projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 |