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/iopoll.h>
15 #include "stm32mp1_ddr.h"
16 #include "stm32mp1_ddr_regs.h"
18 #define RCC_DDRITFCR 0xD8
20 #define RCC_DDRITFCR_DDRCAPBRST (BIT(14))
21 #define RCC_DDRITFCR_DDRCAXIRST (BIT(15))
22 #define RCC_DDRITFCR_DDRCORERST (BIT(16))
23 #define RCC_DDRITFCR_DPHYAPBRST (BIT(17))
24 #define RCC_DDRITFCR_DPHYRST (BIT(18))
25 #define RCC_DDRITFCR_DPHYCTLRST (BIT(19))
29 u16 offset; /* offset for base address */
30 u8 par_offset; /* offset for parameter array */
33 #define INVALID_OFFSET 0xFF
35 #define DDRCTL_REG(x, y) \
37 offsetof(struct stm32mp1_ddrctl, x),\
38 offsetof(struct y, x)}
40 #define DDRPHY_REG(x, y) \
42 offsetof(struct stm32mp1_ddrphy, x),\
43 offsetof(struct y, x)}
45 #define DDR_REG_DYN(x) \
47 offsetof(struct stm32mp1_ddrctl, x),\
50 #define DDRPHY_REG_DYN(x) \
52 offsetof(struct stm32mp1_ddrphy, x),\
55 /***********************************************************
56 * PARAMETERS: value get from device tree :
57 * size / order need to be aligned with binding
58 * modification NOT ALLOWED !!!
59 ***********************************************************/
60 #define DDRCTL_REG_REG_SIZE 25 /* st,ctl-reg */
61 #define DDRCTL_REG_TIMING_SIZE 12 /* st,ctl-timing */
62 #define DDRCTL_REG_MAP_SIZE 9 /* st,ctl-map */
63 #define DDRCTL_REG_PERF_SIZE 17 /* st,ctl-perf */
65 #define DDRPHY_REG_REG_SIZE 11 /* st,phy-reg */
66 #define DDRPHY_REG_TIMING_SIZE 10 /* st,phy-timing */
67 #define DDRPHY_REG_CAL_SIZE 12 /* st,phy-cal */
69 #define DDRCTL_REG_REG(x) DDRCTL_REG(x, stm32mp1_ddrctrl_reg)
70 static const struct reg_desc ddr_reg[DDRCTL_REG_REG_SIZE] = {
72 DDRCTL_REG_REG(mrctrl0),
73 DDRCTL_REG_REG(mrctrl1),
74 DDRCTL_REG_REG(derateen),
75 DDRCTL_REG_REG(derateint),
76 DDRCTL_REG_REG(pwrctl),
77 DDRCTL_REG_REG(pwrtmg),
78 DDRCTL_REG_REG(hwlpctl),
79 DDRCTL_REG_REG(rfshctl0),
80 DDRCTL_REG_REG(rfshctl3),
81 DDRCTL_REG_REG(crcparctl0),
82 DDRCTL_REG_REG(zqctl0),
83 DDRCTL_REG_REG(dfitmg0),
84 DDRCTL_REG_REG(dfitmg1),
85 DDRCTL_REG_REG(dfilpcfg0),
86 DDRCTL_REG_REG(dfiupd0),
87 DDRCTL_REG_REG(dfiupd1),
88 DDRCTL_REG_REG(dfiupd2),
89 DDRCTL_REG_REG(dfiphymstr),
90 DDRCTL_REG_REG(odtmap),
93 DDRCTL_REG_REG(dbgcmd),
94 DDRCTL_REG_REG(poisoncfg),
95 DDRCTL_REG_REG(pccfg),
98 #define DDRCTL_REG_TIMING(x) DDRCTL_REG(x, stm32mp1_ddrctrl_timing)
99 static const struct reg_desc ddr_timing[DDRCTL_REG_TIMING_SIZE] = {
100 DDRCTL_REG_TIMING(rfshtmg),
101 DDRCTL_REG_TIMING(dramtmg0),
102 DDRCTL_REG_TIMING(dramtmg1),
103 DDRCTL_REG_TIMING(dramtmg2),
104 DDRCTL_REG_TIMING(dramtmg3),
105 DDRCTL_REG_TIMING(dramtmg4),
106 DDRCTL_REG_TIMING(dramtmg5),
107 DDRCTL_REG_TIMING(dramtmg6),
108 DDRCTL_REG_TIMING(dramtmg7),
109 DDRCTL_REG_TIMING(dramtmg8),
110 DDRCTL_REG_TIMING(dramtmg14),
111 DDRCTL_REG_TIMING(odtcfg),
114 #define DDRCTL_REG_MAP(x) DDRCTL_REG(x, stm32mp1_ddrctrl_map)
115 static const struct reg_desc ddr_map[DDRCTL_REG_MAP_SIZE] = {
116 DDRCTL_REG_MAP(addrmap1),
117 DDRCTL_REG_MAP(addrmap2),
118 DDRCTL_REG_MAP(addrmap3),
119 DDRCTL_REG_MAP(addrmap4),
120 DDRCTL_REG_MAP(addrmap5),
121 DDRCTL_REG_MAP(addrmap6),
122 DDRCTL_REG_MAP(addrmap9),
123 DDRCTL_REG_MAP(addrmap10),
124 DDRCTL_REG_MAP(addrmap11),
127 #define DDRCTL_REG_PERF(x) DDRCTL_REG(x, stm32mp1_ddrctrl_perf)
128 static const struct reg_desc ddr_perf[DDRCTL_REG_PERF_SIZE] = {
129 DDRCTL_REG_PERF(sched),
130 DDRCTL_REG_PERF(sched1),
131 DDRCTL_REG_PERF(perfhpr1),
132 DDRCTL_REG_PERF(perflpr1),
133 DDRCTL_REG_PERF(perfwr1),
134 DDRCTL_REG_PERF(pcfgr_0),
135 DDRCTL_REG_PERF(pcfgw_0),
136 DDRCTL_REG_PERF(pcfgqos0_0),
137 DDRCTL_REG_PERF(pcfgqos1_0),
138 DDRCTL_REG_PERF(pcfgwqos0_0),
139 DDRCTL_REG_PERF(pcfgwqos1_0),
140 DDRCTL_REG_PERF(pcfgr_1),
141 DDRCTL_REG_PERF(pcfgw_1),
142 DDRCTL_REG_PERF(pcfgqos0_1),
143 DDRCTL_REG_PERF(pcfgqos1_1),
144 DDRCTL_REG_PERF(pcfgwqos0_1),
145 DDRCTL_REG_PERF(pcfgwqos1_1),
148 #define DDRPHY_REG_REG(x) DDRPHY_REG(x, stm32mp1_ddrphy_reg)
149 static const struct reg_desc ddrphy_reg[DDRPHY_REG_REG_SIZE] = {
150 DDRPHY_REG_REG(pgcr),
151 DDRPHY_REG_REG(aciocr),
152 DDRPHY_REG_REG(dxccr),
153 DDRPHY_REG_REG(dsgcr),
155 DDRPHY_REG_REG(odtcr),
156 DDRPHY_REG_REG(zq0cr1),
157 DDRPHY_REG_REG(dx0gcr),
158 DDRPHY_REG_REG(dx1gcr),
159 DDRPHY_REG_REG(dx2gcr),
160 DDRPHY_REG_REG(dx3gcr),
163 #define DDRPHY_REG_TIMING(x) DDRPHY_REG(x, stm32mp1_ddrphy_timing)
164 static const struct reg_desc ddrphy_timing[DDRPHY_REG_TIMING_SIZE] = {
165 DDRPHY_REG_TIMING(ptr0),
166 DDRPHY_REG_TIMING(ptr1),
167 DDRPHY_REG_TIMING(ptr2),
168 DDRPHY_REG_TIMING(dtpr0),
169 DDRPHY_REG_TIMING(dtpr1),
170 DDRPHY_REG_TIMING(dtpr2),
171 DDRPHY_REG_TIMING(mr0),
172 DDRPHY_REG_TIMING(mr1),
173 DDRPHY_REG_TIMING(mr2),
174 DDRPHY_REG_TIMING(mr3),
177 #define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
178 static const struct reg_desc ddrphy_cal[DDRPHY_REG_CAL_SIZE] = {
179 DDRPHY_REG_CAL(dx0dllcr),
180 DDRPHY_REG_CAL(dx0dqtr),
181 DDRPHY_REG_CAL(dx0dqstr),
182 DDRPHY_REG_CAL(dx1dllcr),
183 DDRPHY_REG_CAL(dx1dqtr),
184 DDRPHY_REG_CAL(dx1dqstr),
185 DDRPHY_REG_CAL(dx2dllcr),
186 DDRPHY_REG_CAL(dx2dqtr),
187 DDRPHY_REG_CAL(dx2dqstr),
188 DDRPHY_REG_CAL(dx3dllcr),
189 DDRPHY_REG_CAL(dx3dqtr),
190 DDRPHY_REG_CAL(dx3dqstr),
193 /**************************************************************
194 * DYNAMIC REGISTERS: only used for debug purpose (read/modify)
195 **************************************************************/
196 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
197 static const struct reg_desc ddr_dyn[] = {
200 DDR_REG_DYN(dfimisc),
201 DDR_REG_DYN(dfistat),
204 DDR_REG_DYN(pctrl_0),
205 DDR_REG_DYN(pctrl_1),
208 #define DDR_REG_DYN_SIZE ARRAY_SIZE(ddr_dyn)
210 static const struct reg_desc ddrphy_dyn[] = {
212 DDRPHY_REG_DYN(pgsr),
213 DDRPHY_REG_DYN(zq0sr0),
214 DDRPHY_REG_DYN(zq0sr1),
215 DDRPHY_REG_DYN(dx0gsr0),
216 DDRPHY_REG_DYN(dx0gsr1),
217 DDRPHY_REG_DYN(dx1gsr0),
218 DDRPHY_REG_DYN(dx1gsr1),
219 DDRPHY_REG_DYN(dx2gsr0),
220 DDRPHY_REG_DYN(dx2gsr1),
221 DDRPHY_REG_DYN(dx3gsr0),
222 DDRPHY_REG_DYN(dx3gsr1),
225 #define DDRPHY_REG_DYN_SIZE ARRAY_SIZE(ddrphy_dyn)
229 /*****************************************************************
230 * REGISTERS ARRAY: used to parse device tree and interactive mode
231 *****************************************************************/
240 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
241 /* dynamic registers => managed in driver or not changed,
242 * can be dumped in interactive mode
256 struct ddr_reg_info {
258 const struct reg_desc *desc;
263 #define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
265 const struct ddr_reg_info ddr_registers[REG_TYPE_NB] = {
267 "static", ddr_reg, DDRCTL_REG_REG_SIZE, DDR_BASE},
269 "timing", ddr_timing, DDRCTL_REG_TIMING_SIZE, DDR_BASE},
271 "perf", ddr_perf, DDRCTL_REG_PERF_SIZE, DDR_BASE},
273 "map", ddr_map, DDRCTL_REG_MAP_SIZE, DDR_BASE},
275 "static", ddrphy_reg, DDRPHY_REG_REG_SIZE, DDRPHY_BASE},
277 "timing", ddrphy_timing, DDRPHY_REG_TIMING_SIZE, DDRPHY_BASE},
279 "cal", ddrphy_cal, DDRPHY_REG_CAL_SIZE, DDRPHY_BASE},
280 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
282 "dyn", ddr_dyn, DDR_REG_DYN_SIZE, DDR_BASE},
284 "dyn", ddrphy_dyn, DDRPHY_REG_DYN_SIZE, DDRPHY_BASE},
289 const char *base_name[] = {
291 [DDRPHY_BASE] = "phy",
294 static u32 get_base_addr(const struct ddr_info *priv, enum base_type base)
296 if (base == DDRPHY_BASE)
297 return (u32)priv->phy;
299 return (u32)priv->ctl;
302 static void set_reg(const struct ddr_info *priv,
307 unsigned int *ptr, value;
308 enum base_type base = ddr_registers[type].base;
309 u32 base_addr = get_base_addr(priv, base);
310 const struct reg_desc *desc = ddr_registers[type].desc;
312 debug("init %s\n", ddr_registers[type].name);
313 for (i = 0; i < ddr_registers[type].size; i++) {
314 ptr = (unsigned int *)(base_addr + desc[i].offset);
315 if (desc[i].par_offset == INVALID_OFFSET) {
316 pr_err("invalid parameter offset for %s", desc[i].name);
318 value = *((u32 *)((u32)param +
319 desc[i].par_offset));
321 debug("[0x%x] %s= 0x%08x\n",
322 (u32)ptr, desc[i].name, value);
327 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
328 static void stm32mp1_dump_reg_desc(u32 base_addr, const struct reg_desc *desc)
332 ptr = (unsigned int *)(base_addr + desc->offset);
333 printf("%s= 0x%08x\n", desc->name, readl(ptr));
336 static void stm32mp1_dump_param_desc(u32 par_addr, const struct reg_desc *desc)
340 ptr = (unsigned int *)(par_addr + desc->par_offset);
341 printf("%s= 0x%08x\n", desc->name, readl(ptr));
344 static const struct reg_desc *found_reg(const char *name, enum reg_type *type)
347 const struct reg_desc *desc;
349 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
350 desc = ddr_registers[i].desc;
351 for (j = 0; j < ddr_registers[i].size; j++) {
352 if (strcmp(name, desc[j].name) == 0) {
362 int stm32mp1_dump_reg(const struct ddr_info *priv,
366 const struct reg_desc *desc;
368 enum base_type p_base;
371 enum base_type filter = NONE_BASE;
375 if (strcmp(name, base_name[DDR_BASE]) == 0)
377 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
378 filter = DDRPHY_BASE;
381 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
382 p_base = ddr_registers[i].base;
383 p_name = ddr_registers[i].name;
384 if (!name || (filter == p_base || !strcmp(name, p_name))) {
386 desc = ddr_registers[i].desc;
387 base_addr = get_base_addr(priv, p_base);
388 printf("==%s.%s==\n", base_name[p_base], p_name);
389 for (j = 0; j < ddr_registers[i].size; j++)
390 stm32mp1_dump_reg_desc(base_addr, &desc[j]);
394 desc = found_reg(name, &type);
396 p_base = ddr_registers[type].base;
397 base_addr = get_base_addr(priv, p_base);
398 stm32mp1_dump_reg_desc(base_addr, desc);
405 void stm32mp1_edit_reg(const struct ddr_info *priv,
406 char *name, char *string)
408 unsigned long *ptr, value;
411 const struct reg_desc *desc;
414 desc = found_reg(name, &type);
417 printf("%s not found\n", name);
420 if (strict_strtoul(string, 16, &value) < 0) {
421 printf("invalid value %s\n", string);
424 base = ddr_registers[type].base;
425 base_addr = get_base_addr(priv, base);
426 ptr = (unsigned long *)(base_addr + desc->offset);
428 printf("%s= 0x%08x\n", desc->name, readl(ptr));
431 static u32 get_par_addr(const struct stm32mp1_ddr_config *config,
438 par_addr = (u32)&config->c_reg;
441 par_addr = (u32)&config->c_timing;
444 par_addr = (u32)&config->c_perf;
447 par_addr = (u32)&config->c_map;
450 par_addr = (u32)&config->p_reg;
453 par_addr = (u32)&config->p_timing;
456 par_addr = (u32)&config->p_cal;
461 par_addr = (u32)NULL;
468 int stm32mp1_dump_param(const struct stm32mp1_ddr_config *config,
472 const struct reg_desc *desc;
474 enum base_type p_base;
477 enum base_type filter = NONE_BASE;
478 int result = -EINVAL;
481 if (strcmp(name, base_name[DDR_BASE]) == 0)
483 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
484 filter = DDRPHY_BASE;
487 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
488 par_addr = get_par_addr(config, i);
491 p_base = ddr_registers[i].base;
492 p_name = ddr_registers[i].name;
493 if (!name || (filter == p_base || !strcmp(name, p_name))) {
495 desc = ddr_registers[i].desc;
496 printf("==%s.%s==\n", base_name[p_base], p_name);
497 for (j = 0; j < ddr_registers[i].size; j++)
498 stm32mp1_dump_param_desc(par_addr, &desc[j]);
502 desc = found_reg(name, &type);
504 par_addr = get_par_addr(config, type);
506 stm32mp1_dump_param_desc(par_addr, desc);
514 void stm32mp1_edit_param(const struct stm32mp1_ddr_config *config,
515 char *name, char *string)
517 unsigned long *ptr, value;
519 const struct reg_desc *desc;
522 desc = found_reg(name, &type);
524 printf("%s not found\n", name);
527 if (strict_strtoul(string, 16, &value) < 0) {
528 printf("invalid value %s\n", string);
531 par_addr = get_par_addr(config, type);
533 printf("no parameter %s\n", name);
536 ptr = (unsigned long *)(par_addr + desc->par_offset);
538 printf("%s= 0x%08x\n", desc->name, readl(ptr));
542 __weak bool stm32mp1_ddr_interactive(void *priv,
543 enum stm32mp1_ddr_interact_step step,
544 const struct stm32mp1_ddr_config *config)
549 #define INTERACTIVE(step)\
550 stm32mp1_ddr_interactive(priv, step, config)
552 static void ddrphy_idone_wait(struct stm32mp1_ddrphy *phy)
557 ret = readl_poll_timeout(&phy->pgsr, pgsr,
558 pgsr & (DDRPHYC_PGSR_IDONE |
560 DDRPHYC_PGSR_DTIERR |
561 DDRPHYC_PGSR_DFTERR |
563 DDRPHYC_PGSR_RVEIRR),
565 debug("\n[0x%08x] pgsr = 0x%08x ret=%d\n",
566 (u32)&phy->pgsr, pgsr, ret);
569 void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
571 pir |= DDRPHYC_PIR_INIT;
572 writel(pir, &phy->pir);
573 debug("[0x%08x] pir = 0x%08x -> 0x%08x\n",
574 (u32)&phy->pir, pir, readl(&phy->pir));
576 /* need to wait 10 configuration clock before start polling */
579 /* Wait DRAM initialization and Gate Training Evaluation complete */
580 ddrphy_idone_wait(phy);
583 /* start quasi dynamic register update */
584 static void start_sw_done(struct stm32mp1_ddrctl *ctl)
586 clrbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
589 /* wait quasi dynamic register update */
590 static void wait_sw_done_ack(struct stm32mp1_ddrctl *ctl)
595 setbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
597 ret = readl_poll_timeout(&ctl->swstat, swstat,
598 swstat & DDRCTRL_SWSTAT_SW_DONE_ACK,
601 panic("Timeout initialising DRAM : DDR->swstat = %x\n",
604 debug("[0x%08x] swstat = 0x%08x\n", (u32)&ctl->swstat, swstat);
607 /* wait quasi dynamic register update */
608 static void wait_operating_mode(struct ddr_info *priv, int mode)
610 u32 stat, val, mask, val2 = 0, mask2 = 0;
613 mask = DDRCTRL_STAT_OPERATING_MODE_MASK;
615 /* self-refresh due to software => check also STAT.selfref_type */
616 if (mode == DDRCTRL_STAT_OPERATING_MODE_SR) {
617 mask |= DDRCTRL_STAT_SELFREF_TYPE_MASK;
618 val |= DDRCTRL_STAT_SELFREF_TYPE_SR;
619 } else if (mode == DDRCTRL_STAT_OPERATING_MODE_NORMAL) {
620 /* normal mode: handle also automatic self refresh */
621 mask2 = DDRCTRL_STAT_OPERATING_MODE_MASK |
622 DDRCTRL_STAT_SELFREF_TYPE_MASK;
623 val2 = DDRCTRL_STAT_OPERATING_MODE_SR |
624 DDRCTRL_STAT_SELFREF_TYPE_ASR;
627 ret = readl_poll_timeout(&priv->ctl->stat, stat,
628 ((stat & mask) == val) ||
629 (mask2 && ((stat & mask2) == val2)),
633 panic("Timeout DRAM : DDR->stat = %x\n", stat);
635 debug("[0x%08x] stat = 0x%08x\n", (u32)&priv->ctl->stat, stat);
638 void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
641 /* quasi-dynamic register update*/
642 setbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
643 clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN |
644 DDRCTRL_PWRCTL_SELFREF_EN);
645 clrbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
646 wait_sw_done_ack(ctl);
649 void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
650 u32 rfshctl3, u32 pwrctl)
653 if (!(rfshctl3 & DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH))
654 clrbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
655 if (pwrctl & DDRCTRL_PWRCTL_POWERDOWN_EN)
656 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
657 if ((pwrctl & DDRCTRL_PWRCTL_SELFREF_EN))
658 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_SELFREF_EN);
659 setbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
660 wait_sw_done_ack(ctl);
663 /* board-specific DDR power initializations. */
664 __weak int board_ddr_power_init(enum ddr_type ddr_type)
670 void stm32mp1_ddr_init(struct ddr_info *priv,
671 const struct stm32mp1_ddr_config *config)
677 switch (config->c_reg.mstr & DDRCTRL_MSTR_DATA_BUS_WIDTH_MASK) {
678 case DDRCTRL_MSTR_DATA_BUS_WIDTH_QUARTER:
681 case DDRCTRL_MSTR_DATA_BUS_WIDTH_HALF:
690 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
691 ret = board_ddr_power_init(STM32MP_DDR3);
692 else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR2) {
694 ret = board_ddr_power_init(STM32MP_LPDDR2_32);
696 ret = board_ddr_power_init(STM32MP_LPDDR2_16);
697 } else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR3) {
699 ret = board_ddr_power_init(STM32MP_LPDDR3_32);
701 ret = board_ddr_power_init(STM32MP_LPDDR3_16);
704 panic("ddr power init failed\n");
707 debug("name = %s\n", config->info.name);
708 debug("speed = %d kHz\n", config->info.speed);
709 debug("size = 0x%x\n", config->info.size);
711 * 1. Program the DWC_ddr_umctl2 registers
712 * 1.1 RESETS: presetn, core_ddrc_rstn, aresetn
714 /* Assert All DDR part */
715 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
716 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
717 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
718 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
719 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
720 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
722 /* 1.2. start CLOCK */
723 if (stm32mp1_ddr_clk_enable(priv, config->info.speed))
724 panic("invalid DRAM clock : %d kHz\n",
727 /* 1.3. deassert reset */
728 /* de-assert PHY rstn and ctl_rstn via DPHYRST and DPHYCTLRST */
729 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
730 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
731 /* De-assert presetn once the clocks are active
732 * and stable via DDRCAPBRST bit
734 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
736 /* 1.4. wait 128 cycles to permit initialization of end logic */
738 /* for PCLK = 133MHz => 1 us is enough, 2 to allow lower frequency */
740 if (INTERACTIVE(STEP_DDR_RESET))
743 /* 1.5. initialize registers ddr_umctl2 */
744 /* Stop uMCTL2 before PHY is ready */
745 clrbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
746 debug("[0x%08x] dfimisc = 0x%08x\n",
747 (u32)&priv->ctl->dfimisc, readl(&priv->ctl->dfimisc));
749 set_reg(priv, REG_REG, &config->c_reg);
750 set_reg(priv, REG_TIMING, &config->c_timing);
751 set_reg(priv, REG_MAP, &config->c_map);
753 /* skip CTRL init, SDRAM init is done by PHY PUBL */
754 clrsetbits_le32(&priv->ctl->init0,
755 DDRCTRL_INIT0_SKIP_DRAM_INIT_MASK,
756 DDRCTRL_INIT0_SKIP_DRAM_INIT_NORMAL);
758 set_reg(priv, REG_PERF, &config->c_perf);
760 if (INTERACTIVE(STEP_CTL_INIT))
763 /* 2. deassert reset signal core_ddrc_rstn, aresetn and presetn */
764 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
765 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
766 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
768 /* 3. start PHY init by accessing relevant PUBL registers
769 * (DXGCR, DCR, PTR*, MR*, DTPR*)
771 set_reg(priv, REGPHY_REG, &config->p_reg);
772 set_reg(priv, REGPHY_TIMING, &config->p_timing);
773 if (config->p_cal_present)
774 set_reg(priv, REGPHY_CAL, &config->p_cal);
776 if (INTERACTIVE(STEP_PHY_INIT))
779 /* 4. Monitor PHY init status by polling PUBL register PGSR.IDONE
780 * Perform DDR PHY DRAM initialization and Gate Training Evaluation
782 ddrphy_idone_wait(priv->phy);
784 /* 5. Indicate to PUBL that controller performs SDRAM initialization
785 * by setting PIR.INIT and PIR CTLDINIT and pool PGSR.IDONE
786 * DRAM init is done by PHY, init0.skip_dram.init = 1
788 pir = DDRPHYC_PIR_DLLSRST | DDRPHYC_PIR_DLLLOCK | DDRPHYC_PIR_ZCAL |
789 DDRPHYC_PIR_ITMSRST | DDRPHYC_PIR_DRAMINIT | DDRPHYC_PIR_ICPC;
791 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
792 pir |= DDRPHYC_PIR_DRAMRST; /* only for DDR3 */
794 stm32mp1_ddrphy_init(priv->phy, pir);
796 /* 6. SET DFIMISC.dfi_init_complete_en to 1 */
797 /* Enable quasi-dynamic register programming*/
798 start_sw_done(priv->ctl);
799 setbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
800 wait_sw_done_ack(priv->ctl);
802 /* 7. Wait for DWC_ddr_umctl2 to move to normal operation mode
803 * by monitoring STAT.operating_mode signal
805 /* wait uMCTL2 ready */
807 wait_operating_mode(priv, DDRCTRL_STAT_OPERATING_MODE_NORMAL);
809 if (config->p_cal_present) {
810 debug("DDR DQS training skipped.\n");
812 debug("DDR DQS training : ");
813 /* 8. Disable Auto refresh and power down by setting
814 * - RFSHCTL3.dis_au_refresh = 1
815 * - PWRCTL.powerdown_en = 0
816 * - DFIMISC.dfiinit_complete_en = 0
818 stm32mp1_refresh_disable(priv->ctl);
820 /* 9. Program PUBL PGCR to enable refresh during training and rank to train
821 * not done => keep the programed value in PGCR
824 /* 10. configure PUBL PIR register to specify which training step to run */
825 /* warning : RVTRN is not supported by this PUBL */
826 stm32mp1_ddrphy_init(priv->phy, DDRPHYC_PIR_QSTRN);
828 /* 11. monitor PUB PGSR.IDONE to poll cpmpletion of training sequence */
829 ddrphy_idone_wait(priv->phy);
831 /* 12. set back registers in step 8 to the orginal values if desidered */
832 stm32mp1_refresh_restore(priv->ctl, config->c_reg.rfshctl3,
833 config->c_reg.pwrctl);
834 } /* if (config->p_cal_present) */
836 /* enable uMCTL2 AXI port 0 and 1 */
837 setbits_le32(&priv->ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
838 setbits_le32(&priv->ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
840 if (INTERACTIVE(STEP_DDR_READY))