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1 | // ========== Copyright Header Begin ========================================== |
2 | // | |
3 | // OpenSPARC T2 Processor File: training_sequence_fsm.v | |
4 | // Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved | |
5 | // 4150 Network Circle, Santa Clara, California 95054, U.S.A. | |
6 | // | |
7 | // * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
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; version 2 of the License. | |
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, write to the Free Software | |
20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
21 | // | |
22 | // For the avoidance of doubt, and except that if any non-GPL license | |
23 | // choice is available it will apply instead, Sun elects to use only | |
24 | // the General Public License version 2 (GPLv2) at this time for any | |
25 | // software where a choice of GPL license versions is made | |
26 | // available with the language indicating that GPLv2 or any later version | |
27 | // may be used, or where a choice of which version of the GPL is applied is | |
28 | // otherwise unspecified. | |
29 | // | |
30 | // Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
31 | // CA 95054 USA or visit www.sun.com if you need additional information or | |
32 | // have any questions. | |
33 | // | |
34 | // ========== Copyright Header End ============================================ | |
35 | `ifdef AXIS_FBDIMM_NO_FSR | |
36 | `else | |
37 | module training_sequence_fsm(ps_bit, | |
38 | ps_bit_bar, | |
39 | link_clk,amb_id, | |
40 | training_sequence_start, | |
41 | training_sequence_end, | |
42 | amb_id_ok, | |
43 | frm_align); | |
44 | ||
45 | ||
46 | parameter DS=0; | |
47 | ||
48 | input ps_bit,ps_bit_bar; | |
49 | input link_clk; | |
50 | output [3:0] amb_id; | |
51 | output training_sequence_end; | |
52 | input training_sequence_start; | |
53 | output amb_id_ok; | |
54 | output frm_align; | |
55 | ||
56 | reg [2:0] SB2NB_Map; | |
57 | ||
58 | reg [11:0] tr_reg; | |
59 | reg [4:0] tr_state; | |
60 | reg [4:0] tr_count; | |
61 | reg [11:0] clk_trn_ptrn; | |
62 | reg [3:0] clk_grp; | |
63 | reg ts0_ready_reg; | |
64 | reg [3:0] amb_id_reg; | |
65 | reg [23:0] test_param_reg; | |
66 | reg [7:8] test_param_count; | |
67 | reg frm_align_reg; | |
68 | ||
69 | assign frm_align = frm_align_reg; | |
70 | ||
71 | assign amb_id=amb_id_reg; | |
72 | //assign amb_id_ok = (amb_id_reg == DS) ? 1'b1 : 1'b0; | |
73 | ||
74 | wire training_sequence_start_d12; | |
75 | assign training_sequence_end=ts0_ready_reg; | |
76 | initial begin | |
77 | tr_state=0; | |
78 | tr_count=0; | |
79 | test_param_count=0; | |
80 | end | |
81 | ||
82 | wire [9:0] delay_reg = 10'd12; | |
83 | ||
84 | ||
85 | shifter_p #(1) train_delay (.signal_in ( training_sequence_start ), | |
86 | .signal_out ( training_sequence_start_d12), | |
87 | .delay_cycles (delay_reg), | |
88 | .clk (link_clk)); | |
89 | ||
90 | ||
91 | initial | |
92 | amb_id_reg=0; | |
93 | ||
94 | always@(negedge link_clk) if ( training_sequence_start ) // _d12 && ( ps_bit !== ps_bit_bar) ) | |
95 | begin | |
96 | case(tr_state) | |
97 | `IDLE: begin | |
98 | tr_reg[11:0] = {ps_bit, tr_reg[11:1] }; | |
99 | ||
100 | if ( training_sequence_start_d12 && ( ps_bit !== ps_bit_bar) ) | |
101 | begin | |
102 | // if beginning of ts1 is detected | |
103 | if ( {ps_bit, tr_reg[11:1] } == 12'b111111111110 ) | |
104 | ts0_ready_reg<=1; | |
105 | else | |
106 | ts0_ready_reg<=0; | |
107 | ||
108 | if ( {ps_bit, tr_reg[11:1] } == 12'b101111111110 ) begin | |
109 | tr_state<=`TS_TRAIN_1; | |
110 | ||
111 | `ifdef FBD_DBG | |
112 | // `PR_ALWAYS ("amb_init",`DBG_0,"Detected TRAINING"); | |
113 | `endif | |
114 | frm_align_reg<=1; | |
115 | end | |
116 | else | |
117 | frm_align_reg<=0; | |
118 | end // if training_sequence_start_d12 | |
119 | ||
120 | end | |
121 | `TS_TRAIN_1: begin | |
122 | case(tr_count) | |
123 | 4'b0000: begin tr_reg[0] = ps_bit; tr_count=tr_count+1; end | |
124 | 4'b0001: begin tr_reg[1] = ps_bit; tr_count=tr_count+1; end | |
125 | 4'b0010: begin tr_reg[2] = ps_bit; tr_count=tr_count+1;end | |
126 | 4'b0011: begin tr_reg[3] = ps_bit; tr_count=tr_count+1; end | |
127 | 4'b0100: begin tr_reg[4] = ps_bit; tr_count=tr_count+1; end | |
128 | 4'b0101: begin tr_reg[5] = ps_bit; tr_count=tr_count+1; end | |
129 | 4'b0110: begin tr_reg[6] = ps_bit; tr_count=tr_count+1; end | |
130 | 4'b0111: begin tr_reg[7] = ps_bit; tr_count=tr_count+1; end | |
131 | 4'b1000: begin tr_reg[8] = ps_bit; tr_count=tr_count+1; end | |
132 | 4'b1001: begin tr_reg[9] = ps_bit; tr_count=tr_count+1; end | |
133 | 4'b1010: begin tr_reg[10] = ps_bit; tr_count=tr_count+1; end | |
134 | 4'b1011: begin tr_reg[11] = ps_bit; tr_state<=`TS_TRAIN_2; | |
135 | tr_count=1;clk_grp=0; amb_id_reg[3:0]={tr_reg[11],tr_reg[9],tr_reg[7],tr_reg[5]}; | |
136 | ||
137 | `ifdef FBD_DBG | |
138 | // `PR_ALWAYS ("amb_init",`DBG_4,"Control values: pattern = %h ambid=%h",{tr_reg[10],tr_reg[8],tr_reg[6],tr_reg[4:0]},{tr_reg[11],tr_reg[9],tr_reg[7],tr_reg[5]}); | |
139 | `endif | |
140 | end | |
141 | endcase | |
142 | // tr_count=tr_count+1; | |
143 | end | |
144 | `TS_TRAIN_2: begin // group 11-2: pg 27 of Jedec Spec | |
145 | ||
146 | case(tr_count) | |
147 | 4'b0001: begin clk_trn_ptrn[0] = ps_bit; tr_count=tr_count+1; end | |
148 | 4'b0010: begin clk_trn_ptrn[1] = ps_bit; tr_count=tr_count+1; end | |
149 | 4'b0011: begin clk_trn_ptrn[2] = ps_bit; tr_count=tr_count+1; end | |
150 | 4'b0100: begin clk_trn_ptrn[3] = ps_bit; tr_count=tr_count+1; end | |
151 | 4'b0101: begin clk_trn_ptrn[4] = ps_bit; tr_count=tr_count+1; end | |
152 | 4'b0110: begin clk_trn_ptrn[5] = ps_bit; tr_count=tr_count+1; end | |
153 | 4'b0111: begin clk_trn_ptrn[6] = ps_bit; tr_count=tr_count+1; end | |
154 | 4'b1000: begin clk_trn_ptrn[7] = ps_bit; tr_count=tr_count+1; end | |
155 | 4'b1001: begin clk_trn_ptrn[8] = ps_bit; tr_count=tr_count+1; end | |
156 | 4'b1010: begin clk_trn_ptrn[9] = ps_bit; tr_count=tr_count+1; end | |
157 | 4'b1011: begin clk_trn_ptrn[10] = ps_bit; tr_count=tr_count+1; end | |
158 | 4'b1100: begin clk_trn_ptrn[11] = ps_bit; clk_grp=clk_grp+1; tr_count=1; | |
159 | `ifdef FBD_DBG | |
160 | // `PR_ALWAYS ("amb_init",`DBG_4,"Getting clock training sequence_%h-> %b",clk_grp,clk_trn_ptrn); | |
161 | `endif | |
162 | end | |
163 | endcase | |
164 | if ( clk_grp == 4'ha ) | |
165 | begin | |
166 | tr_state<=`IDLE; | |
167 | end | |
168 | end | |
169 | endcase | |
170 | ||
171 | ||
172 | end | |
173 | else | |
174 | ts0_ready_reg<=0; | |
175 | ||
176 | endmodule | |
177 | ||
178 | ||
179 | ||
180 | ||
181 | module training_sequence_fsm_chk(ps_bit,ps_bit_bar,link_clk,training_sequence_start); | |
182 | ||
183 | ||
184 | parameter DS=0; | |
185 | ||
186 | input ps_bit,ps_bit_bar; | |
187 | input link_clk; | |
188 | input training_sequence_start; | |
189 | ||
190 | ||
191 | reg [2:0] SB2NB_Map; | |
192 | ||
193 | reg [143:0] tr_reg; | |
194 | reg [4:0] tr_state; | |
195 | reg [8:0] tr_count; | |
196 | reg [11:0] clk_trn_ptrn; | |
197 | reg [3:0] clk_grp; | |
198 | reg ts0_ready_reg; | |
199 | reg [3:0] amb_id_reg; | |
200 | reg [23:0] test_param_reg; | |
201 | reg [7:8] test_param_count; | |
202 | reg frm_align_reg; | |
203 | reg [9:0] ts0_frm_cnt; | |
204 | ||
205 | ||
206 | initial begin | |
207 | tr_state=0; | |
208 | tr_count=0; | |
209 | ts0_frm_cnt=0; | |
210 | test_param_count=0; | |
211 | end | |
212 | ||
213 | ||
214 | initial | |
215 | tr_count=0; | |
216 | ||
217 | always@(posedge link_clk) if ( training_sequence_start && (ps_bit !== ps_bit_bar) ) | |
218 | begin | |
219 | case(tr_state) | |
220 | `IDLE: begin | |
221 | //ts0_ready_reg=0; | |
222 | tr_reg[142:0] = tr_reg[143:1]; | |
223 | tr_reg[143] = ps_bit; | |
224 | ||
225 | if (tr_reg[143:132] == 12'b101111111110 ) | |
226 | tr_state=`TS_TRAIN_1; | |
227 | ||
228 | // if beginning of ts1 is detected | |
229 | if (tr_reg[11:0] == 12'b111111111110 ) | |
230 | begin | |
231 | `ifdef AXIS_FBDIMM_HW | |
232 | `else | |
233 | if ( ts0_frm_cnt < 200 ) | |
234 | `PR_ALWAYS ("ch_mon",`DBG_0,"ERROR: Approximate # of TS0 Patterns(268) not met => Only %d frames ",ts0_frm_cnt); | |
235 | `endif | |
236 | ||
237 | end | |
238 | ||
239 | end | |
240 | `TS_TRAIN_1: begin | |
241 | tr_reg[142:0] = tr_reg[143:1]; | |
242 | tr_reg[143] = ps_bit; | |
243 | tr_count=tr_count+1; | |
244 | ||
245 | if ( (tr_count == 8'h84) && (tr_reg[143:0] != 0 ) ) begin | |
246 | ts0_frm_cnt= ts0_frm_cnt +1; | |
247 | `ifdef AXIS_FBDIMM_HW | |
248 | `else | |
249 | if ( tr_reg[11:0] != 12'hbfe ) | |
250 | `PR_ALWAYS ("ch_mon",`DBG_0,"ERROR: bfe pattern not found for training state "); | |
251 | ||
252 | if ( {tr_reg[22],tr_reg[20],tr_reg[18],tr_reg[16:12]} != {1'b0,1'b0,1'b0,5'b01010} ) | |
253 | `PR_ALWAYS ("ch_mon",`DBG_0,"ERROR: grp1 pattern in training is wrong! "); | |
254 | ||
255 | if ( tr_reg[143:24] != 120'haaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ) | |
256 | `PR_ALWAYS ("ch_mon",`DBG_0,"ERROR: clock training patterns has errors in training state "); | |
257 | `endif | |
258 | ||
259 | tr_count=0; | |
260 | tr_state=`IDLE; | |
261 | end | |
262 | end | |
263 | ||
264 | endcase | |
265 | end | |
266 | ||
267 | ||
268 | endmodule | |
269 | ||
270 | ||
271 | `endif // AXIS_FBDIMM_HW |