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 mrfld_pdata = {
19 .nr_channels = 8,
20 .is_private = true,
21 .is_memcpy = true,
22 .is_idma32 = true,
23 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
24 .chan_priority = CHAN_PRIORITY_ASCENDING,
25 .block_size = 131071,
26 .nr_masters = 1,
27 .data_width = {4},
28 };
29
dw_pci_probe(struct pci_dev * pdev,const struct pci_device_id * pid)30 static int dw_pci_probe(struct pci_dev *pdev, const struct pci_device_id *pid)
31 {
32 const struct dw_dma_platform_data *pdata = (void *)pid->driver_data;
33 struct dw_dma_chip *chip;
34 int ret;
35
36 ret = pcim_enable_device(pdev);
37 if (ret)
38 return ret;
39
40 ret = pcim_iomap_regions(pdev, 1 << 0, pci_name(pdev));
41 if (ret) {
42 dev_err(&pdev->dev, "I/O memory remapping failed\n");
43 return ret;
44 }
45
46 pci_set_master(pdev);
47 pci_try_set_mwi(pdev);
48
49 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
50 if (ret)
51 return ret;
52
53 ret = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
54 if (ret)
55 return ret;
56
57 chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
58 if (!chip)
59 return -ENOMEM;
60
61 chip->dev = &pdev->dev;
62 chip->id = pdev->devfn;
63 chip->regs = pcim_iomap_table(pdev)[0];
64 chip->irq = pdev->irq;
65 chip->pdata = pdata;
66
67 ret = dw_dma_probe(chip);
68 if (ret)
69 return ret;
70
71 pci_set_drvdata(pdev, chip);
72
73 return 0;
74 }
75
dw_pci_remove(struct pci_dev * pdev)76 static void dw_pci_remove(struct pci_dev *pdev)
77 {
78 struct dw_dma_chip *chip = pci_get_drvdata(pdev);
79 int ret;
80
81 ret = dw_dma_remove(chip);
82 if (ret)
83 dev_warn(&pdev->dev, "can't remove device properly: %d\n", ret);
84 }
85
86 #ifdef CONFIG_PM_SLEEP
87
dw_pci_suspend_late(struct device * dev)88 static int dw_pci_suspend_late(struct device *dev)
89 {
90 struct pci_dev *pci = to_pci_dev(dev);
91 struct dw_dma_chip *chip = pci_get_drvdata(pci);
92
93 return dw_dma_disable(chip);
94 };
95
dw_pci_resume_early(struct device * dev)96 static int dw_pci_resume_early(struct device *dev)
97 {
98 struct pci_dev *pci = to_pci_dev(dev);
99 struct dw_dma_chip *chip = pci_get_drvdata(pci);
100
101 return dw_dma_enable(chip);
102 };
103
104 #endif /* CONFIG_PM_SLEEP */
105
106 static const struct dev_pm_ops dw_pci_dev_pm_ops = {
107 SET_LATE_SYSTEM_SLEEP_PM_OPS(dw_pci_suspend_late, dw_pci_resume_early)
108 };
109
110 static const struct pci_device_id dw_pci_id_table[] = {
111 /* Medfield (GPDMA) */
112 { PCI_VDEVICE(INTEL, 0x0827) },
113
114 /* BayTrail */
115 { PCI_VDEVICE(INTEL, 0x0f06) },
116 { PCI_VDEVICE(INTEL, 0x0f40) },
117
118 /* Merrifield iDMA 32-bit (GPDMA) */
119 { PCI_VDEVICE(INTEL, 0x11a2), (kernel_ulong_t)&mrfld_pdata },
120
121 /* Braswell */
122 { PCI_VDEVICE(INTEL, 0x2286) },
123 { PCI_VDEVICE(INTEL, 0x22c0) },
124
125 /* Haswell */
126 { PCI_VDEVICE(INTEL, 0x9c60) },
127
128 /* Broadwell */
129 { PCI_VDEVICE(INTEL, 0x9ce0) },
130
131 { }
132 };
133 MODULE_DEVICE_TABLE(pci, dw_pci_id_table);
134
135 static struct pci_driver dw_pci_driver = {
136 .name = "dw_dmac_pci",
137 .id_table = dw_pci_id_table,
138 .probe = dw_pci_probe,
139 .remove = dw_pci_remove,
140 .driver = {
141 .pm = &dw_pci_dev_pm_ops,
142 },
143 };
144
145 module_pci_driver(dw_pci_driver);
146
147 MODULE_LICENSE("GPL v2");
148 MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver");
149 MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
150
