[MIPS] Routerboard 532: Support for base system
Signed-off-by: Phil Sutter <n0-1@freewrt.org>
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/rb532/prom.c b/arch/mips/rb532/prom.c
new file mode 100644
index 0000000..1bc0af8
--- /dev/null
+++ b/arch/mips/rb532/prom.c
@@ -0,0 +1,158 @@
+/*
+ * RouterBoard 500 specific prom routines
+ *
+ * Copyright (C) 2003, Peter Sadik <peter.sadik@idt.com>
+ * Copyright (C) 2005-2006, P.Christeas <p_christ@hol.gr>
+ * Copyright (C) 2007, Gabor Juhos <juhosg@openwrt.org>
+ * Felix Fietkau <nbd@openwrt.org>
+ * Florian Fainelli <florian@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/string.h>
+#include <linux/console.h>
+#include <linux/bootmem.h>
+#include <linux/ioport.h>
+#include <linux/blkdev.h>
+
+#include <asm/bootinfo.h>
+#include <asm/mach-rc32434/ddr.h>
+#include <asm/mach-rc32434/prom.h>
+
+extern void __init setup_serial_port(void);
+
+unsigned int idt_cpu_freq = 132000000;
+EXPORT_SYMBOL(idt_cpu_freq);
+unsigned int gpio_bootup_state;
+EXPORT_SYMBOL(gpio_bootup_state);
+
+static struct resource ddr_reg[] = {
+ {
+ .name = "ddr-reg",
+ .start = DDR0_PHYS_ADDR,
+ .end = DDR0_PHYS_ADDR + sizeof(struct ddr_ram),
+ .flags = IORESOURCE_MEM,
+ }
+};
+
+void __init prom_free_prom_memory(void)
+{
+ /* No prom memory to free */
+}
+
+static inline int match_tag(char *arg, const char *tag)
+{
+ return strncmp(arg, tag, strlen(tag)) == 0;
+}
+
+static inline unsigned long tag2ul(char *arg, const char *tag)
+{
+ char *num;
+
+ num = arg + strlen(tag);
+ return simple_strtoul(num, 0, 10);
+}
+
+void __init prom_setup_cmdline(void)
+{
+ char cmd_line[CL_SIZE];
+ char *cp, *board;
+ int prom_argc;
+ char **prom_argv, **prom_envp;
+ int i;
+
+ prom_argc = fw_arg0;
+ prom_argv = (char **) fw_arg1;
+ prom_envp = (char **) fw_arg2;
+
+ cp = cmd_line;
+ /* Note: it is common that parameters start
+ * at argv[1] and not argv[0],
+ * however, our elf loader starts at [0] */
+ for (i = 0; i < prom_argc; i++) {
+ if (match_tag(prom_argv[i], FREQ_TAG)) {
+ idt_cpu_freq = tag2ul(prom_argv[i], FREQ_TAG);
+ continue;
+ }
+#ifdef IGNORE_CMDLINE_MEM
+ /* parses out the "mem=xx" arg */
+ if (match_tag(prom_argv[i], MEM_TAG))
+ continue;
+#endif
+ if (i > 0)
+ *(cp++) = ' ';
+ if (match_tag(prom_argv[i], BOARD_TAG)) {
+ board = prom_argv[i] + strlen(BOARD_TAG);
+
+ if (match_tag(board, BOARD_RB532A))
+ mips_machtype = MACH_MIKROTIK_RB532A;
+ else
+ mips_machtype = MACH_MIKROTIK_RB532;
+ }
+
+ if (match_tag(prom_argv[i], GPIO_TAG))
+ gpio_bootup_state = tag2ul(prom_argv[i], GPIO_TAG);
+
+ strcpy(cp, prom_argv[i]);
+ cp += strlen(prom_argv[i]);
+ }
+ *(cp++) = ' ';
+
+ i = strlen(arcs_cmdline);
+ if (i > 0) {
+ *(cp++) = ' ';
+ strcpy(cp, arcs_cmdline);
+ cp += strlen(arcs_cmdline);
+ }
+ if (gpio_bootup_state & 0x02)
+ strcpy(cp, GPIO_INIT_NOBUTTON);
+ else
+ strcpy(cp, GPIO_INIT_BUTTON);
+
+ cmd_line[CL_SIZE-1] = '\0';
+
+ strcpy(arcs_cmdline, cmd_line);
+}
+
+void __init prom_init(void)
+{
+ struct ddr_ram __iomem *ddr;
+ phys_t memsize;
+ phys_t ddrbase;
+
+ ddr = ioremap_nocache(ddr_reg[0].start,
+ ddr_reg[0].end - ddr_reg[0].start);
+
+ if (!ddr) {
+ printk(KERN_ERR "Unable to remap DDR register\n");
+ return;
+ }
+
+ ddrbase = (phys_t)&ddr->ddrbase;
+ memsize = (phys_t)&ddr->ddrmask;
+ memsize = 0 - memsize;
+
+ prom_setup_cmdline();
+
+ /* give all RAM to boot allocator,
+ * except for the first 0x400 and the last 0x200 bytes */
+ add_memory_region(ddrbase + 0x400, memsize - 0x600, BOOT_MEM_RAM);
+}