1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2018 Simone CIANNI <simone.cianni@bticino.it> 4 * Copyright (C) 2018 Raffaele RECALCATI <raffaele.recalcati@bticino.it> 5 * Copyright (C) 2018 Jagan Teki <jagan@amarulasolutions.com> 6 */ 7 8 #include <common.h> 9 #include <spl.h> 10 11 #include <asm/io.h> 12 #include <linux/sizes.h> 13 14 #include <asm/arch/clock.h> 15 #include <asm/arch/crm_regs.h> 16 #include <asm/arch/iomux.h> 17 #include <asm/arch/mx6-ddr.h> 18 #include <asm/arch/mx6-pins.h> 19 #include <asm/arch/sys_proto.h> 20 21 DECLARE_GLOBAL_DATA_PTR; 22 23 #define IMX6SDL_DRIVE_STRENGTH 0x28 24 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED | \ 25 PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST | PAD_CTL_HYS) 26 27 static iomux_v3_cfg_t const uart3_pads[] = { 28 IOMUX_PADS(PAD_EIM_D24__UART3_TX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)), 29 IOMUX_PADS(PAD_EIM_D25__UART3_RX_DATA | MUX_PAD_CTRL(UART_PAD_CTRL)), 30 }; 31 32 #ifdef CONFIG_SPL_OS_BOOT 33 int spl_start_uboot(void) 34 { 35 /* break into full u-boot on 'c' */ 36 if (serial_tstc() && serial_getc() == 'c') 37 return 1; 38 39 return 0; 40 } 41 #endif 42 43 struct mx6sdl_iomux_ddr_regs mx6sdl_ddr_ioregs = { 44 .dram_sdclk_0 = IMX6SDL_DRIVE_STRENGTH, 45 .dram_sdclk_1 = IMX6SDL_DRIVE_STRENGTH, 46 .dram_cas = IMX6SDL_DRIVE_STRENGTH, 47 .dram_ras = IMX6SDL_DRIVE_STRENGTH, 48 .dram_reset = IMX6SDL_DRIVE_STRENGTH, 49 .dram_sdcke0 = IMX6SDL_DRIVE_STRENGTH, 50 .dram_sdcke1 = IMX6SDL_DRIVE_STRENGTH, 51 .dram_sdba2 = 0x00000000, 52 .dram_sdodt0 = IMX6SDL_DRIVE_STRENGTH, 53 .dram_sdodt1 = IMX6SDL_DRIVE_STRENGTH, 54 .dram_sdqs0 = IMX6SDL_DRIVE_STRENGTH, 55 .dram_sdqs1 = IMX6SDL_DRIVE_STRENGTH, 56 .dram_sdqs2 = IMX6SDL_DRIVE_STRENGTH, 57 .dram_sdqs3 = IMX6SDL_DRIVE_STRENGTH, 58 .dram_sdqs4 = IMX6SDL_DRIVE_STRENGTH, 59 .dram_sdqs5 = IMX6SDL_DRIVE_STRENGTH, 60 .dram_sdqs6 = IMX6SDL_DRIVE_STRENGTH, 61 .dram_sdqs7 = IMX6SDL_DRIVE_STRENGTH, 62 .dram_dqm0 = IMX6SDL_DRIVE_STRENGTH, 63 .dram_dqm1 = IMX6SDL_DRIVE_STRENGTH, 64 .dram_dqm2 = IMX6SDL_DRIVE_STRENGTH, 65 .dram_dqm3 = IMX6SDL_DRIVE_STRENGTH, 66 .dram_dqm4 = IMX6SDL_DRIVE_STRENGTH, 67 .dram_dqm5 = IMX6SDL_DRIVE_STRENGTH, 68 .dram_dqm6 = IMX6SDL_DRIVE_STRENGTH, 69 .dram_dqm7 = IMX6SDL_DRIVE_STRENGTH, 70 }; 71 72 struct mx6sdl_iomux_grp_regs mx6sdl_grp_ioregs = { 73 .grp_ddr_type = 0x000c0000, 74 .grp_ddrmode_ctl = 0x00020000, 75 .grp_ddrpke = 0x00000000, 76 .grp_addds = IMX6SDL_DRIVE_STRENGTH, 77 .grp_ctlds = IMX6SDL_DRIVE_STRENGTH, 78 .grp_ddrmode = 0x00020000, 79 .grp_b0ds = IMX6SDL_DRIVE_STRENGTH, 80 .grp_b1ds = IMX6SDL_DRIVE_STRENGTH, 81 .grp_b2ds = IMX6SDL_DRIVE_STRENGTH, 82 .grp_b3ds = IMX6SDL_DRIVE_STRENGTH, 83 .grp_b4ds = IMX6SDL_DRIVE_STRENGTH, 84 .grp_b5ds = IMX6SDL_DRIVE_STRENGTH, 85 .grp_b6ds = IMX6SDL_DRIVE_STRENGTH, 86 .grp_b7ds = IMX6SDL_DRIVE_STRENGTH, 87 }; 88 89 static struct mx6_ddr3_cfg mt41k128m16jt_125 = { 90 .mem_speed = 1600, 91 .density = 4, 92 .width = 32, 93 .banks = 8, 94 .rowaddr = 14, 95 .coladdr = 10, 96 .pagesz = 2, 97 .trcd = 1375, 98 .trcmin = 4875, 99 .trasmin = 3500, 100 .SRT = 0, 101 }; 102 103 static struct mx6_mmdc_calibration mx6dl_mmdc_calib = { 104 .p0_mpwldectrl0 = 0x0042004b, 105 .p0_mpwldectrl1 = 0x0038003c, 106 .p0_mpdgctrl0 = 0x42340230, 107 .p0_mpdgctrl1 = 0x0228022c, 108 .p0_mprddlctl = 0x42444646, 109 .p0_mpwrdlctl = 0x38382e2e, 110 }; 111 112 static struct mx6_ddr_sysinfo mem_dl = { 113 .dsize = 1, 114 .cs1_mirror = 0, 115 /* config for full 4GB range so that get_mem_size() works */ 116 .cs_density = 32, 117 .ncs = 1, 118 .bi_on = 1, 119 .rtt_nom = 1, 120 .rtt_wr = 1, 121 .ralat = 5, 122 .walat = 0, 123 .mif3_mode = 3, 124 .rst_to_cke = 0x23, 125 .sde_to_rst = 0x10, 126 .refsel = 1, 127 .refr = 7, 128 }; 129 130 static void spl_dram_init(void) 131 { 132 mx6sdl_dram_iocfg(64, &mx6sdl_ddr_ioregs, &mx6sdl_grp_ioregs); 133 mx6_dram_cfg(&mem_dl, &mx6dl_mmdc_calib, &mt41k128m16jt_125); 134 135 udelay(100); 136 } 137 138 static void ccgr_init(void) 139 { 140 struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR; 141 142 writel(0x00003f3f, &ccm->CCGR0); 143 writel(0x0030fc00, &ccm->CCGR1); 144 writel(0x000fc000, &ccm->CCGR2); 145 writel(0x3f300000, &ccm->CCGR3); 146 writel(0xff00f300, &ccm->CCGR4); 147 writel(0x0f0000c3, &ccm->CCGR5); 148 writel(0x000003cc, &ccm->CCGR6); 149 } 150 151 void board_init_f(ulong dummy) 152 { 153 ccgr_init(); 154 155 /* setup AIPS and disable watchdog */ 156 arch_cpu_init(); 157 158 gpr_init(); 159 160 /* iomux */ 161 SETUP_IOMUX_PADS(uart3_pads); 162 163 /* setup GP timer */ 164 timer_init(); 165 166 /* UART clocks enabled and gd valid - init serial console */ 167 preloader_console_init(); 168 169 /* DDR initialization */ 170 spl_dram_init(); 171 } 172