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> |
fd24f903 | 15 | #include <linux/dma-mapping.h> |
79c3c0b7 MG |
16 | |
17 | #include <asm/tlb.h> | |
18 | #include <asm/mach/map.h> | |
19 | ||
20 | #include <mach/common.h> | |
b9ab1279 | 21 | #include <mach/cputype.h> |
79c3c0b7 | 22 | |
66e0c399 MG |
23 | #include "clock.h" |
24 | ||
79c3c0b7 MG |
25 | struct davinci_soc_info davinci_soc_info; |
26 | EXPORT_SYMBOL(davinci_soc_info); | |
27 | ||
673dd36f | 28 | void __iomem *davinci_intc_base; |
0b0c4c2a | 29 | int davinci_intc_type; |
673dd36f | 30 | |
bec3c11b | 31 | void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context) |
b14dc0f9 MG |
32 | { |
33 | char *mac_addr = davinci_soc_info.emac_pdata->mac_addr; | |
34 | off_t offset = (off_t)context; | |
35 | ||
04b9665b AB |
36 | if (!IS_BUILTIN(CONFIG_NVMEM)) { |
37 | pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n"); | |
38 | return; | |
39 | } | |
40 | ||
b14dc0f9 | 41 | /* Read MAC addr from EEPROM */ |
bec3c11b | 42 | if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN) |
b14dc0f9 MG |
43 | pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr); |
44 | } | |
45 | ||
3347db83 | 46 | static int __init davinci_init_id(struct davinci_soc_info *soc_info) |
b9ab1279 | 47 | { |
3347db83 CC |
48 | int i; |
49 | struct davinci_id *dip; | |
50 | u8 variant; | |
51 | u16 part_no; | |
52 | void __iomem *base; | |
53 | ||
54 | base = ioremap(soc_info->jtag_id_reg, SZ_4K); | |
55 | if (!base) { | |
56 | pr_err("Unable to map JTAG ID register\n"); | |
57 | return -ENOMEM; | |
58 | } | |
59 | ||
60 | soc_info->jtag_id = __raw_readl(base); | |
61 | iounmap(base); | |
b9ab1279 | 62 | |
3347db83 CC |
63 | variant = (soc_info->jtag_id & 0xf0000000) >> 28; |
64 | part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; | |
65 | ||
66 | for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; | |
b9ab1279 MG |
67 | i++, dip++) |
68 | /* Don't care about the manufacturer right now */ | |
3347db83 CC |
69 | if ((dip->part_no == part_no) && (dip->variant == variant)) { |
70 | soc_info->cpu_id = dip->cpu_id; | |
71 | pr_info("DaVinci %s variant 0x%x\n", dip->name, | |
72 | dip->variant); | |
73 | return 0; | |
74 | } | |
75 | ||
76 | pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); | |
77 | return -EINVAL; | |
b9ab1279 MG |
78 | } |
79 | ||
79c3c0b7 MG |
80 | void __init davinci_common_init(struct davinci_soc_info *soc_info) |
81 | { | |
82 | int ret; | |
83 | ||
84 | if (!soc_info) { | |
85 | ret = -EINVAL; | |
86 | goto err; | |
87 | } | |
88 | ||
89 | memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); | |
90 | ||
91 | if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) | |
92 | iotable_init(davinci_soc_info.io_desc, | |
93 | davinci_soc_info.io_desc_num); | |
94 | ||
95 | /* | |
96 | * Normally devicemaps_init() would flush caches and tlb after | |
97 | * mdesc->map_io(), but we must also do it here because of the CPU | |
98 | * revision check below. | |
99 | */ | |
100 | local_flush_tlb_all(); | |
101 | flush_cache_all(); | |
102 | ||
103 | /* | |
104 | * We want to check CPU revision early for cpu_is_xxxx() macros. | |
105 | * IO space mapping must be initialized before we can do that. | |
106 | */ | |
3347db83 CC |
107 | ret = davinci_init_id(&davinci_soc_info); |
108 | if (ret < 0) | |
b9ab1279 | 109 | goto err; |
79c3c0b7 | 110 | |
66e0c399 MG |
111 | if (davinci_soc_info.cpu_clks) { |
112 | ret = davinci_clk_init(davinci_soc_info.cpu_clks); | |
113 | ||
114 | if (ret != 0) | |
115 | goto err; | |
116 | } | |
117 | ||
79c3c0b7 MG |
118 | return; |
119 | ||
120 | err: | |
69872e93 | 121 | panic("davinci_common_init: SoC Initialization failed\n"); |
79c3c0b7 | 122 | } |
3aa3e840 SG |
123 | |
124 | void __init davinci_init_late(void) | |
125 | { | |
126 | davinci_cpufreq_init(); | |
127 | davinci_pm_init(); | |
128 | davinci_clk_disable_unused(); | |
129 | } |