1/*
2 * Code commons to all DaVinci SoCs.
3 *
4 * Author: Mark A. Greer <mgreer@mvista.com>
5 *
6 * 2009 (c) MontaVista Software, Inc. This file is licensed under
7 * the terms of the GNU General Public License version 2. This program
8 * is licensed "as is" without any warranty of any kind, whether express
9 * or implied.
10 */
11#include <linux/module.h>
12#include <linux/io.h>
13#include <linux/etherdevice.h>
14#include <linux/davinci_emac.h>
15#include <linux/dma-mapping.h>
16
17#include <asm/tlb.h>
18#include <asm/mach/map.h>
19
20#include <mach/common.h>
21#include <mach/cputype.h>
22
23struct davinci_soc_info davinci_soc_info;
24EXPORT_SYMBOL(davinci_soc_info);
25
26static int __init davinci_init_id(struct davinci_soc_info *soc_info)
27{
28	int			i;
29	struct davinci_id	*dip;
30	u8			variant;
31	u16			part_no;
32	void __iomem		*base;
33
34	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
35	if (!base) {
36		pr_err("Unable to map JTAG ID register\n");
37		return -ENOMEM;
38	}
39
40	soc_info->jtag_id = __raw_readl(base);
41	iounmap(base);
42
43	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
44	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
45
46	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
47			i++, dip++)
48		/* Don't care about the manufacturer right now */
49		if ((dip->part_no == part_no) && (dip->variant == variant)) {
50			soc_info->cpu_id = dip->cpu_id;
51			pr_info("DaVinci %s variant 0x%x\n", dip->name,
52					dip->variant);
53			return 0;
54		}
55
56	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
57	return -EINVAL;
58}
59
60void __init davinci_common_init(const struct davinci_soc_info *soc_info)
61{
62	int ret;
63
64	if (!soc_info) {
65		ret = -EINVAL;
66		goto err;
67	}
68
69	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
70
71	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
72		iotable_init(davinci_soc_info.io_desc,
73				davinci_soc_info.io_desc_num);
74
75	/*
76	 * Normally devicemaps_init() would flush caches and tlb after
77	 * mdesc->map_io(), but we must also do it here because of the CPU
78	 * revision check below.
79	 */
80	local_flush_tlb_all();
81	flush_cache_all();
82
83	/*
84	 * We want to check CPU revision early for cpu_is_xxxx() macros.
85	 * IO space mapping must be initialized before we can do that.
86	 */
87	ret = davinci_init_id(&davinci_soc_info);
88	if (ret < 0)
89		goto err;
90
91
92	return;
93
94err:
95	panic("davinci_common_init: SoC Initialization failed\n");
96}
97
98void __init davinci_init_late(void)
99{
100	davinci_cpufreq_init();
101}
102