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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 | // SPDX-License-Identifier: GPL-2.0 /* * PCI driver for the Synopsys DesignWare DMA Controller * * Copyright (C) 2013 Intel Corporation * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> */ #include <linux/module.h> #include <linux/pci.h> #include <linux/device.h> #include "internal.h" static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) { const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data; struct dw_dma_chip_pdata *data; struct dw_dma_chip *chip; int ret; ret = pcim_enable_device(pdev); if (ret) return ret; ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); if (ret) { dev_err(&pdev->dev, "I/O memory remapping failed\n"); return ret; } pci_set_master(pdev); pci_try_set_mwi(pdev); ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); if (ret) return ret; data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL); if (!data) return -ENOMEM; chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; chip->dev = &pdev->dev; chip->id = pdev->devfn; chip->regs = pcim_iomap_table(pdev)[0]; chip->irq = pdev->irq; chip->pdata = data->pdata; data->chip = chip; ret = data->probe(chip); if (ret) return ret; dw_dma_acpi_controller_register(chip->dw); pci_set_drvdata(pdev, data); return 0; } static void dw_pci_remove(struct pci_dev *pdev) { struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev); struct dw_dma_chip *chip = data->chip; int ret; dw_dma_acpi_controller_free(chip->dw); ret = data->remove(chip); if (ret) dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); } #ifdef CONFIG_PM_SLEEP static int dw_pci_suspend_late(struct device *dev) { struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); struct dw_dma_chip *chip = data->chip; return do_dw_dma_disable(chip); }; static int dw_pci_resume_early(struct device *dev) { struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); struct dw_dma_chip *chip = data->chip; return do_dw_dma_enable(chip); }; #endif /* CONFIG_PM_SLEEP */ static const struct dev_pm_ops dw_pci_dev_pm_ops = { SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) }; static const struct pci_device_id dw_pci_id_table[] = { /* Medfield (GPDMA) */ { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata }, /* BayTrail */ { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata }, { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata }, /* Merrifield */ { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata }, /* Braswell */ { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata }, { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata }, /* Elkhart Lake iDMA 32-bit (PSE DMA) */ { PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata }, { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata }, { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata }, /* Haswell */ { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata }, /* Broadwell */ { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata }, { } }; MODULE_DEVICE_TABLE(pci, dw_pci_id_table); static struct pci_driver dw_pci_driver = { .name = "dw_dmac_pci", .id_table = dw_pci_id_table, .probe = dw_pci_probe, .remove = dw_pci_remove, .driver = { .pm = &dw_pci_dev_pm_ops, }, }; module_pci_driver(dw_pci_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); |