1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Driver for the Synopsys DesignWare DMA Controller
4 *
5 * Copyright (C) 2013 Intel Corporation
6 */
7
8 #ifndef _DMA_DW_INTERNAL_H
9 #define _DMA_DW_INTERNAL_H
10
11 #include <linux/dma/dw.h>
12
13 #include "regs.h"
14
15 int do_dma_probe(struct dw_dma_chip *chip);
16 int do_dma_remove(struct dw_dma_chip *chip);
17
18 void do_dw_dma_on(struct dw_dma *dw);
19 void do_dw_dma_off(struct dw_dma *dw);
20
21 int do_dw_dma_disable(struct dw_dma_chip *chip);
22 int do_dw_dma_enable(struct dw_dma_chip *chip);
23
24 extern bool dw_dma_filter(struct dma_chan *chan, void *param);
25
26 #ifdef CONFIG_ACPI
27 void dw_dma_acpi_controller_register(struct dw_dma *dw);
28 void dw_dma_acpi_controller_free(struct dw_dma *dw);
29 #else /* !CONFIG_ACPI */
dw_dma_acpi_controller_register(struct dw_dma * dw)30 static inline void dw_dma_acpi_controller_register(struct dw_dma *dw) {}
dw_dma_acpi_controller_free(struct dw_dma * dw)31 static inline void dw_dma_acpi_controller_free(struct dw_dma *dw) {}
32 #endif /* !CONFIG_ACPI */
33
34 struct platform_device;
35
36 #ifdef CONFIG_OF
37 struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev);
38 void dw_dma_of_controller_register(struct dw_dma *dw);
39 void dw_dma_of_controller_free(struct dw_dma *dw);
40 #else
dw_dma_parse_dt(struct platform_device * pdev)41 static inline struct dw_dma_platform_data *dw_dma_parse_dt(struct platform_device *pdev)
42 {
43 return NULL;
44 }
dw_dma_of_controller_register(struct dw_dma * dw)45 static inline void dw_dma_of_controller_register(struct dw_dma *dw) {}
dw_dma_of_controller_free(struct dw_dma * dw)46 static inline void dw_dma_of_controller_free(struct dw_dma *dw) {}
47 #endif
48
49 struct dw_dma_chip_pdata {
50 const struct dw_dma_platform_data *pdata;
51 int (*probe)(struct dw_dma_chip *chip);
52 int (*remove)(struct dw_dma_chip *chip);
53 struct dw_dma_chip *chip;
54 };
55
56 static __maybe_unused const struct dw_dma_chip_pdata dw_dma_chip_pdata = {
57 .probe = dw_dma_probe,
58 .remove = dw_dma_remove,
59 };
60
61 static const struct dw_dma_platform_data idma32_pdata = {
62 .nr_channels = 8,
63 .chan_allocation_order = CHAN_ALLOCATION_ASCENDING,
64 .chan_priority = CHAN_PRIORITY_ASCENDING,
65 .block_size = 131071,
66 .nr_masters = 1,
67 .data_width = {4},
68 .multi_block = {1, 1, 1, 1, 1, 1, 1, 1},
69 };
70
71 static __maybe_unused const struct dw_dma_chip_pdata idma32_chip_pdata = {
72 .pdata = &idma32_pdata,
73 .probe = idma32_dma_probe,
74 .remove = idma32_dma_remove,
75 };
76
77 #endif /* _DMA_DW_INTERNAL_H */
78