| 1 | /* Blackfin General Purpose Timers (GPtimer) model |
| 2 | |
| 3 | Copyright (C) 2010-2013 Free Software Foundation, Inc. |
| 4 | Contributed by Analog Devices, Inc. |
| 5 | |
| 6 | This file is part of simulators. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | |
| 23 | #include "sim-main.h" |
| 24 | #include "devices.h" |
| 25 | #include "dv-bfin_gptimer.h" |
| 26 | |
| 27 | /* XXX: This is merely a stub. */ |
| 28 | |
| 29 | struct bfin_gptimer |
| 30 | { |
| 31 | /* This top portion matches common dv_bfin struct. */ |
| 32 | bu32 base; |
| 33 | struct hw *dma_master; |
| 34 | bool acked; |
| 35 | |
| 36 | struct hw_event *handler; |
| 37 | char saved_byte; |
| 38 | int saved_count; |
| 39 | |
| 40 | /* Order after here is important -- matches hardware MMR layout. */ |
| 41 | bu16 BFIN_MMR_16(config); |
| 42 | bu32 counter, period, width; |
| 43 | }; |
| 44 | #define mmr_base() offsetof(struct bfin_gptimer, config) |
| 45 | #define mmr_offset(mmr) (offsetof(struct bfin_gptimer, mmr) - mmr_base()) |
| 46 | |
| 47 | static const char * const mmr_names[] = |
| 48 | { |
| 49 | "TIMER_CONFIG", "TIMER_COUNTER", "TIMER_PERIOD", "TIMER_WIDTH", |
| 50 | }; |
| 51 | #define mmr_name(off) mmr_names[(off) / 4] |
| 52 | |
| 53 | static unsigned |
| 54 | bfin_gptimer_io_write_buffer (struct hw *me, const void *source, int space, |
| 55 | address_word addr, unsigned nr_bytes) |
| 56 | { |
| 57 | struct bfin_gptimer *gptimer = hw_data (me); |
| 58 | bu32 mmr_off; |
| 59 | bu32 value; |
| 60 | bu16 *value16p; |
| 61 | bu32 *value32p; |
| 62 | void *valuep; |
| 63 | |
| 64 | if (nr_bytes == 4) |
| 65 | value = dv_load_4 (source); |
| 66 | else |
| 67 | value = dv_load_2 (source); |
| 68 | |
| 69 | mmr_off = addr - gptimer->base; |
| 70 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); |
| 71 | value16p = valuep; |
| 72 | value32p = valuep; |
| 73 | |
| 74 | HW_TRACE_WRITE (); |
| 75 | |
| 76 | switch (mmr_off) |
| 77 | { |
| 78 | case mmr_offset(config): |
| 79 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, true); |
| 80 | *value16p = value; |
| 81 | break; |
| 82 | case mmr_offset(counter): |
| 83 | case mmr_offset(period): |
| 84 | case mmr_offset(width): |
| 85 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, true); |
| 86 | *value32p = value; |
| 87 | break; |
| 88 | default: |
| 89 | dv_bfin_mmr_invalid (me, addr, nr_bytes, true); |
| 90 | break; |
| 91 | } |
| 92 | |
| 93 | return nr_bytes; |
| 94 | } |
| 95 | |
| 96 | static unsigned |
| 97 | bfin_gptimer_io_read_buffer (struct hw *me, void *dest, int space, |
| 98 | address_word addr, unsigned nr_bytes) |
| 99 | { |
| 100 | struct bfin_gptimer *gptimer = hw_data (me); |
| 101 | bu32 mmr_off; |
| 102 | bu16 *value16p; |
| 103 | bu32 *value32p; |
| 104 | void *valuep; |
| 105 | |
| 106 | mmr_off = addr - gptimer->base; |
| 107 | valuep = (void *)((unsigned long)gptimer + mmr_base() + mmr_off); |
| 108 | value16p = valuep; |
| 109 | value32p = valuep; |
| 110 | |
| 111 | HW_TRACE_READ (); |
| 112 | |
| 113 | switch (mmr_off) |
| 114 | { |
| 115 | case mmr_offset(config): |
| 116 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, false); |
| 117 | dv_store_2 (dest, *value16p); |
| 118 | break; |
| 119 | case mmr_offset(counter): |
| 120 | case mmr_offset(period): |
| 121 | case mmr_offset(width): |
| 122 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, false); |
| 123 | dv_store_4 (dest, *value32p); |
| 124 | break; |
| 125 | default: |
| 126 | dv_bfin_mmr_invalid (me, addr, nr_bytes, false); |
| 127 | break; |
| 128 | } |
| 129 | |
| 130 | return nr_bytes; |
| 131 | } |
| 132 | |
| 133 | static const struct hw_port_descriptor bfin_gptimer_ports[] = |
| 134 | { |
| 135 | { "stat", 0, 0, output_port, }, |
| 136 | { NULL, 0, 0, 0, }, |
| 137 | }; |
| 138 | |
| 139 | static void |
| 140 | attach_bfin_gptimer_regs (struct hw *me, struct bfin_gptimer *gptimer) |
| 141 | { |
| 142 | address_word attach_address; |
| 143 | int attach_space; |
| 144 | unsigned attach_size; |
| 145 | reg_property_spec reg; |
| 146 | |
| 147 | if (hw_find_property (me, "reg") == NULL) |
| 148 | hw_abort (me, "Missing \"reg\" property"); |
| 149 | |
| 150 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) |
| 151 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); |
| 152 | |
| 153 | hw_unit_address_to_attach_address (hw_parent (me), |
| 154 | ®.address, |
| 155 | &attach_space, &attach_address, me); |
| 156 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); |
| 157 | |
| 158 | if (attach_size != BFIN_MMR_GPTIMER_SIZE) |
| 159 | hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_GPTIMER_SIZE); |
| 160 | |
| 161 | hw_attach_address (hw_parent (me), |
| 162 | 0, attach_space, attach_address, attach_size, me); |
| 163 | |
| 164 | gptimer->base = attach_address; |
| 165 | } |
| 166 | |
| 167 | static void |
| 168 | bfin_gptimer_finish (struct hw *me) |
| 169 | { |
| 170 | struct bfin_gptimer *gptimer; |
| 171 | |
| 172 | gptimer = HW_ZALLOC (me, struct bfin_gptimer); |
| 173 | |
| 174 | set_hw_data (me, gptimer); |
| 175 | set_hw_io_read_buffer (me, bfin_gptimer_io_read_buffer); |
| 176 | set_hw_io_write_buffer (me, bfin_gptimer_io_write_buffer); |
| 177 | set_hw_ports (me, bfin_gptimer_ports); |
| 178 | |
| 179 | attach_bfin_gptimer_regs (me, gptimer); |
| 180 | } |
| 181 | |
| 182 | const struct hw_descriptor dv_bfin_gptimer_descriptor[] = |
| 183 | { |
| 184 | {"bfin_gptimer", bfin_gptimer_finish,}, |
| 185 | {NULL, NULL}, |
| 186 | }; |