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> | |
| b14dc0f9 | 13 | #include <linux/etherdevice.h> |
| 8ee2bf9a | 14 | #include <linux/davinci_emac.h> |
| fd24f903 | 15 | #include <linux/dma-mapping.h> |
| 79c3c0b7 MG |
16 | |
| 17 | #include <asm/tlb.h> | |
| 18 | #include <asm/mach/map.h> | |
| 19 | ||
| 20 | #include <mach/common.h> | |
| b9ab1279 | 21 | #include <mach/cputype.h> |
| 79c3c0b7 MG |
22 | |
| 23 | struct davinci_soc_info davinci_soc_info; | |
| 24 | EXPORT_SYMBOL(davinci_soc_info); | |
| 25 | ||
| 3347db83 | 26 | static int __init davinci_init_id(struct davinci_soc_info *soc_info) |
| b9ab1279 | 27 | { |
| 3347db83 CC |
28 | int i; |
| 29 | struct davinci_id *dip; | |
| 30 | u8 variant; | |
| 31 | u16 part_no; | |
| 32 | void __iomem *base; | |
| 33 | ||
| 34 | base = ioremap(soc_info->jtag_id_reg, SZ_4K); | |
| 35 | if (!base) { | |
| 36 | pr_err("Unable to map JTAG ID register\n"); | |
| 37 | return -ENOMEM; | |
| 38 | } | |
| 39 | ||
| 40 | soc_info->jtag_id = __raw_readl(base); | |
| 41 | iounmap(base); | |
| b9ab1279 | 42 | |
| 3347db83 CC |
43 | variant = (soc_info->jtag_id & 0xf0000000) >> 28; |
| 44 | part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; | |
| 45 | ||
| 46 | for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; | |
| b9ab1279 MG |
47 | i++, dip++) |
| 48 | /* Don't care about the manufacturer right now */ | |
| 3347db83 CC |
49 | if ((dip->part_no == part_no) && (dip->variant == variant)) { |
| 50 | soc_info->cpu_id = dip->cpu_id; | |
| 51 | pr_info("DaVinci %s variant 0x%x\n", dip->name, | |
| 52 | dip->variant); | |
| 53 | return 0; | |
| 54 | } | |
| 55 | ||
| 56 | pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); | |
| 57 | return -EINVAL; | |
| b9ab1279 MG |
58 | } |
| 59 | ||
| 1a6d490b | 60 | void __init davinci_common_init(const struct davinci_soc_info *soc_info) |
| 79c3c0b7 MG |
61 | { |
| 62 | int ret; | |
| 63 | ||
| 64 | if (!soc_info) { | |
| 65 | ret = -EINVAL; | |
| 66 | goto err; | |
| 67 | } | |
| 68 | ||
| 69 | memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); | |
| 70 | ||
| 71 | if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) | |
| 72 | iotable_init(davinci_soc_info.io_desc, | |
| 73 | davinci_soc_info.io_desc_num); | |
| 74 | ||
| 75 | /* | |
| 76 | * Normally devicemaps_init() would flush caches and tlb after | |
| 77 | * mdesc->map_io(), but we must also do it here because of the CPU | |
| 78 | * revision check below. | |
| 79 | */ | |
| 80 | local_flush_tlb_all(); | |
| 81 | flush_cache_all(); | |
| 82 | ||
| 83 | /* | |
| 84 | * We want to check CPU revision early for cpu_is_xxxx() macros. | |
| 85 | * IO space mapping must be initialized before we can do that. | |
| 86 | */ | |
| 3347db83 CC |
87 | ret = davinci_init_id(&davinci_soc_info); |
| 88 | if (ret < 0) | |
| b9ab1279 | 89 | goto err; |
| 79c3c0b7 | 90 | |
| 66e0c399 | 91 | |
| 79c3c0b7 MG |
92 | return; |
| 93 | ||
| 94 | err: | |
| 69872e93 | 95 | panic("davinci_common_init: SoC Initialization failed\n"); |
| 79c3c0b7 | 96 | } |
| 3aa3e840 SG |
97 | |
| 98 | void __init davinci_init_late(void) | |
| 99 | { | |
| 100 | davinci_cpufreq_init(); | |
| 3aa3e840 | 101 | } |