board/liebherr/display5/spl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 DENX Software Engineering
   4  * Lukasz Majewski, DENX Software Engineering, lukma@denx.de
   5  */
   6
   7 #include <common.h>
   8 #include <spl.h>
   9 #include <linux/libfdt.h>
  10 #include <asm/io.h>
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/mx6-ddr.h>
  13 #include <asm/arch/mx6-pins.h>
  14 #include "asm/arch/crm_regs.h"
  15 #include <asm/arch/sys_proto.h>
  16 #include <asm/arch/imx-regs.h>
  17 #include "asm/arch/iomux.h"
  18 #include <asm/mach-imx/iomux-v3.h>
  19 #include <asm/gpio.h>
  20 #include <environment.h>
  21 #include <fsl_esdhc_imx.h>
  22 #include <netdev.h>
  23 #include <bootcount.h>
  24 #include <watchdog.h>
  25 #include "common.h"
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static const struct mx6dq_iomux_ddr_regs mx6_ddr_ioregs = {
  30         .dram_sdclk_0 = 0x00000030,
  31         .dram_sdclk_1 = 0x00000030,
  32         .dram_cas = 0x00000030,
  33         .dram_ras = 0x00000030,
  34         .dram_reset = 0x00000030,
  35         .dram_sdcke0 = 0x00003000,
  36         .dram_sdcke1 = 0x00003000,
  37         .dram_sdba2 = 0x00000000,
  38         .dram_sdodt0 = 0x00000030,
  39         .dram_sdodt1 = 0x00000030,
  40
  41         .dram_sdqs0 = 0x00000030,
  42         .dram_sdqs1 = 0x00000030,
  43         .dram_sdqs2 = 0x00000030,
  44         .dram_sdqs3 = 0x00000030,
  45         .dram_sdqs4 = 0x00000030,
  46         .dram_sdqs5 = 0x00000030,
  47         .dram_sdqs6 = 0x00000030,
  48         .dram_sdqs7 = 0x00000030,
  49
  50         .dram_dqm0 = 0x00000030,
  51         .dram_dqm1 = 0x00000030,
  52         .dram_dqm2 = 0x00000030,
  53         .dram_dqm3 = 0x00000030,
  54         .dram_dqm4 = 0x00000030,
  55         .dram_dqm5 = 0x00000030,
  56         .dram_dqm6 = 0x00000030,
  57         .dram_dqm7 = 0x00000030,
  58 };
  59
  60 static const struct mx6dq_iomux_grp_regs mx6_grp_ioregs = {
  61         .grp_ddr_type = 0x000c0000,
  62         .grp_ddrmode_ctl = 0x00020000,
  63         .grp_ddrpke = 0x00000000,
  64         .grp_addds = 0x00000030,
  65         .grp_ctlds = 0x00000030,
  66         .grp_ddrmode = 0x00020000,
  67         .grp_b0ds = 0x00000030,
  68         .grp_b1ds = 0x00000030,
  69         .grp_b2ds = 0x00000030,
  70         .grp_b3ds = 0x00000030,
  71         .grp_b4ds = 0x00000030,
  72         .grp_b5ds = 0x00000030,
  73         .grp_b6ds = 0x00000030,
  74         .grp_b7ds = 0x00000030,
  75 };
  76
  77 /* 4x128Mx16.cfg */
  78 static const struct mx6_mmdc_calibration mx6_4x256mx16_mmdc_calib = {
  79         .p0_mpwldectrl0 = 0x002D0028,
  80         .p0_mpwldectrl1 = 0x0032002D,
  81         .p1_mpwldectrl0 = 0x00210036,
  82         .p1_mpwldectrl1 = 0x0019002E,
  83         .p0_mpdgctrl0 = 0x4349035C,
  84         .p0_mpdgctrl1 = 0x0348033D,
  85         .p1_mpdgctrl0 = 0x43550362,
  86         .p1_mpdgctrl1 = 0x03520316,
  87         .p0_mprddlctl = 0x41393940,
  88         .p1_mprddlctl = 0x3F3A3C47,
  89         .p0_mpwrdlctl = 0x413A423A,
  90         .p1_mpwrdlctl = 0x4042483E,
  91 };
  92
  93 /* MT41K128M16JT-125 (2Gb density) */
  94 static const struct mx6_ddr3_cfg mt41k128m16jt_125 = {
  95         .mem_speed = 1600,
  96         .density = 2,
  97         .width = 16,
  98         .banks = 8,
  99         .rowaddr = 14,
 100         .coladdr = 10,
 101         .pagesz = 2,
 102         .trcd = 1375,
 103         .trcmin = 4875,
 104         .trasmin = 3500,
 105 };
 106
 107 static void ccgr_init(void)
 108 {
 109         struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
 110
 111         writel(0x00C03F3F, &ccm->CCGR0);
 112         writel(0x0030FC3F, &ccm->CCGR1);
 113         writel(0x0FFFCFC0, &ccm->CCGR2);
 114         writel(0x3FF00000, &ccm->CCGR3);
 115         writel(0x00FFF300, &ccm->CCGR4);
 116         writel(0x0F0000C3, &ccm->CCGR5);
 117         writel(0x000003FF, &ccm->CCGR6);
 118 }
 119
 120 #ifdef CONFIG_MX6_DDRCAL
 121 static void spl_dram_print_cal(struct mx6_ddr_sysinfo const *sysinfo)
 122 {
 123         struct mx6_mmdc_calibration calibration = {0};
 124
 125         mmdc_read_calibration(sysinfo, &calibration);
 126
 127         debug(".p0_mpdgctrl0\t= 0x%08X\n", calibration.p0_mpdgctrl0);
 128         debug(".p0_mpdgctrl1\t= 0x%08X\n", calibration.p0_mpdgctrl1);
 129         debug(".p0_mprddlctl\t= 0x%08X\n", calibration.p0_mprddlctl);
 130         debug(".p0_mpwrdlctl\t= 0x%08X\n", calibration.p0_mpwrdlctl);
 131         debug(".p0_mpwldectrl0\t= 0x%08X\n", calibration.p0_mpwldectrl0);
 132         debug(".p0_mpwldectrl1\t= 0x%08X\n", calibration.p0_mpwldectrl1);
 133         debug(".p1_mpdgctrl0\t= 0x%08X\n", calibration.p1_mpdgctrl0);
 134         debug(".p1_mpdgctrl1\t= 0x%08X\n", calibration.p1_mpdgctrl1);
 135         debug(".p1_mprddlctl\t= 0x%08X\n", calibration.p1_mprddlctl);
 136         debug(".p1_mpwrdlctl\t= 0x%08X\n", calibration.p1_mpwrdlctl);
 137         debug(".p1_mpwldectrl0\t= 0x%08X\n", calibration.p1_mpwldectrl0);
 138         debug(".p1_mpwldectrl1\t= 0x%08X\n", calibration.p1_mpwldectrl1);
 139 }
 140
 141 static void spl_dram_perform_cal(struct mx6_ddr_sysinfo const *sysinfo)
 142 {
 143         int ret;
 144
 145         /* Perform DDR DRAM calibration */
 146         udelay(100);
 147         ret = mmdc_do_write_level_calibration(sysinfo);
 148         if (ret) {
 149                 printf("DDR: Write level calibration error [%d]\n", ret);
 150                 return;
 151         }
 152
 153         ret = mmdc_do_dqs_calibration(sysinfo);
 154         if (ret) {
 155                 printf("DDR: DQS calibration error [%d]\n", ret);
 156                 return;
 157         }
 158
 159         spl_dram_print_cal(sysinfo);
 160 }
 161 #endif /* CONFIG_MX6_DDRCAL */
 162
 163 static void spl_dram_init(void)
 164 {
 165         struct mx6_ddr_sysinfo sysinfo = {
 166                 /* width of data bus:0=16,1=32,2=64 */
 167                 .dsize = 2,
 168                 /* config for full 4GB range so that get_mem_size() works */
 169                 .cs_density = 32, /* 32Gb per CS */
 170                 /* single chip select */
 171                 .ncs = 1,
 172                 .cs1_mirror = 0,
 173                 .rtt_wr = 1 /*DDR3_RTT_60_OHM*/,        /* RTT_Wr = RZQ/4 */
 174                 .rtt_nom = 2 /*DDR3_RTT_120_OHM*/,      /* RTT_Nom = RZQ/2 */
 175                 .walat = 1,     /* Write additional latency */
 176                 .ralat = 5,     /* Read additional latency */
 177                 .mif3_mode = 3, /* Command prediction working mode */
 178                 .bi_on = 1,     /* Bank interleaving enabled */
 179                 .sde_to_rst = 0x10,     /* 14 cycles, 200us (JEDEC default) */
 180                 .rst_to_cke = 0x23,     /* 33 cycles, 500us (JEDEC default) */
 181                 .pd_fast_exit = 1, /* enable precharge power-down fast exit */
 182                 .ddr_type = DDR_TYPE_DDR3,
 183                 .refsel = 1,    /* Refresh cycles at 32KHz */
 184                 .refr = 7,      /* 8 refresh commands per refresh cycle */
 185         };
 186
 187         mx6dq_dram_iocfg(64, &mx6_ddr_ioregs, &mx6_grp_ioregs);
 188         mx6_dram_cfg(&sysinfo, &mx6_4x256mx16_mmdc_calib, &mt41k128m16jt_125);
 189
 190 #ifdef CONFIG_MX6_DDRCAL
 191         spl_dram_perform_cal(&sysinfo);
 192 #endif
 193 }
 194
 195 #ifdef CONFIG_SPL_SPI_SUPPORT
 196 static void displ5_init_ecspi(void)
 197 {
 198         displ5_set_iomux_ecspi_spl();
 199         enable_spi_clk(1, 1);
 200 }
 201 #else
 202 static inline void displ5_init_ecspi(void) { }
 203 #endif
 204
 205 #ifdef CONFIG_SPL_MMC_SUPPORT
 206 static struct fsl_esdhc_cfg usdhc_cfg = {
 207         .esdhc_base = USDHC4_BASE_ADDR,
 208         .max_bus_width = 8,
 209 };
 210
 211 int board_mmc_init(bd_t *bd)
 212 {
 213         displ5_set_iomux_usdhc_spl();
 214
 215         usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK);
 216         gd->arch.sdhc_clk = usdhc_cfg.sdhc_clk;
 217
 218         return fsl_esdhc_initialize(bd, &usdhc_cfg);
 219 }
 220 #endif
 221
 222 void board_init_f(ulong dummy)
 223 {
 224         ccgr_init();
 225
 226         arch_cpu_init();
 227
 228         gpr_init();
 229
 230         /* setup GP timer */
 231         timer_init();
 232
 233         displ5_set_iomux_uart_spl();
 234
 235         /* UART clocks enabled and gd valid - init serial console */
 236         preloader_console_init();
 237
 238         displ5_init_ecspi();
 239
 240         /* DDR initialization */
 241         spl_dram_init();
 242
 243         /* Clear the BSS. */
 244         memset(__bss_start, 0, __bss_end - __bss_start);
 245
 246         displ5_set_iomux_misc_spl();
 247
 248         /* Initialize and reset WDT in SPL */
 249         hw_watchdog_init();
 250         WATCHDOG_RESET();
 251
 252         /* load/boot image from boot device */
 253         board_init_r(NULL, 0);
 254 }
 255
 256 #define EM_PAD IMX_GPIO_NR(3, 29)
 257 int board_check_emergency_pad(void)
 258 {
 259         int ret;
 260
 261         ret = gpio_direction_input(EM_PAD);
 262         if (ret)
 263                 return ret;
 264
 265         return !gpio_get_value(EM_PAD);
 266 }
 267
 268 void board_boot_order(u32 *spl_boot_list)
 269 {
 270         /* Default boot sequence SPI -> MMC */
 271         spl_boot_list[0] = spl_boot_device();
 272         spl_boot_list[1] = BOOT_DEVICE_MMC1;
 273         spl_boot_list[2] = BOOT_DEVICE_UART;
 274         spl_boot_list[3] = BOOT_DEVICE_NONE;
 275
 276         /*
 277          * In case of emergency PAD pressed, we always boot
 278          * to proper u-boot and perform recovery tasks there.
 279          */
 280         if (board_check_emergency_pad())
 281                 return;
 282
 283 #ifdef CONFIG_SPL_ENV_SUPPORT
 284         /* 'fastboot' */
 285         const char *s;
 286
 287         if (env_init() || env_load())
 288                 return;
 289
 290         s = env_get("BOOT_FROM");
 291         if (s && !bootcount_error() && strcmp(s, "ACTIVE") == 0) {
 292                 spl_boot_list[0] = BOOT_DEVICE_MMC1;
 293                 spl_boot_list[1] = spl_boot_device();
 294         }
 295 #endif
 296 }
 297
 298 void reset_cpu(ulong addr) {}
 299
 300 #ifdef CONFIG_SPL_LOAD_FIT
 301 int board_fit_config_name_match(const char *name)
 302 {
 303         return 0;
 304 }
 305 #endif
 306
 307 #ifdef CONFIG_SPL_OS_BOOT
 308 /* Return: 1 - boot to U-Boot. 0 - boot OS (falcon mode) */
 309 int spl_start_uboot(void)
 310 {
 311         /* break into full u-boot on 'c' */
 312         if (serial_tstc() && serial_getc() == 'c')
 313                 return 1;
 314
 315 #ifdef CONFIG_SPL_ENV_SUPPORT
 316         if (env_get_yesno("boot_os") != 1)
 317                 return 1;
 318 #endif
 319         return 0;
 320 }
 321 #endif