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u-boot/drivers/ram/stm32mp1/stm32mp1_ddr.c
Tom Rini 4549e789c1 SPDX: Convert all of our multiple license tags to Linux Kernel style 
When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have multiple licenses (in
these cases, dual license) declared in the SPDX-License-Identifier tag.
In this case we change from listing "LICENSE-A LICENSE-B" or "LICENSE-A
or LICENSE-B" or "(LICENSE-A OR LICENSE-B)" to "LICENSE-A OR LICENSE-B"
as per the Linux Kernel style document.  Note that parenthesis are
allowed so when they were used before we continue to use them.

Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 10:24:31 -04:00

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// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
/*
* Copyright (C) 2018, STMicroelectronics - All Rights Reserved
*/
#include <common.h>
#include <clk.h>
#include <ram.h>
#include <reset.h>
#include <timer.h>
#include <asm/io.h>
#include <asm/arch/ddr.h>
#include <linux/iopoll.h>
#include "stm32mp1_ddr.h"
#include "stm32mp1_ddr_regs.h"
#define RCC_DDRITFCR 0xD8
#define RCC_DDRITFCR_DDRCAPBRST (BIT(14))
#define RCC_DDRITFCR_DDRCAXIRST (BIT(15))
#define RCC_DDRITFCR_DDRCORERST (BIT(16))
#define RCC_DDRITFCR_DPHYAPBRST (BIT(17))
#define RCC_DDRITFCR_DPHYRST (BIT(18))
#define RCC_DDRITFCR_DPHYCTLRST (BIT(19))
struct reg_desc {
const char *name;
u16 offset; /* offset for base address */
u8 par_offset; /* offset for parameter array */
};
#define INVALID_OFFSET 0xFF
#define DDRCTL_REG(x, y) \
{#x,\
offsetof(struct stm32mp1_ddrctl, x),\
offsetof(struct y, x)}
#define DDRPHY_REG(x, y) \
{#x,\
offsetof(struct stm32mp1_ddrphy, x),\
offsetof(struct y, x)}
#define DDRCTL_REG_REG(x) DDRCTL_REG(x, stm32mp1_ddrctrl_reg)
static const struct reg_desc ddr_reg[] = {
DDRCTL_REG_REG(mstr),
DDRCTL_REG_REG(mrctrl0),
DDRCTL_REG_REG(mrctrl1),
DDRCTL_REG_REG(derateen),
DDRCTL_REG_REG(derateint),
DDRCTL_REG_REG(pwrctl),
DDRCTL_REG_REG(pwrtmg),
DDRCTL_REG_REG(hwlpctl),
DDRCTL_REG_REG(rfshctl0),
DDRCTL_REG_REG(rfshctl3),
DDRCTL_REG_REG(crcparctl0),
DDRCTL_REG_REG(zqctl0),
DDRCTL_REG_REG(dfitmg0),
DDRCTL_REG_REG(dfitmg1),
DDRCTL_REG_REG(dfilpcfg0),
DDRCTL_REG_REG(dfiupd0),
DDRCTL_REG_REG(dfiupd1),
DDRCTL_REG_REG(dfiupd2),
DDRCTL_REG_REG(dfiphymstr),
DDRCTL_REG_REG(odtmap),
DDRCTL_REG_REG(dbg0),
DDRCTL_REG_REG(dbg1),
DDRCTL_REG_REG(dbgcmd),
DDRCTL_REG_REG(poisoncfg),
DDRCTL_REG_REG(pccfg),
};
#define DDRCTL_REG_TIMING(x) DDRCTL_REG(x, stm32mp1_ddrctrl_timing)
static const struct reg_desc ddr_timing[] = {
DDRCTL_REG_TIMING(rfshtmg),
DDRCTL_REG_TIMING(dramtmg0),
DDRCTL_REG_TIMING(dramtmg1),
DDRCTL_REG_TIMING(dramtmg2),
DDRCTL_REG_TIMING(dramtmg3),
DDRCTL_REG_TIMING(dramtmg4),
DDRCTL_REG_TIMING(dramtmg5),
DDRCTL_REG_TIMING(dramtmg6),
DDRCTL_REG_TIMING(dramtmg7),
DDRCTL_REG_TIMING(dramtmg8),
DDRCTL_REG_TIMING(dramtmg14),
DDRCTL_REG_TIMING(odtcfg),
};
#define DDRCTL_REG_MAP(x) DDRCTL_REG(x, stm32mp1_ddrctrl_map)
static const struct reg_desc ddr_map[] = {
DDRCTL_REG_MAP(addrmap1),
DDRCTL_REG_MAP(addrmap2),
DDRCTL_REG_MAP(addrmap3),
DDRCTL_REG_MAP(addrmap4),
DDRCTL_REG_MAP(addrmap5),
DDRCTL_REG_MAP(addrmap6),
DDRCTL_REG_MAP(addrmap9),
DDRCTL_REG_MAP(addrmap10),
DDRCTL_REG_MAP(addrmap11),
};
#define DDRCTL_REG_PERF(x) DDRCTL_REG(x, stm32mp1_ddrctrl_perf)
static const struct reg_desc ddr_perf[] = {
DDRCTL_REG_PERF(sched),
DDRCTL_REG_PERF(sched1),
DDRCTL_REG_PERF(perfhpr1),
DDRCTL_REG_PERF(perflpr1),
DDRCTL_REG_PERF(perfwr1),
DDRCTL_REG_PERF(pcfgr_0),
DDRCTL_REG_PERF(pcfgw_0),
DDRCTL_REG_PERF(pcfgqos0_0),
DDRCTL_REG_PERF(pcfgqos1_0),
DDRCTL_REG_PERF(pcfgwqos0_0),
DDRCTL_REG_PERF(pcfgwqos1_0),
DDRCTL_REG_PERF(pcfgr_1),
DDRCTL_REG_PERF(pcfgw_1),
DDRCTL_REG_PERF(pcfgqos0_1),
DDRCTL_REG_PERF(pcfgqos1_1),
DDRCTL_REG_PERF(pcfgwqos0_1),
DDRCTL_REG_PERF(pcfgwqos1_1),
};
#define DDRPHY_REG_REG(x) DDRPHY_REG(x, stm32mp1_ddrphy_reg)
static const struct reg_desc ddrphy_reg[] = {
DDRPHY_REG_REG(pgcr),
DDRPHY_REG_REG(aciocr),
DDRPHY_REG_REG(dxccr),
DDRPHY_REG_REG(dsgcr),
DDRPHY_REG_REG(dcr),
DDRPHY_REG_REG(odtcr),
DDRPHY_REG_REG(zq0cr1),
DDRPHY_REG_REG(dx0gcr),
DDRPHY_REG_REG(dx1gcr),
DDRPHY_REG_REG(dx2gcr),
DDRPHY_REG_REG(dx3gcr),
};
#define DDRPHY_REG_TIMING(x) DDRPHY_REG(x, stm32mp1_ddrphy_timing)
static const struct reg_desc ddrphy_timing[] = {
DDRPHY_REG_TIMING(ptr0),
DDRPHY_REG_TIMING(ptr1),
DDRPHY_REG_TIMING(ptr2),
DDRPHY_REG_TIMING(dtpr0),
DDRPHY_REG_TIMING(dtpr1),
DDRPHY_REG_TIMING(dtpr2),
DDRPHY_REG_TIMING(mr0),
DDRPHY_REG_TIMING(mr1),
DDRPHY_REG_TIMING(mr2),
DDRPHY_REG_TIMING(mr3),
};
#define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
static const struct reg_desc ddrphy_cal[] = {
DDRPHY_REG_CAL(dx0dllcr),
DDRPHY_REG_CAL(dx0dqtr),
DDRPHY_REG_CAL(dx0dqstr),
DDRPHY_REG_CAL(dx1dllcr),
DDRPHY_REG_CAL(dx1dqtr),
DDRPHY_REG_CAL(dx1dqstr),
DDRPHY_REG_CAL(dx2dllcr),
DDRPHY_REG_CAL(dx2dqtr),
DDRPHY_REG_CAL(dx2dqstr),
DDRPHY_REG_CAL(dx3dllcr),
DDRPHY_REG_CAL(dx3dqtr),
DDRPHY_REG_CAL(dx3dqstr),
};
enum reg_type {
REG_REG,
REG_TIMING,
REG_PERF,
REG_MAP,
REGPHY_REG,
REGPHY_TIMING,
REGPHY_CAL,
REG_TYPE_NB
};
enum base_type {
DDR_BASE,
DDRPHY_BASE,
NONE_BASE
};
struct ddr_reg_info {
const char *name;
const struct reg_desc *desc;
u8 size;
enum base_type base;
};
#define DDRPHY_REG_CAL(x) DDRPHY_REG(x, stm32mp1_ddrphy_cal)
const struct ddr_reg_info ddr_registers[REG_TYPE_NB] = {
[REG_REG] = {
"static", ddr_reg, ARRAY_SIZE(ddr_reg), DDR_BASE},
[REG_TIMING] = {
"timing", ddr_timing, ARRAY_SIZE(ddr_timing), DDR_BASE},
[REG_PERF] = {
"perf", ddr_perf, ARRAY_SIZE(ddr_perf), DDR_BASE},
[REG_MAP] = {
"map", ddr_map, ARRAY_SIZE(ddr_map), DDR_BASE},
[REGPHY_REG] = {
"static", ddrphy_reg, ARRAY_SIZE(ddrphy_reg), DDRPHY_BASE},
[REGPHY_TIMING] = {
"timing", ddrphy_timing, ARRAY_SIZE(ddrphy_timing), DDRPHY_BASE},
[REGPHY_CAL] = {
"cal", ddrphy_cal, ARRAY_SIZE(ddrphy_cal), DDRPHY_BASE},
};
const char *base_name[] = {
[DDR_BASE] = "ctl",
[DDRPHY_BASE] = "phy",
};
static u32 get_base_addr(const struct ddr_info *priv, enum base_type base)
{
if (base == DDRPHY_BASE)
return (u32)priv->phy;
else
return (u32)priv->ctl;
}
static void set_reg(const struct ddr_info *priv,
enum reg_type type,
const void *param)
{
unsigned int i;
unsigned int *ptr, value;
enum base_type base = ddr_registers[type].base;
u32 base_addr = get_base_addr(priv, base);
const struct reg_desc *desc = ddr_registers[type].desc;
debug("init %s\n", ddr_registers[type].name);
for (i = 0; i < ddr_registers[type].size; i++) {
ptr = (unsigned int *)(base_addr + desc[i].offset);
if (desc[i].par_offset == INVALID_OFFSET) {
pr_err("invalid parameter offset for %s", desc[i].name);
} else {
value = *((u32 *)((u32)param +
desc[i].par_offset));
writel(value, ptr);
debug("[0x%x] %s= 0x%08x\n",
(u32)ptr, desc[i].name, value);
}
}
}
static void ddrphy_idone_wait(struct stm32mp1_ddrphy *phy)
{
u32 pgsr;
int ret;
ret = readl_poll_timeout(&phy->pgsr, pgsr,
pgsr & (DDRPHYC_PGSR_IDONE |
DDRPHYC_PGSR_DTERR |
DDRPHYC_PGSR_DTIERR |
DDRPHYC_PGSR_DFTERR |
DDRPHYC_PGSR_RVERR |
DDRPHYC_PGSR_RVEIRR),
1000000);
debug("\n[0x%08x] pgsr = 0x%08x ret=%d\n",
(u32)&phy->pgsr, pgsr, ret);
}
void stm32mp1_ddrphy_init(struct stm32mp1_ddrphy *phy, u32 pir)
{
pir |= DDRPHYC_PIR_INIT;
writel(pir, &phy->pir);
debug("[0x%08x] pir = 0x%08x -> 0x%08x\n",
(u32)&phy->pir, pir, readl(&phy->pir));
/* need to wait 10 configuration clock before start polling */
udelay(10);
/* Wait DRAM initialization and Gate Training Evaluation complete */
ddrphy_idone_wait(phy);
}
/* start quasi dynamic register update */
static void start_sw_done(struct stm32mp1_ddrctl *ctl)
{
clrbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
}
/* wait quasi dynamic register update */
static void wait_sw_done_ack(struct stm32mp1_ddrctl *ctl)
{
int ret;
u32 swstat;
setbits_le32(&ctl->swctl, DDRCTRL_SWCTL_SW_DONE);
ret = readl_poll_timeout(&ctl->swstat, swstat,
swstat & DDRCTRL_SWSTAT_SW_DONE_ACK,
1000000);
if (ret)
panic("Timeout initialising DRAM : DDR->swstat = %x\n",
swstat);
debug("[0x%08x] swstat = 0x%08x\n", (u32)&ctl->swstat, swstat);
}
/* wait quasi dynamic register update */
static void wait_operating_mode(struct ddr_info *priv, int mode)
{
u32 stat, val, mask, val2 = 0, mask2 = 0;
int ret;
mask = DDRCTRL_STAT_OPERATING_MODE_MASK;
val = mode;
/* self-refresh due to software => check also STAT.selfref_type */
if (mode == DDRCTRL_STAT_OPERATING_MODE_SR) {
mask |= DDRCTRL_STAT_SELFREF_TYPE_MASK;
stat |= DDRCTRL_STAT_SELFREF_TYPE_SR;
} else if (mode == DDRCTRL_STAT_OPERATING_MODE_NORMAL) {
/* normal mode: handle also automatic self refresh */
mask2 = DDRCTRL_STAT_OPERATING_MODE_MASK |
DDRCTRL_STAT_SELFREF_TYPE_MASK;
val2 = DDRCTRL_STAT_OPERATING_MODE_SR |
DDRCTRL_STAT_SELFREF_TYPE_ASR;
}
ret = readl_poll_timeout(&priv->ctl->stat, stat,
((stat & mask) == val) ||
(mask2 && ((stat & mask2) == val2)),
1000000);
if (ret)
panic("Timeout DRAM : DDR->stat = %x\n", stat);
debug("[0x%08x] stat = 0x%08x\n", (u32)&priv->ctl->stat, stat);
}
void stm32mp1_refresh_disable(struct stm32mp1_ddrctl *ctl)
{
start_sw_done(ctl);
/* quasi-dynamic register update*/
setbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
clrbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
clrbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
wait_sw_done_ack(ctl);
}
void stm32mp1_refresh_restore(struct stm32mp1_ddrctl *ctl,
u32 rfshctl3, u32 pwrctl)
{
start_sw_done(ctl);
if (!(rfshctl3 & DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH))
clrbits_le32(&ctl->rfshctl3, DDRCTRL_RFSHCTL3_DIS_AUTO_REFRESH);
if (pwrctl & DDRCTRL_PWRCTL_POWERDOWN_EN)
setbits_le32(&ctl->pwrctl, DDRCTRL_PWRCTL_POWERDOWN_EN);
setbits_le32(&ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
wait_sw_done_ack(ctl);
}
/* board-specific DDR power initializations. */
__weak int board_ddr_power_init(void)
{
return 0;
}
__maybe_unused
void stm32mp1_ddr_init(struct ddr_info *priv,
const struct stm32mp1_ddr_config *config)
{
u32 pir;
int ret;
ret = board_ddr_power_init();
if (ret)
panic("ddr power init failed\n");
debug("name = %s\n", config->info.name);
debug("speed = %d MHz\n", config->info.speed);
debug("size = 0x%x\n", config->info.size);
/*
* 1. Program the DWC_ddr_umctl2 registers
* 1.1 RESETS: presetn, core_ddrc_rstn, aresetn
*/
/* Assert All DDR part */
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
setbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
/* 1.2. start CLOCK */
if (stm32mp1_ddr_clk_enable(priv, config->info.speed))
panic("invalid DRAM clock : %d MHz\n",
config->info.speed);
/* 1.3. deassert reset */
/* de-assert PHY rstn and ctl_rstn via DPHYRST and DPHYCTLRST */
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYRST);
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYCTLRST);
/* De-assert presetn once the clocks are active
* and stable via DDRCAPBRST bit
*/
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAPBRST);
/* 1.4. wait 4 cycles for synchronization */
asm(" nop");
asm(" nop");
asm(" nop");
asm(" nop");
/* 1.5. initialize registers ddr_umctl2 */
/* Stop uMCTL2 before PHY is ready */
clrbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
debug("[0x%08x] dfimisc = 0x%08x\n",
(u32)&priv->ctl->dfimisc, readl(&priv->ctl->dfimisc));
set_reg(priv, REG_REG, &config->c_reg);
set_reg(priv, REG_TIMING, &config->c_timing);
set_reg(priv, REG_MAP, &config->c_map);
/* skip CTRL init, SDRAM init is done by PHY PUBL */
clrsetbits_le32(&priv->ctl->init0,
DDRCTRL_INIT0_SKIP_DRAM_INIT_MASK,
DDRCTRL_INIT0_SKIP_DRAM_INIT_NORMAL);
set_reg(priv, REG_PERF, &config->c_perf);
/* 2. deassert reset signal core_ddrc_rstn, aresetn and presetn */
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCORERST);
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DDRCAXIRST);
clrbits_le32(priv->rcc + RCC_DDRITFCR, RCC_DDRITFCR_DPHYAPBRST);
/* 3. start PHY init by accessing relevant PUBL registers
* (DXGCR, DCR, PTR*, MR*, DTPR*)
*/
set_reg(priv, REGPHY_REG, &config->p_reg);
set_reg(priv, REGPHY_TIMING, &config->p_timing);
set_reg(priv, REGPHY_CAL, &config->p_cal);
/* 4. Monitor PHY init status by polling PUBL register PGSR.IDONE
* Perform DDR PHY DRAM initialization and Gate Training Evaluation
*/
ddrphy_idone_wait(priv->phy);
/* 5. Indicate to PUBL that controller performs SDRAM initialization
* by setting PIR.INIT and PIR CTLDINIT and pool PGSR.IDONE
* DRAM init is done by PHY, init0.skip_dram.init = 1
*/
pir = DDRPHYC_PIR_DLLSRST | DDRPHYC_PIR_DLLLOCK | DDRPHYC_PIR_ZCAL |
DDRPHYC_PIR_ITMSRST | DDRPHYC_PIR_DRAMINIT | DDRPHYC_PIR_ICPC;
if (config->c_reg.mstr & DDRCTRL_MSTR_DDR3)
pir |= DDRPHYC_PIR_DRAMRST; /* only for DDR3 */
stm32mp1_ddrphy_init(priv->phy, pir);
/* 6. SET DFIMISC.dfi_init_complete_en to 1 */
/* Enable quasi-dynamic register programming*/
start_sw_done(priv->ctl);
setbits_le32(&priv->ctl->dfimisc, DDRCTRL_DFIMISC_DFI_INIT_COMPLETE_EN);
wait_sw_done_ack(priv->ctl);
/* 7. Wait for DWC_ddr_umctl2 to move to normal operation mode
* by monitoring STAT.operating_mode signal
*/
/* wait uMCTL2 ready */
wait_operating_mode(priv, DDRCTRL_STAT_OPERATING_MODE_NORMAL);
debug("DDR DQS training : ");
/* 8. Disable Auto refresh and power down by setting
* - RFSHCTL3.dis_au_refresh = 1
* - PWRCTL.powerdown_en = 0
* - DFIMISC.dfiinit_complete_en = 0
*/
stm32mp1_refresh_disable(priv->ctl);
/* 9. Program PUBL PGCR to enable refresh during training and rank to train
* not done => keep the programed value in PGCR
*/
/* 10. configure PUBL PIR register to specify which training step to run */
/* warning : RVTRN is not supported by this PUBL */
stm32mp1_ddrphy_init(priv->phy, DDRPHYC_PIR_QSTRN);
/* 11. monitor PUB PGSR.IDONE to poll cpmpletion of training sequence */
ddrphy_idone_wait(priv->phy);
/* 12. set back registers in step 8 to the orginal values if desidered */
stm32mp1_refresh_restore(priv->ctl, config->c_reg.rfshctl3,
config->c_reg.pwrctl);
/* enable uMCTL2 AXI port 0 and 1 */
setbits_le32(&priv->ctl->pctrl_0, DDRCTRL_PCTRL_N_PORT_EN);
setbits_le32(&priv->ctl->pctrl_1, DDRCTRL_PCTRL_N_PORT_EN);
}
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