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
 8static inline unsigned int __raw_readl(unsigned int ptr)
 9{
10	return *((volatile unsigned int *)ptr);
11}
12
13static inline void __raw_writeb(unsigned char value, unsigned int ptr)
14{
15	*((volatile unsigned char *)ptr) = value;
16}
17
18static 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
32static 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
49static 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
55static 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}