text: /*
   * PCI driver for the Synopsys DesignWare DMA Controller
   *
   * Copyright (C) 2013 Intel Corporation
   * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   */
  
  #include <linux/module.h>
  #include <linux/pci.h>
  #include <linux/device.h>
  
  #include "internal.h"
  
  static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
  {
  	struct dw_dma_chip *chip;
  	struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
  	int ret;
  
  	ret = pcim_enable_device(pdev);
  	if (ret)
  		return ret;
  
  	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
  	if (ret) {
  		dev_err(&pdev->dev, "I/O memory remapping failed\n");
  		return ret;
  	}
  
  	pci_set_master(pdev);
  	pci_try_set_mwi(pdev);
  
  	ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
  	if (ret)
  		return ret;
  
  	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
  	if (ret)
  		return ret;
  
  	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
  	if (!chip)
  		return -ENOMEM;
  
  	chip->dev = &pdev->dev;
  	chip->regs = pcim_iomap_table(pdev)[0];
  	chip->irq = pdev->irq;
  
  	ret = dw_dma_probe(chip, pdata);
  	if (ret)
  		return ret;
  
  	pci_set_drvdata(pdev, chip);
  
  	return 0;
  }
  
  static void dw_pci_remove(struct pci_dev *pdev)
  {
  	struct dw_dma_chip *chip = pci_get_drvdata(pdev);
  	int ret;
  
  	ret = dw_dma_remove(chip);
  	if (ret)
  		dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
  }
  
  #ifdef CONFIG_PM_SLEEP
  
  static int dw_pci_suspend_late(struct device *dev)
  {
  	struct pci_dev *pci = to_pci_dev(dev);
  	struct dw_dma_chip *chip = pci_get_drvdata(pci);
  
  	return dw_dma_disable(chip);
  };
  
  static int dw_pci_resume_early(struct device *dev)
  {
  	struct pci_dev *pci = to_pci_dev(dev);
  	struct dw_dma_chip *chip = pci_get_drvdata(pci);
  
  	return dw_dma_enable(chip);
  };
  
  #endif /* CONFIG_PM_SLEEP */
  
  static const struct dev_pm_ops dw_pci_dev_pm_ops = {
  	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
  };
  
  static const struct pci_device_id dw_pci_id_table[] = {
  	/* Medfield */
  	{ PCI_VDEVICE(INTEL, 0x0827) },
  	{ PCI_VDEVICE(INTEL, 0x0830) },
  
  	/* BayTrail */
  	{ PCI_VDEVICE(INTEL, 0x0f06) },
  	{ PCI_VDEVICE(INTEL, 0x0f40) },
  
  	/* Braswell */
  	{ PCI_VDEVICE(INTEL, 0x2286) },
  	{ PCI_VDEVICE(INTEL, 0x22c0) },
  
  	/* Haswell */
  	{ PCI_VDEVICE(INTEL, 0x9c60) },
  
  	/* Broadwell */
  	{ PCI_VDEVICE(INTEL, 0x9ce0) },
  
  	{ }
  };
  MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
  
  static struct pci_driver dw_pci_driver = {
  	.name		= "dw_dmac_pci",
  	.id_table	= dw_pci_id_table,
  	.probe		= dw_pci_probe,
  	.remove		= dw_pci_remove,
  	.driver	= {
  		.pm	= &dw_pci_dev_pm_ops,
  	},
  };
  
  module_pci_driver(dw_pci_driver);
  
  MODULE_LICENSE("GPL v2");
  MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
  MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
  