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 const struct dw_dma_platform_data *pdata = (void *)pid->driver_data; 21 struct dw_dma_chip *chip; 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->id = pdev->devfn; 51 chip->regs = pcim_iomap_table(pdev)[0]; 52 chip->irq = pdev->irq; 53 chip->pdata = pdata; 54 55 ret = dw_dma_probe(chip); 56 if (ret) 57 return ret; 58 59 pci_set_drvdata(pdev, chip); 60 61 return 0; 62 } 63 64 static void dw_pci_remove(struct pci_dev *pdev) 65 { 66 struct dw_dma_chip *chip = pci_get_drvdata(pdev); 67 int ret; 68 69 ret = dw_dma_remove(chip); 70 if (ret) 71 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 72 } 73 74 #ifdef CONFIG_PM_SLEEP 75 76 static int dw_pci_suspend_late(struct device *dev) 77 { 78 struct pci_dev *pci = to_pci_dev(dev); 79 struct dw_dma_chip *chip = pci_get_drvdata(pci); 80 81 return dw_dma_disable(chip); 82 }; 83 84 static int dw_pci_resume_early(struct device *dev) 85 { 86 struct pci_dev *pci = to_pci_dev(dev); 87 struct dw_dma_chip *chip = pci_get_drvdata(pci); 88 89 return dw_dma_enable(chip); 90 }; 91 92 #endif /* CONFIG_PM_SLEEP */ 93 94 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 95 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 96 }; 97 98 static const struct pci_device_id dw_pci_id_table[] = { 99 /* Medfield (GPDMA) */ 100 { PCI_VDEVICE(INTEL, 0x0827) }, 101 102 /* BayTrail */ 103 { PCI_VDEVICE(INTEL, 0x0f06) }, 104 { PCI_VDEVICE(INTEL, 0x0f40) }, 105 106 /* Braswell */ 107 { PCI_VDEVICE(INTEL, 0x2286) }, 108 { PCI_VDEVICE(INTEL, 0x22c0) }, 109 110 /* Haswell */ 111 { PCI_VDEVICE(INTEL, 0x9c60) }, 112 113 /* Broadwell */ 114 { PCI_VDEVICE(INTEL, 0x9ce0) }, 115 116 { } 117 }; 118 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 119 120 static struct pci_driver dw_pci_driver = { 121 .name = "dw_dmac_pci", 122 .id_table = dw_pci_id_table, 123 .probe = dw_pci_probe, 124 .remove = dw_pci_remove, 125 .driver = { 126 .pm = &dw_pci_dev_pm_ops, 127 }, 128 }; 129 130 module_pci_driver(dw_pci_driver); 131 132 MODULE_LICENSE("GPL v2"); 133 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 134 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 135