#!/bin/sh -l
#===============================================================================
#
#  redpine_pre-up
#
#  Copyright (C) 2012 by Digi International Inc.
#  All rights reserved.
#
#  This program is free software; you can redistribute it and/or modify it
#  under the terms of the GNU General Public License version 2 as published by
#  the Free Software Foundation.
#
#
#  !Description: Load Redpine's wireless driver
#
#===============================================================================

set -e

# Driver Mode
#  (1) WiFi mode
#  (2) RF Eval mode
#DRIVER_MODE="1"

# BT Coexistence
#  (0) disable
#  (1) enable
#BT_COEXISTENCE="0"

# SDIO Clock frequency (MHz)
#SDIO_CLK="20"

# High speed mode
#  (0) disable
#  (1) enable
#ENABLE_HIGH_SPEED="0"

# TCP/UDP checksum offload
#  (0) disable
#  (1) enable
#TCP_CSUM_OFFLD="1"

# Debug Level
#  (0) quiet
#  (debug mask)
#DEBUG="0"

## == Nothing to customize below this line == ##

[ "${IFACE}" != "wlan0" ] && exit 0

FIRMWARE_DIR="/lib/firmware/redpine/"

MAC_ADDR=`cat /proc/cmdline | sed 's/\s/\n/g' | awk '/ethaddr2/ {print}' | sed 's/ethaddr2=//g'`
if [ -z "${MAC_ADDR}" -o "${MAC_ADDR}" = "00:00:00:00:00:00" ]; then
	MAC_ADDR="00:04:F3:AA:BB:05"
fi

# Driver mode variable in u-boot takes precedence (for test purposes)
wdmode=`cat /proc/cmdline | sed 's/\s/\n/g' | awk '/wdmode/ {print}' | sed 's/wdmode=//g'`
[ "${wdmode}" = "1" -o "${wdmode}" = "2" ] && DRIVER_MODE="${wdmode}"

# Crystal frequency depends on the platform and HW revision.
#
#         +---------------------+--------------+
#         | platform            | crystal_freq |
#         +---------------------+--------------+
#         | cwme9210js          |   20000000   |
#         | ccimx51js (rev = 0) |   20000000   |
#         | ccimx51js (rev > 0) |   40000000   |
#         | ccimx53js           |   40000000   |
#         +---------------------+--------------+
#
# Default is 20MHz, so in that case we don't need to set the parameter on load.
read -r platform < /sys/kernel/machine/name
if [ "${platform}" = "ccimx53" ]; then
	CRYSTAL_FREQ=40000000
else
	mod_rev="/sys/kernel/ccimx51/mod_rev"
	[ -f "${mod_rev}" ] && [ "$(cat ${mod_rev})" -gt "0" ] && CRYSTAL_FREQ=40000000
fi

# Master module kernel parameters
[ -n "${DRIVER_MODE}" ] && \
	master_params="${master_params} driver_mode=${DRIVER_MODE}"
[ -n "${BT_COEXISTENCE}" ] && \
	master_params="${master_params} BT_Coexistence=${BT_COEXISTENCE}"
[ -n "${SDIO_CLK}" ] && \
	master_params="${master_params} sdio_clock=${SDIO_CLK}"
[ -n "${ENABLE_HIGH_SPEED}" ] && \
	master_params="${master_params} enable_high_speed=${ENABLE_HIGH_SPEED}"
[ -n "${TCP_CSUM_OFFLD}" ] && \
	master_params="${master_params} tcp_csumoffld_enable=${TCP_CSUM_OFFLD}"
[ -n "${FIRMWARE_DIR}" ] && \
	master_params="${master_params} firmware_path=${FIRMWARE_DIR}"
[ -n "${DEBUG}" ] && \
	master_params="${master_params} dbg_level=${DEBUG}"

# Client module kernel parameters
[ -n "${CRYSTAL_FREQ}" ] && \
	client_params="${client_params} crystal_freq=${CRYSTAL_FREQ}"
[ -n "${MAC_ADDR}" ] && \
	client_params="${client_params} macaddr=${MAC_ADDR}"

# Load the client module
grep -qs rsi_client /proc/modules || \
	/sbin/modprobe -q rsi_client ${client_params} || \
		echo "Loading rsi_client module: [FAILED]"

# Load the master module
grep -qs rsi_master /proc/modules || \
	/sbin/modprobe -q rsi_master ${master_params} || \
		echo "Loading rsi_master module: [FAILED]"

# Delay required so the interface 'wlan0' is settled down before trying to configure it.
sleep 1