1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * TXx9 SoC DMA Controller
4 */
5
6 #ifndef __ASM_TXX9_DMAC_H
7 #define __ASM_TXX9_DMAC_H
8
9 #include <linux/dmaengine.h>
10
11 #define TXX9_DMA_MAX_NR_CHANNELS 4
12
13 /**
14 * struct txx9dmac_platform_data - Controller configuration parameters
15 * @memcpy_chan: Channel used for DMA_MEMCPY
16 * @have_64bit_regs: DMAC have 64 bit registers
17 */
18 struct txx9dmac_platform_data {
19 int memcpy_chan;
20 bool have_64bit_regs;
21 };
22
23 /**
24 * struct txx9dmac_chan_platform_data - Channel configuration parameters
25 * @dmac_dev: A platform device for DMAC
26 */
27 struct txx9dmac_chan_platform_data {
28 struct platform_device *dmac_dev;
29 };
30
31 /**
32 * struct txx9dmac_slave - Controller-specific information about a slave
33 * @tx_reg: physical address of data register used for
34 * memory-to-peripheral transfers
35 * @rx_reg: physical address of data register used for
36 * peripheral-to-memory transfers
37 * @reg_width: peripheral register width
38 */
39 struct txx9dmac_slave {
40 u64 tx_reg;
41 u64 rx_reg;
42 unsigned int reg_width;
43 };
44
45 void txx9_dmac_init(int id, unsigned long baseaddr, int irq,
46 const struct txx9dmac_platform_data *pdata);
47
48 #endif /* __ASM_TXX9_DMAC_H */