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101 lines
2.3 KiB
101 lines
2.3 KiB
/* |
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* Code commons to all DaVinci SoCs. |
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* |
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* Author: Mark A. Greer <[email protected]> |
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* |
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* 2009 (c) MontaVista Software, Inc. This file is licensed under |
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* the terms of the GNU General Public License version 2. This program |
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* is licensed "as is" without any warranty of any kind, whether express |
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* or implied. |
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*/ |
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#include <linux/module.h> |
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#include <linux/io.h> |
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#include <linux/etherdevice.h> |
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#include <linux/davinci_emac.h> |
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#include <linux/dma-mapping.h> |
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#include <asm/tlb.h> |
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#include <asm/mach/map.h> |
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#include <mach/common.h> |
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#include <mach/cputype.h> |
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struct davinci_soc_info davinci_soc_info; |
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EXPORT_SYMBOL(davinci_soc_info); |
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static int __init davinci_init_id(struct davinci_soc_info *soc_info) |
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{ |
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int i; |
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struct davinci_id *dip; |
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u8 variant; |
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u16 part_no; |
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void __iomem *base; |
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base = ioremap(soc_info->jtag_id_reg, SZ_4K); |
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if (!base) { |
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pr_err("Unable to map JTAG ID register\n"); |
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return -ENOMEM; |
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} |
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soc_info->jtag_id = __raw_readl(base); |
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iounmap(base); |
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variant = (soc_info->jtag_id & 0xf0000000) >> 28; |
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part_no = (soc_info->jtag_id & 0x0ffff000) >> 12; |
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for (i = 0, dip = soc_info->ids; i < soc_info->ids_num; |
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i++, dip++) |
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/* Don't care about the manufacturer right now */ |
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if ((dip->part_no == part_no) && (dip->variant == variant)) { |
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soc_info->cpu_id = dip->cpu_id; |
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pr_info("DaVinci %s variant 0x%x\n", dip->name, |
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dip->variant); |
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return 0; |
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} |
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pr_err("Unknown DaVinci JTAG ID 0x%x\n", soc_info->jtag_id); |
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return -EINVAL; |
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} |
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void __init davinci_common_init(const struct davinci_soc_info *soc_info) |
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{ |
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int ret; |
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if (!soc_info) { |
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ret = -EINVAL; |
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goto err; |
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} |
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memcpy(&davinci_soc_info, soc_info, sizeof(struct davinci_soc_info)); |
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if (davinci_soc_info.io_desc && (davinci_soc_info.io_desc_num > 0)) |
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iotable_init(davinci_soc_info.io_desc, |
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davinci_soc_info.io_desc_num); |
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/* |
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* Normally devicemaps_init() would flush caches and tlb after |
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* mdesc->map_io(), but we must also do it here because of the CPU |
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* revision check below. |
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*/ |
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local_flush_tlb_all(); |
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flush_cache_all(); |
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/* |
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* We want to check CPU revision early for cpu_is_xxxx() macros. |
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* IO space mapping must be initialized before we can do that. |
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*/ |
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ret = davinci_init_id(&davinci_soc_info); |
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if (ret < 0) |
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goto err; |
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return; |
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err: |
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panic("davinci_common_init: SoC Initialization failed\n"); |
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} |
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void __init davinci_init_late(void) |
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{ |
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davinci_cpufreq_init(); |
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}
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