150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
/*
|
|
* 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 struct dw_dma_platform_data mrfld_pdata = {
|
|
.nr_channels = 8,
|
|
.is_private = true,
|
|
.is_memcpy = true,
|
|
.is_idma32 = true,
|
|
.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
|
|
.chan_priority = CHAN_PRIORITY_ASCENDING,
|
|
.block_size = 131071,
|
|
.nr_masters = 1,
|
|
.data_width = {4},
|
|
};
|
|
|
|
static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
|
|
{
|
|
const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
|
|
struct dw_dma_chip *chip;
|
|
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->id = pdev->devfn;
|
|
chip->regs = pcim_iomap_table(pdev)[0];
|
|
chip->irq = pdev->irq;
|
|
chip->pdata = pdata;
|
|
|
|
ret = dw_dma_probe(chip);
|
|
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 (GPDMA) */
|
|
{ PCI_VDEVICE(INTEL, 0x0827) },
|
|
|
|
/* BayTrail */
|
|
{ PCI_VDEVICE(INTEL, 0x0f06) },
|
|
{ PCI_VDEVICE(INTEL, 0x0f40) },
|
|
|
|
/* Merrifield iDMA 32-bit (GPDMA) */
|
|
{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
|
|
|
|
/* 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>");
|