1/*
2 * PROM interface routines.
3 */
4#include <linux/types.h>
5#include <linux/init.h>
6#include <linux/string.h>
7#include <linux/ctype.h>
8#include <linux/kernel.h>
9#include <linux/mm.h>
10#include <linux/bootmem.h>
11#include <linux/ioport.h>
12#include <asm/bootinfo.h>
13#include <asm/lasat/lasat.h>
14#include <asm/cpu.h>
15
16#include "at93c.h"
17#include <asm/lasat/eeprom.h>
18#include "prom.h"
19
20#define RESET_VECTOR	0xbfc00000
21#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
22#define PROM_DISPLAY_ADDR	PROM_JUMP_TABLE_ENTRY(0)
23#define PROM_PUTC_ADDR		PROM_JUMP_TABLE_ENTRY(1)
24#define PROM_MONITOR_ADDR	PROM_JUMP_TABLE_ENTRY(2)
25
26static void null_prom_display(const char *string, int pos, int clear)
27{
28}
29
30static void null_prom_monitor(void)
31{
32}
33
34static void null_prom_putc(char c)
35{
36}
37
38/* these are functions provided by the bootloader */
39static void (*__prom_putc)(char c) = null_prom_putc;
40
41void prom_putchar(char c)
42{
43	__prom_putc(c);
44}
45
46void (*prom_display)(const char *string, int pos, int clear) =
47		null_prom_display;
48void (*prom_monitor)(void) = null_prom_monitor;
49
50unsigned int lasat_ndelay_divider;
51
52static void setup_prom_vectors(void)
53{
54	u32 version = *(u32 *)(RESET_VECTOR + 0x90);
55
56	if (version >= 307) {
57		prom_display = (void *)PROM_DISPLAY_ADDR;
58		__prom_putc = (void *)PROM_PUTC_ADDR;
59		prom_monitor = (void *)PROM_MONITOR_ADDR;
60	}
61	printk(KERN_DEBUG "prom vectors set up\n");
62}
63
64static struct at93c_defs at93c_defs[N_MACHTYPES] = {
65	{
66		.reg		= (void *)AT93C_REG_100,
67		.rdata_reg	= (void *)AT93C_RDATA_REG_100,
68		.rdata_shift	= AT93C_RDATA_SHIFT_100,
69		.wdata_shift	= AT93C_WDATA_SHIFT_100,
70		.cs		= AT93C_CS_M_100,
71		.clk		= AT93C_CLK_M_100
72	}, {
73		.reg		= (void *)AT93C_REG_200,
74		.rdata_reg	= (void *)AT93C_RDATA_REG_200,
75		.rdata_shift	= AT93C_RDATA_SHIFT_200,
76		.wdata_shift	= AT93C_WDATA_SHIFT_200,
77		.cs		= AT93C_CS_M_200,
78		.clk		= AT93C_CLK_M_200
79	},
80};
81
82void __init prom_init(void)
83{
84	int argc = fw_arg0;
85	char **argv = (char **) fw_arg1;
86
87	setup_prom_vectors();
88
89	if (IS_LASAT_200()) {
90		printk(KERN_INFO "LASAT 200 board\n");
91		lasat_ndelay_divider = LASAT_200_DIVIDER;
92		at93c = &at93c_defs[1];
93	} else {
94		printk(KERN_INFO "LASAT 100 board\n");
95		lasat_ndelay_divider = LASAT_100_DIVIDER;
96		at93c = &at93c_defs[0];
97	}
98
99	lasat_init_board_info();		/* Read info from EEPROM */
100
101	/* Get the command line */
102	if (argc > 0) {
103		strncpy(arcs_cmdline, argv[0], COMMAND_LINE_SIZE-1);
104		arcs_cmdline[COMMAND_LINE_SIZE-1] = '\0';
105	}
106
107	/* Set the I/O base address */
108	set_io_port_base(KSEG1);
109
110	/* Set memory regions */
111	ioport_resource.start = 0;
112	ioport_resource.end = 0xffffffff;	/* Wrong, fixme.  */
113
114	add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
115}
116
117void __init prom_free_prom_memory(void)
118{
119}
120
121const char *get_system_type(void)
122{
123	return lasat_board_info.li_bmstr;
124}
125