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