1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Code commons to all DaVinci SoCs.
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * Author: Mark A. Greer <mgreer@mvista.com>
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * 2009 (c) MontaVista Software, Inc. This file is licensed under
7*4882a593Smuzhiyun * the terms of the GNU General Public License version 2. This program
8*4882a593Smuzhiyun * is licensed "as is" without any warranty of any kind, whether express
9*4882a593Smuzhiyun * or implied.
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun #include <linux/module.h>
12*4882a593Smuzhiyun #include <linux/io.h>
13*4882a593Smuzhiyun #include <linux/etherdevice.h>
14*4882a593Smuzhiyun #include <linux/davinci_emac.h>
15*4882a593Smuzhiyun #include <linux/dma-mapping.h>
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <asm/tlb.h>
18*4882a593Smuzhiyun #include <asm/mach/map.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #include <mach/common.h>
21*4882a593Smuzhiyun #include <mach/cputype.h>
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun struct davinci_soc_info davinci_soc_info;
24*4882a593Smuzhiyun EXPORT_SYMBOL(davinci_soc_info);
25*4882a593Smuzhiyun
davinci_init_id(struct davinci_soc_info * soc_info)26*4882a593Smuzhiyun static int __init davinci_init_id(struct davinci_soc_info *soc_info)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun int i;
29*4882a593Smuzhiyun struct davinci_id *dip;
30*4882a593Smuzhiyun u8 variant;
31*4882a593Smuzhiyun u16 part_no;
32*4882a593Smuzhiyun void __iomem *base;
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun base = ioremap(soc_info->jtag_id_reg, SZ_4K);
35*4882a593Smuzhiyun if (!base) {
36*4882a593Smuzhiyun pr_err("Unable to map JTAG ID register\n");
37*4882a593Smuzhiyun return -ENOMEM;
38*4882a593Smuzhiyun }
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun soc_info->jtag_id = __raw_readl(base);
41*4882a593Smuzhiyun iounmap(base);
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun variant = (soc_info->jtag_id & 0xf0000000) >> 28;
44*4882a593Smuzhiyun part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
47*4882a593Smuzhiyun i++, dip++)
48*4882a593Smuzhiyun /* Don't care about the manufacturer right now */
49*4882a593Smuzhiyun if ((dip->part_no == part_no) && (dip->variant == variant)) {
50*4882a593Smuzhiyun soc_info->cpu_id = dip->cpu_id;
51*4882a593Smuzhiyun pr_info("DaVinci %s variant 0x%x\n", dip->name,
52*4882a593Smuzhiyun dip->variant);
53*4882a593Smuzhiyun return 0;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
57*4882a593Smuzhiyun return -EINVAL;
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
davinci_common_init(const struct davinci_soc_info * soc_info)60*4882a593Smuzhiyun void __init davinci_common_init(const struct davinci_soc_info *soc_info)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun int ret;
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun if (!soc_info) {
65*4882a593Smuzhiyun ret = -EINVAL;
66*4882a593Smuzhiyun goto err;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
69*4882a593Smuzhiyun memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
72*4882a593Smuzhiyun iotable_init(davinci_soc_info.io_desc,
73*4882a593Smuzhiyun davinci_soc_info.io_desc_num);
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun /*
76*4882a593Smuzhiyun * Normally devicemaps_init() would flush caches and tlb after
77*4882a593Smuzhiyun * mdesc->map_io(), but we must also do it here because of the CPU
78*4882a593Smuzhiyun * revision check below.
79*4882a593Smuzhiyun */
80*4882a593Smuzhiyun local_flush_tlb_all();
81*4882a593Smuzhiyun flush_cache_all();
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun /*
84*4882a593Smuzhiyun * We want to check CPU revision early for cpu_is_xxxx() macros.
85*4882a593Smuzhiyun * IO space mapping must be initialized before we can do that.
86*4882a593Smuzhiyun */
87*4882a593Smuzhiyun ret = davinci_init_id(&davinci_soc_info);
88*4882a593Smuzhiyun if (ret < 0)
89*4882a593Smuzhiyun goto err;
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun return;
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun err:
95*4882a593Smuzhiyun panic("davinci_common_init: SoC Initialization failed\n");
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
davinci_init_late(void)98*4882a593Smuzhiyun void __init davinci_init_late(void)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun davinci_cpufreq_init();
101*4882a593Smuzhiyun }
102