/****************************************************************************** * * This file is provided under a dual BSD/GPLv2 license. When using or * redistributing this file, you may do so under either license. * * GPL LICENSE SUMMARY * * Copyright(c) 2008 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: * Tomas Winkler * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 * * BSD LICENSE * * Copyright(c) 2005 - 2008 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name Intel Corporation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *****************************************************************************/ #include #include #include #include #include #include "iwl-4965-commands.h" #include "iwl-4965.h" #include "iwl-core.h" #include "iwl-4965-debug.h" #include "iwl-eeprom.h" #include "iwl-4965-io.h" /****************************************************************************** * * EEPROM related functions * ******************************************************************************/ int iwlcore_eeprom_verify_signature(struct iwl4965_priv *priv) { u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP); if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) { IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp); return -ENOENT; } return 0; } EXPORT_SYMBOL(iwlcore_eeprom_verify_signature); /* * The device's EEPROM semaphore prevents conflicts between driver and uCode * when accessing the EEPROM; each access is a series of pulses to/from the * EEPROM chip, not a single event, so even reads could conflict if they * weren't arbitrated by the semaphore. */ int iwlcore_eeprom_acquire_semaphore(struct iwl4965_priv *priv) { u16 count; int ret; for (count = 0; count < EEPROM_SEM_RETRY_LIMIT; count++) { /* Request semaphore */ iwl4965_set_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); /* See if we got it */ ret = iwl4965_poll_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM, EEPROM_SEM_TIMEOUT); if (ret >= 0) { IWL_DEBUG_IO("Acquired semaphore after %d tries.\n", count+1); return ret; } } return ret; } EXPORT_SYMBOL(iwlcore_eeprom_acquire_semaphore); void iwlcore_eeprom_release_semaphore(struct iwl4965_priv *priv) { iwl4965_clear_bit(priv, CSR_HW_IF_CONFIG_REG, CSR_HW_IF_CONFIG_REG_BIT_EEPROM_OWN_SEM); } EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore); /** * iwl_eeprom_init - read EEPROM contents * * Load the EEPROM contents from adapter into priv->eeprom * * NOTE: This routine uses the non-debug IO access functions. */ int iwl_eeprom_init(struct iwl4965_priv *priv) { u16 *e = (u16 *)&priv->eeprom; u32 gp = iwl4965_read32(priv, CSR_EEPROM_GP); u32 r; int sz = sizeof(priv->eeprom); int ret; int i; u16 addr; /* The EEPROM structure has several padding buffers within it * and when adding new EEPROM maps is subject to programmer errors * which may be very difficult to identify without explicitly * checking the resulting size of the eeprom map. */ BUILD_BUG_ON(sizeof(priv->eeprom) != IWL_EEPROM_IMAGE_SIZE); if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) { IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp); return -ENOENT; } /* Make sure driver (instead of uCode) is allowed to read EEPROM */ ret = priv->cfg->ops->lib->eeprom_ops.acquire_semaphore(priv); if (ret < 0) { IWL_ERROR("Failed to acquire EEPROM semaphore.\n"); return -ENOENT; } /* eeprom is an array of 16bit values */ for (addr = 0; addr < sz; addr += sizeof(u16)) { _iwl4965_write32(priv, CSR_EEPROM_REG, addr << 1); _iwl4965_clear_bit(priv, CSR_EEPROM_REG, CSR_EEPROM_REG_BIT_CMD); for (i = 0; i < IWL_EEPROM_ACCESS_TIMEOUT; i += IWL_EEPROM_ACCESS_DELAY) { r = _iwl4965_read_direct32(priv, CSR_EEPROM_REG); if (r & CSR_EEPROM_REG_READ_VALID_MSK) break; udelay(IWL_EEPROM_ACCESS_DELAY); } if (!(r & CSR_EEPROM_REG_READ_VALID_MSK)) { IWL_ERROR("Time out reading EEPROM[%d]", addr); ret = -ETIMEDOUT; goto done; } e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16)); } ret = 0; done: priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv); return ret; } EXPORT_SYMBOL(iwl_eeprom_init); void iwl_eeprom_get_mac(const struct iwl4965_priv *priv, u8 *mac) { memcpy(mac, priv->eeprom.mac_address, 6); } EXPORT_SYMBOL(iwl_eeprom_get_mac);