/******************************************************************************
*
* GPL LICENSE SUMMARY
*
* Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
* USA
*
* The full GNU General Public License is included in this distribution
* in the file called LICENSE.GPL.
*
* Contact Information:
* Intel Linux Wireless <ilw@linux.intel.com>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*
*****************************************************************************/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/sched.h>
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-helpers.h"
#include "iwl-4965-hw.h"
#include "iwl-4965.h"
#include "iwl-4965-calib.h"
#define IL_AC_UNSET -1
/**
* il_verify_inst_sparse - verify runtime uCode image in card vs. host,
* using sample data 100 bytes apart. If these sample points are good,
* it's a pretty good bet that everything between them is good, too.
*/
static int
il4965_verify_inst_sparse(struct il_priv *il, __le32 *image, u32 len)
{
u32 val;
int ret = 0;
u32 errcnt = 0;
u32 i;
IL_DEBUG_INFO(il, "ucode inst image size is %u\n", len);
for (i = 0; i < len; i += 100, image += 100/sizeof(u32)) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IL_DL_IO is set */
il_write_direct32(il, HBUS_TARG_MEM_RADDR,
i + IWL4965_RTC_INST_LOWER_BOUND);
val = _il_read_direct32(il, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
ret = -EIO;
errcnt++;
if (errcnt >= 3)
break;
}
}
return ret;
}
/**
* il4965_verify_inst_full - verify runtime uCode image in card vs. host,
* looking at all data.
*/
static int il4965_verify_inst_full(struct il_priv *il, __le32 *image,
u32 len)
{
u32 val;
u32 save_len = len;
int ret = 0;
u32 errcnt;
IL_DEBUG_INFO(il, "ucode inst image size is %u\n", len);
il_write_direct32(il, HBUS_TARG_MEM_RADDR,
IWL4965_RTC_INST_LOWER_BOUND);
errcnt = 0;
for (; len > 0; len -= sizeof(u32), image++) {
/* read data comes through single port, auto-incr addr */
/* NOTE: Use the debugless read so we don't flood kernel log
* if IL_DL_IO is set */
val = _il_read_direct32(il, HBUS_TARG_MEM_RDAT);
if (val != le32_to_cpu(*image)) {
IL_ERR(il, "uCode INST section is invalid at "
"offset 0x%x, is 0x%x, s/b 0x%x\n",
save_len - len, val, le32_to_cpu(*image));
ret = -EIO;
errcnt++;
if (errcnt >= 20)
break;
}
}
if (!errcnt)
IL_DEBUG_INFO(il,
"ucode image in INSTRUCTION memory is good\n");
return ret;
}
/**
* il4965_verify_ucode - determine which instruction image is in SRAM,
* and verify its contents
*/
int il4965_verify_ucode(struct il_priv *il)
{
__le32 *image;
u32 len;
int ret;
/* Try bootstrap */
image = (__le32 *)il->ucode_boot.v_addr;
len = il->ucode_boot.len;
ret = il4965_verify_inst_sparse(il, image, len);
if (!ret) {
IL_DEBUG_INFO(il, "Bootstrap uCode is good in inst SRAM\n");
return 0;
}
/* Try initialize */
image = (__le32 *)il->ucode_init.v_addr;
len = il->ucode_init.len;
ret = il4965_verify_inst_sparse(il, image, len);
if (!ret) {
IL_DEBUG_INFO(il, "Initialize uCode is good in inst SRAM\n");
return 0;
}
/* Try runtime/protocol */
image = (__le32 *)il->ucode_code.v_addr;
len = il->ucode_code.len;
ret = il4965_verify_inst_sparse(il, image, len);
if (!ret) {
IL_DEBUG_INFO(il, "Runtime uCode is good in inst SRAM\n");
return 0;
}
IL_ERR(il, "NO VALID UCODE IMAGE IN INSTRUCTION SRAM!!\n");
/* Since nothing seems to match, show first several data entries in
* instruction SRAM, so maybe visual inspection will give a clue.
* Selection of bootstrap image (vs. other images) is arbitrary. */
image = (__le32 *)il->ucode_boot.v_addr;
len = il->ucode_boot.len;
ret = il4965_verify_inst_full(il, image, len);
return ret;
}
