2 * PCI driver for the Synopsys DesignWare DMA Controller
4 * Copyright (C) 2013 Intel Corporation
5 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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.
12 #include <linux/module.h>
13 #include <linux/pci.h>
14 #include <linux/device.h>
18 static struct dw_dma_platform_data mrfld_pdata = {
23 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
24 .chan_priority = CHAN_PRIORITY_ASCENDING,
28 .multi_block = {1, 1, 1, 1, 1, 1, 1, 1},
31 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
33 const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
34 struct dw_dma_chip *chip;
37 ret = pcim_enable_device(pdev);
41 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
43 dev_err(&pdev->dev, "I/O memory remapping failed\n");
48 pci_try_set_mwi(pdev);
50 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
54 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
58 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
62 chip->dev = &pdev->dev;
63 chip->id = pdev->devfn;
64 chip->regs = pcim_iomap_table(pdev)[0];
65 chip->irq = pdev->irq;
68 ret = dw_dma_probe(chip);
72 pci_set_drvdata(pdev, chip);
77 static void dw_pci_remove(struct pci_dev *pdev)
79 struct dw_dma_chip *chip = pci_get_drvdata(pdev);
82 ret = dw_dma_remove(chip);
84 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
87 #ifdef CONFIG_PM_SLEEP
89 static int dw_pci_suspend_late(struct device *dev)
91 struct pci_dev *pci = to_pci_dev(dev);
92 struct dw_dma_chip *chip = pci_get_drvdata(pci);
94 return dw_dma_disable(chip);
97 static int dw_pci_resume_early(struct device *dev)
99 struct pci_dev *pci = to_pci_dev(dev);
100 struct dw_dma_chip *chip = pci_get_drvdata(pci);
102 return dw_dma_enable(chip);
105 #endif /* CONFIG_PM_SLEEP */
107 static const struct dev_pm_ops dw_pci_dev_pm_ops = {
108 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
111 static const struct pci_device_id dw_pci_id_table[] = {
112 /* Medfield (GPDMA) */
113 { PCI_VDEVICE(INTEL, 0x0827) },
116 { PCI_VDEVICE(INTEL, 0x0f06) },
117 { PCI_VDEVICE(INTEL, 0x0f40) },
119 /* Merrifield iDMA 32-bit (GPDMA) */
120 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
123 { PCI_VDEVICE(INTEL, 0x2286) },
124 { PCI_VDEVICE(INTEL, 0x22c0) },
127 { PCI_VDEVICE(INTEL, 0x9c60) },
130 { PCI_VDEVICE(INTEL, 0x9ce0) },
134 MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
136 static struct pci_driver dw_pci_driver = {
137 .name = "dw_dmac_pci",
138 .id_table = dw_pci_id_table,
139 .probe = dw_pci_probe,
140 .remove = dw_pci_remove,
142 .pm = &dw_pci_dev_pm_ops,
146 module_pci_driver(dw_pci_driver);
148 MODULE_LICENSE("GPL v2");
149 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
150 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");