\n", rc);
+                goto err_iounmap;
+        }
+        /* rollback to if_free */
+
+        pci_set_drvdata(pdev, wil);
+        wil->pdev = pdev;
+
+        /* FW should raise IRQ when ready */
+        rc = wil_if_pcie_enable(wil);
+        if (rc) {
+                wil_err(wil, "Enable device failed\n");
+                goto if_free;
+        }
+        /* rollback to bus_disable */
+
+        rc = wil_if_add(wil);
+        if (rc) {
+                wil_err(wil, "wil_if_add failed: %d\n", rc);
+                goto bus_disable;
+        }
+
+        wil6210_debugfs_init(wil);
+
+        /* check FW is alive */
+        wmi_echo(wil);
+
+        return 0;
+
+ bus_disable:
+        wil_if_pcie_disable(wil);
+ if_free:
+        wil_if_free(wil);
+ err_iounmap:
+        pci_iounmap(pdev, csr);
+ err_release_reg:
+        pci_release_region(pdev, 0);
+ err_disable_pdev:
+        pci_disable_device(pdev);
+
+        return rc;
+}
+
+static void wil_pcie_remove(struct pci_dev *pdev)
+{
+        struct wil6210_priv *wil = pci_get_drvdata(pdev);
+
+        wil6210_debugfs_remove(wil);
+        wil_if_pcie_disable(wil);
+        wil_if_remove(wil);
+        wil_if_free(wil);
+        pci_iounmap(pdev, wil->csr);
+        pci_release_region(pdev, 0);
+        pci_disable_device(pdev);
+        pci_set_drvdata(pdev, NULL);
+}
+
+static DEFINE_PCI_DEVICE_TABLE(wil6210_pcie_ids) = {
+        { PCI_DEVICE(0x1ae9, 0x0301) },
+        { /* end: all zeroes */ },
+};
+MODULE_DEVICE_TABLE(pci, wil6210_pcie_ids);
+
+static struct pci_driver wil6210_driver = {
+        .probe          = wil_pcie_probe,
+        .remove         = wil_pcie_remove,
+        .id_table       = wil6210_pcie_ids,
+        .name           = WIL_NAME,
+};
+
+module_pci_driver(wil6210_driver);
+
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_AUTHOR("Qualcomm Atheros <wil6210@qca.qualcomm.com>");
+MODULE_DESCRIPTION("Driver for 60g WiFi WIL6210 card");