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 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) 16 { 17 const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data; 18 struct dw_dma_chip_pdata *data; 19 struct dw_dma_chip *chip; 20 int ret; 21 22 ret = pcim_enable_device(pdev); 23 if (ret) 24 return ret; 25 26 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); 27 if (ret) { 28 dev_err(&pdev->dev, "I/O memory remapping failed\n"); 29 return ret; 30 } 31 32 pci_set_master(pdev); 33 pci_try_set_mwi(pdev); 34 35 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 36 if (ret) 37 return ret; 38 39 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 40 if (ret) 41 return ret; 42 43 data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL); 44 if (!data) 45 return -ENOMEM; 46 47 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); 48 if (!chip) 49 return -ENOMEM; 50 51 chip->dev = &pdev->dev; 52 chip->id = pdev->devfn; 53 chip->regs = pcim_iomap_table(pdev)[0]; 54 chip->irq = pdev->irq; 55 chip->pdata = data->pdata; 56 57 data->chip = chip; 58 59 ret = data->probe(chip); 60 if (ret) 61 return ret; 62 63 dw_dma_acpi_controller_register(chip->dw); 64 65 pci_set_drvdata(pdev, data); 66 67 return 0; 68 } 69 70 static void dw_pci_remove(struct pci_dev *pdev) 71 { 72 struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev); 73 struct dw_dma_chip *chip = data->chip; 74 int ret; 75 76 dw_dma_acpi_controller_free(chip->dw); 77 78 ret = data->remove(chip); 79 if (ret) 80 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); 81 } 82 83 #ifdef CONFIG_PM_SLEEP 84 85 static int dw_pci_suspend_late(struct device *dev) 86 { 87 struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); 88 struct dw_dma_chip *chip = data->chip; 89 90 return do_dw_dma_disable(chip); 91 }; 92 93 static int dw_pci_resume_early(struct device *dev) 94 { 95 struct dw_dma_chip_pdata *data = dev_get_drvdata(dev); 96 struct dw_dma_chip *chip = data->chip; 97 98 return do_dw_dma_enable(chip); 99 }; 100 101 #endif /* CONFIG_PM_SLEEP */ 102 103 static const struct dev_pm_ops dw_pci_dev_pm_ops = { 104 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early) 105 }; 106 107 static const struct pci_device_id dw_pci_id_table[] = { 108 /* Medfield (GPDMA) */ 109 { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata }, 110 111 /* BayTrail */ 112 { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata }, 113 { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata }, 114 115 /* Merrifield */ 116 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata }, 117 118 /* Braswell */ 119 { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata }, 120 { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata }, 121 122 /* Elkhart Lake iDMA 32-bit (PSE DMA) */ 123 { PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&idma32_chip_pdata }, 124 { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&idma32_chip_pdata }, 125 { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&idma32_chip_pdata }, 126 127 /* Haswell */ 128 { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata }, 129 130 /* Broadwell */ 131 { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata }, 132 133 { } 134 }; 135 MODULE_DEVICE_TABLE(pci, dw_pci_id_table); 136 137 static struct pci_driver dw_pci_driver = { 138 .name = "dw_dmac_pci", 139 .id_table = dw_pci_id_table, 140 .probe = dw_pci_probe, 141 .remove = dw_pci_remove, 142 .driver = { 143 .pm = &dw_pci_dev_pm_ops, 144 }, 145 }; 146 147 module_pci_driver(dw_pci_driver); 148 149 MODULE_LICENSE("GPL v2"); 150 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); 151 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); 152