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8ac49e04 | 1 | /* |
a21ea269 | 2 | * Copyright (C) 2012-2014 Broadcom Corporation |
8ac49e04 CD |
3 | * |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public License as | |
6 | * published by the Free Software Foundation version 2. | |
7 | * | |
8 | * This program is distributed "as is" WITHOUT ANY WARRANTY of any | |
9 | * kind, whether express or implied; without even the implied warranty | |
10 | * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | */ | |
13 | ||
8011657b | 14 | #include <linux/clocksource.h> |
389df036 | 15 | #include <linux/of_address.h> |
8ac49e04 CD |
16 | |
17 | #include <asm/mach/arch.h> | |
8ac49e04 | 18 | |
eeda4cb9 | 19 | #include "kona_l2_cache.h" |
b8eb35fd | 20 | |
a21ea269 MM |
21 | #define SECWDOG_OFFSET 0x00000000 |
22 | #define SECWDOG_RESERVED_MASK 0xe2000000 | |
23 | #define SECWDOG_WD_LOAD_FLAG_MASK 0x10000000 | |
24 | #define SECWDOG_EN_MASK 0x08000000 | |
25 | #define SECWDOG_SRSTEN_MASK 0x04000000 | |
26 | #define SECWDOG_CLKS_SHIFT 20 | |
27 | #define SECWDOG_COUNT_SHIFT 0 | |
28 | ||
29 | static void bcm281xx_restart(enum reboot_mode mode, const char *cmd) | |
257b49e3 | 30 | { |
a21ea269 MM |
31 | uint32_t val; |
32 | void __iomem *base; | |
33 | struct device_node *np_wdog; | |
257b49e3 | 34 | |
a21ea269 MM |
35 | np_wdog = of_find_compatible_node(NULL, NULL, "brcm,kona-wdt"); |
36 | if (!np_wdog) { | |
37 | pr_emerg("Couldn't find brcm,kona-wdt\n"); | |
38 | return; | |
39 | } | |
40 | base = of_iomap(np_wdog, 0); | |
41 | if (!base) { | |
42 | pr_emerg("Couldn't map brcm,kona-wdt\n"); | |
43 | return; | |
257b49e3 | 44 | } |
a21ea269 MM |
45 | |
46 | /* Enable watchdog with short timeout (244us). */ | |
47 | val = readl(base + SECWDOG_OFFSET); | |
48 | val &= SECWDOG_RESERVED_MASK | SECWDOG_WD_LOAD_FLAG_MASK; | |
49 | val |= SECWDOG_EN_MASK | SECWDOG_SRSTEN_MASK | | |
50 | (0x15 << SECWDOG_CLKS_SHIFT) | | |
51 | (0x8 << SECWDOG_COUNT_SHIFT); | |
52 | writel(val, base + SECWDOG_OFFSET); | |
53 | ||
54 | /* Wait for reset */ | |
55 | while (1); | |
257b49e3 MM |
56 | } |
57 | ||
0e8b860a | 58 | static void __init bcm281xx_init(void) |
8ac49e04 | 59 | { |
b8eb35fd | 60 | kona_l2_cache_init(); |
8ac49e04 CD |
61 | } |
62 | ||
9c6423aa AE |
63 | static const char * const bcm281xx_dt_compat[] = { |
64 | "brcm,bcm11351", /* Have to use the first number upstreamed */ | |
65 | NULL, | |
66 | }; | |
8ac49e04 | 67 | |
9c6423aa | 68 | DT_MACHINE_START(BCM281XX_DT, "BCM281xx Broadcom Application Processor") |
0e8b860a | 69 | .init_machine = bcm281xx_init, |
a21ea269 | 70 | .restart = bcm281xx_restart, |
9c6423aa | 71 | .dt_compat = bcm281xx_dt_compat, |
8ac49e04 | 72 | MACHINE_END |