1/* Blackfin General Purpose Timers (GPtimer) model 2 3 Copyright (C) 2010-2011 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 29struct 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 47static 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 53static unsigned 54bfin_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 96static unsigned 97bfin_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 133static const struct hw_port_descriptor bfin_gptimer_ports[] = 134{ 135 { "stat", 0, 0, output_port, }, 136 { NULL, 0, 0, 0, }, 137}; 138 139static void 140attach_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 167static void 168bfin_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 182const struct hw_descriptor dv_bfin_gptimer_descriptor[] = 183{ 184 {"bfin_gptimer", bfin_gptimer_finish,}, 185 {NULL, NULL}, 186}; 187