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 | |
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, mask: 1 << 0, name: 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(dev: pdev); |
33 | pci_try_set_mwi(dev: pdev); |
34 | |
35 | ret = dma_set_mask_and_coherent(dev: &pdev->dev, DMA_BIT_MASK(32)); |
36 | if (ret) |
37 | return ret; |
38 | |
39 | data = devm_kmemdup(dev: &pdev->dev, src: drv_data, len: sizeof(*drv_data), GFP_KERNEL); |
40 | if (!data) |
41 | return -ENOMEM; |
42 | |
43 | chip = devm_kzalloc(dev: &pdev->dev, size: 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(dw: chip->dw); |
60 | |
61 | pci_set_drvdata(pdev, data); |
62 | |
63 | return 0; |
64 | } |
65 | |
66 | static 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(dw: 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 | |
81 | static 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 | |
89 | static 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 | |
99 | static 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 | |
103 | static 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 | }; |
131 | MODULE_DEVICE_TABLE(pci, dw_pci_id_table); |
132 | |
133 | static 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 | |
143 | module_pci_driver(dw_pci_driver); |
144 | |
145 | MODULE_LICENSE("GPL v2" ); |
146 | MODULE_DESCRIPTION("Synopsys DesignWare DMA Controller PCI driver" ); |
147 | MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>" ); |
148 | |