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 #else /* !CONFIG_PM_SLEEP */ 97 98 #define dw_pci_suspend_late NULL 99 #define dw_pci_resume_early NULL 100 101 #endif /* !CONFIG_PM_SLEEP */ 102 103 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 104 .suspend_late = dw_pci_suspend_late, 105 .resume_early = dw_pci_resume_early, 106 }; 107 108 static DEFINE_PCI_DEVICE_TABLE(dw_pci_id_table) = { 109 /* Medfield */ 110 { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, 111 { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, 112 113 /* BayTrail */ 114 { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, 115 { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, 116 117 /* Haswell */ 118 { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_pdata }, 119 { } 120 }; 121 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 122 123 static struct pci_driver dw_pci_driver = { 124 .name = "dw_dmac_pci", 125 .id_table = dw_pci_id_table, 126 .probe = dw_pci_probe, 127 .remove = dw_pci_remove, 128 .driver = { 129 .pm = &dw_pci_dev_pm_ops, 130 }, 131 }; 132 133 module_pci_driver(dw_pci_driver); 134 135 MODULE_LICENSE("GPL v2"); 136 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 137 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 138