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 };
28
brcmnand_soc_data_bus_prepare(struct brcmnand_soc * soc)29 static inline void brcmnand_soc_data_bus_prepare(struct brcmnand_soc *soc)
30 {
31 if (soc && soc->prepare_data_bus)
32 soc->prepare_data_bus(soc, true);
33 }
34
brcmnand_soc_data_bus_unprepare(struct brcmnand_soc * soc)35 static inline void brcmnand_soc_data_bus_unprepare(struct brcmnand_soc *soc)
36 {
37 if (soc && soc->prepare_data_bus)
38 soc->prepare_data_bus(soc, false);
39 }
40
brcmnand_readl(void __iomem * addr)41 static inline u32 brcmnand_readl(void __iomem *addr)
42 {
43 /*
44 * MIPS endianness is configured by boot strap, which also reverses all
45 * bus endianness (i.e., big-endian CPU + big endian bus ==> native
46 * endian I/O).
47 *
48 * Other architectures (e.g., ARM) either do not support big endian, or
49 * else leave I/O in little endian mode.
50 */
51 if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
52 return __raw_readl(addr);
53 else
54 return readl_relaxed(addr);
55 }
56
brcmnand_writel(u32 val,void __iomem * addr)57 static inline void brcmnand_writel(u32 val, void __iomem *addr)
58 {
59 /* See brcmnand_readl() comments */
60 if (IS_ENABLED(CONFIG_MIPS) && IS_ENABLED(CONFIG_CPU_BIG_ENDIAN))
61 __raw_writel(val, addr);
62 else
63 writel_relaxed(val, addr);
64 }
65
66 int brcmnand_probe(struct platform_device *pdev, struct brcmnand_soc *soc);
67 int brcmnand_remove(struct platform_device *pdev);
68
69 extern const struct dev_pm_ops brcmnand_pm_ops;
70
71 #endif /* __BRCMNAND_H__ */
72