xref: /kernel/linux/linux-5.10/drivers/dma/dw/pci.c (revision 8c2ecf20) 
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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
36	if (ret)
37		return ret;
38
39	ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
40	if (ret)
41		return ret;
42
43	data = devm_kmemdup(&pdev->dev, drv_data, sizeof(*drv_data), GFP_KERNEL);
44	if (!data)
45		return -ENOMEM;
46
47	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
48	if (!chip)
49		return -ENOMEM;
50
51	chip->dev = &pdev->dev;
52	chip->id = pdev->devfn;
53	chip->regs = pcim_iomap_table(pdev)[0];
54	chip->irq = pdev->irq;
55	chip->pdata = data->pdata;
56
57	data->chip = chip;
58
59	ret = data->probe(chip);
60	if (ret)
61		return ret;
62
63	dw_dma_acpi_controller_register(chip->dw);
64
65	pci_set_drvdata(pdev, data);
66
67	return 0;
68}
69
70static void dw_pci_remove(struct pci_dev *pdev)
71{
72	struct dw_dma_chip_pdata *data = pci_get_drvdata(pdev);
73	struct dw_dma_chip *chip = data->chip;
74	int ret;
75
76	dw_dma_acpi_controller_free(chip->dw);
77
78	ret = data->remove(chip);
79	if (ret)
80		dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
81}
82
83#ifdef CONFIG_PM_SLEEP
84
85static int dw_pci_suspend_late(struct device *dev)
86{
87	struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
88	struct dw_dma_chip *chip = data->chip;
89
90	return do_dw_dma_disable(chip);
91};
92
93static int dw_pci_resume_early(struct device *dev)
94{
95	struct dw_dma_chip_pdata *data = dev_get_drvdata(dev);
96	struct dw_dma_chip *chip = data->chip;
97
98	return do_dw_dma_enable(chip);
99};
100
101#endif /* CONFIG_PM_SLEEP */
102
103static const struct dev_pm_ops dw_pci_dev_pm_ops = {
104	SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
105};
106
107static const struct pci_device_id dw_pci_id_table[] = {
108	/* Medfield (GPDMA) */
109	{ PCI_VDEVICE(INTEL, 0x0827), (kernel_ulong_t)&dw_dma_chip_pdata },
110
111	/* BayTrail */
112	{ PCI_VDEVICE(INTEL, 0x0f06), (kernel_ulong_t)&dw_dma_chip_pdata },
113	{ PCI_VDEVICE(INTEL, 0x0f40), (kernel_ulong_t)&dw_dma_chip_pdata },
114
115	/* Merrifield */
116	{ PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&idma32_chip_pdata },
117
118	/* Braswell */
119	{ PCI_VDEVICE(INTEL, 0x2286), (kernel_ulong_t)&dw_dma_chip_pdata },
120	{ PCI_VDEVICE(INTEL, 0x22c0), (kernel_ulong_t)&dw_dma_chip_pdata },
121
122	/* Elkhart Lake iDMA 32-bit (PSE DMA) */
123	{ PCI_VDEVICE(INTEL, 0x4bb4), (kernel_ulong_t)&idma32_chip_pdata },
124	{ PCI_VDEVICE(INTEL, 0x4bb5), (kernel_ulong_t)&idma32_chip_pdata },
125	{ PCI_VDEVICE(INTEL, 0x4bb6), (kernel_ulong_t)&idma32_chip_pdata },
126
127	/* Haswell */
128	{ PCI_VDEVICE(INTEL, 0x9c60), (kernel_ulong_t)&dw_dma_chip_pdata },
129
130	/* Broadwell */
131	{ PCI_VDEVICE(INTEL, 0x9ce0), (kernel_ulong_t)&dw_dma_chip_pdata },
132
133	{ }
134};
135MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
136
137static struct pci_driver dw_pci_driver = {
138	.name		= "dw_dmac_pci",
139	.id_table	= dw_pci_id_table,
140	.probe		= dw_pci_probe,
141	.remove		= dw_pci_remove,
142	.driver	= {
143		.pm	= &dw_pci_dev_pm_ops,
144	},
145};
146
147module_pci_driver(dw_pci_driver);
148
149MODULE_LICENSE("GPL v2");
150MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
151MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
152