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path: root/drivers/net/ethernet/cadence/macb_pci.c
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Diffstat (limited to 'drivers/net/ethernet/cadence/macb_pci.c')
-rw-r--r--drivers/net/ethernet/cadence/macb_pci.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/net/ethernet/cadence/macb_pci.c b/drivers/net/ethernet/cadence/macb_pci.c
new file mode 100644
index 000000000..f66d22de5
--- /dev/null
+++ b/drivers/net/ethernet/cadence/macb_pci.c
@@ -0,0 +1,134 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * DOC: Cadence GEM PCI wrapper.
+ *
+ * Copyright (C) 2016 Cadence Design Systems - https://www.cadence.com
+ *
+ * Authors: Rafal Ozieblo <rafalo@cadence.com>
+ * Bartosz Folta <bfolta@cadence.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/etherdevice.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include "macb.h"
+
+#define PCI_DRIVER_NAME "macb_pci"
+#define PLAT_DRIVER_NAME "macb"
+
+#define CDNS_VENDOR_ID 0x17cd
+#define CDNS_DEVICE_ID 0xe007
+
+#define GEM_PCLK_RATE 50000000
+#define GEM_HCLK_RATE 50000000
+
+static int macb_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int err;
+ struct platform_device *plat_dev;
+ struct platform_device_info plat_info;
+ struct macb_platform_data plat_data;
+ struct resource res[2];
+
+ /* enable pci device */
+ err = pcim_enable_device(pdev);
+ if (err < 0) {
+ dev_err(&pdev->dev, "Enabling PCI device has failed: %d", err);
+ return err;
+ }
+
+ pci_set_master(pdev);
+
+ /* set up resources */
+ memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
+ res[0].start = pci_resource_start(pdev, 0);
+ res[0].end = pci_resource_end(pdev, 0);
+ res[0].name = PCI_DRIVER_NAME;
+ res[0].flags = IORESOURCE_MEM;
+ res[1].start = pci_irq_vector(pdev, 0);
+ res[1].name = PCI_DRIVER_NAME;
+ res[1].flags = IORESOURCE_IRQ;
+
+ dev_info(&pdev->dev, "EMAC physical base addr: %pa\n",
+ &res[0].start);
+
+ /* set up macb platform data */
+ memset(&plat_data, 0, sizeof(plat_data));
+
+ /* initialize clocks */
+ plat_data.pclk = clk_register_fixed_rate(&pdev->dev, "pclk", NULL, 0,
+ GEM_PCLK_RATE);
+ if (IS_ERR(plat_data.pclk)) {
+ err = PTR_ERR(plat_data.pclk);
+ goto err_pclk_register;
+ }
+
+ plat_data.hclk = clk_register_fixed_rate(&pdev->dev, "hclk", NULL, 0,
+ GEM_HCLK_RATE);
+ if (IS_ERR(plat_data.hclk)) {
+ err = PTR_ERR(plat_data.hclk);
+ goto err_hclk_register;
+ }
+
+ /* set up platform device info */
+ memset(&plat_info, 0, sizeof(plat_info));
+ plat_info.parent = &pdev->dev;
+ plat_info.fwnode = pdev->dev.fwnode;
+ plat_info.name = PLAT_DRIVER_NAME;
+ plat_info.id = pdev->devfn;
+ plat_info.res = res;
+ plat_info.num_res = ARRAY_SIZE(res);
+ plat_info.data = &plat_data;
+ plat_info.size_data = sizeof(plat_data);
+ plat_info.dma_mask = pdev->dma_mask;
+
+ /* register platform device */
+ plat_dev = platform_device_register_full(&plat_info);
+ if (IS_ERR(plat_dev)) {
+ err = PTR_ERR(plat_dev);
+ goto err_plat_dev_register;
+ }
+
+ pci_set_drvdata(pdev, plat_dev);
+
+ return 0;
+
+err_plat_dev_register:
+ clk_unregister(plat_data.hclk);
+
+err_hclk_register:
+ clk_unregister(plat_data.pclk);
+
+err_pclk_register:
+ return err;
+}
+
+static void macb_remove(struct pci_dev *pdev)
+{
+ struct platform_device *plat_dev = pci_get_drvdata(pdev);
+ struct macb_platform_data *plat_data = dev_get_platdata(&plat_dev->dev);
+
+ clk_unregister(plat_data->pclk);
+ clk_unregister(plat_data->hclk);
+ platform_device_unregister(plat_dev);
+}
+
+static const struct pci_device_id dev_id_table[] = {
+ { PCI_DEVICE(CDNS_VENDOR_ID, CDNS_DEVICE_ID), },
+ { 0, }
+};
+
+static struct pci_driver macb_pci_driver = {
+ .name = PCI_DRIVER_NAME,
+ .id_table = dev_id_table,
+ .probe = macb_probe,
+ .remove = macb_remove,
+};
+
+module_pci_driver(macb_pci_driver);
+MODULE_DEVICE_TABLE(pci, dev_id_table);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cadence NIC PCI wrapper");