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 mrfld_pdata = { 19 .nr_channels = 8, 20 .is_private = true, 21 .is_memcpy = true, 22 .is_idma32 = true, 23 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, 24 .chan_priority = CHAN_PRIORITY_ASCENDING, 25 .block_size = 131071, 26 .nr_masters = 1, 27 .data_width = {4}, 28 }; 29 30 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) 31 { 32 const struct dw_dma_platform_data *pdata = (void *)pid->driver_data; 33 struct dw_dma_chip *chip; 34 int ret; 35 36 ret = pcim_enable_device(pdev); 37 if (ret) 38 return ret; 39 40 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); 41 if (ret) { 42 dev_err(&pdev->dev, "I/O memory remapping failed\n"); 43 return ret; 44 } 45 46 pci_set_master(pdev); 47 pci_try_set_mwi(pdev); 48 49 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 50 if (ret) 51 return ret; 52 53 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 54 if (ret) 55 return ret; 56 57 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); 58 if (!chip) 59 return -ENOMEM; 60 61 chip->dev = &pdev->dev; 62 chip->id = pdev->devfn; 63 chip->regs = pcim_iomap_table(pdev)[0]; 64 chip->irq = pdev->irq; 65 chip->pdata = pdata; 66 67 ret = dw_dma_probe(chip); 68 if (ret) 69 return ret; 70 71 pci_set_drvdata(pdev, chip); 72 73 return 0; 74 } 75 76 static void dw_pci_remove(struct pci_dev *pdev) 77 { 78 struct dw_dma_chip *chip = pci_get_drvdata(pdev); 79 int ret; 80 81 ret = dw_dma_remove(chip); 82 if (ret) 83 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 84 } 85 86 #ifdef CONFIG_PM_SLEEP 87 88 static int dw_pci_suspend_late(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_disable(chip); 94 }; 95 96 static int dw_pci_resume_early(struct device *dev) 97 { 98 struct pci_dev *pci = to_pci_dev(dev); 99 struct dw_dma_chip *chip = pci_get_drvdata(pci); 100 101 return dw_dma_enable(chip); 102 }; 103 104 #endif /* CONFIG_PM_SLEEP */ 105 106 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 107 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 108 }; 109 110 static const struct pci_device_id dw_pci_id_table[] = { 111 /* Medfield (GPDMA) */ 112 { PCI_VDEVICE(INTEL, 0x0827) }, 113 114 /* BayTrail */ 115 { PCI_VDEVICE(INTEL, 0x0f06) }, 116 { PCI_VDEVICE(INTEL, 0x0f40) }, 117 118 /* Merrifield iDMA 32-bit (GPDMA) */ 119 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata }, 120 121 /* Braswell */ 122 { PCI_VDEVICE(INTEL, 0x2286) }, 123 { PCI_VDEVICE(INTEL, 0x22c0) }, 124 125 /* Haswell */ 126 { PCI_VDEVICE(INTEL, 0x9c60) }, 127 128 /* Broadwell */ 129 { PCI_VDEVICE(INTEL, 0x9ce0) }, 130 131 { } 132 }; 133 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 134 135 static struct pci_driver dw_pci_driver = { 136 .name = "dw_dmac_pci", 137 .id_table = dw_pci_id_table, 138 .probe = dw_pci_probe, 139 .remove = dw_pci_remove, 140 .driver = { 141 .pm = &dw_pci_dev_pm_ops, 142 }, 143 }; 144 145 module_pci_driver(dw_pci_driver); 146 147 MODULE_LICENSE("GPL v2"); 148 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 149 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 150