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iwlwifi: changing EEPROM layout handling

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This patch
1. changes the current EEPROM handling through a single HW struct
layout representation, to more general approach, treating the EEPROM
image as a flat bytes array, handling this image through ops functions
and offsets.
2. Eeprom is dynamically allocated accroding HW type

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Ron Rindjunsky <ron.rindjunsky@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Tomas Winkler
2008-04-21 15:41:52 -07:00
committed by John W. Linville
parent 5da4b55f78
commit 073d3f5f1b
7 changed files with 187 additions and 147 deletions
Download Patch File Download Diff File Expand all files Collapse all files

101
drivers/net/wireless/iwlwifi/iwl-eeprom.c
View File

@@ -193,6 +193,12 @@ void iwlcore_eeprom_release_semaphore(struct iwl_priv *priv)
}
EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
const u8 *iwlcore_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
{
BUG_ON(offset >= priv->cfg->eeprom_size);
return &priv->eeprom[offset];
}
EXPORT_SYMBOL(iwlcore_eeprom_query_addr);
/**
* iwl_eeprom_init - read EEPROM contents
@@ -203,30 +209,35 @@ EXPORT_SYMBOL(iwlcore_eeprom_release_semaphore);
*/
int iwl_eeprom_init(struct iwl_priv *priv)
{
u16 *e = (u16 *)&priv->eeprom;
u16 *e;
u32 gp = iwl_read32(priv, CSR_EEPROM_GP);
u32 r;
int sz = sizeof(priv->eeprom);
int sz = priv->cfg->eeprom_size;
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);
/* allocate eeprom */
priv->eeprom = kzalloc(sz, GFP_KERNEL);
if (!priv->eeprom) {
ret = -ENOMEM;
goto alloc_err;
}
e = (u16 *)priv->eeprom;
if ((gp & CSR_EEPROM_GP_VALID_MSK) == CSR_EEPROM_GP_BAD_SIGNATURE) {
ret = priv->cfg->ops->lib->eeprom_ops.verify_signature(priv);
if (ret < 0) {
IWL_ERROR("EEPROM not found, EEPROM_GP=0x%08x", gp);
return -ENOENT;
ret = -ENOENT;
goto err;
}
/* 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;
ret = -ENOENT;
goto err;
}
/* eeprom is an array of 16bit values */
@@ -250,61 +261,93 @@ int iwl_eeprom_init(struct iwl_priv *priv)
e[addr / 2] = le16_to_cpu((__force __le16)(r >> 16));
}
ret = 0;
done:
priv->cfg->ops->lib->eeprom_ops.release_semaphore(priv);
err:
if (ret)
kfree(priv->eeprom);
alloc_err:
return ret;
}
EXPORT_SYMBOL(iwl_eeprom_init);
void iwl_eeprom_free(struct iwl_priv *priv)
{
if(priv->eeprom)
kfree(priv->eeprom);
priv->eeprom = NULL;
}
EXPORT_SYMBOL(iwl_eeprom_free);
const u8 *iwl_eeprom_query_addr(const struct iwl_priv *priv, size_t offset)
{
return priv->cfg->ops->lib->eeprom_ops.query_addr(priv, offset);
}
EXPORT_SYMBOL(iwl_eeprom_query_addr);
u16 iwl_eeprom_query16(const struct iwl_priv *priv, size_t offset)
{
return (u16)priv->eeprom[offset] | ((u16)priv->eeprom[offset + 1] << 8);
}
EXPORT_SYMBOL(iwl_eeprom_query16);
void iwl_eeprom_get_mac(const struct iwl_priv *priv, u8 *mac)
{
memcpy(mac, priv->eeprom.mac_address, 6);
const u8 *addr = priv->cfg->ops->lib->eeprom_ops.query_addr(priv,
EEPROM_MAC_ADDRESS);
memcpy(mac, addr, ETH_ALEN);
}
EXPORT_SYMBOL(iwl_eeprom_get_mac);
static void iwl_init_band_reference(const struct iwl_priv *priv,
int band,
int *eeprom_ch_count,
const struct iwl4965_eeprom_channel
**eeprom_ch_info,
const u8 **eeprom_ch_index)
int eep_band, int *eeprom_ch_count,
const struct iwl_eeprom_channel **eeprom_ch_info,
const u8 **eeprom_ch_index)
{
switch (band) {
u32 offset = priv->cfg->ops->lib->
eeprom_ops.regulatory_bands[eep_band - 1];
switch (eep_band) {
case 1: /* 2.4GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_1);
*eeprom_ch_info = priv->eeprom.band_1_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_1;
break;
case 2: /* 4.9GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_2);
*eeprom_ch_info = priv->eeprom.band_2_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_2;
break;
case 3: /* 5.2GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_3);
*eeprom_ch_info = priv->eeprom.band_3_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_3;
break;
case 4: /* 5.5GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_4);
*eeprom_ch_info = priv->eeprom.band_4_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_4;
break;
case 5: /* 5.7GHz band */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_5);
*eeprom_ch_info = priv->eeprom.band_5_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_5;
break;
case 6: /* 2.4GHz FAT channels */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_6);
*eeprom_ch_info = priv->eeprom.band_24_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_6;
break;
case 7: /* 5 GHz FAT channels */
*eeprom_ch_count = ARRAY_SIZE(iwl_eeprom_band_7);
*eeprom_ch_info = priv->eeprom.band_52_channels;
*eeprom_ch_info = (struct iwl_eeprom_channel *)
iwl_eeprom_query_addr(priv, offset);
*eeprom_ch_index = iwl_eeprom_band_7;
break;
default:
@@ -323,7 +366,7 @@ static void iwl_init_band_reference(const struct iwl_priv *priv,
*/
static int iwl4965_set_fat_chan_info(struct iwl_priv *priv,
enum ieee80211_band band, u16 channel,
const struct iwl4965_eeprom_channel *eeprom_ch,
const struct iwl_eeprom_channel *eeprom_ch,
u8 fat_extension_channel)
{
struct iwl_channel_info *ch_info;
@@ -372,7 +415,7 @@ int iwl_init_channel_map(struct iwl_priv *priv)
{
int eeprom_ch_count = 0;
const u8 *eeprom_ch_index = NULL;
const struct iwl4965_eeprom_channel *eeprom_ch_info = NULL;
const struct iwl_eeprom_channel *eeprom_ch_info = NULL;
int band, ch;
struct iwl_channel_info *ch_info;
@@ -381,9 +424,9 @@ int iwl_init_channel_map(struct iwl_priv *priv)
return 0;
}
if (priv->eeprom.version < 0x2f) {
if (iwl_eeprom_query16(priv, EEPROM_VERSION) < 0x2f) {
IWL_WARNING("Unsupported EEPROM version: 0x%04X\n",
priv->eeprom.version);
iwl_eeprom_query16(priv, EEPROM_VERSION));
return -EINVAL;
}