ath11k: add simple PCI client driver for QCA6390 chipset

QCA6390 is a PCI based 11ax chipset, split AHB into own kernel module
ath11k_ahb.ko and add ath11k_pci.ko for PCI devices.

Tested-on: QCA6390 hw2.0 PCI WLAN.HST.1.0.1-01740-QCAHSTSWPLZ_V2_TO_X86-1
Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.1.0.1-01238-QCAHKSWPL_SILICONZ-2

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1597309466-19688-5-git-send-email-kvalo@codeaurora.org

1 files changed, 88 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath11k/pci.c b/drivers/net/wireless/ath/ath11k/pci.c
new file mode 100644
index 000000000000..a88536d2c64b
--- /dev/null
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: BSD-3-Clause-Clear
+/*
+ * Copyright (c) 2019-2020 The Linux Foundation. All rights reserved.
+ */
+
+#include <linux/module.h>
+#include <linux/pci.h>
+
+#include "core.h"
+#include "debug.h"
+
+#define QCA6390_DEVICE_ID		0x1101
+
+static const struct pci_device_id ath11k_pci_id_table[] = {
+	{ PCI_VDEVICE(QCOM, QCA6390_DEVICE_ID) },
+	{0}
+};
+
+MODULE_DEVICE_TABLE(pci, ath11k_pci_id_table);
+
+static int ath11k_pci_probe(struct pci_dev *pdev,
+			    const struct pci_device_id *pci_dev)
+{
+	struct ath11k_base *ab;
+	enum ath11k_hw_rev hw_rev;
+
+	dev_warn(&pdev->dev, "WARNING: ath11k PCI support is experimental!\n");
+
+	switch (pci_dev->device) {
+	case QCA6390_DEVICE_ID:
+		hw_rev = ATH11K_HW_QCA6390_HW20;
+		break;
+	default:
+		dev_err(&pdev->dev, "Unknown PCI device found: 0x%x\n",
+			pci_dev->device);
+		return -ENOTSUPP;
+	}
+
+	ab = ath11k_core_alloc(&pdev->dev, 0, ATH11K_BUS_PCI);
+	if (!ab) {
+		dev_err(&pdev->dev, "failed to allocate ath11k base\n");
+		return -ENOMEM;
+	}
+
+	ab->dev = &pdev->dev;
+	ab->hw_rev = hw_rev;
+	pci_set_drvdata(pdev, ab);
+
+	return 0;
+}
+
+static void ath11k_pci_remove(struct pci_dev *pdev)
+{
+	struct ath11k_base *ab = pci_get_drvdata(pdev);
+
+	set_bit(ATH11K_FLAG_UNREGISTERING, &ab->dev_flags);
+	ath11k_core_free(ab);
+}
+
+static struct pci_driver ath11k_pci_driver = {
+	.name = "ath11k_pci",
+	.id_table = ath11k_pci_id_table,
+	.probe = ath11k_pci_probe,
+	.remove = ath11k_pci_remove,
+};
+
+static int ath11k_pci_init(void)
+{
+	int ret;
+
+	ret = pci_register_driver(&ath11k_pci_driver);
+	if (ret)
+		pr_err("failed to register ath11k pci driver: %d\n",
+		       ret);
+
+	return ret;
+}
+module_init(ath11k_pci_init);
+
+static void ath11k_pci_exit(void)
+{
+	pci_unregister_driver(&ath11k_pci_driver);
+}
+
+module_exit(ath11k_pci_exit);
+
+MODULE_DESCRIPTION("Driver support for Qualcomm Technologies 802.11ax WLAN PCIe devices");
+MODULE_LICENSE("Dual BSD/GPL");