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