1 // SPDX-License-Identifier: GPL-2.0-only
3 * Code commons to all DaVinci SoCs.
5 * Author: Mark A. Greer <mgreer@mvista.com>
7 * 2009 (c) MontaVista Software, Inc.
9 #include <linux/module.h>
11 #include <linux/etherdevice.h>
12 #include <linux/davinci_emac.h>
13 #include <linux/dma-mapping.h>
16 #include <asm/mach/map.h>
18 #include <mach/common.h>
19 #include <mach/cputype.h>
21 struct davinci_soc_info davinci_soc_info;
22 EXPORT_SYMBOL(davinci_soc_info);
24 static int __init davinci_init_id(struct davinci_soc_info *soc_info)
27 struct davinci_id *dip;
32 base = ioremap(soc_info->jtag_id_reg, SZ_4K);
34 pr_err("Unable to map JTAG ID register\n");
38 soc_info->jtag_id = __raw_readl(base);
41 variant = (soc_info->jtag_id & 0xf0000000) >> 28;
42 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
44 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
46 /* Don't care about the manufacturer right now */
47 if ((dip->part_no == part_no) && (dip->variant == variant)) {
48 soc_info->cpu_id = dip->cpu_id;
49 pr_info("DaVinci %s variant 0x%x\n", dip->name,
54 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
58 void __init davinci_common_init(const struct davinci_soc_info *soc_info)
67 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
69 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
70 iotable_init(davinci_soc_info.io_desc,
71 davinci_soc_info.io_desc_num);
74 * Normally devicemaps_init() would flush caches and tlb after
75 * mdesc->map_io(), but we must also do it here because of the CPU
76 * revision check below.
78 local_flush_tlb_all();
82 * We want to check CPU revision early for cpu_is_xxxx() macros.
83 * IO space mapping must be initialized before we can do that.
85 ret = davinci_init_id(&davinci_soc_info);
93 panic("davinci_common_init: SoC Initialization failed\n");
96 void __init davinci_init_late(void)
98 davinci_cpufreq_init();