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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 | /* * PCI driver for the Synopsys DesignWare DMA Controller * * Copyright (C) 2013 Intel Corporation * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #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) { struct dw_dma_chip *chip; struct dw_dma_platform_data *pdata = (void *)pid->driver_data; 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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); if (ret) return ret; ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); if (ret) return ret; chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); if (!chip) return -ENOMEM; chip->dev = &pdev->dev; chip->regs = pcim_iomap_table(pdev)[0]; chip->irq = pdev->irq; ret = dw_dma_probe(chip, pdata); if (ret) return ret; pci_set_drvdata(pdev, chip); return 0; } static void dw_pci_remove(struct pci_dev *pdev) { struct dw_dma_chip *chip = pci_get_drvdata(pdev); int ret; ret = dw_dma_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 pci_dev *pci = to_pci_dev(dev); struct dw_dma_chip *chip = pci_get_drvdata(pci); return dw_dma_disable(chip); }; static int dw_pci_resume_early(struct device *dev) { struct pci_dev *pci = to_pci_dev(dev); struct dw_dma_chip *chip = pci_get_drvdata(pci); return 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 */ { PCI_VDEVICE(INTEL, 0x0827) }, { PCI_VDEVICE(INTEL, 0x0830) }, /* BayTrail */ { PCI_VDEVICE(INTEL, 0x0f06) }, { PCI_VDEVICE(INTEL, 0x0f40) }, /* Braswell */ { PCI_VDEVICE(INTEL, 0x2286) }, { PCI_VDEVICE(INTEL, 0x22c0) }, /* Haswell */ { PCI_VDEVICE(INTEL, 0x9c60) }, { } }; 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>"); |