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ef016f83 MF |
1 | /* Blackfin Enhanced Parallel Port Interface (EPPI) model |
2 | For "new style" PPIs on BF54x/etc... parts. | |
3 | ||
ecd75fc8 | 4 | Copyright (C) 2010-2014 Free Software Foundation, Inc. |
ef016f83 MF |
5 | Contributed by Analog Devices, Inc. |
6 | ||
7 | This file is part of simulators. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "config.h" | |
23 | ||
24 | #include "sim-main.h" | |
25 | #include "devices.h" | |
26 | #include "dv-bfin_eppi.h" | |
27 | #include "gui.h" | |
28 | ||
29 | /* XXX: TX is merely a stub. */ | |
30 | ||
31 | struct bfin_eppi | |
32 | { | |
33 | /* This top portion matches common dv_bfin struct. */ | |
34 | bu32 base; | |
35 | struct hw *dma_master; | |
36 | bool acked; | |
37 | ||
38 | struct hw_event *handler; | |
39 | char saved_byte; | |
40 | int saved_count; | |
41 | ||
42 | /* GUI state. */ | |
43 | void *gui_state; | |
44 | int color; | |
45 | ||
46 | /* Order after here is important -- matches hardware MMR layout. */ | |
47 | bu16 BFIN_MMR_16(status); | |
48 | bu16 BFIN_MMR_16(hcount); | |
49 | bu16 BFIN_MMR_16(hdelay); | |
50 | bu16 BFIN_MMR_16(vcount); | |
51 | bu16 BFIN_MMR_16(vdelay); | |
52 | bu16 BFIN_MMR_16(frame); | |
53 | bu16 BFIN_MMR_16(line); | |
54 | bu16 BFIN_MMR_16(clkdiv); | |
55 | bu32 control, fs1w_hbl, fs1p_avpl, fsw2_lvb, fs2p_lavf, clip, err; | |
56 | }; | |
57 | #define mmr_base() offsetof(struct bfin_eppi, status) | |
58 | #define mmr_offset(mmr) (offsetof(struct bfin_eppi, mmr) - mmr_base()) | |
59 | ||
990d19fd MF |
60 | static const char * const mmr_names[] = |
61 | { | |
ef016f83 MF |
62 | "EPPI_STATUS", "EPPI_HCOUNT", "EPPI_HDELAY", "EPPI_VCOUNT", "EPPI_VDELAY", |
63 | "EPPI_FRAME", "EPPI_LINE", "EPPI_CLKDIV", "EPPI_CONTROL", "EPPI_FS1W_HBL", | |
64 | "EPPI_FS1P_AVPL", "EPPI_FS2W_LVB", "EPPI_FS2P_LAVF", "EPPI_CLIP", "EPPI_ERR", | |
65 | }; | |
66 | #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>") | |
67 | ||
68 | static void | |
69 | bfin_eppi_gui_setup (struct bfin_eppi *eppi) | |
70 | { | |
71 | /* If we are in RX mode, nothing to do. */ | |
72 | if (!(eppi->control & PORT_DIR)) | |
73 | return; | |
74 | ||
75 | eppi->gui_state = bfin_gui_setup (eppi->gui_state, | |
76 | eppi->control & PORT_EN, | |
77 | eppi->hcount, | |
78 | eppi->vcount, | |
79 | eppi->color); | |
80 | } | |
81 | ||
82 | static unsigned | |
83 | bfin_eppi_io_write_buffer (struct hw *me, const void *source, | |
84 | int space, address_word addr, unsigned nr_bytes) | |
85 | { | |
86 | struct bfin_eppi *eppi = hw_data (me); | |
87 | bu32 mmr_off; | |
88 | bu32 value; | |
89 | bu16 *value16p; | |
90 | bu32 *value32p; | |
91 | void *valuep; | |
92 | ||
93 | if (nr_bytes == 4) | |
94 | value = dv_load_4 (source); | |
95 | else | |
96 | value = dv_load_2 (source); | |
97 | ||
98 | mmr_off = addr - eppi->base; | |
99 | valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off); | |
100 | value16p = valuep; | |
101 | value32p = valuep; | |
102 | ||
103 | HW_TRACE_WRITE (); | |
104 | ||
105 | switch (mmr_off) | |
106 | { | |
107 | case mmr_offset(status): | |
108 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, true); | |
9922f803 | 109 | dv_w1c_2 (value16p, value, 0x1ff); |
ef016f83 MF |
110 | break; |
111 | case mmr_offset(hcount): | |
112 | case mmr_offset(hdelay): | |
113 | case mmr_offset(vcount): | |
114 | case mmr_offset(vdelay): | |
115 | case mmr_offset(frame): | |
116 | case mmr_offset(line): | |
117 | case mmr_offset(clkdiv): | |
118 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, true); | |
119 | *value16p = value; | |
120 | break; | |
121 | case mmr_offset(control): | |
122 | *value32p = value; | |
123 | bfin_eppi_gui_setup (eppi); | |
124 | break; | |
125 | case mmr_offset(fs1w_hbl): | |
126 | case mmr_offset(fs1p_avpl): | |
127 | case mmr_offset(fsw2_lvb): | |
128 | case mmr_offset(fs2p_lavf): | |
129 | case mmr_offset(clip): | |
130 | case mmr_offset(err): | |
131 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, true); | |
132 | *value32p = value; | |
133 | break; | |
134 | default: | |
135 | dv_bfin_mmr_invalid (me, addr, nr_bytes, true); | |
136 | break; | |
137 | } | |
138 | ||
139 | return nr_bytes; | |
140 | } | |
141 | ||
142 | static unsigned | |
143 | bfin_eppi_io_read_buffer (struct hw *me, void *dest, | |
144 | int space, address_word addr, unsigned nr_bytes) | |
145 | { | |
146 | struct bfin_eppi *eppi = hw_data (me); | |
147 | bu32 mmr_off; | |
148 | bu16 *value16p; | |
149 | bu32 *value32p; | |
150 | void *valuep; | |
151 | ||
152 | mmr_off = addr - eppi->base; | |
153 | valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off); | |
154 | value16p = valuep; | |
155 | value32p = valuep; | |
156 | ||
157 | HW_TRACE_READ (); | |
158 | ||
159 | switch (mmr_off) | |
160 | { | |
161 | case mmr_offset(status): | |
162 | case mmr_offset(hcount): | |
163 | case mmr_offset(hdelay): | |
164 | case mmr_offset(vcount): | |
165 | case mmr_offset(vdelay): | |
166 | case mmr_offset(frame): | |
167 | case mmr_offset(line): | |
168 | case mmr_offset(clkdiv): | |
169 | dv_bfin_mmr_require_16 (me, addr, nr_bytes, false); | |
170 | dv_store_2 (dest, *value16p); | |
171 | break; | |
172 | case mmr_offset(control): | |
173 | case mmr_offset(fs1w_hbl): | |
174 | case mmr_offset(fs1p_avpl): | |
175 | case mmr_offset(fsw2_lvb): | |
176 | case mmr_offset(fs2p_lavf): | |
177 | case mmr_offset(clip): | |
178 | case mmr_offset(err): | |
179 | dv_bfin_mmr_require_32 (me, addr, nr_bytes, false); | |
180 | dv_store_4 (dest, *value32p); | |
181 | break; | |
182 | default: | |
183 | dv_bfin_mmr_invalid (me, addr, nr_bytes, false); | |
184 | break; | |
185 | } | |
186 | ||
187 | return nr_bytes; | |
188 | } | |
189 | ||
190 | static unsigned | |
191 | bfin_eppi_dma_read_buffer (struct hw *me, void *dest, int space, | |
192 | unsigned_word addr, unsigned nr_bytes) | |
193 | { | |
194 | HW_TRACE_DMA_READ (); | |
195 | return 0; | |
196 | } | |
197 | ||
198 | static unsigned | |
199 | bfin_eppi_dma_write_buffer (struct hw *me, const void *source, | |
200 | int space, unsigned_word addr, | |
201 | unsigned nr_bytes, | |
202 | int violate_read_only_section) | |
203 | { | |
204 | struct bfin_eppi *eppi = hw_data (me); | |
205 | ||
206 | HW_TRACE_DMA_WRITE (); | |
207 | ||
208 | return bfin_gui_update (eppi->gui_state, source, nr_bytes); | |
209 | } | |
210 | ||
990d19fd MF |
211 | static const struct hw_port_descriptor bfin_eppi_ports[] = |
212 | { | |
ef016f83 MF |
213 | { "stat", 0, 0, output_port, }, |
214 | { NULL, 0, 0, 0, }, | |
215 | }; | |
216 | ||
217 | static void | |
218 | attach_bfin_eppi_regs (struct hw *me, struct bfin_eppi *eppi) | |
219 | { | |
220 | address_word attach_address; | |
221 | int attach_space; | |
222 | unsigned attach_size; | |
223 | reg_property_spec reg; | |
224 | ||
225 | if (hw_find_property (me, "reg") == NULL) | |
226 | hw_abort (me, "Missing \"reg\" property"); | |
227 | ||
228 | if (!hw_find_reg_array_property (me, "reg", 0, ®)) | |
229 | hw_abort (me, "\"reg\" property must contain three addr/size entries"); | |
230 | ||
231 | hw_unit_address_to_attach_address (hw_parent (me), | |
232 | ®.address, | |
233 | &attach_space, &attach_address, me); | |
234 | hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me); | |
235 | ||
236 | if (attach_size != BFIN_MMR_EPPI_SIZE) | |
237 | hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EPPI_SIZE); | |
238 | ||
239 | hw_attach_address (hw_parent (me), | |
240 | 0, attach_space, attach_address, attach_size, me); | |
241 | ||
242 | eppi->base = attach_address; | |
243 | } | |
244 | ||
245 | static void | |
246 | bfin_eppi_finish (struct hw *me) | |
247 | { | |
248 | struct bfin_eppi *eppi; | |
249 | const char *color; | |
250 | ||
251 | eppi = HW_ZALLOC (me, struct bfin_eppi); | |
252 | ||
253 | set_hw_data (me, eppi); | |
254 | set_hw_io_read_buffer (me, bfin_eppi_io_read_buffer); | |
255 | set_hw_io_write_buffer (me, bfin_eppi_io_write_buffer); | |
256 | set_hw_dma_read_buffer (me, bfin_eppi_dma_read_buffer); | |
257 | set_hw_dma_write_buffer (me, bfin_eppi_dma_write_buffer); | |
258 | set_hw_ports (me, bfin_eppi_ports); | |
259 | ||
260 | attach_bfin_eppi_regs (me, eppi); | |
261 | ||
262 | /* Initialize the EPPI. */ | |
263 | if (hw_find_property (me, "color")) | |
264 | color = hw_find_string_property (me, "color"); | |
265 | else | |
266 | color = NULL; | |
267 | eppi->color = bfin_gui_color (color); | |
268 | } | |
269 | ||
81d126c3 MF |
270 | const struct hw_descriptor dv_bfin_eppi_descriptor[] = |
271 | { | |
ef016f83 MF |
272 | {"bfin_eppi", bfin_eppi_finish,}, |
273 | {NULL, NULL}, | |
274 | }; |