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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Code commons to all DaVinci SoCs.
4 *
5 * Author: Mark A. Greer <mgreer@mvista.com>
6 *
7 * 2009 (c) MontaVista Software, Inc.
8 */
9#include <linux/module.h>
10#include <linux/io.h>
11#include <linux/etherdevice.h>
12#include <linux/davinci_emac.h>
13#include <linux/dma-mapping.h>
14#include <linux/platform_data/davinci-cpufreq.h>
15
16#include <asm/tlb.h>
17#include <asm/mach/map.h>
18
19#include "common.h"
20#include "cputype.h"
21
22struct davinci_soc_info davinci_soc_info;
23EXPORT_SYMBOL(davinci_soc_info);
24
25static int __init davinci_init_id(struct davinci_soc_info *soc_info)
26{
27 int i;
28 struct davinci_id *dip;
29 u8 variant;
30 u16 part_no;
31 void __iomem *base;
32
33 base = ioremap(soc_info->jtag_id_reg, SZ_4K);
34 if (!base) {
35 pr_err("Unable to map JTAG ID register\n");
36 return -ENOMEM;
37 }
38
39 soc_info->jtag_id = __raw_readl(base);
40 iounmap(base);
41
42 variant = (soc_info->jtag_id & 0xf0000000) >> 28;
43 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
44
45 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
46 i++, dip++)
47 /* Don't care about the manufacturer right now */
48 if ((dip->part_no == part_no) && (dip->variant == variant)) {
49 soc_info->cpu_id = dip->cpu_id;
50 pr_info("DaVinci %s variant 0x%x\n", dip->name,
51 dip->variant);
52 return 0;
53 }
54
55 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
56 return -EINVAL;
57}
58
59void __init davinci_common_init(const struct davinci_soc_info *soc_info)
60{
61 int ret;
62
63 if (!soc_info) {
64 ret = -EINVAL;
65 goto err;
66 }
67
68 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
69
70 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
71 iotable_init(davinci_soc_info.io_desc,
72 davinci_soc_info.io_desc_num);
73
74 /*
75 * Normally devicemaps_init() would flush caches and tlb after
76 * mdesc->map_io(), but we must also do it here because of the CPU
77 * revision check below.
78 */
79 local_flush_tlb_all();
80 flush_cache_all();
81
82 /*
83 * We want to check CPU revision early for cpu_is_xxxx() macros.
84 * IO space mapping must be initialized before we can do that.
85 */
86 ret = davinci_init_id(&davinci_soc_info);
87 if (ret < 0)
88 goto err;
89
90
91 return;
92
93err:
94 panic("davinci_common_init: SoC Initialization failed\n");
95}
96
97void __init davinci_init_late(void)
98{
99 davinci_cpufreq_init();
100}
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#include "clock.h"
24
25struct davinci_soc_info davinci_soc_info;
26EXPORT_SYMBOL(davinci_soc_info);
27
28void __iomem *davinci_intc_base;
29int davinci_intc_type;
30
31void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context)
32{
33 char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
34 off_t offset = (off_t)context;
35
36 /* Read MAC addr from EEPROM */
37 if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
38 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
39}
40
41static int __init davinci_init_id(struct davinci_soc_info *soc_info)
42{
43 int i;
44 struct davinci_id *dip;
45 u8 variant;
46 u16 part_no;
47 void __iomem *base;
48
49 base = ioremap(soc_info->jtag_id_reg, SZ_4K);
50 if (!base) {
51 pr_err("Unable to map JTAG ID register\n");
52 return -ENOMEM;
53 }
54
55 soc_info->jtag_id = __raw_readl(base);
56 iounmap(base);
57
58 variant = (soc_info->jtag_id & 0xf0000000) >> 28;
59 part_no = (soc_info->jtag_id & 0x0ffff000) >> 12;
60
61 for (i = 0, dip = soc_info->ids; i < soc_info->ids_num;
62 i++, dip++)
63 /* Don't care about the manufacturer right now */
64 if ((dip->part_no == part_no) && (dip->variant == variant)) {
65 soc_info->cpu_id = dip->cpu_id;
66 pr_info("DaVinci %s variant 0x%x\n", dip->name,
67 dip->variant);
68 return 0;
69 }
70
71 pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id);
72 return -EINVAL;
73}
74
75void __init davinci_common_init(struct davinci_soc_info *soc_info)
76{
77 int ret;
78
79 if (!soc_info) {
80 ret = -EINVAL;
81 goto err;
82 }
83
84 memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info));
85
86 if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0))
87 iotable_init(davinci_soc_info.io_desc,
88 davinci_soc_info.io_desc_num);
89
90 /*
91 * Normally devicemaps_init() would flush caches and tlb after
92 * mdesc->map_io(), but we must also do it here because of the CPU
93 * revision check below.
94 */
95 local_flush_tlb_all();
96 flush_cache_all();
97
98 /*
99 * We want to check CPU revision early for cpu_is_xxxx() macros.
100 * IO space mapping must be initialized before we can do that.
101 */
102 ret = davinci_init_id(&davinci_soc_info);
103 if (ret < 0)
104 goto err;
105
106 if (davinci_soc_info.cpu_clks) {
107 ret = davinci_clk_init(davinci_soc_info.cpu_clks);
108
109 if (ret != 0)
110 goto err;
111 }
112
113 return;
114
115err:
116 panic("davinci_common_init: SoC Initialization failed\n");
117}
118
119void __init davinci_init_late(void)
120{
121 davinci_cpufreq_init();
122 davinci_pm_init();
123 davinci_clk_disable_unused();
124}