1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * PCI driver for the Synopsys DesignWare DMA Controller 4 * 5 * Copyright (C) 2013 Intel Corporation 6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> 7 */ 8 9 #include <linux/module.h> 10 #include <linux/pci.h> 11 #include <linux/device.h> 12 13 #include "internal.h" 14 15 struct dw_dma_pci_data { 16 const struct dw_dma_platform_data *pdata; 17 int (*probe)(struct dw_dma_chip *chip); 18 }; 19 20 static const struct dw_dma_pci_data dw_pci_data = { 21 .probe = dw_dma_probe, 22 }; 23 24 static const struct dw_dma_platform_data idma32_pdata = { 25 .nr_channels = 8, 26 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, 27 .chan_priority = CHAN_PRIORITY_ASCENDING, 28 .block_size = 131071, 29 .nr_masters = 1, 30 .data_width = {4}, 31 .multi_block = {1, 1, 1, 1, 1, 1, 1, 1}, 32 }; 33 34 static const struct dw_dma_pci_data idma32_pci_data = { 35 .pdata = &idma32_pdata, 36 .probe = idma32_dma_probe, 37 }; 38 39 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) 40 { 41 const struct dw_dma_pci_data *data = (void *)pid->driver_data; 42 struct dw_dma_chip *chip; 43 int ret; 44 45 ret = pcim_enable_device(pdev); 46 if (ret) 47 return ret; 48 49 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); 50 if (ret) { 51 dev_err(&pdev->dev, "I/O memory remapping failed\n"); 52 return ret; 53 } 54 55 pci_set_master(pdev); 56 pci_try_set_mwi(pdev); 57 58 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 59 if (ret) 60 return ret; 61 62 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 63 if (ret) 64 return ret; 65 66 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); 67 if (!chip) 68 return -ENOMEM; 69 70 chip->dev = &pdev->dev; 71 chip->id = pdev->devfn; 72 chip->regs = pcim_iomap_table(pdev)[0]; 73 chip->irq = pdev->irq; 74 chip->pdata = data->pdata; 75 76 ret = data->probe(chip); 77 if (ret) 78 return ret; 79 80 pci_set_drvdata(pdev, chip); 81 82 return 0; 83 } 84 85 static void dw_pci_remove(struct pci_dev *pdev) 86 { 87 struct dw_dma_chip *chip = pci_get_drvdata(pdev); 88 int ret; 89 90 ret = dw_dma_remove(chip); 91 if (ret) 92 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 93 } 94 95 #ifdef CONFIG_PM_SLEEP 96 97 static int dw_pci_suspend_late(struct device *dev) 98 { 99 struct pci_dev *pci = to_pci_dev(dev); 100 struct dw_dma_chip *chip = pci_get_drvdata(pci); 101 102 return do_dw_dma_disable(chip); 103 }; 104 105 static int dw_pci_resume_early(struct device *dev) 106 { 107 struct pci_dev *pci = to_pci_dev(dev); 108 struct dw_dma_chip *chip = pci_get_drvdata(pci); 109 110 return do_dw_dma_enable(chip); 111 }; 112 113 #endif /* CONFIG_PM_SLEEP */ 114 115 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 116 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 117 }; 118 119 static const struct pci_device_id dw_pci_id_table[] = { 120 /* Medfield (GPDMA) */ 121 { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_data }, 122 123 /* BayTrail */ 124 { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_data }, 125 { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_data }, 126 127 /* Merrifield */ 128 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_pci_data }, 129 130 /* Braswell */ 131 { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_data }, 132 { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_data }, 133 134 /* Haswell */ 135 { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_data }, 136 137 /* Broadwell */ 138 { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_pci_data }, 139 140 { } 141 }; 142 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 143 144 static struct pci_driver dw_pci_driver = { 145 .name = "dw_dmac_pci", 146 .id_table = dw_pci_id_table, 147 .probe = dw_pci_probe, 148 .remove = dw_pci_remove, 149 .driver = { 150 .pm = &dw_pci_dev_pm_ops, 151 }, 152 }; 153 154 module_pci_driver(dw_pci_driver); 155 156 MODULE_LICENSE("GPL v2"); 157 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 158 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 159