1 /* Blackfin Enhanced Parallel Port Interface (EPPI) model
2 For "new style" PPIs on BF54x/etc... parts.
4 Copyright (C) 2010-2011 Free Software Foundation, Inc.
5 Contributed by Analog Devices, Inc.
7 This file is part of simulators.
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.
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.
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/>. */
26 #include "dv-bfin_eppi.h"
29 /* XXX: TX is merely a stub. */
33 /* This top portion matches common dv_bfin struct. */
35 struct hw *dma_master;
38 struct hw_event *handler;
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;
57 #define mmr_base() offsetof(struct bfin_eppi, status)
58 #define mmr_offset(mmr) (offsetof(struct bfin_eppi, mmr) - mmr_base())
60 static const char * const mmr_names[] =
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",
66 #define mmr_name(off) (mmr_names[(off) / 4] ? : "<INV>")
69 bfin_eppi_gui_setup (struct bfin_eppi *eppi)
71 /* If we are in RX mode, nothing to do. */
72 if (!(eppi->control & PORT_DIR))
75 eppi->gui_state = bfin_gui_setup (eppi->gui_state,
76 eppi->control & PORT_EN,
83 bfin_eppi_io_write_buffer (struct hw *me, const void *source,
84 int space, address_word addr, unsigned nr_bytes)
86 struct bfin_eppi *eppi = hw_data (me);
94 value = dv_load_4 (source);
96 value = dv_load_2 (source);
98 mmr_off = addr - eppi->base;
99 valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off);
107 case mmr_offset(status):
108 dv_bfin_mmr_require_16 (me, addr, nr_bytes, true);
109 dv_w1c_2 (value16p, value, 0);
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);
121 case mmr_offset(control):
123 bfin_eppi_gui_setup (eppi);
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);
135 dv_bfin_mmr_invalid (me, addr, nr_bytes, true);
143 bfin_eppi_io_read_buffer (struct hw *me, void *dest,
144 int space, address_word addr, unsigned nr_bytes)
146 struct bfin_eppi *eppi = hw_data (me);
152 mmr_off = addr - eppi->base;
153 valuep = (void *)((unsigned long)eppi + mmr_base() + mmr_off);
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);
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);
183 dv_bfin_mmr_invalid (me, addr, nr_bytes, false);
191 bfin_eppi_dma_read_buffer (struct hw *me, void *dest, int space,
192 unsigned_word addr, unsigned nr_bytes)
194 HW_TRACE_DMA_READ ();
199 bfin_eppi_dma_write_buffer (struct hw *me, const void *source,
200 int space, unsigned_word addr,
202 int violate_read_only_section)
204 struct bfin_eppi *eppi = hw_data (me);
206 HW_TRACE_DMA_WRITE ();
208 return bfin_gui_update (eppi->gui_state, source, nr_bytes);
211 static const struct hw_port_descriptor bfin_eppi_ports[] =
213 { "stat", 0, 0, output_port, },
218 attach_bfin_eppi_regs (struct hw *me, struct bfin_eppi *eppi)
220 address_word attach_address;
222 unsigned attach_size;
223 reg_property_spec reg;
225 if (hw_find_property (me, "reg") == NULL)
226 hw_abort (me, "Missing \"reg\" property");
228 if (!hw_find_reg_array_property (me, "reg", 0, ®))
229 hw_abort (me, "\"reg\" property must contain three addr/size entries");
231 hw_unit_address_to_attach_address (hw_parent (me),
233 &attach_space, &attach_address, me);
234 hw_unit_size_to_attach_size (hw_parent (me), ®.size, &attach_size, me);
236 if (attach_size != BFIN_MMR_EPPI_SIZE)
237 hw_abort (me, "\"reg\" size must be %#x", BFIN_MMR_EPPI_SIZE);
239 hw_attach_address (hw_parent (me),
240 0, attach_space, attach_address, attach_size, me);
242 eppi->base = attach_address;
246 bfin_eppi_finish (struct hw *me)
248 struct bfin_eppi *eppi;
251 eppi = HW_ZALLOC (me, struct bfin_eppi);
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);
260 attach_bfin_eppi_regs (me, eppi);
262 /* Initialize the EPPI. */
263 if (hw_find_property (me, "color"))
264 color = hw_find_string_property (me, "color");
267 eppi->color = bfin_gui_color (color);
270 const struct hw_descriptor dv_bfin_eppi_descriptor[] =
272 {"bfin_eppi", bfin_eppi_finish,},