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
dw_pci_probe(struct pci_dev * pdev,const struct pci_device_id * pid)15 static 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
dw_pci_remove(struct pci_dev * pdev)70 static 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
dw_pci_suspend_late(struct device * dev)85 static 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
dw_pci_resume_early(struct device * dev)93 static 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
103 static 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
107 static 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 };
135 MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
136
137 static 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
147 module_pci_driver(dw_pci_driver);
148
149 MODULE_LICENSE("GPL v2");
150 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
151 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
152