1 files changed, 166 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlegacy/iwl-4965-ucode.c b/drivers/net/wireless/iwlegacy/iwl-4965-ucode.c
new file mode 100644
index 000000000000..001d148feb94
--- /dev/null
+++ b/drivers/net/wireless/iwlegacy/iwl-4965-ucode.c
@@ -0,0 +1,166 @@
+/******************************************************************************
+ *
+ * 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 IWL_AC_UNSET -1
+
+/**
+ * iwl_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
+iwl4965_verify_inst_sparse(struct iwl_priv *priv, __le32 *image, u32 len)
+{
+        u32 val;
+        int ret = 0;
+        u32 errcnt = 0;
+        u32 i;
+
+        IWL_DEBUG_INFO(priv, "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 IWL_DL_IO is set */
+                iwl_legacy_write_direct32(priv, HBUS_TARG_MEM_RADDR,
+                        i + IWL4965_RTC_INST_LOWER_BOUND);
+                val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
+                if (val != le32_to_cpu(*image)) {
+                        ret = -EIO;
+                        errcnt++;
+                        if (errcnt >= 3)
+                                break;
+                }
+        }
+
+        return ret;
+}
+
+/**
+ * iwl4965_verify_inst_full - verify runtime uCode image in card vs. host,
+ *     looking at all data.
+ */
+static int iwl4965_verify_inst_full(struct iwl_priv *priv, __le32 *image,
+                                 u32 len)
+{
+        u32 val;
+        u32 save_len = len;
+        int ret = 0;
+        u32 errcnt;
+
+        IWL_DEBUG_INFO(priv, "ucode inst image size is %u\n", len);
+
+        iwl_legacy_write_direct32(priv, 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 IWL_DL_IO is set */
+                val = _iwl_legacy_read_direct32(priv, HBUS_TARG_MEM_RDAT);
+                if (val != le32_to_cpu(*image)) {
+                        IWL_ERR(priv, "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)
+                IWL_DEBUG_INFO(priv,
+                    "ucode image in INSTRUCTION memory is good\n");
+
+        return ret;
+}
+
+/**
+ * iwl4965_verify_ucode - determine which instruction image is in SRAM,
+ *    and verify its contents
+ */
+int iwl4965_verify_ucode(struct iwl_priv *priv)
+{
+        __le32 *image;
+        u32 len;
+        int ret;
+
+        /* Try bootstrap */
+        image = (__le32 *)priv->ucode_boot.v_addr;
+        len = priv->ucode_boot.len;
+        ret = iwl4965_verify_inst_sparse(priv, image, len);
+        if (!ret) {
+                IWL_DEBUG_INFO(priv, "Bootstrap uCode is good in inst SRAM\n");
+                return 0;
+        }
+
+        /* Try initialize */
+        image = (__le32 *)priv->ucode_init.v_addr;
+        len = priv->ucode_init.len;
+        ret = iwl4965_verify_inst_sparse(priv, image, len);
+        if (!ret) {
+                IWL_DEBUG_INFO(priv, "Initialize uCode is good in inst SRAM\n");
+                return 0;
+        }
+
+        /* Try runtime/protocol */
+        image = (__le32 *)priv->ucode_code.v_addr;
+        len = priv->ucode_code.len;
+        ret = iwl4965_verify_inst_sparse(priv, image, len);
+        if (!ret) {
+                IWL_DEBUG_INFO(priv, "Runtime uCode is good in inst SRAM\n");
+                return 0;
+        }
+
+        IWL_ERR(priv, "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 *)priv->ucode_boot.v_addr;
+        len = priv->ucode_boot.len;
+        ret = iwl4965_verify_inst_full(priv, image, len);
+
+        return ret;
+}