1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
-------------------------------------------------------------------------------
--
-- SD/MMC Bootloader
-- Chip toplevel design with MMC feature set
--
-- $Id: chip-mmc-a.vhd,v 1.6 2005/04/07 20:44:23 arniml Exp $
--
-- Copyright (c) 2005, Arnim Laeuger (arniml@opencores.org)
--
-- All rights reserved, see COPYING.
--
-- Redistribution and use in source and synthezised forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- Redistributions in synthesized form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- Neither the name of the author nor the names of other contributors may
-- be used to endorse or promote products derived from this software without
-- specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
--
-- Please report bugs to the author, but before you do so, please
-- make sure that this is not a derivative work and that
-- you have the latest version of this file.
--
-- The latest version of this file can be found at:
-- http://www.opencores.org/projects.cgi/web/spi_boot/overview
--
-------------------------------------------------------------------------------
library ieee;
use ieee.std_logic_1164.all;
architecture mmc of chip is
component spi_boot
generic (
width_set_sel_g : integer := 4;
width_bit_cnt_g : integer := 6;
width_img_cnt_g : integer := 2;
num_bits_per_img_g : integer := 18;
sd_init_g : integer := 0;
mmc_compat_clk_div_g : integer := 0;
width_mmc_clk_div_g : integer := 0;
reset_level_g : integer := 0
);
port (
clk_i : in std_logic;
reset_i : in std_logic;
set_sel_i : in std_logic_vector(width_set_sel_g-1 downto 0);
spi_clk_o : out std_logic;
spi_cs_n_o : out std_logic;
spi_data_in_i : in std_logic;
spi_data_out_o : out std_logic;
spi_en_outs_o : out std_logic;
start_i : in std_logic;
mode_i : in std_logic;
config_n_o : out std_logic;
detached_o : out std_logic;
cfg_init_n_i : in std_logic;
cfg_done_i : in std_logic;
dat_done_i : in std_logic;
cfg_clk_o : out std_logic;
cfg_dat_o : out std_logic
);
end component;
signal spi_clk_s : std_logic;
signal spi_cs_n_s : std_logic;
signal spi_data_out_s : std_logic;
signal spi_en_outs_s : std_logic;
signal set_sel_s : std_logic_vector(3 downto 0);
begin
set_sel_s <= not set_sel_n_i;
spi_boot_b : spi_boot
generic map (
width_set_sel_g => 4, -- 16 sets
width_bit_cnt_g => 12, -- 512 bytes per block
width_img_cnt_g => 2, -- 4 images
num_bits_per_img_g => 18, -- 256 kByte per image
sd_init_g => 0, -- no SD specific initialization
mmc_compat_clk_div_g => 13, -- MMC compat 400 kHz > 10 MHz / (13*2)
width_mmc_clk_div_g => 4 -- need 5 bits for MMC compat divider
)
port map (
clk_i => clk_i,
reset_i => reset_i,
set_sel_i => set_sel_s,
spi_clk_o => spi_clk_s,
spi_cs_n_o => spi_cs_n_s,
spi_data_in_i => spi_data_in_i,
spi_data_out_o => spi_data_out_s,
spi_en_outs_o => spi_en_outs_s,
start_i => start_i,
mode_i => mode_i,
config_n_o => config_n_o,
detached_o => detached_o,
cfg_init_n_i => cfg_init_n_i,
cfg_done_i => cfg_done_i,
dat_done_i => dat_done_i,
cfg_clk_o => cfg_clk_o,
cfg_dat_o => cfg_dat_o
);
-----------------------------------------------------------------------------
-- Three state drivers for SPI outputs.
-----------------------------------------------------------------------------
spi_clk_o <= spi_clk_s
when spi_en_outs_s = '1' else
'Z';
spi_cs_n_o <= spi_cs_n_s
when spi_en_outs_s = '1' else
'Z';
spi_data_out_o <= spi_data_out_s
when spi_en_outs_s = '1' else
'Z';
end mmc;
-------------------------------------------------------------------------------
-- File History:
--
-- $Log: chip-mmc-a.vhd,v $
-- Revision 1.6 2005/04/07 20:44:23 arniml
-- add new port detached_o
--
-- Revision 1.5 2005/03/09 19:48:34 arniml
-- invert level of set_sel input
--
-- Revision 1.4 2005/03/08 22:07:12 arniml
-- added set selection
--
-- Revision 1.3 2005/02/18 06:42:13 arniml
-- clarify wording for images
--
-- Revision 1.2 2005/02/16 18:54:39 arniml
-- added tri-state drivers for spi outputs
--
-- Revision 1.1 2005/02/08 20:41:32 arniml
-- initial check-in
--
-------------------------------------------------------------------------------
|
