--- /dev/null
+/*
+ * Board-specific early ddr/sdram init.
+ *
+ * (C) Copyright 2017 Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+.equ PPMCR0, 0xfc04002d
+.equ MSCR_SDRAMC, 0xec094060
+.equ MISCCR2, 0xec09001a
+.equ DDR_RCR, 0xfc0b8180
+.equ DDR_PADCR, 0xfc0b81ac
+.equ DDR_CR00, 0xfc0b8000
+.equ DDR_CR06, 0xfc0b8018
+.equ DDR_CR09, 0xfc0b8024
+.equ DDR_CR40, 0xfc0b80a0
+.equ DDR_CR45, 0xfc0b80b4
+.equ DDR_CR56, 0xfc0b80e0
+
+.global sbf_dram_init
+.text
+
+sbf_dram_init:
+ /* CD46 = DDR on */
+ move.l #PPMCR0, %a1
+ move.b #46, (%a1)
+
+ /* stmark 2, max drive strength */
+ move.l #MSCR_SDRAMC, %a1
+ move.b #1, (%a1)
+
+ /*
+ * use cpu clock, seems more realiable
+ *
+ * DDR2 clock is serviced from DDR controller as input clock / 2
+ * so, if clock comes from
+ * vco, i.e. 480(vco) / 2, so ddr clock is 240 Mhz (measured)
+ * cpu, i.e. 250(cpu) / 2, so ddr clock is 125 Mhz (measured)
+ *
+ * .
+ * / \ DDR2 can't be clocked lower than 125Mhz
+ * / ! \ DDR2 init must pass further i/dcache enable test
+ * /_____\
+ * WARNING
+ */
+
+ /* cpu / 2 = 125 Mhz for 480 Mhz pll */
+ move.l #MISCCR2, %a1
+ move.w #0xa01d, (%a1)
+
+ /* DDR force sw reset settings */
+ move.l #DDR_RCR, %a1
+ move.l #0x00000000, (%a1)
+ move.l #0x40000000, (%a1)
+
+ /*
+ * PAD_ODT_CS: for us seems both 1(75 ohm) and 2(150ohm) are good,
+ * 500/700 mV are ok
+ */
+ move.l #DDR_PADCR, %a1
+ move.l #0x01030203, (%a1) /* as freescale tower */
+
+ move.l #DDR_CR00, %a1
+ move.l #0x01010101, (%a1)+ /* 0x00 */
+ move.l #0x00000101, (%a1)+ /* 0x04 */
+ move.l #0x01010100, (%a1)+ /* 0x08 */
+ move.l #0x01010000, (%a1)+ /* 0x0C */
+ move.l #0x00010101, (%a1)+ /* 0x10 */
+ move.l #DDR_CR06, %a1
+ move.l #0x00010100, (%a1)+ /* 0x18 */
+ move.l #0x00000001, (%a1)+ /* 0x1C */
+ move.l #0x01000001, (%a1)+ /* 0x20 */
+ move.l #0x00000100, (%a1)+ /* 0x24 */
+ move.l #0x00010001, (%a1)+ /* 0x28 */
+ move.l #0x00000200, (%a1)+ /* 0x2C */
+ move.l #0x01000002, (%a1)+ /* 0x30 */
+ move.l #0x00000000, (%a1)+ /* 0x34 */
+ move.l #0x00000100, (%a1)+ /* 0x38 */
+ move.l #0x02000100, (%a1)+ /* 0x3C */
+ move.l #0x02000407, (%a1)+ /* 0x40 */
+ move.l #0x02030007, (%a1)+ /* 0x44 */
+ move.l #0x02000100, (%a1)+ /* 0x48 */
+ move.l #0x0A030203, (%a1)+ /* 0x4C */
+ move.l #0x00020708, (%a1)+ /* 0x50 */
+ move.l #0x00050008, (%a1)+ /* 0x54 */
+ move.l #0x04030002, (%a1)+ /* 0x58 */
+ move.l #0x00000004, (%a1)+ /* 0x5C */
+ move.l #0x020A0000, (%a1)+ /* 0x60 */
+ move.l #0x0C00000E, (%a1)+ /* 0x64 */
+ move.l #0x00002004, (%a1)+ /* 0x68 */
+ move.l #0x00000000, (%a1)+ /* 0x6C */
+ move.l #0x00100010, (%a1)+ /* 0x70 */
+ move.l #0x00100010, (%a1)+ /* 0x74 */
+ move.l #0x00000000, (%a1)+ /* 0x78 */
+ move.l #0x07990000, (%a1)+ /* 0x7C */
+ move.l #DDR_CR40, %a1
+ move.l #0x00000000, (%a1)+ /* 0xA0 */
+ move.l #0x00C80064, (%a1)+ /* 0xA4 */
+ move.l #0x44520002, (%a1)+ /* 0xA8 */
+ move.l #0x00C80023, (%a1)+ /* 0xAC */
+ move.l #DDR_CR45, %a1
+ move.l #0x0000C350, (%a1) /* 0xB4 */
+ move.l #DDR_CR56, %a1
+ move.l #0x04000000, (%a1)+ /* 0xE0 */
+ move.l #0x03000304, (%a1)+ /* 0xE4 */
+ move.l #0x40040000, (%a1)+ /* 0xE8 */
+ move.l #0xC0004004, (%a1)+ /* 0xEC */
+ move.l #0x0642C000, (%a1)+ /* 0xF0 */
+ move.l #0x00000642, (%a1)+ /* 0xF4 */
+ move.l #DDR_CR09, %a1
+ tpf
+ move.l #0x01000100, (%a1) /* 0x24 */
+
+ move.l #0x2000, %d1
+ bsr asm_delay
+
+
+ rts
--- /dev/null
+/*
+ * Sysam stmark2 board configuration
+ *
+ * (C) Copyright 2017 Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __STMARK2_CONFIG_H
+#define __STMARK2_CONFIG_H
+
+#define CONFIG_STMARK2
+#define CONFIG_HOSTNAME stmark2
+
+#define CONFIG_MCFUART
+#define CONFIG_SYS_UART_PORT 0
+#define CONFIG_SYS_BAUDRATE_TABLE { 9600 , 19200 , 38400 , 57600, 115200 }
+
+#define LDS_BOARD_TEXT \
+ board/sysam/stmark2/sbf_dram_init.o (.text*)
+
+#define CONFIG_TIMESTAMP
+
+#define CONFIG_BOOTARGS \
+ "console=ttyS0,115200 root=/dev/ram0 rw " \
+ "rootfstype=ramfs " \
+ "rdinit=/bin/init " \
+ "devtmpfs.mount=1"
+
+#define CONFIG_BOOTCOMMAND \
+ "sf probe 0:1 50000000; " \
+ "sf read ${loadaddr} 0x100000 ${kern_size}; " \
+ "bootm ${loadaddr}"
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+ "kern_size=0x700000\0" \
+ "loadaddr=0x40001000\0" \
+ "-(rootfs)\0" \
+ "update_uboot=loady ${loadaddr}; " \
+ "sf probe 0:1 50000000; " \
+ "sf erase 0 0x80000; " \
+ "sf write ${loadaddr} 0 ${filesize}\0" \
+ "update_kernel=loady ${loadaddr}; " \
+ "setenv kern_size ${filesize}; saveenv; " \
+ "sf probe 0:1 50000000; " \
+ "sf erase 0x100000 0x700000; " \
+ "sf write ${loadaddr} 0x100000 ${filesize}\0" \
+ "update_rootfs=loady ${loadaddr}; " \
+ "sf probe 0:1 50000000; " \
+ "sf erase 0x00800000 0x100000; " \
+ "sf write ${loadaddr} 0x00800000 ${filesize}\0" \
+ ""
+
+/* Realtime clock */
+#undef CONFIG_MCFRTC
+#define CONFIG_RTC_MCFRRTC
+#define CONFIG_SYS_MCFRRTC_BASE 0xFC0A8000
+
+/* spi not partitions */
+#define CONFIG_CMD_MTDPARTS
+#define CONFIG_MTD_DEVICE
+#define CONFIG_JFFS2_CMDLINE
+#define CONFIG_JFFS2_DEV "nor0"
+#define MTDIDS_DEFAULT "nor0=spi-flash.0"
+#define MTDPARTS_DEFAULT \
+ "mtdparts=spi-flash.0:" \
+ "1m(u-boot)," \
+ "7m(kernel)," \
+ "-(rootfs)"
+
+/* Timer */
+#define CONFIG_MCFTMR
+#undef CONFIG_MCFPIT
+
+/* DSPI and Serial Flash */
+#define CONFIG_CF_SPI
+#define CONFIG_CF_DSPI
+#define CONFIG_SF_DEFAULT_SPEED 50000000
+#define CONFIG_SERIAL_FLASH
+#define CONFIG_HARD_SPI
+#define CONFIG_SPI_FLASH_ISSI
+#define CONFIG_ENV_SPI_BUS 0
+#define CONFIG_ENV_SPI_CS 1
+
+#define CONFIG_SYS_SBFHDR_SIZE 0x7
+
+#define CONFIG_SYS_DSPI_CTAR0 (DSPI_CTAR_TRSZ(7) | \
+ DSPI_CTAR_PCSSCK_1CLK | \
+ DSPI_CTAR_PASC(0) | \
+ DSPI_CTAR_PDT(0) | \
+ DSPI_CTAR_CSSCK(0) | \
+ DSPI_CTAR_ASC(0) | \
+ DSPI_CTAR_DT(1) | \
+ DSPI_CTAR_BR(6))
+#define CONFIG_SYS_DSPI_CTAR1 (CONFIG_SYS_DSPI_CTAR0)
+#define CONFIG_SYS_DSPI_CTAR2 (CONFIG_SYS_DSPI_CTAR0)
+
+/* Input, PCI, Flexbus, and VCO */
+#define CONFIG_EXTRA_CLOCK
+
+#define CONFIG_PRAM 2048 /* 2048 KB */
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_SYS_CBSIZE 256 /* Console I/O Buffer Size */
+
+/* Print Buffer Size */
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + \
+ sizeof(CONFIG_SYS_PROMPT) + 16)
+#define CONFIG_SYS_MAXARGS 16
+/* Boot Argument Buffer Size */
+#define CONFIG_SYS_BARGSIZE CONFIG_SYS_CBSIZE
+
+#define CONFIG_SYS_LOAD_ADDR (CONFIG_SYS_SDRAM_BASE + 0x10000)
+#define CONFIG_SYS_MBAR 0xFC000000
+
+/*
+ * Definitions for initial stack pointer and data area (in internal SRAM)
+ */
+#define CONFIG_SYS_INIT_RAM_ADDR 0x80000000
+/* End of used area in internal SRAM */
+#define CONFIG_SYS_INIT_RAM_SIZE 0x10000
+#define CONFIG_SYS_INIT_RAM_CTRL 0x221
+#define CONFIG_SYS_GBL_DATA_OFFSET ((CONFIG_SYS_INIT_RAM_SIZE - \
+ GENERATED_GBL_DATA_SIZE) - 32)
+#define CONFIG_SYS_INIT_SP_OFFSET CONFIG_SYS_GBL_DATA_OFFSET
+#define CONFIG_SYS_SBFHDR_DATA_OFFSET (CONFIG_SYS_INIT_RAM_SIZE - 32)
+
+/*
+ * Start addresses for the final memory configuration
+ * (Set up by the startup code)
+ * Please note that CONFIG_SYS_SDRAM_BASE _must_ start at 0
+ */
+#define CONFIG_SYS_SDRAM_BASE 0x40000000
+#define CONFIG_SYS_SDRAM_SIZE 128 /* SDRAM size in MB */
+
+#define CONFIG_SYS_MEMTEST_START (CONFIG_SYS_SDRAM_BASE + 0x400)
+#define CONFIG_SYS_MEMTEST_END ((CONFIG_SYS_SDRAM_SIZE - 3) << 20)
+#define CONFIG_SYS_DRAM_TEST
+
+#if defined(CONFIG_CF_SBF)
+#define CONFIG_SERIAL_BOOT
+#endif
+
+#if defined(CONFIG_SERIAL_BOOT)
+#define CONFIG_SYS_MONITOR_BASE (CONFIG_SYS_TEXT_BASE + 0x400)
+#else
+#define CONFIG_SYS_MONITOR_BASE (CONFIG_SYS_FLASH_BASE + 0x400)
+#endif
+
+#define CONFIG_SYS_BOOTPARAMS_LEN (64 * 1024)
+/* Reserve 256 kB for Monitor */
+#define CONFIG_SYS_MONITOR_LEN (256 << 10)
+/* Reserve 256 kB for malloc() */
+#define CONFIG_SYS_MALLOC_LEN (256 << 10)
+
+/*
+ * For booting Linux, the board info and command line data
+ * have to be in the first 8 MB of memory, since this is
+ * the maximum mapped by the Linux kernel during initialization ??
+ */
+/* Initial Memory map for Linux */
+#define CONFIG_SYS_BOOTMAPSZ (CONFIG_SYS_SDRAM_BASE + \
+ (CONFIG_SYS_SDRAM_SIZE << 20))
+
+/* Configuration for environment
+ * Environment is embedded in u-boot in the second sector of the flash
+ */
+
+#if defined(CONFIG_CF_SBF)
+#define CONFIG_ENV_IS_IN_SPI_FLASH 1
+#define CONFIG_ENV_SPI_CS 1
+#define CONFIG_ENV_OFFSET 0x40000
+#define CONFIG_ENV_SIZE 0x2000
+#define CONFIG_ENV_SECT_SIZE 0x10000
+#endif
+
+#undef CONFIG_ENV_OVERWRITE
+
+/* Cache Configuration */
+#define CONFIG_SYS_CACHELINE_SIZE 16
+#define ICACHE_STATUS (CONFIG_SYS_INIT_RAM_ADDR + \
+ CONFIG_SYS_INIT_RAM_SIZE - 8)
+#define DCACHE_STATUS (CONFIG_SYS_INIT_RAM_ADDR + \
+ CONFIG_SYS_INIT_RAM_SIZE - 4)
+#define CONFIG_SYS_ICACHE_INV (CF_CACR_BCINVA + CF_CACR_ICINVA)
+#define CONFIG_SYS_DCACHE_INV (CF_CACR_DCINVA)
+#define CONFIG_SYS_CACHE_ACR2 (CONFIG_SYS_SDRAM_BASE | \
+ CF_ADDRMASK(CONFIG_SYS_SDRAM_SIZE) | \
+ CF_ACR_EN | CF_ACR_SM_ALL)
+#define CONFIG_SYS_CACHE_ICACR (CF_CACR_BEC | CF_CACR_IEC | \
+ CF_CACR_ICINVA | CF_CACR_EUSP)
+#define CONFIG_SYS_CACHE_DCACR ((CONFIG_SYS_CACHE_ICACR | \
+ CF_CACR_DEC | CF_CACR_DDCM_P | \
+ CF_CACR_DCINVA) & ~CF_CACR_ICINVA)
+
+#define CACR_STATUS (CONFIG_SYS_INIT_RAM_ADDR + \
+ CONFIG_SYS_INIT_RAM_SIZE - 12)
+
+#endif /* __STMARK2_CONFIG_H */