| Andy Shevchenko | fed42c1 | 2013-06-05 15:26:46 +0300 | [diff] [blame] | 1 | /* |
| 2 | * PCI driver for the Synopsys DesignWare DMA Controller |
| 3 | * |
| 4 | * Copyright (C) 2013 Intel Corporation |
| 5 | * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify |
| 8 | * it under the terms of the GNU General Public License version 2 as |
| 9 | * published by the Free Software Foundation. |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
| 13 | #include <linux/pci.h> |
| 14 | #include <linux/device.h> |
| 15 | |
| 16 | #include "internal.h" |
| 17 | |
| 18 | static struct dw_dma_platform_data dw_pci_pdata = { |
| 19 | .is_private = 1, |
| 20 | .chan_allocation_order = CHAN_ALLOCATION_ASCENDING, |
| 21 | .chan_priority = CHAN_PRIORITY_ASCENDING, |
| 22 | }; |
| 23 | |
| 24 | static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid) |
| 25 | { |
| 26 | struct dw_dma_chip *chip; |
| 27 | struct dw_dma_platform_data *pdata = (void *)pid->driver_data; |
| 28 | int ret; |
| 29 | |
| 30 | ret = pcim_enable_device(pdev); |
| 31 | if (ret) |
| 32 | return ret; |
| 33 | |
| 34 | ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev)); |
| 35 | if (ret) { |
| 36 | dev_err(&pdev->dev, "I/O memory remapping failed\n"); |
| 37 | return ret; |
| 38 | } |
| 39 | |
| 40 | pci_set_master(pdev); |
| 41 | pci_try_set_mwi(pdev); |
| 42 | |
| 43 | ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 44 | if (ret) |
| 45 | return ret; |
| 46 | |
| 47 | ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); |
| 48 | if (ret) |
| 49 | return ret; |
| 50 | |
| 51 | chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL); |
| 52 | if (!chip) |
| 53 | return -ENOMEM; |
| 54 | |
| 55 | chip->dev = &pdev->dev; |
| 56 | chip->regs = pcim_iomap_table(pdev)[0]; |
| 57 | chip->irq = pdev->irq; |
| 58 | |
| 59 | ret = dw_dma_probe(chip, pdata); |
| 60 | if (ret) |
| 61 | return ret; |
| 62 | |
| 63 | pci_set_drvdata(pdev, chip); |
| 64 | |
| 65 | return 0; |
| 66 | } |
| 67 | |
| 68 | static void dw_pci_remove(struct pci_dev *pdev) |
| 69 | { |
| 70 | struct dw_dma_chip *chip = pci_get_drvdata(pdev); |
| 71 | int ret; |
| 72 | |
| 73 | ret = dw_dma_remove(chip); |
| 74 | if (ret) |
| 75 | dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret); |
| 76 | } |
| 77 | |
| 78 | static DEFINE_PCI_DEVICE_TABLE(dw_pci_id_table) = { |
| 79 | /* Medfield */ |
| 80 | { PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_pci_pdata }, |
| 81 | { PCI_VDEVICE(INTEL, 0x0830), (kernel_ulong_t)&dw_pci_pdata }, |
| 82 | |
| 83 | /* BayTrail */ |
| 84 | { PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_pci_pdata }, |
| 85 | { PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_pci_pdata }, |
| 86 | { } |
| 87 | }; |
| 88 | MODULE_DEVICE_TABLE(pci, dw_pci_id_table); |
| 89 | |
| 90 | static struct pci_driver dw_pci_driver = { |
| 91 | .name = "dw_dmac_pci", |
| 92 | .id_table = dw_pci_id_table, |
| 93 | .probe = dw_pci_probe, |
| 94 | .remove = dw_pci_remove, |
| 95 | }; |
| 96 | |
| 97 | module_pci_driver(dw_pci_driver); |
| 98 | |
| 99 | MODULE_LICENSE("GPL v2"); |
| 100 | MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver"); |
| 101 | MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>"); |