[MIPS] Add back support for LASAT platforms
Signed-off-by: Brian Murphy <brian@murphy.dk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/lasat/prom.c b/arch/mips/lasat/prom.c
new file mode 100644
index 0000000..4b80fff
--- /dev/null
+++ b/arch/mips/lasat/prom.c
@@ -0,0 +1,128 @@
+/*
+ * PROM interface routines.
+ */
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/bootmem.h>
+#include <linux/ioport.h>
+#include <asm/bootinfo.h>
+#include <asm/lasat/lasat.h>
+#include <asm/cpu.h>
+
+#include "at93c.h"
+#include <asm/lasat/eeprom.h>
+#include "prom.h"
+
+#define RESET_VECTOR 0xbfc00000
+#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
+#define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0)
+#define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1)
+#define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2)
+
+static void null_prom_display(const char *string, int pos, int clear)
+{
+}
+
+static void null_prom_monitor(void)
+{
+}
+
+static void null_prom_putc(char c)
+{
+}
+
+/* these are functions provided by the bootloader */
+static void (*__prom_putc)(char c) = null_prom_putc;
+
+void prom_putchar(char c)
+{
+ __prom_putc(c);
+}
+
+void (*prom_display)(const char *string, int pos, int clear) =
+ null_prom_display;
+void (*prom_monitor)(void) = null_prom_monitor;
+
+unsigned int lasat_ndelay_divider;
+
+static void setup_prom_vectors(void)
+{
+ u32 version = *(u32 *)(RESET_VECTOR + 0x90);
+
+ if (version >= 307) {
+ prom_display = (void *)PROM_DISPLAY_ADDR;
+ __prom_putc = (void *)PROM_PUTC_ADDR;
+ prom_monitor = (void *)PROM_MONITOR_ADDR;
+ }
+ printk(KERN_DEBUG "prom vectors set up\n");
+}
+
+static struct at93c_defs at93c_defs[N_MACHTYPES] = {
+ {
+ .reg = (void *)AT93C_REG_100,
+ .rdata_reg = (void *)AT93C_RDATA_REG_100,
+ .rdata_shift = AT93C_RDATA_SHIFT_100,
+ .wdata_shift = AT93C_WDATA_SHIFT_100,
+ .cs = AT93C_CS_M_100,
+ .clk = AT93C_CLK_M_100
+ }, {
+ .reg = (void *)AT93C_REG_200,
+ .rdata_reg = (void *)AT93C_RDATA_REG_200,
+ .rdata_shift = AT93C_RDATA_SHIFT_200,
+ .wdata_shift = AT93C_WDATA_SHIFT_200,
+ .cs = AT93C_CS_M_200,
+ .clk = AT93C_CLK_M_200
+ },
+};
+
+void __init prom_init(void)
+{
+ int argc = fw_arg0;
+ char **argv = (char **) fw_arg1;
+
+ setup_prom_vectors();
+
+ if (current_cpu_data.cputype == CPU_R5000) {
+ printk(KERN_INFO "LASAT 200 board\n");
+ mips_machtype = MACH_LASAT_200;
+ lasat_ndelay_divider = LASAT_200_DIVIDER;
+ } else {
+ printk(KERN_INFO "LASAT 100 board\n");
+ mips_machtype = MACH_LASAT_100;
+ lasat_ndelay_divider = LASAT_100_DIVIDER;
+ }
+
+ at93c = &at93c_defs[mips_machtype];
+
+ lasat_init_board_info(); /* Read info from EEPROM */
+
+ mips_machgroup = MACH_GROUP_LASAT;
+
+ /* Get the command line */
+ if (argc > 0) {
+ strncpy(arcs_cmdline, argv[0], CL_SIZE-1);
+ arcs_cmdline[CL_SIZE-1] = '\0';
+ }
+
+ /* Set the I/O base address */
+ set_io_port_base(KSEG1);
+
+ /* Set memory regions */
+ ioport_resource.start = 0;
+ ioport_resource.end = 0xffffffff; /* Wrong, fixme. */
+
+ add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
+}
+
+void __init prom_free_prom_memory(void)
+{
+}
+
+const char *get_system_type(void)
+{
+ return lasat_board_info.li_bmstr;
+}