1 /* Blackfin General Purpose Timers (GPtimer) model
3 Copyright (C) 2010-2015 Free Software Foundation, Inc.
4 Contributed by Analog Devices, Inc.
6 This file is part of simulators.
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.
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.
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/>. */
25 #include "dv-bfin_gptimer.h"
27 /* XXX: This is merely a stub. */
31 /* This top portion matches common dv_bfin struct. */
33 struct hw
*dma_master
;
36 struct hw_event
*handler
;
40 /* Order after here is important -- matches hardware MMR layout. */
41 bu16
BFIN_MMR_16(config
);
42 bu32 counter
, period
, width
;
44 #define mmr_base() offsetof(struct bfin_gptimer, config)
45 #define mmr_offset(mmr) (offsetof(struct bfin_gptimer, mmr) - mmr_base())
47 static const char * const mmr_names
[] =
49 "TIMER_CONFIG", "TIMER_COUNTER", "TIMER_PERIOD", "TIMER_WIDTH",
51 #define mmr_name(off) mmr_names[(off) / 4]
54 bfin_gptimer_io_write_buffer (struct hw
*me
, const void *source
, int space
,
55 address_word addr
, unsigned nr_bytes
)
57 struct bfin_gptimer
*gptimer
= hw_data (me
);
64 /* Invalid access mode is higher priority than missing register. */
65 if (!dv_bfin_mmr_require_16_32 (me
, addr
, nr_bytes
, true))
69 value
= dv_load_4 (source
);
71 value
= dv_load_2 (source
);
73 mmr_off
= addr
- gptimer
->base
;
74 valuep
= (void *)((unsigned long)gptimer
+ mmr_base() + mmr_off
);
82 case mmr_offset(config
):
83 if (!dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, true))
87 case mmr_offset(counter
):
88 case mmr_offset(period
):
89 case mmr_offset(width
):
90 if (!dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, true))
95 dv_bfin_mmr_invalid (me
, addr
, nr_bytes
, true);
103 bfin_gptimer_io_read_buffer (struct hw
*me
, void *dest
, int space
,
104 address_word addr
, unsigned nr_bytes
)
106 struct bfin_gptimer
*gptimer
= hw_data (me
);
112 /* Invalid access mode is higher priority than missing register. */
113 if (!dv_bfin_mmr_require_16_32 (me
, addr
, nr_bytes
, false))
116 mmr_off
= addr
- gptimer
->base
;
117 valuep
= (void *)((unsigned long)gptimer
+ mmr_base() + mmr_off
);
125 case mmr_offset(config
):
126 if (!dv_bfin_mmr_require_16 (me
, addr
, nr_bytes
, false))
128 dv_store_2 (dest
, *value16p
);
130 case mmr_offset(counter
):
131 case mmr_offset(period
):
132 case mmr_offset(width
):
133 if (!dv_bfin_mmr_require_32 (me
, addr
, nr_bytes
, false))
135 dv_store_4 (dest
, *value32p
);
138 dv_bfin_mmr_invalid (me
, addr
, nr_bytes
, false);
145 static const struct hw_port_descriptor bfin_gptimer_ports
[] =
147 { "stat", 0, 0, output_port
, },
152 attach_bfin_gptimer_regs (struct hw
*me
, struct bfin_gptimer
*gptimer
)
154 address_word attach_address
;
156 unsigned attach_size
;
157 reg_property_spec reg
;
159 if (hw_find_property (me
, "reg") == NULL
)
160 hw_abort (me
, "Missing \"reg\" property");
162 if (!hw_find_reg_array_property (me
, "reg", 0, ®
))
163 hw_abort (me
, "\"reg\" property must contain three addr/size entries");
165 hw_unit_address_to_attach_address (hw_parent (me
),
167 &attach_space
, &attach_address
, me
);
168 hw_unit_size_to_attach_size (hw_parent (me
), ®
.size
, &attach_size
, me
);
170 if (attach_size
!= BFIN_MMR_GPTIMER_SIZE
)
171 hw_abort (me
, "\"reg\" size must be %#x", BFIN_MMR_GPTIMER_SIZE
);
173 hw_attach_address (hw_parent (me
),
174 0, attach_space
, attach_address
, attach_size
, me
);
176 gptimer
->base
= attach_address
;
180 bfin_gptimer_finish (struct hw
*me
)
182 struct bfin_gptimer
*gptimer
;
184 gptimer
= HW_ZALLOC (me
, struct bfin_gptimer
);
186 set_hw_data (me
, gptimer
);
187 set_hw_io_read_buffer (me
, bfin_gptimer_io_read_buffer
);
188 set_hw_io_write_buffer (me
, bfin_gptimer_io_write_buffer
);
189 set_hw_ports (me
, bfin_gptimer_ports
);
191 attach_bfin_gptimer_regs (me
, gptimer
);
194 const struct hw_descriptor dv_bfin_gptimer_descriptor
[] =
196 {"bfin_gptimer", bfin_gptimer_finish
,},