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sunxi: Move await_completion dram helper to dram.h
[u-boot] / arch / arm / include / asm / arch-sunxi / dram.h
1 /*
2  * (C) Copyright 2007-2012
3  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
4  * Berg Xing <bergxing@allwinnertech.com>
5  * Tom Cubie <tangliang@allwinnertech.com>
6  *
7  * Sunxi platform dram register definition.
8  *
9  * SPDX-License-Identifier:     GPL-2.0+
10  */
11
12 #ifndef _SUNXI_DRAM_H
13 #define _SUNXI_DRAM_H
14
15 #include <asm/io.h>
16 #include <linux/types.h>
17
18 /* dram regs definition */
19 #if defined(CONFIG_MACH_SUN6I)
20 #include <asm/arch/dram_sun6i.h>
21 #else
22 #include <asm/arch/dram_sun4i.h>
23 #endif
24
25 unsigned long sunxi_dram_init(void);
26
27 /*
28  * Wait up to 1s for value to be set in given part of reg.
29  */
30 static inline void mctl_await_completion(u32 *reg, u32 mask, u32 val)
31 {
32         unsigned long tmo = timer_get_us() + 1000000;
33
34         while ((readl(reg) & mask) != val) {
35                 if (timer_get_us() > tmo)
36                         panic("Timeout initialising DRAM\n");
37         }
38 }
39
40 #endif /* _SUNXI_DRAM_H */