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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 | /* * 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) }, /* Broadwell */ { PCI_VDEVICE(INTEL, 0x9ce0) }, { } }; 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>"); |