1 // SPDX-License-Identifier: GPL-2.0+
3 * Keystone2: DDR3 SPD configuration
5 * (C) Copyright 2015-2016 Texas Instruments Incorporated, <www.ti.com>
12 #include <asm/arch/ddr3.h>
13 #include <asm/arch/hardware.h>
15 #define DUMP_DDR_CONFIG 0 /* set to 1 to debug */
16 #define debug_ddr_cfg(fmt, args...) \
17 debug_cond(DUMP_DDR_CONFIG, fmt, ##args)
19 static void dump_phy_config(struct ddr3_phy_config *ptr)
21 debug_ddr_cfg("\npllcr 0x%08X\n", ptr->pllcr);
22 debug_ddr_cfg("pgcr1_mask 0x%08X\n", ptr->pgcr1_mask);
23 debug_ddr_cfg("pgcr1_val 0x%08X\n", ptr->pgcr1_val);
24 debug_ddr_cfg("ptr0 0x%08X\n", ptr->ptr0);
25 debug_ddr_cfg("ptr1 0x%08X\n", ptr->ptr1);
26 debug_ddr_cfg("ptr2 0x%08X\n", ptr->ptr2);
27 debug_ddr_cfg("ptr3 0x%08X\n", ptr->ptr3);
28 debug_ddr_cfg("ptr4 0x%08X\n", ptr->ptr4);
29 debug_ddr_cfg("dcr_mask 0x%08X\n", ptr->dcr_mask);
30 debug_ddr_cfg("dcr_val 0x%08X\n", ptr->dcr_val);
31 debug_ddr_cfg("dtpr0 0x%08X\n", ptr->dtpr0);
32 debug_ddr_cfg("dtpr1 0x%08X\n", ptr->dtpr1);
33 debug_ddr_cfg("dtpr2 0x%08X\n", ptr->dtpr2);
34 debug_ddr_cfg("mr0 0x%08X\n", ptr->mr0);
35 debug_ddr_cfg("mr1 0x%08X\n", ptr->mr1);
36 debug_ddr_cfg("mr2 0x%08X\n", ptr->mr2);
37 debug_ddr_cfg("dtcr 0x%08X\n", ptr->dtcr);
38 debug_ddr_cfg("pgcr2 0x%08X\n", ptr->pgcr2);
39 debug_ddr_cfg("zq0cr1 0x%08X\n", ptr->zq0cr1);
40 debug_ddr_cfg("zq1cr1 0x%08X\n", ptr->zq1cr1);
41 debug_ddr_cfg("zq2cr1 0x%08X\n", ptr->zq2cr1);
42 debug_ddr_cfg("pir_v1 0x%08X\n", ptr->pir_v1);
43 debug_ddr_cfg("pir_v2 0x%08X\n\n", ptr->pir_v2);
46 static void dump_emif_config(struct ddr3_emif_config *ptr)
48 debug_ddr_cfg("\nsdcfg 0x%08X\n", ptr->sdcfg);
49 debug_ddr_cfg("sdtim1 0x%08X\n", ptr->sdtim1);
50 debug_ddr_cfg("sdtim2 0x%08X\n", ptr->sdtim2);
51 debug_ddr_cfg("sdtim3 0x%08X\n", ptr->sdtim3);
52 debug_ddr_cfg("sdtim4 0x%08X\n", ptr->sdtim4);
53 debug_ddr_cfg("zqcfg 0x%08X\n", ptr->zqcfg);
54 debug_ddr_cfg("sdrfc 0x%08X\n\n", ptr->sdrfc);
57 #define TEMP NORMAL_TEMP
58 #define VBUS_CLKPERIOD 1.875 /* Corresponds to vbus=533MHz, */
59 #define PLLGS_VAL (4000.0 / VBUS_CLKPERIOD) /* 4 us */
60 #define PLLPD_VAL (1000.0 / VBUS_CLKPERIOD) /* 1 us */
61 #define PLLLOCK_VAL (100000.0 / VBUS_CLKPERIOD) /* 100 us */
62 #define PLLRST_VAL (9000.0 / VBUS_CLKPERIOD) /* 9 us */
63 #define PHYRST_VAL 0x10
64 #define DDR_TERM RZQ_4_TERM
65 #define SDRAM_DRIVE RZQ_7_IMP
66 #define DYN_ODT ODT_DISABLE
140 static u8 cas_latancy(u16 temp)
145 for (loop = 0; loop < 32; loop += 2, temp >>= 1) {
147 cas_bin = (loop > 15) ? loop - 15 : loop;
153 static int ddr3_get_size_in_mb(ddr3_spd_eeprom_t *buf)
155 return (((buf->organization & 0x38) >> 3) + 1) *
156 (256 << (buf->density_banks & 0xf));
159 static int ddrtimingcalculation(ddr3_spd_eeprom_t *buf, struct ddr3_sodimm *spd,
160 struct ddr3_spd_cb *spd_cb)
164 if ((buf->mem_type != 0x0b) ||
165 ((buf->density_banks & 0x70) != 0x00))
168 spd->sdram_type = 0x03;
171 mtb = buf->mtb_dividend * 1000 / buf->mtb_divisor;
173 spd->t_ck = buf->tck_min * mtb;
175 spd_cb->ddrspdclock = 2000000 / spd->t_ck;
176 clk_freq = spd_cb->ddrspdclock / 2;
178 spd->rank = ((buf->organization & 0x38) >> 3) + 1;
182 spd->pagesize = (buf->addressing & 0x07) + 1;
183 if (spd->pagesize > 3)
186 spd->buswidth = 8 << (buf->bus_width & 0x7);
187 if ((spd->buswidth < 16) || (spd->buswidth > 64))
190 spd->mirrored = buf->mod_section.unbuffered.addr_mapping & 1;
192 printf("DDR3A Speed will be configured for %d Operation.\n",
193 spd_cb->ddrspdclock);
194 if (spd_cb->ddrspdclock == 1333) {
195 spd->t_xp = ((3 * spd->t_ck) > 6000) ?
196 3 : ((5999 / spd->t_ck) + 1);
197 spd->t_cke = ((3 * spd->t_ck) > 5625) ?
198 3 : ((5624 / spd->t_ck) + 1);
199 } else if (spd_cb->ddrspdclock == 1600) {
200 spd->t_xp = ((3 * spd->t_ck) > 6000) ?
201 3 : ((5999 / spd->t_ck) + 1);
202 spd->t_cke = ((3 * spd->t_ck) > 5000) ?
203 3 : ((4999 / spd->t_ck) + 1);
205 printf("Unsupported DDR3 speed %d\n", spd_cb->ddrspdclock);
209 spd->t_xpdll = (spd->t_ck > 2400) ? 10 : 24000 / spd->t_ck;
210 spd->t_ckesr = spd->t_cke + 1;
212 /* SPD Calculated Values */
213 spd->cas = cas_latancy((buf->caslat_msb << 8) |
216 spd->t_wr = (buf->twr_min * mtb) / spd->t_ck;
217 spd->t_wr_bin = (spd->t_wr / 2) & 0x07;
219 spd->t_rcd = ((buf->trcd_min * mtb) - 1) / spd->t_ck + 1;
220 spd->t_rrd = ((buf->trrd_min * mtb) - 1) / spd->t_ck + 1;
221 spd->t_rp = (((buf->trp_min * mtb) - 1) / spd->t_ck) + 1;
223 spd->t_ras = (((buf->tras_trc_ext & 0x0f) << 8 | buf->tras_min_lsb) *
226 spd->t_rc = (((((buf->tras_trc_ext & 0xf0) << 4) | buf->trc_min_lsb) *
227 mtb) - 1) / spd->t_ck + 1;
229 spd->t_rfc = (buf->trfc_min_lsb | (buf->trfc_min_msb << 8)) * mtb /
231 spd->t_wtr = (buf->twtr_min * mtb) / spd->t_ck;
232 spd->t_rtp = (buf->trtp_min * mtb) / spd->t_ck;
234 spd->t_xs = (((spd->t_rfc + 10) * 1000) / spd->t_ck);
235 spd->t_rfc = ((spd->t_rfc * 1000) - 1) / spd->t_ck + 1;
237 spd->t_faw = (((buf->tfaw_msb << 8) | buf->tfaw_min) * mtb) / spd->t_ck;
238 spd->t_rrd2 = ((((buf->tfaw_msb << 8) |
239 buf->tfaw_min) * mtb) / (4 * spd->t_ck)) - 1;
241 /* Hard-coded values */
246 spd->t_xsdll = 0x200;
247 spd->t_ras_max = 0x0F;
251 /* CAS Write Latency */
252 if (spd->t_ck >= 2500)
254 else if (spd->t_ck >= 1875)
256 else if (spd->t_ck >= 1500)
258 else if (spd->t_ck >= 1250)
260 else if (spd->t_ck >= 1071)
265 /* SD:RAM Thermal and Refresh Options */
266 spd->asr = (buf->therm_ref_opt & 0x04) >> 2;
267 spd->pasr = (buf->therm_ref_opt & 0x80) >> 7;
270 spd->t_refprd = (TEMP == NORMAL_TEMP) ? 7812500 : 3906250;
271 spd->t_refprd = spd->t_refprd / spd->t_ck;
273 spd->refresh_rate = spd->t_refprd;
274 spd->t_refprd = spd->t_refprd * 5;
276 /* Set MISC PHY space registers fields */
277 if ((clk_freq / 2) >= 166 && (clk_freq / 2 < 275))
279 else if ((clk_freq / 2) > 225 && (clk_freq / 2 < 385))
281 else if ((clk_freq / 2) > 335 && (clk_freq / 2 < 534))
284 spd->t_dinit0 = 500000000 / spd->t_ck; /* CKE low time 500 us */
285 spd->t_dinit1 = spd->t_xs;
286 spd->t_dinit2 = 200000000 / spd->t_ck; /* Reset low time 200 us */
287 /* Time from ZQ initialization command to first command (1 us) */
288 spd->t_dinit3 = 1000000 / spd->t_ck;
290 spd->t_pllgs = PLLGS_VAL + 1;
291 spd->t_pllpd = PLLPD_VAL + 1;
292 spd->t_plllock = PLLLOCK_VAL + 1;
293 spd->t_pllrst = PLLRST_VAL;
294 spd->t_phyrst = PHYRST_VAL;
296 spd_cb->ddr_size_gbyte = ddr3_get_size_in_mb(buf) / 1024;
301 static void init_ddr3param(struct ddr3_spd_cb *spd_cb,
302 struct ddr3_sodimm *spd)
304 spd_cb->phy_cfg.pllcr = (spd->freqsel & 3) << 18 | 0xE << 13;
305 spd_cb->phy_cfg.pgcr1_mask = (IODDRM_MASK | ZCKSEL_MASK);
306 spd_cb->phy_cfg.pgcr1_val = ((1 << 2) | (1 << 7) | (1 << 23));
307 spd_cb->phy_cfg.ptr0 = ((spd->t_pllpd & 0x7ff) << 21) |
308 ((spd->t_pllgs & 0x7fff) << 6) | (spd->t_phyrst & 0x3f);
309 spd_cb->phy_cfg.ptr1 = ((spd->t_plllock & 0xffff) << 16) |
310 (spd->t_pllrst & 0x1fff);
311 spd_cb->phy_cfg.ptr2 = 0;
312 spd_cb->phy_cfg.ptr3 = ((spd->t_dinit1 & 0x1ff) << 20) |
313 (spd->t_dinit0 & 0xfffff);
314 spd_cb->phy_cfg.ptr4 = ((spd->t_dinit3 & 0x3ff) << 18) |
315 (spd->t_dinit2 & 0x3ffff);
317 spd_cb->phy_cfg.dcr_mask = PDQ_MASK | MPRDQ_MASK | BYTEMASK_MASK;
318 spd_cb->phy_cfg.dcr_val = 1 << 10;
321 spd_cb->phy_cfg.dcr_mask |= NOSRA_MASK | UDIMM_MASK;
322 spd_cb->phy_cfg.dcr_val |= (1 << 27) | (1 << 29);
325 spd_cb->phy_cfg.dtpr0 = (spd->t_rc & 0x3f) << 26 |
326 (spd->t_rrd & 0xf) << 22 |
327 (spd->t_ras & 0x3f) << 16 | (spd->t_rcd & 0xf) << 12 |
328 (spd->t_rp & 0xf) << 8 | (spd->t_wtr & 0xf) << 4 |
330 spd_cb->phy_cfg.dtpr1 = (spd->t_wlo & 0xf) << 26 |
331 (spd->t_wlmrd & 0x3f) << 20 | (spd->t_rfc & 0x1ff) << 11 |
332 (spd->t_faw & 0x3f) << 5 | (spd->t_mod & 0x7) << 2 |
335 spd_cb->phy_cfg.dtpr2 = 0 << 31 | 1 << 30 | 0 << 29 |
336 (spd->t_dllk & 0x3ff) << 19 | (spd->t_ckesr & 0xf) << 15;
338 spd_cb->phy_cfg.dtpr2 |= (((spd->t_xp > spd->t_xpdll) ?
339 spd->t_xp : spd->t_xpdll) &
342 spd_cb->phy_cfg.dtpr2 |= (((spd->t_xs > spd->t_xsdll) ?
343 spd->t_xs : spd->t_xsdll) &
346 spd_cb->phy_cfg.mr0 = 1 << 12 | (spd->t_wr_bin & 0x7) << 9 | 0 << 8 |
347 0 << 7 | ((spd->cas & 0x0E) >> 1) << 4 | 0 << 3 |
348 (spd->cas & 0x01) << 2;
350 spd_cb->phy_cfg.mr1 = 0 << 12 | 0 << 11 | 0 << 7 | 0 << 3 |
351 ((DDR_TERM >> 2) & 1) << 9 | ((DDR_TERM >> 1) & 1) << 6 |
352 (DDR_TERM & 0x1) << 2 | ((SDRAM_DRIVE >> 1) & 1) << 5 |
353 (SDRAM_DRIVE & 1) << 1 | 0 << 0;
355 spd_cb->phy_cfg.mr2 = DYN_ODT << 9 | TEMP << 7 | (spd->asr & 1) << 6 |
356 (spd->cwl & 7) << 3 | (spd->pasr & 7);
358 spd_cb->phy_cfg.dtcr = (spd->rank == 2) ? 0x730035C7 : 0x710035C7;
359 spd_cb->phy_cfg.pgcr2 = (0xF << 20) | ((int)spd->t_refprd & 0x3ffff);
361 spd_cb->phy_cfg.zq0cr1 = 0x0000005D;
362 spd_cb->phy_cfg.zq1cr1 = 0x0000005B;
363 spd_cb->phy_cfg.zq2cr1 = 0x0000005B;
365 spd_cb->phy_cfg.pir_v1 = 0x00000033;
366 spd_cb->phy_cfg.pir_v2 = 0x0000FF81;
369 spd_cb->emif_cfg.sdcfg = spd->sdram_type << 29 | (DDR_TERM & 7) << 25 |
370 (DYN_ODT & 3) << 22 | (spd->cwl & 0x7) << 14 |
371 (spd->cas & 0xf) << 8 | (spd->ibank & 3) << 5 |
372 (spd->buswidth & 3) << 12 | (spd->pagesize & 3);
375 spd_cb->emif_cfg.sdcfg |= 1 << 3;
377 spd_cb->emif_cfg.sdtim1 = ((spd->t_wr - 1) & 0x1f) << 25 |
378 ((spd->t_ras - 1) & 0x7f) << 18 |
379 ((spd->t_rc - 1) & 0xff) << 10 |
380 (spd->t_rrd2 & 0x3f) << 4 |
381 ((spd->t_wtr - 1) & 0xf);
383 spd_cb->emif_cfg.sdtim2 = 0x07 << 10 | ((spd->t_rp - 1) & 0x1f) << 5 |
384 ((spd->t_rcd - 1) & 0x1f);
386 spd_cb->emif_cfg.sdtim3 = ((spd->t_xp - 2) & 0xf) << 28 |
387 ((spd->t_xs - 1) & 0x3ff) << 18 |
388 ((spd->t_xsdll - 1) & 0x3ff) << 8 |
389 ((spd->t_rtp - 1) & 0xf) << 4 | ((spd->t_cke) & 0xf);
391 spd_cb->emif_cfg.sdtim4 = (spd->t_csta & 0xf) << 28 |
392 ((spd->t_ckesr - 1) & 0xf) << 24 |
393 ((spd->t_zqcs - 1) & 0xff) << 16 |
394 ((spd->t_rfc - 1) & 0x3ff) << 4 |
395 (spd->t_ras_max & 0xf);
397 spd_cb->emif_cfg.sdrfc = (spd->refresh_rate - 1) & 0xffff;
399 /* TODO zqcfg value fixed ,May be required correction for K2E evm. */
400 spd_cb->emif_cfg.zqcfg = (spd->rank == 2) ? 0xF0073200 : 0x70073200;
403 static int ddr3_read_spd(ddr3_spd_eeprom_t *spd_params)
408 i2c_init(CONFIG_SYS_DAVINCI_I2C_SPEED, CONFIG_SYS_DAVINCI_I2C_SLAVE);
410 old_bus = i2c_get_bus_num();
413 ret = i2c_read(0x53, 0, 1, (unsigned char *)spd_params, 256);
415 i2c_set_bus_num(old_bus);
418 printf("Cannot read DIMM params\n");
422 if (ddr3_spd_check(spd_params))
428 int ddr3_get_size(void)
430 ddr3_spd_eeprom_t spd_params;
432 if (ddr3_read_spd(&spd_params))
435 return ddr3_get_size_in_mb(&spd_params) / 1024;
438 int ddr3_get_dimm_params_from_spd(struct ddr3_spd_cb *spd_cb)
440 struct ddr3_sodimm spd;
441 ddr3_spd_eeprom_t spd_params;
443 memset(&spd, 0, sizeof(spd));
445 if (ddr3_read_spd(&spd_params))
448 if (ddrtimingcalculation(&spd_params, &spd, spd_cb)) {
449 printf("Timing caclulation error\n");
453 strncpy(spd_cb->dimm_name, (char *)spd_params.mpart, 18);
454 spd_cb->dimm_name[18] = '\0';
456 init_ddr3param(spd_cb, &spd);
458 dump_emif_config(&spd_cb->emif_cfg);
459 dump_phy_config(&spd_cb->phy_cfg);