1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
13 #include <asm/arch/ddr.h>
14 #include <linux/bitops.h>
15 #include <linux/delay.h>
16 #include <linux/iopoll.h>
17 #include "stm32mp1_ddr.h"
18 #include "stm32mp1_ddr_regs.h"
20 #define RCC_DDRITFCR 0xD8
22 #define RCC_DDRITFCR_DDRCAPBRST (BIT(14))
23 #define RCC_DDRITFCR_DDRCAXIRST (BIT(15))
24 #define RCC_DDRITFCR_DDRCORERST (BIT(16))
25 #define RCC_DDRITFCR_DPHYAPBRST (BIT(17))
26 #define RCC_DDRITFCR_DPHYRST (BIT(18))
27 #define RCC_DDRITFCR_DPHYCTLRST (BIT(19))
31 u16 offset; /* offset for base address */
32 u8 par_offset; /* offset for parameter array */
35 #define INVALID_OFFSET 0xFF
37 #define DDRCTL_REG(x, y) \
39 offsetof(struct stm32mp1_ddrctl, x),\
40 offsetof(struct y, x)}
42 #define DDRPHY_REG(x, y) \
44 offsetof(struct stm32mp1_ddrphy, x),\
45 offsetof(struct y, x)}
47 #define DDR_REG_DYN(x) \
49 offsetof(struct stm32mp1_ddrctl, x),\
52 #define DDRPHY_REG_DYN(x) \
54 offsetof(struct stm32mp1_ddrphy, x),\
57 /***********************************************************
58 * PARAMETERS: value get from device tree :
59 * size / order need to be aligned with binding
60 * modification NOT ALLOWED !!!
61 ***********************************************************/
62 #define DDRCTL_REG_REG_SIZE 25 /* st,ctl-reg */
63 #define DDRCTL_REG_TIMING_SIZE 12 /* st,ctl-timing */
64 #define DDRCTL_REG_MAP_SIZE 9 /* st,ctl-map */
65 #define DDRCTL_REG_PERF_SIZE 17 /* st,ctl-perf */
67 #define DDRPHY_REG_REG_SIZE 11 /* st,phy-reg */
68 #define DDRPHY_REG_TIMING_SIZE 10 /* st,phy-timing */
69 #define DDRPHY_REG_CAL_SIZE 12 /* st,phy-cal */
71 #define DDRCTL_REG_REG(x) DDRCTL_REG(x, stm32mp1_ddrctrl_reg)
72 static const struct reg_desc ddr_reg[DDRCTL_REG_REG_SIZE] = {
74 DDRCTL_REG_REG(mrctrl0),
75 DDRCTL_REG_REG(mrctrl1),
76 DDRCTL_REG_REG(derateen),
77 DDRCTL_REG_REG(derateint),
78 DDRCTL_REG_REG(pwrctl),
79 DDRCTL_REG_REG(pwrtmg),
80 DDRCTL_REG_REG(hwlpctl),
81 DDRCTL_REG_REG(rfshctl0),
82 DDRCTL_REG_REG(rfshctl3),
83 DDRCTL_REG_REG(crcparctl0),
84 DDRCTL_REG_REG(zqctl0),
85 DDRCTL_REG_REG(dfitmg0),
86 DDRCTL_REG_REG(dfitmg1),
87 DDRCTL_REG_REG(dfilpcfg0),
88 DDRCTL_REG_REG(dfiupd0),
89 DDRCTL_REG_REG(dfiupd1),
90 DDRCTL_REG_REG(dfiupd2),
91 DDRCTL_REG_REG(dfiphymstr),
92 DDRCTL_REG_REG(odtmap),
95 DDRCTL_REG_REG(dbgcmd),
96 DDRCTL_REG_REG(poisoncfg),
97 DDRCTL_REG_REG(pccfg),
100 #define DDRCTL_REG_TIMING(x) DDRCTL_REG(x, stm32mp1_ddrctrl_timing)
101 static const struct reg_desc ddr_timing[DDRCTL_REG_TIMING_SIZE] = {
102 DDRCTL_REG_TIMING(rfshtmg),
103 DDRCTL_REG_TIMING(dramtmg0),
104 DDRCTL_REG_TIMING(dramtmg1),
105 DDRCTL_REG_TIMING(dramtmg2),
106 DDRCTL_REG_TIMING(dramtmg3),
107 DDRCTL_REG_TIMING(dramtmg4),
108 DDRCTL_REG_TIMING(dramtmg5),
109 DDRCTL_REG_TIMING(dramtmg6),
110 DDRCTL_REG_TIMING(dramtmg7),
111 DDRCTL_REG_TIMING(dramtmg8),
112 DDRCTL_REG_TIMING(dramtmg14),
113 DDRCTL_REG_TIMING(odtcfg),
116 #define DDRCTL_REG_MAP(x) DDRCTL_REG(x, stm32mp1_ddrctrl_map)
117 static const struct reg_desc ddr_map[DDRCTL_REG_MAP_SIZE] = {
118 DDRCTL_REG_MAP(addrmap1),
119 DDRCTL_REG_MAP(addrmap2),
120 DDRCTL_REG_MAP(addrmap3),
121 DDRCTL_REG_MAP(addrmap4),
122 DDRCTL_REG_MAP(addrmap5),
123 DDRCTL_REG_MAP(addrmap6),
124 DDRCTL_REG_MAP(addrmap9),
125 DDRCTL_REG_MAP(addrmap10),
126 DDRCTL_REG_MAP(addrmap11),
129 #define DDRCTL_REG_PERF(x) DDRCTL_REG(x, stm32mp1_ddrctrl_perf)
130 static const struct reg_desc ddr_perf[DDRCTL_REG_PERF_SIZE] = {
131 DDRCTL_REG_PERF(sched),
132 DDRCTL_REG_PERF(sched1),
133 DDRCTL_REG_PERF(perfhpr1),
134 DDRCTL_REG_PERF(perflpr1),
135 DDRCTL_REG_PERF(perfwr1),
136 DDRCTL_REG_PERF(pcfgr_0),
137 DDRCTL_REG_PERF(pcfgw_0),
138 DDRCTL_REG_PERF(pcfgqos0_0),
139 DDRCTL_REG_PERF(pcfgqos1_0),
140 DDRCTL_REG_PERF(pcfgwqos0_0),
141 DDRCTL_REG_PERF(pcfgwqos1_0),
142 DDRCTL_REG_PERF(pcfgr_1),
143 DDRCTL_REG_PERF(pcfgw_1),
144 DDRCTL_REG_PERF(pcfgqos0_1),
145 DDRCTL_REG_PERF(pcfgqos1_1),
146 DDRCTL_REG_PERF(pcfgwqos0_1),
147 DDRCTL_REG_PERF(pcfgwqos1_1),
150 #define DDRPHY_REG_REG(x) DDRPHY_REG(x, stm32mp1_ddrphy_reg)
151 static const struct reg_desc ddrphy_reg[DDRPHY_REG_REG_SIZE] = {
152 DDRPHY_REG_REG(pgcr),
153 DDRPHY_REG_REG(aciocr),
154 DDRPHY_REG_REG(dxccr),
155 DDRPHY_REG_REG(dsgcr),
157 DDRPHY_REG_REG(odtcr),
158 DDRPHY_REG_REG(zq0cr1),
159 DDRPHY_REG_REG(dx0gcr),
160 DDRPHY_REG_REG(dx1gcr),
161 DDRPHY_REG_REG(dx2gcr),
162 DDRPHY_REG_REG(dx3gcr),
165 #define DDRPHY_REG_TIMING(x) DDRPHY_REG(x, stm32mp1_ddrphy_timing)
166 static const struct reg_desc ddrphy_timing[DDRPHY_REG_TIMING_SIZE] = {
167 DDRPHY_REG_TIMING(ptr0),
168 DDRPHY_REG_TIMING(ptr1),
169 DDRPHY_REG_TIMING(ptr2),
170 DDRPHY_REG_TIMING(dtpr0),
171 DDRPHY_REG_TIMING(dtpr1),
172 DDRPHY_REG_TIMING(dtpr2),
173 DDRPHY_REG_TIMING(mr0),
174 DDRPHY_REG_TIMING(mr1),
175 DDRPHY_REG_TIMING(mr2),
176 DDRPHY_REG_TIMING(mr3),
179 #define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
180 static const struct reg_desc ddrphy_cal[DDRPHY_REG_CAL_SIZE] = {
181 DDRPHY_REG_CAL(dx0dllcr),
182 DDRPHY_REG_CAL(dx0dqtr),
183 DDRPHY_REG_CAL(dx0dqstr),
184 DDRPHY_REG_CAL(dx1dllcr),
185 DDRPHY_REG_CAL(dx1dqtr),
186 DDRPHY_REG_CAL(dx1dqstr),
187 DDRPHY_REG_CAL(dx2dllcr),
188 DDRPHY_REG_CAL(dx2dqtr),
189 DDRPHY_REG_CAL(dx2dqstr),
190 DDRPHY_REG_CAL(dx3dllcr),
191 DDRPHY_REG_CAL(dx3dqtr),
192 DDRPHY_REG_CAL(dx3dqstr),
195 /**************************************************************
196 * DYNAMIC REGISTERS: only used for debug purpose (read/modify)
197 **************************************************************/
198 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
199 static const struct reg_desc ddr_dyn[] = {
202 DDR_REG_DYN(dfimisc),
203 DDR_REG_DYN(dfistat),
206 DDR_REG_DYN(pctrl_0),
207 DDR_REG_DYN(pctrl_1),
210 #define DDR_REG_DYN_SIZE ARRAY_SIZE(ddr_dyn)
212 static const struct reg_desc ddrphy_dyn[] = {
214 DDRPHY_REG_DYN(pgsr),
215 DDRPHY_REG_DYN(zq0sr0),
216 DDRPHY_REG_DYN(zq0sr1),
217 DDRPHY_REG_DYN(dx0gsr0),
218 DDRPHY_REG_DYN(dx0gsr1),
219 DDRPHY_REG_DYN(dx1gsr0),
220 DDRPHY_REG_DYN(dx1gsr1),
221 DDRPHY_REG_DYN(dx2gsr0),
222 DDRPHY_REG_DYN(dx2gsr1),
223 DDRPHY_REG_DYN(dx3gsr0),
224 DDRPHY_REG_DYN(dx3gsr1),
227 #define DDRPHY_REG_DYN_SIZE ARRAY_SIZE(ddrphy_dyn)
231 /*****************************************************************
232 * REGISTERS ARRAY: used to parse device tree and interactive mode
233 *****************************************************************/
242 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
243 /* dynamic registers => managed in driver or not changed,
244 * can be dumped in interactive mode
258 struct ddr_reg_info {
260 const struct reg_desc *desc;
265 #define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
267 const struct ddr_reg_info ddr_registers[REG_TYPE_NB] = {
269 "static", ddr_reg, DDRCTL_REG_REG_SIZE, DDR_BASE},
271 "timing", ddr_timing, DDRCTL_REG_TIMING_SIZE, DDR_BASE},
273 "perf", ddr_perf, DDRCTL_REG_PERF_SIZE, DDR_BASE},
275 "map", ddr_map, DDRCTL_REG_MAP_SIZE, DDR_BASE},
277 "static", ddrphy_reg, DDRPHY_REG_REG_SIZE, DDRPHY_BASE},
279 "timing", ddrphy_timing, DDRPHY_REG_TIMING_SIZE, DDRPHY_BASE},
281 "cal", ddrphy_cal, DDRPHY_REG_CAL_SIZE, DDRPHY_BASE},
282 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
284 "dyn", ddr_dyn, DDR_REG_DYN_SIZE, DDR_BASE},
286 "dyn", ddrphy_dyn, DDRPHY_REG_DYN_SIZE, DDRPHY_BASE},
291 const char *base_name[] = {
293 [DDRPHY_BASE] = "phy",
296 static u32 get_base_addr(const struct ddr_info *priv, enum base_type base)
298 if (base == DDRPHY_BASE)
299 return (u32)priv->phy;
301 return (u32)priv->ctl;
304 static void set_reg(const struct ddr_info *priv,
309 unsigned int *ptr, value;
310 enum base_type base = ddr_registers[type].base;
311 u32 base_addr = get_base_addr(priv, base);
312 const struct reg_desc *desc = ddr_registers[type].desc;
314 debug("init %s\n", ddr_registers[type].name);
315 for (i = 0; i < ddr_registers[type].size; i++) {
316 ptr = (unsigned int *)(base_addr + desc[i].offset);
317 if (desc[i].par_offset == INVALID_OFFSET) {
318 pr_err("invalid parameter offset for %s", desc[i].name);
320 value = *((u32 *)((u32)param +
321 desc[i].par_offset));
323 debug("[0x%x] %s= 0x%08x\n",
324 (u32)ptr, desc[i].name, value);
329 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
330 static void stm32mp1_dump_reg_desc(u32 base_addr, const struct reg_desc *desc)
334 ptr = (unsigned int *)(base_addr + desc->offset);
335 printf("%s= 0x%08x\n", desc->name, readl(ptr));
338 static void stm32mp1_dump_param_desc(u32 par_addr, const struct reg_desc *desc)
342 ptr = (unsigned int *)(par_addr + desc->par_offset);
343 printf("%s= 0x%08x\n", desc->name, readl(ptr));
346 static const struct reg_desc *found_reg(const char *name, enum reg_type *type)
349 const struct reg_desc *desc;
351 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
352 desc = ddr_registers[i].desc;
353 for (j = 0; j < ddr_registers[i].size; j++) {
354 if (strcmp(name, desc[j].name) == 0) {
364 int stm32mp1_dump_reg(const struct ddr_info *priv,
368 const struct reg_desc *desc;
370 enum base_type p_base;
373 enum base_type filter = NONE_BASE;
377 if (strcmp(name, base_name[DDR_BASE]) == 0)
379 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
380 filter = DDRPHY_BASE;
383 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
384 p_base = ddr_registers[i].base;
385 p_name = ddr_registers[i].name;
386 if (!name || (filter == p_base || !strcmp(name, p_name))) {
388 desc = ddr_registers[i].desc;
389 base_addr = get_base_addr(priv, p_base);
390 printf("==%s.%s==\n", base_name[p_base], p_name);
391 for (j = 0; j < ddr_registers[i].size; j++)
392 stm32mp1_dump_reg_desc(base_addr, &desc[j]);
396 desc = found_reg(name, &type);
398 p_base = ddr_registers[type].base;
399 base_addr = get_base_addr(priv, p_base);
400 stm32mp1_dump_reg_desc(base_addr, desc);
407 void stm32mp1_edit_reg(const struct ddr_info *priv,
408 char *name, char *string)
410 unsigned long *ptr, value;
413 const struct reg_desc *desc;
416 desc = found_reg(name, &type);
419 printf("%s not found\n", name);
422 if (strict_strtoul(string, 16, &value) < 0) {
423 printf("invalid value %s\n", string);
426 base = ddr_registers[type].base;
427 base_addr = get_base_addr(priv, base);
428 ptr = (unsigned long *)(base_addr + desc->offset);
430 printf("%s= 0x%08x\n", desc->name, readl(ptr));
433 static u32 get_par_addr(const struct stm32mp1_ddr_config *config,
440 par_addr = (u32)&config->c_reg;
443 par_addr = (u32)&config->c_timing;
446 par_addr = (u32)&config->c_perf;
449 par_addr = (u32)&config->c_map;
452 par_addr = (u32)&config->p_reg;
455 par_addr = (u32)&config->p_timing;
458 par_addr = (u32)&config->p_cal;
463 par_addr = (u32)NULL;
470 int stm32mp1_dump_param(const struct stm32mp1_ddr_config *config,
474 const struct reg_desc *desc;
476 enum base_type p_base;
479 enum base_type filter = NONE_BASE;
480 int result = -EINVAL;
483 if (strcmp(name, base_name[DDR_BASE]) == 0)
485 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
486 filter = DDRPHY_BASE;
489 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
490 par_addr = get_par_addr(config, i);
493 p_base = ddr_registers[i].base;
494 p_name = ddr_registers[i].name;
495 if (!name || (filter == p_base || !strcmp(name, p_name))) {
497 desc = ddr_registers[i].desc;
498 printf("==%s.%s==\n", base_name[p_base], p_name);
499 for (j = 0; j < ddr_registers[i].size; j++)
500 stm32mp1_dump_param_desc(par_addr, &desc[j]);
504 desc = found_reg(name, &type);
506 par_addr = get_par_addr(config, type);
508 stm32mp1_dump_param_desc(par_addr, desc);
516 void stm32mp1_edit_param(const struct stm32mp1_ddr_config *config,
517 char *name, char *string)
519 unsigned long *ptr, value;
521 const struct reg_desc *desc;
524 desc = found_reg(name, &type);
526 printf("%s not found\n", name);
529 if (strict_strtoul(string, 16, &value) < 0) {
530 printf("invalid value %s\n", string);
533 par_addr = get_par_addr(config, type);
535 printf("no parameter %s\n", name);
538 ptr = (unsigned long *)(par_addr + desc->par_offset);
540 printf("%s= 0x%08x\n", desc->name, readl(ptr));
544 __weak bool stm32mp1_ddr_interactive(void *priv,
545 enum stm32mp1_ddr_interact_step step,
546 const struct stm32mp1_ddr_config *config)
551 #define INTERACTIVE(step)\
552 stm32mp1_ddr_interactive(priv, step, config)
554 static void ddrphy_idone_wait(struct stm32mp1_ddrphy *phy)
559 ret = readl_poll_timeout(&phy->pgsr, pgsr,
560 pgsr & (DDRPHYC_PGSR_IDONE |
562 DDRPHYC_PGSR_DTIERR |
563 DDRPHYC_PGSR_DFTERR |
565 DDRPHYC_PGSR_RVEIRR),
567 debug("\n[0x%08x] pgsr = 0x%08x ret=%d\n",
568 (u32)&phy->pgsr, pgsr, ret);
571 void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
573 pir |= DDRPHYC_PIR_INIT;
574 writel(pir, &phy->pir);
575 debug("[0x%08x] pir = 0x%08x -> 0x%08x\n",
576 (u32)&phy->pir, pir, readl(&phy->pir));
578 /* need to wait 10 configuration clock before start polling */
581 /* Wait DRAM initialization and Gate Training Evaluation complete */
582 ddrphy_idone_wait(phy);
585 /* start quasi dynamic register update */
586 static void start_sw_done(struct stm32mp1_ddrctl *ctl)
588 clrbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
591 /* wait quasi dynamic register update */
592 static void wait_sw_done_ack(struct stm32mp1_ddrctl *ctl)
597 setbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
599 ret = readl_poll_timeout(&ctl->swstat, swstat,
600 swstat & DDRCTRL_SWSTAT_SW_DONE_ACK,
603 panic("Timeout initialising DRAM : DDR->swstat = %x\n",
606 debug("[0x%08x] swstat = 0x%08x\n", (u32)&ctl->swstat, swstat);
609 /* wait quasi dynamic register update */
610 static void wait_operating_mode(struct ddr_info *priv, int mode)
612 u32 stat, val, mask, val2 = 0, mask2 = 0;
615 mask = DDRCTRL_STAT_OPERATING_MODE_MASK;
617 /* self-refresh due to software => check also STAT.selfref_type */
618 if (mode == DDRCTRL_STAT_OPERATING_MODE_SR) {
619 mask |= DDRCTRL_STAT_SELFREF_TYPE_MASK;
620 val |= DDRCTRL_STAT_SELFREF_TYPE_SR;
621 } else if (mode == DDRCTRL_STAT_OPERATING_MODE_NORMAL) {
622 /* normal mode: handle also automatic self refresh */
623 mask2 = DDRCTRL_STAT_OPERATING_MODE_MASK |
624 DDRCTRL_STAT_SELFREF_TYPE_MASK;
625 val2 = DDRCTRL_STAT_OPERATING_MODE_SR |
626 DDRCTRL_STAT_SELFREF_TYPE_ASR;
629 ret = readl_poll_timeout(&priv->ctl->stat, stat,
630 ((stat & mask) == val) ||
631 (mask2 && ((stat & mask2) == val2)),
635 panic("Timeout DRAM : DDR->stat = %x\n", stat);
637 debug("[0x%08x] stat = 0x%08x\n", (u32)&priv->ctl->stat, stat);
640 void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
643 /* quasi-dynamic register update*/
644 setbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
645 clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN |
646 DDRCTRL_PWRCTL_SELFREF_EN);
647 clrbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
648 wait_sw_done_ack(ctl);
651 void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
652 u32 rfshctl3, u32 pwrctl)
655 if (!(rfshctl3 & DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH))
656 clrbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
657 if (pwrctl & DDRCTRL_PWRCTL_POWERDOWN_EN)
658 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
659 if ((pwrctl & DDRCTRL_PWRCTL_SELFREF_EN))
660 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_SELFREF_EN);
661 setbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
662 wait_sw_done_ack(ctl);
665 /* board-specific DDR power initializations. */
666 __weak int board_ddr_power_init(enum ddr_type ddr_type)
672 void stm32mp1_ddr_init(struct ddr_info *priv,
673 const struct stm32mp1_ddr_config *config)
679 switch (config->c_reg.mstr & DDRCTRL_MSTR_DATA_BUS_WIDTH_MASK) {
680 case DDRCTRL_MSTR_DATA_BUS_WIDTH_QUARTER:
683 case DDRCTRL_MSTR_DATA_BUS_WIDTH_HALF:
692 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
693 ret = board_ddr_power_init(STM32MP_DDR3);
694 else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR2) {
696 ret = board_ddr_power_init(STM32MP_LPDDR2_32);
698 ret = board_ddr_power_init(STM32MP_LPDDR2_16);
699 } else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR3) {
701 ret = board_ddr_power_init(STM32MP_LPDDR3_32);
703 ret = board_ddr_power_init(STM32MP_LPDDR3_16);
706 panic("ddr power init failed\n");
709 debug("name = %s\n", config->info.name);
710 debug("speed = %d kHz\n", config->info.speed);
711 debug("size = 0x%x\n", config->info.size);
713 * 1. Program the DWC_ddr_umctl2 registers
714 * 1.1 RESETS: presetn, core_ddrc_rstn, aresetn
716 /* Assert All DDR part */
717 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
718 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
719 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
720 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
721 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
722 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
724 /* 1.2. start CLOCK */
725 if (stm32mp1_ddr_clk_enable(priv, config->info.speed))
726 panic("invalid DRAM clock : %d kHz\n",
729 /* 1.3. deassert reset */
730 /* de-assert PHY rstn and ctl_rstn via DPHYRST and DPHYCTLRST */
731 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
732 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
733 /* De-assert presetn once the clocks are active
734 * and stable via DDRCAPBRST bit
736 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
738 /* 1.4. wait 128 cycles to permit initialization of end logic */
740 /* for PCLK = 133MHz => 1 us is enough, 2 to allow lower frequency */
742 if (INTERACTIVE(STEP_DDR_RESET))
745 /* 1.5. initialize registers ddr_umctl2 */
746 /* Stop uMCTL2 before PHY is ready */
747 clrbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
748 debug("[0x%08x] dfimisc = 0x%08x\n",
749 (u32)&priv->ctl->dfimisc, readl(&priv->ctl->dfimisc));
751 set_reg(priv, REG_REG, &config->c_reg);
752 set_reg(priv, REG_TIMING, &config->c_timing);
753 set_reg(priv, REG_MAP, &config->c_map);
755 /* skip CTRL init, SDRAM init is done by PHY PUBL */
756 clrsetbits_le32(&priv->ctl->init0,
757 DDRCTRL_INIT0_SKIP_DRAM_INIT_MASK,
758 DDRCTRL_INIT0_SKIP_DRAM_INIT_NORMAL);
760 set_reg(priv, REG_PERF, &config->c_perf);
762 if (INTERACTIVE(STEP_CTL_INIT))
765 /* 2. deassert reset signal core_ddrc_rstn, aresetn and presetn */
766 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
767 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
768 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
770 /* 3. start PHY init by accessing relevant PUBL registers
771 * (DXGCR, DCR, PTR*, MR*, DTPR*)
773 set_reg(priv, REGPHY_REG, &config->p_reg);
774 set_reg(priv, REGPHY_TIMING, &config->p_timing);
775 if (config->p_cal_present)
776 set_reg(priv, REGPHY_CAL, &config->p_cal);
778 if (INTERACTIVE(STEP_PHY_INIT))
781 /* 4. Monitor PHY init status by polling PUBL register PGSR.IDONE
782 * Perform DDR PHY DRAM initialization and Gate Training Evaluation
784 ddrphy_idone_wait(priv->phy);
786 /* 5. Indicate to PUBL that controller performs SDRAM initialization
787 * by setting PIR.INIT and PIR CTLDINIT and pool PGSR.IDONE
788 * DRAM init is done by PHY, init0.skip_dram.init = 1
790 pir = DDRPHYC_PIR_DLLSRST | DDRPHYC_PIR_DLLLOCK | DDRPHYC_PIR_ZCAL |
791 DDRPHYC_PIR_ITMSRST | DDRPHYC_PIR_DRAMINIT | DDRPHYC_PIR_ICPC;
793 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
794 pir |= DDRPHYC_PIR_DRAMRST; /* only for DDR3 */
796 stm32mp1_ddrphy_init(priv->phy, pir);
798 /* 6. SET DFIMISC.dfi_init_complete_en to 1 */
799 /* Enable quasi-dynamic register programming*/
800 start_sw_done(priv->ctl);
801 setbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
802 wait_sw_done_ack(priv->ctl);
804 /* 7. Wait for DWC_ddr_umctl2 to move to normal operation mode
805 * by monitoring STAT.operating_mode signal
807 /* wait uMCTL2 ready */
809 wait_operating_mode(priv, DDRCTRL_STAT_OPERATING_MODE_NORMAL);
811 if (config->p_cal_present) {
812 debug("DDR DQS training skipped.\n");
814 debug("DDR DQS training : ");
815 /* 8. Disable Auto refresh and power down by setting
816 * - RFSHCTL3.dis_au_refresh = 1
817 * - PWRCTL.powerdown_en = 0
818 * - DFIMISC.dfiinit_complete_en = 0
820 stm32mp1_refresh_disable(priv->ctl);
822 /* 9. Program PUBL PGCR to enable refresh during training and rank to train
823 * not done => keep the programed value in PGCR
826 /* 10. configure PUBL PIR register to specify which training step to run */
827 /* warning : RVTRN is not supported by this PUBL */
828 stm32mp1_ddrphy_init(priv->phy, DDRPHYC_PIR_QSTRN);
830 /* 11. monitor PUB PGSR.IDONE to poll cpmpletion of training sequence */
831 ddrphy_idone_wait(priv->phy);
833 /* 12. set back registers in step 8 to the orginal values if desidered */
834 stm32mp1_refresh_restore(priv->ctl, config->c_reg.rfshctl3,
835 config->c_reg.pwrctl);
836 } /* if (config->p_cal_present) */
838 /* enable uMCTL2 AXI port 0 and 1 */
839 setbits_le32(&priv->ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
840 setbits_le32(&priv->ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
842 if (INTERACTIVE(STEP_DDR_READY))