// SPDX-License-Identifier: GPL-2.0 /* * PCI driver for the Synopsys DesignWare DMA Controller * * Copyright (C) 2013 Intel Corporation * Author: Andy Shevchenko */ #include #include #include #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 (PSE 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 ");