/* * For clock initialization, see chapter 3 of the "MCIMX27 Multimedia * Applications Processor Reference Manual, Rev. 0.2". * */ #include <common.h> #include <init.h> #include <io.h> #include <config.h> #include <asm/barebox-arm.h> #include <asm/barebox-arm-head.h> #include <mach/imx27-regs.h> #include <mach/imx-pll.h> #include <mach/esdctl.h> #include <mach/imx-nand.h> enum { PHYCARD_MICRON_64MB, PHYCARD_MICRON_128MB, }; #define ESDCTL0_VAL_64MB (ESDCTL0_SDE | ESDCTL0_ROW13 | ESDCTL0_COL9) #define ESDCFG0_VAL_64MB 0x00696429 #define ESDCTL0_VAL_128MB (ESDCTL0_SDE | ESDCTL0_ROW13 | ESDCTL0_COL10) #define ESDCFG0_VAL_128MB 0x006ac73a static void sdram_init(int sdram) { int i; unsigned esdcfg, esdctl; if (sdram == PHYCARD_MICRON_64MB) { esdcfg = ESDCFG0_VAL_64MB; esdctl = ESDCTL0_VAL_64MB; } else if (sdram == PHYCARD_MICRON_128MB) { esdcfg = ESDCFG0_VAL_128MB; esdctl = ESDCTL0_VAL_128MB; } else { hang(); } /* * DDR on CSD0 */ /* Enable DDR SDRAM operation */ writel(0x00000008, MX27_ESDCTL_BASE_ADDR + IMX_ESDMISC); /* Set the driving strength */ writel(0x55555555, MX27_SYSCTRL_BASE_ADDR + MX27_DSCR(3)); writel(0x55555555, MX27_SYSCTRL_BASE_ADDR + MX27_DSCR(5)); writel(0x55555555, MX27_SYSCTRL_BASE_ADDR + MX27_DSCR(6)); writel(0x00005005, MX27_SYSCTRL_BASE_ADDR + MX27_DSCR(7)); writel(0x15555555, MX27_SYSCTRL_BASE_ADDR + MX27_DSCR(8)); /* Initial reset */ writel(0x00000004, MX27_ESDCTL_BASE_ADDR + IMX_ESDMISC); writel(esdcfg, MX27_ESDCTL_BASE_ADDR + IMX_ESDCFG0); /* precharge CSD0 all banks */ writel(esdctl | ESDCTL0_SMODE_PRECHARGE, MX27_ESDCTL_BASE_ADDR + IMX_ESDCTL0); writel(0x00000000, 0xa0000f00); /* CSD0 precharge address (A10 = 1) */ writel(esdctl | ESDCTL0_SMODE_AUTO_REFRESH, MX27_ESDCTL_BASE_ADDR + IMX_ESDCTL0); for (i = 0; i < 8; i++) writel(0, 0xa0000f00); writel(esdctl | ESDCTL0_SMODE_LOAD_MODE, MX27_ESDCTL_BASE_ADDR + IMX_ESDCTL0); writeb(0xda, 0xa0000033); writeb(0xff, 0xa1000000); writel(esdctl | ESDCTL0_DSIZ_31_0 | ESDCTL0_REF4 | ESDCTL0_BL | ESDCTL0_SMODE_NORMAL, MX27_ESDCTL_BASE_ADDR + IMX_ESDCTL0); } extern char __dtb_imx27_phytec_phycard_s_rdk_bb_start[]; static void __noreturn phytec_phycard_imx27_start(void) { void *fdt; fdt = __dtb_imx27_phytec_phycard_s_rdk_bb_start + get_runtime_offset(); imx27_barebox_entry(fdt); } static void __noreturn phytec_phycard_imx27_load_nand(void) { imx27_nand_load_image(); phytec_phycard_imx27_start(); } static noinline void __bare_init phytec_phycard_imx27_common_init(int sdram) { unsigned long r; arm_cpu_lowlevel_init(); /* ahb lite ip interface */ writel(0x20040304, MX27_AIPI_BASE_ADDR + MX27_AIPI1_PSR0); writel(0xdffbfcfb, MX27_AIPI_BASE_ADDR + MX27_AIPI1_PSR1); writel(0x00000000, MX27_AIPI_BASE_ADDR + MX27_AIPI2_PSR0); writel(0xffffffff, MX27_AIPI_BASE_ADDR + MX27_AIPI2_PSR1); /* Skip SDRAM initialization if we run from RAM */ r = get_pc(); if (r > 0xa0000000 && r < 0xc0000000) phytec_phycard_imx27_start(); /* 399 MHz */ writel(IMX_PLL_PD(0) | IMX_PLL_MFD(51) | IMX_PLL_MFI(7) | IMX_PLL_MFN(35), MX27_CCM_BASE_ADDR + MX27_MPCTL0); /* SPLL = 2 * 26 * 4.61538 MHz = 240 MHz */ writel(IMX_PLL_PD(1) | IMX_PLL_MFD(12) | IMX_PLL_MFI(9) | IMX_PLL_MFN(3), MX27_CCM_BASE_ADDR + MX27_SPCTL0); writel(MX27_CSCR_MPLL_RESTART | MX27_CSCR_SPLL_RESTART | MX27_CSCR_ARM_SRC_MPLL | MX27_CSCR_MCU_SEL | MX27_CSCR_SP_SEL | MX27_CSCR_FPM_EN | MX27_CSCR_MPEN | MX27_CSCR_SPEN | MX27_CSCR_ARM_DIV(0) | MX27_CSCR_AHB_DIV(1) | MX27_CSCR_USB_DIV(3) | MX27_CSCR_SD_CNT(3) | MX27_CSCR_SSI2_SEL | MX27_CSCR_SSI1_SEL | MX27_CSCR_H264_SEL | MX27_CSCR_MSHC_SEL, MX27_CCM_BASE_ADDR + MX27_CSCR); sdram_init(sdram); imx27_nand_relocate_to_sdram(phytec_phycard_imx27_load_nand); phytec_phycard_imx27_start(); } ENTRY_FUNCTION(start_phytec_phycard_imx27_64mb, r0, r1, r2) { arm_setup_stack(MX27_IRAM_BASE_ADDR + MX27_IRAM_SIZE); phytec_phycard_imx27_common_init(PHYCARD_MICRON_64MB); } ENTRY_FUNCTION(start_phytec_phycard_imx27_128mb, r0, r1, r2) { arm_setup_stack(MX27_IRAM_BASE_ADDR + MX27_IRAM_SIZE); phytec_phycard_imx27_common_init(PHYCARD_MICRON_128MB); }