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Commit 4c8a32f5 authored by Christian Lamparter's avatar Christian Lamparter Committed by John W. Linville
Browse files

p54: Move eeprom code 



Copy the eeprom code from p54common.c into a new file eeprom.c

Signed-off-by: default avatarChristian Lamparter <chunkeey@web.de>
Signed-off-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 35a0ace7

drivers/net/wireless/p54/eeprom.c

0 → 100644
+564 −0
Original line number Diff line number Diff line 
/*

 * EEPROM parser code for mac80211 Prism54 drivers

 *

 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>

 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>

 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>

 *

 * Based on:

 * - the islsm (softmac prism54) driver, which is:

 *   Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.

 * - stlc45xx driver

 *   Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).

 *

 * 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.

 */



#include <linux/init.h>

#include <linux/firmware.h>

#include <linux/etherdevice.h>



#include <net/mac80211.h>



#include "p54.h"

#include "eeprom.h"

#include "lmac.h"



static struct ieee80211_rate p54_bgrates[] = {

	{ .bitrate = 10, .hw_value = 0, },

	{ .bitrate = 20, .hw_value = 1, .flags = IEEE80211_RATE_SHORT_PREAMBLE },

	{ .bitrate = 55, .hw_value = 2, .flags = IEEE80211_RATE_SHORT_PREAMBLE },

	{ .bitrate = 110, .hw_value = 3, .flags = IEEE80211_RATE_SHORT_PREAMBLE },

	{ .bitrate = 60, .hw_value = 4, },

	{ .bitrate = 90, .hw_value = 5, },

	{ .bitrate = 120, .hw_value = 6, },

	{ .bitrate = 180, .hw_value = 7, },

	{ .bitrate = 240, .hw_value = 8, },

	{ .bitrate = 360, .hw_value = 9, },

	{ .bitrate = 480, .hw_value = 10, },

	{ .bitrate = 540, .hw_value = 11, },

};



static struct ieee80211_channel p54_bgchannels[] = {

	{ .center_freq = 2412, .hw_value = 1, },

	{ .center_freq = 2417, .hw_value = 2, },

	{ .center_freq = 2422, .hw_value = 3, },

	{ .center_freq = 2427, .hw_value = 4, },

	{ .center_freq = 2432, .hw_value = 5, },

	{ .center_freq = 2437, .hw_value = 6, },

	{ .center_freq = 2442, .hw_value = 7, },

	{ .center_freq = 2447, .hw_value = 8, },

	{ .center_freq = 2452, .hw_value = 9, },

	{ .center_freq = 2457, .hw_value = 10, },

	{ .center_freq = 2462, .hw_value = 11, },

	{ .center_freq = 2467, .hw_value = 12, },

	{ .center_freq = 2472, .hw_value = 13, },

	{ .center_freq = 2484, .hw_value = 14, },

};



static struct ieee80211_supported_band band_2GHz = {

	.channels = p54_bgchannels,

	.n_channels = ARRAY_SIZE(p54_bgchannels),

	.bitrates = p54_bgrates,

	.n_bitrates = ARRAY_SIZE(p54_bgrates),

};



static struct ieee80211_rate p54_arates[] = {

	{ .bitrate = 60, .hw_value = 4, },

	{ .bitrate = 90, .hw_value = 5, },

	{ .bitrate = 120, .hw_value = 6, },

	{ .bitrate = 180, .hw_value = 7, },

	{ .bitrate = 240, .hw_value = 8, },

	{ .bitrate = 360, .hw_value = 9, },

	{ .bitrate = 480, .hw_value = 10, },

	{ .bitrate = 540, .hw_value = 11, },

};



static struct ieee80211_channel p54_achannels[] = {

	{ .center_freq = 4920 },

	{ .center_freq = 4940 },

	{ .center_freq = 4960 },

	{ .center_freq = 4980 },

	{ .center_freq = 5040 },

	{ .center_freq = 5060 },

	{ .center_freq = 5080 },

	{ .center_freq = 5170 },

	{ .center_freq = 5180 },

	{ .center_freq = 5190 },

	{ .center_freq = 5200 },

	{ .center_freq = 5210 },

	{ .center_freq = 5220 },

	{ .center_freq = 5230 },

	{ .center_freq = 5240 },

	{ .center_freq = 5260 },

	{ .center_freq = 5280 },

	{ .center_freq = 5300 },

	{ .center_freq = 5320 },

	{ .center_freq = 5500 },

	{ .center_freq = 5520 },

	{ .center_freq = 5540 },

	{ .center_freq = 5560 },

	{ .center_freq = 5580 },

	{ .center_freq = 5600 },

	{ .center_freq = 5620 },

	{ .center_freq = 5640 },

	{ .center_freq = 5660 },

	{ .center_freq = 5680 },

	{ .center_freq = 5700 },

	{ .center_freq = 5745 },

	{ .center_freq = 5765 },

	{ .center_freq = 5785 },

	{ .center_freq = 5805 },

	{ .center_freq = 5825 },

};



static struct ieee80211_supported_band band_5GHz = {

	.channels = p54_achannels,

	.n_channels = ARRAY_SIZE(p54_achannels),

	.bitrates = p54_arates,

	.n_bitrates = ARRAY_SIZE(p54_arates),

};



static int p54_convert_rev0(struct ieee80211_hw *dev,

			    struct pda_pa_curve_data *curve_data)

{

	struct p54_common *priv = dev->priv;

	struct p54_pa_curve_data_sample *dst;

	struct pda_pa_curve_data_sample_rev0 *src;

	size_t cd_len = sizeof(*curve_data) +

		(curve_data->points_per_channel*sizeof(*dst) + 2) *

		 curve_data->channels;

	unsigned int i, j;

	void *source, *target;



	priv->curve_data = kmalloc(sizeof(*priv->curve_data) + cd_len,

				   GFP_KERNEL);

	if (!priv->curve_data)

		return -ENOMEM;



	priv->curve_data->entries = curve_data->channels;

	priv->curve_data->entry_size = sizeof(__le16) +

		sizeof(*dst) * curve_data->points_per_channel;

	priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);

	priv->curve_data->len = cd_len;

	memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));

	source = curve_data->data;

	target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;

	for (i = 0; i < curve_data->channels; i++) {

		__le16 *freq = source;

		source += sizeof(__le16);

		*((__le16 *)target) = *freq;

		target += sizeof(__le16);

		for (j = 0; j < curve_data->points_per_channel; j++) {

			dst = target;

			src = source;



			dst->rf_power = src->rf_power;

			dst->pa_detector = src->pa_detector;

			dst->data_64qam = src->pcv;

			/* "invent" the points for the other modulations */

#define SUB(x, y) (u8)(((x) - (y)) > (x) ? 0 : (x) - (y))

			dst->data_16qam = SUB(src->pcv, 12);

			dst->data_qpsk = SUB(dst->data_16qam, 12);

			dst->data_bpsk = SUB(dst->data_qpsk, 12);

			dst->data_barker = SUB(dst->data_bpsk, 14);

#undef SUB

			target += sizeof(*dst);

			source += sizeof(*src);

		}

	}



	return 0;

}



static int p54_convert_rev1(struct ieee80211_hw *dev,

			    struct pda_pa_curve_data *curve_data)

{

	struct p54_common *priv = dev->priv;

	struct p54_pa_curve_data_sample *dst;

	struct pda_pa_curve_data_sample_rev1 *src;

	size_t cd_len = sizeof(*curve_data) +

		(curve_data->points_per_channel*sizeof(*dst) + 2) *

		 curve_data->channels;

	unsigned int i, j;

	void *source, *target;



	priv->curve_data = kzalloc(cd_len + sizeof(*priv->curve_data),

				   GFP_KERNEL);

	if (!priv->curve_data)

		return -ENOMEM;



	priv->curve_data->entries = curve_data->channels;

	priv->curve_data->entry_size = sizeof(__le16) +

		sizeof(*dst) * curve_data->points_per_channel;

	priv->curve_data->offset = offsetof(struct pda_pa_curve_data, data);

	priv->curve_data->len = cd_len;

	memcpy(priv->curve_data->data, curve_data, sizeof(*curve_data));

	source = curve_data->data;

	target = ((struct pda_pa_curve_data *) priv->curve_data->data)->data;

	for (i = 0; i < curve_data->channels; i++) {

		__le16 *freq = source;

		source += sizeof(__le16);

		*((__le16 *)target) = *freq;

		target += sizeof(__le16);

		for (j = 0; j < curve_data->points_per_channel; j++) {

			memcpy(target, source, sizeof(*src));



			target += sizeof(*dst);

			source += sizeof(*src);

		}

		source++;

	}



	return 0;

}



static const char *p54_rf_chips[] = { "INVALID-0", "Duette3", "Duette2",

	"Frisbee", "Xbow", "Longbow", "INVALID-6", "INVALID-7" };



static void p54_parse_rssical(struct ieee80211_hw *dev, void *data, int len,

			     u16 type)

{

	struct p54_common *priv = dev->priv;

	int offset = (type == PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED) ? 2 : 0;

	int entry_size = sizeof(struct pda_rssi_cal_entry) + offset;

	int num_entries = (type == PDR_RSSI_LINEAR_APPROXIMATION) ? 1 : 2;

	int i;



	if (len != (entry_size * num_entries)) {

		printk(KERN_ERR "%s: unknown rssi calibration data packing "

				 " type:(%x) len:%d.\n",

		       wiphy_name(dev->wiphy), type, len);



		print_hex_dump_bytes("rssical:", DUMP_PREFIX_NONE,

				     data, len);



		printk(KERN_ERR "%s: please report this issue.\n",

			wiphy_name(dev->wiphy));

		return;

	}



	for (i = 0; i < num_entries; i++) {

		struct pda_rssi_cal_entry *cal = data +

						 (offset + i * entry_size);

		priv->rssical_db[i].mul = (s16) le16_to_cpu(cal->mul);

		priv->rssical_db[i].add = (s16) le16_to_cpu(cal->add);

	}

}



static void p54_parse_default_country(struct ieee80211_hw *dev,

				      void *data, int len)

{

	struct pda_country *country;



	if (len != sizeof(*country)) {

		printk(KERN_ERR "%s: found possible invalid default country "

				"eeprom entry. (entry size: %d)\n",

		       wiphy_name(dev->wiphy), len);



		print_hex_dump_bytes("country:", DUMP_PREFIX_NONE,

				     data, len);



		printk(KERN_ERR "%s: please report this issue.\n",

			wiphy_name(dev->wiphy));

		return;

	}



	country = (struct pda_country *) data;

	if (country->flags == PDR_COUNTRY_CERT_CODE_PSEUDO)

		regulatory_hint(dev->wiphy, country->alpha2);

	else {

		/* TODO:

		 * write a shared/common function that converts

		 * "Regulatory domain codes" (802.11-2007 14.8.2.2)

		 * into ISO/IEC 3166-1 alpha2 for regulatory_hint.

		 */

	}

}



static int p54_convert_output_limits(struct ieee80211_hw *dev,

				     u8 *data, size_t len)

{

	struct p54_common *priv = dev->priv;



	if (len < 2)

		return -EINVAL;



	if (data[0] != 0) {

		printk(KERN_ERR "%s: unknown output power db revision:%x\n",

		       wiphy_name(dev->wiphy), data[0]);

		return -EINVAL;

	}



	if (2 + data[1] * sizeof(struct pda_channel_output_limit) > len)

		return -EINVAL;



	priv->output_limit = kmalloc(data[1] *

		sizeof(struct pda_channel_output_limit) +

		sizeof(*priv->output_limit), GFP_KERNEL);



	if (!priv->output_limit)

		return -ENOMEM;



	priv->output_limit->offset = 0;

	priv->output_limit->entries = data[1];

	priv->output_limit->entry_size =

		sizeof(struct pda_channel_output_limit);

	priv->output_limit->len = priv->output_limit->entry_size *

				  priv->output_limit->entries +

				  priv->output_limit->offset;



	memcpy(priv->output_limit->data, &data[2],

	       data[1] * sizeof(struct pda_channel_output_limit));



	return 0;

}



static struct p54_cal_database *p54_convert_db(struct pda_custom_wrapper *src,

					       size_t total_len)

{

	struct p54_cal_database *dst;

	size_t payload_len, entries, entry_size, offset;



	payload_len = le16_to_cpu(src->len);

	entries = le16_to_cpu(src->entries);

	entry_size = le16_to_cpu(src->entry_size);

	offset = le16_to_cpu(src->offset);

	if (((entries * entry_size + offset) != payload_len) ||

	     (payload_len + sizeof(*src) != total_len))

		return NULL;



	dst = kmalloc(sizeof(*dst) + payload_len, GFP_KERNEL);

	if (!dst)

		return NULL;



	dst->entries = entries;

	dst->entry_size = entry_size;

	dst->offset = offset;

	dst->len = payload_len;



	memcpy(dst->data, src->data, payload_len);

	return dst;

}



int p54_parse_eeprom(struct ieee80211_hw *dev, void *eeprom, int len)

{

	struct p54_common *priv = dev->priv;

	struct eeprom_pda_wrap *wrap = NULL;

	struct pda_entry *entry;

	unsigned int data_len, entry_len;

	void *tmp;

	int err;

	u8 *end = (u8 *)eeprom + len;

	u16 synth = 0;



	wrap = (struct eeprom_pda_wrap *) eeprom;

	entry = (void *)wrap->data + le16_to_cpu(wrap->len);



	/* verify that at least the entry length/code fits */

	while ((u8 *)entry <= end - sizeof(*entry)) {

		entry_len = le16_to_cpu(entry->len);

		data_len = ((entry_len - 1) << 1);



		/* abort if entry exceeds whole structure */

		if ((u8 *)entry + sizeof(*entry) + data_len > end)

			break;



		switch (le16_to_cpu(entry->code)) {

		case PDR_MAC_ADDRESS:

			if (data_len != ETH_ALEN)

				break;

			SET_IEEE80211_PERM_ADDR(dev, entry->data);

			break;

		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS:

			if (priv->output_limit)

				break;

			err = p54_convert_output_limits(dev, entry->data,

							data_len);

			if (err)

				goto err;

			break;

		case PDR_PRISM_PA_CAL_CURVE_DATA: {

			struct pda_pa_curve_data *curve_data =

				(struct pda_pa_curve_data *)entry->data;

			if (data_len < sizeof(*curve_data)) {

				err = -EINVAL;

				goto err;

			}



			switch (curve_data->cal_method_rev) {

			case 0:

				err = p54_convert_rev0(dev, curve_data);

				break;

			case 1:

				err = p54_convert_rev1(dev, curve_data);

				break;

			default:

				printk(KERN_ERR "%s: unknown curve data "

						"revision %d\n",

						wiphy_name(dev->wiphy),

						curve_data->cal_method_rev);

				err = -ENODEV;

				break;

			}

			if (err)

				goto err;

			}

			break;

		case PDR_PRISM_ZIF_TX_IQ_CALIBRATION:

			priv->iq_autocal = kmalloc(data_len, GFP_KERNEL);

			if (!priv->iq_autocal) {

				err = -ENOMEM;

				goto err;

			}



			memcpy(priv->iq_autocal, entry->data, data_len);

			priv->iq_autocal_len = data_len / sizeof(struct pda_iq_autocal_entry);

			break;

		case PDR_DEFAULT_COUNTRY:

			p54_parse_default_country(dev, entry->data, data_len);

			break;

		case PDR_INTERFACE_LIST:

			tmp = entry->data;

			while ((u8 *)tmp < entry->data + data_len) {

				struct exp_if *exp_if = tmp;

				if (exp_if->if_id == cpu_to_le16(IF_ID_ISL39000))

					synth = le16_to_cpu(exp_if->variant);

				tmp += sizeof(*exp_if);

			}

			break;

		case PDR_HARDWARE_PLATFORM_COMPONENT_ID:

			if (data_len < 2)

				break;

			priv->version = *(u8 *)(entry->data + 1);

			break;

		case PDR_RSSI_LINEAR_APPROXIMATION:

		case PDR_RSSI_LINEAR_APPROXIMATION_DUAL_BAND:

		case PDR_RSSI_LINEAR_APPROXIMATION_EXTENDED:

			p54_parse_rssical(dev, entry->data, data_len,

					  le16_to_cpu(entry->code));

			break;

		case PDR_RSSI_LINEAR_APPROXIMATION_CUSTOM: {

			__le16 *src = (void *) entry->data;

			s16 *dst = (void *) &priv->rssical_db;

			int i;



			if (data_len != sizeof(priv->rssical_db)) {

				err = -EINVAL;

				goto err;

			}

			for (i = 0; i < sizeof(priv->rssical_db) /

					sizeof(*src); i++)

				*(dst++) = (s16) le16_to_cpu(*(src++));

			}

			break;

		case PDR_PRISM_PA_CAL_OUTPUT_POWER_LIMITS_CUSTOM: {

			struct pda_custom_wrapper *pda = (void *) entry->data;

			if (priv->output_limit || data_len < sizeof(*pda))

				break;

			priv->output_limit = p54_convert_db(pda, data_len);

			}

			break;

		case PDR_PRISM_PA_CAL_CURVE_DATA_CUSTOM: {

			struct pda_custom_wrapper *pda = (void *) entry->data;

			if (priv->curve_data || data_len < sizeof(*pda))

				break;

			priv->curve_data = p54_convert_db(pda, data_len);

			}

			break;

		case PDR_END:

			/* make it overrun */

			entry_len = len;

			break;

		default:

			break;

		}



		entry = (void *)entry + (entry_len + 1)*2;

	}



	if (!synth || !priv->iq_autocal || !priv->output_limit ||

	    !priv->curve_data) {

		printk(KERN_ERR "%s: not all required entries found in eeprom!\n",

			wiphy_name(dev->wiphy));

		err = -EINVAL;

		goto err;

	}



	priv->rxhw = synth & PDR_SYNTH_FRONTEND_MASK;

	if (priv->rxhw == PDR_SYNTH_FRONTEND_XBOW)

		p54_init_xbow_synth(priv);

	if (!(synth & PDR_SYNTH_24_GHZ_DISABLED))

		dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &band_2GHz;

	if (!(synth & PDR_SYNTH_5_GHZ_DISABLED))

		dev->wiphy->bands[IEEE80211_BAND_5GHZ] = &band_5GHz;

	if ((synth & PDR_SYNTH_RX_DIV_MASK) == PDR_SYNTH_RX_DIV_SUPPORTED)

		priv->rx_diversity_mask = 3;

	if ((synth & PDR_SYNTH_TX_DIV_MASK) == PDR_SYNTH_TX_DIV_SUPPORTED)

		priv->tx_diversity_mask = 3;



	if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {

		u8 perm_addr[ETH_ALEN];



		printk(KERN_WARNING "%s: Invalid hwaddr! Using randomly generated MAC addr\n",

			wiphy_name(dev->wiphy));

		random_ether_addr(perm_addr);

		SET_IEEE80211_PERM_ADDR(dev, perm_addr);

	}



	printk(KERN_INFO "%s: hwaddr %pM, MAC:isl38%02x RF:%s\n",

		wiphy_name(dev->wiphy),	dev->wiphy->perm_addr, priv->version,

		p54_rf_chips[priv->rxhw]);



	return 0;



err:

	kfree(priv->iq_autocal);

	kfree(priv->output_limit);

	kfree(priv->curve_data);

	priv->iq_autocal = NULL;

	priv->output_limit = NULL;

	priv->curve_data = NULL;



	printk(KERN_ERR "%s: eeprom parse failed!\n",

		wiphy_name(dev->wiphy));

	return err;

}

EXPORT_SYMBOL_GPL(p54_parse_eeprom);



int p54_read_eeprom(struct ieee80211_hw *dev)

{

	struct p54_common *priv = dev->priv;

	size_t eeprom_size = 0x2020, offset = 0, blocksize, maxblocksize;

	int ret = -ENOMEM;

	void *eeprom = NULL;



	maxblocksize = EEPROM_READBACK_LEN;

	if (priv->fw_var >= 0x509)

		maxblocksize -= 0xc;

	else

		maxblocksize -= 0x4;



	eeprom = kzalloc(eeprom_size, GFP_KERNEL);

	if (unlikely(!eeprom))

		goto free;



	while (eeprom_size) {

		blocksize = min(eeprom_size, maxblocksize);

		ret = p54_download_eeprom(priv, (void *) (eeprom + offset),

					  offset, blocksize);

		if (unlikely(ret))

			goto free;



		offset += blocksize;

		eeprom_size -= blocksize;

	}



	ret = p54_parse_eeprom(dev, eeprom, offset);

free:

	kfree(eeprom);

	return ret;

}

EXPORT_SYMBOL_GPL(p54_read_eeprom);