| 1 | /* |
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| 2 | * kempld_wdt.h - Kontron PLD watchdog driver definitions |
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| 3 | * |
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| 4 | * Copyright (c) 2010 Kontron Embedded Modules GmbH |
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| 5 | * Author: Michael Brunner <michael.brunner@kontron.com> |
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| 6 | * |
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| 7 | * This program is free software; you can redistribute it and/or modify |
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| 8 | * it under the terms of the GNU General Public License 2 as published |
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| 9 | * by the Free Software Foundation. |
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| 10 | * |
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| 11 | * This program is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 14 | * GNU General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU General Public License |
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| 17 | * along with this program; see the file COPYING. If not, write to |
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| 18 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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| 19 | */ |
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| 20 | |
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| 21 | #ifndef _KEMPLD_WDT_H_ |
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| 22 | #define _KEMPLD_WDT_H_ |
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| 23 | #include <stdint.h> |
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| 24 | |
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| 25 | #define KEMPLD_IOPORT 0x0a80 |
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| 26 | #define KEMPLD_IODATA (KEMPLD_IOPORT+1) |
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| 27 | |
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| 28 | #define KEMPLD_MUTEX_KEY 0x80 |
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| 29 | |
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| 30 | /* watchdog register definitions */ |
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| 31 | #define KEMPLD_WDT_KICK 0x16 |
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| 32 | #define KEMPLD_WDT_REV 0x16 |
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| 33 | #define KEMPLD_WDT_REV_GET(x) (x & 0xf) |
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| 34 | #define KEMPLD_WDT_CFG 0x17 |
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| 35 | #define KEMPLD_WDT_CFG_STAGE_TIMEOUT_OCCURED(x) (1<<x) |
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| 36 | #define KEMPLD_WDT_CFG_ENABLE_LOCK 0x8 |
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| 37 | #define KEMPLD_WDT_CFG_ENABLE 0x10 |
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| 38 | #define KEMPLD_WDT_CFG_AUTO_RELOAD 0x40 |
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| 39 | #define KEMPLD_WDT_CFG_GLOBAL_LOCK 0x80 |
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| 40 | #define KEMPLD_WDT_STAGE_CFG(x) (0x18+x) |
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| 41 | #define KEMPLD_WDT_STAGE_CFG_ACTION_MASK 0x7 |
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| 42 | #define KEMPLD_WDT_STAGE_CFG_GET_ACTION(x) (x & 0x7) |
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| 43 | #define KEMPLD_WDT_STAGE_CFG_ASSERT 0x8 |
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| 44 | #define KEMPLD_WDT_STAGE_CFG_PRESCALER_MASK 0x30 |
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| 45 | #define KEMPLD_WDT_STAGE_CFG_GET_PRESCALER(x) ((x & 0x30)>>4) |
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| 46 | #define KEMPLD_WDT_STAGE_CFG_SET_PRESCALER(x) ((x & 0x30)<<4) |
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| 47 | #define KEMPLD_WDT_STAGE_TIMEOUT(x) (0x1b+x*4) |
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| 48 | #define KEMPLD_WDT_MAX_STAGES 3 |
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| 49 | |
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| 50 | #define KEMPLD_WDT_ACTION_NONE 0x0 |
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| 51 | #define KEMPLD_WDT_ACTION_RESET 0x1 |
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| 52 | #define KEMPLD_WDT_ACTION_NMI 0x2 |
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| 53 | #define KEMPLD_WDT_ACTION_SMI 0x3 |
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| 54 | #define KEMPLD_WDT_ACTION_SCI 0x4 |
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| 55 | #define KEMPLD_WDT_ACTION_DELAY 0x5 |
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| 56 | |
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| 57 | #define KEMPLD_WDT_PRESCALER_21BIT 0x0 |
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| 58 | #define KEMPLD_WDT_PRESCALER_17BIT 0x1 |
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| 59 | #define KEMPLD_WDT_PRESCALER_12BIT 0x2 |
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| 60 | |
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| 61 | const int kempld_prescaler_bits[] = { 21, 17, 12 }; |
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| 62 | |
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| 63 | struct kempld_watchdog_stage { |
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| 64 | int num; |
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| 65 | uint32_t timeout_mask; |
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| 66 | }; |
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| 67 | |
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| 68 | /** |
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| 69 | * struct kempld_device_data - Internal representation of the PLD device |
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| 70 | * @io_base: Pointer to the IO memory |
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| 71 | * @io_index: Pointer to the IO index register |
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| 72 | * @io_data: Pointer to the IO data register |
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| 73 | * @pld_clock: PLD clock frequency |
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| 74 | * @lock: PLD spin-lock |
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| 75 | * @lock_flags: PLD spin-lock flags |
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| 76 | * @have_mutex: Bool value that indicates if mutex is aquired |
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| 77 | * @last_index: Last written index value |
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| 78 | * @rscr: Kernel resource structure |
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| 79 | * @dev: Pointer to kernel device structure |
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| 80 | * @info: KEMPLD info structure |
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| 81 | */ |
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| 82 | struct kempld_device_data { |
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| 83 | uint16_t io_base; |
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| 84 | uint16_t io_index; |
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| 85 | uint16_t io_data; |
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| 86 | uint32_t pld_clock; |
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| 87 | /* spinlock_t lock; |
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| 88 | unsigned long lock_flags; */ |
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| 89 | int have_mutex; |
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| 90 | uint8_t last_index; |
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| 91 | /* struct resource rscr; |
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| 92 | struct device *dev; |
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| 93 | struct kempld_info info;*/ |
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| 94 | }; |
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| 95 | |
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| 96 | struct watchdog_info { |
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| 97 | uint32_t options; /* Options the card/driver supports */ |
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| 98 | uint32_t firmware_version; /* Firmware version of the card */ |
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| 99 | uint8_t identity[32]; /* Identity of the board */ |
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| 100 | }; |
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| 101 | |
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| 102 | struct kempld_watchdog_data { |
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| 103 | unsigned int revision; |
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| 104 | int timeout; |
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| 105 | int pretimeout; |
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| 106 | unsigned long is_open; |
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| 107 | unsigned long expect_close; |
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| 108 | int stages; |
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| 109 | struct kempld_watchdog_stage *timeout_stage; |
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| 110 | struct kempld_watchdog_stage *pretimeout_stage; |
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| 111 | struct kempld_device_data *pld; |
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| 112 | struct kempld_watchdog_stage *stage[KEMPLD_WDT_MAX_STAGES]; |
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| 113 | struct watchdog_info ident; |
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| 114 | }; |
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| 115 | |
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| 116 | #endif /* _KEMPLD_WDT_H_ */ |
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| 117 | #define KEMPLD_PRESCALER(x) (0xffffffff>>(32-kempld_prescaler_bits[x])) |
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