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// SPDX-License-Identifier: GPL-2.0
/*
* PCI driver for the Synopsys DesignWare DMA Controller
*
* Copyright (C) 2013 Intel Corporation
* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
*/
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/device.h>
#include "internal.h"
struct dw_dma_pci_data {
const struct dw_dma_platform_data *pdata;
int (*probe)(struct dw_dma_chip *chip);
int (*remove)(struct dw_dma_chip *chip);
struct dw_dma_chip *chip;
};
static const struct dw_dma_pci_data dw_pci_data = {
.probe = dw_dma_probe,
.remove = dw_dma_remove,
};
static const struct dw_dma_platform_data idma32_pdata = {
.nr_channels = 8,
.chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
.chan_priority = CHAN_PRIORITY_ASCENDING,
.block_size = 131071,
.nr_masters = 1,
.data_width = {4},
.multi_block = {1, 1, 1, 1, 1, 1, 1, 1},
};
static const struct dw_dma_pci_data idma32_pci_data = {
.pdata = &idma32_pdata,
.probe = idma32_dma_probe,
.remove = idma32_dma_remove,
};
static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
{
const struct dw_dma_pci_data *drv_data = (void *)pid->driver_data;
struct dw_dma_pci_data *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;
data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
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 = data->pdata;
data->chip = chip;
ret = data->probe(chip);
if (ret)
return ret;
pci_set_drvdata(pdev, data);
return 0;
}
static void dw_pci_remove(struct pci_dev *pdev)
{
struct dw_dma_pci_data *data = pci_get_drvdata(pdev);
struct dw_dma_chip *chip = data->chip;
int ret;
ret = data->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 dw_dma_pci_data *data = dev_get_drvdata(dev);
struct dw_dma_chip *chip = data->chip;
return do_dw_dma_disable(chip);
};
static int dw_pci_resume_early(struct device *dev)
{
struct dw_dma_pci_data *data = dev_get_drvdata(dev);
struct dw_dma_chip *chip = data->chip;
return do_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), (kernel_ulong_t)&dw_pci_data },
/* BayTrail */
{ PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_data },
{ PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_data },
/* Merrifield */
{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_pci_data },
/* Braswell */
{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_pci_data },
{ PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_pci_data },
/* Elkhart Lake iDMA 32-bit (OSE DMA) */
{ PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&idma32_pci_data },
{ PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&idma32_pci_data },
{ PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&idma32_pci_data },
/* Haswell */
{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_pci_data },
/* Broadwell */
{ PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_pci_data },
{ }
};
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>");
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