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 
__raw_readl(unsigned int ptr)8 static inline unsigned int __raw_readl(unsigned int ptr)
9 {
10 	return *((volatile unsigned int *)ptr);
11 }
12 
__raw_writeb(unsigned char value,unsigned int ptr)13 static inline void __raw_writeb(unsigned char value, unsigned int ptr)
14 {
15 	*((volatile unsigned char *)ptr) = value;
16 }
17 
__raw_writel(unsigned int value,unsigned int ptr)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 
ep93xx_ethernet_reset(void)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 
ts72xx_watchdog_disable(void)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 
ep93xx_decomp_setup(void)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