diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/dma/dw/pci.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c new file mode 100644 index 000000000..ad2d4d012 --- /dev/null +++ b/drivers/dma/dw/pci.c @@ -0,0 +1,147 @@ +// 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" + +static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) +{ + const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data; + struct dw_dma_chip_pdata *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 = dma_set_mask_and_coherent(&pdev->dev, 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; + + dw_dma_acpi_controller_register(chip->dw); + + pci_set_drvdata(pdev, data); + + return 0; +} + +static void dw_pci_remove(struct pci_dev *pdev) +{ + struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev); + struct dw_dma_chip *chip = data->chip; + int ret; + + dw_dma_acpi_controller_free(chip->dw); + + 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_chip_pdata *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_chip_pdata *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_dma_chip_pdata }, + + /* BayTrail */ + { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata }, + { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata }, + + /* Merrifield */ + { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata }, + + /* Braswell */ + { PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata }, + { PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata }, + + /* Elkhart Lake iDMA 32-bit (PSE DMA) */ + { PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata }, + { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata }, + { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata }, + + /* Haswell */ + { PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata }, + + /* Broadwell */ + { PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata }, + + { } +}; +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>"); |