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1// SPDX-License-Identifier: GPL-2.02/*3 * PCI driver for the Synopsys DesignWare DMA Controller4 *5 * Copyright (C) 2013 Intel Corporation6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>7 */8 9#include <linux/module.h>10#include <linux/pci.h>11#include <linux/device.h>12 13#include "internal.h"14 15static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)16{17 const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data;18 struct dw_dma_chip_pdata *data;19 struct dw_dma_chip *chip;20 int ret;21 22 ret = pcim_enable_device(pdev);23 if (ret)24 return ret;25 26 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));27 if (ret) {28 dev_err(&pdev->dev, "I/O memory remapping failed\n");29 return ret;30 }31 32 pci_set_master(pdev);33 pci_try_set_mwi(pdev);34 35 ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));36 if (ret)37 return ret;38 39 data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);40 if (!data)41 return -ENOMEM;42 43 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);44 if (!chip)45 return -ENOMEM;46 47 chip->dev = &pdev->dev;48 chip->id = pdev->devfn;49 chip->regs = pcim_iomap_table(pdev)[0];50 chip->irq = pdev->irq;51 chip->pdata = data->pdata;52 53 data->chip = chip;54 55 ret = data->probe(chip);56 if (ret)57 return ret;58 59 dw_dma_acpi_controller_register(chip->dw);60 61 pci_set_drvdata(pdev, data);62 63 return 0;64}65 66static void dw_pci_remove(struct pci_dev *pdev)67{68 struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev);69 struct dw_dma_chip *chip = data->chip;70 int ret;71 72 dw_dma_acpi_controller_free(chip->dw);73 74 ret = data->remove(chip);75 if (ret)76 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);77}78 79#ifdef CONFIG_PM_SLEEP80 81static int dw_pci_suspend_late(struct device *dev)82{83 struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);84 struct dw_dma_chip *chip = data->chip;85 86 return do_dw_dma_disable(chip);87};88 89static int dw_pci_resume_early(struct device *dev)90{91 struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);92 struct dw_dma_chip *chip = data->chip;93 94 return do_dw_dma_enable(chip);95};96 97#endif /* CONFIG_PM_SLEEP */98 99static const struct dev_pm_ops dw_pci_dev_pm_ops = {100 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)101};102 103static const struct pci_device_id dw_pci_id_table[] = {104 /* Medfield (GPDMA) */105 { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata },106 107 /* BayTrail */108 { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata },109 { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata },110 111 /* Merrifield */112 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata },113 114 /* Braswell */115 { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata },116 { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata },117 118 /* Elkhart Lake iDMA 32-bit (PSE DMA) */119 { PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata },120 { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata },121 { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata },122 123 /* Haswell */124 { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata },125 126 /* Broadwell */127 { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata },128 129 { }130};131MODULE_DEVICE_TABLE(pci, dw_pci_id_table);132 133static struct pci_driver dw_pci_driver = {134 .name = "dw_dmac_pci",135 .id_table = dw_pci_id_table,136 .probe = dw_pci_probe,137 .remove = dw_pci_remove,138 .driver = {139 .pm = &dw_pci_dev_pm_ops,140 },141};142 143module_pci_driver(dw_pci_driver);144 145MODULE_LICENSE("GPL v2");146MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");147MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");148