1 /*
2  * Copyright © 2015 Broadcom Corporation
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  */
13 
14 #ifndef __BRCMNAND_H__
15 #define __BRCMNAND_H__
16 
17 #include <linux/types.h>
18 #include <linux/io.h>
19 
20 struct platform_device;
21 struct dev_pm_ops;
22 
23 struct brcmnand_soc {
24 	bool (*ctlrdy_ack)(struct brcmnand_soc *soc);
25 	void (*ctlrdy_set_enabled)(struct brcmnand_soc *soc, bool en);
26 	void (*prepare_data_bus)(struct brcmnand_soc *soc, bool prepare,
27 				 bool is_param);
28 };
29 
30 static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc,
31 						 bool is_param)
32 {
33 	if (soc && soc->prepare_data_bus)
34 		soc->prepare_data_bus(soc, true, is_param);
35 }
36 
37 static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc,
38 						   bool is_param)
39 {
40 	if (soc && soc->prepare_data_bus)
41 		soc->prepare_data_bus(soc, false, is_param);
42 }
43 
44 static inline u32 brcmnand_readl(void __iomem *addr)
45 {
46 	/*
47 	 * MIPS endianness is configured by boot strap, which also reverses all
48 	 * bus endianness (i.e., big-endian CPU + big endian bus ==> native
49 	 * endian I/O).
50 	 *
51 	 * Other architectures (e.g., ARM) either do not support big endian, or
52 	 * else leave I/O in little endian mode.
53 	 */
54 	if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
55 		return __raw_readl(addr);
56 	else
57 		return readl_relaxed(addr);
58 }
59 
60 static inline void brcmnand_writel(u32 val, void __iomem *addr)
61 {
62 	/* See brcmnand_readl() comments */
63 	if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
64 		__raw_writel(val, addr);
65 	else
66 		writel_relaxed(val, addr);
67 }
68 
69 int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc);
70 int brcmnand_remove(struct platform_device *pdev);
71 
72 extern const struct dev_pm_ops brcmnand_pm_ops;
73 
74 #endif /* __BRCMNAND_H__ */
75