1 /* 2 * PCI driver for the Synopsys DesignWare DMA Controller 3 * 4 * Copyright (C) 2013 Intel Corporation 5 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 12 #include <linux/module.h> 13 #include <linux/pci.h> 14 #include <linux/device.h> 15 16 #include "internal.h" 17 18 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) 19 { 20 struct dw_dma_chip *chip; 21 struct dw_dma_platform_data *pdata = (void *)pid->driver_data; 22 int ret; 23 24 ret = pcim_enable_device(pdev); 25 if (ret) 26 return ret; 27 28 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); 29 if (ret) { 30 dev_err(&pdev->dev, "I/O memory remapping failed\n"); 31 return ret; 32 } 33 34 pci_set_master(pdev); 35 pci_try_set_mwi(pdev); 36 37 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 38 if (ret) 39 return ret; 40 41 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 42 if (ret) 43 return ret; 44 45 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); 46 if (!chip) 47 return -ENOMEM; 48 49 chip->dev = &pdev->dev; 50 chip->regs = pcim_iomap_table(pdev)[0]; 51 chip->irq = pdev->irq; 52 53 ret = dw_dma_probe(chip, pdata); 54 if (ret) 55 return ret; 56 57 pci_set_drvdata(pdev, chip); 58 59 return 0; 60 } 61 62 static void dw_pci_remove(struct pci_dev *pdev) 63 { 64 struct dw_dma_chip *chip = pci_get_drvdata(pdev); 65 int ret; 66 67 ret = dw_dma_remove(chip); 68 if (ret) 69 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 70 } 71 72 #ifdef CONFIG_PM_SLEEP 73 74 static int dw_pci_suspend_late(struct device *dev) 75 { 76 struct pci_dev *pci = to_pci_dev(dev); 77 struct dw_dma_chip *chip = pci_get_drvdata(pci); 78 79 return dw_dma_disable(chip); 80 }; 81 82 static int dw_pci_resume_early(struct device *dev) 83 { 84 struct pci_dev *pci = to_pci_dev(dev); 85 struct dw_dma_chip *chip = pci_get_drvdata(pci); 86 87 return dw_dma_enable(chip); 88 }; 89 90 #endif /* CONFIG_PM_SLEEP */ 91 92 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 93 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 94 }; 95 96 static const struct pci_device_id dw_pci_id_table[] = { 97 /* Medfield */ 98 { PCI_VDEVICE(INTEL, 0x0827) }, 99 { PCI_VDEVICE(INTEL, 0x0830) }, 100 101 /* BayTrail */ 102 { PCI_VDEVICE(INTEL, 0x0f06) }, 103 { PCI_VDEVICE(INTEL, 0x0f40) }, 104 105 /* Braswell */ 106 { PCI_VDEVICE(INTEL, 0x2286) }, 107 { PCI_VDEVICE(INTEL, 0x22c0) }, 108 109 /* Haswell */ 110 { PCI_VDEVICE(INTEL, 0x9c60) }, 111 { } 112 }; 113 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 114 115 static struct pci_driver dw_pci_driver = { 116 .name = "dw_dmac_pci", 117 .id_table = dw_pci_id_table, 118 .probe = dw_pci_probe, 119 .remove = dw_pci_remove, 120 .driver = { 121 .pm = &dw_pci_dev_pm_ops, 122 }, 123 }; 124 125 module_pci_driver(dw_pci_driver); 126 127 MODULE_LICENSE("GPL v2"); 128 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 129 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 130