Logo Search packages:      
Sourcecode: linux version File versions  Download package

common.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 <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();

      if (!davinci_soc_info.reset)
            davinci_soc_info.reset = davinci_watchdog_reset;

      /*
       * 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");
}

Generated by  Doxygen 1.6.0   Back to index