board/compulab/cm_fx6/spl.c

   1 /*
   2  * SPL specific code for Compulab CM-FX6 board
   3  *
   4  * Copyright (C) 2014, Compulab Ltd - http://compulab.co.il/
   5  *
   6  * Author: Nikita Kiryanov <nikita@compulab.co.il>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <spl.h>
  13 #include <asm/io.h>
  14 #include <asm/gpio.h>
  15 #include <asm/arch/mx6-ddr.h>
  16 #include <asm/arch/clock.h>
  17 #include <asm/arch/sys_proto.h>
  18 #include <asm/arch/crm_regs.h>
  19 #include <asm/imx-common/iomux-v3.h>
  20 #include <fsl_esdhc.h>
  21 #include "common.h"
  22
  23 DECLARE_GLOBAL_DATA_PTR;
  24
  25 enum ddr_config {
  26         DDR_16BIT_256MB,
  27         DDR_32BIT_512MB,
  28         DDR_32BIT_1GB,
  29         DDR_64BIT_1GB,
  30         DDR_64BIT_2GB,
  31         DDR_64BIT_4GB,
  32         DDR_UNKNOWN,
  33 };
  34
  35 /*
  36  * Below DRAM_RESET[DDR_SEL] = 0 which is incorrect according to
  37  * Freescale QRM, but this is exactly the value used by the automatic
  38  * calibration script and it works also in all our tests, so we leave
  39  * it as is at this point.
  40  */
  41 #define CM_FX6_DDR_IOMUX_CFG \
  42         .dram_sdqs0     = 0x00000038, \
  43         .dram_sdqs1     = 0x00000038, \
  44         .dram_sdqs2     = 0x00000038, \
  45         .dram_sdqs3     = 0x00000038, \
  46         .dram_sdqs4     = 0x00000038, \
  47         .dram_sdqs5     = 0x00000038, \
  48         .dram_sdqs6     = 0x00000038, \
  49         .dram_sdqs7     = 0x00000038, \
  50         .dram_dqm0      = 0x00000038, \
  51         .dram_dqm1      = 0x00000038, \
  52         .dram_dqm2      = 0x00000038, \
  53         .dram_dqm3      = 0x00000038, \
  54         .dram_dqm4      = 0x00000038, \
  55         .dram_dqm5      = 0x00000038, \
  56         .dram_dqm6      = 0x00000038, \
  57         .dram_dqm7      = 0x00000038, \
  58         .dram_cas       = 0x00000038, \
  59         .dram_ras       = 0x00000038, \
  60         .dram_sdclk_0   = 0x00000038, \
  61         .dram_sdclk_1   = 0x00000038, \
  62         .dram_sdcke0    = 0x00003000, \
  63         .dram_sdcke1    = 0x00003000, \
  64         .dram_reset     = 0x00000038, \
  65         .dram_sdba2     = 0x00000000, \
  66         .dram_sdodt0    = 0x00000038, \
  67         .dram_sdodt1    = 0x00000038,
  68
  69 #define CM_FX6_GPR_IOMUX_CFG \
  70         .grp_b0ds       = 0x00000038, \
  71         .grp_b1ds       = 0x00000038, \
  72         .grp_b2ds       = 0x00000038, \
  73         .grp_b3ds       = 0x00000038, \
  74         .grp_b4ds       = 0x00000038, \
  75         .grp_b5ds       = 0x00000038, \
  76         .grp_b6ds       = 0x00000038, \
  77         .grp_b7ds       = 0x00000038, \
  78         .grp_addds      = 0x00000038, \
  79         .grp_ddrmode_ctl = 0x00020000, \
  80         .grp_ddrpke     = 0x00000000, \
  81         .grp_ddrmode    = 0x00020000, \
  82         .grp_ctlds      = 0x00000038, \
  83         .grp_ddr_type   = 0x000C0000,
  84
  85 static struct mx6sdl_iomux_ddr_regs ddr_iomux_s = { CM_FX6_DDR_IOMUX_CFG };
  86 static struct mx6sdl_iomux_grp_regs grp_iomux_s = { CM_FX6_GPR_IOMUX_CFG };
  87 static struct mx6dq_iomux_ddr_regs ddr_iomux_q = { CM_FX6_DDR_IOMUX_CFG };
  88 static struct mx6dq_iomux_grp_regs grp_iomux_q = { CM_FX6_GPR_IOMUX_CFG };
  89
  90 static struct mx6_mmdc_calibration cm_fx6_calib_s = {
  91         .p0_mpwldectrl0 = 0x005B0061,
  92         .p0_mpwldectrl1 = 0x004F0055,
  93         .p0_mpdgctrl0   = 0x0314030C,
  94         .p0_mpdgctrl1   = 0x025C0268,
  95         .p0_mprddlctl   = 0x42464646,
  96         .p0_mpwrdlctl   = 0x36322C34,
  97 };
  98
  99 static struct mx6_ddr_sysinfo cm_fx6_sysinfo_s = {
 100         .cs1_mirror     = 1,
 101         .cs_density     = 16,
 102         .bi_on          = 1,
 103         .rtt_nom        = 1,
 104         .rtt_wr         = 0,
 105         .ralat          = 5,
 106         .walat          = 1,
 107         .mif3_mode      = 3,
 108         .rst_to_cke     = 0x23,
 109         .sde_to_rst     = 0x10,
 110 };
 111
 112 static struct mx6_ddr3_cfg cm_fx6_ddr3_cfg_s = {
 113         .mem_speed      = 800,
 114         .density        = 4,
 115         .rowaddr        = 14,
 116         .coladdr        = 10,
 117         .pagesz         = 2,
 118         .trcd           = 1800,
 119         .trcmin         = 5200,
 120         .trasmin        = 3600,
 121         .SRT            = 0,
 122 };
 123
 124 static void spl_mx6s_dram_init(enum ddr_config dram_config, bool reset)
 125 {
 126         if (reset)
 127                 ((struct mmdc_p_regs *)MX6_MMDC_P0_MDCTL)->mdmisc = 2;
 128
 129         switch (dram_config) {
 130         case DDR_16BIT_256MB:
 131                 cm_fx6_sysinfo_s.dsize = 0;
 132                 cm_fx6_sysinfo_s.ncs = 1;
 133                 break;
 134         case DDR_32BIT_512MB:
 135                 cm_fx6_sysinfo_s.dsize = 1;
 136                 cm_fx6_sysinfo_s.ncs = 1;
 137                 break;
 138         case DDR_32BIT_1GB:
 139                 cm_fx6_sysinfo_s.dsize = 1;
 140                 cm_fx6_sysinfo_s.ncs = 2;
 141                 break;
 142         default:
 143                 puts("Tried to setup invalid DDR configuration\n");
 144                 hang();
 145         }
 146
 147         mx6_dram_cfg(&cm_fx6_sysinfo_s, &cm_fx6_calib_s, &cm_fx6_ddr3_cfg_s);
 148         udelay(100);
 149 }
 150
 151 static struct mx6_mmdc_calibration cm_fx6_calib_q = {
 152         .p0_mpwldectrl0 = 0x00630068,
 153         .p0_mpwldectrl1 = 0x0068005D,
 154         .p0_mpdgctrl0   = 0x04140428,
 155         .p0_mpdgctrl1   = 0x037C037C,
 156         .p0_mprddlctl   = 0x3C30303A,
 157         .p0_mpwrdlctl   = 0x3A344038,
 158         .p1_mpwldectrl0 = 0x0035004C,
 159         .p1_mpwldectrl1 = 0x00170026,
 160         .p1_mpdgctrl0   = 0x0374037C,
 161         .p1_mpdgctrl1   = 0x0350032C,
 162         .p1_mprddlctl   = 0x30322A3C,
 163         .p1_mpwrdlctl   = 0x48304A3E,
 164 };
 165
 166 static struct mx6_ddr_sysinfo cm_fx6_sysinfo_q = {
 167         .cs_density     = 16,
 168         .cs1_mirror     = 1,
 169         .bi_on          = 1,
 170         .rtt_nom        = 1,
 171         .rtt_wr         = 0,
 172         .ralat          = 5,
 173         .walat          = 1,
 174         .mif3_mode      = 3,
 175         .rst_to_cke     = 0x23,
 176         .sde_to_rst     = 0x10,
 177 };
 178
 179 static struct mx6_ddr3_cfg cm_fx6_ddr3_cfg_q = {
 180         .mem_speed      = 1066,
 181         .density        = 4,
 182         .rowaddr        = 14,
 183         .coladdr        = 10,
 184         .pagesz         = 2,
 185         .trcd           = 1324,
 186         .trcmin         = 59500,
 187         .trasmin        = 9750,
 188         .SRT            = 0,
 189 };
 190
 191 static void spl_mx6q_dram_init(enum ddr_config dram_config, bool reset)
 192 {
 193         if (reset)
 194                 ((struct mmdc_p_regs *)MX6_MMDC_P0_MDCTL)->mdmisc = 2;
 195
 196         cm_fx6_ddr3_cfg_q.rowaddr = 14;
 197         switch (dram_config) {
 198         case DDR_16BIT_256MB:
 199                 cm_fx6_sysinfo_q.dsize = 0;
 200                 cm_fx6_sysinfo_q.ncs = 1;
 201                 break;
 202         case DDR_32BIT_512MB:
 203                 cm_fx6_sysinfo_q.dsize = 1;
 204                 cm_fx6_sysinfo_q.ncs = 1;
 205                 break;
 206         case DDR_64BIT_1GB:
 207                 cm_fx6_sysinfo_q.dsize = 2;
 208                 cm_fx6_sysinfo_q.ncs = 1;
 209                 break;
 210         case DDR_64BIT_2GB:
 211                 cm_fx6_sysinfo_q.dsize = 2;
 212                 cm_fx6_sysinfo_q.ncs = 2;
 213                 break;
 214         case DDR_64BIT_4GB:
 215                 cm_fx6_sysinfo_q.dsize = 2;
 216                 cm_fx6_sysinfo_q.ncs = 2;
 217                 cm_fx6_ddr3_cfg_q.rowaddr = 15;
 218                 break;
 219         default:
 220                 puts("Tried to setup invalid DDR configuration\n");
 221                 hang();
 222         }
 223
 224         mx6_dram_cfg(&cm_fx6_sysinfo_q, &cm_fx6_calib_q, &cm_fx6_ddr3_cfg_q);
 225         udelay(100);
 226 }
 227
 228 static int cm_fx6_spl_dram_init(void)
 229 {
 230         unsigned long bank1_size, bank2_size;
 231
 232         switch (get_cpu_type()) {
 233         case MXC_CPU_MX6SOLO:
 234                 mx6sdl_dram_iocfg(64, &ddr_iomux_s, &grp_iomux_s);
 235
 236                 spl_mx6s_dram_init(DDR_32BIT_1GB, false);
 237                 bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
 238                 bank2_size = get_ram_size((long int *)PHYS_SDRAM_2, 0x80000000);
 239                 if (bank1_size == 0x20000000) {
 240                         if (bank2_size == 0x20000000)
 241                                 return 0;
 242
 243                         spl_mx6s_dram_init(DDR_32BIT_512MB, true);
 244                         return 0;
 245                 }
 246
 247                 spl_mx6s_dram_init(DDR_16BIT_256MB, true);
 248                 bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
 249                 if (bank1_size == 0x10000000)
 250                         return 0;
 251
 252                 break;
 253         case MXC_CPU_MX6D:
 254         case MXC_CPU_MX6Q:
 255                 mx6dq_dram_iocfg(64, &ddr_iomux_q, &grp_iomux_q);
 256
 257                 spl_mx6q_dram_init(DDR_64BIT_4GB, false);
 258                 bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
 259                 if (bank1_size == 0x80000000)
 260                         return 0;
 261
 262                 if (bank1_size == 0x40000000) {
 263                         bank2_size = get_ram_size((long int *)PHYS_SDRAM_2,
 264                                                                 0x80000000);
 265                         if (bank2_size == 0x40000000) {
 266                                 /* Don't do a full reset here */
 267                                 spl_mx6q_dram_init(DDR_64BIT_2GB, false);
 268                         } else {
 269                                 spl_mx6q_dram_init(DDR_64BIT_1GB, true);
 270                         }
 271
 272                         return 0;
 273                 }
 274
 275                 spl_mx6q_dram_init(DDR_32BIT_512MB, true);
 276                 bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
 277                 if (bank1_size == 0x20000000)
 278                         return 0;
 279
 280                 spl_mx6q_dram_init(DDR_16BIT_256MB, true);
 281                 bank1_size = get_ram_size((long int *)PHYS_SDRAM_1, 0x80000000);
 282                 if (bank1_size == 0x10000000)
 283                         return 0;
 284
 285                 break;
 286         }
 287
 288         return -1;
 289 }
 290
 291 static iomux_v3_cfg_t const uart4_pads[] = {
 292         IOMUX_PADS(PAD_KEY_COL0__UART4_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
 293         IOMUX_PADS(PAD_KEY_ROW0__UART4_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)),
 294 };
 295
 296 static void cm_fx6_setup_uart(void)
 297 {
 298         SETUP_IOMUX_PADS(uart4_pads);
 299         enable_uart_clk(1);
 300 }
 301
 302 #ifdef CONFIG_SPL_SPI_SUPPORT
 303 static void cm_fx6_setup_ecspi(void)
 304 {
 305         cm_fx6_set_ecspi_iomux();
 306         enable_cspi_clock(1, 0);
 307 }
 308 #else
 309 static void cm_fx6_setup_ecspi(void) { }
 310 #endif
 311
 312 void board_init_f(ulong dummy)
 313 {
 314         struct mxc_ccm_reg *mxc_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 315
 316         gd = &gdata;
 317         /*
 318          * We don't use DMA in SPL, but we do need it in U-Boot. U-Boot
 319          * initializes DMA very early (before all board code), so the only
 320          * opportunity we have to initialize APBHDMA clocks is in SPL.
 321          */
 322         setbits_le32(&mxc_ccm->CCGR0, MXC_CCM_CCGR0_APBHDMA_MASK);
 323         enable_usdhc_clk(1, 2);
 324
 325         arch_cpu_init();
 326         timer_init();
 327         cm_fx6_setup_ecspi();
 328         cm_fx6_setup_uart();
 329         get_clocks();
 330         preloader_console_init();
 331         gpio_direction_output(CM_FX6_GREEN_LED, 1);
 332         if (cm_fx6_spl_dram_init()) {
 333                 puts("!!!ERROR!!! DRAM detection failed!!!\n");
 334                 hang();
 335         }
 336
 337         memset(__bss_start, 0, __bss_end - __bss_start);
 338         board_init_r(NULL, 0);
 339 }
 340
 341 void spl_board_init(void)
 342 {
 343         u32 boot_device = spl_boot_device();
 344
 345         if (boot_device == BOOT_DEVICE_SPI)
 346                 puts("Booting from SPI flash\n");
 347         else if (boot_device == BOOT_DEVICE_MMC1)
 348                 puts("Booting from MMC\n");
 349         else
 350                 puts("Unknown boot device\n");
 351 }
 352
 353 #ifdef CONFIG_SPL_MMC_SUPPORT
 354 static struct fsl_esdhc_cfg usdhc_cfg = {
 355         .esdhc_base = USDHC3_BASE_ADDR,
 356         .max_bus_width = 4,
 357 };
 358
 359 int board_mmc_init(bd_t *bis)
 360 {
 361         cm_fx6_set_usdhc_iomux();
 362
 363         usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK);
 364
 365         return fsl_esdhc_initialize(bis, &usdhc_cfg);
 366 }
 367 #endif