projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 2b49e0c5 AS |
1 | /* |
| 2 | * Driver for the High Speed UART DMA | |
| 3 | * | |
| 4 | * Copyright (C) 2015 Intel Corporation | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifndef _DMA_HSU_H | |
| 12 | #define _DMA_HSU_H | |
| 13 | ||
| 14 | #include <linux/device.h> | |
| 15 | #include <linux/interrupt.h> | |
| 16 | ||
| 17 | #include <linux/platform_data/dma-hsu.h> | |
| 18 | ||
| 19 | struct hsu_dma; | |
| 20 | ||
| 21 | /** | |
| 22 | * struct hsu_dma_chip - representation of HSU DMA hardware | |
| 23 | * @dev: struct device of the DMA controller | |
| 24 | * @irq: irq line | |
| 25 | * @regs: memory mapped I/O space | |
| 26 | * @length: I/O space length | |
| 27 | * @offset: offset of the I/O space where registers are located | |
| 28 | * @hsu: struct hsu_dma that is filed by ->probe() | |
| 29 | * @pdata: platform data for the DMA controller if provided | |
| 30 | */ | |
| 31 | struct hsu_dma_chip { | |
| 32 | struct device *dev; | |
| 33 | int irq; | |
| 34 | void __iomem *regs; | |
| 35 | unsigned int length; | |
| 36 | unsigned int offset; | |
| 37 | struct hsu_dma *hsu; | |
| 2b49e0c5 AS |
38 | }; |
| 39 | ||
| 47f82f1a | 40 | #if IS_ENABLED(CONFIG_HSU_DMA) |
| 2b49e0c5 | 41 | /* Export to the internal users */ |
| c6f82787 CKT |
42 | int hsu_dma_get_status(struct hsu_dma_chip *chip, unsigned short nr, |
| 43 | u32 *status); | |
| d2f5a731 | 44 | int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, u32 status); |
| 2b49e0c5 AS |
45 | |
| 46 | /* Export to the platform drivers */ | |
| 47 | int hsu_dma_probe(struct hsu_dma_chip *chip); | |
| 48 | int hsu_dma_remove(struct hsu_dma_chip *chip); | |
| 47f82f1a | 49 | #else |
| c6f82787 CKT |
50 | static inline int hsu_dma_get_status(struct hsu_dma_chip *chip, |
| 51 | unsigned short nr, u32 *status) | |
| 52 | { | |
| 53 | return 0; | |
| 54 | } | |
| d2f5a731 AS |
55 | static inline int hsu_dma_do_irq(struct hsu_dma_chip *chip, unsigned short nr, |
| 56 | u32 status) | |
| 47f82f1a | 57 | { |
| d2f5a731 | 58 | return 0; |
| 47f82f1a HK |
59 | } |
| 60 | static inline int hsu_dma_probe(struct hsu_dma_chip *chip) { return -ENODEV; } | |
| 61 | static inline int hsu_dma_remove(struct hsu_dma_chip *chip) { return 0; } | |
| 62 | #endif /* CONFIG_HSU_DMA */ | |
| 2b49e0c5 AS |
63 | |
| 64 | #endif /* _DMA_HSU_H */ |