arch: arm: Add Analog Devices SC5xx machine type

Add support for the SC5xx machine type from Analog Devices. This
includes support for the SC57x, SC58x, SC59x, and SC59x-64 SoCs, which
have many common features such as common ADI IP blocks, and SHARC DSP
cores. This commit introduces core functionality required for all boards
using an SC5xx SoC, such as:

- SPL configuration
- Required CPU hooks such as reset
- Boot ROM interaction to load the stage 2 bootloader in the reference
  configuration. Other options are possible but not officially supported
  at this time
- SoC-common configuration expected to be reused by all boards
- Early initialization for system clocks and DDR controller

Co-developed-by: Greg Malysa <greg.malysa@timesys.com>
Signed-off-by: Greg Malysa <greg.malysa@timesys.com>
Co-developed-by: Ian Roberts <ian.roberts@timesys.com>
Signed-off-by: Ian Roberts <ian.roberts@timesys.com>
Signed-off-by: Vasileios Bimpikas <vasileios.bimpikas@analog.com>
Signed-off-by: Utsav Agarwal <utsav.agarwal@analog.com>
Signed-off-by: Arturs Artamonovs <arturs.artamonovs@analog.com>
Signed-off-by: Nathan Barrett-Morrison <nathan.morrison@timesys.com>

include/env/adi/adi_boot.env

@@ -0,0 +1,122 @@
+/*
+ * A target board needs to set these variables for the commands below to work:
+ *
+ * - adi_stage2_offset, the location of stage2-boot.ldr on the SPI flash
+ * - adi_image_offset, location of the fitImage on the SPI flash
+ * - adi_rfs_offset, location of the RFS on the SPI flash
+ * - loadaddr, where you want to load things
+ * - jffs2file, name of the jffs2 file for update, ex adsp-sc5xx-tiny-adsp-sc573.jffs2
+ */
+
+#ifdef CONFIG_SC59X_64
+#define EARLY_PRINTK earlycon=adi_uart,0x31003000
+#else
+#define EARLY_PRINTK earlyprintk=serial,uart0,CONFIG_BAUDRATE
+#endif
+
+/* Config options */
+imagefile=fitImage
+ethaddr=02:80:ad:20:31:e8
+eth1addr=02:80:ad:20:31:e9
+uart_console=CONFIG_UART_CONSOLE
+#ifdef CONFIG_SC59X_64
+fdt_high=0xffffffffffffffff
+initrd_high=0xffffffffffffffff
+#else
+fdt_high=0xffffffff
+initrd_high=0xffffffff
+#endif
+
+/* Helper routines */
+init_ethernet=mii info;
+	dhcp;
+	setenv serverip ${tftpserverip}
+
+/* Args for each boot mode */
+adi_bootargs=EARLY_PRINTK console=ttySC0,CONFIG_BAUDRATE vmalloc=512M
+ramargs=setenv bootargs ${adi_bootargs}
+
+addip=setenv bootargs ${bootargs} ip=${ipaddr}:${serverip}:${gatewayip}:${netmask}:${hostname}:eth0:off
+
+/* Boot modes are selectable and should be defined in the board env before including */
+#if defined(USE_NFS)
+// rootpath is set by CONFIG_ROOTPATH
+nfsargs=setenv bootargs root=/dev/nfs rw nfsroot=${serverip}${rootpath},tcp,nfsvers=3 ${adi_bootargs}
+nfsboot=run init_ethernet;
+	tftp ${loadaddr} ${tftp_dir_prefix}${imagefile};
+	run nfsargs;
+	run addip;
+	bootm ${loadaddr}
+#endif
+
+#if defined(USE_MMC)
+mmcargs=setenv bootargs root=/dev/mmcblk0p1 rw rootfstype=ext4 rootwait ${adi_bootargs}
+mmcboot=mmc rescan;
+	ext4load mmc 0:1 ${loadaddr} /boot/${imagefile};
+	run mmcargs;
+	bootm ${loadaddr}
+#endif
+
+#if defined(USE_SPI) || defined(USE_OSPI)
+spiargs=setenv bootargs root=/dev/mtdblock4 rw rootfstype=jffs2 ${adi_bootargs}
+spiboot=run spiargs;
+	sf probe ${sfdev};
+	sf read ${loadaddr} ${adi_image_offset} ${imagesize};
+	bootm ${loadaddr}
+#endif
+
+#if defined(USE_OSPI)
+ospiboot=run spiboot
+#endif
+
+#if defined(USE_RAM)
+ramboot=run init_ethernet;
+	tftp ${loadaddr} ${tfpt_dir_prefix}${imagefile};
+	run ramargs;
+	bootm ${loadaddr}
+#endif
+
+/* Update commands */
+stage1file=stage1-boot.ldr
+stage2file=stage2-boot.ldr
+
+#if defined(USE_SPI) || defined(USE_OSPI)
+update_spi_uboot_stage1=tftp ${loadaddr} ${tftp_dir_prefix}${stage1file};
+	sf probe ${sfdev};
+	sf update ${loadaddr} 0x0 ${filesize}
+update_spi_uboot_stage2=tftp ${loadaddr} ${tftp_dir_prefix}${stage2file};
+	sf probe ${sfdev};
+	sf update ${loadaddr} ${adi_stage2_offset} ${filesize}
+update_spi_uboot=run update_spi_uboot_stage1;
+	run update_spi_uboot_stage2;
+update_spi_fit=tftp ${loadaddr} ${tftp_dir_prefix}${imagefile};
+	sf probe ${sfdev};
+	sf update ${loadaddr} ${adi_image_offset} ${filesize};
+	setenv imagesize ${filesize}
+update_spi_rfs=tftp ${loadaddr} ${tftp_dir_prefix}${jffs2file};
+	sf probe ${sfdev};
+	sf update ${loadaddr} ${adi_rfs_offset} ${filesize}
+
+start_update_spi=run init_ethernet;
+	run update_spi_uboot;
+	run update_spi_fit;
+	run update_spi_rfs;
+start_update_spi_uboot_only=run init_ethernet;
+	run update_spi_uboot;
+#endif
+
+#if defined(USE_SPI)
+update_spi=setenv sfdev CONFIG_SC_BOOT_SPI_BUS:CONFIG_SC_BOOT_SPI_SSEL;
+	setenv bootcmd run spiboot;
+	setenv argscmd spiargs;
+	run start_update_spi;
+	saveenv
+#endif
+
+#if defined(USE_OSPI)
+update_ospi=setenv sfdev CONFIG_SC_BOOT_OSPI_BUS:CONFIG_SC_BOOT_OSPI_SSEL;
+	setenv bootcmd run ospiboot;
+	setenv argscmd spiargs;
+	run start_update_spi;
+	saveenv
+#endif