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152 lines
3.3 KiB
152 lines
3.3 KiB
// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) |
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/* Copyright 2019 NXP */ |
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#include <linux/module.h> |
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#include <linux/of.h> |
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#include <linux/fsl/ptp_qoriq.h> |
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#include "enetc.h" |
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int enetc_phc_index = -1; |
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EXPORT_SYMBOL(enetc_phc_index); |
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static struct ptp_clock_info enetc_ptp_caps = { |
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.owner = THIS_MODULE, |
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.name = "ENETC PTP clock", |
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.max_adj = 512000, |
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.n_alarm = 0, |
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.n_ext_ts = 2, |
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.n_per_out = 0, |
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.n_pins = 0, |
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.pps = 1, |
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.adjfine = ptp_qoriq_adjfine, |
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.adjtime = ptp_qoriq_adjtime, |
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.gettime64 = ptp_qoriq_gettime, |
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.settime64 = ptp_qoriq_settime, |
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.enable = ptp_qoriq_enable, |
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}; |
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static int enetc_ptp_probe(struct pci_dev *pdev, |
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const struct pci_device_id *ent) |
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{ |
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struct ptp_qoriq *ptp_qoriq; |
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void __iomem *base; |
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int err, len, n; |
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if (pdev->dev.of_node && !of_device_is_available(pdev->dev.of_node)) { |
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dev_info(&pdev->dev, "device is disabled, skipping\n"); |
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return -ENODEV; |
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} |
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err = pci_enable_device_mem(pdev); |
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if (err) { |
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dev_err(&pdev->dev, "device enable failed\n"); |
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return err; |
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} |
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/* set up for high or low dma */ |
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err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); |
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if (err) { |
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err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); |
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if (err) { |
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dev_err(&pdev->dev, |
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"DMA configuration failed: 0x%x\n", err); |
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goto err_dma; |
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} |
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} |
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err = pci_request_mem_regions(pdev, KBUILD_MODNAME); |
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if (err) { |
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dev_err(&pdev->dev, "pci_request_regions failed err=%d\n", err); |
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goto err_pci_mem_reg; |
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} |
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pci_set_master(pdev); |
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ptp_qoriq = kzalloc(sizeof(*ptp_qoriq), GFP_KERNEL); |
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if (!ptp_qoriq) { |
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err = -ENOMEM; |
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goto err_alloc_ptp; |
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} |
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len = pci_resource_len(pdev, ENETC_BAR_REGS); |
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base = ioremap(pci_resource_start(pdev, ENETC_BAR_REGS), len); |
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if (!base) { |
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err = -ENXIO; |
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dev_err(&pdev->dev, "ioremap() failed\n"); |
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goto err_ioremap; |
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} |
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/* Allocate 1 interrupt */ |
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n = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSIX); |
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if (n != 1) { |
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err = -EPERM; |
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goto err_irq_vectors; |
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} |
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ptp_qoriq->irq = pci_irq_vector(pdev, 0); |
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err = request_irq(ptp_qoriq->irq, ptp_qoriq_isr, 0, DRIVER, ptp_qoriq); |
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if (err) { |
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dev_err(&pdev->dev, "request_irq() failed!\n"); |
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goto err_irq; |
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} |
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ptp_qoriq->dev = &pdev->dev; |
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err = ptp_qoriq_init(ptp_qoriq, base, &enetc_ptp_caps); |
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if (err) |
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goto err_no_clock; |
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enetc_phc_index = ptp_qoriq->phc_index; |
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pci_set_drvdata(pdev, ptp_qoriq); |
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return 0; |
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err_no_clock: |
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free_irq(ptp_qoriq->irq, ptp_qoriq); |
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err_irq: |
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pci_free_irq_vectors(pdev); |
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err_irq_vectors: |
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iounmap(base); |
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err_ioremap: |
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kfree(ptp_qoriq); |
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err_alloc_ptp: |
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pci_release_mem_regions(pdev); |
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err_pci_mem_reg: |
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err_dma: |
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pci_disable_device(pdev); |
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return err; |
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} |
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static void enetc_ptp_remove(struct pci_dev *pdev) |
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{ |
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struct ptp_qoriq *ptp_qoriq = pci_get_drvdata(pdev); |
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enetc_phc_index = -1; |
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ptp_qoriq_free(ptp_qoriq); |
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pci_free_irq_vectors(pdev); |
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kfree(ptp_qoriq); |
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pci_release_mem_regions(pdev); |
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pci_disable_device(pdev); |
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} |
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static const struct pci_device_id enetc_ptp_id_table[] = { |
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{ PCI_DEVICE(PCI_VENDOR_ID_FREESCALE, ENETC_DEV_ID_PTP) }, |
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{ 0, } /* End of table. */ |
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}; |
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MODULE_DEVICE_TABLE(pci, enetc_ptp_id_table); |
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static struct pci_driver enetc_ptp_driver = { |
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.name = KBUILD_MODNAME, |
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.id_table = enetc_ptp_id_table, |
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.probe = enetc_ptp_probe, |
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.remove = enetc_ptp_remove, |
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}; |
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module_pci_driver(enetc_ptp_driver); |
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MODULE_DESCRIPTION("ENETC PTP clock driver"); |
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MODULE_LICENSE("Dual BSD/GPL");
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