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-rw-r--r--drivers/dma/dw/pci.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/drivers/dma/dw/pci.c b/drivers/dma/dw/pci.c
new file mode 100644
index 000000000..1142aa6f8
--- /dev/null
+++ b/drivers/dma/dw/pci.c
@@ -0,0 +1,151 @@
+// 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 = 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;
+
+ 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)&idma32_chip_pdata },
+ { PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&idma32_chip_pdata },
+ { PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&idma32_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>");