Commit | Line | Data |
---|---|---|
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> | |
b14dc0f9 | 13 | #include <linux/etherdevice.h> |
8ee2bf9a | 14 | #include <linux/davinci_emac.h> |
79c3c0b7 MG |
15 | |
16 | #include <asm/tlb.h> | |
17 | #include <asm/mach/map.h> | |
18 | ||
19 | #include <mach/common.h> | |
b9ab1279 | 20 | #include <mach/cputype.h> |
79c3c0b7 | 21 | |
66e0c399 MG |
22 | #include "clock.h" |
23 | ||
79c3c0b7 MG |
24 | struct davinci_soc_info davinci_soc_info; |
25 | EXPORT_SYMBOL(davinci_soc_info); | |
26 | ||
673dd36f | 27 | void __iomem *davinci_intc_base; |
0b0c4c2a | 28 | int davinci_intc_type; |
673dd36f | 29 | |
b14dc0f9 MG |
30 | void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context) |
31 | { | |
32 | char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; | |
33 | off_t offset = (off_t)context; | |
34 | ||
35 | /* Read MAC addr from EEPROM */ | |
36 | if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN) | |
37 | pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); | |
38 | } | |
39 | ||
3347db83 | 40 | static int __init davinci_init_id(struct davinci_soc_info *soc_info) |
b9ab1279 | 41 | { |
3347db83 CC |
42 | int i; |
43 | struct davinci_id *dip; | |
44 | u8 variant; | |
45 | u16 part_no; | |
46 | void __iomem *base; | |
47 | ||
48 | base = ioremap(soc_info->jtag_id_reg, SZ_4K); | |
49 | if (!base) { | |
50 | pr_err("Unable to map JTAG ID register\n"); | |
51 | return -ENOMEM; | |
52 | } | |
53 | ||
54 | soc_info->jtag_id = __raw_readl(base); | |
55 | iounmap(base); | |
b9ab1279 | 56 | |
3347db83 CC |
57 | variant = (soc_info->jtag_id & 0xf0000000) >> 28; |
58 | part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; | |
59 | ||
60 | for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; | |
b9ab1279 MG |
61 | i++, dip++) |
62 | /* Don't care about the manufacturer right now */ | |
3347db83 CC |
63 | if ((dip->part_no == part_no) && (dip->variant == variant)) { |
64 | soc_info->cpu_id = dip->cpu_id; | |
65 | pr_info("DaVinci %s variant 0x%x\n", dip->name, | |
66 | dip->variant); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); | |
71 | return -EINVAL; | |
b9ab1279 MG |
72 | } |
73 | ||
79c3c0b7 MG |
74 | void __init davinci_common_init(struct davinci_soc_info *soc_info) |
75 | { | |
76 | int ret; | |
77 | ||
78 | if (!soc_info) { | |
79 | ret = -EINVAL; | |
80 | goto err; | |
81 | } | |
82 | ||
83 | memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); | |
84 | ||
85 | if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) | |
86 | iotable_init(davinci_soc_info.io_desc, | |
87 | davinci_soc_info.io_desc_num); | |
88 | ||
89 | /* | |
90 | * Normally devicemaps_init() would flush caches and tlb after | |
91 | * mdesc->map_io(), but we must also do it here because of the CPU | |
92 | * revision check below. | |
93 | */ | |
94 | local_flush_tlb_all(); | |
95 | flush_cache_all(); | |
96 | ||
c78a5bc2 CC |
97 | if (!davinci_soc_info.reset) |
98 | davinci_soc_info.reset = davinci_watchdog_reset; | |
99 | ||
79c3c0b7 MG |
100 | /* |
101 | * We want to check CPU revision early for cpu_is_xxxx() macros. | |
102 | * IO space mapping must be initialized before we can do that. | |
103 | */ | |
3347db83 CC |
104 | ret = davinci_init_id(&davinci_soc_info); |
105 | if (ret < 0) | |
b9ab1279 | 106 | goto err; |
79c3c0b7 | 107 | |
66e0c399 MG |
108 | if (davinci_soc_info.cpu_clks) { |
109 | ret = davinci_clk_init(davinci_soc_info.cpu_clks); | |
110 | ||
111 | if (ret != 0) | |
112 | goto err; | |
113 | } | |
114 | ||
673dd36f | 115 | davinci_intc_base = davinci_soc_info.intc_base; |
0b0c4c2a | 116 | davinci_intc_type = davinci_soc_info.intc_type; |
79c3c0b7 MG |
117 | return; |
118 | ||
119 | err: | |
69872e93 | 120 | panic("davinci_common_init: SoC Initialization failed\n"); |
79c3c0b7 | 121 | } |