1// SPDX-License-Identifier: GPL-2.0
2/*
3 * PCI driver for the Synopsys DesignWare DMA Controller
4 *
5 * Copyright (C) 2013 Intel Corporation
6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
7 */
8
9#include <linux/module.h>
10#include <linux/pci.h>
11#include <linux/device.h>
12
13#include "internal.h"
14
15static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
16{
17	const struct dw_dma_chip_pdata *drv_data = (void *)pid->driver_data;
18	struct dw_dma_chip_pdata *data;
19	struct dw_dma_chip *chip;
20	int ret;
21
22	ret = pcim_enable_device(pdev);
23	if (ret)
24		return ret;
25
26	ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
27	if (ret) {
28		dev_err(&pdev->dev, "I/O memory remapping failed\n");
29		return ret;
30	}
31
32	pci_set_master(pdev);
33	pci_try_set_mwi(pdev);
34
35	ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
36	if (ret)
37		return ret;
38
39	data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);
40	if (!data)
41		return -ENOMEM;
42
43	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
44	if (!chip)
45		return -ENOMEM;
46
47	chip->dev = &pdev->dev;
48	chip->id = pdev->devfn;
49	chip->regs = pcim_iomap_table(pdev)[0];
50	chip->irq = pdev->irq;
51	chip->pdata = data->pdata;
52
53	data->chip = chip;
54
55	ret = data->probe(chip);
56	if (ret)
57		return ret;
58
59	dw_dma_acpi_controller_register(chip->dw);
60
61	pci_set_drvdata(pdev, data);
62
63	return 0;
64}
65
66static void dw_pci_remove(struct pci_dev *pdev)
67{
68	struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev);
69	struct dw_dma_chip *chip = data->chip;
70	int ret;
71
72	dw_dma_acpi_controller_free(chip->dw);
73
74	ret = data->remove(chip);
75	if (ret)
76		dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
77}
78
79#ifdef CONFIG_PM_SLEEP
80
81static int dw_pci_suspend_late(struct device *dev)
82{
83	struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
84	struct dw_dma_chip *chip = data->chip;
85
86	return do_dw_dma_disable(chip);
87};
88
89static int dw_pci_resume_early(struct device *dev)
90{
91	struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
92	struct dw_dma_chip *chip = data->chip;
93
94	return do_dw_dma_enable(chip);
95};
96
97#endif /* CONFIG_PM_SLEEP */
98
99static const struct dev_pm_ops dw_pci_dev_pm_ops = {
100	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
101};
102
103static const struct pci_device_id dw_pci_id_table[] = {
104	/* Medfield (GPDMA) */
105	{ PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata },
106
107	/* BayTrail */
108	{ PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata },
109	{ PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata },
110
111	/* Merrifield */
112	{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata },
113
114	/* Braswell */
115	{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata },
116	{ PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata },
117
118	/* Elkhart Lake iDMA 32-bit (PSE DMA) */
119	{ PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&xbar_chip_pdata },
120	{ PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&xbar_chip_pdata },
121	{ PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&xbar_chip_pdata },
122
123	/* Haswell */
124	{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata },
125
126	/* Broadwell */
127	{ PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata },
128
129	{ }
130};
131MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
132
133static struct pci_driver dw_pci_driver = {
134	.name		= "dw_dmac_pci",
135	.id_table	= dw_pci_id_table,
136	.probe		= dw_pci_probe,
137	.remove		= dw_pci_remove,
138	.driver	= {
139		.pm	= &dw_pci_dev_pm_ops,
140	},
141};
142
143module_pci_driver(dw_pci_driver);
144
145MODULE_LICENSE("GPL v2");
146MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
147MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
148