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151 lines
3.6 KiB
151 lines
3.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* PCI driver for the Synopsys DesignWare DMA Controller |
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* |
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* Copyright (C) 2013 Intel Corporation |
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* Author: Andy Shevchenko <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/pci.h> |
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#include <linux/device.h> |
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#include "internal.h" |
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static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) |
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{ |
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const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data; |
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struct dw_dma_chip_pdata *data; |
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struct dw_dma_chip *chip; |
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int ret; |
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ret = pcim_enable_device(pdev); |
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if (ret) |
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return ret; |
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ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); |
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if (ret) { |
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dev_err(&pdev->dev, "I/O memory remapping failed\n"); |
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return ret; |
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} |
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pci_set_master(pdev); |
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pci_try_set_mwi(pdev); |
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ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
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if (ret) |
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return ret; |
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ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
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if (ret) |
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return ret; |
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data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL); |
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if (!data) |
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return -ENOMEM; |
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chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); |
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if (!chip) |
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return -ENOMEM; |
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chip->dev = &pdev->dev; |
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chip->id = pdev->devfn; |
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chip->regs = pcim_iomap_table(pdev)[0]; |
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chip->irq = pdev->irq; |
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chip->pdata = data->pdata; |
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data->chip = chip; |
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ret = data->probe(chip); |
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if (ret) |
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return ret; |
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dw_dma_acpi_controller_register(chip->dw); |
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pci_set_drvdata(pdev, data); |
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return 0; |
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} |
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static void dw_pci_remove(struct pci_dev *pdev) |
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{ |
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struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev); |
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struct dw_dma_chip *chip = data->chip; |
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int ret; |
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dw_dma_acpi_controller_free(chip->dw); |
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ret = data->remove(chip); |
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if (ret) |
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dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); |
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} |
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#ifdef CONFIG_PM_SLEEP |
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static int dw_pci_suspend_late(struct device *dev) |
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{ |
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struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); |
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struct dw_dma_chip *chip = data->chip; |
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return do_dw_dma_disable(chip); |
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}; |
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static int dw_pci_resume_early(struct device *dev) |
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{ |
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struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); |
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struct dw_dma_chip *chip = data->chip; |
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return do_dw_dma_enable(chip); |
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}; |
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#endif /* CONFIG_PM_SLEEP */ |
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static const struct dev_pm_ops dw_pci_dev_pm_ops = { |
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SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) |
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}; |
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static const struct pci_device_id dw_pci_id_table[] = { |
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/* Medfield (GPDMA) */ |
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{ PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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/* BayTrail */ |
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{ PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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{ PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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/* Merrifield */ |
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{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata }, |
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/* Braswell */ |
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{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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{ PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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/* Elkhart Lake iDMA 32-bit (PSE DMA) */ |
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{ PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata }, |
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{ PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata }, |
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{ PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata }, |
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/* Haswell */ |
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{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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/* Broadwell */ |
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{ PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(pci, dw_pci_id_table); |
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static struct pci_driver dw_pci_driver = { |
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.name = "dw_dmac_pci", |
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.id_table = dw_pci_id_table, |
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.probe = dw_pci_probe, |
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.remove = dw_pci_remove, |
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.driver = { |
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.pm = &dw_pci_dev_pm_ops, |
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}, |
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}; |
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module_pci_driver(dw_pci_driver); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); |
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MODULE_AUTHOR("Andy Shevchenko <[email protected]>");
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