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 struct dw_dma_platform_data dw_pci_pdata = { 19 .is_private = 1, 20 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, 21 .chan_priority = CHAN_PRIORITY_ASCENDING, 22 }; 23 24 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) 25 { 26 struct dw_dma_chip *chip; 27 struct dw_dma_platform_data *pdata = (void *)pid->driver_data; 28 int ret; 29 30 ret = pcim_enable_device(pdev); 31 if (ret) 32 return ret; 33 34 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); 35 if (ret) { 36 dev_err(&pdev->dev, "I/O memory remapping failed\n"); 37 return ret; 38 } 39 40 pci_set_master(pdev); 41 pci_try_set_mwi(pdev); 42 43 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 44 if (ret) 45 return ret; 46 47 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 48 if (ret) 49 return ret; 50 51 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); 52 if (!chip) 53 return -ENOMEM; 54 55 chip->dev = &pdev->dev; 56 chip->regs = pcim_iomap_table(pdev)[0]; 57 chip->irq = pdev->irq; 58 59 ret = dw_dma_probe(chip, pdata); 60 if (ret) 61 return ret; 62 63 pci_set_drvdata(pdev, chip); 64 65 return 0; 66 } 67 68 static void dw_pci_remove(struct pci_dev *pdev) 69 { 70 struct dw_dma_chip *chip = pci_get_drvdata(pdev); 71 int ret; 72 73 ret = dw_dma_remove(chip); 74 if (ret) 75 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 76 } 77 78 #ifdef CONFIG_PM_SLEEP 79 80 static int dw_pci_suspend_late(struct device *dev) 81 { 82 struct pci_dev *pci = to_pci_dev(dev); 83 struct dw_dma_chip *chip = pci_get_drvdata(pci); 84 85 return dw_dma_suspend(chip); 86 }; 87 88 static int dw_pci_resume_early(struct device *dev) 89 { 90 struct pci_dev *pci = to_pci_dev(dev); 91 struct dw_dma_chip *chip = pci_get_drvdata(pci); 92 93 return dw_dma_resume(chip); 94 }; 95 96 #endif /* CONFIG_PM_SLEEP */ 97 98 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 99 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 100 }; 101 102 static const struct pci_device_id dw_pci_id_table[] = { 103 /* Medfield */ 104 { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, 105 { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, 106 107 /* BayTrail */ 108 { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, 109 { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, 110 111 /* Haswell */ 112 { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata }, 113 { } 114 }; 115 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 116 117 static struct pci_driver dw_pci_driver = { 118 .name = "dw_dmac_pci", 119 .id_table = dw_pci_id_table, 120 .probe = dw_pci_probe, 121 .remove = dw_pci_remove, 122 .driver = { 123 .pm = &dw_pci_dev_pm_ops, 124 }, 125 }; 126 127 module_pci_driver(dw_pci_driver); 128 129 MODULE_LICENSE("GPL v2"); 130 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 131 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 132