124 lines
2.9 KiB
C
124 lines
2.9 KiB
C
/*
|
|
* 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 <mach/common.h>
|
|
#include <mach/cputype.h>
|
|
|
|
#include "clock.h"
|
|
|
|
struct davinci_soc_info davinci_soc_info;
|
|
EXPORT_SYMBOL(davinci_soc_info);
|
|
|
|
void __iomem *davinci_intc_base;
|
|
int davinci_intc_type;
|
|
|
|
void davinci_get_mac_addr(struct memory_accessor *mem_acc, void *context)
|
|
{
|
|
char *mac_addr = davinci_soc_info.emac_pdata->mac_addr;
|
|
off_t offset = (off_t)context;
|
|
|
|
/* Read MAC addr from EEPROM */
|
|
if (mem_acc->read(mem_acc, mac_addr, offset, ETH_ALEN) == ETH_ALEN)
|
|
pr_info("Read MAC addr from EEPROM: %pM\n", mac_addr);
|
|
}
|
|
|
|
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(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;
|
|
|
|
if (davinci_soc_info.cpu_clks) {
|
|
ret = davinci_clk_init(davinci_soc_info.cpu_clks);
|
|
|
|
if (ret != 0)
|
|
goto err;
|
|
}
|
|
|
|
return;
|
|
|
|
err:
|
|
panic("davinci_common_init: SoC Initialization failed\n");
|
|
}
|
|
|
|
void __init davinci_init_late(void)
|
|
{
|
|
davinci_cpufreq_init();
|
|
davinci_pm_init();
|
|
davinci_clk_disable_unused();
|
|
}
|