1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * Copyright (C) 2006 Lennert Buytenhek <buytenh@wantstofly.org>
4 */
5
6 #include <asm/mach-types.h>
7
8 static inline unsigned int __raw_readl(unsigned int ptr)
9 {
10 return *((volatile unsigned int *)ptr);
11 }
12
13 static inline void __raw_writeb(unsigned char value, unsigned int ptr)
14 {
15 *((volatile unsigned char *)ptr) = value;
16 }
17
18 static inline void __raw_writel(unsigned int value, unsigned int ptr)
19 {
20 *((volatile unsigned int *)ptr) = value;
21 }
22
23 /*
24 * Some bootloaders don't turn off DMA from the ethernet MAC before
25 * jumping to linux, which means that we might end up with bits of RX
26 * status and packet data scribbled over the uncompressed kernel image.
27 * Work around this by resetting the ethernet MAC before we uncompress.
28 */
29 #define PHYS_ETH_SELF_CTL 0x80010020
30 #define ETH_SELF_CTL_RESET 0x00000001
31
32 static inline void ep93xx_ethernet_reset(void)
33 {
34 unsigned int v;
35
36 /* Reset the ethernet MAC. */
37 v = __raw_readl(PHYS_ETH_SELF_CTL);
38 __raw_writel(v | ETH_SELF_CTL_RESET, PHYS_ETH_SELF_CTL);
39
40 /* Wait for reset to finish. */
41 while (__raw_readl(PHYS_ETH_SELF_CTL) & ETH_SELF_CTL_RESET)
42 ;
43 }
44
45 #define TS72XX_WDT_CONTROL_PHYS_BASE 0x23800000
46 #define TS72XX_WDT_FEED_PHYS_BASE 0x23c00000
47 #define TS72XX_WDT_FEED_VAL 0x05
48
49 static inline void __maybe_unused ts72xx_watchdog_disable(void)
50 {
51 __raw_writeb(TS72XX_WDT_FEED_VAL, TS72XX_WDT_FEED_PHYS_BASE);
52 __raw_writeb(0, TS72XX_WDT_CONTROL_PHYS_BASE);
53 }
54
55 static inline void ep93xx_decomp_setup(void)
56 {
57 if (machine_is_ts72xx())
58 ts72xx_watchdog_disable();
59
60 if (machine_is_edb9301() ||
61 machine_is_edb9302() ||
62 machine_is_edb9302a() ||
63 machine_is_edb9302a() ||
64 machine_is_edb9307() ||
65 machine_is_edb9307a() ||
66 machine_is_edb9307a() ||
67 machine_is_edb9312() ||
68 machine_is_edb9315() ||
69 machine_is_edb9315a() ||
70 machine_is_edb9315a() ||
71 machine_is_ts72xx() ||
72 machine_is_bk3() ||
73 machine_is_vision_ep9307())
74 ep93xx_ethernet_reset();
75 }
76
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