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
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
|
/*
* Cobalt CPLD functions
*
* Copyright 2012-2015 Cisco Systems, Inc. and/or its affiliates.
* All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/delay.h>
#include "cobalt-cpld.h"
#define ADRS(offset) (COBALT_BUS_CPLD_BASE + offset)
static u16 cpld_read(struct cobalt *cobalt, u32 offset)
{
return cobalt_bus_read32(cobalt->bar1, ADRS(offset));
}
static void cpld_write(struct cobalt *cobalt, u32 offset, u16 val)
{
return cobalt_bus_write32(cobalt->bar1, ADRS(offset), val);
}
static void cpld_info_ver3(struct cobalt *cobalt)
{
u32 rd;
u32 tmp;
cobalt_info("CPLD System control register (read/write)\n");
cobalt_info("\t\tSystem control: 0x%04x (0x0f00)\n",
cpld_read(cobalt, 0));
cobalt_info("CPLD Clock control register (read/write)\n");
cobalt_info("\t\tClock control: 0x%04x (0x0000)\n",
cpld_read(cobalt, 0x04));
cobalt_info("CPLD HSMA Clk Osc register (read/write) - Must set wr trigger to load default values\n");
cobalt_info("\t\tRegister #7:\t0x%04x (0x0022)\n",
cpld_read(cobalt, 0x08));
cobalt_info("\t\tRegister #8:\t0x%04x (0x0047)\n",
cpld_read(cobalt, 0x0c));
cobalt_info("\t\tRegister #9:\t0x%04x (0x00fa)\n",
cpld_read(cobalt, 0x10));
cobalt_info("\t\tRegister #10:\t0x%04x (0x0061)\n",
cpld_read(cobalt, 0x14));
cobalt_info("\t\tRegister #11:\t0x%04x (0x001e)\n",
cpld_read(cobalt, 0x18));
cobalt_info("\t\tRegister #12:\t0x%04x (0x0045)\n",
cpld_read(cobalt, 0x1c));
cobalt_info("\t\tRegister #135:\t0x%04x\n",
cpld_read(cobalt, 0x20));
cobalt_info("\t\tRegister #137:\t0x%04x\n",
cpld_read(cobalt, 0x24));
cobalt_info("CPLD System status register (read only)\n");
cobalt_info("\t\tSystem status: 0x%04x\n",
cpld_read(cobalt, 0x28));
cobalt_info("CPLD MAXII info register (read only)\n");
cobalt_info("\t\tBoard serial number: 0x%04x\n",
cpld_read(cobalt, 0x2c));
cobalt_info("\t\tMAXII program revision: 0x%04x\n",
cpld_read(cobalt, 0x30));
cobalt_info("CPLD temp and voltage ADT7411 registers (read only)\n");
cobalt_info("\t\tBoard temperature: %u Celcius\n",
cpld_read(cobalt, 0x34) / 4);
cobalt_info("\t\tFPGA temperature: %u Celcius\n",
cpld_read(cobalt, 0x38) / 4);
rd = cpld_read(cobalt, 0x3c);
tmp = (rd * 33 * 1000) / (483 * 10);
cobalt_info("\t\tVDD 3V3: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x40);
tmp = (rd * 74 * 2197) / (27 * 1000);
cobalt_info("\t\tADC ch3 5V: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x44);
tmp = (rd * 74 * 2197) / (47 * 1000);
cobalt_info("\t\tADC ch4 3V: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x48);
tmp = (rd * 57 * 2197) / (47 * 1000);
cobalt_info("\t\tADC ch5 2V5: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x4c);
tmp = (rd * 2197) / 1000;
cobalt_info("\t\tADC ch6 1V8: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x50);
tmp = (rd * 2197) / 1000;
cobalt_info("\t\tADC ch7 1V5: %u,%03uV\n", tmp / 1000, tmp % 1000);
rd = cpld_read(cobalt, 0x54);
tmp = (rd * 2197) / 1000;
cobalt_info("\t\tADC ch8 0V9: %u,%03uV\n", tmp / 1000, tmp % 1000);
}
void cobalt_cpld_status(struct cobalt *cobalt)
{
u32 rev = cpld_read(cobalt, 0x30);
switch (rev) {
case 3:
case 4:
case 5:
cpld_info_ver3(cobalt);
break;
default:
cobalt_info("CPLD revision %u is not supported!\n", rev);
break;
}
}
#define DCO_MIN 4850000000ULL
#define DCO_MAX 5670000000ULL
#define SI570_CLOCK_CTRL 0x04
#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER 0x200
#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER 0x100
#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL 0x80
#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN 0x40
#define SI570_REG7 0x08
#define SI570_REG8 0x0c
#define SI570_REG9 0x10
#define SI570_REG10 0x14
#define SI570_REG11 0x18
#define SI570_REG12 0x1c
#define SI570_REG135 0x20
#define SI570_REG137 0x24
struct multiplier {
unsigned mult, hsdiv, n1;
};
/* List all possible multipliers (= hsdiv * n1). There are lots of duplicates,
which are all removed in this list to keep the list as short as possible.
The values for hsdiv and n1 are the actual values, not the register values.
*/
static const struct multiplier multipliers[] = {
{ 4, 4, 1 }, { 5, 5, 1 }, { 6, 6, 1 },
{ 7, 7, 1 }, { 8, 4, 2 }, { 9, 9, 1 },
{ 10, 5, 2 }, { 11, 11, 1 }, { 12, 6, 2 },
{ 14, 7, 2 }, { 16, 4, 4 }, { 18, 9, 2 },
{ 20, 5, 4 }, { 22, 11, 2 }, { 24, 4, 6 },
{ 28, 7, 4 }, { 30, 5, 6 }, { 32, 4, 8 },
{ 36, 6, 6 }, { 40, 4, 10 }, { 42, 7, 6 },
{ 44, 11, 4 }, { 48, 4, 12 }, { 50, 5, 10 },
{ 54, 9, 6 }, { 56, 4, 14 }, { 60, 5, 12 },
{ 64, 4, 16 }, { 66, 11, 6 }, { 70, 5, 14 },
{ 72, 4, 18 }, { 80, 4, 20 }, { 84, 6, 14 },
{ 88, 11, 8 }, { 90, 5, 18 }, { 96, 4, 24 },
{ 98, 7, 14 }, { 100, 5, 20 }, { 104, 4, 26 },
{ 108, 6, 18 }, { 110, 11, 10 }, { 112, 4, 28 },
{ 120, 4, 30 }, { 126, 7, 18 }, { 128, 4, 32 },
{ 130, 5, 26 }, { 132, 11, 12 }, { 136, 4, 34 },
{ 140, 5, 28 }, { 144, 4, 36 }, { 150, 5, 30 },
{ 152, 4, 38 }, { 154, 11, 14 }, { 156, 6, 26 },
{ 160, 4, 40 }, { 162, 9, 18 }, { 168, 4, 42 },
{ 170, 5, 34 }, { 176, 11, 16 }, { 180, 5, 36 },
{ 182, 7, 26 }, { 184, 4, 46 }, { 190, 5, 38 },
{ 192, 4, 48 }, { 196, 7, 28 }, { 198, 11, 18 },
{ 198, 9, 22 }, { 200, 4, 50 }, { 204, 6, 34 },
{ 208, 4, 52 }, { 210, 5, 42 }, { 216, 4, 54 },
{ 220, 11, 20 }, { 224, 4, 56 }, { 228, 6, 38 },
{ 230, 5, 46 }, { 232, 4, 58 }, { 234, 9, 26 },
{ 238, 7, 34 }, { 240, 4, 60 }, { 242, 11, 22 },
{ 248, 4, 62 }, { 250, 5, 50 }, { 252, 6, 42 },
{ 256, 4, 64 }, { 260, 5, 52 }, { 264, 11, 24 },
{ 266, 7, 38 }, { 270, 5, 54 }, { 272, 4, 68 },
{ 276, 6, 46 }, { 280, 4, 70 }, { 286, 11, 26 },
{ 288, 4, 72 }, { 290, 5, 58 }, { 294, 7, 42 },
{ 296, 4, 74 }, { 300, 5, 60 }, { 304, 4, 76 },
{ 306, 9, 34 }, { 308, 11, 28 }, { 310, 5, 62 },
{ 312, 4, 78 }, { 320, 4, 80 }, { 322, 7, 46 },
{ 324, 6, 54 }, { 328, 4, 82 }, { 330, 11, 30 },
{ 336, 4, 84 }, { 340, 5, 68 }, { 342, 9, 38 },
{ 344, 4, 86 }, { 348, 6, 58 }, { 350, 5, 70 },
{ 352, 11, 32 }, { 360, 4, 90 }, { 364, 7, 52 },
{ 368, 4, 92 }, { 370, 5, 74 }, { 372, 6, 62 },
{ 374, 11, 34 }, { 376, 4, 94 }, { 378, 7, 54 },
{ 380, 5, 76 }, { 384, 4, 96 }, { 390, 5, 78 },
{ 392, 4, 98 }, { 396, 11, 36 }, { 400, 4, 100 },
{ 406, 7, 58 }, { 408, 4, 102 }, { 410, 5, 82 },
{ 414, 9, 46 }, { 416, 4, 104 }, { 418, 11, 38 },
{ 420, 5, 84 }, { 424, 4, 106 }, { 430, 5, 86 },
{ 432, 4, 108 }, { 434, 7, 62 }, { 440, 11, 40 },
{ 444, 6, 74 }, { 448, 4, 112 }, { 450, 5, 90 },
{ 456, 4, 114 }, { 460, 5, 92 }, { 462, 11, 42 },
{ 464, 4, 116 }, { 468, 6, 78 }, { 470, 5, 94 },
{ 472, 4, 118 }, { 476, 7, 68 }, { 480, 4, 120 },
{ 484, 11, 44 }, { 486, 9, 54 }, { 488, 4, 122 },
{ 490, 5, 98 }, { 492, 6, 82 }, { 496, 4, 124 },
{ 500, 5, 100 }, { 504, 4, 126 }, { 506, 11, 46 },
{ 510, 5, 102 }, { 512, 4, 128 }, { 516, 6, 86 },
{ 518, 7, 74 }, { 520, 5, 104 }, { 522, 9, 58 },
{ 528, 11, 48 }, { 530, 5, 106 }, { 532, 7, 76 },
{ 540, 5, 108 }, { 546, 7, 78 }, { 550, 11, 50 },
{ 552, 6, 92 }, { 558, 9, 62 }, { 560, 5, 112 },
{ 564, 6, 94 }, { 570, 5, 114 }, { 572, 11, 52 },
{ 574, 7, 82 }, { 576, 6, 96 }, { 580, 5, 116 },
{ 588, 6, 98 }, { 590, 5, 118 }, { 594, 11, 54 },
{ 600, 5, 120 }, { 602, 7, 86 }, { 610, 5, 122 },
{ 612, 6, 102 }, { 616, 11, 56 }, { 620, 5, 124 },
{ 624, 6, 104 }, { 630, 5, 126 }, { 636, 6, 106 },
{ 638, 11, 58 }, { 640, 5, 128 }, { 644, 7, 92 },
{ 648, 6, 108 }, { 658, 7, 94 }, { 660, 11, 60 },
{ 666, 9, 74 }, { 672, 6, 112 }, { 682, 11, 62 },
{ 684, 6, 114 }, { 686, 7, 98 }, { 696, 6, 116 },
{ 700, 7, 100 }, { 702, 9, 78 }, { 704, 11, 64 },
{ 708, 6, 118 }, { 714, 7, 102 }, { 720, 6, 120 },
{ 726, 11, 66 }, { 728, 7, 104 }, { 732, 6, 122 },
{ 738, 9, 82 }, { 742, 7, 106 }, { 744, 6, 124 },
{ 748, 11, 68 }, { 756, 6, 126 }, { 768, 6, 128 },
{ 770, 11, 70 }, { 774, 9, 86 }, { 784, 7, 112 },
{ 792, 11, 72 }, { 798, 7, 114 }, { 810, 9, 90 },
{ 812, 7, 116 }, { 814, 11, 74 }, { 826, 7, 118 },
{ 828, 9, 92 }, { 836, 11, 76 }, { 840, 7, 120 },
{ 846, 9, 94 }, { 854, 7, 122 }, { 858, 11, 78 },
{ 864, 9, 96 }, { 868, 7, 124 }, { 880, 11, 80 },
{ 882, 7, 126 }, { 896, 7, 128 }, { 900, 9, 100 },
{ 902, 11, 82 }, { 918, 9, 102 }, { 924, 11, 84 },
{ 936, 9, 104 }, { 946, 11, 86 }, { 954, 9, 106 },
{ 968, 11, 88 }, { 972, 9, 108 }, { 990, 11, 90 },
{ 1008, 9, 112 }, { 1012, 11, 92 }, { 1026, 9, 114 },
{ 1034, 11, 94 }, { 1044, 9, 116 }, { 1056, 11, 96 },
{ 1062, 9, 118 }, { 1078, 11, 98 }, { 1080, 9, 120 },
{ 1098, 9, 122 }, { 1100, 11, 100 }, { 1116, 9, 124 },
{ 1122, 11, 102 }, { 1134, 9, 126 }, { 1144, 11, 104 },
{ 1152, 9, 128 }, { 1166, 11, 106 }, { 1188, 11, 108 },
{ 1210, 11, 110 }, { 1232, 11, 112 }, { 1254, 11, 114 },
{ 1276, 11, 116 }, { 1298, 11, 118 }, { 1320, 11, 120 },
{ 1342, 11, 122 }, { 1364, 11, 124 }, { 1386, 11, 126 },
{ 1408, 11, 128 },
};
bool cobalt_cpld_set_freq(struct cobalt *cobalt, unsigned f_out)
{
const unsigned f_xtal = 39170000; /* xtal for si598 */
u64 dco;
u64 rfreq;
unsigned delta = 0xffffffff;
unsigned i_best = 0;
unsigned i;
u8 n1, hsdiv;
u8 regs[6];
int found = 0;
u16 clock_ctrl;
int retries = 3;
for (i = 0; i < ARRAY_SIZE(multipliers); i++) {
unsigned mult = multipliers[i].mult;
u32 d;
dco = (u64)f_out * mult;
if (dco < DCO_MIN || dco > DCO_MAX)
continue;
div_u64_rem((dco << 28) + f_xtal / 2, f_xtal, &d);
if (d < delta) {
found = 1;
i_best = i;
delta = d;
}
}
if (!found)
return false;
dco = (u64)f_out * multipliers[i_best].mult;
n1 = multipliers[i_best].n1 - 1;
hsdiv = multipliers[i_best].hsdiv - 4;
rfreq = div_u64(dco << 28, f_xtal);
clock_ctrl = cpld_read(cobalt, SI570_CLOCK_CTRL);
clock_ctrl |= S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL;
clock_ctrl |= S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN;
regs[0] = (hsdiv << 5) | (n1 >> 2);
regs[1] = ((n1 & 0x3) << 6) | (rfreq >> 32);
regs[2] = (rfreq >> 24) & 0xff;
regs[3] = (rfreq >> 16) & 0xff;
regs[4] = (rfreq >> 8) & 0xff;
regs[5] = rfreq & 0xff;
/* The sequence of clock_ctrl flags to set is very weird. It looks
like I have to reset it, then set the new frequency and reset it
again. It shouldn't be necessary to do a reset, but if I don't,
then a strange frequency is set (156.412034 MHz, or register values
0x01, 0xc7, 0xfc, 0x7f, 0x53, 0x62).
*/
cobalt_dbg(1, "%u: %6ph\n", f_out, regs);
while (retries--) {
u8 read_regs[6];
cpld_write(cobalt, SI570_CLOCK_CTRL,
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL);
usleep_range(10000, 15000);
cpld_write(cobalt, SI570_REG7, regs[0]);
cpld_write(cobalt, SI570_REG8, regs[1]);
cpld_write(cobalt, SI570_REG9, regs[2]);
cpld_write(cobalt, SI570_REG10, regs[3]);
cpld_write(cobalt, SI570_REG11, regs[4]);
cpld_write(cobalt, SI570_REG12, regs[5]);
cpld_write(cobalt, SI570_CLOCK_CTRL,
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER);
usleep_range(10000, 15000);
cpld_write(cobalt, SI570_CLOCK_CTRL,
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL);
usleep_range(10000, 15000);
read_regs[0] = cpld_read(cobalt, SI570_REG7);
read_regs[1] = cpld_read(cobalt, SI570_REG8);
read_regs[2] = cpld_read(cobalt, SI570_REG9);
read_regs[3] = cpld_read(cobalt, SI570_REG10);
read_regs[4] = cpld_read(cobalt, SI570_REG11);
read_regs[5] = cpld_read(cobalt, SI570_REG12);
cpld_write(cobalt, SI570_CLOCK_CTRL,
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL |
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER);
usleep_range(10000, 15000);
cpld_write(cobalt, SI570_CLOCK_CTRL,
S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN);
usleep_range(10000, 15000);
if (!memcmp(read_regs, regs, sizeof(read_regs)))
break;
cobalt_dbg(1, "retry: %6ph\n", read_regs);
}
if (2 - retries)
cobalt_info("Needed %d retries\n", 2 - retries);
return true;
}
|
