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