This patch will enable the support for SPL on iMX6 SabreSD. It tested on SD2 and SD3 mmc port.
It uses mx6dq_dram_iocfg and mx6_dram_cfg for ddr configuration.
Signed-off-by: John Tobias john.tobias.ph@gmail.com --- board/freescale/mx6sabresd/mx6sabresd.c | 187 +++++++++++++++++++++++++++++++- 1 file changed, 185 insertions(+), 2 deletions(-)
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c index 3d81fff..16cfb44 100644 --- a/board/freescale/mx6sabresd/mx6sabresd.c +++ b/board/freescale/mx6sabresd/mx6sabresd.c @@ -27,6 +27,8 @@ #include <i2c.h> #include <power/pmic.h> #include <power/pfuze100_pmic.h> +#include <asm/arch/mx6-ddr.h> + DECLARE_GLOBAL_DATA_PTR;
#define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | \ @@ -55,8 +57,7 @@ DECLARE_GLOBAL_DATA_PTR;
int dram_init(void) { - gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE); - + gd->ram_size = imx_ddr_size(); return 0; }
@@ -607,3 +608,185 @@ int checkboard(void) puts("Board: MX6-SabreSD\n"); return 0; } + +#ifdef CONFIG_SPL_BUILD +#include <spl.h> +#include <libfdt.h> + +#define BOOT_CFG 0x020D8004 +struct fsl_esdhc_cfg spl_usdhc_cfg; + +const struct mx6dq_iomux_ddr_regs mx6_ddr_ioregs = { + .dram_sdclk_0 = 0x00020030, + .dram_sdclk_1 = 0x00020030, + .dram_cas = 0x00020030, + .dram_ras = 0x00020030, + .dram_reset = 0x00020030, + .dram_sdcke0 = 0x00003000, + .dram_sdcke1 = 0x00003000, + .dram_sdba2 = 0x00000000, + .dram_sdodt0 = 0x00003030, + .dram_sdodt1 = 0x00003030, + .dram_sdqs0 = 0x00000030, + .dram_sdqs1 = 0x00000030, + .dram_sdqs2 = 0x00000030, + .dram_sdqs3 = 0x00000030, + .dram_sdqs4 = 0x00000030, + .dram_sdqs5 = 0x00000030, + .dram_sdqs6 = 0x00000030, + .dram_sdqs7 = 0x00000030, + .dram_dqm0 = 0x00020030, + .dram_dqm1 = 0x00020030, + .dram_dqm2 = 0x00020030, + .dram_dqm3 = 0x00020030, + .dram_dqm4 = 0x00020030, + .dram_dqm5 = 0x00020030, + .dram_dqm6 = 0x00020030, + .dram_dqm7 = 0x00020030, +}; + +const struct mx6dq_iomux_grp_regs mx6_grp_ioregs = { + .grp_ddr_type = 0x000C0000, + .grp_ddrmode_ctl = 0x00020000, + .grp_ddrpke = 0x00000000, + .grp_addds = 0x00000030, + .grp_ctlds = 0x00000030, + .grp_ddrmode = 0x00020000, + .grp_b0ds = 0x00000030, + .grp_b1ds = 0x00000030, + .grp_b2ds = 0x00000030, + .grp_b3ds = 0x00000030, + .grp_b4ds = 0x00000030, + .grp_b5ds = 0x00000030, + .grp_b6ds = 0x00000030, + .grp_b7ds = 0x00000030, +}; + +const struct mx6_mmdc_calibration mx6_mmcd_calib = { + .p0_mpwldectrl0 = 0x001F001F, + .p0_mpwldectrl1 = 0x001F001F, + .p1_mpwldectrl0 = 0x00440044, + .p1_mpwldectrl1 = 0x00440044, + .p0_mpdgctrl0 = 0x434B0350, + .p0_mpdgctrl1 = 0x034C0359, + .p1_mpdgctrl0 = 0x434B0350, + .p1_mpdgctrl1 = 0x03650348, + .p0_mprddlctl = 0x4436383B, + .p1_mprddlctl = 0x39393341, + .p0_mpwrdlctl = 0x35373933, + .p1_mpwrdlctl = 0x48254A36, +}; + +static struct mx6_ddr3_cfg mem_ddr = { + .mem_speed = 1600, + .density = 4, + .width = 64, + .banks = 8, + .rowaddr = 14, + .coladdr = 10, + .pagesz = 2, + .trcd = 1375, + .trcmin = 4875, + .trasmin = 3500, +}; + +/* + * This section require the differentiation + * between iMX6 Sabre Families. + * But for now, it will configure only for + * SabreSD. + */ +static void spl_dram_init(void) +{ + struct mx6_ddr_sysinfo sysinfo = { + /* width of data bus:0=16,1=32,2=64 */ + .dsize = mem_ddr.width/32, + /* config for full 4GB range so that get_mem_size() works */ + .cs_density = 32, /* 32Gb per CS */ + /* single chip select */ + .ncs = 2, + .cs1_mirror = 0, + .rtt_wr = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Wr = RZQ/4 */ +#ifdef RTT_NOM_120OHM + .rtt_nom = 2 /*DDR3_RTT_120_OHM*/, /* RTT_Nom = RZQ/2 */ +#else + .rtt_nom = 1 /*DDR3_RTT_60_OHM*/, /* RTT_Nom = RZQ/4 */ +#endif + .walat = 1, /* Write additional latency */ + .ralat = 5, /* Read additional latency */ + .mif3_mode = 3, /* Command prediction working mode */ + .bi_on = 1, /* Bank interleaving enabled */ + .sde_to_rst = 0x10, /* 14 cycles, 200us (JEDEC default) */ + .rst_to_cke = 0x23, /* 33 cycles, 500us (JEDEC default) */ + }; + + mx6dq_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs); + mx6_dram_cfg(&sysinfo, &mx6_mmcd_calib, &mem_ddr); +} + +int spl_board_mmc_init(bd_t *bis) +{ + unsigned reg = readl(BOOT_CFG) >> 11; + /* + * Upon reading BOOT_CFG register the following map is done: + * Bit 11 and 12 of BOOT_CFG register can determine the current + * mmc port + * 0x1 SD1 + * 0x2 SD2 + * 0x3 SD4 + */ + switch (reg & 0x3) { + case 0x1: + imx_iomux_v3_setup_multiple_pads( + usdhc2_pads, ARRAY_SIZE(usdhc2_pads)); + spl_usdhc_cfg.esdhc_base = USDHC2_BASE_ADDR; + spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK); + gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk; + break; + case 0x2: + imx_iomux_v3_setup_multiple_pads( + usdhc3_pads, ARRAY_SIZE(usdhc3_pads)); + spl_usdhc_cfg.esdhc_base = USDHC3_BASE_ADDR; + spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC3_CLK); + gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk; + break; + case 0x3: + imx_iomux_v3_setup_multiple_pads( + usdhc4_pads, ARRAY_SIZE(usdhc4_pads)); + spl_usdhc_cfg.esdhc_base = USDHC4_BASE_ADDR; + spl_usdhc_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC4_CLK); + gd->arch.sdhc_clk = spl_usdhc_cfg.sdhc_clk; + break; + } + + return fsl_esdhc_initialize(bis, &spl_usdhc_cfg); +} + +void board_init_f(ulong dummy) +{ + /* setup AIPS and disable watchdog */ + arch_cpu_init(); + + /* iomux and setup of i2c */ + board_early_init_f(); + + /* setup GP timer */ + timer_init(); + + /* UART clocks enabled and gd valid - init serial console */ + preloader_console_init(); + + /* DDR initialization */ + spl_dram_init(); + + /* Clear the BSS. */ + memset(__bss_start, 0, __bss_end - __bss_start); + + /* load/boot image from boot device */ + board_init_r(NULL, 0); +} + +void reset_cpu(ulong addr) +{ +} +#endif