/******************************************************************************
 *
 * Copyright(c) 2007 - 2012 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.
 *
 * 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/delay.h>
#include <linux/sched.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/mac80211.h>
#include <linux/etherdevice.h>
#include <asm/unaligned.h>
#include <linux/stringify.h>

#include "iwl-eeprom.h"
#include "iwl-dev.h"
#include "iwl-core.h"
#include "iwl-io.h"
#include "iwl-agn.h"
#include "iwl-agn-hw.h"
#include "iwl-trans.h"
#include "iwl-shared.h"
#include "iwl-cfg.h"
#include "iwl-prph.h"

/* Highest firmware API version supported */
#define IWL5000_UCODE_API_MAX 5
#define IWL5150_UCODE_API_MAX 2

/* Lowest firmware API version supported */
#define IWL5000_UCODE_API_MIN 1
#define IWL5150_UCODE_API_MIN 1

#define IWL5000_FW_PRE "iwlwifi-5000-"
#define IWL5000_MODULE_FIRMWARE(api) IWL5000_FW_PRE __stringify(api) ".ucode"

#define IWL5150_FW_PRE "iwlwifi-5150-"
#define IWL5150_MODULE_FIRMWARE(api) IWL5150_FW_PRE __stringify(api) ".ucode"

/* NIC configuration for 5000 series */
static void iwl5000_nic_config(struct iwl_priv *priv)
{
	iwl_rf_config(priv);

	/* W/A : NIC is stuck in a reset state after Early PCIe power off
	 * (PCIe power is lost before PERST# is asserted),
	 * causing ME FW to lose ownership and not being able to obtain it back.
	 */
	iwl_set_bits_mask_prph(trans(priv), APMG_PS_CTRL_REG,
				APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS,
				~APMG_PS_CTRL_EARLY_PWR_OFF_RESET_DIS);
}

static const struct iwl_sensitivity_ranges iwl5000_sensitivity = {
	.min_nrg_cck = 100,
	.auto_corr_min_ofdm = 90,
	.auto_corr_min_ofdm_mrc = 170,
	.auto_corr_min_ofdm_x1 = 105,
	.auto_corr_min_ofdm_mrc_x1 = 220,

	.auto_corr_max_ofdm = 120,
	.auto_corr_max_ofdm_mrc = 210,
	.auto_corr_max_ofdm_x1 = 120,
	.auto_corr_max_ofdm_mrc_x1 = 240,

	.auto_corr_min_cck = 125,
	.auto_corr_max_cck = 200,
	.auto_corr_min_cck_mrc = 200,
	.auto_corr_max_cck_mrc = 400,
	.nrg_th_cck = 100,
	.nrg_th_ofdm = 100,

	.barker_corr_th_min = 190,
	.barker_corr_th_min_mrc = 390,
	.nrg_th_cca = 62,
};

static struct iwl_sensitivity_ranges iwl5150_sensitivity = {
	.min_nrg_cck = 95,
	.auto_corr_min_ofdm = 90,
	.auto_corr_min_ofdm_mrc = 170,
	.auto_corr_min_ofdm_x1 = 105,
	.auto_corr_min_ofdm_mrc_x1 = 220,

	.auto_corr_max_ofdm = 120,
	.auto_corr_max_ofdm_mrc = 210,
	/* max = min for performance bug in 5150 DSP */
	.auto_corr_max_ofdm_x1 = 105,
	.auto_corr_max_ofdm_mrc_x1 = 220,

	.auto_corr_min_cck = 125,
	.auto_corr_max_cck = 200,
	.auto_corr_min_cck_mrc = 170,
	.auto_corr_max_cck_mrc = 400,
	.nrg_th_cck = 95,
	.nrg_th_ofdm = 95,

	.barker_corr_th_min = 190,
	.barker_corr_th_min_mrc = 390,
	.nrg_th_cca = 62,
};

#define IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF	(-5)

static s32 iwl_temp_calib_to_offset(struct iwl_priv *priv)
{
	u16 temperature, voltage;
	__le16 *temp_calib = (__le16 *)iwl_eeprom_query_addr(priv,
				EEPROM_KELVIN_TEMPERATURE);

	temperature = le16_to_cpu(temp_calib[0]);
	voltage = le16_to_cpu(temp_calib[1]);

	/* offset = temp - volt / coeff */
	return (s32)(temperature - voltage / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF);
}

static void iwl5150_set_ct_threshold(struct iwl_priv *priv)
{
	const s32 volt2temp_coef = IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF;
	s32 threshold = (s32)CELSIUS_TO_KELVIN(CT_KILL_THRESHOLD_LEGACY) -
			iwl_temp_calib_to_offset(priv);

	priv->hw_params.ct_kill_threshold = threshold * volt2temp_coef;
}

static void iwl5000_set_ct_threshold(struct iwl_priv *priv)
{
	/* want Celsius */
	priv->hw_params.ct_kill_threshold = CT_KILL_THRESHOLD_LEGACY;
}

static void iwl5000_hw_set_hw_params(struct iwl_priv *priv)
{
	priv->hw_params.ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
					BIT(IEEE80211_BAND_5GHZ);

	priv->hw_params.tx_chains_num =
		num_of_ant(priv->hw_params.valid_tx_ant);
	priv->hw_params.rx_chains_num =
		num_of_ant(priv->hw_params.valid_rx_ant);

	iwl5000_set_ct_threshold(priv);

	/* Set initial sensitivity parameters */
	priv->hw_params.sens = &iwl5000_sensitivity;
}

static void iwl5150_hw_set_hw_params(struct iwl_priv *priv)
{
	priv->hw_params.ht40_channel =  BIT(IEEE80211_BAND_2GHZ) |
					BIT(IEEE80211_BAND_5GHZ);

	priv->hw_params.tx_chains_num =
		num_of_ant(priv->hw_params.valid_tx_ant);
	priv->hw_params.rx_chains_num =
		num_of_ant(priv->hw_params.valid_rx_ant);

	iwl5150_set_ct_threshold(priv);

	/* Set initial sensitivity parameters */
	priv->hw_params.sens = &iwl5150_sensitivity;
}

static void iwl5150_temperature(struct iwl_priv *priv)
{
	u32 vt = 0;
	s32 offset =  iwl_temp_calib_to_offset(priv);

	vt = le32_to_cpu(priv->statistics.common.temperature);
	vt = vt / IWL_5150_VOLTAGE_TO_TEMPERATURE_COEFF + offset;
	/* now vt hold the temperature in Kelvin */
	priv->temperature = KELVIN_TO_CELSIUS(vt);
	iwl_tt_handler(priv);
}

static int iwl5000_hw_channel_switch(struct iwl_priv *priv,
				     struct ieee80211_channel_switch *ch_switch)
{
	/*
	 * MULTI-FIXME
	 * See iwlagn_mac_channel_switch.
	 */
	struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
	struct iwl5000_channel_switch_cmd cmd;
	const struct iwl_channel_info *ch_info;
	u32 switch_time_in_usec, ucode_switch_time;
	u16 ch;
	u32 tsf_low;
	u8 switch_count;
	u16 beacon_interval = le16_to_cpu(ctx->timing.beacon_interval);
	struct ieee80211_vif *vif = ctx->vif;
	struct iwl_host_cmd hcmd = {
		.id = REPLY_CHANNEL_SWITCH,
		.len = { sizeof(cmd), },
		.flags = CMD_SYNC,
		.data = { &cmd, },
	};

	cmd.band = priv->band == IEEE80211_BAND_2GHZ;
	ch = ch_switch->channel->hw_value;
	IWL_DEBUG_11H(priv, "channel switch from %d to %d\n",
		      ctx->active.channel, ch);
	cmd.channel = cpu_to_le16(ch);
	cmd.rxon_flags = ctx->staging.flags;
	cmd.rxon_filter_flags = ctx->staging.filter_flags;
	switch_count = ch_switch->count;
	tsf_low = ch_switch->timestamp & 0x0ffffffff;
	/*
	 * calculate the ucode channel switch time
	 * adding TSF as one of the factor for when to switch
	 */
	if ((priv->ucode_beacon_time > tsf_low) && beacon_interval) {
		if (switch_count > ((priv->ucode_beacon_time - tsf_low) /
		    beacon_interval)) {
			switch_count -= (priv->ucode_beacon_time -
				tsf_low) / beacon_interval;
		} else
			switch_count = 0;
	}
	if (switch_count <= 1)
		cmd.switch_time = cpu_to_le32(priv->ucode_beacon_time);
	else {
		switch_time_in_usec =
			vif->bss_conf.beacon_int * switch_count * TIME_UNIT;
		ucode_switch_time = iwl_usecs_to_beacons(priv,
							 switch_time_in_usec,
							 beacon_interval);
		cmd.switch_time = iwl_add_beacon_time(priv,
						      priv->ucode_beacon_time,
						      ucode_switch_time,
						      beacon_interval);
	}
	IWL_DEBUG_11H(priv, "uCode time for the switch is 0x%x\n",
		      cmd.switch_time);
	ch_info = iwl_get_channel_info(priv, priv->band, ch);
	if (ch_info)
		cmd.expect_beacon = is_channel_radar(ch_info);
	else {
		IWL_ERR(priv, "invalid channel switch from %u to %u\n",
			ctx->active.channel, ch);
		return -EFAULT;
	}

	return iwl_dvm_send_cmd(priv, &hcmd);
}

static struct iwl_lib_ops iwl5000_lib = {
	.set_hw_params = iwl5000_hw_set_hw_params,
	.set_channel_switch = iwl5000_hw_channel_switch,
	.nic_config = iwl5000_nic_config,
	.eeprom_ops = {
		.regulatory_bands = {
			EEPROM_REG_BAND_1_CHANNELS,
			EEPROM_REG_BAND_2_CHANNELS,
			EEPROM_REG_BAND_3_CHANNELS,
			EEPROM_REG_BAND_4_CHANNELS,
			EEPROM_REG_BAND_5_CHANNELS,
			EEPROM_REG_BAND_24_HT40_CHANNELS,
			EEPROM_REG_BAND_52_HT40_CHANNELS
		},
	},
	.temperature = iwlagn_temperature,
};

static struct iwl_lib_ops iwl5150_lib = {
	.set_hw_params = iwl5150_hw_set_hw_params,
	.set_channel_switch = iwl5000_hw_channel_switch,
	.nic_config = iwl5000_nic_config,
	.eeprom_ops = {
		.regulatory_bands = {
			EEPROM_REG_BAND_1_CHANNELS,
			EEPROM_REG_BAND_2_CHANNELS,
			EEPROM_REG_BAND_3_CHANNELS,
			EEPROM_REG_BAND_4_CHANNELS,
			EEPROM_REG_BAND_5_CHANNELS,
			EEPROM_REG_BAND_24_HT40_CHANNELS,
			EEPROM_REG_BAND_52_HT40_CHANNELS
		},
	},
	.temperature = iwl5150_temperature,
};

static const struct iwl_base_params iwl5000_base_params = {
	.eeprom_size = IWLAGN_EEPROM_IMG_SIZE,
	.num_of_queues = IWLAGN_NUM_QUEUES,
	.pll_cfg_val = CSR50_ANA_PLL_CFG_VAL,
	.led_compensation = 51,
	.plcp_delta_threshold = IWL_MAX_PLCP_ERR_LONG_THRESHOLD_DEF,
	.chain_noise_scale = 1000,
	.wd_timeout = IWL_WATCHHDOG_DISABLED,
	.max_event_log_size = 512,
	.no_idle_support = true,
};

static const struct iwl_ht_params iwl5000_ht_params = {
	.ht_greenfield_support = true,
};

#define IWL_DEVICE_5000						\
	.fw_name_pre = IWL5000_FW_PRE,				\
	.ucode_api_max = IWL5000_UCODE_API_MAX,			\
	.ucode_api_min = IWL5000_UCODE_API_MIN,			\
	.device_family = IWL_DEVICE_FAMILY_5000,		\
	.max_inst_size = IWLAGN_RTC_INST_SIZE,			\
	.max_data_size = IWLAGN_RTC_DATA_SIZE,			\
	.eeprom_ver = EEPROM_5000_EEPROM_VERSION,		\
	.eeprom_calib_ver = EEPROM_5000_TX_POWER_VERSION,	\
	.lib = &iwl5000_lib,					\
	.base_params = &iwl5000_base_params,			\
	.led_mode = IWL_LED_BLINK

const struct iwl_cfg iwl5300_agn_cfg = {
	.name = "Intel(R) Ultimate N WiFi Link 5300 AGN",
	IWL_DEVICE_5000,
	/* at least EEPROM 0x11A has wrong info */
	.valid_tx_ant = ANT_ABC,	/* .cfg overwrite */
	.valid_rx_ant = ANT_ABC,	/* .cfg overwrite */
	.ht_params = &iwl5000_ht_params,
};

const struct iwl_cfg iwl5100_bgn_cfg = {
	.name = "Intel(R) WiFi Link 5100 BGN",
	IWL_DEVICE_5000,
	.valid_tx_ant = ANT_B,		/* .cfg overwrite */
	.valid_rx_ant = ANT_AB,		/* .cfg overwrite */
	.ht_params = &iwl5000_ht_params,
};

const struct iwl_cfg iwl5100_abg_cfg = {
	.name = "Intel(R) WiFi Link 5100 ABG",
	IWL_DEVICE_5000,
	.valid_tx_ant = ANT_B,		/* .cfg overwrite */
	.valid_rx_ant = ANT_AB,		/* .cfg overwrite */
};

const struct iwl_cfg iwl5100_agn_cfg = {
	.name = "Intel(R) WiFi Link 5100 AGN",
	IWL_DEVICE_5000,
	.valid_tx_ant = ANT_B,		/* .cfg overwrite */
	.valid_rx_ant = ANT_AB,		/* .cfg overwrite */
	.ht_params = &iwl5000_ht_params,
};

const struct iwl_cfg iwl5350_agn_cfg = {
	.name = "Intel(R) WiMAX/WiFi Link 5350 AGN",
	.fw_name_pre = IWL5000_FW_PRE,
	.ucode_api_max = IWL5000_UCODE_API_MAX,
	.ucode_api_min = IWL5000_UCODE_API_MIN,
	.device_family = IWL_DEVICE_FAMILY_5000,
	.max_inst_size = IWLAGN_RTC_INST_SIZE,
	.max_data_size = IWLAGN_RTC_DATA_SIZE,
	.eeprom_ver = EEPROM_5050_EEPROM_VERSION,
	.eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,
	.lib = &iwl5000_lib,
	.base_params = &iwl5000_base_params,
	.ht_params = &iwl5000_ht_params,
	.led_mode = IWL_LED_BLINK,
	.internal_wimax_coex = true,
};

#define IWL_DEVICE_5150						\
	.fw_name_pre = IWL5150_FW_PRE,				\
	.ucode_api_max = IWL5150_UCODE_API_MAX,			\
	.ucode_api_min = IWL5150_UCODE_API_MIN,			\
	.device_family = IWL_DEVICE_FAMILY_5150,		\
	.max_inst_size = IWLAGN_RTC_INST_SIZE,			\
	.max_data_size = IWLAGN_RTC_DATA_SIZE,			\
	.eeprom_ver = EEPROM_5050_EEPROM_VERSION,		\
	.eeprom_calib_ver = EEPROM_5050_TX_POWER_VERSION,	\
	.lib = &iwl5150_lib,					\
	.base_params = &iwl5000_base_params,			\
	.no_xtal_calib = true,					\
	.led_mode = IWL_LED_BLINK,				\
	.internal_wimax_coex = true

const struct iwl_cfg iwl5150_agn_cfg = {
	.name = "Intel(R) WiMAX/WiFi Link 5150 AGN",
	IWL_DEVICE_5150,
	.ht_params = &iwl5000_ht_params,

};

const struct iwl_cfg iwl5150_abg_cfg = {
	.name = "Intel(R) WiMAX/WiFi Link 5150 ABG",
	IWL_DEVICE_5150,
};

MODULE_FIRMWARE(IWL5000_MODULE_FIRMWARE(IWL5000_UCODE_API_MAX));
MODULE_FIRMWARE(IWL5150_MODULE_FIRMWARE(IWL5150_UCODE_API_MAX));