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
23#include "clock.h"
24
25struct davinci_soc_info davinci_soc_info;
26EXPORT_SYMBOL(davinci_soc_info);
27
28void __iomem *davinci_intc_base;
29int davinci_intc_type;
30
31void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context)
32{
33	char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
34	off_t offset = (off_t)context;
35
36	/* Read MAC addr from EEPROM */
37	if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
38		pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
39}
40
41static int __init davinci_init_id(struct davinci_soc_info *soc_info)
42{
43	int			i;
44	struct davinci_id	*dip;
45	u8			variant;
46	u16			part_no;
47	void __iomem		*base;
48
49	base = ioremap(soc_info->jtag_id_reg, SZ_4K);
50	if (!base) {
51		pr_err("Unable to map JTAG ID register\n");
52		return -ENOMEM;
53	}
54
55	soc_info->jtag_id = __raw_readl(base);
56	iounmap(base);
57
58	variant = (soc_info->jtag_id & 0xf0000000) >> 28;
59	part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
60
61	for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
62			i++, dip++)
63		/* Don't care about the manufacturer right now */
64		if ((dip->part_no == part_no) && (dip->variant == variant)) {
65			soc_info->cpu_id = dip->cpu_id;
66			pr_info("DaVinci %s variant 0x%x\n", dip->name,
67					dip->variant);
68			return 0;
69		}
70
71	pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
72	return -EINVAL;
73}
74
75void __init davinci_common_init(struct davinci_soc_info *soc_info)
76{
77	int ret;
78
79	if (!soc_info) {
80		ret = -EINVAL;
81		goto err;
82	}
83
84	memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
85
86	if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
87		iotable_init(davinci_soc_info.io_desc,
88				davinci_soc_info.io_desc_num);
89
90	/*
91	 * Normally devicemaps_init() would flush caches and tlb after
92	 * mdesc->map_io(), but we must also do it here because of the CPU
93	 * revision check below.
94	 */
95	local_flush_tlb_all();
96	flush_cache_all();
97
98	/*
99	 * We want to check CPU revision early for cpu_is_xxxx() macros.
100	 * IO space mapping must be initialized before we can do that.
101	 */
102	ret = davinci_init_id(&davinci_soc_info);
103	if (ret < 0)
104		goto err;
105
106	if (davinci_soc_info.cpu_clks) {
107		ret = davinci_clk_init(davinci_soc_info.cpu_clks);
108
109		if (ret != 0)
110			goto err;
111	}
112
113	return;
114
115err:
116	panic("davinci_common_init: SoC Initialization failed\n");
117}
118
119void __init davinci_init_late(void)
120{
121	davinci_cpufreq_init();
122	davinci_pm_init();
123	davinci_clk_disable_unused();
124}
125