Commit | Line | Data |
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79c3c0b7 MG |
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 | ||
14 | #include <asm/tlb.h> | |
15 | #include <asm/mach/map.h> | |
16 | ||
17 | #include <mach/common.h> | |
b9ab1279 | 18 | #include <mach/cputype.h> |
79c3c0b7 | 19 | |
66e0c399 MG |
20 | #include "clock.h" |
21 | ||
79c3c0b7 MG |
22 | struct davinci_soc_info davinci_soc_info; |
23 | EXPORT_SYMBOL(davinci_soc_info); | |
24 | ||
673dd36f MG |
25 | void __iomem *davinci_intc_base; |
26 | ||
b9ab1279 MG |
27 | static struct davinci_id * __init davinci_get_id(u32 jtag_id) |
28 | { | |
29 | int i; | |
30 | struct davinci_id *dip; | |
31 | u8 variant = (jtag_id & 0xf0000000) >> 28; | |
32 | u16 part_no = (jtag_id & 0x0ffff000) >> 12; | |
33 | ||
34 | for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num; | |
35 | i++, dip++) | |
36 | /* Don't care about the manufacturer right now */ | |
37 | if ((dip->part_no == part_no) && (dip->variant == variant)) | |
38 | return dip; | |
39 | ||
40 | return NULL; | |
41 | } | |
42 | ||
79c3c0b7 MG |
43 | void __init davinci_common_init(struct davinci_soc_info *soc_info) |
44 | { | |
45 | int ret; | |
b9ab1279 | 46 | struct davinci_id *dip; |
79c3c0b7 MG |
47 | |
48 | if (!soc_info) { | |
49 | ret = -EINVAL; | |
50 | goto err; | |
51 | } | |
52 | ||
53 | memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); | |
54 | ||
55 | if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) | |
56 | iotable_init(davinci_soc_info.io_desc, | |
57 | davinci_soc_info.io_desc_num); | |
58 | ||
59 | /* | |
60 | * Normally devicemaps_init() would flush caches and tlb after | |
61 | * mdesc->map_io(), but we must also do it here because of the CPU | |
62 | * revision check below. | |
63 | */ | |
64 | local_flush_tlb_all(); | |
65 | flush_cache_all(); | |
66 | ||
67 | /* | |
68 | * We want to check CPU revision early for cpu_is_xxxx() macros. | |
69 | * IO space mapping must be initialized before we can do that. | |
70 | */ | |
b9ab1279 MG |
71 | davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base); |
72 | ||
73 | dip = davinci_get_id(davinci_soc_info.jtag_id); | |
74 | if (!dip) { | |
75 | ret = -EINVAL; | |
76 | goto err; | |
77 | } | |
78 | ||
79 | davinci_soc_info.cpu_id = dip->cpu_id; | |
80 | pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant); | |
79c3c0b7 | 81 | |
66e0c399 MG |
82 | if (davinci_soc_info.cpu_clks) { |
83 | ret = davinci_clk_init(davinci_soc_info.cpu_clks); | |
84 | ||
85 | if (ret != 0) | |
86 | goto err; | |
87 | } | |
88 | ||
673dd36f | 89 | davinci_intc_base = davinci_soc_info.intc_base; |
79c3c0b7 MG |
90 | return; |
91 | ||
92 | err: | |
93 | pr_err("davinci_common_init: SoC Initialization failed\n"); | |
94 | } |