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8
9#include <linux/delay.h>
10
11#include "cobalt-cpld.h"
12
13#define ADRS(offset) (COBALT_BUS_CPLD_BASE + offset)
14
15static u16 cpld_read(struct cobalt *cobalt, u32 offset)
16{
17 return cobalt_bus_read32(cobalt->bar1, ADRS(offset));
18}
19
20static void cpld_write(struct cobalt *cobalt, u32 offset, u16 val)
21{
22 return cobalt_bus_write32(cobalt->bar1, ADRS(offset), val);
23}
24
25static void cpld_info_ver3(struct cobalt *cobalt)
26{
27 u32 rd;
28 u32 tmp;
29
30 cobalt_info("CPLD System control register (read/write)\n");
31 cobalt_info("\t\tSystem control: 0x%04x (0x0f00)\n",
32 cpld_read(cobalt, 0));
33 cobalt_info("CPLD Clock control register (read/write)\n");
34 cobalt_info("\t\tClock control: 0x%04x (0x0000)\n",
35 cpld_read(cobalt, 0x04));
36 cobalt_info("CPLD HSMA Clk Osc register (read/write) - Must set wr trigger to load default values\n");
37 cobalt_info("\t\tRegister #7:\t0x%04x (0x0022)\n",
38 cpld_read(cobalt, 0x08));
39 cobalt_info("\t\tRegister #8:\t0x%04x (0x0047)\n",
40 cpld_read(cobalt, 0x0c));
41 cobalt_info("\t\tRegister #9:\t0x%04x (0x00fa)\n",
42 cpld_read(cobalt, 0x10));
43 cobalt_info("\t\tRegister #10:\t0x%04x (0x0061)\n",
44 cpld_read(cobalt, 0x14));
45 cobalt_info("\t\tRegister #11:\t0x%04x (0x001e)\n",
46 cpld_read(cobalt, 0x18));
47 cobalt_info("\t\tRegister #12:\t0x%04x (0x0045)\n",
48 cpld_read(cobalt, 0x1c));
49 cobalt_info("\t\tRegister #135:\t0x%04x\n",
50 cpld_read(cobalt, 0x20));
51 cobalt_info("\t\tRegister #137:\t0x%04x\n",
52 cpld_read(cobalt, 0x24));
53 cobalt_info("CPLD System status register (read only)\n");
54 cobalt_info("\t\tSystem status: 0x%04x\n",
55 cpld_read(cobalt, 0x28));
56 cobalt_info("CPLD MAXII info register (read only)\n");
57 cobalt_info("\t\tBoard serial number: 0x%04x\n",
58 cpld_read(cobalt, 0x2c));
59 cobalt_info("\t\tMAXII program revision: 0x%04x\n",
60 cpld_read(cobalt, 0x30));
61 cobalt_info("CPLD temp and voltage ADT7411 registers (read only)\n");
62 cobalt_info("\t\tBoard temperature: %u Celsius\n",
63 cpld_read(cobalt, 0x34) / 4);
64 cobalt_info("\t\tFPGA temperature: %u Celsius\n",
65 cpld_read(cobalt, 0x38) / 4);
66 rd = cpld_read(cobalt, 0x3c);
67 tmp = (rd * 33 * 1000) / (483 * 10);
68 cobalt_info("\t\tVDD 3V3: %u,%03uV\n", tmp / 1000, tmp % 1000);
69 rd = cpld_read(cobalt, 0x40);
70 tmp = (rd * 74 * 2197) / (27 * 1000);
71 cobalt_info("\t\tADC ch3 5V: %u,%03uV\n", tmp / 1000, tmp % 1000);
72 rd = cpld_read(cobalt, 0x44);
73 tmp = (rd * 74 * 2197) / (47 * 1000);
74 cobalt_info("\t\tADC ch4 3V: %u,%03uV\n", tmp / 1000, tmp % 1000);
75 rd = cpld_read(cobalt, 0x48);
76 tmp = (rd * 57 * 2197) / (47 * 1000);
77 cobalt_info("\t\tADC ch5 2V5: %u,%03uV\n", tmp / 1000, tmp % 1000);
78 rd = cpld_read(cobalt, 0x4c);
79 tmp = (rd * 2197) / 1000;
80 cobalt_info("\t\tADC ch6 1V8: %u,%03uV\n", tmp / 1000, tmp % 1000);
81 rd = cpld_read(cobalt, 0x50);
82 tmp = (rd * 2197) / 1000;
83 cobalt_info("\t\tADC ch7 1V5: %u,%03uV\n", tmp / 1000, tmp % 1000);
84 rd = cpld_read(cobalt, 0x54);
85 tmp = (rd * 2197) / 1000;
86 cobalt_info("\t\tADC ch8 0V9: %u,%03uV\n", tmp / 1000, tmp % 1000);
87}
88
89void cobalt_cpld_status(struct cobalt *cobalt)
90{
91 u32 rev = cpld_read(cobalt, 0x30);
92
93 switch (rev) {
94 case 3:
95 case 4:
96 case 5:
97 cpld_info_ver3(cobalt);
98 break;
99 default:
100 cobalt_info("CPLD revision %u is not supported!\n", rev);
101 break;
102 }
103}
104
105#define DCO_MIN 4850000000ULL
106#define DCO_MAX 5670000000ULL
107
108#define SI570_CLOCK_CTRL 0x04
109#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER 0x200
110#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER 0x100
111#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL 0x80
112#define S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN 0x40
113
114#define SI570_REG7 0x08
115#define SI570_REG8 0x0c
116#define SI570_REG9 0x10
117#define SI570_REG10 0x14
118#define SI570_REG11 0x18
119#define SI570_REG12 0x1c
120#define SI570_REG135 0x20
121#define SI570_REG137 0x24
122
123struct multiplier {
124 unsigned mult, hsdiv, n1;
125};
126
127
128
129
130
131static const struct multiplier multipliers[] = {
132 { 4, 4, 1 }, { 5, 5, 1 }, { 6, 6, 1 },
133 { 7, 7, 1 }, { 8, 4, 2 }, { 9, 9, 1 },
134 { 10, 5, 2 }, { 11, 11, 1 }, { 12, 6, 2 },
135 { 14, 7, 2 }, { 16, 4, 4 }, { 18, 9, 2 },
136 { 20, 5, 4 }, { 22, 11, 2 }, { 24, 4, 6 },
137 { 28, 7, 4 }, { 30, 5, 6 }, { 32, 4, 8 },
138 { 36, 6, 6 }, { 40, 4, 10 }, { 42, 7, 6 },
139 { 44, 11, 4 }, { 48, 4, 12 }, { 50, 5, 10 },
140 { 54, 9, 6 }, { 56, 4, 14 }, { 60, 5, 12 },
141 { 64, 4, 16 }, { 66, 11, 6 }, { 70, 5, 14 },
142 { 72, 4, 18 }, { 80, 4, 20 }, { 84, 6, 14 },
143 { 88, 11, 8 }, { 90, 5, 18 }, { 96, 4, 24 },
144 { 98, 7, 14 }, { 100, 5, 20 }, { 104, 4, 26 },
145 { 108, 6, 18 }, { 110, 11, 10 }, { 112, 4, 28 },
146 { 120, 4, 30 }, { 126, 7, 18 }, { 128, 4, 32 },
147 { 130, 5, 26 }, { 132, 11, 12 }, { 136, 4, 34 },
148 { 140, 5, 28 }, { 144, 4, 36 }, { 150, 5, 30 },
149 { 152, 4, 38 }, { 154, 11, 14 }, { 156, 6, 26 },
150 { 160, 4, 40 }, { 162, 9, 18 }, { 168, 4, 42 },
151 { 170, 5, 34 }, { 176, 11, 16 }, { 180, 5, 36 },
152 { 182, 7, 26 }, { 184, 4, 46 }, { 190, 5, 38 },
153 { 192, 4, 48 }, { 196, 7, 28 }, { 198, 11, 18 },
154 { 198, 9, 22 }, { 200, 4, 50 }, { 204, 6, 34 },
155 { 208, 4, 52 }, { 210, 5, 42 }, { 216, 4, 54 },
156 { 220, 11, 20 }, { 224, 4, 56 }, { 228, 6, 38 },
157 { 230, 5, 46 }, { 232, 4, 58 }, { 234, 9, 26 },
158 { 238, 7, 34 }, { 240, 4, 60 }, { 242, 11, 22 },
159 { 248, 4, 62 }, { 250, 5, 50 }, { 252, 6, 42 },
160 { 256, 4, 64 }, { 260, 5, 52 }, { 264, 11, 24 },
161 { 266, 7, 38 }, { 270, 5, 54 }, { 272, 4, 68 },
162 { 276, 6, 46 }, { 280, 4, 70 }, { 286, 11, 26 },
163 { 288, 4, 72 }, { 290, 5, 58 }, { 294, 7, 42 },
164 { 296, 4, 74 }, { 300, 5, 60 }, { 304, 4, 76 },
165 { 306, 9, 34 }, { 308, 11, 28 }, { 310, 5, 62 },
166 { 312, 4, 78 }, { 320, 4, 80 }, { 322, 7, 46 },
167 { 324, 6, 54 }, { 328, 4, 82 }, { 330, 11, 30 },
168 { 336, 4, 84 }, { 340, 5, 68 }, { 342, 9, 38 },
169 { 344, 4, 86 }, { 348, 6, 58 }, { 350, 5, 70 },
170 { 352, 11, 32 }, { 360, 4, 90 }, { 364, 7, 52 },
171 { 368, 4, 92 }, { 370, 5, 74 }, { 372, 6, 62 },
172 { 374, 11, 34 }, { 376, 4, 94 }, { 378, 7, 54 },
173 { 380, 5, 76 }, { 384, 4, 96 }, { 390, 5, 78 },
174 { 392, 4, 98 }, { 396, 11, 36 }, { 400, 4, 100 },
175 { 406, 7, 58 }, { 408, 4, 102 }, { 410, 5, 82 },
176 { 414, 9, 46 }, { 416, 4, 104 }, { 418, 11, 38 },
177 { 420, 5, 84 }, { 424, 4, 106 }, { 430, 5, 86 },
178 { 432, 4, 108 }, { 434, 7, 62 }, { 440, 11, 40 },
179 { 444, 6, 74 }, { 448, 4, 112 }, { 450, 5, 90 },
180 { 456, 4, 114 }, { 460, 5, 92 }, { 462, 11, 42 },
181 { 464, 4, 116 }, { 468, 6, 78 }, { 470, 5, 94 },
182 { 472, 4, 118 }, { 476, 7, 68 }, { 480, 4, 120 },
183 { 484, 11, 44 }, { 486, 9, 54 }, { 488, 4, 122 },
184 { 490, 5, 98 }, { 492, 6, 82 }, { 496, 4, 124 },
185 { 500, 5, 100 }, { 504, 4, 126 }, { 506, 11, 46 },
186 { 510, 5, 102 }, { 512, 4, 128 }, { 516, 6, 86 },
187 { 518, 7, 74 }, { 520, 5, 104 }, { 522, 9, 58 },
188 { 528, 11, 48 }, { 530, 5, 106 }, { 532, 7, 76 },
189 { 540, 5, 108 }, { 546, 7, 78 }, { 550, 11, 50 },
190 { 552, 6, 92 }, { 558, 9, 62 }, { 560, 5, 112 },
191 { 564, 6, 94 }, { 570, 5, 114 }, { 572, 11, 52 },
192 { 574, 7, 82 }, { 576, 6, 96 }, { 580, 5, 116 },
193 { 588, 6, 98 }, { 590, 5, 118 }, { 594, 11, 54 },
194 { 600, 5, 120 }, { 602, 7, 86 }, { 610, 5, 122 },
195 { 612, 6, 102 }, { 616, 11, 56 }, { 620, 5, 124 },
196 { 624, 6, 104 }, { 630, 5, 126 }, { 636, 6, 106 },
197 { 638, 11, 58 }, { 640, 5, 128 }, { 644, 7, 92 },
198 { 648, 6, 108 }, { 658, 7, 94 }, { 660, 11, 60 },
199 { 666, 9, 74 }, { 672, 6, 112 }, { 682, 11, 62 },
200 { 684, 6, 114 }, { 686, 7, 98 }, { 696, 6, 116 },
201 { 700, 7, 100 }, { 702, 9, 78 }, { 704, 11, 64 },
202 { 708, 6, 118 }, { 714, 7, 102 }, { 720, 6, 120 },
203 { 726, 11, 66 }, { 728, 7, 104 }, { 732, 6, 122 },
204 { 738, 9, 82 }, { 742, 7, 106 }, { 744, 6, 124 },
205 { 748, 11, 68 }, { 756, 6, 126 }, { 768, 6, 128 },
206 { 770, 11, 70 }, { 774, 9, 86 }, { 784, 7, 112 },
207 { 792, 11, 72 }, { 798, 7, 114 }, { 810, 9, 90 },
208 { 812, 7, 116 }, { 814, 11, 74 }, { 826, 7, 118 },
209 { 828, 9, 92 }, { 836, 11, 76 }, { 840, 7, 120 },
210 { 846, 9, 94 }, { 854, 7, 122 }, { 858, 11, 78 },
211 { 864, 9, 96 }, { 868, 7, 124 }, { 880, 11, 80 },
212 { 882, 7, 126 }, { 896, 7, 128 }, { 900, 9, 100 },
213 { 902, 11, 82 }, { 918, 9, 102 }, { 924, 11, 84 },
214 { 936, 9, 104 }, { 946, 11, 86 }, { 954, 9, 106 },
215 { 968, 11, 88 }, { 972, 9, 108 }, { 990, 11, 90 },
216 { 1008, 9, 112 }, { 1012, 11, 92 }, { 1026, 9, 114 },
217 { 1034, 11, 94 }, { 1044, 9, 116 }, { 1056, 11, 96 },
218 { 1062, 9, 118 }, { 1078, 11, 98 }, { 1080, 9, 120 },
219 { 1098, 9, 122 }, { 1100, 11, 100 }, { 1116, 9, 124 },
220 { 1122, 11, 102 }, { 1134, 9, 126 }, { 1144, 11, 104 },
221 { 1152, 9, 128 }, { 1166, 11, 106 }, { 1188, 11, 108 },
222 { 1210, 11, 110 }, { 1232, 11, 112 }, { 1254, 11, 114 },
223 { 1276, 11, 116 }, { 1298, 11, 118 }, { 1320, 11, 120 },
224 { 1342, 11, 122 }, { 1364, 11, 124 }, { 1386, 11, 126 },
225 { 1408, 11, 128 },
226};
227
228bool cobalt_cpld_set_freq(struct cobalt *cobalt, unsigned f_out)
229{
230 const unsigned f_xtal = 39170000;
231 u64 dco;
232 u64 rfreq;
233 unsigned delta = 0xffffffff;
234 unsigned i_best = 0;
235 unsigned i;
236 u8 n1, hsdiv;
237 u8 regs[6];
238 int found = 0;
239 u16 clock_ctrl;
240 int retries = 3;
241
242 for (i = 0; i < ARRAY_SIZE(multipliers); i++) {
243 unsigned mult = multipliers[i].mult;
244 u32 d;
245
246 dco = (u64)f_out * mult;
247 if (dco < DCO_MIN || dco > DCO_MAX)
248 continue;
249 div_u64_rem((dco << 28) + f_xtal / 2, f_xtal, &d);
250 if (d < delta) {
251 found = 1;
252 i_best = i;
253 delta = d;
254 }
255 }
256 if (!found)
257 return false;
258 dco = (u64)f_out * multipliers[i_best].mult;
259 n1 = multipliers[i_best].n1 - 1;
260 hsdiv = multipliers[i_best].hsdiv - 4;
261 rfreq = div_u64(dco << 28, f_xtal);
262
263 clock_ctrl = cpld_read(cobalt, SI570_CLOCK_CTRL);
264 clock_ctrl |= S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL;
265 clock_ctrl |= S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN;
266
267 regs[0] = (hsdiv << 5) | (n1 >> 2);
268 regs[1] = ((n1 & 0x3) << 6) | (rfreq >> 32);
269 regs[2] = (rfreq >> 24) & 0xff;
270 regs[3] = (rfreq >> 16) & 0xff;
271 regs[4] = (rfreq >> 8) & 0xff;
272 regs[5] = rfreq & 0xff;
273
274
275
276
277
278
279
280
281 cobalt_dbg(1, "%u: %6ph\n", f_out, regs);
282
283 while (retries--) {
284 u8 read_regs[6];
285
286 cpld_write(cobalt, SI570_CLOCK_CTRL,
287 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
288 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL);
289 usleep_range(10000, 15000);
290 cpld_write(cobalt, SI570_REG7, regs[0]);
291 cpld_write(cobalt, SI570_REG8, regs[1]);
292 cpld_write(cobalt, SI570_REG9, regs[2]);
293 cpld_write(cobalt, SI570_REG10, regs[3]);
294 cpld_write(cobalt, SI570_REG11, regs[4]);
295 cpld_write(cobalt, SI570_REG12, regs[5]);
296 cpld_write(cobalt, SI570_CLOCK_CTRL,
297 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
298 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_WR_TRIGGER);
299 usleep_range(10000, 15000);
300 cpld_write(cobalt, SI570_CLOCK_CTRL,
301 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
302 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL);
303 usleep_range(10000, 15000);
304 read_regs[0] = cpld_read(cobalt, SI570_REG7);
305 read_regs[1] = cpld_read(cobalt, SI570_REG8);
306 read_regs[2] = cpld_read(cobalt, SI570_REG9);
307 read_regs[3] = cpld_read(cobalt, SI570_REG10);
308 read_regs[4] = cpld_read(cobalt, SI570_REG11);
309 read_regs[5] = cpld_read(cobalt, SI570_REG12);
310 cpld_write(cobalt, SI570_CLOCK_CTRL,
311 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN |
312 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_FPGA_CTRL |
313 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_RST_TRIGGER);
314 usleep_range(10000, 15000);
315 cpld_write(cobalt, SI570_CLOCK_CTRL,
316 S01755_REG_CLOCK_CTRL_BITMAP_CLKHSMA_EN);
317 usleep_range(10000, 15000);
318
319 if (!memcmp(read_regs, regs, sizeof(read_regs)))
320 break;
321 cobalt_dbg(1, "retry: %6ph\n", read_regs);
322 }
323 if (2 - retries)
324 cobalt_info("Needed %d retries\n", 2 - retries);
325
326 return true;
327}
328
