arch/arm/cpu/armv7/keystone/ddr3.c

   1 /*
   2  * Keystone2: DDR3 initialization
   3  *
   4  * (C) Copyright 2012-2014
   5  *     Texas Instruments Incorporated, <www.ti.com>
   6  *
   7  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <asm/io.h>
  11 #include <common.h>
  12 #include <asm/arch/msmc.h>
  13 #include <asm/arch/ddr3.h>
  14 #include <asm/arch/psc_defs.h>
  15
  16 #include <asm/ti-common/ti-edma3.h>
  17
  18 #define DDR3_EDMA_BLK_SIZE_SHIFT        10
  19 #define DDR3_EDMA_BLK_SIZE              (1 << DDR3_EDMA_BLK_SIZE_SHIFT)
  20 #define DDR3_EDMA_BCNT                  0x8000
  21 #define DDR3_EDMA_CCNT                  1
  22 #define DDR3_EDMA_XF_SIZE               (DDR3_EDMA_BLK_SIZE * DDR3_EDMA_BCNT)
  23 #define DDR3_EDMA_SLOT_NUM              1
  24
  25 void ddr3_init_ddrphy(u32 base, struct ddr3_phy_config *phy_cfg)
  26 {
  27         unsigned int tmp;
  28
  29         while ((__raw_readl(base + KS2_DDRPHY_PGSR0_OFFSET)
  30                  & 0x00000001) != 0x00000001)
  31                 ;
  32
  33         __raw_writel(phy_cfg->pllcr, base + KS2_DDRPHY_PLLCR_OFFSET);
  34
  35         tmp = __raw_readl(base + KS2_DDRPHY_PGCR1_OFFSET);
  36         tmp &= ~(phy_cfg->pgcr1_mask);
  37         tmp |= phy_cfg->pgcr1_val;
  38         __raw_writel(tmp, base + KS2_DDRPHY_PGCR1_OFFSET);
  39
  40         __raw_writel(phy_cfg->ptr0,   base + KS2_DDRPHY_PTR0_OFFSET);
  41         __raw_writel(phy_cfg->ptr1,   base + KS2_DDRPHY_PTR1_OFFSET);
  42         __raw_writel(phy_cfg->ptr3,  base + KS2_DDRPHY_PTR3_OFFSET);
  43         __raw_writel(phy_cfg->ptr4,  base + KS2_DDRPHY_PTR4_OFFSET);
  44
  45         tmp =  __raw_readl(base + KS2_DDRPHY_DCR_OFFSET);
  46         tmp &= ~(phy_cfg->dcr_mask);
  47         tmp |= phy_cfg->dcr_val;
  48         __raw_writel(tmp, base + KS2_DDRPHY_DCR_OFFSET);
  49
  50         __raw_writel(phy_cfg->dtpr0, base + KS2_DDRPHY_DTPR0_OFFSET);
  51         __raw_writel(phy_cfg->dtpr1, base + KS2_DDRPHY_DTPR1_OFFSET);
  52         __raw_writel(phy_cfg->dtpr2, base + KS2_DDRPHY_DTPR2_OFFSET);
  53         __raw_writel(phy_cfg->mr0,   base + KS2_DDRPHY_MR0_OFFSET);
  54         __raw_writel(phy_cfg->mr1,   base + KS2_DDRPHY_MR1_OFFSET);
  55         __raw_writel(phy_cfg->mr2,   base + KS2_DDRPHY_MR2_OFFSET);
  56         __raw_writel(phy_cfg->dtcr,  base + KS2_DDRPHY_DTCR_OFFSET);
  57         __raw_writel(phy_cfg->pgcr2, base + KS2_DDRPHY_PGCR2_OFFSET);
  58
  59         __raw_writel(phy_cfg->zq0cr1, base + KS2_DDRPHY_ZQ0CR1_OFFSET);
  60         __raw_writel(phy_cfg->zq1cr1, base + KS2_DDRPHY_ZQ1CR1_OFFSET);
  61         __raw_writel(phy_cfg->zq2cr1, base + KS2_DDRPHY_ZQ2CR1_OFFSET);
  62
  63         __raw_writel(phy_cfg->pir_v1, base + KS2_DDRPHY_PIR_OFFSET);
  64         while ((__raw_readl(base + KS2_DDRPHY_PGSR0_OFFSET) & 0x1) != 0x1)
  65                 ;
  66
  67         __raw_writel(phy_cfg->pir_v2, base + KS2_DDRPHY_PIR_OFFSET);
  68         while ((__raw_readl(base + KS2_DDRPHY_PGSR0_OFFSET) & 0x1) != 0x1)
  69                 ;
  70 }
  71
  72 void ddr3_init_ddremif(u32 base, struct ddr3_emif_config *emif_cfg)
  73 {
  74         __raw_writel(emif_cfg->sdcfg,  base + KS2_DDR3_SDCFG_OFFSET);
  75         __raw_writel(emif_cfg->sdtim1, base + KS2_DDR3_SDTIM1_OFFSET);
  76         __raw_writel(emif_cfg->sdtim2, base + KS2_DDR3_SDTIM2_OFFSET);
  77         __raw_writel(emif_cfg->sdtim3, base + KS2_DDR3_SDTIM3_OFFSET);
  78         __raw_writel(emif_cfg->sdtim4, base + KS2_DDR3_SDTIM4_OFFSET);
  79         __raw_writel(emif_cfg->zqcfg,  base + KS2_DDR3_ZQCFG_OFFSET);
  80         __raw_writel(emif_cfg->sdrfc,  base + KS2_DDR3_SDRFC_OFFSET);
  81 }
  82
  83 int ddr3_ecc_support_rmw(u32 base)
  84 {
  85         u32 value = __raw_readl(base + KS2_DDR3_MIDR_OFFSET);
  86
  87         /* Check the DDR3 controller ID reg if the controllers
  88            supports ECC RMW or not */
  89         if (value == 0x40461C02)
  90                 return 1;
  91
  92         return 0;
  93 }
  94
  95 static void ddr3_ecc_config(u32 base, u32 value)
  96 {
  97         u32 data;
  98
  99         __raw_writel(value,  base + KS2_DDR3_ECC_CTRL_OFFSET);
 100         udelay(100000); /* delay required to synchronize across clock domains */
 101
 102         if (value & KS2_DDR3_ECC_EN) {
 103                 /* Clear the 1-bit error count */
 104                 data = __raw_readl(base + KS2_DDR3_ONE_BIT_ECC_ERR_CNT_OFFSET);
 105                 __raw_writel(data, base + KS2_DDR3_ONE_BIT_ECC_ERR_CNT_OFFSET);
 106
 107                 /* enable the ECC interrupt */
 108                 __raw_writel(KS2_DDR3_1B_ECC_ERR_SYS | KS2_DDR3_2B_ECC_ERR_SYS |
 109                              KS2_DDR3_WR_ECC_ERR_SYS,
 110                              base + KS2_DDR3_ECC_INT_ENABLE_SET_SYS_OFFSET);
 111
 112                 /* Clear the ECC error interrupt status */
 113                 __raw_writel(KS2_DDR3_1B_ECC_ERR_SYS | KS2_DDR3_2B_ECC_ERR_SYS |
 114                              KS2_DDR3_WR_ECC_ERR_SYS,
 115                              base + KS2_DDR3_ECC_INT_STATUS_OFFSET);
 116         }
 117 }
 118
 119 static void ddr3_reset_data(u32 base, u32 ddr3_size)
 120 {
 121         u32 mpax[2];
 122         u32 seg_num;
 123         u32 seg, blks, dst, edma_blks;
 124         struct edma3_slot_config slot;
 125         struct edma3_channel_config edma_channel;
 126         u32 edma_src[DDR3_EDMA_BLK_SIZE/4] __aligned(16) = {0, };
 127
 128         /* Setup an edma to copy the 1k block to the entire DDR */
 129         puts("\nClear entire DDR3 memory to enable ECC\n");
 130
 131         /* save the SES MPAX regs */
 132         msmc_get_ses_mpax(8, 0, mpax);
 133
 134         /* setup edma slot 1 configuration */
 135         slot.opt = EDMA3_SLOPT_TRANS_COMP_INT_ENB |
 136                    EDMA3_SLOPT_COMP_CODE(0) |
 137                    EDMA3_SLOPT_STATIC | EDMA3_SLOPT_AB_SYNC;
 138         slot.bcnt = DDR3_EDMA_BCNT;
 139         slot.acnt = DDR3_EDMA_BLK_SIZE;
 140         slot.ccnt = DDR3_EDMA_CCNT;
 141         slot.src_bidx = 0;
 142         slot.dst_bidx = DDR3_EDMA_BLK_SIZE;
 143         slot.src_cidx = 0;
 144         slot.dst_cidx = 0;
 145         slot.link = EDMA3_PARSET_NULL_LINK;
 146         slot.bcntrld = 0;
 147         edma3_slot_configure(KS2_EDMA0_BASE, DDR3_EDMA_SLOT_NUM, &slot);
 148
 149         /* configure quik edma channel */
 150         edma_channel.slot = DDR3_EDMA_SLOT_NUM;
 151         edma_channel.chnum = 0;
 152         edma_channel.complete_code = 0;
 153         /* event trigger after dst update */
 154         edma_channel.trigger_slot_word = EDMA3_TWORD(dst);
 155         qedma3_start(KS2_EDMA0_BASE, &edma_channel);
 156
 157         /* DDR3 size in segments (4KB seg size) */
 158         seg_num = ddr3_size << (30 - KS2_MSMC_SEG_SIZE_SHIFT);
 159
 160         for (seg = 0; seg < seg_num; seg += KS2_MSMC_MAP_SEG_NUM) {
 161                 /* map 2GB 36-bit DDR address to 32-bit DDR address in EMIF
 162                    access slave interface so that edma driver can access */
 163                 msmc_map_ses_segment(8, 0, base >> KS2_MSMC_SEG_SIZE_SHIFT,
 164                                      KS2_MSMC_DST_SEG_BASE + seg, MPAX_SEG_2G);
 165
 166                 if ((seg_num - seg) > KS2_MSMC_MAP_SEG_NUM)
 167                         edma_blks = KS2_MSMC_MAP_SEG_NUM <<
 168                                         (KS2_MSMC_SEG_SIZE_SHIFT
 169                                         - DDR3_EDMA_BLK_SIZE_SHIFT);
 170                 else
 171                         edma_blks = (seg_num - seg) << (KS2_MSMC_SEG_SIZE_SHIFT
 172                                         - DDR3_EDMA_BLK_SIZE_SHIFT);
 173
 174                 /* Use edma driver to scrub 2GB DDR memory */
 175                 for (dst = base, blks = 0; blks < edma_blks;
 176                      blks += DDR3_EDMA_BCNT, dst += DDR3_EDMA_XF_SIZE) {
 177                         edma3_set_src_addr(KS2_EDMA0_BASE,
 178                                            edma_channel.slot, (u32)edma_src);
 179                         edma3_set_dest_addr(KS2_EDMA0_BASE,
 180                                             edma_channel.slot, (u32)dst);
 181
 182                         while (edma3_check_for_transfer(KS2_EDMA0_BASE,
 183                                                         &edma_channel))
 184                                 udelay(10);
 185                 }
 186         }
 187
 188         qedma3_stop(KS2_EDMA0_BASE, &edma_channel);
 189
 190         /* restore the SES MPAX regs */
 191         msmc_set_ses_mpax(8, 0, mpax);
 192 }
 193
 194 static void ddr3_ecc_init_range(u32 base)
 195 {
 196         u32 ecc_val = KS2_DDR3_ECC_EN;
 197         u32 rmw = ddr3_ecc_support_rmw(base);
 198
 199         if (rmw)
 200                 ecc_val |= KS2_DDR3_ECC_RMW_EN;
 201
 202         __raw_writel(0, base + KS2_DDR3_ECC_ADDR_RANGE1_OFFSET);
 203
 204         ddr3_ecc_config(base, ecc_val);
 205 }
 206
 207 void ddr3_enable_ecc(u32 base, int test)
 208 {
 209         u32 ecc_val = KS2_DDR3_ECC_ENABLE;
 210         u32 rmw = ddr3_ecc_support_rmw(base);
 211
 212         if (test)
 213                 ecc_val |= KS2_DDR3_ECC_ADDR_RNG_1_EN;
 214
 215         if (!rmw) {
 216                 if (!test)
 217                         /* by default, disable ecc when rmw = 0 and no
 218                            ecc test */
 219                         ecc_val = 0;
 220         } else {
 221                 ecc_val |= KS2_DDR3_ECC_RMW_EN;
 222         }
 223
 224         ddr3_ecc_config(base, ecc_val);
 225 }
 226
 227 void ddr3_disable_ecc(u32 base)
 228 {
 229         ddr3_ecc_config(base, 0);
 230 }
 231
 232 #if defined(CONFIG_SOC_K2HK) || defined(CONFIG_SOC_K2L)
 233 static void cic_init(u32 base)
 234 {
 235         /* Disable CIC global interrupts */
 236         __raw_writel(0, base + KS2_CIC_GLOBAL_ENABLE);
 237
 238         /* Set to normal mode, no nesting, no priority hold */
 239         __raw_writel(0, base + KS2_CIC_CTRL);
 240         __raw_writel(0, base + KS2_CIC_HOST_CTRL);
 241
 242         /* Enable CIC global interrupts */
 243         __raw_writel(1, base + KS2_CIC_GLOBAL_ENABLE);
 244 }
 245
 246 static void cic_map_cic_to_gic(u32 base, u32 chan_num, u32 irq_num)
 247 {
 248         /* Map the system interrupt to a CIC channel */
 249         __raw_writeb(chan_num, base + KS2_CIC_CHAN_MAP(0) + irq_num);
 250
 251         /* Enable CIC system interrupt */
 252         __raw_writel(irq_num, base + KS2_CIC_SYS_ENABLE_IDX_SET);
 253
 254         /* Enable CIC Host interrupt */
 255         __raw_writel(chan_num, base + KS2_CIC_HOST_ENABLE_IDX_SET);
 256 }
 257
 258 static void ddr3_map_ecc_cic2_irq(u32 base)
 259 {
 260         cic_init(base);
 261         cic_map_cic_to_gic(base, KS2_CIC2_DDR3_ECC_CHAN_NUM,
 262                            KS2_CIC2_DDR3_ECC_IRQ_NUM);
 263 }
 264 #endif
 265
 266 void ddr3_init_ecc(u32 base)
 267 {
 268         u32 ddr3_size;
 269
 270         if (!ddr3_ecc_support_rmw(base)) {
 271                 ddr3_disable_ecc(base);
 272                 return;
 273         }
 274
 275         ddr3_ecc_init_range(base);
 276         ddr3_size = ddr3_get_size();
 277         ddr3_reset_data(CONFIG_SYS_SDRAM_BASE, ddr3_size);
 278
 279         /* mapping DDR3 ECC system interrupt from CIC2 to GIC */
 280 #if defined(CONFIG_SOC_K2HK) || defined(CONFIG_SOC_K2L)
 281         ddr3_map_ecc_cic2_irq(KS2_CIC2_BASE);
 282 #endif
 283         ddr3_enable_ecc(base, 0);
 284 }
 285
 286 void ddr3_check_ecc_int(u32 base)
 287 {
 288         char *env;
 289         int ecc_test = 0;
 290         u32 value = __raw_readl(base + KS2_DDR3_ECC_INT_STATUS_OFFSET);
 291
 292         env = getenv("ecc_test");
 293         if (env)
 294                 ecc_test = simple_strtol(env, NULL, 0);
 295
 296         if (value & KS2_DDR3_WR_ECC_ERR_SYS)
 297                 puts("DDR3 ECC write error interrupted\n");
 298
 299         if (value & KS2_DDR3_2B_ECC_ERR_SYS) {
 300                 puts("DDR3 ECC 2-bit error interrupted\n");
 301
 302                 if (!ecc_test) {
 303                         puts("Reseting the device ...\n");
 304                         reset_cpu(0);
 305                 }
 306         }
 307
 308         value = __raw_readl(base + KS2_DDR3_ONE_BIT_ECC_ERR_CNT_OFFSET);
 309         if (value) {
 310                 printf("1-bit ECC err count: 0x%x\n", value);
 311                 value = __raw_readl(base +
 312                                     KS2_DDR3_ONE_BIT_ECC_ERR_ADDR_LOG_OFFSET);
 313                 printf("1-bit ECC err address log: 0x%x\n", value);
 314         }
 315 }
 316
 317 void ddr3_reset_ddrphy(void)
 318 {
 319         u32 tmp;
 320
 321         /* Assert DDR3A  PHY reset */
 322         tmp = readl(KS2_DDR3APLLCTL1);
 323         tmp |= KS2_DDR3_PLLCTRL_PHY_RESET;
 324         writel(tmp, KS2_DDR3APLLCTL1);
 325
 326         /* wait 10us to catch the reset */
 327         udelay(10);
 328
 329         /* Release DDR3A PHY reset */
 330         tmp = readl(KS2_DDR3APLLCTL1);
 331         tmp &= ~KS2_DDR3_PLLCTRL_PHY_RESET;
 332         __raw_writel(tmp, KS2_DDR3APLLCTL1);
 333 }
 334
 335 #ifdef CONFIG_SOC_K2HK
 336 /**
 337  * ddr3_reset_workaround - reset workaround in case if leveling error
 338  * detected for PG 1.0 and 1.1 k2hk SoCs
 339  */
 340 void ddr3_err_reset_workaround(void)
 341 {
 342         unsigned int tmp;
 343         unsigned int tmp_a;
 344         unsigned int tmp_b;
 345
 346         /*
 347          * Check for PGSR0 error bits of DDR3 PHY.
 348          * Check for WLERR, QSGERR, WLAERR,
 349          * RDERR, WDERR, REERR, WEERR error to see if they are set or not
 350          */
 351         tmp_a = __raw_readl(KS2_DDR3A_DDRPHYC + KS2_DDRPHY_PGSR0_OFFSET);
 352         tmp_b = __raw_readl(KS2_DDR3B_DDRPHYC + KS2_DDRPHY_PGSR0_OFFSET);
 353
 354         if (((tmp_a & 0x0FE00000) != 0) || ((tmp_b & 0x0FE00000) != 0)) {
 355                 printf("DDR Leveling Error Detected!\n");
 356                 printf("DDR3A PGSR0 = 0x%x\n", tmp_a);
 357                 printf("DDR3B PGSR0 = 0x%x\n", tmp_b);
 358
 359                 /*
 360                  * Write Keys to KICK registers to enable writes to registers
 361                  * in boot config space
 362                  */
 363                 __raw_writel(KS2_KICK0_MAGIC, KS2_KICK0);
 364                 __raw_writel(KS2_KICK1_MAGIC, KS2_KICK1);
 365
 366                 /*
 367                  * Move DDR3A Module out of reset isolation by setting
 368                  * MDCTL23[12] = 0
 369                  */
 370                 tmp_a = __raw_readl(KS2_PSC_BASE +
 371                                     PSC_REG_MDCTL(KS2_LPSC_EMIF4F_DDR3A));
 372
 373                 tmp_a = PSC_REG_MDCTL_SET_RESET_ISO(tmp_a, 0);
 374                 __raw_writel(tmp_a, KS2_PSC_BASE +
 375                              PSC_REG_MDCTL(KS2_LPSC_EMIF4F_DDR3A));
 376
 377                 /*
 378                  * Move DDR3B Module out of reset isolation by setting
 379                  * MDCTL24[12] = 0
 380                  */
 381                 tmp_b = __raw_readl(KS2_PSC_BASE +
 382                                     PSC_REG_MDCTL(KS2_LPSC_EMIF4F_DDR3B));
 383                 tmp_b = PSC_REG_MDCTL_SET_RESET_ISO(tmp_b, 0);
 384                 __raw_writel(tmp_b, KS2_PSC_BASE +
 385                              PSC_REG_MDCTL(KS2_LPSC_EMIF4F_DDR3B));
 386
 387                 /*
 388                  * Write 0x5A69 Key to RSTCTRL[15:0] to unlock writes
 389                  * to RSTCTRL and RSTCFG
 390                  */
 391                 tmp = __raw_readl(KS2_RSTCTRL);
 392                 tmp &= KS2_RSTCTRL_MASK;
 393                 tmp |= KS2_RSTCTRL_KEY;
 394                 __raw_writel(tmp, KS2_RSTCTRL);
 395
 396                 /*
 397                  * Set PLL Controller to drive hard reset on SW trigger by
 398                  * setting RSTCFG[13] = 0
 399                  */
 400                 tmp = __raw_readl(KS2_RSTCTRL_RSCFG);
 401                 tmp &= ~KS2_RSTYPE_PLL_SOFT;
 402                 __raw_writel(tmp, KS2_RSTCTRL_RSCFG);
 403
 404                 reset_cpu(0);
 405         }
 406 }
 407 #endif