1/*
 2 *  This program is free software; you can redistribute it and/or modify it
 3 *  under the terms of the GNU General Public License version 2 as published
 4 *  by the Free Software Foundation.
 5 *
 6 * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
 7 */
 8
 9#include <linux/module.h>
10#include <linux/clk.h>
 
 
 
11#include <asm/bootinfo.h>
12#include <asm/time.h>
 
13
14#include <lantiq.h>
15
16#include "prom.h"
17#include "clk.h"
18
19static struct ltq_soc_info soc_info;
 
 
20
21unsigned int ltq_get_cpu_ver(void)
22{
23	return soc_info.rev;
24}
25EXPORT_SYMBOL(ltq_get_cpu_ver);
26
27unsigned int ltq_get_soc_type(void)
28{
29	return soc_info.type;
30}
31EXPORT_SYMBOL(ltq_get_soc_type);
 
 
32
33const char *get_system_type(void)
34{
35	return soc_info.sys_type;
36}
37
38void prom_free_prom_memory(void)
39{
 
40}
41
42static void __init prom_init_cmdline(void)
43{
44	int argc = fw_arg0;
45	char **argv = (char **) KSEG1ADDR(fw_arg1);
46	int i;
47
 
 
48	for (i = 0; i < argc; i++) {
49		char *p = (char *)  KSEG1ADDR(argv[i]);
50
51		if (p && *p) {
52			strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
53			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
54		}
55	}
56}
57
58void __init prom_init(void)
59{
60	struct clk *clk;
61
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
62	ltq_soc_detect(&soc_info);
63	clk_init();
64	clk = clk_get(0, "cpu");
65	snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev1.%d",
66		soc_info.name, soc_info.rev);
67	clk_put(clk);
68	soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
69	pr_info("SoC: %s\n", soc_info.sys_type);
70	prom_init_cmdline();
 
 
 
 
 
 
 
71}

  1// SPDX-License-Identifier: GPL-2.0-only
  2/*
 
 
 
  3 *
  4 * Copyright (C) 2010 John Crispin <john@phrozen.org>
  5 */
  6
  7#include <linux/export.h>
  8#include <linux/clk.h>
  9#include <linux/memblock.h>
 10#include <linux/of_fdt.h>
 11
 12#include <asm/bootinfo.h>
 13#include <asm/time.h>
 14#include <asm/prom.h>
 15
 16#include <lantiq.h>
 17
 18#include "prom.h"
 19#include "clk.h"
 20
 21/* access to the ebu needs to be locked between different drivers */
 22DEFINE_SPINLOCK(ebu_lock);
 23EXPORT_SYMBOL_GPL(ebu_lock);
 24
 25/*
 26 * this struct is filled by the soc specific detection code and holds
 27 * information about the specific soc type, revision and name
 28 */
 29static struct ltq_soc_info soc_info;
 30
 31/*
 32 * These structs are used to override vsmp_init_secondary()
 33 */
 34#if defined(CONFIG_MIPS_MT_SMP)
 35extern const struct plat_smp_ops vsmp_smp_ops;
 36static struct plat_smp_ops lantiq_smp_ops;
 37#endif
 38
 39const char *get_system_type(void)
 40{
 41	return soc_info.sys_type;
 42}
 43
 44int ltq_soc_type(void)
 45{
 46	return soc_info.type;
 47}
 48
 49static void __init prom_init_cmdline(void)
 50{
 51	int argc = fw_arg0;
 52	char **argv = (char **) KSEG1ADDR(fw_arg1);
 53	int i;
 54
 55	arcs_cmdline[0] = '\0';
 56
 57	for (i = 0; i < argc; i++) {
 58		char *p = (char *) KSEG1ADDR(argv[i]);
 59
 60		if (CPHYSADDR(p) && *p) {
 61			strlcat(arcs_cmdline, p, sizeof(arcs_cmdline));
 62			strlcat(arcs_cmdline, " ", sizeof(arcs_cmdline));
 63		}
 64	}
 65}
 66
 67void __init plat_mem_setup(void)
 68{
 69	void *dtb;
 70
 71	ioport_resource.start = IOPORT_RESOURCE_START;
 72	ioport_resource.end = IOPORT_RESOURCE_END;
 73	iomem_resource.start = IOMEM_RESOURCE_START;
 74	iomem_resource.end = IOMEM_RESOURCE_END;
 75
 76	set_io_port_base((unsigned long) KSEG1);
 77
 78	dtb = get_fdt();
 79	if (dtb == NULL)
 80		panic("no dtb found");
 81
 82	/*
 83	 * Load the devicetree. This causes the chosen node to be
 84	 * parsed resulting in our memory appearing
 85	 */
 86	__dt_setup_arch(dtb);
 87}
 88
 89#if defined(CONFIG_MIPS_MT_SMP)
 90static void lantiq_init_secondary(void)
 91{
 92	/*
 93	 * MIPS CPU startup function vsmp_init_secondary() will only
 94	 * enable some of the interrupts for the second CPU/VPE.
 95	 */
 96	set_c0_status(ST0_IM);
 97}
 98#endif
 99
100void __init prom_init(void)
101{
102	/* call the soc specific detetcion code and get it to fill soc_info */
103	ltq_soc_detect(&soc_info);
104	snprintf(soc_info.sys_type, LTQ_SYS_TYPE_LEN - 1, "%s rev %s",
105		soc_info.name, soc_info.rev_type);
 
 
 
106	soc_info.sys_type[LTQ_SYS_TYPE_LEN - 1] = '\0';
107	pr_info("SoC: %s\n", soc_info.sys_type);
108	prom_init_cmdline();
109
110#if defined(CONFIG_MIPS_MT_SMP)
111	lantiq_smp_ops = vsmp_smp_ops;
112	if (cpu_has_mipsmt)
113		lantiq_smp_ops.init_secondary = lantiq_init_secondary;
114	register_smp_ops(&lantiq_smp_ops);
115#endif
116}