| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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>"); |