1 // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
6 #define LOG_CATEGORY UCLASS_RAM
15 #include <asm/arch/ddr.h>
16 #include <linux/bitops.h>
17 #include <linux/delay.h>
18 #include <linux/iopoll.h>
19 #include "stm32mp1_ddr.h"
20 #include "stm32mp1_ddr_regs.h"
22 #define RCC_DDRITFCR 0xD8
24 #define RCC_DDRITFCR_DDRCAPBRST (BIT(14))
25 #define RCC_DDRITFCR_DDRCAXIRST (BIT(15))
26 #define RCC_DDRITFCR_DDRCORERST (BIT(16))
27 #define RCC_DDRITFCR_DPHYAPBRST (BIT(17))
28 #define RCC_DDRITFCR_DPHYRST (BIT(18))
29 #define RCC_DDRITFCR_DPHYCTLRST (BIT(19))
33 u16 offset; /* offset for base address */
34 u8 par_offset; /* offset for parameter array */
37 #define INVALID_OFFSET 0xFF
39 #define DDRCTL_REG(x, y) \
41 offsetof(struct stm32mp1_ddrctl, x),\
42 offsetof(struct y, x)}
44 #define DDRPHY_REG(x, y) \
46 offsetof(struct stm32mp1_ddrphy, x),\
47 offsetof(struct y, x)}
49 #define DDR_REG_DYN(x) \
51 offsetof(struct stm32mp1_ddrctl, x),\
54 #define DDRPHY_REG_DYN(x) \
56 offsetof(struct stm32mp1_ddrphy, x),\
59 /***********************************************************
60 * PARAMETERS: value get from device tree :
61 * size / order need to be aligned with binding
62 * modification NOT ALLOWED !!!
63 ***********************************************************/
64 #define DDRCTL_REG_REG_SIZE 25 /* st,ctl-reg */
65 #define DDRCTL_REG_TIMING_SIZE 12 /* st,ctl-timing */
66 #define DDRCTL_REG_MAP_SIZE 9 /* st,ctl-map */
67 #define DDRCTL_REG_PERF_SIZE 17 /* st,ctl-perf */
69 #define DDRPHY_REG_REG_SIZE 11 /* st,phy-reg */
70 #define DDRPHY_REG_TIMING_SIZE 10 /* st,phy-timing */
72 #define DDRCTL_REG_REG(x) DDRCTL_REG(x, stm32mp1_ddrctrl_reg)
73 static const struct reg_desc ddr_reg[DDRCTL_REG_REG_SIZE] = {
75 DDRCTL_REG_REG(mrctrl0),
76 DDRCTL_REG_REG(mrctrl1),
77 DDRCTL_REG_REG(derateen),
78 DDRCTL_REG_REG(derateint),
79 DDRCTL_REG_REG(pwrctl),
80 DDRCTL_REG_REG(pwrtmg),
81 DDRCTL_REG_REG(hwlpctl),
82 DDRCTL_REG_REG(rfshctl0),
83 DDRCTL_REG_REG(rfshctl3),
84 DDRCTL_REG_REG(crcparctl0),
85 DDRCTL_REG_REG(zqctl0),
86 DDRCTL_REG_REG(dfitmg0),
87 DDRCTL_REG_REG(dfitmg1),
88 DDRCTL_REG_REG(dfilpcfg0),
89 DDRCTL_REG_REG(dfiupd0),
90 DDRCTL_REG_REG(dfiupd1),
91 DDRCTL_REG_REG(dfiupd2),
92 DDRCTL_REG_REG(dfiphymstr),
93 DDRCTL_REG_REG(odtmap),
96 DDRCTL_REG_REG(dbgcmd),
97 DDRCTL_REG_REG(poisoncfg),
98 DDRCTL_REG_REG(pccfg),
101 #define DDRCTL_REG_TIMING(x) DDRCTL_REG(x, stm32mp1_ddrctrl_timing)
102 static const struct reg_desc ddr_timing[DDRCTL_REG_TIMING_SIZE] = {
103 DDRCTL_REG_TIMING(rfshtmg),
104 DDRCTL_REG_TIMING(dramtmg0),
105 DDRCTL_REG_TIMING(dramtmg1),
106 DDRCTL_REG_TIMING(dramtmg2),
107 DDRCTL_REG_TIMING(dramtmg3),
108 DDRCTL_REG_TIMING(dramtmg4),
109 DDRCTL_REG_TIMING(dramtmg5),
110 DDRCTL_REG_TIMING(dramtmg6),
111 DDRCTL_REG_TIMING(dramtmg7),
112 DDRCTL_REG_TIMING(dramtmg8),
113 DDRCTL_REG_TIMING(dramtmg14),
114 DDRCTL_REG_TIMING(odtcfg),
117 #define DDRCTL_REG_MAP(x) DDRCTL_REG(x, stm32mp1_ddrctrl_map)
118 static const struct reg_desc ddr_map[DDRCTL_REG_MAP_SIZE] = {
119 DDRCTL_REG_MAP(addrmap1),
120 DDRCTL_REG_MAP(addrmap2),
121 DDRCTL_REG_MAP(addrmap3),
122 DDRCTL_REG_MAP(addrmap4),
123 DDRCTL_REG_MAP(addrmap5),
124 DDRCTL_REG_MAP(addrmap6),
125 DDRCTL_REG_MAP(addrmap9),
126 DDRCTL_REG_MAP(addrmap10),
127 DDRCTL_REG_MAP(addrmap11),
130 #define DDRCTL_REG_PERF(x) DDRCTL_REG(x, stm32mp1_ddrctrl_perf)
131 static const struct reg_desc ddr_perf[DDRCTL_REG_PERF_SIZE] = {
132 DDRCTL_REG_PERF(sched),
133 DDRCTL_REG_PERF(sched1),
134 DDRCTL_REG_PERF(perfhpr1),
135 DDRCTL_REG_PERF(perflpr1),
136 DDRCTL_REG_PERF(perfwr1),
137 DDRCTL_REG_PERF(pcfgr_0),
138 DDRCTL_REG_PERF(pcfgw_0),
139 DDRCTL_REG_PERF(pcfgqos0_0),
140 DDRCTL_REG_PERF(pcfgqos1_0),
141 DDRCTL_REG_PERF(pcfgwqos0_0),
142 DDRCTL_REG_PERF(pcfgwqos1_0),
143 DDRCTL_REG_PERF(pcfgr_1),
144 DDRCTL_REG_PERF(pcfgw_1),
145 DDRCTL_REG_PERF(pcfgqos0_1),
146 DDRCTL_REG_PERF(pcfgqos1_1),
147 DDRCTL_REG_PERF(pcfgwqos0_1),
148 DDRCTL_REG_PERF(pcfgwqos1_1),
151 #define DDRPHY_REG_REG(x) DDRPHY_REG(x, stm32mp1_ddrphy_reg)
152 static const struct reg_desc ddrphy_reg[DDRPHY_REG_REG_SIZE] = {
153 DDRPHY_REG_REG(pgcr),
154 DDRPHY_REG_REG(aciocr),
155 DDRPHY_REG_REG(dxccr),
156 DDRPHY_REG_REG(dsgcr),
158 DDRPHY_REG_REG(odtcr),
159 DDRPHY_REG_REG(zq0cr1),
160 DDRPHY_REG_REG(dx0gcr),
161 DDRPHY_REG_REG(dx1gcr),
162 DDRPHY_REG_REG(dx2gcr),
163 DDRPHY_REG_REG(dx3gcr),
166 #define DDRPHY_REG_TIMING(x) DDRPHY_REG(x, stm32mp1_ddrphy_timing)
167 static const struct reg_desc ddrphy_timing[DDRPHY_REG_TIMING_SIZE] = {
168 DDRPHY_REG_TIMING(ptr0),
169 DDRPHY_REG_TIMING(ptr1),
170 DDRPHY_REG_TIMING(ptr2),
171 DDRPHY_REG_TIMING(dtpr0),
172 DDRPHY_REG_TIMING(dtpr1),
173 DDRPHY_REG_TIMING(dtpr2),
174 DDRPHY_REG_TIMING(mr0),
175 DDRPHY_REG_TIMING(mr1),
176 DDRPHY_REG_TIMING(mr2),
177 DDRPHY_REG_TIMING(mr3),
180 /**************************************************************
181 * DYNAMIC REGISTERS: only used for debug purpose (read/modify)
182 **************************************************************/
183 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
184 static const struct reg_desc ddr_dyn[] = {
187 DDR_REG_DYN(dfimisc),
188 DDR_REG_DYN(dfistat),
191 DDR_REG_DYN(pctrl_0),
192 DDR_REG_DYN(pctrl_1),
195 #define DDR_REG_DYN_SIZE ARRAY_SIZE(ddr_dyn)
197 static const struct reg_desc ddrphy_dyn[] = {
199 DDRPHY_REG_DYN(pgsr),
200 DDRPHY_REG_DYN(zq0sr0),
201 DDRPHY_REG_DYN(zq0sr1),
202 DDRPHY_REG_DYN(dx0gsr0),
203 DDRPHY_REG_DYN(dx0gsr1),
204 DDRPHY_REG_DYN(dx0dllcr),
205 DDRPHY_REG_DYN(dx0dqtr),
206 DDRPHY_REG_DYN(dx0dqstr),
207 DDRPHY_REG_DYN(dx1gsr0),
208 DDRPHY_REG_DYN(dx1gsr1),
209 DDRPHY_REG_DYN(dx1dllcr),
210 DDRPHY_REG_DYN(dx1dqtr),
211 DDRPHY_REG_DYN(dx1dqstr),
212 DDRPHY_REG_DYN(dx2gsr0),
213 DDRPHY_REG_DYN(dx2gsr1),
214 DDRPHY_REG_DYN(dx2dllcr),
215 DDRPHY_REG_DYN(dx2dqtr),
216 DDRPHY_REG_DYN(dx2dqstr),
217 DDRPHY_REG_DYN(dx3gsr0),
218 DDRPHY_REG_DYN(dx3gsr1),
219 DDRPHY_REG_DYN(dx3dllcr),
220 DDRPHY_REG_DYN(dx3dqtr),
221 DDRPHY_REG_DYN(dx3dqstr),
224 #define DDRPHY_REG_DYN_SIZE ARRAY_SIZE(ddrphy_dyn)
228 /*****************************************************************
229 * REGISTERS ARRAY: used to parse device tree and interactive mode
230 *****************************************************************/
238 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
239 /* dynamic registers => managed in driver or not changed,
240 * can be dumped in interactive mode
254 struct ddr_reg_info {
256 const struct reg_desc *desc;
261 const struct ddr_reg_info ddr_registers[REG_TYPE_NB] = {
263 "static", ddr_reg, DDRCTL_REG_REG_SIZE, DDR_BASE},
265 "timing", ddr_timing, DDRCTL_REG_TIMING_SIZE, DDR_BASE},
267 "perf", ddr_perf, DDRCTL_REG_PERF_SIZE, DDR_BASE},
269 "map", ddr_map, DDRCTL_REG_MAP_SIZE, DDR_BASE},
271 "static", ddrphy_reg, DDRPHY_REG_REG_SIZE, DDRPHY_BASE},
273 "timing", ddrphy_timing, DDRPHY_REG_TIMING_SIZE, DDRPHY_BASE},
274 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
276 "dyn", ddr_dyn, DDR_REG_DYN_SIZE, DDR_BASE},
278 "dyn", ddrphy_dyn, DDRPHY_REG_DYN_SIZE, DDRPHY_BASE},
283 const char *base_name[] = {
285 [DDRPHY_BASE] = "phy",
288 static u32 get_base_addr(const struct ddr_info *priv, enum base_type base)
290 if (base == DDRPHY_BASE)
291 return (u32)priv->phy;
293 return (u32)priv->ctl;
296 static void set_reg(const struct ddr_info *priv,
301 unsigned int *ptr, value;
302 enum base_type base = ddr_registers[type].base;
303 u32 base_addr = get_base_addr(priv, base);
304 const struct reg_desc *desc = ddr_registers[type].desc;
306 log_debug("init %s\n", ddr_registers[type].name);
307 for (i = 0; i < ddr_registers[type].size; i++) {
308 ptr = (unsigned int *)(base_addr + desc[i].offset);
309 if (desc[i].par_offset == INVALID_OFFSET) {
310 log_err("invalid parameter offset for %s", desc[i].name);
312 value = *((u32 *)((u32)param +
313 desc[i].par_offset));
315 log_debug("[0x%x] %s= 0x%08x\n",
316 (u32)ptr, desc[i].name, value);
321 #ifdef CONFIG_STM32MP1_DDR_INTERACTIVE
322 static void stm32mp1_dump_reg_desc(u32 base_addr, const struct reg_desc *desc)
326 ptr = (unsigned int *)(base_addr + desc->offset);
327 printf("%s= 0x%08x\n", desc->name, readl(ptr));
330 static void stm32mp1_dump_param_desc(u32 par_addr, const struct reg_desc *desc)
334 ptr = (unsigned int *)(par_addr + desc->par_offset);
335 printf("%s= 0x%08x\n", desc->name, readl(ptr));
338 static const struct reg_desc *found_reg(const char *name, enum reg_type *type)
341 const struct reg_desc *desc;
343 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
344 desc = ddr_registers[i].desc;
345 for (j = 0; j < ddr_registers[i].size; j++) {
346 if (strcmp(name, desc[j].name) == 0) {
356 int stm32mp1_dump_reg(const struct ddr_info *priv,
360 const struct reg_desc *desc;
362 enum base_type p_base;
365 enum base_type filter = NONE_BASE;
369 if (strcmp(name, base_name[DDR_BASE]) == 0)
371 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
372 filter = DDRPHY_BASE;
375 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
376 p_base = ddr_registers[i].base;
377 p_name = ddr_registers[i].name;
378 if (!name || (filter == p_base || !strcmp(name, p_name))) {
380 desc = ddr_registers[i].desc;
381 base_addr = get_base_addr(priv, p_base);
382 printf("==%s.%s==\n", base_name[p_base], p_name);
383 for (j = 0; j < ddr_registers[i].size; j++)
384 stm32mp1_dump_reg_desc(base_addr, &desc[j]);
388 desc = found_reg(name, &type);
390 p_base = ddr_registers[type].base;
391 base_addr = get_base_addr(priv, p_base);
392 stm32mp1_dump_reg_desc(base_addr, desc);
399 void stm32mp1_edit_reg(const struct ddr_info *priv,
400 char *name, char *string)
402 unsigned long *ptr, value;
405 const struct reg_desc *desc;
408 desc = found_reg(name, &type);
411 printf("%s not found\n", name);
414 if (strict_strtoul(string, 16, &value) < 0) {
415 printf("invalid value %s\n", string);
418 base = ddr_registers[type].base;
419 base_addr = get_base_addr(priv, base);
420 ptr = (unsigned long *)(base_addr + desc->offset);
422 printf("%s= 0x%08x\n", desc->name, readl(ptr));
425 static u32 get_par_addr(const struct stm32mp1_ddr_config *config,
432 par_addr = (u32)&config->c_reg;
435 par_addr = (u32)&config->c_timing;
438 par_addr = (u32)&config->c_perf;
441 par_addr = (u32)&config->c_map;
444 par_addr = (u32)&config->p_reg;
447 par_addr = (u32)&config->p_timing;
452 par_addr = (u32)NULL;
459 int stm32mp1_dump_param(const struct stm32mp1_ddr_config *config,
463 const struct reg_desc *desc;
465 enum base_type p_base;
468 enum base_type filter = NONE_BASE;
469 int result = -EINVAL;
472 if (strcmp(name, base_name[DDR_BASE]) == 0)
474 else if (strcmp(name, base_name[DDRPHY_BASE]) == 0)
475 filter = DDRPHY_BASE;
478 for (i = 0; i < ARRAY_SIZE(ddr_registers); i++) {
479 par_addr = get_par_addr(config, i);
482 p_base = ddr_registers[i].base;
483 p_name = ddr_registers[i].name;
484 if (!name || (filter == p_base || !strcmp(name, p_name))) {
486 desc = ddr_registers[i].desc;
487 printf("==%s.%s==\n", base_name[p_base], p_name);
488 for (j = 0; j < ddr_registers[i].size; j++)
489 stm32mp1_dump_param_desc(par_addr, &desc[j]);
493 desc = found_reg(name, &type);
495 par_addr = get_par_addr(config, type);
497 stm32mp1_dump_param_desc(par_addr, desc);
505 void stm32mp1_edit_param(const struct stm32mp1_ddr_config *config,
506 char *name, char *string)
508 unsigned long *ptr, value;
510 const struct reg_desc *desc;
513 desc = found_reg(name, &type);
515 printf("%s not found\n", name);
518 if (strict_strtoul(string, 16, &value) < 0) {
519 printf("invalid value %s\n", string);
522 par_addr = get_par_addr(config, type);
524 printf("no parameter %s\n", name);
527 ptr = (unsigned long *)(par_addr + desc->par_offset);
529 printf("%s= 0x%08x\n", desc->name, readl(ptr));
533 __weak bool stm32mp1_ddr_interactive(void *priv,
534 enum stm32mp1_ddr_interact_step step,
535 const struct stm32mp1_ddr_config *config)
540 #define INTERACTIVE(step)\
541 stm32mp1_ddr_interactive(priv, step, config)
543 static void ddrphy_idone_wait(struct stm32mp1_ddrphy *phy)
548 ret = readl_poll_timeout(&phy->pgsr, pgsr,
549 pgsr & (DDRPHYC_PGSR_IDONE |
551 DDRPHYC_PGSR_DTIERR |
552 DDRPHYC_PGSR_DFTERR |
554 DDRPHYC_PGSR_RVEIRR),
556 log_debug("\n[0x%08x] pgsr = 0x%08x ret=%d\n",
557 (u32)&phy->pgsr, pgsr, ret);
560 void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
562 pir |= DDRPHYC_PIR_INIT;
563 writel(pir, &phy->pir);
564 log_debug("[0x%08x] pir = 0x%08x -> 0x%08x\n",
565 (u32)&phy->pir, pir, readl(&phy->pir));
567 /* need to wait 10 configuration clock before start polling */
570 /* Wait DRAM initialization and Gate Training Evaluation complete */
571 ddrphy_idone_wait(phy);
574 /* start quasi dynamic register update */
575 static void start_sw_done(struct stm32mp1_ddrctl *ctl)
577 clrbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
580 /* wait quasi dynamic register update */
581 static void wait_sw_done_ack(struct stm32mp1_ddrctl *ctl)
586 setbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
588 ret = readl_poll_timeout(&ctl->swstat, swstat,
589 swstat & DDRCTRL_SWSTAT_SW_DONE_ACK,
592 panic("Timeout initialising DRAM : DDR->swstat = %x\n",
595 log_debug("[0x%08x] swstat = 0x%08x\n", (u32)&ctl->swstat, swstat);
598 /* wait quasi dynamic register update */
599 static void wait_operating_mode(struct ddr_info *priv, int mode)
601 u32 stat, val, mask, val2 = 0, mask2 = 0;
604 mask = DDRCTRL_STAT_OPERATING_MODE_MASK;
606 /* self-refresh due to software => check also STAT.selfref_type */
607 if (mode == DDRCTRL_STAT_OPERATING_MODE_SR) {
608 mask |= DDRCTRL_STAT_SELFREF_TYPE_MASK;
609 val |= DDRCTRL_STAT_SELFREF_TYPE_SR;
610 } else if (mode == DDRCTRL_STAT_OPERATING_MODE_NORMAL) {
611 /* normal mode: handle also automatic self refresh */
612 mask2 = DDRCTRL_STAT_OPERATING_MODE_MASK |
613 DDRCTRL_STAT_SELFREF_TYPE_MASK;
614 val2 = DDRCTRL_STAT_OPERATING_MODE_SR |
615 DDRCTRL_STAT_SELFREF_TYPE_ASR;
618 ret = readl_poll_timeout(&priv->ctl->stat, stat,
619 ((stat & mask) == val) ||
620 (mask2 && ((stat & mask2) == val2)),
624 panic("Timeout DRAM : DDR->stat = %x\n", stat);
626 log_debug("[0x%08x] stat = 0x%08x\n", (u32)&priv->ctl->stat, stat);
629 void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
632 /* quasi-dynamic register update*/
633 setbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
634 clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN |
635 DDRCTRL_PWRCTL_SELFREF_EN);
636 clrbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
637 wait_sw_done_ack(ctl);
640 void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
641 u32 rfshctl3, u32 pwrctl)
644 if (!(rfshctl3 & DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH))
645 clrbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
646 if (pwrctl & DDRCTRL_PWRCTL_POWERDOWN_EN)
647 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
648 if ((pwrctl & DDRCTRL_PWRCTL_SELFREF_EN))
649 setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_SELFREF_EN);
650 setbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
651 wait_sw_done_ack(ctl);
654 /* board-specific DDR power initializations. */
655 __weak int board_ddr_power_init(enum ddr_type ddr_type)
661 void stm32mp1_ddr_init(struct ddr_info *priv,
662 const struct stm32mp1_ddr_config *config)
668 switch (config->c_reg.mstr & DDRCTRL_MSTR_DATA_BUS_WIDTH_MASK) {
669 case DDRCTRL_MSTR_DATA_BUS_WIDTH_QUARTER:
672 case DDRCTRL_MSTR_DATA_BUS_WIDTH_HALF:
681 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
682 ret = board_ddr_power_init(STM32MP_DDR3);
683 else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR2) {
685 ret = board_ddr_power_init(STM32MP_LPDDR2_32);
687 ret = board_ddr_power_init(STM32MP_LPDDR2_16);
688 } else if (config->c_reg.mstr & DDRCTRL_MSTR_LPDDR3) {
690 ret = board_ddr_power_init(STM32MP_LPDDR3_32);
692 ret = board_ddr_power_init(STM32MP_LPDDR3_16);
695 panic("ddr power init failed\n");
698 log_debug("name = %s\n", config->info.name);
699 log_debug("speed = %d kHz\n", config->info.speed);
700 log_debug("size = 0x%x\n", config->info.size);
702 * 1. Program the DWC_ddr_umctl2 registers
703 * 1.1 RESETS: presetn, core_ddrc_rstn, aresetn
705 /* Assert All DDR part */
706 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
707 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
708 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
709 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
710 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
711 setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
713 /* 1.2. start CLOCK */
714 if (stm32mp1_ddr_clk_enable(priv, config->info.speed))
715 panic("invalid DRAM clock : %d kHz\n",
718 /* 1.3. deassert reset */
719 /* de-assert PHY rstn and ctl_rstn via DPHYRST and DPHYCTLRST */
720 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
721 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
722 /* De-assert presetn once the clocks are active
723 * and stable via DDRCAPBRST bit
725 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
727 /* 1.4. wait 128 cycles to permit initialization of end logic */
729 /* for PCLK = 133MHz => 1 us is enough, 2 to allow lower frequency */
731 if (INTERACTIVE(STEP_DDR_RESET))
734 /* 1.5. initialize registers ddr_umctl2 */
735 /* Stop uMCTL2 before PHY is ready */
736 clrbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
737 log_debug("[0x%08x] dfimisc = 0x%08x\n",
738 (u32)&priv->ctl->dfimisc, readl(&priv->ctl->dfimisc));
740 set_reg(priv, REG_REG, &config->c_reg);
741 set_reg(priv, REG_TIMING, &config->c_timing);
742 set_reg(priv, REG_MAP, &config->c_map);
744 /* skip CTRL init, SDRAM init is done by PHY PUBL */
745 clrsetbits_le32(&priv->ctl->init0,
746 DDRCTRL_INIT0_SKIP_DRAM_INIT_MASK,
747 DDRCTRL_INIT0_SKIP_DRAM_INIT_NORMAL);
749 set_reg(priv, REG_PERF, &config->c_perf);
751 if (INTERACTIVE(STEP_CTL_INIT))
754 /* 2. deassert reset signal core_ddrc_rstn, aresetn and presetn */
755 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
756 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
757 clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
759 /* 3. start PHY init by accessing relevant PUBL registers
760 * (DXGCR, DCR, PTR*, MR*, DTPR*)
762 set_reg(priv, REGPHY_REG, &config->p_reg);
763 set_reg(priv, REGPHY_TIMING, &config->p_timing);
765 if (INTERACTIVE(STEP_PHY_INIT))
768 /* 4. Monitor PHY init status by polling PUBL register PGSR.IDONE
769 * Perform DDR PHY DRAM initialization and Gate Training Evaluation
771 ddrphy_idone_wait(priv->phy);
773 /* 5. Indicate to PUBL that controller performs SDRAM initialization
774 * by setting PIR.INIT and PIR CTLDINIT and pool PGSR.IDONE
775 * DRAM init is done by PHY, init0.skip_dram.init = 1
777 pir = DDRPHYC_PIR_DLLSRST | DDRPHYC_PIR_DLLLOCK | DDRPHYC_PIR_ZCAL |
778 DDRPHYC_PIR_ITMSRST | DDRPHYC_PIR_DRAMINIT | DDRPHYC_PIR_ICPC;
780 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
781 pir |= DDRPHYC_PIR_DRAMRST; /* only for DDR3 */
783 stm32mp1_ddrphy_init(priv->phy, pir);
785 /* 6. SET DFIMISC.dfi_init_complete_en to 1 */
786 /* Enable quasi-dynamic register programming*/
787 start_sw_done(priv->ctl);
788 setbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
789 wait_sw_done_ack(priv->ctl);
791 /* 7. Wait for DWC_ddr_umctl2 to move to normal operation mode
792 * by monitoring STAT.operating_mode signal
794 /* wait uMCTL2 ready */
796 wait_operating_mode(priv, DDRCTRL_STAT_OPERATING_MODE_NORMAL);
798 log_debug("DDR DQS training : ");
799 /* 8. Disable Auto refresh and power down by setting
800 * - RFSHCTL3.dis_au_refresh = 1
801 * - PWRCTL.powerdown_en = 0
802 * - DFIMISC.dfiinit_complete_en = 0
804 stm32mp1_refresh_disable(priv->ctl);
806 /* 9. Program PUBL PGCR to enable refresh during training and rank to train
807 * not done => keep the programed value in PGCR
810 /* 10. configure PUBL PIR register to specify which training step to run */
811 /* RVTRN is excuted only on LPDDR2/LPDDR3 */
812 if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
813 pir = DDRPHYC_PIR_QSTRN;
815 pir = DDRPHYC_PIR_QSTRN | DDRPHYC_PIR_RVTRN;
816 stm32mp1_ddrphy_init(priv->phy, pir);
818 /* 11. monitor PUB PGSR.IDONE to poll cpmpletion of training sequence */
819 ddrphy_idone_wait(priv->phy);
821 /* 12. set back registers in step 8 to the orginal values if desidered */
822 stm32mp1_refresh_restore(priv->ctl, config->c_reg.rfshctl3,
823 config->c_reg.pwrctl);
825 /* enable uMCTL2 AXI port 0 and 1 */
826 setbits_le32(&priv->ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
827 setbits_le32(&priv->ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
829 if (INTERACTIVE(STEP_DDR_READY))