projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 79c3c0b7 MG |
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 | ||
| 14 | #include <asm/tlb.h> | |
| 15 | #include <asm/mach/map.h> | |
| 16 | ||
| 17 | #include <mach/common.h> | |
| b9ab1279 | 18 | #include <mach/cputype.h> |
| 79c3c0b7 | 19 | |
| 66e0c399 MG |
20 | #include "clock.h" |
| 21 | ||
| 79c3c0b7 MG |
22 | struct davinci_soc_info davinci_soc_info; |
| 23 | EXPORT_SYMBOL(davinci_soc_info); | |
| 24 | ||
| b9ab1279 MG |
25 | static struct davinci_id * __init davinci_get_id(u32 jtag_id) |
| 26 | { | |
| 27 | int i; | |
| 28 | struct davinci_id *dip; | |
| 29 | u8 variant = (jtag_id & 0xf0000000) >> 28; | |
| 30 | u16 part_no = (jtag_id & 0x0ffff000) >> 12; | |
| 31 | ||
| 32 | for (i = 0, dip = davinci_soc_info.ids; i < davinci_soc_info.ids_num; | |
| 33 | i++, dip++) | |
| 34 | /* Don't care about the manufacturer right now */ | |
| 35 | if ((dip->part_no == part_no) && (dip->variant == variant)) | |
| 36 | return dip; | |
| 37 | ||
| 38 | return NULL; | |
| 39 | } | |
| 40 | ||
| 79c3c0b7 MG |
41 | void __init davinci_common_init(struct davinci_soc_info *soc_info) |
| 42 | { | |
| 43 | int ret; | |
| b9ab1279 | 44 | struct davinci_id *dip; |
| 79c3c0b7 MG |
45 | |
| 46 | if (!soc_info) { | |
| 47 | ret = -EINVAL; | |
| 48 | goto err; | |
| 49 | } | |
| 50 | ||
| 51 | memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); | |
| 52 | ||
| 53 | if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) | |
| 54 | iotable_init(davinci_soc_info.io_desc, | |
| 55 | davinci_soc_info.io_desc_num); | |
| 56 | ||
| 57 | /* | |
| 58 | * Normally devicemaps_init() would flush caches and tlb after | |
| 59 | * mdesc->map_io(), but we must also do it here because of the CPU | |
| 60 | * revision check below. | |
| 61 | */ | |
| 62 | local_flush_tlb_all(); | |
| 63 | flush_cache_all(); | |
| 64 | ||
| 65 | /* | |
| 66 | * We want to check CPU revision early for cpu_is_xxxx() macros. | |
| 67 | * IO space mapping must be initialized before we can do that. | |
| 68 | */ | |
| b9ab1279 MG |
69 | davinci_soc_info.jtag_id = __raw_readl(davinci_soc_info.jtag_id_base); |
| 70 | ||
| 71 | dip = davinci_get_id(davinci_soc_info.jtag_id); | |
| 72 | if (!dip) { | |
| 73 | ret = -EINVAL; | |
| 74 | goto err; | |
| 75 | } | |
| 76 | ||
| 77 | davinci_soc_info.cpu_id = dip->cpu_id; | |
| 78 | pr_info("DaVinci %s variant 0x%x\n", dip->name, dip->variant); | |
| 79c3c0b7 | 79 | |
| 66e0c399 MG |
80 | if (davinci_soc_info.cpu_clks) { |
| 81 | ret = davinci_clk_init(davinci_soc_info.cpu_clks); | |
| 82 | ||
| 83 | if (ret != 0) | |
| 84 | goto err; | |
| 85 | } | |
| 86 | ||
| 79c3c0b7 MG |
87 | return; |
| 88 | ||
| 89 | err: | |
| 90 | pr_err("davinci_common_init: SoC Initialization failed\n"); | |
| 91 | } |