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050396e5 MF |
1 | /* Blackfin Pin Interrupt (PINT) model |
2 | ||
3666a048 | 3 | Copyright (C) 2010-2021 Free Software Foundation, Inc. |
050396e5 MF |
4 | Contributed by Analog Devices, Inc. and Mike Frysinger. |
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 | ||
6df01ab8 MF |
21 | /* This must come before any other includes. */ |
22 | #include "defs.h" | |
050396e5 MF |
23 | |
24 | #include "sim-main.h" | |
25 | #include "devices.h" | |
26 | #include "dv-bfin_pint.h" | |
27 | ||
28 | struct bfin_pint | |
29 | { | |
30 | bu32 base; | |
31 | ||
32 | /* Only accessed indirectly via the associated set/clear MMRs. */ | |
33 | bu32 mask, edge, invert; | |
34 | ||
35 | /* Order after here is important -- matches hardware MMR layout. */ | |
36 | bu32 mask_set; | |
37 | bu32 mask_clear; | |
38 | bu32 request; | |
39 | bu32 assign; | |
40 | bu32 edge_set; | |
41 | bu32 edge_clear; | |
42 | bu32 invert_set; | |
43 | bu32 invert_clear; | |
44 | bu32 pinstate; | |
45 | bu32 latch; | |
46 | }; | |
47 | #define mmr_base() offsetof(struct bfin_pint, mask_set) | |
48 | #define mmr_offset(mmr) (offsetof(struct bfin_pint, mmr) - mmr_base()) | |
49 | ||
50 | static const char * const mmr_names[] = | |
51 | { | |
52 | "PINT_MASK_SET", "PINT_MASK_CLEAR", "PINT_REQUEST", "PINT_ASSIGN", | |
53 | "PINT_EDGE_SET", "PINT_EDGE_CLEAR", "PINT_INVERT_SET", | |
54 | "PINT_INVERT_CLEAR", "PINT_PINSTATE", "PINT_LATCH", | |
55 | }; | |
56 | #define mmr_name(off) mmr_names[(off) / 4] | |
57 | ||
58 | static unsigned | |
59 | bfin_pint_io_write_buffer (struct hw *me, const void *source, int space, | |
60 | address_word addr, unsigned nr_bytes) | |
61 | { | |
62 | struct bfin_pint *pint = hw_data (me); | |
63 | bu32 mmr_off; | |
64 | bu32 value; | |
65 | bu32 *valuep; | |
66 | ||
466b619e MF |
67 | /* Invalid access mode is higher priority than missing register. */ |
68 | /* XXX: The hardware allows 16 or 32 bit accesses ... */ | |
69 | if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, true)) | |
70 | return 0; | |
71 | ||
050396e5 MF |
72 | if (nr_bytes == 4) |
73 | value = dv_load_4 (source); | |
74 | else | |
75 | value = dv_load_2 (source); | |
76 | mmr_off = addr - pint->base; | |
77 | valuep = (void *)((unsigned long)pint + mmr_base() + mmr_off); | |
78 | ||
79 | HW_TRACE_WRITE (); | |
80 | ||
050396e5 MF |
81 | switch (mmr_off) |
82 | { | |
83 | case mmr_offset(request): | |
84 | case mmr_offset(assign): | |
85 | case mmr_offset(pinstate): | |
86 | case mmr_offset(latch): | |
87 | *valuep = value; | |
88 | break; | |
89 | case mmr_offset(mask_set): | |
90 | dv_w1c_4 (&pint->mask, value, -1); | |
91 | break; | |
92 | case mmr_offset(mask_clear): | |
93 | pint->mask |= value; | |
94 | break; | |
95 | case mmr_offset(edge_set): | |
96 | dv_w1c_4 (&pint->edge, value, -1); | |
97 | break; | |
98 | case mmr_offset(edge_clear): | |
99 | pint->edge |= value; | |
100 | break; | |
101 | case mmr_offset(invert_set): | |
102 | dv_w1c_4 (&pint->invert, value, -1); | |
103 | break; | |
104 | case mmr_offset(invert_clear): | |
105 | pint->invert |= value; | |
106 | break; | |
107 | default: | |
108 | dv_bfin_mmr_invalid (me, addr, nr_bytes, true); | |
466b619e | 109 | return 0; |
050396e5 MF |
110 | } |
111 | ||
112 | #if 0 | |
113 | /* If updating masks, make sure we send updated port info. */ | |
114 | switch (mmr_off) | |
115 | { | |
116 | case mmr_offset(dir): | |
117 | case mmr_offset(data) ... mmr_offset(toggle): | |
118 | bfin_pint_forward_ouput (me, pint, data); | |
119 | break; | |
120 | case mmr_offset(maska) ... mmr_offset(maska_toggle): | |
121 | bfin_pint_forward_int (me, pint, pint->maska, 0); | |
122 | break; | |
123 | case mmr_offset(maskb) ... mmr_offset(maskb_toggle): | |
124 | bfin_pint_forward_int (me, pint, pint->maskb, 1); | |
125 | break; | |
126 | } | |
127 | #endif | |
128 | ||
129 | return nr_bytes; | |
130 | } | |
131 | ||
132 | static unsigned | |
133 | bfin_pint_io_read_buffer (struct hw *me, void *dest, int space, | |
134 | address_word addr, unsigned nr_bytes) | |
135 | { | |
136 | struct bfin_pint *pint = hw_data (me); | |
137 | bu32 mmr_off; | |
138 | bu32 *valuep; | |
139 | ||
466b619e MF |
140 | /* Invalid access mode is higher priority than missing register. */ |
141 | /* XXX: The hardware allows 16 or 32 bit accesses ... */ | |
142 | if (!dv_bfin_mmr_require_32 (me, addr, nr_bytes, false)) | |
143 | return 0; | |
144 | ||
050396e5 MF |
145 | mmr_off = addr - pint->base; |
146 | valuep = (void *)((unsigned long)pint + mmr_base() + mmr_off); | |
147 | ||
148 | HW_TRACE_READ (); | |
149 | ||
050396e5 MF |
150 | switch (mmr_off) |
151 | { | |
152 | case mmr_offset(request): | |
153 | case mmr_offset(assign): | |
154 | case mmr_offset(pinstate): | |
155 | case mmr_offset(latch): | |
156 | dv_store_4 (dest, *valuep); | |
157 | break; | |
158 | case mmr_offset(mask_set): | |
159 | case mmr_offset(mask_clear): | |
160 | dv_store_4 (dest, pint->mask); | |
161 | break; | |
162 | case mmr_offset(edge_set): | |
163 | case mmr_offset(edge_clear): | |
164 | dv_store_4 (dest, pint->edge); | |
165 | break; | |
166 | case mmr_offset(invert_set): | |
167 | case mmr_offset(invert_clear): | |
168 | dv_store_4 (dest, pint->invert); | |
169 | break; | |
170 | default: | |
171 | dv_bfin_mmr_invalid (me, addr, nr_bytes, false); | |
466b619e | 172 | return 0; |
050396e5 MF |
173 | } |
174 | ||
175 | return nr_bytes; | |
176 | } | |
177 | ||
178 | #define ENC(bmap, piq) (((bmap) << 8) + (piq)) | |
179 | ||
180 | #define PIQ_PORTS(n) \ | |
181 | { "piq0@"#n, ENC(n, 0), 0, input_port, }, \ | |
182 | { "piq1@"#n, ENC(n, 1), 0, input_port, }, \ | |
183 | { "piq2@"#n, ENC(n, 2), 0, input_port, }, \ | |
184 | { "piq3@"#n, ENC(n, 3), 0, input_port, }, \ | |
185 | { "piq4@"#n, ENC(n, 4), 0, input_port, }, \ | |
186 | { "piq5@"#n, ENC(n, 5), 0, input_port, }, \ | |
187 | { "piq6@"#n, ENC(n, 6), 0, input_port, }, \ | |
188 | { "piq7@"#n, ENC(n, 7), 0, input_port, }, \ | |
189 | { "piq8@"#n, ENC(n, 8), 0, input_port, }, \ | |
190 | { "piq9@"#n, ENC(n, 9), 0, input_port, }, \ | |
191 | { "piq10@"#n, ENC(n, 10), 0, input_port, }, \ | |
192 | { "piq11@"#n, ENC(n, 11), 0, input_port, }, \ | |
193 | { "piq12@"#n, ENC(n, 12), 0, input_port, }, \ | |
194 | { "piq13@"#n, ENC(n, 13), 0, input_port, }, \ | |
195 | { "piq14@"#n, ENC(n, 14), 0, input_port, }, \ | |
196 | { "piq15@"#n, ENC(n, 15), 0, input_port, }, \ | |
197 | { "piq16@"#n, ENC(n, 16), 0, input_port, }, \ | |
198 | { "piq17@"#n, ENC(n, 17), 0, input_port, }, \ | |
199 | { "piq18@"#n, ENC(n, 18), 0, input_port, }, \ | |
200 | { "piq19@"#n, ENC(n, 19), 0, input_port, }, \ | |
201 | { "piq20@"#n, ENC(n, 20), 0, input_port, }, \ | |
202 | { "piq21@"#n, ENC(n, 21), 0, input_port, }, \ | |
203 | { "piq22@"#n, ENC(n, 22), 0, input_port, }, \ | |
204 | { "piq23@"#n, ENC(n, 23), 0, input_port, }, \ | |
205 | { "piq24@"#n, ENC(n, 24), 0, input_port, }, \ | |
206 | { "piq25@"#n, ENC(n, 25), 0, input_port, }, \ | |
207 | { "piq26@"#n, ENC(n, 26), 0, input_port, }, \ | |
208 | { "piq27@"#n, ENC(n, 27), 0, input_port, }, \ | |
209 | { "piq28@"#n, ENC(n, 28), 0, input_port, }, \ | |
210 | { "piq29@"#n, ENC(n, 29), 0, input_port, }, \ | |
211 | { "piq30@"#n, ENC(n, 30), 0, input_port, }, \ | |
212 | { "piq31@"#n, ENC(n, 31), 0, input_port, }, | |
213 | ||
214 | static const struct hw_port_descriptor bfin_pint_ports[] = | |
215 | { | |
216 | { "stat", 0, 0, output_port, }, | |
217 | PIQ_PORTS(0) | |
218 | PIQ_PORTS(1) | |
219 | PIQ_PORTS(2) | |
220 | PIQ_PORTS(3) | |
221 | PIQ_PORTS(4) | |
222 | PIQ_PORTS(5) | |
223 | PIQ_PORTS(6) | |
224 | PIQ_PORTS(7) | |
225 | { NULL, 0, 0, 0, }, | |
226 | }; | |
227 | ||
228 | static void | |
229 | bfin_pint_port_event (struct hw *me, int my_port, struct hw *source, | |
230 | int source_port, int level) | |
231 | { | |
232 | /* XXX: TODO. */ | |
233 | } | |
234 | ||
235 | static void | |
236 | attach_bfin_pint_regs (struct hw *me, struct bfin_pint *pint) | |
237 | { | |
238 | address_word attach_address; | |
239 | int attach_space; | |
240 | unsigned attach_size; | |
241 | reg_property_spec reg; | |
242 | ||
243 | if (hw_find_property (me, "reg") == NULL) | |
244 | hw_abort (me, "Missing \"reg\" property"); | |
245 | ||
246 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) | |
247 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); | |
248 | ||
249 | hw_unit_address_to_attach_address (hw_parent (me), | |
250 | ®.address, | |
251 | &attach_space, &attach_address, me); | |
252 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); | |
253 | ||
254 | if (attach_size != BFIN_MMR_PINT_SIZE) | |
255 | hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_PINT_SIZE); | |
256 | ||
257 | hw_attach_address (hw_parent (me), | |
258 | 0, attach_space, attach_address, attach_size, me); | |
259 | ||
260 | pint->base = attach_address; | |
261 | } | |
262 | ||
263 | static void | |
264 | bfin_pint_finish (struct hw *me) | |
265 | { | |
266 | struct bfin_pint *pint; | |
267 | ||
268 | pint = HW_ZALLOC (me, struct bfin_pint); | |
269 | ||
270 | set_hw_data (me, pint); | |
271 | set_hw_io_read_buffer (me, bfin_pint_io_read_buffer); | |
272 | set_hw_io_write_buffer (me, bfin_pint_io_write_buffer); | |
273 | set_hw_ports (me, bfin_pint_ports); | |
274 | set_hw_port_event (me, bfin_pint_port_event); | |
275 | ||
276 | /* Initialize the PINT. */ | |
277 | switch (dv_get_bus_num (me)) | |
278 | { | |
279 | case 0: | |
280 | pint->assign = 0x00000101; | |
281 | break; | |
282 | case 1: | |
283 | pint->assign = 0x01010000; | |
284 | break; | |
285 | case 2: | |
286 | pint->assign = 0x00000101; | |
287 | break; | |
288 | case 3: | |
289 | pint->assign = 0x02020303; | |
290 | break; | |
291 | default: | |
292 | /* XXX: Should move this default into device tree. */ | |
293 | hw_abort (me, "no support for PINT at this address yet"); | |
294 | } | |
295 | ||
296 | attach_bfin_pint_regs (me, pint); | |
297 | } | |
298 | ||
299 | const struct hw_descriptor dv_bfin_pint_descriptor[] = | |
300 | { | |
301 | {"bfin_pint", bfin_pint_finish,}, | |
302 | {NULL, NULL}, | |
303 | }; |