Merge tag 'iwlwifi-next-for-kalle-2016-07-01' of git://git.kernel.org/pub/scm/linux...
[sfrench/cifs-2.6.git] / arch / arm / mach-davinci / common.c
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
25 struct davinci_soc_info davinci_soc_info;
26 EXPORT_SYMBOL(davinci_soc_info);
27
28 void __iomem *davinci_intc_base;
29 int davinci_intc_type;
30
31 void davinci_get_mac_addr(struct nvmem_device *nvmem, void *context)
32 {
33         char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
34         off_t offset = (off_t)context;
35
36         if (!IS_BUILTIN(CONFIG_NVMEM)) {
37                 pr_warn("Cannot read MAC addr from EEPROM without CONFIG_NVMEM\n");
38                 return;
39         }
40
41         /* Read MAC addr from EEPROM */
42         if (nvmem_device_read(nvmem, offset, ETH_ALEN, mac_addr) == ETH_ALEN)
43                 pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
44 }
45
46 static int __init davinci_init_id(struct davinci_soc_info *soc_info)
47 {
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);
62
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;
67                         i++, dip++)
68                 /* Don't care about the manufacturer right now */
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;
78 }
79
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          */
107         ret = davinci_init_id(&davinci_soc_info);
108         if (ret < 0)
109                 goto err;
110
111
112         return;
113
114 err:
115         panic("davinci_common_init: SoC Initialization failed\n");
116 }
117
118 void __init davinci_init_late(void)
119 {
120         davinci_cpufreq_init();
121         davinci_pm_init();
122         davinci_clk_disable_unused();
123 }